CN107387353B - Ultrahigh pressure water pump - Google Patents
Ultrahigh pressure water pump Download PDFInfo
- Publication number
- CN107387353B CN107387353B CN201710765790.6A CN201710765790A CN107387353B CN 107387353 B CN107387353 B CN 107387353B CN 201710765790 A CN201710765790 A CN 201710765790A CN 107387353 B CN107387353 B CN 107387353B
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- cavity
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- communicated
- sealing
- rear end
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 239000007788 liquid Substances 0.000 claims abstract description 87
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 113
- 239000012530 fluid Substances 0.000 claims description 31
- 210000004907 gland Anatomy 0.000 claims description 16
- 230000033001 locomotion Effects 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 6
- 238000005192 partition Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/28—Control of machines or pumps with stationary cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/002—Hydraulic systems to change the pump delivery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
- F04B9/105—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor
- F04B9/1056—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor with fluid-actuated inlet or outlet valve
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses an ultrahigh pressure water pump, and relates to the technical field of water pumps. It comprises the following steps: the inner cavity of the hydraulic cylinder comprises a power section and a liquid return section; the piston comprises a separation part, a main body part and a power part which are sequentially connected, the cross section area of the power part is larger than that of the separation part, the separation part is matched with the liquid return section, the power part is matched with the power section, the separation part and the power part divide the inner cavity of the hydraulic cylinder into a liquid return cavity, a back cavity and a forward cavity, the power liquid inlet is communicated with the back cavity, the power liquid outlet is communicated with the forward cavity, and the piston is provided with an inertia valve for communicating the forward cavity with the liquid return cavity or the back cavity; and a plunger pump unit driven by the piston, the plunger pump unit including a pump body and a plunger rod; the sectional area of the power section minus the sectional area of the liquid return section is larger than the sectional area of the inner cavity of the pump body.
Description
Technical Field
The invention relates to the technical field of water pumps, in particular to an ultrahigh pressure water pump.
Background
The traditional high-pressure pump adopts an internal combustion engine to drive a pump body to operate, and the transmission mode adopts gear crankshaft transmission. The high-pressure pump of the internal combustion engine is usually adopted with more than 200-300 parts, and the transmission parts are more, so that the internal combustion engine has huge volume, complex structure and high failure rate. And the traditional gear crankshaft connecting rod transmission has the effective power of 80% at most and low effective power.
Disclosure of Invention
The invention aims to provide an ultrahigh pressure water pump so as to solve the technical problems of huge volume, complex structure, high failure rate and low effective power caused by more transmission parts of the traditional high pressure pump in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an ultra-high pressure water pump, comprising:
the hydraulic cylinder is provided with a power fluid inlet and a power fluid outlet, the inner cavity of the hydraulic cylinder comprises a power section and a liquid return section which are communicated with each other and are parallel to each other in axis, and the sectional area of the power section is larger than that of the liquid return section;
the piston is arranged in the inner cavity of the hydraulic cylinder and comprises a separation part, a main body part and a power part which are sequentially connected from front to back, the sectional area of the power part is larger than that of the separation part, the separation part is in sliding sealing fit with the liquid return section, the power part is in sliding sealing fit with the power section, the separation part and the power part sequentially divide the inner cavity of the hydraulic cylinder into a liquid return cavity, a back cavity and a forward cavity from front to back, the power liquid inlet is communicated with the back cavity, the power liquid outlet is communicated with the forward cavity, and an inertia valve used for enabling the forward cavity to be communicated with the liquid return cavity or enabling the forward cavity to be communicated with the back cavity is arranged on the piston; and
the plunger pump unit is connected to the rear end part of the hydraulic cylinder and driven by the piston, and comprises a pump body and a plunger rod arranged in an inner cavity of the pump body;
the difference between the sectional area of the power section and the sectional area of the liquid return section is larger than the sectional area of the inner cavity of the pump body.
Further, the inertia valve comprises a valve cavity, an inertia valve core which is positioned in the valve cavity and reciprocates in the piston movement direction, and a guide mechanism for guiding the inertia valve core in the piston movement direction;
the front end of the valve cavity is provided with a liquid return pipe communicated with the liquid return cavity, and the rear end of the valve cavity is respectively provided with a forward pipe communicated with the forward cavity and a backward pipe communicated with the backward cavity;
the inertia valve core comprises a front end sealing part for controlling whether the liquid return pipe is communicated with the valve cavity, a rear end sealing part for controlling whether the liquid return pipe is communicated with the valve cavity, and a connecting part connected between the front end sealing part and the rear end sealing part.
Further, the valve cavity comprises a front end conduction ring groove, a front end step cylindrical section, a cylindrical communication section, a rear end step cylindrical section and a rear end conduction ring groove which are coaxially arranged and are sequentially communicated from front to back; the diameter of the front end step cylindrical section communicated with the opening inside the front end conduction ring groove is larger than that of the communicating section; the rear end of the rear end step cylindrical section is communicated with the opening at the inner side of the rear end conduction ring groove, and the diameter of the rear end step cylindrical section is smaller than the outer diameter of the rear end conduction ring groove; the liquid return pipe is communicated with the front end conduction ring groove, the back pipe is communicated with the back end conduction ring groove, and the forward pipe is communicated with the communication section;
the front end seal portion includes: the outer side surface is used for sealing a circular pipe-shaped front end sealing section of the inner side opening of the front end conduction ring groove and a front end sealing section used for sealing and matching with the front end step cylindrical section;
the rear end seal portion includes: the side surface is used for sealing a cylindrical rear end sealing section of the inner side opening of the rear end conduction ring groove and a rear end sealing section used for sealing and matching with the rear end step cylindrical section;
the front end plugging section, the front end sealing section, the connecting part, the rear end sealing section and the rear end plugging section are sequentially connected from front to back;
and a conduction gap is formed between the communication section and the connecting part, and the length of the communication section is smaller than that of the connecting part.
