CN113147866A

CN113147866A - One-man operated duplex medical oxygen cylinder carrier

Info

Publication number: CN113147866A
Application number: CN202110562409.2A
Authority: CN
Inventors: 王水龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-07-23

Abstract

The invention discloses a one-man operated duplex medical oxygen cylinder carrier, two wheels are arranged on two sides of a frame, three universal casters are arranged on the rear side of the frame, each clamping plate is driven by an arm, two clamping mechanisms are rotationally connected with the frame, the communication between the hydraulic pump and the two hydraulic cylinders is controlled by the reversing valve, the extension of the corresponding hydraulic cylinders can be realized by stepping on the pedal, so that the hydraulic cylinders can drive the first chain and the second chain to rotate through the mandril, thereby the four clamping plates in the corresponding clamping mechanism clamp the oxygen cylinder, the thrust of the corresponding hydraulic cylinder can be removed by treading the pressure release valve, so that the first spring and the second spring can pull the mandril downwards to release the clamping of the four clamping plates on the oxygen cylinder, the clamping mechanism swings forwards to enable the front supporting wheel to contact the ground, a transport to the oxygen cylinder can be realized after being used for realizing the centre gripping and the process of releasing of oxygen cylinder, fixture to the backswing and locking.

Description

One-man operated duplex medical oxygen cylinder carrier

Technical Field

The invention relates to the field of carriers, in particular to a one-man operated duplex medical oxygen cylinder carrier.

Background

The oxygen cylinder is a very frequently used and very important medical device in a hospital, and is mainly used for the auxiliary treatment of respiratory system diseases (such as asthma, bronchitis, pulmonary heart disease and the like) and heart and cerebrovascular system diseases (such as coronary heart disease, myocardial infarction, cerebral hemorrhage and cerebral infarction) caused by oxygen deficiency so as to relieve the oxygen deficiency symptom; can also be used for health care oxygen inhalation or rapid relief of fatigue after mental labor and physical labor; oxygen cylinder erects in the ward generally during oxygen therapy, because oxygen cylinder is thin high, stability is very poor, if touch carelessly, takes place to empty very easily, in case empty, the patient will be very dangerous, and oxygen cylinder is from great moreover, need remove after using up and change new oxygen cylinder, and the body is smooth cylinder, does not have the stress point, is difficult to the transport.

The oxygen cylinder is a high-pressure container for storing and transporting oxygen, generally, a cylindrical airtight bottle body is made of alloy structural steel through stamping and welding, the whole weight is larger after the oxygen cylinder is filled with high-pressure oxygen, and the oxygen cylinder can be lifted and moved by two workers in a close-distance moving mode, but the danger is larger, and the personal safety of peripheral personnel is also threatened greatly; the transportation of longer distance can be realized through the oxygen cylinder carrier, the oxygen cylinder carrier usually includes the automobile body of slim and long type, the automobile body lower extreme has the layer board, the lower part of automobile body is provided with the gyro wheel, when carrying the oxygen cylinder, adjust the automobile body to vertical state, a staff lifts the bottom one side of oxygen cylinder off ground earlier, another staff impels the automobile body, make the layer board stretch into between the bottom surface and the ground of oxygen cylinder, then release the oxygen cylinder, the bottom of oxygen cylinder just is located the layer board, fix the jar body on the carrier main part with the bandage, pull the upper end of automobile body backward again, make the automobile body incline backward, it shifts the oxygen cylinder to promote the automobile body at last, this kind of method needs two people to cooperate just can accomplish, and consuming time and difficultly, efficiency is lower.

The invention patent with publication number CN107600130A discloses a medical oxygen bottle carrier, in order to make a pushing plate push an oxygen bottle forward to incline, a supporting plate is required to press the ground tightly and the carrier body is pushed forward, so that the pushing plate is pushed forward by the transmission of a bevel gear transmission rod, after the pushing plate pushes the oxygen bottle forward to generate a gap with the ground, the carrier body is pushed forward to insert the supporting plate into the lower side of the oxygen bottle, and the carrier body is pushed backward, thereby completing the loading of the oxygen bottle, but the technical defects are as follows: firstly, the oxygen cylinder is a slender cylinder, when the pushing plate pushes the oxygen cylinder to incline forwards, the gravity center of the oxygen cylinder is easy to move forwards and exceeds the range of the bottom of the oxygen cylinder, so that the oxygen cylinder drives the carrier to dump forwards through the protective belt, personnel are easy to hurt, and high-pressure oxygen in the oxygen cylinder can be exploded due to large vibration, thereby causing greater safety accidents; secondly, waterproof and anti-skid coatings are generally brushed on the ground of the ward, and when the carrier body is pushed forwards, the supporting plate always presses the ground, so that the ground coating can be scratched, scraping noise can be generated, and the recovery of patients is not favorable; the structure is unreasonable, the pushing plate can be extended forwards and the oxygen cylinder can be pushed forwards by the forward tilting carrier body, and when the supporting plate is about to be inserted into the lower end of the oxygen cylinder, if the oxygen cylinder is not tilted forwards, the supporting plate cannot be inserted into the lower end of the oxygen cylinder; if the oxygen cylinder is inclined forwards, the oxygen cylinder moves forwards continuously to ensure that the oxygen cylinder inclines forwards in the process that the supporting plate is inserted into the lower end of the oxygen cylinder, so that the oxygen cylinder is toppled forwards to cause safety accidents; fourthly, the operation is very difficult, and an operator needs to control the proper forward inclination angle of the carrier body and push the carrier to move forward to insert the supporting plate into the lower end of the oxygen cylinder in the process of loading the oxygen cylinder; the carrier inclines forward the angle undersize, and the gap between oxygen cylinder and the ground is not enough inserts the layer board, and the carrier inclines forward the angle oversize, will make the oxygen cylinder empty forward again, and the operation degree of difficulty when uninstalling the oxygen cylinder is also great.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a one-man operated duplex medical oxygen cylinder carrier which is novel in structure, stable in movement and convenient to use.

The technical scheme adopted by the invention is as follows: the utility model provides a medical oxygen cylinder carrier of pair of one-man operation, includes frame mechanism, first fixture, second fixture, locking mechanism, its characterized in that: the frame mechanism comprises a frame, wheels, a hydraulic pump, universal casters, a first hydraulic pipe and a second hydraulic pipe; the first clamping mechanism comprises a front supporting wheel, a hydraulic cylinder, a first arm, a second arm, a third arm, a fourth arm, a clamping plate, a mandril, a roll-over stand, a spring terminal, a first spring, a second spring, a first chain and a second chain, and the second clamping mechanism has the same structure as the first clamping mechanism; the locking mechanism comprises a locking plate structure, a swing rod and a pull ring rod.

Two wheels are respectively and rotatably arranged on two sides of a frame, three universal casters are arranged on the lower side of the rear end of the frame, a hydraulic pump is fixedly arranged on the rear side of the frame, a first clamping mechanism is rotatably arranged in front of the right side of the frame, a second clamping mechanism is rotatably arranged in front of the left side of the frame, the left ends of a first arm and a third arm in the first clamping mechanism are respectively and rotatably provided with a clamping plate, the right ends are respectively provided with a chain wheel and are respectively and rotatably connected with the back surface of a turnover frame, a first chain is matched with two chain wheels at the right ends of the first arm and the third arm, the right ends of the second arm and the fourth arm are respectively and rotatably provided with a clamping plate, the left ends are respectively provided with a chain wheel and are respectively and rotatably connected with the back surface of the turnover frame, a second chain is matched with two chain wheels at the left ends of the second arm and the fourth arm, a hydraulic cylinder is fixedly connected with the turnover frame, and can drive the first chain and the second chain to rotate through a mandril after the hydraulic cylinder is extended, thereby first arm, second arm, third arm, fourth arm pivot downwards simultaneously to four splint in the first fixture realize the centre gripping to the oxygen cylinder, behind the thrust of uninstallation pneumatic cylinder, first spring, second spring can pull the ejector pin downwards, make four splint in the first fixture release the centre gripping to the oxygen cylinder.

