CN113819291B - Reciprocating pump knocking-free valve cover device - Google Patents
Reciprocating pump knocking-free valve cover device Download PDFInfo
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- CN113819291B CN113819291B CN202111409476.7A CN202111409476A CN113819291B CN 113819291 B CN113819291 B CN 113819291B CN 202111409476 A CN202111409476 A CN 202111409476A CN 113819291 B CN113819291 B CN 113819291B
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- wedge
- valve
- convex
- rotating shaft
- concave
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a knock-free valve cover device of a reciprocating pump, which comprises: the rotary shaft, the transmission shaft, the convex wedge, the concave wedge block, the valve box and the valve gland are arranged on the rotary shaft; a concave wedge block, a convex wedge, a transmission shaft and a rotating shaft are arranged in the valve box; the concave wedge block is internally provided with a convex wedge which is respectively movably connected with the convex wedge at the inner side and the valve box at the outer side; a rotating shaft is arranged in the convex wedge; the rotating shaft is movably connected with the transmission shaft; the transmission shaft is fixedly connected with the valve gland; the invention solves the problem that the valve cover device of the reciprocating pump needs to be installed and fixed and needs to be knocked by a hammer.
Description
Technical Field
The invention relates to the field of petroleum and natural gas pumping equipment, in particular to a knocking-free valve cover device of a reciprocating pump.
Background
The valve cover (also called gland) and the valve gland (also called gland plug) of the reciprocating pump are arranged in the cavity of the valve box. When replacing valve seats of valve bodies and other wearing parts inside valve cavities of reciprocating pumps, the valve covers are usually unscrewed and removed, and then the valve covers are taken out, so that the valve bodies, the valve seats and other wearing parts inside valve boxes can be replaced and maintained. On the contrary, after the valve seat of the valve body and other quick-wear parts inside the valve box are replaced, in order to maintain the pressure-bearing tightness of the cavity inside the valve box, the valve gland and the valve box need to be attached in a seamless manner, and the valve gland is completely fixed by means of the pressing acting force of the valve cover.
Most valve covers of the existing reciprocating pumps are connected with a valve box body through large-size thread pairs, thread pre-tightening between the valve covers and the valve box needs very large tightening torque, the valve covers are pre-tightened by knocking a valve cover wrench through a hammer in the most common mode at present, and the hammer is used for knocking the valve cover wrench to cause very large operation risks, so that equipment damage and personal injury accidents are easily caused by accidents.
Since the valve cover is frequently subjected to the alternating load of the liquid pressure generated during the suction and discharge operations of the reciprocating pump delivery medium during the operation, the valve cover and the valve cover are very easily loosened under the alternating load to cause the leakage of the reciprocating pump delivery medium.
In the process of knocking the valve cover to pre-tighten the hammer, the pre-tightening force finally applied to the valve cover cannot be accurately and quantitatively controlled, and when the pre-tightening force is too small, the thread of the valve cover is unscrewed, and finally the valve cover is loosened. When the pretightening force is too large, the thread pair between the valve cover and the valve box is damaged, so that the valve box and the threads of the valve cover are damaged.
Disclosure of Invention
Aiming at the defects in the prior art, the knocking-free valve cover device for the reciprocating pump provided by the invention solves the problem that a hammer needs to knock when the valve cover device for the reciprocating pump is fixedly installed.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a reciprocating pump slam-free valve cover apparatus comprising: the rotary shaft, the transmission shaft, the convex wedge, the concave wedge block, the valve box and the valve gland are arranged on the rotary shaft;
a concave wedge block, a convex wedge, a transmission shaft and a rotating shaft are arranged in the valve box; the concave wedge block is internally provided with a convex wedge which is respectively movably connected with the convex wedge at the inner side and the valve box at the outer side; a rotating shaft is arranged in the convex wedge; the rotating shaft is movably connected with the transmission shaft; the transmission shaft is fixedly connected with the valve gland.
