Leakage test system for ESC product

Abstract

The utility model belongs to the field of hydraulic valves, and particularly relates to a leakage test system for an ESC product. A leakage test system for an ESC product comprises a gas source which is a nitrogen gas source and a test board, and the test board is used for fixing a to-be-tested workpiece and realizing connection between the to-be-tested workpiece and the gas source; the device further comprises a first air pressure sensor, a second air pressure sensor and a third air pressure sensor, the first air pressure sensor is used for detecting the pressure of the air source, the second air pressure sensor is used for detecting the pressure of the air inlet of the to-be-detected workpiece, and the third air pressure sensor is used for detecting the pressure of the air outlet of the to-be-detected workpiece. The signal processing unit is used for acquiring and processing signals of the second air pressure sensor and the third air pressure sensor; the control unit is connected with the to-be-tested workpiece and used for driving the to-be-tested workpiece to simulate actual working conditions, and the test accuracy and the product quality are improved.

Description

Technical Field

[0001] The utility model belongs to the field of hydraulic valves, and in particular relates to a leakage testing system for ESC products. Background Art

[0002] The existing technology requires that ESC products be inspected and leak tests be performed using compressed air. However, due to moisture in the air, the test results are inaccurate and residues may remain on the tested products. The accuracy of compressed gas testing is not high enough, and defective products cannot be detected during production, causing leaked parts to flow to customers. Similar to previous test systems, which are open-loop or semi-closed-loop systems, the pressure in the system cannot be accurately measured, the algorithm is not accurate enough, and the error is large. Summary of the invention

[0003] In view of the problems existing in the prior art, the utility model designs a leakage testing system for ESC products using a nitrogen gas source.

[0004] The technical solution of the utility model is as follows:

[0005] A leakage test system for ESC products, comprising:

[0006] A gas source, wherein the gas source is a nitrogen gas source,

[0007] A test bench, which is used to fix the workpiece to be tested and connect the workpiece to be tested with an air source;

[0008] The system also includes a first air pressure sensor, a second air pressure sensor and a third air pressure sensor. The first air pressure sensor is used to detect the pressure of the air source, the second air pressure sensor is used to detect the pressure of the air inlet of the workpiece to be tested, and the third air pressure sensor is used to detect the pressure of the air outlet of the workpiece to be tested.

[0009] and a signal processing unit, the signal processing unit collecting and processing signals from the second air pressure sensor and the third air pressure sensor;

[0010] The control unit is connected to the workpiece to be tested and is used to drive the workpiece to be tested to simulate actual working conditions.

[0011] Furthermore, the control unit includes an ECU module connected to the workpiece to be tested, and the ECU module is connected to the controller via a communication control box.

[0012] Furthermore, the test bench includes a base, a first mounting plate and a second mounting plate are provided on the base, the first mounting plate is provided with a workpiece fixing seat, the second mounting plate is provided with a group of guide rails, a sliding seat is provided on the guide rail, a sealing joint connected to the air inlet of the workpiece to be tested is provided on the end face of the sliding seat, and a vertical mounting plate is also provided on the base, a clamping hydraulic cylinder is provided on the vertical mounting plate, the output end of the clamping hydraulic cylinder is connected to the sliding seat, and the air source is connected to the sealing joint through a pipeline.

[0013] Furthermore, a photoelectric sensor is also provided on the first mounting plate.

[0014] Furthermore, the sliding seat includes a sliding base plate connected to the guide rail, the sliding base plate is provided with an air intake plate, the front end of the air intake plate is provided with a plurality of air holes, and also includes a fixed plate fixed to the front end of the air intake plate, the fixed plate is provided with a mounting groove penetrating the fixed plate, a limiting rib is provided on the wall surface of the front end of the mounting groove, a sealing plate is embedded and installed in the mounting groove, and the end face of the sealing plate is abutted against the limiting rib, the sealing plate is provided with air holes corresponding to the air intake plate, and the sealing joint is fixedly connected to the sealing plate.

[0015] Furthermore, the sealing plate is provided with a circle of grooves, and the sealing ring is installed in the grooves, and the sealing ring is used to improve the sealing performance between the sealing plate and the air intake plate.

[0016] In summary, the utility model has the following beneficial effects:

[0017] The utility model designs a leakage test system for ESC products. Firstly, the gas source is improved, and high-pressure and high-purity nitrogen is used as the gas source to ensure a good test environment, thereby overcoming the problems of residues and insufficient test accuracy in the prior art of compressed air testing. Secondly, multiple air pressure sensors are used to detect the air pressure of multiple parts, thereby realizing closed-loop detection, improving the accuracy of detection, and ensuring that leaking parts can be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A block diagram of a test system of the utility model;

[0019] Figure 2 is a three-dimensional schematic diagram of the test bench;

[0020] Figure 3 It is a three-dimensional schematic diagram of an air intake plate, a fixing plate and a sealing plate;

[0021] Figure 4 is a three-dimensional schematic diagram of an air intake plate and a fixing plate;

[0022] Figure 5 is a front view schematic diagram of a sealing plate;

[0023] In the figure, 1 is the gas source.

