Vacuum valve body sealing performance detector

Abstract

The utility model discloses a vacuum valve body sealing performance detector, which effectively facilitates the connection between a helium detector and a vacuum valve body, and comprises the helium detector for detecting the sealing performance and a connecting plate for connecting the vacuum valve body, the connecting plate is detachably connected to the upper side of the helium detector, and the connecting plate is detachably connected to the lower side of the helium detector. A first sealing ring is arranged on the side, away from the helium detector, of the connecting plate, a connecting block is fixedly connected to the upper side of the connecting plate, an expandable expansion belt is fixedly connected to the middle of the connecting block, and a plurality of second sealing rings fixedly arranged on the outer side of the connecting block in a sleeving mode are arranged on the upper side of the expansion belt. The device is simple and convenient to operate, effectively improves the sealing performance detection precision, facilitates the operation of a worker, achieves a better sealing effect, facilitates the cooperation between the device and a vacuum valve body, facilitates the connection between the vacuum valve body and a helium detector, and achieves a better sealing effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of leakproofness detection, and relates to a vacuum valve body leakproofness detector. BACKGROUND

[0002] Vacuum valve is the vacuum system element used for changing airflow direction, adjusting air flow size, cutting off or connecting pipeline in vacuum system.

[0003] After the vacuum valve body is shipped, the leak rate needs to be detected, at which time the leak rate can be detected through the helium detector, but the detection interface of the helium detector is generally circular and fixed in size, and it is inconvenient for the staff to install and detect in the process of connecting with the vacuum valve body, therefore a vacuum valve body leakproofness detector is needed to solve the above problems to connect the vacuum valve body and the helium detector on the basis of ensuring the air tightness. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model provides a vacuum valve body leakproofness detector, which solves the problems in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A vacuum valve body leakproofness detector, comprising a helium detector for detecting leakproofness and a connecting plate for connecting the vacuum valve body, the connecting plate being detachably connected to the upper side of the helium detector, a first sealing ring being fixedly connected to the side of the connecting plate away from the helium detector, a connecting block being fixedly connected to the upper side of the connecting plate, an inflatable expansion belt being fixedly connected to the middle part of the connecting block, a plurality of second sealing rings being arranged on the upper side of the expansion belt and fixedly sleeved on the outer side of the connecting block, the first sealing ring and the second sealing ring both abutting against the vacuum valve body.

[0007] Preferably, the cross section of each second sealing ring is arc-shaped, a first annular groove is formed in the inside of the connecting block, the expansion belt is fixedly connected to the outer side of the upper and lower end faces of the first annular groove, a second annular groove is formed in the inside of the connecting block and the connecting plate, and a plurality of first communication grooves are formed between the first annular groove and the second annular groove.

[0008] Preferably, a plurality of pressure blocks that can move up and down are arranged on the side of the connecting plate away from the helium detector, a plurality of pressurizing grooves corresponding to the pressure blocks are formed in the inside of the connecting plate, a piston is slidably connected to the inside of each pressurizing groove, and the lower side of each pressure block is fixedly connected to the corresponding piston.

[0009] Preferably, each of the pressurizing grooves is provided with a second communication groove near one side of the second annular groove, and each of the second communication grooves communicates with the second annular groove near one side of the second annular groove.

[0010] Preferably, the connecting plate is provided with a plurality of fixing holes in a circumferential array.

[0011] Preferably, the lower side of the connecting plate is fixedly connected with a first connecting sleeve, the lower side of the first connecting sleeve is fixedly connected with a dismounting plate, the upper side of the helium detector is fixedly connected with a second connecting sleeve, the upper side of the second connecting sleeve is fixedly connected with a fixing plate, and the dismounting plate is detachably connected with the fixing plate.

[0012] Preferably, the lower side of the dismounting plate is provided with a sealing groove, and the sealing groove is internally provided with a third sealing ring, and the lower side of the third sealing ring abuts against the upper side of the fixing plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model has a first sealing ring, in the process of pressing the connecting plate and the side end face of the valve body, the first sealing ring can press the plane between the end face of the connecting plate and the side end face of the valve body, so as to increase the sealing performance of the two.

[0015] 2. The utility model has a second sealing ring and an inflatable expansion belt, in the process of pressing and connecting the connecting plate and the valve body, the expansion belt is inflated, and then the inside of the second sealing ring is pressed outward, so that the outside of the corresponding second sealing ring can abut against the inner side wall of the valve body aperture, realizing the sealing between the second sealing ring and the inner hole of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a use state schematic view of the utility model.

[0017] Figure 2 It is an explosion structure schematic view of the connecting plate and the vacuum valve body in the utility model.

[0018] Figure 3 It is an explosion structure schematic view of the dismounting plate and the fixing plate in the utility model.

[0019] Figure 4 It is an internal structure schematic view of the connecting plate in the utility model.

