Air tightness detection device for point cooling pipe and use method of air tightness detection device

Abstract

The invention relates to the field of airtightness detection of point cooling pipes, and discloses an airtightness detection device for point cooling pipes and a use method thereof.The airtightness detection device comprises a rack, a plugging mechanism and a detection mechanism are arranged on the rack, the detection mechanism comprises a water tank, the tank bottom of the water tank is in a table shape with the horizontal section decreasing progressively from top to bottom, and a bottom hole is formed in the bottom of the water tank; a water tank is arranged at the lower end of the bottom pipe, a first one-way valve is arranged at the joint of the water tank and the bottom pipe, a side pipe is arranged on one side of the bottom pipe, the tail end of the side pipe is connected with the water tank, and a second one-way valve is arranged at the joint of the tail end of the side pipe and the water tank. A piston is arranged in the water tank, a notch is formed in the side face of the water tank, a diaphragm piece is arranged in the notch, a camera is arranged above the water tank, a filter membrane close to the bottom of the water tank is arranged in the water tank, and the hole diameter of the filter membrane is gradually increased from the center to the periphery.

Description

Technical Field

[0001] The present invention relates to the field of detection equipment, specifically to the field of spot cooling pipe detection, and particularly to the field of spot cooling pipe air tightness detection. Background Art

[0002] Spot cooling pipes are used in mold cooling systems to rapidly cool injection or die-cast molds in a specific area, improving production efficiency and product quality. The airtightness of spot cooling pipes directly impacts the efficiency and lifespan of the mold cooling system. Leaks can lead to poor cooling, mold rust, and production delays. Therefore, spot cooling pipes require airtightness testing.

[0003] Prior art typically uses the bubble method to test the airtightness of cooling tubes. Specifically, the tubes are manually placed in water and visually inspected for bubbles. This method, when used for batch and continuous testing of cooling tubes, suffers from low efficiency, high subjectivity, and the tendency for false positives.

[0004] Based on a search for the above issues, it was discovered that the Chinese invention patent with authorization announcement number CN119023156B discloses a pipe air tightness detection device and method. The device automatically drives the pipe into the detection station of the detection chamber through a paddle to achieve sealing at both ends of the pipe, and then sinks it into a water storage tank. The pipe is ventilated through an air pipe and observed by a camera to understand the air tightness status of the pipe, thereby realizing automated air tightness detection. However, this detection technology still has some shortcomings. Specifically: First, when the pipe enters the water, it will cause ripples on the water surface, and when it comes out of the water, it will also produce splashes. After the water droplets on the surface of the pipe drip, it will cause larger ripples on the water surface. Secondly, the water surface should remain calm when the camera is shooting. If there are ripples and splashes, it will easily have a negative impact on the picture taken by the camera, thereby affecting the final detection results. Therefore, on the one hand, the ripples on the water surface when entering the water will affect the subsequent detection. On the other hand, the ripples and splashes on the water surface when coming out of the water are large, and it takes a long time to calm down. In batch continuous detection, it is very easy to affect the next detection process, resulting in low detection efficiency.

[0005] Based on the above problems, the present invention proposes an air tightness detection device for a spot cooling pipe and a method for using the same. Summary of the Invention

[0006] In order to solve the problems mentioned in the above background, the present invention provides an air tightness detection device for a spot cooling pipe and a method for using the same.

[0007] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows.

[0008] An airtightness detection device for a point cooling pipe, comprising a frame, on which a plugging mechanism and a detection mechanism are arranged. The detection mechanism includes a water tank, the bottom of the water tank is in a trapezoidal shape with a horizontal cross-section decreasing from top to bottom, and a bottom hole is arranged at the bottom of the water tank. A bottom pipe is arranged at the orifice of the bottom hole, a water tank is arranged at the lower end of the bottom pipe, and a check valve I is arranged at the connection between the two. A side pipe is arranged on one side of the bottom pipe, the end of the side pipe is connected to the water tank, and a check valve II is arranged at the connection between the two. The check valve I is used to make the water in the bottom pipe flow into the water tank unidirectionally, and the check valve II is used to make the water in the water tank flow into the side pipe unidirectionally; A piston is arranged in the water tank, a notch is arranged on the side of the water tank, a diaphragm is arranged in the notch, a camera is arranged above the water tank, a filter membrane close to the bottom of the water tank is arranged in the water tank, and the aperture of the filter membrane increases from the center to the periphery.

[0009] Further, the plugging mechanism includes a connecting frame connected to the frame, on which a support I, a support III, a linear module I for driving the support I to move horizontally, and a linear module III for driving the support III to move horizontally are arranged. The moving directions of the support I and the support III are perpendicular to each other; A support II and a linear module II for driving the support II to move vertically are arranged on the support I. A rotating frame is arranged on the support II, and an upper plugging assembly for plugging the threaded connection ends b and c of the point cooling pipe to be detected is arranged on the rotating frame. A side plugging assembly for plugging the ends of the outer cooling water pipe d and the inner cooling water pipe e of the point cooling pipe is arranged on the connecting frame.

