CN116046299B

CN116046299B - Automobile water tank detection device

Info

Publication number: CN116046299B
Application number: CN202310309507.4A
Authority: CN
Inventors: 徐罗华; 张欣欣
Original assignee: Changzhou Leihana Machinery Co ltd
Current assignee: Changzhou Leihana Machinery Co ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-06-13
Anticipated expiration: 2043-03-28
Also published as: CN116046299A

Abstract

The invention relates to the field of automobile water tank testing, in particular to an automobile water tank detection device which is provided with a sealable box body, a pressurizing pipeline and a negative pressure pipeline, wherein the pressurizing pipeline and the negative pressure pipeline are respectively connected with the box body; when the pressurizing pipeline is connected with the first pipe joint and the second pipe joint on the box body, the negative pressure pipeline is connected with the third pipe joint and the fourth pipe joint; when the pressurizing pipeline is connected with a third pipe joint and a fourth pipe joint on the box body, the negative pressure pipeline is connected with the first pipe joint and the second pipe joint; valves for connecting or disconnecting the pipelines are arranged between the pressurizing pipeline and the negative pressure pipeline and between the negative pressure pipeline and the box body respectively. The water filling detection device has the advantages that the traditional water filling detection function is reserved, meanwhile, the rapid detection capability is realized, and the detection efficiency can be improved; the adaptability is strong, and the water filling and draining pipeline arrangement is not relied on; the structure is simple and reliable, the device has multiple detection modes, is especially suitable for frequent tests and multiple test modes in product trial production, and can also be suitable for daily detection in a production line.

Description

Automobile water tank detection device

Technical Field

The invention relates to the field of automobile water tank testing, in particular to an automobile water tank detection device.

Background

The heat of the engine is not much increased after the heat of the cylinder body is absorbed because the specific heat capacity of the cooling liquid is large, so the heat of the engine is dissipated in a convection way through the cooling liquid loop and then through a large-area radiating fin, thereby maintaining the proper working temperature of the engine.

All parts of the automobile water tank are formed together through welding, so that the risk of leakage exists at the welding position, and the water tank needs to be subjected to leakage detection after production is completed. In the product research and development process, test products at different stages also need to be detected to different degrees to verify the feasibility of the product, and pattern tests also need to be carried out before production so as to avoid the problem of product quality as much as possible.

The existing method for checking the air tightness (leakage) of the automobile water tank is generally to manually press the machined tank body in water and observe whether air bubbles formed by overflow exist in the water or not so as to judge the air tightness. The inventor has proposed a technical solution for performing analog detection on an actual driving state in a previously disclosed patent document CN114964627a, and has proposed different improved technical solutions according to different problems in the industry, for example, a new technical solution is proposed for improving detection efficiency in a patent document CN109029862 a.

However, the existing leak detection device needs to be connected with a water channel, has troublesome water filling and draining, long time and lower efficiency. Especially when often changing the condition such as product specification or small batch trial production or product development stage test, usually a product improvement model just need be equipped with a set of corresponding check out test set, and the cost is higher and consuming time is longer, and efficiency is extremely low, frequently fills drainage or frequently carries out the change of pipeline and also causes the environment to leak when the product development is tested.

Disclosure of Invention

In view of the above situation, in order to solve the problems of the above technology, the present invention provides an automobile water tank detection device, which has a rapid detection capability while retaining the conventional water filling detection function, and can improve the detection efficiency; the adaptability is strong, and the water filling and draining pipeline arrangement is not relied on; the structure is simple and reliable, the device has multiple detection modes, is especially suitable for frequent tests and multiple test modes in product trial production, and can also be suitable for daily detection in a production line.

The automobile water tank detection device is provided with a sealable box body, wherein a space for accommodating an automobile water tank to be detected is formed in the box body, and a first pipe joint, a second pipe joint, a third pipe joint and a fourth pipe joint which are communicated with the space inside and outside the box body are formed in the box body; the automobile water tank is further provided with a first connecting hose and a second connecting hose, one ends of the first connecting hose and the second connecting hose are respectively connected with a water inlet and a water outlet of the automobile water tank, and the other ends of the first connecting hose and the second connecting hose are respectively connected with a first pipe joint and a second pipe joint or a third pipe joint and a fourth pipe joint; the device is also provided with a pressurizing pipeline and a negative pressure pipeline, and the pressurizing pipeline and the negative pressure pipeline are respectively connected with the box body; when the pressurizing pipeline is connected with the first pipe joint and the second pipe joint on the box body, the negative pressure pipeline is connected with the third pipe joint and the fourth pipe joint; when the pressurizing pipeline is connected with a third pipe joint and a fourth pipe joint on the box body, the negative pressure pipeline is connected with the first pipe joint and the second pipe joint; valves for connecting or disconnecting the pipelines are arranged between the pressurizing pipeline and the box body respectively.

Further, the pressurizing pipeline is provided with a water pump, a water way pressure regulating valve, a water way switching valve and a water way check valve, and the water pump, the water way pressure regulating valve, the water way switching valve and the water way check valve are sequentially connected through a water pipeline, and an outlet pipeline of the water way check valve is connected with the box body.

