CN216519725U - Low temperature ball valve seal structure - Google Patents
Low temperature ball valve seal structure Download PDFInfo
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- CN216519725U CN216519725U CN202123360962.2U CN202123360962U CN216519725U CN 216519725 U CN216519725 U CN 216519725U CN 202123360962 U CN202123360962 U CN 202123360962U CN 216519725 U CN216519725 U CN 216519725U
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Abstract
The application relates to a low temperature ball valve seal structure, include: the valve comprises a valve body, a valve cover, a ball body, a first valve seat assembly and a second valve seat assembly; the valve cover is detachably arranged at an opening at one side of the valve body; the ball body is rotatably arranged in the valve body; a first mounting groove is formed in one side, facing the valve cover, of the valve body, and a winding gasket is placed in the first mounting groove; a second mounting groove is circumferentially formed in the inner wall of the valve body, and a third mounting groove is circumferentially formed in the inner wall of the valve cover; the first valve seat assembly is arranged at the second mounting groove, and a first sealing element and a second sealing element are sleeved on the outer wall of the first valve seat assembly; the second valve holder subassembly is installed in third mounting groove department, and the cover is equipped with the third sealing member on the outer wall of second valve holder subassembly, and the outer wall of third sealing member is laminated with the inner wall of third mounting groove mutually. Through set up the winding gasket between valve body and valve gap, first valve holder subassembly department sets up first sealing member, and second valve holder subassembly department sets up the second sealing member and has strengthened sealed effect.
Description
Technical Field
The application relates to the field of valves, especially relates to a low temperature ball valve seal structure.
Background
The ball valve, the opening and closing piece (ball) is driven by the valve rod and rotates around the axis of the ball valve. The hard seal V-shaped ball valve can also be used for regulating and controlling fluid, wherein a V-shaped ball core of the hard seal V-shaped ball valve and a metal valve seat of the build-up welding hard alloy have strong shearing force, and the hard seal V-shaped ball valve is particularly suitable for media containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the switching of the flow direction of the medium on the pipeline, and can close any channel to connect the other two channels.
The valve seat of the ball body is of a metal piston structure, and the sealing between the metal valve seat and the valve body is usually realized by adopting an O-shaped ring or a lip-shaped ring, but the sealing performance of the existing structure is insufficient.
Disclosure of Invention
In view of this, the present application provides a low temperature ball valve sealing structure, which enhances the sealing effect by providing a winding gasket between a valve body and a valve cover, a first sealing member at a first valve seat assembly, and a second sealing member at a second valve seat assembly.
According to an aspect of the present application, there is provided a low temperature ball valve sealing structure, comprising:
the valve comprises a valve body, a valve cover, a ball body, a first valve seat assembly and a second valve seat assembly;
the valve cover is detachably arranged at an opening at one side of the valve body; the ball body is rotatably arranged inside the valve body;
a first mounting groove is formed in one side, facing the valve cover, of the valve body, the first mounting groove is circumferentially arranged around an opening of the valve body, a winding gasket is placed in the first mounting groove, and the winding gasket is abutted to the valve cover;
a second mounting groove is formed in the inner wall of the valve body in the circumferential direction, and a third mounting groove is formed in the inner wall of the valve cover in the circumferential direction;
the first valve seat assembly is installed at the second installation groove, one side, facing the ball body, of the first valve seat assembly is matched with the ball body, a first sealing element and a second sealing element are sleeved on the outer wall of the first valve seat assembly, and the outer walls of the first sealing element and the second sealing element are attached to the inner wall of the second installation groove;
the second valve seat assembly is installed at the third installation groove, faces one side of the ball body and is matched with the ball body, a third sealing element is sleeved on the outer wall of the second valve seat assembly, and the outer wall of the third sealing element is attached to the inner wall of the third installation groove.
In one possible implementation, the first seat assembly includes a first support ring and a first seat body, and the second seat assembly includes a second support ring and a second seat body;
the first support ring is arranged at the second mounting groove, a first placing groove is formed in the side wall of one side, facing the sphere, of the first support ring, the first valve seat body is matched with the first placing groove, and the first valve seat body is matched with the sphere;
the first sealing element and the second sealing element are sleeved on the outer wall of the first supporting ring;
the second support ring is arranged at the third mounting groove and matched with the third mounting groove, a second placing groove is formed in the side wall, facing the sphere, of the second support ring, the second valve seat body is matched with the second placing groove, and the first valve seat body is matched with the sphere;
the third sealing element is sleeved on the outer wall of the second support ring.
