Solenoid valve performance testing device

Abstract

The utility model relates to the technical field of machine tool processing, and discloses an electromagnetic valve performance testing device, which comprises an operating platform, a clamp assembly arranged at the top of the operating platform, a fixing plate, a cylinder mounted on the fixing plate, a sensor module connected to the output end of the cylinder, and a push block fixed at the front end of the sensor module, a sealing rubber sheet is arranged on the front side face of the push block, a clamp is arranged on the front side of the push block, the sealing rubber sheet is of a cylinder structure, two conductive rubber strips which are symmetrically arranged left and right and are of semicircular ring structures are embedded in the sealing rubber sheet, and a gap is formed between the ends of the two conductive rubber strips; the two end points of each conductive rubber strip are electrically connected with conductive connectors respectively, through holes for the conductive connectors to penetrate through are formed in the front end face of the push block, and the two conductive connectors of each conductive rubber strip are connected with an alarm circuit board arranged in the push block through electric connecting wires. According to the utility model, the sound-light alarm is triggered through the on / off state of the conductive rubber strip arranged in the sealing film.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe processing technical field, in particular to a solenoid valve performance testing device. BACKGROUND

[0002] The solenoid valve performance test platform is usually integrated with the automatic test platform of mechanical, pneumatic / hydraulic, sensing, measurement and control and software, aims at the quick, accurate and traceable detection of the key performance index of the solenoid valve. It usually includes a fixture with three fixed interfaces, the fixture is placed on the operation platform, a sensor module connected with the air cylinder, the sensor module is connected with a push plate, two sealing rubber sheets are arranged on the push plate, when the measured solenoid valve is placed on the fixture, three fixed interfaces are connected with three gas ports of the solenoid valve, the push plate is tightly pressed on the A port and B port of the solenoid valve under the action of the air cylinder, and physical sealing is carried out. The electrical plug of the solenoid valve is connected through the power supply test connector, and the solenoid valve can be automatically tested by pressing the test button. However, the sealing rubber sheet is a consumable part, and will be worn, fallen or deformed after long-term use, and the existing structure does not have any monitoring device, so that the sealing gasket cannot be found in time after failure, which will cause the detection gas path to leak, cause the detection data to be distorted, and affect the accuracy of the detection result. SUMMARY

[0003] Therefore, the utility model aims at providing a solenoid valve performance testing device to solve the problems mentioned in the background.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A solenoid valve performance testing device, comprising an operation table, a fixture assembly is arranged on the top of the operation table, the fixture assembly comprises a fixed plate, an air cylinder is installed on the fixed plate, a sensor module is connected with the output end of the air cylinder, a push block is fixed at the front end of the sensor module, a sealing rubber sheet is arranged on the front side of the push block, a fixture is arranged on the front side of the push block, the sealing rubber sheet is a cylindrical structure, two symmetrical semicircular ring structure conductive rubber strips are embedded in the sealing rubber sheet, and gaps are arranged between the ends of the two conductive rubber strips; the two ends of the conductive rubber strip are respectively connected with conductive connectors, a through hole is arranged on the front end face of the push block for the conductive connector to pass through, the two conductive connectors of each conductive rubber strip pass through the corresponding position through hole to the inside of the push block, and are connected with the alarm circuit board arranged in the push block through the electric connection line.

[0006] Further, the alarm circuit board comprises a photocoupler, a resistor R1, a resistor R2, a resistor R3, a buzzer and an alarm lamp arranged on the substrate, one conductive connector of the conductive rubber strip is connected with the first pin of the current-limiting resistor R1 through an electric connecting wire, the second pin of the current-limiting resistor R1 is connected with the first pin of the photocoupler, the second pin of the photocoupler is connected to the power supply ground; the fourth pin of the photocoupler is connected with the positive pin of the buzzer, the negative pin of the buzzer is grounded; the third pin of the photocoupler is connected with the 24V power supply through the resistor R3, and the other conductive connector of the conductive rubber strip is connected with the 24V power supply.

[0007] Further, the fourth pin of the photocoupler is also connected with the positive pin of the alarm lamp through the resistor R2, and the negative pin of the alarm lamp is grounded.

[0008] Further, a plug column is arranged at the center of the rear end surface of the sealing rubber sheet, a plug hole is arranged at the front end surface of the push block close to the plug column, the plug column is inserted into the plug hole, and the plug column and the plug hole are in interference fit; a convex ring is arranged at the circumferential edge of the outer end surface of the sealing rubber sheet.

[0009] Further, the surface of the operation table is provided with a plurality of parallel clamping grooves, the back surface of the fixing plate is rotationally connected with a U-shaped rotating frame, the bottom of the rotating frame is parallel to the clamping grooves, and the bottom of the rotating frame can be clamped in the clamping grooves.

