CN218674100U - Low temperature valve gas tightness testing arrangement - Google Patents
Low temperature valve gas tightness testing arrangement Download PDFInfo
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- CN218674100U CN218674100U CN202223341829.7U CN202223341829U CN218674100U CN 218674100 U CN218674100 U CN 218674100U CN 202223341829 U CN202223341829 U CN 202223341829U CN 218674100 U CN218674100 U CN 218674100U
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Abstract
The utility model belongs to low temperature valve test equipment. In view of the problem of poor sealing effect of the existing low-temperature valve air tightness testing device, the utility model discloses a low-temperature valve air tightness testing device, which comprises a bracket; a first sealing head; the second sealing head is arranged opposite to the first sealing head; a drive structure to drive the first and second sealing heads towards each other; the second sealing head and the first sealing head are the same in structure, and comprise outer sealing, wherein the second sealing head is in a cylindrical shape with openings at two ends, and the inner diameter of the second sealing head is larger than the outer diameter of two ends of the low-temperature valve; an air pipe is arranged on the mounting seat; the inner seal is cylindrical and is coaxially arranged in the outer seal; the outer diameter of one end of the inner seal, which is far away from the mounting seat, is smaller than the inner diameters of two ends of the low-temperature valve, and the outer diameter of the inner seal gradually increases along with the approach of the mounting seat; the center of the axis of the inner seal is provided with a channel communicated with the air pipe. The testing device has good sealing effect and can adapt to low-temperature valves with different calibers.
Description
Technical Field
The utility model belongs to low temperature valve test equipment, concretely relates to low temperature valve gas tightness testing arrangement.
Background
The low-temperature valve is a valve suitable for medium with low temperature, generally-40 ℃ to-196 ℃, and is mainly used for a pipeline system of normal-temperature inflammable and easily gasified medium. Such as ethylene, liquid oxygen, liquid hydrogen, liquefied natural gas, liquefied petroleum products, and the like. The media are easy to gasify at normal temperature, thereby causing volume expansion and affecting the safety of pipelines; therefore, the low-temperature valve cannot diffuse heat, and therefore, the conventional low-temperature valve needs to be subjected to airtightness detection before shipment.
Most of the existing air tightness detection devices adopt sealing gaskets or sealing rings to be arranged outside two ends of a valve, and force application devices are used for clamping two ends of the valve, so that the sealing gaskets or the sealing rings and two end parts of the valve form sealing, and then the sealing gaskets or the sealing rings are placed in a liquid nitrogen pool for sealing test.
However, the structure has the problem that the valve and the sealing gasket or the sealing ring cannot form sealing, so that the test result is influenced.
SUMMERY OF THE UTILITY MODEL
In view of above-mentioned current low temperature valve gas tightness detection device has sealed insecure problem, the utility model aims at one of provide a low temperature valve gas tightness detection device, this detection device is sealed effectual, and can adapt to the low temperature valve of different bores, and the suitability is better.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a low-temperature valve air tightness testing device comprises a bracket; a first sealing head mounted on the bracket; the second sealing head is arranged on the bracket and is opposite to the first sealing head; a drive structure to drive the first and second sealing heads toward each other to seal the ends of the cryogenic valve.
The second sealing head and the first sealing head are the same in structure, and comprise outer sealing, wherein the second sealing head is in a cylindrical shape with openings at two ends, and the inner diameter of the second sealing head is larger than the outer diameters of two ends of the low-temperature valve; the mounting seat is connected with one end of the outer seal so as to seal one end of the outer seal; an air pipe is arranged on the mounting seat; the inner seal is cylindrical, is arranged in the outer seal and is coaxial with the outer seal; the outer diameter of one end of the inner seal, which is far away from the mounting seat, is smaller than the inner diameters of two ends of the low-temperature valve, and the outer diameter of the inner seal gradually increases along with the approach of the mounting seat; and a channel communicated with the air pipe is arranged in the center of the axis of the inner seal.
In one of the technical solutions disclosed in the present invention, the device further comprises a support frame installed on the support frame for supporting the low temperature valve; the support frame is slidable between the first sealing head and the second sealing head.
In one of the technical solutions disclosed in the present invention, the supporting frame includes a sliding seat, which is slidably mounted on the supporting frame; the connecting plate is connected with the sliding seat; the height of the connecting plate is adjustable; the bearing seats are arranged on two sides of the connecting plate and correspond to the first sealing head and the second sealing head; the bearing seat is provided with a bearing groove.
In one of the technical solutions disclosed in the present invention, the sliding seat is provided with a plurality of screws; the connecting plate is arranged on the screw in a penetrating mode and is connected and fixed through nuts.
In one of the technical solutions disclosed in the present invention, the receiving groove is "V" shaped.
In one of the technical solutions disclosed in the present invention, the support includes a bottom plate; the left side plate is arranged on the bottom plate; the right side plate is opposite to the left side plate; and the connecting rod is connected with the left side plate and the right side plate.
Wherein the first sealing head is mounted on the left side plate; the second sealing head is slidably mounted on the connecting rod; the drive structure is connected with the second sealing head.
