Differential pressure type automobile cooling system leak detection equipment

Abstract

The utility model provides a differential pressure type automobile cooling system leak detection device, which relates to the technical field of automobile cooling system cooling liquid filling and comprises a cabinet, an electric control assembly, a system configuration control valve assembly, a liquid storage tank, a vacuum separation tank, a back suction separation tank, a detection assembly and a vacuum filling gun. A control unit, a control cabinet air conditioner and a filling gun swing arm are arranged in the machine cabinet, and an air source processing unit and a pneumatic control valve set are arranged in the control valve assembly. By arranging a vacuum pump, a filling pump, a vacuum separation tank, a back suction separation tank, a vacuum sensor, an air source processing element and a flow sensor, automatic processes of leak detection and vacuum filling are performed on new workpieces on a production line, and meanwhile, a pre-inflation function is added in an equipment system; before leakage detection, a workpiece is filled with pressure slightly lower than a set value in advance, and leakage detection of the workpiece is completed through the procedures of pressurizing, pressure stabilizing, leakage detection and the like of the precise leakage detector after pressure stabilizing.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile cooling system coolant filling, in particular to a pressure difference type automobile cooling system leakage detection device. Background Art

[0002] Due to the rising energy costs and increasingly serious environmental pollution problems, pure electric vehicles and hybrid vehicles have been highly valued by the government and various automobile companies because of their advantages of being able to significantly eliminate or even zero-emission automobile exhaust. Battery modules, as important energy storage components on electric vehicles, are important components of electric vehicles and directly affect the performance of electric vehicles. Battery modules will generate a large amount of heat energy during operation, and the battery modules need to be cooled down in time. In the existing technology, liquid cooling is often used to cool down the battery modules. Before the car leaves the factory, the cooling system needs to be filled with coolant. During the process of adding coolant, the car cooling system needs to be leak-checked. After confirming that the sealing is qualified, it can be filled. During the leak detection process, leakage below 2mbar is often detected, and the existing leak detection technology is difficult to meet the requirements. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problems raised in the above background technology.

[0004] The utility model adopts the following technical scheme: a pressure differential automobile cooling system leak detection device, including a cabinet, an electronic control component, a system configuration control valve component, a liquid storage tank, a vacuum separation tank, a back-suction separation tank, a detection component and a vacuum filling gun, wherein a control unit, a control cabinet air conditioner and a filling gun swing arm are arranged inside the cabinet, an air source processing unit and a pneumatic control valve group are arranged in the control valve component, and a gun vacuum detection valve, a charging valve, a vacuum gauge valve, a pre-charging valve, a vacuum gauge and a precision airtight leak detector are arranged in the detection component.

[0005] Preferably, the compressed air is respectively connected to the rehydration pump valve, the gun clamping and releasing valve, the air blowing pressure regulating valve, the fast and slow pressure regulating valve, the pressure control valve, the pre-filling pressure regulating valve, the pressure regulating valve and the leak detector. Here, the pneumatic control valve group is a valve island module, and the processed air source is connected to the valve in the system through the valve island, and the opening and closing of the valve is controlled by the control unit.

[0006] Preferably, the liquid storage tank is connected to the liquid replenishment barrel through a liquid replenishment pump to form a liquid replenishment and liquid storage pipeline, the double liquid replenishment barrel, the liquid replenishment pipeline is provided with a filter and a flow switch, and the liquid storage tank is provided with a liquid level sensor. Here, while filtering the coolant, a continuous supply of filling is guaranteed.

[0007] Preferably, the liquid storage tank is connected to the filling valve via a filling pump, and the filling valve is connected to the gun filling valve to form a filling pipeline for the filling gun. An overflow valve, a one-way valve, a filter, a flow meter, a pressure sensor, and a pressure gauge are provided between the filling pump and the filling valve, and the overflow valve is connected to the liquid storage tank. Here, the overflow valve is a pneumatically controlled adjustment method, and the overflow valve pressure is controlled by switching the pressure switching valve to adjust the filling pressure. The PLC accurately controls the filling requirements by collecting the flow meter and pressure sensor signals.