The first hydraulic pipe connects the hydraulic pump with the hydraulic cylinder in the first clamping mechanism, the second hydraulic pipe connects the hydraulic pump with the hydraulic cylinder in the second clamping mechanism, when the reversing valve is pulled to the right, the hydraulic pump can realize the operations of pressurizing and decompressing the hydraulic cylinder in the first clamping mechanism, when the reversing valve is pulled leftwards, the hydraulic pump can realize pressurizeing and the pressure release operation to the pneumatic cylinder in the second fixture, step on the footboard and can make corresponding hydro-cylinder extension, step on the thrust that the corresponding pneumatic cylinder can be dismantled to the relief valve, a locking mechanism is all installed to first fixture and second fixture upper end, locking mechanism can lean on the roll-over stand that corresponds behind the tight frame locking, first fixture or second fixture can make two front supporting wheels contact ground after swinging forward, this state is used for realizing the centre gripping and the process of releasing the oxygen cylinder, can realize the transportation to the oxygen cylinder after first fixture and second fixture swung backward and the locking.

Preferably, the middle position of the upper end of the frame in the frame mechanism is provided with a handrail for realizing the control of the carrier, the right side of the upper end of the frame is provided with a right lock frame, the left side of the upper end of the frame is provided with a left lock frame, the frame is close to the lower end and is sequentially provided with a first stop lever, a second stop lever, a third stop lever and a fourth stop lever from right to left, the right side of the front end of the frame is provided with a right wheel shaft, the left side of the front end of the frame is provided with a left wheel shaft, and the front end of the frame is sequentially and coaxially provided with a first overturning shaft, a second overturning shaft, a third overturning shaft and a fourth overturning shaft from right to left.

Preferably, a wheel is rotatably mounted on the left wheel shaft, a wheel is rotatably mounted on the right wheel shaft, the hydraulic pump is fixedly mounted on the rear side of the frame, the front end of the hydraulic pump is provided with a pressure release valve, a reversing valve and two oil ports, the rear end of the hydraulic pump is provided with a pedal, two universal casters are mounted on two sides of the rear end of the frame and used for supporting the balance of the carrier, a universal caster is mounted in the middle position of the rear end of the frame and used for supporting the hydraulic pump when the pedal is stepped on, the two wheels and the three universal casters are in contact with the ground together, and the carrier can freely move on the ground.

Preferably, the front side of the roll-over stand in the first clamping mechanism is provided with an arc surface structure, a layer of anti-static rubber is fixedly arranged on the arc surface, be used for increasing coefficient of friction and prevent to produce static, roll-over stand back upper end is equipped with the engaging lug, the awl inserted bar, first pivot, the second pivot, awl inserted bar top is the circular cone structure, the end circle diameter of circular cone structure is greater than awl inserted bar diameter, the roll-over stand back is close to vertical intermediate position and is equipped with left terminal axle, right-hand member axle, the third pivot, the fourth pivot, roll-over stand back both sides still are equipped with left baffle and right baffle, roll-over stand back lower extreme intermediate position is equipped with the fixed plate, back lower extreme left side is equipped with the board of turning left, be equipped with the round hole on the board of turning left, back lower extreme right side is equipped with the board of turning right, the round hole that is equipped with on the board of turning right and the round hole on the board of turning left, roll-over stand front side lower extreme both sides are equipped with left branch and right branch pole respectively.

Preferably, the round hole on the left turning plate of the turning frame in the first clamping mechanism is rotationally connected with the second turning shaft, and the round hole on the right turning plate is rotationally connected with the first turning shaft, so that the turning frame and the frame form a rotating pair, and the first clamping mechanism is rotationally arranged in front of the right side of the frame; a round hole on a left turning plate of the turning frame in the second clamping mechanism is rotationally connected with a fourth turning shaft, and a round hole on a right turning plate is rotationally connected with a third turning shaft, so that the turning frame in the second clamping mechanism and the frame form a revolute pair, and the second clamping mechanism is rotationally arranged in front of the left side of the frame; the front end of the left supporting rod is rotatably provided with a front supporting wheel, and the front end of the right supporting rod is rotatably provided with a front supporting wheel.

Preferably, the inner side of the clamping plate is an arc surface, a layer of anti-static rubber is arranged in the arc surface and used for increasing the friction coefficient and preventing static electricity, the left end of the first arm is rotatably provided with a clamping plate, the rotating center is positioned at the position, close to the upper end, of the back surface of the clamping plate, so that the clamping plate is always kept in a nearly vertical state under the action of self gravity, the right end of the first arm is provided with a first chain wheel and is coaxially and rotatably connected with a first rotating shaft, the right end of the second arm is rotatably provided with a clamping plate, the rotating center is positioned at the position, close to the upper end, of the back surface of the clamping plate, the left end of the second arm is provided with a second chain wheel and is coaxially and rotatably connected with a second rotating shaft, the left end of the third arm is rotatably provided with a clamping plate, the right end of the fourth arm is rotatably provided with a clamping plate, and the rotating center is positioned at the position close to the upper end of the back of the clamping plate, the left end of the fourth arm is provided with a fourth chain wheel and is coaxially and rotatably connected with a fourth rotating shaft, the first chain is of a closed circular ring structure and is matched and installed with the first chain wheel and the third chain wheel to form chain and chain wheel transmission, and the second chain is of a closed circular ring structure and is matched and installed with the second chain wheel and the fourth chain wheel to form chain and chain wheel transmission.

Preferably, the upper end of the ejector rod is fixedly connected with a chain link on the right side of the first chain and a chain link on the left side of the second chain, the ejector rod can simultaneously realize swinging motion of the first arm, the second arm, the third arm and the fourth arm after moving up and down, the upper end of the first spring is connected with the left side of the upper end of the ejector rod through a spring terminal, the lower end of the first spring is connected with a left terminal shaft through a spring terminal, the upper end of the second spring is connected with the right side of the upper end of the ejector rod through a spring terminal, the lower end of the second spring is connected with a right terminal shaft through a spring terminal, and the ejector rod always tends to move downwards under the tensile force action of the first spring and the second spring.

Preferably, the lower end of the hydraulic cylinder is fixedly connected with the fixing plate, the upper end of the hydraulic cylinder is fixedly connected with the lower end of the ejector rod, the first hydraulic pipe communicates one oil port at the front end of the hydraulic pump with the hydraulic cylinder in the first clamping mechanism, and the second hydraulic pipe communicates the other oil port at the front end of the hydraulic pump with the hydraulic cylinder in the second clamping mechanism.

Preferably, the locking plate structure comprises a locking plate, a left hook plate, a right hook plate, a left spring piece and a right spring piece, wherein the locking plate is provided with a bottom plate, a top plate, a left rotating shaft, a right rotating shaft and a limiting block, an upper end opening cavity structure is arranged between the bottom plate and the top plate, the limiting block is arranged at the middle position of the upper end of the cavity structure, a strip hole is formed in the center of the bottom plate, a round hole formed in the center of the top plate and the center of the strip hole in the bottom plate coincide, and the left rotating shaft and the right rotating shaft are further arranged between the bottom plate and the top plate.

Preferably, the right side of the upper end of the left hook plate is provided with an opening surface, the lower side of the opening surface is provided with a limiting surface, the lower side of the limiting surface is provided with an arc-shaped clamping edge, and the lower end of the left hook plate is provided with a spring surface; the right hook plate and the left hook plate are in bilateral symmetry, and the right hook plate is also provided with an opening surface, a limiting surface, a clamping edge and a spring surface.

Preferably, the lower end of the left hook plate is rotatably connected with the left rotating shaft, and the left spring piece is arranged between the spring surface at the lower end of the left hook plate and the bottom side of the inside of the lock plate, so that the left hook plate rotates rightwards under the action of the elasticity of the left spring piece until the limiting surface of the left hook plate presses the limiting block in the lock plate; the lower end of the right hook plate is rotatably connected with the right rotating shaft, and the right spring piece is installed between the spring surface at the lower end of the right hook plate and the bottom side inside the lock plate, so that the right hook plate rotates leftwards under the action of the elasticity of the right spring piece until the limiting surface of the right hook plate compresses a limiting block in the lock plate.

