Shackle device for packing pressing cap at fluid end of fracturing pump truck

Abstract

The utility model discloses a shackle device for a packing pressing cap at the fluid end of a fracturing pump truck, which relates to the technical field of fracturing pump trucks and comprises a connecting rod, a driving rod and a driving wheel, the driving wheel is sleeved on the driving rod, a mounting hole is arranged at the center of the connecting rod, the driving rod is inserted in the mounting hole, and the connecting rod is inserted in a central hole of the packing pressing cap. During disassembly, firstly, the connecting rod is inserted into a center hole of the packing pressing cap, and the connecting rod is connected with the packing pressing cap; the driving rod is inserted into the mounting hole of the connecting rod; finally, the driving wheel is arranged on the driving rod in a sleeving mode, the driving wheel is rotated, the driving wheel drives the connecting rod to rotate through the driving rod, the connecting rod drives the packing pressing cap to rotate synchronously, the packing pressing cap is disassembled, the packing pressing cap is evenly stressed in the disassembling process, scraps caused by long-term construction abrasion of the packing pressing cap are prevented from entering screw threads of the packing pressing cap, the disassembling process is smoother, and the disassembling efficiency is improved. The risk of fluid end damage in the dismounting process is reduced, and the construction quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fracturing pump trucks, in particular to a shackle device for a packing pressure cap at a hydraulic end of a fracturing pump truck. Background Art

[0002] Fracturing pump trucks are the main equipment in the process of oil exploration and development and oil and gas reservoir reconstruction. In operation, the power is transmitted from the engine through the hydraulic mechanical transmission box and the transmission shaft to the power end of the fracturing plunger pump. The power end drives the plunger of the hydraulic end to reciprocate through the connecting rod on the main shaft, converting the low-pressure sand mixing fluid into a high-pressure fluid that meets the construction requirements and injecting it into the well to carry out fracturing operations.

[0003] The hydraulic end of a fracturing pump truck is mainly composed of a pump head, suction and discharge valve assemblies, a plunger, packing, a valve and a valve seat, etc. The packing of the hydraulic end plays the role of sealing the gap between the plunger and the valve box. During operation, there is continuous high-speed sliding friction between the packing and the plunger. Due to long-term continuous operation, the packing is worn to a certain extent, and the components will become loose. The reciprocating motion will aggravate the wear and leakage of the packing. If it is not discovered and rectified in time, it will cause damage to the components. In severe cases, it will cause damage to the hydraulic end, causing the hydraulic end of the fracturing pump truck to fail to work normally, affecting the transformation of the oil and gas layer.

[0004] During the construction process, the damaged packing needs to be replaced to avoid serious damage to the hydraulic end or even scrapping. The traditional method of replacing the packing is to use a packing rod to remove the packing cap and replace the packing assembly. Sometimes the pressurized liquid carries the canvas and rubber debris of the packing into the packing cap thread, and the single point force makes it impossible to disassemble normally. If the buckle is forcibly removed, it is very easy to cause the thread to adhere and damage the hydraulic end body, affecting the construction quality. Utility Model Content

[0005] The utility model aims to provide a shackle device for a packing cap at a hydraulic end of a fracturing pump truck, which solves the technical problem that the unreasonable disassembly method of the packing cap affects the construction quality.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a shackle device for a packing cap of a hydraulic end of a fracturing pump truck, comprising:

[0007] A connecting rod is inserted into the central hole of the packing nut and is detachably connected to the packing nut;

[0008] A driving rod is inserted into the connecting rod, a rotation-stopping protrusion is formed on the outer side of the driving rod, a mounting hole is provided at the center of the connecting rod, and a rotation-stopping groove matching with the rotation-stopping protrusion is formed on the inner side of the mounting hole;

[0009] The driving wheel is sleeved on the driving rod and is used to drive the connecting rod to rotate synchronously through the driving rod.

[0010] Preferably, the side wall of the packing cap is provided with a plurality of penetrating connecting holes, the outer side surface of the connecting rod is provided with a plurality of fixing holes, and all the connecting holes and all the fixing holes are opposite to each other along the radial direction of the packing cap; and further comprising:

[0011] The positioning screws include a plurality of positioning screws, each of which passes through the connecting hole of the packing nut along the radial direction of the packing nut until being fixedly connected with the fixing hole of the connecting rod.

[0012] Preferably, all the positioning screws are evenly distributed in a radial shape.

[0013] Preferably, the length of the connecting rod is greater than the length of the packing pressing cap, and at least one end of the connecting rod is protruded outside the packing pressing cap.

