Positive and negative pressure testing device for steam air valve

Abstract

The utility model provides a steam air valve positive and negative pressure test device, the pressure test device comprises a positive pressure cavity, a negative pressure cavity and a sealing cover, the positive pressure cavity is used as an inflation cavity during a positive pressure test, and comprises a positive pressure cavity body, a positive pressure cavity three-way joint, a positive pressure cavity pressure gauge, a positive pressure cavity air inlet switch, a positive pressure cavity air outlet switch, a positive pressure cavity hose and a positive pressure cavity water tank; the negative pressure cavity serves as an inflation cavity in a negative pressure test and comprises a negative pressure cavity body, a negative pressure cavity three-way connector, a negative pressure cavity pressure gauge, a negative pressure cavity air inlet switch, a negative pressure cavity air outlet switch, a negative pressure cavity hose and a negative pressure cavity water tank. According to the utility model, positive and negative pressure tests of the steam air valve can be completed in the same set of device, only one inflating device is needed for pressure test, vacuumizing equipment is not needed, the steam air valve does not need to be contacted with water in the pressure test process, a locking hoop mode is adopted for installation of the sealing cover, and compared with a traditional test mode, the device is more sensitive in test effect, more convenient in test operation and higher in test efficiency. The pressure test cost is effectively reduced, and the pressure test efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment testing, and particularly relates to a positive and negative pressure testing device for a steam air valve. Background Art

[0002] The steam air valve is a specially designed two-way valve used in the engine cooling system of special vehicles to connect the radiator water tank. The steam air valve is used to adjust the pressure in the radiator water tank, prevent the water tank from deforming or bursting due to excessive pressure in the water tank, ensure real-time dynamic balance between the pressure in the water tank and the external air pressure, and at the same time ensure smooth fluid transmission in the pipeline, ensuring the normal operation of the cooling system during the driving of special vehicles.

[0003] Whether the steam air valve can open the corresponding positive and negative pressure valves within the required positive and negative pressure ranges determines the safety and efficiency of fluid transmission in the cooling system. Therefore, each steam air valve must undergo strict positive and negative pressure tests before being installed on the vehicle. The required positive and negative pressure opening pressure ranges of the steam air valve are 0.20 - 0.22 MPa and -0.0081 - -0.013 MPa respectively. The traditional pressure testing method is as follows: The pressure testing personnel use two sets of devices to test the positive pressure and negative pressure respectively. When testing the positive pressure, the device is connected to the inflation equipment, and the steam air valve is immersed in water. When a large number of bubbles are generated in the water, it is judged that the positive valve of the steam air valve opens. When testing the negative pressure, the device is connected to the vacuum pumping equipment, and the steam air valve is also immersed in water. When it is observed that water seeps into the device through the air valve, it is judged that the reverse valve of the steam air valve opens. This pressure testing method requires two sets of pressure testing devices. Therefore, each steam air valve needs to be loaded and unloaded twice during pressure testing, and inflation equipment and vacuum pumping equipment are required at the same time, and all steam air valves need to contact water, which is prone to rust. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] The utility model provides a positive and negative pressure testing device for a steam air valve to solve the technical problems of frequent loading and unloading, cumbersome operation method, low pressure testing efficiency, and easy rusting existing in the traditional pressure testing method of the steam air valve.

[0006] (2) Technical Solutions

[0007] To solve the above technical problems, the utility model provides a positive and negative pressure testing device for a steam air valve, which includes a positive pressure chamber, a negative pressure chamber, and a sealing cover; wherein,

[0008] The positive pressure chamber serves as the inflation chamber during positive pressure tests and includes a positive pressure chamber body, a positive pressure chamber three-way joint, a positive pressure chamber pressure gauge, a positive pressure chamber air inlet switch, a positive pressure chamber air outlet switch, a positive pressure chamber hose, and a positive pressure chamber water tank; the negative pressure chamber serves as the inflation chamber during negative pressure tests and includes a negative pressure chamber body, a negative pressure chamber three-way joint, a negative pressure chamber pressure gauge, a negative pressure chamber air inlet switch, a negative pressure chamber air outlet switch, a negative pressure chamber hose, and a negative pressure chamber water tank;

