CN212429817U - Overpressure preventing structure for valve cover lengthened inner cavity of low-temperature ball valve - Google Patents
Overpressure preventing structure for valve cover lengthened inner cavity of low-temperature ball valve Download PDFInfo
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- CN212429817U CN212429817U CN202020840187.7U CN202020840187U CN212429817U CN 212429817 U CN212429817 U CN 212429817U CN 202020840187 U CN202020840187 U CN 202020840187U CN 212429817 U CN212429817 U CN 212429817U
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- ball valve
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- inner chamber
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Abstract
The utility model discloses a valve gap extension inner chamber of low temperature ball valve prevents superpressure structure, including ball valve gap, valve rod and disk seat, the vertical fixedly connected with ball valve gap of intermediate position department on disk seat top, and the inside vertical ball valve inner chamber of having seted up of ball valve gap, the inside pressure release hole of having seted up of ball valve gap of ball valve inner chamber one side lower extreme, the middle chamber has been seted up to the ball valve gap inside of pressure release hole one side, the inside vertical valve rod that is provided with of ball valve inner chamber, and the upper end fixedly connected with seal structure on valve rod surface, the top fixedly connected with top cap. The utility model discloses a lower extreme sets up the pressure release hole in ball valve inner chamber one side, and the ball valve inner chamber upper end in surface sets up seal structure, utilizes pressure spring elasticity to make the sealing member hug closely the valve rod for ball valve inner chamber space is minimum, and the pressure release hole can let out the inside too big pressure of ball valve inner chamber, avoids the device to take place superpressure phenomenon, and then improves the life of device.
Description
Technical Field
The utility model relates to a low temperature ball valve technical field specifically is a valve gap extension inner chamber of low temperature ball valve prevents superpressure structure.
Background
Along with the development of society, the pipeline industry of our country develops day by day, leads to the kind and the function of valve body also more and more, and low temperature ball valve is the on-off control who is used for low temperature pipeline medium, is used for low temperature trades such as Liquefied Natural Gas (LNG) widely, but the valve gap of current low temperature ball valve still has many problems or defects:
firstly, the valve cover of the traditional low-temperature ball valve has poor sealing performance when in use, and the sealing performance of the device is reduced under a low-temperature state, so that the normal use of the device is influenced;
secondly, the valve cover of the traditional low-temperature ball valve is not provided with a pressure relief structure during use, and an elongated inner cavity between the valve cover and the valve rod can generate overpressure phenomenon due to low temperature, so that the service life of the device is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a valve gap extension inner chamber of low temperature ball valve prevents superpressure structure to solve the relatively poor and problem that does not have the pressure release of leakproofness that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a valve gap extension inner chamber of low temperature ball valve prevents superpressure structure, includes ball valve gap, valve rod and disk seat, the vertical fixedly connected with ball valve gap of intermediate position department on disk seat top, and the inside vertical ball valve inner chamber of having seted up of ball valve gap, the inside pressure release hole of having seted up of ball valve gap of ball valve inner chamber one side lower extreme, and the inside pressure release structure that is provided with in pressure release hole, the inside lumen of having seted up of ball valve gap of pressure release hole one side, the inside vertical valve rod that is provided with of ball valve inner chamber, and the upper end fixedly connected with seal structure on valve rod surface, the top fixedly connected with top cap.
Preferably, the surface of the rocking handle is fixedly connected with an anti-skid pad, and the surface of the anti-skid pad is uniformly and fixedly connected with a friction bulge.
Preferably, the sealing structure is internally provided with a thrust gasket, a compression spring and a sealing element in sequence, the thrust gasket is fixedly connected to the surface of the upper end of the valve rod, the compression spring is uniformly and fixedly connected to the periphery of the inside of the thrust gasket, and the sealing element is fixedly connected to one end of the compression spring in an annular mode.
Preferably, the surface of the valve rod above the sealing structure is fixedly connected with the bottom of the stuffing box, the surface of the valve rod at the top end of the bottom of the stuffing box is fixedly connected with the packing layer, and the surface of the valve rod at the top end of the packing layer is fixedly connected with the packing gland.