Further, the pressurizing pipeline is provided with an air pump, an air passage pressure regulating valve, an air passage switching valve and an air passage one-way valve, and the air pump, the air passage pressure regulating valve, the air passage switching valve and the air passage one-way valve are sequentially connected through an air pipeline, and an outlet pipeline of the air passage one-way valve is connected with the box body.

Preferably, the pressurizing pipeline is further provided with a liquid adding bin, the liquid adding bin is connected between the gas circuit switching valve and the gas circuit one-way valve through pipelines, and a liquid adding switching valve is further arranged between the liquid adding bin and the gas pipeline.

Further, the pressurizing pipeline is further provided with a pressure relief outlet pipeline, one end of the pressure relief outlet pipeline is connected with the box body, the other end of the pressure relief outlet pipeline is communicated with the pressure relief water tank, and a pressure relief switching valve is further arranged between the box body and the pressure relief water tank.

Further, a first pressure sensor is further arranged on the pressure relief outlet pipeline, the first pressure sensor is arranged between the pressure relief switching valve and the box body, and a first sensor switching valve is further arranged between the box body and the first pressure sensor.

Preferably, the negative pressure pipeline is provided with a vacuum pump and a vacuum switching valve, the vacuum pump and the vacuum switching valve are connected through a first negative pressure pipeline, and the vacuum switching valve is connected with the box body.

Preferably, the negative pressure pipeline is further provided with a second vacuum switching valve, the vacuum pump is connected with the second vacuum switching valve through the second negative pressure pipeline, the second vacuum switching valve is connected with the box body, and a mass flow sensor is further arranged between the second vacuum switching valve and the box body.

Further, a second pressure sensor is further arranged on the second negative pressure pipeline, the second pressure sensor is arranged between the mass flow sensor and the box body, and a second sensor switching valve is further arranged between the second negative pressure pipeline and the second pressure sensor.

Further, a box body pressure sensor is arranged on the box body, and a box body sensor switching valve is further arranged between the box body pressure sensor and the box body.

Preferably, the pressurizing pipeline is provided with a water pump, a water way pressure regulating valve, a water way switching valve and a water way check valve, and the water pump, the water way pressure regulating valve, the water way switching valve and the water way check valve are sequentially connected through a water pipeline, and an outlet pipeline of the water way check valve is connected with a first pipe joint on the box body; the pressurizing pipeline is provided with an air pump, an air passage pressure regulating valve, an air passage switching valve and an air passage one-way valve, the air pump, the air passage pressure regulating valve, the air passage switching valve and the air passage one-way valve are sequentially connected through an air passage, and an outlet pipeline of the air passage one-way valve is connected with a first pipe joint on the box body; the pressurizing pipeline is also provided with a pressure relief outlet pipeline, one end of the pressure relief outlet pipeline is connected with a second pipe joint on the box body, the other end of the pressure relief outlet pipeline is communicated with a pressure relief water tank, and a pressure relief switching valve is arranged between the box body and the pressure relief water tank; the negative pressure pipeline is provided with a vacuum pump and a vacuum switching valve, the vacuum pump is connected with the vacuum switching valve through a first negative pressure pipeline, and the vacuum switching valve is connected with a third pipe joint on the box body; the negative pressure pipeline is also provided with a second vacuum switching valve, the vacuum pump is connected with the second vacuum switching valve through the second negative pressure pipeline, the second vacuum switching valve is connected with a fourth pipe joint on the box body, and a mass flow sensor is also arranged between the second vacuum switching valve and the box body; the pressure relief outlet pipeline is also provided with a first pressure sensor, and the box body is provided with a box body pressure sensor.

Preferably, the pressurizing pipeline is provided with a water pump, a water way pressure regulating valve, a water way switching valve and a water way check valve, and the water pump, the water way pressure regulating valve, the water way switching valve and the water way check valve are sequentially connected through a water pipeline, and an outlet pipeline of the water way check valve is connected with a fourth pipe joint on the box body; the pressurizing pipeline is provided with an air pump, an air passage pressure regulating valve, an air passage switching valve and an air passage one-way valve, the air pump, the air passage pressure regulating valve, the air passage switching valve and the air passage one-way valve are sequentially connected through an air passage, and an outlet pipeline of the air passage one-way valve is connected with a fourth pipe joint on the box body; the pressurizing pipeline is also provided with a pressure relief outlet pipeline, one end of the pressure relief outlet pipeline is connected with a third pipe joint on the box body, the other end of the pressure relief outlet pipeline is communicated with a pressure relief water tank, and a pressure relief switching valve is arranged between the box body and the pressure relief water tank; the negative pressure pipeline is provided with a vacuum pump and a vacuum switching valve, the vacuum pump is connected with the vacuum switching valve through a first negative pressure pipeline, and the vacuum switching valve is connected with a first pipe joint on the box body; the negative pressure pipeline is also provided with a second vacuum switching valve, the vacuum pump is connected with the second vacuum switching valve through the second negative pressure pipeline, the second vacuum switching valve is connected with a second pipe joint on the box body, and a mass flow sensor is also arranged between the second vacuum switching valve and the box body; the second negative pressure pipeline is also provided with a second pressure sensor, and the box body is provided with a box body pressure sensor.

