Air tightness detection device

Abstract

The invention relates to an air tightness detection device which comprises a water containing seat, a clamping seat and a pressure measuring assembly, a water storage tank is formed in the water containing seat, the clamping seat comprises a base, a pressing rod and a first driving part, a containing groove is formed in the base, the pressure measuring assembly comprises a connecting pipe and a pressure gauge, and an air nozzle is arranged on the connecting pipe. When the air tightness needs to be detected, the motor body and the bearing seat are placed in the storage groove, the pressing rod abuts against the motor body and the bearing seat, the motor body and the bearing seat are locked, then the connecting pipe is connected into the air inlet in a threaded mode, the air nozzle is inflated, and whether the air pressure meets the requirement or not is observed through the pressure gauge. Then the clamping seat and the pressure measuring assembly are placed in the water storage tank together, whether bubbles are generated on the water surface is observed after standing for a period of time so as to judge whether the air tightness meets the requirement, inflation is convenient, operation is simple, and the air tightness of the interior of the motor body and the air tightness of the oil chamber are more convenient to detect.

Description

Technical Field

[0001] The present application relates to the field of detection equipment, and in particular to an airtightness detection device. Background Art

[0002] A submersible pump is an important device for lifting water from deep wells. When in use, the entire unit is submerged in water to extract groundwater to the ground surface, and it is applicable to fields such as domestic water use, mine rescue, industrial cooling, farmland irrigation, seawater lifting, and ship load adjustment.

[0003] As Figure 1 and Figure 2 shown, a submersible pump includes a pump body 8 and a motor assembly 9 installed in the pump body 8. The motor assembly 9 includes a motor body 91 and a bearing seat 92 distributed along the axis of the pump body 8. An oil chamber 10 is formed by splicing the bearing seat 92 and the motor body 91. Two air inlets 921 are opened on the outer side wall of the bearing seat 92 away from the motor body 91. One of the air inlets 921 communicates with the inside of the motor body 91, and the other air inlet 921 communicates with the oil chamber 10.

[0004] In actual production, after the motor body and the bearing seat are respectively assembled, it is necessary to detect the airtightness of the inside of the motor body and the oil chamber. Since the motor body and the bearing seat cannot be bolted together, it is difficult to inject gas for airtightness detection later, which needs to be improved. Summary of the Invention

[0005] In order to improve the problem that it is difficult to inject gas for airtightness detection later due to the inability to bolt the motor body and the bearing seat together, the present application provides an airtightness detection device.

[0006] An airtightness detection device provided by the present application adopts the following technical solution: An airtightness detection device includes a water holding seat, a clamping seat, and a pressure measuring component. A water storage tank is opened on the water holding seat. The clamping seat includes a base, a pressing rod slidably connected to the base, and a driving member I provided on the base. A placement groove is opened on the base, and the pressing rod extends into the placement groove. The driving member I drives the pressing rod to slide close to or away from the placement groove. The pressure measuring component includes a connecting pipe and a pressure gauge provided on the connecting pipe. The connecting pipe is used for threaded connection into the air inlet. A gas nozzle is provided on the connecting pipe. When inflating the gas nozzle, the pressure gauge on the connecting pipe connected to one of the air inlets is used to detect the air pressure inside the motor body, and the pressure gauge on the connecting pipe connected to the other air inlet is used to detect the air pressure inside the oil chamber.

[0007] By adopting the above technical solution, when airtightness detection is required, the motor body and the bearing seat are placed in the placing groove. The first driving member drives the pressing rod to move closer to the motor body and the bearing seat in the placing groove, so that the pressing rod abuts against the motor body and the bearing seat, locking the motor body and the bearing seat together. Then, two connecting pipes are respectively threadedly connected to the two air inlets, and air is inflated into the air nozzle. The air pressure inside the motor body and the oil chamber is observed through the pressure gauge to see if it meets the requirements. Then, the clamping seat and the pressure measuring assembly are placed in the water storage tank together, so that the motor body and the bearing seat are immersed underwater. After standing for a period of time, whether there are bubbles on the water surface is observed. The standing time can be determined according to actual needs. If there are bubbles, the airtightness does not meet the requirements; if there are no bubbles, the airtightness meets the requirements. It is convenient to inflate and the operation is simple, making it more convenient to detect the airtightness of the inside of the motor body and the oil chamber.