[0010] Further, the rotating frame is rotationally connected to the support II, and the connecting shaft formed at the rotational connection is in power connection with a motor I arranged on the support II. The connecting shaft is parallel to the moving direction of the support III.

[0011] Further, a support base and a linear module V for driving the support base to move vertically are arranged on the support III, and the upper end of the support base is open; The upper plugging assembly includes a mounting hole I arranged on the upper surface of the rotating frame and a sliding seat slidably arranged on the rotating frame along the moving direction of the support III. A mounting hole II is arranged on the upper surface of the sliding seat, and plugging units are arranged in both the mounting hole I and the mounting hole II.

[0012] Further, one side of the support base along the moving direction of the support III is open, and a threaded shaft II is arranged threadedly on the other side; A spring I is arranged between the sliding seat and the rotating frame, and the elastic force of the spring I drives the sliding seat away from the mounting hole I. A threaded shaft I is arranged threadedly on the rotating frame, and both the threaded shaft I and the threaded shaft II are parallel to the moving direction of the support III.

[0013] Further, the plugging unit includes an upper plugging pipe sleeved in the first mounting hole or the second mounting hole. The upper end of the upper plugging pipe is closed and set in a polygonal shape, the lower end is open and provided with a threaded joint. A fixing ring and a sealing ring are arranged on the outside of the upper plugging pipe. The sealing ring is used to plug the upper orifice of the first mounting hole or the second mounting hole. The fixing ring is located above the sealing ring and a second spring is arranged between the two. A shoulder is arranged on the outside of the upper plugging pipe, and the upper surface of the shoulder abuts against the plane where the lower orifice of the first mounting hole or the second mounting hole is located.

[0014] Further, a ring groove is arranged on the outer cylindrical surface of the upper plugging pipe in the first mounting hole. The ring groove is communicated with the inner cavity of the upper plugging pipe through a side hole. A connecting channel communicated with the ring groove is arranged on the rotating frame, and an air supply pipe is arranged at the end of the connecting channel. An external step is arranged on the outside of the upper plugging pipe in the second mounting hole and below the shoulder. A third spring is arranged between the external step and the sliding seat.

[0015] Further, the upper plugging assembly further includes a second motor arranged at the upper end of the third support and above the support seat. The output end of the second motor is provided with a first screwing head arranged vertically. When the spot cooling pipe is placed on the support seat, the first screwing head is coaxial with the threaded connection end b of the spot cooling pipe.

[0016] Further, the side plugging assembly includes a fourth support slidably arranged on the connecting frame along the moving direction of the third support. A fourth spring is arranged on the side of the fourth support facing the support seat. A fifth support is slidably arranged on the fourth support in the vertical direction, and a fifth spring is arranged below the fifth support. A third motor is arranged on the fifth support. The output end of the third motor is provided with a second screwing head. A plug is coaxially inserted into the second screwing head. The end of the plug extends out of the second screwing head and is coaxially provided with a side plugging pipe. When the spot cooling pipe is placed on the support seat, the side plugging pipe is parallel to the spot cooling pipe and the axis lines of the two are located in the same vertical plane.

[0017] A method for using an airtightness detection device for a spot cooling pipe: Step 1: Plug the threaded connection end b, the threaded connection end c of the spot cooling pipe and the external cooling water pipe d through the plugging mechanism, and the external cooling water pipe d of the spot cooling pipe is communicated with the internal cooling water pipe e. Step 2: Pull the spot cooling pipe into the water tank. The gas sequentially passes through the air supply pipe, the connecting channel, the ring groove, the side hole and the upper plugging pipe in the first mounting hole and enters the spot cooling pipe, so that the spot cooling pipe is kept in a positive pressure state. Cooperating with the camera, the airtightness detection of the spot cooling pipe is realized. Step 3: After the detection is completed, the piston retracts, and the water in the water tank falls into the water tank through the bottom pipe until the water surface in the water tank is lower than the filter membrane. Step 4: After the spot cooling pipe leaves the water tank, the piston advances, and the water in the water tank gradually surges into the water tank through the side pipe.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. One of the cores of this solution lies in the airtightness detection process of the spot cooling tube: 1. During the process of the spot cooling tube entering the water and being detected, since the speed of the spot cooling tube is relatively slow, the water surface ripples are relatively light. Coupled with the buffering of the diaphragm, the water surface ripples are further reduced. Therefore, the camera can clearly capture the situation around the spot cooling tube underwater. 2. After the detection is completed, the piston retracts, and the water in the water tank falls into the water tank through the bottom tube until the water surface in the water tank is lower than the filter membrane. The advantages are as follows: on the one hand, when pulling the detected spot cooling tube away, the water droplets on the spot cooling tube fall onto the filter membrane, and the filter membrane plays a buffering role, preventing large fluctuations in the water surface in the water tank; on the other hand, the water is collected into the water tank. Since the water tank is full of water and there is no gas, and due to the incompressibility of water, the fluctuation of the water in the water tank is almost zero. After the spot cooling tube leaves the water tank, the piston advances, and the water in the water tank gradually surges into the water tank through the side tube. Therefore, by controlling the inflow speed, large fluctuations in the water surface in the water tank can be avoided. That is to say, compared with the prior art where the spot cooling tube is directly pulled away from the water tank, when the spot cooling tube leaves the water surface, it will cause large fluctuations in the water surface, and the subsequent water droplets falling on the spot cooling tube will further increase the water surface fluctuations, and these water surface fluctuations are difficult to calm down in a short time, thus affecting the airtightness detection of the next spot cooling tube. In contrast, this solution can solve this problem. Furthermore, the presence of the filter membrane, on the one hand, can prevent the water droplets on the spot cooling tube from falling and causing fluctuations in the water surface in the water tank. On the other hand, when the water returns to the water tank in a gushing form, there will be a "gushing spring" phenomenon, which will also cause fluctuations in the water surface. In this solution, the presence of the filter membrane and the pore size of the filter membrane increase from the center to the periphery. Therefore, the closer to the center of the filter membrane, the slower the water passes through the filter membrane. Therefore, the problem of water surface fluctuations caused by the gushing spring phenomenon can be solved, that is, the fluctuations of the water surface can be further reduced, and the water surface can be calmed down faster. Even further, initially, the filter membrane is loose. In this way, when the water is pumped into the water tank, the filter membrane bends downward under the action of the water flow. During the process of the water surging back into the water tank again, the filter membrane bends upward under the action of the water flow. The bending action change of the filter membrane will absorb a part of the water flow energy, so the fluctuations of the water surface can be further reduced.