In a possible implementation manner, a fourth mounting groove is formed in the outer wall of the second support ring, and the fourth mounting groove is circumferentially arranged around the outer wall of the second support ring;
the third sealing element is sleeved at the fourth mounting groove.
In a possible implementation manner, the outer wall of the first support ring is arranged in a step shape, and the shape of the second mounting groove is matched with the shape of the first support ring;
a preset distance is reserved between the ladder surface of the corresponding first supporting ring and the groove surface of the second mounting groove;
the second mounting groove is provided with more than two first groove bodies facing the groove surface of the first support ring, first elastic pieces are placed at the more than two first groove bodies, and the first elastic pieces are abutted to the step surface of the first support ring;
the structure of the second support ring is the same as that of the first support ring;
the shape of the third mounting groove is matched with that of the second support ring;
a preset distance is reserved between the ladder surface of the corresponding second support ring and the groove surface of the third mounting groove;
the third mounting groove faces the groove face of the second support ring, more than two second groove bodies are formed in the groove face of the second support ring, second elastic pieces are placed at the second groove bodies, and the second elastic pieces are abutted to the step face of the second support ring.
In one possible implementation, the valve further comprises a first valve rod and a second valve rod;
the first valve rod penetrates through the side wall of the top of the valve body and is fixedly connected with the top of the ball body, and the second valve rod penetrates through the side wall of the bottom of the valve body and is fixedly connected with the bottom of the ball body.
In a possible implementation manner, the valve further comprises an upper sleeve cover, and the upper sleeve cover is sleeved on the first valve rod;
the outer wall of the upper sleeve cover is provided with a bulge, the bulge is circumferentially arranged around the outer wall of the upper sleeve cover, and the bulge is abutted against the top of the valve body;
an upper cover sealing groove is formed in the top of the valve body and surrounds the first valve rod in the circumferential direction, the upper cover sealing groove is opposite to the boss, an upper cover sealing ring is placed in the upper cover sealing groove, and the upper cover sealing ring is abutted to the boss.
In a possible implementation manner, the device further comprises a lower cover body;
the lower cover body is fixed at the bottom of the valve body and covers the second valve rod;
the bottom of valve body with set up the lower cover seal groove on the relative one side of lower cover body, the lower cover seal groove is around second valve stem circumference is seted up, lower cover sealing washer is installed to lower cover seal groove department, the lower cover sealing washer with the lower cover body butt sets up.
In a possible implementation manner, a first groove is formed in one end, facing the sphere, of the first valve rod, and a second groove is formed in one end, facing the sphere, of the second valve rod;
a first spring is arranged in the first groove, a first anti-static ball is arranged at one end, facing the ball body, of the first spring, and the first anti-static ball is abutted to the ball body;
install the second spring in the second installation, the second spring orientation spheroidal one end is equipped with the second and prevents the static ball, the second prevent the static ball with the spheroid butt sets up.
In a possible implementation manner, a first slot is formed at the top of the ball body, and the first slot is matched with the first valve rod;
and a second slot is formed in the bottom of the ball body and matched with the second valve rod.
In one possible implementation, the first seal, the second seal, and the third seal are lip seals.
When the low-temperature ball valve sealing structure is in an opening state, the axis of the circulation hole in the ball body is overlapped with the circumferential direction of the inner wall cavity of the valve body, so that the circulation hole communicates with the circulation passage, and fluid can flow. When the low-temperature ball valve sealing structure is in a closed state, the axis of the circulation hole is overlapped with the axis of the valve body. And a first valve seat assembly and a second valve seat assembly are respectively arranged on two sides of the ball body, so that a sealing pair is formed. The first sealing element and the second sealing element are sleeved on the first valve seat assembly, and the third sealing element is sleeved on the second valve seat assembly, so that the sealing performance of the embodiment of the application can be improved. When fluid passes through the ball body, the third sealing element can play a sealing role, and the first sealing element and the second sealing element also play a double sealing role, so that the first sealing element and the second sealing element at the first valve seat assembly can still keep a sealing state even if the outlet of the second valve seat assembly is damaged. And the valve body and the valve cover are sealed through the wound gasket, so that the sealing effect between the valve body and the valve cover is further ensured. To sum up, low temperature ball valve seal structure of this application embodiment sets up first sealing member through setting up the winding gasket between valve body and valve gap, and first valve seat subassembly department sets up the second sealing member and has strengthened sealed effect second valve seat subassembly department.
Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.
Fig. 1 is a main body structure view showing a sealing structure of a cryogenic ball valve according to an embodiment of the present application;
fig. 2 shows a partial view of a cryogenic ball valve seal structure of an embodiment of the present application.
Detailed Description
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It will be understood that, the terms "central," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate the description of the present invention or to facilitate the description thereof, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
Fig. 1 shows a main body structure diagram of a low-temperature ball valve sealing structure according to an embodiment of the present application. Fig. 2 shows a partial view of a cryogenic ball valve seal structure of an embodiment of the present application. As shown in fig. 1 or 2, the sealing structure of the cryogenic ball valve includes: the valve comprises a valve body 100, a valve cover 200, a ball 300, a first valve seat assembly 400 and a second valve seat assembly 500, wherein the valve cover 200 is detachably installed at one side opening of the valve body 100, and a flow passage is formed by an internal cavity of the valve body 100 and an internal cavity of the valve cover 200. First mounting groove has been seted up towards one side of valve gap 200 to valve body 100, and first mounting groove sets up around the opening circumference of valve body 100, has placed winding gasket 600 in the first mounting groove, and winding gasket 600 sets up with valve gap 200 butt. The ball 300 is rotatably installed inside the valve body 100, the ball 300 is disposed at a side of the valve body 100 adjacent to the bonnet 200, and the ball 300 is opened with a flow hole for fluid to flow through. The second mounting groove has been seted up on the inner wall of valve body 100, and the third mounting groove has been seted up on the inner wall of valve gap 200, and second mounting groove and third mounting groove are located the both sides of the relative setting of ball valve respectively, and the second mounting groove sets up around the inner wall circumference of valve body 100, and the third mounting groove sets up around the inner wall circumference of valve gap 200. First valve seat assembly 400 is installed in second mounting groove department, and first valve seat assembly 400 is equipped with first sealing member 700 and second sealing member 800 towards one side and spheroid 300 phase-match of spheroid 300 on the outer wall of first valve seat assembly 400, and the outer wall of first sealing member 700, the outer wall of second sealing member 800 all laminate mutually with the inner wall of second mounting groove. Second valve holder assembly 500 is installed in third mounting groove department, and second valve holder assembly 500 is equipped with third sealing member 900 towards one side and spheroid 300 phase-match of spheroid 300 on the outer wall of second valve holder assembly 500, and the outer wall of third sealing member 900 is laminated mutually with the inner wall of third mounting groove.
When the low-temperature ball valve sealing structure is in an open state, the axis of the circulation hole in the ball 300 is overlapped with the circumferential direction of the inner wall cavity of the valve body 100, so that the circulation passage is communicated with the circulation hole, and fluid can flow. When the low-temperature ball valve sealing structure is in a closed state, the axis of the flow hole and the axis of the valve body 100 are overlapped. The ball 300 is provided at both sides thereof with the first and second seat assemblies 400 and 500, respectively, thereby constituting a sealing pair. The first and second sealing members 700 and 800 are installed on the first seat assembly 400, and the third sealing member 900 is installed on the second seat assembly 500, thereby increasing the sealing performance of the embodiment of the present application. The third sealing member 900 can perform a sealing function when the fluid passes through the ball 300, and the first sealing member 700 and the second sealing member 800 also perform a double sealing function, so that the first sealing member 700 and the second sealing member 800 at the first seat assembly 400 can maintain a sealed state even if the outlet of the second seat assembly 500 is damaged. And the valve body 100 and the bonnet 200 are sealed by the winding gasket 600, so that the sealing effect between the valve body 100 and the bonnet 200 is further ensured. In summary, the low-temperature ball valve sealing structure according to the embodiment of the present application enhances the sealing effect by providing the winding gasket 600 between the valve body 100 and the valve cover 200, the first sealing member 700 at the first valve seat assembly 400, and the second sealing member 800 at the second valve seat assembly 500.
