High-pressure valve seat of underground rod type pump

Abstract

The utility model discloses a high-pressure valve seat of an underground rod type pump, which relates to the technical field of high-pressure valve seats and comprises a valve seat body, a first valve seat and a second valve seat are respectively arranged at the upper end and the lower end of the valve seat body, an oil passage is arranged in the valve seat body, an oil inlet hole is arranged on the second valve seat, and the oil inlet hole is communicated with the oil passage. A first oil outlet hole and a second oil outlet hole are formed in the valve seat body, and an oil outlet assembly is arranged in the valve seat body. The lower end of the valve seat body is connected with a filter screen, and the two sides of the filter screen are connected with the valve seat body through clamping assemblies. Through the arrangement of the filter screen, crude oil entering the valve seat body can be filtered, the situation that impurities in the crude oil enter the valve seat body and block a channel of the valve seat body is reduced, the phenomenon of pump blocking is reduced, the purity of the crude oil can be ensured, and high-quality raw materials are provided for subsequent machining; the filter screen is convenient to clean or replace.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure valve seat technical field, specifically is a kind of underground rod type pump high pressure valve seat. BACKGROUND

[0002] In the oil exploitation industry, underground rod type pump as core equipment, its working performance directly influences the oil exploitation efficiency and cost. High pressure valve seat as the key component, need to bear severe working environment, including high pressure, high temperature and corrosive medium test.

[0003] In the related art, the valve ball and the valve seat can be frequently and reliably opened and closed during the operation of the rod type oil well pump, thereby effectively controlling the flow of oil. Since the crude oil may contain impurities such as sand and scale in the underground environment. These impurities are easy to block the passage of the high pressure valve seat, resulting in pump sticking phenomenon. Pump sticking not only affects the normal operation of the pump, but also may damage other components of the pump. Therefore, the underground rod type pump high pressure valve seat is provided by the person skilled in the art to solve the problems raised in the above background art. SUMMARY

[0004] The utility model aims at providing a kind of underground rod type pump high pressure valve seat to solve the problems raised in the above background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of underground rod type pump high pressure valve seat, comprising:

[0007] Valve seat body, the first valve seat and the second valve seat are respectively arranged on the upper end and the lower end of the valve seat body, an oil passage is formed in the valve seat body, an oil inlet hole is formed in the second valve seat, a first oil outlet hole and a second oil outlet hole are respectively formed in the valve seat body, and an oil outlet assembly is arranged in the valve seat body.

[0008] The lower end of the valve seat body is connected with a filter screen, and the filter screen is connected with the valve seat body by a clamping assembly.

[0009] Preferably, the oil outlet assembly comprises a first sealing member and a valve ball, an arc-shaped groove is formed in the second valve seat for clamping the valve ball, the first sealing member is connected with the valve ball, and the first sealing member is in contact with the inner wall of the valve seat body.

[0010] Preferably, the oil outlet assembly further comprises a first return spring, a second return spring and a second sealing member, the first return spring is connected between the first sealing member and the second sealing member, the second return spring is connected between the second sealing member and the first valve seat, and the second sealing member is in contact with the inner wall of the valve seat body.

[0011] Preferably, the engaging assembly includes an L-shaped block, an engaging block, and a third return spring. The valve seat body has an installation groove for mounting the third return spring. The other end of the third return spring is connected to the L-shaped block. The engaging block is connected to one end of the L-shaped block. The filter screen has an engaging groove for engaging the engaging block.

[0012] Preferably, the filter screen is provided with limiting blocks on both sides, and the valve seat body is provided with a limiting groove for the limiting blocks to engage.

[0013] Preferably, a first sealing ring is provided between the first valve seat and the valve seat body, and a second sealing ring is provided between the second valve seat and the valve seat body.

[0014] Preferably, the valve seat body includes a hard alloy layer, and the outer side of the hard alloy layer is provided with an epoxy coating.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model, through the setting of the filter screen, can filter the crude oil entering the valve seat body, reduce the impurities in the crude oil from entering the valve seat body and clogging the valve seat body channel, reduce pump jamming, and ensure the purity of the crude oil, providing high-quality raw materials for subsequent processing.

[0017] 2. This utility model uses an oil outlet component to control oil extraction, and uses a locking component to lock and fix the filter screen to the outside of the valve seat body for filtering, and also makes it easy to clean or replace the filter screen. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a high-pressure valve seat for an underground rod pump in an embodiment of this application;

[0019] Figure 2 This is a cross-sectional view of a high-pressure valve seat for an underground rod pump according to an embodiment of this application.