Further, the guide mechanism includes: the annular front end guide cavity is positioned at the front end of the valve cavity and is in sliding fit with the front end plugging section, and the cylindrical rear end guide cavity is positioned at the rear end of the valve cavity and is in sliding fit with the rear end plugging section.
Further, a balance pipe which is communicated with the liquid return cavity and the advancing cavity is arranged on the piston, a liquid return annular groove is formed in the front end face of the separation part, and the liquid return pipe is communicated with the liquid return annular groove; the rear end face of the power part is provided with an advancing annular groove, and the advancing pipe is communicated with the advancing annular groove; one end of the balance pipe is communicated with the liquid return annular groove, and the other end of the balance pipe is communicated with the advancing pipe.
Further, the pump body compression starting end is connected with the hydraulic cylinder, and the pump body compression tail end is provided with a water inlet and a water outlet; the axis of the plunger rod is collinear with the axis of the piston; the plunger rod drive end is connected to the piston.
Further, the plunger pump unit is provided with two plunger pump units and is respectively connected with the front end and the rear end of the hydraulic cylinder.
Further, the pump body comprises a connecting sleeve with a hollow cavity in the inner part and openings at the starting end and the tail end, a sealing body for sealing the opening at the tail end of the connecting sleeve, and a gland connected to the tail end of the pump body and used for compressing the sealing body at the opening at the tail end of the connecting sleeve; the starting end of the pump body is connected with the hydraulic cylinder; the gland is provided with a through hole; the sealing body cover end seals the opening at the tail end of the connecting sleeve and is provided with a water outlet pipe and a water inlet one-way valve which are communicated with the inner cavity of the connecting sleeve, and the sealing body connecting end penetrates through the through hole and is provided with a water outlet one-way valve which is communicated with the water outlet pipe; the sealing body connecting end is in sealing connection with the through hole, and the gland is provided with a water inlet pipe communicated with the water inlet one-way valve.
Further, the water outlet one-way valve is detachably connected with the sealing body, and a connector for connecting water equipment is arranged at the water outlet end of the water outlet one-way valve.
Further, the hydraulic cylinder comprises a tubular cylinder body with two open ends, a tubular cylinder sleeve arranged in the inner cavity of the cylinder body and a sealing cover part sealed at the two ends of the cylinder body; the middle shaft of the cylinder sleeve and the middle shaft of the inner cavity of the cylinder body are coaxially arranged; the power fluid inlet and the power fluid outlet are arranged on the side wall of the cylinder body, and the cylinder sleeve is positioned between the power fluid inlet and the power fluid outlet; and the cover sealing part is provided with a through hole with a sealing structure.
The invention has the beneficial effects that: compared with the prior art, the ultrahigh pressure water pump has no rotating part, the piston which moves linearly drives the plunger pump unit, the loss of power transmission is reduced, and the effective power is high; the transformation ratio of the output water pressure and the flow is realized through the transformation ratio of the input hydraulic pressure bearing surface and the output plunger bearing surface, and stepless speed regulation of the flow and the pressure of the water pump can be achieved through adjusting the pressure and the flow of the hydraulic power source. The hydraulic cylinder is provided with a fixed power fluid inlet and a fixed power fluid outlet, when the piston moves, the switching of the power fluid flow is realized through an inertia valve in the plunger, and the reciprocating motion of the piston is realized. The sectional area of the power section minus the sectional area of the liquid return section is larger than the sectional area of the inner cavity of the pump body, so that the pressure of the inner cavity of the pump body is larger than the pressure of the inner cavity of the hydraulic cylinder, and the pressure of the water outlet of the ultrahigh-pressure water pump is further improved.
Drawings
FIG. 1 is a cross-sectional view of an ultra-high pressure water pump of the present invention;
fig. 2 is an enlarged view at a in fig. 1;
FIG. 3 is an enlarged view at B in FIG. 1;
fig. 4 is an enlarged view at C in fig. 1.
In the figure: 11-power fluid inlet, 12-power fluid outlet, 13-power section, 14-back fluid section, 15-cylinder, 16-cylinder sleeve, 17-cover part, 21-partition part, 22-main body part, 23-power part, 31-back fluid cavity, 32-back cavity, 33-forward cavity, 4-inertia valve, 41-front end step cylinder section, 42-communication section, 43-back end step cylinder section, 44-front end conducting ring groove, 45-back end conducting ring groove, 46-connection part, 47-front end sealing section, 48-back end sealing section, 51-connecting sleeve, 52-sealing body, 53-gland, 54-water inlet check valve, 55-water outlet check valve, 56-water inlet pipe, 57-water outlet pipe, 58-connecting head, 6-plunger rod, 71-back fluid pipe, 72-forward pipe, 73-back pipe, 81-front end sealing section, 82-back end sealing section, 83-front end guiding cavity, 84-back end guiding cavity and 9-balance pipe.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The ultra-high pressure water pump provided by the invention will now be described.
