Valve airtightness detection equipment

Abstract

The utility model belongs to the field of valve airtightness detection, and particularly relates to valve airtightness detection equipment, which comprises an operation table, a display assembly is arranged on one side of the operation table, a pre-positioning mechanism is arranged at the top of the operation table, the pre-positioning mechanism comprises a support table, the support table is fixedly connected to the top of the operation table, and the display assembly is arranged on the other side of the operation table. The inner wall of the supporting table is rotationally connected with a rotating rod. By arranging the pre-positioning mechanism, valves with different pipe diameters are supported from the inner sides, transverse supporting force is provided for the valves, and the valves are prevented from displacement during inflation, so that pre-positioning of the valves is achieved, the butt joint accuracy of valve ports and inflation ports is ensured, interference to air pressure is avoided, the accuracy of detection results is ensured, and the detection efficiency is improved. And a sealing plate and a sealing gasket are arranged, so that the third port of the three-way valve is in a sealing state when making contact with the supporting table, positioning of the three-way valve is achieved, blocking of the third port of the three-way valve is achieved, and the utilization rate of resources is increased.

Description

Technical Field

[0001] The utility model relates to the field of valve sealing detection, in particular to a valve air tightness detection device. Background Art

[0002] A valve is a device or equipment used to control, regulate and stop the flow of fluid (gas, liquid, steam, etc.). The fluid is turned on and off by opening or closing the valve, and the flow, pressure or temperature of the fluid can be controlled by adjusting the valve opening. Therefore, the sealing of the valve is very important. At this time, a valve air tightness detection device will be used.

[0003] When testing the air tightness of the valve by an air tightness tester, first close the valve and connect the air tightness tester to the valve to ensure that the connection between the test equipment and the valve is reliably sealed. Then apply air pressure and use the air source to inject compressed air or nitrogen into the valve. Gradually increase the pressure until the preset test pressure is reached. At this time, the valve should be in a closed state. Finally, observe the pressure change. Once the test pressure is reached, observe the indicator on the test equipment. If the pressure displayed by the pressure indicator remains stable, it indicates that the valve has good sealing performance. If the pressure drops, it indicates that the valve is leaking. However, when testing the valve, it is necessary to squeeze and inflate the port of the valve. When the valve is placed, there is insufficient support force in the lateral direction, which causes the valve to be displaced when the valve is squeezed and inflated, resulting in a displacement deviation between the valve port and the inflation port, affecting the accuracy of the air pressure and causing inaccurate test results. When testing the three-way valve, the three ports need to be blocked, which increases the waste of resources. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, when testing the valve, it is necessary to squeeze and inflate the port of the valve. When the valve is placed, there is a lack of sufficient lateral support force, which causes the valve to be displaced when the valve is squeezed and inflated. This causes a displacement deviation between the valve port and the inflation port, affecting the accuracy of the air pressure and causing inaccurate test results. The utility model proposes a valve air tightness testing device.

[0005] The utility model solves the technical problem by adopting the following technical solution: a valve air tightness detection device, comprising an operating table, the top of the operating table is fixedly connected with an L-shaped plate, the number of the L-shaped plates is two, the top of the L-shaped plate is fixedly connected with a hydraulic cylinder, the telescopic end of the hydraulic cylinder is slidably connected with the inner wall of the L-shaped plate, the telescopic end of the hydraulic cylinder is fixedly connected with a vent head, a display component is arranged on one side of the operating table, and a pre-positioning mechanism is arranged on the top of the operating table;

[0006] The pre-positioning mechanism includes a support table, which is fixedly connected to the top of the operating table, the inner wall of the support table is rotatably connected to a rotating rod, the surface of the rotating rod is rotatably connected to the inner wall of the operating table, the top of the rotating rod is fixedly connected to a turntable, the top of the turntable is provided with an arc hole, the number of the arc holes is four, the inner cavity of the arc hole is slidably connected to a guide rod, the top of the guide rod is fixedly connected to a positioning block, the top of the support table is provided with a guide hole, the number of the guide holes is four, the surface of the guide rod is slidably connected to the inner cavity of the guide hole, the surface of the rotating rod is fixedly connected to a first gear, the top of the operating table is rotatably connected to a rotating column, the top of the rotating column is fixedly connected to a second gear, the teeth of the second gear are meshed with the teeth of the first gear, and the top of the second gear is fixedly connected to a rotating knob.

