CN117489574A - Head assembly and liquid drive diaphragm type compressor - Google Patents
Head assembly and liquid drive diaphragm type compressor Download PDFInfo
- Publication number
- CN117489574A CN117489574A CN202410001573.XA CN202410001573A CN117489574A CN 117489574 A CN117489574 A CN 117489574A CN 202410001573 A CN202410001573 A CN 202410001573A CN 117489574 A CN117489574 A CN 117489574A
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- China
- Prior art keywords
- oil
- valve
- membrane head
- plunger pump
- reversing valve
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- 239000007788 liquid Substances 0.000 title claims abstract description 17
- 239000012528 membrane Substances 0.000 claims abstract description 218
- 230000007246 mechanism Effects 0.000 claims abstract description 117
- 230000006837 decompression Effects 0.000 claims abstract description 30
- 230000006835 compression Effects 0.000 claims abstract description 24
- 238000007906 compression Methods 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims description 309
- 239000010720 hydraulic oil Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 13
- 230000001502 supplementing effect Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 43
- 239000001257 hydrogen Substances 0.000 abstract description 27
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 27
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 22
- 238000011084 recovery Methods 0.000 abstract description 10
- 238000005984 hydrogenation reaction Methods 0.000 abstract description 7
- 150000002431 hydrogen Chemical class 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/053—Pumps having fluid drive
- F04B45/0533—Pumps having fluid drive the fluid being actuated directly by a piston
-
- 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
- F04B25/00—Multi-stage pumps
- F04B25/005—Multi-stage pumps with two cylinders
-
- 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
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/053—Pumps having fluid drive
- F04B45/0536—Pumps having fluid drive the actuating fluid being controlled by one or more valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention provides a machine head assembly and a liquid drive diaphragm type compressor, and relates to the technical field of diaphragm compressors, comprising a primary diaphragm head mechanism, a secondary diaphragm head mechanism, a decompression cylinder, a reversing valve and a plunger pump; the multi-stage compression principle is utilized, gas enters the primary membrane head mechanism from the gas path system, the air inlet pressure is 2MPa, the plunger pump is utilized to apply work to compress the gas to 8-10 MPa through the decompression cylinder and then discharge the compressed gas to the secondary membrane head mechanism, the secondary membrane head mechanism applies work to compress the gas to 45MPa based on the plunger pump, the flexibility of the hydrogen production-hydrogenation integrated station is improved, the application scene of the compressor is expanded, the function of residual hydrogen recovery of the station liquid drive diaphragm type compressor is realized, and the cost is saved; the technical problems that in the prior art, the membrane compressor cannot recover residual hydrogen, a filling machine needs to be added, the cost is increased, and the field of the filling machine is limited are solved.
Description
Technical Field
The invention relates to the technical field of diaphragm compressors, in particular to a machine head assembly and a liquid drive diaphragm compressor.
Background
The diaphragm compressor is a compressor which separates oil and gas by using a diaphragm, and when the diaphragm compressor does work, high-pressure oil on one side of the diaphragm pushes the diaphragm to compress gas on the other side. The diaphragm compressor has the characteristics of good tightness and large pressure ratio, so that the diaphragm compressor is widely applied to the hydrogen energy industry, and particularly a hydrogen station is one of important application fields. The liquid-driven diaphragm compressor is a novel diaphragm compressor which appears in recent years, the traditional diaphragm compressor uses a motor to push a piston through a crankshaft connecting rod structure to generate high-pressure hydraulic oil, and the liquid-driven diaphragm compressor does not use the crankshaft connecting rod structure to push the piston, but instead, the high-pressure plunger pump generates the high-pressure hydraulic oil to directly push a diaphragm. Compared with the traditional piston diaphragm compressor, the novel diaphragm compressor has smaller volume and more flexible arrangement, and meanwhile, the reliability is improved and the failure rate is reduced because of no crankshaft connecting rod and piston structure.
In the prior art, hydrogen transported by a tube bundle vehicle is generally used as a hydrogen source in a hydrogenation station, and the highest pressure of the tube bundle vehicle filled with hydrogen is generally about 20 MPa; the suction pressure of a diaphragm compressor for a hydrogenation station is generally 5-20MPa, and the diaphragm compressor sucks hydrogen in a tube bundle vehicle during hydrogenation, and the minimum suction pressure can only reach 5MPa, so that the pressure of the hydrogen is also 5MPa when the tube bundle vehicle returns to a gas station, and the hydrogen cannot be utilized, so that a part of transportation efficiency of the tube bundle vehicle is lost. If the pressure in the tube bundle trolley can be reduced to 1-2MPa, the transportation efficiency of the tube bundle trolley can be improved. The use of hydrogen under 5MPa is called residual hydrogen recovery, and if residual hydrogen is to be recovered in a hydrogenation station, a filling machine (rated suction pressure is 1-2 MPa) is required to be purchased in the prior art, which leads to an increase in cost.
Disclosure of Invention
The invention aims to provide a machine head assembly and a liquid drive diaphragm type compressor, which are used for solving the technical problems that in the prior art, a station compressor cannot recover residual hydrogen, a filling machine needs to be added, so that the cost is increased and the field of the filling machine is limited.
The invention provides a machine head assembly, which comprises: the device comprises a first-stage membrane head mechanism, a second-stage membrane head mechanism, a pressure reducing cylinder, a reversing valve and a plunger pump;
The plunger pump is respectively connected with the pressure reducing cylinder and the second-level membrane head mechanism through the reversing valve, the pressure reducing cylinder is connected with the first-level membrane head mechanism, the reversing valve is used for alternately leading high-pressure oil output by the plunger pump to the pressure reducing cylinder and the second-level membrane head mechanism for acting, and the pressure reducing cylinder is used for compressing gas of the first-level membrane head mechanism;
the primary membrane head mechanism is connected with the secondary membrane head mechanism, and compressed gas output by the primary membrane head mechanism can be conveyed to the secondary membrane head mechanism.
