Fluid end structure of fracturing pump

Abstract

The utility model relates to the technical field of fracturing pumps, in particular to a fluid end structure of a fracturing pump. Comprising a fluid end valve box, a lining, a discharge valve assembly, a suction valve assembly and a plunger, the fluid end valve box is provided with a vertically-arranged suction cavity channel and a horizontally-arranged discharge cavity channel, three channel openings are formed between the suction cavity channel and the discharge cavity channel, the suction valve assembly is fixedly connected with the fluid end valve box, and the plunger is fixedly connected with the lining. The discharge valve assembly and the lining are arranged in the discharge cavity channel, the vertically-arranged suction cavity channel and the horizontally-arranged discharge cavity channel are adopted, one end of the suction cavity channel is communicated with the middle end of the discharge cavity channel, the suction cavity channel and the discharge cavity channel form a T-shaped intersection, three channel openings are formed, the number of intersecting lines is reduced, and the number of the intersecting lines is reduced. The stress concentration condition of the fluid end valve box can be obviously improved, the service life of the fluid end is prolonged, the failure probability of the fluid end valve box caused by stress concentration is reduced, and the boundary dimension and weight of the fluid end valve box can be effectively reduced; and the effects of small processing amount and simpler processing technology are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fracturing pumps, in particular to a hydraulic end structure of a fracturing pump. Background Art

[0002] In the process of oil and gas exploitation, the fracturing pump is one of the indispensable equipment. As the core component of the fracturing pump, the performance of the hydraulic end directly affects the overall working efficiency and reliability of the fracturing pump.

[0003] The internal cavity of the existing hydraulic end valve box is usually in a cross shape, with a total of four channel openings, and two intersection lines are formed at the intersection. The internal structure is relatively complex and the processing amount is large, resulting in a complex processing technology. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hydraulic end structure of a fracturing pump, which solves the problems that the internal cavity of the existing hydraulic end valve box is usually in a cross shape, with a total of four channel openings, the internal structure is relatively complex, the processing amount is large, and the processing technology is complex.

[0005] To achieve the above purpose, a hydraulic end structure of a fracturing pump adopted by the utility model includes a hydraulic end valve box, a bushing, a discharge valve assembly, a suction valve assembly and a plunger. The hydraulic end valve box has a vertically arranged suction cavity and a horizontally arranged discharge cavity, and one end of the suction cavity is communicated with the middle end of the discharge cavity. Three channel openings are formed between the suction cavity and the discharge cavity. The suction valve assembly is fixedly connected with the hydraulic end valve box and is located in the suction cavity. The discharge valve assembly and the bushing are respectively arranged in the discharge cavity of the hydraulic end valve box. The plunger is slidably connected with the hydraulic end valve box and is located at the discharge cavity.

[0006] By adopting the vertically arranged suction cavity and the horizontally arranged discharge cavity, with one end of the suction cavity communicated with the middle end of the discharge cavity, the two form a T-shaped intersection, forming three channel openings, which can effectively reduce the external dimension and weight of the hydraulic end valve box; and obtain the effects of less processing amount and simpler processing technology.

[0007] Wherein, the discharge valve assembly has a discharge channel.

[0008] The discharge channel is provided in the discharge valve assembly.

[0009] Wherein, the hydraulic end structure of the fracturing pump further includes a discharge valve end cover assembly, and the discharge valve end cover assembly is fixedly connected with the discharge valve assembly and is located in the discharge cavity.

[0010] The discharge valve end cover assembly realizes the sealing performance.

[0011] Among them, the hydraulic end structure of the fracturing pump further includes an end cover seal, which is fixedly connected to the discharge valve end cover assembly and fitted inside the discharge valve end cover assembly.

[0012] The end cover seal cooperates with the discharge valve end cover assembly to improve the sealing effect.

[0013] Among them, the hydraulic end structure of the fracturing pump further includes a packing seal, which is fixedly connected to the hydraulic end valve box and located on the outer side wall of the plunger.

[0014] The packing seal is used to improve the sealing effect between the plunger and the hydraulic end valve box.

[0015] In the hydraulic end structure of a fracturing pump of the present utility model, the vertically arranged suction chamber and the horizontally arranged discharge chamber are adopted. The suction valve assembly is located in the vertical suction chamber to open or close the suction chamber. One end of the suction chamber is connected to the middle end of the discharge chamber, and the two form a T-shaped intersection, forming three channel openings. A common intersection line is formed at the intersection position. Compared with the traditional two, it can improve the stress concentration of the hydraulic end valve box, extend the life of the hydraulic end, and reduce the probability of the hydraulic end valve box failing due to stress concentration; adopting the above structure, reducing the number of intersection lines can significantly improve the stress concentration of the hydraulic end valve box, extend the life of the hydraulic end, and reduce the probability of the hydraulic end valve box failing due to stress concentration. It can effectively reduce the external dimensions and weight of the hydraulic end valve box; and achieve the effects of less processing amount and simpler processing technology. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a structural cross-sectional view of the hydraulic end structure of the fracturing pump of the present utility model.