After the technology provided by the invention is adopted, the automobile water tank detection device provided by the embodiment of the invention has the following beneficial effects:

1. through setting a closed negative pressure environment, the automobile water tanks with different specifications can be directly placed into the closed negative pressure environment for air tightness detection, and the adaptability is strong;

2. the water filling detection device has the advantages that the traditional water filling detection function is reserved, meanwhile, the rapid detection capability is realized, and the detection efficiency can be improved;

3. the structure is simple and reliable, the adaptability is strong, and the device is not dependent on the arrangement of a water filling and draining pipeline;

4. by adjusting the control pressure and setting the dwell time, the requirements of different air tightness degrees can be considered, and destructive type tests can be carried out if necessary;

5. the device has multiple detection modes, is especially suitable for frequent tests and multiple test mode requirements during product trial production, and can also be suitable for daily detection in a production line.

Drawings

Fig. 1 is a schematic diagram of the structure of a box according to embodiments 1 and 2 of the present invention;

fig. 2 is a schematic structural diagram of an automobile water tank detection device according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of an automobile radiator detection apparatus according to embodiment 2 of the present invention.

Reference numerals illustrate: the tank 1, the first pipe joint 11, the second pipe joint 12, the third pipe joint 13, the fourth pipe joint 14, the first connection hose 21, the second connection hose 22, the water pump 31, the waterway pressure regulating valve 32, the waterway switching valve 33, the waterway check valve 34, the air pump 41, the pneumatic pressure regulating valve 42, the pneumatic pressure regulating valve 43, the pneumatic pressure regulating valve 44, the liquid adding bin 51, the liquid adding switching valve 52, the pressure releasing switching valve 58, the pressure releasing water tank 59, the vacuum pump 60, the vacuum switching valve 61, the second vacuum switching valve 62, the mass flow sensor 620, the automobile water tank 9, the tank pressure sensor 90, the tank sensor switching valve 900, the water inlet 901, the water outlet 902, the first pressure sensor 91, the first sensor switching valve 910, the second pressure sensor 92, and the second sensor switching valve 920.

Detailed Description

Various preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The following description is provided with reference to the accompanying drawings to assist in the understanding of the exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details that aid in understanding, but they are to be considered exemplary only. Accordingly, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. Moreover, a detailed description of functions and configurations well known in the art will be omitted for the sake of clarity and conciseness of the present specification.

Example 1

As shown in fig. 1 and 2, an automobile water tank detection device is provided with a sealable box body 1, a space for accommodating an automobile water tank 9 to be detected is arranged in the box body 1, and a first pipe joint 11, a second pipe joint 12, a third pipe joint 13 and a fourth pipe joint 14 which are communicated with the space inside and outside the box body 1 are arranged on the box body 1; there are also provided a first connection hose 21 and a second connection hose 22, one ends of the first connection hose 21 and the second connection hose 22 are respectively connected with a water inlet 901 and a water outlet 902 of the automobile radiator 9, and the other ends of the first connection hose 21 and the second connection hose 22 are respectively connected with the first pipe joint 11 and the second pipe joint 12 or respectively connected with the third pipe joint 13 and the fourth pipe joint 14.

The automobile water tank detection device is also provided with a pressurizing pipeline and a negative pressure pipeline, and the pressurizing pipeline and the negative pressure pipeline are respectively connected with the tank body 1; when the pressurizing pipeline is connected with the first pipe joint 11 and the second pipe joint 12 on the box body 1, the negative pressure pipeline is connected with the third pipe joint 13 and the fourth pipe joint 14; when the pressurizing pipeline is connected with a third pipe joint 13 and a fourth pipe joint 14 on the box body 1, the negative pressure pipeline is connected with a first pipe joint 11 and a second pipe joint 12; valves for switching on or off the pipelines are also respectively arranged between the pressurizing pipeline and the negative pressure pipeline and between the pressurizing pipeline and the box body 1, so as to play a role in switching.

Through the cooperation of the sealable box body 1 and a plurality of pipe joints on the sealable box body, a pressurizing pipeline and a negative pressure pipeline, the rapid switching of a plurality of detection modes can be realized. It is possible to fill water in the vehicle tank 9 or the tank body 1 using only the pressurized line and observe the leakage condition, thereby realizing the conventional water filling detection function. The automobile water tank 9 can be filled with water or inflated through the pressurizing pipeline, the tank body 1 is vacuumized to generate negative pressure, and the discharge of the leakage point of the automobile water tank 9 is quickened in a negative pressure environment, so that the leakage detection and judgment are faster. Especially, through the cooperation of pressurization pipeline inflation and negative pressure pipeline evacuation, can greatly improve detection efficiency to because positive pressure and negative pressure are located respectively inside and outside the car water tank 9, thereby exert less pressure and can produce very big pressure differential, can detect the load capacity of car water tank 9 with the detection pressure that surpasses car water tank 9 normal operating pressure, and do not need to carry out operating mode simulation operation such as heating under this detection mode. Other modes do not need to rely on a water fill and drain line, except that the conventional mode is used to pressurize water in the pressurization line.

The first pipe joint 11, the second pipe joint 12, the third pipe joint 13 and the fourth pipe joint 14 are provided with various connection types, different connection combinations can be carried out according to the needs, and the connection between the first connecting hose 21 and the second connecting hose 22 and the first pipe joint 11, the second pipe joint 12, the third pipe joint 13 and the fourth pipe joint 14 is also provided with various connection types, and different connection combinations can be carried out according to the needs, so that the device provided by the invention has extremely strong flexibility, can be suitable for various different detection requirements, has various detection modes, is especially suitable for frequent tests and various test modes during product trial production, and can also be suitable for daily detection deployed in a production line.