[0019] 2. Another core of this solution lies in the process of plugging the spot cooling tube: 1. The setting of the second spring can ensure the sealing of the upper and lower orifices of the first mounting hole. The advantage is that in the subsequent airtightness test, the gas enters the upper plugging pipe in the first mounting hole through the air supply pipe, the connecting channel, the annular groove, and the side hole, and finally enters the spot cooling pipe. When plugging the threaded connection end b of the spot cooling pipe, the upper plugging pipe rotates continuously. After a long time, the seal between the first mounting hole and the upper plugging pipe is easily affected by wear, resulting in insufficient gas volume transported into the spot cooling pipe and continuous leakage, thus affecting the accuracy of the final airtightness test result. On the contrary, in this solution, due to the setting of the second spring ensuring the sealing of the upper and lower orifices of the first mounting hole, this problem does not exist; 2. In this solution, the setting of the first threaded shaft and the first spring is because the distances between the two threaded connection ends of spot cooling pipes of different models are different. Therefore, the distance between the first mounting hole and the second mounting hole can be adjusted through the first threaded shaft. However, this cannot ensure the absolute coaxiality between the second mounting hole and the threaded connection end c, and there will inevitably be some coaxiality errors. Therefore, this solution adopts the method of plugging the threaded connection end b first and then the threaded connection end c. The advantage is that when plugging the threaded connection end b, the threaded connection end c abuts against the upper plugging pipe in the second mounting hole. At this time, the tester can observe whether they are aligned. If not, the first threaded shaft can be appropriately rotated to align them. In this way, the subsequent threaded connection between the threaded connection end c and the upper plugging pipe in the second mounting hole can be carried out smoothly. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the spot cooling pipe; Figure 2 is the structural schematic of the present invention Figure 1 ; Figure 3 is the structural schematic of the present invention Figure 2 ; Figure 4 is the schematic of the plugging mechanism and the detection mechanism Figure 1 ; Figure 5 is the schematic of the plugging mechanism and the detection mechanism Figure 2 ; Figure 6 is the schematic diagram of the side plugging assembly; Figure 7 is the schematic diagram of the rotating frame and the upper plugging assembly; Figure 8 is the cross-sectional view of the upper plugging assembly; Figure 9 is the cross-sectional view of the plugging unit; Figure 10 is the schematic diagram of the detection mechanism; Figure 11Cross-sectional view of the detection mechanism; Figure 12 Schematic diagram of the water tank and the filter membrane.

[0021] The reference numerals in the drawings are as follows: 100, frame; 200, plugging mechanism; 201, connecting frame; 202, linear module 1; 203, bracket 1; 204, linear module 2; 205, bracket 2; 206, rotating frame; 2061, connecting channel; 207, motor 1; 208, air supply pipe; 209, sliding seat; 210, spring 1; 211, threaded shaft 1; 212, upper plugging pipe; 2121, threaded joint; 2122, annular groove; 2123, side hole; 2124, shaft shoulder; 2125, sealing ring; 2126, spring 2; 2127, fixing ring; 213, spring 3; 214, linear module 3; 215, bracket 3; 216, support seat; 217, threaded shaft 2; 218, motor 2; 219, screwing head 1; 220, bracket 4; 221, spring 4; 222, bracket 5; 223, spring 5; 224, motor 3; 225, screwing head 2; 226, side plugging pipe; 227, plug; 228, linear module 5; 300, detection mechanism; 301, water tank; 3011, diaphragm; 3012, air drying port; 3013, bottom hole; 302, camera; 303, fan; 304, bottom pipe; 3041, check valve 1; 305, side pipe; 3051, check valve 2; 306, water tank; 307, piston; 3071, filter element; 3072, drain pipe; 308, linear module 4; 309, filter membrane. Detailed implementation manners

[0022] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0023] Refer to Figure 1 , which shows a schematic diagram of the point cooling pipe to be detected, consisting of flange a, threaded connection end b, threaded connection end c, outer cooling water pipe d and inner cooling water pipe e, which is prior art and will not be elaborated herein.

