CN215673691U - Ultra-low temperature deep cooling type upper assembling ball valve with built-in pressure release valve - Google Patents
Ultra-low temperature deep cooling type upper assembling ball valve with built-in pressure release valve Download PDFInfo
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- CN215673691U CN215673691U CN202121030626.9U CN202121030626U CN215673691U CN 215673691 U CN215673691 U CN 215673691U CN 202121030626 U CN202121030626 U CN 202121030626U CN 215673691 U CN215673691 U CN 215673691U
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- 238000001816 cooling Methods 0.000 title claims abstract description 14
- 230000002159 abnormal effect Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 25
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- 239000012530 fluid Substances 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000011089 mechanical engineering Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
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- 238000002309 gasification Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000011002 quantification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of mechanical engineering valves, in particular to an ultra-low temperature deep cooling type upper ball valve with a built-in pressure relief valve. The one-way pressure relief valve is arranged to discharge abnormal boosting media in the valve cavity, so that uncertainty of the valve seat in self pressure relief through area difference is avoided, and the reliability is high.
Description
Technical Field
The utility model relates to the technical field of mechanical engineering valves, in particular to an ultralow-temperature deep-cooling type upper-mounted ball valve with a built-in pressure release valve.
Background
The cryogenic upper-mounted ball valve is compact in structure, small in overall height and capable of achieving an online maintenance function, so that the cryogenic upper-mounted ball valve is widely used as a switch device on cryogenic pipelines of natural gas liquid plants and LNG receiving stations.
However, a cryogenic ball valve used under a cryogenic working condition can trap a part of media in the opening and closing processes, when the valve is in a fully-opened or fully-closed position, the trapped media are sealed by upstream and downstream sealing rings and are stored in a closed cavity, when the temperature rises, gasification occurs, the volume is increased by about 625 times, the pressure of the trapped media in a limited space can rise sharply, and the pressure boundary has the potential risk of failure.
The existing ultralow-temperature top-mounted fixed ball valve seat structure used under the deep cooling working condition is mostly of a double-valve seat structure (see fig. 1), a second sealing ring, a pre-tightening nut, a spring seat, a spring, a one-way universal plug, a two-way universal plug and other structures are arranged on a valve seat of the valve seat, and in order to avoid safety accidents caused by abnormal rising of pressure of a valve cavity, the designed valve seat can realize a self-pressure-releasing function, so that the valve seat is of a DBB (direct bonded bus) or DIB-II structure. Each valve seat of the DBB can resist medium force in a valve channel, and meanwhile, medium with abnormally raised middle cavity can be automatically decompressed, one valve seat of the DIB-II and the valve seat of the DBB can automatically decompress medium of the middle cavity while cutting off the channel medium, and the other valve seat can only cut off the channel medium but cannot decompress the medium of the middle cavity. Whether the valve structure is a DBB or DIB-II structure, the valve seat must be ensured to realize the self-pressure relief function.
Two pressure relief modes of the self-pressure relief valve seat (as shown in figure 2) are provided, wherein one mode is that the pressure is relieved from the second sealing ring and the ball body through the area difference formed by the medium in front of and behind the valve seat; the other is pressure relief from a one-way flooding plug mounted on the valve seat.
According to the designed valve structure, if the two pressure relief modes are realized when the pressure of the middle cavity rises, the designed fixed ball valve should satisfy the following relational expression;
when PA is more than PB + F, the pressure can push the valve seat to separate from the ball body, so that the pressure of the middle cavity is released from the position I;
when PA is less than PB + F-F, the one-way flooding plug can be pushed under the combined action of pressure, spring elasticity and friction force F, so that the pressure of the middle cavity is released from the position II.
According to the relational expression, the spring elasticity F can be calculated according to the spring compression amount, the specific values of the area differences PA and PB of the two sides of the valve seat can also be calculated through design, but the friction force F = uN cannot be calculated to obtain the specific values, the friction coefficient u cannot be determined, the flooding plug is in interference fit with the valve seat and the inner channel of the valve body, and the positive pressure N formed between the flooding plug and the valve seat and between the flooding plug and the valve body cannot be quantitatively calculated, so that the pressure relief of the valve body is uncertain. Meanwhile, the back pressure (valve cavity pressure) of the one-way flooding plug cannot exceed 5MPa, if the medium pressure abnormally rises to exceed 5MPa, the flooding plug can be damaged, a spring in the flooding plug is exploded, and broken spring iron shavings can scratch a sealing surface and a ball body to cause medium leakage.