In a possible implementation manner, the first seat assembly 400 includes a first support ring 410 and a first seat body 420, the second seat assembly 500 includes a second support ring 510 and a second seat body 520, the first support ring 410 is installed at the second installation groove, a first placing groove is opened on a side wall of the first support ring 410 facing the sphere 300, the first seat body 420 matches with the first placing groove, and the first seat body 420 matches with the sphere 300. The first sealing member 700 and the second sealing member 800 are fitted over the outer wall of the first support ring 410. The second support ring 510 is installed at the third installation groove, the second support ring 510 is matched with the third installation groove, a second placing groove is opened on a side wall of the second support ring 510 facing the sphere 300, the second valve seat body 520 is matched with the second placing groove, and the first valve seat body 420 is matched with the sphere 300. The third sealing member 900 is fitted over the outer wall of the second support ring 510. Therefore, the structure of the embodiment of the application is further optimized.
Furthermore, in a possible implementation manner, a fourth installation groove is formed in an outer wall of the second support ring 510, the fourth installation groove is circumferentially arranged around the outer wall of the second support ring 510, and the third sealing element 900 is sleeved at the fourth installation groove. Therefore, the structure of the embodiment of the application is further optimized.
Further, in a possible implementation manner, the outer wall of the first supporting ring 410 is arranged in a step shape, the shape of the second mounting groove is matched with the shape of the first supporting ring 410, and a preset distance is provided between the step surface 411 of the corresponding first supporting ring 410 and the groove surface 110 of the second mounting groove. More than two first cell bodies have been seted up towards on the cell surface 110 of first supporting ring 410 to the second mounting groove, and first elastic component 1070 has all been placed to more than two first cell bodies department, and first elastic component 1070 sets up with the tread 411 butt of first supporting ring 410. The second support ring 510 has the same structure as the first support ring 410, and the third mounting groove has a shape matched with the second support ring 510. A preset distance is provided between the step surface 411 of the corresponding second support ring 510 and the groove surface 110 of the third mounting groove. The third mounting groove has seted up more than two second cell bodies towards on the cell face 110 of second lock ring 510, and second elastic component 1080 has all been placed to more than two second cell bodies department, and second elastic component 1080 and the tread 411 butt setting of second lock ring 510.
In a possible implementation manner, the ball valve further comprises a first valve rod 1010 and a second valve rod 1020, the first valve rod 1010 penetrates through the top side wall of the valve body 100 to be fixedly connected with the top of the ball 300, and the second valve rod 1020 penetrates through the bottom side wall of the valve body 100 to be fixedly connected with the bottom of the ball 300.
Furthermore, in a possible implementation manner, the valve further includes an upper cover cap 1030, the upper cover cap 1030 is sleeved on the first valve rod 1010, a protruding portion is arranged on an outer wall of the upper cover cap 1030, the protruding portion is circumferentially arranged around the outer wall of the upper cover cap 1030, and the protruding portion is abutted to the top of the valve body 100. An upper cover sealing groove is formed in the top of the valve body 100, the upper cover sealing groove is circumferentially arranged around the first valve rod 1010, the upper cover sealing groove is opposite to the boss, an upper cover sealing ring 1050 is placed in the upper cover sealing groove, and the upper cover sealing ring 1050 is abutted to the boss. Thereby, the sealing performance of the embodiment of the application is further enhanced.
Here, it should be noted that, in one possible implementation, the upper cover cap 1030 has a hollow cylindrical shape.
Here, it should also be noted that, in one possible implementation, the inner portion of the upper cover 1030 is opened with a sleeve groove, the sleeve groove is circumferentially disposed around the inner wall of the upper cover 1030, and the sleeve groove is disposed on the side of the upper cover 1030 facing the sphere 300. The upper shaft sleeve is arranged in the sleeve groove, and the upper shaft sleeve is sleeved with the first valve rod 1010.
