Explosion-proof pressure testing device

Abstract

An anti-explosion pressure testing device belongs to the technical field of testing equipment and comprises an air compressor, a display screen, a control box, an electromagnetic valve, a pressure sensor, a machine body, an infrared transmitting mechanism, an infrared receiving mechanism, a sealing mechanism and a fixing mechanism. The air compressor, the display screen, the control box, the electromagnetic valve, the pressure sensor, the infrared emitting mechanism, the infrared receiving mechanism, the sealing mechanism, the fixing mechanism and the machine body are installed together. The device is mainly used for testing an MGU actuating mechanism, under the combined action of related mechanisms and during testing, after a product is placed at a testing station, the cover body can seal the product at the testing station through simple power switch operation, and under the combined action of the infrared emitting mechanism and the infrared receiving mechanism, the product can be conveniently tested. When a worker approaches to operate, a main power supply of related equipment can be cut off, so that the air tightness of a tested product can be ensured, the risk to the safety of the tester caused by product explosion in a test can be reduced, and a better safety effect can be relatively realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to test equipment technical field, especially a kind of explosion-proof pressure testing device. BACKGROUND

[0002] In production field, in order to guarantee the factory quality of some air pressure products reliable (such as the air tightness of MGU actuator of test electronic parking system EPB, specifically, electronic parking system EPB is converted into mechanical energy by MGU actuator, realizes parking brake.If the air tightness of the intake shell of actuator is not good, it can lead to system air leakage or insufficient pressure, thereby affecting the normal operation of parking function, even in emergency situation cannot effectively brake, endanger driving safety, therefore, it is very important to test the sealing performance of the intake shell of MGU actuator), or verify air pressure product quality after maintenance, need to pass into compressed air to product and carry out pressure maintaining test, test whether the air tightness and pressure resistance of its meet quality standard (generally gradually increase the test air pressure).In existing technology, generally, the product to be tested is fixed on the fixed seat with intake pipe at lower end (the pressure test end of test product and intake pipe are communicated), then the air compressor tank valve (generally solenoid valve) connected with intake pipe is opened, in this way, compressed air enters the pressure test end (such as the intake shell of MGU actuator) of product to be tested, test personnel gradually increase the compressed air pressure output by air compressor, close the tank valve after reaching the set pressure value, subsequently, the air tightness of product to be tested is obtained by observing and reading the pressure switch connected with intake pipe in parallel (actually, the voltage signal output by pressure switch is displayed by liquid crystal display screen etc., in MGU actuator test, generally need to pressurize to the rupture of plastic shell of MGU actuator to obtain the pressure resistance data of shell), in test, air pressure does not drop or drops little within a certain time in the allowable error range, which represents that product is qualified, otherwise, it is unqualified (or corresponding air pressure explodes to be qualified, corresponding air pressure explodes to be unqualified).

[0003] Although existing product air tightness test equipment meets the test work needs to some extent, but due to structure limitation, there are still following technical problems. Specifically, in test, product does not have a sealing mechanism, due to exposure in air for test, if test personnel interval test position spacing is too close, the debris produced after explosion of shell can easily cause test personnel skin etc. to be hurt, there is great safety hazard. Also, when test personnel artificially approach fixed or remove test product, in extreme case, when operating error intake pipe continues to intake, due to spacing being too close, the debris produced after explosion of product can cause greater harm to test personnel. In summary, it is particularly necessary to provide a kind of explosion-proof pressure test equipment capable of guaranteeing the safety of test personnel. UTILITY MODEL CONTENT

[0004] In order to overcome the existing product air tightness test equipment due to the limitation of structure, there are disadvantages as described in the background, the utility model provides mainly for MGU actuator test use, under the joint action of relevant mechanism, in the test, can seal the product in the test station by explosion-proof tool, and the total power supply of related equipment can be disconnected when the staff approaches and operates, thereby ensuring the air tightness of the test product, and relatively realizing better safety effect on the basis of testing product air tightness.