[0024] Refer to Figures 1 - 12 , a hermeticity detection device for a point cooling pipe, comprising a frame 100 and a plugging mechanism 200 and a detection mechanism 300 provided on the frame 100.

[0025] I. Plugging mechanism 200 Refer to Figures 4 - 9, the plugging mechanism 200 includes a connecting frame 201 connected to the frame 100. A first support 203, a third support 215, a first linear module 202 for driving the first support 203 to move horizontally, and a third linear module 214 for driving the third support 215 to move horizontally are provided on the connecting frame 201. The moving directions of the first support 203 and the third support 215 are perpendicular to each other. Additionally, it should be noted that the linear modules mentioned in this solution all adopt existing electric telescopic rod technologies or existing screw linear movement technologies, etc., which will not be elaborated here.

[0026] A second support 205 and a second linear module 204 for driving the second support 205 to move vertically are provided on the first support 203.

[0027] A rotating frame 206 is rotatably installed on the second support 205, and the connecting shaft formed at the rotation installation location is power-connected to a first motor 207 provided on the second support 205. The connecting shaft is parallel to the moving direction of the third support 215.

[0028] An upper plugging assembly is provided on the rotating frame 206 for plugging the threaded connection ends b and c of the point cooling pipe to be detected.

[0029] Specifically, referring to Figure 5 , a support base 216 and a fifth linear module 228 for driving the support base 216 to move vertically are provided on the third support 215.

[0030] Referring to Figures 7 - 9 , the upper end of the support base 216 is open. One side of the support base 216 along the moving direction of the third support 215 is open, and a second threaded shaft 217 is threadedly provided on the other side. The second threaded shaft 217 is parallel to the moving direction of the third support 215; the point cooling pipe to be detected can be directly placed on the support base 216 until the point cooling pipe contacts the second threaded shaft 217. The second threaded shaft 217 plays a positioning role. Since the shape and size of different point cooling pipes are different, the positioning can be changed by screwing the second threaded shaft 217. Additionally, the threaded connection end of the point cooling pipe faces upward.

[0031] The upper plugging assembly includes a first mounting hole provided on the upper surface of the rotating frame 206 and a sliding seat 209 slidably provided on the rotating frame 206 along the moving direction of the third support 215. A first spring 210 is provided between the sliding seat 209 and the rotating frame 206. The elastic force of the first spring 210 is used to drive the sliding seat 209 away from the first mounting hole. A second mounting hole is provided on the upper surface of the sliding seat 209. A first threaded shaft 211 is also threadedly provided on the rotating frame 206. By the cooperation of the first threaded shaft 211 and the first spring 210, the distance between the first mounting hole and the second mounting hole can be changed.

[0032] A plugging unit is provided in each of the first mounting hole and the second mounting hole.

[0033] The plugging unit includes an upper plugging pipe 212 sleeved in the first installation hole or the second installation hole. The upper end of the upper plugging pipe 212 is closed and set in a polygonal shape, and the lower end is open and provided with a threaded joint 2121. Further, a fixing ring 2127 and a sealing ring 2125 are arranged on the outer part of the upper plugging pipe 212. The sealing ring 2125 is used to plug the upper orifice of the first installation hole or the second installation hole. The fixing ring 2127 is located above the sealing ring 2125, and a second spring 2126 is arranged between the two. A shoulder 2124 is arranged on the outer part of the upper plugging pipe 212. The upper surface of the shoulder 2124 abuts against the plane where the lower orifice of the first installation hole or the second installation hole is located. Therefore, under the elastic force of the second spring 2126, the sealing ring 2125 always abuts against the upper orifice of the first installation hole or the second installation hole, and the upper surface of the shoulder 2124 always abuts against the lower orifice of the first installation hole or the second installation hole, and the orifices of the first installation hole or the second installation hole are always sealed.

[0034] In addition: A ring groove 2122 is arranged on the outer circumferential surface of the upper plugging pipe 212 of the plugging unit in the first installation hole. The ring groove 2122 is communicated with the inner cavity of the upper plugging pipe 212 through a side hole 2123. A connecting channel 2061 communicated with the ring groove 2122 is arranged on the rotating frame 206. The end of the connecting channel 2061 is provided with an air supply pipe 208, and the end of the air supply pipe 208 is communicated with equipment such as an air pump.

[0035] An external step is arranged on the outer part of the upper plugging pipe 212 of the plugging unit in the second installation hole and is located below the shoulder 2124. A third spring 213 is arranged between the external step and the sliding seat 209.

