Device for detecting pressure at welding position of copper pipe of air conditioner

Abstract

The invention relates to the technical field of copper pipe detection, in particular to an air conditioner copper pipe welding position pressure detection device which comprises a detection box with an opening in the top, detection liquid is arranged in the detection box, a supporting device is arranged on the upper portion of the detection box, a conveying device is arranged on the supporting device, and the upper portion of the conveying device is higher than the detection box. The lower portion of the conveying device is immersed in detection liquid of the detection box, the conveying device comprises a connecting rod, a ventilation device used for communicating the two ends of the copper pipe body is slidably arranged on the connecting rod, and the ventilation device communicates with an air supply device, so that the efficiency and accuracy of welding seam detection of the copper pipe welding part are greatly improved; the labor cost and the false detection rate are reduced, and a powerful guarantee is provided for quality control in the air conditioner production process.

Description

Technical Field

[0001] The invention relates to the technical field of copper tube detection, and in particular to a pressure detection device for welding points of copper tubes of air conditioners. Background Art

[0002] Copper tubes are one of the parts used in large quantities in air-conditioning production. They are mainly used to connect pipes in air-conditioning. Refrigerant flows through the pipes. The sealing index is the most important quality index of copper tube welded parts. In the entire air-conditioning production, a variety of copper tubes of different specifications are needed, and a variety of copper tubes of different specifications are needed to be used together. Therefore, it is necessary to cut and weld the copper tubes so that copper tubes of different specifications can be suitable for the installation of air conditioners.

[0003] Since the structure of copper tube welded parts is relatively complex, a copper tube welded part usually requires multiple parts to be welded together. Copper tube welded parts are made by welding red copper tubes and stainless steel rings together. The quality of the weld directly determines the sealing quality of the copper tube welded parts. In order to improve the production quality of copper tube welded parts, it is necessary to detect the welds of the welded copper tube welded parts in the production process of copper tube welded parts. The manifestations of weld defects include weld band breakage and weld band notch. Since the specifications of copper tube welded parts in different usage scenarios are different, copper tube welded parts have different bending degrees and lengths. The existing pressure detection device cannot detect copper tubes of different specifications, and mainly relies on manual judgment of leakage through pressure changes. However, it requires a long time of pressure maintenance test, the operation steps are cumbersome, and it takes a lot of manpower. The detection process is not standardized, and it is easy to have false detection. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art in that the steps for pressure detection at the welding point of a copper tube are complicated and there is a possibility of false detection, and to provide a pressure detection device for the welding point of a copper tube of an air conditioner.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a pressure detection device for the welding point of an air-conditioning copper tube, comprising a detection box with an opening at the top, a detection liquid is arranged inside the detection box, a supporting device is arranged at the upper part of the detection box, a conveying device is arranged on the supporting device, the upper part of the conveying device is higher than the detection box, and the lower part of the conveying device is immersed in the detection liquid in the detection box, the conveying device comprises a connecting rod, a ventilation device for connecting the two ends of the copper tube body is slidably arranged on the connecting rod, and the ventilation device is connected to an air supply device.

[0006] Furthermore, the detection box is a transparent box, and the detection liquid is water or soapy water.

[0007] Furthermore, the supporting device includes a supporting frame arranged on the upper part of the detection box, the conveying device includes a rotating shaft arranged on the supporting frame, the rotating shaft is connected to a driving device, a ratchet is arranged at the end of the rotating shaft, a chain is arranged on the ratchet, two chains are arranged, and both ends of the connecting rod are connected to the chain through a connecting plate.

[0008] Furthermore, the ventilation device comprises two sleeves sleeved on the connecting rods, and locking rings for positioning the sleeves are arranged on the sides of the sleeves.

[0009] Furthermore, a support plate is provided on the side of the sleeve, and a clamping seat is provided on the opposite surfaces of the two support plates. A clamping joint is provided in the middle position of the clamping seat, and an air outlet column is provided in the middle of the clamping joint. A rubber plug for inserting into the copper tube is provided at the bottom of the air outlet column, and the tail of the air outlet column is connected to the air supply device.