In a preferred embodiment of the present invention, the present invention further comprises a first oil path and a second oil path;
the reversing valve is communicated with the pressure reducing cylinder through the first oil way and is used for conveying high-pressure oil output by the plunger pump to the pressure reducing cylinder through the first oil way;
the second-stage membrane head mechanism comprises a first membrane head and a second membrane head; the reversing valve is communicated with the first membrane head and the second membrane head through the second oil way respectively, the reversing valve is used for conveying high-pressure oil output by the plunger pump to the first membrane head and the second membrane head through the second oil way respectively, and the reversing valve is used for alternately feeding oil into and discharging oil from the first oil way and the second oil way.
In a preferred embodiment of the present invention, the present invention further comprises a first reversing valve switching block;
the first reversing valve adapter comprises a first oil passing channel, a first conveying channel, a second oil passing channel and a third oil passing channel; two ends of the first oil passing channel are respectively communicated with a working port of the reversing valve and the first membrane head, one end of the second oil passing channel is communicated with the first oil passing channel through the first conveying channel, and the other end of the second oil passing channel is communicated with the second membrane head;
and two ends of the third oil passage are respectively communicated with the other working port of the reversing valve and the pressure reducing cylinder.
In the preferred embodiment of the invention, the electromagnetic reversing valve is also included;
the electromagnetic reversing valve adopts a two-position five-way electromagnetic valve, the two-position five-way electromagnetic valve is respectively communicated with two working ports of the reversing valve, a pressure reducing cylinder, a first membrane head and a second membrane head, and the two-position five-way electromagnetic valve is used for adjusting the primary membrane head mechanism and the secondary membrane head mechanism to form secondary compression, or the two-position five-way electromagnetic valve is used for adjusting the secondary membrane head mechanism to form primary compression.
In a preferred embodiment of the present invention, the present invention further comprises a first oil path and a second oil path;
The second-stage membrane head mechanism comprises a first membrane head and a second membrane head; the reversing valve is communicated with the pressure reducing cylinder and the first membrane head in sequence through the first oil way, the reversing valve is communicated with the second membrane head through the second oil way, the reversing valve is used for conveying high-pressure oil output by the plunger pump to the pressure reducing cylinder and the first membrane head in sequence through the first oil way, the reversing valve is used for conveying high-pressure oil output by the plunger pump to the second membrane head through the second oil way, and the reversing valve is used for alternately feeding and discharging oil to the first oil way and the second oil way.
In a preferred embodiment of the invention, the reversing valve comprises a valve body, a valve sleeve, a valve core and an end cover;
the valve sleeve is sleeved outside the valve core, the end cover is positioned at the end part of the valve body, the end cover is in sealing connection with the valve body so as to form a sealing space inside the valve body, and the valve sleeve is positioned inside the sealing space of the valve body;
the valve body is sequentially provided with a first oil inlet, a first oil return port, a first working port, a second working port and a third working port, and a first annular groove is formed along the inner wall of the sealing space and corresponds to the first oil inlet, the first oil return port, the first working port, the second working port and the third working port;
The valve sleeve is provided with a plurality of second oil inlets and second oil return openings corresponding to the first oil inlets and the first oil return openings, the second oil inlets are uniformly formed in a plurality of second oil inlets along the circumferential direction of the valve sleeve, the second oil inlets are communicated with first annular grooves corresponding to the first oil inlets, two second oil inlets which are arbitrarily opposite are symmetrically arranged, the second oil return openings are uniformly formed in a plurality of second oil return openings along the circumferential direction of the valve sleeve, the second oil return openings are communicated with first annular grooves corresponding to the first oil return openings, and the two second oil return openings which are arbitrarily opposite are symmetrically arranged;
the valve sleeve is provided with a fourth working port, a fifth working port and a sixth working port corresponding to the first working port, the second working port and the third working port, the fifth working port comprises a first branch port and a second branch port, a first valve core flow passage and a second valve core flow passage are axially arranged along the valve core, the fourth working port, the second oil inlet and the first branch port can be communicated through the first valve core flow passage, the sixth working port, the second oil return port and the second branch port can be communicated through the second valve core flow passage, the cross-sectional areas of the first branch port and the second branch port are different, the cross-sectional area of the fourth working port is correspondingly arranged with the cross-sectional area of the first branch port, and the cross-sectional area of the fifth working port is correspondingly arranged with the cross-sectional area of the second branch port so as to adjust the distribution of working oil quantity of the reversing valve;
The first valve core flow channels and the second valve core flow channels are arranged in a staggered mode along the circumferential direction of the valve core, the first valve core flow channels and the second valve core flow channels are both arranged in two, the two first valve core flow channels are symmetrically arranged relative to the axis of the valve core, the two second valve core flow channels are symmetrically arranged relative to the axis of the valve core, and the valve core is rotationally connected with the valve sleeve so that the reversing valve alternately discharges oil and discharges oil.
In a preferred embodiment of the present invention, the present invention further comprises a second reversing valve switching block;
the second reversing valve adapter comprises a fourth oil passing channel, a second conveying channel, a fifth oil passing channel, a sixth oil passing channel and a seventh oil passing channel; the fourth oil passage is respectively communicated with the first working port and the second membrane head, one end of the fifth oil passage is communicated with the fourth oil passage through a second conveying passage, and the other end of the fifth oil passage is communicated with the third working port;
one end of the sixth oil passage and one end of the seventh oil passage are communicated with the second working port, the other end of the sixth oil passage is communicated with the decompression cylinder, and the other end of the seventh oil passage is communicated with the first membrane head.
In the preferred embodiment of the invention, the device also comprises a pump outlet block, an overflow valve and an oil supplementing mechanism;
the plunger pump is connected with the reversing valve through the pump outlet block, the overflow valve and the oil supplementing mechanism are both arranged on the pump outlet block, the overflow valve can be opened when the primary membrane head mechanism or the secondary membrane head mechanism is exhausted, so that redundant hydraulic oil can be discharged to an oil tank, and the oil supplementing mechanism is used for supplementing oil to the plunger pump.
