Negative pressure equipment drainage device and negative pressure test device

Abstract

The invention provides a drainage device for negative pressure equipment, which is used for draining accumulated water in the negative pressure equipment and comprises a water storage tank connected with the negative pressure equipment, a high-pressure air source connected with the water storage tank and a one-way valve connected with the water storage tank, the one-way valve prevents external air or liquid from entering the water storage tank, and the drainage device of the negative pressure equipment has a conventional state for collecting accumulated water in the negative pressure equipment and a drainage state for draining water in the water storage tank. According to the negative pressure equipment drainage device and the negative pressure test device, the water storage tank is arranged, so that the air pressure of the negative pressure equipment drainage device is different in the normal state and the drainage state, the drainage effect in the negative pressure equipment is achieved, the air pressure in the negative pressure equipment and normal use of the negative pressure equipment cannot be affected, the structure is simple, reliability is high, and practicability is high. And automatic drainage can be realized.

Description

Technical Field

[0001] The present invention relates to the field of testing equipment, and in particular to a negative pressure equipment drainage device and a negative pressure testing device. Background Art

[0002] A comprehensive test system combines an electrodynamic shaker with a temperature and humidity test chamber, and its applications are widespread. When performing humidity tests, a large amount of water often accumulates on the shaker. Installing a drain port can reduce this amount of water and prevent damage to the shaker.

[0003] The negative pressure comprehensive test system adds a low pressure function on the basis of temperature, humidity and vibration. When the test chamber is in a low pressure state, the air pressure outside the chamber is higher than the air pressure inside the chamber, and the drain port cannot realize the drainage function. Therefore, an automatic drainage device is required to realize the drainage function of the vibration table in the negative pressure comprehensive test system.

[0004] If negative pressure suction or pressurized drainage is used to deal with the accumulated water at the drain outlet, it is possible to change the air pressure in the electric vibration table and affect the test.

[0005] In view of this, it is necessary to improve the existing device to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a drainage device for negative pressure equipment to solve the problem that accumulated water in existing negative pressure equipment is difficult to drain.

[0007] To achieve the above-mentioned objectives, the present invention provides a negative pressure equipment drainage device for draining accumulated water in the negative pressure equipment, the negative pressure equipment drainage device comprising a water storage tank connected to the negative pressure equipment, a high-pressure air source for connecting to the water storage tank, and a one-way valve for connecting to the water storage tank, the one-way valve preventing external air or liquid from entering the water storage tank, the negative pressure equipment drainage device having a normal state for collecting accumulated water in the negative pressure equipment and a drainage state for draining water in the water storage tank, when the negative pressure equipment drainage device is in the normal state, the water storage tank is connected to the negative pressure equipment, the air pressure in the water storage tank is the same as the air pressure in the negative pressure equipment, and the water in the negative pressure equipment falls into the water storage tank under the action of gravity; when the negative pressure equipment drainage device is in the drainage state, the water storage tank is connected to the high-pressure air source, and the air supplied by the high-pressure air source increases the air pressure in the water storage tank to discharge the liquid.

[0008] As a further improvement of the present invention, the negative pressure equipment has a drain outlet, the water storage tank is provided with a first interface located above and a second interface located below, the negative pressure equipment is provided with a drain outlet, and the second interface is located below the drain outlet.

[0009] As a further improvement of the present invention, when the negative pressure equipment drainage device is in a normal state, the first interface is connected to the one-way valve, and the second interface is connected to the drain port; when the negative pressure equipment drainage device is in a drainage state, the first interface is connected to the high-pressure gas source, and the second interface is connected to the one-way valve.

[0010] As a further improvement of the present invention, the negative pressure equipment drainage device also includes a two-position five-way solenoid valve, which has a connection port No. 1, a connection port No. 2, a connection port No. 3, a connection port No. 4 and a connection port No. 5. When the negative pressure equipment drainage device is in a normal state, the No. 1 connection port is connected to the first interface, the No. 2 connection port is connected to the second interface, the No. 4 connection port is connected to the one-way valve, the No. 5 connection port is connected to the drain port, the No. 1 connection port is connected to the No. 4 connection port, and the No. 2 connection port is connected to the No. 5 connection port; when the negative pressure equipment drainage device is in a drainage state, the No. 1 connection port is connected to the second interface, the No. 2 connection port is connected to the first interface, the No. 3 connection port is connected to the high-pressure gas source, the No. 4 connection port is connected to the one-way valve, the No. 1 connection port is connected to the No. 3 connection port, and the No. 2 connection port is connected to the No. 4 connection port.

