A quality inspection equipment for automobile thermostat production

Abstract

The present invention discloses a quality inspection device for automobile thermostat production, which belongs to the technical field of automobile parts quality inspection, including a rotating inspection platform and a center column rotatably arranged at the center of the rotating inspection platform, a mounting slide rail that plays a supporting role is rotatably arranged on the side wall of the rotating inspection platform, a circumferentially distributed detection groove is provided at the top of the rotating inspection platform, an indicator light is arranged at the detection groove at the top of the rotating inspection platform, and a mounting ring is fixedly connected to the inner wall of the detection groove. The present invention is provided with a rotating inspection platform, a detection mechanism and a water circulation mechanism, and the detection mechanism cooperates with the water circulation mechanism, utilizes the principle of controlling variables, eliminates interference from other factors, injects hot water into the detection groove in batches, and judges whether the various indicators of the thermostat are qualified by monitoring whether the opening and closing distance of the main valve is qualified, thereby being able to accurately determine the cause of the thermostat failure, and play an indicative role for the subsequent factory return inspection and process improvement of defective thermostats.

Description

Technical Field

[0001] The invention relates to the technical field of automobile component quality inspection, and in particular to quality inspection equipment for automobile thermostat production. Background Art

[0002] Thermostats are divided into electronic thermostats and mechanical thermostats. They are valves that control the flow path of the coolant. They are automatic temperature control devices and are temperature control devices in the cooling system of automobile engines.

[0003] After the thermostat is pre-assembled (the return spring of the thermostat is not connected to the base of the thermostat at this time), it needs to be quality inspected. The main item of the inspection is whether the thermostat can realize normal opening and closing functions under high temperature environment. The inspection method is mainly to heat the thermostat in a water bath and observe whether the main valve of the thermostat moves normally. However, this inspection method cannot further detect whether the opening and closing degree of the main valve is qualified, and when the thermostat cannot be opened and closed normally, the specific reason cannot be further determined, that is, it cannot be determined whether it is the spring reason, the paraffin reason, and the thermal conductivity of the metal hose. It cannot serve as an indication for the subsequent repair of defective thermostats, and it cannot serve as a prompt for the improvement of the subsequent thermostat processing technology. Therefore, a quality inspection equipment for automobile thermostat production is proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that during the thermostat detection process, the specific cause of the thermostat failure cannot be clearly identified and cannot serve as an indicator for the subsequent maintenance and improvement of the thermostat, and to propose a quality inspection equipment for automobile thermostat production.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A quality inspection device for automobile thermostat production, comprising an external controller, a rotating inspection platform, and a center column rotatably arranged at the center of the rotating inspection platform, the side wall of the rotating inspection platform is rotatably provided with a mounting slide rail for supporting, the top of the rotating inspection platform is provided with circumferentially distributed detection grooves, the top of the rotating inspection platform is provided with an indicator light at the detection groove, the inner wall of the detection groove is fixedly connected with a mounting ring, the center of the rotating inspection platform is provided with a cylindrical groove rotatably connected to the center column, and the outer side wall of the rotating inspection platform and the inner wall of the cylindrical groove are both provided with openings communicating with the detection groove;

[0007] The top of the rotating detection platform is fixedly connected with a driving gear ring, the top of the center column is equipped with a driving motor, the output end of the driving motor is fixedly connected with a driving gear meshing with the driving gear ring, the side wall of the center column is provided with a storage groove, one side of the rotating detection platform is provided with a driving box that fits with the outer side wall of the rotating detection platform, the storage groove and the driving box are both provided with a detection mechanism, one side of the driving box is provided with a water circulation mechanism, a sealing cover is provided above the rotating detection platform, a lifting cylinder is installed at the top of the center column, and the output end of the lifting cylinder is fixedly connected to the top of the sealing cover;

[0008] The detection mechanism comprises a sealing compensation plate slidably arranged in the storage slot and the driving box, respectively; a side of the sealing compensation plate is fixedly connected to a bottom support plate, a top of the bottom support plate is fixedly connected to a telescopic column, a sliding rod is slidably arranged inside the telescopic column, and a top of the sliding rod is fixedly connected to a top isolation plate;