Preferably, the right lock frame is provided with a lock plate structure through screw fastening, and the left lock frame is provided with a lock plate structure through screw fastening.

Preferably, the right end of the swing rod is rotatably connected with the connecting lug to enable the swing rod to swing up and down, the right end of the pull ring rod is rotatably connected with the left end of the swing rod, a first rotating wheel and a second rotating wheel are arranged at positions, close to the middle, of the pull ring rod, the first rotating wheel and the second rotating wheel are symmetrically arranged on two sides of the pull ring rod and form a rotating pair with the pull ring rod, and the left end of the pull ring rod is provided with a pull ring convenient for holding and applying force.

The invention has the beneficial effects that:

one operator can load, transport and unload the oxygen cylinder, so that the labor resource is saved, the use is convenient, and the transport efficiency is high.

The two front supporting wheels are arranged on the front side of the turnover frame, the turnover frame can be translated in a vertical state in the oxygen cylinder loading process, the oxygen cylinder does not need to be inclined first, the possibility of the oxygen cylinder falling accident in the loading process is completely avoided, the safety is high, and the loading form is high in novelty.

The oxygen cylinder is convenient to unload and accurate in positioning, the oxygen cylinder can be directly placed at a target position, subsequent manual position adjustment is not needed, and the oxygen cylinder is convenient to use.

And anti-static rubber is arranged on the front side of the roll-over stand and the inner side of the clamping plate, so that the friction coefficient is increased, the clamping of the clamping plate on the oxygen cylinder is more stable, and combustion and explosion caused by static electricity can be prevented.

The locking device which is composed of the locking plate, the left hook plate, the right hook plate, the pull ring rod, the swing rod and the two spring pieces is novel in structure and stable in locking, and the pull ring structure is convenient for operators to operate and apply force in the overturning process of the overturning frame, so that the overturning frame is convenient to use.

The clamping to the oxygen cylinder is realized to the footboard realization that operating personnel accessible trampled the hydraulic pump, can realize the opening to the oxygen cylinder through trampling the relief valve, convenient operation to hydraulic drive has drive power big, and the motion is steady, advantages such as auto-lock is stable.

And the movement of each clamping plate is driven by one arm, and the ejector rod can simultaneously drive the swinging and rotating actions of the first arm, the second arm, the third arm and the fourth arm through two chains, so that the four clamping plates can simultaneously and symmetrically clamp the oxygen cylinder, and the clamping is safer and more stable.

The first clamping mechanism and the second clamping mechanism form a double-loading carrier, the carrying efficiency of the oxygen cylinder can be effectively improved, and the double-loading carrier can also be used for simultaneously carrying the oxygen cylinder and the acetylene cylinder in oxyacetylene welding.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic structural view of the roll-over stand portion when the first clamping mechanism releases the oxygen cylinder.

Fig. 4 is a schematic structural diagram of the roll-over stand part when the first clamping mechanism clamps the oxygen cylinder.

Fig. 5 is an enlarged partial cross-sectional view of the present invention.

Fig. 6 is a schematic view of the locking mechanism locking the roll stand.

Fig. 7 is a schematic view when the lock mechanism is open.

FIG. 8 is a schematic view of the awl bar after disengagement of the locking mechanism.

Fig. 9 is a schematic sectional view of the locking mechanism at the time of locking.

Fig. 10 is a schematic sectional view showing the lock mechanism when it is opened.

Fig. 11 is a schematic structural view of the vehicle frame.

Fig. 12 is a schematic structural view of the roll-over stand.

Fig. 13 is a schematic structural view of the drawbar.

Fig. 14 is a schematic structural view of the lock plate.

Fig. 15 is a schematic structural view of the left hook plate.

Reference numerals: 1 vehicle frame, 1.1 handrail, 1.2 right lock frame, 1.3 left lock frame, 1.4 first stop lever, 1.5 second stop lever, 1.6 third stop lever, 1.7 fourth stop lever, 1.8 right wheel axle, 1.9 first turning shaft, 1.10 second turning shaft, 1.11 third turning shaft, 1.12 fourth turning shaft, 1.13 left wheel axle, 2 wheels, 3 front supporting wheels, 4 hydraulic cylinders, 5 clamp plate, 6 fourth arm, 6.1 fourth chain wheel, 7 top rod, 8 second arm, 8.1 second chain wheel, 9 lock plate, 9.1 bottom plate, 9.2 top plate, 9.3 left rotating shaft, 9.4 right pressure relief valve rotating shaft, 9.5 limiting block, 10 turning frame, 10.1 connecting lug, 10.2 taper inserting rod, 10.3 first rotating shaft, 10.4 second rotating shaft, 10.5 left terminal shaft, 10.6 right terminal shaft, 10.6 third rotating shaft, 10.5 fourth rotating shaft, 10.10 turning frame, 10.1 connecting lug, 10.2 taper inserting rod, 10.3 first rotating shaft, 10.4 second rotating shaft, 10.5 left rotating shaft, 10.10 rotating shaft, 10.12 left rotating shaft, 10.12 left rotating shaft, 10.10.10.10 rotating shaft, 10.10.10 rotating shaft, 10 rotating shaft, 10.12 rotating shaft, 10.1 rotating shaft, 10.12 cylinder, 10 cylinder, 10.10.10.10 cylinder, 10 cylinder, 10.10 cylinder, 10.10.10 cylinder, 10 cylinder, 10.10.10, 10 cylinder, 10.10.10.10 cylinder, 10 cylinder, 10.10, 10.10.10.10 cylinder, 10 cylinder, 10 cylinder, 10 cylinder, 10.10.10 cylinder, 10 cylinder, 10.1 cylinder, 10.10.1 cylinder, 10 cylinder, 10 cylinder, 10.1 second rotating shaft, 10, 10.1 second rotating shaft, 10.1 cylinder, 10.1 second rotating shaft, 10, 10.1 second rotating shaft, 10.1 cylinder, 10.1 second rotating shaft, 10 cylinder, 10.1 cylinder, 10, 10.1 cylinder, 10 cylinder, 10, 10.1 second rotating shaft, 10, 10.1 cylinder, 10.1 second rotating shaft, 10.1 cylinder, 10, 10.1 second rotating shaft, 10, 10.1 cylinder, 10.1 second rotating shaft, 10, 10.1 second rotating, 12.3 reversing valves, 13 universal casters, 14.1 first hydraulic pipes, 14.2 second hydraulic pipes, 15 third arms, 15.1 third chain wheels, 16 first arms, 16.1 first chain wheels, 17 spring terminals, 18.1 first springs, 18.2 second springs, 19.1 first chains, 19.2 second chains, 20 swing rods, 21 pull ring rods, 21.1 first rotating wheels, 21.2 second rotating wheels, 21.3 pull rings, 22 left hook plates, 22.1 expanding surfaces, 22.2 limiting surfaces, 22.3 clamping edges, 22.4 spring surfaces, 23 right hook plates, 24.1 left spring plates and 24.2 right spring plates.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 and 2, a duplex medical oxygen cylinder carrier operated by one person comprises a frame mechanism, a first clamping mechanism, a second clamping mechanism and a locking mechanism, and is characterized in that: the frame mechanism comprises a frame 1, wheels 2, a hydraulic pump 12, universal casters 13, a first hydraulic pipe 14.1 and a second hydraulic pipe 14.2; the first clamping mechanism comprises a front supporting wheel 3, a hydraulic cylinder 4, a first arm 16, a second arm 8, a third arm 15, a fourth arm 6, a clamping plate 5, a mandril 7, a turnover frame 10, a spring terminal 17, a first spring 18.1, a second spring 18.2, a first chain 19.1 and a second chain 19.2, and the second clamping mechanism has the same structure as the first clamping mechanism; the locking mechanism comprises a locking plate structure, a swing rod 20 and a pull ring rod 21.

