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 application relates to the field of detection equipment, specifically to the field of point cooling pipe detection, particularly to the field of point cooling pipe air tightness detection. BACKGROUND

[0002] Point cooling pipe refers to the point cooling pipe in the mold cooling system, mainly used for local rapid cooling of injection mold or die casting mold to improve production efficiency and product quality. The air tightness of the point cooling pipe directly affects the efficiency and service life of the mold cooling system, and if there is leakage, it may cause poor cooling, mold rust or production delay. Therefore, the point cooling pipe needs to be detected for air tightness.

[0003] In the prior art, the point cooling pipe is generally detected for air tightness by using the bubble method. Specifically, the point cooling pipe is put into water by manual, and the air tightness of the point cooling pipe is detected by visual observation. When the point cooling pipe is detected in batch and continuously by using this method, there are problems of low efficiency, strong subjectivity and easy to make mistakes.

[0004] Based on the search for the above problems, it is found that the Chinese invention with the authorization announcement number CN119023156B discloses a pipe air tightness detection device and method. The pipe is automatically driven into the detection position of the detection bin by the dial piece, the two ends of the pipe are sealed, then the pipe is sunk into the water storage tank, the pipe is ventilated by the gas pipe, and the air tightness state of the pipe is observed by the camera to realize automatic detection of air tightness. However, this detection technology still has some deficiencies. Specifically, first, when the pipe enters the water, it will cause ripples on the water surface. When the pipe comes out of the water, it will also cause splashes and water droplets on the surface of the pipe, which will cause larger ripples on the water surface. Second, when the camera shoots, the water surface should be calm. If there are ripples and splashes, it will easily affect the picture taken by the camera, thereby affecting the final detection result. Therefore, on the one hand, the water surface ripples when the pipe enters the water will affect the subsequent detection, and on the other hand, the water surface ripples and splashes when the pipe comes out of the water are large, and it takes a long time to calm down. When batch and continuous detection is carried out, it is very easy to affect the next detection process, resulting in low detection efficiency.

[0005] Based on the above problems, the present application provides a point cooling pipe air tightness detection device and its use method. SUMMARY

[0006] To solve the problems mentioned in the background, the present application provides a point cooling pipe air tightness detection device and its use method.

[0007] To achieve the above technical purpose, the technical solution adopted by the present application is as follows.

[0008] The utility model provides a kind of airtightness detection device for point cold tube, including rack, and sealing mechanism and detection mechanism are provided on rack, detection mechanism includes water tank, the bottom of water tank is trapezoidal shape that horizontal section decreases from top to bottom, and bottom of water tank is provided with bottom hole, and the orifice of bottom hole is provided with bottom pipe, the lower end of bottom pipe is provided with water tank and the connecting place of both is provided with one-way valve one, one side of bottom pipe is provided with side pipe, and the end of side pipe is connected with water tank and the connecting place of both is provided with one-way valve two, one-way valve one is used to make water in bottom pipe one-way flow into water tank, and one-way valve two is used to make water in water tank one-way flow into side pipe; Water tank is provided with a piston, the side of water tank is provided with a notch, the notch is provided with a diaphragm, the upper part of water tank is provided with a camera, and the water tank is provided with a filter membrane close to the bottom.

[0009] Further, the sealing mechanism includes a connecting frame connected to the rack, the connecting frame is provided with a first support, a third support, a first linear module for moving the first support in a horizontal direction, and a third linear module for moving the third support in a horizontal direction, the moving directions of the first support and the third support are perpendicular to each other. The first support is provided with a second support and a second linear module for moving the second support in a vertical direction, the second support is provided with a rotating frame, the rotating frame is provided with an upper sealing assembly for sealing the threaded connection end b and the threaded connection end c of the point cold tube to be detected, and the connecting frame is provided with a side sealing assembly for sealing the ends of the outer cooling water pipe d and the inner cooling water pipe e of the point cold tube.

[0010] Further, the rotating frame is rotationally connected to the second support, and a connecting shaft formed by the rotational connection is in power connection with a first motor provided on the second support, and the connecting shaft is parallel to the moving direction of the third support.

[0011] Further, the third support is provided with a holder and a fifth linear module for moving the holder in a vertical direction, and the upper end of the holder is open. The upper sealing assembly includes a mounting hole one provided on the upper surface of the rotating frame and a sliding seat provided on the rotating frame in the moving direction of the third support, the upper surface of the sliding seat is provided with a mounting hole two, and the mounting hole one and the mounting hole two are provided with sealing units.