[0009] A circular groove is formed at the top of the top isolation plate, an external photoelectric sensor is placed in the circular groove, a magnet block is fixedly connected to the bottom end of the sliding rod, an internal photoelectric sensor is arranged at the bottom end of the magnet block, and an electromagnet is arranged at the inner bottom end of the telescopic column;

[0010] The inner walls of the storage slot and the drive box are both equipped with a push cylinder, and the output end of the push cylinder is fixedly connected to the sealing compensation plate;

[0011] A timing module is arranged inside the external controller.

[0012] Preferably, a fixed gear ring is fixedly connected to the surface of the telescopic column near the bottom end, a rotating tube body is rotatably provided on the surface of the telescopic column, a steering sleeve is fixedly connected to the side wall of the rotating tube body, an electric push rod is installed inside the steering sleeve, and a paddle is fixedly connected to the top end of the electric push rod.

[0013] Preferably, a steering motor is installed at the bottom end of the steering sleeve, and an output end of the steering motor is fixedly connected to a steering gear meshing with a fixed gear ring.

[0014] Preferably, the water circulation mechanism includes an electric heating water tank, and water pumps are provided at the top end, the bottom end and the side facing the drive box of the electric heating water tank. The water pump at the top end is connected to a longitudinal telescopic hose through an upper connecting pipe, and one end of the longitudinal telescopic hose is connected to a sealing cover.

[0015] Preferably, the water pump located at the bottom end is connected to a water receiving bucket through a lower connecting pipe, and the water pump located on a side of the electric heating water tank is connected to a transverse telescopic hose, and the transverse telescopic hose is arranged through a sealing compensation plate.

[0016] Preferably, the drive motor, lifting cylinder, electric push rod, steering motor and electromagnet establish information connection with an external controller.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This scheme is equipped with a rotating inspection table, an inspection mechanism and a water circulation mechanism. The inspection mechanism cooperates with the water circulation mechanism, utilizes the principle of controlling variables, eliminates interference from other factors, injects hot water into the inspection tank in batches, and monitors whether the opening and closing distance of the main valve is qualified to judge whether the various indicators of the thermostat are qualified, thereby accurately determining the cause of the thermostat failure and serving as an indicator for the subsequent factory inspection and process improvement of defective thermostats.

[0019] 2. This solution is provided with a rotating detection table and an external controller. The thermostat to be tested is placed inside the detection slot on the rotating detection table. The rotation of the rotating detection table is automatically controlled by the external controller. The rotation of the rotating detection table is used to transport the thermostats to be tested at various locations to the detection mechanism, thereby realizing the automatic detection function of the thermostat and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a quality inspection device for automobile thermostat production proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the assembly structure of a rotating inspection table and a center column in a quality inspection device for automobile thermostat production proposed by the present invention;

[0022] Figure 3 This is a schematic cross-sectional structure diagram of a quality inspection device for automobile thermostat production proposed by the present invention;

[0023] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0024] Figure 5 This is a schematic diagram of the structure of the thermostat being inspected by the inspection mechanism in the quality inspection equipment for automobile thermostat production proposed by the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the structure of the thermostat being inspected by the inspection mechanism in the quality inspection equipment for automobile thermostat production proposed by the present invention. Figure 2 ;

[0026] Figure 7 for Figure 6 The enlarged structural diagram at B in the middle;

[0027] Figure 8The present invention provides a schematic cross-sectional structure diagram of a telescopic column in a quality inspection device for automobile thermostat production.

