Device for detecting water permeability after production of plastic valve

Abstract

The invention belongs to the technical field of valve detection, and discloses a water permeability detection device after plastic valve production, which comprises a lead screw driving module arranged on one side of a workbench through a mounting frame and parallel to a main beam, the lead screw driving module is used for driving detection modules to carry out water permeability detection on a valve, the detection modules are arranged on both sides of a detection station, and the lead screw driving module is used for driving the detection modules to carry out water permeability detection on the valve. A water tank is further arranged on the mounting frame; the detection module comprises a water injection pipe, and a flange on the water injection pipe is in butt joint with a flange on one side of the valve and injects water into the water injection pipe; the water distribution pipe is used for communicating the water tank and the water injection pipe to form a communicating vessel structure. The detection module is controlled by the lead screw driving module to clamp the valve, water is injected into the valve and pressurization is carried out by utilizing a communicating vessel structure, and the water seepage performance and water seepage points of the valve are detected through cooperation of the pressure meter and the humidity monitor. Automatic feeding and discharging detection is achieved in the whole process. And through a standard unified detection process, the detection accuracy and efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of valve detection, in particular to a device for detecting water permeability of a plastic valve after production. Background Art

[0002] Plastic valves are commonly used in daily life and industrial production to pass and stop water flow. After production, they need to be sampled to test their yield rate. The most important test item is the water permeability test, which directly affects the practicality and quality of the valve.

[0003] Usually, valve testing is done by injecting water into the valve to increase pressure and observing changes in the pressure gauge. If the pressure changes normally, the valve is qualified, otherwise it is NG. Currently, when testing valves, most production lines require manual loading and installation, placing the valve in the test pool, installing it, and injecting water, and then observing changes in pressure. This testing method is cumbersome, and the tightness of the installation is difficult to control, which will also affect the accuracy and efficiency of the valve test results.

[0004] This application designs an automated testing production line for plastic valves, using a unified standard to perform water seepage inspection on finished plastic valves, capturing water seepage points and improving the quality and speed of inspection. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a water permeability detection device for plastic valves after production.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for detecting water seepage of plastic valves after production is completed, the device for detecting water seepage of plastic valves after production is completed comprises a linear motor and a main beam, the main beam is slidably mounted with a fixture connected to the linear motor drive, the plastic valve is mounted on the fixture and moves to the detection station accordingly, and also comprises a lead screw driving module arranged on one side of the workbench and parallel to the main beam through a mounting frame, which is used to drive the detection module to perform water seepage detection on the valve, the detection module is arranged on both sides of the detection station, and a water tank is also arranged on the mounting frame; The detection module includes a water injection pipe, a flange on which is connected to a flange on one side of the valve and water is injected into the pipe; a water distribution pipe, which is used to connect the water tank and the water injection pipe to form a communicating vessel structure; a humidity monitor, which is arranged below the connection between the flange and the valve flange to detect water seepage; and a drain pipe, which is arranged on the water injection pipe of the detection module on one side to drain water after the detection is completed.

[0007] Preferably, the communicating vessel structure includes a solenoid valve disposed at the bottom of the water tank and connected to the water distribution pipes on the two detection modules respectively. The interior of the water tank includes two isolation chambers respectively connected to the external environment, and the two isolation chambers are respectively connected to the solenoid valve.

[0008] Preferably, the detection module also includes an elastic telescopic rod, a cantilever installed on the telescopic end of the elastic telescopic rod, a mounting plate installed on the end of the sleeve of the elastic telescopic rod and a humidity monitor installed on the cantilever, the cantilever is provided with a guide rod movably sleeved on the mounting plate for guiding purposes, the humidity monitor is fixedly mounted on the bottom of the mounting plate, and the wind knife is used to blow dry the retracted humidity monitor probe.

