Double-end elbow pipe sealing performance batch detection device

Abstract

The invention relates to the technical field of sealing performance detection, and particularly discloses a double-end bent pipe fitting sealing performance batch detection device which comprises a detection water tank and a display control cabinet, a lifting plate is arranged at an opening in the upper end of the detection water tank, and a row of rubber sealing heads arranged in pairs are arranged on the lifting plate; the lower end of each rubber sealing head communicates with a corrugated telescopic pipe, the lower end of each corrugated telescopic pipe is fixedly connected with the bottom wall of the detection water tank in a sealed mode, a pipe clamping and pressing sealing mechanism is arranged above the lifting plate, and a transparent observation part is arranged at the lower end of the rear side face of the detection water tank. An industrial camera which horizontally moves along the length direction of the transparent observation part is arranged on the rear side of the detection water tank; the industrial camera is electrically connected with the display control cabinet; according to the double-end bent pipe fitting sealing performance batch detection device, automatic detection of batch pipe fittings is achieved, the detection efficiency is greatly improved, no equipment needs to be additionally arranged for filling compressed gas into the pipe fittings, and the manufacturing and operation cost of the whole detection device is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sealing detection, and in particular discloses a batch detection device for sealing of double-end bent pipe fittings. Background Art

[0002] As a component for conveying gas and fluid media, the air tightness of pipe fittings determines whether the media may leak. During the pipe fitting processing, it is often necessary to bend the pipe or weld elbows according to the needs of the conveying route, especially for pipe fittings with multiple elbows, their air tightness needs to be inspected before leaving the factory.

[0003] At present, the air tightness detection of existing pipe fittings usually adopts air pressure sensors or the method of observing bubbles by immersion in water, but both methods of air tightness detection require the corresponding pressurizing equipment to fill the pipeline with high-pressure gas for judgment. For example, the utility model patent with application number 2022233301122 discloses an air tightness detection device, including a main body, a connecting plate for limiting the pipeline is arranged inside the main body, and a limit plate for combining with the connecting plate is also arranged inside the main body. The ends of the connecting plate and the limit plate are both provided with a clamp for clamping the pipeline, and an extension plate for adjusting the clamping tightness is arranged at one end of the limit plate. The main body is also provided with a baffle for separating the internal space of the main body, and a bidirectional screw is arranged at the upper end of the baffle, and a sleeve plate is arranged on the outer side of both ends of the baffle, and a silicone pad for resisting the inner wall of the main body to fill the gap is arranged at one end of the sleeve plate. The air tightness detection device disclosed in the patent adopts the method of observing bubbles by immersion in water to perform air tightness detection, but there are some shortcomings when the device is used for double-headed elbow pipe fittings detection. First, the detection device requires supporting pressurizing equipment to fill the pipe with high-pressure gas, resulting in high manufacturing and operating costs for the entire set of equipment; second, the device cannot quickly seal the elbows at both ends of the pipe and can only be used to detect the air tightness of straight pipes; third, although the device can also perform air tightness tests on multiple pipes at one time, its overall loading and unloading process is complicated and cannot perform batch rapid testing on a large number of pipes. Therefore, in view of the above-mentioned deficiencies of existing air tightness detection devices, this application proposes a batch detection device for the sealing of double-headed elbow pipes that can effectively solve the above-mentioned technical problems. Summary of the invention

[0004] The present invention aims to provide a batch detection device for the sealing of double-ended elbow pipe fittings, so as to realize rapid, efficient and low-cost effective detection of the air tightness of double-ended elbow pipe fittings, so as to ensure the product quality of the double-ended elbow pipe fittings before leaving the factory.

[0005] The present invention is achieved through the following technical solutions: A batch detection device for the sealing of double-ended bent pipe fittings comprises a detection water tank and a display control cabinet, a lifting plate is arranged at the upper opening of the detection water tank, and a telescopic driving member for realizing the up and down movement of the lifting plate is arranged on the detection water tank, a row of rubber sealing heads arranged in pairs are arranged on the lifting plate, the lower end of each of the rubber sealing heads is connected to a corrugated telescopic tube, and the lower end of the corrugated telescopic tube is sealed and fixedly connected to the bottom wall of the detection water tank, a pipe clamping and sealing mechanism is arranged above the lifting plate, and the two ends of the double-ended bent pipe fittings fixed in the pipe clamping and sealing mechanism are aligned with a pair of rubber sealing heads, a transparent observation portion is arranged at the lower end of the rear side surface of the detection water tank, an industrial camera that moves horizontally along the length direction of the transparent observation portion is arranged on the rear side of the detection water tank, and the industrial camera is electrically connected to the display control cabinet.