[0020] Figure 3 This is a schematic cross-sectional view of an L-shaped block of a high-pressure valve seat for an underground rod pump according to an embodiment of this application.

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a partial cross-sectional view of a high-pressure valve seat for an underground rod pump according to an embodiment of this application.

[0023] In the figure: 1, valve seat body; 2, first valve seat; 3, second valve seat; 4, oil passage; 5, oil inlet hole; 6, first oil outlet hole; 7, second oil outlet hole; 8, filter screen; 9, first sealing element; 10, valve ball; 11, arc-shaped slot; 12, first return spring; 13, second return spring; 14, second sealing element; 15, L-shaped block; 16, clamping block; 17, third return spring; 18, mounting groove; 19, clamping groove; 20, limiting block; 21, first sealing ring; 22, second sealing ring; 23, hard alloy layer; 24, epoxy coating; 25, limiting groove. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-5 The utility model provides a technical scheme:

[0026] A high-pressure valve seat of an underground rod pump, comprising:

[0027] The valve seat body 1 is provided with a first valve seat 2 and a second valve seat 3 at the upper end and the lower end respectively, an oil passage 4 is formed in the valve seat body 1, an oil inlet hole 5 is formed in the second valve seat 3, a first oil outlet hole 6 and a second oil outlet hole 7 are formed in the valve seat body 1 respectively, and an oil outlet assembly is arranged in the valve seat body 1.

[0028] Specifically, the oil outlet assembly comprises a first sealing element 9 and a valve ball 10, an arc-shaped slot 11 for clamping the valve ball 10 is formed in the second valve seat 3, the first sealing element 9 is connected with the valve ball 10, and the first sealing element 9 is in contact with the inner wall of the valve seat body 1, the oil outlet assembly further comprises a first return spring 12, a second return spring 13 and a second sealing element 14, the first return spring 12 is connected between the first sealing element 9 and the second sealing element 14, the second return spring 13 is connected between the second sealing element 14 and the first valve seat 2, and the second sealing element 14 is in contact with the inner wall of the valve seat body 1.

[0029] When the oil is pumped, the crude oil enters the oil passage 4 from the oil inlet hole 5, the crude oil extrudes the valve ball 10, the valve ball 10 can drive the first sealing member 9 to move in the oil passage 4, the first oil outlet hole 6 is exposed, the crude oil is discharged from the first oil outlet hole 6, when the crude oil pressure is larger, the valve ball 10 moves in the oil passage 4, extruding the first reset spring 12, the first reset spring 12 extrudes the second sealing member 14, the second sealing member 14 moves, the second oil outlet hole 7 is exposed, the crude oil is discharged from the second oil outlet hole 7, when the device is not used, the first reset spring 12 and the second reset spring 13 can respectively push the first sealing member 9 and the second sealing member 14 to block the first oil outlet hole 6 and the second oil outlet hole 7, and can push the valve ball 10 to block the oil inlet hole 5.

[0030] The lower end of the valve seat body 1 is connected with the filter screen 8, the two sides of the filter screen 8 are connected with the valve seat body 1 through the clamping assembly, the clamping assembly includes the L-shaped block 15, the clamping block 16 and the third reset spring 17, the valve seat body 1 is provided with the installation groove 18 for installing the third reset spring 17, the other end of the third reset spring 17 is connected with the L-shaped block 15, the clamping block 16 is connected with one end of the L-shaped block 15, the filter screen 8 is provided with the clamping groove 19 for clamping the clamping block 16.

[0031] Through the setting of the filter screen 8, the crude oil entering the valve seat body 1 through the oil inlet hole 5 can be filtered, the impurities in the crude oil entering the valve seat body 1 to block the channel of the valve seat body 1 is reduced, the pump jamming phenomenon is reduced, and the purity of the crude oil can be ensured, providing high-quality raw materials for subsequent processing.

