CN209542025U - A kind of device for testing pump chamber air-tightness - Google Patents

Abstract

The utility model relates to a kind of devices for testing pump chamber air-tightness, when carrying out air-leakage test to water pump using a kind of device of test water pump air-tightness of the utility model, the connection cover of pump chamber oral area is aligned with the circular pit on test platform, so that sealing ring is trapped among around connection cover and contacts with end cap seal；Then water pump cover is compressed using hold-down mechanism, so that sealing ring is by the end cap near water pump oral area and is formed by air cavity between circular pit and seals, the airtight detector is passed through compressed air into the first connecting hole, compressed air enters the gap in air cavity and between end cap and connection cover and enters in pump chamber, if the end cap weld joint air-tight of water pump is bad, compressed gas in pump chamber can be leaked out from the position of poor sealing, then airtight detector will measure pressure drop.

Description

A device for testing the airtightness of water pump cavity

technical field

The utility model relates to a device for testing the airtightness of a cavity of a water pump, in particular to a device for testing the airtightness of an inner cavity of an electronic water pump casing.

Background technique

The electronic water pump is used in automobiles to provide power for the cooling water cycle of the automobile. The housing of the electronic water pump is provided with a mouth connected to the inner cavity, and the mouth is covered with a one-way water-permeable membrane cover plate. The outer side of the plate is provided with an end cover, and the end cover is generally welded to the casing, and the welding between the end cover and the water pump casing has airtightness requirements, but there is no convenient way to detect the airtightness here in the prior art. Permanent device, which makes the production efficiency of electronic water pumps low, and prone to defective products.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a device for testing the airtightness of the water pump cavity, which can conveniently detect the airtightness of the water pump cavity.

In order to achieve the above purpose, the utility model provides a device for testing the airtightness of the water pump cavity, which adopts the following technical scheme: a device for testing the airtightness of the water pump cavity. There is a mouth connected to the water pump cavity, and a connection cover is connected to the mouth. There is a gap leading to the water pump cavity between the connection cover and the end cover, including a test platform and a pressing mechanism connected to the test platform. A first connection hole is provided on the platform, an air tightness detector is connected to the first connection hole, a circular pit is provided on the test platform, and a second connection hole communicating with the first connection hole is provided in the circular pit. There is a sealing ring around the outer side of the circular pit;

When testing the airtightness of the water pump cavity, the connecting cover at the mouth of the pump cavity is aligned with the circular pit, the sealing ring surrounds the connecting cover and is in sealing contact with the end cover, and the sealing ring is located on the outer edge of the connecting cover Between the welding seam and the end cap; the air tightness detector passes compressed air into the first connection hole and detects the pressure drop.

Preferably, the pressing mechanism includes a stand connected with a vertically extending slide rod, the stand is provided with a vertically extending guide hole, the slide rod is slidably connected in the guide hole, the slide rod The lower end is provided with a pressing block, and the pressing block presses the water pump housing on the test platform.

More preferably, the upper end of the sliding rod is provided with a cam pressing block, the cam surface of the cam pressing block is in sliding contact with the upper end of the sliding rod, the cam pressing block is hinged on the stand, and an operating handle is connected to the cam pressing block, and the rotating The operating handle can drive the cam pressing block to rotate and drive the sliding rod to slide in the guide hole.

More preferably, a compression spring is sheathed on the sliding rod, the upper end of the compression spring abuts against the sliding rod, and the lower end of the compression spring abuts against the stand.

More preferably, the lower surface of the pressing block is connected with a plurality of pressing rods, and the water pump housing is provided with a plurality of bolt bosses, and the lower end of each pressing rod is pressed on each bolt boss.

Preferably, the pressing block is circular, and the center of the pressing block is provided with a threaded hole, and the lower end of the sliding rod is screwed into the threaded hole.

Preferably, a D-shaped pit is provided on the outside of the circular pit, the sealing ring is D-shaped, and the sealing ring is arranged in the D-shaped pit.

Preferably, the pressure of the compressed air fed into the first connection hole by the air tightness detector is 0.5 bar.

Preferably, the mouth of the water pump casing is covered with a one-way water-permeable membrane cover plate, and the water-permeable membrane cover plate is located under the connection cover.

Preferably, the connection cover is welded on the water pump casing.