[0009] The negative pressure chamber body is fixedly connected to the positive pressure chamber body. The bottom of the negative pressure chamber body is pressed tightly against the upper opening of the positive pressure chamber body, and a sealing cover is installed at the upper opening of the negative pressure chamber body;

[0010] On the side wall of the positive pressure chamber body, a positive pressure chamber three-way joint communicating with the chamber is installed. A positive pressure chamber air inlet switch and a positive pressure chamber air outlet switch are respectively installed at the air inlet and air outlet of the positive pressure chamber three-way joint 1. A positive pressure chamber pressure gauge is arranged outside the positive pressure chamber air inlet switch, and a positive pressure chamber hose is connected outside the positive pressure chamber air outlet switch. The positive pressure chamber hose communicates with the positive pressure chamber water tank; on the side wall of the negative pressure chamber body, a negative pressure chamber three-way joint communicating with the chamber is installed. A negative pressure chamber air inlet switch and a negative pressure chamber air outlet switch are respectively installed at the air inlet and air outlet of the negative pressure chamber three-way joint. A negative pressure chamber pressure gauge is arranged outside the negative pressure chamber air inlet switch, and a negative pressure chamber hose is connected outside the negative pressure chamber air outlet switch. The negative pressure chamber hose communicates with the negative pressure chamber water tank.

[0011] Furthermore, the negative pressure chamber body is fixedly connected to the positive pressure chamber body through a flange.

[0012] Furthermore, a sealing ring is arranged at the contact position between the negative pressure chamber body and the positive pressure chamber body.

[0013] Furthermore, a sealing gasket is provided at the contact position between the sealing cover and the negative pressure chamber body.

[0014] Furthermore, the outer periphery of the sealing cover and the negative pressure chamber body are fixedly connected through a locking hoop.

[0015] (III) Beneficial effects

[0016] The present utility model proposes a positive and negative pressure pressure testing device for a steam air valve. The pressure testing device includes a positive pressure chamber, a negative pressure chamber, and a sealing cover. The positive pressure chamber serves as the inflation chamber during positive pressure testing and includes a positive pressure cavity body, a positive pressure chamber three-way joint, a positive pressure chamber pressure gauge, a positive pressure chamber air inlet switch, a positive pressure chamber air outlet switch, a positive pressure chamber hose, and a positive pressure chamber water tank. The negative pressure chamber serves as the inflation chamber during negative pressure testing and includes a negative pressure cavity body, a negative pressure chamber three-way joint, a negative pressure chamber pressure gauge, a negative pressure chamber air inlet switch, a negative pressure chamber air outlet switch, a negative pressure chamber hose, and a negative pressure chamber water tank. The present utility model enables the steam air valve to complete positive and negative pressure tests in the same set of device. Only one inflation device is required for pressure testing without a vacuum pumping device. During the pressure testing process, the steam air valve does not need to be in contact with water. The sealing cover is installed by means of a locking hoop, which is quick to disassemble and assemble. The results of positive and negative pressure tests are both feedback by the bubble phenomenon. Compared with the traditional testing method, the testing effect of the present utility model is more sensitive, the testing operation is more convenient, the pressure testing cost is effectively reduced, the pressure testing efficiency is improved, and at the same time, the problems of rusting of the steam air valve and the pressure testing device are avoided, ensuring the product quality. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the composition principle of the positive and negative pressure pressure testing device for the steam air valve of the present utility model. Detailed Description of the Embodiment

[0018] To make the purpose, content, and advantages of the present utility model clearer, the following further describes the detailed implementation manners of the present utility model in conjunction with the drawings and embodiments.

