Sensor-based stainless steel pipe airtightness detection device and method thereof

Abstract

The invention belongs to the field of stainless steel pipe air tightness detection, and particularly relates to a sensor-based stainless steel pipe air tightness detection device and a method thereof.The sensor-based stainless steel pipe air tightness detection device comprises a base, the top of the base is fixedly connected with a supporting plate, the inner wall of the supporting plate is rotatably connected with a first air inlet pipeline, and one end of the first air inlet pipeline is rotatably connected with a second air inlet pipeline; a hydraulic cylinder is fixedly connected to the side, away from the supporting plate, of the top of the base, a sliding plate is fixedly connected to the output end of the hydraulic cylinder and slidably connected with the base, and a pressure sensor is rotationally connected to the outer wall of the sliding plate. According to the sensor-based stainless steel pipe airtightness detection device and method, the arc-shaped surface of the bottom of the sponge wiper is controlled to be attached to the outer wall of the stainless steel pipe through the electric telescopic rod, soapy water sprayed out of the second spray head permeates into the sponge wiper, the soapy water is smeared through the sponge wiper, a large amount of the soapy water can be prevented from dripping, and the airtightness of the stainless steel pipe is detected. And soapy water can be conveniently and uniformly smeared.

Description

Technical Field

[0001] The present invention belongs to the field of airtightness detection of stainless steel pipes, and specifically relates to an airtightness detection device and method for stainless steel pipes based on sensors. Background Art

[0002] Stainless steel pipes are hollow long cylindrical steel materials, which are suitable for use as pipes for transporting fluids. They are mainly widely used in industrial pipelines such as petroleum, chemical industry, medical treatment, food, light industry, and mechanical instruments, as well as mechanical structure components, etc. Stainless steel pipes are made of steel billets with acid-resistant and heat-resistant grades. They are formed through heating, piercing, sizing, hot rolling, and cutting. The classification of stainless steel pipes: basically two major categories, seamless stainless steel pipes and welded stainless steel pipes (seamed pipes). According to the outer diameter shape of the pipes, they can be divided into round pipes and special-shaped pipes. The widely used ones are round pipes.

[0003] In the application of stainless steel pipes, it is often necessary to splice multiple sections of stainless steel pipes to transmit fluids. To ensure that the fluids do not leak during transmission in multiple sections of stainless steel pipes, after splicing, it is necessary to detect the airtightness of multiple sections of stainless steel pipes. In the existing technology, the airtightness of stainless steel pipes is often detected by the pressure decay method. A pressure sensor is connected to one end of the stainless steel pipe, and gas is introduced into the other end and kept under pressure for a period of time. The change in air pressure inside the stainless steel pipe is monitored by the pressure sensor to determine whether there is air leakage. However, the pressure sensor is generally connected to the stainless steel pipe through threads, and it cannot be guaranteed that there will be no gaps after connection. If there are gaps at the connection between the pressure sensor and the stainless steel pipe, the air pressure inside the stainless steel pipe will gradually decrease, affecting the result of airtightness detection. Moreover, as the air pressure inside the stainless steel pipe increases, the temperature inside the pipe will increase, which will cause the gas to expand. During the pressure-holding process of the stainless steel pipe, the stainless steel pipe itself starts to dissipate heat, resulting in a gradual recovery of temperature, and at this time the pressure starts to decrease. As a result, the value of the pressure sensor will continuously decrease during the pressure-holding process of the stainless steel pipe, affecting the judgment of the airtightness of the stainless steel pipe.

[0004] Therefore, the present invention provides an airtightness detection device and method for stainless steel pipes based on sensors. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve the problem that pressure sensors are generally connected to stainless steel pipes through threads, and it is impossible to ensure that there are no gaps after connection. If there are gaps at the connection between the pressure sensor and the stainless steel pipe, the air pressure inside the stainless steel pipe will gradually decrease, affecting the result of airtightness detection. Moreover, as the air pressure inside the stainless steel pipe increases, the temperature inside the pipe will increase, which will cause the gas to expand. During the pressure holding process of the stainless steel pipe, the stainless steel pipe itself starts to dissipate heat, resulting in a gradual recovery of the temperature. At this time, the pressure starts to decrease, which leads to a continuous decrease in the value of the pressure sensor during the pressure holding process of the stainless steel pipe, affecting the judgment of the airtightness of the stainless steel pipe. The present invention proposes an airtightness detection device and method for stainless steel pipes based on sensors.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: The airtightness detection device for stainless steel pipes based on sensors of the present invention includes a base, a support plate is fixedly connected to the top of the base, a first intake pipe is rotatably connected to the inner wall of the support plate, one end of the first intake pipe is rotatably connected to a second intake pipe, an air pump is arranged at one end of the second intake pipe, a hydraulic cylinder is fixedly connected to the top of the base and away from the support plate, the output end of the hydraulic cylinder is fixedly connected to a slide plate, the slide plate is slidably connected to the base, and a pressure sensor is rotatably connected to the outer wall of the slide plate. It also includes: A support component for supporting the stainless steel pipe to be pre-detected; A spraying component for detecting the airtightness at the connection between the pressure sensor and the stainless steel pipe; A rotating component for controlling the rotation of the stainless steel pipe on the support component; A heat dissipation component for cooling the stainless steel pipe during the airtightness detection process; A spraying component for cleaning the soapy water on the stainless steel pipe.

