A new type of hydraulic end assembly structure

Abstract

A novel hydraulic end assembly structure relates to the technical field of oilfield fracturing equipment, including a pump head body, wherein a plurality of horizontal cavities are arranged in parallel in the pump head body, and each of the horizontal cavities is cross-intersected with two vertical cavities; a plunger is arranged in the horizontal cavity, and an upper valve seat assembly is arranged in the upper end cavity of the vertical cavity, and an upper valve body assembly is arranged in the upper valve seat assembly, and a spring is installed on the upper valve body assembly, and the other end of the spring is installed on the discharge gland; a lower valve seat assembly is arranged in the lower end cavity of the vertical cavity, and a lower valve body assembly is arranged in the lower valve seat assembly, and a spring is installed on the lower valve body assembly, and the other end of the spring is installed on the spring guide seat. The utility model provides two vertical cavities cross-intersecting with each horizontal cavity in the pump head body, and when the plunger moves back and forth, the two vertical cavities respectively inhale and discharge fracturing fluid, so that the equipment is subjected to stable force, has small vibration, and reduces the failure rate of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field fracturing equipment, in particular to a novel hydraulic end assembly structure. Background Art

[0002] In the development of oil and gas fields, fracturing technology is widely used in production increase construction. The most important equipment in fracturing construction is the fracturing pump. The fracturing pump consists of two parts: the power end and the hydraulic end. The power end converts the energy of the diesel engine or motor into kinetic energy and transmits it to the hydraulic end through the plunger. The main component of the hydraulic end is the pump head body.

[0003] At present, the single-acting fracturing pumps on the market only discharge high-pressure fracturing medium when the plunger moves forward, and only inhale fracturing medium when it moves backward. Relatively speaking, the single-acting fracturing pump has a small displacement, the crankshaft in the power end assembly is subject to intermittent impact, and the equipment vibrates greatly. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a new hydraulic end assembly structure that can solve the above technical problems.

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

[0006] A novel hydraulic end assembly structure comprises a pump head body, wherein a plurality of horizontal cavities are arranged in parallel in the pump head body, and each of the horizontal cavities has two vertical cavities intersecting each other in a cross manner; a plunger is arranged in the horizontal cavity, and an upper valve seat assembly is arranged in the upper end cavity of the vertical cavity, and an upper valve body assembly is arranged in the upper valve seat assembly, and a spring is installed on the upper valve body assembly, and an end of the spring away from the upper valve body assembly is installed on a discharge gland, and the discharge gland is tightened by a locking nut, and the locking nut is fixedly connected to the upper end of the vertical cavity; a lower valve seat assembly is arranged in the lower end cavity of the vertical cavity, and a lower valve body assembly is arranged in the lower valve seat assembly, and a spring is installed on the lower valve body assembly, and an end of the spring away from the lower valve body assembly is installed on a spring guide seat.

[0007] Preferably, an end seal is provided between the front section of the plunger and the horizontal cavity, and a lubricating oil channel is provided on the end seal; a sealing assembly is provided between the rear section of the plunger and the horizontal cavity, spring brackets are provided on both sides of the sealing assembly, and the spring guide seat is embedded in the spring bracket; a suction pressure cover is provided at the rear end of the rear section of the plunger, and the suction pressure cover is tightened by a locking nut, and the locking nut is fixedly connected to the rear end of the horizontal cavity.

[0008] Preferably, the sealing assembly includes a packing pressure ring, a lubricating oil through hole is provided in the packing pressure ring, the lubricating oil through hole is connected to the lubricating oil hole on the pump head body, and packing assemblies are provided on both sides of the packing pressure ring, wherein a packing washer is provided at the front end of the left packing assembly, and a packing spacer ring is provided at the rear end of the right packing assembly.

