CN110342421B - Oil pump with rapid lifting function and method - Google Patents
Oil pump with rapid lifting function and method Download PDFInfo
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- CN110342421B CN110342421B CN201910727857.6A CN201910727857A CN110342421B CN 110342421 B CN110342421 B CN 110342421B CN 201910727857 A CN201910727857 A CN 201910727857A CN 110342421 B CN110342421 B CN 110342421B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/26—Adaptations or arrangements of pistons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
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- Mechanical Engineering (AREA)
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- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses an oil pump with a quick lifting function and a method thereof, wherein the oil pump comprises a pump body, a double-plunger mechanism and an oil circuit system; the inside of the pump body is hollow, and an upper cavity in the pump body is an oil storage tank; a piston rod is inserted into the pump body; the double plunger mechanism is arranged on the right side of the pump body, a handle base is arranged on the upper side of the double plunger mechanism, the top of the handle base is a handle connecting plate, and the oil pump is connected with an external handle through the handle connecting plate; the working method of the oil pump completes the work of the oil pump through a plurality of steps. The double-plunger oil pump has revolutionary progress in the whole storage industry, has ultrahigh bearing capacity, can be lifted quickly and stopped accurately, has higher working efficiency, reduces labor intensity, saves time and labor, ensures safer use process of the oil pump, can protect the oil pump by self, and protects the pump body from damage.
Description
Technical Field
The invention relates to a pump and a method, in particular to an oil pump with a quick lifting function and a method.
Background
At present, people can use a manual carrier, a lifting car and a lifting trolley to carry and turnover goods, the common carrier is lifted from the lowest height of 85mm to the highest height of 190mm, the pressure handle needs to act 13 times, the carrying speed is very slow and the efficiency is very low, and the electric carrier cannot enter a narrow space to carry under the influence of the volume of the electric carrier. For a common lifting vehicle, the pressing handle needs to act 98 times when lifting the heavy object from 85mm to 1500mm, the time required for carrying is longer, when the lifting and carrying of the heavy object are finished, the worker has a great need for full sweat, and the time and the labor are wasted, and the labor intensity of the worker is high but the carrying efficiency is low. Therefore, a hydraulic device which can realize quick lifting, has enough force in the lifting process and stable performance is needed to solve the problems of low speed, low efficiency, high labor intensity and the like of carrying goods in the practical application process of the conventional carrier, lifting trolley and lifting trolley.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides an oil pump with a rapid lifting function and a method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme: an oil pump with a rapid lifting function comprises a pump body, a double-plunger mechanism and an oil circuit system; the inside of the pump body is hollow, and an upper cavity in the pump body is an oil storage tank; a piston rod is inserted into the pump body;
The double plunger mechanism is arranged on the right side of the pump body, a handle base is arranged on the upper side of the double plunger mechanism, the top of the handle base is a handle connecting plate, and the oil pump is connected with an external handle through the handle connecting plate; the bottom of the handle base is provided with a handle rotating shaft, and the handle base is rotationally connected with the pump body through the handle rotating shaft;
the double-plunger mechanism comprises a plunger A and a plunger B, and the plunger B and the plunger A are arranged in parallel front and back; the upper parts of the plunger A and the plunger B are respectively provided with a handle roller, a handle roller shaft is inserted into the handle rollers, and the handle roller shafts are arranged on the handle base;
the oil circuit system comprises an oil inlet circuit, an oil outlet circuit, a pressure regulating oil circuit and a branch oil circuit; the oil inlet comprises an oil inlet A and an oil inlet B, one end of the oil inlet A is communicated with the plunger A, the other end of the oil inlet A is communicated with the oil storage tank, and the oil inlet A is provided with a one-way valve B; one end of the oil inlet path B is communicated with the plunger B, the other end of the oil inlet path B is communicated with the oil storage tank, and the oil inlet path B is provided with a one-way valve e;
The oil outlet comprises an oil outlet A and an oil outlet B, and the branch oil paths comprise a first branch oil path and a second branch oil path; one end of the oil outlet A is communicated with the plunger A, one end of the oil outlet B is communicated with the plunger B, and the other end of the oil outlet A is communicated with the rear part of the pressure release valve a through a branch oil way I after being converged with the other end of the oil outlet B;
The oil outlet line A is provided with a safety valve d, and the oil outlet line B is provided with a safety valve f; a pressure maintaining valve h is arranged at the rear of the pressure relief valve a, and the pressure maintaining valve h is communicated with the rear of the pressure relief valve a; a pressure relief valve rod is inserted in the pressure relief valve a, and an oil way steel ball is arranged behind the pressure relief valve rod; the front part of the pressure relief valve a is communicated with the oil inlet path A; the front end of the interior of the pressure maintaining valve h is provided with a valve rod, and the rear of the valve rod is provided with a spring; the pressure maintaining valve h is communicated with the lower cavity of the pump body through a second branch oil way;
The pressure regulating oil way comprises a pressure regulating oil way A and a pressure regulating oil way B, one end of the pressure regulating oil way A is communicated with the oil outlet way A, the other end of the pressure regulating oil way A is communicated with the oil inlet way B, and the pressure regulating oil way A is provided with a pressure regulating valve c; one end of the pressure regulating oil way B is communicated with the oil outlet way B, the other end of the pressure regulating oil way B is communicated with the oil inlet way A, and the pressure regulating valve g is arranged on the pressure regulating oil way B.