[0006] As a further configuration of the above scheme, the lower ends of the two non-paired corrugated expansion tubes are connected to each other and are provided with an online detection component, the online detection component includes a piston cylinder and a connecting tube, a sealing piston is provided in the piston cylinder, the two connecting tubes are respectively connected to the two ends of the piston cylinder, and the other ends of the two connecting tubes are connected to the lower ends of the non-paired corrugated expansion tubes, a sensor for detecting the axial position of the sealing piston is provided on the piston cylinder, and the sensor is electrically connected to the display control cabinet.

[0007] As a further configuration of the above solution, the online detection assembly is connected to the lower ends of the two corrugated telescopic tubes in a one-by-one staggered or cross-staggered manner.

[0008] As a further configuration of the above scheme, the pipe clamping and sealing mechanism includes a bottom strip and a pressure strip which are rotatably connected at the ends, and a fastening mechanism is provided at the other ends of the bottom strip and the pressure strip. The opposite surfaces of the bottom strip and the pressure strip are provided with grooves for a common clamping function, and each groove is aligned with each pair of rubber sealing heads.

[0009] As a further configuration of the above scheme, a guide rod penetrating the lifting plate is provided at the lower end of the bottom bar, and a spring is connected between the bottom bar and the lifting plate. Interacting electromagnetic adsorption components are provided on the bottom bar and the lifting plate.

[0010] As a further configuration of the above scheme, a translation drive assembly for driving the industrial camera to move horizontally is arranged on the rear side of the inspection water tank, and the translation drive assembly includes a transmission frame fixedly connected to the inspection water tank, and the transmission frame is provided with mutually parallel transmission belts and horizontal rods. The industrial camera is connected to the transmission belt through a mounting seat, and the mounting seat is provided with a through hole that interacts with the horizontal rod, and the transmission frame is provided with a servo motor for realizing the operation of the transmission belt.

[0011] As a further configuration of the above solution, a vertically arranged sliding rod is arranged in the detection water tank, and a sliding hole matching the sliding rod is opened on the lifting plate.

[0012] As a further configuration of the above solution, an air hole communicating with the inner cavity of the bellows expansion tube is opened in the rubber sealing head, and an annular groove is opened on the upper surface of the rubber sealing head outside the air hole.

[0013] During use of the double-end bent pipe fittings sealing batch detection device disclosed in the present invention, the pressure strip is first opened from the bottom strip, and then a plurality of double-end bent pipe fittings are placed in the card slot one by one, and the two ends of the double-end bent pipe fittings are aligned downward with the rubber sealing head. After the loading is completed, the pressure strip is closed, and the plurality of double-end bent pipe fittings are clamped and fixed by a fastening mechanism, and then current is passed through the electromagnetic adsorption component, so that the entire row of fixed double-end bent pipe fittings are pressed downward under the action of magnetic attraction until the two ends of the double-end bent pipe fittings are pressed and sealed with the rubber sealing head.

[0014] Then, the telescopic drive is started to push the lifting plate downward, so that a row of double-ended curved pipe fittings all enter the pure water in the test tank. While the lifting plate is moving downward, each telescopic bellows can be compressed synchronously, thereby increasing the air pressure inside the bellows and double-ended curved pipe fittings until it drops to the set position and then the translation drive assembly and the industrial camera are started. The industrial camera moves horizontally during the translation drive assembly, and observes through the transparent observation part one by one whether there are bubbles at the corresponding double-ended curved pipe fittings in the interior during the movement. Once bubbles are generated, the control module inside the display control cabinet will immediately judge and record them, and at the same time, an alarm will be issued to remind the operator to store the double-ended curved pipe fittings with airtightness separately when retrieving materials later, and other double-ended curved pipe fittings without problems can be sent to the next process.

[0015] In addition, during the downward movement of the lifting plate, the online detection component can be used to detect whether the air pressure values ​​of the inspection cavities of different groups are significantly different. Once the difference is large but no bubbles appear when the double-ended bent pipe fitting enters the water, it can be determined that the bellows is damaged. Therefore, the operating personnel can be reminded to carry out maintenance in time to avoid air leakage due to damage to the bellows, which leads to insufficient air pressure during the air tightness detection of the double-ended bent pipe fittings.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The double-ended bent pipe fitting sealing batch detection device disclosed in the present invention adopts a bellows and a rubber sealing head to connect the double-ended bent pipe fitting and seal the double-ended bent pipe fitting with the rubber sealing head. Then, during the process of the double-ended bent pipe fitting being lowered and immersed in water, the internal space of the bellows can be reduced to increase the air pressure inside the double-ended bent pipe fitting to complete the detection. There is no need to add supporting equipment to fill compressed gas into the pipe fitting, thereby reducing the manufacturing and operating costs of the entire detection device.