In a preferred embodiment of the present invention, the plunger pump includes a first plunger pump, a second plunger pump, a coupling, and a plunger pump connection block;
the first plunger pump is connected with the second plunger pump through the coupler, the first plunger pump and the second plunger pump are communicated in parallel through the plunger pump connecting block, and the first plunger pump or the second plunger pump is connected with the reversing valve through the pump outlet block.
The invention provides a liquid-driven diaphragm type compressor, which comprises a machine head assembly.
The invention provides a handpiece assembly, comprising: the device comprises a first-stage membrane head mechanism, a second-stage membrane head mechanism, a pressure reducing cylinder, a reversing valve and a plunger pump; by utilizing the multistage compression principle, gas enters a first-stage membrane head mechanism from a gas path system, the air inlet pressure is about 2MPa, a plunger pump is utilized to apply work to compress the gas to 8-10 MPa through a decompression cylinder and then discharge the compressed gas to a second-stage membrane head mechanism, the second-stage membrane head mechanism applies work to compress the gas to about 45MPa based on the plunger pump, the flexibility of a hydrogen production-hydrogenation integrated station can be greatly improved, the application scene of the compressor is expanded, the function of residual hydrogen recovery of the station liquid-driven diaphragm type compressor is realized, and the cost is saved; the technical problems that the station compressor in the prior art cannot recover residual hydrogen, a filling machine needs to be added, the cost is increased, and the filling machine is limited in field are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a handpiece assembly according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a handpiece assembly employing two stages of compression in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a nose assembly according to an embodiment of the present invention employing two stages of compression based on two plunger pumps;
FIG. 4 is a schematic structural view of a first reversing valve adapter of a head assembly according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of the electromagnetic directional valve of the nose assembly provided in the embodiment of the present invention when the electromagnetic directional valve is located at the right position;
FIG. 6 is a schematic structural diagram of the electromagnetic directional valve of the nose assembly according to the embodiment of the present invention in the left position;
FIG. 7 is a schematic diagram of a handpiece assembly employing three stages of compression in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of a handpiece assembly provided by an embodiment of the present invention employing three stages of compression based on two plunger pumps;
FIG. 9 is a schematic diagram of a reversing valve in a three-stage compression mode for a nose assembly according to an embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of a reversing valve of the handpiece assembly provided by the embodiment of FIG. 9;
FIG. 11 is a schematic cross-sectional view of the valve housing of the reversing valve of the handpiece assembly provided by the embodiment of FIG. 9;
FIG. 12 is a schematic illustration of the construction of the spool of the reversing valve of the head assembly provided by the embodiment of FIG. 9;
FIG. 13 is a schematic view of a second reversing valve adapter of a head assembly according to an embodiment of the present disclosure;
FIG. 14 is a schematic diagram of a universal station diaphragm compressor-based retrofit for a hand piece assembly according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a handpiece assembly employing a large displacement plunger pump according to an embodiment of the present invention.
Icon: 100-a first-stage membrane head mechanism; 200-a secondary membrane head mechanism; 201-a first membrane head; 202-a second membrane head; 300-a decompression cylinder; 400-reversing valve; 401-valve body; 411-a first oil inlet; 421-a first oil return port; 431-a first work port; 441-a second work port; 451-a third work port; 402-valve sleeve; 412-a second oil inlet; 422-a second oil return port; 432-fourth work port; 442-a fifth work port; 4421-first branch; 4422-second branch; 452-sixth work port; 403-valve core; 413-a first spool flow passage; 423-a second spool flow passage; 404-end cap; 500-plunger pump; 501-a first plunger pump; 502-a second plunger pump; 503-coupling; 504-plunger pump connecting block; 600-a first reversing valve switching block; 601-a first oil passage; 602-a first delivery channel; 603-a second oil passage; 604-a third oil passage; 700-a second reversing valve switching block; 701-fourth oil passage; 702-a second delivery channel; 703-fifth oil passage; 704-a sixth oil passage; 705-seventh oil passage; 800-pump outlet block; 900-overflow valve; 110-a normally open one-way valve; 120-an oil supplementing mechanism; 130-electromagnetic directional valve.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 15, the present embodiment provides a handpiece assembly, including: the device comprises a primary membrane head mechanism 100, a secondary membrane head mechanism 200, a decompression cylinder 300, a reversing valve 400 and a plunger pump 500; the plunger pump 500 is respectively connected with the decompression cylinder 300 and the secondary membrane head mechanism 200 through the reversing valve 400, the decompression cylinder 300 is connected with the primary membrane head mechanism 100, the reversing valve 400 is used for alternately leading high-pressure oil output by the plunger pump 500 to the decompression cylinder 300 and the secondary membrane head mechanism 200 to apply work, and the decompression cylinder 300 is used for compressing gas of the primary membrane head mechanism 100; the primary membrane head mechanism 100 is connected with the secondary membrane head mechanism 200, and compressed gas output by the primary membrane head mechanism 100 can be conveyed to the secondary membrane head mechanism 200.
The hydraulic diaphragm type compressor integrating the residual hydrogen recovery function of the tube bundle vehicle comprises a machine head assembly, a motor, an oil circuit system, an air circuit system, an electric control system and a waterway system; because in this embodiment, the other parts except the head assembly have the same structure as the existing liquid-driven diaphragm compressor, the other parts except the head assembly in the compressor are not described in detail in this embodiment; the nose assembly provided by the embodiment can realize multistage compression of gas, wherein the primary membrane head mechanism 100 can receive initial gas through a gas circuit system, the inlet pressure of the initial gas can be about 2MPa, the plunger pump 500 can do work on the primary membrane head mechanism 100 through the decompression cylinder 300 to compress the gas, specifically, the decompression cylinder 300 can be connected with the primary membrane head mechanism 100 through the decompression cylinder 300 switching block, the decompression cylinder 300 can convert high-pressure low-flow hydraulic oil into low-pressure high-flow hydraulic oil, the principle that the piston area difference inside the decompression cylinder 300 and the stress on two sides of the piston are balanced is utilized, the piston area of the decompression cylinder 300 close to the primary membrane head mechanism 100 is large, the piston area close to the plunger pump 500 is small, the membrane cavity of the primary membrane head mechanism 100 is large, the required oil quantity is large, and the problems that the displacement of the plunger pump 500 and the flow of the hydraulic oil required by the primary membrane head mechanism 100 are not matched are solved; further, the gas compressed by the primary membrane head mechanism 100 then enters the secondary membrane head mechanism 200, the secondary membrane head mechanism 200 can compress the gas based on the work of the plunger pump 500, and the exhaust pressure compressed by the secondary membrane head mechanism 200 can reach about 45 MPa.