Further, plunger jackets are sleeved on the outer sides of the plunger A and the plunger B; plunger return springs are arranged on the plunger A and the plunger B, and are positioned in the plunger sheath.
Further, the oil storage tank and the pump body lower cavity are separated through a sealing gasket.
The working method of the oil pump with the rapid lifting function comprises the following steps:
Step a: the handle is rotated clockwise downwards, the handle rotates clockwise to drive the handle base to rotate clockwise around the handle rotating shaft, and the handle base drives the handle roller to press the plunger A and the plunger B downwards; the plunger A and the plunger B move downwards to pump oil outwards, the safety valves d and f on the oil outlet A and the oil outlet B are opened, the oil pumped by the plunger A and the plunger B respectively flows outwards through the oil outlet A and the oil outlet B, and the oil outwards flows into the rear part of the pressure release valve a through a branch oil way I after converging along the oil outlet A and the oil outlet B; after the oil enters the rear part of the pressure relief valve a, respectively pushing the oil way steel ball forward to close the pressure relief valve a and pushing the valve rod backward to open the pressure maintaining valve h, enabling the oil at the rear part of the pressure relief valve a to flow into the lower cavity of the pump body through the pressure maintaining valve h to act on the bottom of the piston rod, and pushing the piston rod to rise upwards;
Step b: the handle is rotated upwards anticlockwise, the handle base is driven to rotate anticlockwise around the handle rotating shaft, the handle base drives the handle roller to lift away from the plunger A and the plunger B, the plunger A and the plunger B move upwards under the return action of the plunger return spring and absorb oil to the inside of the plunger sheath, the one-way valves B and e on the oil inlet path A and the oil inlet path B are opened, and oil in the oil storage tank flows into the plunger sheaths sleeved on the outer sides of the plunger A and the plunger B through the oil inlet path A and the oil inlet path B respectively and fills the plunger sheath;
Meanwhile, the handle in the step a rotates clockwise to drive the piston rod to rise upwards so as to drive an external load to rise upwards, and the external load generates downward pressure on the piston rod; when the handle rotates anticlockwise and upwards, external load acts on the pressure on the piston rod and is transmitted to the valve rod in the pressure maintaining valve h, and the valve rod is pushed to move forwards to close the pressure maintaining valve h; the spring arranged in the pressure maintaining valve h plays an auxiliary pushing role on the forward movement of the valve rod, so that the piston rod can be always in a closed state when the handle rotates anticlockwise upwards no matter whether the piston rod is under the action of external load pressure, and the closing of the pressure maintaining valve h plays a first pressure maintaining buffering role to ensure that the piston rod is not decompressed and does not slide down; the arrangement of the safety valve d and the safety valve f enables the oil outlet passage A and the oil outlet passage B to be in a closed and non-through state when the handle rotates anticlockwise, and plays a role in second pressure maintaining buffer to ensure that the piston rod does not decompress and slide downwards;
Step c: c, continuously repeating clockwise and anticlockwise rotation of the handle in the step a and the step b, and lifting the piston rod to a set height under the continuous upward pushing action of oil liquid;
Step d: the pressure release valve rod is pushed backwards, the rear end of the pressure release valve rod pushes the oil way steel ball backwards, and the oil way steel ball is driven to move backwards to open the pressure release valve a; the pressure release valve rod is continuously pushed backwards, the oil way steel ball continuously moves backwards to be contacted with the front end of the valve rod and push the valve rod to move backwards, the pressure maintaining valve h is opened, at the moment, oil in the lower cavity of the pump body flows into the pressure maintaining valve h through the second branch oil way and then flows into the oil inlet path A through the pressure release valve a, finally, the oil returns to the oil storage tank, and the piston rod can completely descend.
