CN215214695U - LNG valve link low temperature test sealing device is taken over in area extension - Google Patents
LNG valve link low temperature test sealing device is taken over in area extension Download PDFInfo
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- CN215214695U CN215214695U CN202022899487.5U CN202022899487U CN215214695U CN 215214695 U CN215214695 U CN 215214695U CN 202022899487 U CN202022899487 U CN 202022899487U CN 215214695 U CN215214695 U CN 215214695U
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Abstract
This novel sealing device that belongs to, concretely relates to area extension is taken over LNG valve link low temperature test sealing device. The utility model provides a take LNG valve link low temperature test sealing device of extension takeover, it includes head, sealing washer, seal gasket, dish spring and adapter. This neotype effect that is showing is: the utility model provides a take long takeover LNG valve link low temperature test sealing device, fine solution LNG valve through this sealing device when carrying out pressure test at-196 ℃ low temperature the sealed leakage problem of link, reasonable in design, simple structure, low temperature seal is reliable.
Description
Technical Field
This novel sealing device that belongs to, concretely relates to area extension is taken over LNG valve link low temperature test sealing device.
Background
The working temperature of the LNG (liquefied natural gas) valve is low at about-165 ℃, the working condition is severe, and the leakage is strictly required. In order to ensure the low-temperature sealing performance of the valve, the valve should meet the sealing performance requirement when tested under the low-temperature working condition of-196 ℃. The valve performance at low temperature is verified by performing a low-temperature sealing test at low temperature of-196 ℃ after the normal-temperature pressure test is qualified. Because the metal material and the nonmetal material can generate different degrees of shrinkage at low temperature, the reliable sealing mode of the normal-temperature sealing test can generate different degrees of leakage at low temperature, the accuracy of the valve sealing test result is directly influenced, and even the valve low-temperature sealing test can not be normally carried out.
SUMMERY OF THE UTILITY MODEL
The utility model provides a take long takeover LNG valve link low temperature test sealing device to prior art's defect.
This is novel to realize like this: the utility model provides a take LNG valve link low temperature test sealing device of extension takeover, it includes head, sealing washer, seal gasket, dish spring and adapter.
The LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe is characterized in that the end socket is provided with an internal thread, and the internal thread is connected with an external thread of the lengthened connecting pipe of the valve;
the LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe is characterized in that a flat-bottom hole is formed in the bottom of the end socket and matched with the outer circle of the sealing gasket boss; the end socket is provided with a hexagonal structure and used for screwing the end socket;
the LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe is characterized in that a through hole is formed in the center of the end socket and is communicated with a sealing gasket central hole and a valve channel; the seal head is connected with the adapter in a welding mode.
According to the LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe, the sealing gasket is a gasket with a boss, the excircle of the boss is matched with the flat bottom hole of the end socket, one end of the boss is matched with the inner diameter of the disc spring, the other end of the boss is matched with the inner diameter of the valve connecting pipe, the center of the sealing gasket is provided with the through hole, and the through hole is communicated with the center hole of the end socket and the valve channel.
According to the LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe, the sealing ring is of an annular structure, and the inner circle and the outer circle of the sealing ring are respectively matched with the sealing head and the sealing gasket and are arranged in a cavity formed among the sealing head, the sealing gasket and the end part of the lengthened connecting pipe of the valve.
According to the LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe, the disc spring is a sealing force compensation mechanism, sealing compensation force is provided in the low-temperature test process, the connecting end is sealed, and the disc spring is installed in a cavity formed between the seal head and the seal gasket.
According to the LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe, one end of the adapter is connected with the end socket, the other end of the adapter is connected with the test control equipment, and the adapter is applied to the air inlet end and the leakage detection end of the valve.
This neotype effect that is showing is: the utility model provides a take long takeover LNG valve link low temperature test sealing device, fine solution LNG valve through this sealing device when carrying out pressure test at-196 ℃ low temperature the sealed leakage problem of link, reasonable in design, simple structure, low temperature seal is reliable.
Drawings
Fig. 1 is a schematic diagram of the structure and the use of the novel LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe;
FIG. 2 is a schematic view of the structure of the head;
FIG. 3 is a schematic view of a gasket construction;
reference numbers in the drawings indicate: 1-sealing head; 2-a sealing gasket; 3-sealing ring; 4-valve (test valve schematic); 5-disc spring; 6-adapter; 21-flat bottom hole; 22-internal thread; 23-hexagonal structure; 31-disc spring positioning shoulder; 32-sealing shoulder; 33-Loading guide
Detailed Description
The following description will be given with reference to specific examples.
The utility model relates to a take LNG valve link low temperature test sealing device of extension takeover, as shown in figure 1, including head 1, seal gasket 2, sealing washer 3, dish spring 5 and adapter 6.