In one possible implementation, the valve further includes a lower cover 1040, the lower cover 1040 is fixed to the bottom of the valve body 100, and the lower cover 1040 covers the second valve stem 1020. A lower cover sealing groove is formed in the bottom of the valve body 100 on the side opposite to the lower cover body 1040, the lower cover sealing groove is formed circumferentially around the second valve stem 1020, a lower cover sealing ring 1060 is mounted in the lower cover sealing groove, and the lower cover sealing ring 1060 is abutted to the lower cover body 1040. Thereby, the sealing performance of the embodiment of the application is further enhanced.
In one possible implementation, the first valve shaft 1010 opens with a first groove at an end facing the ball 300, and the second valve shaft 1020 opens with a second groove at an end facing the ball 300. A first spring 1090 is installed in the first groove, a first anti-static ball 2010 is arranged at one end, facing the sphere 300, of the first spring 1090, and the first anti-static ball 2010 is abutted to the sphere 300. Second spring 2020 is mounted in the second mounting, second antistatic ball 2030 is provided at one end of second spring 2020 facing spherical body 300, and second antistatic ball 2030 is provided in contact with spherical body 300.
In one possible implementation, the top of the sphere 300 is formed with a first slot, the first slot is matched with the first valve stem 1010, and the bottom of the sphere 300 is formed with a second slot, the second slot is matched with the second valve stem 1020.
Further, in one possible implementation, the first seal 700, the second seal 800, and the third seal 900 are lip seals.
The low-temperature ball valve sealing structure of the embodiment of the application comprises a valve body 100, a valve cover 200, a ball 300, a first supporting ring 410, a second supporting ring 510, a first valve seat body 420, a second valve seat body 520, an upper sleeve cover 1030, a lower cover body 1040, a first sealing member 700, a second sealing member 800, a third sealing member 900, a first valve rod 1010 and a second valve rod 1020, wherein the valve cover 200 is detachably mounted at an opening on one side of the valve body 100, and a flow passage is formed between an internal cavity of the valve body 100 and an internal cavity of the valve cover 200. First mounting groove has been seted up towards one side of valve gap 200 to valve body 100, and first mounting groove sets up around the opening circumference of valve body 100, has placed winding gasket 600 in the first mounting groove, and winding gasket 600 sets up with valve gap 200 butt. The ball 300 is rotatably installed inside the valve body 100, the ball 300 is disposed at a side of the valve body 100 adjacent to the bonnet 200, and the ball 300 is opened with a flow hole for fluid to flow through. The first valve stem 1010 penetrates through the top side wall of the valve body 100 and is fixedly connected with the top of the sphere 300, and the second valve stem 1020 penetrates through the bottom side wall of the valve body 100 and is fixedly connected with the bottom of the sphere 300. Go up the upper cover 1030 and establish on first valve rod 1010, be equipped with the bellying on the outer wall of upper cover 1030, the bellying sets up around the outer wall circumference of upper cover 1030, and the bellying sets up with the top butt of valve body 100. An upper cover sealing groove is formed in the top of the valve body 100, the upper cover sealing groove is circumferentially arranged around the first valve rod 1010, the upper cover sealing groove is opposite to the boss, an upper cover sealing ring 1050 is placed in the upper cover sealing groove, and the upper cover sealing ring 1050 is abutted to the boss. The lower cover 1040 is fixed to the bottom of the valve body 100, and the second stem 1020 is provided to the lower cover 1040. A lower cover sealing groove is formed in the bottom of the valve body 100 on the side opposite to the lower cover body 1040, the lower cover sealing groove is formed circumferentially around the second valve stem 1020, a lower cover sealing ring 1060 is mounted in the lower cover sealing groove, and the lower cover sealing ring 1060 is abutted to the lower cover body 1040. The first valve shaft 1010 has a first recess formed at an end facing the ball 300, and the second valve shaft 1020 has a second recess formed at an end facing the ball 300. A first spring 1090 is installed in the first groove, a first anti-static ball 2010 is arranged at one end, facing the sphere 300, of the first spring 1090, and the first anti-static ball 2010 is abutted to the sphere 300. Second spring 2020 is mounted in the second mounting, second antistatic ball 2030 is provided at one end of second spring 2020 facing spherical body 300, and second antistatic ball 2030 is provided in contact with spherical body 300. The second mounting groove has been seted up on the inner wall of valve body 100, and the third mounting groove has been seted up on the inner wall of valve gap 200, and second mounting groove and third mounting groove are located the both sides of the relative setting of ball valve respectively, and the second mounting groove sets up around the inner wall circumference of valve body 100, and the third mounting groove sets up around the inner wall circumference of valve gap 200. The first