In one of the technical solutions disclosed in the present invention, the driving structure includes a pushing shaft;
wherein, the side surface of the right side plate is provided with a screw hole which runs through the right side plate;
the pushing shaft is in threaded connection with the screw hole, and one end of the pushing shaft penetrates through the right side plate and is movably connected with the second sealing head.
The utility model discloses an among one of them technical scheme, its characterized in that, still be equipped with the lug on the support.
As can be seen from the above description, compared with the prior art, the beneficial effects of the present invention are:
(1) First sealed head and the mode that the second sealed head adopted interior seal and external seal to combine, and the external diameter of interior seal is along with being close mount pad grow gradually, and is sealed effectual, and the low temperature valve of adaptable different bores, and the suitability is wider.
(2) The support frame is arranged to support the low-temperature valve, so that the low-temperature valve is convenient and quick to mount; the height of the bearing seat is adjustable, and the bearing seat is provided with a V-shaped bearing groove, so that the low-temperature valve can adapt to low-temperature valves with different calibers, and the axial centers of two ends of the low-temperature valve are ensured to be superposed with the axial center of the first sealing head.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a schematic longitudinal sectional structure of the present invention.
Reference numerals: 1-a scaffold; 11-a base plate; 12-left side panel; 13-right side plate; 14-a connecting rod; 15-lifting lugs; 2-a first sealing head; 3-a second sealing head; 21-a mounting seat; 211-trachea; 22-internal sealing; 221-a channel; 23-external sealing; 4-a support frame; 41-sliding seat; 411-screw rod; 42-a connecting plate; 43-a bearing seat; 5-pushing the shaft.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed 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.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The embodiment of the utility model discloses low temperature valve gas tightness testing arrangement, its structure is as shown in figure 1-figure 3, including support 1, first sealed head 2, the sealed head of second 3, support frame 4 and promotion axle 5.
Specifically, the bracket 1 is constituted by a bottom plate 11, a left side plate 12, a right side plate 13, and a connecting shaft 14 connecting the left side plate 12 and the right side plate 13.
The second sealing head 3 is slidably mounted on the connecting shaft 14 and is reciprocable along the connecting shaft 14 between the left and right side plates 12, 13 for sealing one end of the cryogenic valve.
The first sealing head 2 and the second sealing head 3 are oppositely arranged and fixed on the left side plate 12 for sealing the other end of the low-temperature valve.
The first sealing head 2 and the second sealing head 3 are identical in structure. The first sealing head 2 and the second sealing head 3 each have a mounting seat 21, an inner seal 22 and an outer seal 23.
Wherein, the mounting base 21 is provided with an air pipe 211.
The outer seal 23 is cylindrical with both ends open, and one end thereof is sealed by the mount 21. The inner diameter of the outer seal 23 is larger than the outer diameter of both ends of the cryogenic valve.
The inner seal 22 is a truncated cone coaxially disposed within the outer seal 23. The outer diameter of the inner seal 22 on the side away from the mounting seat 21 is smaller than the inner diameter of the two ends of the cryogenic valve, and the outer diameter of the inner seal 22 gradually increases as approaching the mounting seat 21. The axial center of the inner seal 22 is provided with a passage 221 communicating with the air tube 211.
The sealing effect is good by adopting the matching mode of the inner seal 22 and the outer seal 23; meanwhile, the outer diameter of the inner seal 22 gradually increases as the inner seal approaches the mounting seat 21, so that the valve can adapt to valves with different calibers and different types, such as a valve capable of testing DN80 and a valve capable of testing DN 100.
The pushing shaft 5 is in threaded connection with a threaded hole in the right side plate 13, and one end of the pushing shaft penetrates through the right side plate 13 to be movably connected with a mounting seat of the second sealing head 3, so that the second sealing head 3 is pushed to move.
The support frame 4 is slidably mounted on the base plate 11 for supporting the cryogenic valve. The support frame 4 includes a sliding seat 41, a connecting plate 42 and a bearing seat 43.
Wherein, the sliding seat 41 can be slidably mounted on the bottom plate 11. The sliding seat 41 is provided with a plurality of screws 411.
The connecting plate 42 is inserted into the plurality of screws 411 and fixed by nuts.
The bearing seat 43 is installed on the connecting plate 42 corresponding to the two sides of the first sealing head 2 and the second sealing head 3, and is provided with a V-shaped bearing groove.
When the low-temperature valve works, the low-temperature valve is placed on the bearing seat 43, and the pushing shaft 5 drives the sliding seat 41 to move after pushing the second sealing head 3 to be in contact with one end of the low-temperature valve, so that the sealing of the two ends of the low-temperature valve is realized; meanwhile, the V-shaped bearing groove is arranged, so that the valve can adapt to valves with different calibers; and the height of the connecting plate 42 can be adjusted by loosening and tightening the nut to adapt to valves with different calibers.
In one embodiment of the present invention, since the cryogenic valve needs to be immersed in the liquid nitrogen bath, the top of the left side plate 12 and the right side plate 13 is provided with the lifting lugs 15 for the convenience of moving the testing device.