Further, the plunger pump 500 can alternately lead high-pressure oil to the primary membrane head mechanism 100 and the secondary membrane head mechanism 200 through the reversing valve 400, respectively, and the primary membrane head mechanism 100 and the secondary membrane head mechanism 200 can alternately compress gas to do work.
The handpiece assembly provided in this embodiment includes: the device comprises a primary membrane head mechanism 100, a secondary membrane head mechanism 200, a decompression cylinder 300, a reversing valve 400 and a plunger pump 500; by utilizing the multistage compression principle, gas enters the first-stage membrane head mechanism 100 from the gas path system, the gas inlet pressure is about 2MPa, the plunger pump 500 is utilized to apply work to compress the gas to 8-10 MPa through the decompression cylinder 300 and then discharge the compressed gas to the second-stage membrane head mechanism 200, the second-stage membrane head mechanism 200 is based on the plunger pump 500 to apply work to compress the gas to about 45MPa, the flexibility of a hydrogen production-hydrogenation integrated station can be greatly improved, the application scene of the compressor is expanded, the function of residual hydrogen recovery of the station liquid-driven diaphragm type compressor is realized, and the cost is saved; the technical problems that the station compressor in the prior art cannot recover residual hydrogen, a filling machine needs to be added, the cost is increased, and the filling machine is limited in field are solved.
As shown in fig. 2-3, further, in the preferred embodiment of the present invention, the present invention further includes a first oil path and a second oil path on the basis of the above embodiments; the reversing valve 400 is communicated with the pressure reducing cylinder 300 through a first oil path, and the reversing valve 400 is used for conveying high-pressure oil output by the plunger pump 500 to the pressure reducing cylinder 300 through the first oil path; the secondary membrane head mechanism 200 comprises a first membrane head 201 and a second membrane head 202; the reversing valve 400 is respectively communicated with the first membrane head 201 and the second membrane head 202 through a second oil path, the reversing valve 400 is used for respectively conveying high-pressure oil output by the plunger pump 500 to the first membrane head 201 and the second membrane head 202 through the second oil path, and the reversing valve 400 is used for alternately feeding and discharging oil to and from the first oil path and the second oil path.
In this embodiment, the first-stage membrane head mechanism 100 and the second-stage membrane head mechanism 200 can implement two-stage compression, wherein compressed gas discharged from the first-stage membrane head mechanism 100 can be respectively delivered to the first membrane head 201 and the second membrane head 202, specifically, the plunger pump 500 can respectively deliver high-pressure oil to the pressure reducing cylinder 300 through a first oil path, and high-pressure oil is delivered to the second-stage membrane head mechanism 200 through a second oil path, wherein the first-stage membrane head mechanism 100 converts the high-pressure oil of the plunger pump 500 into low-pressure high-flow hydraulic oil through the pressure reducing cylinder 300, the first-stage membrane head mechanism 100 compresses the initial gas pressure by about 2MPa, compressed gas with the exhaust pressure reaching 8MPa-10MPa enters the first membrane head 201 and the second membrane head 202, the plunger pump 500 can simultaneously deliver the high-pressure oil to the first membrane head 201 and the second membrane head 202, and the first membrane head 201 can synchronously perform work to compress the gas of 8MPa-10MPa, and in this process, the first membrane head 201 and the second membrane head 202 can alternately perform work to compress the gas by using the first-stage membrane head mechanism 100 and the second membrane head mechanism 100 as an integral structure.
As shown in fig. 4, in the preferred embodiment of the present invention, a first reversing valve adapter 600 is further included; the first reversing valve adapter 600 includes a first oil passage 601, a first delivery passage 602, a second oil passage 603, and a third oil passage 604; two ends of the first oil passing channel 601 are respectively communicated with one working port of the reversing valve 400 and the first membrane head 201, one end of the second oil passing channel 603 is communicated with the first oil passing channel 601 through a first conveying channel 602, and the other end of the second oil passing channel 603 is communicated with the second membrane head 202; both ends of the third oil passing passage 604 communicate with the other working port of the reversing valve 400 and the decompression cylinder 300, respectively.
In this embodiment, based on two-stage compression of the first-stage membrane head mechanism 100 and the second-stage membrane head mechanism 200, the first reversing valve adapter 600 is capable of conveying hydraulic oil output by the plunger pump 500 to the pressure reducing cylinder 300 and the first membrane head 201 and the second membrane head 202 of the second-stage membrane head mechanism 200, respectively, wherein the third oil passage 604 is used as an independent oil conveying passage, an inlet of the third oil passage 604 is connected with one working port of the reversing valve 400, and an outlet of the third oil passage 604 is connected with the pressure reducing cylinder 300 to complete oil conveying of the third oil passage 604 by one working port of the reversing valve 400; the first oil passage 601 and the second oil passage 603 serve as oil transportation passages for the first membrane head 201 and the second membrane head 202 of the two-stage membrane head mechanism 200, an inlet of the first oil passage 601 is connected with the other working port of the reversing valve 400, an inlet of the second oil passage 603 is connected with the first oil passage 601 through a first conveying passage 602, an outlet of the first oil passage 601 is connected with the first membrane head 201, an outlet of the second oil passage 603 is connected with the second membrane head 202, namely the other working port of the reversing valve 400 can convey high-pressure oil through the inlet of the first oil passage 601, and the second oil passage 603 and the first oil passage 601 synchronously convey the high-pressure oil to the first membrane head 201 and the second membrane head 202 respectively.
