CN111852841A - Automatic sealing and pressing device of hydraulic ceramic plunger pump - Google Patents
Automatic sealing and pressing device of hydraulic ceramic plunger pump Download PDFInfo
- Publication number
- CN111852841A CN111852841A CN202010717559.1A CN202010717559A CN111852841A CN 111852841 A CN111852841 A CN 111852841A CN 202010717559 A CN202010717559 A CN 202010717559A CN 111852841 A CN111852841 A CN 111852841A
- Authority
- CN
- China
- Prior art keywords
- ring
- hydraulic
- sealing
- plunger pump
- ceramic plunger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- 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
- F04B51/00—Testing machines, pumps, or pumping installations
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Abstract
The invention discloses an automatic sealing and pressing device of a hydraulic ceramic plunger pump, which comprises a fixed ring, a floating ring, a sealing element, a gasket, an overflow pressure reducing valve and a current reversing valve, wherein a plurality of sealing elements and gaskets are arranged at intervals from top to bottom and are sequentially arranged at the bottom of a sealing cavity between a pump body and a plunger of the hydraulic ceramic plunger pump, the floating ring is arranged on the sealing element positioned at the topmost part, the fixed ring is fixed at the top part of the pump body through a plurality of fastening bolts, the bottom end of the fixing ring extends into the sealing cavity and seals the top opening of the sealing cavity, a hydraulic system of the hydraulic ceramic plunger pump divides one path of branch hydraulic oil, the branch hydraulic oil enters the fixed ring through the overflow reducing valve, the current reversing valve and the oil pipe so as to be injected into the sealing cavity to press the floating ring downwards, the pressing and sealing effects are uniform, and the pressing amount can be automatically adjusted according to the abrasion condition of the sealing element.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of plunger pumps, in particular to the technical field of an automatic sealing and pressing device of a hydraulic ceramic plunger pump.
[ background of the invention ]
The plunger pump is an important device of a hydraulic system, changes the volume of a sealed working cavity to absorb or press oil by means of reciprocating motion of a plunger in a cylinder body, has the advantages of high rated pressure, compact structure, high efficiency, convenience in flow regulation and the like, and is widely applied to occasions where high pressure, large flow and flow need to be regulated, such as hydraulic machines, engineering machinery and ships.
As shown in fig. 1 to 3, all the hydraulic ceramic plunger pumps on the market at present are sealed by a plurality of rubber sealing rings b with square cross sections, the middle of each rubber sealing ring b is separated by a plastic spacer ring a, and three screws d are used for fastening a pressing ring c so as to press the sealing rings b tightly. In the use process of the sealing structure, the problems that the tightening force of three screws d is different, the pressing ring c is difficult to uniformly press the sealing ring b, the sealing ring b is abraded greatly, the service life is short, and the replacement frequency is too high exist, and the sealing structure needs to be solved urgently.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, and provides an automatic sealing and pressing device of a hydraulic ceramic plunger pump, which has uniform pressing and sealing effects and can automatically adjust the pressing amount according to the abrasion condition of a sealing element.
In order to achieve the purpose, the invention provides an automatic sealing and compressing device of a hydraulic ceramic plunger pump, which comprises a fixing ring, a floating ring, sealing elements, gaskets, an overflow pressure reducing valve and a current reversing valve, wherein the sealing elements and the gaskets are arranged at intervals from top to bottom and are sequentially arranged at the bottom of a sealing cavity between a pump body and a plunger of the hydraulic ceramic plunger pump, the floating ring is arranged on the sealing element positioned at the topmost part, the fixing ring is fixed at the top of the pump body through a plurality of fastening bolts, the bottom end of the fixing ring extends into the sealing cavity and seals an opening at the top of the sealing cavity, a hydraulic system of the hydraulic ceramic plunger pump divides a branch hydraulic oil, and the branch hydraulic oil enters the fixing ring through the overflow pressure reducing valve, the current reversing valve and an oil pipe so as to be injected into the sealing cavity and compress the floating.
Preferably, the left side of the fixing ring is provided with a quick connector, the quick connector is connected with the oil pipe, the left side of the fixing ring is internally provided with an oil passage, and two ends of the oil passage are respectively communicated with the quick connector and the sealing cavity.