The disadvantages of this structure are:
(1) uncertainty exists in self-pressure relief through a valve seat, quantification cannot be performed through calculation, and uncertainty exists in self-pressure relief of the valve seat;
(2) the pressure relief through the one-way universal plug has limitation, the abnormally increased medium pressure can cause the explosion of a spring in the universal plug, the equipment is manufactured at the upstream of the valve to be affected, and the possibility that the sealing surface and the ball body are scratched by the spring iron chip of the explosion is avoided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defect that the traditional cryogenic ball valve has low reliability in realizing the self-pressure relief function in the prior art, and provides an ultralow temperature cryogenic upper-mounted ball valve with a built-in pressure relief valve.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an ultra-low temperature dark cold type facial make-up ball valve of built-in relief valve, includes the valve body, be equipped with the fluid passage and the valve rod passageway of mutual intercommunication in the valve body, be equipped with the spheroid in the fluid passage, the valve rod passageway is kept away from fluid passage's an end cover and is had the valve gap, be equipped with the valve rod in the valve rod passageway, the valve rod leans on fluid passage's one side and ball connection, the valve rod deviates from spheroidal one end and passes the valve rod passageway and wear out the valve gap, install a disk seat between spheroidal both sides and the valve body respectively, the disk seat upper end is provided with two-way general stopper, and two set up a one-way relief valve mounting hole that is used for communicateing fluid passage and lumen on the valve body of the adjacent department of disk seat, every one-way relief valve of adaptation with it all installs in the one-way relief valve mounting hole.
Preferably, the one-way relief valve includes relief valve body, intercommunicating pore, mounting hole, run through in the relief valve body and seted up medium relief hole, medium relief hole comprises intercommunicating pore, the mounting hole that communicates each other, the internal diameter that the intercommunicating pore is close to mounting hole one end is less than the internal diameter of this department mounting hole, fixed mounting has from pressure release module in the mounting hole, be used for carrying out the pressure release when the lumen pressure is unusual from pressure release module.
Preferably, include steel ball, first sealing washer, elastic component seat from the pressure release module, the steel ball has been placed in the mounting hole, the steel ball is close to intercommunicating pore one side cover and is equipped with first sealing washer, first sealing washer and mounting hole interference fit, the hole diameter of first sealing washer is less than the diameter of steel ball, the steel ball is kept away from intercommunicating pore one side cover and is equipped with the elastic component, the internal diameter of elastic component is less than the diameter of steel ball, the elastic component overcoat is equipped with an elastic component seat, elastic component seat coaxial fixation is in the mounting hole, the elastic component seat is close to first sealing washer one end and supports tightly on the mounting hole inner wall with first sealing washer.
Preferably, the elastic member is a spring.
Preferably, the steel ball is made of stainless steel materials.
The utility model provides an ultra-low temperature deep cooling type upper ball valve with a built-in pressure release valve, which has the beneficial effects that: this cryrogenic ball valve is from pressure release structure overcomes the shortcoming of traditional cryrogenic ball valve, and its is rational in infrastructure and stable. The one-way pressure release valve is arranged to release the abnormal boosting medium in the valve cavity, so that uncertainty of the valve seat in self pressure release through area difference is avoided, and the reliability is high.
Drawings
FIG. 1 is a schematic diagram of a double-seat structure of a conventional ultra-low temperature top-loading type fixed ball valve;
FIG. 2 is a schematic diagram of a conventional self-venting valve seat;
FIG. 3 is a schematic diagram of the installation position of a one-way pressure relief valve of an ultra-low temperature deep cooling type ball valve with a built-in pressure relief valve according to the present invention;
fig. 4 is a schematic structural view of a one-way pressure release valve of an ultra-low temperature deep cooling type upper ball valve with a built-in pressure release valve provided by the utility model.
In the figure: the pressure relief valve comprises a one-way pressure relief valve 1, a pressure relief valve body 101, a communication hole 102, a mounting hole 103, a steel ball 104, a first sealing ring 105, an elastic part 106, an elastic part seat 107, a valve body 2, a ball 3, a valve seat 4, a second sealing ring 5, a pre-tightening nut 6, a spring seat 7, a spring 8, a one-way flooding plug 9, a two-way flooding plug 10, a middle cavity medium 11, a channel medium 12, a guide sleeve 13, a one-way pressure relief valve mounting hole 14 and a fluid channel 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1-4, an ultra-low temperature deep cooling type upper assembling ball valve with a built-in pressure relief valve, including a valve body 2, a fluid passage 15 and a valve rod passage which are communicated with each other are arranged in the valve body 2, a sphere 3 is arranged in the fluid passage 15, one end of the valve rod passage far away from the fluid passage 15 is covered with a valve cover, a valve rod is arranged in the valve rod passage, one side of the valve rod close to the fluid passage is connected with the sphere 3, one end of the valve rod far away from the sphere 3 penetrates through the valve rod passage and penetrates out of the valve cover, a valve seat 4 is respectively arranged between two sides of the sphere 3 and the valve body 2, the upstream end of the valve seat 4 is provided with a bidirectional flooding plug 10, a one-way pressure relief valve mounting hole 14 for communicating the fluid passage 15 and a middle cavity is arranged on the valve body 2 adjacent to the two valve seats 4, and a one-way pressure relief valve 1 matched with the one-way pressure relief valve is arranged in each one-way pressure relief valve mounting hole 14.