[0012] Further, one side of the holder in the moving direction of the third support is open, and the other side is provided with a threaded shaft two in a threaded manner. A spring one is provided between the sliding seat and the rotating frame, the spring one drives the sliding seat to move away from the mounting hole one by elastic force, a threaded shaft one is provided on the rotating frame in a threaded manner, and the threaded shaft one and the threaded shaft two are parallel to the moving direction of the third support.

[0013] Further, the plugging unit comprises an upper plugging pipe sleeved in the first mounting hole or the second mounting hole, an upper end of the upper plugging pipe is closed and is provided in a polygonal shape, a lower end of the upper plugging pipe is open and is provided with a threaded joint, an outer portion of the upper plugging pipe is provided with a fixing ring and a sealing ring, the sealing ring is used for plugging an upper hole of the first mounting hole or the second mounting hole, the fixing ring is located above the sealing ring and a spring II is arranged between the fixing ring and the sealing ring, an outer portion of the upper plugging pipe is provided with an axial shoulder, an upper surface of the axial shoulder is in abutment with a plane where a lower hole of the first mounting hole or the second mounting hole is located.

[0014] Further, an outer circumferential surface of the upper plugging pipe in the first mounting hole is provided with an annular groove, the annular groove is in communication with an inner cavity of the upper plugging pipe through a side hole, a rotating frame is provided with a connecting channel in communication with the annular groove, and an end of the connecting channel is provided with a gas feeding pipe. An outer portion of the upper plugging pipe in the second mounting hole is provided with an external step located below the axial shoulder, and a spring III is arranged between the external step and the sliding seat.

[0015] Further, the upper plugging assembly further comprises a motor II arranged on an upper end of the bracket III and located above the support seat, and an output end of the motor II is provided with a vertical screw head I, when the point cooling pipe is placed on the support seat, the screw head I is coaxial with the threaded connection end b of the point cooling pipe.

[0016] Further, the side plugging assembly comprises a bracket IV slidingly arranged on the connecting frame along a moving direction of the bracket III, and a spring IV is arranged on a side of the bracket IV facing the support seat, a bracket V is slidingly arranged on the bracket IV in a vertical direction, and a spring V is arranged below the bracket V. The bracket V is provided with a motor III, a power output end of the motor III is provided with a screw head II, a plug is coaxially inserted into the screw head II, an end of the plug extends out of the screw head II and is coaxially provided with a side plugging pipe, when the point cooling pipe is placed on the support seat, the side plugging pipe is parallel to the point cooling pipe, and axial lines of the two are located in a same vertical plane.

[0017] A use method of the air tightness detection device for the point cooling pipe: Step one: the threaded connection end b, the threaded connection end c and the outer cooling water pipe d of the point cooling pipe are plugged by the plugging mechanism, and the outer cooling water pipe d of the point cooling pipe is in communication with the inner cooling water pipe e; Step two: the point cooling pipe is pulled into the water tank, air enters the point cooling pipe through the gas feeding pipe, the connecting channel, the annular groove, the side hole and the upper plugging pipe in the first mounting hole in sequence, so that the point cooling pipe is kept in a positive pressure state, and the air tightness of the point cooling pipe is detected in cooperation with the camera; Step three: after the detection is completed, the piston retreats, 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 four: after the point cooling pipe leaves the water tank, the piston advances, and the water in the water tank gradually flows into the water tank through the side pipe.

[0018] Compared with the prior art, the present application has the beneficial effects that: One of the cores of the present application is that in the air tightness detection process of the point cooling pipe: 1、During the process of the point cooling pipe entering water and detection, the speed of the point cooling pipe is relatively slow, therefore, the ripples of the water surface are relatively light, and the buffer of the diaphragm further reduces the ripples of the water surface, therefore, the camera can clearly capture the situation around the point cooling pipe under the water; 2、After the detection is completed, the piston retreats, 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, the advantage is that: on the one hand, when the point cooling pipe after the detection is pulled away, the water droplets on the point cooling pipe fall on the filter membrane, the filter membrane plays a buffering role and does not cause the water surface in the water tank to produce large fluctuations; on the other hand, the water is collected in the water tank, the water tank is full of water and has no gas, and due to the incompressibility of water, the water in the water tank has almost no fluctuation, therefore, when the point cooling pipe leaves the water tank, the piston advances, and the water in the water tank gradually flows into the water tank through the side pipe, therefore, by controlling the inflow speed, the water surface in the water tank can be prevented from producing large fluctuations, that is, compared with the prior art, when the point cooling pipe leaves the water surface, the water surface produces large fluctuations, and the subsequent water droplets falling from the point cooling pipe further cause the water surface to fluctuate, and these water surface fluctuations are difficult to be smoothed in a short time, therefore, the air tightness detection of the next point cooling pipe is affected, and the present application can solve this problem; Further, the filter membrane can prevent the water droplets on the point cooling pipe from falling and causing the water surface in the water tank to fluctuate, and when the water returns to the water tank in the form of inflow, a "spring" phenomenon occurs, which also causes the water surface to fluctuate, in the present application, the filter membrane exists and the aperture of the filter membrane increases 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 water surface fluctuation problem caused by the spring phenomenon can be solved, that is, the water surface fluctuation can be further reduced, and the water surface can be smoothed faster; Further, initially, the filter membrane is loose, so that when the water is pumped into the water tank, the filter membrane bends downward under the action of water flow, and in the process of returning the water to the water tank, the filter membrane bends upward under the action of water flow, and the bending action of the filter membrane changes and absorbs part of the flow energy of the water, therefore, the water surface fluctuation can be further reduced.

