A cold and hot ceramic valve core air tightness detection equipment

Abstract

The utility model proposes a kind of cold and hot ceramic valve core air tightness detection equipment, it is related to detection equipment technical field, including the lever rotary seat, the one end of lever rotary seat is fixedly installed with lever control rod, the one end of lever control rod is engaged with the valve core that carries out air tightness detection, the lower of valve core is provided with the jig base that carries out support.The utility model has the advantages of: setting the lever control rod and lever rotary seat that can adjust valve core, and using up and down compression fixed plate to drive lever control rod and lever rotary seat to move, the position adjustment of valve core lever by lever control rod and lever rotary seat realizes the adjustment of the inside flow state of valve core, it is convenient to detect the air tightness of different flow state in valve core inside, and according to the data of detection control up and down compression fixed plate to move, it is convenient to detect and dismount the air tightness of valve core quickly, improve the convenience of valve core air tightness detection.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a device for testing the airtightness of hot and cold ceramic valve cores. Background Technology

[0002] The high tensile strength, resistance to deformation, high and low temperature resistance, wear resistance, and non-corrosion properties of ceramic materials determine their excellent sealing performance. Ceramic valve cores are used in valves and have excellent corrosion resistance and high weather resistance. However, during the manufacturing process, leakage may occur in some valve cores due to process or design reasons. Therefore, testing equipment is usually used to test the airtightness of ceramic valve cores.

[0003] However, existing ceramic valve core airtightness testing equipment is not convenient for quickly judging the airtightness test results, which is not conducive to accurate and rapid testing of the airtightness of ceramic valve cores, resulting in low testing efficiency. Utility Model Content

[0004] Therefore, the purpose of this utility model is to propose a device for testing the airtightness of hot and cold ceramic valve cores, so as to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, one embodiment of this utility model provides a device for testing the airtightness of hot and cold ceramic valve cores, including a support test bracket. A lifting and lowering clamping plate is fixedly installed at the top of the test bracket. A rotational drive assembly is fixedly installed inside the upper and lower clamping plates. A torque-transmitting lever rotating seat is fixedly installed at the output end of the torque drive assembly. A lever control rod for opening and closing the lever is fixedly installed at one end of the lever rotating seat. A valve core for airtightness testing is engaged at one end of the lever control rod. The valve core is supported by a fixture base. The valve core includes a valve core fixing seat, a valve core handle for opening and closing the valve, and a water guide end cap for controlling the water flow direction. The valve core fixing seat is fixedly installed on the top of the fixture base. The top of the valve core fixing seat is rotatably connected to the valve core handle that engages with the lever control rod. The bottom of the valve core fixing seat is fixedly installed with a water guide end cap located inside the fixture base. The water guide end cap has an outlet port, a hot water port, and a cold water port inside. The fixture base is equipped with a detection sensor for airtightness detection.

[0006] Preferably, one end of the top of the test bracket is provided with an air source triplet, which is signal-connected to a central control unit for signal processing and automated control. The central control unit is signal-connected to the upper and lower clamping plates, the torsion transmission assembly, and the lever rotation seat.

[0007] The above technical solution is adopted: the test bracket is fixed to the ground with anchor bolts, and the top air source triple unit filters and regulates the pressure of compressed air to provide a clean air source for pneumatic components. The air source triple unit is connected to the central control unit (PLC) via air pipes. The central control unit monitors the air pressure value in real time and adjusts the output pressure to ensure the stable operation of the pneumatic actuator.

[0008] Preferably, in any of the above solutions, the upper and lower clamping fixing plate includes upper and lower clamping cylinders connected to the central control unit signal and a lifting fixing seat for support and fixing. The upper and lower clamping cylinders are fixedly installed on the top of the test bracket, and the lifting fixing seat is fixedly installed at the output end of the upper and lower clamping cylinders. Guide rods that are fixedly installed with the test bracket are inserted into the four corners of the lifting fixing seat.