[0020] Figure 5 It is a local enlarged schematic view of area A in the utility model. Figure 4

[0021] ​In the diagram: 1. Helium detector; 2. Connecting plate; 3. First sealing ring; 4. Connecting block; 5. Expansion band; 6. Second sealing ring; 7. First annular groove; 8. Second annular groove; 9. First connecting groove; 10. Pressing block; 11. Pressurizing groove; 12. Piston; 13. Second connecting groove; 14. Fixing hole; 15. First connecting sleeve; 16. Disassembly plate; 17. Second connecting sleeve; 18. Fixing plate; 19. Sealing groove; 20. Third sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The following is in conjunction with the appendix Figures 1 to 5 The specific embodiments of this utility model will be described in further detail.

[0024] Depend on Figures 1 to 5 As shown, this utility model includes a helium detector 1 for testing sealing performance and a connecting plate 2 for connecting the vacuum valve body. To facilitate the connection between the helium detector 1 and the vacuum valve body, the connecting plate 2 is detachably connected to the upper side of the helium detector 1. A first sealing ring 3 is fixedly connected to the side of the connecting plate 2 away from the helium detector 1. A connecting block 4 is fixedly connected to the upper side of the connecting plate 2. An expandable expansion band 5 is fixedly connected to the middle of the connecting block 4. Multiple second sealing rings 6 are fixedly fitted on the upper side of the expansion band 5 and are fitted on the outside of the connecting block 4. The first sealing ring 3 and the second sealing ring 6 are both in contact with the vacuum valve body.

[0025] In this embodiment, the vacuum valve body is a vacuum valve of model 091 series. In actual use, the dimensions of the connecting plate 2 and the connecting block 4 can be adaptively adjusted according to the actual valve body orifice size to be detected, which will not be described in detail here. The helium detector 1 is a helium mass spectrometer leak detector, which is existing technology. In this embodiment, the helium mass spectrometer leak detector of model SFJ-261 is used, which will not be described in detail here.

[0026] In use, the connecting plate 2 and the vacuum valve body can be connected by bolts, at this time, the connecting block 4 and each second sealing ring 6 are located inside the hole diameter of the vacuum valve body, and in the process of pressing connection between the connecting plate 2 and the valve body, the expansion belt 5 is expanded, and then the inside of the second sealing ring 6 is pressed outward, so that the outside of the corresponding second sealing ring 6 can abut against the inner side wall of the valve body hole diameter, and the first resealing is performed through the second sealing ring 6, and in the process of pressing connection between the connecting plate 2 and the valve body side end face, the first sealing ring 3 can press the plane between the connecting plate 2 end face and the valve body side end face, and the second resealing is performed, and through the two resealings, the sealing detection precision of the vacuum valve body can be improved.

[0027] Further, as shown in Figures 1 to 5 in order to improve the sealing detection precision, the cross section of each second sealing ring 6 is arc-shaped, the inside of the connecting block 4 is provided with a first annular groove 7, the expansion belt 5 is fixedly connected to the outside of the upper and lower end faces of the first annular groove 7, the inside of the connecting block 4 and the connecting plate 2 is provided with a second annular groove 8, and a plurality of first communication grooves 9 are arranged between the first annular groove 7 and the second annular groove 8.

[0028] Further, as shown in Figures 1 to 5 in order to facilitate the operation of the staff, the side of the connecting plate 2 away from the helium detector 1 is provided with a plurality of press blocks 10 which can move up and down, the inside of the connecting plate 2 is provided with a press groove 11 corresponding to each press block 10, the inside of each press groove 11 is slidably connected with a piston 12, and the lower side of each press block 10 is fixedly connected with the corresponding piston 12.

[0029] Further, as shown in Figures 1 to 5 in order to achieve better sealing effect, each press groove 11 is provided with a second communication groove 13 on the side close to the second annular groove 8, and the side of each second communication groove 13 close to the second annular groove 8 is in communication with the second annular groove 8.

[0030] Further, as shown in Figures 1 to 5 in order to facilitate the cooperation of the device with the vacuum valve body, a plurality of fixing holes 14 are arranged on the circumference of the connecting plate 2.

[0031] In use, the position of the fixing hole 14 is matched with the position of the mounting hole of the valve body end face, the connecting plate 2 can be connected with the valve body end face through bolts, in the process of pressing the bolts, the valve body end face of the vacuum valve is pressed to move the pressing block 10 downward, thereby driving the plurality of pistons 12 to move downward together, when the pistons 12 move downward, the pistons 12 push the hydraulic oil in the pressurizing groove 11 to enter the second annular groove 8 through the second communication groove 13, thereby making the hydraulic oil in the second annular groove 8 enter the inside of the first annular groove 7 through the first communication groove 9, pressurizing the inside of the first annular groove 7 and increasing the pressure in the inside of the first annular groove 7, since the expansion belt 5 is made of rubber and can be elastically deformed, when the pressure in the inside of the first annular groove 7 increases, the expansion belt 5 expands outward, thereby tightly abutting the inside of the second sealing ring 6.