supporting ring 410 is installed at the second installation groove, a first placing groove is formed in the side wall of the first supporting ring 410 facing the sphere 300, the first valve seat body 420 is matched with the first placing groove, and the first valve seat body 420 is matched with the sphere 300. The first sealing member 700 and the second sealing member 800 are fitted over the outer wall of the first support ring 410. The second support ring 510 is installed at the third installation groove, the second support ring 510 is matched with the third installation groove, a second placing groove is opened on a side wall of the second support ring 510 facing the sphere 300, the second valve seat body 520 is matched with the second placing groove, and the first valve seat body 420 is matched with the sphere 300. The third sealing member 900 is fitted over the outer wall of the second support ring 510. The outer wall of the first supporting ring 410 is disposed in a step shape, the shape of the second mounting groove matches the shape of the first supporting ring 410, and a predetermined distance is provided between the step surface 411 of the corresponding first supporting ring 410 and the groove surface 110 of the second mounting groove. More than two first cell bodies have been seted up towards on the cell surface 110 of first supporting ring 410 to the second mounting groove, and first elastic component 1070 has all been placed to more than two first cell bodies department, and first elastic component 1070 sets up with the tread 411 butt of first supporting ring 410. The second support ring 510 has the same structure as the first support ring 410, and the third mounting groove has a shape matched with the second support ring 510. A preset distance is provided between the step surface 411 of the corresponding second support ring 510 and the groove surface 110 of the third mounting groove. The third mounting groove has seted up more than two second cell bodies towards on the cell face 110 of second lock ring 510, and second elastic component 1080 has all been placed to more than two second cell bodies department, and second elastic component 1080 and the tread 411 butt setting of second lock ring 510. Therefore, in the embodiment of the present application, the first sealing member 700 and the second sealing member 800 are disposed at the first support ring 410, the third sealing ring is disposed at the second support ring 510, the winding gasket 600 is disposed at the valve body 100 and the bonnet 200, the upper cover sealing ring 1050 is disposed at the upper cover cap 1030, and the lower cover sealing ring 1060 is disposed at the lower cover body 1040, thereby completing the sealing structure.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A cryogenic ball valve seal structure, comprising:
the valve comprises a valve body, a valve cover, a ball body, a first valve seat assembly and a second valve seat assembly;
the valve cover is detachably arranged at an opening at one side of the valve body; the ball body is rotatably arranged inside the valve body;
a first mounting groove is formed in one side, facing the valve cover, of the valve body, the first mounting groove is circumferentially arranged around an opening of the valve body, a winding gasket is placed in the first mounting groove, and the winding gasket is abutted to the valve cover;
a second mounting groove is formed in the inner wall of the valve body in the circumferential direction, and a third mounting groove is formed in the inner wall of the valve cover in the circumferential direction;
the first valve seat assembly is installed at the second installation groove, one side, facing the ball body, of the first valve seat assembly is matched with the ball body, a first sealing element and a second sealing element are sleeved on the outer wall of the first valve seat assembly, and the outer walls of the first sealing element and the second sealing element are attached to the inner wall of the second installation groove;
the second valve seat assembly is installed at the third installation groove, faces one side of the ball body and is matched with the ball body, a third sealing element is sleeved on the outer wall of the second valve seat assembly, and the outer wall of the third sealing element is attached to the inner wall of the third installation groove.
2. The cryogenic ball valve seal structure of claim 1, wherein the first seat assembly comprises a first support ring and a first seat body, and the second seat assembly comprises a second support ring and a second seat body;
the first support ring is arranged at the second mounting groove, a first placing groove is formed in the side wall of one side, facing the sphere, of the first support ring, the first valve seat body is matched with the first placing groove, and the first valve seat body is matched with the sphere;
the first sealing element and the second sealing element are sleeved on the outer wall of the first supporting ring;
the second support ring is arranged at the third mounting groove and matched with the third mounting groove, a second placing groove is formed in the side wall, facing the sphere, of the second support ring, the second valve seat body is matched with the second placing groove, and the first valve seat body is matched with the sphere;
the third sealing element is sleeved on the outer wall of the second support ring.