[0010] Furthermore, a sealing ring is arranged on the side of the rubber stopper, and a plurality of the rubber stoppers are coaxially arranged and have a diameter the same as the inner diameter of the copper tube.

[0011] Furthermore, a telescopic device is hingedly provided on the upper part of the support plate, an operating box is provided at the output end of the telescopic device, the bottom of the operating box is hinged to an auxiliary plate arranged on the support plate, and claws for clamping the copper tube are hingedly provided on both sides of the operating box, and the top of the claw is connected to the output end of the telescopic device.

[0012] Furthermore, the telescopic device is an aluminum cylinder, a sealing cover is provided on the outside of the cylinder, a push block is provided at the output end of the cylinder, the cross-section of the push block is triangular, slide grooves are provided on both sides of the push block, and a spherical head is provided on the top of the clamp, and the spherical head is slidably arranged inside the slide groove.

[0013] Furthermore, the gas supply device includes an air distribution plate arranged on the side of the detection box, an air inlet is arranged in the middle position of the air distribution plate, a plurality of air outlets are arranged on the side of the air distribution plate and are connected to the air outlet column through a high-pressure hose, and a plurality of solenoid valves are arranged inside the air distribution plate and are connected to the air outlets respectively.

[0014] The beneficial effects of the embodiments of the present invention are as follows: by adjusting the position of the locking ring to ensure the accuracy of the spacing and angle, when the push block is extended forward, the arc-shaped surface on the top abuts against the inner wall of the operating box, pushing the operating box to deflect, driving the clamping claws on both sides to approach the air outlet column, and the lower part of the clamping claws will be clamped to the two sides of the copper tube. When the cylinder continues to extend, it will clamp the copper tube to increase the force in the direction of the support seat, thereby ensuring the clamping effect of the clamping claws and improving the tightness of the fit between the two ends of the copper tube and the rubber plug, so that the gas pressure inside the copper tube is guaranteed during the detection process, and the accuracy of the detection is improved, which greatly improves the efficiency and accuracy of the weld detection of the copper tube welded parts, reduces the labor cost and the false detection rate, and provides a strong guarantee for the quality control in the air-conditioning production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the position structure of the connecting rod and the supporting plate of the present invention;

[0017] Figure 3 It is a schematic diagram of the internal structure of the casing of the present invention;

[0018] Figure 4 It is a schematic diagram of the enlarged structure of point A of the present invention;

[0019] Figure 5 It is a schematic diagram of the push block structure of the present invention;

[0020] Figure 6 It is a schematic diagram of the internal structure of the gas distribution plate of the present invention;

[0021] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0022] In the figure: 1. detection box; 101. support frame; 102. rotating shaft; 2. gas distribution plate; 201. solenoid valve; 202. high-pressure hose; 3. connecting rod; 301. sleeve; 302. locking ring; 3021. connecting tooth; 303. support plate; 304. cylinder; 305. operation box; 306. rubber plug; 3061. air outlet column; 307. push block; 3071. slide groove; 4. clamping claw; 5. connecting wheel. DETAILED DESCRIPTION

[0023] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0024] See also Figures 1 to 6The embodiment of the present invention discloses a pressure detection device for the welding point of an air-conditioning copper pipe, comprising a detection box 1 with an opening on the top, which is filled with a detection liquid. The detection box 1 is made of a transparent material such as tempered glass or transparent acrylic to observe the internal detection situation. The detection liquid can be water or soapy water. When there is a leak at the weld, bubbles will be generated at the leak point, which is convenient for detection personnel to identify.