[0005] The technical scheme adopted by the utility model to solve its technical problems is:

[0006] An explosion-proof pressure test device, comprising an air compressor, a display screen, a control box, a solenoid valve, a pressure sensor, a machine body, an infrared emission mechanism, an infrared receiving mechanism, further comprising a sealing mechanism and a fixing mechanism, the machine body is internally provided with an isolation plate, the air compressor is installed at the lower end of the isolation plate, the front upper end of the machine body is of an open structure, the infrared emission mechanism and the infrared receiving mechanism are distributed left and right and are respectively installed at the front upper end of the machine body, the display screen is installed in the control box, the fixing mechanism comprises a fixing seat and a buffer support seat, the isolation plate is provided with an opening, a branch pipe is installed at the lower end of the opening, the gas tank exhaust pipe of the air compressor is connected with one end of the solenoid valve, the solenoid valve is provided with a connecting pipe at the other end, and the gas inlet pipe of the pressure sensor is installed at the side end of the exhaust pipe

[0007] , the other end of the connecting pipe is connected with the lower end of the branch pipe; the fixing seat is installed on the isolation plate, the fixing seat is provided with a gas inlet hole communicating with the branch pipe, the buffer support seat comprises at least two sets, and the lower ends of the two sets of buffer support seats are respectively installed at the two side ends of the fixing seat; the sealing mechanism comprises a cover body, a cylinder, a linear slide table and a fixing frame, the fixing frame is installed at the two side ends of the two sets of buffer support seats, the cylinder body is installed on the upper end of the fixing frame, the lower end of the cover body is of an open structure, and the upper end of the cover body and the lower end of the piston rod of the cylinder are installed together; the linear slide table comprises at least two sets, the two sets of linear slide tables are respectively fixed at the inner sides of the lower two ends of the fixing frame, and the two sides of the cover body are respectively installed together with the sliding blocks of the two sets of linear slide tables; the power output end of the infrared receiving mechanism is electrically connected with the power input ends of the pressure sensor and the display screen.

[0008] Further, the solenoid valve is a normally closed valve core solenoid valve.

[0009] Further, the emission surface of the infrared emission mechanism and the receiving surface of the infrared receiving mechanism are in a face-to-face structure, the infrared receiving mechanism is provided with a relay, the relay control power input end is connected with the positive power input end of the infrared receiving mechanism, the positive power output end of the infrared receiving mechanism is connected with the positive power input end of the relay, and the negative power input end of the infrared receiving mechanism is connected with the negative power input end of the relay.

[0010] Further, the buffer comprises a fixed tube, a movable tube, and a spring, the spring is located in the lower end of the fixed tube, the lower end of the movable tube is movably located in the upper end of the fixed tube, the upper end of the movable tube is provided with a limiting block, and the lower end of the fixed tube is installed on the side end of the fixed seat.

[0011] Further, the spacing between the limiting blocks of the two sets of buffers is consistent with the spacing between the left and right end fixed holes of the MGU actuator, the outer diameter of the limiting blocks is smaller than the inner diameter of the fixed holes, and the outer diameter of the upper end of the fixed seat is larger than the outer diameter of the air inlet shell of the MGU actuator.

[0012] Compared with the prior art, the utility model has the beneficial effects that: the utility model is mainly used for MGU actuator test, under the joint action of related mechanisms, the MGU actuator (product) is placed in the test station, and simple power switch operation can seal the product in the test station by the cover body (explosion-proof tooling), and under the joint action of the infrared emission mechanism and the infrared receiving mechanism, the total power supply of related equipment can be disconnected when the operator approaches and operates, thereby guaranteeing the air tightness of the test product, reducing the risk of explosion of the product during the test to the safety of the test personnel, and relatively realizing better safety effect. Based on the above, the utility model has good application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model will be further described below in combination with the drawings and embodiments.

[0014] Figure 1 It is the overall structure schematic diagram of the utility model.

[0015] Figure 2 It is the local structure schematic diagram of the utility model.

[0016] Figure 3 It is the circuit diagram of the utility model.

[0017] Figure 4 It is the local structure schematic diagram of the MGU actuator of the utility model (the arrow points to the sealing test shaft sealing position of the MGU actuator). DETAILED DESCRIPTION