Preferably, the top end of the interior of the ball valve cover on the surface of the valve rod is fixedly connected with a sealing gasket in an annular mode, and the inner wall of the sealing gasket is connected with a ball in a uniformly rotating mode.
Preferably, pressure release structure's inside has set gradually fender ball, buffer spring and dog, dog annular fixed connection is in the inside one side of pressure release hole, and the inside opposite side fixedly connected with buffer spring of pressure release hole, buffer spring's one end fixedly connected with keeps off the ball, and the area that just keeps off the ball cover is greater than the area of dog center circumference.
Compared with the prior art, the beneficial effects of the utility model are that: the valve cover lengthening inner cavity of the low-temperature ball valve has a structure for preventing overpressure, and has the advantages that:
(1) the sealing structure, the stuffing box bottom, the packing layer and the packing gland are arranged at the upper end of the surface of the valve rod, the sealing performance between the top cover and the valve cover of the ball valve can be improved by utilizing the stuffing box bottom, the packing layer and the packing gland, impurities or other media are prevented from entering the device to influence the normal use of the ball valve, the sealing element can be always attached to the surface of the valve rod under the elastic action of the compression spring, the sealing performance of the device is further improved, the space in the inner cavity of the ball valve is minimized, the possibility of overpressure in the inner cavity of the ball valve is avoided, and the service life of the device;
(2) the utility model discloses a ball valve, including ball valve inner chamber, pressure release hole inside, the middle chamber sets up in pressure release hole one side simultaneously, when this device is in under the low temperature condition, the device temperature reduces and leads to the inside pressure increase of ball valve inner chamber, when pressure reaches the certain degree and makes the inside superpressure that takes place of ball valve inner chamber, can make the ball that keeps off remove compression buffer spring, and then make and produce the clearance between ball and the dog, make the inside unnecessary medium of ball valve inner chamber can get into the middle chamber through the pressure release hole inside, make the inside pressure of ball valve inner chamber invariable, avoid the inside pressure of ball valve inner chamber excessive, and then make the device burst, increase production economy, even lead to the emergence of incident.
Drawings
FIG. 1 is a schematic front view of the present invention;
fig. 2 is a schematic view of the seal structure of the present invention showing an enlarged structure from the top view;
FIG. 3 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;
fig. 4 is an enlarged schematic structural diagram of the point B in fig. 1 according to the present invention.
In the figure: 1. a non-slip mat; 2. a rocking handle; 3. a top cover; 4. a ball valve cover; 5. a sealing structure; 501. a thrust washer; 502. a compression spring; 503. a seal member; 6. an inner cavity of the ball valve; 7. a valve stem; 8. a valve seat; 9. a pressure relief vent; 10. a pressure relief structure; 1001. blocking the ball; 1002. a buffer spring; 1003. a stopper; 11. a middle cavity; 12. a gasket; 13. the bottom of the stuffing box; 14. a filler layer; 15. and (4) a packing gland.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a valve cover lengthening inner cavity overpressure prevention structure of a low-temperature ball valve comprises a ball valve cover 4, a valve rod 7 and a valve seat 8, wherein the ball valve cover 4 is vertically and fixedly connected to the middle position of the top end of the valve seat 8, a ball valve inner cavity 6 is vertically formed in the ball valve cover 4, a pressure relief hole 9 is formed in the ball valve cover 4 at the lower end of one side of the ball valve inner cavity 6, and a pressure relief structure 10 is arranged in the pressure relief hole 9;
a blocking ball 1001, a buffer spring 1002 and a blocking block 1003 are sequentially arranged in the pressure relief structure 10, the blocking block 1003 is fixedly connected to one side of the inside of the pressure relief hole 9 in an annular mode, the buffer spring 1002 is fixedly connected to the other side of the inside of the pressure relief hole 9, the blocking ball 1001 is fixedly connected to one end of the buffer spring 1002, and the area covered by the blocking ball 1001 is larger than the area of the center circumference of the blocking block 1003;
specifically, as shown in fig. 1 and 3, when the mechanism is used, firstly, when the pressure reaches a certain degree, and overpressure occurs inside the inner cavity 6 of the ball valve, the blocking ball 1001 moves to compress the buffer spring 1002, so that a gap is generated between the blocking ball 1001 and the blocking block 1003, and redundant media inside the inner cavity 6 of the ball valve can enter the inner cavity 11 through the pressure relief hole 9, so that excessive pressure inside the inner cavity 6 of the ball valve is avoided, the device is further burst, and the service life of the device is prolonged;
a middle cavity 11 is formed in the ball valve cover 4 on one side of the pressure relief hole 9, and a valve rod 7 is vertically arranged in the ball valve inner cavity 6;
