Novel plunger pump shell with anti-stress structure

Abstract

The utility model discloses a novel plunger pump shell with an anti-stress structure, which belongs to the technical field of plunger pumps and comprises a plunger pump shell, the plunger pump shell is composed of vertical plates oppositely arranged on two sides, and a plurality of middle vertical plates are arranged between the plunger pump shell at equal intervals. Upper arc plates are welded between the adjacent middle vertical plates and between the plunger pump shells and the middle vertical plates, rear cover plates are welded to one ends of the upper arc plates, the rear cover plates are welded to the plunger pump shells and the middle vertical plates, rear supporting plates are welded between the plunger pump shells, and the rear supporting plates are welded to the middle vertical plates and the rear cover plates. According to the utility model, the structure of the shell is changed through design, fatigue cracks of a welding seam caused by large stress of the welding seam are avoided, the stress structure of the welding seam is mainly adjusted, single stress of the welding seam is reduced, the stress area of the welding seam is increased, the stress at the welding seam can be reduced, and fatigue cracks are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a novel anti-stress structure plunger pump housing. Background Art

[0002] During the oil and gas development process, a fracturing truck is needed for fracturing operations. The fracturing operation is to make the liquid generate high pressure through the plunger pump on the fracturing truck, inject it into the formation to break open the formation, and achieve the process of oil and gas extraction. The fracturing pump is a key component in the whole fracturing process. The fracturing truck mainly consists of an engine, a gearbox, and a plunger pump. The output of the engine is connected to the input of the gearbox, and the output of the gearbox is connected to the input of the plunger pump. The engine provides power for the plunger pump, and the gearbox provides different speeds for the plunger pump through gear shifting, so that the plunger pump can output different displacements and pressures. Therefore, the plunger pump is the most stressed and has the harshest working conditions during the whole fracturing process, which will also cause damage to various components of the plunger pump, such as fatigue cracks in the power end housing, crankshaft fracture, etc.;

[0003] With the increasing operation pressure during the oil and gas development process, the existing conventional plunger pump housing can no longer meet the use requirements, and the failure rate will be higher and higher in the later use, resulting in abnormal operation. The main reason is that when the plunger pump was designed in the early stage, it was designed according to the intermittent working condition and did not consider the continuous working condition in the later stage. Therefore, the housing is relatively weak. As the pressure increases during the fracturing operation, the force on the housing of the plunger pump becomes greater and greater, which will cause the housing to deform and lead to bolt fracture. Due to the housing structure design problem, related problems such as housing cracks will follow one after another. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems in the existing technology, and a novel anti-stress structure plunger pump housing is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A novel anti-stress structure plunger pump housing, including a plunger pump housing, the plunger pump housing is composed of two relatively arranged vertical plates on both sides, a plurality of intermediate vertical plates are equidistantly arranged between the plunger pump housings, upper arc plates are welded between adjacent intermediate vertical plates and between the plunger pump housing and the intermediate vertical plates, one end of the upper arc plate is welded with a rear cover plate, the rear cover plate is welded with the plunger pump housing and the intermediate vertical plates, a rear support plate is welded between the plunger pump housings, and the rear support plate is welded with the intermediate vertical plates and the rear cover plate.

[0007] Preferably, first bases for supporting are welded at the bottom near both sides of the rear support plate.

[0008] Preferably, one end of the plunger pump housing, the upper arc plate and the middle vertical plate are jointly welded with a front end plate.

[0009] Preferably, a plurality of front support plates are jointly welded and arranged at one end of the plunger pump housing and the middle vertical plate, and openings are formed in the side walls of the front support plates.

[0010] Preferably, second bases for support are welded and arranged at the bottom ends of the two side front support plates.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. In this solution, by designing and changing the structure of the housing, the stress on the weld is avoided from being too large, which may cause weld fatigue cracks. The stress structure of the weld is mainly adjusted to reduce the single stress on the weld and increase the stress area of the weld, so as to reduce the stress at the weld and avoid the occurrence of fatigue cracks.

[0013] 2. In this solution, when the plunger pump housing works, it is fixed by the first base and the second base. The plunger pump housing and the middle vertical plate are fixedly welded together with the first base and the second base through the rear support plate and the front support plate, which can improve the stiffness of the entire plunger pump housing, prevent the plunger pump housing from twisting and deforming when stressed, reduce the stress of the plunger pump housing, extend the time when fatigue cracks appear, and avoid damage to other parts of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic three-dimensional structure diagram of a novel anti-stress structure plunger pump housing proposed by the present utility model Figure 1 ;

[0015] Figure 2 is a schematic three-dimensional structure diagram of a novel anti-stress structure plunger pump housing proposed by the present utility model Figure 2 ;

[0016] Figure 3 is a schematic side structure diagram of a novel anti-stress structure plunger pump housing proposed by the present utility model;

[0017] Figure 4 is a schematic front view structure diagram of a novel anti-stress structure plunger pump housing proposed by the present utility model;

[0018] Figure 5 is a schematic rear view structure diagram of a novel anti-stress structure plunger pump housing proposed by the present utility model.