[0018] Figure 1 、 2, 3, 4, an explosion-proof pressure testing device, including air compressor (not shown in the figure), display screen P, control box 1, power module U1, electromagnetic valve DC1, pressure sensor U4, power switch S1, S2, S3, body 2, infrared emitter mechanism U2, infrared receiving mechanism U3, also has sealing mechanism 3, fixed mechanism 4; The body middle part is welded with a isolation plate 21, which divides the body 2 into two parts, the air compressor is fixedly installed at the lower end of the body 2, the upper end of the body 2 is open structure, the infrared emitter mechanism U2, infrared receiving mechanism U3 are distributed with a certain distance apart and fixedly installed at the left and right parts of the upper end of the isolation plate 21 of the body 2; The display screen P, power switch S1, S2, S3, power module U1, display screen P are installed in the control box 1, and the handle of the power switch and the display interface of the display screen P are respectively located outside the opening and the aperture of the front end of the control box 1, the fixed mechanism includes fixed seat 41 and buffer support seat 42, the middle part of the isolation plate 21 has an aperture 211, the lower end of the aperture 211 is welded with a branch pipe 212, the air tank exhaust pipe of the air compressor and one end of the electromagnetic valve DC1 are fixedly connected through threads, the other end of the electromagnetic valve DC1 is fixedly installed with a connecting pipe (not shown in the figure), the upper end of the exhaust pipe (not shown in the figure) has a silk hole, the air inlet pipe of the pressure sensor U4 is fixedly installed in the silk hole and communicates with the exhaust pipe, the other end of the connecting pipe and the lower end of the branch pipe 212 are connected through a hose with strength; The fixed seat 41 is fixedly installed on the aperture 211 in the middle part of the isolation plate 21, the middle part of the fixed seat 41 has an air inlet hole communicating with the branch pipe, the buffer support seat 42 has two sets, the lower ends of the two sets of buffer support seats 42 are fixedly installed on the two sides of the fixed seat 41; The sealing mechanism includes cover 31 (Π type structure), cylinder 32, linear slide 33, fixed frame 34, the lower end of the fixed frame 34 is fixedly installed on the upper end of the middle part of the isolation plate 21 and located on the two sides of the fixed seat 41, the upper end of the middle part of the fixed frame 34 has an aperture, the cylinder body of the cylinder 32 is fixedly installed vertically on the upper end of the middle part of the fixed frame 34 and the piston rod of the cylinder is located downward on the upper end of the lower part of the fixed frame through the aperture (the inner diameter is larger than the outer diameter of the piston), the lower end of the cover 31 is open structure, the upper end of the cover 31 (which can be made of transparent acrylic material) is fixedly installed with the lower end of the piston rod of the cylinder 32; The linear slide 33 has two sets, the two sets of linear slides 33 are fixedly installed vertically on the inner sides of the lower two ends of the fixed frame 34, the left and right outer middle parts of the cover 31 are fixedly installed with the inner side sliding blocks of the two sets of linear slides 32; The inlet and outlet electromagnetic valves outside the upper and lower ends of the cylinder barrel of the cylinder 32 and the air tank exhaust pipe of the air compressor are connected in parallel through pipelines;The power input 1 and 2 pins of the power module U1 are connected to the two poles of the AC 220V power supply through wires, the power output 3 and 4 pins of the power module U1 are connected to the power input 1 and 2 pins of the infrared emission mechanism U2 and the power input 1 and 2 pins of the infrared receiving mechanism U3 through wires respectively, the power output end of the infrared receiving mechanism U3 is connected to the normally open contact end of the relay K1 and the negative power input end, and the power input end of the three power switches S1, S2 and S3, the power input 1 and 2 pins of the pressure sensor U4 and the power input 1 and 2 pins of the liquid crystal display P are connected through wires respectively, the power output end of the three power switches S1, S2 and S3 and the 4 pin of the power module U1 are connected to the power input end of the electromagnetic valve DC1, the air cylinder and the air inlet and exhaust electromagnetic valves DC2 and DC3 through wires respectively, and the signal output 3 and 2 pins of the pressure sensor U4 are connected to the power input end of the liquid crystal display P (a liquid crystal voltage display meter can be used) through wires.

