CN219232391U

CN219232391U - Overflow system of low-pressure wet-heat test box

Info

Publication number: CN219232391U
Application number: CN202320153393.4U
Authority: CN
Inventors: 龙德中; 彭露; 李进
Original assignee: Chongqing Harding Environmental Testing Technology Co ltd
Current assignee: Chongqing Harding Environmental Testing Technology Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-06-23
Anticipated expiration: 2033-01-31

Abstract

The utility model discloses a low-pressure wet and hot test box overflow system, wherein a working chamber is arranged at the upper part of a test box body, a water storage tank is arranged at the lower part of the test box body, a drain pipe and a first air pressure balance pipe are connected between the working chamber and the water storage tank, the drain pipe is connected to the bottom of the working chamber, a first electromagnetic valve is arranged on the drain pipe, and a second electromagnetic valve is arranged on the first air pressure balance pipe; the water storage tank is connected with an overflow pipe and a second air pressure balance pipe, wherein a third electromagnetic valve is arranged on the overflow pipe, a fourth electromagnetic valve is arranged on the second air pressure balance pipe, and the far end of the second air pressure balance pipe is communicated with the atmosphere; the water tank is internally provided with a water level monitoring assembly. The beneficial effects of the utility model are as follows: the accumulated water discharge amount is not limited by the test working time length and the volume of the water storage tank, so that the test box can be ensured to run without stopping for a long time, and the technical problem of difficult accumulated water discharge of the existing test box is solved.

Description

Overflow system of low-pressure wet-heat test box

Technical Field

The utility model relates to an environment test box, in particular to an overflow system of a low-pressure damp-heat test box.

Background

The low-pressure damp-heat test box is environment test equipment capable of simulating different temperatures, different humidities and negative pressure. After the product is placed in the test box, the service performance of the product in different temperature, humidity, damp heat or air pressure environments can be tested and evaluated by changing the environmental parameters in the test box.

The humidity value in the low-pressure wet-hot test box is generally higher in the working process, accumulated water is easy to generate in the working chamber, and the accumulated water is difficult to discharge in real time because the working chamber is in a sealed negative pressure environment. The current drainage means are: the bottom of the test box is provided with a water storage tank which is connected with the working chamber, water is collected by the water storage tank in the operation process of the test box, and the wastewater in the water storage tank is discharged after the test is finished. The defects of the drainage of the accumulated water in the way are as follows: because the compactness of the whole size of the test box is considered, the water storage tank cannot be quite large, the volume of the water storage tank is always limited, and once the condition of overlong test time is met, water in the water storage tank is full, the working chamber still can accumulate water, and the product test is influenced.

Disclosure of Invention

Aiming at the current situation, the utility model provides an overflow system of a low-pressure damp-heat test box, which aims at solving the technical problem of difficult accumulated water drainage.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a low atmospheric pressure damp and hot test box overflow system, includes the test box body, test box body upper portion is equipped with the working chamber, and the lower part is equipped with the storage water tank, its key lies in: a drain pipe and a first air pressure balance pipe are connected between the working chamber and the water storage tank, wherein the drain pipe is connected to the bottom of the working chamber, a first electromagnetic valve is arranged on the drain pipe, and a second electromagnetic valve is arranged on the first air pressure balance pipe; the water storage tank is connected with an overflow pipe and a second air pressure balance pipe, wherein a third electromagnetic valve is arranged on the overflow pipe, a fourth electromagnetic valve is arranged on the second air pressure balance pipe, and the far end of the second air pressure balance pipe is communicated with the atmosphere; the water tank is internally provided with a water level monitoring assembly.

Preferably, the water level monitoring assembly comprises an upper water level floating ball and a lower water level floating ball which are positioned in the height direction of the water storage tank

Preferably, the overflow pipe is connected to the lower part of the water storage tank.

Preferably, a pressure sensor is arranged on the first air pressure balance pipe.

Preferably, a detection interface is reserved on the first air pressure balance pipe.

Preferably, the bottom of the working chamber is provided with a drainage groove, and the drainage pipe is arranged at the bottom of the drainage groove.

Preferably, the test box body is provided with a humidifier, a moisture inlet pipe is arranged on the side wall of the working chamber, the lower half part of the inner end part of the moisture inlet pipe is of a closed structure, and a humidifying pipeline is connected between the humidifier and the outer end of the moisture inlet pipe.