[0009] Preferably, one end of the detection module is connected to a water injection sleeve, and the other end of the water injection sleeve is provided with a cylinder, and the output end of the cylinder is connected to a piston that is interference-fitted with the inner wall of the water injection sleeve to pressurize the water distribution pipe; The water injection pipe is also provided with a pressure gauge.

[0010] Preferably, the screw drive module is composed of a bidirectional ball screw, and the two detection modules located at the detection station are respectively arranged at both ends of the bidirectional ball screw for being controlled to open and close.

[0011] Preferably, the mounting plate is arranged in the middle of the detection station, and includes a motor, a pulley and a chuck. The motor drives the pulley mechanism to rotate in the same direction, the pulley is rotatably connected to the chuck, and the chuck is engaged with the handle on the plastic valve for opening or closing the plastic valve.

[0012] Preferably, a supporting cylinder is provided below the detection station on the workbench, and the supporting cylinder is used to lift the fixture upward to the detection station.

[0013] Preferably, the fixture includes a base slidably mounted on the main beam, a bracket spliced ​​and mounted on the base, an arc rail fixed on the bracket and two cross bars slidably mounted on the arc rail, studs are used to adjust the width between the two cross bars, and both cross bars are provided with blocks for supporting the flanges on both sides of the plastic valve.

[0014] Preferably, a dovetail groove is provided in the middle of the arc rail, and the cross bar is slidably installed in the dovetail groove. The position of the cross bar relative to the arc rail can be fixed by a locking bolt.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention controls the detection module to clamp the valve through the screw drive module, injects water and pressurizes it using the communicating vessel configuration, and cooperates with the pressure gauge and humidity monitor to detect the water seepage performance and water seepage point of the valve. The whole process realizes automatic loading and unloading detection, and the manual operation only needs to place the valve on the fixture, or this process can also be realized by the existing automatic loading machine. Through the standardized and unified detection process, the detection accuracy and efficiency are improved.

[0016] The present invention is engaged by a wedge block under the chuck. The pulley rotation mechanism composed of a motor and a pulley can drive the chuck to rotate the handle of the plastic valve, thereby controlling the valve ball switch therein to conduct or cut off the water flow therein. The cylinder is then pressurized again to test the airtightness of the valve plate or valve ball of the plastic valve. Pressure detection is performed by a pressure gauge arranged on the detection module. When the valve ball leaks water to the other side, the pressure fluctuation in the valve body cavity fluctuates, and thus it is detected that the valve plate of the reorganized valve has poor airtightness and is an NG product. Through the above scheme, the airtightness detection of the valve body flange and the valve core can be achieved at the same workstation, with strong functionality and a high degree of integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A magnified schematic diagram of part A; Figure 3 It is a top view schematic diagram of the present invention; Figure 4 It is a partial front view of the present invention; Figure 5 It is a schematic diagram of the jig of the present invention moving to the unloading station; Figure 6 It is a schematic diagram of the structure of the fixture of the present invention.

[0018] In the figure: 100, linear motor; 200, main beam; 300, screw drive module; 401, elastic telescopic rod; 402, cantilever; 403, mounting plate; 4031, guide rod; 404, water injection pipe; 4041, flange; 4042, drain pipe; 405, water distribution pipe; 406, pressure gauge; 407, cylinder; 408, humidity monitor; 409, wind knife; 410, water injection sleeve; 500, water tank; 501, solenoid valve; 601, motor; 602, pulley; 603, chuck; 700, top support cylinder; 800, fixture; 801, base; 802, bracket; 803, curved rail; 804, cross bar; 805, stud; 806, frame block; 807, dovetail groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 6As shown, the present invention provides a device for detecting water seepage of plastic valves after production is completed, and the device for detecting water seepage of plastic valves after production is completed comprises a linear motor 100 and a main beam 200, wherein the main beam 200 is slidably mounted with a fixture 800 connected to the linear motor 100, and the plastic valve is mounted on the fixture 800 and moves to the detection station accordingly, and further comprises a lead screw driving module 300 which is arranged on one side of the workbench and parallel to the main beam 200 through a mounting frame, and is used to drive a detection module to perform water seepage detection on the valve, and the detection module is arranged on both sides of the detection station, and a water tank 500 is also arranged on the mounting frame; The detection module includes a water injection pipe 404, a flange 4041 on the water injection pipe 404 is connected to the flange on one side of the valve and water is injected into it; a water distribution pipe 405, the water distribution pipe 405 is used to connect the water tank 500 and the water injection pipe 404 to form a communicating vessel structure; a humidity monitor 408, the humidity monitor 408 is arranged below the connection between the flange 4041 and the valve flange to detect water seepage; a drain pipe 4042, which is arranged on the water injection pipe 404 of the detection module on one side to drain water after the detection is completed.