[0007] Preferably, the support component includes two groups of brackets, the two groups of brackets are symmetrically and fixedly installed on the top of the base, a heat conduction plate is fixedly connected between the two groups of brackets, and the top of the heat conduction plate is arc-shaped.

[0008] Preferably, the spraying component includes a top plate, the top plate is fixedly installed on the top of the support plate, a first motor is fixedly connected to one side of the top plate, the output end of the first motor extends into the interior of the top plate and is fixedly connected to a lead screw, the lead screw is rotatably connected to the top plate, the outer wall of the lead screw is connected to a slider through a lead screw nut pair, the slider is slidably connected to the top plate, a water tank is fixedly connected to the bottom of the slider, a first liquid inlet pipe is fixedly connected to the inner wall of the water tank, a second liquid inlet pipe is slidably connected to the inner wall of the first liquid inlet pipe, and a second spray head is arranged at the bottom of the second liquid inlet pipe.

[0009] Preferably, an installation plate is fixedly connected to the outer wall of the second nozzle, a sponge eraser is fixedly connected to the bottom of the installation plate, and the bottom of the sponge eraser is arc-shaped.

[0010] Preferably, the rotating assembly includes a toothed ring fixedly installed on the outer wall of the first intake pipe. One side of the support plate is fixedly connected to a second motor, and the output end of the second motor extends into the support plate and is fixedly connected to a gear, which is meshed with the toothed ring.

[0011] Preferably, the heat dissipation assembly includes a sleeve disposed below the heat conducting plate. A plurality of heat dissipation plates are fixedly connected to the inner wall of the sleeve at equal intervals, and the heat dissipation plates are fixedly connected to the heat conducting plate. One side of the sleeve is fixedly connected to an exhaust fan, and the output end of the exhaust fan is connected to an air outlet pipe, and one end of the air outlet pipe extends into the sleeve.

[0012] Preferably, a plurality of groups of flow guiding plates are fixedly connected to the outer wall of the heat dissipation plate at equal intervals. The flow guiding plates are obliquely installed, and the inclination directions of adjacent two groups of flow guiding plates are opposite.

[0013] Preferably, the spraying assembly includes a water storage cavity opened in the base. Two liquid inlets are symmetrically opened on the outer wall of the base, and both of the two liquid inlets communicate with the water storage cavity. A fixing frame is fixedly connected to the outer wall of the second nozzle and above the installation plate. The fixing frame is arc-shaped. Two first nozzles are symmetrically and fixedly connected to the inner wall of the fixing frame. Both of the two first nozzles are obliquely installed. Two water pumps are symmetrically and fixedly connected to the bottom of the fixing frame. The output end of the water pump is connected to a telescopic pipe. One end of the telescopic pipe is connected to the first nozzle, and the other end of the telescopic pipe penetrates through the liquid inlet and extends into the water storage cavity. An electric telescopic rod is fixedly connected to the bottom of the water tank, and the output end of the electric telescopic rod is fixedly connected to the fixing frame. Two blanking ports are symmetrically opened on the top of the base, and a filter screen is fixedly connected to the inner wall of the blanking port.

[0014] Preferably, two current collecting plates are symmetrically and fixedly connected to the top of the heat conducting plate, and both of the two current collecting plates are arc-shaped.

[0015] A method for detecting the air tightness of a stainless steel pipe based on a sensor. This detection method is applicable to the above-mentioned air tightness detection device for a stainless steel pipe based on a sensor. The steps of this detection method are as follows: S1: Insert the first intake pipe into one end of the stainless steel pipe and thread it with the stainless steel pipe. Insert the pressure sensor into the other end of the stainless steel pipe and also thread it with the stainless steel pipe. S2: Use the second nozzle to spray soapy water at the connection between the pressure sensor and the stainless steel pipe, and judge whether there is air leakage at the connection between the pressure sensor and the stainless steel pipe during pre-detection. S3: Spray normal temperature water with the first nozzle to clean the soapy water at the connection between the pressure sensor and the stainless steel pipe, and spray and cool the stainless steel pipe when inflating the stainless steel pipe.