[0032] When the filter screen 8 is installed, the filter screen 8 is connected with the lower end of the valve seat body 1, the clamping block 16 is a triangular clamping block 16, so the inclined surface of the clamping block 16 is connected with the filter screen 8, extruding the filter screen 8, the clamping block 16 can be extruded and moved, after the filter screen 8 is completely connected with the lower end of the valve seat body 1, the third reset spring 17 releases the elastic potential energy, the L-shaped block 15 is pushed to move, so as to drive the clamping block 16 to be clamped in the clamping groove 19, that is, the filter screen 8 can be installed;

[0033] When the filter screen 8 is disassembled, the L-shaped block 15 is pressed to move, the clamping block 16 is moved out of the clamping groove 19, then the filter screen 8 is separated from the valve seat body 1.

[0034] In summary, the filter screen 8 can be quickly clamped and fixed outside the valve seat body 1, so that the filter screen 8 is filtered and used, and the filter screen 8 is convenient to clean or replace.

[0035] Further, the filter screen 8 is provided with the limiting block on the two sides, the valve seat body 1 is provided with the limiting groove 25 for clamping the limiting block, when the filter screen 8 is installed, the limiting block on the filter screen 8 is clamped in the limiting groove 25, the filter screen 8 can be limited during installation, so as to improve the installation efficiency of the filter screen 8.

[0036] The first sealing ring 21 is arranged between the first valve seat 2 and the valve seat body 1, and the second sealing ring 22 is arranged between the second valve seat 3 and the valve seat body 1, so that the connection sealing performance between the first valve seat 2 and the valve seat body 1 and the connection sealing performance between the second valve seat 3 and the valve seat body 1 are improved.

[0037] The valve seat body 1 comprises a hard alloy layer 23, the hard alloy is usually made of tungsten, cobalt and other metal powder through high-temperature pressing and sintering, so it has very high hardness and wear resistance, can effectively resist the erosion of harsh working conditions, and prolong the service life of the valve seat body 1. The outer side of the hard alloy layer 23 is provided with an epoxy coating 24, which can effectively resist the wear and scratch of the external environment, thereby further prolonging the service life of the valve seat body 1.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-pressure valve seat for an underground rod pump, characterized in that, include: A valve seat body (1) is provided with a first valve seat (2) and a second valve seat (3) at its upper and lower ends, respectively. An oil passage (4) is provided inside the valve seat body (1). An oil inlet hole (5) is provided on the second valve seat (3). A first oil outlet hole (6) and a second oil outlet hole (7) are provided on the valve seat body (1). An oil outlet assembly is provided inside the valve seat body (1). The lower end of the valve seat body (1) is connected to a filter screen (8), and the two sides of the filter screen (8) are connected to the valve seat body (1) through a snap-fit ​​assembly.

2. The high-pressure valve seat for an underground rod pump according to claim 1, characterized in that: The oil outlet assembly includes a first seal (9) and a valve ball (10). The second valve seat (3) has an arc-shaped groove (11) for the valve ball (10) to engage. The first seal (9) is connected to the valve ball (10) and is in contact with the inner wall of the valve seat body (1).

3. A high-pressure valve seat for an underground rod pump according to claim 2, characterized in that: The oil outlet assembly also includes a first return spring (12), a second return spring (13), and a second seal (14). The first return spring (12) is connected between the first seal (9) and the second seal (14). The second return spring (13) is connected between the second seal (14) and the first valve seat (2). The second seal (14) is in contact with the inner wall of the valve seat body (1).

4. A high-pressure valve seat for an underground rod pump according to claim 1, characterized in that: The engaging assembly includes an L-shaped block (15), an engaging block (16), and a third return spring (17). The valve seat body (1) has an mounting groove (18) for mounting the third return spring (17). The other end of the third return spring (17) is connected to the L-shaped block (15). The engaging block (16) is connected to one end of the L-shaped block (15). The filter screen (8) has an engaging groove (19) for engaging the engaging block (16).

5. A high-pressure valve seat for an underground rod pump according to claim 1, characterized in that: The filter screen (8) is provided with limiting blocks (20) on both sides, and the valve seat body (1) is provided with a limiting groove (25) for the limiting blocks (20) to engage.

6. A high-pressure valve seat for an underground rod pump according to claim 1, characterized in that: A first sealing ring (21) is provided between the first valve seat (2) and the valve seat body (1), and a second sealing ring (22) is provided between the second valve seat (3) and the valve seat body (1).

7. A high-pressure valve seat for an underground rod pump according to claim 1, characterized in that: The valve seat body (1) includes a hard alloy layer (23), and the outer side of the hard alloy layer (23) is provided with an epoxy coating (24).

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