[0021] The fixture 800 carries the plastic valve and moves to the inspection station. The screw drive module 300 drives the inspection module to approach the valve and perform the water injection and pressurization process. The flange on the water injection pipe 404 is docked with the flange on the plastic valve. The humidity monitor 408 is set below to detect the water leakage of the flange and confirm the water leakage point. After the test, the water is drained through the drain pipe 4042, the inspection module is opened, and the fixture 800 carries the valve to the unloading station to remove the valve.

[0022] like Figure 1 and Figure 2 As shown, the communicating vessel structure includes a solenoid valve 501 disposed at the bottom of the water tank 500 and connected to the water distribution pipes 405 on the two detection modules respectively. The interior of the water tank 500 includes two isolation chambers respectively connected to the external environment, and the two isolation chambers are respectively connected to the solenoid valve 501.

[0023] The inner cavity of the water tank 500 is set in an isolated state, and the electromagnetic valve 501, the water distribution pipe 405, the water injection pipe 404 and the valve body are connected to form a communicating vessel, which can quickly discharge the gas therein to fill the water body. The tightness of the valve is then tested by closing the electromagnetic valve 501 and then pressurizing it.

[0024] like Figure 1 and Figure 2As shown, the detection module also includes an elastic telescopic rod 401, a cantilever 402 installed on the telescopic end of the elastic telescopic rod 401, a mounting plate 403 installed on the sleeve end of the elastic telescopic rod 401 and a humidity monitor 408 installed on the cantilever 402, a guide rod 4031 is provided on the cantilever 402 and is movably mounted on the mounting plate 403 for guiding purposes, the humidity monitor 408 is fixedly mounted on the bottom of the mounting plate 403, and the wind knife 409 is used to blow dry the retracted humidity monitor 408 probe.

[0025] The mounting plate 403 and the guide rod 4031 cooperate to guide and avoid deflection. The humidity monitor 408 is mounted on the mounting plate 403 and moves forward and backward with it. When the elastic telescopic rod 401 supports the water injection pipe 404 and presses it on the valve flange, the elastic telescopic rod 401 contracts, and the humidity monitor 408 moves forward until it extends to the bottom of the flange 4041. It is used to detect water leakage at the flange. After the humidity monitor 408 is recovered after the detection, its probe moves back to the bottom of the wind knife 409, and the wind knife 409 blows dry gas on its probe to quickly dry any moisture on it to avoid affecting the next set of detections.

[0026] like Figure 1 and Figure 2 As shown, one end of one of the detection modules is connected to a water injection sleeve 410, and the other end of the water injection sleeve 410 is provided with a cylinder 407, and the output end of the cylinder 407 is connected to a piston that is interference-fitted with the inner wall of the water injection sleeve 410 to pressurize the water distribution pipe 405; A pressure gauge 406 is also provided on the water injection pipe 404 .

