Fixture for sealing test

Abstract

The utility model relates to a clamp used for a sealing performance test, comprising a pedestal used for placing a workpiece to be detected; the clamping mechanism is arranged on the base and is used for clamping a workpiece to be detected; the device is characterized in that the clamping mechanism comprises at least one group of clamping assemblies, each group of clamping assemblies comprises two clamping blocks which are oppositely arranged, and at least one clamping block in each group of clamping assemblies is restrained on the base in a sliding mode, so that the two clamping blocks in each group of clamping assemblies are both attached to a workpiece to be detected; and at least one group of clamping assemblies is provided with a plugging part for plugging the to-be-detected workpiece. The clamping device has the advantages that the at least one clamping block in each group of clamping components is restrained on the base in a sliding manner, so that the positions of the clamping blocks can be adaptively changed according to different shapes, sizes and other characteristics of the workpieces to be detected, the clamping of the different workpieces to be detected is further realized, and the clamping device has good universality.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing performance testing, in particular to a fixture for sealing performance testing. Background Art

[0002] The cold water tank is an important component of the refrigeration unit of the water purifier and also a container for storing cold water. If the cold water tank has poor sealing performance, it may cause the refrigerated water function to fail, water leakage may damage the water purifier, waste water resources, and seriously may pose a threat to the safety of users. To test the sealing performance of the cold water tank, the existing technology often adopts the water inspection method, using an O-ring to seal the water inlet of the cold water tank and placing it in water, and inflating and maintaining pressure inside to observe whether there are bubbles generated. However, it is difficult to seal the water inlet of the cold water tank by this method, the sealing effect is difficult to guarantee, the experimental period is relatively long, and there are safety hazards when the outer shell is broken.

[0003] To ensure the sealing effect, for example, the Chinese utility model patent with the patent number ZL202220989734.7 (the authorized announcement number is CN217530573U) discloses a shell pressing fixture for airtight water inspection. When it works, the large circular opening of the workpiece shell is placed on the profiling cover base on the bottom plate, and the limiting rod is used to prevent the product from being placed incorrectly; then driven by the cylinder, the threaded holes on the left and right sides of the workpiece shell are sealed by the pressing ejector rod one, the pressing ejector rod two, and the pressing ejector rod three, the upper end of the shell is positioned and pressed by the pressing ejector rod four, and the upper threaded hole is sealed and pressed by the sealing pressure rod, so as to realize the pressing of the workpiece shell. Although this fixture can ensure the sealing performance driven by the cylinder, an profiling cover base and a pressing ejector rod four need to be set in this fixture, and the positions of the four cylinders are fixed. However, the space formed between the four cylinders is limited, so the width and height of the workpieces applicable to this fixture are limited, and the versatility is not strong. Therefore, further improvement is needed for the existing technology. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a fixture for sealing performance testing that can be suitable for clamping various workpieces to be detected in view of the above-mentioned existing technology.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows: A fixture for sealing performance testing, comprising:

[0006] A base for placing the workpiece to be detected;

[0007] A clamping mechanism arranged on the base for clamping the workpiece to be detected;

[0008] It is characterized in that: the clamping mechanism includes at least one set of clamping components, each set of clamping components includes two clamping blocks arranged oppositely, at least one clamping block in each set of clamping components is constrained on the base in a slidable manner, so that the two clamping blocks in each set of clamping components are both in contact with the workpiece to be detected, and then the workpiece to be detected is clamped, and at least one of the sets of clamping components has a plugging portion for plugging the workpiece to be detected.

[0009] To improve the clamping effect, preferably, the clamping components include two sets, namely the first clamping component and the second clamping component. The two clamping blocks in the first clamping component are respectively denoted as the first clamping block and the second clamping block, and the two clamping blocks in the second clamping component are respectively denoted as the third clamping block and the fourth clamping block. The first clamping block and the second clamping block are spaced apart along the first direction, the third clamping block and the fourth clamping block are spaced apart along the second direction, and the first direction and the second direction intersect.

[0010] Preferably, the first clamping block is fixedly arranged on the base, and a first air cylinder for driving the second clamping block to move is also arranged on the base.