3. The sealing structure of a cryogenic ball valve according to claim 2, wherein a fourth mounting groove is formed in the outer wall of the second support ring, and the fourth mounting groove is circumferentially arranged around the outer wall of the second support ring;
the third sealing element is sleeved at the fourth mounting groove.
4. The structure of claim 2, wherein the outer wall of the first support ring is arranged in a step shape, and the shape of the second mounting groove matches the shape of the first support ring;
a preset distance is reserved between the ladder surface of the corresponding first supporting ring and the groove surface of the second mounting groove;
the second mounting groove is provided with more than two first groove bodies facing the groove surface of the first support ring, first elastic pieces are placed at the more than two first groove bodies, and the first elastic pieces are abutted to the step surface of the first support ring;
the structure of the second support ring is the same as that of the first support ring;
the shape of the third mounting groove is matched with that of the second support ring;
a preset distance is reserved between the ladder surface of the corresponding second support ring and the groove surface of the third mounting groove;
the third mounting groove faces the groove face of the second support ring, more than two second groove bodies are formed in the groove face of the second support ring, second elastic pieces are placed at the second groove bodies, and the second elastic pieces are abutted to the step face of the second support ring.
5. The cryogenic ball valve sealing structure of claim 1, further comprising a first valve stem and a second valve stem;
the first valve rod penetrates through the side wall of the top of the valve body and is fixedly connected with the top of the ball body, and the second valve rod penetrates through the side wall of the bottom of the valve body and is fixedly connected with the bottom of the ball body.
6. The cryogenic ball valve sealing structure of claim 5, further comprising an upper sleeve cover, wherein the upper sleeve cover is sleeved on the first valve rod;
the outer wall of the upper sleeve cover is provided with a bulge, the bulge is circumferentially arranged around the outer wall of the upper sleeve cover, and the bulge is abutted against the top of the valve body;
an upper cover sealing groove is formed in the top of the valve body and surrounds the first valve rod in the circumferential direction, the upper cover sealing groove is opposite to the boss, an upper cover sealing ring is placed in the upper cover sealing groove, and the upper cover sealing ring is abutted to the boss.
7. The cryogenic ball valve sealing structure of claim 5, further comprising a lower cover body;
the lower cover body is fixed at the bottom of the valve body and covers the second valve rod;
the bottom of valve body with set up the lower cover seal groove on the relative one side of lower cover body, the lower cover seal groove is around second valve stem circumference is seted up, lower cover sealing washer is installed to lower cover seal groove department, the lower cover sealing washer with the lower cover body butt sets up.
8. The structure of claim 5, wherein the first valve stem defines a first groove toward an end of the ball, and the second valve stem defines a second groove toward an end of the ball;
a first spring is arranged in the first groove, a first anti-static ball is arranged at one end, facing the ball body, of the first spring, and the first anti-static ball is abutted to the ball body;
install the second spring in the second installation, the second spring orientation spheroidal one end is equipped with the second and prevents the static ball, the second prevent the static ball with the spheroid butt sets up.
9. The structure of claim 5, wherein a first slot is defined in a top of the ball, the first slot being adapted to mate with the first valve stem;
and a second slot is formed in the bottom of the ball body, and the second slot is matched with the second valve rod.
10. The cryogenic ball valve seal structure of any one of claims 1 to 9, wherein the first, second and third seals are lip seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123360962.2U CN216519725U (en) | 2021-12-28 | 2021-12-28 | Low temperature ball valve seal structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123360962.2U CN216519725U (en) | 2021-12-28 | 2021-12-28 | Low temperature ball valve seal structure |
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| CN216519725U true CN216519725U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123360962.2U Active CN216519725U (en) | 2021-12-28 | 2021-12-28 | Low temperature ball valve seal structure |
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| Country | Link |
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| CN (1) | CN216519725U (en) |
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