[0028] In the figure: 1. Rotating detection table; 101. Detection slot; 102. Opening; 2. Mounting slide rail; 3. Driving gear ring; 4. Center column; 401. Storage slot; 5. Driving motor; 6. Lifting cylinder; 7. Longitudinal telescopic hose; 8. Sealing cover; 9. Driving box; 10. Electric heating water tank; 11. Indicator light; 12. Mounting ring; 13. Pushing cylinder; 14. Water receiving bucket; 15. Sealing compensation plate; 16. Horizontal telescopic hose; 17. Bottom support plate; 18. Steering gear; 19. Steering sleeve; 20. Electric push rod; 21. Top isolation plate; 22. Telescopic column; 23. Fixed gear ring; 24. Sliding rod; 25. Paddle; 26. Steering motor; 27. Electromagnet; 28. Internal photoelectric sensor; 29. ​​Magnet block; 30. External photoelectric sensor. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example, see Figures 1 to 8A quality inspection device for automobile thermostat production, comprising a rotating inspection platform 1 and a center column 4 rotatably arranged at the center of the rotating inspection platform 1, a mounting slide rail 2 for supporting is rotatably arranged on the side wall of the rotating inspection platform 1, a circumferentially distributed inspection groove 101 is provided at the top of the rotating inspection platform 1 (a drainage port is provided at the bottom of the inspection groove 101), an indicator light 11 is provided at the top of the rotating inspection platform 1 at the inspection groove 101 (the indicator light 11 is composed of three different colors (yellow, blue and green) of lamp beads, and different colors of lamp beads are used to indicate different fault causes Because, in addition, the indicator light 11 can be turned off manually), the inner wall of the detection groove 101 is fixedly connected with a mounting ring 12 (the thermostat to be tested is placed inside the detection groove 101, and the mounting ring 12 supports the base, and then supports the thermostat to be tested), a cylindrical groove rotatably connected to the central column 4 is opened at the center of the rotating detection platform 1, and the outer wall of the rotating detection platform 1 and the inner wall of the cylindrical groove are both opened with an opening 102 connected to the detection groove 101. The setting of the opening 102 facilitates the detection mechanism to extend to the inside of the detection groove 101 to detect the thermostat to be tested;

[0032] The top of the rotating detection platform 1 is fixedly connected with a driving gear ring 3, the top of the central column 4 is installed with a driving motor 5, and the output end of the driving motor 5 is fixedly connected with a driving gear meshing with the driving gear ring 3;

[0033] It should be noted that: the driving motor 5 drives the driving gear at its output end to rotate intermittently, the driving gear drives the driving gear ring 3 to rotate intermittently, and the driving gear ring 3 drives the rotating detection platform 1 to rotate intermittently, so as to realize the intermittent rotation of the thermostat to be tested, and transport the thermostat to be tested to the detection mechanism in turn, so as to realize the automatic detection function of the thermostat and improve the detection efficiency.

[0034] A storage groove 401 is provided on the side wall of the central column 4, a driving box 9 is provided on one side of the rotating detection platform 1 and is fitted with an outer wall of the rotating detection platform 1, and detection mechanisms are provided inside the storage groove 401 and the driving box 9, a sealing cover 8 is provided above the rotating detection platform 1, and a lifting cylinder 6 is installed on the top of the central column 4, and the output end of the lifting cylinder 6 is fixedly connected to the top of the sealing cover 8;

[0035] Further, the detection mechanism includes a sealing compensation plate 15 slidably arranged in the storage groove 401 and the driving box 9, respectively, a side of the sealing compensation plate 15 is fixedly connected to a bottom support plate 17, the top of the bottom support plate 17 is fixedly connected to a telescopic column 22, a sliding rod 24 is slidably arranged inside the telescopic column 22, and the top of the sliding rod 24 is fixedly connected to a top isolation plate 21, further, a circular groove is opened at the top of the top isolation plate 21, an external photoelectric sensor 30 is placed in the circular groove, a magnet block 29 is fixedly connected to the bottom end of the sliding rod 24, an internal photoelectric sensor 28 is arranged at the bottom end of the magnet block 29, and an electromagnet 27 is arranged at the inner bottom end of the telescopic column 22;

