CN205300873U - Combined type airtight inspection machine futilely wets - Google Patents

Abstract

The utility model discloses a dry-wet compound type airtight inspection machine. A water container is arranged in the middle of the water tank, and the water container communicates with the lower cavity of the water tank through a through hole at the bottom; a sealing panel is arranged in the water container, The top of the compression device is connected to the piston rod of the cylinder; the air pressure detection device includes an air source, an air pipe, a three-way valve and two branch pipes, one end of the air pipe is connected to the air source, and the other end of the air pipe is connected to the inlet of the three-way valve. The first outlet of the through valve is connected to the first branch pipe, which can communicate with the inner cavity of the workpiece, and the second outlet of the three-way valve is connected to the second branch pipe, which communicates with the lower cavity of the water tank. The utility model has the advantages of simple structure, easy assembly and low cost; through the dry-wet combination method, it can accurately detect whether the gearbox case leaks air and where the air leaks. It is not only easy to operate, but also has high detection efficiency. It is suitable for boxes and other products with cavities, and the application range is very wide.

Description

Dry and wet compound air tightness inspection machine

technical field

The utility model relates to a dry-wet composite type airtight inspection machine, which is used for inspecting the airtightness of a gearbox case.

Background technique

At present, whether the gearbox case leaks is detected by a specially made air-tight machine. Existing airtight machines are divided into two types: water inspection and dry inspection. The water inspection airtight machine needs manual observation for each workpiece, which is not only cumbersome, but also has poor accuracy and low detection efficiency; the dry inspection airtight machine can only It is detected whether there is an air leak in the gearbox case, but the location of the air leak cannot be accurately grasped.

Utility model content

The technical problem to be solved by the utility model is to provide a dry-wet composite airtight inspection machine with good accuracy and high working efficiency.

The technical scheme of the utility model is as follows: a dry-wet compound type airtight inspection machine, including a water tank, is characterized in that: a water container is arranged in the middle of the water tank, and the water container is connected to the lower part of the water tank through the through hole at the bottom. The cavity is connected; a sealing panel for supporting the workpiece is arranged in the water container, and the pressing device for pressing the workpiece is located above the sealing panel. The top of the pressing device is connected with the piston rod of the cylinder, and the cylinder is installed on the On the top of the water tank, the piston rod of the cylinder protrudes vertically downward; an electric control cabinet is set beside the water tank, and an indicator light is arranged on the electric control cabinet; the air pressure detection device includes an air source, an air pipe, a three-way valve and two branch pipes. One end of the air pipe is connected to the air source, the other end of the air pipe is connected to the inlet of the three-way valve, the first outlet of the three-way valve is connected to the first branch pipe, the first branch pipe can communicate with the inner cavity of the workpiece, and the third branch pipe of the three-way valve The second outlet is connected with the second branch pipe, and the second branch pipe communicates with the lower cavity of the water tank.

Using the above technical scheme, first place the workpiece of the transmission case to be tested on the sealing panel, make the open end of the workpiece face down and be supported by the sealing panel, and then control the movement of the cylinder so that the piston rod of the cylinder protrudes downward, and the cylinder The piston rod drives the compression device to move downward until the compression device is pressed on the workpiece, so that the open end of the workpiece is tightly connected with the sealing panel, and then 0.2MPa is filled into the inner cavity of the workpiece through the air source and the first branch pipe If the pressure value of the compressed air does not exceed the specified change value within the specified time, the workpiece does not leak air, the indicator light is green, and the workpiece is qualified; if the pressure value of the compressed air exceeds the specified change value within the specified time , the workpiece leaks air, the indicator light shows a red light, and the workpiece is unqualified. When the workpiece is unqualified, pass the compressed air into the water tank through the air source and the second branch pipe, press the water in the water tank into the water container, and submerge the workpiece, then fill the inner cavity of the workpiece with compressed air, and observe the surface of the workpiece , to see where the bubbles appear, you can detect where the workpiece is leaking.

Preferably, the water tank is a square box structure.