[0011] To achieve the sealing of the workpiece to be detected, a sealing hole for inserting a first pipeline to be sealed on the workpiece to be detected is arranged on the second clamping block, the first pipeline to be sealed is hermetically connected to the sealing hole, and the sealing hole constitutes the above-mentioned plugging portion.

[0012] To achieve the movement of the second clamping block, a first guide rail arranged along the first direction is arranged on the base, a first sliding table capable of reciprocatingly sliding along it is arranged on the first guide rail, and the second clamping block is fixed on the first sliding table.

[0013] To be able to clamp the workpiece to be detected in the second direction, a driving mechanism for driving the third clamping block and the fourth clamping block to move simultaneously or separately is arranged on the base.

[0014] Preferably, the first direction and the second direction are perpendicular.

[0015] To achieve the movement of the third clamping block and the fourth clamping block, a second guide rail arranged along the first direction is arranged on the back surface of the base, a second sliding table capable of reciprocatingly sliding along it is arranged on the second guide rail, the driving mechanism includes a second air cylinder arranged on the back surface of the base, the ejector rod of the second air cylinder is drivingly connected to the second sliding table, and both the third clamping block and the fourth clamping block are drivingly connected to the second sliding table.

[0016] Preferably, two connecting members are connected to the second sliding table and arranged along the second direction. Two long holes extending along the second direction are formed in the base. A connecting rod capable of rotatably connecting with the corresponding connecting member is inserted into each long hole. The tops of the two connecting rods are respectively fixedly connected to the third clamping block and the fourth clamping block. The two connecting rods can slide in the corresponding long holes simultaneously under the action of the second cylinder, so that the third clamping block and the fourth clamping block approach or move away from the workpiece to be detected simultaneously.

[0017] In order to guide the movement of the third clamping block and the fourth clamping block, two sets of guiding members are further provided on the base. Each set of guiding members includes two guiding rods arranged oppositely. Each guiding rod is arranged along the second direction. The third clamping block and the fourth clamping block are respectively constrained on the two guiding rods of the corresponding set of guiding members and can slide along the guiding rods.

[0018] Compared with the prior art, the advantages of the present utility model are as follows: at least one clamping block in each clamping assembly is slidably constrained on the base, so the position of the clamping block can be adaptively changed according to different shapes, sizes and other characteristics of the workpiece to be detected, and thus the clamping of different workpieces to be detected can be realized, having good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural view of the fixture for leak tightness test in the embodiment of the present utility model;

[0020] Figure 2 is Figure 1 a schematic structural view of the fixture in (omitting the workpiece to be detected);

[0021] Figure 3 is Figure 2 a schematic structural view of another perspective of ;

[0022] Figure 4 is Figure 1 a sectional view of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] As shown in Figures 1 to 4As shown in the figure, the fixture for sealing test in this embodiment includes a base 1 and a clamping mechanism. A placement position 10 for placing the workpiece a to be detected is provided on the base 1. The workpiece a to be detected in this embodiment is a cold storage tank, which is basically square. First to-be-sealed pipes 1a and second to-be-sealed pipes 1b are provided on two opposite side walls of the workpiece a to be detected. The clamping mechanism is arranged on the base 1 and is used for clamping the workpiece a to be detected. The clamping mechanism includes at least one group of clamping components. Each group of clamping components is arranged along the outer periphery of the placement position 10. Each group of clamping components includes two clamping blocks arranged oppositely. At least one clamping block in each group of clamping components is constrained on the base 1 in a slidable manner, so that the two clamping blocks in each group of clamping components are both in contact with the workpiece a to be detected, and then the workpiece a to be detected is clamped. And at least one of the groups of clamping components has a blocking portion for blocking the workpiece a to be detected.

[0025] As Figure 2 shown in the figure, there are two groups of clamping components in this embodiment, namely a first clamping component and a second clamping component. The two clamping blocks in the first clamping component are respectively denoted as a first clamping block 211 and a second clamping block 212, and the two clamping blocks in the second clamping component are respectively denoted as a third clamping block 221 and a fourth clamping block 222. The first clamping block 211 and the second clamping block 212 are arranged at intervals along a first direction X, the third clamping block 221 and the fourth clamping block 222 are arranged at intervals along a second direction Y, and the first direction X and the second direction Y intersect. In this embodiment, the first direction X and the second direction Y are perpendicular, the base 1 is square, the first direction X is the length direction of the base 1, and the second direction Y is the width direction of the base 1.