[0018] 10 - Hydraulic end valve box, 11 - Suction chamber, 12 - Discharge chamber, 20 - Bushing, 30 - Discharge valve assembly, 31 - Discharge channel, 40 - Discharge valve end cover assembly, 50 - Suction valve assembly, 60 - Plunger, 70 - End cover seal, 80 - Packing seal, 90 - Intersection line. Detailed Embodiments

[0019] Please refer to Figure 1 , in which Figure 1It is a structural sectional view of the hydraulic end structure of a fracturing pump.

[0020] The utility model provides a hydraulic end structure of a fracturing pump, which includes a hydraulic end valve box 10, a bushing 20, a discharge valve assembly 30, a suction valve assembly 50 and a plunger 60. The hydraulic end valve box 10 has a vertically arranged suction channel 11 and a horizontally arranged discharge channel 12, and one end of the suction channel 11 is communicated with the middle end of the discharge channel 12. Three channel openings are formed between the suction channel 11 and the discharge channel 12. The suction valve assembly 50 is fixedly connected to the hydraulic end valve box 10 and is located in the suction channel 11. The discharge valve assembly 30 and the bushing 20 are respectively arranged in the discharge channel 12 of the hydraulic end valve box 10. The plunger 60 is slidably connected to the hydraulic end valve box 10 and is located at the discharge channel 12.

[0021] In this embodiment, the vertically arranged suction channel 11 and the horizontally arranged discharge channel 12 are adopted. The suction valve assembly 50 is located in the vertical suction channel 11 to open or close the suction channel 11. One end of the suction channel 11 is communicated with the middle end of the discharge channel 12, and the two form a T-shaped intersection, forming three channel openings. A total of one intersection line 90 is formed at the intersection position, and only one intersection line 90 is formed. Compared with the traditional two intersection lines, it can improve the stress concentration situation of the hydraulic end valve box 10, extend the life of the hydraulic end, and reduce the probability of the hydraulic end valve box 10 failing due to stress concentration; adopting the above structure, reducing the number of intersection lines can significantly improve the stress concentration situation of the hydraulic end valve box 10, extend the life of the hydraulic end, reduce the probability of the hydraulic end valve box 10 failing due to stress concentration, and can effectively reduce the external dimension and weight of the hydraulic end valve box 10; obtaining the effects of less processing amount and simpler processing technology.

[0022] Further, the discharge valve assembly 30 has a discharge channel 31, and the discharge channel 31 is communicated with the discharge channel 12.

[0023] In this embodiment, the discharge channel 31 is provided in the discharge valve assembly 30, and the discharge channel 31 runs through the discharge channel 12.

[0024] Further, the hydraulic end structure of the fracturing pump further includes a discharge valve end cover assembly 40. The discharge valve end cover assembly 40 is fixedly connected to the discharge valve assembly 30 and is located in the discharge channel 12.

[0025] In this embodiment, the discharge valve end cover assembly 40 realizes the sealing performance.

[0026] Further, the hydraulic end structure of the fracturing pump further includes an end cover seal 70, which is fixedly connected to the discharge valve end cover assembly 40 and is fitted inside the discharge valve end cover assembly 40.

[0027] In this embodiment, the end cover seal 70 cooperates with the discharge valve end cover assembly 40 to improve the sealing effect.

[0028] Further, the hydraulic end structure of the fracturing pump further includes a packing seal 80, which is fixedly connected to the hydraulic end valve box 10 and is located on the outer side wall of the plunger 60.

[0029] In this embodiment, the packing seal 80 is used to improve the sealing effect between the plunger 60 and the hydraulic end valve box 10.

[0030] The above-disclosed is only a preferred embodiment of the present utility model. Of course, it cannot be used to limit the scope of the rights of the present utility model. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present utility model still fall within the scope covered by the utility model.

Claims

1. A hydraulic end structure of a fracturing pump, characterized in that it includes a hydraulic end valve box, a bushing, a discharge valve assembly, a suction valve assembly and a plunger. The hydraulic end valve box has a vertically arranged suction channel and a horizontally arranged discharge channel, and one end of the suction channel is communicated with the middle end of the discharge channel. Three channel openings are formed between the suction channel and the discharge channel. The suction valve assembly is fixedly connected to the hydraulic end valve box and is located in the suction channel. The discharge valve assembly and the bushing are respectively arranged in the discharge channel of the hydraulic end valve box. The plunger is slidably connected to the hydraulic end valve box and is located at the discharge channel.

2. The hydraulic end structure of a fracturing pump according to claim 1, characterized in that the discharge valve assembly has a discharge channel.

3. The hydraulic end structure of a fracturing pump according to claim 1, characterized in that the hydraulic end structure of the fracturing pump further includes a discharge valve end cover assembly, and the discharge valve end cover assembly is fixedly connected to the discharge valve assembly and is located in the discharge channel.

4. The hydraulic end structure of a fracturing pump according to claim 3, characterized in that the hydraulic end structure of the fracturing pump further includes an end cover seal, and the end cover seal is fixedly connected to the discharge valve end cover assembly and is fitted inside the discharge valve end cover assembly.

5. The hydraulic end structure of a fracturing pump according to claim 1, characterized in that the hydraulic end structure of the fracturing pump further includes a packing seal, and the packing seal is fixedly connected to the hydraulic end valve box and is located on the outer side wall of the plunger.

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