[0014] Preferably, two ends of the connecting rod are protrudingly arranged outside the packing pressure cap, and a driving wheel is sleeved on each of the two ends of the connecting rod.

[0015] Preferably, a sleeve hole is provided at the center of the driving wheel, an anti-rotation groove is formed on the inner side surface of the sleeve hole, and the anti-rotation groove cooperates with the anti-rotation protrusion.

[0016] Preferably, the cross-section of the connecting rod, the cross-section of the mounting hole and the cross-section of the sleeve hole are all regular hexagons.

[0017] Preferably, a positioning protrusion is provided on the outer side surface of the connecting rod, and the positioning protrusion cooperates with the structural groove of the central hole to limit the radial movement of the connecting rod along the radial direction of the packing pressure cap.

[0018] Preferably, the outer side surface of the driving rod is stepped, and the driving rod comprises a rod body and a connecting flange integrally and coaxially arranged outside the rod body, the diameter of the connecting flange is larger than the diameter of the rod body, and the connecting flange is fixedly connected to the packing pressure cap.

[0019] Preferably, it also includes:

[0020] The auxiliary rod is detachably connected to the connecting rod and is used to feed the connecting rod into the packing nut.

[0021] Compared with the background technology, the utility model designs a shackle device for disassembling the packing cap of the hydraulic end of a fracturing pump truck. The shackle device includes a connecting rod, a driving rod and a driving wheel. The driving wheel is sleeved on the driving rod. A mounting hole is provided in the center of the connecting rod. The driving rod is inserted into the mounting hole. The connecting rod is inserted into the center hole of the packing cap.

[0022] When removing the packing nut, first insert the connecting rod into the center hole of the packing nut, and fix the connecting rod and the packing nut together; then insert the driving rod into the mounting hole of the connecting rod, and the anti-rotation protrusion on the outer side of the driving rod cooperates with the anti-rotation groove on the inner side of the mounting hole; finally, put the driving wheel on the driving rod, rotate the driving wheel, the driving wheel drives the driving rod to rotate, and the driving rod drives the connecting rod to rotate, so that the connecting rod drives the packing nut to rotate synchronously to remove the packing nut. In this way, the packing nut can be evenly stressed during disassembly, and the trivial debris caused by long-term construction wear of the packing nut can be prevented from entering the thread of the packing nut. The disassembly process is smoother, the risk of damaging the hydraulic end during disassembly is reduced, and the construction quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A longitudinal cross-sectional view of a shackle device for a hydraulic end packing cap of a fracturing pump truck provided by an embodiment of the utility model;

[0025] Figure 2 for Figure 1 Middle AA section view;

[0026] Figure 3 for Figure 1 Cross-sectional view of the center plate root cap;

[0027] Figure 4 for Figure 1 Schematic diagram of the cross section of the connecting rod.

[0028] The reference numerals are as follows:

[0029] Connecting rod 1, mounting hole 11, fixing hole 12, packing nut 2, center hole 21, connecting hole 22, driving rod 3, driving wheel 4 and positioning screw 5. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The utility model discloses a shackle device for a hydraulic end packing cap of a fracturing pump truck, as shown in the attached Figures 1 to 4 As shown, it includes a connecting rod 1, a driving rod 3 and a driving wheel 4. The connecting rod 1 is inserted into the center hole 21 of the packing nut 2. The packing nut 2 is cylindrical. Correspondingly, the outer side of the connecting rod 1 is cylindrical. The outer arc of the connecting rod 1 coincides with the inner arc of the center hole 21, and the length of the connecting rod 1 is greater than the length of the packing nut 2. The connecting rod 1 and the packing nut 2 are detachably connected, so that the connecting rod 1 can drive the packing nut 2 to rotate synchronously.

[0033] The driving rod 3 is inserted into the connecting rod 1. The center of the connecting rod 1 is milled to form a mounting hole 11. The driving rod 3 is coaxially inserted into the mounting hole 11. The driving rod 3 can slide relative to the connecting rod 1 along the axial direction of the packing nut 2. The cross-sectional shape of the driving rod 3 matches the cross-sectional shape of the mounting hole 11. In order to enable the driving rod 3 to drive the connecting rod 1 to rotate, a rotation-stopping protrusion is formed on the outer side of the driving rod 3, and a rotation-stopping groove is formed on the inner side of the mounting hole 11. The rotation-stopping protrusion cooperates with the rotation-stopping groove to limit the rotation of the driving rod 3 relative to the connecting rod 1, ensuring that the driving rod 3 can drive the connecting rod 1 to rotate synchronously. The cross-section of the connecting rod 1 and the cross-section of the mounting hole 11 are both regular hexagonal, that is, the connecting rod 1 is a regular hexagonal prism, and the mounting hole 11 is a regular hexagonal hole. The rotation-stopping protrusion is specifically a protrusion structure formed by the intersection of two adjacent side surfaces of the regular hexagonal prism, and the rotation-stopping groove is specifically a groove structure formed by the intersection of two adjacent side surfaces of the regular hexagonal hole. Of course, the cross-sectional shapes of the connecting rod 1 and the mounting hole 11 are not limited thereto, and may be, for example, a regular triangular prism or a regular quadrangular prism.