the top end of the interior of the ball valve cover 4 on the surface of the valve rod 7 is fixedly connected with a sealing gasket 12 in an annular mode, and the inner wall of the sealing gasket 12 is uniformly and rotatably connected with a ball;
specifically, as shown in fig. 1 and 4, when the mechanism is used, firstly, the sealing gasket 12 is arranged, so that the sealing performance of the device is better, media such as impurities are prevented from entering the device, and the ball bearing is arranged, so that the valve rod 7 can be conveniently rotated;
and the upper end of the surface of the valve rod 7 is fixedly connected with a sealing structure 5;
a thrust washer 501, a compression spring 502 and a sealing element 503 are sequentially arranged inside the sealing structure 5, the thrust washer 501 is fixedly connected to the surface of the upper end of the valve rod 7, the compression spring 502 is uniformly and fixedly connected to the periphery inside the thrust washer 501, and the sealing element 503 is fixedly connected to one end of the compression spring 502 in an annular mode;
specifically, as shown in fig. 1, 2 and 4, when the mechanism is used, firstly, the elastic force of the compression spring 502 is utilized, so that the sealing member 503 can be always tightly attached to the surface of the valve rod 7, the sealing performance of the device is further improved, the space of the inner cavity 6 of the ball valve is minimized, and the possibility of overpressure inside the inner cavity 6 of the ball valve is avoided;
the surface of the valve rod 7 above the sealing structure 5 is fixedly connected with a packing box bottom 13, the surface of the valve rod 7 at the top end of the packing box bottom 13 is fixedly connected with a packing layer 14, and the surface of the valve rod 7 at the top end of the packing layer 14 is fixedly connected with a packing gland 15;
specifically, as shown in fig. 1 and 4, when the mechanism is used, firstly, the sealing performance between the top cover 3 and the ball valve cover 4 can be improved by using the stuffing box bottom 13, the stuffing layer 14 and the stuffing gland 15, so that impurities or other media are prevented from entering the inside of the device and affecting the normal use of the ball valve;
the top end of the ball valve cover 4 is fixedly connected with a top cover 3, and the top end of the top cover 3 is fixedly connected with a rocking handle 2;
the surface of the rocking handle 2 is fixedly connected with an anti-skid pad 1, and the surface of the anti-skid pad 1 is uniformly and fixedly connected with friction bulges;
specifically, as shown in fig. 1, when the mechanism is used, firstly, the friction between the hand and the rocking handle 2 can be increased through the non-slip mat 1 and the friction bulge on the surface of the non-slip mat, so that the ball valve can be opened and closed conveniently.
The working principle is as follows: when the device is used, firstly, after the device is fixed on a corresponding pipeline, the opening and closing operation of the ball valve is realized by rotating the rocking handle 2, the sealing property between the top cover 3 and the ball valve cover 4 can be improved by utilizing the bottom 13 of the stuffing box, the packing layer 14 and the packing gland 15, and the sealing member 503 can be always attached to the surface of the valve rod 7 under the elastic force action of the compression spring 502, so that the sealing property of the device is further improved, the space of the inner cavity 6 of the ball valve is minimized, and the possibility of overpressure in the inner cavity 6 of the ball valve is avoided;
simultaneously when this device is in under the low temperature condition, the device temperature reduction leads to the inside pressure increase of ball valve inner chamber 6, when pressure reaches certain degree and makes the inside superpressure that takes place of ball valve inner chamber 6, can make ball 1001 remove compression buffer spring 1002, and then make and produce the clearance between ball 1001 and the dog 1003, make inside unnecessary medium of ball valve inner chamber 6 can get into the lumen 11 through pressure release hole 9 inside, avoid the inside pressure of ball valve inner chamber 6 excessive, and then make the device burst.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a valve gap extension inner chamber of low temperature ball valve prevents superpressure structure, includes ball valve gap (4), valve rod (7) and disk seat (8), its characterized in that: the improved ball valve is characterized in that a ball valve cover (4) is fixedly and vertically arranged at the middle position of the top end of the valve seat (8), a ball valve inner cavity (6) is vertically arranged inside the ball valve cover (4) at the lower end of one side of the ball valve inner cavity (6), a pressure relief hole (9) is formed inside the ball valve cover (4) at the lower end of one side of the ball valve inner cavity (6), a pressure relief structure (10) is arranged inside the pressure relief hole (9), a middle cavity (11) is formed inside the ball valve cover (4) at one side of the pressure relief hole (9), a valve rod (7) is vertically arranged inside the ball valve inner cavity (6), a sealing structure (5) is fixedly connected to the upper end of the surface of the valve rod (7), a top cover (3).