[0016] The beneficial effects of the present invention are as follows: 1. For the airtightness detection device and method of the stainless steel pipe based on the sensor of the present invention, the arc surface at the bottom of the sponge wipe is controlled by the electric telescopic rod to fit the outer wall of the stainless steel pipe. The soapy water sprayed from the second nozzle penetrates into the sponge wipe, and the soapy water is smeared by the sponge wipe, which can prevent a large amount of soapy water from dripping and facilitate the more uniform smearing of the soapy water.

[0017] 2. For the airtightness detection device and method of the stainless steel pipe based on the sensor of the present invention, spray a small amount of normal temperature water on the heat conduction plate with the first nozzle, which is convenient for lubricating the joint between the heat conduction plate and the stainless steel pipe, preventing damage to the outer wall of the stainless steel pipe due to friction when rotating the heat conduction plate, and avoiding the temperature rise of the stainless steel pipe caused by friction, thereby ensuring the accuracy of the airtightness detection.

[0018] 3. For the airtightness detection device and method of the stainless steel pipe based on the sensor of the present invention, spray normal temperature water with the first nozzle. Since the first nozzle is installed obliquely, the sprayed water flow is inclined downward, which is convenient for sliding down along the outer wall of the stainless steel pipe, thereby facilitating the cleaning of the soapy water at the connection between the pressure sensor and the stainless steel pipe.

[0019] 4. For the airtightness detection device and method of the stainless steel pipe based on the sensor of the present invention, the arc at the top of the heat conduction plate fits the outer wall of the stainless steel pipe. The heat inside the stainless steel pipe can be transferred through the fit of the heat conduction plate. By setting a plurality of heat dissipation plates and a plurality of flow guiding plates, the heat dissipation area of the heat conduction plate can be increased, thereby improving the heat dissipation effect on the stainless steel pipe, enabling the stainless steel pipe to quickly cool down to the normal temperature state, facilitating the maintenance of the stability of the pressure sensor value. Through the suction of the exhaust fan, the outside air enters the sleeve and circulates. After the outside air enters the sleeve, it circulates along the outer wall of a plurality of heat dissipation plates. When passing through the flow guiding plates, it can flow along the inclined surface of the flow guiding plates, thereby being able to take away the heat of the stainless steel pipe faster.

[0020] 5. For the airtightness detection device and method of the stainless steel pipe based on the sensor of the present invention, spray normal temperature water on the inflating stainless steel pipe with the first nozzle to further accelerate the cooling of the stainless steel pipe. And under the wrapping of the two current collecting plates, part of the normal temperature water can be left on the heat conduction plate to continuously soak the stainless steel pipe. The soaking environment can greatly improve the heat dissipation efficiency of the stainless steel pipe, make the inflation process closer to isothermal compression, and thus inhibit the temperature rise. Description of the Drawings

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 is the perspective view of the base and the top plate of the present invention used in combination; Figure 2 is the perspective view of the water tank and the telescopic pipe of the present invention used in combination; Figure 3 is the exploded view of the heat conducting plate and the telescopic pipe of the present invention used in combination; Figure 4 is the sectional view of the base and the top plate of the present invention used in combination; Figure 5 is the exploded view of the heat conducting plate and the heat dissipating plate of the present invention used in combination; Figure 6 is the perspective view of the mounting plate and the sponge cleaner of the present invention used in combination; Figure 7 is the perspective view of the first nozzle and the manifold of the present invention used in combination; Figure 8 is the present invention Figure 4 the enlarged view of part A in; Figure 9 is the present invention Figure 5 the enlarged view of part B in.

[0023] In the figure: 1. Base; 2. Bracket; 3. Heat conducting plate; 4. First intake pipe; 5. Second intake pipe; 6. Air pump; 7. Pressure sensor; 8. Support plate; 9. Top plate; 10. First motor; 11. Lead screw; 12. Slide block; 13. Water tank; 14. First liquid inlet pipe; 15. Second liquid inlet pipe; 16. Mounting plate; 17. Sponge cleaner; 18. Second motor; 19. Gear; 20. Tooth ring; 21. Electric telescopic rod; 22. Fixed frame; 23. First nozzle; 24. Water pump; 25. Telescopic pipe; 26. Water storage cavity; 27. Liquid inlet; 28. Discharge opening; 29. Filter screen; 30. Hydraulic cylinder; 31. Slide plate; 32. Manifold; 33. Heat dissipating plate; 34. Sleeve; 35. Deflector; 36. Exhaust fan; 37. Exhaust pipe; 38. Second nozzle. Detailed implementation manners