As shown in fig. 5-6, in the preferred embodiment of the present invention, an electromagnetic directional valve 130 is further included; the electromagnetic reversing valve 130 adopts a two-position five-way electromagnetic valve, the two-position five-way electromagnetic valve is respectively communicated with two working ports of the reversing valve 400, the pressure reducing cylinder 300, the first membrane head 201 and the second membrane head 202, and the two-position five-way electromagnetic valve is used for adjusting the primary membrane head mechanism 100 and the secondary membrane head mechanism 200 to form secondary compression, or the two-position five-way electromagnetic valve is used for adjusting the secondary membrane head mechanism 200 to form primary compression.
In the embodiment, improvement is performed on the basis of two-stage compression, and by replacing the first reversing valve switching block 600 with one electromagnetic reversing valve 130, the switching of functions of the residual hydrogen recovery compressor and the station compressor can be realized without modification, and the displacement can be reduced by about half when the residual hydrogen recovery function is realized compared with the station compressor function; specifically, the two-position five-way electromagnetic valve is provided with 5 interfaces which are A, B, 1, 2 and 3 respectively. Wherein the A, B interface is respectively connected with two working ports of the reversing valve 400; interface 1 is connected with first-stage membrane head mechanism 100, interface 2 is connected with first membrane head 201, and interface 3 is connected with second membrane head 202; when the compressor realizes the residual hydrogen recovery function, the two-position five-way electromagnetic valve is at the right position, at this time, the first-stage membrane head mechanism 100 and the second membrane head 202 are respectively connected with two working ports of the reversing valve 400, the two membrane heads work, and the first membrane head 201 is disconnected. At this time, the first-stage membrane head mechanism 100 and the second membrane head 202 are connected in series on the air path to realize two-stage compression, the first-stage membrane head mechanism 100 is at a first stage, and the second membrane head 202 is at a second stage; when the compressor realizes the station compressor function, the electromagnetic directional valve 130 is in the left position, and at this time, the primary membrane head mechanism 100 is disconnected, and the first membrane head 201 and the second membrane head 202 are respectively connected to two working ports of the directional valve 400, and the two membrane heads work. At this time, the first membrane head 201 and the second membrane head 202 are connected in parallel on the air path, so as to realize primary compression. Therefore, the compressor can flexibly realize the switching of the residual hydrogen recovery function and the station compressor function by controlling the connection of the two-position five-way electromagnetic valve and the air passage.
As shown in fig. 7-8, in a preferred embodiment of the present invention, the present invention further includes a first oil path and a second oil path; the secondary membrane head mechanism 200 comprises a first membrane head 201 and a second membrane head 202; the reversing valve 400 is sequentially communicated with the decompression cylinder 300 and the first membrane head 201 through a first oil path, the reversing valve 400 is communicated with the second membrane head 202 through a second oil path, the reversing valve 400 is used for sequentially conveying high-pressure oil output by the plunger pump 500 to the decompression cylinder 300 and the first membrane head 201 through the first oil path, the reversing valve 400 is used for conveying high-pressure oil output by the plunger pump 500 to the second membrane head 202 through the second oil path, and the reversing valve 400 is used for alternately feeding and discharging oil into and from the first oil path and the second oil path.
In this embodiment, the primary membrane head mechanism 100 and the secondary membrane head mechanism 200 can implement three-stage compression, where compressed gas discharged from the primary membrane head mechanism 100 can be delivered to the second membrane head 202, compressed gas discharged from the second membrane head 202 can be delivered to the first membrane head 201, specifically, the plunger pump 500 can sequentially deliver high-pressure oil to the decompression cylinder 300 and the first membrane head 201 through the first oil path, and high-pressure oil can be delivered to the second membrane head 202 through the second oil path, where the primary membrane head mechanism 100 converts the high-pressure oil of the plunger pump 500 into low-pressure high-flow hydraulic oil through the decompression cylinder 300, the primary gas compression is completed by the primary membrane head mechanism 100, the compressed gas is delivered to the second membrane head 202, the compressed gas is acted on by the second membrane head 202 through the high-pressure oil by the plunger pump 500, the compressed gas is delivered to the first membrane head 201, the first membrane head 201 can receive the high-pressure oil delivered through the first oil path, and the compressed gas discharged from the second membrane head 202 can be compressed by the first membrane head 201, and three-stage compression is completed; it should be noted that the volume of the membrane chamber of the first membrane head 201 is correspondingly reduced to match the oil volume of the plunger pump 500 and the volumes of the other two membrane heads.
As shown in fig. 9-12, in a preferred embodiment of the present invention, a reversing valve 400 includes a valve body 401, a valve housing 402, a valve spool 403, and an end cap 404; the valve sleeve 402 is sleeved outside the valve core 403, the end cover 404 is positioned at the end part of the valve body 401, the end cover 404 is in sealing connection with the valve body 401, so that a sealing space is formed inside the valve body 401, and the valve sleeve 402 is positioned inside the sealing space of the valve body 401; the valve body 401 is provided with a first oil inlet 411, a first oil return port 421, a first working port 431, a second working port 441 and a third working port 451 in sequence, and a first annular groove is formed along the inner wall of the sealed space corresponding to the first oil inlet 411, the first oil return port 421, the first working port 431, the second working port 441 and the third working port 451; the valve sleeve 402 is provided with a plurality of second oil inlets 412 and second oil return ports 422 corresponding to the first oil inlets 411 and the first oil return ports 421, the second oil inlets 412 are uniformly provided with a plurality of second oil inlets 412 along the circumferential direction of the valve sleeve 402, the plurality of second oil inlets 412 are communicated with the first annular grooves corresponding to the first oil inlets 411, two second oil inlets 412 which are arbitrarily opposite are symmetrically arranged, the second oil return ports 422 are uniformly provided with a plurality of second oil return ports 422 along the circumferential direction of the valve sleeve 402, the plurality of second oil return ports 422 are communicated with the first annular grooves corresponding to the first oil return ports 421, and the two second oil return ports 422 which are arbitrarily opposite are symmetrically arranged; the valve sleeve 402 is provided with a fourth working port 432, a fifth working port 442 and a sixth working port 452 corresponding to the first working port 431, the second working port 441 and the third working port 451, the fifth working port 442 comprises a first branch port 4421 and a second branch port 4422, a first spool flow passage 413 and a second spool flow passage 423 are axially arranged along the spool 403, the fourth working port 432, a second oil inlet 412 and the first branch port 4421 can be communicated through the first spool flow passage 413, the sixth working port 452, a second oil return port 422 and the second branch port 4422 can be communicated through the second spool flow passage 423, the cross-sectional areas of the first branch port 4421 and the second branch port 4422 are different, the cross-sectional area of the fourth working port 432 is correspondingly arranged with the cross-sectional area of the first branch port 4421, and the cross-sectional area of the fifth working port 442 is correspondingly arranged with the cross-sectional area of the second branch port 4422 so as to adjust the distribution of the working oil amount of the reversing valve 400; the first spool flow channel 413 and the second spool flow channel 423 are arranged in a staggered manner along the circumferential direction of the spool 403, the first spool flow channel 413 and the second spool flow channel 423 are both provided with two, the two first spool flow channels 413 are symmetrically arranged relative to the axis of the spool 403, the two second spool flow channels 423 are symmetrically arranged relative to the axis of the spool 403, and the spool 403 is rotationally connected with the valve sleeve 402, so that the reversing valve 400 alternately discharges oil and discharges oil.