Further, the piston rod is quickly lifted to the bottom of an external load by continuously and repeatedly rotating the handle clockwise and anticlockwise; the maximum bearing weight of the plunger B is greater than that of the plunger A; when the weight of the external load is greater than the maximum bearing weight of the plunger A, the plunger A stops working, and the oil pumped by the plunger A outwards flows into the pressure regulating oil way A to blow the pressure regulating valve C and then flows back into the oil storage tank along the oil inlet way B to finish pressure release; at this time, the plunger B continues to work to inject oil into the lower cavity of the pump body to push the piston rod to continuously ascend.
Further, the piston rod is quickly lifted to the bottom of the external load through continuous repeated clockwise and anticlockwise rotation of the handle, when the weight of the external load is greater than the maximum bearing weight of the plunger B, the plunger A and the plunger B stop working, and at the moment, the piston rod stops lifting and is kept in a static state; the oil pumped by the plunger B flows into the pressure regulating oil way B, and flows back into the oil storage tank along the oil inlet way A after the pressure regulating valve g is opened, so that pressure release is completed.
The double-plunger oil pump has revolutionary progress in the whole storage industry, has ultrahigh bearing capacity, can be lifted quickly and stopped accurately, has higher working efficiency, reduces labor intensity, saves time and labor, ensures safer use process of the oil pump, can protect the oil pump by self, and protects the pump body from damage.
Drawings
Fig. 1 is a schematic structural view of an oil pump.
Fig. 2 is a schematic diagram of the connection relationship of the oil passages of the oil pump.
Fig. 3 is an exploded view of fig. 1.
Fig. 4 is a schematic structural view of the relief valve a.
Fig. 5 is a schematic structural view of the pressure maintaining valve h.
Fig. 6 is a schematic structural view of the piston rod.
Fig. 7 is an enlarged view of a portion of the bottom of the piston rod of fig. 6.
In the figure: 1. a pump body; 2. a piston rod; 3. a handle base; 4. a handle rotation shaft; 5. a plunger A; 6. a plunger B; 7. a handle roller; 8. a handle roller shaft; 9. an oil inlet path A; 10. an oil inlet path B; 11. a one-way valve b; 12. an oil storage tank; 13. a one-way valve e; 14. an oil outlet line A; 15. an oil outlet line B; 16. a safety valve d; 17. a safety valve f; 18. a first branch oil path; 19. a second branch oil path; 20. a pressure relief valve a; 21. a pressure maintaining valve h; 22. a pressure relief valve stem; 23. steel balls in the oil way; 24. a valve stem; 25. a spring; 26. a pump body lower cavity; 27. a pressure regulating oil way A; 28. a pressure regulating oil circuit B; 29. a pressure regulating valve c; 30. a pressure regulating valve g; 31. a plunger return spring; 32. a plunger jacket; 33. plunger protecting cover; 34. a first communicating hole; 35. and a second communicating hole.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1 and 3, the oil pump of the invention is a special oil pump for a manual carrier, a lifting truck and a lifting trolley in the low-speed storage logistics industry. An oil pump with a rapid lifting function comprises a pump body 1, a double-plunger mechanism and an oil circuit system; the inside of the pump body 1 is hollow, an upper inner cavity of the pump body 1 is an oil storage tank 12, a lower inner cavity of the pump body 1 is a lower pump body cavity 26, and the oil storage tank 12 and the lower pump body cavity 26 are separated by a sealing gasket; a piston rod 2 is inserted into the pump body 1.
The pump body 1 is of a closed circulation design, namely, hydraulic oil is concentrated in the oil storage tank 12 in a non-working state of the oil pump, and the bottom of the piston rod 2 is synchronously and rapidly supplied with oil through double plungers of the double plunger mechanism during the working of the oil pump, so that the piston rod 2 is rapidly lifted.
The double plunger mechanism is arranged on the right side of the pump body 1, a handle base 3 is arranged on the upper side of the double plunger mechanism, a handle connecting plate is arranged at the top of the handle base 3, and the oil pump is connected with an external handle through the handle connecting plate; the bottom of the handle base 3 is provided with a handle rotation shaft 4, and the handle base 3 is rotationally connected with the pump body 1 through the handle rotation shaft 4.