[0008] Preferably, the vacuum separation tank is provided with a vacuum tank blow valve, the vacuum tank blow valve is connected to an air source, the vacuum separation tank is connected to a vacuum pump through the vacuum valve, and the vacuum separation tank is connected to a gun vacuum valve through a pressure-maintaining valve to form a vacuum inlet pipeline for a filling gun. Here, in order to prevent the extracted air containing moisture from directly flowing into the vacuum pump, when the moisture at the bottom of the vacuum tank accumulates to a certain extent, the vacuum valve and the pressure-maintaining valve are closed, the vacuum tank blow valve is opened, the air source fills the vacuum separation tank with high-pressure air, the vacuum tank drain valve is opened, and the accumulated liquid flows into the liquid storage tank.

[0009] Preferably, the back-suction separation tank is connected to the liquid storage tank via the back-suction tank drain valve, the back-suction separation tank is connected to the gun back-suction valve via the back-suction valve to form the back-suction pipeline of the filling gun, the back-suction separation tank is connected to the air source via the back-suction tank blow valve, and the air source is connected to the back-suction separation tank via the vacuum generator valve and the vacuum generator in turn. Here, the back-suction separation tank and the vacuum separation tank have the same function, which ensures the service life of the vacuum generator and realizes the recovery of the coolant in the back-suction gas.

[0010] Preferably, the vacuum detection valve is connected to the gun vacuum valve to form a detection pipeline of the filling gun, the precision airtight leak detector is connected to the detection component through the pre-filling valve, the workpiece connected to the detection filling gun, and the compressed air after the air source processing unit is connected to the upstream of the gun vacuum valve through the blowing valve. Here, by opening the gun vacuum valve and closing the pressure-maintaining valve, the pipeline in the filling gun can be purged, and the structure is ingenious.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] In the utility model, by arranging a vacuum pump, a filling pump, a vacuum separation tank, a back-suction separation tank, a vacuum sensor, an air source processing element and a flow sensor, an automatic process of leak detection and vacuum filling of new workpieces on the production line is achieved, and a pre-charging function is also added to the equipment system. Before leak detection, the workpiece is filled with a pressure slightly lower than the set value in advance, and after the pressure is stabilized, the precise airtight leak detector is used to complete the leak detection of the workpiece through the processes of pressure charging, voltage stabilization and leak detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model provides a three-dimensional structural schematic diagram of a pressure differential type automobile cooling system leak detection device;

[0014] Figure 2 The utility model provides a schematic diagram of the internal structure of a pressure differential type automobile cooling system leak detection device;

[0015] Figure 3 The utility model provides a schematic diagram of the internal structure of a pressure differential type automobile cooling system leak detection device;

[0016] Figure 4 The utility model provides a schematic diagram of the internal structure of a pressure difference type automobile cooling system leak detection device.

[0017] Legend:

[0018] 1. Cabinet; 2. Control cabinet air conditioner; 3. Filling gun swing arm; 4. Vacuum pump; 5. Filling pump; 6. Vacuum separation tank; 7. Back-suction separation tank; 8. Vacuum sensor; 9. Air source processing element; 10. Air hole overflow valve; 11. Fine filter; 12. Liquid storage tank; 13. Flow sensor; 14. Airtight leak detector; 15. Liquid replenishment pump; 16. Vacuum filling gun; 17. Pressure gauge. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0021] Example

