Anti-permeation stop valve

Abstract

The utility model relates to the technical field of stop valves, and discloses an anti-permeation stop valve which comprises a valve body, a valve cover and a valve shaft, the valve cover is arranged on the valve body, a valve element is arranged on the valve shaft, the valve shaft is connected to the valve cover in a sliding mode, a sealing ring is arranged on the valve shaft, when the valve element is not located in the valve body, the valve element abuts against the valve cover, and when the valve element is not located in the valve body, the valve element abuts against the valve cover. According to the stop valve, the valve element abuts against the valve deck, the sealing ring abuts against the valve deck, the gap between the valve element and the valve deck is connected with the sealing ring in an abutting mode, and therefore the sealing effect is improved through abutting of the sealing ring and the valve deck, a medium is blocked by the sealing ring and cannot directly pass through the gap between the valve shaft and the valve deck, and the anti-permeation effect of the stop valve is improved.

Description

Technical Field

[0001] The present application relates to the technical field of globe valves, and more particularly to an anti-permeation globe valve. Background Art

[0002] A globe valve, also known as a stop valve, belongs to a forced-sealing valve. It is a valve that realizes opening and closing by the valve disc moving linearly along the center line of the fluid. When the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak and ensure that the medium cannot flow through.

[0003] In the related art, a globe valve includes a valve body, a valve cover, and a valve shaft. The valve cover is bolted to the valve body, the valve shaft is slidably connected to the valve body and the valve cover, and a valve core is provided on the valve shaft. When the valve core seals the inside of the valve body, the globe valve is closed, and when the valve core does not seal the inside of the valve body, the globe valve is open.

[0004] When the globe valve is open, since the valve shaft is slidably connected to the valve cover, there is a certain gap between the valve shaft and the valve cover, which may cause the medium to seep out along the gap between the valve shaft and the valve cover, affecting the sealing performance of the globe valve. Summary of the Utility Model

[0005] In order to improve the problem of easy seepage of the globe valve, the present application provides an anti-permeation globe valve.

[0006] An anti-permeation globe valve provided by the present application adopts the following technical solutions:

[0007] An anti-permeation globe valve includes a valve body, a valve cover, and a valve shaft. The valve cover is arranged on the valve body. A valve core is provided on the valve shaft. The valve shaft is slidably connected to the valve cover, and a sealing ring is provided on the valve shaft. When the valve core is not in the valve body, the valve core abuts against the valve cover.

[0008] By adopting the above technical solution, when the valve core abuts against the valve cover, the sealing ring abuts against the valve cover, so that the gap between the valve core and the valve cover is abutted by the sealing ring. Thus, the sealing effect is increased by the abutment between the sealing ring and the valve cover, the medium is blocked by the sealing ring, and the medium cannot directly pass through the gap between the valve shaft and the valve cover, increasing the anti-permeation effect of the globe valve.

[0009] Optionally, a fixing ring is provided on the valve cover, a conical surface is provided on the sealing ring, and the distance between the conical surface and the fixing ring gradually increases along the direction from the sealing ring to the valve shaft, and the conical surface can abut against the fixing ring.

[0010] By adopting the above technical solution, the distance between the conical surface and the fixed ring gradually increases along the direction from the sealing ring to the valve shaft, enabling the conical surface to better fit the fixed ring, thereby making the contact between the fixed ring and the sealing ring more compact and further enhancing the sealing effect of the sealing ring; at the same time, the conical surface can abut against the fixed ring, reducing the possibility that the sealing ring is difficult to fit the valve cover due to processing problems and reducing the processing difficulty of the sealing ring.

[0011] Optionally, a fixing plate is provided on the valve body, a fixing hole for the fixing plate to pass through is opened on the valve cover, and a fixing strip is slidably connected to the fixing plate. When the fixing strip protrudes from the fixing plate, the valve cover and the valve body are fixed to each other.