[0008] Optionally, a lifting plate is slidably lifted on the water holding seat. The lifting plate is used to place the clamping seat. The water storage tank is provided for the lifting plate to be inserted into. A driving assembly for driving the lifting plate to lift and lower is provided on the water holding seat.

[0009] By adopting the above technical solution, the lifting plate and the driving assembly are provided. The clamping seat has a certain weight, and it is inconvenient to manually carry and move. After placing the clamping seat on the lifting plate, the driving assembly drives the lifting plate to lift and lower to take out the clamping seat from the water storage tank or immerse the clamping seat under the water surface in the water storage tank, making it more convenient to move the clamping seat.

[0010] Optionally, the driving assembly includes a lead screw rotatably connected in the water holding seat and a second driving member provided on the water holding seat. The lead screw is threadedly connected to the lifting plate, and the second driving member drives the lead screw to rotate.

[0011] By adopting the above technical solution, the lifting and lowering of the lifting plate is realized through the threaded cooperation between the rotating lead screw and the lifting plate.

[0012] Optionally, a limiting rod is provided in the water holding seat. The limiting rod is located on both sides of the lead screw and penetrates through the lifting plate.

[0013] By adopting the above technical solution, the limiting rod is provided. The lifting plate is limited by the limiting rods on both sides of the lead screw penetrating through the lifting plate to prevent the lifting plate from rotating.

[0014] Optionally, a plurality of water draining holes are formed in the lifting plate.

[0015] By adopting the above technical solution, the water draining holes are provided. When the lifting plate moves under the water surface, the contact area between the lifting plate and the water is reduced, thereby reducing the resistance to the rotation of the lead screw.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. When airtightness needs to be detected, place the motor body and the bearing housing in the placement groove, press the lever against the motor body and the bearing housing to lock them between the motor body and the bearing housing. Then, thread the connecting pipe into the air inlet, inflate the air nozzle, observe whether the air pressure reaches the requirement through the pressure gauge, and then place the clamping seat and the pressure measuring component together in the water storage tank. After standing for a period of time, observe whether there are bubbles on the water surface to determine whether the airtightness meets the requirement. The inflation is convenient and the operation is simple, making it more convenient to detect the airtightness inside the motor body and the oil chamber; 2. Drive the lifting plate to lift and lower through the driving component to take out the clamping seat from the water storage tank or immerse the clamping seat under the water surface in the water storage tank, making it more convenient to move the clamping seat; 3. By setting the limiting rod, the lifting plate is limited by the limiting rods on both sides of the lead screw passing through the lifting plate to prevent the lifting plate from rotating. Description of the Drawings

[0017] Figure 1 It is a sectional view of a submersible pump in the related art.

[0018] Figure 2 It is a partial structural diagram of a submersible pump in the related art.

[0019] Figure 3 It is an overall schematic diagram of an embodiment of the present application.

[0020] Figure 4 It is an overall schematic diagram of another perspective of an embodiment of the present application, mainly showing the structure of the drain holes.

[0021] Figure 5 It is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the clamping seat.

[0022] Figure 6 It is a structural diagram of a partial use of an embodiment of the present application, mainly showing the structure of the pressure measuring component.

[0023] Figure 7 It is a structural diagram of an embodiment of the present application cut open at the water holding seat, mainly showing the structure of the driving component.