As shown in fig. 1 to 3, an ultra-high pressure water pump, comprising:
the hydraulic cylinder is provided with a power fluid inlet 11 and a power fluid outlet 12, the inner cavity of the hydraulic cylinder comprises a power section 13 and a liquid return section 14 which are communicated with each other and are parallel to each other in axis, and the sectional area of the power section 13 is larger than the sectional area of the liquid return section 14;
the piston is arranged in the inner cavity of the hydraulic cylinder, the piston comprises a separation part 21, a main body part 22 and a power part 23 which are sequentially connected from front to back, the sectional area of the power part 23 is larger than that of the separation part 21, the separation part 21 is in sliding sealing fit with the liquid return section 14, the power part 23 is in sliding sealing fit with the power section 13, the separation part 21 and the power part 23 sequentially divide the inner cavity of the hydraulic cylinder into a liquid return cavity 31, a back cavity 32 and a forward cavity 33 from front to back, the power liquid inlet 11 is communicated with the back cavity 32, the power liquid outlet 12 is communicated with the forward cavity 33, and an inertia valve 4 used for enabling the forward cavity 33 to be communicated with the liquid return cavity 31 or enabling the forward cavity 33 to be communicated with the back cavity 32 is arranged on the piston; and
the plunger pump unit is connected to the rear end part of the hydraulic cylinder and driven by the piston, and comprises a pump body and a plunger rod 6 arranged in an inner cavity of the pump body;
the difference between the sectional area of the power section 13 and the sectional area of the liquid return section 14 is larger than the sectional area of the inner cavity of the pump body.
Compared with the prior art, the ultrahigh pressure water pump provided by the invention has no rotating part, and the piston which moves linearly drives the plunger pump unit, so that the loss of power transmission is reduced, and the effective power is high; the transformation ratio of the output water pressure and the flow is realized through the transformation ratio of the input hydraulic pressure bearing surface and the output plunger bearing surface, and stepless speed regulation of the flow and the pressure of the water pump can be achieved through adjusting the pressure and the flow of the hydraulic power source. The hydraulic cylinder is provided with a fixed power fluid inlet 11 and a power fluid outlet 12, and when the piston moves, the power fluid flow is switched through the inertia valve 4 in the plunger, so that the reciprocating motion of the piston is realized. The sectional area of the power section 13 minus the sectional area of the liquid return section 14 is larger than the sectional area of the inner cavity of the pump body, so that the pressure of the inner cavity of the pump body is larger than the pressure of the inner cavity of the hydraulic cylinder, and the pressure of the water outlet of the ultrahigh-pressure water pump is further improved.
Specifically, the hydraulic cylinder is formed by casting processing, and the inner cavity of the hydraulic cylinder is provided with a power section 13 and a liquid return section 14 which are cylindrical and coaxially arranged. The diameter of the power section 13 is larger than that of the liquid return section 14, the diameter difference between the power section 13 and the liquid return section 14 can be directly processed in a hydraulic cylinder, or a cylindrical hole can be processed in the hydraulic cylinder, and then a cylinder sleeve 16 is arranged in the processed hole, so that the diameter difference between the power section 13 and the liquid return section 14 is realized. The piston reciprocates in the inner cavity of the hydraulic cylinder, the piston comprises three sections of separating parts 21, a main body part 22 and a power part 23 which are cylindrical and coaxially arranged, the diameter of the power part 23 is larger than that of the separating parts 21, and the diameter of the separating parts 21 is larger than that of the main body part 22. An inertia valve 4 is provided on the piston, and the inertia valve 4 is used to communicate the advance chamber 33 with the return chamber 31 or the retreat chamber 32. When the piston moves forward, the inertia valve 4 communicates the forward cavity 33 with the backward cavity 32, simultaneously cuts off the forward cavity 33 from the liquid return cavity 31, hydraulic oil enters the backward cavity 32 from the power liquid inlet 11 and then enters the forward cavity 33, high pressure is formed in the backward cavity 32 and the forward cavity 33, and the hydraulic oil in the forward cavity 33 pushes the power part 23 to enable the piston to move forward in the inner cavity of the hydraulic cylinder due to the fact that the diameter of the separation part 21 is smaller than the diameter of the power part 23, and the hydraulic oil in the liquid return cavity 31 is discharged from the power liquid outlet 12. After the piston moves forward to the front end of the inner cavity of the hydraulic cylinder, the inertia valve 4 is switched due to self inertia, and the piston starts to move backwards. After the inertia valve 4 is switched, the inertia valve 4 blocks the forward cavity 33 from the backward cavity 32, simultaneously communicates the forward cavity 33 with the backward cavity 31, hydraulic oil enters the backward cavity 32 from the power fluid inlet 11, high pressure is formed in the backward cavity 32, so that the hydraulic oil pushes the piston to move backwards, the hydraulic oil in the forward cavity 33 flows into the backward cavity 31, and then is discharged from the power fluid outlet 12. The sectional area of the power section 13 minus the sectional area of the liquid return section 14 is larger than the sectional area of the inner cavity of the pump body, so that the pressure of the inner cavity of the pump body is larger than the pressure of the inner cavity of the hydraulic cylinder, and the pressure of the water outlet of the ultrahigh-pressure water pump is further improved.
Further, as shown in fig. 1 to 3, as a specific embodiment of the ultra-high pressure water pump provided by the present invention, the inertia valve 4 includes a valve chamber, an inertia valve core that is located in the valve chamber and reciprocates in the piston movement direction, and a guide mechanism that guides the inertia valve core in the piston movement direction;
the front end of the valve cavity is provided with a liquid return pipe 71 communicated with the liquid return cavity 31, and the rear end of the valve cavity is respectively provided with a forward pipe 72 communicated with the forward cavity 33 and a backward pipe 73 communicated with the backward cavity 32;
the inertia valve spool includes a front end seal portion for controlling whether the return pipe 71 communicates with the valve chamber, a rear end seal portion for controlling whether the return pipe 73 communicates with the valve chamber, and a connection portion 46 connected between the front end seal portion and the rear end seal portion.