Preferably, a plurality of first annular grooves are formed in the contact surface of the fixing ring and the floating ring, first O-shaped sealing rings are fixed in the first annular grooves, a plurality of second annular grooves are formed in the contact surface of the fixing ring and the pump body, second O-shaped sealing rings are fixed in the second annular grooves, a plurality of third annular grooves are formed in the contact surface of the floating ring and the pump body, and third O-shaped sealing rings are fixed in the third annular grooves.
Preferably, a water passing channel and a plurality of water separating channels are respectively arranged on the contact surface of the fixing ring and the plunger, and the water separating channels are positioned on the water passing channel and are internally and fixedly provided with water separating rings.
Preferably, the cross section of the water isolating ring is rectangular, the bottom end of the water isolating ring is provided with an annular cutting groove, and the cross section of the annular cutting groove is triangular.
Preferably, a plurality of assembly holes are formed in the floating ring.
Preferably, the sealing member is a quad ring.
Preferably, a pressure gauge is further arranged on an oil pipe between the overflow reducing valve and the current reversing valve.
The invention has the beneficial effects that: the hydraulic ceramic plunger pump has the advantages that one branch of hydraulic oil is separated from a hydraulic system of the hydraulic ceramic plunger pump, is communicated with the fixing ring through the overflow pressure reducing valve, the pressure gauge oil and the current reversing valve in sequence, and is injected into the sealing cavity, so that the floating ring is pressed downwards, the pressing and sealing effects are uniform, the pressing amount can be automatically adjusted according to the abrasion condition of the sealing element, the sealing element is always in the optimal pressing state during working, the sealing element is not stressed after being stopped and the pressure is relieved, and the service life is obviously prolonged; the water-proof ring is arranged above the water flow channel to prevent water from permeating; through set up annular grooving in the bottom of water proof circle, improve sealed effect, further increase of service life.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a front view of a prior art sealing device installed in a hydraulic ceramic plunger pump;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged schematic view at B of FIG. 2;
FIG. 4 is a schematic structural diagram of an automatic sealing and compressing device of a hydraulic ceramic plunger pump of the invention when a plunger is about to descend;
FIG. 5 is a schematic structural diagram of the automatic sealing and pressing device of the hydraulic ceramic plunger pump of the present invention when the plunger is about to rise;
FIG. 6 is an enlarged schematic view at M of FIG. 4;
FIG. 7 is an enlarged schematic view at N of FIG. 4;
fig. 8 is a sectional view of a water-proof ring of a sealing automatic pressing device of a hydraulic ceramic plunger pump according to the present invention.
In the figure: the hydraulic pump comprises a pump body 1, a plunger 2, a plunger 3, a fixing ring 31, a quick joint 32, an oil passing channel 33, a first annular groove 34, a second annular groove 34, a water passing channel 35, a water isolating groove 36, a water isolating ring 37, an annular cutting groove 371, a floating ring 4, a third annular groove 41, a mounting hole 42, a sealing element 5, a gasket 6, an overflow pressure reducing valve 7, a pressure gauge 8, a current reversing valve 9, a plastic spacer ring a, a sealing ring b, a compression ring c and a screw d.
[ detailed description ] embodiments
Referring to fig. 4 to 8, the automatic sealing and compressing device for the hydraulic ceramic plunger pump of the present invention comprises a fixed ring 3, a floating ring 4, a sealing element 5, a gasket 6, an overflow pressure reducing valve 7 and a current reversing valve 9, wherein a plurality of the sealing elements 5 and the gaskets 6 are arranged at intervals from top to bottom and are sequentially arranged at the bottom of a sealing cavity between a pump body 1 and a plunger 2 of the hydraulic ceramic plunger pump, the floating ring 4 is placed on the sealing member 5 positioned at the topmost part, the fixed ring 3 is fixed at the top of the pump body 1 through a plurality of fastening bolts, the bottom end of the fixing ring 3 extends into the sealing cavity and seals the top opening of the sealing cavity, a hydraulic system of the hydraulic ceramic plunger pump divides one path of branch hydraulic oil, the branch hydraulic oil enters the fixed ring 3 through the overflow reducing valve 7, the current reversing valve 9 and the oil pipe, and is injected into the sealing cavity to press the floating ring 4 downwards.
The left side of the fixing ring 3 is provided with a quick coupling 31, the quick coupling 31 is connected with an oil pipe, the left side of the fixing ring 3 is internally provided with an oil passage 32, and two ends of the oil passage 32 are respectively communicated with the quick coupling 31 and the sealing cavity.