In this embodiment, the reversing valve 400 is a rotary reversing valve, where the first working port 431 and the third working port 451 may be used as a working port B with the same function, the second working port 441 is a working port a, and the reversing valve 400 performs the following functions: and alternately distributing an oil discharge port and an oil suction port of the pump to the two working ports A and B respectively, and realizing that the oil outlet time of the working port A is longer than that of the working port B, wherein the oil outlet time of the A/B is equal to the oil return time of the B/A port.
Specifically, a valve housing 402 is installed inside the valve body 401, and a valve spool 403 is installed inside; the outside of the valve body 401 is provided with a plurality of windows which are used for communicating with the flow channels of the valve body 401, each window is circumferentially symmetrically arranged, and a sealing groove is arranged on the outer circle for installing sealing elements in order to ensure the sealing between each flow channel; the fourth working port 432, the first branch port 4421, the second branch port 4422 and the sixth working port 452 can adopt square windows, the fourth working port 432 is a small window, the first branch port 4421 is a large window, the second branch port 4422 is a small window, the sixth working port 452 is a large window, the size of the windows is used for determining the flow time, and then the oil mass distribution of the two working channels is determined; the outer circle of the valve core 403 is provided with four axial liquid passing grooves, which are respectively two groups of first valve core flow passages 413 and second valve core flow passages 423, and are respectively connected with an oil inlet and an oil return port of the valve body 401 through two annular grooves in the valve sleeve 402. The width of the liquid passing groove is the same as the circumferential distance a between the large and small square windows of the valve sleeve 402, and the second working port 441 can alternately discharge and return oil to the first working port 431 and the third working port 451 by the rotation of the valve core 403.
As shown in fig. 13, in the preferred embodiment of the present invention, a second reversing valve adapter block 700 is further included; the second reversing valve switching block 700 includes a fourth oil passage 701, a second delivery passage 702, a fifth oil passage 703, a sixth oil passage 704, and a seventh oil passage 705; the fourth oil passage 701 is respectively communicated with the first working port 431 and the second membrane head 202, one end of the fifth oil passage 703 is communicated with the fourth oil passage 701 through the second conveying passage 702, and the other end of the fifth oil passage 703 is communicated with the third working port 451; one end of the sixth oil passage 704 and one end of the seventh oil passage 705 are both communicated with the second operation port 441, the other end of the sixth oil passage 704 is communicated with the pressure reducing cylinder 300, and the other end of the seventh oil passage 705 is communicated with the first membrane head 201.
In this embodiment, based on three-stage compression of the first-stage membrane head mechanism 100, the first membrane head 201 and the second membrane head 202, the second reversing valve adapter 700 is capable of conveying hydraulic oil output by the plunger pump 500 to the pressure reducing cylinder 300, the first membrane head 201 and the second membrane head 202 respectively, wherein the sixth oil passage 704 and the seventh oil passage 705 have the same inlet, the inlets of the sixth oil passage 704 and the seventh oil passage 705 are both communicated with the second working port 441, the outlet of the sixth oil passage 704 is connected with the pressure reducing cylinder 300, the outlet of the seventh oil passage 705 is connected with the first membrane head 201, and high-pressure oil conveying of one working port of the reversing valve 400 to the first oil path is completed; the inlet of the fifth oil passage 703 is communicated with the third working port 451, the outlet of the fifth oil passage 703 is communicated with the second delivery passage 702, the inlet of the fourth oil passage 701 is communicated with the first working port 431, that is, the high-pressure oil of the first working port 431 and the third working port 451 is delivered to the second membrane head 202 through the fourth oil passage 701 and the fifth oil passage 703, respectively, and the working port completing one function of the reversing valve 400 delivers the high-pressure oil of the second oil path.
In the preferred embodiment of the present invention, the pump further comprises a pump outlet block 800, an overflow valve 900, a normally open check valve 110 and an oil replenishing mechanism 120; plunger pump 500 is connected with reversing valve 400 through pump outlet block 800, and overflow valve 900, normally open check valve 110 and oil make-up mechanism 120 are all installed on pump outlet block 800, and overflow valve 900 can be opened when primary membrane head mechanism 100 or secondary membrane head mechanism 200 exhaust is finished to let unnecessary hydraulic oil to the oil tank, and normally open check valve 110 is used for letting out high temperature hydraulic oil in the oil return process, and oil make-up mechanism 120 is used for making up oil to plunger pump 500.
In this embodiment, the number of plunger pumps 500 may be one or two; when the number of the plunger pumps 500 is one, a single plunger pump 500 can perform high-pressure oil delivery to the small membrane head; when two plunger pumps 500 are used, the two plunger pumps 500 are connected in parallel, that is, the two plunger pumps 500 are used for supplying oil to the system at the same time, so that sufficient oil quantity is provided for the system.
