CN112228337A - Disassembly and assembly structure of reciprocating pump valve cover - Google Patents
Disassembly and assembly structure of reciprocating pump valve cover Download PDFInfo
- Publication number
- CN112228337A CN112228337A CN202011285574.XA CN202011285574A CN112228337A CN 112228337 A CN112228337 A CN 112228337A CN 202011285574 A CN202011285574 A CN 202011285574A CN 112228337 A CN112228337 A CN 112228337A
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- Prior art keywords
- valve cover
- reciprocating pump
- valve
- thread
- disassembly
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- 238000012856 packing Methods 0.000 claims 2
- 238000005452 bending Methods 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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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
- 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
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a disassembly and assembly structure of a reciprocating pump valve cover, which relates to the field of petroleum engineering equipment, in particular to a disassembly and assembly structure of a reciprocating pump valve cover, comprising an upper cavity part of a reciprocating pump valve box, a non-separating washer, a valve cover, a hollow bolt, a cap washer, a nut, a stud, an elongated sleeve and a lifting screw, wherein the structure realizes that the valve cover with extra large torque is quantitatively applied by a common small automatic wrench, a disassembly device does not increase the maximum excircle size of the original valve cover, namely the bending moment value during the disassembly and the assembly of the valve cover is minimum, the specification of the sleeve for the assembly and the disassembly of the valve cover is unchanged, the anticorrosive surface of the end surface of a hydraulic cylinder cannot be damaged during the disassembly of the valve cover, finally the valve cover can be effectively ensured to be fastened without loosening, the sealing effect is ensured, the stress under the high-pressure working condition inside the valve box is effectively reduced, and, the use cost and the maintenance cost of the reciprocating pump are reduced, and the working reliability and the working efficiency of the reciprocating pump are improved.
Description
Technical Field
The invention belongs to the technical field of petroleum engineering equipment, and particularly relates to a disassembly and assembly structure of a reciprocating pump valve cover.
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:
the reciprocating pump utilizes the valve box to inject high-pressure slurry into the ground, 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 need to be replaced, the door is opened, and when the valve box works, the door is closed, and the door is a valve cover. Therefore, the valve cover has the function of controlling 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; when the valve is closed, the very high pressure mud in the valve box must be sealed, so that the high pressure mud is prevented from leaking; because the valve cover works under the condition that high-pressure slurry in the valve box is alternating load, if the valve cover is not prestressed enough, the valve cover is easy to loosen, the high-pressure slurry can be leaked after the valve cover is loosened, threads of a hydraulic cylinder can be damaged, even a cylinder is punctured and other safety accidents are generated, the higher the pressure in the valve box is, the higher the failure probability of the valve cover is, along with the increasing difficulty of oil exploitation, the higher the pressure of a reciprocating pump is required, in order to meet the requirements of the reciprocating pump, the valve cover of the reciprocating pump is continuously improved and designed in all countries in the world, the improvement of the valve cover is bound to continuously improve the disassembly and assembly of the valve cover, for example, the invention is a valve cover and a matched valve box of the reciprocating pump, which are officially accepted by the national invention office in 1 month and 7 in 2020, the application number is 202020022455.4, the invention application number is 202010012389.7 is the latest valve cover structure, the invention has, has the following characteristics: (1) the problem that the traditional valve cover screwed by one large thread of the valve cover is changed into more than 10 small thread screwed valve covers, the torque value of the original thread is reduced by more than 10 times, the valve cover can be screwed by a common, light and small automatic (pneumatic or electric) torque wrench tool, and the current situation that the valve cover cannot be pressed tightly or can be pressed tightly by a professional large and heavy torque wrench is solved; (2) the valve cover and the matched valve box are in interference fit by the conical surface, 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 and greatly prolonging the fatigue life of the valve box; (3) the valve cover and the valve box are matched by a long conical surface, and the positioning is very accurate during installation. The invention focuses on the function of the novel valve cover, and the disassembly of the novel valve cover belongs to the task of the invention, and the disassembly of the valve cover with large interference becomes the problem to be solved by the invention because the pressure of the valve cover on the conical surface is as high as 1000000N or higher and the conical surface generates very large interference.
Disclosure of Invention
The invention aims to provide a disassembly and assembly structure of a reciprocating pump valve cover.