The utility model discloses a pump, including solid fixed ring 3, pump body 1, fixed ring 3 and floating ring 4, be equipped with the first ring channel 33 of a plurality of on the contact surface of solid fixed ring 3 and floating ring 4, first ring channel 33 internal fixation has first O type sealing washer, gu be equipped with a plurality of second ring channel 34 on the contact surface of solid fixed ring 3 and pump body 1, second ring channel 34 internal fixation has second O type sealing washer, be equipped with a plurality of third ring channel 41 on the contact surface of floating ring 4 and pump body 1, third ring channel 41 internal fixation has third O type sealing washer.
The contact surface of the fixing ring 3 and the plunger 2 is respectively provided with a water flowing channel 35 and a plurality of water isolating grooves 36, and the water isolating grooves 36 are positioned on the water flowing channel 35 and are internally fixed with water isolating rings 37.
The cross section of the water isolating ring 37 is rectangular, the bottom end of the cross section of the water isolating ring is provided with an annular cutting groove 371, and the cross section of the annular cutting groove 51 is triangular.
A plurality of assembling holes 42 are arranged on the floating ring 4.
The sealing element 5 is a square sealing ring.
And a pressure gauge 8 is also arranged on an oil pipe between the overflow reducing valve 7 and the current reversing valve 9.
The working process of the invention is as follows:
referring to fig. 4, in the process that the plunger 2 is pressed downwards, one branch of hydraulic oil branched from a hydraulic system of the hydraulic ceramic plunger pump sequentially passes through the overflow pressure reducing valve 7, the pressure gauge 8 and the current reversing valve 9 along an oil pipe, enters the oil passage 32 from the quick connector 31, and is injected into a sealing cavity between the pump body 1 and the plunger 2, so that the floating ring 4 is pressed downwards to realize sealing.
Referring to fig. 5, in the process that the plunger 2 is loosened upwards, the branched hydraulic oil in the sealing cavity flows out from the fixing ring 3, passes through the current reversing valve 9, the pressure gauge 8 and the overflow reducing valve 7 along the oil pipe in sequence, and flows back to the oil tank of the hydraulic ceramic plunger pump.
The hydraulic ceramic plunger pump has the advantages that one branch of hydraulic oil is separated from a hydraulic system of the hydraulic ceramic plunger pump, is communicated with the fixing ring through the overflow pressure reducing valve, the pressure gauge oil and the current reversing valve in sequence, and is injected into the sealing cavity, so that the floating ring is pressed downwards, the pressing and sealing effects are uniform, the pressing amount can be automatically adjusted according to the abrasion condition of the sealing element, the sealing element is always in the optimal pressing state during working, the sealing element is not stressed after being stopped and the pressure is relieved, and the service life is obviously prolonged; the water-proof ring is arranged above the water flow channel to prevent water from permeating; through set up annular grooving in the bottom of water proof circle, improve sealed effect, further increase of service life.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides a sealed automatic pressing device of hydraulic pressure ceramic plunger pump which characterized in that: comprises a fixed ring (3), a floating ring (4), a sealing element (5), a gasket (6), an overflow pressure reducing valve (7) and a current reversing valve (9), wherein the sealing element (5) and the gasket (6) are arranged at intervals from top to bottom and are sequentially arranged at the bottom of a sealing cavity between a pump body (1) and a plunger (2) of a hydraulic ceramic plunger pump, the floating ring (4) is placed above the topmost seal (5), the fixed ring (3) is fixed on the top of the pump body (1) through a plurality of fastening bolts, the bottom end of the fixing ring (3) extends into the sealing cavity and seals the top opening of the sealing cavity, a hydraulic system of the hydraulic ceramic plunger pump divides one branch of hydraulic oil, the branch hydraulic oil enters the fixed ring (3) through the overflow reducing valve (7), the current reversing valve (9) and the oil pipe, and is injected into the sealing cavity to press the floating ring (4) downwards.
2. The automatic seal pressing device of a hydraulic ceramic plunger pump as claimed in claim 1, wherein: the left side of solid fixed ring (3) is equipped with quick-operation joint (31), quick-operation joint (31) are connected with oil pipe, the inside oily passageway (32) of mistake that still is equipped with in left side of solid fixed ring (3), the both ends of crossing oily passageway (32) are linked together with quick-operation joint (31) and seal chamber respectively.