[0009] The above technical solution is adopted: the upper and lower clamping cylinders are driven by the central control unit and push the lifting and fixing seat to move vertically along the four guide rods through the piston rod. The guide rods are interference-fitted with the test bracket. When the lifting and fixing seat is pressed down, it applies a clamping force to the valve core to ensure that there is no leakage on the sealing surface during the test.

[0010] Preferably, in any of the above embodiments, the torsional transmission assembly includes a stepper motor connected to the central control unit, a gear transmission belt assembly for mechanical transmission, and a drive rod for transmitting power. The stepper motor is fixedly installed at one end of the lifting and fixing seat. The output end of the stepper motor is fixedly installed with the gear transmission belt assembly located inside the lifting and fixing seat. One end of the gear transmission belt assembly is fixedly installed with a drive rod that rotates inside the lifting and fixing seat. One end of the drive rod is engaged with a lever rotating seat that rotates inside the lifting and fixing seat.

[0011] The above technical solution is adopted: the stepper motor is fixed to the side of the lifting fixed seat, and the gear transmission and belt transmission are realized through the polyurethane gear transmission belt assembly, which in turn drives the drive rod to rotate. The drive rod is engaged with the lever rotation seat to realize the angle adjustment of the valve core handle rod to meet the angle requirements of switching between hot and cold ends.

[0012] Preferably, in any of the above embodiments, the lever control lever includes a lever control cylinder connected to the central control unit, a lever tooth plate for transmission, a lever gear for mechanical transmission, and a lever block for controlling the lever. The lever control cylinder is fixedly installed on the top of the control connector. The lever tooth plate is fixedly installed at the output end of the lever control cylinder. The lever gear meshes with the lower part of the lever tooth plate. A connecting shaft is provided in the middle of the lever to support it. The lever block, which rotates inside the control connector, is fixedly installed on the lever through the connecting shaft. The lever block engages with the valve core handle lever.

[0013] The above technical solution is adopted: the lever control cylinder is installed at the top of the control connector. The piston rod pushes the lever tooth plate to make linear motion, meshes with the lever gear to rotate, drives the lever block to rotate, and the lever block engages with the valve core handle rod to realize the opening and closing control of the valve core and ensure the precise switching of the valve core's on / off state.

[0014] Preferably, in any of the above embodiments, the valve core fixing seat has a valve core body that is fixedly installed with the valve core handle, and the water guide end cap is located below the valve core body.

[0015] The above technical solution is adopted: the valve core fixing seat is sealed to the fixture base by bolts, the valve core handle is clearance-fitted with the fixing seat and can rotate around the axis, and the water guide end cover is provided with water outlet port, hot water port and cold water port. When the handle is rotated, the water guide end cover switches the air passage on and off synchronously, and the air tightness test of different ports is realized in conjunction with the fixture base.

[0016] Preferably, in any of the above embodiments, the fixture base has a cavity for conduction, and the two ends of the cavity have guide holes for connection with external devices, and the detection sensor is connected to the central control unit.

[0017] The above technical solution is adopted: a cavity is opened inside the fixture base, and the two end guide holes are connected to the leak tester through air pipes. The detection sensor monitors the change of air pressure in the cavity in real time. When the valve core is not sealed properly, the air pressure decay rate exceeds the preset value. The sensor transmits the signal to the central control unit. The central control unit compares the standard leak test data, determines the test result, and controls the alarm device.

[0018] The operator places the valve core on the fixture base, presses the dual start button, and the central control unit controls the upper and lower clamping cylinders to press down, the lifting and fixing seat presses the valve core fixing seat, the stepper motor drives the valve core handle to the closed state, the lever controls the cylinder to push the toggle block, opening the valve core to the test position, the air source triple unit fills the water outlet port with compressed air, the detection sensor monitors the air pressure decay, the stepper motor rotates the handle to the hot water end, and the test is repeated, the cold water end is tested in the same way, the central control unit summarizes the data, if qualified, the cylinder is controlled to lift, if unqualified, an alarm is sounded and locked, the clamping force of the lifting and fixing seat is adjusted by the cylinder to adapt to different specifications of valve cores, the locking groove of the toggle block adopts a detachable design to accept the time of tooling change, the guide hole of the fixture base adopts a quick plug interface, which facilitates the maintenance of external equipment.