[0022] See also Figure 1-4The utility model provides a technical solution: a pressure differential automobile cooling system leak detection device, including a cabinet 1, an electronic control component, a system configuration control valve component, a liquid storage tank 12, a vacuum separation tank 6, a back-suction separation tank 7, a detection component and a vacuum filling gun 16, a control unit, a control cabinet air conditioner 2 and a filling gun swing arm 3 are arranged inside the cabinet 1, an air source processing unit and a pneumatic control valve group are arranged in the control valve component, a gun vacuum detection valve, a charging valve, a vacuum gauge valve, a pre-charging valve, a vacuum gauge and a precision airtight leak detector 14 are arranged in the detection component, and compressed air is respectively connected to a liquid replenishment pump 15 valve, a gun clamping and releasing valve, an air blowing pressure regulating valve, a fast and slow pressure regulating valve, a pressure control valve, a pre-charging pressure regulating valve, a pressure regulating valve and a leak detector, and the pneumatic control valve group is a valve island module, and the processed air source passes through the valve island The valves in the connecting system are controlled by the control unit to open and close. The liquid storage tank 12 is connected to the liquid replenishment barrel through the liquid replenishment pump 15 to form a liquid replenishment storage pipeline. There are double liquid replenishment barrels, and filters and flow switches are set in the liquid replenishment pipeline. The liquid storage tank 12 is equipped with a liquid level sensor to filter the coolant while ensuring the continuous supply of filling. The liquid storage tank 12 is connected to the filling valve through the filling pump 5, and the filling valve is connected to the gun filling valve to form a filling pipeline of the filling gun. An overflow valve, a one-way valve, a filter, a flow meter, a pressure sensor, and a pressure gauge 17 are set between the filling pump 5 and the filling valve. The overflow valve is connected to the liquid storage tank 12. The overflow valve is an air-controlled adjustment method. The overflow valve pressure is controlled by switching the pressure switching valve to adjust the filling pressure. The PLC accurately controls the filling requirements by collecting the flow meter and pressure sensor signals.

[0023] See also Figure 1-4 , the vacuum separation tank 6 is provided with a vacuum tank blowing valve, the vacuum tank blowing valve is connected to the air source, the vacuum separation tank 6 is connected to the vacuum pump 4 through the vacuum valve, the vacuum separation tank 6 is connected to the gun vacuum valve through the pressure maintaining valve to form a vacuum inlet pipeline of the filling gun, in order to prevent the extracted air containing moisture from directly flowing into the vacuum pump 4, when the moisture at the bottom of the vacuum tank accumulates to a certain extent, the vacuum valve and the pressure maintaining valve are closed, the vacuum tank blowing valve is opened, the air source fills the vacuum separation tank 6 with high-pressure air, the vacuum tank discharge valve is opened, and the accumulated liquid flows into the liquid storage tank 12, the back-suction separation tank 7 is connected to the liquid storage tank 12 through the back-suction tank discharge valve, and the back-suction separation tank 7 is connected to the gun back-suction valve through the back-suction valve to form a filling The back-suction pipeline of the filling gun, the back-suction separation tank 7 is connected to the air source through the back-suction tank blowing valve, and the air source is connected to the back-suction separation tank 7 through the vacuum generator valve and the vacuum generator in turn. The back-suction separation tank 7 and the vacuum separation tank 6 have the same function to ensure the service life of the vacuum generator and realize the recovery of the coolant in the back-suction gas. The vacuum detection valve is connected to the gun vacuum valve to form a detection pipeline for the filling gun. The precision airtight leak detector is connected to the detection component through the pre-filling valve to detect the workpiece connected to the filling gun. The compressed air after the air source processing unit is connected to the upstream of the gun vacuum valve through the blowing valve. The gun vacuum valve is opened and the pressure maintaining valve is closed to blow the pipeline in the filling gun. The structure is ingenious.