3. The automatic seal pressing device of a hydraulic ceramic plunger pump as claimed in claim 1, wherein: the utility model discloses a pump, including solid fixed ring (3), fixed ring (3) and floating ring (4), be equipped with the first ring channel of a plurality of (33) on the contact surface of fixed ring (3) and floating ring (4), first ring channel (33) internal fixation has first O type sealing washer, be equipped with a plurality of second ring channel (34) on the contact surface of solid fixed ring (3) and the pump body (1), second ring channel (34) internal fixation has second O type sealing washer, be equipped with a plurality of third ring channel (41) on the contact surface of floating ring (4) and the pump body (1), third ring channel (41) internal fixation has third O type sealing washer.
4. The automatic seal pressing device of a hydraulic ceramic plunger pump as claimed in claim 1, wherein: the water flow passage (35) and the water separating grooves (36) are respectively arranged on the contact surfaces of the fixing ring (3) and the plunger (2), and the water separating grooves (36) are positioned on the water flow passage (35) and are internally and fixedly provided with water separating rings (37).
5. The automatic seal pressing device of a hydraulic ceramic plunger pump as claimed in claim 4, wherein: the cross section of the water isolating ring (37) is rectangular, the bottom end of the cross section of the water isolating ring is provided with an annular cutting groove (371), and the cross section of the annular cutting groove (51) is triangular.
6. The automatic seal pressing device of a hydraulic ceramic plunger pump as claimed in claim 1, wherein: the floating ring (4) is provided with a plurality of assembling holes (42).
7. The automatic seal pressing device of a hydraulic ceramic plunger pump as claimed in claim 1, wherein: the sealing element (5) is a square sealing ring.
8. The automatic seal pressing device of a hydraulic ceramic plunger pump as claimed in claim 1, wherein: and a pressure gauge (8) is also arranged on an oil pipe between the overflow reducing valve (7) and the current reversing valve (9).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010717559.1A CN111852841B (en) | 2020-07-23 | 2020-07-23 | Automatic sealing and pressing device of hydraulic ceramic plunger pump |
| PCT/CN2020/108195 WO2022016628A1 (en) | 2020-07-23 | 2020-08-10 | Automatic seal pressing apparatus for hydraulic ceramic plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010717559.1A CN111852841B (en) | 2020-07-23 | 2020-07-23 | Automatic sealing and pressing device of hydraulic ceramic plunger pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111852841A true CN111852841A (en) | 2020-10-30 |
| CN111852841B CN111852841B (en) | 2022-07-01 |
Family
ID=72949723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010717559.1A Active CN111852841B (en) | 2020-07-23 | 2020-07-23 | Automatic sealing and pressing device of hydraulic ceramic plunger pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111852841B (en) |
| WO (1) | WO2022016628A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022016628A1 (en) * | 2020-07-23 | 2022-01-27 | 浙江森友环保成套设备有限公司 | Automatic seal pressing apparatus for hydraulic ceramic plunger pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008051160A (en) * | 2006-08-23 | 2008-03-06 | Aisin Sangyo Kk | Shaft sealing structure of rotating shaft |
| CN202158190U (en) * | 2011-06-22 | 2012-03-07 | 武汉汉星环保工程技术有限公司 | Gland type filling dynamic sealing device |
| CN203322276U (en) * | 2013-06-14 | 2013-12-04 | 张家港市中化机械密封件厂 | Mechanical seal structure for kettle |
| CN206398088U (en) * | 2017-01-19 | 2017-08-11 | 洛阳凯正环保工艺设备有限公司 | A kind of mixed dissolution machine sealing structure |
| CN110005810A (en) * | 2019-03-20 | 2019-07-12 | 西安交通大学 | A kind of High-temp. kiln dynamic seal structure |
| CN111219322A (en) * | 2020-03-26 | 2020-06-02 | 浙江森友环保成套设备有限公司 | Sealing device of hydraulic ceramic plunger pump |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005045937B4 (en) * | 2005-09-26 | 2014-10-30 | Robert Bosch Gmbh | Piston pump for a slip control vehicle brake system |
| DE102013225480A1 (en) * | 2013-12-10 | 2015-06-11 | Robert Bosch Gmbh | Piston pump for a hydraulic vehicle brake system |
