Ball valve seat with anti-leakage structure

Abstract

This utility model relates to the field of valve technology, specifically to a ball valve seat with an anti-leakage structure. It includes a main valve seat, a valve handle seat mounted on the main valve seat, and a secondary valve seat detachably connected to the main valve seat. On the sides of the main and secondary valve seats adjacent to each other, an outer groove and an inner groove are sequentially arranged from the outer ring to the inner ring. An intermediate pressing groove is provided between the outer and inner grooves. The outer groove, intermediate pressing groove, and inner groove are all annular. An outer sealing ring is embedded in the outer groove, and an inner sealing ring is embedded in the inner groove. Multiple positioning protrusions arranged in annular and equally spaced patterns are fixedly installed on the side of the secondary valve seat. Multiple insertion positioning grooves arranged in annular and equally spaced patterns are provided on the side of the main valve seat. The positioning protrusions are located within the insertion positioning grooves and are inserted into and engaged with the insertion positioning grooves. This utility model has a good sealing effect and is not prone to leakage.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a ball valve seat with a leak-proof structure. Background Technology

[0002] Ball valves are widely used in pipeline systems in petroleum, chemical, and water conservancy industries due to their large flow capacity and rapid opening and closing. As a key sealing component of ball valves, the sealing performance of the valve seat directly affects the performance of the ball valve.

[0003] Patent CN104295763A discloses a ball valve seat, belonging to the technical field of engineering components or parts. This ball valve seat includes an annular outer valve seat and an annular inner valve seat embedded within the annular outer valve seat; the inner wall of the annular inner valve seat near the valve ball has a beveled surface; and the annular outer valve seat is filled with a ring-shaped metal skeleton. This valve seat can withstand higher pressures, with a maximum pressure of 4.0 MPa, and does not exhibit creep within its pressure-bearing range. Furthermore, compared to contact surfaces made of a single material, the composite material end face is more wear-resistant and has better sealing performance.

[0004] While the aforementioned technical solutions offer corresponding advantages, most traditional ball valve seats still have some shortcomings in use. For example, most traditional ball valve seats employ a single sealing structure, which is prone to leakage under high pressure, high temperature, or corrosive media conditions due to wear, aging, or improper assembly of the seals. This not only wastes the media but may also lead to safety accidents. Therefore, we propose a ball valve seat with a leak-proof structure. Utility Model Content

[0005] The purpose of this invention is to provide a ball valve seat with a leak-proof structure to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A ball valve seat with a leak-proof structure includes a main valve seat, a valve handle seat disposed on the main valve seat, and a secondary valve seat detachably connected to the main valve seat. The main valve seat and the secondary valve seat have an outer groove and an inner groove arranged sequentially from the outer ring to the inner ring on their adjacent sides. An intermediate extrusion groove is provided between the outer groove and the inner groove. The outer groove, the intermediate extrusion groove, and the inner groove are all annular. An outer sealing ring is embedded in the outer groove, and an inner sealing ring is embedded in the inner groove.

[0008] Preferably, the inner diameter of the outer groove is larger than the inner diameter of the inner groove, and the inner diameter of the inner groove is larger than the inner diameter of the intermediate extrusion groove.

[0009] Preferably, the inner side of the intermediate extrusion groove away from its opening is an arc-shaped surface, and the size of the inner sealing ring is adapted to the size of the inner groove.

[0010] Preferably, a plurality of positioning protrusions arranged in a ring at equal intervals are fixedly installed on the side of the auxiliary valve seat, and a plurality of insertion positioning grooves arranged in a ring at equal intervals are provided on the side of the main valve seat, wherein the positioning protrusions are located in the insertion positioning grooves and are inserted into the insertion positioning grooves.

[0011] This setting allows for guidance between the secondary valve seat and the main valve seat.

[0012] Preferably, both the main valve seat and the auxiliary valve seat are integrally formed with end flanges, and a flange sealing ring is embedded in the end face of the end flange;

[0013] This feature facilitates the installation of the end flange to external piping.

[0014] Preferably, a support sleeve is installed at the bottom of both the main valve seat and the auxiliary valve seat, and the cross-section of the support sleeve is annular.

[0015] Preferably, a reinforcing base is also fixedly installed between the support sleeve and the corresponding main valve seat and the auxiliary valve seat, the reinforcing base being used to increase the fixed contact area;

[0016] Preferably, a fixed support rod is inserted into the support sleeve, the fixed support rod is fixedly installed on the external frame, and a limit end is fixedly installed at the end of the fixed support rod;

[0017] The above three settings enable the main valve seat and the auxiliary valve seat to be fixedly installed at the corresponding external positions using fixed support rods when their bottoms are suspended in the air, thus providing support for the main valve seat and the auxiliary valve seat.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model uses the outer groove and inner groove on the main valve seat and the auxiliary valve seat to install the outer sealing ring and the inner sealing ring respectively. The arc-shaped surface of the middle extrusion groove enhances the extrusion effect of the sealing element, forming a multi-seal structure. This solves the problem of easy leakage of traditional single seals and achieves the effect of improving the overall sealing performance of the valve seat.

