Corrugated pipe gate valve with detachable valve seat ring

Abstract

According to the corrugated pipe gate valve with the detachable valve seat ring, the valve seat ring is arranged to be of a detachable structure, so that the valve seat ring can be conveniently replaced and repaired, the maintenance efficiency of the valve is improved, and the service life of the valve is prolonged. Meanwhile, through the design of the annular connecting end and the valve seat positioning ring groove, the valve seat ring can be stably fixed in the valve cavity, and the sealing performance and stability of the valve are guaranteed. In addition, a gap between the annular connecting end and the valve seat positioning ring groove can be effectively filled through the arrangement of the sealing unit, medium leakage is prevented, and the sealing performance of the valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary ware, in particular to a bellows gate valve with a detachable valve seat ring. Background Art

[0002] In the prior art, the valve seat of the bellows gate valve is mostly welded to the inner wall of the valve cavity, which is not conducive to disassembly, maintenance and replacement of the valve seat ring. Therefore, there is an urgent need for a detachable valve seat ring that will not have a poor seal after positioning. Summary of the invention

[0003] In view of this, the utility model provides a bellows gate valve with a detachable valve seat ring.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A bellows gate valve with a detachable valve seat ring comprises a valve body, a valve cavity is formed in the valve body, a valve seat ring and a valve core are arranged in the valve cavity, the valve seat rings are symmetrically arranged on both sides of the valve core, a valve seat positioning ring groove is provided on the inner wall of the valve cavity, a side of the valve seat ring close to the interior of the valve cavity protrudes to form an annular connecting end, the annular connecting end is formed on the inner ring side of the valve seat ring, the annular connecting end extends into the valve seat positioning ring groove and is detachably connected to the inner wall of the valve cavity, a sealing unit is arranged between the annular connecting end and the groove wall of the valve seat positioning ring groove, and the annular connecting end is sealingly connected to the inner wall of the valve seat positioning ring groove through the sealing unit.

[0006] Preferably, the annular connecting end has a threaded connecting portion and a sealing portion, and an internal thread with a corresponding threaded connecting portion is arranged on the groove wall of the valve seat positioning ring groove on the side away from the valve core, the annular connecting end extends into the valve seat positioning ring groove and is threadedly connected to the valve body, and the sealing unit is arranged between the sealing portion and the inner wall of the valve seat positioning ring groove.

[0007] Preferably, the sealing unit includes a plurality of sealing rings arranged at equal intervals and a sealing positioning end protruding from the sealing portion, the sealing rings are respectively sealingly connected to the sealing portion and the inner wall of the valve seat positioning ring groove, a plurality of sealing positioning ends are arranged at equal intervals, a sealing ring positioning groove is formed between the sealing positioning ends, the sealing ring is arranged in the sealing ring positioning groove, and the sealing positioning end limits the axial position of the sealing ring on the sealing portion.

[0008] Preferably, the sealing positioning end is an annular structure protruding from the sealing portion, the outer diameter of the sealing positioning end is smaller than the outer diameter of the sealing ring, the sealing ring is made of nitrile rubber, and the sealing ring is interference fit with the inner wall of the valve seat positioning ring groove.

[0009] Preferably, the valve seat ring has a valve core sealing surface, and the valve core sealing surface is arranged in an inclined structure, and the inclination direction of the valve core sealing surface is inclined from the top of the valve seat ring toward the center of the bottom of the valve core.

[0010] Preferably, the length of the threaded connection portion is greater than the length of the sealing portion.

[0011] Preferably, the valve seat ring is made of stainless steel.

[0012] The beneficial effect of the utility model is that by setting the valve seat ring as a detachable structure, the valve seat ring can be easily replaced and repaired, thereby improving the maintenance efficiency and service life of the valve. At the same time, through the design of the annular connection end and the valve seat positioning ring groove, the valve seat ring can be stably fixed in the valve cavity, ensuring the sealing and stability of the valve. In addition, the setting of the sealing unit can effectively fill the gap between the annular connection end and the valve seat positioning ring groove, prevent medium leakage, and improve the sealing performance of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Attached Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Attached Figure 2 For attachment Figure 1 Enlarged view of point A in . DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model will be further described below in conjunction with the accompanying drawings of the specification.