[0024] 2 is the test bench,

[0025] 3 is a first air pressure sensor, 20 is a base, 21 is a first mounting plate, 210 is a workpiece fixing seat, 22 is a second mounting plate, 220 is a guide rail, 23 is a sliding seat, 24 is a sealing joint, 25 is a vertical mounting plate, 26 is a clamping hydraulic cylinder, 211 is a photoelectric sensor, 230 is a sliding bottom plate, 231 is an air intake plate, 232 is a fixing plate, 2320 is a mounting groove, 2321 is a limit retaining edge, 233 is a sealing plate, 2330 is a groove,

[0026] 4 is a second air pressure sensor,

[0027] 5 is a third air pressure sensor,

[0028] 6 is a signal processing unit,

[0029] 7 is a control unit, 70 is an ECU module, 71 is a controller, 72 is a communication control box, and 8 is a workpiece to be tested. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0031] It should be noted that when an element is referred to as being "disposed on" or "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is referred to as being "fixed on" another element, or "fixedly connected" to another element, they may be fixed in a detachable manner or in a non-detachable manner. When an element is considered to be "connected" or "rotatably connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to restrict the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The terms “first”, “second”, “third” and the like in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0034] See also Figures 1 to 5 As shown, a leakage test system for ESC products includes a gas source 1, wherein the gas source is a nitrogen gas source, and the pressure of the nitrogen gas source is 150 Bar. By using the nitrogen gas source, the error caused by the gas source during the compressed air detection can be discharged, and the pollution inside the ESC valve block can also be avoided; further, by using high-pressure gas, the leakage caused by the poorly installed part of the ESC valve block can be detected, thereby improving the accuracy of the detection;

[0035] A test bench 2, which is used to fix the workpiece to be tested and connect the workpiece to be tested with the gas source;

[0036] It also includes a first air pressure sensor 3, a second air pressure sensor 4 and a third air pressure sensor 5. The first air pressure sensor is used to detect the pressure of the air source, the second air pressure sensor is used to detect the pressure of the air inlet of the workpiece to be tested, and the third air pressure sensor is used to detect the pressure of the air outlet of the workpiece to be tested.

[0037] and a signal processing unit 6, which collects and processes signals from the second air pressure sensor and the third air pressure sensor;

[0038] The control unit 7 is connected to the workpiece to be measured and is used to drive the workpiece to be measured to simulate actual working conditions.

[0039] The utility model designs a leakage test system, which is used for factory inspection of ESC products. The control unit is connected to the ESC product, and is used to control the movement of each valve block in the ESC product, so as to test each valve block in the ESC product. The ESC product of the utility model includes a boost valve, a pressure reducing valve, an isolation valve and a reversing valve. The first air pressure sensor is used to detect the pressure of the air source to ensure the stability of the air source. The second air pressure sensor and the third air pressure sensor are used to detect the air inlet and the air outlet of the workpiece to be tested, and the two air pressure values ​​are compared to determine whether there is a leak in the ESC valve block. The closed-loop test method is adopted to improve the accuracy of the detection, improve the product quality, and enhance customer satisfaction.

[0040] Furthermore, the control unit 7 includes an ECU module 70 connected to the workpiece to be tested, and the ECU module is connected to the controller 71 through a communication control box 72. The controller is a storage device for storing control instructions. The controller communicates with the ECU module through the communication control box, and sends the control instructions of the ESC valve block to the ECU module. The ECU module drives the action of the ESC valve block according to the control instructions.

[0041] See also Figure 2 As shown, the test bench 2 includes a base 20, on which a first mounting plate 21 and a second mounting plate 22 are provided, on which the first mounting plate 21 is provided a workpiece fixing seat 210, on which a group of guide rails 220 are provided, on which the guide rails 220 are provided a sliding seat 23, on the end surface of the sliding seat 23 is provided a sealing joint 24 connected to the air inlet of the workpiece to be tested, and on which a vertical mounting plate 25 is further provided, on which a clamping hydraulic cylinder 26 is provided, the output end of the clamping hydraulic cylinder 26 is connected to the sliding seat 23, and the air source is connected to the sealing joint through a pipeline. An automated test bench is provided herein, in which the workpiece to be tested is placed on the workpiece fixing seat, and then the clamping hydraulic cylinder is actuated to push the sliding seat to move, so that the sealing joint is docked with each hole position of the workpiece to be tested and sealed.