The one-way pressure relief valve 1 comprises a pressure relief valve body 101, a communication hole 102 and a mounting hole 103, a medium discharge hole is formed in the pressure relief valve body 101 in a penetrating mode and consists of the communication hole 102 and the mounting hole 103 which are communicated with each other, the inner diameter of one end, close to the mounting hole 103, of the communication hole 102 is smaller than that of the mounting hole 103, a self-pressure relief module is fixedly mounted in the mounting hole 103, and the self-pressure relief module is used for pressure relief when the pressure of a middle cavity is abnormal. The communication hole 102 is formed in a truncated cone-like shape as a whole, the mounting hole 103 is formed in a cylindrical shape as a whole, and the small-diameter end of the communication hole 102 is connected to the mounting hole 103. The self-pressure-relief module comprises a steel ball 104, a first sealing ring 105, an elastic piece 106 and an elastic piece seat 107, wherein the steel ball 104 is placed in a mounting hole 103, the steel ball 104 is made of stainless steel materials, and the steel ball made of the stainless steel materials is longer in service life and is corrosion-resistant. One side, close to the communicating hole 102, of the steel ball 104 is sleeved with a first sealing ring 105, the first sealing ring 105 is in interference fit with the mounting hole 103, the diameter of an inner hole of the first sealing ring 105 is smaller than that of the steel ball 104, one side, far away from the communicating hole 102, of the steel ball 104 is sleeved with an elastic part 106, the elastic part 106 is a spring, and the acting force of the spring is convenient to calculate. The inner diameter of the elastic piece 106 is smaller than the diameter of the steel ball 104, an elastic piece seat 107 is sleeved outside the elastic piece 106, the elastic piece seat 107 is coaxially fixed in the mounting hole 103, and one end of the elastic piece seat 107, which is close to the first sealing ring 105, abuts against the inner wall of the mounting hole 103 with the first sealing ring 105.
The utility model provides a novel design scheme, and the function of fixing a ball valve DBB or a DIB-II is realized by respectively processing and installing one-way relief valve installation holes 14 of a one-way relief valve 1 on a valve body after the structure of an upstream end one-way universal plug 9 is changed into a two-way universal plug 10 structure which is the same as that of a downstream end universal plug. According to the structure of the one-way pressure release valve 1 (see fig. 3), when the two sides of the steel ball 104 meet the condition that PC is larger than F (the back pressure at the steel ball 104 is larger than the elastic force of the spring), the medium force can push the elastic piece 106 away to release the medium 11 in the middle cavity. The pressure P value can be given according to the design requirement, and the area C is fixed, so that the elastic part force F can be calculated, and the pressure relief value of the one-way pressure relief valve 1 can be quantized through design calculation.
Example 2
Referring to fig. 1 to 4, as another preferred embodiment of the present invention, the difference from embodiment 1 is that embodiment 1 is applicable to a place where the number of times of opening and closing a cryogenic ball valve installed in a cryogenic pipeline of a natural gas and liquid plant or an LNG receiving station is frequent, and if the cryogenic ball valve installed in an installation system is in a normally open state, this scheme can be selected, and the principle is as follows: the upper part of the ball body 3 adjacent to the two valve seats 4 is provided with a one-way pressure relief valve 1 communicated with the fluid channel 15. Because the valve installed in the cryogenic device system is in a normally open state, abnormally increased pressure in the middle chamber can be discharged into the channel. Wherein, when the size of the sphere is S phi 86-S phi 135mm, 1/8-27NPT one-way relief valves can be selected, when the size of the sphere is S phi 135-S phi 250mm, 1/4-18NPT one-way relief valves can be selected, and when the size of the sphere is S phi 250-S phi 405mm, 3/8-18NPT one-way relief valves can be selected.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (5)
1. An ultra-low temperature deep cooling type upper-mounted ball valve with a built-in pressure relief valve comprises a valve body (2), wherein a fluid channel (15) and a valve rod channel which are communicated with each other are arranged in the valve body (2), a ball body (3) is arranged in the fluid channel (15), a valve cover is arranged at one end, far away from the fluid channel (15), of the valve rod channel, a valve rod is arranged in the valve rod channel, one side, close to the fluid channel, of the valve rod is connected with the ball body (3), one end, far away from the ball body (3), of the valve rod penetrates through the valve rod channel and penetrates out of the valve cover, a valve seat (4) is respectively arranged between the two sides of the ball body (3) and the valve body (2), the upper end of the valve seat (4) is provided with a bidirectional flooding plug (10), and the valve body (2) adjacent to the two valve seats (4) is provided with a one-way pressure relief valve mounting hole (14) for communicating the fluid channel (15) and a middle cavity, and a one-way pressure release valve (1) matched with the one-way pressure release valve is arranged in each one-way pressure release valve mounting hole (14).
