Sealing performance testing device with discharging function

Abstract

The utility model belongs to the technical field of sealing performance testing, and particularly relates to a sealing performance testing device with a discharging function, which comprises a supporting plate, a pressing assembly arranged on the supporting plate and a sealing discharging assembly. The pressing assembly comprises two rib plates arranged on the supporting plate, a mounting plate arranged on the two rib plates, an air cylinder arranged on the mounting plate, a connecting plate arranged at the telescopic end of the air cylinder and a hand rotating valve arranged on the supporting plate. The sealing discharging assembly comprises a cushion block arranged on the supporting plate, a groove formed in the cushion block, a discharging plate arranged in the groove and an air inlet hole formed in the cushion block, the air inlet hole is communicated with the groove, a linear bearing, a spring guide column and a pressing block are arranged in the groove, a guide column is arranged in the linear bearing, the upper end of the guide column is fixedly connected with the discharging plate, and the lower end of the guide column is fixedly connected with the pressing block. The outer circle face of the spring guide column is sleeved with a rectangular spring, and the pressing block penetrates through the discharging plate. The sealing performance testing device is accurate in testing result, convenient in test piece installation and material returning in the testing process, and easy to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing test, and in particular relates to a sealing test device with a discharging function. Background Art

[0002] The sealing performance of the rear cover of the automobile engine cooling water pump affects the normal operation of the engine, and the sealing performance requirements are very high. The rear cover of the automobile engine cooling water pump produced must pass the sealing performance test before it can be used. The existing sealing test device is easy to get stuck on the device after the sealing test is completed, and it is difficult to remove. The operation is inconvenient, and the positioning is not accurate enough, and the sealing performance test results are inaccurate. Utility Model Content

[0003] In view of the shortcomings of the existing methods, the utility model provides a sealing test device with a discharging function, which simulates the normal installation state of the test piece to perform a sealing test, the test result is accurate, and the test piece installation and unloading process are convenient and easy to operate.

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

[0005] A sealing test device with a discharging function comprises a support plate, a pressing assembly arranged on the support plate and a sealing discharging assembly, wherein a support leg is arranged at the bottom of the support plate, and the pressing assembly comprises two rib plates arranged on the support plate, a mounting plate arranged on the two rib plates, a cylinder arranged on the mounting plate, a connecting plate arranged at the telescopic end of the cylinder and a hand-turned valve arranged on the support plate, wherein the hand-turned valve controls the telescopic end of the cylinder; the sealing discharging assembly comprises a pad arranged on the support plate, a groove provided on the pad, a discharging plate provided in the groove and an air inlet provided on the pad, the air inlet is connected with the groove, a test piece is arranged on the discharging plate, a sealing ring is arranged on the step surface of the test piece close to the groove, a linear bearing, a spring guide column and a pressure block are arranged in the groove, a guide column is arranged in the linear bearing, an upper end of the guide column is fixedly connected to the discharging plate, a rectangular spring is sleeved on the outer circumference of the spring guide column, and the pressure block passes through the discharging plate.

[0006] Preferably, equal-height bolts are also arranged in the grooves, and first positioning holes matching the equal-height bolts are provided on the unloading plate. The equal-height bolts penetrate the unloading plate and the upper bolt heads are engaged in the first positioning holes.

[0007] Preferably, the first positioning hole is a stepped hole.

[0008] Preferably, a second positioning hole is arranged on the upper end surface of the cushion block, a positioning pin is arranged in the second positioning hole, and the top of the positioning pin extends into a third positioning hole on the convex edge of the specimen.

[0009] Preferably, a silicone pad is provided on the working surface of the connecting plate.

[0010] Preferably, an exhaust throttle valve is also provided at the exhaust port of the cylinder.

[0011] Preferably, a printing pin holder is also provided on the support plate, and a pneumatic printing pin is provided on the printing pin holder.

[0012] The positive and beneficial effects of the utility model:

[0013] 1. The sealing area of ​​the gasket groove of the utility model sealing detection device adopts the design of the test piece to the hand piece size, simulates the normal installation state of the test piece to carry out the sealing test, and ensures the accuracy of the test result. The gasket groove and the sealing ring on the step surface below the convex edge of the test piece are radially sealed (small interference fit), with high processing accuracy and assembly accuracy, good sealing, and accurate test results. The sealing unloading component also includes linear bearings, guide columns, spring guide columns, and rectangular springs to ensure that the product has an accurate relative position when switching between the test state and the unloading state, and each state is accurately positioned. At the same time, the smoothness of the movement when the two states are relatively switched is guaranteed. The test piece is easy to install and withdraw during the test process, which well solves the problem of the product being difficult to remove after the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is one of the structural schematic diagrams of the sealing test device with unloading function of the utility model;

[0015] Figure 2 This is the second structural schematic diagram of the sealing test device with unloading function of the utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the sealing test device with unloading function of the utility model;

[0017] Figure 4 It is a schematic diagram of the cushion block structure;