[0020] 2. This utility model utilizes the precise docking of the main valve seat and the auxiliary valve seat through positioning protrusions and insertion positioning grooves. The flange sealing ring of the end flange enhances the sealing performance with the pipeline, ensuring stable assembly and avoiding leakage caused by improper assembly, thereby improving the structural assembly accuracy and connection sealing performance.

[0021] 3. This utility model utilizes a support sleeve, a reinforced base, and a fixed support rod to provide stable support for the main valve seat and the auxiliary valve seat, preventing the valve seat from deforming or displacing under the action of medium pressure. Combined with a multi-seal structure, it can adapt to complex working conditions such as high pressure and high temperature, thereby improving the stability and durability of the valve seat. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0024] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This utility model Figure 2 Enlarged view of point B in the middle;

[0026] Figure 5 This is a partial structural schematic diagram of the present invention;

[0027] The meanings of the labels in the diagram are as follows:

[0028] 1. Main valve seat; 10. Valve handle seat; 11. Auxiliary valve seat; 12. External groove; 13. Intermediate extrusion groove; 14. Internal groove; 15. Positioning protrusion; 16. Insertion positioning groove; 17. External sealing ring; 18. Internal sealing ring; 19. End flange; 191. Flange sealing ring;

[0029] 2. Support sleeve; 20. Reinforced base; 21. Fixed support rod; 22. Limiting end. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-5This utility model provides a technical solution: a ball valve seat with an anti-leakage structure, including a main valve seat 1, a valve handle seat 10 disposed on the main valve seat 1, and a secondary valve seat 11 detachably connected to the main valve seat 1 by multiple fastening screws and nuts. On the sides of the main valve seat 1 and the secondary valve seat 11 that are close to each other, an outer groove 12 and an inner groove 14 are arranged sequentially from the outer ring to the inner ring. An intermediate extrusion groove 13 is arranged between the outer groove 12 and the inner groove 14. The outer groove 12, the intermediate extrusion groove 13 and the inner groove 14 are all annular. An outer sealing ring 17 is embedded in the outer groove 12 and an inner sealing ring 18 is embedded in the inner groove 14. The outer sealing ring 17 and the inner sealing ring 18 are installed in the outer groove 12 and the inner groove 14 respectively. The intermediate extrusion groove 13 enhances the extrusion effect of the sealing element, forming multiple seals, making it difficult for the medium to leak, thereby improving the anti-leakage performance of the valve seat.

[0032] In this embodiment, the inner diameter of the outer groove 12 is larger than the inner diameter of the inner groove 14, and the inner diameter of the inner groove 14 is larger than the inner diameter of the middle extrusion groove 13, so that the outer sealing ring 17, the inner sealing ring 18 and the middle extrusion area are distributed in a stepped manner. The outer sealing ring 17 can undergo elastic deformation towards the middle extrusion groove 13, thereby expanding the sealing coverage area and achieving the effect of optimizing the sealing structure.

[0033] It is worth noting that the size of the outer sealing ring 17 is adapted to the size of the outer groove 12 and the middle extrusion groove 13. After the main valve seat 1 and the auxiliary valve seat 11 are closed and fixed, the main valve seat 1 and the auxiliary valve seat 11 extrude the outer sealing ring 17, so that part of the structure of the outer sealing ring 17 is extruded into the middle extrusion groove 13 and abuts against the inner sealing ring 18, thereby achieving a compression sealing operation.

[0034] Specifically, the inner side of the middle extrusion groove 13 away from its opening is an arc-shaped surface. The size of the inner sealing ring 18 is adapted to the size of the inner groove 14. The arc-shaped surface enhances the extrusion force on the seal, and the inner sealing ring 18 fits tightly, thereby improving the sealing reliability.

[0035] Furthermore, multiple positioning protrusions 15 arranged in a ring at equal intervals are fixedly installed on the side of the auxiliary valve seat 11, and multiple insertion positioning grooves 16 arranged in a ring at equal intervals are provided on the side of the main valve seat 1. The positioning protrusions 15 are located in the insertion positioning grooves 16 and are inserted into the insertion positioning grooves 16 to ensure that the main valve seat 1 and the auxiliary valve seat 11 are precisely connected, avoiding misalignment during installation that could affect the seal and ensuring assembly accuracy.

[0036] like Figure 1 As shown, both the main valve seat 1 and the auxiliary valve seat 11 are integrally formed with end flanges 19. The end face of the end flange 19 is embedded with a flange sealing ring 191, which makes the flange more tightly connected to the external pipeline, prevents leakage at the connection, and achieves the effect of enhancing the overall sealing performance.