The pressurization piping is further described below.

As shown in fig. 2, the pressurization line may be provided as a water line, specifically, a water pump 31, a water path pressure regulating valve 32, a water path switching valve 33, and a water path check valve 34 are provided, and the water pump 31, the water path pressure regulating valve 32, the water path switching valve 33, and the water path check valve 34 are sequentially connected through the water line, and an outlet line of the water path check valve 34 is connected to the tank 1.

Under the condition that the switching valves of other pipelines are closed, the waterway switching valve 33 can be opened to detect in a water pressurization mode, and the outlet pipeline of the waterway one-way valve 34 can be directly communicated with the inner space of the box body 1 or can be communicated with the automobile water tank 9 to be detected through a connecting hose. In addition to the traditional water leak detection, destructive testing can be performed by high pressure means. For example, the high pressure is applied to the automobile water tank 9 to be detected to break the leakage point, the automobile water tank is particularly suitable for being used in research and development experiments, and if the automobile water tank is matched with a negative pressure pipeline, the positive pressure applied by the pressure pipeline is not required to be too high, so that the efficiency is high.

The pressurization pipeline may also be configured as an air pipeline, specifically, the pressurization pipeline is provided with an air pump 41, an air passage pressure regulating valve 42, an air passage switching valve 43 and an air passage one-way valve 44, and the air pump 41, the air passage pressure regulating valve 42, the air passage switching valve 43 and the air passage one-way valve 44 are sequentially connected through the air pipeline, and an outlet pipeline of the air passage one-way valve 44 is connected with the box 1.

Under the condition that the switching valves of other pipelines are closed, the gas path switching valve 43 can be opened to detect by using a gas pressurization mode, and the outlet pipeline of the gas path one-way valve 44 can be directly communicated with the internal space of the box body 1 or can be communicated with the automobile water tank 9 to be detected through a connecting hose. In addition to routine leak detection, destructive testing can also be performed by high pressure means. The device is particularly suitable for research and development experiments by applying high pressure or impact pressure in the automobile water tank 9 to be detected to break leakage points, and the positive pressure applied by the pressurizing pipeline is not required to be too high if the device is matched with a negative pressure pipeline for use, so that the efficiency is high.

As a preferable scheme, the pressurizing pipeline is further provided with a liquid adding bin 51, the liquid adding bin 51 is connected between the gas path switching valve 43 and the gas path unidirectional valve 44 through a pipeline, and a liquid adding switching valve 52 is further arranged between the liquid adding bin 51 and the gas pipeline. In the case of detecting by the gas pressurization method, one method of judging leakage is to judge by sound at the time of gas leakage. But in some cases the source orientation of the sound is not easily determined. Under the condition that the gas circuit switching valve 43 and the liquid adding switching valve 52 are opened, liquid in the liquid adding bin 51 can be brought into the automobile water tank 9 to be detected, and if the automobile water tank 9 to be detected leaks, the liquid brought into the liquid adding bin 51 overflows from the leakage point, so that the position of the leakage point can be known more clearly. This approach is less liquid to use than conventional water detection, and the leak indication is more pronounced. The liquid in the liquid charging chamber 51 may be colored liquid or foam, so long as a mark with obvious visual effect can be generated during liquid spraying.

In this embodiment, both water and air lines are used in parallel. The rapid high-efficiency detection performance is obtained, the traditional water detection mode is reserved, and the multifunctional water detection device is multifunctional.

The pressurizing pipeline is further provided with a pressure relief outlet pipeline, one end of the pressure relief outlet pipeline is connected with the box body 1, the other end of the pressure relief outlet pipeline is communicated with a pressure relief water tank 59, and a pressure relief switching valve 58 is further arranged between the box body 1 and the pressure relief water tank 59. After the test is completed, the pressure release switching valve 58 may be opened to vent the liquid or gas.

The pressure relief outlet pipeline is further provided with a first pressure sensor 91, the first pressure sensor 91 is arranged between the pressure relief switching valve 58 and the box body 1, and a first sensor switching valve 910 is further arranged between the box body 1 and the first pressure sensor 91.

After the pressurization pipeline and/or the negative pressure pipeline is pressurized or vacuumized and stabilized for a specific time, if the automobile water tank 9 to be detected has no leakage, the pressure in the pipeline can be basically consistent no matter the pressurization pipeline or the negative pressure pipeline at the moment, the first pressure sensor 91 is used for monitoring the pressure of the pressurization pipeline, after the first sensor switching valve 910 is opened for a certain time, if the pressure indicated by the first pressure sensor 91 is kept stable, the existence of leakage can be judged, and if the pressure cannot be stabilized or fluctuates greatly all the time, the existence of leakage can be considered.

An occasional case is that the pressure of the pressurizing line and the negative pressure line happen to be balanced in spite of leakage, so that the indicated pressure is basically stable, and the device can easily solve the problem, so long as the pressure of the pressurizing line is changed to carry out an additional detection step when the pressure gauge is stable in a model test, and the situation can be eliminated if the pressure gauge is stable after a period of time.

The negative pressure line is further described below.