Two wheels 2 are respectively and rotatably arranged on two sides of a frame 1, three universal caster wheels 13 are arranged on the lower side of the rear end of the frame 1, a hydraulic pump 12 is fixedly arranged on the rear side of the frame 1, a first clamping mechanism is rotatably arranged in front of the right side of the frame 1, a second clamping mechanism is rotatably arranged in front of the left side of the frame 1, the left ends of a first arm 16 and a third arm 15 in the first clamping mechanism are respectively and rotatably provided with a clamping plate 5, the right ends are respectively and rotatably connected with a chain wheel and the back of a turning frame 10, a first chain 19.1 is matched and arranged with the two chain wheels at the right ends of the first arm 16 and the third arm 15, the right ends of a second arm 8 and a fourth arm 6 are respectively and rotatably provided with a clamping plate 5, the left ends are respectively and rotatably provided with a chain wheel and rotatably connected with the back of the turning frame 10, a second chain 19.2 is matched and arranged with the two chain wheels at the left ends of the second arm 8 and the fourth arm 6, and a hydraulic cylinder 4 is fixedly connected with the turning frame 10, the hydraulic cylinder 4 can drive the first chain 19.1 and the second chain 19.2 to rotate through the ejector rod 7 after being extended, so that the first arm 16, the second arm 8, the third arm 15 and the fourth arm 6 simultaneously swing downwards, the four clamp plates 5 in the first clamping mechanism clamp the oxygen cylinder 11, and after the thrust of the hydraulic cylinder 4 is unloaded, the ejector rod 7 can be pulled downwards by the first spring 18.1 and the second spring 18.2, so that the four clamp plates 5 in the first clamping mechanism release the oxygen cylinder 11.

The first hydraulic pipe 14.1 connects the hydraulic pump 12 with the hydraulic cylinder 4 in the first clamping mechanism, the second hydraulic pipe 14.2 connects the hydraulic pump 12 with the hydraulic cylinder in the second clamping mechanism, when the reversing valve 12.3 is pulled to the right, the hydraulic pump 12 can pressurize and release the hydraulic cylinder 4 in the first clamping mechanism, when the reversing valve 12.3 is pulled to the left, the hydraulic pump 12 can pressurize and release the hydraulic cylinder in the second clamping mechanism, the pedal 12.1 can extend the corresponding cylinder, the pedal relief valve 12.2 can unload the thrust of the corresponding hydraulic cylinder, a locking mechanism is installed on the upper end of the first clamping mechanism and the upper end of the second clamping mechanism, the locking mechanism can lock the corresponding roll-over stand close to the frame 1, the first clamping mechanism or the second clamping mechanism can make the two front supporting wheels 3 contact the ground after swinging forwards, this state is used for realizing the clamping and releasing process of the oxygen cylinder 11, first fixture and second fixture can realize the transportation to oxygen cylinder 11 after swinging backward and the locking.

As shown in fig. 1, 5 and 11, a handrail 1.1 is arranged at the middle position of the upper end of a frame 1 in a frame mechanism and used for realizing the control of a transport vehicle, a right lock frame 1.2 is arranged on the right side of the upper end of the frame 1, a left lock frame 1.3 is arranged on the left side of the upper end, a first stop lever 1.4, a second stop lever 1.5, a third stop lever 1.6 and a fourth stop lever 1.7 are sequentially arranged on the frame 1 close to the lower end from right to left, a right wheel shaft 1.8 is arranged on the right side of the front end of the frame 1, a left wheel shaft 1.13 is arranged on the left side of the front end, and a first turnover shaft 1.9, a second turnover shaft 1.10, a third turnover shaft 1.11 and a fourth turnover shaft 1.12 are sequentially and coaxially arranged on the front end of the frame 1 from right to left.

Rotate on the left side shaft 1.13 and install a wheel 2, rotate on the right side shaft 1.8 and install a

wheel

2, 12 fixed mounting in 1 rear side of frame of hydraulic pump, 12 front ends of hydraulic pump are equipped with relief valve 12.2, switching-over valve 12.3 and two hydraulic fluid ports, the rear end is equipped with footboard 12.1, two casters 13 are installed to 1 rear end both sides of frame, a caster 13 is installed for supporting the balance of carrier, 1 rear end intermediate position of frame, provide the support for hydraulic pump 12 when stepping on footboard 12.1, two wheels 2 and three caster 13 contact ground jointly, make the carrier can subaerial free movement.

As shown in fig. 3, 4, 5 and 12, the front side of the roll-over stand 10 of the first clamping mechanism is provided with a cambered surface structure, a layer of anti-static rubber is fixedly installed on the cambered surface structure for increasing the friction coefficient and preventing static electricity, the upper end of the back surface of the roll-over stand 10 is provided with a connecting lug 10.1, a conical insertion rod 10.2, a first rotating shaft 10.3 and a second rotating shaft 10.4, the top end of the conical insertion rod 10.2 is in a conical structure, the diameter of the bottom circle of the conical structure is larger than that of the conical insertion rod 10.2, the back surface of the roll-over stand 10 is provided with a left terminal shaft 10.5, a right terminal shaft 10.6, a third rotating shaft 10.7 and a fourth rotating shaft 10.8 near the longitudinal middle position, the two sides of the back surface of the roll-over stand 10 are also provided with a left baffle 10.9 and a right baffle 10.10, the middle position of the back surface of the roll-over stand 10 is provided with a fixed plate 10.13, the left rotating plate 10.14 is arranged on the left rotating plate 10.14, the left rotating plate is provided with a round, two sides of the lower end of the front side of the roll-over stand 10 are respectively provided with a left supporting rod 10.15 and a right supporting rod 10.12.

A round hole on a left turning plate 10.14 of the turning frame 10 in the first clamping mechanism is rotationally connected with a second turning shaft 1.10, and a round hole on a right turning plate 10.11 is rotationally connected with a first turning shaft 1.9, so that the turning frame 10 and the frame 1 form a revolute pair, and the first clamping mechanism is rotationally arranged in front of the right side of the frame 1; a round hole on a left rotating plate of the roll-over stand in the second clamping mechanism is rotationally connected with a fourth roll-over shaft 1.12, and a round hole on a right rotating plate is rotationally connected with a third roll-over shaft 1.11, so that the roll-over stand in the second clamping mechanism and the frame 1 form a revolute pair, and the second clamping mechanism is rotationally arranged in front of the left side of the frame 1; the front end of the left supporting rod 10.15 is rotatably provided with a front supporting wheel 3, and the front end of the right supporting rod 10.12 is rotatably provided with a front supporting wheel 3.

The inner side of the clamping plate 5 is an arc surface, a layer of anti-static rubber is arranged in the arc surface and used for increasing the friction coefficient and preventing static electricity, the left end of the first arm 16 is rotatably provided with the clamping plate 5, the rotating center is positioned at the position, close to the upper end, of the back surface of the clamping plate 5, so that the clamping plate 5 is always kept in a state close to the vertical state under the action of self gravity, the right end of the first arm 16 is provided with a first chain wheel 16.1 and is coaxially and rotatably connected with a first rotating shaft 10.3, the right end of the second arm 8 is rotatably provided with the clamping plate 5, the rotating center is positioned at the position, close to the upper end, of the back surface of the clamping plate 5, the left end of the second arm 8 is provided with a second chain wheel 8.1 and is coaxially and rotatably connected with a second rotating shaft 10.4, the left end of the third arm 15 is rotatably provided with the clamping plate 5, the rotating center is positioned at the position, close to the upper end, the right end of the third arm 15 is provided with a third chain wheel 15.1 and is coaxially and is rotatably connected with a third rotating shaft 10.7, a splint 5 is installed in the rotation of the 6 right-hand members of fourth arm, and the center of rotation is located the splint 5 back and is close to the upper end position, and the 6 left end of fourth arm is provided with fourth sprocket 6.1 and is connected with the coaxial rotation of fourth pivot 10.8, and first chain 19.1 constitutes chain sprocket drive for sealing the ring structure and with first sprocket 16.1 and the cooperation installation of third sprocket 15.1, and second chain 19.2 constitutes chain sprocket drive for sealing the ring structure and with the cooperation installation of second sprocket 8.1 and fourth sprocket 6.1.