[0009] Preferably, chamfers are provided at the cross-intersecting joints between the horizontal cavity and the two vertical cavities.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model provides two vertical cavities cross-intersecting each horizontal cavity in the pump head body. When the plunger moves forward and backward, the two vertical cavities respectively inhale and discharge the fracturing fluid, so that the equipment is subjected to stable force, has small vibration, and reduces the failure rate of the equipment.

[0012] 2. The utility model provides a lubricating oil through hole and a lubricating oil channel. When the plunger moves forward and backward, the added lubricating oil will reach the plunger surface, thereby reducing friction, taking away heat, and reducing the loss of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 This is a schematic diagram of the pump head structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the sealing component structure of the utility model.

[0018] Description of reference numerals:

[0019] 1- pump head body, 2- horizontal cavity, 3- vertical cavity, 4- plunger, 5- upper valve seat assembly, 6- upper valve body assembly, 7- spring, 8- discharge gland, 9- locking nut, 10- lower valve seat assembly, 11- lower valve body assembly, 12- spring guide seat, 13- end seal, 14- lubricating oil channel, 15- sealing assembly, 151- packing pressure ring, 152- lubricating oil through hole, 153- packing assembly, 154- packing gasket, 155- packing spacer ring, 16- spring bracket, 17- suction gland, 18- lubricating oil hole. DETAILED DESCRIPTION

[0020] The following is a detailed description of the invention of the utility model by way of examples in conjunction with the accompanying drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Example

[0021] like Figures 1 to 4 As shown, the utility model discloses a novel hydraulic end assembly structure, including a pump head body 1, wherein five horizontal cavities 2 are arranged in parallel in the pump head body 1, and two vertical cavities 3 are cross-intersected on each of the horizontal cavities 2, and large arc chamfers are provided at the cross-intersecting connections between the horizontal cavity 2 and the two vertical cavities 3; by providing two vertical cavities 3 cross-intersecting with each horizontal cavity 2 in the pump head body 1, when the plunger 4 moves back and forth, the two vertical cavities 3 respectively inhale and discharge fracturing fluid, so that the equipment is subjected to stable force, small vibration, and the failure rate of the equipment is reduced.

[0022] Furthermore, in the present embodiment, a plunger 4 is provided in the horizontal cavity 2, an end seal 13 is provided between the front section of the plunger 4 and the horizontal cavity 2, and a lubricating oil channel 14 is provided on the end seal 13; a sealing assembly 15 is provided between the rear section of the plunger 4 and the horizontal cavity 2, and spring brackets 16 are provided on both sides of the sealing assembly 15; a suction pressure cover 17 is provided at the rear end of the rear section of the plunger 4, and the suction pressure cover 17 is tightened by a locking nut 9, and the locking nut 9 is fixedly connected to the rear end of the horizontal cavity 2.

[0023] Furthermore, in the present embodiment, the sealing assembly 15 includes a packing pressure ring 151, in which a lubricating oil through hole 152 is provided, and the lubricating oil through hole 152 is connected to the lubricating oil hole 18 on the pump head body 1. By providing the lubricating oil through hole 152 and the lubricating oil channel 14, when the plunger 4 moves forward and backward, the added lubricating oil will reach the surface of the plunger 4, thereby reducing friction and taking away heat, thereby reducing the loss of the seal; packing assemblies 153 are provided on both sides of the packing pressure ring 151, wherein a packing gasket 154 is provided at the front end of the left packing assembly 153, and a packing spacer ring 155 is provided at the rear end of the right packing assembly 153.

[0024] Furthermore, in the present embodiment, an upper valve seat assembly 5 is provided in the upper end cavity of the vertical cavity 3, an upper valve body assembly 6 is provided in the upper valve seat assembly 5, a spring 7 is installed on the upper valve body assembly 6, one end of the spring 7 away from the upper valve body assembly 6 is installed on a discharge gland 8, the discharge gland 8 is tightened by a locking nut 9, and the locking nut 9 is fixedly connected to the upper end of the vertical cavity 3; a lower valve seat assembly 10 is provided in the lower end cavity of the vertical cavity 3, a lower valve body assembly 11 is provided in the lower valve seat assembly 10, a spring 7 is installed on the lower valve body assembly 11, one end of the spring 7 away from the lower valve body assembly 11 is installed on a spring guide seat 12, and the spring guide seat 12 is embedded in a spring bracket 16.