The negative pressure pipeline comprises a first negative pressure pipeline and a second negative pressure pipeline, and the first negative pressure pipeline and the second negative pressure pipeline are connected in parallel generally, but share the vacuum pump 60. Specifically, the first negative pressure line is connected to the vacuum pump 60 and the vacuum switching valve 61, and the second negative pressure line is connected to the vacuum pump 60, the second vacuum switching valve 62, and the mass flow sensor 620. When the negative pressure pipeline is used for detection, only the first negative pressure pipeline or the second negative pressure pipeline can be used, or the first negative pressure pipeline and the second negative pressure pipeline can both be used for detection, and the specific use method is described in the following.

As shown in fig. 2, in the present embodiment, the negative pressure line is provided with a vacuum pump 60 and a vacuum switching valve 61, the vacuum pump 60 and the vacuum switching valve 61 are connected through a first negative pressure line, and the vacuum switching valve 61 is connected to the tank 1. Under the condition that the switching valves of other pipelines are all closed on the pipeline where the switching valves are located, the vacuum switching valve 61 can be opened to detect through a first negative pressure pipeline in a negative pressure mode, and the first negative pressure pipeline can be directly communicated with the inner space of the box body 1 or can be communicated with the automobile water tank 9 to be detected through a connecting hose. If the automobile water tank 9 to be detected has no leakage, vacuum is pumped through the negative pressure pipeline, and the pressure in the pipeline can reach the preset vacuum degree and keep stable. At this time, according to the different connection modes, the pressure sensor 90 or the second pressure sensor 92 of the box is monitored, if the pressure is kept stable for a certain time, it can be judged that no leakage exists, and if the pressure is always unable to be stable or fluctuates greatly, it can be considered that the leakage exists. However, the first negative pressure pipeline is suitable for being matched with a pressurizing pipeline, especially is matched with an air pressurizing mode, and the efficiency is high.

As a preferable solution, the negative pressure pipeline is further provided with a second vacuum switching valve 62, the vacuum pump 60 is connected with the second vacuum switching valve 62 through the second negative pressure pipeline, the second vacuum switching valve 62 is connected with the box 1, and a mass flow sensor 620 is further provided between the second vacuum switching valve 62 and the box 1. The first negative pressure pipeline basically meets the requirement of leakage detection, but in the case of small leakage, the detection cannot reach high accuracy, and the condition of missed detection is likely to exist. Therefore, if the detection accuracy requirement is higher, the second negative pressure pipeline can be started. The second negative pressure line is provided with a mass flow sensor 620 to determine whether there is a small leak at a higher level of accuracy.

Under the condition that the switching valves of other pipelines are all closed on the pipeline where the switching valves are located, the second vacuum switching valve 62 can be opened to detect through a second negative pressure pipeline in a negative pressure mode, and the second negative pressure pipeline can be directly communicated with the inner space of the box body 1 or can be communicated with the automobile water tank 9 to be detected through a connecting hose. If the automobile water tank 9 to be detected has no leakage, vacuum is pumped through the negative pressure pipeline, and the pressure in the pipeline can reach the preset vacuum degree and keep stable. At this time, according to the different connection modes, the mass flow sensor 620 and/or the tank pressure sensor 90 and/or the second pressure sensor 92 are/is monitored, if the pressure is kept stable after the pressure is maintained for a certain time, it can be determined that no leakage exists, and if the pressure is always unable to be stable or fluctuates greatly, it can be considered that the leakage exists. However, the first negative pressure pipeline is suitable for being matched with a pressurizing pipeline, especially is matched with an air pressurizing mode, and the efficiency is high.

Further, a second pressure sensor 92 is further disposed on the second negative pressure pipeline, the second pressure sensor 92 is disposed between the mass flow sensor 620 and the tank 1, and a second sensor switching valve 920 is further disposed between the second negative pressure pipeline and the second pressure sensor 92.

After the pressurization pipeline and/or the negative pressure pipeline are pressurized or vacuumized and stabilized for a specific time, if the automobile water tank 9 to be detected has no leakage, the pressure in the pipeline can be basically consistent no matter the pressurization pipeline or the negative pressure pipeline at the moment, the second pressure sensor 92 is used for monitoring the pressure of the negative pressure pipeline, after the second sensor switching valve 920 is opened for a certain time, if the pressure indicated by the second pressure sensor 92 is kept stable, the existence of leakage can be judged, and if the pressure cannot be stabilized or fluctuates greatly all the time, the existence of leakage can be considered.

Further, a tank pressure sensor 90 is provided on the tank 1, and a tank sensor switching valve 900 is further provided between the tank pressure sensor 90 and the tank 1.

In this embodiment, the first negative pressure pipeline and the second negative pressure pipeline are both connected in parallel. Through the switching-on and switching-off operation of each switching valve, water pipeline, air pipeline, first negative pressure pipeline and second negative pressure pipeline can be used alone respectively, also can cooperate the use to can realize a plurality of combinations, adapt to different detection demands, realize various different detection modes, possess the multifunctionality.

For frequent testing in research and development experiments, the following specific connection scheme may be employed.

The outlet pipeline of the waterway check valve 34 is connected with the first pipe joint 11 on the box body 1, and the outlet pipeline of the waterway check valve 44 is connected with the first pipe joint 11 on the box body 1; one end of the pressure relief outlet pipeline is connected with the second pipe joint 12 on the box body 1, and the other end of the pressure relief outlet pipeline is communicated with the pressure relief water tank 59.