[0027] The cylinder 407 and the water injection sleeve 410 cooperate to form a pressurizing module. When the valve body is filled with water, the solenoid valves 501 on both sides are closed to cut off the water path, and then the cylinder 407 is used to pressurize the water injection sleeve 410, and the pressure in the valve body is detected by the pressure gauge 406. The water injection sleeve 410 is a water cylinder, and a piston with an interference fit with the inner wall of the water cylinder is arranged inside. The piston is connected to the output end of the cylinder 407. When the cylinder 407 is extended, it will push the piston to pressurize the water in the water distribution pipe 405 and even the valve body, so that the pressure therein reaches the rated detection standard. The humidity monitor 408 then detects whether there is water seepage at the flange below.

[0028] like Figure 1 As shown, the screw drive module 300 is composed of a bidirectional ball screw, and the two detection modules located at the detection station are respectively arranged at both ends of the bidirectional ball screw for being controlled to open and close.

[0029] In the initial state, when the plastic valve is in the position to be inspected, the ball screw controls the two inspection modules to open to receive the plastic valve. When the valve reaches the inspection position, the screw drive module 300 drives the two inspection modules to close inward synchronously, thereby clamping the plastic valve and splicing the flange on the water injection pipe 404 with the flange on the valve. The elastic telescopic rod 401 is an elastic telescopic structure, in which a piezoelectric sensor is provided to detect whether the docking pressure meets the requirements.

[0030] like Figure 3 and Figure 4 As shown, 600 is arranged in the middle of the inspection station through a mounting plate, and 600 includes a motor 601, a pulley 602 and a chuck 603. The motor 601 drives the pulley mechanism to rotate in the same direction, the pulley 602 is rotationally connected to the chuck 603, and the chuck 603 is engaged with the handle on the plastic valve for opening or closing the plastic valve.

[0031] When the plastic valve arrives at the inspection station, the rotating handle on it engages with the wedge block below the chuck 603. The pulley rotating mechanism composed of the motor 601 and the pulley 602 can drive the chuck 603 to rotate the handle of the plastic valve, thereby controlling the valve ball switch therein, and conducting or cutting off the water flow therein. In the initial state, the valve is in a conducting state, so a connecting connecting vessel structure with both sides connected can be formed to fill it with water. After the cylinder 407 is pressurized to complete the water permeability test of the flanges on both sides of the valve, the chuck 603 rotates and drives the handle to close the valve ball in the valve, so that it is in a cut-off state. Then the drain pipe 4042 drains the water on one side of the valve. The cylinder 407 is then pressurized again to test the sealing performance of the valve plate or valve ball of the plastic valve. Pressure detection is performed through the pressure gauge 406 set on the detection module. When the valve ball leaks water to the other side, the pressure fluctuation in the valve body cavity fluctuates, so it is detected that the valve plate of the reorganized valve has poor sealing performance and is an NG product.

[0032] In this application, the detection of plastic valve cores is carried out in groups of two. When one of the valves in a group has a problem of poor core tightness, the other valve assembled in the same batch is also judged as NG, and the other valves in the previous and next batches need to be fully inspected again, and the same batch elimination system is implemented to strictly control the quality. People in the relevant field may not adopt this method, and then make adaptive adjustments to the scheme disclosed in this application, that is, instead of using a parallel detection method for the two valves in the same group, a separate connecting structure is designed or the detection channel is effectively isolated, and targeted detection of the valves is adopted.

[0033] The above plans can be adjusted according to actual conditions, and no application is made here as the only limitation.

[0034] like Figure 4 and Figure 5 As shown, a supporting cylinder 700 is provided below the detection station on the workbench, and the supporting cylinder 700 is used to lift the fixture 800 upward to the detection station.

[0035] The supporting cylinder 700 is set just below the middle of the inspection station and below the moving track of the fixture 800. When the fixture 800 moves to the bottom of the inspection station, its position is obtained by the photoelectric detection device, and the main control system stops its further movement. At this time, the fixture 800 is located just above the supporting cylinder 700, and the output end of the supporting cylinder 700 supports upward to push the fixture 800 to the inspection position. Then the inspection module can detect the water permeability of the plastic valve.