As mentioned above, the utility model relates to a device for testing the airtightness of the water pump cavity, which has the following beneficial effects: when using the device for testing the airtightness of the water pump in the utility model to detect the airtightness of the water pump, the The connection cover at the mouth of the water pump cavity is aligned with the circular pit on the test platform, so that the sealing ring surrounds the connection cover and is in sealing contact with the end cover; then use the compression mechanism to compress the water pump casing, so that The sealing ring seals the air cavity formed between the end cover near the water pump mouth and the circular pit, and the air tightness detector passes compressed air into the first connection hole, and the compressed air enters the air cavity and enter the water pump cavity from the gap between the end cover and the connecting cover. If the airtightness of the weld seam of the end cover of the water pump is poor, the compressed gas in the water pump cavity will leak from the poorly sealed position. The meter will measure the pressure drop. It can be seen that the device for testing the airtightness of the water pump cavity of the utility model can conveniently detect the airtightness of the water pump cavity, and has a simple structure and is easy to use.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a device for testing the airtightness of a water pump cavity according to the present invention.

Figure 2 shows a schematic diagram of the connection structure between the sliding rod and the stand.

Figure 3 is a schematic diagram of the structure of the test platform.

Fig. 4 is a structural schematic diagram of the water pump housing.

Fig. 5 is a schematic structural diagram of the water pump housing.

Component designation description

1 Water pump housing

2 pump cavity

3 mouth

4 Connection cover

5 Test platform

6 Pressing mechanism

7 first connecting hole

8 positioning pin

9 round dimples

10 Second connecting hole

11 sealing ring

12 stand

13 sliding bar

14 Pilot hole

15 compression block

16 Cam block

17 Operating handle

18 compression spring

19 Compression rod

20 Bolt Boss

21 threaded hole

22 D-shaped dimples

23 one-way permeable membrane cover

24 air cavity

25 end cap

Detailed ways

The implementation of the present utility model is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the utility model Therefore, it has no technical substantive meaning. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of The technical content disclosed by the utility model must be within the scope covered. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable range of the utility model, and the change or adjustment of its relative relationship, without any substantial change in the technical content, shall also be regarded as the practicable scope of the utility model.

As shown in Figures 1 to 3, the utility model provides a device for testing the airtightness of the water pump cavity. The water pump casing 1 is welded with an end cover 25, and the end cover 25 is provided with a port communicating with the water pump cavity 2. Part 3, a connection cover 4 is connected to the mouth part 3, and there is a gap leading to the water pump cavity 2 between the connection cover 4 and the end cover 25, including a test platform 5 and a pressing mechanism 6 connected to the test platform 5, testing Platform 5 is provided with first connection hole 7, is connected with airtight detector on the first connection hole 7, is provided with a circular pit 9 on test platform 5, is provided with first connection hole 7 in circular pit 9 The connected second connecting hole 10 has a sealing ring 11 around the outer side of the circular pit 9;

When testing the airtightness of the water pump cavity 2, the connection cover 4 of the mouth 3 of the water pump cavity 2 is aligned with the circular pit 9, and the sealing ring 11 surrounds the connection cover 4 and is in sealing contact with the end cover 25, The sealing ring 11 is located between the outer edge of the connection cover 4 and the weld seam A (see FIG. 5 ) of the end cover 25; the air tightness detector passes compressed air into the first connection hole 7 and detects the pressure drop.

When using a device for testing the airtightness of the water pump of the present utility model to detect the airtightness of the water pump, align the connection cover 4 of the mouth 3 of the water pump cavity 2 with the circular pit 9 on the test platform 5, so that The sealing ring 11 surrounds the connection cover 4 and is in sealing contact with the end cover 25; then, the water pump casing 1 is compressed by the pressing mechanism 6, so that the sealing ring 11 connects the end cover 25 near the water pump mouth 3 with the round The air cavity 24 formed between the pits 9 is sealed, and the air tightness tester feeds compressed air into the first connection hole, and the compressed air enters the air cavity 24 and passes through the end cover 25 and the connection cover 4. The gap between them enters into the water pump cavity 2. If the weld seam of the end cover 25 of the water pump is not airtight, the compressed gas in the water pump cavity 2 will leak from the poorly sealed position, and the air tightness detector will detect pressure drop. It can be seen that the device for testing the airtightness of the water pump cavity of the present utility model can conveniently test the airtightness of the water pump cavity 2, and has a simple structure and is easy to use.

As shown in Figure 5, the mouth 3 of the water pump housing 1 is covered with a one-way water-permeable membrane cover plate 23, which is located below the connecting cover 4, and the one-way water-permeable membrane cover plate 23 is to prevent the water pump chamber from The liquid in the body 2 leaks outward, and the connection cover 4 is generally welded on the end cover 25 by welding. There is a gap leading to the water pump cavity 2 between the connection cover 4 and the end cover 25, and the one-way water-permeable membrane 23 can make air through.