[0019] Two, another core of the present application is that in the process of plugging the point cooling pipe: 1. The setting of the spring two can ensure that the upper and lower orifices of the mounting hole one remain sealed, and the advantage is that in the subsequent air tightness detection, the gas enters the upper sealing pipe in the mounting hole one through the gas pipe, the connecting channel, the ring groove and the side hole, and finally enters the point cooling pipe, and when the threaded connection end b of the point cooling pipe is sealed, the upper sealing pipe is constantly rotating, and after a long time, the sealing between the mounting hole one and the upper sealing pipe is easily affected by wear, which eventually leads to insufficient gas amount delivered to the point cooling pipe and continuous leakage, thereby affecting the accuracy of the final air tightness detection result, and in the scheme, the sealing of the upper and lower orifices of the mounting hole one is ensured by the setting of the spring two, so the problem does not exist; 2. In the scheme, the threaded shaft one and the spring one are set because the distance between the two threaded connection ends of different models of point cooling pipes is different, so the distance between the mounting hole one and the mounting hole two can be adjusted by the threaded shaft one, but this cannot guarantee the absolute coaxiality between the mounting hole two and the threaded connection end c, and some coaxiality errors are inevitably exist, therefore, the scheme adopts the mode of sealing the threaded connection end b first and then sealing the threaded connection end c, and the advantage is that when the threaded connection end b is sealed, the threaded connection end c collides with the upper sealing pipe in the mounting hole two, at this time, the tester can observe whether the two are aligned, if not, the threaded shaft one can be appropriately screwed to align the two, which ensures the smooth threaded connection between the threaded connection end c and the upper sealing pipe in the mounting hole two. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of a point cooling pipe; Figure 2 is a structural schematic view of the present application Figure 1 ; Figure 3 is a structural schematic view of the present application Figure 2 ; Figure 4 is a schematic view of a sealing mechanism and a detection mechanism Figure 1 ; Figure 5 is a schematic view of a sealing mechanism and a detection mechanism Figure 2 ; Figure 6 is a schematic view of a side sealing assembly; Figure 7 is a schematic view of a rotating frame and an upper sealing assembly; Figure 8 is a sectional view of the upper sealing assembly; Figure 9 is a sectional view of the sealing unit; Figure 10 is a schematic view of a detection mechanism; Figure 11It is a sectional view of the sealing mechanism; Figure 12 It is a schematic view of the water tank and filter membrane.

[0021] The reference signs in the drawings are: 100, rack; 200, sealing mechanism; 201, connecting frame; 202, linear module one; 203, support one; 204, linear module two; 205, support two; 206, rotating frame; 2061, connecting channel; 207, motor one; 208, air supply pipe; 209, sliding seat; 210, spring one; 211, threaded shaft one; 212, upper sealing pipe; 2121, threaded joint; 2122, ring groove; 2123, side hole; 2124, shaft shoulder; 2125, sealing ring; 2126, spring two; 2127, fixing ring; 213, spring three; 214, linear module three; 215, support three; 216, support seat; 217, threaded shaft two; 218, motor two; 219, screw head one; 220, support four; 221, spring four; 222, support five; 223, spring five; 224, motor three; 225, screw head two; 226, side sealing pipe; 227, plug; 228, linear module five; 300, detection mechanism; 301, water tank; 3011, diaphragm; 3012, air-drying port; 3013, bottom hole; 302, camera; 303, air blower; 304, bottom pipe; 3041, one-way valve one; 305, side pipe; 3051, one-way valve two; 306, water tank; 307, piston; 3071, filter element; 3072, drain pipe; 308, linear module four; 309, filter membrane. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0023] Referring to Figure 1 , a schematic view of a point cold pipe to be detected is shown, which is composed of a flange a, a threaded connection end b, a threaded connection end c, an outer cooling water pipe d and an inner cooling water pipe e, which are prior art and will not be described in detail.

