CN209311017U - A kind of airtightness testing machine for middle layer spray arm - Google Patents

Abstract

The utility model discloses a middle level spray arm gas tightness test machine, including the testboard, locate electric cabinet and pressure sensor below the testboard, locate the test jig on the testboard, locate the first at test jig top, second gas, third cylinder, locate the support mould that is used for placing middle level spray arm of test jig bottom, be connected with respectively with the left side of middle level spray arm upper segment, have the first seal block and the second seal block of side profile adaptation on the cylinder post of first, second cylinder, be connected with the third seal block on the cylinder post of third cylinder, be equipped with on the third seal block with the first gas pocket of third cylinder and middle level spray arm internal cavity and with the second gas pocket of first gas pocket intercommunication, pressure sensor pass through the trachea with the second gas pocket intercommunication; compared with the prior art, the utility model discloses when middle level spray arm welding department gas leakage, can detect atmospheric pressure through trachea and middle level spray arm cavity intercommunication pressure sensor and change, and then make the gas leakage and judge, simple structure, test accuracy is high.

Description

A kind of airtightness testing machine for middle layer spray arm

technical field

The utility model relates to the field of air tightness testing, in particular to an air tightness testing machine for a middle layer spray arm.

Background technique

Some dishwashers usually have three spray arms for better washing effect. The lower spray arm is used to clean the tableware in the lower bowl basket, the middle spray arm and the upper spray arm are used to directly face the bottom and the upper bowl basket respectively. Spray water on the top to wash the tableware in the upper bowl; generally, the interface of the middle spray arm for connecting the water pipe of the spray arm and the spray holes on the spray arm are located on the upper piece of the spray arm of the middle spray arm. During the washing process, the water Enter the inner cavity of the middle spray arm through the spray arm water pipe interface of the middle spray arm, and then spray out from the spray hole, and the water sprays out through the spray hole to drive the spray arm to rotate and clean the tableware; in this process, if If the welding of the upper piece of the spray arm and the lower piece of the spray arm is unqualified, and the sealing is not strict, it will affect the pressure of the water spray, affect the rotation speed of the spray arm in the middle layer, and then affect the washing effect.

Utility model content

The purpose of the utility model is to solve the problems existing in the prior art, and to provide an air tightness testing machine for the middle spray arm.

In order to achieve the above object, the technical solution adopted in the utility model is a middle layer spray arm air tightness testing machine, the middle layer spray arm air tightness test machine includes a test bench, an electric control box and a pressure The sensor, the test stand on the test bench, the first cylinder, the second cylinder and the third cylinder on the top of the test stand, and the bottom of the test stand are used to place the middle spray arm and are adapted to the lower part of the middle spray arm The first cylinder column is connected with a first sealing block that is adapted to the shape of the left side of the middle layer spray arm, and the second cylinder column is connected with the shape of the right side of the middle layer spray arm. The second sealing block is equipped, the third sealing block is connected to the cylinder column of the third cylinder for sealing the water pipe interface of the spray arm, and the third sealing block is provided with the inner cavity of the third cylinder and the middle spray arm The first air hole and the second air hole communicated with the first air hole, the pressure sensor communicates with the second air hole through the air tube.

As an improvement of the present utility model, a bracket and a pool for holding water are provided on the test platform, and a lifting assembly for connecting with the test frame is provided on the bracket, the bracket spans the pool, and the bracket The crossbeam is located above the water pool, and the test frame can be immersed in the water pool under the action of the lifting assembly or leave the water pool under the action of the lifting assembly.

As an improvement of the present utility model, the lifting component is a lifting cylinder arranged on a support beam, and the test frame is connected with the lifting cylinder.

As an improvement of the present utility model, two guide rods are arranged on the top of the test frame, and the guide rods pass through the beam of the bracket and are symmetrically arranged on both sides of the lifting assembly.

As an improvement of the utility model, a pressure stabilizing valve is provided under the test platform, and the stabilizing valve communicates with the inner cavity of the middle spray arm.

As an improvement of the utility model, the third sealing block is provided with a third air hole communicating with the inner cavity of the middle spray arm, and the pressure stabilizing valve communicates with the third air hole through an air pipe.