In a device for testing the airtightness of water pumps of the present utility model, the airtight detector injects compressed air into the air cavity 24 through the first connection hole 7 and the second connection hole 10, if the welding of the end cover 25 is airtight If the performance is good, the gas in the water pump cavity 2 will not leak out. If the welding airtightness of the end cover 25 is not good, the gas in the water pump cavity 2 will leak out and the air pressure in the water pump cavity 2 will be reduced, thereby transferring to The air tightness detector, the air tightness detector can detect the pressure drop. Generally, the pressure of the compressed air fed into the first connection hole 7 by the air tightness detector is about 0.5 bar.

In a device for testing the airtightness of a water pump in the present invention, the water pump casing 1 is pressed against the test platform 5 by using the pressing mechanism 6, as a preferred embodiment, as shown in Figure 1 and Figure 2 , the pressing mechanism 6 includes a stand 12 connected with a vertically extending slide bar 13, the stand 12 is provided with a vertically extending guide hole 14, the slide bar 13 is slidably connected to the guide In the hole 14 , a pressing block 15 is provided at the lower end of the sliding rod 13 , and the pressing block 15 presses the water pump housing 1 onto the test platform 5 . As shown in Figure 2, the upper end of described sliding bar 13 is provided with a cam pressing block 16, and the cam surface of cam pressing block 16 is in sliding contact with the upper end of sliding bar 13, and cam pressing block 16 is hinged on the stand 12, and cam pressing block 16 is connected with an operating handle 17 , rotating the operating handle 17 can drive the cam pressing block 16 to rotate and drive the sliding rod 13 to slide in the guide hole 14 . Depressing the operating handle 17 can make the cam pressing block 16 rotate and press the sliding rod 13 downward, thereby driving the pressing block 15 to press the water pump housing 1 downward, and the gravity generated by the operating handle 17 makes the cam pressing block 16 Rotate toward the direction that slide bar 13 is pressed down, even after operator's hand leaves operating handle 17, under the action of gravity of operating handle 17, cam pressing block 16 can still keep the state of pressing slide bar 13 and can not loosen, In addition, the cam surface of the cam pressing block 16 has a self-locking effect, which can prevent the water pump casing 1 from loosening and causing poor sealing of the sealing ring 11 .

When the operating handle 17 is released, in order to make the sliding rod 13 automatically move up and return to the initial position, the sliding rod 13 is covered with a compression spring 18, the upper end of the compression spring 18 is against the sliding rod 13, and the compression spring 18 The lower end rests on the stand 12. In this way, after the operating handle 17 is released, under the drive of the compression spring 18, the sliding rod 13 moves upwards to drive the pressing block 15 to move upwards and loosen the water pump casing 1 .

In order to make the water pump housing 1 evenly pressed on the test platform 5, as shown in Figure 1 and Figure 2, as a preferred embodiment, the lower surface of the pressing block 15 is connected with a plurality of pressing rods 19. The compression rod 19 extends vertically and is perpendicular to the test platform 5. A plurality of bolt bosses 20 are arranged on the water pump housing 1, and the lower ends of each compression rod 19 are pressed against each bolt boss 20. The bolt bosses 20 are divided around the mouth 3 of the water pump housing 1, so that the force of the pressing block 15 acting on the water pump housing 1 is relatively uniform, so that the sealing ring 11 is evenly compressed. In addition, in order to facilitate the adjustment of the initial height position of the pressing block 15, as shown in Figure 1, the pressing block 15 is circular, and the center of the pressing block 15 is provided with a threaded hole 21, and the lower end of the sliding rod 13 is threaded. Connected in the threaded hole 21. In this way, the height position of the compression block 15 can be adjusted by rotating the compression block 15, thereby adjusting the final height position of the lower end of the compression rod 19, so that the compression amount of the sealing ring 11 can be adjusted.