[0036] Refer to Figure 5 And Figure 7 The upper plugging assembly further includes a second motor 218 arranged at the upper end of the third support 215 and located above the support seat 216. The output end of the second motor 218 is provided with a first screwing head 219 arranged vertically. When the spot cooling pipe is placed on the support seat 216, the first screwing head 219 is coaxial with the threaded connection end b of the spot cooling pipe.

[0037] Therefore, the process of plugging the threaded connection ends b and c of the spot cooling pipe is specifically as follows: Place the spot cooling pipe on the support seat 216 so that the spot cooling pipe contacts the first threaded shaft 211. At this time, the threaded connection end b is coaxial with the first screwing head 219; Then drive the third support 215 to move through the third linear module 214 so that the first installation hole is coaxial with the first screwing head 219; Then drive the second support 205 to move upward through the second linear module 204. The second support 205 drives the rotating frame 206 to move upward, so that the upper plugging pipe 212 in the first installation hole and the first screwing head 219 are inserted; Then, the linear module five 228 drives the support base 216 to move upward. The support base 216 drives the spot cooling tube to move upward together. The motor two 218 drives the first screwing head 219 to rotate. The first screwing head 219 drives the upper sealing tube 212 to rotate together. With the cooperation of the two, the upper sealing tube 212 in the first mounting hole can be threadedly connected to the threaded connection end b of the spot cooling tube. During this process, the threaded connection end c of the spot cooling tube abuts against the upper sealing tube 212 in the second mounting hole, and the third spring 213 is compressed; Then, the linear module five 228 drives the support base 216 to move downward. The spot cooling tube remains in its current position and disengages from the support base 216. The linear module two 204 drives the second support 205 to move downward, causing the first screwing head 219 to disengage from the insertion; Then, the linear module three 214 drives the third support 215 to move, making the second mounting hole coaxial with the first screwing head 219; Then, the linear module two 204 drives the second support 205 to move upward, causing the upper sealing tube 212 in the second mounting hole and the first screwing head 219 to complete the insertion; Then, the motor two 218 drives the first screwing head 219 to rotate. The upper sealing tube 212 in the second mounting hole rotates and moves downward at the same time to complete the threaded connection with the threaded connection end c of the spot cooling tube. It should be noted that since there is a certain distance at the upper end of the upper sealing tube 212 with a polygonal shape, after the threaded connection is completed, the upper sealing tube 212 in the second mounting hole and the first screwing head 219 still remain inserted.

[0038] As can be seen from the above description: 1. The setting of the second spring 2126 can ensure the sealing of the upper and lower orifices of the first mounting hole. The advantage is that in the subsequent airtightness test, the gas enters the upper sealing tube 212 in the first mounting hole and finally into the spot cooling tube through the air supply pipe 208, the connection channel 2061, the annular groove 2122, and the side hole 2123. When sealing the threaded connection end b of the spot cooling tube, the upper sealing tube 212 rotates continuously. After a long time, the seal between the first mounting hole and the upper sealing tube 212 is likely to be affected by wear, resulting in insufficient gas delivered to the spot cooling tube and continuous leakage, thus affecting the accuracy of the final airtightness test result. On the contrary, in this solution, due to the setting of the second spring 2126 ensuring the sealing of the upper and lower orifices of the first mounting hole, this problem does not exist; 2. In this solution, the threaded shaft 1 (211) and the spring 1 (210) are provided because the distances between the two threaded connection ends of the spot cooling pipes of different models are different. Therefore, the distance between the first mounting hole and the second mounting hole can be adjusted by the threaded shaft 1 (211). However, this cannot guarantee the absolute coaxiality between the second mounting hole and the threaded connection end c, and there will inevitably be some coaxiality errors. Therefore, in this solution, the threaded connection end b is blocked first, and then the threaded connection end c is blocked. The advantage is that when blocking the threaded connection end b, the threaded connection end c abuts against the upper blocking pipe 212 in the second mounting hole. At this time, the tester can observe whether they are aligned. If not, the threaded shaft 1 (211) can be appropriately screwed to align them. In this way, the subsequent threaded connection between the threaded connection end c and the upper blocking pipe 212 in the second mounting hole can be carried out smoothly.

[0039] Referring to Figure 4 and Figure 5 , a side blocking assembly is further provided on the connecting frame 201 on the side of the threaded connection end c of the spot cooling pipe located on the support 216 away from the threaded connection end b, for blocking the ends of the outer cooling water pipe d and the inner cooling water pipe e of the spot cooling pipe.

[0040] Specifically, referring to Figures 4 - 6 , the side blocking assembly includes a support 4 (220) slidably provided on the connecting frame 201 along the moving direction of the support 3 (215), and a spring 4 (221) is provided on the side of the support 4 (220) facing the support 216.

[0041] A support 5 (222) is slidably provided on the support 4 (220) in the vertical direction, and a spring 5 (223) is provided below the support 5 (222).

[0042] A motor 3 (224) is provided on the support 5 (222), and a screwing head 2 (225) is provided at the output end of the motor 3 (224). A plug 227 is coaxially inserted into the screwing head 2 (225), and the end of the plug 227 extends out of the screwing head 2 (225) and a side blocking pipe 226 is coaxially provided.