Further, the pump outlet block 800 is used as a base structure of the plunger pump 500, and the overflow valve 900, the normally open check valve 110 and the oil supplementing mechanism 120 are mounted on the pump outlet block 800; the overflow valve 900 is opened when the membrane head exhaust is finished, and the excessive hydraulic oil is discharged to the oil tank; the relief valve 900 serves to avoid excessive oil pressure in the entire hydraulic system and protect the hydraulic system, and at the same time, to drain some high-temperature hydraulic oil can also serve to help reduce the system oil temperature. The normally open one-way valve 110 is opened when the system returns oil to help drain high-temperature hydraulic oil in the system; closing the system when the system does work, and ensuring that the pressure of the system is not reduced. The oil compensating mechanism 120 is used for compensating the leaked hydraulic oil in the plunger pump 500, so as to ensure the stability of the system.
When the number of the plunger pumps 500 is two, in a preferred embodiment of the present invention, the plunger pump 500 includes a first plunger pump 501, a second plunger pump 502, a coupling 503, and a plunger pump connection block 504; the first plunger pump 501 is connected with the second plunger pump 502 through a coupling 503, the first plunger pump 501 and the second plunger pump 502 are communicated in parallel through a plunger pump connecting block 504, and the first plunger pump 501 or the second plunger pump 502 is connected with the reversing valve 400 through a pump outlet block 800.
In this embodiment, the first plunger pump 501 and the second plunger pump 502 are connected together by a coupling 503 and driven by one motor. The first plunger pump 501 and the second plunger pump 502 can provide a sufficient amount of oil to the system while the layout of the compressor can be more flexible. The first plunger pump 501 can be directly connected with the pump outlet block 800, the oil inlet of the second plunger pump 502 and the oil inlet of the first plunger pump 501 are connected in parallel through the plunger pump connecting block 504, and likewise, the oil outlet of the second plunger pump 502 and the oil outlet of the first plunger pump 501 are also connected in parallel through the plunger pump connecting block 504, so that the improvement of the system oil supply by utilizing the two plunger pumps 500 at the same time is completed.
As shown in fig. 14, alternatively, the compressor may be simply modified into a general-purpose diaphragm-type compressor for a station, as follows: the reversing valve 400 adapter is replaced by a reversing valve 400 adapter with only two independent oil delivery channels, the reversing valve 400 adapter utilizes the two delivery channels to respectively deliver high-pressure oil to the first membrane head 201 and the second membrane head 202, the plunger pump 500 can drive the first membrane head 201 and the second membrane head 202 to alternately apply work, and the oil quantity of the plunger pump 500 and the oil quantity required by the first membrane head 201 and the second membrane head 202 can be matched.
As shown in fig. 15, when it is implemented as a residual hydrogen recovery compressor function, a larger displacement can be achieved using 1 large displacement plunger pump 500, with more plunger cylinders for the large displacement plunger pump 500.
The liquid-driven diaphragm type compressor provided by the embodiment comprises the machine head assembly; since the technical effects of the liquid-driven diaphragm compressor provided in this embodiment are the same as those of the head assembly provided in the above embodiment, the description thereof will not be repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A handpiece assembly, comprising: the device comprises a first-stage membrane head mechanism (100), a second-stage membrane head mechanism (200), a decompression cylinder (300), a reversing valve (400) and a plunger pump (500);
The plunger pump (500) is respectively connected with the decompression cylinder (300) and the secondary membrane head mechanism (200) through the reversing valve (400), the decompression cylinder (300) is connected with the primary membrane head mechanism (100), the reversing valve (400) is used for alternately leading high-pressure oil output by the plunger pump (500) to the decompression cylinder (300) and the secondary membrane head mechanism (200) for acting, and the decompression cylinder (300) is used for compressing gas of the primary membrane head mechanism (100);
the primary membrane head mechanism (100) is connected with the secondary membrane head mechanism (200), and compressed gas output by the primary membrane head mechanism (100) can be conveyed to the secondary membrane head mechanism (200).
2. The handpiece assembly of claim 1 further comprising a first oil path and a second oil path;
the reversing valve (400) is communicated with the pressure reducing cylinder (300) through the first oil way, and the reversing valve (400) is used for conveying high-pressure oil output by the plunger pump (500) to the pressure reducing cylinder (300) through the first oil way;
the secondary membrane head mechanism (200) comprises a first membrane head (201) and a second membrane head (202); the reversing valve (400) is respectively communicated with the first membrane head (201) and the second membrane head (202) through the second oil way, the reversing valve (400) is used for conveying high-pressure oil output by the plunger pump (500) to the first membrane head (201) and the second membrane head (202) through the second oil way, and the reversing valve (400) is used for alternately taking in oil and discharging oil from the first oil way and the second oil way.
3. The handpiece assembly of claim 2, further comprising a first reversing valve adapter block (600);
the first reversing valve switching block (600) comprises a first oil passing channel (601), a first conveying channel (602), a second oil passing channel (603) and a third oil passing channel (604); two ends of the first oil passing channel (601) are respectively communicated with one working port of the reversing valve (400) and the first membrane head (201), one end of the second oil passing channel (603) is communicated with the first oil passing channel (601) through the first conveying channel (602), and the other end of the second oil passing channel (603) is communicated with the second membrane head (202);
both ends of the third oil passing channel (604) are respectively communicated with the other working port of the reversing valve (400) and the decompression cylinder (300).
4. The handpiece assembly of claim 2, further comprising an electromagnetic directional valve (130);
the electromagnetic reversing valve (130) is a two-position five-way electromagnetic valve, the two-position five-way electromagnetic valve is respectively communicated with two working ports of the reversing valve (400), the decompression cylinder (300), the first membrane head (201) and the second membrane head (202), and the two-position five-way electromagnetic valve is used for adjusting the primary membrane head mechanism (100) and the secondary membrane head mechanism (200) to form secondary compression, or the two-position five-way electromagnetic valve is used for adjusting the secondary membrane head mechanism (200) to form primary compression.