[0034] The driving wheel 4 is sleeved on the driving rod 3, and the driving wheel 4 can slide relative to the driving rod 3 along the axial direction of the packing cap 2, but a rotation-stopping structure is also provided between the driving wheel 4 and the driving rod 3, which is used to limit the rotation of the driving wheel 4 relative to the driving rod 3, so that the driving wheel 4 drives the driving rod 3 to rotate synchronously. A sleeve hole is provided at the center of the driving wheel 4, and the sleeve hole matches the outer side of the driving rod 3. An anti-rotation groove is formed on the inner side of the sleeve hole, and the anti-rotation groove matches the rotation-stopping protrusion to limit the relative rotation between the driving wheel 4 and the driving rod 3. Considering that the cross section of the connecting rod 1 and the cross section of the mounting hole 11 are both regular hexagons, the cross section of the sleeve hole is also regular hexagons, that is, the sleeve hole is also a regular hexagonal hole, and the anti-rotation groove is specifically a groove structure formed by the intersection of the adjacent two sides of the regular hexagonal hole. Of course, the structure of the sleeve hole is not limited to this, and can be adjusted according to the shape of the outer side of the driving rod 3. The driving wheel 4 can be specifically a hexagonal wrench, so that the driving wheel 4 applies torque to the packing cap 2 in a manually driven manner. One side of the driving wheel 4 is integrally and symmetrically provided with two handles for convenient hand-holding. Of course, the driving wheel 4 can also be electrically connected to a servo motor so that the driving wheel 4 applies torque to the packing pressing nut 2 in an electrically driven manner.

[0035] Before removing the packing nut 2, first release the pressure on the hydraulic end, then remove the gland, low-pressure plug, centralizer, centralizer block and spring in turn, and then after taking out the disassembled parts, remove the plunger slip and pull out the plunger, you are ready to remove the packing nut 2.

[0036] When removing the packing nut 2, first insert the connecting rod 1 into the center hole 21 of the packing nut 2, and fix the connecting rod 1 and the packing nut 2 together; then insert the driving rod 3 into the mounting hole 11 of the connecting rod 1, and the anti-rotation protrusion on the outer side of the driving rod 3 cooperates with the anti-rotation groove on the inner side of the mounting hole 11; finally, put the driving wheel 4 on the driving rod 3, rotate the driving wheel 4, the driving wheel 4 drives the driving rod 3 to rotate, and the driving rod 3 drives the connecting rod 1 to rotate, so that the connecting rod 1 drives the packing nut 2 to rotate synchronously to remove the packing nut 2. In this way, the packing nut 2 can be evenly stressed during disassembly, and the trivial debris caused by long-term construction wear of the packing nut 2 can be prevented from entering the thread of the packing nut 2, the disassembly process is smoother, the risk of damaging the hydraulic end during disassembly is reduced, and the construction quality is improved.

[0037] The above-mentioned shackle device also includes a plurality of positioning screws 5 for connecting the packing nut 2 and the connecting rod 1. The side wall of the packing nut 2 forms a plurality of through connection holes 22, and correspondingly, the outer side of the connecting rod 1 is provided with a plurality of fixing holes 12, all of which are opposite to each other along the radial direction of the packing nut 2. Each positioning screw 5 passes through the connection hole 22 of the packing nut 2 along the radial direction of the packing nut 2 until it is fixedly connected with the fixing hole 12 of the connecting rod 1, ensuring that the packing nut 2 and the connecting rod 1 are reliably connected. All positioning screws 5 are evenly distributed in a radial shape to ensure that the packing nut 2 is evenly stressed during the disassembly process.

[0038] The length of the connecting rod 1 is greater than the length of the packing nut 2, and at least one end of the connecting rod 1 is protruded outside the packing nut 2, so that the end of the connecting rod 1 leaves space for installing the driving wheel 4. Both ends of the connecting rod 1 are protruded outside the packing nut 2, and a driving wheel 4 is sleeved on each end of the connecting rod 1, so that the driving rod 3 can balance the force and ensure that the packing nut 2 is smoothly unloaded from the hydraulic end.