[0019] In the figure: 1. Plunger pump housing; 2. Upper arc plate; 3. Middle vertical plate; 4. Rear cover plate; 5. Rear support plate; 6. First base; 7. Front end plate; 8. Front support plate; 9. Second base; 10. Opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Referring to Figures 1-5 , a novel anti-stress structure plunger pump housing includes a plunger pump housing 1, which is composed of two oppositely arranged vertical plates on both sides. A plurality of intermediate vertical plates 3 are equidistantly arranged between the plunger pump housings 1. Upper arc plates 2 are welded between adjacent intermediate vertical plates 3 and between the plunger pump housing 1 and the intermediate vertical plates 3. One end of the upper arc plate 2 is welded with a rear cover plate 4, and the rear cover plate 4 is welded to the plunger pump housing 1 and the intermediate vertical plates 3. A rear support plate 5 is welded between the plunger pump housings 1, and the rear support plate 5 is welded to the intermediate vertical plates 3 and the rear cover plate 4.

[0022] It should be noted that: by designing and changing the structure of the housing, the stress on the weld is avoided from being too large, which may cause fatigue cracks in the weld. The stress structure of the weld is mainly adjusted, the single stress on the weld is reduced, and the stress area of the weld is increased, which can reduce the stress at the weld and avoid the occurrence of fatigue cracks.

[0023] It is worth noting that: referring to Figure 3 , when the plunger pump is working, the thrust generated is F. When designing the weld, the weld is integrally welded along the stress direction, so that the weld is stressed as a whole, rather than a single point weld being stressed, which can avoid the weld from tearing or having fatigue cracks.

[0024] At the bottom end of the rear support plate 5 near both sides, a first base 6 for support is welded. One end of the plunger pump housing 1, the upper arc plate 2 and the intermediate vertical plate 3 are jointly welded with a front end plate 7. One end of the plunger pump housing 1 and the intermediate vertical plate 3 are jointly welded with a plurality of front support plates 8. An opening 10 is provided on the side wall of the front support plate 8, and a second base 9 for support is welded at the bottom end of both front support plates 8.

[0025] It should be noted that: when the plunger pump housing 1 is working, it is fixed by using the first base 6 and the second base 9. Under the action of the welding of the front support plates 8 and the rear support plate 5 with the intermediate vertical plates 3, the first base 6 and the second base 9, the overall strength of the plunger pump housing 1 can be significantly increased, preventing the plunger pump housing 1 from being torsionally deformed when stressed, reducing the stress of the plunger pump housing 1, and prolonging the time for fatigue cracks to appear, avoiding damage to other components of the plunger pump.

[0026] When the utility model is in use, according to the thrust direction generated by the plunger pump during operation, the structure of the housing is designed and changed, and the stress structure of the weld is adjusted, so that the weld is integrally welded along the stress direction, enabling the weld to bear the overall stress instead of a single point weld, thus avoiding weld tearing or the appearance of fatigue cracks;

[0027] In addition, when the plunger pump housing is in operation, it is fixed by the first base 6 and the second base 9. Under the action of welding the front support plate 8 and the rear support plate 5 to the middle vertical plate 3, the first base 6 and the second base 9, the overall strength of the plunger pump housing 1 can be significantly increased, preventing the plunger pump housing 1 from being torsionally deformed when stressed, reducing the stress of the plunger pump housing 1, and prolonging the time when fatigue cracks appear, thereby avoiding damage to other components of the plunger pump.

[0028] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its inventive concept, making equivalent substitutions or changes, should be covered by the protection scope of the utility model.

Claims

1. A novel anti-stress structure plunger pump housing, comprising a plunger pump housing (1), characterized in that: The plunger pump housing (1) is composed of vertical plates arranged opposite to each other on both sides, a plurality of intermediate vertical plates (3) are arranged equidistantly between the plunger pump housings (1), an upper arc plate (2) is welded between adjacent intermediate vertical plates (3) and between the plunger pump housing (1) and the intermediate vertical plates (3), a rear cover plate (4) is welded to one end of the upper arc plate (2), the rear cover plate (4) is welded to the plunger pump housing (1) and the intermediate vertical plates (3), a rear support plate (5) is welded between the plunger pump housings (1), and the rear support plate (5) is welded to the intermediate vertical plates (3) and the rear cover plate (4).

2. A novel anti-stress structure plunger pump housing according to claim 1, characterized in that: A first base (6) having a supporting function is welded to the bottom end of the rear support plate (5) near both sides.

3. A novel anti-stress structure plunger pump housing according to claim 1, characterized in that: The plunger pump housing (1), the upper arc plate (2) and one end of the middle vertical plate (3) are welded together with a front end plate (7).

4. A novel anti-stress structure plunger pump housing according to claim 1, characterized in that: The plunger pump housing (1) and one end of the middle vertical plate (3) are welded together to form a plurality of front support plates (8), and the side wall of the front support plate (8) is provided with an opening (10).

5. A novel anti-stress structure plunger pump housing according to claim 4, characterized in that: A second base (9) for supporting is welded to the bottom ends of the front support plates (8) on both sides.

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