[0026] As Figure 2 shown in the figure, the first clamping block 211 is fixedly arranged on the base 1. A first guide rail 11 arranged along the first direction X is provided on the base 1. A first sliding table 12 capable of reciprocatingly sliding along it is provided on the first guide rail 11. The second clamping block 212 is fixed on the first sliding table 12. A first air cylinder 31 for driving the second clamping block 212 to move is also provided on the base 1. As Figure 2 shown in the figure, a sealing hole 2120 (there are 2 sealing holes 2120 in Figure 2 this) for inserting the first to-be-sealed pipe 1a on the workpiece a to be detected is provided on the second clamping block 212. The first to-be-sealed pipe 1a is hermetically connected to the sealing hole 2120, and the sealing hole 2120 constitutes the above-mentioned blocking portion. A jack for inserting the second to-be-sealed pipe 1b on the workpiece a to be detected is provided on the first clamping block 211, and a pneumatic joint c is inserted into the jack.

[0027] A driving mechanism for driving the third clamping block 221 and the fourth clamping block 222 to move simultaneously or separately is provided on the base 1. As Figure 2 and Figure 3As shown in the figure, in this embodiment, a second guide rail 13 arranged along the first direction X is provided on the back surface of the base 1. A second slide table 14 capable of reciprocatingly sliding along it is provided on the second guide rail 13. The driving mechanism includes a second air cylinder 32 provided on the back surface of the base 1. The ejector rod of the second air cylinder 32 is drivingly connected to the second slide table 14. Both the third clamping block 221 and the fourth clamping block 222 are drivingly connected to the second slide table 14.

[0028] As Figure 2 and Figure 3 shown, specifically, the second slide table 14 is connected with two connecting members arranged along the second direction Y, namely a first connecting member 41 and a second connecting member 42; two long holes extending along the second direction Y are formed on the base 1, namely a first long hole 51 and a second long hole 52; a connecting rod capable of rotatably connecting with the corresponding connecting member is inserted into each long hole, namely a first connecting rod 61 inserted into the first long hole 51 and a second connecting rod 62 inserted into the second long hole 52. Both the first connecting rod 61 and the second connecting rod 62 are arranged vertically; in this embodiment, the first connecting member 41 is connected to the bottom end of the first connecting rod 61 through a bearing, and the second connecting member 42 is connected to the bottom end of the second connecting rod 62 through a bearing. The top ends of the two connecting rods are respectively fixedly connected to the third clamping block 221 and the fourth clamping block 222. The two connecting rods can slide in the first long hole 51 and the second long hole 52 correspondingly under the action of the second air cylinder 32, so that the third clamping block 221 and the fourth clamping block 222 approach or move away from the workpiece a to be detected simultaneously. In addition, as Figure 2 shown, two sets of guiding members are further provided on the base 1, namely a first guiding member 71 and a second guiding member 72. Each set of guiding members includes two guiding rods arranged oppositely. Each guiding rod is arranged along the second direction Y. The third clamping block 221 and the fourth clamping block 222 are respectively constrained on the two guiding rods of the corresponding set of guiding members and can slide along the guiding rods.

[0029] The working process of the fixture in this embodiment is as follows:

[0030] a. Place the workpiece a to be detected on the placement position 10, and correspondingly insert the second pipeline 1b to be sealed of the workpiece a to be detected into the jack on the first clamping block 211;

[0031] b. Start the second air cylinder 32. The ejector rod of the second air cylinder 32 drives the second slide table 14 to move on the second guide rail 13, and then drives the first connecting member 41 and the first connecting rod 61 to move, and can drive the second connecting member 42 and the second connecting rod 62 to move. Therefore, it can push the third clamping block 221 and the fourth clamping block 222 to approach the workpiece a to be detected simultaneously, so that the third clamping block 221 and the fourth clamping block 222 clamp the workpiece a to be detected, and ensure that the first pipeline 1a on the workpiece a to be detected is aligned with the sealing hole 2120 on the second clamping block 212;

[0032] c. Start the first cylinder 31 to drive the second clamping block 212 to slide on the first guide rail 11, so that the first pipeline to be sealed 1a on the workpiece a to be detected is inserted into the sealing hole 2120 on the second clamping block 212;

[0033] d. Vent air into the workpiece a to be detected from the pneumatic joint c, and place the whole base 1 in water, and observe whether there are bubbles generated, so as to realize the sealing detection and pressure holding detection.