[0024] Referring to Figures 1-12 A kind of air-tightness detection device for point cold pipe, including rack 100 and the sealing mechanism 200 and detection mechanism 300 of setting on rack 100.

[0025] I. sealing mechanism 200 Referring to Figures 4-9The blocking mechanism 200 comprises a connecting frame 201 connected with the rack 100, a support one 203, a support three 215, a linear module one 202 for driving the support one 203 to move in the horizontal direction, and a linear module three 214 for driving the support three 215 to move in the horizontal direction are arranged on the connecting frame 201, the moving directions of the support one 203 and the support three 215 are perpendicular to each other, and it should be noted that the linear modules mentioned in the scheme are all existing electric telescopic rod technology or existing screw rod linear movement technology, and the like, which will not be repeated here.

[0026] The support one 203 is provided with a support two 205 and a linear module two 204 for driving the support two 205 to move in the vertical direction.

[0027] The support two 205 is rotatably provided with a rotating frame 206, and a connecting shaft formed at the rotating frame 206 is in power connection with a motor one 207 arranged on the support two 205, and the connecting shaft is parallel to the moving direction of the support three 215.

[0028] The rotating frame 206 is provided with an upper blocking assembly for blocking the threaded connection end b and the threaded connection end c of the point cold pipe to be detected.

[0029] Specifically, referring to Figure 5 The support three 215 is provided with a bracket 216 and a linear module five 228 for driving the bracket 216 to move in the vertical direction.

[0030] Referring to Figures 7-9 The upper end of the bracket 216 is open, one side of the bracket 216 along the moving direction of the support three 215 is open, and the other side is provided with a threaded shaft two 217 in a threaded manner, and the threaded shaft two 217 is parallel to the moving direction of the support three 215; the point cold pipe to be detected can be directly placed on the bracket 216 until the point cold pipe contacts the threaded shaft two 217, and the threaded shaft two 217 plays a positioning role, because the shapes and sizes of different point cold pipes are different, the positioning can be changed by screwing the threaded shaft two 217, and in addition, the threaded connection end of the point cold pipe faces upward.

[0031] The upper blocking assembly comprises a mounting hole one arranged on the upper surface of the rotating frame 206 and a sliding seat 209 arranged on the rotating frame 206 in the moving direction of the support three 215, a spring one 210 is arranged between the sliding seat 209 and the rotating frame 206, the elastic force of the spring one 210 is used to drive the sliding seat 209 away from the mounting hole one, the upper surface of the sliding seat 209 is provided with a mounting hole two, and the rotating frame 206 is further provided with a threaded shaft one 211 in a threaded manner, and by cooperation of the threaded shaft one 211 and the spring one 210, the distance between the mounting hole one and the mounting hole two can be changed.

[0032] Each of the mounting hole one and the mounting hole two is provided with a blocking unit.

[0033] The sealing unit includes an upper sealing tube 212 fitted into mounting hole one or mounting hole two. The upper end of the upper sealing tube 212 is closed and polygonal in shape, and the lower end is open and equipped with a threaded joint 2121. Furthermore, a fixing ring 2127 and a sealing ring 2125 are provided on the outside of the upper sealing tube 212. The sealing ring 2125 is used to seal the upper opening of mounting hole one or mounting hole two. The fixing ring 2127 is located above the sealing ring 2125 and a spring is provided between the two. Spring 2126, the outer side of the upper sealing tube 212 is provided with a shoulder 2124. The upper surface of the shoulder 2124 abuts against the plane where the lower opening of mounting hole 1 or mounting hole 2 is located. Therefore, under the elastic force of spring 2126, the sealing ring 2125 always abuts against the upper opening of mounting hole 1 or mounting hole 2, and the upper surface of the shoulder 2124 always abuts against the lower opening of mounting hole 1 or mounting hole 2. The opening of mounting hole 1 or mounting hole 2 is always sealed.

[0034] besides: The outer surface of the upper sealing tube 212 of the sealing unit in the installation hole is provided with an annular groove 2122. The annular groove 2122 and the inner cavity of the upper sealing tube 212 are connected through a side hole 2123. The rotating frame 206 is provided with a connecting channel 2061 connected by the annular groove 2122. An air supply pipe 208 is provided at the end of the connecting channel 2061. The end of the air supply pipe 208 is connected to equipment such as an air pump.

[0035] The upper sealing tube 212 of the sealing unit in the second mounting hole is provided with an external step located below the shoulder 2124, and a spring 3 213 is provided between the external step and the slide 209.

[0036] Reference Figure 5 and Figure 7 The upper sealing assembly also includes a motor 218 located on the upper end of the bracket 215 and above the support 216. The output end of the motor 218 is provided with a vertically arranged screw head 219. When the cooling pipe is placed on the support 216, the screw head 219 is coaxial with the threaded connection end b of the cooling pipe.