[0024] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0025] Such as Figures 1 to 9As shown in the figure, the present invention provides a technical solution for an airtightness detection device of a stainless steel pipe based on sensors, including a base 1. A support plate 8 is fixedly connected to the top of the base 1. A first intake pipe 4 is rotatably connected to the inner wall of the support plate 8. One end of the first intake pipe 4 is rotatably connected to a second intake pipe 5. An air pump 6 is provided at one end of the second intake pipe 5. A hydraulic cylinder 30 is fixedly connected to the top of the base 1 and on the side away from the support plate 8. The output end of the hydraulic cylinder 30 is fixedly connected to a slide plate 31. The slide plate 31 is slidably connected to the base 1. A pressure sensor 7 is rotatably connected to the outer wall of the slide plate 31. It also includes: a support assembly for supporting the stainless steel pipe to be pre-detected; a spraying assembly for detecting the airtightness at the connection between the pressure sensor 7 and the stainless steel pipe; a rotating assembly for controlling the rotation of the stainless steel pipe on the support assembly; a heat dissipation assembly for cooling the stainless steel pipe during the airtightness detection process; a spraying assembly for cleaning the soapy water on the stainless steel pipe. The spraying assembly includes a top plate 9. The top plate 9 is fixedly installed on the top of the support plate 8. A first motor 10 is fixedly connected to one side of the top plate 9. The output end of the first motor 10 extends into the interior of the top plate 9 and is fixedly connected to a lead screw 11. The lead screw 11 is rotatably connected to the top plate 9. A slider 12 is connected to the outer wall of the lead screw 11 through a lead screw nut pair. The slider 12 is slidably connected to the top plate 9. A water tank 13 is fixedly connected to the bottom of the slider 12. A first liquid inlet pipe 14 is fixedly connected to the inner wall of the water tank 13. A second liquid inlet pipe 15 is slidably connected to the inner wall of the first liquid inlet pipe 14. A second spray head 38 is provided at the bottom of the second liquid inlet pipe 15. An installation plate 16 is fixedly connected to the outer wall of the second spray head 38. A sponge wipe 17 is fixedly connected to the bottom of the installation plate 16. The bottom of the sponge wipe 17 is arc-shaped. The rotating assembly includes a toothed ring 20. The toothed ring 20 is fixedly installed on the outer wall of the first intake pipe 4. A second motor 18 is fixedly connected to one side of the support plate 8. The output end of the second motor 18 extends into the interior of the support plate 8 and is fixedly connected to a gear 19. The gear 19 is meshed with the toothed ring 20.

[0026] Through the above technical solution, the first intake pipe 4 is inserted into one end of the stainless steel pipe and is threadedly connected to the stainless steel pipe. The pressure sensor 7 is inserted into the other end of the stainless steel pipe and is also threadedly connected to the stainless steel pipe. Soapy water is filled in the water tank 13. The first motor 10 is started to drive the lead screw 11 to rotate, causing the slider 12 to move horizontally, driving the water tank 13 to move horizontally, and causing the second spray head 38 to move horizontally. Thus, the second spray head 38 is controlled to move to the connection between the pressure sensor 7 and the stainless steel pipe. The soapy water in the water tank 13 flows to the second spray head 38 along the first liquid inlet pipe 14 and the second liquid inlet pipe 15 and is sprayed out through the second spray head 38, facilitating the spraying of soapy water on the connection between the pressure sensor 7 and the stainless steel pipe. While spraying, the second motor 18 is started to drive the gear 19 to rotate, causing the toothed ring 20 to rotate, driving the first intake pipe 4 to rotate, and then driving the stainless steel pipe and the pressure sensor 7 to rotate. Thus, soapy water can be sprayed on different positions of the connection between the pressure sensor 7 and the stainless steel pipe. Subsequently, the second spray head 38 is controlled to move horizontally by the first motor 10, causing the second spray head 38 to move to the connection between the first intake pipe 4 and the stainless steel pipe, and spraying soapy water in the same way. After the soapy water spraying is completed, the air pump 6 is started to pump the external gas along the second intake pipe 5 and the first intake pipe 4 into the stainless steel pipe to pre-detect the connection between the stainless steel pipe and the pressure sensor 7. The inspector can judge whether the pressure sensor 7 and the stainless steel pipe are tightly connected by observing the change of the soapy water, facilitating the timely adjustment of the connection between the pressure sensor 7 and the stainless steel pipe. The detection of the connection between the first intake pipe 4 and the stainless steel pipe is the same. After it is detected that the pressure sensor 7 and the stainless steel pipe are tightly connected, gas is introduced into the stainless steel pipe by the air pump 6 and kept pressurized for a period of time, and the airtightness of the stainless steel pipe is judged by checking the numerical change of the pressure sensor 7.