[0042] Furthermore, a photoelectric sensor 211 is also provided on the first mounting plate 21. The photoelectric sensor is used to detect whether a workpiece to be tested is placed on the workpiece fixing seat. If the photoelectric sensor detects that there is no workpiece on the workstation to be tested, the test system cannot be started, thereby avoiding waste of time and improving production efficiency.

[0043] Further, see Figures 3 to 5 As shown, the sliding seat 23 includes a sliding bottom plate 230 connected to the guide rail 220, an air inlet plate 231 is provided on the sliding bottom plate 230, a plurality of air holes are provided at the front end of the air inlet plate, and a fixing plate 232 fixed at the front end of the air inlet plate, a mounting groove 2320 penetrating the fixing plate is provided on the fixing plate 232, a limiting rib 2321 is provided on the wall surface at the front end of the mounting groove 2320, a sealing plate 233 is embedded and installed in the mounting groove 2320, and the end face of the sealing plate 233 is against the limiting rib, and the sealing plate is provided with a corresponding rib on the air inlet plate The air hole, the sealing joint 24 is fixedly connected to the sealing plate, and the structure of the sliding seat is further limited here, and specifically the air intake plate, the fixed plate, the sealing plate and the sealing joint are limited. The sealing joint is fixedly connected to the sealing plate, and the sealing plate is embedded in the mounting groove of the fixed plate. Then the fixed plate and the air intake plate are fixed to realize the connection between the air intake plate and the sealing plate. A modular sliding seat structure is realized here, which is convenient for replacement and maintenance of the sealing plate. Furthermore, it is also convenient to match different sealing plates according to different ESC modules, thereby improving the applicability of the equipment.

[0044] Furthermore, the sealing plate 233 is provided with a circle of grooves 2330, and a sealing ring is installed in the groove, and the sealing ring is used to improve the sealing between the sealing plate and the air intake plate.

[0045] In summary, the utility model has the following beneficial effects:

[0046] The utility model designs a leakage test system for ESC products. Firstly, the gas source is improved, and high-pressure and high-purity nitrogen is used as the gas source to ensure a good test environment, thereby overcoming the problems of residues and insufficient test accuracy in the prior art of compressed air testing. Secondly, multiple air pressure sensors are used to detect the air pressure of multiple parts, thereby realizing closed-loop detection, improving the accuracy of detection, and ensuring that leaking parts can be detected.

[0047] Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Claims

1. A leakage test system for ESC products, characterized in that: include A gas source, wherein the gas source is a nitrogen gas source, A test bench, which is used to fix the workpiece to be tested and connect the workpiece to be tested with an air source; The system also includes a first air pressure sensor, a second air pressure sensor and a third air pressure sensor. The first air pressure sensor is used to detect the pressure of the air source, the second air pressure sensor is used to detect the pressure of the air inlet of the workpiece to be tested, and the third air pressure sensor is used to detect the pressure of the air outlet of the workpiece to be tested. and a signal processing unit, the signal processing unit collecting and processing signals from the second air pressure sensor and the third air pressure sensor; The control unit is connected to the workpiece to be tested and is used to drive the workpiece to be tested to simulate actual working conditions.

2. A leakage testing system for ESC products according to claim 1, characterized in that: The control unit comprises an ECU module connected to the workpiece to be tested, and the ECU module is connected to the controller via a communication control box.

3. A leakage testing system for ESC products according to claim 1, characterized in that: The test bench includes a base, on which a first mounting plate and a second mounting plate are provided, the first mounting plate is provided with a workpiece fixing seat, the second mounting plate is provided with a group of guide rails, the guide rails are provided with a sliding seat, the end surface of the sliding seat is provided with a sealing joint connected to the air inlet of the workpiece to be tested, the base is also provided with a vertical mounting plate, the vertical mounting plate is provided with a clamping hydraulic cylinder, the output end of the clamping hydraulic cylinder is connected to the sliding seat, and the air source is connected to the sealing joint through a pipeline.

4. A leakage testing system for ESC products according to claim 3, characterized in that: The first mounting plate is also provided with a photoelectric sensor.

5. A leakage testing system for ESC products according to claim 3, characterized in that: The sliding seat includes a sliding base plate connected to the guide rail, an air intake plate is provided on the sliding base plate, a plurality of air holes are provided at the front end of the air intake plate, and a fixing plate fixed to the front end of the air intake plate, a mounting groove penetrating the fixing plate is provided on the fixing plate, a limiting rib is provided on the wall surface at the front end of the mounting groove, a sealing plate is embedded and installed in the mounting groove, and the end face of the sealing plate is abutted against the limiting rib, the sealing plate is provided with air holes corresponding to those on the air intake plate, and the sealing joint is fixedly connected to the sealing plate.

6. A leakage testing system for ESC products according to claim 5, characterized in that: The sealing plate is provided with a circle of grooves, and the sealing ring is installed in the grooves. The sealing ring is used to improve the sealing performance between the sealing plate and the air intake plate.

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