[0011] As a further improvement of the present invention, the negative pressure equipment drainage device includes a control valve for switching between a normal state and a drainage state.

[0012] As a further improvement of the present invention, the control valve is a float switch arranged in the water storage tank.

[0013] As a further improvement of the present invention, a liquid level gauge is provided on the water storage tank, and the liquid level gauge is electrically connected to the control valve.

[0014] As a further improvement of the present invention, the negative pressure equipment drainage device also includes a mounting member arranged on the water storage tank.

[0015] The present invention also provides a negative pressure test device, which includes a test box, a vacuum pump for forming negative pressure in the test box, and the negative pressure equipment drainage device as described above.

[0016] As a further improvement of the present invention, the height of the negative pressure equipment drainage device is lower than the test box.

[0017] The beneficial effects of the present invention are as follows: the negative pressure equipment drainage device and negative pressure testing device of the present invention, by setting a water storage tank, make the air pressure of the negative pressure equipment drainage device different in the normal state and the drainage state, thereby achieving the effect of draining water inside the negative pressure equipment, and will not affect the air pressure inside the negative pressure equipment and its normal use. It has a simple structure, high reliability, and can achieve automatic drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the negative pressure equipment drainage device of the present invention;

[0020] Figure 2 2 is a schematic structural diagram of a negative pressure equipment drainage device of a negative pressure test device of the present invention in a normal state;

[0021] Figure 3 It is a structural schematic diagram of the negative pressure equipment drainage device of the negative pressure test device of the present invention in the drainage state. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figures 1 to 3 As shown, the negative pressure test device of the present invention includes a test box 2, a vacuum pump 3 for forming negative pressure in the test box 2, and a negative pressure equipment drainage device 1.

[0026] The negative pressure device has a drain outlet, which is located at the bottom of the test box 2. The accumulated water generated by the test box 2 is collected at the drain outlet.

[0027] The negative pressure equipment drainage device 1 is lower than the test chamber 2. The negative pressure equipment drainage device 1 is used to drain accumulated water within the negative pressure equipment. The negative pressure equipment of this embodiment is a negative pressure test device, but the use scenario of the negative pressure equipment drainage device 1 is not limited to negative pressure test devices. It can be used in any situation where wastewater needs to be discharged while working under negative pressure.

[0028] The negative pressure equipment drainage device 1 includes a water tank 11 connected to the negative pressure equipment, a high-pressure gas source 12 connected to the water tank 11, a one-way valve 13 connected to the water tank 11, a two-position five-way solenoid valve 14, a control valve 15, and a mounting part 16 arranged on the water tank 11.

[0029] The mounting member 16 can fix the water tank 11 on the test box 2 or other fixed objects. In this embodiment, the mounting member 16 extends outward from one side of the water tank 11 and forms a receiving space after being fixed. The two-position five-way solenoid valve 14 is received in the receiving space.

[0030] The water storage tank 11 is used to collect and drain the accumulated water in the test box 2. In this embodiment, the water storage tank 11 can be connected to the drain port.

[0031] The water tank 11 is provided with a first interface 111 located at the top and a second interface 112 located at the bottom. The negative pressure device is provided with a drain outlet. In order to realize the gravity drainage function, at least the second interface 112 needs to be packaged below the drain outlet. Of course, setting the entire water tank 11 below the drain outlet can ensure that the water tank 11 can collect accumulated water as much as possible under the action of gravity.

[0032] The one-way valve 13 prevents external air or liquid from entering the water storage tank 11 .

[0033] The high-pressure gas source 12 is used to increase the gas pressure in the water tank 11 , thereby draining the water in the water tank 11 , thereby preventing the water from being unable to be drained due to negative pressure in the water tank 11 .

[0034] The two-position five-way solenoid valve 14 is used to connect the test box 2 , the water storage tank 11 , the high-pressure gas source 12 and the one-way valve 13 .