[0019] Figure 1 、 2 The electromagnetic valve DC1 is a normally closed valve core electromagnetic valve. The emission surface of the infrared emission mechanism U2 and the receiving surface of the infrared receiving mechanism U3 are in a face-to-face structure, and the infrared receiving mechanism U3 is matched with a relay K1, the power input end of the relay K1 is connected to the positive power input 1 pin of the infrared receiving mechanism U3, the positive power output 3 pin of the infrared receiving mechanism U3 is connected to the positive power input end of the relay K1, and the negative power input 2 pin of the infrared receiving mechanism U3 is connected to the negative power input end of the relay K1. The buffer support seat 42 includes a fixed tube 421, a movable tube 422 and a spring 423, the spring 423 is located at the lower end of the fixed tube 421, the lower end of the movable tube 422 is movably located in the upper end of the fixed tube 421, the upper end of the movable tube 422 has a circular limiting block 424, and the lower end of the fixed tube 421 is fixedly installed on the side end of the fixed seat 41. The spacing between the limiting blocks 424 of the two buffers is consistent with the spacing between the left and right end fixed holes of the MGU execution mechanism 5, and the outer diameter of the limiting block 424 is smaller than the inner diameter of the fixed hole, the outer diameter of the upper end of the fixed seat 41 is greater than the outer diameter of the lower end of the air inlet shell of the MGU execution mechanism 5, and when the piston rod of the air cylinder 32 descends to the bottom dead center, the upper end of the cover body 31 is in close contact with the outer end of the MGU execution mechanism, thereby achieving the fixing effect (at this moment, the lower end of the air inlet shell of the MGU execution mechanism 5 is in sealing contact with the upper end of the fixed seat).

[0020] Figure 1 、 2, 3, 4, the new type is mainly used for MGU actuator 5 test. 220V AC power into the power supply module U1 power input, power module U1 3, 4 pin output stable DC 12V power supply into the infrared emitter mechanism U2 and infrared receiver mechanism U3 power input. In actual cases, when the test personnel do not fix or remove the product, due to the hand does not block the infrared emitter mechanism U2 emission surface, the infrared receiver mechanism U3 light receiving surface receives light, its 3 pin output high level into the relay K1 positive power input, the relay K1 power input and normally open contact end closure, so that the three power switches and pressure sensor U4, LCD display P, etc. Power input gets electricity, the test personnel can operate the relevant components normally; When the test personnel approach the need to fix or remove the product, due to the hand blocks the infrared emitter mechanism U2 emission surface, the infrared receiver mechanism U3 light receiving surface can not receive light, its 3 pin stop output high level into the relay K1 positive power input, the relay K1 power input and normally open contact end open circuit, so that the three power switches and pressure sensor U4, LCD display P, etc. Power input loses electricity, the test personnel can not operate the relevant components normally. Through the above, the new type can control all the relevant equipment power off when the test personnel approach the disassembly parts, prevent extreme cases, the test product explosion to the safety of the test personnel to bring the risk (such as the test personnel approach operation, open the electromagnetic valve DC1 power switch, the gas pressure is too large to cause the product to burst, causing the test personnel to be injured, open the relevant power switch of the air cylinder, the air cylinder drive cover body height, cover body lower end will test personnel hand pressure injury, etc.), can realize better safety effect.

[0021] Figure 1 、 2, 3, 4, the tester will MGU executive mechanism 5 (product) in the test station, two buffer limit block 424 is located in the MGU executive mechanism 5 left and right end fixed hole, and the upper part of the fixed seat 41 contact MGU executive mechanism 5 intake shell lower end, then the tester opens the cylinder 32 cylinder upper end inlet and exhaust solenoid valve DC2 power switch S2, the air compressor output compressed air into the cylinder 32 cylinder upper end (cylinder lower end of the air cylinder through the lower end of the cylinder inlet and exhaust solenoid valve DC3 exhaust port discharge), the cylinder piston rod driven cover 31 down to the stop point (turn off the power switch), cover 31 in the upper end of the MGU executive mechanism, respectively, play a fixed role (fixed seat 41 upper sealing contact MGU executive mechanism 5 intake shell lower end). Then the tester opens the power switch S1 of the electromagnetic valve DC, the electromagnetic valve DC spool open, the air compressor output compressed air through the fixed seat 41 into the MGU executive mechanism 5 intake shell, the tester gradually increases the air compressor output pressure, after reaching the set pressure value, the power switch S1 of the electromagnetic valve DC is closed, and the subsequent observation and the pressure switch U4 parallel inlet pipe reading is obtained. The air tightness of the tested product is actually the voltage signal output by the pressure switch U4 through the liquid crystal display screen P (the higher the pressure, the larger the data displayed on the display screen, and vice versa), specifically, in the MGU executive mechanism test, it is generally necessary to pressurize to the plastic shell of the MGU executive mechanism to break to obtain the pressure data of the shell. After the shell explosion, the tester can directly observe the data displayed on the display screen P in real time to understand the explosion pressure data of the MGU executive mechanism intake shell. After testing, the tester opens the power switch S3 of the cylinder 32 cylinder lower end inlet and exhaust solenoid valve DC3, the air compressor output compressed air into the cylinder 32 cylinder lower end (the air in the upper end of the cylinder is discharged through the exhaust port of the cylinder upper end inlet and exhaust solenoid valve DC1), the piston rod of the cylinder 32 drives the cover 31 to rise to the stop point (turn off the power switch), the lower end of the cover 31 and the MGU executive mechanism are separated, and the detection work is completed. Then the tester takes the MGU executive mechanism 5 to complete the whole process. Figure 3 As shown, the power module U1 is an AC 220V to DC 12V power module finished product, the electromagnetic valve DC is a normally closed spool electromagnetic valve with a power of 2W; the relay K1 is a DC 12V type; the infrared transmitting mechanism U2 and the infrared receiving mechanism are ZT0420 infrared beam detection finished products of the U3 light curtain type; the pressure sensor U4 is a MIK-P300 type with two power input terminals and one signal output terminal; the display screen P is a liquid crystal voltmeter with voltage function display.