[0012] By adopting the above technical solution, the staff passes the fixing plate through the fixing hole and then slides the fixing strip to make the fixing strip protrude from the fixing plate, so that the fixing strip cannot pass through the fixing hole, thereby limiting the valve cover with the fixing strip, making it unnecessary to use tools to screw bolts for fixing between the valve cover and the valve body, reducing the installation difficulty between the valve cover and the valve body, and enabling the staff to quickly install the valve body and the valve cover.

[0013] Optionally, a limiting sleeve is sleeved on the valve cover, a limiting spring is provided on the limiting sleeve, a limiting strip is provided on the limiting spring, and the limiting spring drives the limiting strip to push the fixing strip to protrude from the fixing plate. When the limiting sleeve is installed on the valve cover, the fixing strip protrudes from the fixing plate.

[0014] By adopting the above technical solution, the limiting spring drives the limiting strip to move, inserts the limiting strip into the fixing plate, and pushes the fixing strip to move, so that the fixing strip can protrude from the fixing plate, reducing the possibility of separation between the valve cover and the valve body caused by the shaking of the fixing strip; at the same time, the staff only needs to install the limiting sleeve to fix the fixing plate, insert the limiting strip into the fixing plate, and avoid the possibility of loosening between the valve cover and the valve body caused by the shaking of the fixing strip on the fixing plate.

[0015] Optionally, an elastic strip is provided on the limiting sleeve, an elastic hole is opened on the elastic strip, and a support rod for inserting into the elastic hole is provided on the valve body. When the support rod is inserted into the elastic hole, the limiting sleeve is sleeved on the valve cover and the valve body.

[0016] By adopting the above technical solution, by pulling the elastic strip, the support rod is inserted into the elastic hole, so as to realize the limit of the elastic strip by the support rod, so that the elastic strip can be stably fixed on the valve body, so that the limit sleeve can be stably sleeved on the valve cover and the valve body, and further the limit sleeve can stably limit the valve cover and the valve body, further increasing the fixing effect between the valve cover and the valve body, making the valve cover and the valve body more secure; at the same time, the limit spring can stably drive the limit strip to insert into the fixing plate, preventing the limit sleeve from shaking and causing the limit strip to fail to insert into the fixing plate, so that the limit strip can stably drive the fixing strip to protrude from the fixing plate.

[0017] Optionally, an installation groove for inserting the fixing plate is formed on the limit sleeve. When the fixing plate is inserted into the installation groove, the limit strip can push the fixing strip.

[0018] By adopting the above technical solution, by inserting the fixing plate into the installation groove, the groove wall of the installation groove limits the fixing plate, so that the fixing plate and the limit sleeve can be fixed to each other, and the limit strip on the limit sleeve can stably insert into the fixing plate, that is, the limit strip can stably push the fixing strip, further increasing the stability of the limit strip pushing the fixing strip.

[0019] Optionally, a through hole is formed on the limit sleeve, and an operating rod for passing through the through hole is provided on the limit strip, and the operating rod is used to drive the limit strip to disengage from the fixing plate.

[0020] By adopting the above technical solution, by arranging the operating rod on the limit strip, the staff can pull the operating rod, and let the operating rod move the limit strip in the direction of the limit spring, so that the limit strip disengages from the fixing plate, so as to realize that the limit strip does not move the fixing strip, so as to facilitate the staff to unlock the limit sleeve, so that the fixing strip can be completely located in the fixing plate, and the valve cover and the valve body can be disassembled.

[0021] Optionally, a clamping strip is rotatably connected to the operating rod. When the clamping strip protrudes from the operating rod, the clamping strip can abut against the limit sleeve, and at this time the limit strip does not abut against the fixing plate.