Specifically, the valve cavity is a cylindrical cavity, is arranged in the main body part 22 of the piston, and is coaxially arranged with the main body part 22. The inertia valve core is positioned in the valve cavity, is coaxially arranged with the valve cavity and reciprocates along the front-back direction of the valve cavity under the guiding action of the guiding mechanism; the front end of the inertia valve core is a front end sealing part, the middle is a connecting part 46, and the rear end is a front end sealing part. The liquid return pipe 71 is provided in the partition 21 and communicates the front end of the valve chamber with the liquid return chamber 31. The retreat pipe 73 is provided in the main body 22 and communicates the rear end of the valve chamber with the retreat chamber 32. The advance pipe 72 is provided on the power portion 23 and communicates the rear end of the valve chamber with the advance chamber 33. The inertia valve 4 is in the initial position, the front end sealing part cuts off the liquid return pipe 71 and the valve cavity, the rear end sealing part simultaneously communicates the retreating pipe 73 with the valve cavity, so that the retreating cavity 32 is communicated with the advancing cavity 33 through the valve cavity and the advancing pipe 72, the advancing cavity 33 is cut off from the liquid return cavity 31, and the piston moves forward. After the inertia valve 4 is switched, the front end sealing part communicates the liquid return pipe 71 with the valve cavity, the rear end sealing part simultaneously cuts off the retreating pipe 73 from the valve cavity, so that the retreating cavity 32 is cut off from the advancing cavity 33, and simultaneously the advancing cavity 33 is communicated with the liquid return cavity 31 through the advancing pipe 72, the valve cavity and the liquid return pipe 71, and the piston starts retreating. More specifically, the front end sealing part may be tapered, and the valve cavity is provided with a tapered surface matched with the front end sealing part to isolate the valve cavity from the liquid return pipe 71; the rear end seal may be tapered, and the valve chamber is provided with a tapered surface that mates with the rear end seal to isolate the valve chamber from the return tube 73.
Further, as shown in fig. 1 to 3, as a specific embodiment of the ultra-high pressure water pump provided by the present invention, the valve cavity includes a front end conducting ring groove 44, a front end step cylindrical section 41, a cylindrical communicating section 42, a rear end step cylindrical section 43 and a rear end conducting ring groove 45 which are coaxially arranged and sequentially communicated from front to back; the diameter of the front end step cylindrical section 41 is larger than that of the communicating section 42, and the front end of the front end step cylindrical section 41 is communicated with an opening inside the front end conducting ring groove 44; the rear end of the rear end step cylindrical section 43 is communicated with the opening at the inner side of the rear end conduction ring groove 45, and the diameter of the rear end step cylindrical section 43 is smaller than the outer diameter of the rear end conduction ring groove 45; the liquid return pipe 71 is communicated with the front end conduction ring groove 44, the back pipe 73 is communicated with the back end conduction ring groove 45, and the forward pipe 72 is communicated with the communicating section 42;
the front end seal portion includes: the outer side surface is used for sealing a circular pipe-shaped front end sealing section 81 which is opened at the inner side of the front end conduction ring groove 44 and a front end sealing section 47 which is used for being in sealing fit with the front end step cylindrical section 41;
the rear end seal portion includes: a cylindrical rear end blocking section 82 with a side surface for blocking the opening inside the rear end conduction ring groove 45 and a rear end sealing section 48 for sealing fit with the rear end step cylindrical section 43;
the front end plugging section 81, the front end sealing section 47, the connecting portion 46, the rear end sealing section 48 and the rear end plugging section 82 are connected in order from front to back;
a conduction gap is formed between the communication section 42 and the connection portion 46, and the length of the communication section 42 is smaller than the length of the connection portion 46.
The outer side surface of the front end plugging section 81 plugs the opening at the inner side of the front end conduction ring groove 44, so that the water flow pressure in the front end conduction ring groove 44 acts on the front end plugging section 81 along the radial direction, and the inertia valve core is not driven to move back and forth in the valve cavity. The side surface of the rear end plugging section 82 is used for plugging the opening at the inner side of the rear end conduction ring groove 45, so that the water flow pressure in the rear end conduction ring groove 45 acts on the rear end plugging section 82 along the radial direction, and the inertia valve core is not driven to move back and forth in the valve cavity.
Specifically, the valve chamber is sequentially communicated from front to back and is coaxially provided with a front end conduction ring groove 44, a front end stepped cylindrical section 41, a cylindrical communication section 42, a rear end stepped cylindrical section 43 and a rear end conduction ring groove 45. The front end conducting ring groove 44 is annular, is open on the inner side and is communicated with the front end step cylindrical section 41. The side wall of the front-end stepped cylindrical section 41 is stepped, and specifically, the diameter of the front-end stepped cylindrical section 41 may be larger than that of the communication section 42 to form a step. The communication section 42 is cylindrical, and the side wall of the rear-end step cylindrical section 43 is stepped, specifically, the diameter of the rear-end step cylindrical section 43 is smaller than the outer diameter of the rear-end conducting annular groove 45, so that the side wall of the rear-end step cylindrical section 43 and the radial wall surface of the front side of the rear-end conducting annular groove 45 are stepped. The rear end conduction ring groove 45 is annular, is open on the inner side and is communicated with the rear end step cylindrical section 43. The front end conduction ring groove 44, the front end step cylindrical section 41, the cylindrical communication section 42, the rear end step cylindrical section 43 and the rear end conduction ring groove 45 are processed in the piston through a numerical control machine tool. The inertia valve core is coaxially provided with a front end plugging section 81, a cylindrical front end sealing section 47, a cylindrical connecting part 46, a cylindrical rear end sealing section 48 and a cylindrical rear end plugging section 82 in sequence from front to back. The diameter of the front end seal section 47 is greater than the diameter of the connection 46 and less than the outer diameter of the front end seal section 81, and the diameter of the rear end seal section 48 is greater than the diameter of the connection 46 and less than the diameter of the rear end seal section 82. The length of the communication section 42 is smaller than the length of the connecting portion 46, so that the inertia valve core can move back and forth in the valve cavity.