[0017] The detection device disclosed in the present invention adopts a pipe clamping and sealing mechanism to clamp multiple double-ended bent pipe fittings at one time and seal them with a rubber sealing head, and captures bubbles through an industrial camera in the subsequent detection process to determine the air tightness of each double-ended bent pipe fitting; the entire detection device realizes automatic detection of batches of pipe fittings, greatly improves its detection efficiency, and can perform comprehensive detection on double-ended bent pipe fittings leaving the factory, thereby ensuring the quality of the products leaving the factory.

[0018] The present invention further provides an online detection component to detect the damage state of the corrugated expansion tube, which utilizes two sets of pressure differences during the detection process and judges the presence or absence of bubbles on the surface of the pipe fitting, so that the error of the pipe fitting detection result caused by the problem of the corrugated expansion tube itself can be discovered in time, thereby effectively improving the accuracy of its detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the back three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the detection water tank, lifting plate, corrugated telescopic tube, etc. in the present invention; Figure 4 It is a schematic diagram of the main plane structure of the lifting plate, the pipe clamping and sealing mechanism, etc. in the present invention; Figure 5 It is a schematic diagram of the cross-section internal structure of the rubber sealing head, the bellows expansion tube, etc. in the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the translation drive component, industrial camera, etc. in the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the bellows expansion tube, online detection components, etc. in Example 2 of the present invention; Figure 8 Schematic diagram of the internal planar structure of the online detection component in Example 2 of the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 8 , and describes the application in detail with reference to embodiments. Example 1

[0023] Embodiment 1 discloses a batch detection device for the sealing performance of double-ended elbow pipe fittings. Figures 1 to 3 The main body of the detection device includes a detection water tank 1, a display control cabinet 2 and a lifting plate 3. The lower surface of the detection water tank 1 is provided with a pad so that it can be stably set on the horizontal ground, and the upper end of the detection water tank 1 is opened, and the lifting plate 3 is set at the upper end opening of the detection water tank 1, and the display control cabinet 2 is installed at the outer end of the detection water tank 1.

[0024] A water injection pipe 101 and a drainage pipe 102 with valves are respectively arranged at the upper and lower ends of the front side of the detection water tank 1, and then a vertical upward sliding rod 103 is fixedly arranged at the four corners of the inner cavity of the detection water tank 1, and sliding holes matching the corresponding sliding rod 103 are opened at the four corners of the lifting plate 3. A bracket 104 is fixedly arranged at the upper end of the rear side of the detection water tank 1, and then a telescopic driving member 4 is arranged at the upper end of the bracket 104, and the telescopic end of the telescopic driving member 4 is connected to the lifting plate 3, so that the lifting plate 3 can be stably moved up and down under the drive of the telescopic driving member 4 and in cooperation with the guiding effect of the sliding rod 103. The specific telescopic driving member 4 can be selected from one of a cylinder or a hydraulic cylinder.

[0025] Reference Figure 3 , Attachment Figure 4 and attached Figure 5 A row of rubber sealing heads 5 arranged in pairs are provided on the lifting plate 3, and then a corrugated telescopic tube 6 is connected to the lower end of each rubber sealing head 5, and a sealing block 7 fixedly connected to the bottom wall of the detection water tank 1 is sealed and connected to the lower end of the corrugated telescopic tube 6. An air hole 501 connected to the inner cavity of the corrugated telescopic tube 6 is provided in the rubber sealing head 5. In addition, in order to realize that the rubber sealing head 5 can effectively seal the port of the double-headed curved pipe fitting 100, an annular groove 502 adapted to the port of the double-headed curved pipe fitting 100 is also provided on the upper surface of the rubber sealing head 5.