[0019] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0020] 1. A lever control rod and lever rotation seat are provided for adjusting the valve core. The lever control rod and lever rotation seat are driven to move by upper and lower clamping plates. The position of the valve core lever is adjusted by the lever control rod and lever rotation seat to adjust the internal flow state of the valve core. This facilitates the detection of airtightness under different flow states inside the valve core. The upper and lower clamping plates are controlled to move based on the detection data, which facilitates quick airtightness detection and disassembly of the valve core, improving the convenience of valve core airtightness detection.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of the structure according to an embodiment of the present utility model;

[0024] Figure 2 This is a partial structural schematic diagram according to an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the torsion transmission assembly according to an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the lever control rod according to an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the valve core according to an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the fixture base according to an embodiment of the present utility model;

[0029] Figure 7 This is a side sectional view of the valve core according to an embodiment of the present utility model;

[0030] Figure 8 This is a cross-sectional structural diagram of the valve core according to an embodiment of the present utility model;

[0031] Figure 9 This is a schematic diagram of the electrical distribution structure during the inflation stage according to an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the electrical distribution structure during the testing phase according to an embodiment of the present invention;

[0033] Figure 11This is a schematic diagram of the electrical distribution structure during the stable phase according to an embodiment of the present invention;

[0034] Figure 12 This is a schematic diagram of the electrical distribution structure during the exhaust stage according to an embodiment of the present invention;

[0035] The components are: 1-Test bracket, 2-Upper and lower clamping fixing plate, 21-Upper and lower clamping cylinder, 22-Lifting fixing seat, 3-Torsion transmission assembly, 31-Stepper motor, 32-Gear transmission belt assembly, 33-Drive rod, 4-Toggle rotating seat, 5-Toggle control rod, 51-Toggle control cylinder, 52-Toggle tooth plate, 53-Toggle gear, 54-Toggle block, 6-Valve core, 61-Valve core fixing seat, 62-Valve core handle, 63-Water guide end cap, 7-Jig base. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0037] like Figure 1-8 As shown, an embodiment of the present invention provides a device for testing the airtightness of a hot and cold ceramic valve core. It includes a test bracket 1 for support, with a lifting and lowering drive upper and lower clamping plates 2 fixedly installed at the top of the test bracket 1. A torsion transmission assembly 3 for rotation drive is fixedly installed inside the upper and lower clamping plates 2. A torque-transmitting lever rotating seat 4 is fixedly installed at the output end of the torsion transmission assembly 3. A lever control rod 5 for opening and closing the lever is fixedly installed at one end of the lever rotating seat 4. A valve core 6 for airtightness testing is engaged at one end of the lever control rod 5. An inlet valve is located below the valve core 6. The fixture base 7 is supported by a valve core 6, which includes a valve core fixing seat 61 for support, a valve core handle 62 for opening and closing the valve, and a water guide end cap 63 for controlling the direction of water flow. The valve core fixing seat 61 is fixedly installed on the top of the fixture base 7. The top of the valve core fixing seat 61 is rotatably connected to the valve core handle 62, which engages with the lever control rod 5. The bottom of the valve core fixing seat 61 is fixedly installed with a water guide end cap 63 located inside the fixture base 7. The water guide end cap 63 has an outlet port, a hot water port, and a cold water port inside. The fixture base 7 is equipped with a detection sensor for airtightness detection.

[0038] Preferably, one end of the top of the test bracket 1 is provided with an air source triplet, which is signal-connected to a central control unit for signal processing and automatic control. The central control unit is signal-connected to the upper and lower clamping fixing plates 2, the torsion transmission assembly 3, and the lever rotation seat 4.

[0039] The above technical solution is adopted: the test bracket 1 is fixed to the ground with anchor bolts, and the top air source triple unit filters and regulates the pressure of compressed air to provide a clean air source for pneumatic components. The air source triple unit is connected to the central control unit (PLC) via air pipes. The central control unit monitors the air pressure value in real time and adjusts the output pressure to ensure the stable operation of the pneumatic actuator.