[0043] When the spot cooling pipe is placed on the support 216, the side blocking pipe 226 is parallel to the spot cooling pipe and the axis lines of the two are in the same vertical plane.

[0044] After completing the blocking of the threaded connection ends b and c of the spot cooling pipe, the tester manually moves the support 4 (220) and the support 5 (222) so that the inner cooling water pipe e of the spot cooling pipe is inserted into the side blocking pipe 226, and the end of the outer cooling water pipe d abuts against the side blocking pipe 226. Then, the motor 3 (224) drives the screwing head 2 (225) to rotate, so that the side blocking pipe 226 rotates, thereby realizing the threaded connection between the side blocking pipe 226 and the outer cooling water pipe d. After that, the tester releases the hand, and the spring 4 (221) releases the elastic force, and the plug 227 disengages from the screwing head 2 (225); Thus, the plugging of the threaded connection end b, the threaded connection end c, the outer cooling water pipe d, and the inner cooling water pipe e of the spot cooling pipe is completed.

[0045] II. Detection mechanism 300 Refer to Figure 2 and Figure 3 , the detection mechanism 300 is located on one side of the plugging mechanism 200.

[0046] Refer to Figure 10 and Figure 11 , the detection mechanism 300 includes a water tank 301. When the spot cooling pipe is plugged by the plugging mechanism 200, the spot cooling pipe is simultaneously connected to the support one 203 of the plugging mechanism 200. Therefore, the spot cooling pipe can be pulled above the water tank 301 by the linear module one 202, and then the spot cooling pipe is pulled down by the linear module two 204 to enter the water tank 301.

[0047] The bottom of the water tank 301 is in the shape of a trapezoid with a horizontal cross-section decreasing from top to bottom, and a bottom hole 3013 is provided at the bottom of the bottom of the water tank 301. A bottom pipe 304 is provided at the bottom of the bottom hole 3013. A water tank 306 is provided at the lower end of the bottom pipe 304, and a one-way valve one 3041 is provided at the connection between the two. A side pipe 305 is provided on one side of the bottom pipe 304. The end of the side pipe 305 is connected to the water tank 306, and a one-way valve two 3051 is provided at the connection between the two.

[0048] The one-way valve one 3041 is used to make the water in the bottom pipe 304 flow into the water tank 306 unidirectionally, and the one-way valve two 3051 is used to make the water in the water tank 306 flow into the side pipe 305 unidirectionally. The one-way valve technology is an existing technology and can be realized without further description.

[0049] A piston 307 is provided in the water tank 306, and the piston 307 is driven by the linear module four 308 to move in the water tank 306.

[0050] A notch is provided on the side of the water tank 301, and a diaphragm 3011 is provided in the notch. The diaphragm 3011 is made of a soft elastic material and is also called a vibrating membrane, which can well absorb the energy of vibration and impact and play a buffering role.

[0051] Preferably, a drying port 3012 is provided on the side of the water tank 301, and a fan 303 is provided at the drying port 3012 for drying the spot cooling pipe when the spot cooling pipe leaves the water tank 301.

[0052] A camera 302 is provided above the water tank 301.

[0053] Preferably, a drain pipe 3072 is provided at the bottom of the water tank 306, and a solenoid valve is provided on the drain pipe 3072 for draining the dirty water when changing the water after the water gets dirty.

[0054] Preferably, a filter element 3071 is provided inside the water tank 306, and the filter element 3071 is close to the second one-way valve 3051.

[0055] Furthermore, referring to Figure 12 , a filter membrane 309 is provided inside the water tank 301 close to the bottom of the tank. The filter membrane 309 can be realized by the prior art and will not be elaborated here. The aperture of the filter membrane 309 increases from the center to the periphery, that is, the closer to the center, the smaller the aperture, and the closer to the side, the larger the aperture.

