Pump valve structure of leaking stoppage liquid delivery pump

Abstract

The utility model discloses a plugging liquid delivery pump valve structure, and belongs to the technical field of reciprocating pump valves. Comprising an annular valve seat, an annular sealing seat and an annular guide seat which are coaxially arranged from bottom to top, the lower end of the annular sealing seat is embedded in the upper portion of the annular valve seat, the upper end of the annular valve seat is in threaded connection with the annular guide seat, and the upper end of the annular sealing seat is embedded in the annular guide seat; the annular sealing seat is pressed on the upper part of the annular valve seat through the annular guide seat; a valve ball capable of moving up and down and rotating freely is installed in the annular guide seat, and when the valve ball falls to be tightly attached to the upper end of the annular sealing seat, the pump valve is closed. During working, the valve ball rotates while moving up and down in the guide seat, sundries on the sealing surface of the sealing seat are automatically removed through rotation of the valve ball, the sealing surface of the sealing seat is kept clean all the time, the pump valve is ensured to be completely closed, and continuous conveying of leaking stoppage liquid is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating pump valves, in particular to a leak-blocking liquid delivery pump valve structure. Background Art

[0002] During the oil drilling process, well leakage exists for a long time. In order to ensure the normal progress of the drilling process, it is necessary to inject plugging fluid into the well through a mud pump to plug the leakage point; the main components of the plugging fluid are: water, sawdust, bentonite, profile control fluid, cotton seeds, walnut skins, stones, etc., among which the walnut skins are the size of a fingernail and the longest stone is 25mm; the existing mud pump valve core and valve seat are sealed by a conical sealing surface. During the working process, after the valve core and the valve seat are opened, the above-mentioned debris contained in the plugging fluid is easily attached to the sealing surface. When closed, the sealing surface is easily separated by the debris attached thereto, causing the valve core and the valve seat to be unable to be completely closed, so that the mud pump cannot work normally and requires frequent maintenance, which is not only labor-intensive but also low in work efficiency. Summary of the invention

[0003] The utility model provides a pump valve structure of a leak-blocking liquid delivery pump to overcome the shortcomings of the prior art.

[0004] The technical solution adopted by the utility model is: a pump valve structure of a plugging liquid delivery pump, comprising an annular valve seat, an annular sealing seat, and an annular guide seat coaxially arranged from bottom to top, the lower end of the annular sealing seat is embedded in the upper part of the annular valve seat, the upper end of the annular valve seat is threadedly connected with an annular guide seat, and the upper end of the annular sealing seat is embedded in the annular guide seat, and the annular sealing seat is pressed onto the upper part of the annular valve seat through the annular guide seat; a valve ball that can move up and down and rotate freely is installed in the annular guide seat, and the pump valve is closed when the valve ball falls and fits tightly against the upper end of the annular sealing seat.

[0005] The upper end surface of the annular sealing seat is a conical surface, and the bottom of the conical surface protrudes inward to form a conical sealing surface; the conical angle α of the conical sealing surface is 64°-66°, and the height H is 2-3 mm; when the valve ball falls and fits tightly against the conical sealing surface, the pump valve is closed.

[0006] The upper part of the annular guide seat is evenly distributed with notches, so that a number of symmetrically arranged guide columns are formed on the upper part of the annular guide seat. The cross-section of the guide column is an isosceles triangle structure with the sharp corner facing inward, and the sharp corner is chamfered to form a vertical guide surface, and the vertical guide surface protrudes from the inner diameter of the bottom of the annular guide seat; the valve ball is guided by the vertical guide surface when moving up and down.

[0007] The upper end of the annular sealing seat is embedded in the inner diameter of the bottom of the annular guide seat. The outer diameter of the annular sealing seat is provided with a shoulder, and the lower end of the annular guide seat abuts against the shoulder.

[0008] The annular sealing seat is a non-metallic structure.

[0009] A sealing ring is arranged between the outer diameter of the annular sealing seat and the annular valve seat.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. When the utility model is working, the valve ball moves up and down in the guide seat and rotates at the same time. The debris on the sealing surface of the sealing seat is automatically removed through the rotation of the valve ball, and the sealing surface of the sealing seat is always kept clean, ensuring that the pump valve is completely closed, and realizing continuous delivery of the plugging liquid.

[0012] 2. The upper part of the guide seat of the utility model is evenly distributed with large notches, which facilitates the smooth passage of debris in the plugging liquid and ensures that the plugging liquid conveying channel is unobstructed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the annular sealing seat of the utility model;

[0015] Figure 3 yes Figure 2 A schematic diagram of the partially enlarged structure;

[0016] Figure 4 It is a structural schematic diagram of the annular guide seat of the utility model. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-4 The utility model is described in detail with specific implementation modes.

[0018] A valve structure of a plugging liquid delivery pump comprises an annular valve seat 1, an annular sealing seat 2 and an annular guide seat 3 which are coaxially arranged from bottom to top, wherein the lower end of the annular sealing seat 2 is embedded in the upper part of the annular valve seat 1, the upper end of the annular valve seat 1 is threadedly connected with the annular guide seat 3, and the upper end of the annular sealing seat 2 is embedded in the annular guide seat 3, and the annular sealing seat 2 is press-fitted onto the upper part of the annular valve seat 1 through the annular guide seat 3; a valve ball 4 which can move up and down and rotate freely is installed in the annular guide seat 3, and the pump valve is closed when the valve ball 4 falls and fits tightly against the upper end of the annular sealing seat 2.