The vacuum switching valve 61 is connected to the third pipe joint 13 of the casing 1, and the second vacuum switching valve 62 is connected to the fourth pipe joint 14 of the casing 1. The pressure release outlet pipeline is provided with a first pressure sensor 91, and the box 1 is provided with a box pressure sensor 90. One ends of the first and

second connection hoses

21 and 22 are connected to the water inlet 901 and the water outlet 902 of the vehicle water tank 9, respectively, and the other ends of the first and

second connection hoses

21 and 22 are connected to the first and second pipe joints 11 and 12, respectively.

The connecting mode is mainly suitable for research and development tests, the pressurizing pipeline is communicated with the automobile water tank 9 to be detected through the connecting hose, the negative pressure pipeline is directly communicated with the inner space of the box body 1 to provide a negative pressure environment for the automobile water tank 9 to be detected, and the automobile water tank 9 to be detected can be subjected to detection in various modes such as different pressures, different dwell times and the like, and can be subjected to destructive tests.

Example 2

The difference between this embodiment and embodiment 1 is that the specific connection manner of the first pipe joint 11, the second pipe joint 12, the third pipe joint 13 and the fourth pipe joint 14 is different, so that the present embodiment is more suitable for use in a stable environment with relatively less product variation such as a production line.

Specifically, as shown in fig. 1 and 3, the pressurization pipeline is provided with a water pump 31, a water path pressure regulating valve 32, a water path switching valve 33 and a water path one-way valve 34, wherein the water pump 31, the water path pressure regulating valve 32, the water path switching valve 33 and the water path one-way valve 34 are sequentially connected through water pipelines, and an outlet pipeline of the water path one-way valve 34 is connected with a fourth pipe joint 14 on the box body 1; the pressurizing pipeline is provided with an air pump 41, an air passage pressure regulating valve 42, an air passage switching valve 43 and an air passage one-way valve 44, wherein the air pump 41, the air passage pressure regulating valve 42, the air passage switching valve 43 and the air passage one-way valve 44 are sequentially connected through an air pipeline, and an outlet pipeline of the air passage one-way valve 44 is connected with a fourth pipe joint 14 on the box body 1; the pressurizing pipeline is also provided with a pressure relief outlet pipeline, one end of the pressure relief outlet pipeline is connected with a third pipe joint 13 on the box body 1, the other end of the pressure relief outlet pipeline is communicated with a pressure relief water tank 59, and a pressure relief switching valve 58 is further arranged between the box body 1 and the pressure relief water tank 59; the negative pressure pipeline is provided with a vacuum pump 60 and a vacuum switching valve 61, the vacuum pump 60 and the vacuum switching valve 61 are connected through a first negative pressure pipeline, and the vacuum switching valve 61 is connected with a first pipe joint 11 on the box body 1; the negative pressure pipeline is also provided with a second vacuum switching valve 62, the vacuum pump 60 is connected with the second vacuum switching valve 62 through the second negative pressure pipeline, the second vacuum switching valve 62 is connected with a second pipe joint 12 on the box body 1, and a mass flow sensor 620 is also arranged between the second vacuum switching valve 62 and the box body 1; the second negative pressure pipeline is also provided with a second pressure sensor 92, and the box body 1 is provided with a box body pressure sensor 90. One ends of the first and

second connection hoses

The connecting mode is mainly applicable to production lines, at the moment, the pressurizing pipeline is directly communicated with the inner space of the box body 1, and the negative pressure pipeline is communicated with the automobile water tank 9 to be detected through a connecting hose. In the mode, the vacuum pumping workload of the negative pressure pipeline is relatively small, and the efficiency is high; the operator only needs to connect the first connecting hose 21 and the second connecting hose 22 with the automobile water tank 9 to be detected through the quick connector, and the workload in operation is low; as for the pressurization inside the box body 1, the air pressurization mode is adopted to achieve high speed, so that the requirement of quick detection of a production line is met, and even if the traditional water pressurization mode is adopted, the pressurization can be successfully completed. Because the pressurizing pipeline is directly connected with the box body 1, the arrangement of the production line is more convenient.

The above examples 1 and 2 illustrate two preferred embodiments of the present invention, respectively. In fact, the technical solution of the present invention provides more functional modes, and the use performance and modes of the first pipe joint 11, the second pipe joint 12, the third pipe joint 13 and the fourth pipe joint 14 are different from those of other components, so that a user can select and use the first pipe joint, the second pipe joint 12, the third pipe joint 13 and the fourth pipe joint according to the actual needs according to the embodiment 1 or the embodiment 2.

Further, in the above embodiment of the present invention, the box 1 is provided with a door that can be opened and closed to put in or take out the automobile water tank, a sealing ring is disposed between the door and the box body, and at least one transparent observation window is disposed on the door or the box 1 body.

In the embodiment of the invention, the pipeline connection, particularly the connection of the first connecting hose 21 and the second connecting hose 22, can be connected by adopting a quick pipe joint, so that the connection is convenient to change to switch different test modes. When the pipe joint connecting production line is deployed in the production line, the pipe joint connecting production line can be connected or spliced in a fixed position mode without considering the convenience of the splicing.