[0056] The working process of the detection mechanism 300 is as follows: After the traction point cooling tube enters the water tank 301, gas is injected into the point cooling tube, and at the same time, the rotating frame 206 is driven to rotate by the first motor 207. The rotating frame 206 drives the point cooling tube to slowly rotate one circle, and in cooperation with the camera 302, airtightness detection is realized; During the above-mentioned water entry and detection processes, since the speed is relatively slow, the ripples on the water surface are relatively light. Coupled with the buffering of the diaphragm 3011, the ripples on the water surface are further reduced. Therefore, the camera 302 can clearly capture the situation around the point cooling tube under the water; After the detection is completed, the piston 307 retracts, and the water in the water tank 301 falls into the water tank 306 through the bottom pipe 304 until the water surface in the water tank 301 is lower than the filter membrane 309. The advantages are as follows: on the one hand, when the point cooling tube after the traction and detection leaves, the water droplets on the point cooling tube fall onto the filter membrane 309, and the filter membrane 309 plays a buffering role and will not cause large fluctuations in the water surface in the water tank 301; on the other hand, the water is collected into the water tank 306. Since the water tank 306 is full of water and there is no gas, and due to the incompressibility of water, the fluctuations of the water in the water tank 306 are almost zero; After the point cooling tube leaves the water tank 301, the piston 307 advances, and the water in the water tank 306 gradually surges into the water tank 301 through the side pipe 305. Therefore, by controlling the inflow speed, large fluctuations in the water surface in the water tank 301 can be avoided. That is to say, compared with the prior art, when directly pulling the point cooling tube out of the water tank 301, at the moment when the point cooling tube leaves the water surface, it will cause large fluctuations in the water surface, and the subsequent water droplets falling on the point cooling tube will further cause the water surface fluctuations to become larger, and these water surface fluctuations are difficult to calm down in a short time. Therefore, it will affect the airtightness detection of the next point cooling tube. On the contrary, in this solution, large fluctuations in the water surface can be avoided, that is, this problem can be solved. In addition: The presence of the filter membrane 309, on the one hand, can prevent water droplets on the spot cooling pipe from dripping and causing fluctuations in the water surface in the water tank 301. On the other hand, when the water returns to the water tank 301 in a gushing form, there will be a "gushing spring" phenomenon, which will also cause fluctuations in the water surface. In this solution, the presence of the filter membrane 309 and the aperture of the filter membrane 309 increase from the center to the periphery. Therefore, the closer to the center of the filter membrane 309, the slower the water passes through the filter membrane 309. Therefore, it can solve the problem of water surface fluctuations caused by the gushing spring phenomenon, that is, it can further reduce the fluctuations of the water surface and make the water surface calm down faster. Furthermore, as Figure 12 shown in the first figure of Figure 12 At the beginning, the filter membrane 309 is taut and has the above effects. On this basis, further, as Figure 12 shown in the second and third figures of

[0057] At the beginning, the filter membrane 309 is loose. In this way, when the water is pumped into the water tank 306, the filter membrane 309 bends downward under the action of the water flow, as

[0058] shown in the second figure. During the process of the water gushing back into the water tank 301 again, under the action of the water flow, the filter membrane 309 bends upward, and the bending action change of the filter membrane 309 will absorb a part of the water flow energy. Therefore, it can further reduce the fluctuations of the water surface. It should be noted that: This solution can replace manual inspection of the spot cooling pipe, realize batch and continuous automatic inspection of the spot cooling pipe, combine high-precision cameras and intelligent algorithms to judge bubble leakage defects, ensure the safety and stability of the inspection process, and record data for production archiving records, that is, assisted by AI vision inspection to improve the inspection quality and efficiency. If bubbles are detected, it is unqualified, then the red light alarms and the inspection stops. If no bubbles are detected, it is qualified and the green light passes. The specific inspection algorithm logic program is not the innovation subject of this solution and will not be elaborated here. For example, it can be controlled by PLC programming.

[0058] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to be equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An airtightness detection device for a point cooling pipe, comprising a frame (100), wherein a plugging mechanism (200) and a detection mechanism (300) are arranged on the frame (100), and it is characterized in that, The detection mechanism (300) includes a water tank (301). The bottom of the water tank (301) has a trapezoidal shape with a horizontal cross-section decreasing from top to bottom, and a bottom hole (3013) is provided at the bottom of the water tank (301). A bottom pipe (304) is provided at the orifice of the bottom hole (3013). A water tank (306) is provided at the lower end of the bottom pipe (304), and a check valve one (3041) is provided at the connection between the two. A side pipe (305) is provided on one side of the bottom pipe (304). The end of the side pipe (305) is connected to the water tank (306), and a check valve two (3051) is provided at the connection between the two. The check valve one (3041) is used to make the water in the bottom pipe (304) flow into the water tank (306) unidirectionally, and the check valve two (3051) is used to make the water in the water tank (306) flow into the side pipe (305) unidirectionally; A piston (307) is provided in the water tank (306). There is a notch on the side of the water tank (301), and a diaphragm (3011) is provided in the notch. A camera (302) is provided above the water tank (301). A filter membrane (309) close to the bottom of the water tank (301) is provided in the water tank (301). The pore diameter of the filter membrane (309) increases from the center to the periphery.

2. The airtightness detection device for a point cooling pipe according to claim 1, wherein The plugging mechanism (200) includes a connecting frame (201) connected to the frame (100). A support one (203), a support three (215), a linear module one (202) for driving the support one (203) to move horizontally, and a linear module three (214) for driving the support three (215) to move horizontally are provided on the connecting frame (201). The moving directions of the support one (203) and the support three (215) are perpendicular to each other; A support two (205) and a linear module two (204) for driving the support two (205) to move vertically are provided on the support one (203). A rotating frame (206) is provided on the support two (205). An upper plugging assembly for plugging the threaded connection ends b and c of the cold pipe at the point to be detected is provided on the rotating frame (206). A side plugging assembly for plugging the ends of the outer cooling water pipe d and the inner cooling water pipe e of the point cold pipe is provided on the connecting frame (201).

3. An airtightness detection device for a point cooling tube according to claim 2, characterized in that, The rotating frame (206) is rotatably connected to the support two (205), and the connecting shaft formed at the rotating connection is in power connection with a motor one (207) provided on the support two (205). The connecting shaft is parallel to the moving direction of the support three (215).