[0036] like Figure 6 As shown, the fixture 800 includes a base 801 slidably mounted on the main beam 200, a bracket 802 spliced ​​and mounted on the base 801, an arc rail 803 fixed on the bracket 802 and two cross bars 804 slidably mounted on the arc rail 803, a stud 805 is used to adjust the width between the two cross bars 804, and both cross bars 804 are provided with a frame block 806 for supporting the flanges on both sides of the plastic valve.

[0037] This jig is specially designed for plastic valve inspection. Unlike traditional jigs, the jig disclosed in this application does not need to be replaced according to the inspection of different types of valves, but has universal applicability. The base 801 and the remaining components such as the bracket 802 can be separated, and the bracket 802 can be snap-fitted and installed on the base 801, and the base 801 drives it and the plastic valve to move along the conveying direction. When moved to the inspection station, the supporting cylinder 700 located below the inspection station supports upward, and the bracket 802 and the plastic valve supported thereon are lifted to the inspection position.

[0038] The crossbar 804 can slide linearly along the arc rail 803 through the dovetail groove on the arc rail 803, and the two crossbars 804 can adjust the corresponding spacing according to the different lengths of the plastic valves. A frame block 806 is provided on the crossbar 804, and the frame block 806 is used to support the outer periphery of the plastic valve flange. The two frame blocks 806 are also designed to adapt to different plastic valve flanges. Therefore, the fixture can generally adapt to various types of plastic valves. Even if different types of valves are mixed for inspection during use, there is no need to directly replace the entire set of modules. Instead, the corresponding adjustments can be made and the fixture can be immediately put into use, saving assembly time and speeding up work efficiency.

[0039] like Figure 6 As shown, a dovetail groove 807 is provided in the middle of the arc rail 803 , and the cross bar 804 is slidably installed in the dovetail groove 807 . The position of the cross bar 804 relative to the arc rail 803 can be fixed by locking bolts.

[0040] The distance between the two cross bars 804 can be adjusted by the studs 805, so as to adapt to the distance between different plastic valve flanges, so that different plastic valves can be installed on the fixture. After the distance between the cross bars 804 is adjusted, the top support can be locked on the arc rail 803 by nuts to fix its position and prevent it from moving. In this way, it can continuously provide an installation position for the plastic valve.

[0041] The working principle and use process of the present invention: The fixture 800 carries the plastic valve to the inspection station, and the screw drive module 300 drives the inspection module to approach the valve and perform the water injection and pressurization process. The flange on the water injection pipe 404 is docked and spliced ​​with the flange on the plastic valve, and the humidity monitor 408 is set below to detect the water seepage of the flange to confirm the water seepage point. After the flanges on both sides are inspected, the pulley rotation mechanism composed of the motor 601 and the pulley 602 can drive the chuck 603 to rotate the handle of the plastic valve, thereby controlling the valve ball switch therein to conduct or cut off the water flow therein. In the initial state, the valve is in a conducting state, so a connecting and communicating vessel structure with both sides connected can be formed to fill it with water. The cylinder 407 is then pressurized again to check the sealing performance of the valve plate or valve ball of the plastic valve. Pressure detection is performed through the pressure gauge 406 set on the inspection module. After the inspection is completed, the water in it is emptied through the drain pipe 4042, the inspection module is opened, and the fixture 800 carries the valve to the unloading station to remove the valve.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting water permeability of plastic valves after production, comprising a linear motor (100) and a main beam (200), wherein the main beam (200) is slidably mounted with a fixture (800) that is drive-connected to the linear motor (100), and the plastic valve is mounted on the fixture (800) and moves to a detection station accordingly, wherein: It also includes a screw drive module (300) arranged on one side of the workbench and parallel to the main beam (200) via a mounting frame, and used to drive a detection module to perform water seepage detection on the valve, wherein the detection module is arranged on both sides of the detection station, and a water tank (500) is also arranged on the mounting frame; The detection module comprises a water injection pipe (404), wherein a flange (4041) on the water injection pipe (404) is butted against a flange on one side of the valve and water is injected therein; a water distribution pipe (405), wherein the water distribution pipe (405) is used to connect the water tank (500) and the water injection pipe (404) to form a communicating vessel structure; a humidity monitor (408), wherein the humidity monitor (408) is arranged below the connection between the flange (4041) and the valve flange and is used to detect water seepage; and a drainage pipe (4042), which is arranged on the water injection pipe (404) of the detection module on one side and is used to drain water after the detection is completed.