The switching valves can be two-way electromagnetic valves to realize the on-off of the pipeline, and the pressure regulating valves can be common pressure regulating valves/flow control valves.

It should be noted that, in the embodiment of the present invention, only the pressure sensor is indicated, but it should be understood by those skilled in the art that the pressure sensor or the pressure gauge used in the pressurization pipeline and the negative pressure pipeline are different, and should be selected according to the properties of different pipelines in a conventional design manner. For example, in this embodiment of the present application, the tank pressure sensor 90 is disposed on the tank 1, when the negative pressure pipeline is directly communicated with the interior of the tank 1, the tank pressure sensor 90 should select a sensor or a pressure gauge suitable for being matched with the vacuum pump for use at this time, and when the negative pressure pipeline passes through the tank 1 and is communicated with the automobile water tank 9 to be detected through the first or the second connecting hose, the vacuum pressure gauge can be disposed on the negative pressure pipeline, at this time, because the internal space of the tank 1 is connected with the pressurizing pipeline or is not used, the tank pressure sensor 90 can select a common pressure sensor or pressure gauge. Of course, if the mode is frequently switched in actual use, a plurality of pressure sensors of different types can be installed on the box body 1, each pipeline is provided with a pressure sensor, and a switching valve is arranged in front of the pressure sensor so as to control whether the pressure sensor is connected with the corresponding pipeline.

In general, according to the automobile water tank detection device provided by the embodiment of the invention, through setting a closed negative pressure environment, automobile water tanks with different specifications can be directly placed into the automobile water tank detection device for air tightness detection, so that the adaptability is strong; the water filling detection device has the advantages that the traditional water filling detection function is reserved, meanwhile, the rapid detection capability is realized, and the detection efficiency can be improved; the structure is simple and reliable, the adaptability is strong, and the device is not dependent on the arrangement of a water filling and draining pipeline; by adjusting the control pressure and setting the dwell time, the requirements of different air tightness degrees can be considered, and destructive type tests can be carried out if necessary; the device has multiple detection modes, is especially suitable for frequent tests and multiple test mode requirements during product trial production, and can also be suitable for daily detection in a production line.

The foregoing has outlined rather broadly the more detailed description of the invention in order that the detailed description of the principles and embodiments of the invention may be implemented in conjunction with the detailed description of the invention that follows, the examples being merely intended to facilitate an understanding of the method of the invention and its core concepts; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

From the description of the embodiments above, it will be apparent to those skilled in the art that the invention may be practiced. Of course, the above listed cases are only examples, and the present invention is not limited thereto. Those skilled in the art will appreciate that other variations or simplifications of the inventive solution may be suitably employed in the present invention and are intended to be included within the scope of the present invention.

Claims

1. The automobile water tank detection device is characterized by comprising a sealable box body (1), wherein a space for accommodating an automobile water tank (9) to be detected is formed in the box body (1), and a first pipe joint (11), a second pipe joint (12), a third pipe joint (13) and a fourth pipe joint (14) which are communicated with the space inside and outside the box body (1) are formed in the box body (1); the automobile water tank is further provided with a first connecting hose (21) and a second connecting hose (22), one ends of the first connecting hose (21) and the second connecting hose (22) are respectively connected with a water inlet (901) and a water outlet (902) of the automobile water tank (9), and the other ends of the first connecting hose (21) and the second connecting hose (22) are respectively connected with a first pipe joint (11) and a second pipe joint (12) or respectively connected with a third pipe joint (13) and a fourth pipe joint (14); the device is also provided with a pressurizing pipeline and a negative pressure pipeline, and the pressurizing pipeline and the negative pressure pipeline are respectively connected with the box body (1); when the pressurizing pipeline is connected with a first pipe joint (11) and a second pipe joint (12) on the box body (1), the negative pressure pipeline is connected with a third pipe joint (13) and a fourth pipe joint (14); when the pressurizing pipeline is connected with a third pipe joint (13) and a fourth pipe joint (14) on the box body (1), the negative pressure pipeline is connected with a first pipe joint (11) and a second pipe joint (12); valves for connecting or disconnecting the pipelines are arranged between the pressurizing pipeline and the negative pressure pipeline and between the pressurizing pipeline and the box body (1) respectively; the negative pressure pipeline comprises a first negative pressure pipeline and a second negative pressure pipeline, a mass flow sensor (620) is arranged on the second negative pressure pipeline, a box body pressure sensor (90) is arranged on the box body (1), and a first pressure sensor (91) and/or a second pressure sensor (92) is arranged on the pressurizing pipeline.

2. The automobile water tank detection device according to claim 1, wherein the pressurization pipeline is provided with a water pump (31), a water way pressure regulating valve (32), a water way switching valve (33) and a water way check valve (34), the water pump (31), the water way pressure regulating valve (32), the water way switching valve (33) and the water way check valve (34) are sequentially connected through water pipelines, and an outlet pipeline of the water way check valve (34) is connected with the box body (1).

3. The automobile water tank detection device according to claim 1, wherein the pressurization pipeline is provided with an air pump (41), an air passage pressure regulating valve (42), an air passage switching valve (43) and an air passage one-way valve (44), and the air pump (41), the air passage pressure regulating valve (42), the air passage switching valve (43) and the air passage one-way valve (44) are sequentially connected through an air pipeline, and an outlet pipeline of the air passage one-way valve (44) is connected with the box body (1).