The technical scheme of the invention is as follows:
a disassembly and assembly structure of a reciprocating pump valve cover comprises a reciprocating pump valve box upper cavity part, a non-separating washer, a valve cover, a hollow bolt, a cap washer, a nut, a stud, a lengthened sleeve and a lifting screw, wherein the reciprocating pump valve box upper cavity part is provided with an inner conical surface, a screw hole of an upper end surface and an upper end surface, the non-separating washer is provided with a lower end surface, a lower end inner hole, a lower surface of an inner cavity, an upper end surface, an outer circle and a middle inner hole, the valve cover is provided with an outer conical surface, an upper surface of a screw hole counter bore, a screw hole, an upper end surface inner thread, an upper end surface and a large end outer circle, the hollow bolt is provided with a lower surface of a lower section thread, a lower section outer thread, an upper surface of a lower section thread, a middle section outer thread, an inner hole and an upper section outer hexagon, the cap, the double-end stud is provided with a lower end thread and an upper end thread, the lengthening sleeve is provided with a lower section inner hexagonal shape, a middle section inner hole and an upper section inner square shape, and the lifting bolt is provided with a thread surface.
The lower end thread of the stud is installed in a screw hole of the upper end face of the upper cavity part of the reciprocating pump valve box to serve as a component 1, lower-section external threads and middle-section external threads of the hollow bolt are screwed into the screw hole of the valve cover, the lower-section external threads of the hollow bolt are screwed out of the screw hole of the valve cover, the upper-end screw hole of the non-separating washer is screwed through the lower-section external threads of the hollow bolt, the lower-section external threads of the hollow bolt freely move up and down between the lower surface of the inner cavity of the non-separating washer and the upper surface of the inner cavity, the hollow bolt is rotated in the opposite direction, the upper end face of the non-separating washer is in contact with the upper surface of a counter bore of. The assembled assembly 1 is arranged in an assembled assembly 2, wherein the upper end thread of the stud penetrates through the inner hole of the hollow bolt, the outer conical surface of the valve cover is in contact fit with the inner conical surface of the upper cavity part of the reciprocating pump valve box, the large inner hole and the small inner hole of the inner cavity of the cap washer are in threaded fit with the upper end surface of the cap washer through the upper end thread of the stud, the inner hole thread of the nut is screwed into the upper end thread of the stud, the lower end surface of the nut is in contact with the upper end surface of the cap washer, the inner hexagon of the lower section of the lengthening sleeve is matched with the outer hexagon of the nut, the inner hexagon of the upper section of the lengthening sleeve can quantitatively apply specified torque to the nut through a common small-sized automatic wrench, and the valve cover and the upper cavity part of the reciprocating;
the nut and the cap washer are disassembled, the lower section inner hexagon of the lengthened sleeve is matched with the upper section outer hexagon of the hollow bolt, the hollow bolt and the non-separating washer can move downwards until the lower end face of each non-separating washer is contacted with the upper end face of the upper cavity part of the reciprocating pump valve box, the lower face of the lower section thread of each hollow bolt is contacted with the lower end face of the non-separating washer, then the automatic wrench is formally used for applying torque to the upper section outer hexagon of the hollow bolt, the interference fit between the valve cover and the upper cavity part of the reciprocating pump valve box can be eliminated, and the disassembling work of the valve cover of the reciprocating pump is completed.
By adopting the structure, the sizes of the outer hexagon of the nut and the outer hexagon of the upper section of the hollow bolt are designed to be the same, and the inner hole structure of the middle section of the lengthened sleeve is designed, so that the lengthened sleeve with the same specification can be used for completing the dismounting work of the valve cover of the reciprocating pump.
By adopting the structure, the distance between the excircle of the inseparable gasket and the excircle of the large end of the valve cover is less than or equal to 1.5mm, so that the valve cover can not generate additional bending moment on the valve cover under the condition of very large pressure on the installation and the disassembly of the valve cover.
By adopting the structure, when the valve cover is disassembled and the hollow bolt is rotated, the lower surface of the lower section thread of the hollow bolt and the lower surface of the inner cavity of the inseparable gasket rotate relatively, so that the lower end surface of the inseparable gasket and the upper end surface of the reciprocating pump valve box are ensured not to rotate, and the antirust treatment layer on the upper end surface of the reciprocating pump valve box is prevented from being damaged.
