CN213839648U - Middle-cavity self-discharging low-temperature ball valve - Google Patents
Middle-cavity self-discharging low-temperature ball valve Download PDFInfo
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- CN213839648U CN213839648U CN202022786774.5U CN202022786774U CN213839648U CN 213839648 U CN213839648 U CN 213839648U CN 202022786774 U CN202022786774 U CN 202022786774U CN 213839648 U CN213839648 U CN 213839648U
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Abstract
The utility model discloses a lumen is from release low temperature ball valve, including the valve body, arrange the spheroid in the spheroid installation cavity of valve body in, one end insert in the spheroid installation cavity and with spheroid coaxial coupling's valve rod and fix the valve gap on the valve rod on valve body upper end and cover, insert in the spheroid installation cavity behind the central point evagination of valve gap bottom, be provided with the pressure release passageway in the bottom of valve rod, the one end downwardly extending of pressure release passageway and with the fluid passage intercommunication on the spheroid, run through behind the valve rod lateral wall its other end one side at valve gap evagination position with spheroid installation cavity intercommunication. When the low-temperature medium in the ball installation cavity is heated and vaporized, the pressure in the ball installation cavity is increased sharply and is higher than the medium pressure in the fluid channel of the ball valve, the high-pressure medium in the ball installation cavity is decompressed to the environment with lower pressure in the fluid channel through the decompression channel, so that the pressure in the ball installation cavity is reduced, and the ball is prevented from being dangerous due to overpressure of the ball installation cavity.
Description
Technical Field
The utility model relates to a ball valve field, concretely relates to lumen is from release low temperature ball valve.
Background
A ball valve is a valve that is used mainly in a pipeline to shut off, distribute, and change the flow direction of a medium. Ball valves are widely used in petroleum refining, natural gas transportation, paper making, pharmacy, water conservancy, electric power, municipal administration, steel and other industries. The mechanism has the action of rotating 90 degrees, and the closing tightness can be closed only by the operation of rotating 90 degrees and a small rotating moment. The ball valve comprises a valve body, a ball body, a valve rod and a valve cover, wherein the ball body is arranged in a ball body mounting cavity of the valve body, is in sealing fit with the valve body through a valve seat assembly and is provided with a circular channel, one end of the ball body is inserted into the ball body mounting cavity and is coaxially connected with the ball body, the valve cover is fixed at the upper end of the valve body and is sleeved on the valve rod, the ball body is in clearance fit with the ball body mounting cavity, and the bottom of the valve rod is matched with an inner hole of the valve cover through a plurality of gaskets.
Ball valves may be used in cryogenic environments, such as in pipelines for liquefied natural gas. In the opening and closing process of the ball valve, a valve body flow passage is communicated with a ball body installation cavity used for installing a ball body on the valve body through a passage on the ball body, and at the moment, fluid in the valve body flow passage enters the ball body installation cavity; in subsequent operation, when the ball valve is communicated with the valve body flow passage, the ball body installation cavity is a closed space, one side of the ball body installation cavity is isolated from the flow passage on the valve body due to the sealing effect of the valve seat assembly, and the other side of the ball body installation cavity is isolated from the matching gap between the valve rod and the valve rod due to the effects of a sealing ring and the like between the valve rod and the bottom of the valve cover. The lower the temperature of the cryogenic fluid which is farther away from the flow channel is, the higher the temperature is, the easier the vaporization is; after the low-temperature liquid is vaporized, the pressure of the ball mounting cavity can be increased sharply, and if the pressure relief function is not provided, the ball valve can be dangerous due to the overpressure of the ball mounting cavity.
For this purpose, a corresponding pressure relief structure needs to be provided on the ball valve. In the low-temperature ball valve disclosed in the prior art CN101761661A, although the high-pressure fluid in the ball mounting cavity can be discharged after going upward through the fit gap between the valve rod and the valve cover, the fluid is directly decompressed in the atmosphere, and is not suitable for the use of flammable, toxic and other media; in the low-temperature ball valve disclosed in CN102818043B in the prior art, although the high-pressure medium in the ball mounting cavity goes upward through the gasket between the bottom of the valve rod and the cover to the fitting gap between the valve rod and the valve cover, the high-pressure medium is released through the pressure release hole communicating with the fitting gap and the channel inside the ball, so that the high-pressure medium in the ball mounting cavity is released to the flow channel with lower pressure. However, when the pressure relief structure is used for pressure relief, a high-pressure medium in the installation cavity needs to pass through the small gasket between the bottom of the valve rod and the valve cover, and the fit clearance between the inner ring and the valve rod and between the outer ring and the valve cover is extremely small, so that the fit clearance at the inner ring and the outer ring of the gasket is extremely easy to block due to particles in the medium, and the pressure relief action cannot be performed. Therefore, the ball valve has no pressure relief function, and the ball mounting cavity is in danger due to overpressure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides a middle chamber is from release low temperature ball valve, has solved because of there being the granule jam in the pressure release clearance little and exist by the medium among the pressure release structure of current spheroid installation cavity, the problem of unable pressure release.