Further, still include: the top cover is positioned between the rotating shaft and the convex wedge; the top cover is fixedly connected with the convex wedge.
Further, still include: and the top cover is fixedly connected with the convex wedge through the top cover screw.
Furthermore, trapezoidal transmission screw threads are arranged on the contact surface of the rotating shaft and the transmission shaft.
Furthermore, the rotating shaft and the transmission shaft form a thread transmission mechanism.
Further, the female wedge comprises: the fan-shaped wedge blocks are in the same shape, and each fan-shaped wedge block is provided with an upper end spring groove and a lower end spring groove.
Further, an upper return spring is arranged in the upper end spring groove, and a lower return spring is arranged in the lower end spring groove.
Furthermore, the outer circle surface between the upper end spring groove and the lower end spring groove on the fan-shaped wedge block is provided with a plurality of working inclined planes, and the fan-shaped wedge block is matched with the inner circular step inclined plane of the valve box.
Furthermore, a guide pin is arranged between the adjacent segmental wedges.
In conclusion, the beneficial effects of the invention are as follows:
1. according to the invention, the rotating torque of the rotating shaft is converted into short-stroke large-load acting force through the wedge surface slide block mechanism, so that acting force required for compressing the valve gland is formed, the process of directly knocking the valve cover to compress the valve gland by a hammer is avoided, the labor intensity of an operator is greatly reduced, and the operation safety of field personnel is greatly improved.
2. According to the knocking-free valve cover device, different rotating torques can be applied to the rotating shaft by adopting quantitative tools according to valve covers with different specifications, such as a torque wrench and the like. The final stress of the valve cover is accurately controlled, so that the service life of the valve cover device of the reciprocating pump is greatly prolonged.
Drawings
FIG. 1 is a schematic structural view of a knock-free valve cover assembly for a reciprocating pump;
wherein, 1, a rotating shaft; 2. a top cover; 3. a drive shaft; 4. a top cover screw; 5. a convex wedge; 6. an upper return spring; 7. a concave wedge block; 8. a guide pin; 9. a valve box; 10. a lower return spring; 11. a valve gland; 12. a valve cover sealing ring; 13. a valve spring; 14. a valve body; 15. conical valve rubber; 16. a valve seat; 17. and a lower sealing ring.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, a knock-free valve cover assembly for a reciprocating pump includes: the device comprises a rotating shaft 1, a transmission shaft 3, a convex wedge 5, a concave wedge 7, a valve box 9 and a valve gland 11;
a concave wedge 7, a convex wedge 5, a transmission shaft 3 and a rotating shaft 1 are arranged in the valve box 9; a convex wedge 5 is arranged in the concave wedge 7 and is respectively movably connected with the convex wedge 5 at the inner side and the valve box 9 at the outer side; a rotating shaft 1 is arranged in the convex wedge 5; the rotating shaft 1 is movably connected with the transmission shaft 3; the transmission shaft 3 is fixedly connected with the valve gland 11.
This device still includes: the top cover 2 is positioned between the rotating shaft 1 and the convex wedge 5; the top cover 2 is fixedly connected with the convex wedge 5.
This device still includes: and the top cover 2 is fixedly connected with the convex wedge 5 through the top cover screw 4.
The contact surface of the rotating shaft 1 and the transmission shaft 3 is provided with trapezoidal transmission threads, and the rotating shaft 1 and the transmission shaft 3 form a thread transmission mechanism.
The concave wedge 7 comprises: the fan-shaped wedge blocks are in the same shape, and each fan-shaped wedge block is provided with an upper end spring groove and a lower end spring groove. An upper return spring 6 is arranged in the upper end spring groove, and a lower return spring 10 is arranged in the lower end spring groove. The outer circle surface between the upper end spring groove and the lower end spring groove on the fan-shaped wedge block is provided with a plurality of working inclined planes, and the fan-shaped wedge block is matched with the inner circle step inclined plane of the valve box 9. And a guide pin 8 is arranged between the adjacent fan-shaped wedges.