[0027] Specifically, the support assembly includes two groups of brackets 2. The two groups of brackets 2 are symmetrically and fixedly installed on the top of the base 1. A heat conducting plate 3 is fixedly connected between the two groups of brackets 2. The top of the heat conducting plate 3 is arc-shaped; the heat dissipation assembly includes a sleeve 34. The sleeve 34 is arranged below the heat conducting plate 3. A plurality of heat dissipation plates 33 are equidistantly and fixedly connected to the inner wall of the sleeve 34. The heat dissipation plates 33 are fixedly connected to the heat conducting plate 3. One side of the sleeve 34 is fixedly connected with an exhaust fan 36. The output end of the exhaust fan 36 is connected with an air outlet pipe 37. One end of the air outlet pipe 37 extends into the sleeve 34; a plurality of groups of guide plates 35 are equidistantly and fixedly connected to the outer wall of the heat dissipation plates 33. The guide plates 35 are obliquely installed, and the inclination directions of two adjacent groups of guide plates 35 are opposite.

[0028] Through the above technical solution, the stainless steel pipe to be detected is placed on the heat conducting plate 3. The heat conducting plate 3 supports the stainless steel pipe, facilitating the detection of the stainless steel pipe. The arc at the top of the heat conducting plate 3 fits the outer wall of the stainless steel pipe. Through the fitting of the heat conducting plate 3, the heat inside the stainless steel pipe can be transferred. By setting a plurality of heat dissipation plates 33 and a plurality of flow guiding plates 35, the heat dissipation area of the heat conducting plate 3 can be increased, thereby improving the heat dissipation effect on the stainless steel pipe, enabling the stainless steel pipe to quickly cool down to the normal temperature state, facilitating the maintenance of the stability of the numerical value of the pressure sensor 7. Start the exhaust fan 36 to draw air, so that the outside air enters the sleeve 34 for circulation. After the outside air enters the sleeve 34, it circulates along the outer walls of a plurality of heat dissipation plates 33. When passing through the flow guiding plate 35, it can flow along the inclined surface of the flow guiding plate 35, thereby being able to take away the heat of the stainless steel pipe faster.

[0029] Specifically, the spraying assembly includes a water storage cavity 26, which is opened inside the base 1. Two liquid inlets 27 are symmetrically opened on the outer wall of the base 1, and both of the two liquid inlets 27 communicate with the water storage cavity 26. A fixing frame 22 is fixedly connected to the outer wall of the second spray head 38 and above the mounting plate 16. The fixing frame 22 is arranged in an arc shape. Two first spray heads 23 are symmetrically and fixedly connected to the inner wall of the fixing frame 22. Both of the two first spray heads 23 are inclinedly installed. Two water pumps 24 are symmetrically and fixedly connected to the bottom of the fixing frame 22. The output end of the water pump 24 is connected with a telescopic pipeline 25. One end of the telescopic pipeline 25 is connected to the first spray head 23, and the other end of the telescopic pipeline 25 penetrates through the liquid inlet 27 and extends into the interior of the water storage cavity 26. An electric telescopic rod 21 is fixedly connected to the bottom of the water tank 13. The output end of the electric telescopic rod 21 is fixedly connected to the fixing frame 22. Two discharge ports 28 are symmetrically opened on the top of the base 1. A filter screen 29 is fixedly connected to the inner wall of the discharge port 28. Two current collecting plates 32 are symmetrically and fixedly connected to the top of the heat conducting plate 3. Both of the two current collecting plates 32 are arranged in an arc shape.