The double-plunger mechanism comprises a plunger A5 and a plunger B6, and the plunger B6 and the plunger A5 are arranged in parallel front and back; plunger jackets 32 are sleeved on the outer sides of the plunger A5 and the plunger B6; plunger A5 and plunger B6 are provided with plunger return springs 31, and plunger return springs 31 are located inside plunger jacket 32.
The upper parts of the plunger A5 and the plunger B6 are respectively provided with a handle roller 7, a handle roller shaft 8 is inserted into the handle roller 7, and the handle roller shaft 8 is arranged on the handle base 3.
As shown in fig. 2, the oil path system comprises an oil inlet path, an oil outlet path, a pressure regulating oil path and a branch oil path; the oil inlet comprises an oil inlet A9 and an oil inlet B10, one end of the oil inlet A9 is communicated with the plunger A5, the other end of the oil inlet A9 is communicated with the oil storage tank 12, and the oil inlet A9 is provided with a one-way valve B11; one end of the oil inlet path B10 is communicated with the plunger B6, the other end of the oil inlet path B10 is communicated with the oil storage tank 12, and the oil inlet path B10 is provided with a one-way valve e13.
The oil outlet comprises an oil outlet A14 and an oil outlet B15, and the branch oil paths comprise a first branch oil path 18 and a second branch oil path 19; one end of the oil outlet passage A14 is communicated with the plunger A5, one end of the oil outlet passage B15 is communicated with the plunger B6, and the other end of the oil outlet passage A14 is communicated with the rear part of the pressure relief valve a20 through a branch oil passage 18 after converging with the other end of the oil outlet passage B15.
The oil outlet line A14 is provided with a safety valve d16, and the oil outlet line B15 is provided with a safety valve f17; a pressure maintaining valve h21 is arranged at the rear of the pressure relief valve a20, and the pressure maintaining valve h21 is communicated with the rear of the pressure relief valve a 20; as shown in fig. 4, a pressure release valve rod 22 is inserted in the pressure release valve a20, and an oil way steel ball 23 is arranged behind the pressure release valve rod 22; the front part of the pressure relief valve a20 is communicated with an oil inlet path A9; as shown in fig. 5, the front end of the inside of the pressure maintaining valve h21 is provided with a valve rod 24, and a spring 25 is provided behind the valve rod 24; the pressure maintaining valve h21 is communicated with the pump body lower cavity 26 through a second branch oil way 19.
The pressure regulating oil way comprises a pressure regulating oil way A27 and a pressure regulating oil way B28, one end of the pressure regulating oil way A27 is communicated with the oil outlet way A14, the other end of the pressure regulating oil way A27 is communicated with the oil inlet way B10, and the pressure regulating oil way A27 is provided with a pressure regulating valve c29; one end of the pressure regulating oil path B28 is communicated with the oil outlet path B15, the other end of the pressure regulating oil path B28 is communicated with the oil inlet path A9, and the pressure regulating valve g30 is arranged on the pressure regulating oil path B28.
The working method of the oil pump with the rapid lifting function comprises the following steps:
Step a: the handle is rotated downwards clockwise, the handle rotates clockwise to drive the handle base 3 to rotate clockwise around the handle rotating shaft 4, and the handle base 3 drives the handle roller 7 to press the plunger A5 and the plunger B6 downwards; the plunger A5 and the plunger B6 move downwards to pump oil outwards, the safety valve d16 and the safety valve f17 on the oil outlet passage A14 and the oil outlet passage B15 are opened, the oil pumped by the plunger A5 and the plunger B6 respectively flows outwards through the oil outlet passage A14 and the oil outlet passage B15, and the oil outwards flows into the rear part of the pressure relief valve a20 through the branch oil passage 18 after being converged along the oil outlet passage A14 and the oil outlet passage B15; after the oil enters the rear part of the pressure relief valve a20, respectively pushing the oil way steel ball 23 forwards to close the pressure relief valve a20 and pushing the valve rod 24 backwards to open the pressure maintaining valve h21, enabling the oil at the rear part of the pressure relief valve a20 to flow into the pump body lower cavity 26 through the pressure maintaining valve h21 to act on the bottom of the piston rod 2, and pushing the piston rod 2 to rise upwards;
Step b: the handle is rotated upwards anticlockwise, the handle base 3 is driven to rotate anticlockwise around the handle rotating shaft 4 by rotating anticlockwise, the handle base 3 drives the handle roller 7 to lift away from the plunger A5 and the plunger B6, the plunger A5 and the plunger B6 move upwards under the return action of the plunger return spring 31 and absorb oil to the inside of the plunger sheath 32, the check valves B11 and e13 on the oil inlet path A9 and the oil inlet path B10 are opened, and oil in the oil storage tank 12 flows into the plunger sheath 32 sleeved outside the plunger A5 and the plunger B6 through the oil inlet path A9 and the oil inlet path B10 respectively and fills the plunger sheath 32;