[0039] A positioning protrusion is provided on the outer side of the connecting rod 1, and a structural groove is formed on the inner side of the central hole 21 of the packing nut 2. The positioning protrusion cooperates with the structural groove to limit the radial movement of the connecting rod 1 along the radial direction of the packing nut 2, ensuring the safe and reliable use of the shackle device. The structural groove does not need to be milled separately, and can be a part of the packing nut 2 itself, for example, the structural groove can be an annular groove for installing a sealing ring.

[0040] The outer side surface of the driving rod 3 is stepped. The driving rod 3 includes a rod body and a connecting flange coaxially arranged outside the rod body. The diameter of the connecting flange is larger than the diameter of the rod body. The connecting flange is fixedly connected to the packing cap 2. In this way, the weight of the driving rod 3 can be reduced while ensuring a reliable connection between the driving rod 3 and the packing cap 2.

[0041] The above-mentioned unfastening device also includes an auxiliary rod, which is detachably connected to the connecting rod 1. The two can be specifically threadedly connected. The auxiliary rod is used to send the connecting rod 1 into the packing nut 2 to ensure that all the connecting holes 22 of the packing nut 2 and all the fixing holes 12 of the connecting rod 1 are opposite to each other along the radial direction of the packing nut 2. After the packing nut 2 and the connecting rod 1 are fixedly connected together, the auxiliary rod is removed and the driving rod 3 is inserted into the connecting rod 1.

[0042] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A shackle device for the hydraulic end packing cap of a fracturing pump truck, characterized in that: include: A connecting rod (1) is inserted into a central hole (21) of a packing nut (2) and is detachably fixedly connected to the packing nut (2); A driving rod (3) is inserted into the connecting rod (1), a rotation-stopping protrusion is formed on the outer side surface of the driving rod (3), a mounting hole (11) is provided at the center of the connecting rod (1), and a rotation-stopping groove matching with the rotation-stopping protrusion is formed on the inner side surface of the mounting hole (11); A driving wheel (4) is sleeved on the driving rod (3) and is used to drive the connecting rod (1) to rotate synchronously via the driving rod (3).

2. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to claim 1 is characterized in that: The side wall of the packing nut (2) is provided with a plurality of penetrating connecting holes (22), the outer side surface of the connecting rod (1) is provided with a plurality of fixing holes (12), and all the connecting holes (22) and all the fixing holes (12) are opposite to each other along the radial direction of the packing nut (2); and further comprising: The positioning screws (5) include a plurality of positioning screws, each of which passes through a connecting hole (22) of the packing nut (2) along the radial direction of the packing nut (2) until being fixedly connected to a fixing hole (12) of the connecting rod (1).

3. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to claim 2 is characterized in that: All the positioning screws (5) are evenly distributed in a radial shape.

4. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to claim 1, characterized in that: The length of the connecting rod (1) is greater than the length of the packing pressing cap (2), and at least one end of the connecting rod (1) is protruding outside the packing pressing cap (2).

5. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to claim 4 is characterized in that: The two ends of the connecting rod (1) are protruding outside the packing pressure cap (2), and a driving wheel (4) is sleeved on each of the two ends of the connecting rod (1).

6. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to any one of claims 1 to 5, characterized in that: A sleeve hole is provided at the center of the driving wheel (4), an anti-rotation groove is formed on the inner side surface of the sleeve hole, and the anti-rotation groove cooperates with the anti-rotation protrusion.

7. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to claim 6, characterized in that: The cross section of the connecting rod (1), the cross section of the mounting hole (11) and the cross section of the sleeve hole are all regular hexagons.

8. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to any one of claims 1 to 5, characterized in that: The outer side surface of the connecting rod (1) is provided with a positioning protrusion, and the positioning protrusion cooperates with the structural groove of the central hole (21) to limit the radial movement of the connecting rod (1) along the radial direction of the packing nut (2).

9. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to any one of claims 1 to 5, characterized in that: The outer side surface of the driving rod (3) is stepped. The driving rod (3) comprises a rod body and a connecting flange integrally and coaxially arranged outside the rod body. The diameter of the connecting flange is larger than the diameter of the rod body. The connecting flange is fixedly connected to the packing pressure cap (2).

10. The shackle device for the hydraulic end packing cap of a fracturing pump truck according to any one of claims 1 to 5, characterized in that: Also includes: An auxiliary rod is detachably connected to the connecting rod (1) and is used to feed the connecting rod (1) into the packing nut (2).

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