Air pressurizing device for detecting air tightness of safety valve

Abstract

The utility model discloses an air pressurizing device for safety valve airtightness detection, and particularly relates to the technical field of safety valve detection, which comprises a detection box, one side of the detection box is fixedly connected with a first connecting pipe, the outer side of the first connecting pipe is provided with a plurality of chutes, and one end of the first connecting pipe is provided with a pressure maintaining sealing mechanism; the pressure maintaining sealing mechanism comprises a fixing ring, the fixing ring is fixedly connected with one end of a first connecting pipe, one side of the fixing ring is fixedly connected with a sealing gasket, the outer side of the first connecting pipe is movably connected with a first outer spacer ring, and a plurality of sliding blocks are fixedly connected into the first outer spacer ring. According to the utility model, through the arrangement of the pressure-maintaining sealing mechanism, the joint of the first connecting pipe and the second connecting pipe can be further sealed, so that when a certain gap exists between the first connecting pipe and the second connecting pipe during connection, the air tightness of the safety valve can still be stably detected; meanwhile, strong air pressure is prevented from being sprayed out from the joint of the first connecting pipe and the second connecting pipe, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valve detection, and more specifically, to an air pressurizing device for detecting air tightness of a safety valve. Background Art

[0002] A safety valve is a special valve that is normally closed under the action of external force. When the medium pressure in the equipment or pipeline exceeds the specified value, the medium is discharged to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. It is usually used in the transportation of natural gas and other gases. In order to ensure that the safety valve can be used normally, its air tightness needs to be tested after the safety valve is produced to prevent natural gas leakage, insufficient gas supply pressure, etc.

[0003] The existing safety valve air tightness detection method is basically to connect the gas pipeline to the safety valve, sink the safety valve into water, and pass gas into the safety valve, and judge the air tightness by observing whether bubbles are generated in the water. This detection method is time-consuming and labor-intensive. After the detection is completed, the safety valve needs to be subsequently dried and other operations are performed, and it is very easy to cause damage to the internal electrical components of the safety valve.

[0004] After searching, the Chinese patent with application number CN202222492807.4 discloses an air pressurizing device for air tightness detection of a safety valve. The utility model is provided with an air pressurizing component, and the impurities in the gas can be filtered by means of the filter screen at the front end of the air intake pipe to avoid damage to the air pump and the two-stage gas booster pump. After the subsequent gas is injected into the detection box, the air tightness of the safety valve body can be known by means of the changes in the pressure gauge. In addition, a two-stage gas booster pump is added to the air pump, so that high-pressure gas can be quickly obtained in the detection box, and the safety valve body can be strengthened. The detection, which can realize the air tightness detection of the safety valve body and the pressure resistance performance of the safety valve body can be detected at the same time.

[0005] However, when the above-mentioned air pressurizing device is actually used, due to the large number of types of safety valves, gaps may appear at the safety valve connections when installing and testing different safety valves, which may affect the detection accuracy of the safety valves. Utility Model Content

[0006] In order to overcome the above defects of the prior art, the utility model provides an air pressurizing device for detecting air tightness of a safety valve to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An air pressurizing device for detecting air tightness of a safety valve comprises a detection box, a first connecting pipe is fixedly connected to one side of the detection box, a plurality of slide grooves are provided on the outer side of the first connecting pipe, and a pressure-maintaining sealing mechanism is arranged at one end of the first connecting pipe; the pressure-maintaining sealing mechanism comprises a fixing ring, the fixing ring is fixedly connected to one end of the first connecting pipe, a sealing gasket is fixedly connected to one side of the fixing ring, a first outer spacer ring is movably connected to the outer side of the first connecting pipe, a plurality of sliding blocks are fixedly connected to the inside of the first outer spacer ring, a second connecting pipe is arranged at one end of the first connecting pipe, a second outer spacer ring is movably connected to the outer side of the second connecting pipe, threads are provided on the inner wall of the first outer spacer ring and the surface of the second spacer ring, two sealing rings are fixedly connected to the outer side of the second outer spacer ring, a fixing frame is movably connected to the outer side of the second outer spacer ring, screws are movably connected to the upper and lower sides of the fixing frame, and clamping blocks are movably connected to the bottoms of the two screws.

[0009] By adopting the above technical solution: the first spacer ring and the second spacer ring are threadedly connected to further seal the connection between the first connecting pipe and the second connecting pipe to avoid air pressure spraying due to unstable connection.

[0010] As a further description of the above technical solution:

[0011] A safety valve is arranged on one side of the detection box, a pressure relief pipe is installed on the front side of the detection box, a pressure gauge is fixedly connected to the outside of the detection box, and an air pump is installed on the top of the detection box.

[0012] By adopting the above technical solution: the pressure inside the detection box is increased, the sealing of the safety valve is tested, and the pressure inside the detection box is tested by a pressure gauge.