Meanwhile, the handle in the step a rotates clockwise to drive the piston rod 2 to rise upwards so as to drive an external load to rise upwards, and the external load generates downward pressure on the piston rod 2; when the handle rotates counterclockwise and upward, the external load acts on the pressure on the piston rod 2 to be transmitted to the valve rod 24 in the pressure maintaining valve h21, and the valve rod 24 is pushed to move forward to close the pressure maintaining valve h21; the spring 25 arranged in the pressure maintaining valve h21 plays an auxiliary pushing role on the forward movement of the valve rod 24, so that the piston rod 2 can be ensured to be always in a closed state when the pressure maintaining valve h21 rotates anticlockwise upwards no matter whether the piston rod 2 is under the action of external load pressure, and the closing of the pressure maintaining valve h21 plays a first pressure maintaining buffering role to ensure that the piston rod 2 does not decompress and slide downwards; the arrangement of the safety valve d16 and the safety valve f17 enables the oil outlet passage A14 and the oil outlet passage B15 to be in a closed and non-open state when the handle rotates anticlockwise, and plays a role in second pressure maintaining buffer to ensure that the piston rod 2 does not decompress and slide down;
The dual pressure maintaining buffering function is matched to ensure that the piston rod 2 does not decompress or slide down, and the stopping is accurate.
Step c: c, continuously repeating clockwise and anticlockwise rotation of the handle in the step a and the step b, and lifting the piston rod 2 to a set height under the continuous upward pushing action of oil liquid;
step d: the pressure release valve rod 22 is pushed backwards, and the rear end of the pressure release valve rod 22 pushes the oil way steel ball 23 backwards to drive the oil way steel ball 23 to move backwards to open the pressure release valve a20; the pressure relief valve rod 22 is continuously pushed backwards, the oil way steel ball 23 continuously moves backwards to be contacted with the front end of the valve rod 24 and push the valve rod 24 to move backwards, the pressure maintaining valve h21 is opened, at the moment, oil in the pump body lower cavity 26 flows into the pressure maintaining valve h21 through the second branch oil way 19 and then flows into the oil inlet way A9 through the pressure relief valve a20, finally returns into the oil storage tank 12, the piston rod 2 can completely descend, and the whole working cycle of the oil pump is completed.
The oil pump synchronously and rapidly supplies oil to the bottom of the piston rod 2 through the plunger A5 and the plunger B6 during operation, and can realize rapid lifting of the piston rod 2 compared with the single plunger oil supply in the prior art; the upper end of a piston rod of the oil pump is connected with a lifting platform of a manual carrier, a lifting trolley and a lifting trolley, and goods can be carried by lifting the piston rod 2 through the oil pump when the goods are placed on the lifting platform.
The oil pump is further provided with triple protection, so that the oil pump is safer in the use process, the first heavy protection is that the piston rod 2 is provided with high protection, namely, the piston rod 2 can not continuously ascend no matter how the handle works after the piston rod is lifted to the set height. As shown in fig. 6 and 7, a first communication hole 34 is formed in the bottom surface of the piston rod 2, a second communication hole 35 is formed in the bottom side surface of the piston rod 2, and the first communication hole 34 is communicated with the second communication hole 35. Because the piston rod 2 is inserted into the pump body 1, the upper cavity in the pump body 1 is the oil storage tank 12, the lower cavity in the pump body 1 is the lower cavity 26 of the pump body, the oil storage tank 12 and the lower cavity 26 of the pump body are separated by a sealing gasket, the lower cavity 26 of the pump body is communicated with the first communication hole 34, the first communication hole 34 is communicated with the second communication hole 35, but before the piston rod 2 does not reach the set highest height, the outer side of the second communication hole 35 corresponds to the position in the lower cavity 26 of the pump body, so the oil storage tank 12 and the lower cavity 26 of the pump body are separated;
When the piston rod 2 is lifted to the set highest height, the bottom of the oil storage tank 12 corresponds to the outer side of the second communication hole 35, the oil storage tank 12 is communicated with the second communication hole 35 and then is communicated with the pump body lower cavity 26 through the first communication hole 34, so that the oil storage tank 12 is communicated with the pump body lower cavity 26, the oil pressure in the two is equal, the oil in the pump body lower cavity 26 cannot push the piston rod 2 to continuously lift upwards, and the piston rod 2 can keep static at the highest height position and does not lift.