The upper end of the ejector rod 7 is fixedly connected with a chain link on the right side of the first chain 19.1 and a chain link on the left side of the second chain 19.2, so that the swinging motion of the first arm 16, the second arm 8, the third arm 15 and the fourth arm 6 can be realized simultaneously after the ejector rod 7 moves up and down, the upper end of the first spring 18.1 is connected with the left side of the upper end of the ejector rod 7 through a spring terminal 17, the lower end of the first spring 18.1 is connected with the left terminal shaft 10.5 through a spring terminal 17, the upper end of the second spring 18.2 is connected with the right side of the upper end of the ejector rod 7 through a spring terminal 17, the lower end of the second spring 18.2 is connected with the right terminal shaft 10.6 through a spring terminal 17, and the ejector rod 7 always tends to move downwards under the pulling force of the first spring 18.1 and the second spring 18.2.

The lower end of the hydraulic cylinder 4 is fixedly connected with the fixing plate 10.13, the upper end of the hydraulic cylinder 4 is fixedly connected with the lower end of the ejector rod 7, one oil port at the front end of the hydraulic pump 12 is communicated with the hydraulic cylinder 4 in the first clamping mechanism through a first hydraulic pipe 14.1, and the other oil port at the front end of the hydraulic pump 12 is communicated with the hydraulic cylinder in the second clamping mechanism through a second hydraulic pipe 14.2.

As shown in fig. 9 and 14, the lock plate structure includes a lock plate 9, a left hook plate 22, a right hook plate 23, a left spring leaf 24.1, and a right spring leaf 24.2, the lock plate 9 is provided with a bottom plate 9.1, a top plate 9.2, a left rotation shaft 9.3, a right rotation shaft 9.4, and a stopper 9.5, wherein a cavity structure with an open upper end is provided between the bottom plate 9.1 and the top plate 9.2, the stopper 9.5 is provided at the middle position of the upper end of the cavity structure, a long hole is provided at the center of the bottom plate 9.1, a circular hole provided at the center of the top plate 9.2 coincides with the center of the long hole on the bottom plate 9.1, and a left rotation shaft 9.3 and a right rotation shaft 9.4 are further provided between the bottom plate 9.1 and the top plate 9.2.

As shown in fig. 15, an opening surface 22.1 is arranged on the right side of the upper end of the left hook plate 22, a limiting surface 22.2 is arranged on the lower side of the opening surface 22.1, an arc-shaped clamping edge 22.3 is arranged on the lower side of the limiting surface 22.2, and a spring surface 22.4 is arranged on the lower end of the left hook plate 22; the right hook plate 23 and the left hook plate 22 are bilaterally symmetrical, and the right hook plate 23 is also provided with an opening surface, a limiting surface, a clamping edge and a spring surface.

As shown in fig. 9, the lower end of the left hook plate 22 is rotatably connected with the left rotating shaft 9.3, and the left spring leaf 24.1 is installed between the spring face 22.4 at the lower end of the left hook plate 22 and the bottom side of the inside of the lock plate 9, so that the left hook plate 22 rotates rightwards under the action of the elastic force of the left spring leaf 24.1 until the limiting face 22.2 of the left hook plate 22 presses the limiting block 9.5 in the lock plate 9; the lower end of the right hook plate 23 is rotatably connected with the right rotating shaft 9.4, and the right spring piece 24.2 is arranged between the spring surface at the lower end of the right hook plate 23 and the bottom side inside the lock plate 9, so that the right hook plate 23 rotates leftwards under the action of the elastic force of the right spring piece 24.2 until the limiting surface of the right hook plate 23 compresses the limiting block 9.5 in the lock plate 9.

As shown in fig. 6 and 7, a lock plate structure is fastened and mounted on the right lock frame 1.2 through screws, and a lock plate structure is fastened and mounted on the left lock frame 1.3 through screws.

As shown in fig. 13, the right end of the swing link 20 is rotatably connected with the connecting lug 10.1, so that the swing link 20 can swing up and down, the right end of the pull ring rod 21 is rotatably connected with the left end of the swing link 20, the pull ring rod 21 is provided with a first rotating wheel 21.1 and a second rotating wheel 21.2 near the middle position, the first rotating wheel 21.1 and the second rotating wheel 21.2 are symmetrically arranged at two sides of the pull ring rod 21 and form a rotating pair with the pull ring rod 21, and the left end of the pull ring rod 21 is provided with a pull ring 21.3 convenient for holding and applying force.

As shown in fig. 1, 3, 6, and 9, in the initial state: the first clamping mechanism inclines backwards and abuts against the frame 1, the left baffle 10.9 presses the second baffle 1.5, the right baffle 10.10 presses the first baffle 1.4, the conical insertion rod 10.2 penetrates through a gap between the left hook plate 22 and the right hook plate 23 through a strip hole on the bottom plate 9.1, and the clamping edge 22.3 of the left hook plate 22 and the clamping edge of the right hook plate 23 clamp the bottom circle of the conical structure, so that the position locking of the first clamping mechanism is realized; the second clamping mechanism leans backwards to abut against the frame 1, the position of the second clamping mechanism is locked by a set of locking mechanism, and a left baffle and a right baffle of the roll-over stand in the second clamping mechanism respectively press a fourth baffle rod 1.7 and a third baffle rod 1.6; the pressure release valve 12.2 is in a closed state, hydraulic cylinders in the first clamping mechanism and the second clamping mechanism are in a contracted state, ejector rods 7 in the first clamping mechanism and the second clamping mechanism are in the lowest positions, and the four clamping plates 5 are all opened outwards; the first runner 21.1 and the second runner 21.2 are arranged longitudinally and are placed between the opening surface 22.1 of the left hook plate 22 and the opening surface of the right hook plate 23.

As shown in fig. 2, 4, 5, 6, 9, and 10, when the first clamp mechanism is loaded with the oxygen cylinder 11:

firstly, a user holds a pull ring 21.3 by hand and rotates 90 degrees, so that a first rotating wheel 21.1 and a second rotating wheel 21.2 are in a transverse row state and respectively prop open a left hook plate 22 and a right hook plate 23 to two sides, namely, the left hook plate 22 rotates leftwards and the right hook plate 23 rotates rightwards, and a clamping edge 22.3 of the left hook plate 22 and a clamping edge of the right hook plate 23 release clamping of a conical structure on a conical insertion rod 10.2;

secondly, the pull ring 21.3 is pushed forwards to enable the conical insertion rod 10.2 to be separated from the lock plate 9, the first rotating wheel 21.1 and the second rotating wheel 21.2 are separated from the contact with the left hook plate 22 and the right hook plate 23, then the left hook plate 22 rotates rightwards under the action of the elasticity of the left spring piece 24.1 until the limiting surface 22.2 of the left hook plate 22 compresses a limiting block 9.5 in the lock plate 9, and the right hook plate 23 rotates leftwards under the action of the elasticity of the right spring piece 24.2 until the limiting surface of the right hook plate 23 compresses the limiting block 9.5;

thirdly, the roll-over stand 10 is rotated forwards until the roll-over stand becomes a vertical state, at the moment, the two front supporting wheels 3 contact the ground, the carrier is pushed forwards, and the oxygen cylinder 11 contacts the cambered surface structure on the front side of the roll-over stand 10;

fourthly, the reversing valve 12.3 is pulled rightwards, so that the hydraulic pump 12 is communicated with the hydraulic cylinder 4 in the first clamping mechanism through the first hydraulic pipe 14.1, and meanwhile, the communication between the hydraulic pump 12 and the hydraulic cylinder in the second clamping mechanism is cut off;

repeatedly stepping down the pedal 12.1 to enable the hydraulic oil in the hydraulic pump 12 to enter the hydraulic cylinder 4 through the first hydraulic pipe 14.1 to enable the hydraulic cylinder to extend gradually, so that the ejector rod 7 moves upwards to enable the first chain 19.1 to rotate anticlockwise and the second chain 19.2 to rotate clockwise, and the first arm 16, the second arm 8, the third arm 15 and the fourth arm 6 simultaneously swing downwards until the four clamping plates 5 clamp the oxygen cylinder 11;

sixthly, pulling the pull ring 21.3 backwards to enable the roll-over stand 10 to turn over backwards until the cone insertion rod 10.2 is inserted into the locking mechanism and then locked;

seventhly, the pull ring 21.3 is rotated by 90 degrees, so that the first rotating wheel 21.1 and the second rotating wheel 21.2 are arranged longitudinally and are placed between the opening surface 22.1 of the left hook plate 22 and the opening surface of the right hook plate 23; so that the two front wheels leave the ground, the two wheels 2 and the three universal casters 13 contact the ground, and the first clamping mechanism finishes loading the oxygen cylinder 11;

when the second clamping mechanism loads the oxygen cylinder, the reversing valve 12.3 in the fourth step needs to be pulled leftwards, so that the hydraulic pump 12 is communicated with the hydraulic cylinder in the second clamping mechanism through the second hydraulic pipe 14.2, meanwhile, the communication between the hydraulic pump 12 and the hydraulic cylinder in the first clamping mechanism is cut off, and other process steps are the same as the loading process of the first clamping mechanism; when the first clamping mechanism and the second clamping mechanism are both in a locking state, the carrier can be moved to a target position.