[0024] Description of the Reference Numerals: 1. Water holding seat; 11. Water storage tank; 12. Accommodation cavity; 2. Clamping seat; 21. Base; 211. Placement groove; 22. Lever; 23. Driving part one; 3. Pressure measuring component; 31. Connecting pipe; 32. Pressure gauge; 4. Air nozzle; 5. Lifting plate; 51. Sliding part; 52. Connecting part; 53. Placement part; 531. Drain hole; 6. Limiting rod; 7. Driving component; 71. Lead screw; 72. Driving part two; 8. Pump body; 9. Motor assembly; 91. Motor body; 92. Bearing housing; 921. Air inlet; 10. Oil chamber. Detailed Embodiments

[0025] The following will further elaborate on this application in conjunction with the accompanying Figures 1-7 drawings.

[0026] In the related art, a submersible pump, see Figures 1-2 , includes a pump body 8 and a motor assembly 9 installed inside the pump body 8. The motor assembly 9 includes a motor body 91 and a bearing seat 92 distributed along the axis of the pump body 8. An oil chamber 10 is formed by splicing the bearing seat 92 and the motor body 91. Two air inlets 921 are provided on the outer side wall of the bearing seat 92 away from the motor body 91. One of the air inlets 921 communicates with the inside of the motor body 91, and the other air inlet 921 communicates with the oil chamber 10.

[0027] An embodiment of this application discloses an airtightness detection device. See Figures 3-4 , the airtightness detection device includes a water holding seat 1, a clamping seat 2 and a pressure measuring component 3. A water storage tank 11 is provided on the outer side wall of the water holding seat 1, and the opening of the water storage tank 11 faces upward.

[0028] See Figure 5 , the clamping seat 2 includes a base 21, a pressure rod 22 and a first driving member 23. A placement groove 211 is provided on the upper end surface of the base 21. The pressure rod 22 horizontally penetrates the base 21 and extends into the placement groove 211. The pressure rod 22 is slidably connected to the base 21, and the pressure rod 22 slides close to or away from the placement groove 211. The first driving member 23 is located outside the placement groove 211 and fixed to the base 21. The piston rod of the first driving member 23 is integrally fixed to the pressure rod 22. The first driving member 23 drives the pressure rod 22 to slide. In this embodiment, the first driving member 23 is a cylinder.

[0029] See Figures 1-6 , the pressure measuring component 3 includes a connecting pipe 31 and a pressure gauge 32. The connecting pipe 31 is used for threaded connection into the air inlet 921. A nozzle 4 is fixed on the connecting pipe 31. The pressure gauge 32 is fixed to one end of the connecting pipe 31. When inflating the nozzle 4, the pressure gauge 32 on the connecting pipe 31 connected to one of the air inlets 921 is used to detect the air pressure inside the motor body 91, and the pressure gauge 32 on the connecting pipe 31 connected to the other air inlet 921 is used to detect the air pressure inside the oil chamber 10.

[0030] See Figures 1-7 , a receiving cavity 12 is provided inside the water holding seat 1. A lifting plate 5 is slidably lifted inside the water holding seat 1. The lifting plate 5 includes a sliding part 51, two connecting parts 52 and a placement part 53. The sliding part 51 is located inside the receiving cavity 12 and is slidably lifted on the water holding seat 1. Two limiting rods 6 are fixed inside the water holding seat 1. Both of the two limiting rods 6 are located inside the receiving cavity 12 and are vertically arranged, and the two limiting rods 6 are spaced apart in the horizontal direction. Both of the two limiting rods 6 penetrate the sliding part 51.

[0031] SeeFigures 1-7 A driving component 7 is provided on the water holding base 1. The driving component 7 includes a lead screw 71 and a second driving member 72. The lead screw 71 is located in the accommodating cavity 12 and between the two limiting rods 6, and the lead screw 71 is rotatably connected to the water holding base 1. The rotation axis of the lead screw 71 is vertically arranged. The lead screw 71 penetrates through the sliding part 51 and is threadedly connected to the sliding part 51. The second driving member 72 is located below the lead screw 71 and fixed to the water holding base 1. The output shaft of the second driving member 72 is fixedly connected to the lead screw 71. The second driving member 72 drives the lead screw 71 to rotate. In this embodiment, the second driving member 72 is a motor. The second driving member 72 drives the lead screw 71 to rotate, and the lead screw 71 drives the sliding part 51 to move up and down through the threaded cooperation with the sliding part 51.