[0035] The negative pressure equipment drainage device 1 has a normal state for collecting accumulated water in the negative pressure equipment and a drainage state for draining the water in the water tank 11. When the negative pressure equipment drainage device 1 is in the normal state, the water tank 11 is connected to the negative pressure equipment, and the air pressure in the water tank 11 is the same as the air pressure in the negative pressure equipment. The water in the negative pressure equipment falls into the water tank 11 under the action of gravity; when the negative pressure equipment drainage device 1 is in the drainage state, the water tank 11 is connected to the high-pressure air source 12, and the high-pressure air source 12 supplies air to increase the air pressure in the water tank 11 to drain the liquid.

[0036] In this embodiment, the connection methods of the first interface 111 and the second interface 112 are different in the two states. When the negative pressure equipment drainage device 1 is in the normal state, the first interface 111 is connected to the one-way valve 13, and the second interface 112 is connected to the drain port. When the negative pressure equipment drainage device 1 is in the drainage state, the first interface 111 is connected to the high-pressure gas source 12, and the second interface 112 is connected to the one-way valve 13.

[0037] The two-position five-way solenoid valve 14 has a first connection port 141 , a second connection port 142 , a third connection port 143 , a fourth connection port 144 and a fifth connection port 145 .

[0038] When the negative pressure equipment drainage device 1 is in a normal state, the No. 1 connection port 141 is connected to the first interface 111, the No. 2 connection port 142 is connected to the second interface 112, the No. 4 connection port 144 is connected to the one-way valve 13, and the No. 5 connection port 145 is connected to the drain port. The No. 1 connection port 141 is connected to the No. 4 connection port 144, and the No. 2 connection port 142 is connected to the No. 5 connection port 145.

[0039] Under normal conditions, the first interface 111, the No. 1 connection port 141, the No. 4 connection port 144, and the one-way valve 13 are connected in sequence, and the drain port, the No. 5 connection port 145, the No. 2 connection port 142 and the second interface 112 are connected in sequence, and the test box 2 achieves the effect of connecting the test box 2 with the water tank 11. The air pressure in the test box 2 and the water tank 11 is consistent, and the accumulated water at the drain port falls into the water tank 11 under the action of gravity. The one-way valve 13 prevents outside air from entering the water tank 11 and causing the pressure in the water tank 11 to increase.

[0040] When the negative pressure equipment drainage device 1 is in the drainage state, the No. 1 connection port 141 is connected to the second interface 112, the No. 2 connection port 142 is connected to the first interface 111, the No. 3 connection port 143 is connected to the high-pressure gas source 12, the No. 4 connection port 144 is connected to the one-way valve 13, the No. 1 connection port 141 and the No. 3 connection port 143 are connected, and the No. 2 connection port 142 and the No. 4 connection port 144 are connected.

[0041] In the drainage state, the high-pressure gas source 12, the third connection port 143, the first connection port 141, and the first interface 111 are sequentially connected. The high-pressure gas source 12 pressurizes the water storage tank 11. The second interface 112, the second connection port 142, the fourth connection port 144, and the one-way valve 13 are sequentially connected. The water in the water storage tank 11 is discharged from the one-way valve 13 under high pressure. In the high-pressure state, the water storage tank 11 has high drainage efficiency. After rapid drainage, it can quickly return to the normal state to avoid water accumulation in the test chamber 2.

[0042] In this embodiment, the switching between the normal state and the drainage state of the negative pressure equipment drainage device 1 can be achieved by setting a two-position five-way solenoid valve 14. It has a simple structure and high reliability, can realize automatic drainage, and avoid the pipeline connection abnormalities that are easy to occur in the connection of multiple valves and multiple pipelines.

[0043] The control valve 15 is used to switch between the normal state and the drainage state. In this embodiment, the control valve 15 is a float switch arranged in the water storage tank 11.

[0044] The water tank 11 is provided with a liquid level gauge, which can be designed to be electrically connected to the control valve 15 or simply be used by a user to observe the liquid level. In this embodiment, the liquid level in the water tank 11 can be observed by the liquid level gauge, allowing the user to detect and promptly intervene in the event of abnormal drainage of the negative pressure equipment drainage device 1.