[0022] By adopting the above technical solution, the staff rotates the clamping strip to make the clamping strip protrude from the operating rod, and then releases the operating rod, and the limit spring drives the operating rod to move through the limit strip, so that the clamping strip abuts against the limit sleeve. At this time, the limit strip does not abut against the fixing plate, so that the staff can install or disassemble the limit sleeve without manually pulling the operating rod, reducing the installation or disassembly difficulty of the limit sleeve.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By making the valve core abut against the valve cover and the sealing ring also abut against the valve cover, the gap between the valve core and the valve cover is blocked by the sealing ring. Thus, the sealing effect is enhanced by the abutment between the sealing ring and the valve cover, preventing the medium from directly passing through the gap between the valve shaft and the valve cover and increasing the anti-permeation effect of the globe valve.

[0025] 2. By gradually increasing the distance between the conical surface and the fixing ring in the direction from the sealing ring to the valve shaft, the conical surface can better fit the fixing ring, making the contact between the fixing ring and the sealing ring more compact and further enhancing the sealing effect of the sealing ring. At the same time, the conical surface can abut against the fixing ring, reducing the possibility that the sealing ring is difficult to fit the valve cover due to processing problems and decreasing the processing difficulty of the sealing ring. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of Embodiment 1;

[0027] Figure 2 is an exploded schematic diagram highlighting the valve shaft in Embodiment 1;

[0028] Figure 3 is a schematic structural diagram highlighting the conical surface in Embodiment 1;

[0029] Figure 4 is a schematic structural diagram of Embodiment 2;

[0030] Figure 5 is along Figure 4 a partial cross-sectional view taken along line A-A in

[0031] Reference Numerals: 1, valve body; 11, fixing plate; 111, through hole; 12, fixing strip; 13, support rod; 2, valve cover; 21, bolt; 22, fixing hole; 3, valve shaft; 31, valve core; 32, sealing ring; 321, conical surface; 33, fixing ring; 4, limiting sleeve; 41, limiting plate; 411, installation groove; 42, limiting block; 421, through hole; 43, limiting spring; 431, limiting strip; 44, operating rod; 441, clamping hole; 442, clamping strip; 45, elastic strip; 451, elastic hole. Detailed Description of the Embodiments

[0032] The following further elaborates on this application Figures 1 - 5 with reference to the attached drawings.

[0033] Embodiment 1

[0034] This embodiment discloses an anti-permeation globe valve. Referring to Figure 1 , an anti-permeation globe valve includes a valve body 1, a valve cover 2 and a valve shaft 3. A plurality of bolts 21 are provided on the valve cover 2, and the bolts 21 are threadedly connected to the valve body 1 to fix the valve cover 2 and the valve body 1 to each other.

[0035] Refer to Figure 1 and Figure 2 , the valve shaft 3 is slidably connected to the valve cover 2, and a valve core 31 is integrally formed on the outer surface of the valve shaft 3. The valve core 31 is slidably connected to the valve body 1. By sliding the valve shaft 3, the valve core 31 can open or close the valve body 1.

[0036] Refer to Figure 2 and Figure 3 , a sealing ring 32 is integrally formed on the outer surface of the valve shaft 3, and a fixing ring 33 is integrally formed on the surface of the valve cover 2 facing the valve body 1. A conical surface 321 is formed on the surface of the sealing ring 32 facing the fixing ring 33, and the distance between the conical surface 321 and the fixing ring 33 gradually increases along the direction from the sealing ring 32 to the valve shaft 3. When the valve core 31 does not block the valve body 1, the conical surface 321 abuts against the fixing ring 33, so that the fixing ring 33 and the sealing ring 32 are attached, greatly reducing the possibility of the medium penetrating along the gap between the valve shaft 3 and the valve cover 2.

[0037] The implementation principle of Embodiment 1 is: when the valve core 31 does not block the valve body 1, the valve shaft 3 drives the sealing ring 32 to move, so that the sealing ring 32 abuts against the fixing ring 33, that is, the conical surface 321 abuts against the fixing ring 33.