4. A vehicle water tank detection device according to claim 3, wherein the pressurization pipeline is further provided with a liquid adding bin (51), the liquid adding bin (51) is connected between the gas path switching valve (43) and the gas path unidirectional valve (44) through a pipeline, and a liquid adding switching valve (52) is further arranged between the liquid adding bin (51) and the gas pipeline.

5. The automobile water tank detection device according to claim 1, wherein the pressurization pipeline is further provided with a pressure relief outlet pipeline, one end of the pressure relief outlet pipeline is connected with the tank body (1), the other end of the pressure relief outlet pipeline is communicated with the pressure relief water tank (59), and a pressure relief switching valve (58) is further arranged between the tank body (1) and the pressure relief water tank (59).

6. The automobile water tank detection device according to claim 1, wherein the negative pressure pipeline is provided with a vacuum pump (60) and a vacuum switching valve (61), the vacuum pump (60) and the vacuum switching valve (61) are connected through a first negative pressure pipeline, and the vacuum switching valve (61) is connected with the tank body (1).

7. The automobile water tank detection device according to claim 6, wherein the negative pressure pipeline is further provided with a second vacuum switching valve (62), the vacuum pump (60) is connected with the second vacuum switching valve (62) through the second negative pressure pipeline, the second vacuum switching valve (62) is connected with the tank body (1), and a mass flow sensor (620) is further arranged between the second vacuum switching valve (62) and the tank body (1).

8. The automobile water tank detection device according to claim 1, wherein the pressurization pipeline is provided with a water pump (31), a water way pressure regulating valve (32), a water way switching valve (33) and a water way check valve (34), the water pump (31), the water way pressure regulating valve (32), the water way switching valve (33) and the water way check valve (34) are sequentially connected through water pipelines, and an outlet pipeline of the water way check valve (34) is connected with a first pipe joint (11) on the box body (1); the pressurizing pipeline is provided with an air pump (41), an air passage pressure regulating valve (42), an air passage switching valve (43) and an air passage one-way valve (44), wherein the air pump (41), the air passage pressure regulating valve (42), the air passage switching valve (43) and the air passage one-way valve (44) are sequentially connected through the air pipeline, and an outlet pipeline of the air passage one-way valve (44) is connected with a first pipe joint (11) on the box body (1); the pressurizing pipeline is also provided with a pressure relief outlet pipeline, one end of the pressure relief outlet pipeline is connected with a second pipe joint (12) on the box body (1), the other end of the pressure relief outlet pipeline is communicated with a pressure relief water tank (59), and a pressure relief switching valve (58) is further arranged between the box body (1) and the pressure relief water tank (59); the negative pressure pipeline is provided with a vacuum pump (60) and a vacuum switching valve (61), the vacuum pump (60) and the vacuum switching valve (61) are connected through a first negative pressure pipeline, and the vacuum switching valve (61) is connected with a third pipe joint (13) on the box body (1); the negative pressure pipeline is also provided with a second vacuum switching valve (62), the vacuum pump (60) is connected with the second vacuum switching valve (62) through the second negative pressure pipeline, the second vacuum switching valve (62) is connected with a fourth pipe joint (14) on the box body (1), and a mass flow sensor (620) is further arranged between the second vacuum switching valve (62) and the box body (1); the pressure relief outlet pipeline is further provided with a first pressure sensor (91), and the box body (1) is provided with a box body pressure sensor (90).

9. The automobile water tank detection device according to claim 1, wherein the pressurization pipeline is provided with a water pump (31), a water way pressure regulating valve (32), a water way switching valve (33) and a water way check valve (34), the water pump (31), the water way pressure regulating valve (32), the water way switching valve (33) and the water way check valve (34) are sequentially connected through water pipelines, and an outlet pipeline of the water way check valve (34) is connected with a fourth pipe joint (14) on the box body (1); the pressurizing pipeline is provided with an air pump (41), an air passage pressure regulating valve (42), an air passage switching valve (43) and an air passage one-way valve (44), wherein the air pump (41), the air passage pressure regulating valve (42), the air passage switching valve (43) and the air passage one-way valve (44) are sequentially connected through an air pipeline, and an outlet pipeline of the air passage one-way valve (44) is connected with a fourth pipe joint (14) on the box body (1); the pressurizing pipeline is also provided with a pressure relief outlet pipeline, one end of the pressure relief outlet pipeline is connected with a third pipe joint (13) on the box body (1), the other end of the pressure relief outlet pipeline is communicated with a pressure relief water tank (59), and a pressure relief switching valve (58) is further arranged between the box body (1) and the pressure relief water tank (59); the vacuum pump (60) is connected with the vacuum switching valve (61) through a first negative pressure pipeline, and the vacuum switching valve (61) is connected with a first pipe joint (11) on the box body (1); the negative pressure pipeline is also provided with a second vacuum switching valve (62), the vacuum pump (60) is connected with the second vacuum switching valve (62) through the second negative pressure pipeline, the second vacuum switching valve (62) is connected with a second pipe joint (12) on the box body (1), and a mass flow sensor (620) is further arranged between the second vacuum switching valve (62) and the box body (1); and a second pressure sensor (92) is further arranged on the second negative pressure pipeline, and a box body pressure sensor (90) is arranged on the box body (1).