[0022] The basic principle and main features of the present application and the advantages of the present application are shown and described above. For those skilled in the art, it is obvious that the present application is limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0023] In addition, it should be understood that, although the present application is described in the form of an embodiment, the embodiment does not only contain one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An anti-explosion pressure testing device, comprising an air compressor, a display screen, a control box, a solenoid valve, a pressure sensor, a machine body, an infrared transmitting mechanism, and an infrared receiving mechanism, characterized in that, The utility model also has sealing mechanism, fixed mechanism, install the isolation board in the organism, install the air compressor in the isolation board lower extreme, the organism upper end front part is open type structure, infrared ray emission mechanism, infrared ray receiving mechanism left and right distribution respectively install in the organism front upper end, the display screen installs in the control box, fixed mechanism includes fixed seat and buffer support base, the isolation board has the opening, the opening lower extreme installs the branch pipe, the air compressor's gas holder exhaust pipe and solenoid valve one end connection, solenoid valve other end installs the connecting pipe, the pressure sensor's intake pipe installs in the exhaust pipe side end, and the connecting pipe other end and branch pipe lower extreme connect, the fixed seat installs on the isolation board, and the fixed seat has and the intake hole of branch pipe in intercommunication, buffer support base has at least two sets, and the lower extreme of two sets of buffer support base is installed in the both sides of fixed seat, the sealing mechanism includes cover body, cylinder, linear slide, fixed frame, fixed frame lower extreme installs in the both sides of two sets of buffer support base, the cylinder body installs in the fixed frame upper end, and the cover body lower extreme is open type structure, and the cover body upper end and the piston rod lower end of cylinder are installed together, the linear slide has at least two sets, and two sets of linear slide are fixed in the inside of two ends of fixed frame respectively, and the both sides of cover body are installed together with the sliding block of two sets of linear slide, the power output end of infrared ray receiving mechanism and the power input end of pressure sensor, display screen electric connection.

2. The explosion-proof pressure testing device of claim 1, wherein, The solenoid valve is a normally closed valve core solenoid valve.

3. The explosion-proof pressure testing device of claim 1, wherein, The emitting surface of the infrared ray emission mechanism and the receiving surface of the infrared ray receiving mechanism are in a face-to-face structure, and the infrared ray receiving mechanism is equipped with a relay, the relay control power input end is connected with the positive power input end of the infrared ray receiving mechanism, the positive power output end of the infrared ray receiving mechanism is connected with the positive power input end of the relay, and the negative power input end of the infrared ray receiving mechanism is connected with the negative power input end of the relay.

4. The explosion-proof pressure testing device of claim 1, wherein, The buffer includes a fixed tube, a movable tube and a spring, the spring is located in the lower end of the fixed tube, the movable tube is movably located in the upper end of the fixed tube, the upper end of the movable tube is limited by a limiting block, and the lower end of the fixed tube is installed on the side end of the fixed seat.

5. The explosion-proof pressure testing device of claim 1, wherein, The distance between the limiting blocks of the two sets of buffers is consistent with the distance between the fixed holes at the left and right ends of the MGU execution mechanism, and the outer diameter of the limiting blocks is smaller than the inner diameter of the fixed holes, and the outer diameter of the upper end of the fixed seat is greater than the outer diameter of the air inlet shell of the MGU execution mechanism.

Images