[0038] Embodiment 2

[0039] Refer to Figure 4 and Figure 5 , the difference between this embodiment and Embodiment 1 is that two fixing plates 11 are fixedly connected to the valve body 1, through holes 111 are formed on the surfaces of the fixing plates 11, a fixing strip 12 is slidably connected in the through holes 111, and the fixing strip 12 can protrude from the fixing plates 11. Two fixing holes 22 are formed on the surface of the valve cover 2, and the fixing plates 11 pass through the fixing holes 22.

[0040] Refer to Figure 5 , the staff installs the valve cover 2 on the valve body 1, makes the fixing plate 11 pass through the fixing hole 22, and then slides the fixing strip 12 to make the fixing strip 12 protrude from the fixing plate 11. At this time, the fixing strip 12 abuts against the surface of the valve cover 2 away from the valve body 1, realizing the mutual fixation of the fixing plate 11 and the valve cover 2.

[0041] Refer to Figure 5 , a limiting sleeve 4 is provided on the valve cover 2. The limiting sleeve 4 has elasticity and can be sleeved on the valve cover 2 and the valve body 1. When the limiting sleeve 4 is installed on the valve cover 2, the valve body 1 and the valve cover 2 are located inside the limiting sleeve 4, and the limiting sleeve 4 fixes the valve cover 2 and the valve body 1.

[0042] Refer to Figure 5, a limiting plate 41 is fixedly connected to the surface of the limiting sleeve 4. The limiting plate 41 is located on the side of the valve cover 2 away from the valve body 1. An installation groove 411 for inserting the fixing plate 11 is formed on the surface of the limiting plate 41. When the limiting sleeve 4 is installed on the valve cover 2 and the valve body 1, the fixing plate 11 passes through the fixing hole 22 and is inserted into the installation groove 411 to realize the mutual limitation between the valve cover 2 and the limiting plate 41.

[0043] Refer to Figure 5 , a limiting block 42 is integrally formed on the limiting plate 41. A limiting spring 43 is fixedly connected to the surface of the limiting block 42. A limiting strip 431 is fixedly connected to the surface of the limiting spring 43 away from the limiting block 42. The limiting strip 431 can be inserted into the through hole 111. The limiting spring 43 drives the limiting strip 431 to be inserted into the through hole 111, that is, when the limiting strip 431 is inserted into the through hole 111, the limiting spring 43 is in a non-loaded state.

[0044] Refer to Figure 5 , a through hole 421 is formed on the surface of the limiting block 42. An operating rod 44 is integrally formed on the surface of the limiting strip 431 facing the limiting block 42. The limiting spring 43 is sleeved outside the operating rod 44. The operating rod 44 can pass through the through hole 421, and the limiting strip 431 cannot pass through the through hole 421. A clamping hole 441 is formed on the outer surface of the operating rod 44. A clamping strip 442 is rotatably connected in the clamping hole 441. The clamping strip 442 can protrude from the operating rod 44. When the clamping strip 442 and the operating rod 44 are perpendicular to each other, the clamping strip 442 cannot pass through the through hole 421, and at this time the limiting strip 431 cannot abut against the fixing plate 11.

[0045] Refer to Figure 5 , the staff pulls the operating rod 44, then rotates part of the clamping strip 442 out of the clamping hole 441, releases the hand, and allows the operating rod 44 to move in the direction of the limiting strip 431 by the acting force of the limiting spring 43 until the clamping strip 442 abuts against the side of the limiting block 42 away from the limiting sleeve 4. At this time, the limiting strip 431 does not abut against the fixing plate 11, so as to facilitate the staff to install or remove the limiting sleeve 4 on the valve cover 2.

[0046] Refer to Figure 5 , an elastic strip 45 is fixedly connected to the surface of the limiting sleeve 4 away from the limiting plate 41. The elastic strip 45 has elasticity. An elastic hole 451 is formed on the surface of the elastic strip 45. A support rod 13 is integrally formed on the surface of the valve body 1. The support rod 13 can be inserted into the elastic hole 451. When the support rod 13 is inserted into the elastic hole 451, one end of the limiting sleeve 4 can be fixed on the valve body 1.