The utility model adopts the technical scheme as follows:
the utility model provides a middle chamber is from release low temperature ball valve, includes the valve body, arrange the spheroid installation cavity of valve body in and through valve seat subassembly and the sealed complex spheroid of valve body, one end insert in the spheroid installation cavity and with spheroid coaxial coupling's valve rod and fix valve gap on the valve body upper end and cover establish on the valve rod, insert in the spheroid installation cavity behind the central point portion evagination of valve gap bottom the bottom of valve rod is provided with the pressure release passageway, the one end downwardly extending of pressure release passageway and with the fluid passage intercommunication on the spheroid, its other end wear out behind the valve rod lateral wall run through behind the one side at valve gap evagination position with spheroid installation cavity intercommunication.
Furthermore, the pressure relief channel comprises a first channel located on one side of the convex part of the valve cover, a second channel located on the radial direction of the valve rod, a third channel located on the axial direction of the valve rod and a fourth channel located on the sphere, which are sequentially communicated, one end of the first channel and one end of the second channel are mutually communicated through a fit clearance between the valve rod and the valve cover, the other end of the first channel is communicated with the sphere installation cavity, and one end of the fourth channel, which is far away from the third channel, is communicated with the fluid channel on the sphere.
Further, be located the upstream runner of valve body with the outer periphery of disk seat subassembly passes through the one-way sealed cooperation of the upstream runner on spring energy storage circle and the valve body, spring energy storage circle includes annular coil spring and the C type cover of cover on coil spring, the opening of C type cover is towards the upper reaches, and its inside and outside circle is laminated with disk seat subassembly and valve body respectively.
Furthermore, a ring body is sleeved on the valve seat assembly and located on the upstream side of the spring energy storage ring, the inner ring and the outer ring of the ring body are respectively attached to the valve seat assembly and the valve body, one side, close to the spring energy storage ring, of the ring body protrudes outwards to form a limiting ring, and one side, far away from the ring body, of the limiting ring is inserted into an opening of the C-shaped sleeve.
Furthermore, the end face of one end of the limiting ring, which is inserted into the opening of the C-shaped sleeve, is recessed into an annular groove, and the end of the spiral spring, which is close to the upstream, is inserted into the annular groove.
Further, an anti-static component is arranged between the valve rod and the valve cover and between the valve rod and the ball body, and the anti-static component comprises a spring and a jacking ball which are connected in sequence;
between valve rod and valve gap: the spring is inserted on the valve rod, one side of the jacking ball is positioned in the valve rod, and the other end of the jacking ball is abutted against the inner hole wall of the valve cover;
between the valve rod and the ball body: the bottom end of the valve rod is inserted into the ball body, the spring is inserted into the valve rod, one side of the tightening ball is located in the valve rod, and the other end of the tightening ball is abutted to the ball body.
Due to the adoption of the technical scheme, the beneficial effects of the utility model are that:
1. the utility model relates to a middle cavity self-pressure-relief low-temperature ball valve, when the low-temperature medium in the ball installation cavity heats up and vaporizes, the internal pressure of the ball installation cavity rises sharply, when its pressure is greater than the medium pressure in the ball valve fluid passage, the high-pressure medium in the ball installation cavity carries out pressure relief to the environment with lower pressure in the fluid passage through the pressure relief passage, thereby reducing the pressure in the ball installation cavity and preventing the ball from generating danger because of the overpressure of the ball installation cavity;
2. the utility model relates to a middle chamber is from release low temperature ball valve, when the pressure medium in the upper reaches flowed into between the outer periphery of upper reaches runner and valve seat subassembly, the medium flowed into in the C jacket from the opening of C jacket to make the inside and outside circle of C jacket more closely laminate with valve seat subassembly and valve body, then further promote the leakproofness around the spring energy storage circle;
3. the utility model relates to a middle cavity self-pressure relief low-temperature ball valve, which is a sealing structure consisting of a spiral spring and a C-shaped sleeve, can prevent the medium in a flow passage from entering a ball installation cavity, but is convenient for pressure relief through the part after the medium pressure in the ball installation cavity rises; so that no matter the ball body of the utility model is in the open circuit or the broken circuit, the high-pressure medium in the ball body installation cavity can be decompressed through the position; and compared with the pressure relief through a pressure relief channel, the pressure relief through the upstream is more direct and rapid, and the path is shorter.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the proportional relationship of each component in the drawings in this specification does not represent the proportional relationship in the actual material selection design, and it is only a schematic diagram of the structure or the position, in which:
fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is an enlarged view at B in fig. 1.