Drawings
FIG. 1 is an assembled sectional view showing a structure for disassembling and assembling a valve cover of a reciprocating pump according to the present invention;
FIG. 2 is an assembled top view of a valve cover assembly and disassembly structure of a reciprocating pump according to the present invention;
FIG. 3 is a schematic sectional view of the valve cover of the reciprocating pump according to the present invention;
FIG. 4 is a schematic sectional view of a portion of the upper chamber of the valve housing of the reciprocating pump of the present invention;
FIG. 5 is a top view of a portion of the upper chamber of the valve housing of the reciprocating pump of the present invention;
FIG. 6 is a schematic cross-sectional view of a non-separating gasket in accordance with the present invention;
FIG. 7 is a schematic cross-sectional view of a valve cover according to the present invention;
FIG. 8 is a schematic cross-sectional view of a hollow bolt according to the present invention;
FIG. 9 is a schematic cross-sectional view of a cap gasket in accordance with the present invention;
FIG. 10 is a schematic cross-sectional view of a nut of the present invention;
FIG. 11 is a schematic view of a stud according to the present invention;
FIG. 12 is a schematic cross-sectional view of an extension sleeve of the present invention;
FIG. 13 is a schematic view of the assembly of the upper chamber portion and the stud of the valve housing of the reciprocating pump of the present invention;
FIG. 14 is a schematic view of the bonnet hollow bolt cap washer eyebolt assembly of the present invention;
figure 15 is a schematic view of an eye screw of the present invention.
The reference numbers are as follows:
an upper cavity part-1 of a reciprocating pump valve box; no separation of the gasket-2; a valve cover-3; a hollow bolt-4; a cap washer-5; a nut-6; a stud-7; a lengthened sleeve-8; lifting ring screw-9; an inner conical surface-1 a of the upper cavity part of the reciprocating pump valve box; a screw hole-1 b on the upper end surface of the upper cavity part of the reciprocating pump valve box; the upper end face-1 c of the upper cavity part of the reciprocating pump valve box; the lower end surface-2 a of the gasket is not separated; the inner hole-2 b at the lower end of the gasket is not separated; the lower surface-2 c of the inner cavity of the gasket is not separated; the upper surface-2 d of the inner cavity of the gasket is not separated; the screw hole-2 e at the upper end of the gasket is not separated; the upper end face-2 f of the gasket is not separated; the excircle-2 g of the gasket is not separated; the inner hole in the middle of the inner cavity of the gasket is not separated for-2 h; the outer conical surface-3 a of the valve cover; the upper surface-3 b of the counter bore of the valve cover screw hole; a screw hole-3 c of the valve cover; the upper end face of the valve cover is internally threaded-3 d; the upper end face-3 e of the valve cover; the lower surface-4 a of the lower section thread of the hollow bolt; the lower section of the hollow bolt is provided with an external thread-4 b; the upper surface-4 c of the lower section thread of the hollow bolt; external threads-4 d at the middle section of the hollow bolt; inner hole-4 e of hollow bolt; the outer hexagon of the upper section of the hollow bolt is-4 f; the lower end face-5 a of the cap washer; the inner cavity of the cap gasket is provided with a large inner hole-5 b; a small inner hole-5 c of the cap gasket inner cavity; the upper end face-5 d of the hat gasket; the lower end surface-6 a of the nut; nut bore threads-6 b; hexagonal outside the nut-6 c; the lower end of the stud is provided with threads-7 a; the upper end of the stud is threaded-7 b; the lower section of the lengthened sleeve is internally provided with a hexagon-8 a; an inner hole-8 b in the middle section of the lengthened sleeve; the upper section of the lengthened sleeve is internally provided with a square-8 c; eye screw flank-9 a.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The embodiments of the present invention are not limited to the following examples, and various changes made without departing from the spirit of the present invention are within the scope of the present invention.
Referring to fig. 1, the present embodiment includes an upper chamber portion 1 of a reciprocating pump valve box, a non-separating washer 2, a valve cover 3, a hollow bolt 4, a cap washer 5, a nut 6, a stud bolt 7, an elongated sleeve 8, and a lifting ring screw 9.
Referring to fig. 4, 11 and 13, in the present embodiment, the lower end threads 7a of the stud are first installed in the screw hole 1b of the upper end surface of the upper chamber portion of the reciprocating pump valve housing.