The upper return spring 6 and the lower return spring 10 act: when the convex wedge 5 moves from bottom to top under the drive of the rotating shaft 1, the sector wedges are automatically folded and gathered inwards by the aid of acting forces of the upper return spring 6 and the lower return spring 10, and the working surfaces of the inclined plane sliding blocks between the concave wedge 7 and the convex wedge 5 are kept attached.
In this embodiment, the concave wedge 7 is six fan-shaped wedges with the same shape (the number of the specific fan-shaped wedges is set as required), the six fan-shaped wedges form a concave wedge ring, the concave wedge ring is formed by processing six equal parts of the circumference, and the upper end spring groove and the lower end spring groove of the outer circle of each concave wedge 7 are respectively provided with a circle of reset spring. And guide pins 8 are arranged among the six fan-shaped wedges to limit the position of the concave wedge 7 when the concave wedge 7 is spread outwards or folded inwards. The excircle of the concave wedge block 7 is provided with a plurality of working inclined planes which are matched with the inner inclined plane of the valve box 9 to form a sliding inclined plane; the inner conical surfaces of all the concave wedges 7 enclose an approximate conical surface and are matched with the outer conical surfaces of the convex wedges 5 to form a sliding conical surface.
In the present embodiment, one end of the transmission shaft 3 is embedded in the rotating shaft 1, and the other end thereof is embedded in the valve cover 11, and the transmission shaft and the valve cover 11 can be fixedly connected by welding or the like, and can also be fixedly connected by other methods.
The specific working process is as follows: when the rotating shaft 1 is rotated, the rotating shaft 1 moves downwards along the axis through thread transmission to drive the convex wedge 5 to move downwards, and the outer circle surface of the convex wedge 5 is of a taper structure. When the convex wedge 5 moves downwards, the slide block matching surface formed by the convex wedge 5 and the concave wedge 7 drives the six fan-shaped wedges to expand in the diameter direction and displace along the radial direction.
When the six fan-shaped wedges expand and move radially outwards, the concave wedges 7 move axially downwards along the inclined plane to press the valve gland 11 due to the relative displacement principle (the valve box 9 is fixed) because the concave wedges 7 and the inner wedge surface of the valve box 9 form an inclined plane slide block mechanism. The tightening torque of the rotating shaft can be accurately controlled by means of a tool, so that the pre-tightening force applied to the valve gland 11 can be accurately controlled.
Because the mechanism utilizes the principle of a wedge block mechanism twice, the long-stroke rotating torque of the rotating shaft 1 is greatly converted into short-stroke large-load acting force through the wedge block wedge surface slide block mechanism, so that the acting force required by compressing the valve cover 11 is formed, the process of directly knocking the valve cover to compress the valve cover 11 by a hammer is avoided, the labor intensity of an operator is greatly reduced, and the working safety of operators is improved.
Secondly, by the knocking-free valve cover device, different rotating torques can be applied to the rotating shaft 1 by adopting quantification tools according to the sizes of valve covers with different specifications, such as a torque wrench and the like. The final stress of the valve cover 11 is accurately controlled, so that the service life of the valve cover device of the reciprocating pump is greatly prolonged.
Fig. 1 also includes: the valve cover sealing ring 12, the valve spring 13, the valve body 14, the conical surface valve rubber 15, the valve seat 16 and the lower sealing ring 17.
The surface of the valve gland 11 is composed of outer cylindrical surfaces with different sizes and diameters, and cylindrical step surfaces are arranged on the outer cylindrical surfaces with different diameters. The cylindrical step surface of the valve gland 11 is contacted with the step inside the valve box 9 to form an axial positioning step between the valve gland 11 and the valve box 9. The valve gland 11 bears the downward pressing force of the concave wedge 7 under the positioning of the axial positioning step.