The second protection of the oil pump is that the piston rod 2 is quickly lifted to the bottom of an external load by continuously and repeatedly rotating the handle clockwise and anticlockwise; the maximum bearing weight of the plunger B6 is larger than that of the plunger A5, and the oil pump has larger bearing weight due to the arrangement of the double plungers of the oil pump, and has ultrahigh bearing capacity compared with the single plunger oil pump in the prior art. When the weight of the external load is greater than the maximum bearing weight of the plunger A5, the plunger A5 stops working, and the oil pumped by the plunger A5 outwards flows into the pressure regulating oil way A27 to flush the pressure regulating valve C29 and then flows back into the oil storage tank 12 along the oil inlet way B10 to finish pressure release, so that the pump body is protected from damage; at this time, the plunger B6 continues to work to inject oil into the pump body lower cavity 26 to push the piston rod 2 to continuously ascend, so as to drive the large-tonnage cargo on the lifting platform to continuously lift.
The third protection of the oil pump is that the piston rod 2 is quickly lifted to the bottom of an external load by continuously and repeatedly rotating the handle clockwise and anticlockwise, when the weight of the external load is greater than the maximum bearing weight of the plunger B6, the plunger A5 and the plunger B6 stop working, and at the moment, the piston rod 2 stops lifting and is kept in a static state; the oil pumped by the plunger B6 flows into the pressure regulating oil way B28 to flush the pressure regulating valve g30 and then flows back into the oil storage tank 12 along the oil inlet way A9 to complete pressure release, which is self-protection of the oil pump and prevents the pump body from damage caused by overload.
The manual carrier using the oil pump can reach the highest height of 190mm after the handle is operated for 5 times, and the working efficiency of the oil pump is improved by 230% compared with that of the traditional single-plunger oil pump; the lifting vehicle using the oil pump can reach the highest height of 1500mm after the handle is actuated 40 times, and the working efficiency of the oil pump is improved by 245% compared with that of the traditional single-plunger oil pump. The oil pump greatly saves working time and reduces labor intensity, and because the pressure maintaining valve h21, the safety valve d16 and the safety valve f17 play a role in dual pressure maintaining and buffering, the oil pump is safer in use, can not be decompressed and can not fall down due to the cooperation with the triple protection of the oil pump, the oil pump can perform self protection when being overweight in load, and the pump body is protected from damage.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be limited to the following claims.
Claims (4)
1. An oil pump with quick lifting function, which is characterized in that: comprises a pump body (1), a double-plunger mechanism and an oil circuit system; the inside of the pump body (1) is hollow, and an upper cavity in the pump body (1) is an oil storage tank (12); a piston rod (2) is inserted into the pump body (1);
The double-plunger mechanism is arranged on the right side of the pump body (1), a handle base (3) is arranged on the upper side of the double-plunger mechanism, the top of the handle base (3) is a handle connecting plate, and the oil pump is connected with an external handle through the handle connecting plate; the bottom of the handle base (3) is provided with a handle rotating shaft (4), and the handle base (3) is rotationally connected with the pump body (1) through the handle rotating shaft (4);
the double-plunger mechanism comprises a plunger A (5) and a plunger B (6), wherein the plunger B (6) and the plunger A (5) are arranged in parallel front and back; the upper parts of the plunger A (5) and the plunger B (6) are respectively provided with a handle roller (7), a handle roller shaft (8) is inserted into the handle rollers (7), and the handle roller shafts (8) are arranged on the handle base (3); plunger jackets (32) are sleeved on the outer sides of the plunger A (5) and the plunger B (6); plunger return springs (31) are arranged on the plunger A (5) and the plunger B (6), and the plunger return springs (31) are positioned in a plunger jacket (32);
The oil way system comprises an oil inlet way, an oil outlet way, a pressure regulating oil way and a branch oil way; the oil inlet comprises an oil inlet A (9) and an oil inlet B (10), one end of the oil inlet A (9) is communicated with the plunger A (5), the other end of the oil inlet A is communicated with the oil storage tank (12), and the oil inlet A (9) is provided with a one-way valve B (11); one end of the oil inlet path B (10) is communicated with the plunger B (6), the other end of the oil inlet path B is communicated with the oil storage tank (12), and the oil inlet path B (10) is provided with a one-way valve e (13);