[0040] Preferably, the upper and lower clamping fixing plate 2 includes an upper and lower clamping cylinder 21 connected to the central control unit signal and a lifting fixing seat 22 for support and fixing. The upper and lower clamping cylinder 21 is fixedly installed on the top of the test bracket 1, and the lifting fixing seat 22 is fixedly installed on the output end of the upper and lower clamping cylinder 21. Guide rods that are fixedly installed on the test bracket 1 are inserted into the four corners of the lifting fixing seat 22.

[0041] The above technical solution is adopted: the upper and lower clamping cylinders 21 are driven by the central control unit and push the lifting fixed seat 22 to move vertically along the four guide rods through the piston rod. The guide rods are interference-fitted with the test bracket 1. When the lifting fixed seat 22 is pressed down, it applies a clamping force to the valve core 6 to ensure that there is no leakage on the sealing surface during the test.

[0042] Preferably, in any of the above embodiments, the torsional transmission assembly 3 includes a stepper motor 31 connected to the central control unit signal, a gear transmission belt assembly 32 for mechanical transmission, and a drive rod 33 for power transmission. The stepper motor 31 is fixedly installed at one end of the lifting fixed base 22. The output end of the stepper motor 31 is fixedly installed with the gear transmission belt assembly 32 located inside the lifting fixed base 22. One end of the gear transmission belt assembly 32 is fixedly installed with the drive rod 33 that rotates inside the lifting fixed base 22. One end of the drive rod 33 is engaged with a lever rotating seat 4 that rotates inside the lifting fixed base 22.

[0043] The above technical solution is adopted: the stepper motor 31 is fixed on the side of the lifting fixed seat 22, and the gear transmission and belt transmission are realized through the polyurethane gear transmission belt assembly 32, which in turn drives the drive rod 33 to rotate. The drive rod 33 is engaged with the lever rotating seat 4 to realize the angle adjustment of the valve core handle rod 62 to meet the angle requirements of switching between hot and cold ends.

[0044] Preferably, in any of the above embodiments, the lever control lever 5 includes a lever control cylinder 51 connected to the central control unit, a lever tooth plate 52 for transmission, a lever gear 53 for mechanical transmission, and a lever block 54 for controlling the lever. The lever control cylinder 51 is fixedly installed on the top of the control connector 8. The lever tooth plate 52 is fixedly installed at the output end of the lever control cylinder 51. The lever gear 53 is meshed below the lever tooth plate 52. A connecting shaft is provided in the middle of the lever gear 53 to support it. The lever block 54, which rotates inside the control connector 8, is fixedly installed on the lever 53 through the connecting shaft. The lever block 54 engages with the valve core handle lever 62.

[0045] The above technical solution is adopted: the lever control cylinder 51 is installed on the top of the control connector 8, the piston rod pushes the actuating tooth plate 52 to move linearly, meshes with the actuating gear 53 to rotate, drives the actuating block 54 to rotate, and the actuating block 54 engages with the valve core handle rod 62 to realize the opening and closing control of the valve core and ensure the precise switching of the valve core's opening and closing state.

[0046] Preferably, in any of the above solutions, the valve core fixing seat 61 has a valve core body that is fixedly installed with the valve core handle 62 inside, and the water guide end cap 63 is located below the valve core body.

[0047] The above technical solution is adopted: the valve core fixing seat 61 is sealed to the fixture base 7 by bolts, the valve core handle 62 is clearance-fitted with the fixing seat 61 and can rotate around the axis, and the water guide end cover 63 has a water outlet port, a hot water port and a cold water port inside. When the handle 62 is rotated, the water guide end cover 63 synchronously switches the air passage on and off, and cooperates with the fixture base 7 to realize the air tightness test of different ports.

[0048] Preferably, in any of the above solutions, the fixture base 7 has a cavity for conduction inside, and the two ends of the cavity have guide holes for connecting to external devices, and the detection sensor and the central control unit are connected by signal.