[0013] As a further description of the above technical solution:

[0014] An air intake pipe is fixedly connected to one side of the air pump, a base is fixedly connected to the bottom of the air intake pipe, a motor is installed inside the base, a cleaning rod is coaxially connected to the output end of the motor, an upper cover is movably connected to the top of the base, a plurality of springs are movably connected inside the upper cover, the other sides of the plurality of springs are fixedly connected to limiting blocks, two filters are movably connected to the bottom of the upper cover, and the two filters are symmetrically arranged at the bottom of the upper cover.

[0015] By adopting the above technical solution: filtering the air sucked in by the suction pump, the filter screen can be effectively cleaned and replaced.

[0016] Technical effects and advantages of the utility model:

[0017] 1. By setting up a pressure-maintaining sealing mechanism, compared with the prior art, the connection between the first connecting pipe and the second connecting pipe can be further sealed, so that when there is a certain gap between the first connecting pipe and the second connecting pipe, the air tightness test of the safety valve can still be stably performed, and at the same time, strong air pressure is prevented from being ejected from the connection between the first connecting pipe and the second connecting pipe, thereby improving safety;

[0018] 2. By setting the base, motor, cleaning rod, upper cover, spring, limit block and filter, compared with the prior art, the filter at the air inlet can be effectively cleaned, and the filter can be quickly replaced, so that the air pump maintains a good suction effect and the air pressure remains stable when the safety valve is detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the first connecting pipe of the utility model.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the second connecting pipe of the utility model.

[0022] Figure 4 It is a partial schematic diagram of the base connection of the utility model.

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the upper cover of the utility model.

[0024] Figure 6 For the utility model Figure 5 Schematic diagram of the structure of A.

[0025] The accompanying drawings are marked as follows: 1. detection box; 2. first connecting pipe; 3. slide groove; 4. fixing ring; 5. sealing gasket; 6. first outer spacer ring; 7. slider; 8. thread; 9. second connecting pipe; 10. second outer spacer ring; 11. sealing ring; 12. fixing frame; 13. screw; 14. clamping block; 15. safety valve; 16. pressure relief pipe; 17. pressure gauge; 18. air pump; 19. air inlet pipe; 20. base; 21. motor; 22. cleaning rod; 23. upper cover; 24. spring; 25. limit block; 26. filter. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The embodiment of the present application discloses an air pressurizing device for detecting air tightness of a safety valve, specifically comprising a detection box 1, a first connecting pipe 2 is fixedly connected to one side of the detection box 1, a plurality of slide grooves 3 are provided on the outer side of the first connecting pipe 2, and a pressure-maintaining sealing mechanism is arranged at one end of the first connecting pipe 2; the pressure-maintaining sealing mechanism comprises a fixing ring 4, the fixing ring 4 is fixedly connected to one end of the first connecting pipe 2, a sealing gasket 5 is fixedly connected to one side of the fixing ring 4, a first outer spacer ring 6 is movably connected to the outer side of the first connecting pipe 2, a plurality of slide blocks 7 are fixedly connected inside the first outer spacer ring 6, a second connecting pipe 9 is arranged at one end of the first connecting pipe 2, a second outer spacer ring 10 is movably connected to the outer side of the second connecting pipe 9, and a plurality of slide blocks 7 are fixedly connected inside the first outer spacer ring 6 The wall and the surface of the second spacer ring 10 are both provided with threads 8, two sealing rings 11 are fixedly connected to the outside of the second outer spacer ring 10, and a fixing frame 12 is movably connected to the outside of the second outer spacer ring 10. The upper and lower sides of the fixing frame 12 are movably connected with screws 13, and the bottoms of the two screws 13 are movably connected with clamping blocks 14, which can perform secondary sealing on the connection between the first connecting pipe 2 and the second connecting pipe 9. When there is a gap in the connection between the first connecting pipe 2 and the second connecting pipe 9, the first outer spacer ring 6 and the second outer spacer ring 10 can be connected to allow the safety valve 15 to continue to perform air tightness testing, while avoiding the enhanced air pressure spraying when the connection between the first connecting pipe 2 and the second connecting pipe 9 is unstable.

[0028] Reference Figure 1 As shown, specifically, a safety valve 15 is provided on one side of the detection box 1, a pressure relief pipe 16 is installed on the front side of the detection box 1, a pressure gauge 17 is fixedly connected to the outside of the detection box 1, and an air pump 18 is installed on the top of the detection box 1 to discharge the air pressure inside the detection box 1 to avoid explosion due to excessive air pressure, to pressurize the inside of the detection box 1, and to detect the air pressure stability inside the detection box 1.

[0029] Reference Figure 4 As shown, specifically, an air intake pipe 19 is fixedly connected to one side of the air pump 18, a base 20 is fixedly connected to the bottom of the air intake pipe 19, a motor 21 is installed inside the base 20, and a cleaning rod 22 is coaxially connected to the output end of the motor 21, which can reciprocately clean the filter to prevent dust from clogging the filter when the air pump 18 is inhaling air.

[0030] Reference Figure 5As shown, specifically, a top cover 23 is movably connected to the top of the base 20 and connected to the base 20 so that the two filters 26 can overlap with the inner wall of the air inlet pipe 19.