[0007] Preferably, a sealing plate is fixedly connected to the bottom of the support platform, and the sealing plate and the support platform are fixedly connected by screws.

[0008] Preferably, a limiting block is fixedly connected to the bottom of the guide rod, a limiting groove is provided on the top of the sealing plate, and a surface of the limiting block is slidably connected to an inner cavity of the limiting groove.

[0009] By setting the limit block and the limit groove, the vertical movement distance of the guide rod is limited by the embedding of the two, so as to prevent the guide rod from vertically moving out of the inner cavity of the guide groove, thereby increasing the stability of the guide rod when moving;

[0010] Preferably, a positioning hole is provided on the top of the second gear, the number of the positioning holes is several, the inner cavity of the positioning hole is provided with a bolt, and a positioning groove is provided on the top of the operating table, and the surface of the bolt is threadedly connected to the inner cavity of the positioning groove.

[0011] Preferably, an anti-skid pad is fixedly connected to the inner side of the positioning block, and the anti-skid pad is made of silicone material.

[0012] By setting up the anti-skid pad, the friction between the positioning block and the valve surface is increased, and the stability of the valve pre-positioning is increased. By using the silicone material, the softness of the silicone fills the gap between the positioning block and the valve surface, making the contact between the positioning block and the valve closer, and increasing the grip on the valve.

[0013] Preferably, a sealing gasket is provided on the contact surface between the top of the sealing plate and the support platform and the top of the turntable, and the sealing gasket is made of rubber material.

[0014] Preferably, the bottom of the operating table is fixedly connected with supporting feet, and the number of the supporting feet is four.

[0015] The utility model is beneficial in that:

[0016] The utility model provides a pre-positioning mechanism to support valves of different pipe diameters from the inside, provides a lateral supporting force therefor, avoids displacement of the valve during inflation, thereby achieving the pre-positioning of the valve, ensuring the docking accuracy of the valve port and the inflation port, avoiding interference with the air pressure, and ensuring the accuracy of the detection result; and by providing a sealing plate and a sealing gasket, the third port of the three-way valve is in a sealed state when in contact with the support platform, which not only achieves the positioning of the three-way valve, but also achieves the blocking of the third port of the three-way valve, thereby increasing the utilization rate of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is an exploded schematic diagram of the pre-positioning mechanism of the utility model;

[0020] Figure 3 It is a cross-sectional stereoscopic schematic diagram of the limit block and the limit groove of the utility model;

[0021] Figure 4 It is a three-dimensional schematic diagram of the positioning groove and the bolt of the utility model.

[0022] In the figure: 1. operating table; 2. display assembly; 3. pre-positioning mechanism; 301. support table; 302. rotating rod; 303. turntable; 304. arc hole; 305. guide rod; 306. positioning block; 307. guide hole; 308. first gear; 309. rotating column; 310. second gear; 311. knob; 4. sealing plate; 5. sealing gasket; 6. limit block; 7. limit groove; 8. positioning hole; 9. bolt; 10. positioning groove; 11. anti-slip pad; 12. L-shaped plate; 13. hydraulic cylinder; 14. vent head; 15. supporting foot. DETAILED DESCRIPTION

[0023] 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.

[0024] The following is combined with Figure 1-4 To further explain this application in detail,

[0025] The present application embodiment discloses a valve air tightness detection device. Figure 1 and Figure 2 A valve air tightness detection device comprises an operating table 1, an L-shaped plate 12 is fixedly connected to the top of the operating table 1, the number of the L-shaped plates 12 is two, a hydraulic cylinder 13 is fixedly connected to the top of the L-shaped plate 12, the telescopic end of the hydraulic cylinder 13 is slidably connected to the inner wall of the L-shaped plate 12, a vent head 14 is fixedly connected to the telescopic end of the hydraulic cylinder 13, a display component 2 is arranged on one side of the operating table 1, and a pre-positioning mechanism 3 is arranged on the top of the operating table 1;

[0026] The pre-positioning mechanism 3 includes a support platform 301, which is fixedly connected to the top of the operating table 1. The inner wall of the support platform 301 is rotatably connected to a rotating rod 302. The surface of the rotating rod 302 is rotatably connected to the inner wall of the operating table 1. A rotating disk 303 is fixedly connected to the top of the rotating rod 302. The top of the rotating disk 303 is provided with an arc hole 304. The number of the arc holes 304 is four. The inner cavity of the arc hole 304 is slidably connected to a guide rod 305. The top of the guide rod 305 is fixedly connected to a positioning block 30 6. A guide hole 307 is provided on the top of the support platform 301, and the number of the guide holes 307 is four. The surface of the guide rod 305 is slidably connected to the inner cavity of the guide hole 307. The surface of the rotating rod 302 is fixedly connected to the first gear 308. The top of the operating table 1 is rotatably connected to a rotating column 309. The top of the rotating column 309 is fixedly connected to a second gear 310. The teeth of the second gear 310 are meshed with the teeth of the first gear 308. The top of the second gear 310 is fixedly connected to a knob 311.