[0049] The above technical solution is adopted: a cavity is opened inside the fixture base 7, and the two end guide holes are connected to the leak tester through air pipes. The detection sensor monitors the change of air pressure in the cavity in real time. When the valve core 6 is not sealed properly, the air pressure decay rate exceeds the preset value. The sensor transmits the signal to the central control unit. The central control unit compares the standard leak test data, determines the test result, and controls the alarm device.

[0050] With the valve handle in the closed position, turn the handle to hot water and then control the lever from the hot water end to the cold water end (if the timing allows, you can then turn it back from the cold water end to the hot water end). Measure the airtightness of the water end during the time the handle is rotated to detect the overall leakage of the valve core. Rotate the valve core to the hot / cold end and the center position respectively, and then slowly open the valve core to test for leakage during the opening process. The lever rotation and opening speed are set by parameters.

[0051] With the valve handle open, turn the handle to the fully open position on the hot water side and check the airtightness of the cold water side to detect whether the cold water side is leaking to the outlet or the hot water side.

[0052] With the valve handle open, turn the handle to the fully open position on the cold water side. By testing the airtightness of the hot water side, check whether there is any leakage from the hot water side to the outlet or the cold water side.

[0053] like Figure 9As shown, when the test piece [TP] is connected to the test port, the test program will start to perform the test. During the inflation phase, after the internal solenoid valves [V1] and [V2] are opened, the gas pressure through the pressure regulating valve [R] is injected into the test piece.

[0054] like Figure 10 As shown, after the inflation phase, solenoid valve [V2] closes, isolating the injected gas inside the test piece. Immediately after this, solenoid valve [V1] closes, allowing the gas in the gas tube between [V1] and [V2] to be released to a state of atmospheric pressure equilibrium. If solenoid valve [V2] leaks, the tester can monitor the pressure decay rate and display a test failure result. This additional solenoid valve enables the tester to have a self-diagnostic function.

[0055] like Figure 11 As shown, during the stabilization phase, the gas inside the test piece circulates and tends to stabilize; then during the testing phase, it is monitored by the instrument's pressure sensor [PS]. If the leakage of the internal gas of the test piece exceeds the preset allowable leakage range (pressure drop or quantified leakage rate during the test time), the instrument will display the reason for the failure and give the pressure drop or leakage rate in predefined output units.

[0056] like Figure 12 As shown, after the test phase ends and the exhaust phase begins, solenoid valve [V2] opens, and the gas inside the test piece is discharged through solenoid valve [V1] until it reaches atmospheric pressure. The instrument then prepares for the next test.

[0057] The working principle of the airtightness testing device for hot and cold ceramic valve cores of this utility model is as follows:

[0058] The test bracket 1 supports the overall structure. The upper and lower pressing cylinders 21 of the upper and lower pressing fixing plates 2 drive the lifting fixing seat 22 to press down, fixing the valve core 6 to the fixture base 7. The stepper motor 31 of the torsion transmission assembly 3 drives the drive rod 33 to rotate through the gear transmission belt assembly 32, causing the lever rotating seat 4 to rotate. Then, the lever control cylinder 51 of the lever control rod 5 pushes the actuating tooth plate 52, which drives the actuating block 54 through the actuating gear 53, realizing the opening and closing and angle adjustment of the valve core handle 62. When the valve core handle 62 rotates, the water guide end cover 63 switches the air path of the water outlet port, hot water port and cold water port. The detection sensor in the fixture base 7 monitors the cavity air pressure change in real time to detect the airtightness.

[0059] Compared with the prior art, the present invention has the following advantages:

[0060] 1. A lever control rod 5 and a lever rotation seat 4 are provided to adjust the valve core 6. The lever control rod 5 and the lever rotation seat 4 are driven to move by the upper and lower clamping fixing plates 2. The position of the lever of the valve core 6 is adjusted by the lever control rod 5 and the lever rotation seat 4 to adjust the internal flow state of the valve core 6. This facilitates the detection of airtightness under different flow states inside the valve core 6. The upper and lower clamping fixing plates 2 are controlled to move according to the detection data, which facilitates the quick detection and disassembly of the airtightness of the valve core 6 and improves the convenience of valve core airtightness detection.