When the inertia valve 4 is at the initial position, the front end plugging section 81 is inserted into the front end conduction ring groove 44 to plug the opening at the inner side of the front end conduction ring groove 44, and meanwhile, the front end sealing section 47 is inserted into the front end stepped cylindrical section 41 to limit the movement position of the inertia valve core in the front-back direction in the valve cavity, and the front end conduction ring groove 44 can be further separated from the conduction gap; the front end blocking section 81 and the front end sealing section 47 block the liquid return pipe 71 from the conduction gap. The rear end plugging section 82 is drawn out from the rear end conduction ring groove 45, and simultaneously the rear end sealing section 48 is separated from the rear end step cylindrical section 43, so that an opening at the inner side of the rear end conduction ring groove 45 is opened to be communicated with a conduction gap; the retreating pipe 73 communicates with the conduction gap through the rear-end stepped cylindrical section 43 and the rear-end conduction ring groove 45.
After the inertia valve 4 is switched, the front end plugging section 81 is drawn out from the front end conduction ring groove 44, and the front end sealing section 47 is separated from the front end step cylindrical section 41, so that the opening inside the front end conduction ring groove 44 is opened to communicate with the conduction gap, and the liquid return pipe 71 is communicated with the conduction gap through the front end conduction ring groove 44 and the front end step cylindrical section 41. The rear end plugging section 82 is inserted into the rear end conduction ring groove 45 to plug the opening at the inner side of the rear end conduction ring groove 45, and meanwhile, the rear end sealing section 48 is inserted into the rear end stepped cylindrical section 41 to limit the movement position of the inertia valve core in the front-rear direction in the valve cavity, and the rear end conduction ring groove 45 can be further separated from the conduction gap; the back end blocking section 82 and the back end sealing section 48 isolate the back pipe 73 from the conduction gap.
Further, as shown in fig. 1 to 3, as a specific embodiment of the ultra-high pressure water pump provided by the present invention, the guiding mechanism includes: an annular front end guide cavity 83 at the front end of the valve cavity and in sliding fit with the front end blocking section 81, and a cylindrical rear end guide cavity 84 at the rear end of the valve cavity and in sliding fit with the rear end blocking section 82. The front end plugging section 81 and the rear end plugging section 82 play a guiding role, so that the structure is more compact. Specifically, the front end guide chamber 83 is a circular annular chamber coaxially arranged with the valve chamber, and the rear end guide chamber 84 is a cylindrical chamber coaxially arranged with the valve chamber. The front end plugging section 81 in a round tube shape is inserted into the front end guiding cavity 83 and guided in a sliding fit manner; the rear end guide part 82 is inserted into the rear end guide cavity 84 and guided in a sliding fit; so that the inertia valve core can move back and forth in the valve cavity.
Further, as shown in fig. 1 to 3, as a specific embodiment of the ultra-high pressure water pump provided by the invention, a balance pipe 9 is arranged on the piston and is used for communicating the liquid return cavity 31 with the advancing cavity 33, a liquid return annular groove is arranged on the front end surface of the separation part 21, and the liquid return pipe 71 is communicated with the liquid return annular groove; the rear end face of the power part 23 is provided with an advancing annular groove, and the advancing pipe 72 is communicated with the advancing annular groove; one end of the balance pipe 9 is communicated with the liquid return annular groove, and the other end is communicated with the advancing pipe 72. The balance pipe 9 ensures that the forward cavity 33 keeps a certain flow rate to the liquid return cavity 31, and prevents the hydraulic equipment for providing power liquid from being damaged due to overlarge pressure in the forward cavity 33 after the balance valve is damaged or the piston is blocked. The liquid return annular groove is a circular groove surrounding the axis of the partition part 21, and plays a role in guiding the power liquid, so that the pressure of the power liquid is ensured to uniformly act on the front end surface of the partition part 21; the forward annular groove is an annular groove surrounding the axis of the power part 23, and plays a role in guiding the power liquid, so that the pressure of the power liquid is ensured to uniformly act on the rear end face of the power part 23.
Further, as shown in fig. 1 to 3, as a specific implementation mode of the ultra-high pressure water pump provided by the invention, the compression starting end of the pump body is connected with the hydraulic cylinder, and the compression tail end of the pump body is provided with a water inlet and a water outlet; the axis of the plunger rod 6 is collinear with the axis of the piston; the plunger rod 6 is driven to connect to the piston.