4. The airtightness detection device for a point cooling tube according to claim 2, characterized in that, A support seat (216) and a linear module five (228) for driving the support seat (216) to move vertically are provided on the support three (215). The upper end of the support seat (216) is open; The upper plugging assembly includes a mounting hole one provided on the upper surface of the rotating frame (206) and a sliding seat (209) slidably provided on the rotating frame (206) along the moving direction of the support three (215). A mounting hole two is provided on the upper surface of the sliding seat (209). Plugging units are provided in both the mounting hole one and the mounting hole two.

5. An airtightness detection device for a point cooling tube according to claim 4, characterized in that, One side of the support seat (216) along the moving direction of the support three (215) is open, and a threaded shaft two (217) is threadedly provided on the other side; A first spring (210) is provided between the sliding seat (209) and the rotating frame (206). The elastic force of the first spring (210) drives the sliding seat (209) away from the first mounting hole. A first threaded shaft (211) is provided on the rotating frame (206) in a threaded manner. Both the first threaded shaft (211) and the second threaded shaft (217) are parallel to the moving direction of the third support (215).

6. An airtightness detection device for a point cooling tube according to claim 4, characterized in that, The plugging unit includes an upper plugging pipe (212) sleeved in the first mounting hole or the second mounting hole. The upper end of the upper plugging pipe (212) is closed and is set in a polygonal shape, and the lower end is open and is provided with a threaded joint (2121). A fixing ring (2127) and a sealing ring (2125) are provided on the outside of the upper plugging pipe (212). The sealing ring (2125) is used to plug the upper orifice of the first mounting hole or the second mounting hole. The fixing ring (2127) is located above the sealing ring (2125), and a second spring (2126) is provided between them. A shoulder (2124) is provided on the outside of the upper plugging pipe (212), and the upper surface of the shoulder (2124) abuts against the plane where the lower orifice of the first mounting hole or the second mounting hole is located.

7. An airtightness detection device for a point cooling tube according to claim 6, characterized in that, A ring groove (2122) is provided on the outer cylindrical surface of the upper plugging pipe (212) in the first mounting hole. The ring groove (2122) is communicated with the inner cavity of the upper plugging pipe (212) through a side hole (2123). A connecting channel (2061) communicated with the ring groove (2122) is provided on the rotating frame (206), and an air supply pipe (208) is provided at the end of the connecting channel (2061). An external step is provided on the outside of the upper plugging pipe (212) in the second mounting hole and is located below the shoulder (2124). A third spring (213) is provided between the external step and the sliding seat (209).

8. An airtightness detection device for a point cooling pipe according to claim 7, characterized in that, The upper plugging assembly further includes a second motor (218) provided at the upper end of the third support (215) and above the support seat (216). A first screwing head (219) arranged vertically is provided at the output end of the second motor (218). After the spot cooling pipe is placed on the support seat (216), the first screwing head (219) is coaxial with the threaded connection end b of the spot cooling pipe.

9. An airtightness detection device for a point cooling pipe according to claim 8, characterized in that, The side plugging assembly includes a fourth support (220) slidably arranged on the connecting frame (201) along the moving direction of the third support (215), and a fourth spring (221) is provided on the side of the fourth support (220) facing the support seat (216). A fifth support (222) is slidably arranged on the fourth support (220) in the vertical direction, and a fifth spring (223) is provided below the fifth support (222). A third motor (224) is provided on the fifth support (222). A second screwing head (225) is provided at the output end of the third motor (224) in a power-driven manner. A plug (227) is coaxially inserted into the second screwing head (225). The end of the plug (227) extends out of the second screwing head (225) and is coaxially provided with a side plugging pipe (226). When the spot cooling pipe is placed on the support seat (216), the side plugging pipe (226) is parallel to the spot cooling pipe, and their axis lines are located in the same vertical plane.

10. The method for using an airtightness detection device for a point cooling pipe according to claim 7 or 9, characterized in that, It includes the following steps: Step 1: The plugging mechanism (200) is used to plug the threaded connection ends b and c of the spot cooling pipe and the external cooling water pipe d, and the external cooling water pipe d of the spot cooling pipe is communicated with the internal cooling water pipe e; Step 2: The spot cooling pipe is towed into the water tank (301). The gas sequentially passes through the air supply pipe (208), the connection channel (2061), the annular groove (2122), the side hole (2123), and the upper plugging pipe (212) in the first mounting hole and enters the spot cooling pipe, so that the spot cooling pipe maintains a positive pressure state. With the cooperation of the camera (302), the airtightness detection of the spot cooling pipe is realized; Step 3: After the detection is completed, the piston (307) retreats, and the water in the water tank (301) falls into the water tank (306) through the bottom pipe (304) until the water surface in the water tank (301) is lower than the filter membrane (309); Step 4: After the spot cooling pipe leaves the water tank (301), the piston (307) advances, and the water in the water tank (306) gradually surges into the water tank (301) through the side pipe (305).

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