Reference numerals in the drawings indicate:
1-valve body, 2-ball body installation cavity, 3-valve seat component, 4-ball, 5-valve rod, 6-valve cover, 7-pressure relief channel, 701-first channel, 702-second channel, 703-third channel, 704-fourth channel, 8-fluid channel, 9-spring energy storage ring, 901-coil spring, 902-C type sleeve, 10-upstream flow channel, 11-ring body, 12-limiting ring, 13-spring and 14-tightening ball.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention.
The present invention will be described in detail with reference to fig. 1 to 3.
Example 1
As shown in fig. 1-3, the utility model relates to a middle chamber is from release low temperature ball valve, insert in the spheroid installation cavity 2 of valve body 1 and through disk seat component 3 and the sealed complex spheroid 4 of valve body 1, one end and insert spheroid installation cavity 2 and with spheroid 4 coaxial coupling's valve rod 5 and fix valve gap 6 on valve rod 5 in valve body 1 upper end and cover, insert spheroid installation cavity 2 after the central point portion evagination of valve gap 6 bottom the bottom of valve rod 5 is provided with pressure release passageway 7, the one end downwardly extending of pressure release passageway 7 and with the fluid passage 8 intercommunication on the spheroid 4, its other end wear out behind the valve rod 5 lateral wall run through one side at valve gap 6 evagination position with spheroid installation cavity 2 intercommunication.
When the ball valve is communicated with a valve body flow passage, the ball body installation cavity is a closed space, one side of the ball body installation cavity is isolated from the flow passage on the valve body due to the sealing effect of the valve seat assembly, and the other side of the ball body installation cavity is isolated from the fit clearance between the valve rod and the valve rod due to the effect of a sealing ring and the like between the valve rod and the bottom of the valve cover; when the low-temperature medium in the ball installation cavity is heated and vaporized, the pressure in the ball installation cavity is increased rapidly, and the pressure of the high-pressure medium in the ball installation cavity is greater than the pressure of the medium in the fluid channel of the ball valve, the high-pressure medium in the ball installation cavity is released to the environment with lower pressure in the fluid channel through the pressure release channel 7, so that the pressure in the ball installation cavity is reduced, and the ball is prevented from being dangerous due to overpressure of the ball installation cavity.
Example 2
The specific implementation of the pressure relief channel 7 in example 1 is as follows:
as shown in fig. 2, the pressure relief passage 7 includes a first passage 701 located on one side of the protruding portion of the bonnet 6, a second passage 702 located on the radial direction of the valve rod 5, a third passage 703 located on the axial direction of the valve rod 5, and a fourth passage 704 located on the ball 4, which are sequentially communicated, one end of the first passage 701 and one end of the second passage 702 are communicated with each other through a fit clearance between the valve rod 5 and the bonnet 6, the other end of the first passage 701 is communicated with the ball mounting cavity 2, and one end of the fourth passage 704, which is far away from the third passage 703, is communicated with the fluid passage 8 on the ball 4.
Example 3
In this embodiment, the following structure is further adopted for the pressure relief structure:
as shown in fig. 1 and 3, the upstream flow passage 10 located in the valve body 1 and the outer circumferential surface of the valve seat assembly 3 are in one-way sealing fit with the upstream flow passage 10 on the valve body 1 through a spring energy storage ring 9, the spring energy storage ring 9 includes an annular coil spring 901 and a C-shaped sleeve 902 sleeved on the coil spring 901, an opening of the C-shaped sleeve 902 faces upstream, and inner and outer rings of the C-shaped sleeve are respectively attached to the valve seat assembly 3 and the valve body 1.