[0030] Through the above technical solution, when detecting the connection between the pressure sensor 7 and the stainless steel pipe, the electric telescopic rod 21 is started, and the fixing frame 22 is controlled to move downward, so that the second spray head 38 moves downward. The second liquid inlet pipe 15 slides in the first liquid inlet pipe 14. After the second spray head 38 moves downward, it drives the sponge brush 17 to move downward. The arc surface at the bottom of the sponge brush 17 fits against the outer wall of the stainless steel pipe. The soapy water sprayed from the second spray head 38 penetrates into the sponge brush 17, and the soapy water is smeared through the sponge brush 17, which can prevent a large amount of soapy water from dripping and facilitate the more uniform smearing of the soapy water. Subsequently, the fixing frame 22 is controlled to move upward by the electric telescopic rod 21, so that the sponge brush 17 is separated from the stainless steel pipe. Normal temperature water is filled into the water storage cavity 26. After detecting that the connection between the pressure sensor 7 and the stainless steel pipe is tight, the water pump 24 is started, and the normal temperature water in the water storage cavity 26 is pumped along the telescopic pipe 25 to the first spray head 23 and sprayed out through the first spray head 23. Since the first spray head 23 is installed obliquely, the sprayed water flow is inclined downward, which is convenient for sliding down along the outer wall of the stainless steel pipe. Thus, it is convenient to clean the soapy water at the connection between the pressure sensor 7 and the stainless steel pipe. The sprayed normal temperature water re-enters the water storage cavity 26 along the material outlet 28, so that the normal temperature water can be recycled. When starting the airtightness detection of the stainless steel pipe, normal temperature water is continuously sprayed through the first spray head 23, and at the same time, the first spray head 23 is controlled to move horizontally by the first motor 10, so that the first spray head 23 sprays different positions of the stainless steel pipe. Through the spraying of normal temperature water, the cooling of the stainless steel pipe is further accelerated, and under the wrapping of the two current collecting plates 32, part of the normal temperature water can stay on the heat conducting plate 3 to continuously soak the stainless steel pipe. The soaking environment can greatly improve the heat dissipation efficiency of the stainless steel pipe, make the inflation process closer to isothermal compression, and thus suppress the temperature rise.

[0031] An airtightness detection method for a stainless steel pipe based on a sensor. This detection method is applicable to the above-mentioned airtightness detection device for a stainless steel pipe based on a sensor. The steps of this detection method are as follows: S1: Insert the first air inlet pipe 4 into one end of the stainless steel pipe and thread it with the stainless steel pipe. Insert the pressure sensor 7 into the other end of the stainless steel pipe and also thread it with the stainless steel pipe. S2: Use the second spray head 38 to spray soapy water at the connection between the pressure sensor 7 and the stainless steel pipe, and judge whether there is air leakage at the connection between the pressure sensor 7 and the stainless steel pipe during pre-detection. S3: Use the first spray head 23 to spray normal temperature water to clean the soapy water at the connection between the pressure sensor 7 and the stainless steel pipe, and spray and cool the stainless steel pipe when inflating the stainless steel pipe.