Referring to fig. 6, 7, 8, 14 and 15, in this embodiment, the lower external thread 4b and the middle external thread 4d of the hollow bolt are firstly screwed into the screw hole 3c of the valve cap, wherein the lower external thread 4b of the hollow bolt is screwed out of the screw hole 3c of the valve cap, then the upper screw hole 2e of the non-separating washer is screwed through the lower external thread 4b of the hollow bolt, so that the lower external thread 4b of the hollow bolt freely moves up and down between the lower surface 2c of the inner cavity of the non-separating washer and the upper surface 2d of the inner cavity of the non-separating washer, and then the hollow bolt 4 is rotated in the opposite direction, so that the upper surface 2f of the non-separating washer is in contact with the upper surface 3b of the counter bore of the valve cap screw hole, and the threaded surface 9a of the lifting ring screw is screwed into the upper surface.
Referring to fig. 1, 2, 4, 7, 12, 13 and 14, in this embodiment, the assembly assembled in fig. 14 is installed in the assembly assembled in fig. 13, wherein the upper end thread 7b of the stud bolt passes through the inner hole 4e of the hollow bolt, the outer conical surface 3a of the bonnet contacts and matches with the inner conical surface 1a of the upper cavity of the reciprocating pump valve box, the large inner hole 5b of the cap washer inner cavity and the small inner hole 5c of the cap washer inner cavity pass through the upper end thread 7b of the stud bolt, so that the lower end surface 5a of the cap washer contacts with the upper end surface 3e of the bonnet, the inner thread 6b of the nut is screwed into the upper end thread 7b of the stud bolt, so that the lower end surface 6a of the nut contacts with the upper end surface 5d of the cap washer, the inner hexagon 8a of the lower section of the extension sleeve is matched with the outer hexagon 6c of the nut, and the square 8c of the upper section of, the external conical surface 3a of the valve cover and the internal conical surface 1a of the upper cavity part of the reciprocating pump valve box are in specified interference fit, the specified torque is applied to a plurality of nuts quantitatively by using an automatic wrench to be crossed, and the distance between the external circle 2g of the non-separating washer and the external circle 3f of the large end of the valve cover is less than or equal to 1.5mm, so that the additional bending moment on the valve cover can not be generated under the condition that the pressure applied to the valve cover during installation (or disassembly) is very large.
Referring to fig. 1, 3, 13 and 14, in this embodiment, the nut 6 and the cap washer 5 in fig. 1 are removed, the lower inner hexagon 8a of the extension sleeve is matched with the upper outer hexagon 4f of the hollow bolt, the upper outer hexagon 4f of the hollow bolt is easily rotated by an automatic wrench, the hollow bolt 4 and the non-separating washer 2 move downwards until the lower end face 2a of each non-separating washer contacts with the upper end face 1c of the upper chamber of the reciprocating pump valve box, the lower face 4a of the lower thread of each hollow bolt 4 contacts with the lower end face 2c of the non-separating washer 2, as shown in fig. 3, then the torque is formally applied to the upper outer hexagon 4f of the hollow bolt by the automatic wrench, so that the interference fit between the outer conical surface 3a of the valve cover and the inner conical surface 1a of the upper chamber of the reciprocating pump valve box can be eliminated, and the situation shown in fig. 13 and 14 is separated, the disassembly work of the valve cover is completed.
Referring to fig. 8, 10 and 12, in the present embodiment, the size of the nut outer hexagon 6c is designed to be the same as that of the hollow bolt upper section outer hexagon 4f, and the structure of the middle section inner hole 8b of the extension sleeve is also designed, so that the same kind of reciprocating pump valve cover can be disassembled by using the extension sleeve with the same specification.
Referring to fig. 3, when the valve cover is disassembled and the hollow bolt 4 is rotated, the lower surface 4a of the lower section thread of the hollow bolt and the lower surface 2c of the inner cavity of the non-separating washer rotate relatively, so that the lower end surface 2a of the non-separating washer and the upper end surface 1c of the reciprocating pump valve box are ensured not to rotate, and the rust-proof treatment layer of the upper end surface 1c of the reciprocating pump valve box is prevented from being damaged.
The above detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art, and these changes are within the protection of the present invention and also within the protection scope of the present invention.