The cylindrical outer surface of the valve gland 11 is provided with a valve bonnet sealing ring 12, so that the valve gland 11 is in fit contact with the inner hole cylindrical surface of the valve box 9 to form valve cavity sealing.
A valve spring 13, a valve body 14, a conical valve rubber 15 and a valve seat 16 are sequentially arranged below the valve gland 11.
The contact part of the valve seat 16 and the valve box 9 is provided with a lower sealing ring 17 for forming a closed cavity.
The valve spring 13 mainly functions that when the valve body 14 is opened upwards and separated from the working contact surface of the valve seat 16, the valve spring 13 forms a limiting acting force on the valve body 14 to ensure that the valve body 14 and the valve seat 16 are kept in a closed state constantly under the action of no external force, and meanwhile, the valve spring 13 plays a role in buffering the valve body 14 in the process of frequent opening and closing movement.
The valve body 14 is mainly used for installing a conical valve rubber 15, so that the conical valve rubber is matched with a working surface of a matched valve seat 16 to form a sealing surface, through-flow and sealing effects are formed on fluid, and opening and closing effects between the conical valve rubber 15 and the valve seat 16 are achieved.
The main function of the valve seat 16 is to ensure that the whole valve seat 16 can be always correctly installed in the conical hole in the valve box 9 by the self-centering principle of the cone through the self external conical surface; and a working sealing surface which is contacted with the conical surface valve rubber 15 is arranged on the valve seat 16 to form a through-flow or cutoff effect on overflowing media, so that the opening and closing effect between the valve conical surface valve rubber 15 and the valve seat 16 is achieved.
Claims (7)
1. A reciprocating pump knock-free valve cover device, comprising: the device comprises a rotating shaft (1), a transmission shaft (3), a convex wedge (5), a concave wedge block (7), a valve box (9) and a valve gland (11);
a concave wedge block (7), a convex wedge (5), a transmission shaft (3) and a rotating shaft (1) are arranged in the valve box (9); the concave wedge block (7) is internally provided with a convex wedge (5) which is movably connected with the convex wedge (5) at the inner side and a valve box (9) at the outer side respectively; a rotating shaft (1) is arranged in the convex wedge (5); the rotating shaft (1) is movably connected with the transmission shaft (3); the transmission shaft (3) is fixedly connected with the valve gland (11);
the concave wedge (7) comprises: the wedge comprises a plurality of fan-shaped wedge blocks with the same shape, a concave wedge ring consisting of the fan-shaped wedge blocks with the same shape, and an upper end spring groove and a lower end spring groove which are arranged on each fan-shaped wedge block;
an upper reset spring (6) is arranged in a spring groove at the upper end, a lower reset spring (10) is arranged in a spring groove at the lower end, and the sector wedges are automatically folded inwards and gathered by the acting force of the upper reset spring (6) and the lower reset spring (10) between the sector wedges to keep the working surfaces of the inclined plane sliding blocks between the concave wedge blocks (7) and the convex wedges (5) attached;
when the rotating shaft (1) is rotated, the rotating shaft (1) can move up and down along the transmission shaft (3) to drive the top cover (2) and the convex wedge (5) to move up and down;
the convex wedge (5) and the concave wedge (7) form a slide block matching surface, so that the plurality of fan-shaped wedges are driven to expand in the diameter direction and displace in the radial direction;
when the fan-shaped wedge blocks expand and move radially outwards, the surfaces of the concave wedge blocks (7) and the inner wedge of the valve box (9) form an inclined plane sliding block mechanism, the valve box (9) is fixed, and the concave wedge blocks (7) move axially downwards along the inclined plane to press the valve gland (11).
2. The reciprocating pump slam-free valve cover apparatus of claim 1, further comprising: the top cover (2), the said top cover (2) locates between spindle (1) and convex wedge (5); the top cover (2) is fixedly connected with the convex wedge (5).
3. The reciprocating pump slam-free valve cover apparatus of claim 2, further comprising: the top cover (2) is fixedly connected with the convex wedge (5) through the top cover screw (4).