When the pressure medium in the upstream flows into the space between the upstream flow channel 10 and the outer circumferential surface of the valve seat assembly 3, the medium flows into the C-shaped sleeve 902 from the opening of the C-shaped sleeve 902, so that the inner ring and the outer ring of the C-shaped sleeve 902 are more tightly attached to the valve seat assembly 3 and the upstream flow channel 10, the sealing performance around the spring energy storage ring 9 is further improved, and the medium in the flow channel cannot enter the sphere installation cavity 2 through the spring energy storage ring 9; when the pressure of the medium in the ball mounting chamber 2 rises to be higher than the pressure of the medium in the flow passage, the medium presses the side of the C-shaped sleeve 902 away from the opening, so that the pressure is released from the flow passage between the C-shaped sleeve 902 and the upstream flow passage 10 or between the C-shaped sleeve 902 and the valve seat assembly 3.
In the utility model, the sealing structure composed of the coil spring 901 and the C-shaped sleeve 902 can prevent the medium in the flow passage from entering the ball installation cavity, but is convenient for the medium pressure in the ball installation cavity to be increased and then to be decompressed through the position; so that no matter the ball body of the utility model is in the open circuit or the broken circuit, the high-pressure medium in the ball body installation cavity can be decompressed through the position; and compared with the pressure relief through the pressure relief channel 7, the pressure relief through the upstream is more direct and rapid, and the path is shorter.
Further, a ring body 11 is sleeved on the valve seat assembly 3 and located on the upstream side of the spring energy storage ring 9, the inner ring and the outer ring of the ring body 11 are respectively attached to the valve seat assembly 3 and the valve body 1, one side of the ring body, which is close to the spring energy storage ring 9, protrudes outwards to form a limiting ring 12, and one side of the limiting ring 12, which is far away from the ring body 11, is inserted into an opening of the C-shaped sleeve 902.
The limiting ring 12 is arranged to enable the opening of the C-shaped sleeve 902 to be always in an opening state, so that the C-shaped sleeve is prevented from losing one-way sealing performance after being pressed and deformed.
Further, an end face of one end of the limiting ring 12, which is inserted into the opening of the C-shaped sleeve 902, is recessed into an annular groove, and an end of the coil spring 901, which is close to the upstream, is inserted into the annular groove.
The arrangement of the annular groove increases the contact surface between the spiral spring 901 and the limit ring 12, reduces the contact stress and prolongs the service life.
Example 3
The present embodiment is further described on the basis of the above embodiments.
As shown in fig. 1 and 2, an anti-static component is arranged between the valve rod 5 and the valve cover 6 and between the valve rod 5 and the ball 4, and the anti-static component comprises a spring 13 and a jacking ball 14 which are connected in sequence;
between the valve stem 5 and the bonnet 6: the spring 13 is inserted on the valve rod 5, one side of the jacking ball is positioned in the valve rod 5, and the other end of the jacking ball is abutted against the inner hole wall of the valve cover 6;
between the stem 5 and the ball 4: the bottom end of the valve rod 5 is inserted into the sphere 4, the spring 13 is inserted on the valve rod 5, one side of the puller ball is positioned in the valve rod 5, and the other end of the puller ball is abutted against the sphere 4.
When the ball valve is used for controlling flammable media, static electricity needs to be removed in time. Therefore, static electricity generated by friction between the medium and the ball body is led out through the valve rod, the valve cover and the ball valve mounting frame, and the working stability of the ball valve is guaranteed.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a lumen is from release low temperature ball valve, includes valve body (1), arrange in spheroid installation cavity (2) of valve body (1) and through valve seat component (3) and valve body (1) sealed complex spheroid (4), one end insert in spheroid installation cavity (2) and with spheroid (4) coaxial coupling's valve rod (5) and fix valve body (1) upper end and cover establish valve gap (6) on valve rod (5), its characterized in that: the ball valve is characterized in that the center part of the bottom of the valve cover (6) protrudes outwards and then is inserted into the ball body installation cavity (2), a pressure relief channel (7) is arranged at the bottom of the valve rod (5), one end of the pressure relief channel (7) extends downwards and is communicated with a fluid channel (8) on the ball body (4), and the other end of the pressure relief channel penetrates through the side wall of the valve rod (5) and then penetrates through the side of the protruding part of the valve cover (6) and then is communicated with the ball body installation cavity (2).