[0025] A supporting device is arranged on the upper part of the detection box 1, and the supporting device includes a supporting frame 101. A conveying device is arranged on the supporting frame 101. The supporting frame 101 is firmly mounted on the upper part of the detection box 1, and the conveying device is mounted on the supporting frame 101 through a combination of a rotating shaft 102 and a chain. Two chains are arranged relatively to each other. A rotating shaft 102 for mounting a ratchet is arranged inside the detection box 1, and the chain is wound around the ratchet. The two chains are driven to rotate respectively by a motor arranged on the supporting frame 101. Both ends of the connecting rod 3 are connected to the chain through a connecting plate. When the motor is started, the connecting rod 3 will move with the chain to realize the transportation of the copper tube. Multiple groups of connecting rods 3 are arranged on the two chains. When the chain rotates, part of the connecting rod 3 will be driven to the upper part of the detection box 1, and part of the connecting rod 3 will be driven in the detection liquid, thereby driving the copper tube to be detected to be immersed in the detection liquid, thereby realizing the cycle of the detection process and improving the detection efficiency.

[0026] The ventilation device is an important part of the detection device. It is used to provide gas pressure to the inside of the copper tube to detect the sealing of the weld. The ventilation device includes two sleeves 301 sleeved on the connecting rod 3. The side of the sleeve 301 is provided with a locking ring 302 for fixing the position of the sleeve 301. During use, the two ends of copper tubes of different specifications form different angles. The sleeve 301 is sleeved on the connecting rod 3. One end of the locking ring 302 is provided with a connecting tooth 3021. The cross section of the connecting tooth 3021 is an inclined surface. The connecting tooth 3021 is provided with a connecting tooth 3021. The side of 021 is provided with a thread screwed to the inner wall of the sleeve 301. When the locking ring 302 rotates, it drives the connecting tooth 3021 to move to the left, so that the connecting tooth 3021 enters between the sleeve 301 and the connecting rod 3 to increase the resistance, so that the sleeve 301 drives the support plate 303 to maintain the required angle. Furthermore, the two relative support plates 303 can form different angles on the two vertical planes, which can be adjusted according to copper tubes of different specifications. The adjustment is simple and easy to use. It is suitable for copper tubes of different lengths and different angles and is widely applicable.

[0027] A support plate 303 is provided on the side of the sleeve 301, and a card seat is installed on the opposite surface of the support plate 303, and a card joint is provided in the middle of the card seat. An air outlet column 3061 is arranged inside the card joint, and a rubber plug 306 is arranged at the bottom of the air outlet column 3061 for tightly inserting into the copper tube to prevent gas leakage. A sealing ring is provided on the side of the rubber plug 306, and the diameter of the rubber plug 306 matches the inner diameter of the copper tube to ensure the sealing effect. The tail of the air outlet column 3061 is connected to the air supply device through the high-pressure hose 202. When in use, the distance between the two sleeves 301 is adjusted, and the two ends of the copper tube are plugged into the air outlet column 3061. Copper tubes of different diameters are sleeved on rubber plugs 306 of different diameters. The sealing ring on the side of the rubber plug 306 ensures the sealing effect of the side. Rubber plugs 306 of different diameters are suitable for a variety of copper tubes, which is convenient for testing a large number of copper tubes of the same kind. It is suitable for most air conditioners to use copper tubes for testing, and can be replaced in time after damage to ensure the testing effect.