[0037] Therefore, the process of sealing the threaded connection ends b and c of the spot cooling pipe is specifically manifested as follows: Place the cooling tube on the support 216 so that the cooling tube contacts the threaded shaft 211. At this time, the threaded connection end b is coaxial with the screw head 219. Then, the linear module 3 214 drives the bracket 3 215 to move, so that the mounting hole 1 is coaxial with the screwing head 1 219. Then, the linear module 204 drives the bracket 205 to move upward, and the bracket 205 moves the rotating frame 206 upward, so that the upper sealing tube 212 and the screwing head 219 in the mounting hole 1 can be inserted. Then the linear module five 228 drives the bracket 216 to move up, the bracket 216 moves up with the point cold pipe, the motor two 218 drives the screw head one 219 to rotate, the screw head one 219 rotates with the upper sealing pipe 212, the cooperation of the two can make the upper sealing pipe 212 in the mounting hole one and the threaded connection end b of the point cold pipe form threaded connection, during this process, the threaded connection end c of the point cold pipe is in contact with the upper sealing pipe 212 in the mounting hole two, and the spring three 213 is compressed; Then the linear module five 228 drives the bracket 216 to move down, the point cold pipe remains in the current position and is separated from the bracket 216, and the linear module two 204 drives the bracket two 205 to move down to separate the screw head one 219 from the plug-in connection; Then the linear module three 214 drives the bracket three 215 to move to make the mounting hole two coaxial with the screw head one 219; Then the linear module two 204 drives the bracket two 205 to move up to complete the plug-in connection of the upper sealing pipe 212 in the mounting hole two and the screw head one 219; Then the motor two 218 drives the screw head one 219 to rotate, and the upper sealing pipe 212 in the mounting hole two rotates while moving down to complete the threaded connection with the threaded connection end c of the point cold pipe, it should be noted that since the upper end of the upper sealing pipe 212 is polygonal and has a certain distance, therefore, after the threaded connection is completed, the upper sealing pipe 212 in the mounting hole two and the screw head one 219 still remain in plug-in connection.

[0038] From the above description, it can be known that: 1、The spring two 2126 is arranged to ensure that the upper and lower openings of the mounting hole one remain sealed, and the advantage is that in the subsequent air tightness detection, the gas enters the upper sealing pipe 212 in the mounting hole one through the gas supply pipe 208, the connecting channel 2061, the annular groove 2122 and the side hole 2123, and finally enters the point cold pipe, and when the threaded connection end b of the point cold pipe is sealed, the upper sealing pipe 212 is constantly rotating, and after a long time, the sealing between the mounting hole one and the upper sealing pipe 212 is easily affected by wear, which finally leads to insufficient gas amount delivered to the point cold pipe and continuous leakage, thereby affecting the accuracy of the final air tightness detection result, and in the present scheme, since the spring two 2126 is arranged to ensure the sealing of the upper and lower openings of the mounting hole one, this problem does not exist; 2. In this solution, the threaded shaft 211 and spring 210 are set up because the distance between the two threaded connection ends of different models of cooling pipes is different. Therefore, the distance between mounting hole 1 and mounting hole 2 can be adjusted by threaded shaft 211. However, this cannot guarantee the absolute coaxiality between mounting hole 2 and threaded connection end c, and some coaxiality error is inevitable. Therefore, this solution adopts the method of sealing threaded connection end b first and then sealing threaded connection end c. The advantage is that when sealing threaded connection end b, threaded connection end c and upper sealing tube 212 in mounting hole 2 are in contact. At this time, the tester can observe whether the two are aligned. If they are not aligned, threaded shaft 211 can be turned appropriately to align them. In this way, the subsequent threaded connection between threaded connection end c and upper sealing tube 212 in mounting hole 2 is guaranteed to proceed smoothly.

[0039] Reference Figure 4 and Figure 5 The connecting frame 201 is also equipped with a side sealing assembly on the side of the threaded connection end c of the cooling pipe located on the support 216 away from the threaded connection end b, which is used to seal the ends of the outer cooling water pipe d and the inner cooling water pipe e of the cooling pipe.

[0040] Specifically, refer to Figures 4-6 The side sealing assembly includes a bracket 220 that is slidably mounted on the connecting frame 201 along the moving direction of the bracket 215, and a spring 221 is provided on the side of the bracket 220 facing the support 216.

[0041] A bracket five 222 is slidably mounted on the upper part of bracket four 220 along the vertical direction, and a spring five 223 is mounted below bracket five 222.

[0042] The bracket 222 is equipped with a motor 224. The output end of the motor 224 is equipped with a screw head 225. A plug 227 is coaxially inserted into the screw head 225. The end of the plug 227 extends out of the screw head 225 and is coaxially equipped with a side sealing tube 226.