[0010] Further, the back surface of the fixing plate is provided with a U-shaped containing groove, the rotating frame is contained in the containing groove, and the top of the rotating frame is rotationally connected with the side walls of the containing groove.

[0011] Further, the bottom of the rotating frame is provided with elastic clamping teeth at both ends, the clamping teeth are arc protruding structures, and the both ends of the clamping grooves are provided with tooth grooves.

[0012] Further, the front end of the fixing plate is rotationally connected with the top surface of the operation table through a hinge.

[0013] Further, the fixing plate is provided with a handle. Beneficial effects

[0014] Compared with the prior art, the utility model at least has the following advantages:

[0015] The utility model discloses a sealing rubber sheet built-in conductive rubber strip's on-off state triggers sound light alarm, need not complex control module, response is quick, and failure rate is low. The alarm device does not work when the sealing rubber sheet is normal, and immediately starts the double early warning of buzzer and alarm lamp when the sealing rubber sheet is invalid, and it is convenient for operating personnel to discover the fault and handle in the first time, avoids the deviation of test data or the damage of device because of the sealing invalidity. The insulating coating treatment between the conductive connector and the side wall of the through hole can effectively prevent the short circuit of the conductive connector and the metal push block, and guarantee the safe work of the circuit. The fixture assembly is matched with the operation table clamping groove through the U-shaped rotating frame on the back of the fixed plate, can realize multi-angle inclined positioning, and meets the demand of the different visual angle observation of the solenoid valve connection state of operating personnel. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural diagram of the utility model.

[0017] Figure 2 It is the structural diagram of the fixture assembly of the utility model.

[0018] Figure 3 It is the structural diagram of the push block of the utility model.

[0019] Figure 4 It is the structural diagram of the sealing rubber sheet of the utility model.

[0020] Figure 5 It is the sectional structure diagram of the sealing rubber sheet of the utility model.

[0021] Figure 6 It is the structural diagram of the conductive rubber strip of the utility model.

[0022] Figure 7 It is the connection structure diagram of the conductive rubber strip and the alarm circuit board of the utility model.

[0023] Figure 8 It is the structural diagram of the fixed plate angle adjustment of the utility model.

[0024] Figure 9 It is the structural diagram of the back of the fixed plate of the utility model.

[0025] Marked in the drawing: 1-operation table;2-fixing assembly;20-cylinder;21-sensor module;22-push block;220-jack;221-through hole;23-sealing rubber sheet;24-slideway;25-fixed plate;250-receiving groove;26-clamp;3-insert column;4-alarm circuit board;5-conductive rubber strip;6-convex ring;7-conductive connector;8-optoelectronic coupler;10-rotating frame;11-clamping groove;12-clamping tooth;13-positioning groove;14-inclined gap;15-hinge. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, specific embodiments will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways beyond the specific details set forth herein without departing from the scope of the present application. It should be noted that the present application is not limited to the specific implementations described herein but can be practiced with modifications within the scope of the present application.

[0027] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it should be noted that when an element is referred to as being "connected", "coupled", or "adjacent" to another element, it can be directly connected, coupled, or adjacent to the other element or intervening elements can also be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] Referring to Figures 1-9 The present embodiment provides a kind of electromagnetic valve performance testing device, including operation platform 1, the top of the operation platform 1 is provided with clamp assembly 2, the clamp assembly includes fixed plate 25, the fixed plate is installed with air cylinder 20, the output end of the air cylinder 20 is connected with sensor module 21, the front end of the sensor module 21 is fixed with push block 22, the front side of the push block 22 is provided with two sealing rubber sheets 23, the front side of the push block 22 is provided with clamp 26, the bottom of the sensor module 21 is provided with sliding block, the fixed plate 25 is provided with sliding rail 24, the sliding block is slidably connected with sliding rail 24, under the action of air cylinder 20, push block 22 is guided to the direction of clamp 26 movement, the electromagnetic valve to be measured is clamped between clamp 26 and push block 22.

[0030] The sealing rubber sheet 23 is an insulating elastic cylinder, and two symmetrical semicircular ring structure conductive rubber strips 5 are embedded in the sealing rubber sheet 23 by a molding process, and gaps are arranged between the ends of the two conductive rubber strips 5. A plug 3 is arranged at the center of the rear end surface of the sealing rubber sheet 23, and a plug hole 220 is arranged at the front end surface of the push block 22 close to the plug 3, the plug 3 is inserted into the plug hole 220, and the plug 3 and the plug hole 220 are in interference fit. A convex ring 6 is arranged on the outer end surface of the sealing rubber sheet 23, so that the sealing rubber sheet 23 can better block the air port of the electromagnetic valve.