| CN104564646A (en) * | 2014-12-18 | 2015-04-29 | 南京松本水处理技术有限公司 | Sealing device for plunger pump and plunger pump |
| DE102016216350A1 (en) * | 2016-08-30 | 2018-03-01 | Robert Bosch Gmbh | Piston engine, in particular piston pump for conveying pressure medium in an electronically slip-controllable vehicle brake system and electronically slip-controllable vehicle brake system |
| WO2020003206A1 (en) * | 2018-06-27 | 2020-01-02 | Impact Solutions As | Fracturing pump systems having a hydraulically-driven assembly applying variable amounts of pressure on packing |
| CN208605344U (en) * | 2018-08-15 | 2019-03-15 | 浙江荣鹏气动工具有限公司 | A kind of sealing structure of plunger pump |
| CN210599373U (en) * | 2019-05-10 | 2020-05-22 | 浙江博来工具有限公司 | Static sealing structure of plunger pump |
| CN111852841B (en) * | 2020-07-23 | 2022-07-01 | 浙江森友环保成套设备有限公司 | Automatic sealing and pressing device of hydraulic ceramic plunger pump |
-
2020
- 2020-07-23 CN CN202010717559.1A patent/CN111852841B/en active Active
- 2020-08-10 WO PCT/CN2020/108195 patent/WO2022016628A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008051160A (en) * | 2006-08-23 | 2008-03-06 | Aisin Sangyo Kk | Shaft sealing structure of rotating shaft |
| CN202158190U (en) * | 2011-06-22 | 2012-03-07 | 武汉汉星环保工程技术有限公司 | Gland type filling dynamic sealing device |
| CN203322276U (en) * | 2013-06-14 | 2013-12-04 | 张家港市中化机械密封件厂 | Mechanical seal structure for kettle |
| CN206398088U (en) * | 2017-01-19 | 2017-08-11 | 洛阳凯正环保工艺设备有限公司 | A kind of mixed dissolution machine sealing structure |
| CN110005810A (en) * | 2019-03-20 | 2019-07-12 | 西安交通大学 | A kind of High-temp. kiln dynamic seal structure |
| CN111219322A (en) * | 2020-03-26 | 2020-06-02 | 浙江森友环保成套设备有限公司 | Sealing device of hydraulic ceramic plunger pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022016628A1 (en) * | 2020-07-23 | 2022-01-27 | 浙江森友环保成套设备有限公司 | Automatic seal pressing apparatus for hydraulic ceramic plunger pump |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022016628A1 (en) | 2022-01-27 |
| CN111852841B (en) | 2022-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11867171B2 (en) | Fluid splitter in a fluid end or plunger pump | |
| CN111692064A (en) | Long-life plunger pump hydraulic end | |
| CN101482179A (en) | Multi-n shaped sealing device | |
| CN111852841B (en) | Automatic sealing and pressing device of hydraulic ceramic plunger pump | |
| CN201412318Y (en) | Plunger pump packing box leak-free return flow type sealing device | |
| CN2851633Y (en) | Reciprocating plunger-pump | |
| CN101435509A (en) | n type seal device | |
| CN214499391U (en) | Hydraulic end assembly for reciprocating plunger pump | |
| CN215173231U (en) | Special-shaped taper sealing mechanism in pipeline | |
| CN106287046B (en) | A kind of highly pressurised liquid two way seal pipe joint | |
| CN212054591U (en) | Underground flexible continuous composite pipe connecting joint with cable preset on inner wall | |
| CN104389778A (en) | High-performance packing sealing device and application method | |
| CN220036899U (en) | Split mounting and fixing structure of oil distribution disc and lower membrane head | |
| CN111101885A (en) | Underground flexible continuous composite pipe connecting joint with cable preset on inner wall and method | |
| CN111219322A (en) | Sealing device of hydraulic ceramic plunger pump | |
| CN207291049U (en) | A kind of filter plate frame of high-pressure compressing machine | |
| CN220487840U (en) | Hexamethylenediamine reactor feeding plunger pump | |
| CN214697780U (en) | Self-adjusting pump rod blowout prevention box for coal bed gas | |
| CN111502980A (en) | Plunger cylinder structure for diaphragm pump | |
| CN217583327U (en) | Sealing structure for joint surface of valve body and pump body | |
| CN214661145U (en) | Automatic reversing mechanism of double-acting ultrahigh-pressure supercharger for water jet cutting equipment | |
| CN220017041U (en) | Isolator structure | |
| CN113280137B (en) | Diaphragm type mud valve | |
| CN216241572U (en) | Integrated block for hydraulic pump station | |
| CN216691670U (en) | Small-size withstand voltage hydro-cylinder structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |