CN111120294A - Reciprocating pump valve cover and matched valve box thereof - Google Patents
Reciprocating pump valve cover and matched valve box thereof Download PDFInfo
- Publication number
- CN111120294A CN111120294A CN202010012389.7A CN202010012389A CN111120294A CN 111120294 A CN111120294 A CN 111120294A CN 202010012389 A CN202010012389 A CN 202010012389A CN 111120294 A CN111120294 A CN 111120294A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve box
- valve cover
- cover
- box
- 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.)
- Pending
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
- F04B53/10—Valves; Arrangement of valves
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a reciprocating pump valve cover and a valve box matched with the same, belongs to the technical field of petroleum engineering equipment, and aims to solve the problems that the valve cover of the existing equipment is unreliable in fixation and the service life of the valve box is short. It includes valve box and valve gap, be provided with the valve box inner chamber in the valve box, valve box inner chamber top is provided with the valve box taper hole, a plurality of valve box screws have been seted up to the valve box upper surface, the valve gap includes valve gap cone and valve gap boss, the valve gap seal groove has been seted up on the valve gap cone, install the sealing washer in the valve gap seal groove, valve gap cone bottom surface is provided with the valve gap chamfer, be equipped with a plurality of valve gap through-holes on the valve gap boss, the valve gap through-hole distributes along valve gap boss circumference, be provided with stud, stud's one end and valve box screw threaded connection, stud's other pot head is located in the valve gap through-hole, it still overlaps and is. The invention is suitable for the valve cover of the reciprocating pump and the matched valve box thereof.
Description
Technical Field
The invention belongs to the technical field of petroleum engineering equipment, and particularly relates to a reciprocating pump valve cover and a matched valve box thereof.
Background
The most used reciprocating pumps in the field of petroleum engineering equipment mainly comprise a slurry pump (also called a drilling pump) and a plunger pump (also called a fracturing pump), and the two reciprocating pumps have a common characteristic:
1. the high-pressure slurry is injected underground by utilizing the valve box, main wearing parts in the valve box are a valve body and a valve seat, in order to replace the valve body and the valve seat, the valve box is required to be provided with a movable door, when the valve body and the valve seat are required to be replaced, the door is opened, and the door is closed when the valve box works, and the door is a valve cover. Therefore, the first function of the valve cover is to control the valve box to be opened and closed, and the requirement that wearing parts such as the valve body, the valve seat and the like are convenient to replace is met.
2. Because the pressure of the slurry in the valve box is very high, the high-pressure slurry cannot be sealed by the door, the sealing ring is required to be used for sealing, and the sealing ring is pressed by the valve cover. The second function of the valve cover is to compress the seal ring to ensure that high pressure mud does not leak.
3. Since the valve closure operates under alternating loads, very high pressures must be withstood when the pressure is high. If the valve cover is not prestressed enough, the valve cover is easy to loosen, the slight consequence after the valve cover is loosened is that the sealing ring is not pressed tightly, slurry can leak, the serious consequence can damage the threads of the hydraulic cylinder and even generate the phenomenon of 'sticking the cylinder', and the hydraulic cylinder is damaged.
The current requirements for valve covers are:
1. according to the foregoing, the valve cap is screwed by using a large thread of a valve cap, and the torque applied to the valve cap is 5000-. Many sites do not have this kind of large-scale torque wrench of configuration, often not compact the valve gap with ordinary sledgehammer impact, cause the valve gap to use not hard up phenomenon under the high pressure, therefore how to compress tightly not hard up just becomes a problem that needs to solve urgently.
2. Because the valve gap is often dismantled, require to dismantle convenient and fast more.
Meanwhile, because the pumping pressure of the plunger pump is very high during operation, and the valve box is a wearing part, the mud pressure of the mud pump is higher and higher at present, and the service life of the valve box is very short when the valve box of the mud pump operates under high pressure (the rated high pressure of the mud pump is 51.7 MPa). According to the calculation of experts, the service lives of valve boxes of high-pressure slurry pumps made of the same material under different pressures are greatly different, and the valve boxes made of the same material have infinite service lives and basically have no risk of fatigue damage when working at low pressure; during high-pressure operation, the fatigue life is reduced very quickly, and the fatigue life is only over 100 hours, and some even only dozens of hours. In order to improve the efficiency of the reciprocating pump, reduce the use cost and maintenance cost of the reciprocating pump, and improve the fatigue life of the valve box, it is urgent. With the increase of the pressure of the reciprocating pump, the service life of the valve box is always one of the key points of research of technicians. The main aspects of the previous research on improving the fatigue life of the valve box are as follows:
1. the material performance and the heat treatment quality of the valve box are improved, and the mechanical properties of the material, such as yield strength, tensile strength, elongation, reduction of area, impact toughness value and the like, are improved. The cost of the measures, especially the cost of improving the material performance is very high, for example, the tensile strength of the material is improved by 20 percent after the calculation of experts, and after the cost is greatly improved, the fatigue life of the slurry pump valve box which meets the requirement of high pump pressure work can be only improved by 40 percent.
2. And in the other direction, the inner cavity of the valve box is subjected to strengthening treatment, such as shot blasting, rolling treatment and other technological measures, so that the surface strength is improved, and the fatigue life of the valve box is prolonged.
Therefore, how to overcome the problems of unreliable valve cover fixation and short service life of a valve box of the existing equipment has important research significance.
Disclosure of Invention
The invention aims to: the reciprocating pump valve cover and the matched valve box thereof are provided, and the problems that the valve cover of the existing equipment is unreliable in fixation and the service life of the valve box is short are solved.
The technical scheme adopted by the invention is as follows:
a reciprocating pump valve cover and a valve box matched with the same comprise a valve box and a valve cover, wherein the valve box comprises a valve box body, a valve box inner cavity is arranged in the valve box body, a valve box conical hole is arranged above the valve box inner cavity in the valve box body, a plurality of valve box screw holes are formed in the upper surface of the valve box body and positioned at the outer edge of the valve box conical hole, the valve box screw holes are distributed along the circumferential direction of the valve box conical hole, the valve cover comprises a valve cover cone and a valve cover boss connected above the valve cover cone, a valve cover sealing groove is formed in the valve cover cone along the circumferential direction of the valve cover cone, a valve cover chamfer is arranged on the bottom surface of the valve cover cone along the circumferential direction of the valve cover cone, a plurality of valve cover through holes are formed in the valve cover boss along the circumferential direction, a sealing ring is arranged in the valve cover sealing groove and provided with a stud, one end, the nut is further sleeved above the valve cover through hole on the double-end stud, and the double-end stud is in threaded connection with the nut.
Furthermore, a washer is sleeved on the double-end stud below the nut.
Furthermore, the upper surface of the valve cover boss is also connected with an eyebolt.
Further, the chamfer radius of the valve cover chamfer is not less than 10 mm.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the traditional valve cover screwed by one large thread of the valve cover is changed into a plurality of small thread screwed valve covers, the torque value of one original thread is reduced by many times, a common, light and small automatic (pneumatic or electric) torque wrench tool can be adopted for screwing, and the current situation that the valve cover cannot be tightly pressed or the valve cover can be tightly pressed only by a professional large and heavy torque wrench is solved.
Simultaneously, can come the adjustment to install the number that compresses tightly the nut of valve gap according to the pumping pressure height of mud pump work, only need during the low pressure even with 4 nuts alright with satisfying the requirement, consequently very convenient and fast.
Meanwhile, the valve cover cone and the conical hole of the matched valve box are in interference fit by the conical surfaces, so that the surface of the inner cavity of the valve box, which is in contact with high-pressure slurry, is subjected to very uniform pre-pressing force, and the pre-pressing force can offset the slurry stress applied to the slurry pump during working, thereby reducing the working stress of the inner cavity of the valve box of the slurry pump. Because the working stress of the valve box is reduced, the fatigue life of the valve box can be greatly prolonged.
Meanwhile, by adopting the structure, the valve cover is very light, and the valve cover can be easily disassembled by utilizing the lifting bolt on the valve cover.
Meanwhile, by adopting the structure, the valve cover is matched with the valve box by a long conical surface, and the positioning is very accurate during installation.
Meanwhile, by adopting the structure, the valve box does not need to be processed with a large-diameter thread matched with the valve cover, the valve cover can be processed by using a common screw tap, and the valve cover is only processed with a through hole matched with the stud. The work is done with standard double-ended bolts and nuts, and therefore the manufacturing cost is very low.
This patent adopts the connection structure's of valve gap and valve box improvement, can reduce the stress of valve box inner chamber, calculates according to fatigue strength, and the valve box inner chamber reduces operating stress about 30%, and the fatigue strength of valve box can improve more than 10 times, is higher than greatly and improves the function of the fatigue life of valve box only by the mechanical properties who improves the material.
Drawings
FIG. 1 is a schematic assembled sectional view of a valve cover of a reciprocating pump and a valve box matched with the valve cover of the reciprocating pump according to the present invention;
FIG. 2 is a cross-sectional schematic view of a patented valve cover of the invention;
FIG. 3 is a schematic top view of the patented valve cover of the present invention;
FIG. 4 is a schematic cross-sectional view of a patent valve manifold of the present invention;
FIG. 5 is a schematic top view of the patented valve box of the present invention;
FIG. 6 is a schematic view of a valve cover and a valve box of a conventional mud pump in the prior art;
FIG. 7 is a schematic view of a valve cover of a typical prior art mud pump;
FIG. 8 is a schematic view of a prior art conventional mud pump valve box;
FIG. 9 is a schematic view of the valve cover and valve box of a typical prior art plunger pump;
FIG. 10 is a schematic view of a prior art plunger pump valve cover assembly;
FIG. 11 is a schematic view of a prior art plunger pump valve housing;
the labels in the figure are: 1-valve box, 2-valve cover, 3-sealing ring, 4-double-end stud, 5-gasket, 6-nut, 7-flying ring stud, 1 a-valve cover sealing groove, 1 b-valve cover cone, 1 c-valve cover boss, 1 d-valve cover through hole, 1 e-valve cover chamfer, 2 a-valve box body, 2 b-valve box taper hole, 2 c-valve box screw hole, 2 d-valve box inner cavity, 3 a-common slurry pump valve box in the prior art, 3 b-common slurry pump valve cover in the prior art, 3 c-common slurry pump sealing ring in the prior art, 4 a-common slurry pump valve cover in the prior art, 4 b-common slurry pump valve cover step end face in the prior art, 4 c-large thread of common slurry pump valve cover in the prior art, 5-gasket, 6-nut, 7-flying ring stud, 4 d-round hole of valve cover of common slurry pump in prior art, 5 a-cylindrical surface of valve box of common slurry pump in prior art, 5 b-installing sealing ring surface of valve box of common slurry pump in prior art, 5 c-bearing surface of valve box of common slurry pump in prior art, 5 d-threaded surface of valve box of common slurry pump in prior art, 6 a-valve box of plunger pump in common plunger pump in prior art, 6 b-valve cover assembly of plunger pump in common plunger pump in prior art, 6 c-sealing ring of plunger pump in common plunger pump in prior art, 7 a-cylindrical surface of valve cover assembly of plunger pump in common plunger pump in prior art, 7 b-installing sealing groove surface of valve cover assembly of plunger pump in common plunger pump in prior art, 7 c-stepped end surface of valve cover assembly of plunger pump in common plunger pump in prior art, 7 d-large threaded surface of valve cover assembly of plunger pump in common plunger pump in prior art, 7 e-hexagonal, 8 a-cylindrical surface of a valve box of the plunger pump commonly used in the prior art, 8 b-pressure bearing surface of the valve box of the plunger pump commonly used in the prior art, and 8 c-threaded surface of the valve box of the plunger pump commonly used in the prior art.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A reciprocating pump valve cover and a valve box matched with the same comprise a valve box and a valve cover, wherein the valve box comprises a valve box body, a valve box inner cavity is arranged in the valve box body, a valve box conical hole is arranged above the valve box inner cavity in the valve box body, a plurality of valve box screw holes are formed in the upper surface of the valve box body and positioned at the outer edge of the valve box conical hole, the valve box screw holes are distributed along the circumferential direction of the valve box conical hole, the valve cover comprises a valve cover cone and a valve cover boss connected above the valve cover cone, a valve cover sealing groove is formed in the valve cover cone along the circumferential direction of the valve cover cone, a valve cover chamfer is arranged on the bottom surface of the valve cover cone along the circumferential direction of the valve cover cone, a plurality of valve cover through holes are formed in the valve cover boss along the circumferential direction, a sealing ring is arranged in the valve cover sealing groove and provided with a stud, one end, the nut is further sleeved above the valve cover through hole on the double-end stud, and the double-end stud is in threaded connection with the nut.
Furthermore, a washer is sleeved on the double-end stud below the nut.
Furthermore, the upper surface of the valve cover boss is also connected with an eyebolt.
Further, the chamfer radius of the valve cover chamfer is not less than 10 mm.
In the implementation process, the double-ended stud is firstly installed in the screw hole of the valve box, the sealing ring is installed in the sealing groove of the valve cover, the cone of the valve cover is placed in the cone hole of the valve box, the surface of the cone of the valve cover is contacted with the surface of the cone hole of the valve box, the through hole of the valve cover is inserted into the double-ended stud, the washer is inserted into the double-ended stud, and the nut is screwed tightly. After the valve cover is screwed, the surface of the cone of the valve cover is in interference contact with the surface of the taper hole of the valve box, so that the surface of the inner cavity of the valve box, which is in contact with high-pressure slurry, generates pre-applied compressive stress, the pressure of the slurry borne by the valve box during working can be offset, the working stress of the inner cavity of the valve box is reduced, and in addition, the valve cover is provided with a large R valve cover chamfer, the working stress under the working condition of high pressure in the valve box can be effectively reduced, the fatigue life of the valve box is greatly prolonged, and the use cost and the maintenance cost.
The quantity of the valve gap through-hole and the valve box screw that this embodiment designed can be according to valve box operating pressure how much to decide, and operating pressure is low, and the design quantity is few, and operating pressure is high the design quantity is many, from valve box and valve gap structure angle, the design quantity can 18 and above, can adopt ordinary small-size pneumatic or electronic torque wrench when the purpose is screwed the nut, has solved original valve gap and has pressed not tightly or must compress tightly the current situation that the valve gap can only be compressed tightly with professional large-scale heavy torque wrench.
With reference to fig. 6, 7 and 8, in the slurry pump commonly used in the prior art, firstly, a sealing ring of the slurry pump commonly used in the prior art is installed on a sealing ring surface, a large thread of a valve cover is screwed into a thread surface of a valve box, the cylindrical surface of the valve cover and the cylindrical surface of the valve box are in clearance fit and are not stressed with each other, the end surface of a step of the valve cover is contacted with a pressure bearing surface of the valve box, after the valve cover is screwed, the contact part of the end surface of the step of the valve cover and the pressure bearing surface of the valve box is in interference fit, the area is small, the stress of the valve box at the position is large, and a gap is formed on the surface of an inner cavity of the valve box, which is in diameter contact with high-pressure slurry, so that the.
Referring to fig. 7, in the slurry pump commonly used in the prior art, an extra large torque value (the torque value for screwing the valve cover when the high-pressure slurry pump works at high pressure is as high as 5000-10000N · m) is applied to the valve cover, and the application is basically very difficult by the valve cover circular hole, and the pressing force of the valve cover is often insufficient, so that the slurry pump works at high pressure, and the valve cover is loosened.