The oil outlet comprises an oil outlet A (14) and an oil outlet B (15), and the branch oil paths comprise a first branch oil path (18) and a second branch oil path (19); one end of the oil outlet passage A (14) is communicated with the plunger A (5), one end of the oil outlet passage B (15) is communicated with the plunger B (6), and the other end of the oil outlet passage A (14) is communicated with the rear part of the pressure relief valve a (20) through a first branch oil passage (18) after being converged with the other end of the oil outlet passage B (15);
The oil outlet pipeline A (14) is provided with a safety valve d (16), and the oil outlet pipeline B (15) is provided with a safety valve f (17); a pressure maintaining valve h (21) is arranged at the rear part of the pressure relief valve a (20), and the pressure maintaining valve h (21) is communicated with the rear part of the pressure relief valve a (20); a pressure relief valve rod (22) is inserted into the pressure relief valve a (20), and an oil way steel ball (23) is arranged behind the pressure relief valve rod (22); the front part of the pressure relief valve a (20) is communicated with the oil inlet path A (9); a valve rod (24) is arranged at the front end of the interior of the pressure maintaining valve h (21), and a spring (25) is arranged behind the valve rod (24); the pressure maintaining valve h (21) is communicated with the pump body lower cavity (26) through a second branch oil way (19);
The pressure regulating oil way comprises a pressure regulating oil way A (27) and a pressure regulating oil way B (28), one end of the pressure regulating oil way A (27) is communicated with the oil outlet way A (14), the other end of the pressure regulating oil way A is communicated with the oil inlet way B (10), and the pressure regulating valve c (29) is arranged on the pressure regulating oil way A (27); one end of the pressure regulating oil way B (28) is communicated with the oil outlet way B (15), the other end of the pressure regulating oil way B is communicated with the oil inlet way A (9), and the pressure regulating valve g (30) is arranged on the pressure regulating oil way B (28).
The oil storage tank (12) is separated from the pump body lower cavity (26) through a sealing gasket.
2. A method of operating an oil pump with a quick lifting function as claimed in claim 1, characterized in that: the working method comprises the following steps:
Step a: the handle is rotated downwards clockwise, the handle is rotated clockwise to drive the handle base (3) to rotate clockwise around the handle rotating shaft (4), and the handle base (3) drives the handle roller (7) to press the plunger A (5) and the plunger B (6); the plunger A (5) and the plunger B (6) move downwards to pump oil outwards, the safety valve d (16) and the safety valve f (17) on the oil outlet passage A (14) and the oil outlet passage B (15) are opened, oil pumped by the plunger A (5) and the plunger B (6) respectively flows outwards through the oil outlet passage A (14) and the oil outlet passage B (15), and the oil outwards flows into the rear part of the pressure relief valve a (20) through a first branch oil passage (18) after being converged along the oil outlet passage A (14) and the oil outlet passage B (15); after oil enters the rear part of the pressure relief valve a (20), the oil way steel ball (23) is pushed forward to close the pressure relief valve a (20) and the valve rod (24) is pushed backward to open the pressure maintaining valve h (21), oil at the rear part of the pressure relief valve a (20) flows into the pump body lower cavity (26) through the pressure maintaining valve h (21) to act on the bottom of the piston rod (2), and the piston rod (2) is pushed to rise upwards;
Step b: the handle is rotated upwards anticlockwise, the handle base (3) is driven to rotate anticlockwise around the handle rotating shaft (4), the handle base (3) drives the handle roller (7) to lift away from the plunger A (5) and the plunger B (6), the plunger A (5) and the plunger B (6) move upwards under the return action of the plunger return spring (31) and absorb oil to the inside of the plunger sheath (32), the one-way valve B (11) and the one-way valve e (13) on the oil inlet path A (9) and the oil inlet path B (10) are opened, and oil in the oil storage tank (12) flows into the plunger sheath (32) sleeved outside the plunger A (5) and the plunger B (6) through the oil inlet path A (9) and the oil inlet path B (10) respectively and fills the plunger sheath (32);