[0026] A pipe clamping and sealing mechanism 8 is arranged above the lifting plate 3, and the pipe clamping and sealing mechanism 8 includes a bottom strip 801 arranged between two rows of rubber sealing heads 5, and a first clamping groove 802 aligned with each pair of rubber sealing heads 5 is provided on the upper surface of the bottom strip 801. A pressure strip 803 is rotatably connected to one side end of the bottom strip 801 through a hinge, and then a second clamping groove 804 corresponding to each first clamping groove 802 is provided on the lower surface of the pressure strip 803, and finally a corresponding fastening mechanism 805 is provided at the closing part of the pressure strip 803 and the bottom strip 801. There are more specific design forms of the fastening mechanism 805, which can be implemented by means of a clamping groove buckle, bolt connection or magnetic attraction, etc. The fastening mechanism 805 shown in the figure of this embodiment is implemented by bolt connection.

[0027] Guide rods 806 are fixedly connected to both ends of the lower surface of the bottom bar 801, and the lower ends of the guide rods 806 are set through the lifting plate 3. A spring 807 is sleeved on the outer periphery of the guide rod 806, and the upper and lower ends of the spring 807 are respectively connected to the bottom bar 801 and the lifting plate 3. An electromagnet 808 is arranged in the lifting plate 3, and then a magnetic suction block 809 aligned with the electromagnet 808 is arranged on the lower surface of the bottom bar 801, so that after the electromagnet 808 is energized, a strong suction force can be generated on the magnetic suction block 809, so that the bottom bar 801 overcomes the supporting force of the spring 807 and moves downward, thereby realizing that a row of double-headed curved pipe fittings 100 being clamped move downward at the same time, until the two ends of the double-headed curved pipe fittings 100 are pressed in the corresponding annular groove 502 of the rubber sealing head 5 to achieve sealing. In addition, an empty shell 810 is seal-welded on the lower surface of the lifting plate 3, so that the lower ends of the guide rod 806 and the electromagnet 808 are both extended into the empty shell 810. At the same time, due to the existence of the empty shell 810, the drainage volume of the lifting plate 3 can be increased when it descends, so that the pure water in the detection tank 1 can quickly submerge the double-headed bent pipe fitting 100 to be detected.

[0028] Reference Figure 2 and attached Figure 6 A transparent observation part 105 is provided at the lower end of the rear side of the detection water tank 1. The transparent observation part 105 is composed of a horizontally long glass block, which is sealed and embedded in the opening on the rear side of the detection water tank 1. An industrial camera 9 for detecting bubbles is provided on the outer side of the transparent observation part 105, and the industrial camera 9 is electrically connected to the display control cabinet 2. The video processing module and the control module inside the display control cabinet 2 judge whether the double-headed bent pipe fitting leaks and produces bubbles based on the captured picture. In the specific design, in order to enable the industrial camera 9 to accurately capture the situation of each double-headed bent pipe fitting 100, a translation drive component 10 for driving the industrial camera 9 to move horizontally is also provided on the detection water tank 1 on the rear side of the transparent observation part 105.

[0029] In this embodiment 1, the translation drive assembly 10 includes a transmission frame 11, transmission wheels 12 are arranged at both ends of the transmission frame 11, and a servo motor 13 is connected to the end of one of the transmission wheels 12, and then a transmission belt 14 is arranged between the two transmission wheels 12. A mounting seat 15 is arranged at the upper end of the industrial camera 9, and the mounting seat 15 and the transmission belt 14 are fixedly connected. At the same time, a horizontal rod 16 parallel to the transmission belt 14 is arranged in the transmission frame 11, and a through hole adapted to the horizontal rod 16 is opened on the mounting seat 15, so that the industrial camera 9 can be moved at a uniform speed in the horizontal direction under the action of the transmission belt 14 and the horizontal rod 16, and during the movement, the industrial camera 9 captures the sealing state of the internal double-headed curved pipe 100 through the transparent observation part 105, and draws a conclusion and displays it after being processed by the display control cabinet 2. Example 2

[0030] Example 2 discloses a batch detection device for the sealing of double-ended bent pipe fittings, which is optimized and designed based on the technical solution in Example 1. It is mainly aimed at when the corrugated expansion tube 6 is damaged after long-term operation. During the descending process of the lifting plate 3, bubbles will be discharged from the damaged part of the corrugated expansion tube 6, thereby affecting the detection result of the sealing of the double-ended bent pipe fittings.