With reference to fig. 9, 10 and 11, in the plunger pump commonly used in the prior art, the sealing ring of the plunger pump commonly used in the prior art is firstly placed in the mounting sealing groove of the valve cover assembly, the cylindrical surface of the valve cover assembly of the plunger pump is arranged in the cylindrical surface of the valve box of the plunger pump commonly used in the prior art, the large threaded surface of the valve cover assembly of the plunger pump commonly used in the prior art is screwed into the threaded surface of the valve box of the plunger pump commonly used in the prior art, the step end surface is contacted with the pressure bearing surface of the valve box of the plunger pump, the cylindrical surface of the valve cover and the cylindrical surface of the valve box are in clearance fit and are not stressed with each other, after the valve cover assembly is screwed, the contact part of the step end surface of the valve cover assembly and the pressure bearing surface of the valve box is in interference fit, the area is small, the stress of the valve box at the position is large, the, the working stress of the valve box inner cavity cannot be reduced.
Referring to fig. 10, in the plunger pump commonly used in the prior art, to apply an extra large torque value to the valve cover assembly (the torque value for screwing the valve cover when the high-pressure slurry pump works at high pressure is as high as 5000-.
Example 1
A reciprocating pump valve cover and a valve cover matched with the same are disclosed, which comprises a valve box and a valve cover and is characterized in that the valve box comprises a valve box body, a valve box inner cavity is arranged in the valve box body, a valve box conical hole is arranged above the valve box inner cavity in the valve box body, a plurality of valve box screw holes are arranged on the upper surface of the valve box body and positioned at the outer edge of the valve box conical hole, the valve box screw holes are circumferentially distributed along the valve box conical hole, the valve cover comprises a valve cover cone and a valve cover boss connected above the valve cover cone, a valve cover sealing groove is arranged on the valve cover cone along the circumferential direction of the valve cover cone, a valve cover chamfer is arranged on the bottom surface of the valve cover cone along the circumferential direction of the valve cover cone, a plurality of valve cover through holes are arranged on the valve cover boss along the circumferential direction, a sealing ring is arranged in the valve cover, the other end of the stud is sleeved in the valve cover through hole, a nut is further sleeved on the stud above the valve cover through hole, and the stud is in threaded connection with the nut.
Example 2
On the basis of the embodiment 1, a washer is sleeved on the stud bolt below the nut.
Example 3
On the basis of embodiment 1, the upper surface of the valve cover boss is also connected with an eyebolt.
Example 4
On the basis of the embodiment 1, the chamfer radius of the valve cover chamfer is not less than 10 mm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A valve cover of a reciprocating pump and a valve cover (2) matched with the valve cover of the reciprocating pump comprise a valve box (1) and a valve cover (2) and are characterized in that the valve box (1) comprises a valve box body (2a), a valve box inner cavity (2d) is arranged in the valve box body (2a), a valve box conical hole (2b) is arranged above the valve box inner cavity (2d) in the valve box body (2a), the upper surface of the valve box body (2a) is positioned at the outer edge of the valve box conical hole (2b) and is provided with a plurality of valve box screw holes (2c), the valve box screw holes (2c) are circumferentially distributed along the valve box conical hole (2b), the valve cover (2) comprises a cone valve cover (1b) and a valve cover boss (1c) connected above the cone valve cover (1b), a sealing groove valve cover (1a) is circumferentially arranged on the cone valve cover (1b) along the cone valve cover (1b), and a chamfer valve cover (1e) is circumferentially arranged on the bottom surface along the cone, lie in valve gap cone (1b) outside on valve gap boss (1c) and seted up a plurality of valve gap through-holes (1d), valve gap through-hole (1d) distribute along valve gap boss (1c) circumference, install sealing washer (3) in valve gap seal groove (1a), are provided with stud (4), the one end and valve box screw (2c) threaded connection of stud (4), in valve gap through-hole (1d) was located to the other pot head of stud (4), still the cover was equipped with nut (6) above lieing in valve gap through-hole (1d) on stud (4), stud (4) and nut (6) threaded connection.
