CN220687559U - Anti-drop pull rod for hydraulic end of fracturing pump - Google Patents
Anti-drop pull rod for hydraulic end of fracturing pump Download PDFInfo
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- CN220687559U CN220687559U CN202321798081.5U CN202321798081U CN220687559U CN 220687559 U CN220687559 U CN 220687559U CN 202321798081 U CN202321798081 U CN 202321798081U CN 220687559 U CN220687559 U CN 220687559U
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to an anti-drop pull rod for a hydraulic end of a fracturing pump, and belongs to the technical field of fracturing pumps. Including assembling in the internal pull rod of pump head, the pump head body offer with pull rod matched with connecting hole, the connecting hole includes first linkage segment, second linkage segment and the third linkage segment that sets gradually along the axial, second linkage segment diameter is greater than first linkage segment diameter and third linkage segment diameter, the pull rod passes in proper order first linkage segment second linkage segment and third linkage segment rear end threaded connection have the nut, the pull rod middle part be equipped with the joint in elastic locating ring in the second linkage segment, the elastic locating ring external diameter is greater than first linkage segment diameter and third linkage segment diameter, elastic locating ring inner wall keep away from the one end of nut with be equipped with axial limit structure between the pull rod. The utility model solves the problem that the pull rod is easy to loosen in the prior art.
Description
Technical Field
The utility model relates to an anti-drop pull rod for a hydraulic end of a fracturing pump, and belongs to the technical field of fracturing pumps.
Background
The hydraulic fracturing technology is one of the main measures for realizing the transformation of oil field reservoirs, increasing and stabilizing the yield, and can increase the oil gas yield by several times to tens times. Along with development of shale gas, the fracturing pump is used as a core component of fracturing complete equipment, and the requirements are higher and higher, and the fracturing pump is developed towards high pressure and large discharge capacity.
The fracturing pump mainly comprises two large parts, namely a power end and a hydraulic end, wherein the hydraulic end is fixed on a shell of the power end through a pull rod, and two ends of the pull rod are respectively in threaded connection with the hydraulic end and the power end. Since the hydraulic end of a frac pump is typically subjected to alternating loads of high pressure, this requires that the tie rod must have sufficient connection strength. The load working condition and the reciprocating working characteristic of the fracturing pump determine that fatigue fracture can occur after the pull rod reaches the service life, so that the pull rod at the hydraulic end of the pressure pump is separated from the pump head body, the use safety of the fracturing pump is threatened, and once the pull rod is separated, the danger and difficulty of maintenance work of the fracturing pump are greatly increased.
Aiming at the technical problems, the Chinese patent application No. CN201920484692.X discloses a hydraulic end anti-drop pull rod of a fracturing pump, which has the technical key points that: the pull rod is of a stepped shaft structure, and a first shaft section, a cylindrical second shaft section assembled with an anti-slip ring, a conical third shaft section, a cylindrical fourth shaft section and a fifth shaft section are sequentially arranged along the axial direction of the pull rod; the anticreep ring is installed in the outside of second shaft section, and the one end of anticreep ring is interior conical surface, and the shape looks adaptation of interior conical surface and third shaft section, and the other end of anticreep ring is the vertical face. When fatigue fracture occurs to the pull rod, the axial movement of the pull rod is limited by the cooperation of the pull rod and the inner conical surface of the anti-drop ring and the contact cooperation of the end surface of the anti-drop ring and the limiting end surface of the through hole of the pump head body, the axial reverse movement of the pull rod is limited by the screw cooperation between the screw cap and the pull rod and the contact cooperation of the end surface of the screw cap and the side surface of the pump head body, and the pull rod after fracture is effectively prevented from falling from the stepped through hole of the pump head body.
In the scheme, although the axial movement of the pull rod is limited through the cooperation of the nut and the stepped hole, the nut is loosened or even falls off due to vibration under the condition of long-time use, especially complex working conditions, so that the pull rod axially moves.
There is therefore a need to propose a new solution to this problem.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the utility model provides an anticreep pull rod for fracturing pump fluid end, it has solved the easy loose problem of pull rod among the prior art.
