Airtight test fixture for pump housing of dish-washing machine

Abstract

The utility model discloses a dish-washing machine pump housing airtightness test tool, which relates to the technical field of airtightness test, and comprises a lower jig, an upper jig and a dish-washing machine pump housing body, and further comprises a pressing tool arranged on the lower jig and the upper jig and used for positioning the dish-washing machine pump housing body; the detection mechanism is arranged on the pressing tool and is used for testing the air tightness of the dishwasher pump shell body; the pressing tool comprises a supporting column, the supporting column is fixed to the top of a lower jig, two sets of limiting columns are installed on the top of the lower jig, and an extrusion part is installed at the bottom of an upper jig; wherein the detection mechanism comprises a pneumatic cylinder, the pneumatic cylinder is fixed to the top of the lower jig, the end of the pneumatic cylinder is connected with a sealing gasket, set pressure is applied to the interior of the dishwasher pump shell body through an air inlet hole and an air outlet hole, and a pressure sensor in an airtight instrument detects the pressure change of a cavity, calculates a leakage value and judges whether a product is qualified or not.

Description

Technical Field

[0001] The utility model relates to the technical field of airtightness testing, in particular to an airtightness testing jig for a dishwasher pump housing. Background Art

[0002] A dishwasher is a device used to automatically wash bowls, chopsticks, plates, dishes, knives, forks and other tableware. It reduces the labor intensity for cooks in restaurants, hotels, and canteens of government agencies, improves work efficiency, and promotes cleanliness and hygiene.

[0003] The dishwasher pump housing is made of an engineering plastic material. Due to structural reasons, the top position needs to be ultrasonically welded, and the welding parts need to be tested to see if they are qualified. Since the sealing of the part that needs to be tested is very difficult, and no similar product seals have been found so far, the product can only be assembled into the machine, water added, and run to observe whether the part will leak. After the water test, the water on the surface of the product needs to be wiped clean. Therefore, each inspection of the dishwasher pump housing is more cumbersome. Utility Model Content

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide an airtightness test fixture for a dishwasher pump housing.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a dishwasher pump housing airtightness test jig, comprising a lower jig, an upper jig, and a dishwasher pump housing body, and further comprising:

[0006] A pressing tool, which is provided on the lower jig and the upper jig and is used to position the dishwasher pump housing body;

[0007] A testing mechanism, which is provided on the pressing fixture and is used to test the air tightness of the dishwasher pump housing;

[0008] The pressing tooling includes a support column fixed to the top of the lower jig, two sets of limit columns are installed on the top of the lower jig, and an extrusion piece is installed on the bottom of the upper jig;

[0009] Among them, the detection mechanism includes a pneumatic cylinder, which is fixed on the top of the lower jig, and a sealing gasket is connected to the end of the pneumatic cylinder. An air outlet is opened inside the support column, and an air inlet is opened on one side of the lower jig.

[0010] As mentioned above, the upper jig cooperates with an external pneumatic cylinder to control the up and down movement, and the bottom surface of the extrusion piece is in compression contact with the dishwasher pump housing body.

[0011] As mentioned above, the top end of the support column and the extrusion piece are both made of rubber, and the top end of the support column is in extrusion contact with the inner wall of the dishwasher pump housing.

[0012] As mentioned above, the air inlet is connected to the air outlet, the air outlet is connected to the interior of the dishwasher pump housing, and the air inlet is connected to an external airtightness meter.

[0013] As mentioned above, the limiting posts block both sides of the outer periphery of the dishwasher pump housing body and fit with the surface of the dishwasher pump housing body.

[0014] As mentioned above, the sealing gasket is in extrusion contact with the side hole of the dishwasher pump housing body. When the extrusion piece extrudes the dishwasher pump housing body, the dishwasher pump housing body is tightly fitted with the lower jig, and the contact surface between the dishwasher pump housing body and the lower jig is bonded with silicone.

[0015] Compared with the existing technology, this dishwasher pump housing airtightness test fixture has the following beneficial effects:

[0016] 1. The utility model positions the dishwasher pump housing body through an extrusion piece and a support column, and seals the bottom of the dishwasher pump housing body through the cooperation between the dishwasher pump housing body and the lower jig. At this time, the operation of the pneumatic cylinder can control the sealing gasket to seal the side hole of the dishwasher pump housing body. At the same time, an airtightness meter can be used to press the set pressure into the interior of the dishwasher pump housing body through the air inlet and air outlet through the precision pressure reducing valve. The pressure sensor in the airtightness meter detects the cavity pressure change, calculates the leakage value, and determines whether the product is qualified.