2. The device for detecting water permeability of plastic valves after production according to claim 1, characterized in that: The communicating vessel structure comprises a solenoid valve (501) disposed at the bottom of the water tank (500) and connected to the water distribution pipes (405) on the two detection modules respectively; the interior of the water tank (500) comprises two isolation chambers respectively connected to the external environment; the two isolation chambers are respectively connected to the solenoid valve (501).

3. The device for detecting water permeability of plastic valves after production according to claim 2, characterized in that: The detection module also includes an elastic telescopic rod (401), a cantilever (402) mounted on the telescopic end of the elastic telescopic rod (401), a mounting plate (403) mounted on the sleeve end of the elastic telescopic rod (401), and a humidity monitor (408) mounted on the cantilever (402); the cantilever (402) is provided with a guide rod (4031) movably sleeved on the mounting plate (403) for guiding purposes; the humidity monitor (408) is fixedly mounted on the bottom of the mounting plate (403); and the air knife (409) is used to dry the retracted probe of the humidity monitor (408).

4. The device for detecting water permeability of plastic valves after production according to claim 3, characterized in that: One end of the detection module is connected to a water injection sleeve (410) and is installed thereon. The other end of the water injection sleeve (410) is provided with a cylinder (407). The output end of the cylinder (407) is connected to a piston which is interference-fitted with the inner wall of the water injection sleeve (410) to pressurize the water distribution pipe (405). The water injection pipe (404) is also provided with a pressure gauge (406).

5. The device for detecting water permeability of a plastic valve after production according to any one of claims 1 to 4, characterized in that: The screw drive module (300) is composed of a bidirectional ball screw, and two detection modules located at the detection station are respectively arranged at both ends of the bidirectional ball screw for being controlled to open and close.

6. The device for detecting water permeability of a plastic valve after production according to any one of claims 1 to 4, characterized in that: The (600) is arranged in the middle of the inspection station through a mounting plate. The (600) comprises a motor (601), a pulley (602) and a chuck (603). The motor (601) drives the pulley mechanism to rotate in the same direction. The pulley (602) is rotationally connected to the chuck (603). The chuck (603) is engaged with a handle on the plastic valve for opening or closing the plastic valve.

7. The device for detecting water permeability of a plastic valve after production according to any one of claims 1 to 4, characterized in that: A supporting cylinder (700) is provided below the detection station on the workbench, and the supporting cylinder (700) is used to lift the fixture (800) upwards to the detection station.

8. The device for detecting water permeability of plastic valves after production according to claim 7, characterized in that: The jig (800) comprises a base (801) slidably mounted on the main beam (200), a bracket (802) spliced ​​and mounted on the base (801), an arc-shaped rail (803) fixedly mounted on the bracket (802), and two cross bars (804) slidably mounted on the arc-shaped rail (803), a stud (805) is provided between the two cross bars (804) for adjusting the width, and both cross bars (804) are provided with a frame block (806) for supporting the flanges on both sides of the plastic valve.

9. The device for detecting water permeability of plastic valves after production according to claim 8, characterized in that: A dovetail groove (807) is provided in the middle of the arc-shaped rail (803), and the cross bar (804) is slidably installed in the dovetail groove (807). The position of the cross bar (804) relative to the arc-shaped rail (803) can be fixed by a locking bolt.

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