2. The ultra-low temperature deep cooling type upper-mounted ball valve with the built-in pressure relief valve according to claim 1, wherein the one-way pressure relief valve (1) comprises a pressure relief valve body (101), a communication hole (102) and a mounting hole (103), a medium discharge hole is formed in the pressure relief valve body (101) in a penetrating manner and consists of the communication hole (102) and the mounting hole (103) which are communicated with each other, the inner diameter of one end, close to the mounting hole (103), of the communication hole (102) is smaller than that of the mounting hole (103), a self-pressure relief module is fixedly mounted in the mounting hole (103), and the self-pressure relief module is used for pressure relief when the pressure of the middle cavity is abnormal.
3. The ultra-low temperature deep cooling type upper-mounted ball valve with the built-in pressure relief valve according to claim 2, wherein the self-pressure relief module comprises a steel ball (104), a first sealing ring (105), an elastic member (106) and an elastic member seat (107), the steel ball (104) is placed in the mounting hole (103), the first sealing ring (105) is sleeved on one side, close to the communication hole (102), of the steel ball (104), the first sealing ring (105) is in interference fit with the mounting hole (103), the diameter of an inner hole of the first sealing ring (105) is smaller than that of the steel ball (104), the elastic member (106) is sleeved on one side, away from the communication hole (102), of the steel ball (104), the inner diameter of the elastic member (106) is smaller than that of the steel ball (104), the elastic member seat (107) is sleeved outside the elastic member (106), and the elastic member seat (107) is coaxially fixed in the mounting hole (103), one end of the elastic piece seat (107) close to the first sealing ring (105) tightly supports the first sealing ring (105) on the inner wall of the mounting hole (103).
4. The ultra-low temperature deep cooling type upper assembling ball valve with built-in pressure relief valve as claimed in claim 3, characterized in that said elastic member (106) is a spring.
5. The ultra-low temperature deep cooling type upper assembling ball valve with the built-in pressure relief valve as claimed in claim 3, characterized in that the steel ball (104) is made of stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121030626.9U CN215673691U (en) | 2021-05-14 | 2021-05-14 | Ultra-low temperature deep cooling type upper assembling ball valve with built-in pressure release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121030626.9U CN215673691U (en) | 2021-05-14 | 2021-05-14 | Ultra-low temperature deep cooling type upper assembling ball valve with built-in pressure release valve |
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| Publication Number | Publication Date |
|---|---|
| CN215673691U true CN215673691U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121030626.9U Active CN215673691U (en) | 2021-05-14 | 2021-05-14 | Ultra-low temperature deep cooling type upper assembling ball valve with built-in pressure release valve |
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| Country | Link |
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| CN (1) | CN215673691U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116928380A (en) * | 2023-09-18 | 2023-10-24 | 华英阀业有限公司 | Closed ultra-low temperature ball valve of helping hand of balanced atress |
-
2021
- 2021-05-14 CN CN202121030626.9U patent/CN215673691U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116928380A (en) * | 2023-09-18 | 2023-10-24 | 华英阀业有限公司 | Closed ultra-low temperature ball valve of helping hand of balanced atress |
| CN116928380B (en) * | 2023-09-18 | 2023-12-01 | 华英阀业有限公司 | Closed ultra-low temperature ball valve of helping hand of balanced atress |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231222 Address after: 363900 No.1 Shunda Road, Gunong Farm, Changtai District, Zhangzhou City, Fujian Province Patentee after: Fujian Huishang Technology Co.,Ltd. Address before: 363900 Yintang Industrial Zone, Gu Nong farm, Changtai County, Zhangzhou City, Fujian Province Patentee before: DATONG RECIPROCITY GROUP CO.,LTD. |
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| TR01 | Transfer of patent right |