As an improvement of the present utility model, the lower end of the third sealing block is provided with a plug, and the plug is adapted to the water distribution port on the upper piece of the middle spray arm and placed in the In the water distribution port.

Compared with the prior art, a middle spray arm air tightness testing machine of the utility model has the following advantages:

In the air tightness testing machine of the middle spray arm of the utility model, the first sealing block and the second sealing block respectively seal the spray holes on the left and right sides of the upper piece of the middle spray arm, and the third sealing block seals the upper piece of the middle spray arm with The interface connected to the water pipe of the spray arm is sealed; then the third cylinder is ventilated into the cavity of the middle spray arm. The air leakage judgment is made, the structure is simple, and the test accuracy is high.

Description of drawings

Fig. 1 is the structural representation of a kind of airtightness testing machine of the middle layer spray arm of the utility model

Fig. 2 is a structural schematic diagram of another direction of Fig. 1;

In the figure: 1. Test stand, 2. Test frame, 21. Guide rod, 22. The first cylinder, 221. The first sealing block, 23. The second cylinder, 231. The second sealing block, 24. The third cylinder, 241. The third sealing block, 3. Electric control box, 4. Pressure sensor, 5. Bracket, 6. Pool, 7. Lifting cylinder, 8. Regulator valve, 9. Middle spray arm

The realization and advantages of the functions of the utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

Below in conjunction with accompanying drawing and preferred embodiment the utility model is described further.

As shown in Fig. 1 and Fig. 2, a kind of middle layer spray arm air tightness test machine, middle layer spray arm air tightness test machine comprises test bench 1, is located at test bench 1 below electric control box 3 and pressure sensor 4, sets The test frame 2 on the test stand 1, the first cylinder 22, the second cylinder 23 and the third cylinder 24 that are located on the top of the test frame 2, the middle spray arm 9 that is located at the bottom of the test frame 2 and is connected with the middle spray The support mold for the lower part of the arm 9, the first cylinder 22 cylinder column is connected with the first sealing block 221 adapted to the shape of the left side of the upper part of the middle spray arm 9, the second cylinder 23 cylinder column is connected with the middle spray arm 9. The second sealing block 231 that is adapted to the shape on the right side of the upper piece, the third sealing block 241 that is used to seal the water pipe interface of the spray arm is connected to the third cylinder 24 cylinder column, and the third sealing block 241 is provided with the third sealing block 241. The first air hole communicated with the inner cavity of the middle layer spray arm 9 and the second air hole communicated with the first air hole, and the pressure sensor 4 communicates with the second air hole through the air pipe (the first air hole, the second air hole and the air pipe are not marked on the drawing) .

Preferably, the test bench 1 is provided with a support 5 and a pool 6 for holding water, and the support 5 is provided with a lifting assembly for connecting with the test frame 2, and the lifting assembly is a lifting cylinder 7 located on the support 5 beam, and the support 5 Across the pool, the crossbeam of the bracket 5 is located above the pool 6, and the 2 pieces of the test frame can be immersed in the pool 6 under the action of the lifting component or leave the pool 6 under the action of the lifting component; Immerse the test frame 2 in water so that the middle spray arm 9 is submerged in water. When air leakage occurs at the welding place between the upper piece and the lower piece of the middle spray arm 9, air bubbles will be generated on the water surface; Double detection, higher precision.

Preferably, the top of the test frame 2 is provided with two guide rods 21, and the guide rods 21 pass through the crossbeam of the support 5 and are symmetrically arranged on both sides of the lifting cylinder 7; when the lifting cylinder 7 drives the test frame 2 to rise or fall, The guide rod 21 can play a guiding role to make the operation stable.

Preferably, a pressure stabilizing valve 8 is provided below the test bench 1, and the stabilizing valve 8 communicates with the inner cavity of the middle spray arm 9; the third sealing block 241 is provided with a third air hole communicated with the inner cavity of the middle spray arm 9, The pressure stabilizing valve 8 communicates with the third air hole through the air pipe; when the first air hole of the third sealing block 241 is ventilated into the cavity of the middle spray arm 9, the pressure stabilizing valve 8 is started, and after the internal pressure of the middle spray arm 9 is stabilized, Stop the ventilation, close the pressure regulator valve 8, and then connect the pressure sensor 4 and the cavity of the middle spray arm 9, which can make the test results more accurate and avoid unstable air pressure, which will affect the judgment (the third air hole and air pipe are not marked in the figure).