[0043] When the cooling pipe is placed on the support 216, the side sealing pipe 226 is parallel to the cooling pipe and the axis of both is in the same vertical plane.

[0044] After sealing the threaded connection ends b and c of the cooling pipe, the tester manually moves bracket 4 220 and bracket 5 222, so that the inner cooling water pipe e of the cooling pipe is inserted into the side sealing pipe 226, and the end of the outer cooling water pipe d abuts against the side sealing pipe 226. Then, motor 3 224 drives the screw head 2 225 to rotate, thereby rotating the side sealing pipe 226, thus realizing the threaded connection between the side sealing pipe 226 and the outer cooling water pipe d. After that, the tester releases his hands, spring 4 221 releases its elastic force, and plug 227 disengages from screw head 2 225. At this point, the completion of the point of the threaded connection end b, threaded connection end c, outer cooling water pipe d and the inner cooling water pipe e plugging.

[0045] II. Detection mechanism 300 Referring to Figure 2 With Figure 3 , detection mechanism 300 is located on one side of the sealing mechanism 200.

[0046] Referring to Figure 10 With Figure 11 , detection mechanism 300 includes a water tank 301, when the point of the cold pipe is completed by the sealing mechanism 200 sealing, the point of the cold pipe is connected with the bracket 203 of the sealing mechanism 200, therefore, through the linear module 202 can be pulled to the point of the cold pipe above the water tank 301, and then through the linear module 202 can be pulled to the point of the cold pipe into the water tank 301.

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

[0048] The one-way valve 3041 is used for one-way flow of water in the bottom pipe 304 into the water tank 306, and the one-way valve 3051 is used for one-way flow of water in the water tank 306 into the side pipe 305. The one-way valve technology is prior art and is not described here.

[0049] The water tank 306 is provided with a piston 307, which is driven by a linear module 308 and moves in the water tank 306.

[0050] The side of the water tank 301 is provided with a notch, and the notch is provided with a diaphragm 3011. The diaphragm 3011 is made of soft and elastic material, also known as diaphragm, which can well absorb the energy of vibration impact and play a buffering role.

[0051] Preferably, the side of the water tank 301 is provided with a drying port 3012, and the drying port 3012 is provided with a fan 303, which is used for drying the point of the cold pipe when it leaves the water tank 301.

[0052] The upper side of the water tank 301 is provided with a camera 302.

[0053] Preferably, the bottom of the water tank 306 is provided with a drain pipe 3072, and the drain pipe 3072 is provided with a solenoid valve, which is used for discharging dirty water when the water is dirty.

[0054] Preferably, the water tank 306 is provided with a filter core 3071 close to the one-way valve two 3051.

[0055] Further, referring to Figure 12 The water tank 301 is provided with a filter membrane 309 close to the bottom of the tank. The filter membrane 309 is a prior art and is not described here. The pore size of the filter membrane 309 increases from the center to the periphery, that is, the closer to the center, the smaller the pore size, and the closer to the side, the larger the pore size.

[0056] The working process of the detection mechanism 300 is as follows: After the cold pipe at the traction point enters the water tank 301, gas is injected into the cold pipe, and at the same time, the motor one 207 drives the rotating frame 206 to rotate, and the rotating frame 206 slowly rotates with the cold pipe for one revolution, and cooperates with the camera 302 to realize the air tightness detection; During the above water entering and detection process, the ripples on the water surface are relatively light due to the slow speed, and the buffer of the diaphragm sheet 3011 further reduces the ripples on the water surface, so that the camera 302 can clearly capture the situation around the cold pipe under the water; 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. The advantage is that: on the one hand, when the cold pipe after the traction completes the detection leaves, the water on the cold pipe falls on the filter membrane 309, and the filter membrane 309 plays a buffering role, so as not to cause a large fluctuation of the water surface in the water tank 301; on the other hand, the water is collected in the water tank 306, which is full of water and has no gas, and due to the incompressibility of water, the fluctuation of the water in the water tank 306 is approximately zero; After the cold pipe leaves the water tank 301, the piston 307 advances, and the water in the water tank 306 gradually flows into the water tank 301 through the side pipe 305, so that the inflow speed is controlled to avoid a large fluctuation of the water surface in the water tank 301. That is, compared with the prior art, directly pulling the cold pipe out of the water tank 301, the cold pipe leaves the water surface at a moment, which causes a large fluctuation of the water surface, and the subsequent water droplets falling from the cold pipe further cause the water surface to fluctuate. Large, and these water surface fluctuations are difficult to recover in a short time, so as to affect the air tightness detection of the next cold pipe. In contrast, the present scheme can avoid a large fluctuation of the water surface, that is, it can solve this problem, in addition to: The presence of the filter membrane 309 can prevent water droplets on the point cooling pipe from falling and causing water surface fluctuation in the water tank 301. When water is returned to the water tank 301 in the form of a surge, a "surge" phenomenon occurs, which also causes water surface fluctuation. In the present solution, the filter membrane 309 is present and the pore size of the filter membrane 309 increases 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, thereby solving the water surface fluctuation problem caused by the surge phenomenon, i.e., further reducing water surface fluctuation and making the water surface recover faster. Further, as shown in the first drawing of Figure 12 , initially, the filter membrane 309 is taut, and the above effect exists. Further, as shown in the second drawing and the third drawing of Figure 12 , initially, the filter membrane 309 is loose. When water is pumped into the water tank 306, the filter membrane 309 bends downward under the action of water flow, as shown in the second drawing. Figure 12 During the process of returning water to the water tank 301 again, the filter membrane 309 bends upward under the action of water flow, and the bending action of the filter membrane 309 changes to absorb part of the flow energy of the water, thereby further reducing water surface fluctuation.