[0032] During use, normal temperature water is filled into the water storage cavity 26. A small amount of normal temperature water is sprayed on the heat conduction plate 3 through the first spray head 23 to facilitate lubricating the joint between the heat conduction plate 3 and the stainless steel pipe, prevent damage to the outer wall of the stainless steel pipe due to friction when rotating the heat conduction plate 3, and avoid the stainless steel pipe from heating up due to friction, thereby ensuring the accuracy of airtightness detection. Place the stainless steel pipe to be detected on the heat conduction plate 3, and support the stainless steel pipe through the heat conduction plate 3 to facilitate the detection of the stainless steel pipe. Insert the first air inlet pipe 4 into one end of the stainless steel pipe and thread it with the stainless steel pipe. Insert the pressure sensor 7 into the other end of the stainless steel pipe and also thread it with the stainless steel pipe. Fill the water tank 13 with soapy water, start the first motor 10 to drive the lead screw 11 to rotate, make the slider 12 move horizontally, drive the water tank 13 to move horizontally, and make the second spray head 38 move horizontally, thereby controlling the second spray head 38 to move to the joint between the pressure sensor 7 and the stainless steel pipe. Start the electric telescopic rod 21 to control the fixing frame 22 to move downward, make the second spray head 38 move downward, and the second liquid inlet pipe 15 slides in the first liquid inlet pipe 14. After the second spray head 38 moves downward, drive the sponge brush 17 to move downward, and the arc surface at the bottom of the sponge brush 17 fits with the outer wall of the stainless steel pipe. The soapy water in the water tank 13 flows along the first liquid inlet pipe 14 and the second liquid inlet pipe 15 to the second spray head 38 and is sprayed out through the second spray head 38. The soapy water sprayed out from the second spray head 38 penetrates into the sponge brush 17, and the soapy water is smeared through the sponge brush 17, which can prevent a large amount of soapy water from dripping and facilitate the more uniform smearing of the soapy water. Start the second motor 18 during spraying to drive the gear 19 to rotate, make the toothed ring 20 rotate, drive the first air inlet pipe 4 to rotate, and then drive the stainless steel pipe and the pressure sensor 7 to rotate, thereby being able to spray soapy water on different positions at the joint between the pressure sensor 7 and the stainless steel pipe. After spraying is completed, control the fixing frame 22 to move upward through the electric telescopic rod 21 to separate the sponge brush 17 from the stainless steel pipe. Then control the second spray head 38 to move horizontally through the first motor 10 to make the second spray head 38 move to the joint between the first air inlet pipe 4 and the stainless steel pipe, and spray soapy water in the same way. After the soapy water is sprayed, start the air pump 6 to pump the external gas along the second air inlet pipe 5 and the first air inlet pipe 4 into the stainless steel pipe to pre-detect the joint between the stainless steel pipe and the pressure sensor 7. The inspector can judge whether the connection between the pressure sensor 7 and the stainless steel pipe is tight by observing the change of the soapy water, which is convenient for timely adjusting the connection between the pressure sensor 7 and the stainless steel pipe. The detection of the joint between the first air inlet pipe 4 and the stainless steel pipe is the same. After detecting that the connection between the pressure sensor 7 and the stainless steel pipe is tight, start the water pump 24 to pump the normal temperature water in the water storage cavity 26 along the telescopic pipe 25 to the first spray head 23 and spray it out through the first spray head 23. Since the first spray head 23 is installed obliquely, the sprayed water flow is inclined downward, which is convenient for sliding down along the outer wall of the stainless steel pipe, thereby facilitating the cleaning of the soapy water at the joint between the pressure sensor 7 and the stainless steel pipe.Gas is introduced into the stainless steel pipe through the air pump 6 and maintained at a constant pressure for a period of time. The airtightness of the stainless steel pipe is judged by checking the numerical change of the pressure sensor 7. The arc on the top of the heat conducting plate 3 fits the outer wall of the stainless steel pipe. Through the fitting of the heat conducting plate 3, the heat inside the stainless steel pipe can be transferred. By setting a number of heat dissipation plates 33 and a number of flow guiding plates 35, the heat dissipation area of the heat conducting plate 3 can be increased, thereby improving the heat dissipation effect on the stainless steel pipe, enabling the stainless steel pipe to quickly cool down to the normal temperature state, facilitating the maintenance of the stability of the numerical value of the pressure sensor 7. Start the exhaust fan 36 to exhaust air, so that the outside air enters the sleeve 34 for circulation. After the outside air enters the sleeve 34, it flows along the outer walls of a number of heat dissipation plates 33. When passing through the flow guiding plate 35, it can flow along the inclined surface of the flow guiding plate 35, thereby being able to take away the heat of the stainless steel pipe faster. While starting the airtightness detection of the stainless steel pipe, continue to spray normal temperature water through the first spray head 23, and at the same time control the first spray head 23 to move horizontally through the first motor 10, so that the first spray head 23 sprays different positions of the stainless steel pipe. Through the spraying of normal temperature water, the cooling of the stainless steel pipe is further accelerated. And under the wrapping of the two current collecting plates 32, part of the normal temperature water can be left on the heat conducting plate 3 to continuously soak the stainless steel pipe. The soaking environment can greatly improve the heat dissipation efficiency of the stainless steel pipe, making the inflation process closer to isothermal compression, thereby suppressing the temperature rise.

[0033] The above front, back, left, right, up, and down are all based on the Figure 1 description in the attached drawings of the specification. Taking the perspective of the observer as the standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, and so on.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Sensor-based airtightness detection device for stainless steel pipes, including a base (1). A support plate (8) is fixedly connected to the top of the base (1). The inner wall of the support plate (8) is rotatably connected to a first intake pipe (4). One end of the first intake pipe (4) is rotatably connected to a second intake pipe (5). An air pump (6) is provided at one end of the second intake pipe (5). A hydraulic cylinder (30) is fixedly connected to the top of the base (1) and on the side away from the support plate (8). The output end of the hydraulic cylinder (30) is fixedly connected to a slide plate (31). The slide plate (31) is slidably connected to the base (1). A pressure sensor (7) is rotatably connected to the outer wall of the slide plate (31), characterized in that, Also includes: A support component for supporting the stainless steel pipe to be pre-detected; A spraying component for detecting the sealing performance at the connection between the pressure sensor (7) and the stainless steel pipe; A rotating component for controlling the rotation of the stainless steel pipe on the support component; A heat dissipation component for cooling the stainless steel pipe during the airtightness detection process; A spraying component for cleaning the soapy water on the stainless steel pipe.

2. The airtightness detection device for stainless steel pipes based on sensors according to claim 1, characterized in that, The support component includes two groups of brackets (2), the two groups of brackets (2) are symmetrically and fixedly installed on the top of the base (1), a heat conduction plate (3) is fixedly connected between the two groups of brackets (2), and the top of the heat conduction plate (3) is arc-shaped.