As shown in fig. 2, 3, 5, 7, 8, 9, and 10, when the first clamp mechanism unloads the oxygen cylinder 11:

firstly, holding the pull ring 21.3 by hand and rotating for 90 degrees to enable the first rotating wheel 21.1 and the second rotating wheel 21.2 to be in a transverse arrangement state and respectively prop open the left hook plate 22 and the right hook plate 23 to two sides, and then releasing the clamping of the clamping edge 22.3 of the left hook plate 22 and the clamping edge of the right hook plate 23 on the conical structure on the conical insertion rod 10.2;

secondly, the pull ring 21.3 is pushed forwards to enable the conical insertion rod 10.2 to be separated from the lock plate 9;

thirdly, the roll-over stand 10 is rotated forwards until the roll-over stand becomes vertical, at the moment, the two front supporting wheels 3 contact the ground, and the bottom end of the oxygen cylinder 11 also contacts the ground;

after the pressure release valve 12.2 is stepped downwards, the ejector rod 7 moves downwards under the tension of the first spring 18.1 and the second spring 18.2, the hydraulic cylinder 4 contracts, hydraulic oil in the hydraulic cylinder 4 flows back to the hydraulic pump 12, meanwhile, the first chain 19.1 rotates clockwise, the second chain 19.2 rotates anticlockwise, the first arm 16, the second arm 8, the third arm 15 and the fourth arm 6 simultaneously swing upwards, the opening of the four clamping plates 5 is realized, and the unloading of the oxygen cylinder 11 in the first clamping mechanism can be finished by pulling the carrying vehicle backwards;

when the second clamping mechanism unloads the oxygen cylinder, the reversing valve 12.3 in the fourth step needs to be pulled leftwards, so that the hydraulic pump 12 is communicated with the hydraulic cylinder in the second clamping mechanism through the second hydraulic pipe 14.2, meanwhile, the communication between the hydraulic pump 12 and the hydraulic cylinder in the first clamping mechanism is cut off, and other process steps are the same as the unloading process of the first clamping mechanism.

The references to "front", "back", "left", "right", etc., are to be construed as references to orientations or positional relationships based on the orientation or positional relationship shown in the drawings or as orientations and positional relationships conventionally found in use of the product of the present invention, and are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Claims

1. The utility model provides a medical oxygen cylinder carrier of pair of one-man operation, includes frame mechanism, first fixture, second fixture, locking mechanism, its characterized in that: the frame mechanism comprises a frame (1), wheels (2), a hydraulic pump (12), universal casters (13), a first hydraulic pipe (14.1) and a second hydraulic pipe (14.2); the first clamping mechanism comprises a front supporting wheel (3), a hydraulic cylinder (4), a first arm (16), a second arm (8), a third arm (15), a fourth arm (6), a clamping plate (5), a push rod (7), a turning frame (10), a spring terminal (17), a first spring (18.1), a second spring (18.2), a first chain (19.1) and a second chain (19.2), and the second clamping mechanism is the same as the first clamping mechanism in structure; the locking mechanism comprises a locking plate structure, a swing rod (20) and a pull ring rod (21);

two wheels (2) are respectively rotatably arranged at two sides of a frame (1), three universal casters (13) are arranged at the lower side of the rear end of the frame (1), a hydraulic pump (12) is fixedly arranged at the rear side of the frame (1), a first clamping mechanism is rotatably arranged at the front of the right side of the frame (1), a second clamping mechanism is rotatably arranged at the front of the left side of the frame (1), a clamping plate (5) is respectively rotatably arranged at the left ends of a first arm (16) and a third arm (15) in the first clamping mechanism, a chain wheel is respectively arranged at the right end and is respectively rotatably connected with the back of a roll-over stand (10), a first chain (19.1) is matched with the two chain wheels at the right ends of the first arm (16) and the third arm (15), a clamping plate (5) is respectively rotatably arranged at the right ends of a second arm (8) and a fourth arm (6), a chain wheel is respectively arranged at the left end and is rotatably connected with the back of the roll-over stand (10), the second chain (19.2) is installed with the two chain wheels at the left ends of the second arm (8) and the fourth arm (6) in a matched mode, the hydraulic cylinder (4) is fixedly connected with the turnover frame (10), the hydraulic cylinder (4) can drive the first chain (19.1) and the second chain (19.2) to rotate through the ejector rod (7) after being extended, so that the first arm (16), the second arm (8), the third arm (15) and the fourth arm (6) simultaneously swing downwards, the four clamp plates (5) in the first clamping mechanism clamp the oxygen cylinder (11), and after the thrust of the hydraulic cylinder (4) is unloaded, the ejector rod (7) can be pulled downwards by the first spring (18.1) and the second spring (18.2) to enable the four clamp plates (5) in the first clamping mechanism to release clamping of the oxygen cylinder (11);

the hydraulic pump (12) is communicated with the hydraulic cylinder (4) in the first clamping mechanism by the first hydraulic pipe (14.1), the hydraulic pump (12) is communicated with the hydraulic cylinder in the second clamping mechanism by the second hydraulic pipe (14.2), when the reversing valve (12.3) is pulled rightwards, the hydraulic pump (12) can pressurize and release the hydraulic cylinder (4) in the first clamping mechanism, when the reversing valve (12.3) is pulled leftwards, the hydraulic pump (12) can pressurize and release the hydraulic cylinder in the second clamping mechanism, the corresponding oil cylinder can be extended by stepping the pedal (12.1), the thrust of the corresponding hydraulic cylinder can be removed by stepping the pressure release valve (12.2), the upper ends of the first clamping mechanism and the second clamping mechanism are both provided with a locking mechanism, the locking mechanism can lock the corresponding turnover frame close to the frame (1), and the first clamping mechanism or the second clamping mechanism can make the two front supporting wheels (3) contact the ground after swinging forwards, the state is used for realizing the clamping and releasing processes of the oxygen cylinder (11), and the first clamping mechanism and the second clamping mechanism swing backwards and can realize the transfer of the oxygen cylinder (11) after being locked.

2. The one-man operated duplex medical oxygen cylinder cart of claim 1, further comprising: a handrail (1.1) is arranged in the middle of the upper end of a frame (1) in the frame mechanism and used for realizing control of a carrier, a right lock frame (1.2) is arranged on the right side of the upper end of the frame (1), a left lock frame (1.3) is arranged on the left side of the upper end of the frame (1), a first stop lever (1.4), a second stop lever (1.5), a third stop lever (1.6) and a fourth stop lever (1.7) are sequentially arranged on the frame (1) close to the lower end from right to left, a right wheel shaft (1.8) is arranged on the right side of the front end of the frame (1), a left wheel shaft (1.13) is arranged on the left side of the front end of the frame (1), and a first turnover shaft (1.9), a second turnover shaft (1.10), a third turnover shaft (1.11) and a fourth turnover shaft (1.12) are sequentially and coaxially arranged on the front end of the frame (1) from right to left;

rotate on left side shaft (1.13) and install one wheel (2), rotate on right side shaft (1.8) and install one wheel (2), hydraulic pump (12) fixed mounting is in frame (1) rear side, hydraulic pump (12) front end is equipped with relief valve (12.2), switching-over valve (12.3) and two hydraulic fluid ports, the rear end is equipped with footboard (12.1), two universal caster (13) are installed to frame (1) rear end both sides, a universal caster (13) are installed to the balance for supporting the carrier, frame (1) rear end intermediate position, for providing the support for hydraulic pump (12) when stepping on footboard (12.1), two wheels (2) and three universal caster (13) contact ground jointly, make the carrier can freely remove on the ground.