[0031] The two ends of the conductive rubber strip 5 are respectively electrically connected with conductive connectors 7, and the conductive connectors 7 extend out of the rear end surface of the sealing rubber sheet 23. Four through holes 221 are arranged on the front end surface of the push block 22 for the conductive connectors 7 to pass through, corresponding to the four conductive connectors 7 of the two conductive rubber strips 5. The two conductive connectors 7 of each conductive rubber strip 5 pass through the corresponding position through holes 221 to the inside of the push block 22, and are connected with the alarm circuit board 4 arranged in the push block 22 through the electric connection line. An insulating coating is arranged between the conductive connector 7 and the side wall of the through hole 221, which can effectively prevent the conductive connector 7 from short-circuiting with the metal push block, and ensure the safety of the circuit work.

[0032] Specifically, the alarm circuit board 4 includes a substrate and an NPN type photoelectric coupler 8, a resistor R1, a resistor R2, a resistor R3, a buzzer and an alarm lamp arranged on the substrate. One conductive connector 7 of the conductive rubber strip 5 is connected with the first pin of the current limiting resistor R1 through the electric connection line, the second pin of the current limiting resistor R1 is connected with the first pin of the photoelectric coupler 8, and the second pin of the photoelectric coupler 8 is connected to the power supply ground. The fourth pin emitter of the photoelectric coupler is connected with the positive pin of the buzzer, and the negative pin of the buzzer is grounded. Preferably, the fourth pin emitter of the photoelectric coupler is also connected with the positive pin of the alarm lamp through the resistor R2, and the negative pin of the alarm lamp is grounded. The buzzer and the alarm lamp are connected in parallel to ensure simultaneous work without affecting each other. The third pin collector of the photoelectric coupler is connected with the 24V power supply through the resistor R3. The other conductive connector 7 of the conductive rubber strip 5 is connected with the 24V power supply. An observation hole is arranged on the push block 22 to observe the alarm light. It should be noted that the sum of the working currents of the buzzer and the alarm lamp should be less than the maximum collector current Ic(max) of the selected photoelectric coupler output side photosensitive triode, so as to ensure sufficient driving capacity in the alarm state.

[0033] When the sealing film 23 is not worn and is in normal working condition, the conductive rubber strip 5 inside it remains conductive. The 24V power supply forms a closed loop at the input terminal of the optocoupler 8 through the conductive rubber strip 5 and the current-limiting resistor R1. The light-emitting diode inside the optocoupler 8 is energized and illuminates, exciting the internal phototransistor to conduct, thus connecting the collector and emitter of the optocoupler 8. At this time, the potential of the emitter (fourth pin) of the optocoupler 8 is pulled close to the power supply ground potential. There is no effective voltage difference between the buzzer and the alarm light, no current flows, the buzzer does not sound, the alarm light does not light up, and the device has no alarm signal.

[0034] When the sealing film 23 fails due to wear, the conductive rubber strip 5 inside it breaks along with the damaged sealing structure. The power supply circuit at the input of the optocoupler 8 is interrupted, the internal light-emitting diode is de-energized and turns off, and the phototransistor is cut off. The path between the collector and emitter of the optocoupler 8 is broken. At this time, the emitter (fourth pin) of the optocoupler 8 obtains a 24V power supply potential through the pull-up resistor R3. A 24V effective voltage difference is formed across the buzzer and the alarm light. Current flows through the buzzer and the alarm light connected in series with the current-limiting resistor R2, triggering the buzzer to sound and the alarm light to light up, realizing a synchronous audible and visual alarm for the wear and failure of the sealing film, and providing timely feedback on the sealing fault status.

[0035] The angle of the clamp assembly is adjusted to facilitate operator observation of the solenoid valve connection. The front end of the fixing plate 25 is rotatably connected to the top surface of the operating table 1 via a hinge 15. The surface of the operating table 1 is provided with multiple parallel slots 11. A U-shaped rotating frame 10 is rotatably connected to the back of the fixing plate 25. The bottom of the rotating frame 10 is parallel to the slots 11, and the bottom of the rotating frame 10 can be engaged in the slots 11. Preferably, the back of the fixing plate 25 is provided with a U-shaped receiving groove 250, in which the rotating frame 10 is received. Two locking posts are provided on both sides of the top two ends of the rotating frame 10. These locking posts are embedded in the recesses on the side walls of the receiving groove 250, allowing the rotating frame 10 to be rotatably connected to the side walls of the receiving groove 250. The bottom two ends of the rotating frame 10 are each provided with elastic locking teeth 12, which are arc-shaped protrusions. The two side walls of the slots 11 are each provided with toothed grooves, and the locking teeth 12 are adapted to engage with these grooves. The bottom sides of the receiving groove 250 are also provided with positioning grooves 13 that are adapted to engage with the locking teeth 12. Preferably, the fixing plate 25 is provided with a handle, and the bottom of the receiving groove 250 is provided with two symmetrical inclined notches 14, so that the bottom of the rotating frame 10 protrudes from the receiving groove 250, making it convenient to grasp the bottom of the rotating frame 10 by hand.