[0036] Further, a fixed gear ring 23 is fixedly connected to the surface of the telescopic column 22 near the bottom end, a rotating tube body is rotatably arranged on the surface of the telescopic column 22, a steering sleeve 19 is fixedly connected to the side wall of the rotating tube body, an electric push rod 20 is installed inside the steering sleeve 19, a paddle 25 is fixedly connected to the top of the electric push rod 20, a steering motor 26 is installed at the bottom end of the steering sleeve 19, and a steering gear 18 meshing with the fixed gear ring 23 is fixedly connected to the output end of the steering motor 26; a pushing cylinder 13 is installed on the inner wall of the storage groove 401 and the drive box 9, and the output end of the pushing cylinder 13 is fixedly connected to the sealing compensation plate 15;

[0037] It should be noted that: the push cylinder 13 drives the sealing compensation plate 15 and then drives the detection mechanism to move, so as to push the detection mechanism into the detection groove 101, until the sealing compensation plate 15 moves to the inside of the opening 102 on the side wall of the rotating detection platform 1, thereby realizing the blocking function of the opening 102;

[0038] It should be noted that: when the detection mechanism moves into the detection slot 101, the top isolation plate 21 is about to contact the metal hose inside the thermostat (the time for the detection mechanism to be pushed into the detection slot 101 is calculated by the timing module inside the external controller, and the electric push rod 20 is controlled to work within the countdown of a few seconds), the external controller controls the electric push rod 20 to work, and the electric push rod 20 drives the paddle 25 to move downward, so that the return spring is compressed, and then the top of the return spring moves downward, so that the top isolation plate 21 is stuck in the metal hose inside the thermostat. The steering motor 26 rotates on the surface of the tube, and then the external controller controls the steering motor 26 to work. The steering motor 26 drives the steering gear 18 at its output end to rotate. Under the action of the fixed gear ring 23, the steering gear 18 rolls along the fixed gear ring 23, thereby driving the steering sleeve 19 to rotate. The steering sleeve 19 drives the electric push rod 20 and the paddle 25 to make a circular motion around the telescopic column 22, so that the paddle 25 is away from the return spring. Under the action of the return spring elastic force, the return spring is reset. At this time, the top end of the return spring contacts the bottom end of the top isolation plate 21.

[0039] It is worth noting that: the top isolation plate 21 is a semi-ring structure, the top isolation plates 21 on both sides are spliced ​​together to form a complete circular ring structure and are stuck on the surface of the metal hose inside the thermostat, and the bottom support plate 17 is a semi-ring structure, and the bottom support plates 17 on both sides are sleeved on the surface of the return spring.

[0040] It should be noted that: after the electromagnet 27 is energized, it generates magnetic force and magnetically attracts the magnet block 29, causing the sliding rod 24 to move downward, thereby driving the top isolation plate 21 at its top to move downward, and the top isolation plate 21 presses down the return spring, thereby eliminating the influence of the return spring. The expansion temperature of paraffin and the thermal conductivity rate of the metal hose are tested separately to see if they are qualified. The test results are divided into the following four preliminary results:

[0041] Preliminary result 1: When hot water of a specified temperature is introduced into the detection tank 101, the paraffin inside the metal hose melts and expands due to the heat and pushes the metal hose to move. The metal hose drives the main valve to move downward, so that the thermostat opens. When the main valve moves downward, the external photoelectric sensor 30 on the top isolation plate 21 can measure the downward movement distance of the main valve, and the timing module inside the control module performs timing. If the downward movement distance of the main valve is the same as the standard distance within the specified time, it means that the expansion rate of the paraffin and the thermal conductivity rate of the metal hose are normal, and the indicator light 11 does not light up at this time;

[0042] Preliminary result 2: If the downward movement distance of the main valve does not reach the standard within the specified time, and the downward movement distance of the main valve reaches the standard within the subsequent time, it means that there is no problem with the expansion rate of the paraffin wax, but there is a problem with the thermal conductivity of the metal hose. The external controller controls the blue lamp bead on the indicator light 11 to light up, and the external photoelectric sensor 30 sends the final downward movement distance of the main valve to the external controller for recording;