Preferably, the upper half of the inner end of the moisture inlet pipe is of an inclined structure.

Compared with the prior art, the utility model has the beneficial effects that:

by adopting the overflow system of the low-pressure wet-heat test box, which is provided by the utility model, the water storage tank and the working chamber as well as the water storage tank and the atmosphere are alternately communicated by alternately opening and closing the four groups of electromagnetic valves, so that the water storage tank is taken as a transit water tank, and accumulated water in the negative-pressure working chamber is discharged to the outside of the test box on line. By adopting the circulation mode to drain, the accumulated water discharge amount is not limited by the test working time and the volume of the water storage tank, so that the test box can be ensured to run without stopping for a long time, and the technical problem of difficult accumulated water discharge of the existing test box is solved.

Drawings

FIG. 1 is a cross-sectional view of a low air pressure wet heat test chamber;

FIG. 2 is a schematic diagram of the operation of the overflow system of the low-pressure wet heat test chamber;

fig. 3 is an enlarged partial schematic view at a in fig. 1.

Detailed Description

The utility model is further described below with reference to examples and figures.

As shown in fig. 1, the low-pressure damp-heat test box structurally comprises a test box body 1, wherein a working chamber 2 is arranged at the upper part of the test box body 1, and a water storage tank 3 is arranged at the lower part of the test box body. An overflow system is arranged between the working chamber 2 and the water storage tank 3, and the overflow system can continuously drain accumulated water in the working chamber 2 from the water storage tank 3.

The specific connection structure of the overflow system is as follows:

referring to fig. 2, a drain pipe 4 is connected between the bottom of the working chamber 2 and the water storage tank 3, a first electromagnetic valve 6 is installed on the drain pipe 4, a first air pressure balancing pipe 5 is connected between the side of the working chamber 2 and the water storage tank 3, and a second electromagnetic valve 7 is installed on the first air pressure balancing pipe 5. The lower part of the water storage tank 3 is connected with an overflow pipe 8, the other end of the overflow pipe 8 is arranged at a designated drainage position, and a third electromagnetic valve 10 is arranged on the overflow pipe 8. The water storage tank 3 is also connected with a second air pressure balance pipe 9, the other end of the second air pressure balance pipe 9 is communicated with the atmosphere, and a fourth electromagnetic valve 11 is arranged on the second air pressure balance pipe 9. The water tank 3 is internally provided with a water level monitoring component for monitoring the water level depth in real time. In this embodiment, the water level monitoring assembly is composed of an upper water level floating ball 12a and a lower water level floating ball 12b, and the installation height of the upper water level floating ball 12a in the water storage tank 3 is higher than that of the lower water level floating ball 12b. The first electromagnetic valve 6, the second electromagnetic valve 7, the third electromagnetic valve 10, the fourth electromagnetic valve 11, the upper water level floating ball 12a and the lower water level floating ball 12b are cooperatively controlled by the same controller.

Based on the above system arrangement, the working principle of the overflow system is as follows:

in the working process of the test box body 1, the first electromagnetic valve 6 and the second electromagnetic valve 7 are firstly opened, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are closed, at the moment, the water storage tank 3 and the working chamber 2 are communicated by the first air pressure balance pipe 5, the water storage tank 3 and the working chamber 2 keep air pressure balance, and accumulated water at the bottom of the working chamber 2 can be discharged into the water storage tank 3 through the drain pipe 4. When the water level of the water storage tank 3 reaches the height of the upper water level floating ball 12a, the first electromagnetic valve 6 and the second electromagnetic valve 7 are closed, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are opened, at this time, the water storage tank 3 is isolated from the working chamber 2, and the second air pressure balance pipe 9 enables the internal pressure of the water storage tank 3 to be balanced with the atmosphere, so that waste water in the water storage tank 3 can be discharged to a designated place through the overflow pipe 8. When the water level of the water storage tank 3 drops to the position of the water level floating ball 12b, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are closed again, the first electromagnetic valve 6 and the second electromagnetic valve 7 are opened again, and accumulated water in the working chamber 2 is discharged into the water storage tank 3. According to the logic, the water can be prevented from accumulating in the working chamber all the time until the test is finished, and the low-pressure wet-heat test box can be operated for a long time without stopping.