[0028] If it only relies on the squeezing force between the two rubber stoppers 306, it is easy to be broken after high-pressure air is introduced into the inside. Therefore, a telescopic device is hinged on the upper part of the support plate 303. The telescopic device adopts an aluminum cylinder 304. A sealing cover is arranged on the outside of the cylinder 304 to reduce the risk of liquid entering the cylinder 304. A push block 307 is arranged at the output end of the cylinder 304. An operating box 305 is arranged at the output end of the telescopic device. The bottom of the operating box 305 is hinged to the auxiliary plate arranged on the support plate 303, and the auxiliary plate can rotate relative to the support plate 303. The installation angle can drive the operation box 305 and the clamping jaws 4 to rotate relative to the support plate, so that it can be used to clamp the copper tube at various angles. The push block is bolted to the output end of the cylinder, and the operation box 305 is rotated at a certain angle to improve the use effect. The two sides of the operation box 305 are hinged with clamping jaws 4 for clamping the copper tube. The top of the clamping jaws 4 is connected to the output end of the telescopic device. The clamping points of the two clamping jaws 4 coincide with the plane where the axis position of the air outlet column 3061 is located. The cross section of the push block 307 is a triangle, and the top of the push block 307 is set as an arc surface. The surface is provided with a slide groove 3071, and the top of the clamping jaw 4 is provided with a spherical head, which is slidably arranged inside the slide groove 3071. The upper part of the clamping jaw 4 is hinged with the side of the operation box 305. When in use, the cylinder 304 extends, and the spherical head on the clamping jaw 4 slides to the rear of the push block 307. The side of the operation box 305 is provided with a through hole to prevent the output end of the clamping jaw 4 and the cylinder 304 from interfering with the operation box 305, thereby ensuring the use effect. When the push block 307 extends forward, the arc surface of the top abuts against the inner wall of the operation box 305, pushing the operation box 305 to occur. Deflection drives the clamping jaws 4 on both sides to approach the air outlet column 3061. A rubber sleeve is provided at the bottom of the clamping jaws 4. The lower part of the clamping jaws 4 will clamp onto the two sides of the copper tube. When the cylinder 304 continues to extend, it will clamp the copper tube to increase the force in the direction of the support seat. An adjusting tube is provided at the connection between the push block 307 and the cylinder 304. The extension length of the cylinder 304 is adjusted according to the specifications of the copper tube to ensure the clamping effect of the clamping jaws 4 and improve the tightness of the fit between the two ends of the copper tube and the rubber plug 306. This ensures the gas pressure inside the copper tube during the detection process and improves the accuracy of the detection.

[0029] The air supply device is located on the side of the detection box 1, including an air distribution plate 2 and a high-pressure hose 202. An air inlet is provided in the middle of the air distribution plate 2, and multiple air outlets are provided on the side. Each air outlet is connected to a solenoid valve 201 and is connected to the air outlet column 3061 through the high-pressure hose 202. The air supply device is provided with two groups. The distribution plates on both sides are respectively connected to a motor to drive the air distribution plate 2 to rotate together with the chain, so that the connected high-pressure hose 202 rotates with it to ensure the use effect. The two air distribution plates 2 enable the cylinders 304 at both ends of the connecting rod 3 to supply air, and The gas distribution plates 2 on both sides are connected to the same gas tank to ensure the consistency of air pressure. By controlling the switch of the solenoid valve 201, separate air supply can be achieved for different copper tubes, so as to perform pressure detection. By controlling the switching sequence of different solenoid valves 201, the opening and closing of the clamp 4 is controlled. The copper tube to be tested is clamped and loaded on one side of the test box 1, and the material is collected on the other end. Whether there is a leak at the welding point is determined by whether bubbles are generated at the welding point of the copper tube in the test liquid, and the pressure tolerance value of the welding point is determined by the input air pressure, which makes the detection process more intuitive and more accurate.

[0030] In actual operation, first, the copper tube to be tested is placed between the two rubber stoppers 306 by moving the positions of the two support plates 303, and the angle between the support plates 303 is adjusted. The position of the locking ring 302 is adjusted to ensure the accuracy of the spacing and angle. Then, the air supply device supplies air so that the clamps 4 on both sides clamp the two ends of the copper tube. The driving device is started to send the placed copper tube into the testing liquid. The motor of the driving chain and the gas distribution plate 2 adopts a stepping motor, which is intermittently controlled to start and stop, which is convenient for loading and unloading. Gas pressure is provided to the inside of the copper tube to observe whether bubbles are generated in the testing liquid. If bubbles are present, it indicates that there is a leak at the weld. Finally, the solenoid valve 201 in the relative position is closed, and the copper tube is taken out to complete the pressure detection of the copper tube welding point, which greatly improves the efficiency and accuracy of the weld detection of the copper tube welding parts, reduces the labor cost and the false detection rate, and provides a strong guarantee for the quality control in the air-conditioning production process.