[0018] Figure 5 This is the third structural schematic diagram of the sealing test device with unloading function of the utility model;

[0019] Figure 6 It is the schematic diagram of the specimen structure;

[0020] Figure 7 Schematic diagram of the structure after the sealing ring is installed on the specimen;

[0021] In the figure: 1-support plate, 2-rib plate, 3-mounting plate, 4-cylinder, 5-pad, 6-unloading plate, 7-air inlet, 8-locating pin, 9-hand valve, 10-leg, 11-print needle bracket, 12-pneumatic print needle, 13-linear bearing, 14-equal height bolt, 15-rectangular spring, 16-pressure block, 17-groove, 18-exhaust throttle valve, 19-connecting plate, 20-silicone pad, 21-guide column, 22-spring guide column, 23-linear bearing mounting groove, 24-equal height bolt mounting groove, 25-spring guide column mounting groove, 26-pressure block mounting groove, 27-test piece, 28-sealing ring, 29-second positioning hole, 30-third positioning hole. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with some specific embodiments.

[0023] See also Figure 1-7 A sealing test device with a discharging function comprises a support plate 1, a pressing assembly arranged on the support plate 1 and a sealing discharging assembly. A support leg 10 is arranged at the bottom of the support plate 1. The pressing assembly comprises two rib plates 2 arranged on the upper surface of the support plate 1, a mounting plate 3 arranged on the two rib plates 2, a cylinder 4 arranged on the mounting plate 3, a connecting plate 19 arranged at the telescopic end of the cylinder and a hand-turned valve 9 arranged on the support plate 1. The hand-turned valve 9 controls the up and down telescopic movement of the cylinder 2 through an air circuit.

[0024] The sealing unloading assembly includes a pad 5 arranged on the upper surface of the support plate 1, a groove 17 opened on the pad 5, a unloading plate 6 arranged in the groove 17 and an air inlet 7 opened on the pad 5. The air inlet 7 is connected to the groove 17. A test piece 27 is arranged on the unloading plate 6. The test piece 27 is the rear cover of the automobile engine cooling water pump. A sealing ring 28 is arranged on the outer periphery of the step surface close to the groove 17 below the top convex edge of the test piece 27, so that the test piece 27 and the groove 17 form a closed space for the test piece 27 to facilitate the test process. The sealing area of ​​the groove of the pad 5 adopts the design of the test piece and the counterpart size to ensure the accuracy of the air tightness test result. A linear bearing 13, a spring guide column 22 and a pressure block 16 are arranged in the groove 17. Two linear bearing mounting grooves 23, four spring guide column mounting grooves 25 and a pressure block mounting groove 26 are arranged in the groove 17. A linear bearing 13 is installed, and a guide column 21 is slidably connected inside the linear bearing 13. The upper end of the guide column 21 is fixedly connected to the unloading plate 6. The guide column 21 moves up and down inside the linear bearing 13. The linear bearing and the guide column guide the movement of the unloading plate to ensure the normal switching between the unloading state and the test state and the smooth movement of the unloading plate. A spring guide column 22 is installed in the spring guide column installation groove 25. A rectangular spring 15 is sleeved on the outer cylindrical surface of the spring guide column 22. The rectangular spring 15 is respectively in contact with the bottom surface of the groove 17 and the lower surface of the unloading plate 6. When the test of the specimen is completed, the rectangular spring 15 acts as a power component to withdraw the specimen 27 upward. A pressing block 16 is installed in the pressing block installation groove 26. The pressing block 16 penetrates the unloading plate 6. In the test state, the pressing block 16 penetrates the unloading plate 6 and abuts against the bottom step surface of the specimen 27, and seals the opening on the bottom step surface of the specimen 27.

[0025] Furthermore, four groups of equal height bolt installation grooves 24 are provided in the groove 17, and equal height bolts 14 are installed in the equal height bolt installation grooves 24. The unloading plate 6 is provided with a first positioning hole matching the equal height bolts 14, and the equal height bolts 14 penetrate the unloading plate 6 and the upper end bolt head is engaged in the first positioning hole. During the unloading process of the rectangular spring 15, the equal height bolts 14 restrict the unloading plate 6 to the designed initial state to prevent the unloading plate 6 from being dislodged due to inertia during the unloading process.

[0026] Furthermore, the first positioning hole is a stepped hole, which can better prevent the stripper plate 6 from falling off from the equal-height bolts 14 .

[0027] Furthermore, a second positioning hole 29 is provided at the edge of the upper end surface of the cushion block 5, and a positioning pin 8 is arranged in the second positioning hole 29. Two second positioning holes 29 are provided, and a cylindrical pin and a diamond pin are respectively arranged in the two second positioning holes 29. The top of the positioning pin 8 extends to the third positioning hole 30 on the top convex edge of the test piece 27. The positioning pin 8 guides the vertical movement of the test piece 27.

[0028] Furthermore, a silicone pad 20 is provided on the working surface of the connecting plate 19. The provision of the silicone pad ensures that the cylinder drives the connecting plate to press the test piece 27 steadily and evenly.