[0037] like Figure 1 As shown, a support sleeve 2 is installed at the bottom of both the main valve seat 1 and the auxiliary valve seat 11. The cross-section of the support sleeve 2 is annular. The support sleeve 2 provides stable support, making the valve seat installation more stable and achieving the effect of improving the stability of the valve seat placement.

[0038] In addition, a reinforcing base 20 is fixedly installed between the support sleeve 2 and the corresponding main valve seat 1 and auxiliary valve seat 11. The reinforcing base 20 is used to increase the fixed contact area, disperse the pressure, make the support more solid, and achieve the effect of enhancing the stability of the support structure.

[0039] It is worth noting that a fixed support rod 21 is inserted into the support sleeve 2. The fixed support rod 21 is fixedly installed on the external frame. The end of the fixed support rod 21 is fixedly installed with a limit end 22. When the main valve seat 1 and the auxiliary valve seat 11 are installed in the pipeline and their bottoms are suspended, the fixed support rod 21 is fixedly installed at the corresponding position on the outside to support the main valve seat 1 and the auxiliary valve seat 11, prevent the valve seat from deforming due to the medium pressure, and achieve the effect of ensuring the stability of the valve seat structure.

[0040] When using the ball valve seat with anti-leakage structure of this utility model, the outer sealing ring 17 is embedded in the outer groove 12 of the main valve seat 1 and the auxiliary valve seat 11, and the inner sealing ring 18 is embedded in the inner groove 14. The positioning protrusion 15 of the auxiliary valve seat 11 is aligned with the insertion positioning groove 16 of the main valve seat 1 so that the two are precisely connected. The arc-shaped surface of the middle compression groove 13 compresses the sealing element to form multiple seals.

[0041] The valve seat is connected to the external pipeline via the end flange 19. The flange sealing ring 191 enhances the sealing performance at the connection. The condition of the sealing ring should be checked regularly. If replacement is required, the main valve seat 1 and the auxiliary valve seat 11 should be separated and a new sealing ring should be installed.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ball valve seat with a leak-proof structure, comprising a main valve seat (1), a valve handle seat (10) disposed on the main valve seat (1), and a secondary valve seat (11) detachably connected to the main valve seat (1), characterized in that: On the sides of the main valve seat (1) and the auxiliary valve seat (11) that are close to each other, an outer groove (12) and an inner groove (14) are arranged sequentially from the outer ring to the inner ring. An intermediate extrusion groove (13) is arranged between the outer groove (12) and the inner groove (14). The outer groove (12), the intermediate extrusion groove (13) and the inner groove (14) are all annular. An outer sealing ring (17) is embedded in the outer groove (12), and an inner sealing ring (18) is embedded in the inner groove (14).

2. The ball valve seat with leak-proof structure according to claim 1, characterized in that: The inner diameter of the outer groove (12) is larger than the inner diameter of the inner groove (14), and the inner diameter of the inner groove (14) is larger than the inner diameter of the intermediate extrusion groove (13).

3. The ball valve seat with leak-proof structure according to claim 1, characterized in that: The inner side of the middle extrusion groove (13) away from its opening is an arc-shaped surface, and the size of the inner sealing ring (18) is adapted to the size of the inner groove (14).

4. The ball valve seat with leak-proof structure according to claim 1, characterized in that: The side of the secondary valve seat (11) is fixedly equipped with a plurality of positioning protrusions (15) arranged in a ring at equal intervals. The side of the main valve seat (1) is provided with a plurality of insertion positioning grooves (16) arranged in a ring at equal intervals. The positioning protrusions (15) are located in the insertion positioning grooves (16) and are inserted into the insertion positioning grooves (16).

5. The ball valve seat with leak-proof structure according to claim 1, characterized in that: Both the main valve seat (1) and the auxiliary valve seat (11) are integrally formed with end flanges (19), and the end flanges (19) are fitted with flange sealing rings (191) on their end faces.

6. The ball valve seat with leak-proof structure according to claim 1, characterized in that: Both the main valve seat (1) and the auxiliary valve seat (11) are equipped with support sleeves (2) at their bottoms, and the cross-section of the support sleeves (2) is annular.

7. The ball valve seat with anti-leakage structure according to claim 6, characterized in that: A reinforcing base (20) is also fixedly installed between the support sleeve (2) and the corresponding main valve seat (1) and the auxiliary valve seat (11). The reinforcing base (20) is used to increase the fixed contact area.

8. The ball valve seat with leak-proof structure according to claim 7, characterized in that: The support sleeve (2) is fitted with a fixed support rod (21), which is fixedly installed on the external frame. The end of the fixed support rod (21) is fixedly installed with a limit end (22).

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