Claims

1. A device for testing the airtightness of hot and cold ceramic valve cores, characterized in that: The test support includes a test bracket (1) for support. A lifting and lowering clamping plate (2) is fixedly installed at the top of the test bracket (1). A rotational drive assembly (3) is fixedly installed inside the lifting and lowering clamping plate (2). A torque-transmitting lever rotating seat (4) is fixedly installed at the output end of the torque drive assembly (3). A lever control rod (5) for opening and closing the lever is fixedly installed at one end of the lever rotating seat (4). A valve core (6) for airtightness testing is engaged at one end of the lever control rod (5). A fixture base (7) for support is provided below the valve core (6). 6) Includes a valve core fixing seat (61) for support, a valve core handle (62) for opening and closing the valve, and a water guide end cap (63) for controlling the direction of water flow. The valve core fixing seat (61) is fixedly installed on the top of the fixture base (7). The top of the valve core fixing seat (61) is rotatably connected to the valve core handle (62) which engages with the lever control rod (5). The bottom of the valve core fixing seat (61) is fixedly installed with a water guide end cap (63) located inside the fixture base (7). The water guide end cap (63) has an outlet port, a hot water port, and a cold water port inside. The fixture base (7) is equipped with a detection sensor for airtightness detection.

2. The airtightness testing device for hot and cold ceramic valve cores as described in claim 1, characterized in that: The test bracket (1) has a gas source triple unit at one end of its top. The gas source triple unit is connected to a central control unit for signal processing and automatic control. The central control unit is connected to the upper and lower clamping fixing plates (2), the torsion transmission assembly (3), and the lever rotating seat (4).

3. The airtightness testing device for hot and cold ceramic valve cores as described in claim 2, characterized in that: The upper and lower clamping fixing plate (2) includes an upper and lower clamping cylinder (21) connected to the central control unit signal and a lifting fixing seat (22) for support and fixing. The upper and lower clamping cylinder (21) is fixedly installed on the top of the test bracket (1). The output end of the upper and lower clamping cylinder (21) is fixedly installed with the lifting fixing seat (22). The four corners of the lifting fixing seat (22) are connected with guide rods that are fixedly installed with the test bracket (1).

4. The airtightness testing device for hot and cold ceramic valve cores as described in claim 3, characterized in that: The torsional transmission assembly (3) includes a stepper motor (31) connected to the central control unit signal, a gear transmission belt assembly (32) for mechanical transmission, and a drive rod (33) for power transmission. The stepper motor (31) is fixedly installed at one end of the lifting fixed seat (22). The output end of the stepper motor (31) is fixedly installed with the gear transmission belt assembly (32) located inside the lifting fixed seat (22). One end of the gear transmission belt assembly (32) is fixedly installed with the drive rod (33) that rotates inside the lifting fixed seat (22). One end of the drive rod (33) is engaged with a control connection seat (8) that rotates inside the lifting fixed seat (22).

5. The airtightness testing device for hot and cold ceramic valve cores as described in claim 4, characterized in that: The lever control lever (5) includes a lever control cylinder (51) connected to the central control unit, a lever tooth plate (52) for transmission, a lever gear (53) for mechanical transmission, and a lever block (54) for controlling the lever. The lever control cylinder (51) is fixedly installed on the top of the control connector (8). The lever tooth plate (52) is fixedly installed at the output end of the lever control cylinder (51). The lever gear (53) is engaged below the lever tooth plate (52). A connecting shaft is provided in the middle of the lever gear (53) to support it. The lever block (54) that rotates inside the control connector (8) is fixedly installed on the lever (53) through the connecting shaft. The lever block (54) and the valve core handle lever (62) are engaged.

6. The airtightness testing device for hot and cold ceramic valve cores as described in claim 5, characterized in that: The valve core fixing seat (61) is provided with a valve core body that is fixedly installed with the valve core handle (62), and the water guide end cap (63) is located below the valve core body.

7. The airtightness testing device for hot and cold ceramic valve cores as described in claim 6, characterized in that: The fixture base (7) has an internal cavity for conduction, and the two ends of the cavity have guide holes for connecting to external devices. The detection sensor and the central control unit are connected by signal.

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