[0043] Preliminary result three: If the downward movement distance of the main valve does not reach the standard within the specified time, and the main valve stops moving within the specified time, it means that there is a problem with the expansion rate of the paraffin, but there is no problem with the thermal conductivity of the metal hose (because the paraffin has finished expanding within the specified time, indicating that the thermal conductivity of the metal hose is normal). At this time, the external controller controls the green lamp bead in the indicator light 11 to light up, and the external photoelectric sensor 30 sends the final downward movement distance of the main valve to the external controller for recording;

[0044] Preliminary result 4: If the downward movement distance of the main valve does not reach the standard within the specified time, and the main valve is still moving after exceeding the specified time, and the downward movement distance still does not reach the standard when it finally stops moving, it means that there are problems with the thermal conductivity of the metal hose and the expansion rate of the paraffin. At this time, the external controller controls the blue and green lamp beads of the indicator light 11 to light up at the same time, and the external photoelectric sensor 30 sends the final downward movement distance of the main valve to the external controller for recording;

[0045] It should be noted that: after the tests of the thermal conductivity of the metal hose and the expansion rate of the paraffin are completed, the hot water in the heating water tank is drained and cold water is injected, and cold water is injected into the detection tank 101, so that the paraffin is quickly cooled and reset. Then the external controller turns off the electromagnet 27, and the electromagnet 27 loses its magnetism and no longer magnetically attracts the magnet block 29. Under the elastic force of the return spring itself, the return spring drives the top isolation plate 21 to reset, and at the same time drives the main valve to reset;

[0046] Then, the cold water is drained and the previously drained hot water is injected into the electric heating water tank 10 again. The injected hot water is heated to a specified temperature (the previous test lowered the hot water temperature) by using the electric heating rod inside the electric heating water tank 10. Then, the water pump is used to inject hot water into the test tank 101 to test whether the elastic force of the return spring is normal. The test results are divided into the following three final results:

[0047] Final result 1: Based on the above preliminary result 1, if the downward movement distance of the main valve does not reach the standard within the specified time (the downward movement distance is measured by the internal photoelectric sensor 28 at the bottom of the magnet block 29), it means that the elastic force of the return spring is too large, which hinders the normal expansion of the paraffin; otherwise, it means that the elastic force of the return spring is normal;

[0048] Final result 2: Based on the above preliminary result 2, if the downward movement distance of the main valve does not reach the standard within the final time, it means that the elastic force of the return spring is too large, which hinders the normal expansion of the paraffin; otherwise, it means that the elastic force of the return spring is normal;

[0049] Final result 3: Based on the above preliminary results 3 and 4, if the downward movement distance of the main valve is less than the final value recorded within the final time, it means that the elastic force of the return spring is too large, which hinders the expansion of the paraffin; otherwise, it means that the elastic force of the return spring is normal;

[0050] Among the above three final results, if the elastic force of the return spring is too large, the external controller controls the red lamp bead in the indicator light 11 to emit light.

[0051] A water circulation mechanism is provided on one side of the driving box 9. Furthermore, the water circulation mechanism includes an electric heating water tank 10. Water pumps are provided at the top, bottom and side of the electric heating water tank 10 facing the driving box 9. The water pump at the top is connected to the longitudinal telescopic hose 7 through an upper connecting pipe. One end of the longitudinal telescopic hose 7 is connected to the sealing cover 8. Further, the water pump at the bottom is connected to the water receiving bucket 14 through a lower connecting pipe. The water pump located on one side of the electric heating water tank 10 is connected to a transverse telescopic hose 16. The transverse telescopic hose 16 is arranged through the sealing compensation plate 15.

[0052] It should be noted that the water pump arranged on one side of the electric heating water tank 10 is used to transport the hot water or cold water in the electric heating water tank 10 to the detection tank 101 through the transverse telescopic hose 16, and the water pumps at the top and bottom of the electric heating water tank 10 are used to extract the hot water or cold water in the detection tank 101 and transport it back to the electric heating water tank 10 to realize water circulation.

[0053] It is worth noting that: before the main valve is opened, the hot water or cold water entering the detection tank 101 is discharged to the water receiving bucket 14 through the drain port at the bottom of the detection tank 101, and enters the lower connecting pipe, and is pumped back into the motor heating box under the action of the water pump at the bottom of the drive box 9. After the main valve is opened, cold water or hot water will enter the sealing cover 8, and be pumped back into the electric heating water tank 10 under the action of the water pump at the top of the drive box 9.