3. The one-man operated duplex medical oxygen cylinder cart of claim 1, further comprising: the front side of a roll-over stand (10) in the first clamping mechanism is provided with a cambered surface structure, a layer of anti-static rubber is fixedly arranged on the cambered surface and used for increasing the friction coefficient and preventing static electricity, the upper end of the back side of the roll-over stand (10) is provided with a connecting lug (10.1), a cone inserted bar (10.2), a first rotating shaft (10.3) and a second rotating shaft (10.4), the top end of the cone inserted bar (10.2) is of a cone structure, the diameter of the base circle of the cone structure is larger than that of the cone inserted bar (10.2), the back side of the roll-over stand (10) is provided with a left terminal shaft (10.5), a right terminal shaft (10.6), a third rotating shaft (10.7) and a fourth rotating shaft (10.8) near the longitudinal middle position, the left baffle (10.9) and a right baffle (10.10) are further arranged on two sides of the back side of the roll-over stand (10), a fixing plate (10.13) is arranged at the middle position of the lower end of the back side of the roll-over stand (10), the left rotating plate (10) is provided with a left rotating plate (10.14), and a round hole is arranged on the left rotating plate (10.14), a right rotating plate (10.11) is arranged on the right side of the lower end of the back surface, a round hole arranged on the right rotating plate (10.11) is coaxial with a round hole on the left rotating plate (10.14), and a left support rod (10.15) and a right support rod (10.12) are respectively arranged on two sides of the lower end of the front side of the roll-over stand (10);

a round hole on a left turning plate (10.14) of a turning frame (10) in a first clamping mechanism is rotationally connected with a second turning shaft (1.10), a round hole on a right turning plate (10.11) is rotationally connected with a first turning shaft (1.9), so that the turning frame (10) and a frame (1) form a revolute pair, and the first clamping mechanism is rotationally arranged in front of the right side of the frame (1); a round hole on a left turning plate of the turning frame in the second clamping mechanism is rotationally connected with a fourth turning shaft (1.12), and a round hole on a right turning plate is rotationally connected with a third turning shaft (1.11), so that the turning frame in the second clamping mechanism and the frame (1) form a revolute pair, and the second clamping mechanism is rotationally arranged in front of the left side of the frame (1); the front end of the left support rod (10.15) is rotatably provided with a front supporting wheel (3), and the front end of the right support rod (10.12) is rotatably provided with a front supporting wheel (3);

the inner side of the clamping plate (5) is an arc surface, a layer of anti-static rubber is arranged in the arc surface and used for increasing the friction coefficient and preventing static electricity, the left end of the first arm (16) is rotatably provided with the clamping plate (5), the rotating center is positioned at the position, close to the upper end, of the back surface of the clamping plate (5) so that the clamping plate (5) is always kept in a nearly vertical state under the action of self gravity, the right end of the first arm (16) is provided with a first chain wheel (16.1) and is coaxially and rotatably connected with a first rotating shaft (10.3), the right end of the second arm (8) is rotatably provided with the clamping plate (5), the rotating center is positioned at the position, close to the upper end, the left end of the second arm (8) is provided with a second chain wheel (8.1) and is coaxially and rotatably connected with a second rotating shaft (10.4), the left end of the third arm (15) is rotatably provided with the clamping plate (5), and the rotating center is positioned at the position, close to the upper end, of the back surface of the clamping plate (5), a third chain wheel (15.1) is arranged at the right end of the third arm (15) and is coaxially and rotatably connected with a third rotating shaft (10.7), a clamping plate (5) is rotatably arranged at the right end of the fourth arm (6), the rotating center is positioned at the position, close to the upper end, of the back surface of the clamping plate (5), a fourth chain wheel (6.1) is arranged at the left end of the fourth arm (6) and is coaxially and rotatably connected with a fourth rotating shaft (10.8), a first chain (19.1) is of a closed circular ring structure and is matched and installed with the first chain wheel (16.1) and the third chain wheel (15.1) to form chain and chain wheel transmission, and a second chain (19.2) is of a closed circular ring structure and is matched and installed with the second chain wheel (8.1) and the fourth chain wheel (6.1) to form chain and chain wheel transmission;

the upper end of the mandril (7) is fixedly connected with one chain link at the right side of the first chain (19.1) and one chain link at the left side of the second chain (19.2), thereby the swing and rotation actions of the first arm (16), the second arm (8), the third arm (15) and the fourth arm (6) can be simultaneously realized after the ejector rod (7) moves up and down, the upper end of the first spring (18.1) is connected with the left side of the upper end of the ejector rod (7) through a spring terminal (17), the lower end of the first spring (18.1) is connected with the left terminal shaft (10.5) through a spring terminal (17), the upper end of the second spring (18.2) is connected with the right side of the upper end of the ejector rod (7) through a spring terminal (17), the lower end of the second spring (18.2) is connected with the right terminal shaft (10.6) through a spring terminal (17), therefore, under the action of the pulling force of the first spring (18.1) and the second spring (18.2), the ejector rod (7) always has the tendency of moving downwards;

the lower end of the hydraulic cylinder (4) is fixedly connected with the fixing plate (10.13), the upper end of the hydraulic cylinder (4) is fixedly connected with the lower end of the ejector rod (7), one oil port at the front end of the hydraulic pump (12) is communicated with the hydraulic cylinder (4) in the first clamping mechanism through a first hydraulic pipe (14.1), and the other oil port at the front end of the hydraulic pump (12) is communicated with the hydraulic cylinder in the second clamping mechanism through a second hydraulic pipe (14.2).

4. The one-man operated duplex medical oxygen cylinder cart of claim 1, further comprising: the lock plate structure comprises a lock plate (9), a left hook plate (22), a right hook plate (23), a left spring piece (24.1) and a right spring piece (24.2), wherein a bottom plate (9.1), a top plate (9.2), a left rotating shaft (9.3), a right rotating shaft (9.4) and a limiting block (9.5) are arranged on the lock plate (9), a cavity structure with an opening at the upper end is arranged between the bottom plate (9.1) and the top plate (9.2), the limiting block (9.5) is arranged in the middle of the upper end of the cavity structure, a long hole is arranged in the center of the bottom plate (9.1), a round hole arranged in the center of the top plate (9.2) is overlapped with the center of the long hole in the bottom plate (9.1), and a left rotating shaft (9.3) and a right rotating shaft (9.4) are also arranged between the bottom plate (9.1) and the top plate (9.2);

an opening surface (22.1) is arranged on the right side of the upper end of the left hook plate (22), a limiting surface (22.2) is arranged on the lower side of the opening surface (22.1), an arc-shaped clamping edge (22.3) is arranged on the lower side of the limiting surface (22.2), and a spring surface (22.4) is arranged at the lower end of the left hook plate (22); the structure of the right hook plate (23) is bilaterally symmetrical with the left hook plate (22), and the right hook plate (23) is also provided with an opening surface, a limiting surface, a clamping edge and a spring surface;

the lower end of the left hook plate (22) is rotatably connected with the left rotating shaft (9.3), and a left spring piece (24.1) is arranged between a spring surface (22.4) at the lower end of the left hook plate (22) and the bottom side inside the lock plate (9), so that the left hook plate (22) rotates rightwards under the action of the elasticity of the left spring piece (24.1) until a limiting surface (22.2) of the left hook plate (22) presses a limiting block (9.5) in the lock plate (9); the lower end of the right hook plate (23) is rotatably connected with the right rotating shaft (9.4), and the right spring piece (24.2) is arranged between the spring surface at the lower end of the right hook plate (23) and the bottom side of the inside of the lock plate (9), so that the right hook plate (23) rotates leftwards under the action of the elasticity of the right spring piece (24.2) until the limiting surface of the right hook plate (23) presses the limiting block (9.5) in the lock plate (9);

a locking plate structure is fixedly arranged on the right locking frame (1.2) through a screw, and a locking plate structure is fixedly arranged on the left locking frame (1.3) through a screw;

the right end of the swing rod (20) is rotatably connected with the connecting lug (10.1) to enable the swing rod (20) to swing up and down, the right end of the pull ring rod (21) is rotatably connected with the left end of the swing rod (20), a first rotating wheel (21.1) and a second rotating wheel (21.2) are arranged at the position, close to the middle, of the pull ring rod (21), the first rotating wheel (21.1) and the second rotating wheel (21.2) are symmetrically arranged on the two sides of the pull ring rod (21) and form a rotating pair with the pull ring rod (21), and a pull ring (21.3) convenient for holding and applying force is arranged at the left end of the pull ring rod (21).