[0027] Reference Figure 3 The bottom of the support platform 301 is fixedly connected with a sealing plate 4, and the sealing plate 4 is fixedly connected to the support platform 301 by screws. By setting the sealing plate 4, the guide hole 307 at the top of the support platform 301 can be sealed, reducing the fluidity of the air in the guide hole 307, increasing the sealing performance during detection, and improving the accuracy of detection;

[0028] Reference Figure 3The bottom of the guide rod 305 is fixedly connected to the limiting block 6, and the top of the sealing plate 4 is provided with a limiting groove 7. The surface of the limiting block 6 is slidably connected to the inner cavity of the limiting groove 7. By setting the limiting block 6 and the limiting groove 7, the vertical movement distance of the guide rod 305 is limited by the embedding of the two, so as to prevent the guide rod 305 from vertically moving out of the inner cavity of the guide groove, thereby increasing the stability of the guide rod 305 when moving;

[0029] Reference Figure 4 A positioning hole 8 is provided on the top of the second gear 310, and the number of the positioning holes 8 is several. A bolt 9 is provided in the inner cavity of the positioning hole 8. A positioning groove 10 is provided on the top of the operating table 1. The surface of the bolt 9 is threadedly connected with the inner cavity of the positioning groove 10. By providing the positioning hole 8, the bolt 9 and the positioning groove 10, when the second gear 310 rotates a certain number of times, the user passes the bolt 9 through the positioning hole 8 and screws the bolt 9 so that the bolt 9 is embedded in the inner cavity of the positioning groove 10, thereby realizing the positioning of the rotation angle of the second gear 310;

[0030] Reference Figure 2 The inner side of the positioning block 306 is fixedly connected with an anti-skid pad 11, which is made of silicone material. By setting the anti-skid pad 11, the friction between the positioning block 306 and the valve surface is increased, and the stability of the valve pre-positioning is increased. In addition, by using silicone material, the gap between the positioning block 306 and the valve surface is filled by the softness of silicone, so that the contact between the positioning block 306 and the valve is closer, and the gripping force on the valve is increased;

[0031] Reference Figure 3 The contact surface between the top of the sealing plate 4 and the support table 301 and the top of the turntable 303 are both provided with a sealing gasket 5, and the sealing gasket 5 is made of rubber material. By providing the sealing gasket 5, the flexibility of the rubber is utilized to fill the gap between the sealing plate 5 and the support table 301, thereby avoiding air leakage during detection, thereby improving the accuracy of detection;

[0032] Reference Figure 1 The bottom of the operating table 1 is fixedly connected with supporting feet 15, and the number of supporting feet 15 is four. By providing the supporting feet 15, the bottom of the operating table 1 is supported, and the pressure of the bottom of the operating table 1 on the placement surface is increased, thereby increasing the stability of the operating table 1 when it is placed;