[0019] This embodiment proposes a positive and negative pressure pressure testing device for a steam air valve, and its composition is as Figure 1 shown, mainly including a positive pressure chamber 1, a negative pressure chamber 2, a sealing cover 3, and a locking hoop 4.

[0020] The positive pressure chamber 1 serves as the inflation chamber during positive pressure testing and includes a positive pressure cavity body, a positive pressure chamber three-way joint 1-1, a positive pressure chamber pressure gauge 1-2, a positive pressure chamber air inlet switch 1-3, a positive pressure chamber air outlet switch 1-4, a positive pressure chamber hose 1-5, and a positive pressure chamber water tank 1-6. The negative pressure chamber 2 serves as the inflation chamber during negative pressure testing and includes a negative pressure cavity body, a negative pressure chamber three-way joint 2-1, a negative pressure chamber pressure gauge 2-2, a negative pressure chamber air inlet switch 2-3, a negative pressure chamber air outlet switch 2-4, a negative pressure chamber hose 2-5, and a negative pressure chamber water tank 2-6. The negative pressure cavity body is fixedly connected to the positive pressure cavity body through a flange. The bottom of the cavity of the negative pressure cavity body is pressed against the upper opening of the positive pressure cavity body. A sealing ring 1-7 is arranged at the contact position between the negative pressure cavity body and the positive pressure cavity body to ensure the sealing performance of the device. The sealing cover 3 is installed at the upper opening of the negative pressure cavity body. A sealing gasket 3-1 is arranged at the contact position between the sealing cover 3 and the negative pressure cavity body. The outer periphery of the sealing cover 3 and the negative pressure cavity body are fixedly connected through a locking hoop 4 to ensure the sealing performance of the device and at the same time enable quick disassembly and assembly.

[0021] On the side wall of the positive pressure cavity, a positive pressure cavity three-way joint 1-1 communicating with the cavity is installed. A positive pressure cavity air inlet switch 1-3 and a positive pressure cavity air outlet switch 1-4 are respectively installed at the air inlet and air outlet of the positive pressure cavity three-way joint 1-1. A positive pressure cavity pressure gauge 1-2 is arranged outside the positive pressure cavity air inlet switch 1-3. A positive pressure cavity hose 1-5 is connected outside the positive pressure cavity air outlet switch 1-4, and the positive pressure cavity hose 1-5 communicates with a positive pressure cavity water tank 1-6; on the side wall of the negative pressure cavity, a negative pressure cavity three-way joint 2-1 communicating with the cavity is installed. A negative pressure cavity air inlet switch 2-3 and a negative pressure cavity air outlet switch 2-4 are respectively installed at the air inlet and air outlet of the negative pressure cavity three-way joint 2-1. A negative pressure cavity pressure gauge 2-2 is arranged outside the negative pressure cavity air inlet switch 2-3. A negative pressure cavity hose 2-5 is connected outside the negative pressure cavity air outlet switch 2-4, and the negative pressure cavity hose 2-5 communicates with a negative pressure cavity water tank 2-6.

[0022] Using the above positive and negative pressure testing device for steam air valves, the method for performing positive and negative pressure testing of steam air valves mainly includes the following steps:

[0023] 1. Test positive pressure

[0024] The steam air valve 5 is installed between the positive pressure cavity and the negative pressure cavity through threaded connection, separating the positive pressure cavity and the negative pressure cavity. The sealing cover 3 and the sealing gasket 3-1 are fixedly connected to the negative pressure cavity through the locking hoop 4; the air inlet of the positive pressure cavity three-way joint 1-1 is connected to an external inflation device; the positive pressure cavity air outlet switch 1-4 and the negative pressure cavity air inlet switch 2-3 are closed, and the positive pressure cavity air inlet switch 1-3 and the negative pressure cavity air outlet switch 2-4 are opened; start inflating. When the positive pressure cavity pressure gauge 1-2 shows that the air pressure reaches the range of 0.20 - 0.22 MPa, observe whether there are a large number of bubbles generated in the negative pressure cavity water tank 2-6. If there are bubbles generated, it indicates that the forward valve of the steam air valve 5 is opened and the pressure test is qualified.