The end socket 1 is provided with an internal thread 22, and the internal thread 22 is connected with an external thread of the lengthened connecting pipe of the valve 4; the bottom of the seal head 1 is provided with a flat bottom hole 21, and the flat bottom hole 21 is matched with the excircle of the boss of the seal gasket 2; the end socket 1 is provided with a hexagonal structure 23 for screwing the end socket 1; the center of the seal head 1 is provided with a through hole which is communicated with the center hole of the seal gasket 2 and the channel of the valve 4; the end socket 1 is connected with the adapter 6 in a welding mode;
the sealing gasket 2 is a gasket with a boss, the excircle of the boss is matched with the flat bottom hole 21 of the end socket 1, one end of the boss is matched with the inner diameter of the disc spring 5, namely a disc spring positioning shoulder 31, the other end of the boss is matched with the inner diameter of a connecting pipe of the valve 4, namely a guide 33 is arranged, the center of the sealing gasket is provided with a through hole, and the through hole is communicated with a central hole of the end socket 1 and a channel of the valve 4;
the sealing ring 3 is of an annular structure, the inner circle and the outer circle of the sealing ring are respectively matched with the sealing gasket 2 and the end socket 1 and are arranged in a cavity formed among the end socket 1, the sealing gasket 2 and the end part of the lengthened connecting pipe of the valve 4;
the disc spring 5 is a sealing force compensation mechanism, provides sealing compensation force in the low-temperature test process to realize the sealing of the connecting end, is arranged in a cavity formed between the seal head 1 and the seal gasket 2 and is arranged on a disc spring positioning shoulder 31;
The novel realization mechanism is as follows: firstly, assembling at normal temperature, wherein an internal thread 22 of an end socket 1 is connected with an external thread of a lengthened connecting pipe of a valve 4, screwing the end socket 1, realizing pre-compression of a disc spring 5 and compressing a sealing ring 3, and when the disc spring 5 is compressed to the maximum limit, the left end part of a sealing gasket 2 is contacted with the bottom of a flat bottom hole of the end socket 1, so that the optimal sealing of the end part of the connecting pipe is achieved, and the effects of compressing the sealing ring 3 and protecting the disc spring 5 are achieved; when the low temperature test, precompressed dish spring 5 is as the compensation mechanism of a sealing force, and the sealed influence of the deformation shrink of compensation head 1, seal gasket 2, sealing washer 3, valve 4, dish spring 5 and adapter 6 to the link is sealed, provides sealed compensation power to guarantee that valve 4 extension takes over the sealed of link under the low temperature.
Claims (6)
1. The utility model provides a take LNG valve link low temperature test sealing device is taken over in extension which characterized in that: the sealing device comprises a sealing head, a sealing ring, a sealing gasket, a disc spring and an adapter;
the end socket is provided with internal threads, and the internal threads are connected with external threads of the lengthened valve connecting pipe;
the bottom of the seal head is provided with a flat bottom hole which is matched with the excircle of the seal gasket boss; the seal head is provided with a hexagonal structure and used for screwing the seal head.
2. The LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe of claim 1, wherein: the center of the seal head is provided with a through hole which is communicated with the center hole of the seal gasket and the valve channel; the seal head is connected with the adapter in a welding mode.
3. The LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe of claim 2, wherein: the sealing gasket is a gasket with a boss, the excircle of the boss is matched with the flat bottom hole of the end socket, one end of the boss is matched with the inner diameter of the disc spring, the other end of the boss is matched with the inner diameter of the valve connecting pipe, a through hole is arranged in the center of the gasket, and the through hole is communicated with the center hole of the end socket and the valve channel.
4. The LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe of claim 3, wherein: the sealing ring is of an annular structure, and the inner circle and the outer circle are respectively matched with the seal head and the seal gasket and are arranged in a cavity formed among the seal head, the seal gasket and the end part of the lengthened valve connecting pipe.
5. The LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe of claim 4, wherein: the disc spring is a sealing force compensation mechanism, provides sealing compensation force in the low-temperature test process, realizes the sealing of the connecting end, and is arranged in a cavity formed between the seal head and the seal gasket.
6. The LNG valve connecting end low-temperature test sealing device with the lengthened connecting pipe of claim 5, wherein: adapter one end is connected with the head, and the other end is connected with experimental controlgear, is applied to the inlet end and the leak hunting end of valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022899487.5U CN215214695U (en) | 2020-12-04 | 2020-12-04 | LNG valve link low temperature test sealing device is taken over in area extension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022899487.5U CN215214695U (en) | 2020-12-04 | 2020-12-04 | LNG valve link low temperature test sealing device is taken over in area extension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215214695U true CN215214695U (en) | 2021-12-17 |
Family
ID=79417767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022899487.5U Active CN215214695U (en) | 2020-12-04 | 2020-12-04 | LNG valve link low temperature test sealing device is taken over in area extension |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215214695U (en) |
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2020
- 2020-12-04 CN CN202022899487.5U patent/CN215214695U/en active Active
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