Simultaneously, the handle in the step a rotates clockwise to drive the piston rod (2) to rise upwards so as to drive an external load to rise upwards, and the external load generates downward pressure on the piston rod (2); when the handle rotates anticlockwise and upwards, the external load acts on the pressure on the piston rod (2) to be transmitted to the valve rod (24) in the pressure maintaining valve h (21), and the valve rod (24) is pushed to move forwards to close the pressure maintaining valve h (21); the spring (25) arranged in the pressure maintaining valve h (21) plays an auxiliary pushing role on the forward movement of the valve rod (24), so that the piston rod (2) can be always in a closed state when the pressure maintaining valve h (21) rotates anticlockwise upwards no matter whether the piston rod is under the action of external load pressure, and the closing of the pressure maintaining valve h (21) plays a first pressure maintaining buffering role to ensure that the piston rod (2) is not decompressed and does not slide down; the arrangement of the safety valve d (16) and the safety valve f (17) enables the oil outlet passage A (14) and the oil outlet passage B (15) to be in a closed and non-through state when the handle rotates anticlockwise, and plays a second pressure-maintaining buffering role to ensure that the piston rod (2) does not decompress and slide down;
Step c: c, continuously repeating clockwise and anticlockwise rotation of the handle in the step a and the step b, and lifting the piston rod (2) to a set height under the continuous upward pushing action of oil liquid;
step d: the pressure release valve rod (22) is pushed backwards, and the rear end of the pressure release valve rod (22) pushes the oil way steel ball (23) backwards to drive the oil way steel ball (23) to move backwards to open the pressure release valve a (20); the pressure release valve rod (22) is continuously pushed backwards, the oil way steel ball (23) continuously moves backwards to be contacted with the front end of the valve rod (24) and push the valve rod (24) to move backwards, the pressure maintaining valve h (21) is opened, at the moment, oil in the pump body lower cavity (26) flows into the pressure maintaining valve h (21) through the second branch oil way (19) and then flows into the oil inlet way A (9) through the pressure release valve a (20), finally returns into the oil storage tank (12), and the piston rod (2) can be completely lowered.
3. The working method of the oil pump with the quick lifting function according to claim 2, wherein the working method comprises the following steps of: the piston rod (2) is rapidly lifted to the bottom of an external load by continuously and repeatedly rotating the handle clockwise and anticlockwise; the maximum bearing weight of the plunger B (6) is greater than that of the plunger A (5); when the weight of the external load is greater than the maximum bearing weight of the plunger A (5), the plunger A (5) stops working, and the oil pumped out by the plunger A (5) flows into a pressure regulating oil way A (27) to flush a pressure regulating valve C (29) and then flows back into an oil storage tank (12) along an oil inlet way B (10) to finish pressure release; at the moment, the plunger B (6) continues to work, oil is injected into the pump body lower cavity (26) to push the piston rod (2) to continuously ascend.
4. A method of operating an oil pump with a quick lifting function according to claim 3, characterized in that: the piston rod (2) is rapidly lifted to the bottom of an external load through continuous repeated clockwise and anticlockwise rotation of the handle, when the weight of the external load is larger than the maximum bearing weight of the plunger B (6), the plunger A (5) and the plunger B (6) stop working, and at the moment, the piston rod (2) stops lifting and is kept in a static state; the oil pumped out by the plunger B (6) flows into the pressure regulating oil way B (28) to flush the pressure regulating valve g (30) and then flows back into the oil storage tank (12) along the oil inlet way A (9) to finish pressure release.
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| CN201910727857.6A CN110342421B (en) | 2019-08-08 | 2019-08-08 | Oil pump with rapid lifting function and method |
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| CN201910727857.6A CN110342421B (en) | 2019-08-08 | 2019-08-08 | Oil pump with rapid lifting function and method |
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| CN110342421B true CN110342421B (en) | 2024-05-28 |
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| CN110342421A (en) | 2019-10-18 |
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Effective date of registration: 20240428 Address after: 075000 Yanjiatun Village, Shenjiatun Town, Zhangjiakou High tech Zone, Zhangjiakou City, Hebei Province Applicant after: Zhangjiakou Jialong Technology Co.,Ltd. Country or region after: China Address before: 318000, Zhejiang, Taizhou province Jiaojiang District Hong family Street Village Applicant before: Taizhou Donghong Environmental Protection Technology Co.,Ltd. Country or region before: China |
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