[0057] It should be noted that the present solution can replace manual detection of the point cooling pipe to realize batch and continuous automatic detection of the point cooling pipe. The high-precision camera and intelligent algorithm are combined to determine the bubble leakage defect, ensure the safety and stability of the detection process, and record data production archive records. That is, AI visual detection is used to assist in improving detection quality and efficiency. If a bubble is detected, it is unqualified, and a red light alarm and detection stop. If no bubble is detected, it is qualified, and a green light passes. The specific detection algorithm logic program is not the main body of the present solution, and will not be described here. For example, PLC programming can be used for control.

[0058] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with reference to the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application to obtain equivalent embodiments with equivalent changes. Any modification, change, and modification of the above embodiments based on the technical essence of the present application are still within the scope of the present application.

Claims

1. A kind of point cold tube airtightness detection device, including rack (100), the sealing mechanism (200) and detection mechanism (300) are provided on rack (100), it is characterized in that, The detection mechanism (300) comprises a water tank (301), the bottom of the water tank (301) is in the shape of a trapezoid with the horizontal section decreasing from top to bottom, and the bottom of the water tank (301) is provided with a bottom hole (3013), the hole of the bottom hole (3013) is provided with a bottom pipe (304), the lower end of the bottom pipe (304) is provided with a water tank (306), and the connection between the two is provided with a one-way valve one (3041), one side of the bottom pipe (304) is provided with a side pipe (305), the end of the side pipe (305) is connected with the water tank (306), and the connection between the two is provided with a one-way valve two (3051), the one-way valve one (3041) is used for allowing the water in the bottom pipe (304) to flow into the water tank (306) in one direction, and the one-way valve two (3051) is used for allowing the water in the water tank (306) to flow into the side pipe (305) in one direction; The water tank (306) is provided with a piston (307), the side of the water tank (301) is provided with a notch, the notch is provided with a diaphragm (3011), the upper side of the water tank (301) is provided with a camera (302), and the water tank (301) is provided with a filter membrane (309) close to the bottom.

2. The hermeticity testing device for a cold cathode tube according to claim 1, wherein The plugging mechanism (200) comprises a connecting frame (201) connected with the rack (100), the connecting frame (201) is provided with a support one (203), a support three (215), a linear module one (202) for driving the support one (203) to move in the horizontal direction, and a linear module three (214) for driving the support three (215) to move in the horizontal direction, and the moving directions of the support one (203) and the support three (215) are perpendicular to each other; The support one (203) is provided with a support two (205) and a linear module two (204) for driving the support two (205) to move in the vertical direction, the support two (205) is provided with a rotating frame (206), the rotating frame (206) is provided with an upper plugging assembly for plugging the threaded connection end b and the threaded connection end c of the point cold pipe to be detected, and the connecting frame (201) is provided with 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.

3. The hermeticity testing device for a cold cathode tube according to claim 2, wherein The rotating frame (206) is rotationally connected with the support two (205), the connecting shaft formed by the rotationally connected part is in power connection with a motor one (207) arranged on the support two (205), and the connecting shaft is parallel to the moving direction of the support three (215).

4. The hermeticity testing device for a cold cathode tube according to claim 2, wherein The support three (215) is provided with a support two (205) and a linear module two (204) for driving the support two (205) to move in the vertical direction, the support two (205) is provided with a rotating frame (206), the rotating frame (206) is provided with an upper plugging assembly for plugging the threaded connection end b and the threaded connection end c of the point cold pipe to be detected, and the connecting frame (201) is provided with 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. The rotating frame (206) is rotationally connected with the support two (205), the connecting shaft formed by the rotationally connected part is in power connection with a motor one (207) arranged on the support two (205), and the connecting shaft is parallel to the moving direction of the support three (215).