5. The handpiece assembly of claim 1 further comprising a first oil path and a second oil path;
the secondary membrane head mechanism (200) comprises a first membrane head (201) and a second membrane head (202); the reversing valve (400) is sequentially communicated with the pressure reducing cylinder (300) and the first membrane head (201) through the first oil way, the reversing valve (400) is communicated with the second membrane head (202) through the second oil way, the reversing valve (400) is used for sequentially conveying high-pressure oil output by the plunger pump (500) to the pressure reducing cylinder (300) and the first membrane head (201) through the first oil way, the reversing valve (400) is used for conveying the high-pressure oil output by the plunger pump (500) to the second membrane head (202) through the second oil way, and the reversing valve (400) is used for alternately feeding and discharging oil from the first oil way and the second oil way.
6. The head assembly of claim 5, wherein the reversing valve (400) comprises a valve body (401), a valve sleeve (402), a valve core (403), and an end cap (404);
the valve sleeve (402) is sleeved outside the valve core (403), the end cover (404) is positioned at the end part of the valve body (401), the end cover (404) is in sealing connection with the valve body (401) so as to enable the interior of the valve body (401) to form a sealing space, and the valve sleeve (402) is positioned in the sealing space of the valve body (401);
A first oil inlet (411), a first oil return port (421), a first working port (431), a second working port (441) and a third working port (451) are sequentially formed in the valve body (401), and a first annular groove is formed along the inner wall of the sealed space, corresponding to the first oil inlet (411), the first oil return port (421), the first working port (431), the second working port (441) and the third working port (451);
the valve sleeve (402) is provided with a second oil inlet (412) and a second oil return port (422) corresponding to a first oil inlet (411) and a first oil return port (421), the second oil inlet (412) is uniformly provided with a plurality of second oil inlets (412) along the circumferential direction of the valve sleeve (402), the second oil inlets (412) are communicated with a first annular groove corresponding to the first oil inlet (411), any two second oil inlets (412) which are opposite to each other are symmetrically arranged, the second oil return port (422) is uniformly provided with a plurality of second oil return ports (422) along the circumferential direction of the valve sleeve (402), the second oil return ports (422) are communicated with the first annular groove corresponding to the first oil return port (421), and the any two second oil return ports (422) which are opposite to each other are symmetrically arranged;
The valve sleeve (402) is provided with a fourth working port (432), a fifth working port (442) and a sixth working port (452) corresponding to the first working port (431), the second working port (441) and the third working port (451), the fifth working port (442) comprises a first branch port (4421) and a second branch port (4422), a first valve core flow passage (413) and a second valve core flow passage (423) are axially arranged along the valve core (403), the fourth working port (432), the second oil inlet (412) and the first branch port (4421) can be communicated through the first valve core flow passage (413), the sixth working port (452), the second oil return port (422) and the second branch port (4422) can be communicated through the second valve core flow passage (423), the cross-sectional areas of the first branch port (4421) and the second branch port (4422) are different, the cross-sectional areas of the fourth working port (432) and the first branch port (4421) are arranged corresponding to the cross-sectional areas of the second branch port (4422), and the oil quantity of the second working valve (44400) is distributed;
The first valve core flow channel (413) and the second valve core flow channel (423) are arranged in a staggered mode along the circumferential direction of the valve core (403), the first valve core flow channel (413) and the second valve core flow channel (423) are both arranged in two, the two first valve core flow channels (413) are symmetrically arranged relative to the axis of the valve core (403), the two second valve core flow channels (423) are symmetrically arranged relative to the axis of the valve core (403), and the valve core (403) is rotationally connected with the valve sleeve (402), so that the reversing valve (400) alternately discharges oil and discharges oil.
7. The handpiece assembly of claim 6, further comprising a second reversing valve adapter block (700);
the second reversing valve switching block (700) comprises a fourth oil passing channel (701), a second conveying channel (702), a fifth oil passing channel (703), a sixth oil passing channel (704) and a seventh oil passing channel (705); the fourth oil passing channel (701) is respectively communicated with the first working port (431) and the second membrane head (202), one end of the fifth oil passing channel (703) is communicated with the fourth oil passing channel (701) through a second conveying channel (702), and the other end of the fifth oil passing channel (703) is communicated with the third working port (451);
One end of the sixth oil passing channel (704) and one end of the seventh oil passing channel (705) are both communicated with the second working port (441), the other end of the sixth oil passing channel (704) is communicated with the pressure reducing cylinder (300), and the other end of the seventh oil passing channel (705) is communicated with the first membrane head (201).
8. The head assembly of any of claims 1-7, further comprising a pump outlet block (800), an overflow valve (900), and an oil refill mechanism (120);
the plunger pump (500) is connected with the reversing valve (400) through the pump outlet block (800), the overflow valve (900) and the oil supplementing mechanism (120) are both installed on the pump outlet block (800), the overflow valve (900) can be opened when the primary membrane head mechanism (100) or the secondary membrane head mechanism (200) is exhausted, so that redundant hydraulic oil can be discharged to an oil tank, and the oil supplementing mechanism (120) is used for supplementing the plunger pump (500) with oil.
9. The handpiece assembly of claim 8, wherein the plunger pump (500) comprises a first plunger pump (501), a second plunger pump (502), a coupling (503), and a plunger pump connection block (504);
The first plunger pump (501) is connected with the second plunger pump (502) through the coupling (503), the first plunger pump (501) and the second plunger pump (502) are communicated in parallel through the plunger pump connecting block (504), and the first plunger pump (501) or the second plunger pump (502) is connected with the reversing valve (400) through the pump outlet block (800).
10. A liquid-driven diaphragm compressor comprising a head assembly as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410001573.XA CN117489574A (en) | 2024-01-02 | 2024-01-02 | Head assembly and liquid drive diaphragm type compressor |
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| CN202410001573.XA CN117489574A (en) | 2024-01-02 | 2024-01-02 | Head assembly and liquid drive diaphragm type compressor |
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