[0025] Working principle: when the power end of the fracturing pump drives the plunger 4 to move to the right, the upper spring 7 in the right vertical cavity 3 is compressed, the upper valve body assembly 6 moves up to open the channel, discharges the fracturing fluid, the lower spring 7 extends, and the lower valve body assembly 11 moves down to close the channel; the upper spring 7 in the left vertical cavity 3 extends, the upper valve body assembly 6 closes the channel, the lower spring 7 is compressed, the lower valve body assembly 11 moves up to open the channel, and sucks in the fracturing fluid.

[0026] When the power end of the fracturing pump drives the plunger 4 to move to the left, the upper spring 7 in the right vertical cavity 3 stretches, the upper valve body assembly 6 closes the channel, the lower spring 7 is compressed, the lower valve body assembly 11 moves up to open the channel, and the fracturing fluid is sucked in; the upper spring 7 in the left vertical cavity 3 is compressed, the upper valve body assembly 6 moves up to open the channel, and the fracturing fluid is discharged, the lower spring 7 stretches, and the lower valve body assembly 11 moves down to close the channel.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and application concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel hydraulic end assembly structure, comprising a pump head body (1), characterized in that: The pump head body (1) is provided with a plurality of horizontal cavities (2) arranged in parallel, and each of the horizontal cavities (2) is provided with two vertical cavities (3) intersecting each other in a cross pattern; a plunger (4) is provided in the horizontal cavity (2), an upper valve seat assembly (5) is provided in the upper cavity of the vertical cavity (3), an upper valve body assembly (6) is provided in the upper valve seat assembly (5), a spring (7) is installed on the upper valve body assembly (6), and one end of the spring (7) away from the upper valve body assembly (6) is installed on the discharge On the discharge pressure cover (8), the discharge pressure cover (8) is tightened by a locking nut (9), and the locking nut (9) is fixedly connected to the upper end of the vertical chamber (3); a lower valve seat assembly (10) is provided in the lower end cavity of the vertical chamber (3), and a lower valve body assembly (11) is provided in the lower valve seat assembly (10), and a spring (7) is installed on the lower valve body assembly (11), and one end of the spring (7) away from the lower valve body assembly (11) is installed on the spring guide seat (12).

2. A novel hydraulic end assembly structure as claimed in claim 1, characterized in that: An end seal (13) is provided between the front section of the plunger (4) and the horizontal cavity (2), and a lubricating oil passage (14) is provided on the end seal (13); a sealing assembly (15) is provided between the rear section of the plunger (4) and the horizontal cavity (2), and spring brackets (16) are provided on both sides of the sealing assembly (15), and the spring guide seat (12) is embedded in the spring bracket (16); a suction gland (17) is provided at the rear end of the rear section of the plunger (4), and the suction gland (17) is tightened by a locking nut (9), and the locking nut (9) is fixedly connected to the rear end of the horizontal cavity (2).

3. A novel hydraulic end assembly structure as claimed in claim 2, characterized in that: The sealing component (15) comprises a packing pressure ring (151), wherein a lubricating oil through hole (152) is provided in the packing pressure ring (151), and the lubricating oil through hole (152) is communicated with the lubricating oil hole (18) on the pump head body (1), and packing assemblies (153) are provided on both sides of the packing pressure ring (151), wherein a packing washer (154) is provided at the front end of the left packing assembly (153), and a packing spacer ring (155) is provided at the rear end of the right packing assembly (153).

4. A novel hydraulic end assembly structure as claimed in claim 1, characterized in that: Chamfers are provided at the cross-intersecting joints between the horizontal cavity (2) and the two vertical cavities (3).

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