5. The hermeticity testing device for a cold cathode tube according to claim 4, wherein The support three (215) is provided with a support two (205) and a linear module two (204) for driving the support two (205) to move in the vertical direction, the support two (205) is provided with a rotating frame (206), the rotating frame (206) is provided with an upper plugging assembly for plugging the threaded connection end b and the threaded connection end c of the point cold pipe to be detected, and the connecting frame (201) is provided with 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. The spring one (210) is arranged between the sliding seat (209) and the rotating frame (206), and the spring one (210) drives the sliding seat (209) to move away from the mounting hole one by elastic force.

6. The hermeticity testing device for a cold cathode tube according to claim 4, wherein The plugging unit comprises an upper plugging pipe (212) arranged in the mounting hole one or the mounting hole two, wherein the upper end of the upper plugging pipe (212) is closed and arranged in a polygonal shape, the lower end of the upper plugging pipe (212) is open and arranged with a threaded joint (2121), the outer part of the upper plugging pipe (212) is arranged with a fixing ring (2127) and a sealing ring (2125), the sealing ring (2125) is used for plugging the upper hole of the mounting hole one or the mounting hole two, the fixing ring (2127) is arranged above the sealing ring (2125) and the spring two (2126) is arranged between the fixing ring (2127) and the sealing ring (2125), and the outer part of the upper plugging pipe (212) is arranged with an axial shoulder (2124), and the upper surface of the axial shoulder (2124) is in abutment with the plane where the lower hole of the mounting hole one or the mounting hole two is located.

7. The hermeticity testing device for a cold cathode tube according to claim 6, wherein The outer circular surface of the upper plugging pipe (212) in the mounting hole one is arranged with a ring groove (2122), the ring groove (2122) is in communication with the inner cavity of the upper plugging pipe (212) through a side hole (2123), the rotating frame (206) is arranged with a connecting channel (2061) in communication with the ring groove (2122), and the tail end of the connecting channel (2061) is arranged with a gas feeding pipe (208). The outer part of the upper plugging pipe (212) in the mounting hole two is arranged with an external step below the axial shoulder (2124), and the spring three (213) is arranged between the external step and the sliding seat (209).

8. The hermeticity testing device for a cold cathode tube according to claim 7, wherein The upper plugging assembly further comprises a motor two (218) arranged on the upper end of the support three (215) and located above the support seat (216), the output end of the motor two (218) is arranged with a vertical screw head one (219), and when the point cooling pipe is placed on the support seat (216), the screw head one (219) is coaxial with the threaded connection end b of the point cooling pipe.

9. The hermeticity testing device for a cold cathode tube according to claim 8, wherein The side plugging assembly comprises a support four (220) arranged on the connecting frame (201) and sliding in the moving direction of the support three (215), and the side of the support four (220) facing the support seat (216) is arranged with a spring four (221), the support four (220) is arranged with a support five (222) sliding in the vertical direction, and the lower part of the support five (222) is arranged with a spring five (223). The support five (222) is arranged with a motor three (224), the output end of the motor three (224) is arranged with a screw head two (225), the screw head two (225) is coaxially inserted with a plug (227), the tail end of the plug (227) extends out of the screw head two (225) and is coaxially arranged with a side plugging pipe (226), and when the point cooling pipe is placed on the support seat (216), the side plugging pipe (226) is parallel to the point cooling pipe and the axial lines of the two are located in the same vertical plane.

10. A method of using a leak detector for a point-of-use cold pipe as defined in claim 7 or 9, wherein The method comprises the following steps: Step one: the plugging mechanism (200) is used to block the threaded connection end b, threaded connection end c and outer cooling water pipe d of the point cooling pipe, and the outer cooling water pipe d of the point cooling pipe is communicated with the inner cooling water pipe e; Step two: the point cooling pipe is pulled into the water tank (301), and the gas enters the point cooling pipe through the gas feeding pipe (208), the connecting channel (2061), the ring groove (2122), the side hole (2123) and the upper plugging pipe (212) in the mounting hole one, so that the point cooling pipe is kept in a positive pressure state, and the air tightness of the point cooling pipe is detected in cooperation with the camera (302); Step three: after the detection is completed, the piston (307) retreats, the water in the water tank (301) falls into the water tank (306) through the bottom pipe (304), and the water surface in the water tank (301) is lower than the filter membrane (309); Step four: after the point cooling pipe leaves the water tank (301), the piston (307) advances, and the water in the water tank (306) gradually flows into the water tank (301) through the side pipe (305).

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