[0024] Working principle: The system is equipped with a pressure differential leak detection component, and the detection component is equipped with a gun vacuum detection valve, a charging valve, a vacuum gauge valve, a pre-charging valve, a vacuum gauge and a precision airtight leak detector 14. The precision airtight leak detector 14 is connected to the pre-charging valve and the vacuum gauge through the charging valve, and is connected to the workpiece connected to the filling gun through the gun vacuum valve, so as to realize the pressure differential airtight leak detection function of the equipment on the workpiece. The equipment has pressure differential leak detection and vacuum filling functions. The pressure differential leak detection function is to detect leaks on the workpiece before filling to prevent the risk of leakage after filling, which affects the normal use of the battery module. After the leak detection is completed, the vacuum filling function is provided for the workpiece. The function of the pressure maintaining valve is to close the pressure maintaining valve when the vacuum separation tank 6 is evacuated (or when detecting whether the vacuum pipeline is leaking), so that the downstream The pressure of the filling gun and the workpiece to be filled is maintained to detect whether there is a leak. The volume of the workpiece is usually relatively large, and the inflation speed of the precision airtight leak detector 14 is relatively slow. In order to improve the production rhythm, a pre-inflating function is added to the equipment system. The pre-inflating valve is arranged in the detection component. The compressed air after the air source processing unit is connected to the upstream of the gun vacuum valve through the pre-inflating valve. After it is opened, the workpiece connected to the filling gun is pre-inflated. Before leak detection, the workpiece is filled with a pressure slightly lower than the set value in advance. After stabilizing the pressure, the precision airtight leak detector completes the leak detection of the workpiece through the processes of pressure charging, voltage stabilization, and leak detection.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A pressure differential automobile cooling system leak detection device, comprising a cabinet (1), an electronic control component, a system configuration control valve component, compressed air, a double liquid replenishment barrel, a liquid storage tank (12), a vacuum separation tank (6), a back-suction separation tank (7), a detection component and a vacuum filling gun (16), characterized in that: The cabinet (1) is provided with a control unit, a control cabinet air conditioner (2) and a filling gun swing arm (3); the control valve assembly is provided with an air source processing unit and a pneumatic control valve group; the detection assembly is provided with a gun vacuum detection valve, a charging valve, a vacuum gauge valve, a pre-charging valve, a vacuum gauge and a precision airtight leak detector (14).

2. The differential pressure automobile cooling system leak detection device according to claim 1, characterized in that: The compressed air is respectively connected to the valve of the liquid replenishing pump (15), the gun clamping and releasing valve, the air blowing pressure regulating valve, the fast and slow pressure regulating valve, the pressure control valve, the pre-charging pressure regulating valve, the pressure regulating valve and the leak detector.

3. The differential pressure automobile cooling system leak detection device according to claim 1, characterized in that: The liquid storage tank (12) is connected to the liquid replenishment barrel via a liquid replenishment pump (15) to form a liquid replenishment and liquid storage pipeline. The double liquid replenishment barrels and the liquid replenishment pipeline are provided with a filter and a flow switch, and a liquid level sensor is provided in the liquid storage tank (12).

4. The differential pressure automobile cooling system leak detection device according to claim 1, characterized in that: The liquid storage tank (12) is connected to the filling valve via the filling pump (5), and the filling valve is connected to the gun filling valve to form a filling pipeline of the filling gun. An overflow valve, a one-way valve, a filter, a flow meter, a pressure sensor, and a pressure gauge (17) are provided between the filling pump (5) and the filling valve, and the overflow valve is connected to the liquid storage tank (12).

5. The differential pressure automobile cooling system leak detection device according to claim 1, characterized in that: The vacuum separation tank (6) is provided with a vacuum tank blowing valve, the vacuum tank blowing valve is connected to an air source, the vacuum separation tank (6) is connected to a vacuum pump (4) via the vacuum valve, and the vacuum separation tank (6) is connected to a gun vacuum valve via a pressure-maintaining valve to form a vacuum inlet pipeline of a filling gun.

6. The differential pressure automobile cooling system leak detection device according to claim 1, characterized in that: The back-suction separation tank (7) is connected to the liquid storage tank (12) via the back-suction tank discharge valve, the back-suction separation tank (7) is connected to the gun back-suction valve via the back-suction valve to form a back-suction pipeline of the filling gun, the back-suction separation tank (7) is connected to the air source via the back-suction tank air blowing valve, and the air source is connected to the back-suction separation tank (7) via the vacuum generator valve and the vacuum generator in turn.

7. The differential pressure automobile cooling system leak detection device according to claim 1, characterized in that: The vacuum detection valve is connected to the gun vacuum valve to form a detection pipeline of the filling gun, the precision airtight leak detector (14) is connected to the detection component through the pre-filling valve, the workpiece connected to the detection filling gun, and the compressed air after the air source processing unit is connected to the upstream of the gun vacuum valve through the blowing valve.

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