[0045] When the liquid level in the water tank 11 is too high, the control valve 15 can be used to control the switching of the two-position five-way solenoid valve 14, thereby draining the water tank 11. When the liquid level in the water tank 11 is low, the control valve 15 can be used to control the switching of the two-position five-way solenoid valve 14, thereby draining the water tank 11. The control valve 15 is a float switch that automatically switches the two-position five-way solenoid valve 14 when the liquid level reaches a set height.

[0046] The negative pressure equipment drainage device 1 and the negative pressure testing device of the present invention are provided with a water storage tank 11, so that the air pressure of the negative pressure equipment drainage device 1 is different in the normal state and the drainage state, thereby achieving the effect of draining water inside the negative pressure equipment without affecting the air pressure inside the negative pressure equipment and its normal use. It has a simple structure, high reliability, and can achieve automatic drainage.

[0047] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A negative pressure equipment drainage device for draining the accumulated water in the negative pressure equipment, characterized by: The negative pressure equipment drainage device includes a water storage tank connected to the negative pressure equipment, a high-pressure air source connected to the water storage tank, and a one-way valve connected to the water storage tank. The one-way valve prevents external air or liquid from entering the water storage tank. The negative pressure equipment drainage device has a normal state for collecting accumulated water in the negative pressure equipment and a drainage state for draining the water in the water storage tank. When the negative pressure equipment drainage device is in the normal state, the water storage tank is connected to the negative pressure equipment, and the air pressure in the water storage tank is the same as the air pressure in the negative pressure equipment. The water in the negative pressure equipment falls into the water storage tank under the action of gravity; when the negative pressure equipment drainage device is in the drainage state, the water storage tank is connected to the high-pressure air source, and the air supplied by the high-pressure air source increases the air pressure in the water storage tank to discharge the liquid.

2. The negative pressure equipment drainage device according to claim 1, characterized in that: The negative pressure device has a drain outlet, the water storage tank is provided with a first interface located at the top and a second interface located at the bottom, the negative pressure device is provided with a drain outlet, and the second interface is located below the drain outlet.

3. The negative pressure equipment drainage device according to claim 2, characterized in that: When the negative pressure equipment drainage device is in a normal state, the first interface is connected to the one-way valve, and the second interface is connected to the drain port. When the negative pressure equipment drainage device is in a drainage state, the first interface is connected to the high-pressure gas source, and the second interface is connected to the one-way valve.

4. The negative pressure equipment drainage device according to claim 3, characterized in that: The negative pressure equipment drainage device also includes a two-position five-way solenoid valve, which has a connection port No. 1, a connection port No. 2, a connection port No. 3, a connection port No. 4 and a connection port No.

5. When the negative pressure equipment drainage device is in a normal state, the No. 1 connection port is connected to the first interface, the No. 2 connection port is connected to the second interface, the No. 4 connection port is connected to the one-way valve, the No. 5 connection port is connected to the drainage port, the No. 1 connection port is connected to the No. 4 connection port, and the No. 2 connection port is connected to the No. 5 connection port; when the negative pressure equipment drainage device is in a drainage state, the No. 1 connection port is connected to the second interface, the No. 2 connection port is connected to the first interface, the No. 3 connection port is connected to the high-pressure gas source, the No. 4 connection port is connected to the one-way valve, the No. 1 connection port is connected to the No. 3 connection port, and the No. 2 connection port is connected to the No. 4 connection port.

5. The negative pressure equipment drainage device according to claim 4, characterized in that: The negative pressure equipment drainage device includes a control valve for switching between a normal state and a drainage state.

6. The negative pressure equipment drainage device according to claim 5, characterized in that: The control valve is a float switch arranged in the water storage tank.

7. The negative pressure equipment drainage device according to claim 5, characterized in that: The water storage tank is provided with a liquid level gauge, which is electrically connected to the control valve.

8. The negative pressure equipment drainage device according to claim 1, characterized in that: The negative pressure equipment drainage device also includes a mounting member arranged on the water storage tank.

9. A negative pressure test device, characterized in that: The negative pressure test device includes a test box, a vacuum pump for forming negative pressure in the test box, and a negative pressure equipment drainage device according to any one of claims 1 to 8.

10. The negative pressure test device according to claim 9, characterized in that: The height of the negative pressure equipment drainage device is lower than the test box.

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