Claims (6)
1. The utility model provides a dismouting structure of reciprocating pump valve gap, includes reciprocating pump valve case epicoele part (1), does not separate packing ring (2), valve gap (3), hollow bolt (4), cap packing ring (5), nut (6), stud (7), extension sleeve (8), eyebolt (9), its characterized in that:
the reciprocating pump valve box upper cavity part (1) is provided with an inner conical surface (1 a), a screw hole (1 b) on the upper end surface and an upper end surface (1 c) on the reciprocating pump valve box upper cavity part;
the non-separating washer (2) is provided with a non-separating washer lower end face (2 a), a non-separating washer lower end inner hole (2 b), a non-separating washer inner cavity lower face (2 c), an inner cavity upper face (2 d), an upper end screw hole (2 e), a non-separating washer upper end face (2 f), an outer circle (2 g) and a middle inner hole (2 h);
the valve cover (3) is provided with an external conical surface (3 a), an upper surface (3 b) of a screw hole counter bore, a screw hole (3 c) of the valve cover, an internal thread (3 d) of an upper end surface, an upper end surface (3 e) and a large-end excircle (3 f);
the hollow bolt (4) is provided with a lower surface (4 a) of a lower section thread, a lower section external thread (4 b), an upper surface (4 c) of the lower section thread, a middle section external thread (4 d), an inner hole (4 e) and an upper section external hexagon (4 f);
the cap gasket (5) is provided with a cap gasket lower end surface (5 a), an inner cavity large inner hole (5 b), an inner cavity small inner hole (5 c) and a cap gasket upper end surface (5 d);
the nut (6) is provided with a nut lower end face (6 a), an inner hole thread (6 b) and an outer hexagon (6 c);
the stud (7) is provided with a lower end thread (7 a) and an upper end thread (7 b);
the lengthening sleeve (8) is provided with a lower section inner hexagonal (8 a), a middle section inner hole (8 b) and an upper section inner square (8 c);
the lifting eye screw (9) is provided with a thread surface (9 a).
2. A structure for attaching and detaching a valve cover of a reciprocating pump according to claim 1, wherein: each valve cover (3) needs to be provided with more than 8 inseparable washers (2), hollow bolts (4), cap washers (5), nuts (6) and double-end studs (7).
3. A structure for attaching and detaching a valve cover of a reciprocating pump according to claim 1, wherein: after the valve cover (3) is pressed by the maximum pressure, a gap must be ensured between the lower end surface (2 a) of the non-separating washer (2) and the upper end surface (1 c) of the upper cavity part of the valve box of the reciprocating pump.
4. A structure for attaching and detaching a valve cover of a reciprocating pump according to claim 1, wherein: the sizes of the outer hexagon (6 c) of the nut and the outer hexagon (4 f) of the upper section of the hollow bolt are designed to be the same, and the structure of an inner hole (8 b) of the middle section of the lengthened sleeve is also designed.
5. A structure for attaching and detaching a valve cover of a reciprocating pump according to claim 1, wherein: the distance between the excircle (2 g) of the unseparated washer and the excircle (3 f) of the large end of the valve cover is less than or equal to 1.5 mm.
6. A structure for attaching and detaching a valve cover of a reciprocating pump according to claim 1, wherein: when the valve cover is disassembled, the rust-proof treatment layer of the upper end surface (1 c) of the reciprocating pump valve box can not be damaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011285574.XA CN112228337A (en) | 2020-11-17 | 2020-11-17 | Disassembly and assembly structure of reciprocating pump valve cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011285574.XA CN112228337A (en) | 2020-11-17 | 2020-11-17 | Disassembly and assembly structure of reciprocating pump valve cover |
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| Publication Number | Publication Date |
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| CN112228337A true CN112228337A (en) | 2021-01-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011285574.XA Pending CN112228337A (en) | 2020-11-17 | 2020-11-17 | Disassembly and assembly structure of reciprocating pump valve cover |
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| CN (1) | CN112228337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718833A (en) * | 2022-03-08 | 2022-07-08 | 烟台杰瑞石油服务集团股份有限公司 | Bushing structure and hydraulic end valve box of fracturing pump |
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|---|---|---|---|---|
| CN114718833A (en) * | 2022-03-08 | 2022-07-08 | 烟台杰瑞石油服务集团股份有限公司 | Bushing structure and hydraulic end valve box of fracturing pump |
| CN114718833B (en) * | 2022-03-08 | 2024-01-23 | 烟台杰瑞石油服务集团股份有限公司 | Hydraulic end valve box of fracturing pump |
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