[0047] The implementation principle of Embodiment 2 is as follows: The staff passes the fixing plate 11 through the fixing hole 22, then installs the limiting sleeve 4 on the valve cover 2 and the valve body 1. Pull the elastic strip 45 to make the support rod 13 pass through the elastic hole 451, and then pull the operating rod 44 and rotate the clamping strip 442 to make the clamping strip 442 not limit the operating rod 44, so that the limiting spring 43 drives the limiting strip 431 to insert into the fixing hole 22, and the limiting strip 431 pushes the fixing strip 12 to move, realizing the mutual fixation of the valve cover 2 and the valve body 1.

[0048] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The words "first", "second", "third" and similar terms used in the description and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "an" do not denote a quantity limitation either, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. "Upper", "lower", "left", "right", etc. are only used to indicate the relative position relationship, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0049] The above are only the preferred embodiments of this application and are not used to limit this application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of this application shall be included in the protection scope of this application.

Claims

1. An anti-permeation stop valve, comprising a valve body (1), a valve cover (2) and a valve shaft (3). The valve cover (2) is arranged on the valve body (1). A valve core (31) is provided on the valve shaft (3). The valve shaft (3) is slidably connected to the valve cover (2), and is characterized in that: A sealing ring (32) is provided on the valve shaft (3). When the valve core (31) is not in the valve body (1), the valve core (31) abuts against the valve cover (2).

2. The anti-permeation stop valve according to claim 1, characterized in that: A fixing ring (33) is provided on the valve cover (2). A conical surface (321) is provided on the sealing ring (32). The distance between the conical surface (321) and the fixing ring (33) gradually increases in the direction from the sealing ring (32) to the valve shaft (3). The conical surface (321) can abut against the fixing ring (33).

3. The anti-permeation stop valve according to claim 1, characterized in that: A fixing plate (11) is provided on the valve body (1). A fixing hole (22) for the fixing plate (11) to pass through is formed on the valve cover (2). A fixing bar (12) is slidably connected to the fixing plate (11). When the fixing bar (12) protrudes from the fixing plate (11), the valve cover (2) and the valve body (1) are fixed to each other.

4. The anti-seepage stop valve according to claim 3, characterized in that: A limiting sleeve (4) is sleeved on the valve cover (2). A limiting spring (43) is provided on the limiting sleeve (4). A limiting bar (431) is provided on the limiting spring (43). The limiting spring (43) drives the limiting bar (431) to push the fixing bar (12) to protrude from the fixing plate (11). When the limiting sleeve (4) is installed on the valve cover (2), the fixing bar (12) protrudes from the fixing plate (11).

5. The anti-permeation stop valve according to claim 4, wherein: An elastic strip (45) is provided on the limiting sleeve (4). An elastic hole (451) is formed on the elastic strip (45). A support rod (13) for inserting into the elastic hole (451) is provided on the valve body (1). When the support rod (13) is inserted into the elastic hole (451), the limiting sleeve (4) is sleeved on the valve cover (2) and the valve body (1).

6. The anti-permeation stop valve according to claim 4, wherein: An installation groove (411) for the fixing plate (11) to insert into is formed on the limiting sleeve (4). When the fixing plate (11) is inserted into the installation groove (411), the limiting bar (431) can push the fixing bar (12).

7. The anti-permeation stop valve according to claim 4, wherein: A through hole (421) is formed on the limiting sleeve (4). An operating rod (44) for passing through the through hole (421) is provided on the limiting bar (431). The operating rod (44) is used to drive the limiting bar (431) to disengage from the fixing plate (11).

8. The anti-permeation stop valve according to claim 7, characterized in that: A clamping bar (442) is rotatably connected to the operating rod (44). When the clamping bar (442) protrudes from the operating rod (44), the clamping bar (442) can abut against the limiting sleeve (4). At this time, the limiting bar (431) does not abut against the fixing plate (11).

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