2. The structure for preventing overpressure for the valve cover of a cryogenic ball valve according to claim 1, wherein: the surface of the rocking handle (2) is fixedly connected with an anti-skid pad (1), and the surface of the anti-skid pad (1) is uniformly and fixedly connected with a friction bulge.
3. The structure for preventing overpressure for the valve cover of a cryogenic ball valve according to claim 1, wherein: the sealing structure is characterized in that a thrust gasket (501), a compression spring (502) and a sealing element (503) are sequentially arranged inside the sealing structure (5), the thrust gasket (501) is fixedly connected to the surface of the upper end of the valve rod (7), the compression spring (502) is uniformly and fixedly connected to the periphery of the inside of the thrust gasket (501), and the sealing element (503) is fixedly connected to the one end of the compression spring (502) in an annular mode.
4. The structure for preventing overpressure for the valve cover of a cryogenic ball valve according to claim 3, wherein: the surface of the valve rod (7) above the sealing structure (5) is fixedly connected with a packing box bottom (13), the surface of the valve rod (7) at the top end of the packing box bottom (13) is fixedly connected with a packing layer (14), and the surface of the valve rod (7) at the top end of the packing layer (14) is fixedly connected with a packing gland (15).
5. The structure for preventing overpressure for the valve cover of a cryogenic ball valve according to claim 1, wherein: the ball valve is characterized in that a sealing gasket (12) is fixedly connected to the top end of the interior of the ball valve cover (4) on the surface of the valve rod (7) in an annular mode, and balls are connected to the inner wall of the sealing gasket (12) in an evenly rotating mode.
6. The structure for preventing overpressure for the valve cover of a cryogenic ball valve according to claim 1, wherein: the pressure release structure (10) is characterized in that a blocking ball (1001), a buffer spring (1002) and a blocking block (1003) are sequentially arranged inside the pressure release structure (10), the blocking block (1003) is fixedly connected to one side inside the pressure release hole (9) in an annular mode, the other side inside the pressure release hole (9) is fixedly connected with the buffer spring (1002), the blocking ball (1001) is fixedly connected to one end of the buffer spring (1002), and the area covered by the blocking ball (1001) is larger than the area of the center circumference of the blocking block (1003).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020840187.7U CN212429817U (en) | 2020-05-19 | 2020-05-19 | Overpressure preventing structure for valve cover lengthened inner cavity of low-temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020840187.7U CN212429817U (en) | 2020-05-19 | 2020-05-19 | Overpressure preventing structure for valve cover lengthened inner cavity of low-temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212429817U true CN212429817U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020840187.7U Expired - Fee Related CN212429817U (en) | 2020-05-19 | 2020-05-19 | Overpressure preventing structure for valve cover lengthened inner cavity of low-temperature ball valve |
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| Country | Link |
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| CN (1) | CN212429817U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321474A (en) * | 2021-12-31 | 2022-04-12 | 盐城欧润石化设备制造有限公司 | Petroleum pipeline valve convenient to overhaul |
-
2020
- 2020-05-19 CN CN202020840187.7U patent/CN212429817U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321474A (en) * | 2021-12-31 | 2022-04-12 | 盐城欧润石化设备制造有限公司 | Petroleum pipeline valve convenient to overhaul |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210129 |