Air tightness detection device for water pump of dish washing machine

Abstract

The utility model discloses an air tightness detection device for a water pump of a dish-washing machine. The stand columns are vertically arranged on the base; the upper pressing plate is connected to the top of the stand column; the sealing seat is mounted on the base, the sealing seat is provided with a detection cavity for accommodating a pump body of a water pump to be detected, and the detection cavity is communicated with a vacuum interface; the sealing ring is arranged on the sealing seat, and the sealing ring is suitable for forming airtight sealing with the water pump body placed in the detection cavity; and the downward pressing mechanism is mounted on the upper pressing plate. The beneficial effects of the utility model are that the special test tool provided by the utility model optimizes the sealing / pressurizing mode, significantly shortens the airtightness test time of a single water pump, does not need to be installed on the whole dish-washing machine, simplifies the test process, and greatly improves the overall detection efficiency on a production line.

Description

Technical Field

[0001] This utility model relates to the field of automated testing equipment technology, specifically an airtightness testing device for dishwasher water pumps. Background Technology

[0002] Dishwashers, as essential cleaning appliances in modern kitchens, greatly reduce people's housework burden. One of the core components of a dishwasher is the water pump, whose main function is to circulate and discharge washing water, ensuring that dishes are effectively cleaned. The performance and reliability of the water pump directly affect the overall working efficiency of the dishwasher and the user experience.

[0003] In the manufacturing process of dishwasher water pumps, to ensure product quality and prevent water leakage caused by poor pump body sealing, an airtightness test is usually performed after production. This airtightness test is a crucial step in determining whether the pump body has any potential leakage risks, and it is essential for ensuring the long-term stable operation of the dishwasher.

[0004] However, existing methods for testing the airtightness of dishwasher water pumps have some shortcomings. For example, the traditional approach is to conduct sampling inspections after the water pumps have rolled off the production line. In practice, the sampled pumps often need to be installed on a complete dishwasher or a specialized test bench to simulate actual operating conditions and observe for leaks. This testing method is not only cumbersome and time-consuming, but also inefficient due to the need to install the pumps on the entire machine or complex test bench. Furthermore, the sampling method itself has limitations; it is difficult to comprehensively monitor the quality of all water pumps leaving the factory, potentially allowing pumps with leakage risks to enter the market. Therefore, further improvements are necessary. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a simple, easy-to-use, efficient, and accurate airtightness testing device for dishwasher water pumps.

[0006] The objective of this invention is achieved through the following method: an airtightness testing device for a dishwasher water pump, comprising:

[0007] Base;

[0008] Several columns, which are vertically mounted on the base;

[0009] The upper pressure plate is connected to the top of the column;

[0010] A sealing seat is mounted on the base, the sealing seat having a detection chamber for accommodating the pump body of the water pump to be tested, the detection chamber being connected to a vacuum interface;

[0011] A sealing ring is disposed on the sealing seat, and the sealing ring is adapted to form an airtight seal with the pump body placed in the detection chamber;

[0012] A pressing mechanism is mounted on the upper pressure plate. The pressing mechanism includes a driving member and a pressure plate connected to the driving member. The pressure plate is adapted to move downward to press the tail of the water pump body placed in the detection chamber, thereby pressing the pump body against the sealing ring to achieve a seal in the detection chamber.

[0013] Furthermore: the driving component of the pressing mechanism is a pneumatic cylinder, the cylinder body of the pneumatic cylinder is fixed on the upper pressure plate, the upper pressure plate has a through hole for the piston rod of the pneumatic cylinder to pass through, and the piston rod is connected to the pressure plate.

[0014] Furthermore, an anti-slip pad is installed on the lower end face of the pressure plate.

[0015] Furthermore, the anti-slip mat is made of rubber.

[0016] Furthermore, the sealing seat is provided in two sets, which are symmetrically installed on the base.

[0017] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness. 2. This application proposes a dedicated testing fixture and optimizes the sealing / pressurization method, significantly shortening the airtightness testing time of a single water pump, eliminating the need to install it on the entire dishwasher, simplifying the testing process, and thus greatly improving the overall testing efficiency on the production line.

[0018] 3. Compared with the traditional method that requires the water pump to be installed on the whole machine or a complex test bench, the technical solution of this application is simpler and more convenient to operate, reducing the skill requirements and labor intensity of operators.