The technical problems to be solved by the utility model are realized by adopting the following technical scheme:
the utility model provides an anticreep pull rod for fracturing pump fluid end, is including assembling in the internal pull rod of pump head, the pump head body seted up with pull rod matched with connecting hole, the connecting hole includes first linkage segment, second linkage segment and the third linkage segment that sets gradually along the axial, second linkage segment diameter is greater than first linkage segment diameter and third linkage segment diameter, the pull rod passes in proper order first linkage segment second linkage segment and third linkage segment rear end threaded connection have the nut, the pull rod middle part be equipped with the joint in elastic locating ring in the second linkage segment, the elastic locating ring external diameter is greater than first linkage segment diameter and third linkage segment diameter, elastic locating ring inner wall is kept away from the one end of nut with be equipped with axial limit structure between the pull rod.
The utility model is further provided with: the pull rod comprises a first shaft section and a second shaft section, the diameter of the first connecting section is larger than that of the third connecting section, the diameter of the first shaft section is matched with that of the first connecting section, the diameter of the second shaft section is matched with that of the third connecting section, and the elastic positioning ring is located at one end, close to the first shaft section, of the second shaft section.
The utility model is further provided with: and in the state without external force, the length of the elastic positioning ring is longer than that of the second connecting section.
The utility model is further provided with: the part of the second shaft section, which is positioned in the elastic positioning ring, is provided with a conical surface with the diameter gradually increasing towards the direction of the first shaft section, and the inner wall of the elastic positioning ring is provided with an inner conical surface matched with the conical surface.
The utility model is further provided with: the axial limiting structure comprises a limiting ring groove which is formed in the circumferential wall of the pull rod and extends annularly around the circumferential direction of the pull rod, and a connecting ring which is fixedly connected to the inner wall of the elastic positioning ring and is clamped in the limiting ring groove.
The utility model is further provided with: a gasket is arranged between the nut and the pump head body.
The utility model is further provided with: the packing ring is close to the terminal surface of the pump head body is equipped with a plurality of first archs of evenly arranging around its circumference, a plurality of around the pump head surface set up the first recess of evenly arranging around pull rod circumference, first protruding one-to-one joint in the first recess, the packing ring is close to the terminal surface of nut is equipped with a plurality of second archs of evenly arranging around its circumference, a plurality of second recesses of evenly arranging around its circumference are seted up to the nut terminal surface, the protruding one-to-one joint of second in the second recess.
The utility model is further provided with: the first bulge and the second bulge are both arranged into hemispheres, and the first groove and the second groove are both arranged into hemispheres which are respectively matched with the first bulge and the second bulge.
The beneficial effects of the utility model are as follows:
1. through setting up the elastic locating ring and cooperating with the connecting hole, in the assembly process of the tie rod, when the tie rod passes the first linkage segment, the first linkage segment inner wall compresses the elastic locating ring, when the elastic locating ring passes the second linkage segment, the elastic locating ring is abutted against the end face of the third linkage segment, through threading the nut on the end after the tie rod is worn out, and constantly tighten the tie rod, make the elastic locating ring get into the second linkage segment completely, under the effort of first shaft segment and third linkage segment end face, the elastic locating ring external diameter expands, and full of the second linkage segment, make the elastic locating ring joint in first linkage segment and third linkage segment diameter, under the cooperation of the axial limit structure, limit the tie rod axially, thus reduce under the condition that the nut fails, the tie rod takes place the axial float even the situation that drops;
2. through the cooperation of the conical surface and the inner conical surface, when the pull rod moves towards the direction of the third connecting section, the end surface of the third connecting section pushes the elastic positioning ring to move towards the direction of the first shaft section, so that the outer diameter of the elastic positioning ring is increased, and the elastic positioning ring is more stable in the second connecting section;
3. under the cooperation of the limiting ring groove and the connection exchange, the pull rod and the elastic positioning ring are limited in the axial direction, so that the structure is more stable;
4. set up the packing ring between nut and the pump head body to set up first arch and first recess between packing ring and the pump head body and carry out spacingly, set up second arch and second recess between packing ring and nut and carry out spacingly, thereby lock the nut for the circumference position of the pump head body, reduce the condition that takes place not hard up inefficacy.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a partial enlarged view of a portion a in fig. 1.
In the figure: 1. a pump head body; 2. a pull rod; 3. a connection hole; 4. a first connection section; 5. a second connection section; 6. a third connecting section; 7. a first shaft section; 8. a second shaft section; 9. a screw cap; 10. an elastic positioning ring; 11. a limit ring groove; 12. a connecting ring; 13. conical surface; 14. an inner conical surface; 15. a gasket; 16. a first protrusion; 17. a first groove; 18. a second protrusion; 19. and a second groove.