[0032] See Figures 1-7 Two connecting parts 52 are fixed to the side of the sliding part 51 close to the water storage tank 11 and are arranged at intervals in the horizontal direction. The placing part 53 is located on the side of the connecting part 52 away from the sliding part 51 and is fixedly connected to the two connecting parts 52. The placing part 53 is horizontally arranged, and the placing part 53 is used for placing the clamping seat 2. The water storage tank 11 is for the placing part 53 to be snapped into. A plurality of water draining holes 531 are formed in the outer side wall of the placing part 53, and the water draining holes 531 vertically penetrate through the placing part 53.

[0033] The implementation principle of the airtightness detection device in the embodiment of the present application is as follows: When airtightness detection is required, the motor body 91 and the bearing seat 92 are placed in the placing groove 211. The first driving member 23 drives the pressing rod 22 to move closer to the motor body 91 and the bearing seat 92 in the placing groove 211, so that the pressing rod 22 presses against the motor body 91 and the bearing seat 92, realizing locking between the motor body 91 and the bearing seat 92. Then, two connecting pipes 31 are respectively threadedly connected to the two air inlets 921, and air is filled into the air nozzle 4. Whether the air pressure inside the motor body 91 and the air pressure in the oil chamber 10 reach the requirements is observed through the pressure gauge 32. Then, the clamping seat 2 and the pressure measuring assembly 3 are placed on the placing part 53 together. The driving component 7 drives the sliding part 51 to move downwards, so that the motor body 91 and the bearing seat 92 are immersed in water. After standing for a period of time, it is observed whether there are bubbles on the water surface. The standing time can be determined according to actual needs. If there are bubbles generated, the airtightness does not meet the requirements. If there are no bubbles generated, the airtightness meets the requirements. It is convenient to fill air and the operation is simple, making it more convenient to detect the airtightness inside the motor body 91 and the oil chamber 10.

[0034] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An airtightness detection device, characterized in that: It includes a water holding base (1), a clamping base (2) and a pressure measuring component (3). A water storage tank (11) is provided on the water holding base (1). The clamping base (2) includes a base (21), a pressing rod (22) slidably connected to the base (21), and a first driving member (23) provided on the base (21). A placement groove (211) is provided on the base (21). The pressing rod (22) extends into the placement groove (211). The first driving member (23) drives the pressing rod (22) to slide closer to or away from the placement groove (211). The pressure measuring component (3) includes a connecting pipe (31) and a pressure gauge (32) provided on the connecting pipe (31). The connecting pipe (31) is used for threaded connection into the air inlet (921). A nozzle (4) is provided on the connecting pipe (31). When inflating the nozzle (4), the pressure gauge (32) on the connecting pipe (31) connected to one of the air inlets (921) is used to detect the air pressure inside the motor body (91), and the pressure gauge (32) on the connecting pipe (31) connected to the other air inlet (921) is used to detect the air pressure in the oil chamber (10).

2. The airtightness detection device according to claim 1, wherein: A lifting plate (5) is slidably lifted on the water holding base (1). The lifting plate (5) is used to place the clamping base (2). The water storage tank (11) allows the lifting plate (5) to be snapped into it. A driving assembly (7) for driving the lifting plate (5) to lift and lower is provided on the water holding base (1).

3. The airtightness detection device according to claim 2, wherein: The driving assembly (7) includes a lead screw (71) rotatably connected inside the water holding base (1) and a second driving member (72) provided on the water holding base (1). The lead screw (71) is threadedly connected to the lifting plate (5). The second driving member (72) drives the lead screw (71) to rotate.

4. The airtightness detection device according to claim 3, characterized in that: A limiting rod (6) is provided inside the water holding base (1). The limiting rod (6) is located on both sides of the lead screw (71) and passes through the lifting plate (5).

5. The airtightness detection device according to claim 2, characterized in that: A number of water drainage holes (531) are provided on the lifting plate (5).

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