[0018] The utility model provides the following technical solutions:

[0019] As attached Figure 1-2As shown, the utility model discloses a bellows gate valve with a detachable valve seat ring, comprising a valve body 1, a valve cavity 2 is formed in the valve body 1, a valve seat ring 3 and a valve core 4 are arranged in the valve cavity 2, the valve seat ring 3 is made of stainless steel, the valve seat ring 3 is symmetrically arranged on both sides of the valve core 4, a valve seat positioning ring groove 5 is provided on the inner wall of the valve cavity 2, a side of the valve seat ring 3 close to the inside of the valve cavity 2 protrudes to form an annular connecting end 6, the annular connecting end 6 is formed on the inner ring side of the valve seat ring 3, the annular connecting end 6 extends into the valve seat positioning ring groove 5 and is detachably connected to the inner wall of the valve cavity 2, a sealing unit 7 is arranged between the annular connecting end 6 and the groove wall of the valve seat positioning ring groove 5, and the annular connecting end 6 is sealed and connected to the inner wall of the valve seat positioning ring groove 5 through the sealing unit 7. Specifically, in the present design, by setting the valve seat ring 3 as a detachable structure, the valve seat ring 3 can be easily replaced and repaired, thereby improving the maintenance efficiency and service life of the valve. At the same time, through the design of the annular connection end 6 and the valve seat positioning annular groove 5, the valve seat ring 3 can be stably fixed in the valve cavity 2, ensuring the sealing and stability of the valve. In addition, the setting of the sealing unit 7 can effectively fill the gap between the annular connection end 6 and the valve seat positioning annular groove 5, prevent medium leakage, and improve the sealing performance of the valve.

[0020] Furthermore, the annular connection end 6 has a threaded connection portion 8 and a sealing portion 9, the length of the threaded connection portion 8 is greater than the length of the sealing portion 9, an internal thread corresponding to the threaded connection portion 8 is provided on the groove wall of the valve seat positioning ring groove 5 away from the valve core 4, the annular connection end 6 extends into the valve seat positioning ring groove 5 and is threadedly connected to the valve body 1, and the sealing unit 7 is provided between the sealing portion 9 and the inner wall of the valve seat positioning ring groove 5. Specifically, in this embodiment, the threaded connection portion 8 of the annular connection end 6 cooperates with the internal thread in the valve seat positioning ring groove 5, and the detachable connection between the annular connection end 6 and the valve body 1 can be achieved by rotating the valve seat ring 3. This design not only simplifies the disassembly and assembly process of the valve seat ring 3, but also improves the stability and sealing of the connection. At the same time, the threaded connection design enables the valve seat ring 3 to better resist external forces when subjected to medium pressure, thereby improving the overall performance of the valve.

[0021] Further, the sealing unit 7 includes a plurality of sealing rings 10 arranged at equal intervals and a sealing positioning end 11 protruding from the sealing portion 9, wherein the sealing ring 10 is sealedly connected to the sealing portion 9 and the inner wall of the valve seat positioning ring groove 5, respectively, and a plurality of sealing positioning ends 11 are arranged at equal intervals, and a sealing ring positioning groove 12 is formed between the sealing positioning ends 11, wherein the sealing ring 10 is arranged in the sealing ring positioning groove 12, and the sealing positioning end 11 limits the axial position of the sealing ring 10 on the sealing portion 9. Specifically, in the present embodiment, the sealing ring 10 is evenly arranged between the sealing portion 9 and the inner wall of the valve seat positioning ring groove 5, effectively preventing the medium from leaking from the gap between the valve seat ring 3 and the valve body 1. The setting of the sealing positioning end 11 not only ensures the uniform distribution of the sealing ring 10 on the sealing portion 9, but also limits the axial position of the sealing ring 10 through the sealing ring positioning groove 12, further enhancing the sealing performance of the sealing ring 10.