[0019] 4. The technical solution of this application has relatively low cost and fast testing speed, making it possible to conduct full inspection of the air tightness of every water pump that comes off the production line. This effectively overcomes the risk of missing unqualified products in traditional sampling inspection methods, thereby more reliably ensuring the sealing performance of the water pumps leaving the factory, preventing water leakage hazards, and improving the reliability of the final product and user satisfaction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the lower pressing mechanism after reset in this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the pressing mechanism after pressing down in this utility model.

[0022] Figure 3 This is a cross-sectional view of the structure of this utility model. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings. A water pump airtightness testing device for a dishwasher includes a base 1; several columns 2 vertically arranged on the base 1; an upper pressure plate 3 connected to the top of the columns 2; a sealing seat 4 mounted on the base 1, the sealing seat 4 having a testing cavity 6 for accommodating the pump body 5 of the water pump to be tested, the testing cavity 6 being connected to a vacuum interface 7; a sealing ring 8 disposed on the sealing seat 4, the sealing ring 8 being adapted to form an airtight seal with the pump body 5 placed in the testing cavity 6; and a lowering mechanism mounted on the upper pressure plate 3, the lowering mechanism including a driving member and a pressure plate 11 connected to the driving member, the pressure plate 11 being adapted to move downwards to press the tail end of the pump body 5 placed in the testing cavity 6, thereby pressing the pump body against the sealing ring 8 to achieve a seal in the testing cavity 6.

[0024] In use, the dishwasher water pump body 5 to be tested is placed into the testing chamber 6 of the sealing seat 4 mounted on the base 1. At this time, the water pump body 5 will initially contact the sealing ring 8 on the sealing seat 4. The base 1, the column 2, and the upper pressure plate 3 together form a stable frame structure, providing support for subsequent pressing and sealing operations.

[0025] During testing, the pressing mechanism mounted on the upper pressure plate 3 is activated. The driving component of the pressing mechanism drives the pressure plate 11 to move downwards. The pressure plate 11 presses down on the tail of the water pump body 5. This downward pressure firmly presses the water pump body 5 against the sealing ring 8 on the sealing seat 4, thus forming a reliable airtight seal between the water pump body 5 and the sealing ring 8. In this way, the testing chamber 6 forms a sealed space relative to the external environment.

[0026] A vacuum pump, pressure source, or airtightness tester can be connected to the vacuum interface 7 on the detection chamber 6. After sealing the detection chamber 6, a vacuum is drawn or a certain pressure of gas is filled in. Then, by monitoring the changes in the vacuum degree or pressure in the chamber, such as pressure drop or vacuum decay rate, it can be determined whether there is a leak in the water pump body 5 and the quality of its airtightness.

[0027] Compared with traditional technologies, this application provides a device specifically designed for testing the airtightness of dishwasher water pumps, avoiding the hassle of installing the water pump into the complex dishwasher unit for testing, greatly simplifying the testing process and improving convenience.

[0028] By applying downward pressure through the pressing mechanism, a stable and reliable airtight seal is formed between the pump body and the sealing ring. This is the basis for conducting accurate airtightness testing and improves the accuracy and reliability of the test.

[0029] In one embodiment, the driving component of the pressing mechanism is a pneumatic cylinder 9. The cylinder body of the pneumatic cylinder 9 is fixed on the upper pressure plate 3. The upper pressure plate 3 has a through hole for the piston rod of the pneumatic cylinder 9 to pass through. The piston rod is connected to the pressure plate 11.

[0030] In this embodiment, the cylinder body of the pneumatic cylinder 9 is fixed on the upper pressure plate 3. When compressed air is supplied to the pneumatic cylinder 9, its piston rod extends, passes through the through hole on the upper pressure plate 3, and pushes the pressure plate 11 connected to it downward, thereby pressing the pump body 5 of the water pump. When the air pressure is released or the air is vented in the opposite direction, the piston rod drives the pressure plate 11 to reset.

[0031] In this embodiment, a pneumatic cylinder is used as the driving component, which facilitates the automated control of the pressing action. Compared with manual screw pressing and other methods, the action speed is fast, the response is rapid, and the testing efficiency is significantly improved. At the same time, the pressure output by the pneumatic cylinder can be precisely controlled by adjusting the air source pressure, thereby applying a stable and appropriate pressing force. This avoids damage to the pump body due to excessive pressure or poor sealing due to insufficient pressure, ensuring the stability and consistency of the test.

[0032] In one embodiment, an anti-slip pad 10 is installed on the lower end face of the pressure plate 11, and the anti-slip pad 10 is made of rubber.