Beneficial effects: the utility model has the advantages of simple structure, easy assembly, and low cost; through the combination of dry and wet, it can accurately detect whether the gearbox box is leaking and where the air is leaking. It is not only easy to operate, but also has high detection efficiency. It is suitable for all types of gearbox cases and other products with cavities, and the application range is very wide.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the gas circuit diagram of the utility model.

detailed description

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

As shown in Fig. 1 and Fig. 2, the water tank 1 is preferably a square box structure, and the upper part of the water tank 1 is provided with an opening so that the gearbox case workpiece 12 can be put in or taken out. Install cylinder 5 in the center of water tank 1 top cover, the piston rod of cylinder 5 stretches out vertically downwards, and the piston rod of cylinder 5 stretches in the water tank 1. A water container 2 is fixedly installed in the middle of the water tank 1. The bottom of the water container 2 is provided with a through hole. The size and number of the through holes are determined according to actual needs. The water container 2 communicates with the lower cavity of the water tank 1 through the through hole at the bottom. . A sealing panel 3 for supporting the workpiece is arranged in the water container 2 , and a pressing device 4 for pressing the workpiece is located above the sealing panel 3 , and the top of the pressing device 4 is connected with the piston rod of the air cylinder 5 .

As shown in Figures 1 and 2, the air pressure detection device includes an air source 7, an air pipe 8, a three-way valve 9 and two branch pipes. One end of the air pipe 8 is connected to the air source 7, and the other end of the air pipe 8 is connected to the end of the three-way valve 9. The inlet is connected, the first outlet of the three-way valve 9 is connected with the first branch pipe 10, the first branch pipe 10 can communicate with the inner cavity of the workpiece, the second outlet of the three-way valve 9 is connected with the second branch pipe 11, and the second branch pipe 11 is connected with the inner cavity of the workpiece. The lower cavity of the water tank 1 communicates. Electric control cabinet 6 is set beside water tank 1, and electric control cabinet 6 is provided with indicator light, and electric control cabinet 6 is equipped with PLC circuit, and cylinder and all electrical components are controlled by PLC circuit.

The working principle of the utility model is as follows:

First place the gearbox case workpiece 12 to be detected on the sealing panel 3, make the open end of the workpiece 12 face down and be supported by the sealing panel 3, the first branch pipe 10 communicates with the inner cavity of the workpiece 12, and then start the electric control cabinet The electrical switch of 6 controls the action of the cylinder 5, so that the piston rod of the cylinder 5 extends downward, and the piston rod of the cylinder 5 drives the compression device 4 to move downward until the compression device 4 is pressed on the workpiece 12, so that the workpiece 12 The open end is closely connected with the sealing panel 3, and then the inner cavity of the workpiece 12 is filled with 0.2MPa compressed air through the air source 7, the air pipe 8 and the first branch pipe 10. If the value exceeds the specified change value, the workpiece does not leak air, the indicator light shows green light, and the workpiece is qualified; if the pressure value of the compressed air exceeds the specified change value within the specified time, the workpiece leaks air, the indicator light shows red light, and the workpiece is unqualified. When the workpiece is unqualified, pass the compressed air into the water tank 1 through the air source 7, the air pipe 8 and the second branch pipe 11, press the water in the water tank 1 into the water container 2, and submerge the workpiece 12, and then fill the workpiece with compressed air In the inner chamber of 12, observe the surface of workpiece 12, see where to take out air bubble, can detect where the workpiece is leaking.

The air pressure gauges, valves and other components in the gas circuit of the utility model are conventionally arranged according to the needs, and will not be described in detail here.

Claims (2)

1. the airtight inspection machine of dry and wet combined type, including water tank (1), it is characterized in that: the middle part in described water tank (1) arranges water container (2), and this water container (2) is connected by the lower cavity of the through hole bottom it with water tank (1); In water container (2), it is arranged to support the sealing panel (3) of workpiece, the top of sealing panel (3) it is positioned at for the hold down gag (4) of workpiece pressing, the top of this hold down gag (4) is connected with the piston rod of cylinder (5), described cylinder (5) is installed on the top of water tank (1), and the piston rod of cylinder (5) stretches out straight down; Arrange electrical control cubicles (6) on the side of water tank (1), electrical control cubicles (6) is provided with display lamp; Pressure test device includes source of the gas (7), trachea (8), three-way valve (9) and two are in charge of, one of described trachea (8) is connected with source of the gas (7), the other end of trachea (8) is connected with the import of three-way valve (9), first outlet of three-way valve (9) is in charge of (10) with first and is connected, first is in charge of (10) can with the inner space of workpiece, second outlet of three-way valve (9) is in charge of (11) with second and is connected, and second is in charge of (11) connects with the lower cavity of water tank (1).

2. the airtight inspection machine of dry and wet combined type according to claim 1, it is characterised in that: described water tank (1) is square box structure.