[0032] Further, as shown in Figures 1 to 5 In order to facilitate the connection of the vacuum valve body and the helium detector 1, the lower side of the connecting plate 2 is fixedly connected with a first connecting sleeve 15, the lower side of the first connecting sleeve 15 is fixedly connected with a dismounting plate 16, the upper side of the helium detector 1 is fixedly connected with a second connecting sleeve 17, the upper side of the second connecting sleeve 17 is fixedly connected with a fixed plate 18, and the dismounting plate 16 and the fixed plate 18 are detachably connected.

[0033] It should be noted that through holes are formed in the dismounting plate 16 and the fixed plate 18, the dismounting plate 16 and the fixed plate 18 are connected through bolts, and in addition, the end faces of the dismounting plate 16 and the fixed plate 18 are chamfered, and the two can also be connected by using a tooth ring pipeline connector, which facilitates dismounting.

[0034] Further, as shown in Figures 1 to 5 In order to achieve better sealing effect, a sealing groove 19 is formed in the lower side of the dismounting plate 16, a third sealing ring 20 is arranged in the inside of the sealing groove 19, and the lower side of the third sealing ring 20 abuts against the upper side of the fixed plate 18.

[0035] In use, the connecting plate 2 is first connected with the vacuum valve body through bolts, at this time, the connecting block 4 and each second sealing ring 6 are located in the bore diameter of the vacuum valve body, in the process of pressing connection of the connecting plate 2 and the valve body, the expansion belt 5 is expanded, thereby pressing the inside of the second sealing ring 6 outward, so that the outer side surface of the corresponding second sealing ring 6 can abut against the inner side wall of the valve body bore diameter, and the first resealing is realized through the second sealing ring 6, in the process of pressing connection of the connecting plate 2 and the valve body side end face, the first sealing ring 3 can press the plane between the end face of the connecting plate 2 and the valve body side end face, thereby realizing the second resealing, and through the two resealings, the sealing property detection precision of the vacuum valve body can be improved.

[0036] The utility model discloses novel structure, clever idea, simple and convenient operation, through this design effectively facilitated the connection between helium detector 1 and vacuum valve body, improved the sealing detection precision, facilitated the operation of staff, reached better sealing effect, facilitated the cooperation of device and vacuum valve body, facilitated the connection of vacuum valve body and helium detector 1, realized better sealing effect.

[0037] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vacuum valve body sealing performance tester, comprising a helium detector for testing sealing performance and a connecting plate for connecting to the vacuum valve body, characterized in that: The connecting plate is detachably connected to the upper side of the helium detector. A first sealing ring is fixedly connected to the side of the connecting plate away from the helium detector. A connecting block is fixedly connected to the upper side of the connecting plate. An expandable expansion band is fixedly connected to the middle of the connecting block. Multiple second sealing rings are fixedly fitted on the upper side of the expansion band and mounted on the outside of the connecting block. Both the first and second sealing rings abut against the vacuum valve body.

2. The vacuum valve body sealing performance tester according to claim 1, characterized in that: Each of the second sealing rings has an arc-shaped cross-section. The connecting block has a first annular groove inside. The expansion band is fixedly connected to the outer side of the upper and lower end faces of the first annular groove. The connecting block and the connecting plate have a second annular groove inside. Multiple first connecting grooves are formed between the first annular groove and the second annular groove.

3. The vacuum valve body sealing tester according to claim 2, characterized in that: The connecting plate has multiple pressing blocks that can move up and down on the side away from the helium detector. The connecting plate has pressure grooves that correspond one-to-one with the pressing blocks. Each pressure groove has a piston that is slidably connected inside. The lower side of each pressing block is fixedly connected to the corresponding piston.

4. The vacuum valve body sealing tester according to claim 3, characterized in that: Each of the pressurizing grooves has a second connecting groove on the side near the second annular groove, and the side of each second connecting groove near the second annular groove is connected to the second annular groove.

5. The vacuum valve body sealing tester according to claim 1, characterized in that: The connecting plate has multiple fixing holes arranged in a circular array.

6. The vacuum valve body sealing tester according to claim 1, characterized in that: A first connecting sleeve is fixedly connected to the lower side of the connecting plate, and a disassembly plate is fixedly connected to the lower side of the first connecting sleeve. A second connecting sleeve is fixedly connected to the upper side of the helium detector, and a fixing plate is fixedly connected to the upper side of the second connecting sleeve. The disassembly plate and the fixing plate are detachably connected.

7. A vacuum valve body sealing performance tester according to claim 6, characterized in that: The lower side of the disassembly plate is provided with a sealing groove, and a third sealing ring is provided inside the sealing groove. The lower side of the third sealing ring abuts against the upper side of the fixing plate.

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