[0033] Working principle: When testing the air tightness of the three-way valve, place one of the ports of the three-way valve downward at the center of the turntable 303, press the three-way valve downward to apply appropriate pressure, and the user turns the knob 311 with one hand. The rotation of the knob 311 drives the second gear 310 and the rotating column 309 to rotate, and the rotation of the second gear 310 drives the first gear 308 to rotate. The rotation of the first gear 308 drives the rotating rod 302 to rotate, and the rotation of the rotating rod 302 drives the turntable 303 to rotate. The rotation of the turntable 303 drives the arc hole 304 to drive the guide rod 305. Through the linear guidance of the guide hole 307, the guide rod 305 performs a linear displacement on the top of the support platform 301. The movement of the guide rod 305 drives the positioning block 306 to squeeze the surface of the three-way valve. When the knob 311 is rotated to the point where it can no longer rotate, the second gear 310 is positioned by the bolt 9, and then Through the power switch, the hydraulic cylinder 13 on the top of the L-shaped plate 12 is controlled, and the ventilation head 14 is pushed toward the three-way valve by extending the telescopic end of the hydraulic cylinder 13 until the two ventilation heads 14 are in close contact with the two opposite ports of the three-way valve. An air inlet pipe is arranged on the top of the ventilation head 14, and the air inlet pipe is connected to the external air source to inflate the inner cavity of the ventilation head 14. The inflated gas enters the inner cavity of the three-way valve through the ventilation head 14. The inner cavity of the ventilation head 14 is provided with an air pressure sensor, and the air pressure sensor is electrically connected to the display component 2. The air pressure sensor monitors the gas pressure in real time and transmits the monitored air pressure data to the display component. The pressure is gradually increased during ventilation until the preset test pressure is reached. At this time, the three-way valve should be in a closed state. Finally, the pressure change is observed. Once the test pressure is reached, the display component 2 is observed. If the displayed pressure remains stable, it indicates that the three-way valve has good sealing performance. If the pressure drops, it indicates that the valve is leaking.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A valve air tightness detection device, characterized in that: The operating table (1) comprises an operating table (1), wherein the top of the operating table (1) is fixedly connected to an L-shaped plate (12), the number of the L-shaped plates (12) is two, the top of the L-shaped plate (12) is fixedly connected to a hydraulic cylinder (13), the telescopic end of the hydraulic cylinder (13) is slidably connected to the inner wall of the L-shaped plate (12), the telescopic end of the hydraulic cylinder (13) is fixedly connected to a vent head (14), a display component (2) is arranged on one side of the operating table (1), and a pre-positioning mechanism (3) is arranged on the top of the operating table (1); The pre-positioning mechanism (3) comprises a support platform (301), wherein the support platform (301) is fixedly connected to the top of the operating platform (1), the inner wall of the support platform (301) is rotatably connected to a rotating rod (302), the surface of the rotating rod (302) is rotatably connected to the inner wall of the operating platform (1), the top of the rotating rod (302) is fixedly connected to a rotating disk (303), the top of the rotating disk (303) is provided with an arc-shaped hole (304), the number of the arc-shaped holes (304) is four, the inner cavity of the arc-shaped hole (304) is slidably connected to a guide rod (305), the top of the guide rod (305) is fixedly connected to a positioning block ( 306), a guide hole (307) is opened on the top of the support platform (301), and the number of the guide holes (307) is four. The surface of the guide rod (305) is slidably connected to the inner cavity of the guide hole (307), and the surface of the rotating rod (302) is fixedly connected to the first gear (308). The top of the operating table (1) is rotatably connected to a rotating column (309), and the top of the rotating column (309) is fixedly connected to a second gear (310), and the teeth of the second gear (310) are meshed with the teeth of the first gear (308), and the top of the second gear (310) is fixedly connected to a knob (311).

2. A valve air tightness detection device according to claim 1, characterized in that: A sealing plate (4) is fixedly connected to the bottom of the support platform (301), and the sealing plate (4) and the support platform (301) are fixedly connected via screws.

3. A valve air tightness detection device according to claim 2, characterized in that: The bottom of the guide rod (305) is fixedly connected to a limiting block (6), the top of the sealing plate (4) is provided with a limiting groove (7), and the surface of the limiting block (6) is slidably connected to the inner cavity of the limiting groove (7).

4. A valve air tightness detection device according to claim 1, characterized in that: A positioning hole (8) is provided at the top of the second gear (310), and the number of the positioning holes (8) is several. The inner cavity of the positioning hole (8) is provided with a bolt (9). A positioning groove (10) is provided at the top of the operating table (1), and the surface of the bolt (9) is threadedly connected to the inner cavity of the positioning groove (10).

5. The valve air tightness detection device according to claim 1, characterized in that: An anti-skid pad (11) is fixedly connected to the inner side of the positioning block (306), and the anti-skid pad (11) is made of silica gel.

6. A valve air tightness detection device according to claim 2, characterized in that: The contact surface between the top of the sealing plate (4) and the support platform (301) and the top of the rotating disk (303) are both provided with sealing pads (5), and the sealing pads (5) are made of rubber material.

7. A valve air tightness detection device according to claim 1, characterized in that: The bottom of the operating table (1) is fixedly connected with supporting feet (15), and the number of the supporting feet (15) is four.

Images