Detailed Description
The utility model will be further described with reference to the following detailed drawings, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
As shown in fig. 1-2, an anti-drop pull rod 2 for a hydraulic end of a fracturing pump comprises a pull rod 2 assembled in a pump head body 1, wherein the pump head body 1 is provided with a connecting hole 3 matched with the pull rod 2, the connecting hole 3 comprises a first connecting section 4, a second connecting section 5 and a third connecting section 6 which are sequentially arranged along an axial direction, the diameter of the second connecting section 5 is larger than that of the first connecting section 4 and that of the third connecting section 6, the diameter of the first connecting section 4 is larger than that of the third connecting section 6, the pull rod 2 comprises a first shaft section 7 and a second shaft section 8, the diameter of the first shaft section 7 is matched with that of the first connecting section 4, the diameter of the second shaft section 8 is matched with that of the third connecting section 6, and the pull rod 2 sequentially penetrates through the first connecting section 4, the second connecting section 5 and the rear end part of the third connecting section 6 in a threaded connection with a nut 9.
The axial position between the pull rod 2 and the connecting hole 3 is limited, one end of the second shaft section 8, which is close to the first shaft section 7, is provided with an elastic positioning ring 10 which is clamped in the second connecting section 5, and the outer diameter of the elastic positioning ring 10 is larger than the diameter of the first connecting section 4 and the diameter of the third connecting section 6 under the condition of no external force, and the length of the elastic positioning ring 10 is larger than the length of the second connecting section 5.
The elastic locating ring 10 inner wall is kept away from and is equipped with axial limit structure between the one end of nut 9 and the pull rod 2, and axial limit structure is including seting up in the second shaft section 8 perisporium and being annular spacing annular 11 that extends around its circumference, fixed connection in elastic locating ring 10 inner wall and joint in spacing annular 11 go-between 12, wherein, spacing annular is located the one end that second shaft section 8 is close to first shaft section 7, under spacing annular and connection under the cooperation of trading to carry out axial spacing to pull rod 2 and elastic locating ring 10, the structure is more stable.
The part of the second shaft section 8 in the elastic positioning ring 10 is provided with a conical surface 13 with the diameter gradually increasing towards the direction of the first shaft section 7, the inner wall of the elastic positioning ring 10 is provided with an inner conical surface 14 matched with the conical surface 13, the inner conical surface 14 is in a concave groove shape, the conical surface 13 is clamped on the inner side of the inner conical surface 14, when the pull rod 2 moves towards the third connecting section 6, the end face of the third connecting section 6 pushes the elastic positioning ring 10 to move towards the direction of the first shaft section 7, the outer diameter of the elastic positioning ring 10 is increased, and the elastic positioning ring is more stable in the second connecting section 5.
In order to reduce the loosening of the nut 9, a washer 15 is provided between the nut 9 and the pump head body 1. The end face that the packing ring 15 is close to the pump head body 1 is equipped with a plurality of first archs 16 of evenly arranging around its circumference, and the pump head body 1 surface has been seted up a plurality of first recesses 17 of evenly arranging around pull rod 2 circumference, and first arch 16 one-to-one joint is in first recess 17, and the end face that the packing ring 15 is close to nut 9 is equipped with a plurality of second archs 18 of evenly arranging around its circumference, and the nut 9 terminal surface has been seted up a plurality of second recesses 19 of evenly arranging around its circumference, and second arch 18 one-to-one joint is in second recess 19. The first protrusion 16 and the second protrusion 18 are each provided in a hemispherical shape, and the first recess 17 and the second recess 19 are each provided in a hemispherical shape that respectively mates with the first protrusion 16 and the second protrusion 18.
The first bulge 16 and the first groove 17 are arranged between the gasket 15 and the pump head body 1 for limiting, the second bulge 18 and the second groove 19 are arranged between the gasket 15 and the nut 9 for limiting, so that the circumferential position of the nut 9 relative to the pump head body 1 is locked, and the occurrence of loosening failure is reduced.