[0029] Furthermore, an exhaust throttle valve 18 is also provided at the exhaust port of the cylinder 4. Usually, the cylinder pressing and retracting speeds are very fast. After the test is completed, in order to prevent the cylinder retracting speed from being faster than the speed at which the rectangular spring pushes the unloading plate upward, an exhaust throttle valve is installed at the exhaust port of the cylinder. When the cylinder is exhausted, due to the limiting effect of the exhaust throttle valve, the flow rate of the cylinder exhaust will be reduced, thereby achieving the purpose of reducing the cylinder retracting speed.

[0030] Furthermore, a printing pin holder 11 is provided on the upper surface of the support plate 1, and a pneumatic printing pin 12 is provided on the printing pin holder 11. After the test is completed, the pneumatic printing pin makes a test mark on the qualified test piece.

[0031] The method for using the sealing test device with unloading function comprises the following steps:

[0032] 1) Install a stainless steel lock nut straight joint on the air inlet 7 of the cushion block 5, install an air pipe at one end of the stainless steel lock nut straight joint to connect with the testing equipment, place the test piece 27 on the unloading plate 6, the top of the positioning pin 8 extends to the third positioning hole 30 on the top convex edge of the test piece 27, and the rectangular spring 15 supports the unloading plate 6. This initial state is the unloading state;

[0033] 2) Pull the hand-operated valve 9, and the cylinder 4 drives the connecting plate 19 to move downward to press the test piece 27. The test piece 27 is guided by the positioning pin on the cushion block 5 and continues to move downward on the discharge plate 6 until the lower end surface of the convex edge of the test piece 27 fits with the upper end surface of the cushion block 5. The discharge plate 6 stops moving downward, and the test piece 27 is pressed against the discharge plate 6. At the same time, the sealing ring 28 fits tightly with the inner wall of the groove 17, forming a closed space between the test piece 27 and the groove 17. The rectangular spring 15 is in a compressed state. The test piece 27 and the discharge plate 6 are switched to the detection state under the continuous load of the cylinder 4. The closed space is inflated from the detection equipment through the stainless steel lock nut straight-through joint to complete the sealing test;

[0034] 3) The hand-operated valve 9 is turned again, the piston rod of the cylinder 4 is retracted, the rectangular spring 15 is deformed again, the test piece 27 is pushed out, the material is returned, and the pneumatic printing needle 12 makes a test mark on the qualified test piece.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A sealing test device with unloading function, characterized in that: The invention comprises a support plate (1), a pressing assembly arranged on the support plate (1), and a sealing unloading assembly, wherein a support leg (10) is arranged at the bottom of the support plate (1), the pressing assembly comprises two rib plates (2) arranged on the support plate (1), a mounting plate (3) arranged on the two rib plates (2), a cylinder (4) arranged on the mounting plate (3), a connecting plate (19) arranged at the telescopic end of the cylinder (4), and a hand-operated valve (9) arranged on the support plate (1), wherein the hand-operated valve (9) controls the telescopic movement of the cylinder; the sealing unloading assembly comprises a cushion block (5) arranged on the support plate (1), a groove (17) provided on the cushion block (5), and a valve (19) arranged in the groove. A stripping plate (6) in the groove (17) and an air inlet (7) provided on the cushion block (5), the air inlet (7) being communicated with the groove (17), a test piece (27) being provided on the stripping plate (6), a sealing ring (28) being provided on a step surface of the test piece (27) close to the groove (17), a linear bearing (13), a spring guide column (22) and a pressure block (16) being provided in the groove (17), a guide column (21) being provided in the linear bearing (13), an upper end of the guide column (21) being fixedly connected to the stripping plate (6), a rectangular spring (15) being sleeved on an outer circumferential surface of the spring guide column (22), and the pressure block (16) passing through the stripping plate (6).

2. The sealing test device with unloading function according to claim 1, characterized in that: A height bolt (14) is also arranged in the groove (17), and a first positioning hole matching the height bolt (14) is provided on the discharge plate (6). The height bolt (14) passes through the discharge plate (6) and the upper end bolt head is engaged in the first positioning hole.

3. The sealing test device with unloading function according to claim 2, characterized in that: The first positioning hole is a stepped hole.

4. The sealing test device with unloading function according to claim 1, characterized in that: A second positioning hole (29) is provided on the upper end surface of the cushion block (5), a positioning pin (8) is provided in the second positioning hole (29), and the top of the positioning pin (8) extends into a third positioning hole (30) on the convex edge of the test piece (27).

5. The sealing test device with unloading function according to claim 1, characterized in that: A silica gel pad (20) is provided on the working surface of the connecting plate (19).

6. The sealing test device with unloading function according to claim 1, characterized in that: An exhaust throttle valve (18) is also provided at the exhaust port of the cylinder (4).

7. The sealing test device with unloading function according to any one of claims 1 to 6, characterized in that: A printing pin holder (11) is also provided on the support plate (1), and a pneumatic printing pin (12) is provided on the printing pin holder (11).

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