4. The reciprocating pump knocking-free valve cover device as claimed in claim 1, wherein the contact surface of the rotating shaft (1) and the transmission shaft (3) is provided with trapezoidal transmission threads.
5. The reciprocating pump knock-free valve cover device according to claim 1, wherein the rotating shaft (1) and the transmission shaft (3) form a threaded transmission mechanism.
6. A reciprocating pump knock-free valve cover assembly according to claim 1, wherein the outer circumferential surface of the sector wedge between the upper end spring groove and the lower end spring groove is provided with a plurality of working ramps, and the sector wedge is fitted with an inner circular step ramp of the valve housing (9).
7. A reciprocating pump slam-free valve cover assembly according to claim 1, wherein guide pins (8) are provided between adjacent segmental wedges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111409476.7A CN113819291B (en) | 2021-11-25 | 2021-11-25 | Reciprocating pump knocking-free valve cover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111409476.7A CN113819291B (en) | 2021-11-25 | 2021-11-25 | Reciprocating pump knocking-free valve cover device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113819291A CN113819291A (en) | 2021-12-21 |
| CN113819291B true CN113819291B (en) | 2022-02-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111409476.7A Active CN113819291B (en) | 2021-11-25 | 2021-11-25 | Reciprocating pump knocking-free valve cover device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113819291B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0690959A1 (en) * | 1993-02-27 | 1996-01-10 | ITT Automotive Europe GmbH | Pump |
| CN201081016Y (en) * | 2007-09-18 | 2008-07-02 | 王兆林 | Locking key type water controlling valve |
| CN102707089A (en) * | 2012-06-21 | 2012-10-03 | 常州大学 | Device for measuring movement acceleration of valve disk of pump valve of reciprocation pump |
| KR101869970B1 (en) * | 2017-01-18 | 2018-06-21 | 박용호 | Counterpressure correspondence gate valve |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB588021A (en) * | 1945-01-25 | 1947-05-12 | Cedric Morris | Improvements in safety caps or closure members for pressure vessels |
| DE19536902A1 (en) * | 1995-10-04 | 1997-04-10 | Boehringer Ingelheim Int | Miniature fluid pressure generating device |
| US9291277B2 (en) * | 2012-01-13 | 2016-03-22 | Caldera Engineering, Lc | Plug head assemblies |
| GB201313338D0 (en) * | 2013-07-26 | 2013-09-11 | Delphi Tech Holding Sarl | High Pressure Pump |
| CN104712544B (en) * | 2015-01-26 | 2016-09-28 | 宝鸡石油机械有限责任公司 | A kind of anti-loose method of drilling pump valve gap |
| CN106837773B (en) * | 2016-12-22 | 2019-11-15 | 阳江市迪迦机电实业有限公司 | Check valve type diaphragm pump cover |
| CN208804318U (en) * | 2018-09-04 | 2019-04-30 | 宁波埃美柯铜阀门有限公司 | A kind of antitheft check function blind rod type shut-off valve of band |
| CN211082232U (en) * | 2019-09-27 | 2020-07-24 | 青岛天时油气装备服务集团股份有限公司 | Device is changed to slush pump valve gap |
-
2021
- 2021-11-25 CN CN202111409476.7A patent/CN113819291B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0690959A1 (en) * | 1993-02-27 | 1996-01-10 | ITT Automotive Europe GmbH | Pump |
| CN201081016Y (en) * | 2007-09-18 | 2008-07-02 | 王兆林 | Locking key type water controlling valve |
| CN102707089A (en) * | 2012-06-21 | 2012-10-03 | 常州大学 | Device for measuring movement acceleration of valve disk of pump valve of reciprocation pump |
| KR101869970B1 (en) * | 2017-01-18 | 2018-06-21 | 박용호 | Counterpressure correspondence gate valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113819291A (en) | 2021-12-21 |
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