[0031] Reference Figure 6 As shown, specifically, a plurality of springs 24 are movably connected inside the upper cover 23, and the other sides of the plurality of springs 24 are fixedly connected to limit blocks 25. Two filters 26 are movably connected to the bottom of the upper cover 23, and the two filters 26 are symmetrically arranged at the bottom of the upper cover 23. The filters 26 can be quickly connected, and the filters 26 are easy to replace and clean.

[0032] Working principle of the utility model: when testing the air tightness of the safety valve, first connect the second connecting pipe 9 on one side of the safety valve 15 with the other end of the first connecting pipe 2, then push the second outer spacer ring 10 and the fixing frame 12 to move to the appropriate position on the outside of the second connecting pipe 9, first rotate the two screws 13 to drive the clamping block 14 to fix the second outer spacer ring 10 on the outside of the second connecting pipe 9, and then rotate the second outer spacer ring 10 to threadably connect with the thread 8 on the outside of the first outer spacer ring 6. When the second outer spacer ring 10 is threadably connected with the first outer spacer ring 6, the first outer spacer ring 6 is driven by the second outer spacer ring 10 to move to one side of the second outer spacer ring 10. During the movement of the first outer spacer ring 6, a plurality of sliders 7 on one side of the first outer spacer ring 6 slide on the outer groove 3 of the first connecting pipe 2, so that the first outer spacer ring 6 can be tightened. One side of the spacer ring 6 contacts the sealing gasket 5 on the side of the fixing ring 4. In the process of the first outer spacer ring 6 continuously moving toward the second outer spacer ring 10, the sealing gasket 5 is squeezed inside the first outer spacer ring 6 to deform the sealing gasket 5, thereby sealing the gap between the first outer spacer ring 6 and the fixing ring 4. The first outer spacer ring 6 and the second outer spacer ring 10 seal the connection between the first connecting pipe 2 and the second connecting pipe 9 again to avoid the unstable connection between the first connecting pipe 2 and the second connecting pipe 9 causing air pressure to be ejected. After that, after the air pump 18 has been running for a long time, the cleaning rod 22 is driven by the motor 21 to clean the filter screen 26 on the front side of the upper cover 23, so that the air pump 18 can inhale air evenly, and then the filter screen 26 is clamped by multiple springs 24 and limit blocks 25, so that the filter screen 26 can be quickly replaced.

[0033] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air pressurizing device for testing the air tightness of a safety valve, comprising a testing box (1), characterized in that: A first connecting pipe (2) is fixedly connected to one side of the detection box (1), a plurality of sliding grooves (3) are provided on the outside of the first connecting pipe (2), and a pressure-maintaining sealing mechanism is provided at one end of the first connecting pipe (2); The pressure-maintaining sealing mechanism includes a fixing ring (4), which is fixedly connected to one end of the first connecting tube (2), a sealing gasket (5) is fixedly connected to one side of the fixing ring (4), a first outer spacer ring (6) is movably connected to the outside of the first connecting tube (2), a plurality of sliders (7) are fixedly connected inside the first outer spacer ring (6), a second connecting tube (9) is provided at one end of the first connecting tube (2), a second outer spacer ring (10) is movably connected to the outside of the second connecting tube (9), a thread (8) is provided on the inner wall of the first outer spacer ring (6) and the surface of the second outer spacer ring (10), two sealing rings (11) are fixedly connected to the outside of the second outer spacer ring (10), a fixing frame (12) is movably connected to the outside of the second outer spacer ring (10), screws (13) are movably connected to the upper and lower sides of the fixing frame (12), and clamping blocks (14) are movably connected to the bottoms of the two screws (13).

2. The air pressurizing device for testing the air tightness of a safety valve according to claim 1, characterized in that: A safety valve (15) is provided on one side of the detection box (1), and a pressure relief pipe (16) is installed on the front side of the detection box (1).

3. The air pressurizing device for testing the air tightness of a safety valve according to claim 1, characterized in that: A pressure gauge (17) is fixedly connected to the outside of the detection box (1), and an air pump (18) is installed on the top of the detection box (1).

4. The air pressurizing device for testing the air tightness of a safety valve according to claim 3, characterized in that: An air intake pipe (19) is fixedly connected to one side of the air pump (18), a base (20) is fixedly connected to the bottom of the air intake pipe (19), and a motor (21) is installed inside the base (20).

5. The air pressurizing device for testing the air tightness of a safety valve according to claim 4, characterized in that: The output end of the motor (21) is coaxially connected to a cleaning rod (22), and the top of the base (20) is movably connected to an upper cover (23).

6. The air pressurizing device for testing the air tightness of a safety valve according to claim 5, characterized in that: A plurality of springs (24) are movably connected inside the upper cover (23), and the other sides of the plurality of springs (24) are fixedly connected to a limiting block (25).

7. The air pressurizing device for testing the air tightness of a safety valve according to claim 6, characterized in that: The bottom of the upper cover (23) is movably connected to two filter screens (26), and the two filter screens (26) are symmetrically arranged on the bottom of the upper cover (23).

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