Preferably, the lower end of the third sealing block 241 is provided with a plug, and the plug is adapted to the water distribution port on the upper sheet of the spray arm 9 in the middle layer and is placed in the water distribution port when the air tightness test is performed; when the third sealing block 241 is pressed to set When the middle layer spray arm 9 is loaded, the plug is placed in the water distribution port, which can be positioned and can make the seal tighter, and the water distribution port will leak air, which will affect the test results.

The working principle of the utility model is: when working, put the middle layer spray arm 9 into the supporting mold, then start the electric control box 3, and under the action of the control system, the first sealing block 221 and the second sealing block 231 spray the middle layer respectively. The nozzle holes on the left and right sides of the upper piece of the arm 9 are sealed, and the third sealing block 241 seals the interface connecting the upper piece of the spray arm 9 of the middle layer to the water pipe of the spray arm and makes the plug enter into the water pipe interface of the spray arm; Ventilation in the cavity of the spray arm 9, when the pressure stabilizing valve 8 tests the air pressure in the middle spray arm 9 is stable, stop the ventilation, connect the second air hole and the pressure sensor 4, and at the same time, the lifting cylinder 7 will immerse the test frame 2 in water, when the pressure sensor 4. When it is detected that the air pressure in the chamber of the middle spray arm 9 decreases/bubbles are generated in the pool 6, or when the air pressure in the cavity of the middle spray arm 9 decreases and bubbles are generated in the pool 6, it proves that the welding of the middle spray arm 9 leaks.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modification, equivalent replacement or improvement made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. a middle layer spray arm air tightness testing machine, it is characterized in that: described middle layer spray arm air tightness test machine comprises test bench, is located at the electric control box and the pressure transducer below the test bench, is located at the test bench The test frame, the first cylinder, the second cylinder and the third cylinder located on the top of the test frame, the support mold for placing the middle spray arm and matching with the lower part of the middle spray arm, the first The cylinder column of the cylinder is connected with a first sealing block that is adapted to the shape of the left side of the middle layer spray arm, and the second cylinder column is connected with a second sealing block that is adapted to the shape of the right side of the middle layer spray arm. The cylinder column of the third cylinder is connected with a third sealing block for sealing the water pipe interface of the spray arm. The second air hole communicated with the air hole, and the pressure sensor communicates with the second air hole through the air tube. 2. According to claim 1, said middle layer spray arm air tightness testing machine is characterized in that: said test stand is provided with a support and a pool for holding water, and said support is provided with a lift for connecting with the test stand. Assemblies, the bracket spans the water pool, the beam of the bracket is located above the water pool, and the test frame can be immersed in the water pool under the action of the lifting assembly or leave the water pool under the action of the lifting assembly . 3. The airtightness testing machine for the middle layer spray arm according to claim 2, wherein the lifting component is a lifting cylinder arranged on a support beam, and the test frame is connected with the lifting cylinder. 4. according to the said middle layer spray arm airtightness testing machine of claim 3, it is characterized in that: the top of said test frame is provided with two guide rods, and said guide rods pass through the crossbeam of said support and are symmetrically located at said Both sides of the lift assembly mentioned above. 5. The air tightness testing machine for the middle spray arm according to claim 2, characterized in that: a pressure stabilizing valve is provided under the test platform, and the pressure stabilizing valve communicates with the inner cavity of the middle spray arm. 6. According to claim 5, the middle layer spray arm air tightness testing machine is characterized in that: the third sealing block is provided with a third air hole communicating with the inner cavity of the middle layer spray arm, and the pressure stabilizing valve passes through the air pipe communicate with the third air hole. 7. According to claim 1, the air tightness testing machine of the middle layer spray arm is characterized in that: the lower end of the third sealing block is provided with a plug, and the plug is adapted to the water distribution port on the upper piece of the middle layer spray arm And place it in the water distribution port when performing the air tightness test.