[0031] Example 2

[0032] The main difference between this embodiment and embodiment 1 is that Figure 7 As shown, no motor is arranged on the side of the rotating shaft 102, and the rotating shaft 102 is driven by the motor at the air distribution plate 2. A connecting wheel 5 is installed on the rotating shaft 102, and is connected to the motor at the air distribution plate 2 through a belt or a chain to realize synchronous rotation and ensure the use effect.

[0033] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0036] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A pressure detection device for the welding point of an air-conditioning copper tube, comprising a detection box with a top opening, characterized in that: The detection box is provided with detection liquid inside, the detection box is provided with a supporting device on the upper part, a conveying device is provided on the supporting device, the upper part of the conveying device is higher than the detection box, the lower part of the conveying device is immersed in the detection liquid in the detection box, the conveying device includes a connecting rod, a ventilation device for connecting the two ends of the copper tube body is slidably provided on the connecting rod, and the ventilation device is connected to the air supply device.

2. The pressure detection device for the welding point of the air-conditioning copper tube according to claim 1 is characterized in that: The detection box is a transparent box, and the detection liquid is water or soapy water.

3. The pressure detection device for welding joints of air conditioner copper tubes according to claim 1 is characterized in that: The supporting device includes a supporting frame arranged on the upper part of the detection box, the conveying device includes a rotating shaft arranged on the supporting frame, the rotating shaft is connected to a driving device, a ratchet is arranged at the end of the rotating shaft, a chain is arranged on the ratchet, two chains are arranged, and both ends of the connecting rod are connected to the chain through a connecting plate.

4. The pressure detection device for welding joints of air-conditioning copper tubes according to claim 1 is characterized in that: The ventilation device comprises two sleeves sleeved on the connecting rods, and the sides of the sleeves are provided with locking rings for positioning the sleeves.

5. The pressure detection device for the welding point of the air-conditioning copper tube according to claim 4 is characterized in that: A support plate is provided on the side of the sleeve, and a clamping seat is provided on the opposite surfaces of the two support plates. A clamping joint is provided in the middle position of the clamping seat, and an air outlet column is provided in the middle of the clamping joint. A rubber plug for inserting into the copper tube is provided at the bottom of the air outlet column, and the tail of the air outlet column is connected to the air supply device.

6. The pressure detection device for the welding point of the air conditioner copper tube according to claim 5 is characterized in that: A sealing ring is arranged on the side of the rubber plug, and a plurality of the rubber plugs are arranged coaxially and have the same diameter as the inner diameter of the copper tube.

7. The pressure detection device for welding joints of air-conditioning copper tubes according to claim 5 is characterized in that: A telescopic device is hingedly provided on the upper part of the support plate, an operating box is provided at the output end of the telescopic device, the bottom of the operating box is hinged to an auxiliary plate arranged on the support plate, and claws for clamping the copper tube are hingedly provided on both sides of the operating box, and the top of the claw is connected to the output end of the telescopic device.

8. The pressure detection device for the welding point of the air-conditioning copper tube according to claim 7 is characterized in that: The telescopic device is an aluminum cylinder, a sealing cover is provided on the outside of the cylinder, a push block is provided on the output end of the cylinder, the cross section of the push block is triangular, slide grooves are provided on both sides of the push block, a spherical head is provided on the top of the clamp, and the spherical head is slidably arranged inside the slide groove.

9. The pressure detection device for welding joints of air conditioner copper tubes according to claim 5, characterized in that: The gas supply device includes an air distribution plate arranged on the side of the detection box, an air inlet is arranged in the middle position of the air distribution plate, a plurality of air outlets are arranged on the side of the air distribution plate and are connected to the air outlet column through a high-pressure hose, and a plurality of solenoid valves are arranged inside the air distribution plate and are connected to the air outlets respectively.

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