[0034] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A fixture for sealing test, comprising: A base (1) for placing a workpiece (a) to be inspected; A clamping mechanism, arranged on the base (1) and used for clamping the workpiece (a) to be inspected; The invention is characterized in that: the clamping mechanism comprises at least one group of clamping components, each group of clamping components comprises two clamping blocks arranged opposite to each other, at least one clamping block in each group of clamping components is slidably constrained on the base (1), so that the two clamping blocks in each group of clamping components are in contact with the workpiece (a) to be detected, thereby clamping the workpiece (a) to be detected, and at least one of the groups of clamping components has a blocking portion for blocking the workpiece (a) to be detected.

2. The clamp according to claim 1, characterized in that: The clamping assembly comprises two groups, namely a first clamping assembly and a second clamping assembly. The two clamping blocks in the first clamping assembly are respectively recorded as a first clamping block (211) and a second clamping block (212), and the two clamping blocks in the second clamping assembly are respectively recorded as a third clamping block (221) and a fourth clamping block (222). The first clamping block (211) and the second clamping block (212) are arranged at intervals along a first direction (X), and the third clamping block (221) and the fourth clamping block (222) are arranged at intervals along a second direction (Y), and the first direction (X) and the second direction (Y) intersect.

3. The clamp according to claim 2, characterized in that: The first clamping block (211) is fixedly arranged on the base (1), and the base (1) is also provided with a first cylinder (31) for driving the second clamping block (212) to move.

4. The clamp according to claim 3, characterized in that: The second clamping block (212) is provided with a sealing hole (2120) for inserting the first pipe to be sealed (1a) on the workpiece (a) to be inspected, and the first pipe to be sealed (1a) is sealedly connected to the sealing hole (2120), and the sealing hole (2120) constitutes the above-mentioned blocking portion.

5. The clamp according to claim 4, characterized in that: The base (1) is provided with a first guide rail (11) arranged along a first direction (X), the first guide rail (11) is provided with a first slide table (12) capable of reciprocatingly sliding along the first guide rail, and the second clamping block (212) is fixed on the first slide table (12).

6. The clamp according to any one of claims 2 to 5, characterized in that: The base (1) is provided with a driving mechanism for driving the third clamping block (221) and the fourth clamping block (222) to move simultaneously or individually.

7. The clamp according to claim 6, characterized in that: The first direction (X) and the second direction (Y) are perpendicular.

8. The clamp according to claim 7, characterized in that: The back side of the base (1) is provided with a second guide rail (13) arranged along a first direction (X), and the second guide rail (13) is provided with a second slide (14) capable of reciprocatingly sliding along the second guide rail. The driving mechanism comprises a second cylinder (32) arranged on the back side of the base (1), a push rod of the second cylinder (32) is drivingly connected to the second slide (14), and the third clamping block (221) and the fourth clamping block (222) are both drivingly connected to the second slide (14).

9. The clamp according to claim 8, characterized in that: The second slide (14) is connected to two connecting members arranged along the second direction (Y), and the base (1) is provided with two long holes extending along the second direction (Y), and a connecting rod which can be rotatably connected to the corresponding connecting member is inserted into each long hole, and the top ends of the two connecting rods are respectively fixedly connected to the third clamping block (221) and the fourth clamping block (222), and the two connecting rods can slide in the corresponding long holes at the same time under the action of the second cylinder (32), so that the third clamping block (221) and the fourth clamping block (222) can simultaneously approach or move away from the workpiece (a) to be detected.

10. The clamp according to claim 9, characterized in that: The base (1) is also provided with two groups of guide members, each group of guide members comprises two guide rods arranged opposite to each other, each guide rod is arranged along the second direction (Y), and the third clamping block (221) and the fourth clamping block (222) are respectively constrained on the two guide rods of the corresponding group of guide members and can slide along the guide rods.

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