2. The middle-cavity self-pressure-relief cryogenic ball valve according to claim 1, wherein: the pressure relief channel (7) comprises a first channel (701) located on one side of a convex part of the valve cover (6), a second channel (702) located on the radial direction of the valve rod (5), a third channel (703) located on the axial direction of the valve rod (5) and a fourth channel (704) located on the sphere (4) which are sequentially communicated, one end of the first channel (701) and one end of the second channel (702) are communicated with each other through a matching gap between the valve rod (5) and the valve cover (6), the other end of the first channel (701) is communicated with the sphere installation cavity (2), and one end, far away from the third channel (703), of the fourth channel (704 is communicated with a fluid channel (8) on the sphere (4).
3. The middle-cavity self-pressure-relief cryogenic ball valve according to claim 1, wherein: the upstream runner (10) that is located valve body (1) with the outer periphery of disk seat subassembly (3) passes through spring energy storage circle (9) and cooperates with the one-way sealed cooperation of upstream runner (10) on the valve body (1), spring energy storage circle (9) are including annular coil spring (901) and the C type cover (902) of cover on coil spring (901), the opening of C type cover (902) is towards the upper reaches, and its inside and outside circle is laminated with disk seat subassembly (3) and valve body (1) respectively.
4. The middle-cavity self-pressure-relief cryogenic ball valve according to claim 3, wherein: the valve seat component (3) is sleeved with a ring body (11) on the upstream side of the spring energy storage ring (9), the inner ring and the outer ring of the ring body (11) are respectively attached to the valve seat component (3) and the valve body (1), one side of the ring body, which is close to the spring energy storage ring (9), protrudes outwards to form a limiting ring (12), and one side of the limiting ring (12), which is far away from the ring body (11), is inserted into an opening of the C-shaped sleeve (902).
5. The middle-cavity self-pressure-relief cryogenic ball valve according to claim 4, wherein: the end face of one end of the limiting ring (12), which is inserted into the opening of the C-shaped sleeve (902), is recessed into an annular groove, and the end, which is close to the upstream, of the spiral spring (901) is inserted into the annular groove.
6. The middle-cavity self-pressure-relief cryogenic ball valve according to claim 1, wherein: anti-static components are arranged between the valve rod (5) and the valve cover (6) and between the valve rod (5) and the ball body (4), and each anti-static component comprises a spring (13) and a jacking ball (14) which are sequentially connected;
between the valve rod (5) and the valve cover (6): the spring (13) is inserted on the valve rod (5), one side of the jacking ball (14) is positioned in the valve rod (5), and the other end of the jacking ball is abutted against the inner hole wall of the valve cover (6);
between the valve stem (5) and the ball (4): the bottom end of the valve rod (5) is inserted into the ball body (4), the spring (13) is inserted into the valve rod (5), one side of the tightening ball (14) is positioned in the valve rod (5), and the other end of the tightening ball is abutted to the ball body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022786774.5U CN213839648U (en) | 2020-11-26 | 2020-11-26 | Middle-cavity self-discharging low-temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022786774.5U CN213839648U (en) | 2020-11-26 | 2020-11-26 | Middle-cavity self-discharging low-temperature ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN213839648U true CN213839648U (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022786774.5U Active CN213839648U (en) | 2020-11-26 | 2020-11-26 | Middle-cavity self-discharging low-temperature ball valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754162A (en) * | 2022-04-15 | 2022-07-15 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
| WO2024109095A1 (en) * | 2022-11-23 | 2024-05-30 | 江苏神通阀门股份有限公司 | Double-ball valve having multiple pressure relief functions |
-
2020
- 2020-11-26 CN CN202022786774.5U patent/CN213839648U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754162A (en) * | 2022-04-15 | 2022-07-15 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
| CN114754162B (en) * | 2022-04-15 | 2024-02-06 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
| WO2024109095A1 (en) * | 2022-11-23 | 2024-05-30 | 江苏神通阀门股份有限公司 | Double-ball valve having multiple pressure relief functions |
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Address after: No. 3281, HANGGANG 4th Road, xihanggang, Shuangliu District, Chengdu, Sichuan 610200 Patentee after: Sichuan Suke Fluid Control Equipment Co.,Ltd. Address before: No. 3281, HANGGANG 4th Road, xihanggang, Shuangliu District, Chengdu, Sichuan 610200 Patentee before: SICHUAN SUC FLOW CONTROL EQUIPMENT Co.,Ltd. |
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