[0017] 2. The present invention can accurately place the dishwasher pump housing body on the lower jig through the limiting columns and the support columns. At the same time, the upper jig is controlled to move downward by the external pneumatic cylinder, so that the dishwasher pump housing body is squeezed by the extrusion piece, and the inner wall of the dishwasher pump housing body is supported by the support columns, thereby stably fixing the dishwasher pump housing body and avoiding deformation of the dishwasher pump housing body caused by the extrusion piece squeezing the dishwasher pump housing body.

[0018] Other advantages, objectives and features of the present invention will be described in part in the following description and will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the disassembly structure of the lower jig and the upper jig of the utility model;

[0021] Figure 3 It is a schematic cross-sectional structural diagram of the side of the utility model.

[0022] In the figure: 1. Lower jig; 2. Upper jig; 3. Dishwasher pump housing; 4. Limit column; 5. Support column; 6. Extrusion part; 7. Air outlet; 8. Air inlet; 9. Pneumatic cylinder; 10. Sealing gasket. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1-3 As shown, the utility model provides a dishwasher pump housing airtightness test jig, including a lower jig 1, an upper jig 2 and a dishwasher pump housing body 3, and also includes:

[0025] A pressing tool, which is provided on the lower jig 1 and the upper jig 2 and is used to position the dishwasher pump housing body 3;

[0026] A testing mechanism, which is provided on the pressing tool and is used to test the air tightness of the dishwasher pump housing body 3;

[0027] The pressing tooling includes a support column 5, which is fixed to the top of the lower jig 1. Two sets of limit columns 4 are installed on the top of the lower jig 1, and an extrusion piece 6 is installed on the bottom of the upper jig 2.

[0028] Among them, the detection mechanism includes a pneumatic cylinder 9, which is fixed on the top of the lower jig 1. The end of the pneumatic cylinder 9 is connected to a sealing gasket 10. An air outlet 7 is opened inside the support column 5, and an air inlet 8 is opened on one side of the lower jig 1.

[0029] Through the limiting column 4 and the supporting column 5, the dishwasher pump housing body 3 can be accurately placed on the lower jig 1, and at the same time, the upper jig 2 is controlled to move downward by the external pneumatic cylinder, so that it squeezes the dishwasher pump housing body 3 through the extrusion piece 6, and supports the inner wall of the dishwasher pump housing body 3 through the supporting column 5, so that the dishwasher pump housing body 3 can be stably fixed, and the dishwasher pump housing body 3 can be prevented from being deformed by excessive pressure. At this time, through the operation of the pneumatic cylinder 9, the sealing gasket 10 can be controlled to seal the side hole of the dishwasher pump housing body 3. At this time, the airtightness instrument can be used to pass through the precision pressure reducing valve through the air inlet hole 8 and the air outlet hole 7 to flush the set pressure into the interior of the dishwasher pump housing body 3. The pressure sensor in the airtightness instrument detects the cavity pressure change, calculates the leakage value, and determines whether the product is qualified.

[0030] like Figure 2 、 3 As shown, the upper jig 2 cooperates with an external pneumatic cylinder to control the up and down movement, and the bottom surface of the extrusion member 6 is in compression contact with the dishwasher pump housing body 3.

[0031] By controlling the upper jig 2 to move up and down, the extrusion member 6 can be driven to squeeze and limit the dishwasher pump housing body 3, and the upper jig 2 can be controlled to rise to facilitate the removal of the dishwasher pump housing body 3.

[0032] like Figure 3 As shown, the top end of the support column 5 and the extrusion piece 6 are both made of rubber, and the top end of the support column 5 is in extrusion contact with the inner wall of the dishwasher pump housing 3 .

[0033] Through the design of the support column 5 and the extrusion piece 6, since the top end of the support column 5 and the extrusion piece 6 are made of rubber, when they are squeezed with the dishwasher pump housing body 3, wear on the dishwasher pump housing body 3 is avoided.

[0034] like Figure 1 、 3 As shown, the air inlet 8 is connected to the air outlet 7, the air outlet 7 is connected to the interior of the dishwasher pump housing 3, and the air inlet 8 is connected to an external airtightness tester.

[0035] Through the coordination between the air inlet 8 and the air outlet 7 , the airtightness tester can control the input pressure of the cavity formed between the dishwasher pump housing body 3 and the lower jig 1 , thereby facilitating the control of the airtightness of the cavity inside the dishwasher pump housing body 3 .

[0036] like Figure 1 、 2 As shown, the limiting posts 4 block both sides of the outer periphery of the dishwasher pump housing 3 and fit in with the surface of the dishwasher pump housing 3 .