Specifically, the inner end of the plunger pump unit is mounted at the front end or the rear end of the hydraulic cylinder. The inner cavity of the pump body is opened at the compression initial end of the pump body, and the top end of the plunger rod 6 penetrates into the inner cavity of the pump body from the compression initial end of the pump body to form a plunger structure; the tail end of the compression end of the pump body is provided with a closed structure and a water inlet and a water outlet which are of a one-way conduction structure and are respectively used for absorbing water and ejecting high-pressure water. The bottom end of the plunger rod 6 is a driving end and penetrates into the inner cavity of the hydraulic cylinder to be connected with the piston, and along with the movement of the piston, the top end of the plunger rod 6 reciprocates in the inner cavity of the pump body. A sealing structure, such as a sealing ring or the like, is also provided between the plunger rod 6 and the end of the hydraulic cylinder.
Further, as shown in fig. 1 to 3, as a specific embodiment of the ultra-high pressure water pump provided by the present invention, the plunger pump unit has two plunger pump units, and is respectively connected to the front end and the rear end of the hydraulic cylinder. Specifically, the inner side ends of the two plunger pump units are respectively arranged at the front end and the rear end of the hydraulic cylinder, and the axis of the inner cavity of the pump body is collinear with the axis of the inner cavity of the hydraulic cylinder. The top ends of the two plunger rods 6 are inserted into the inner cavity of the pump body from the inner side end of the pump body, and the bottom ends of the two plunger rods 6 penetrate into the inner cavity of the hydraulic cylinder to be connected with the front end and the rear end of the piston respectively; the front end and the rear end of the hydraulic cylinder are respectively provided with a sealing structure, and the sealing structures are sealed between the plunger rod 6 and the front end and the rear end of the hydraulic cylinder. The outer side end of the pump body is provided with a water inlet and a water outlet, and along with the movement of the piston, the top end of the plunger rod 6 performs piston movement in the inner cavity of the pump body; the water inlet and the water outlet at the outer side end of the pump body comprise one-way valves which are respectively used for absorbing water and ejecting high-pressure water.
Further, as shown in fig. 1 to 4, as a specific embodiment of the ultra-high pressure water pump provided by the invention, the pump body comprises a connecting sleeve 51 with a hollow cavity in the inner part and openings at the starting end and the tail end, a sealing body 52 for sealing the opening at the tail end of the connecting sleeve 51, and a gland 53 connected to the tail end of the pump body and used for pressing the sealing body 52 at the opening at the tail end of the connecting sleeve 51; the starting end of the pump body is connected with the hydraulic cylinder; the gland 53 is provided with a through hole; the sealing end of the sealing body 52 seals the opening at the tail end of the connecting sleeve 51 and is provided with a water outlet pipe 57 and a water inlet one-way valve 54 which are communicated with the inner cavity of the connecting sleeve 51, and the connecting end of the sealing body 52 penetrates through the through hole and is provided with a water outlet one-way valve 55 which is communicated with the water outlet pipe 57; the connecting end of the sealing body 52 is in sealing connection with the through hole, and the gland 53 is provided with a water inlet pipe 56 which is communicated with the water inlet check valve 54. Specifically, the sealing body 52 is provided with a water outlet pipe 57 and a water inlet check valve 54, and the end of the sealing body is raised and inserted into the end opening of the pump body. The seal 52 is provided with an annular boss near the end of the closure. A circular through hole is arranged in the middle of the gland 53, and a groove is arranged on one side of the gland 53, which compresses the boss on the sealing body 52. The gland 53 presses the sealing body 52 to the outer end of the inner cavity of the connecting sleeve 51 through the annular boss on the sealing body 52. The connecting end of the sealing body 52 penetrates out of the through hole of the gland 53 and is provided with a water outlet one-way valve 55 communicated with a water outlet pipe 57. The side wall of the connecting end of the sealing body 52 is provided with a first annular groove, the corresponding side wall of the through hole of the gland 53 is provided with a second annular groove which is opposite to the first annular groove, the first annular groove and the second annular groove are matched to form a communication cavity, and a water inlet pipe 56 on the gland 53 is communicated with a water inlet check valve 54 on the sealing body 52 through the communication cavity. The connection end of the sealing body 52 and the through hole on the gland 53 are sealed by a sealing structure, specifically, a sealing ring structure may be adopted, and the sealing structure is disposed on two sides of the communication cavity, so that the communication cavity forms a sealing cavity.
Further, as shown in fig. 1 and 4, as a specific embodiment of the ultra-high pressure water pump provided by the invention, the water outlet check valve 55 is detachably connected with the sealing body 52, and a connector 58 for connecting water equipment is arranged at the water outlet end of the water outlet check valve 55. The water outlet one-way valve 55 is detachably connected with the sealing body 52 through threads, can be replaced at any time after being damaged, and meanwhile, the water outlet one-way valve 55 provided with different types of connectors 58 can be replaced according to different water using equipment, so that the connection is more convenient. For example, the connector 58 may be threaded.
Further, as shown in fig. 1 to 3, as a specific embodiment of the ultra-high pressure water pump provided by the invention, the hydraulic cylinder comprises a tubular cylinder body 15 with two open ends, a tubular cylinder sleeve 16 arranged in the inner cavity of the cylinder body 15, and a cover part 17 covered at two ends of the cylinder body 15; the middle shaft of the cylinder sleeve 16 is coaxially arranged with the middle shaft of the inner cavity of the cylinder body 15; the power fluid inlet 11 and the power fluid outlet 12 are arranged on the side wall of the cylinder body 15, and the cylinder sleeve 16 is positioned between the power fluid inlet 11 and the power fluid outlet 12; the cover 17 is provided with a through hole having a sealing structure. The tubular cylinder body 15 and the cover parts 17 at both ends are assembled into a hydraulic cylinder for easy processing and installation. The inner cavity of the cylinder sleeve 16 forms a liquid return section 14 which is matched with a separation part 21 of the piston, and the part of the inner cavity of the hydraulic cylinder, which is not provided with the cylinder sleeve 16, forms a power section 13 which is matched with a power part 23 of the piston. The cap portion 17 is provided with a through hole for passing through the plunger rod 6 of the plunger pump unit, and a sealing structure is sealed between the plunger rod 6 and the through hole of the cap portion 17.