In order to prevent the sealing ring 11 from sliding and shifting during the compression process, the position of the sealing ring 11 needs to be fixed. As a preferred embodiment, as shown in FIG. D-shaped pit 22 , the sealing ring 11 is D-shaped, and the sealing ring 11 is arranged in the D-shaped pit 22 . In this way, when the compression mechanism 6 compresses the water pump housing 1, the water pump housing 1 compresses the seal ring 11 in the D-shaped pit 22, and the edge of the seal ring 11 contacts the inner edge of the D-shaped pit 22, The inner edge of the D-shaped dimple 22 can limit the sliding deviation of the sealing ring 11 . In addition, in order to prevent the water pump housing 1 from laterally slipping when it is pressed, as a preferred embodiment, as shown in FIG. The positioning hole (not shown) that matches with the positioning pin 8, when the water pump casing 1 is placed on the test platform 5, the positioning pin 8 is inserted into the positioning hole on the water pump casing 1, and then the water pump casing The body 1 slides down and is placed on the test platform 5, and the connection cover 4 on the water pump casing 1 is just located in the circular pit 9.

Based on the technical solutions of the above embodiments, a device for testing the airtightness of water pumps in the present invention can conveniently test the airtightness of the water pump cavity, thereby improving the production efficiency and product qualification rate of the water pump casing 1. The device is easy to operate and easy to use.

To sum up, the utility model effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (10)

1. a kind of device for testing pump chamber air-tightness, is welded with end cap (25) on water pump cover (1), end cap (25) is equipped with The oral area (3) being connected to pump chamber (2) is connected with a connection cover (4) on oral area (3), between connection cover (4) and end cap (25) With the gap for leading to pump chamber (2), characterized in that including test platform (5) and the compression being connected on test platform (5) Mechanism (6), test platform (5) are equipped with the first connecting hole (7), and airtight detector is connected on the first connecting hole (7), and test is flat Platform (5) is equipped with a circular pit (9), and the second connecting hole being connected to the first connecting hole (7) is equipped in circular pit (9) (10), a sealing ring (11) are on the outside of circular pit (9)；

When detecting pump chamber (2) air-tightness, the connection cover (4) of pump chamber (2) oral area (3) is aligned with circular pit (9), institute It states sealing ring (11) and is trapped among around connection cover (4) and in sealing contact with end cap (25), sealing ring (11) is located at connection cover (4) Between outer edge and the weld seam of end cap (25)；The airtight detector is passed through compressed air in the first connecting hole (7) and detects Pressure drop.

2. the device of test pump chamber air-tightness according to claim 1, it is characterised in that: the hold-down mechanism (6) Including with stand (12), being connected with a sliding bar (13) extended vertically in stand (12), stand (12) is equipped with vertical extend Pilot hole (14), the sliding bar (13) is slidably connected in pilot hole (14), and the lower end of sliding bar (13) is equipped with compact heap (15), water pump cover (1) is pressed on test platform (5) by the compact heap (15).

3. the device of test pump chamber air-tightness according to claim 2, it is characterised in that: the sliding bar (13) Upper end is equipped with a cam briquetting (16), the cam surface of cam briquetting (16) and the upper end sliding contact of sliding bar (13), cam pressure Block (16) is hinged on stand (12), and an operation handle (17) are connected on cam briquetting (16), rotate the operation handle (17) it is able to drive cam briquetting (16) rotation and drives sliding bar (13) sliding in pilot hole (14).

4. the device of test pump chamber air-tightness according to claim 2, it is characterised in that: on the sliding bar (13) It is cased with compressed spring (18), the upper end of compressed spring (18) is against on sliding bar (13), and the lower end of compressed spring (18) is against vertical On frame (12).

5. the device of test pump chamber air-tightness according to claim 2, it is characterised in that: the compact heap (15) Lower surface is connected with more compressor arms (19), and water pump cover (1) is equipped with multiple bolt boss (20), under each compressor arm (19) End branch is pressed on each bolt boss (20).

6. the device of test pump chamber air-tightness according to claim 2, it is characterised in that: the compact heap (15) is The center of circle, compact heap (15) is equipped with a threaded hole (21), and the lower thread of the sliding bar (13) is connected to threaded hole (21) in.

7. the device of test pump chamber air-tightness according to claim 1, it is characterised in that: the circular pit (9) Outside be equipped with a D-shaped pit (22), the sealing ring (11) is D-shaped, sealing ring (11) be set to D-shaped pit (22) in.

8. it is according to claim 1 test pump chamber air-tightness device, it is characterised in that: the airtight detector to The compressed air pressure being passed through in first connecting hole (7) is 0.5bar.

9. the device of test pump chamber air-tightness according to claim 1, it is characterised in that: the water pump cover (1) Oral area (3) capping have a Unidirectional water permeable membrane cover plate (23), water permeable membrane cover board is located at connection cover (4) lower section.

10. the device of test pump chamber air-tightness according to claim 1, it is characterised in that: connection cover (4) weldering It connects on water pump cover (1).