[0025] 2. Test negative pressure

[0026] The air inlet of the negative pressure cavity three-way joint 2-1 is connected to the air duct of an external inflation device; the negative pressure cavity air outlet switch 2-4 and the positive pressure cavity air inlet switch 1-3 are closed, and the negative pressure cavity air inlet switch 2-3 and the positive pressure cavity air outlet switch 1-4 are opened; start inflating. When the negative pressure cavity pressure gauge 2-2 shows that the air pressure reaches the range of 0.0081 - 0.013 MPa, observe whether there are a large number of bubbles generated in the positive pressure cavity water tank 1-6. If there are bubbles generated, it indicates that the reverse valve of the steam air valve 5 is opened and the pressure test is qualified.

[0027] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A steam air valve positive and negative pressure test device, characterized in that: The steam air valve positive and negative pressure test device comprises a positive pressure chamber, a negative pressure chamber and a sealing cover; wherein, The positive pressure chamber is used as the inflatable chamber during the positive pressure test, including the positive pressure chamber, the positive pressure chamber three-way joint, the positive pressure chamber pressure gauge, the positive pressure chamber air inlet switch, the positive pressure chamber air outlet switch, the positive pressure chamber hose and the positive pressure chamber water tank; the negative pressure chamber is used as the inflatable chamber during the negative pressure test, including the negative pressure chamber, the negative pressure chamber three-way joint, the negative pressure chamber pressure gauge, the negative pressure chamber air inlet switch, the negative pressure chamber air outlet switch, the negative pressure chamber hose and the negative pressure chamber water tank; The negative pressure cavity is fixedly connected to the positive pressure cavity, the cavity bottom of the negative pressure cavity is pressed tightly against the upper opening of the positive pressure cavity, and the sealing cover is installed at the upper opening of the negative pressure cavity; A positive-pressure chamber three-way joint connected to the cavity is installed on the side wall of the positive-pressure chamber body, and a positive-pressure chamber air inlet switch and a positive-pressure chamber air outlet switch are respectively installed at the air inlet and air outlet of the positive-pressure chamber three-way joint, a positive-pressure chamber pressure gauge is arranged on the outside of the positive-pressure chamber air inlet switch, a positive-pressure chamber hose is connected to the outside of the positive-pressure chamber air outlet switch, and the positive-pressure chamber hose is connected to the positive-pressure chamber water sink; a negative-pressure chamber three-way joint connected to the cavity is installed on the side wall of the negative-pressure chamber body, and a negative-pressure chamber air inlet switch and a negative-pressure chamber air outlet switch are respectively installed at the air inlet and air outlet of the negative-pressure chamber three-way joint, a negative-pressure chamber pressure gauge is arranged on the outside of the negative-pressure chamber air inlet switch, a negative-pressure chamber hose is connected to the outside of the negative-pressure chamber air outlet switch, and the negative-pressure chamber hose is connected to the negative-pressure chamber water sink.

2. The steam air valve positive and negative pressure testing device according to claim 1, characterized in that: The negative pressure cavity is fixedly connected to the positive pressure cavity through a flange.

3. The steam air valve positive and negative pressure testing device according to claim 1, characterized in that: A sealing ring is arranged at the contact position between the negative pressure cavity and the positive pressure cavity.

4. The steam air valve positive and negative pressure testing device according to claim 1, characterized in that: A sealing gasket is provided at the contact position between the sealing cover and the negative pressure cavity.

5. The steam air valve positive and negative pressure testing device according to claim 1, characterized in that: The sealing cover is fixedly connected to the outer periphery of the negative pressure cavity through a locking clamp.

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