[0022] Furthermore, the sealing positioning end 11 is formed on the sealing portion 9 in an annular structure, the outer diameter of the sealing positioning end 11 is smaller than the outer diameter of the sealing ring 10, the material of the sealing ring 10 is nitrile rubber, and the sealing ring 10 is interference fit with the inner wall of the valve seat positioning ring groove 5. Specifically, in this embodiment, the design of the sealing positioning end 11 makes the installation of the sealing ring 10 on the sealing portion 9 more stable and reliable. At the same time, since the outer diameter of the sealing positioning end 11 is smaller than the outer diameter of the sealing ring 10, the sealing ring 10 can better fit closely with the inner wall of the valve seat positioning ring groove 5 when subjected to medium pressure, thereby improving the sealing performance. In addition, nitrile rubber, as the material of the sealing ring 10, has excellent oil resistance, wear resistance and aging resistance, and can maintain the stability and reliability of the sealing performance for a long time.

[0023] Furthermore, the valve seat ring 3 has a valve core sealing surface 13, and the valve core sealing surface 13 is arranged in an inclined structure, and the inclination direction of the valve core sealing surface 13 is arranged in an inclined direction from the top of the valve seat ring 3 to the bottom center of the valve core 4. Specifically, in this embodiment, the inclined valve core sealing surface 13 can increase the contact area between the valve core 4 and the valve seat ring 3, and improve the sealing performance of the valve. And it is convenient for the valve core 4 to fall to the bottom along the inclined valve core sealing surface 13 when it is closed.

[0024] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bellows gate valve with a detachable valve seat ring, characterized in that: The valve body comprises a valve body, a valve cavity is formed in the valve body, a valve seat ring and a valve core are arranged in the valve cavity, the valve seat rings are symmetrically arranged on both sides of the valve core, a valve seat positioning ring groove is provided on the inner wall of the valve cavity, a side of the valve seat ring close to the inside of the valve cavity protrudes to form an annular connecting end, the annular connecting end is formed on the inner ring side of the valve seat ring, the annular connecting end extends into the valve seat positioning ring groove and is detachably connected to the inner wall of the valve cavity, a sealing unit is arranged between the annular connecting end and the groove wall of the valve seat positioning ring groove, and the annular connecting end is sealingly connected to the inner wall of the valve seat positioning ring groove through the sealing unit.

2. The bellows gate valve with a detachable valve seat ring according to claim 1, characterized in that: The annular connecting end has a threaded connecting portion and a sealing portion. An internal thread with a corresponding threaded connecting portion is arranged on the groove wall of the valve seat positioning ring groove on the side away from the valve core. The annular connecting end extends into the valve seat positioning ring groove and is threadedly connected to the valve body. The sealing unit is arranged between the sealing portion and the inner wall of the valve seat positioning ring groove.

3. The bellows gate valve with a detachable valve seat ring according to claim 2, characterized in that: The sealing unit includes a plurality of sealing rings arranged at equal intervals and a sealing positioning end protruding from the sealing portion, the sealing rings are respectively sealingly connected to the sealing portion and the inner wall of the valve seat positioning ring groove, a plurality of sealing positioning ends are arranged at equal intervals, a sealing ring positioning groove is formed between the sealing positioning ends, the sealing ring is arranged in the sealing ring positioning groove, and the sealing positioning end limits the axial position of the sealing ring on the sealing portion.

4. The bellows gate valve with a detachable valve seat ring according to claim 3, characterized in that: The sealing positioning end is annularly structured and protrudes from the sealing portion. The outer diameter of the sealing positioning end is smaller than the outer diameter of the sealing ring. The sealing ring is made of nitrile rubber. The sealing ring is interference fit with the inner wall of the valve seat positioning ring groove.

5. The bellows gate valve with a detachable valve seat ring according to claim 1, characterized in that: The valve seat ring has a valve core sealing surface, and the valve core sealing surface is arranged in an inclined structure. The inclination direction of the valve core sealing surface is that the top of the valve seat ring is inclined toward the center of the bottom of the valve core.

6. The bellows gate valve with a detachable valve seat ring according to claim 2, characterized in that: The length of the threaded connection portion is greater than the length of the sealing portion.

7. The bellows gate valve with a detachable valve seat ring according to claim 1, characterized in that: The valve seat ring is made of stainless steel.

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