[0033] When the pressing mechanism operates and the pressure plate 11 presses down, the anti-slip pad 10 is the first to contact and press against the tail of the water pump body 5. The anti-slip pad 10 increases the friction between the pressure plate 11 and the water pump body 5, effectively preventing relative sliding or rotation of the water pump body 5 during the pressing process, ensuring the accuracy of the pump body positioning, and helping to form a more reliable seal.

[0034] Typically, the pad has a certain degree of cushioning or is made of a softer material, which can prevent the hard pressure plate 11 from directly contacting the tail of the pump body and causing scratches or indentations, thus protecting the appearance and structural integrity of the test piece.

[0035] Meanwhile, the pad can better adapt to the slight unevenness that may exist at the tail of the pump body, making the pressure distribution more uniform, ensuring that the pump body is stable and does not shift when under pressure, and further protecting the pump body.

[0036] In one embodiment, two sets of sealing seats 4 are provided, symmetrically mounted on the base 1. Two independent sealing seats 4 are installed side-by-side and symmetrically. This means the device has two independent testing stations. Operators can simultaneously place the water pump body at both stations for testing, or perform loading and unloading operations at one station while testing at the other. This achieves double the testing throughput. Operators can alternate between the two stations, or perform automated testing at both stations simultaneously, greatly shortening the overall testing time and improving production or testing efficiency.

[0037] In summary, this invention provides a device specifically designed for testing the airtightness of a dishwasher water pump body. In use, the water pump body 5 to be tested is placed into the detection chamber 6 of one of two symmetrically arranged sealing seats 4 located on the base 1. The corresponding pressing mechanism is activated, with the piston rod driven by the pneumatic cylinder 9, pushing the pressure plate 11 with a rubber anti-slip pad 10 downwards. The pressure plate 11, through the anti-slip pad 10, stably presses against the tail of the water pump body 5, firmly pressing it against the sealing ring 8 on the sealing seat 4, thereby forming a reliable airtight seal around the detection chamber 6. The rubber pad ensures stability during the pressing process and protects the pump body. An external airtightness testing system is connected via a vacuum interface 7 connected to the detection chamber 6. A preset vacuum or positive pressure is applied to the sealed detection chamber 6, and its changes over a certain period are monitored. The stability of the vacuum or pressure is used to determine whether the water pump body 5 is leaking. Because two symmetrical test stations are set up, two water pump bodies can be tested simultaneously, or the pumps can be loaded and unloaded at one station while being tested at the other station, which significantly improves the overall testing efficiency.

[0038] Overall, this utility model solves the problems of cumbersome operation, low efficiency, and dependence on the overall machine environment in the prior art for testing the air tightness of dishwasher water pumps through specialized structural design, pneumatic automatic pressing, reliable sealing method, and dual-station layout. It provides an air tightness testing solution that is convenient to operate, highly automated, accurate and reliable, and significantly improves efficiency, and therefore can be widely promoted and used.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this utility model.

Claims

1. An airtightness testing device for a dishwasher water pump, characterized in that, include: Base (1); Several columns (2) are vertically arranged on the base (1); The upper pressure plate (3) is connected to the top of the column (2); A sealing seat (4) is installed on the base (1). The sealing seat (4) has a detection cavity (6) for accommodating the pump body (5) of the water pump to be tested. The detection cavity (6) is connected to a vacuum interface (7). A sealing ring (8) is disposed on the sealing seat (4), and the sealing ring (8) is adapted to form an airtight seal with the pump body (5) placed in the detection chamber (6); The pressing mechanism is installed on the upper pressure plate (3). The pressing mechanism includes a drive member and a pressure plate (11) connected to the drive member. The pressure plate (11) is adapted to move downward to press the tail of the water pump body (5) placed in the detection chamber (6), thereby pressing the pump body against the sealing ring (8) to achieve the sealing of the detection chamber (6).

2. The airtightness testing device for a dishwasher water pump according to claim 1, characterized in that: The driving component of the pressing mechanism is a pneumatic cylinder (9). The cylinder body of the pneumatic cylinder (9) is fixed on the upper pressure plate (3). The upper pressure plate (3) has a through hole for the piston rod of the pneumatic cylinder (9) to pass through. The piston rod is connected to the pressure plate (11).

3. The airtightness testing device for a dishwasher water pump according to claim 1, characterized in that: The lower end face of the pressure plate (11) is equipped with an anti-slip pad (10).

4. The airtightness testing device for a dishwasher water pump according to claim 3, characterized in that: The anti-slip mat (10) is made of rubber.

5. The airtightness testing device for a dishwasher water pump according to claim 1, characterized in that: The sealing seat (4) is provided in two sets, which are symmetrically installed on the base (1).

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