[0054] Furthermore, the driving motor 5, the lifting cylinder 6, the electric push rod 20, the steering motor 26 and the electromagnet 27 establish information connection with the external controller, and a timing module is provided inside the external controller.

[0055] When the present invention is used, the electric heating water tank 10 is first turned on to heat the cold water inside the electric heating water tank 10 to a specified temperature, and then the driving motor 5 is turned on. The driving motor 5 drives the driving gear at its output end to rotate intermittently, and the driving gear drives the driving gear ring 3 to rotate intermittently, and the driving gear ring 3 drives the rotating detection platform 1 to rotate intermittently. During the rotation of the rotating detection platform 1, the detection personnel are required to place the thermostat to be tested inside the detection slot 101 to realize the intermittent rotation of the thermostat to be tested, and the thermostat to be tested is transported to the detection mechanism in turn, so as to realize the automatic detection function of the thermostat and improve the detection efficiency.

[0056] When the thermostat rotates to the detection mechanism along with the rotating detection platform 1, the external controller controls the lifting cylinder 6 to work, so that the sealing cover 8 moves down and squeezes the thermostat base, and cooperates with the mounting ring 12 in the detection groove 101 to realize the installation function of the thermostat. Then the external controller controls the pushing cylinder 13 to work, and the output end of the pushing cylinder 13 pushes the sealing compensation plate 15 to move, and the sealing compensation plate 15 drives the detection mechanism to move, and pushes the detection mechanism into the detection groove 101 until the sealing compensation plate 15 blocks the opening 102. During this process, when the top isolation plate 21 is about to contact the metal hose inside the thermostat (the time for the detection mechanism to be pushed into the detection groove 101 is calculated by the timing module inside the external controller, and the electric push rod 20 is controlled to work within a few seconds of the countdown). ), the external controller controls the electric push rod 20 to work, the electric push rod 20 drives the paddle 25 to move downward, so that the return spring is compressed, and then the top of the return spring moves downward, so that the top isolation plate 21 is stuck on the surface of the metal hose inside the thermostat. After that, the external controller controls the steering motor 26 to work, and the steering motor 26 drives the steering gear 18 at its output end to rotate. Under the action of the fixed gear ring 23, the steering gear 18 rolls along the fixed gear ring 23, and then drives the steering sleeve 19 to rotate. The steering sleeve 19 drives the electric push rod 20 and the paddle 25 to make a circular motion around the telescopic column 22, so that the paddle 25 is away from the return spring. Under the action of the elastic force of the return spring, the return spring is reset. At this time, the top of the return spring contacts the bottom end of the top isolation plate 21;

[0057] Then the external controller controls the electromagnet 27 to generate magnetism and attract the magnet block 29, so that the sliding rod 24 moves downward, thereby driving the top isolation plate 21 at its top to move downward, and the top isolation plate 21 presses down the return spring, thereby eliminating the influence of the return spring. The expansion temperature of paraffin and the thermal conductivity rate of the metal hose are tested separately to see if they are qualified. The test results are divided into the following four preliminary results:

[0058] Preliminary result 1: When hot water of a specified temperature is introduced into the detection tank 101, the paraffin inside the metal hose melts and expands due to the heat and pushes the metal hose to move. The metal hose drives the main valve to move downward, so that the thermostat opens. When the main valve moves downward, the external photoelectric sensor 30 on the top isolation plate 21 can measure the downward movement distance of the main valve, and the timing module inside the control module performs timing. If the downward movement distance of the main valve is the same as the standard distance within the specified time, it means that the expansion rate of the paraffin and the thermal conductivity rate of the metal hose are normal, and the indicator light 11 does not light up at this time;