As shown in fig. 1, a moisture inlet pipe 16 is installed on the side wall of the working chamber 2, the inner end of the moisture inlet pipe 16 is positioned in the working chamber 2, a humidifier 15 is arranged at the right part of the test box body 1, a humidifying pipeline 17 is connected between the humidifier 15 and the outer end of the moisture inlet pipe 16, and the humidifier 15 can provide a humidity environment for the interior of the working chamber 2 when working. As can be seen from fig. 3, in this embodiment, the lower half portion of the inner end portion of the moisture inlet pipe 16 is fixedly provided with the baffle 16a, and the baffle 16a makes the lower half portion of the inner end portion of the moisture inlet pipe 16 form a closed structure, which can prevent condensed water generated in the moisture inlet pipe 16 from directly dripping into the working chamber 2, so that on one hand, water accumulation can be reduced, and on the other hand, water dripping on the corresponding components can be avoided. The upper half of the inner end of the moisture inlet pipe 16 has an inclined notch 16b, and the inclined notch 16b enables the upper half of the inner end of the moisture inlet pipe 16 to form an inclined structure, so that water vapor can be better sprayed into the working chamber.

As shown in fig. 2, in order to monitor the working chamber pressure in real time, a pressure sensor 13 is provided on the first air pressure balance pipe 5. In order to facilitate the third party to monitor the environment composition inside the working chamber, a detection interface 14 is also reserved on the first air pressure balance pipe 5.

As shown in fig. 1, a drain tank 2a is provided at the bottom of the working chamber 2, and a drain pipe 4 is installed at the bottom of the drain tank 2 a. By the design, accumulated water at the bottom of the working chamber 2 in the working process can be better avoided.

Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a low atmospheric pressure damp and hot test box overflow system, includes test box body (1), test box body (1) upper portion is equipped with studio (2), and the lower part is equipped with storage water tank (3), its characterized in that: a drain pipe (4) and a first air pressure balance pipe (5) are connected between the working chamber (2) and the water storage tank (3), wherein the drain pipe (4) is connected to the bottom of the working chamber (2), a first electromagnetic valve (6) is arranged on the drain pipe (4), and a second electromagnetic valve (7) is arranged on the first air pressure balance pipe (5); the water storage tank (3) is connected with an overflow pipe (8) and a second air pressure balance pipe (9), wherein a third electromagnetic valve (10) is arranged on the overflow pipe (8), a fourth electromagnetic valve (11) is arranged on the second air pressure balance pipe (9), and the far end of the second air pressure balance pipe (9) is communicated with the atmosphere; the water level monitoring assembly is arranged in the water storage tank (3).

2. The low pressure, wet and hot test chamber overflow system of claim 1, wherein: the water level monitoring assembly comprises an upper water level floating ball (12 a) and a lower water level floating ball (12 b) which are positioned in the height direction of the water storage tank (3).

3. The low pressure, wet and hot test chamber overflow system of claim 1, wherein: the overflow pipe (8) is connected to the lower part of the water storage tank (3).

4. The low pressure, wet and hot test chamber overflow system of claim 1, wherein: the first air pressure balance pipe (5) is provided with a pressure sensor (13).

5. The low pressure, wet and hot test chamber overflow system of claim 1, wherein: a detection interface (14) is reserved on the first air pressure balance pipe (5).

6. The low pressure, wet and hot test chamber overflow system of claim 1, wherein: the bottom of the working chamber (2) is provided with a drainage groove (2 a), and the drainage pipe (4) is arranged at the bottom of the drainage groove (2 a).

7. The low pressure, wet and hot test chamber overflow system of claim 1, wherein: the test box is characterized in that the test box body (1) is provided with a humidifier (15), a moisture inlet pipe (16) is arranged on the side wall of the working chamber (2), the lower half part of the inner end part of the moisture inlet pipe (16) is of a closed structure, and a humidifying pipeline (17) is connected between the humidifier (15) and the outer end of the moisture inlet pipe (16).

8. The low pressure, wet and hot test chamber overflow system of claim 7, wherein: the upper half of the inner end of the moisture inlet pipe (16) is of an inclined structure.