[0037] The cooperation between the limiting column 4 and the dishwasher pump housing body 3 can limit the position of the dishwasher pump housing body 3 on the top of the lower jig 1, thereby preventing the dishwasher pump housing body 3 from being shifted when the dishwasher pump housing body 3 is squeezed.

[0038] like Figure 1 、 3 As shown, the sealing gasket 10 is in squeeze contact with the side hole of the dishwasher pump housing body 3. When the extrusion member 6 squeezes the dishwasher pump housing body 3, the dishwasher pump housing body 3 is tightly fitted with the lower jig 1, and the contact surface of the dishwasher pump housing body 3 and the lower jig 1 is bonded with silicone.

[0039] By operating the pneumatic cylinder 9, the position of the sealing gasket 10 can be adjusted, so that the side hole of the dishwasher pump housing body 3 can be squeezed by the sealing gasket 10, which facilitates sealing the side hole of the dishwasher pump housing body 3. At the same time, since the contact surface between the dishwasher pump housing body 3 and the lower jig 1 is bonded with silicone, the bottom of the dishwasher pump housing body 3 can be sealed when the extrusion piece 6 squeezes the dishwasher pump housing body 3.

[0040] Working principle:

[0041] First, place the dishwasher pump housing body 3 on the lower jig 1, and limit the position of the dishwasher pump housing body 3 by the support column 5 and the limit column 4. Then, the upper jig 2 is controlled to move downward by the external pneumatic cylinder, so that it squeezes the dishwasher pump housing body 3 through the extrusion piece 6, and supports the inner wall of the dishwasher pump housing body 3 through the support column 5, so that the dishwasher pump housing body 3 can be stably fixed, and the dishwasher pump housing body 3 can be prevented from being deformed by excessive pressure. At this time, through the operation of the pneumatic cylinder 9, the sealing gasket 10 can be controlled to seal the side hole of the dishwasher pump housing body 3. Finally, the set pressure can be injected into the interior of the dishwasher pump housing body 3 through the precision pressure reducing valve through the air inlet hole 8 and the air outlet hole 7 using an airtightness meter. The pressure sensor in the airtightness meter detects the pressure change in the cavity, calculates the leakage value, and determines whether the product is qualified.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dishwasher pump housing airtightness test jig, comprising a lower jig (1), an upper jig (2) and a dishwasher pump housing body (3), characterized in that: Also includes: A pressing tool, which is provided on the lower jig (1) and the upper jig (2) and is used to position the dishwasher pump housing body (3); A testing mechanism, which is provided on the pressing tool and is used to test the air tightness of the dishwasher pump housing body (3); The pressing tool comprises a support column (5), the support column (5) is fixed on the top of the lower jig (1), two groups of limit columns (4) are installed on the top of the lower jig (1), and an extrusion piece (6) is installed on the bottom of the upper jig (2); The detection mechanism includes a pneumatic cylinder (9), which is fixed on the top of the lower jig (1), and a sealing gasket (10) is connected to the end of the pneumatic cylinder (9). An air outlet (7) is provided inside the support column (5), and an air inlet (8) is provided on one side of the lower jig (1).

2. The dishwasher pump housing airtightness test fixture according to claim 1, characterized in that: The upper jig (2) cooperates with an external pneumatic cylinder to control the up and down movement, and the bottom surface of the extrusion member (6) is in extrusion contact with the dishwasher pump housing body (3).

3. The dishwasher pump housing airtightness test fixture according to claim 1, characterized in that: The top end of the support column (5) and the extrusion piece (6) are both made of rubber, and the top end of the support column (5) is in extrusion contact with the inner wall of the dishwasher pump housing (3).

4. The dishwasher pump housing airtightness test fixture according to claim 1, characterized in that: The air inlet (8) is connected to the air outlet (7), the air outlet (7) is connected to the interior of the dishwasher pump housing (3), and the air inlet (8) is connected to an external airtightness meter.

5. The dishwasher pump housing airtightness test fixture according to claim 1, characterized in that: The limiting columns (4) block both sides of the outer periphery of the dishwasher pump housing body (3) and fit in contact with the surface of the dishwasher pump housing body (3).

6. The dishwasher pump housing airtightness test fixture according to claim 1, characterized in that: The sealing gasket (10) is in extrusion contact with the side hole of the dishwasher pump housing body (3); when the extrusion member (6) extrudes the dishwasher pump housing body (3), the dishwasher pump housing body (3) and the lower jig (1) are tightly fitted, and the contact surfaces of the dishwasher pump housing body (3) and the lower jig (1) are bonded with silicone.

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