[0019] Furthermore, the upper end surface of the annular sealing seat 2 is a conical surface 2-2, which ensures smooth inflow and outflow of the plugging liquid; the bottom of the conical surface 2-2 protrudes inward to form a conical sealing surface 2-1; the conical angle α of the conical sealing surface 2-1 is 64°-66°, and the height H is 2-3 mm; when the valve ball 4 falls and fits closely with the conical sealing surface 2-1, the pump valve is closed. By reducing the close contact area between the valve ball 4 and the upper end of the annular sealing seat 2 after the valve ball 4 falls, the sealing effect is improved, the processing accuracy is reduced, and the yield rate is improved.

[0020] In one embodiment, the cone angle α is preferably 65°, and H is preferably 2.5 mm.

[0021] Furthermore, the annular sealing seat 2 is a non-metallic structure, preferably made of polyurethane, to reduce wear of the valve ball 4 and ensure a sealing effect.

[0022] Furthermore, a sealing ring 5 is provided between the outer diameter of the annular sealing seat 2 and the annular valve seat 1 to ensure a sealing effect.

[0023] Furthermore, the annular guide seat 3 has evenly distributed notches 3-1 on the upper part, so that a plurality of symmetrically arranged guide columns 3-2 are formed on the upper part of the annular guide seat 3. The cross section of the guide column 3-2 is an isosceles triangle structure with the sharp corner facing inward, and the sharp corner is chamfered to form a vertical guide surface 3-3, and the vertical guide surface 3-3 protrudes from the inner diameter of the bottom of the annular guide seat 3. When the valve ball 4 moves up and down, it is guided by the vertical guide surface 3-3, which reduces the contact area between the annular guide seat 3 and the valve ball 4, reduces the friction force, and facilitates the up and down movement of the valve ball 4. The upper end of the annular sealing seat 2 is embedded in the inner diameter of the bottom of the annular guide seat 3, and the outer diameter of the annular sealing seat 2 has a shoulder 2-3, and the lower end of the annular guide seat 3 abuts against the shoulder 2-3.

[0024] In one embodiment, the annular valve seat 1 is provided with an annular recess 1-2 and a first internal thread 1-1 at the upper portion, the guide frame 3 is provided with an external thread 3-4 at the lower portion, and the first internal thread 1-1 is threadedly connected to the external thread 3-4; the lower end of the annular sealing seat 2 is embedded in the annular recess 1-2.

[0025] In order to facilitate the disassembly of the utility model, a second internal thread 1-3 is provided at the lower part of the inner cavity of the annular valve seat 1. The utility model can be disassembled from the pump head by threading a disassembly tool with the second internal thread 1-3.

[0026] During the working process of the utility model, when the pump valve is opened and closed, since the plugging liquid contains various impurities, different impurities are contained at various points in the flow process, and the specific gravity and flow rate are also different. Therefore, the valve ball 4 will rotate under the action of the plugging liquid during the lifting and falling process. When the valve ball 4 falls to the conical sealing surface 2-1, the impurities on the conical sealing surface 2-1 are automatically cleaned (scraped) away by the self-rotation of the valve ball 4, and the conical sealing surface of the sealing seat is always kept clean, ensuring that the pump valve is completely closed, and realizing continuous delivery of the plugging liquid.

[0027] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A valve structure for a plugging liquid delivery pump, characterized in that: The invention comprises an annular valve seat (1), an annular sealing seat (2), and an annular guide seat (3) which are coaxially arranged from bottom to top, wherein the lower end of the annular sealing seat (2) is embedded in the upper part of the annular valve seat (1), the upper end of the annular valve seat (1) is threadedly connected with the annular guide seat (3), and the upper end of the annular sealing seat (2) is embedded in the annular guide seat (3), and the annular sealing seat (2) is pressed onto the upper part of the annular valve seat (1) through the annular guide seat (3); a valve ball (4) which can move up and down and rotate freely is installed in the annular guide seat (3), and when the valve ball (4) falls and closely contacts the upper end of the annular sealing seat (2), the pump valve is closed.

2. The valve structure of the plugging liquid delivery pump according to claim 1 is characterized in that: The upper end surface of the annular sealing seat (2) is a conical surface (2-2), and the bottom of the conical surface (2-2) protrudes inward to form a conical sealing surface (2-1); the conical angle α of the conical sealing surface is 64°-66°, and the height H is 2-3 mm; when the valve ball (4) falls and is in close contact with the conical sealing surface (2-1), the pump valve is closed.

3. The valve structure of the plugging liquid delivery pump according to claim 1 or 2, characterized in that: The annular guide seat (3) has evenly distributed notches (3-1) on its upper portion, so that a plurality of symmetrically arranged guide columns (3-2) are formed on its upper portion, the guide columns (3-2) having a cross-section that is an isosceles triangle structure with sharp corners facing inward, and the sharp corners are chamfered to form vertical guide surfaces (3-3), and the vertical guide surfaces (3-3) protrude from the inner diameter of the bottom of the annular guide seat (3); the valve ball (4) is guided by the vertical guide surfaces (3-3) when it moves up and down.

4. The valve structure of the plugging liquid delivery pump according to claim 3 is characterized in that: The upper end of the annular sealing seat (2) is embedded in the inner diameter of the bottom of the annular guide seat (3), the outer diameter of the annular sealing seat (2) is provided with a shoulder (2-3), and the lower end of the annular guide seat (3) abuts against the shoulder (2-3).

5. The valve structure of the plugging liquid delivery pump according to claim 4 is characterized in that: The annular sealing seat (2) is a non-metallic structure.

6. The valve structure of the plugging liquid delivery pump according to claim 4 is characterized in that: A sealing ring (5) is provided between the outer diameter of the annular sealing seat (2) and the annular valve seat (1).

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