The embodiment of the utility model provides a theory of operation is:
(1) Firstly, the height of the connecting plate 42 is adjusted according to the calibers of the two ends of the low-temperature valve of the batch to be tested, so that the axial centers of the two ends of the low-temperature valve are overlapped with the axial center of the first sealing head 2, and then the low-temperature valve of the same batch can be continuously tested;
(2) Placing the low-temperature valve on a support frame 4, rotating a pushing shaft 5 to drive a second sealing head 3 to move towards a first sealing head 2, so as to drive the support frame 4 and the low-temperature valve to move, and clamping the low-temperature valve between the first sealing head 2 and the second sealing head 3, so as to seal two ends of the low-temperature valve;
(3) Closing the low-temperature valve, and hoisting the low-temperature valve into a low-temperature liquid nitrogen pool through the lifting lugs 15 to perform low-temperature test; compressed gas is introduced into the low-temperature valve through the gas pipe of the second sealing head 3, the tail end of the gas pipe of the first sealing head 2 is placed into the water pool, and whether bubbles exist is detected.
As can be seen from the above description, the embodiments of the present invention have the following advantages:
the first sealing head 2 and the second sealing head 3 adopt a mode of combining inner sealing and outer sealing, the outer diameter of the inner sealing 22 gradually increases along with approaching the mounting seat 21, the sealing effect is good, the valve can adapt to low-temperature valves with different calibers, and the applicability is wider; furthermore, the support frame 4 is arranged, so that rapid installation is convenient to realize; the height of the bearing seat 43 is adjustable, and the bearing seat 43 is provided with the V-shaped bearing groove 431, so that the low-temperature valve can adapt to low-temperature valves with different calibers, and the axial centers of two ends of the low-temperature valve are ensured to be superposed with the axial center of the first sealing head 2.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A low temperature valve gas tightness testing device, characterized in that includes:
a support;
a first sealing head mounted on the bracket;
the second sealing head is arranged on the bracket and is opposite to the first sealing head;
a drive structure to drive the first and second sealing heads toward each other to seal both ends of the cryogenic valve;
wherein the first sealing head comprises:
the outer seal is cylindrical with two open ends, and the inner diameter of the outer seal is larger than the outer diameters of the two ends of the low-temperature valve;
the mounting seat is connected with one end of the outer seal so as to seal one end of the outer seal; an air pipe is arranged on the mounting seat;
the inner seal is cylindrical, is arranged in the outer seal and is coaxial with the outer seal; the outer diameter of one end of the inner seal, which is far away from the mounting seat, is smaller than the inner diameters of two ends of the low-temperature valve, and the outer diameter of the inner seal gradually increases along with the approach of the inner seal to the mounting seat;
a channel communicated with the air pipe is arranged in the center of the axis of the inner seal;
wherein the second sealing head is identical to the first sealing head in structure.
2. The device for testing the airtightness of the low-temperature valve according to claim 1, further comprising a support bracket mounted on the support bracket for supporting the low-temperature valve; the support frame is slidable between the first sealing head and the second sealing head.
3. The low temperature valve airtightness testing apparatus according to claim 2, wherein the support frame comprises:
the sliding seat is slidably arranged on the bracket;
the connecting plate is connected with the sliding seat; the height of the connecting plate is adjustable;
the bearing seats are arranged on two sides of the connecting plate and correspond to the first sealing head and the second sealing head;
the bearing seat is provided with a bearing groove.
4. The low-temperature valve airtightness testing apparatus according to claim 3, wherein a plurality of screws are provided on the sliding seat; the connecting plate is arranged on the screw in a penetrating mode and is connected and fixed through nuts.
5. The device for testing the airtightness of the low-temperature valve according to claim 3, wherein the receiving groove has a "V" shape.
6. The low temperature valve airtightness testing apparatus according to claim 1, wherein the support includes:
a base plate;
the left side plate is arranged on the bottom plate;
the right side plate is arranged opposite to the left side plate;
a connecting rod connecting the left side plate and the right side plate;
wherein the first sealing head is mounted on the left side plate;
the second sealing head is slidably mounted on the connecting rod;
the drive structure is connected with the second sealing head.
7. The low temperature valve airtightness testing apparatus according to claim 6, wherein the driving structure comprises a pushing shaft;
wherein, the side surface of the right side plate is provided with a screw hole which runs through the right side plate;
the pushing shaft is in threaded connection with the screw hole, and one end of the pushing shaft penetrates through the right side plate and is movably connected with the second sealing head.
8. The low-temperature valve airtightness testing apparatus according to claim 1 or 6, wherein a lifting lug is further provided on the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223341829.7U CN218674100U (en) | 2022-12-14 | 2022-12-14 | Low temperature valve gas tightness testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223341829.7U CN218674100U (en) | 2022-12-14 | 2022-12-14 | Low temperature valve gas tightness testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218674100U true CN218674100U (en) | 2023-03-21 |
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ID=85551276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223341829.7U Active CN218674100U (en) | 2022-12-14 | 2022-12-14 | Low temperature valve gas tightness testing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218674100U (en) |
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2022
- 2022-12-14 CN CN202223341829.7U patent/CN218674100U/en active Active
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