The technical features not specifically described in the above embodiments may be the same as those in other embodiments.
The positional concepts such as "upper" and "lower" mentioned in the above description of the embodiments should be understood as positional relationships of the embodiments of the present invention in a conventional state, which are merely for clarity of description of the embodiments, and should not be construed as limiting the present invention.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. An ultra-high pressure water pump, comprising:
the hydraulic cylinder is provided with a power fluid inlet (11) and a power fluid outlet (12), wherein the inner cavity of the hydraulic cylinder comprises a power section (13) and a liquid return section (14) which are communicated with each other and are parallel to each other in axis, and the sectional area of the power section (13) is larger than the sectional area of the liquid return section (14);
the piston is arranged in the inner cavity of the hydraulic cylinder and comprises a separation part (21), a main body part (22) and a power part (23) which are sequentially connected from front to back, the cross section area of the power part (23) is larger than that of the separation part (21), the separation part (21) is in sliding sealing fit with the liquid return section (14), the power part (23) is in sliding sealing fit with the power section (13), the separation part (21) and the power part (23) sequentially divide the inner cavity of the hydraulic cylinder into a liquid return cavity (31), a back cavity (32) and a front cavity (33) from front to back, the power liquid inlet (11) is communicated with the back cavity (32), the power liquid outlet (12) is communicated with the front cavity (33), and an inertia valve (4) for enabling the front cavity (33) to be communicated with the liquid return cavity (31) or enabling the front cavity (33) to be communicated with the back cavity (32) is arranged on the piston; the inertia valve (4) comprises a valve cavity, an inertia valve core which is positioned in the valve cavity and reciprocates in the piston movement direction, and a guide mechanism for guiding the inertia valve core in the piston movement direction;
the front end of the valve cavity is provided with a liquid return pipe (71) communicated with the liquid return cavity (31), and the rear end of the valve cavity is respectively provided with a forward pipe (72) communicated with the forward cavity (33) and a backward pipe (73) communicated with the backward cavity (32);
the inertia valve core comprises a front end sealing part for controlling whether the liquid return pipe (71) is communicated with the valve cavity, a rear end sealing part for controlling whether the retreating pipe (73) is communicated with the valve cavity, and a connecting part (46) connected between the front end sealing part and the rear end sealing part; and
the plunger pump unit is connected to the rear end part of the hydraulic cylinder and driven by the piston, and comprises a pump body and a plunger rod (6) arranged in an inner cavity of the pump body; the pump body compression starting end is connected with the hydraulic cylinder, and the pump body compression tail end is provided with a water inlet and a water outlet; the axis of the plunger rod (6) is collinear with the axis of the piston; the driving end of the plunger rod (6) is connected with the piston;
the difference between the sectional area of the power section (13) and the sectional area of the liquid return section (14) is larger than the sectional area of the inner cavity of the pump body.
2. The ultra-high pressure water pump of claim 1, wherein: the valve cavity comprises a front end conduction ring groove (44), a front end step cylindrical section (41), a cylindrical communication section (42), a rear end step cylindrical section (43) and a rear end conduction ring groove (45) which are coaxially arranged and sequentially communicated from front to back; the diameter of the front end step cylindrical section (41) is larger than that of the communicating section (42) when the front end of the front end step cylindrical section (41) is communicated with an opening at the inner side of the front end conducting ring groove (44); the rear end of the rear end step cylindrical section (43) is communicated with an opening at the inner side of the rear end conduction ring groove (45), and the diameter of the rear end step cylindrical section (43) is smaller than the outer diameter of the rear end conduction ring groove (45); the liquid return pipe (71) is communicated with the front end conduction ring groove (44), the backward pipe (73) is communicated with the rear end conduction ring groove (45), and the forward pipe (72) is communicated with the communicating section (42);
the front end seal portion includes: the outer side surface is used for sealing a circular pipe-shaped front end sealing section (81) of the inner side opening of the front end conduction ring groove (44) and a front end sealing section (47) used for being in sealing fit with the front end step cylindrical section (41);
the rear end seal portion includes: a cylindrical rear end blocking section (82) with a side surface for blocking an opening at the inner side of the rear end conduction ring groove (45) and a rear end sealing section (48) for sealing fit with the rear end step cylindrical section (43);
the front end plugging section (81), the front end sealing section (47), the connecting part (46), the rear end sealing section (48) and the rear end plugging section (82) are sequentially connected from front to back;
a conduction gap is formed between the communication section (42) and the connecting part (46), and the length of the communication section (42) is smaller than that of the connecting part (46).
3. The ultra-high pressure water pump of claim 2, wherein: the guide mechanism includes: an annular front end guide cavity (83) positioned at the front end of the valve cavity and in sliding fit with the front end plugging section (81), and a cylindrical rear end guide cavity (84) positioned at the rear end of the valve cavity and in sliding fit with the rear end plugging section (82).