2. A reciprocating pump valve cover and its associated valve housing according to claim 1, characterized in that a washer (5) is also fitted on the stud (4) below the nut (6).
3. A reciprocating pump valve cover and its associated valve box according to claim 1, wherein the upper surface of the valve cover boss (1c) is further connected with an eye bolt (7).
4. A reciprocating pump valve cover and its associated valve housing, according to claim 1, characterized in that the chamfer radius of the valve cover chamfer (1e) is not less than 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010012389.7A CN111120294A (en) | 2020-01-07 | 2020-01-07 | Reciprocating pump valve cover and matched valve box thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010012389.7A CN111120294A (en) | 2020-01-07 | 2020-01-07 | Reciprocating pump valve cover and matched valve box thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111120294A true CN111120294A (en) | 2020-05-08 |
Family
ID=70487180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010012389.7A Pending CN111120294A (en) | 2020-01-07 | 2020-01-07 | Reciprocating pump valve cover and matched valve box thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111120294A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228337A (en) * | 2020-11-17 | 2021-01-15 | 段宏康 | Disassembly and assembly structure of reciprocating pump valve cover |
| CN113982906A (en) * | 2021-11-30 | 2022-01-28 | 黄秀芳 | Sealing structure for valve box and valve cover of drilling pump |
-
2020
- 2020-01-07 CN CN202010012389.7A patent/CN111120294A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228337A (en) * | 2020-11-17 | 2021-01-15 | 段宏康 | Disassembly and assembly structure of reciprocating pump valve cover |
| CN113982906A (en) * | 2021-11-30 | 2022-01-28 | 黄秀芳 | Sealing structure for valve box and valve cover of drilling pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11867171B2 (en) | Fluid splitter in a fluid end or plunger pump | |
| CN111120294A (en) | Reciprocating pump valve cover and matched valve box thereof | |
| CN215979846U (en) | Fluid end and plunger pump | |
| US6817278B2 (en) | Piston assembly for hydraulic cylinder | |
| CN211397864U (en) | Reciprocating pump valve cover and matched valve box thereof | |
| CN113339539A (en) | Labor-saving durable ultrahigh-pressure manual wedge-type throttle valve | |
| CN202883350U (en) | Drilling pump valve deck device | |
| CN211008538U (en) | Oil well energy storage formula well head packing box | |
| CN113323863B (en) | Fast-assembling combined piston rod of drilling pump | |
| CN112228337A (en) | Disassembly and assembly structure of reciprocating pump valve cover | |
| CN113074107A (en) | Hydraulic end of reciprocating pump | |
| CN113027349A (en) | Multifunctional polish rod converter | |
| CN214135791U (en) | Mechanical seal static ring mounting tool | |
| CN215672665U (en) | Hydraulic end of reciprocating pump | |
| CN112610693B (en) | Method for sealing ultrahigh pressure test vessel | |
| CN111230809A (en) | Valve seat assembling tool and method for flat gate valve | |
| CN212718354U (en) | Soft sealing gate valve | |
| CN215172392U (en) | Labor-saving durable ultrahigh-pressure manual wedge-type throttle valve | |
| CN220668387U (en) | High-pressure forged stop valve | |
| CN218522915U (en) | Improved hydraulic nut pressure adjusting device | |
| CN220956015U (en) | Integral fracturing pump fluid end packing box | |
| CN220581406U (en) | Frequency modulation valve of hydraulic breaking hammer | |
| CN215805473U (en) | Pressure regulating type relief valve structure of hydraulic pipe fitting machining tool | |
| CN220929654U (en) | Five jar slush pump valve gap convenient to installation | |
| CN219746951U (en) | Be applied to preloading device of rotary machine shaft coupling briquetting bolt |
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 |