3. The airtightness detection device for stainless steel pipes based on sensors according to claim 2, characterized in that, The spraying component includes a top plate (9), the top plate (9) is fixedly installed on the top of the support plate (8), a first motor (10) is fixedly connected to one side of the top plate (9), the output end of the first motor (10) extends into the interior of the top plate (9) and is fixedly connected to a lead screw (11), the lead screw (11) is rotatably connected to the top plate (9), the outer wall of the lead screw (11) is connected to a slider (12) through a lead screw nut pair, the slider (12) is slidably connected to the top plate (9), the bottom of the slider (12) is fixedly connected to a water tank (13), a first liquid inlet pipe (14) is fixedly connected to the inner wall of the water tank (13), a second liquid inlet pipe (15) is slidably connected to the inner wall of the first liquid inlet pipe (14), and a second spray head (38) is arranged at the bottom of the second liquid inlet pipe (15).

4. The airtightness detection device for stainless steel pipes based on sensors according to claim 3, characterized in that, The outer wall of the second spray head (38) is fixedly connected to a mounting plate (16), the bottom of the mounting plate (16) is fixedly connected to a sponge wipe (17), and the bottom of the sponge wipe (17) is arc-shaped.

5. The airtightness detection device for stainless steel pipes based on sensors according to claim 4, characterized in that, The rotating component includes a toothed ring (20), the toothed ring (20) is fixedly installed on the outer wall of the first air inlet pipe (4), a second motor (18) is fixedly connected to one side of the support plate (8), the output end of the second motor (18) extends into the interior of the support plate (8) and is fixedly connected to a gear (19), and the gear (19) is meshed with the toothed ring (20).

6. The airtightness detection device for stainless steel pipes based on sensors according to claim 5, characterized in that, The heat dissipation component includes a sleeve (34), the sleeve (34) is arranged below the heat conduction plate (3), a plurality of heat dissipation plates (33) are fixedly connected to the inner wall of the sleeve (34) at equal intervals, the heat dissipation plates (33) are fixedly connected to the heat conduction plate (3), a suction fan (36) is fixedly connected to one side of the sleeve (34), the output end of the suction fan (36) is connected to an air outlet pipe (37), and one end of the air outlet pipe (37) extends into the interior of the sleeve (34).

7. The airtightness detection device for stainless steel pipes based on sensors according to claim 6, characterized in that, A plurality of groups of flow guiding plates (35) are fixedly connected to the outer wall of the heat dissipation plate (3) at equal intervals, the flow guiding plates (35) are inclinedly installed, and the inclination directions of adjacent two groups of flow guiding plates (35) are opposite.

8. The airtightness detection device for stainless steel pipes based on sensors according to claim 7, characterized in that, The spray assembly includes a water storage chamber (26) which is provided inside the base (1). Two liquid inlets (27) are symmetrically formed on the outer wall of the base (1), and both of the two liquid inlets (27) communicate with the water storage chamber (26). A fixing frame (22) is fixedly connected to the outer wall of the second spray head (38) and above the mounting plate (16). The fixing frame (22) is arc-shaped. Two first spray heads (23) are symmetrically and fixedly connected to the inner wall of the fixing frame (22). Both of the two first spray heads (23) are obliquely installed. Two water pumps (24) are symmetrically and fixedly connected to the bottom of the fixing frame (22). The output end of the water pump (24) is connected with a telescopic pipeline (25). One end of the telescopic pipeline (25) is connected with the first spray head (23), and the other end of the telescopic pipeline (25) penetrates through the liquid inlet (27) and extends into the interior of the water storage chamber (26). An electric telescopic rod (21) is fixedly connected to the bottom of the water tank (13). The output end of the electric telescopic rod (21) is fixedly connected with the fixing frame (22). Two material discharge ports (28) are symmetrically formed on the top of the base (1). A filter screen (29) is fixedly connected to the inner wall of the material discharge port (28).

9. The airtightness detection device for stainless steel pipes based on sensors according to claim 8, characterized in that, Two current collecting plates (32) are symmetrically and fixedly connected to the top of the heat conducting plate (3). Both of the two current collecting plates (32) are arc-shaped.

10. A method for detecting the airtightness of a stainless steel pipe based on sensors, which is applicable to the airtightness detection device for a stainless steel pipe based on sensors described in claim 9 above, characterized in that: The steps of the detection method are as follows: S1: Insert the first air inlet pipe (4) into one end of the stainless steel pipe and thread it with the stainless steel pipe. Insert the pressure sensor (7) into the other end of the stainless steel pipe and also thread it with the stainless steel pipe. S2: Use the second spray head (38) to spray soapy water at the connection between the pressure sensor (7) and the stainless steel pipe, and judge whether the connection between the pressure sensor (7) and the stainless steel pipe leaks during pre-detection. S3: Use the first spray head (23) to spray normal temperature water to clean the soapy water at the connection between the pressure sensor (7) and the stainless steel pipe, and spray and cool the stainless steel pipe when inflating the stainless steel pipe.

Images