[0031] The similarities between Example 2 and Example 1 are not described again. Figure 7 and attached Figure 8 In this embodiment 2, an online detection component 17 is provided at the lower end of each group of bellows telescopic tubes 6. The online detection component 17 includes a piston cylinder 171 with sealed ends, and a sealing piston 172 is provided in the center of the piston cylinder 171, and then a sensor 173 for detecting the sealing piston 172 is provided at one side end of the piston cylinder 171. The specific sensor 173 can be a laser distance sensor, and the position of the sealing piston 172 can be detected by the sensor 173 to determine the air pressure difference at both ends. In addition, a connecting pipe 174 is provided at each end of the piston cylinder 171, and the connecting pipes 174 at both ends of the same piston cylinder 171 are connected to the non-paired blocking blocks 7, so that the air pressure inside the piston cylinder 171 on both sides of the sealing piston 172 is the same as the air pressure inside the corresponding bellows telescopic tube 6. In the specific connection, various methods such as dislocation one by one or cross dislocation can be adopted.

[0032] When the lifting plate 3 moves downward with the double-ended bent pipe 100, the bellows 6 will be compressed, thereby increasing the internal air pressure. At this time, when a bellows 6 is damaged and leaks, it is inevitable that the air pressure on the leaking side will decrease. Therefore, under the action of the air pressure difference, the sealing piston 172 will not be in the center of the piston cylinder 171. At this time, it can be detected by the sensor 173 and fed back to the display control cabinet 2, which will issue a timely alarm.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A batch detection device for the sealing performance of double-end elbow pipe fittings, comprising a detection water tank and a display control cabinet, characterized in that: A lifting plate is provided at the opening of the upper end of the detection water tank, and a telescopic driving member for realizing the up and down movement of the lifting plate is provided on the detection water tank, a row of rubber sealing heads arranged in pairs are provided on the lifting plate, the lower end of each of the rubber sealing heads is connected with a bellows telescopic tube, and the lower end of the bellows telescopic tube is sealed and fixedly connected to the bottom wall of the detection water tank, a pipe clamping and sealing mechanism is provided above the lifting plate, and the two ends of the double-headed bent pipe fixed in the pipe clamping and sealing mechanism are aligned with a pair of rubber sealing heads, a transparent observation part is provided at the lower end of the rear side surface of the detection water tank, an industrial camera that moves horizontally along the length direction of the transparent observation part is provided on the rear side of the detection water tank, and the industrial camera is electrically connected to the display control cabinet.

2. The double-end elbow sealing batch detection device according to claim 1 is characterized in that: The lower ends of the two non-paired corrugated expansion tubes are connected to each other and are provided with an online detection component, which includes a piston cylinder and a connecting tube. A sealing piston is provided in the piston cylinder. The two connecting tubes are respectively connected to the two ends of the piston cylinder, and the other ends of the two connecting tubes are connected to the lower ends of the non-paired corrugated expansion tubes. A sensor for detecting the axial position of the sealing piston is provided on the piston cylinder, and the sensor is electrically connected to the display control cabinet.

3. The double-end elbow sealing batch detection device according to claim 2 is characterized in that: The online detection component is connected to the lower ends of the two corrugated telescopic tubes in a one-by-one staggered or cross-staggered manner.

4. The double-end elbow sealing batch detection device according to claim 1 is characterized in that: The pipe clamping and sealing mechanism includes a bottom strip and a pressure strip which are rotatably connected at the ends, and a fastening mechanism is provided at the other ends of the bottom strip and the pressure strip. The opposite surfaces of the bottom strip and the pressure strip are provided with grooves for common clamping function, and each groove is aligned with each pair of rubber sealing heads.

5. The double-end elbow sealing batch detection device according to claim 4 is characterized in that: A guide rod penetrating the lifting plate is arranged at the lower end of the bottom bar, and a spring is connected between the bottom bar and the lifting plate. Interactive electromagnetic adsorption components are arranged on the bottom bar and the lifting plate.

6. The double-end elbow sealing batch detection device according to claim 1 is characterized in that: A translation drive assembly for driving the industrial camera to move horizontally is arranged on the rear side of the inspection water tank, and the translation drive assembly includes a transmission frame fixedly connected to the inspection water tank, and the transmission frame is provided with a transmission belt and a horizontal rod parallel to each other. The industrial camera is connected to the transmission belt through a mounting seat, and the mounting seat is provided with a through hole that interacts with the horizontal rod. A servo motor for realizing the operation of the transmission belt is arranged on the transmission frame.

7. The double-end elbow sealing batch detection device according to claim 1 is characterized in that: A vertically arranged sliding rod is arranged in the detection water tank, and a sliding hole matching the sliding rod is opened on the lifting plate.

8. The double-end elbow sealing batch detection device according to claim 1 is characterized in that: An air hole communicating with the inner cavity of the bellows expansion tube is provided in the rubber sealing head, and an annular groove is provided on the upper surface of the rubber sealing head outside the air hole.

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