5. The one-man operated duplex medical oxygen cylinder cart of claim 1, further comprising: in the initial state: the first clamping mechanism inclines backwards and abuts against the frame (1), the left baffle (10.9) compresses the second stop lever (1.5), the right baffle (10.10) compresses the first stop lever (1.4), the conical insertion rod (10.2) penetrates through a gap between the left hook plate (22) and the right hook plate (23) through a long hole on the bottom plate (9.1), and the clamping edge (22.3) of the left hook plate (22) and the clamping edge of the right hook plate (23) clamp the bottom circle of the conical structure, so that the position locking of the first clamping mechanism is realized; the second clamping mechanism leans backwards to abut against the frame (1), and the position of the second clamping mechanism is locked by a set of locking mechanism, and at the moment, a left baffle and a right baffle of the roll-over stand in the second clamping mechanism respectively press a fourth baffle rod (1.7) and a third baffle rod (1.6); the pressure release valve (12.2) is in a closed state, hydraulic cylinders in the first clamping mechanism and the second clamping mechanism are in a contracted state, ejector rods (7) in the first clamping mechanism and the second clamping mechanism are in the lowest positions, and the four clamping plates (5) are all opened outwards; the first rotating wheel (21.1) and the second rotating wheel (21.2) are arranged longitudinally and are placed between the opening surface (22.1) of the left hook plate (22) and the opening surface of the right hook plate (23).

6. The one-man operated duplex medical oxygen cylinder cart of claim 1, further comprising: when the first clamping mechanism loads the oxygen cylinder (11):

firstly, holding the pull ring (21.3) by hand and rotating for 90 degrees to enable the first rotating wheel (21.1) and the second rotating wheel (21.2) to be in a horizontal row state and respectively prop open the left hook plate (22) and the right hook plate (23) to two sides, namely, the left hook plate (22) rotates leftwards and the right hook plate (23) rotates rightwards, so that the clamping edge (22.3) of the left hook plate (22) and the clamping edge of the right hook plate (23) release the clamping of a conical structure on the conical insertion rod (10.2);

secondly, the pull ring (21.3) is pushed forwards to enable the conical insertion rod (10.2) to be separated from the lock plate (9), the first rotating wheel (21.1) and the second rotating wheel (21.2) are separated from the contact with the left hook plate (22) and the right hook plate (23), then the left hook plate (22) rotates rightwards under the action of the elasticity of the left spring piece (24.1) until the limiting surface (22.2) of the left hook plate (22) presses the limiting block (9.5) in the lock plate (9), and the right hook plate (23) rotates leftwards under the action of the elasticity of the right spring piece (24.2) until the limiting surface of the right hook plate (23) presses the limiting block (9.5);

the roll-over stand (10) is rotated forwards until the roll-over stand is in a vertical state, at the moment, the two front supporting wheels (3) contact the ground, the carrier is pushed forwards, and the oxygen cylinder (11) is in contact with the cambered surface structure on the front side of the roll-over stand (10);

fourthly, the reversing valve (12.3) is pulled rightwards, so that the hydraulic pump (12) is communicated with the hydraulic cylinder (4) in the first clamping mechanism through the first hydraulic pipe (14.1), and meanwhile, the communication between the hydraulic pump (12) and the hydraulic cylinder in the second clamping mechanism is cut off;

repeatedly stepping down the pedal (12.1) to enable hydraulic oil in the hydraulic pump (12) to enter the hydraulic cylinder (4) through the first hydraulic pipe (14.1) to extend gradually, so that the ejector rod (7) moves upwards to enable the first chain (19.1) to rotate anticlockwise and the second chain (19.2) to rotate clockwise, and the first arm (16), the second arm (8), the third arm (15) and the fourth arm (6) simultaneously swing downwards until the four clamping plates (5) clamp the oxygen cylinder (11);

sixthly, pulling the pull ring (21.3) backwards to enable the roll-over stand (10) to turn over backwards until the conical insertion rod (10.2) is inserted into the locking mechanism and then locked;

seventhly, the pull ring (21.3) is rotated by 90 degrees, so that the first rotating wheel (21.1) and the second rotating wheel (21.2) are arranged longitudinally and are placed between the opening surface (22.1) of the left hook plate (22) and the opening surface of the right hook plate (23); so that the two front supporting wheels leave the ground, the two wheels (2) and the three universal caster wheels (13) contact the ground, and the first clamping mechanism finishes loading the oxygen cylinder (11);

when the second clamping mechanism loads the oxygen cylinder, the reversing valve (12.3) in the fourth step needs to be pulled leftwards, so that the hydraulic pump (12) is communicated with the hydraulic cylinder in the second clamping mechanism through a second hydraulic pipe (14.2), meanwhile, the communication between the hydraulic pump (12) and the hydraulic cylinder in the first clamping mechanism is cut off, and other process steps are the same as the loading process of the first clamping mechanism; when the first clamping mechanism and the second clamping mechanism are both in a locking state, the carrier can be moved to a target position.

7. The one-man operated duplex medical oxygen cylinder cart of claim 1, further comprising: when the first clamping mechanism unloads the oxygen cylinder (11):

firstly, holding the pull ring (21.3) by hand and rotating for 90 degrees to enable the first rotating wheel (21.1) and the second rotating wheel (21.2) to be in a transverse arrangement state and respectively prop open the left hook plate (22) and the right hook plate (23) towards two sides, and then releasing the clamping of the clamping edge (22.3) of the left hook plate (22) and the clamping edge of the right hook plate (23) on the conical structure on the conical insertion rod (10.2);

secondly, the pull ring (21.3) is pushed forwards to enable the conical insertion rod (10.2) to be separated from the lock plate (9);

the overturning frame (10) is rotated forwards until the overturning frame becomes a vertical state, at the moment, the two front supporting wheels (3) contact the ground, and the bottom end of the oxygen cylinder (11) also contacts the ground;

after the pressure release valve (12.2) is stepped downwards, the ejector rod (7) moves downwards under the tensile force of the first spring (18.1) and the second spring (18.2), the hydraulic cylinder (4) contracts, hydraulic oil in the hydraulic cylinder (4) flows back to the hydraulic pump (12), meanwhile, the first chain (19.1) rotates clockwise, the second chain (19.2) rotates anticlockwise, the first arm (16), the second arm (8), the third arm (15) and the fourth arm (6) simultaneously swing upwards to realize the opening of the four clamping plates (5), and the unloading of the oxygen bottle (11) in the first clamping mechanism can be finished by pulling the transport vehicle backwards;

when the second clamping mechanism unloads the oxygen cylinder, the reversing valve (12.3) in the fourth step needs to be pulled leftwards, so that the hydraulic pump (12) is communicated with the hydraulic cylinder in the second clamping mechanism through the second hydraulic pipe (14.2), meanwhile, the communication between the hydraulic pump (12) and the hydraulic cylinder in the first clamping mechanism is cut off, and other process steps are the same as the unloading process of the first clamping mechanism.