The implementation principle of the utility model is as follows:
in the assembly process of the pull rod 2, when the pull rod 2 passes through the first connecting section 4, the inner wall of the first connecting section 4 compresses the elastic positioning ring 10, when the elastic positioning ring 10 passes through the second connecting section 5, the elastic positioning ring 10 is abutted against the end face of the third connecting section 6, the screw cap 9 is connected with the end part of the pull rod 2 after penetrating out, and the pull rod 2 is continuously tensioned, so that the elastic positioning ring 10 completely enters the second connecting section 5, under the acting force of the end faces of the first shaft section 7 and the third connecting section 6, the outer diameter of the elastic positioning ring 10 expands and fills the second connecting section 5, the elastic positioning ring 10 is clamped on the diameters of the first connecting section 4 and the third connecting section 6, and under the cooperation of an axial limiting structure, the axial limiting of the pull rod 2 is carried out, and the condition that the pull rod 2 axially moves or even falls off is reduced under the condition that the screw cap 9 fails.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, but is capable of various changes and modifications without departing from the spirit and scope of the utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (8)
1. A anticreep pull rod for fracturing pump fluid end, its characterized in that: including assembly in pump head body (1) pull rod (2), pump head body (1) seted up with tip threaded connection has nut (9) behind pull rod (2), connecting hole (3) are including first linkage segment (4), second linkage segment (5) and third linkage segment (6) that set gradually along the axial, second linkage segment (5) diameter is greater than first linkage segment (4) diameter and third linkage segment (6) diameter, pull rod (2) pass in proper order first linkage segment (4) second linkage segment (5) and third linkage segment (6), pull rod (2) middle part be equipped with joint in elastic locating ring (10) in second linkage segment (5), elastic locating ring (10) external diameter is greater than first linkage segment (4) diameter and third linkage segment (6) diameter, elastic locating ring (10) inner wall keep away from between one end of nut (9) and pull rod (2) are equipped with axial limit structure.
2. An anti-slip tie rod for a frac pump fluid end as in claim 1 wherein: the pull rod (2) comprises a first shaft section (7) and a second shaft section (8), the diameter of the first connecting section (4) is larger than that of the third connecting section (6), the diameter of the first shaft section (7) is matched with that of the first connecting section (4), the diameter of the second shaft section (8) is matched with that of the third connecting section (6), and the elastic positioning ring (10) is positioned at one end, close to the first shaft section (7), of the second shaft section (8).
3. An anti-slip tie rod for a frac pump fluid end as in claim 2 wherein: in the state without external force, the length of the elastic positioning ring (10) is longer than that of the second connecting section (5).
4. A drop-resistant drawbar for a frac pump fluid end according to claim 3, wherein: the part of the second shaft section (8) positioned in the elastic positioning ring (10) is provided with a conical surface (13) with the diameter gradually increasing towards the direction of the first shaft section (7), and the inner wall of the elastic positioning ring (10) is provided with an inner conical surface (14) matched with the conical surface (13).
5. An anti-slip tie rod for a frac pump fluid end as in claim 1 wherein: the axial limiting structure comprises a limiting ring groove (11) which is arranged on the peripheral wall of the pull rod (2) and extends annularly around the periphery of the pull rod, and a connecting ring (12) which is fixedly connected to the inner wall of the elastic positioning ring (10) and is clamped in the limiting ring groove (11).
6. An anti-slip tie rod for a frac pump fluid end as in claim 1 wherein: a gasket (15) is arranged between the screw cap (9) and the pump head body (1).
7. The trip-preventing pull rod for a fluid end of a frac pump of claim 6, wherein: the utility model discloses a pump head, including pump head body (1), packing ring (15), packing ring (9), packing ring (15) are close to the terminal surface of pump head body (1) is equipped with a plurality of first archs (16) of evenly arranging around its circumference, a plurality of around first recess (17) of evenly arranging around pull rod (2) circumference are seted up on pump head body (1) surface, first arch (16) one-to-one joint in first recess (17), packing ring (15) are close to the terminal surface of nut (9) is equipped with a plurality of second archs (18) of evenly arranging around its circumference, a plurality of second recesses (19) of evenly arranging around its circumference are seted up to nut (9) terminal surface, second arch (18) one-to-one joint in second recess (19).
8. The trip-preventing pull rod for a fluid end of a frac pump of claim 7, wherein: the first bulge (16) and the second bulge (18) are respectively arranged into hemispherical shapes, and the first groove (17) and the second groove (19) are respectively arranged into hemispherical shapes matched with the first bulge (16) and the second bulge (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321798081.5U CN220687559U (en) | 2023-07-10 | 2023-07-10 | Anti-drop pull rod for hydraulic end of fracturing pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321798081.5U CN220687559U (en) | 2023-07-10 | 2023-07-10 | Anti-drop pull rod for hydraulic end of fracturing pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220687559U true CN220687559U (en) | 2024-03-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321798081.5U Active CN220687559U (en) | 2023-07-10 | 2023-07-10 | Anti-drop pull rod for hydraulic end of fracturing pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220687559U (en) |
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2023
- 2023-07-10 CN CN202321798081.5U patent/CN220687559U/en active Active
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