[0059] Preliminary result 2: If the downward movement distance of the main valve does not reach the standard within the specified time, and the downward movement distance of the main valve reaches the standard within the subsequent time, it means that there is no problem with the expansion rate of the paraffin wax, but there is a problem with the thermal conductivity of the metal hose. The external controller controls the blue lamp bead on the indicator light 11 to light up, and the external photoelectric sensor 30 sends the final downward movement distance of the main valve to the external controller for recording;

[0060] Preliminary result three: If the downward movement distance of the main valve does not reach the standard within the specified time, and the main valve stops moving within the specified time, it means that there is a problem with the expansion rate of the paraffin, but there is no problem with the thermal conductivity of the metal hose (because the paraffin has finished expanding within the specified time, indicating that the thermal conductivity of the metal hose is normal). At this time, the external controller controls the green lamp bead in the indicator light 11 to light up, and the external photoelectric sensor 30 sends the final downward movement distance of the main valve to the external controller for recording;

[0061] Preliminary result 4: If the downward movement distance of the main valve does not reach the standard within the specified time, and the main valve is still moving after exceeding the specified time, and the downward movement distance still does not reach the standard when it finally stops moving, it means that there are problems with the thermal conductivity of the metal hose and the expansion rate of the paraffin. At this time, the external controller controls the blue and green lamp beads of the indicator light 11 to light up at the same time, and the external photoelectric sensor 30 sends the final downward movement distance of the main valve to the external controller for recording;

[0062] After the test of the heat conductivity of the metal hose and the expansion rate of the paraffin is completed, the hot water in the heating water tank is drained and cold water is injected, and cold water is injected into the detection tank 101, so that the paraffin is quickly cooled and reset. Then the external controller turns off the electromagnet 27, and the electromagnet 27 loses its magnetism and no longer magnetically attracts the magnet block 29. Under the elastic force of the return spring itself, the return spring drives the top isolation plate 21 to reset, and at the same time drives the main valve to reset;

[0063] Then the cold water is drained, and the previously drained hot water is injected into the electric heating water tank 10 again. The injected hot water is heated to a specified temperature by the electric heating rod inside the electric heating water tank 10 (the previous test lowered the hot water temperature), and then the water pump is used to inject hot water into the test tank 101 to test whether the elastic force of the return spring is normal. The test results are divided into the following three final results:

[0064] Final result 1: Based on the above preliminary result 1, if the downward movement distance of the main valve does not reach the standard within the specified time (the downward movement distance is measured by the internal photoelectric sensor 28 at the bottom of the magnet block 29), it means that the elastic force of the return spring is too large, which hinders the normal expansion of the paraffin; otherwise, it means that the elastic force of the return spring is normal;

[0065] Final result 2: Based on the above preliminary result 2, if the downward movement distance of the main valve does not reach the standard within the final time, it means that the elastic force of the return spring is too large, which hinders the normal expansion of the paraffin; otherwise, it means that the elastic force of the return spring is normal;

[0066] Final result 3: Based on the above preliminary results 3 and 4, if the downward movement distance of the main valve is less than the final value recorded within the final time, it means that the elastic force of the return spring is too large, which hinders the expansion of the paraffin; otherwise, it means that the elastic force of the return spring is normal;