4. The ultra-high pressure water pump of claim 1, wherein: the piston is provided with a balance pipe (9) which is communicated with the liquid return cavity (31) and the advancing cavity (33), the front end surface of the separation part (21) is provided with a liquid return annular groove, and the liquid return pipe (71) is communicated with the liquid return annular groove; the rear end face of the power part (23) is provided with an advancing annular groove, and the advancing pipe (72) is communicated with the advancing annular groove; one end of the balance pipe (9) is communicated with the liquid return annular groove, and the other end of the balance pipe is communicated with the advancing pipe (72).
5. The ultra-high pressure water pump of claim 1, wherein: the plunger pump unit is provided with two plunger pump units and is respectively connected with the front end and the rear end of the hydraulic cylinder.
6. The ultra-high pressure water pump of claim 1, wherein: the pump body comprises a connecting sleeve (51) with a cavity in the interior and openings at the initial end and the final end, a sealing body (52) for sealing the opening at the final end of the connecting sleeve (51), and a gland (53) connected to the final end of the pump body and used for pressing the sealing body (52) at the opening at the final end of the connecting sleeve (51); the starting end of the pump body is connected with the hydraulic cylinder; the gland (53) is provided with a through hole; the sealing body (52) is provided with a sealing end for sealing an opening at the tail end of the connecting sleeve (51) and is provided with a water outlet pipe 57 and a water inlet one-way valve (54) which are communicated with the inner cavity of the connecting sleeve (51), and the connecting end of the sealing body (52) penetrates through the through hole and is provided with a water outlet one-way valve (55) communicated with the water outlet pipe 57; the connecting end of the sealing body (52) is in sealing connection with the through hole, and the gland (53) is provided with a water inlet pipe 56 which is communicated with the water inlet one-way valve (54).
7. The ultra-high pressure water pump of claim 6, wherein: the water outlet one-way valve (55) is detachably connected with the sealing body (52), and a connector (58) for connecting water equipment is arranged at the water outlet end of the water outlet one-way valve (55).
8. The ultra-high pressure water pump of claim 1, wherein: the hydraulic cylinder comprises a tubular cylinder body (15) with two open ends, a tubular cylinder sleeve (16) arranged in the inner cavity of the cylinder body (15) and a sealing cover part (17) sealed at the two ends of the cylinder body (15); the middle shaft of the cylinder sleeve (16) is coaxially arranged with the middle shaft of the inner cavity of the cylinder body (15); the power fluid inlet (11) and the power fluid outlet (12) are arranged on the side wall of the cylinder body (15), and the cylinder sleeve (16) is positioned between the power fluid inlet (11) and the power fluid outlet (12); the cover part (17) is provided with a through hole with a sealing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765790.6A CN107387353B (en) | 2017-08-30 | 2017-08-30 | Ultrahigh pressure water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765790.6A CN107387353B (en) | 2017-08-30 | 2017-08-30 | Ultrahigh pressure water pump |
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| Publication Number | Publication Date |
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| CN107387353A CN107387353A (en) | 2017-11-24 |
| CN107387353B true CN107387353B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710765790.6A Active CN107387353B (en) | 2017-08-30 | 2017-08-30 | Ultrahigh pressure water pump |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111075708A (en) * | 2019-12-26 | 2020-04-28 | 宁波真格液压科技有限公司 | High-pressure water pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202040038U (en) * | 2011-04-29 | 2011-11-16 | 天津市鹏晟机电设备有限公司 | Double-acting hydraulic driving reciprocating plunger pump |
| CN102330649A (en) * | 2011-09-14 | 2012-01-25 | 徐州重型机械有限公司 | Plunger water pump and liquid control system thereof |
| CN102536925A (en) * | 2012-01-05 | 2012-07-04 | 解始建 | Hydraulic automatic reciprocating booster |
| CN106640577A (en) * | 2017-02-23 | 2017-05-10 | 大连华锐重工集团股份有限公司 | Pneumatic opposite acting plunger pump |
| CN207297250U (en) * | 2017-08-30 | 2018-05-01 | 张家口德中钻探机械有限责任公司 | Super-pressure water pump |
-
2017
- 2017-08-30 CN CN201710765790.6A patent/CN107387353B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202040038U (en) * | 2011-04-29 | 2011-11-16 | 天津市鹏晟机电设备有限公司 | Double-acting hydraulic driving reciprocating plunger pump |
| CN102330649A (en) * | 2011-09-14 | 2012-01-25 | 徐州重型机械有限公司 | Plunger water pump and liquid control system thereof |
| CN102536925A (en) * | 2012-01-05 | 2012-07-04 | 解始建 | Hydraulic automatic reciprocating booster |
| CN106640577A (en) * | 2017-02-23 | 2017-05-10 | 大连华锐重工集团股份有限公司 | Pneumatic opposite acting plunger pump |
| CN207297250U (en) * | 2017-08-30 | 2018-05-01 | 张家口德中钻探机械有限责任公司 | Super-pressure water pump |
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| CN107387353A (en) | 2017-11-24 |
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Inventor after: Wang Liming Inventor after: Zuo Jianping Inventor after: Zheng Hailiang Inventor before: Wang Limin Inventor before: Zuo Jianping Inventor before: Zheng Hailiang |
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Effective date of registration: 20230823 Address after: 076250 Zone 210/B, 2nd Floor, Building B, Enterprise Incubation Building, No. 8 Shenkong Road, High tech Industrial Development Zone, Zhangjiakou City, Hebei Province Patentee after: Zhangjiakou Yixian Technology Engineering Co.,Ltd. Address before: No. 1, Fuqiang Road, Xishi Industrial Cluster District, Zhangjiakou City, Hebei Province, 076250 Patentee before: ZHANGJIAKOU DEZHONG DRILLING MACHINERY CO.,LTD. |