[0036] The front end of the fixed plate 25 is rotatably connected with the top surface of the operation table 1 through a hinge, and the back surface of the fixed plate 25 is positioned through cooperation of the rotating frame 10 and the clamping groove 11 of the operation table 1, so that multi-angle inclined fixation of the clamp assembly is realized. When it is needed to incline the clamp assembly 2, the handle is pulled to incline the clamp assembly 2, the bottom of the rotating frame 10 is pried upward, the clamping tooth 12 at the bottom is separated from the positioning groove 13 at the bottom of the containing groove 250, the rotating frame 10 is taken out from the containing groove 250, the rotating frame 10 is rotated to a desired angle, and the bottom of the rotating frame 10 is clamped in the clamping groove 11 for positioning. The clamping tooth 12 is embedded in the corresponding tooth groove, and the clamping tooth is tightly combined with the side wall of the tooth groove, so that relative sliding or loosening between the rotating frame 10 and the clamping groove 11 is effectively prevented, and the inclination angle of the clamp assembly 2 is stably positioned. When it is needed to disassemble and adjust the angle, the rotating frame 10 is pried, the clamping tooth 12 is separated from the tooth groove by overcoming the elastic force, and then the rotating frame 10 can be taken out from the clamping groove 11.

[0037] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A solenoid valve performance testing device, comprising an operating table, a clamping assembly disposed on the top of the operating table, the clamping assembly comprising a fixing plate, a cylinder mounted on the fixing plate, a sensor module connected to the output end of the cylinder, a push block fixed to the front end of the sensor module, a sealing film disposed on the front side of the push block, and a clamp disposed on the front side of the push block, characterized in that, The sealing film has a cylindrical structure, and two symmetrically arranged semi-circular conductive rubber strips are embedded inside it. A gap is provided between the ends of the two conductive rubber strips. The two ends of the conductive rubber strips are electrically connected to conductive connectors. The front end face of the push block is provided with a through hole for the conductive connectors to pass through. The two conductive connectors of each conductive rubber strip pass through the corresponding through hole into the push block and are connected to the alarm circuit board located inside the push block through an electrical connection wire.

2. The solenoid valve performance testing device according to claim 1, characterized in that, The alarm circuit board includes an optocoupler, resistors R1, R2, and R3, a buzzer, and an alarm light mounted on a substrate. One conductive connector of the conductive rubber strip is connected to the first pin of the current-limiting resistor R1 via an electrical connection wire. The second pin of the current-limiting resistor R1 is connected to the first pin of the optocoupler, and the second pin of the optocoupler is connected to the power ground. The emitter of the fourth pin of the optocoupler is connected to the positive pin of the buzzer, and the negative pin of the buzzer is grounded. The collector of the third pin of the optocoupler is connected to a 24V power supply via resistor R3, and the other conductive connector of the conductive rubber strip is connected to a 24V power supply.

3. The solenoid valve performance testing device according to claim 2, characterized in that, The fourth pin of the optocoupler is also connected to the positive pin of the alarm light through resistor R2, and the negative pin of the alarm light is grounded.

4. The solenoid valve performance testing device according to claim 1, characterized in that, The sealing film has a protruding post at the center of its rear end face, and the push block has a insertion hole on its front end face near the post. The post is inserted into the insertion hole, and the post and insertion hole are interference fit. The outer end face of the sealing film has a protruding ring around its periphery.

5. The solenoid valve performance testing device according to claim 1, characterized in that, The surface of the operating table is provided with multiple parallel slots. The back of the fixed plate is rotatably connected to a U-shaped rotating frame. The bottom of the rotating frame is parallel to the slots and can be locked into the slots.

6. The solenoid valve performance testing device according to claim 5, characterized in that, The back of the fixing plate is provided with a U-shaped receiving groove, the rotating frame is accommodated in the receiving groove, and its top two ends are respectively rotatably connected to the side wall of the receiving groove.

7. The solenoid valve performance testing device according to claim 6, characterized in that, The bottom two ends of the rotating frame are respectively provided with elastic locking teeth, the locking teeth are arc-shaped protrusions, and the two end side walls of the locking groove are respectively provided with tooth grooves.

8. The solenoid valve performance testing device according to claim 5, characterized in that, The front end of the fixed plate is rotatably connected to the top surface of the operating table via a hinge.

9. The solenoid valve performance testing device according to claim 1, characterized in that, The fixing plate is equipped with a handle.

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