[0067] Among the above three final results, if the return spring force is too large, the external controller controls the red lamp bead in the indicator light 11 to light up. After the return spring force test is completed, the external controller controls the push cylinder 13 to work, driving the sealing compensation plate 15 and the detection mechanism to reset, and at the same time controls the lifting cylinder 6 to work, so that the sealing cover 8 is reset. Subsequently, the external controller controls the drive motor 5 to continue working, so that the rotating detection table 1 continues to rotate, so that the next thermostat to be tested moves to the detection mechanism, and the above operations are repeated to complete the automatic detection function of all thermostats to be tested, and at the same time accurately give the cause of the thermostat failure, which is convenient for the subsequent return of the thermostat to the factory for inspection and optimization of the processing technology.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A quality inspection device for automobile thermostat production, comprising an external controller, a rotating inspection platform (1), and a center column (4) rotatably arranged at the center of the rotating inspection platform (1), characterized in that: The side wall of the rotary detection platform (1) is rotatably provided with a mounting slide rail (2) for supporting the detection, the top of the rotary detection platform (1) is provided with circumferentially distributed detection grooves (101), the top of the rotary detection platform (1) is provided with an indicator light (11) located at the detection groove (101), the inner wall of the detection groove (101) is fixedly connected with a mounting ring (12), the center of the rotary detection platform (1) is provided with a cylindrical groove rotatably connected to the center column (4), and the outer wall of the rotary detection platform (1) and the inner wall of the cylindrical groove are both provided with openings (102) communicating with the detection groove (101); The top of the rotary detection platform (1) is fixedly connected to a driving gear ring (3), the top of the central column (4) is equipped with a driving motor (5), the output end of the driving motor (5) is fixedly connected to a driving gear meshing with the driving gear ring (3), the side wall of the central column (4) is provided with a storage groove (401), one side of the rotary detection platform (1) is provided with a driving box (9) that is in contact with the outer wall of the rotary detection platform (1), the storage groove (401) and the driving box (9) are both provided with a detection mechanism, one side of the driving box (9) is provided with a water circulation mechanism, a sealing cover (8) is provided above the rotary detection platform (1), a lifting cylinder (6) is installed at the top of the central column (4), and the output end of the lifting cylinder (6) is fixedly connected to the top of the sealing cover (8); The detection mechanism comprises a sealing compensation plate (15) slidably arranged in the storage groove (401) and the inside of the driving box (9), respectively; a side surface of the sealing compensation plate (15) is fixedly connected to a bottom support plate (17); a top end of the bottom support plate (17) is fixedly connected to a telescopic column (22); a sliding rod (24) is slidably arranged inside the telescopic column (22); and a top end of the sliding rod (24) is fixedly connected to a top isolation plate (21); A circular groove is formed at the top of the top isolation plate (21), an external photoelectric sensor (30) is placed in the circular groove, a magnet block (29) is fixedly connected to the bottom end of the sliding rod (24), an internal photoelectric sensor (28) is arranged at the bottom end of the magnet block (29), and an electromagnet (27) is arranged at the inner bottom end of the telescopic column (22); The inner walls of the storage groove (401) and the drive box (9) are both installed with a pushing cylinder (13), and the output end of the pushing cylinder (13) is fixedly connected to the sealing compensation plate (15); A timing module is arranged inside the external controller.

2. The quality inspection equipment for automobile thermostat production according to claim 1, characterized in that: A fixed gear ring (23) is fixedly connected to the surface of the telescopic column (22) near the bottom end, a rotating tube body is rotatably arranged on the surface of the telescopic column (22), a steering sleeve (19) is fixedly connected to the side wall of the rotating tube body, an electric push rod (20) is installed inside the steering sleeve (19), and a paddle (25) is fixedly connected to the top end of the electric push rod (20).

3. The quality inspection equipment for automobile thermostat production according to claim 2, characterized in that: A steering motor (26) is installed at the bottom end of the steering sleeve (19), and an output end of the steering motor (26) is fixedly connected to a steering gear (18) meshing with a fixed gear ring (23).

4. The quality inspection equipment for automobile thermostat production according to claim 1, characterized in that: The water circulation mechanism comprises an electric heating water tank (10), and water pumps are arranged at the top end, the bottom end and a side surface facing the drive box (9) of the electric heating water tank (10). The water pump at the top end is connected to a longitudinal telescopic hose (7) via an upper connecting pipe, and one end of the longitudinal telescopic hose (7) is connected to a sealing cover (8).

5. The quality inspection equipment for automobile thermostat production according to claim 4, characterized in that: The water pump at the bottom is connected to a water receiving bucket (14) via a lower connecting pipe, and the water pump at a side of the electric heating water tank (10) is connected to a transverse telescopic hose (16), and the transverse telescopic hose (16) is arranged to penetrate the sealing compensation plate (15).

6. The quality inspection equipment for automobile thermostat production according to claim 1, characterized in that: The drive motor (5), the lifting cylinder (6), the electric push rod (20), the steering motor (26) and the electromagnet (27) establish information connection with an external controller.

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