Negative pressure drainage buffer device

Abstract

The utility model discloses a negative-pressure drainage buffering device which comprises a buffering device, a negative-pressure drainage device and a negative-pressure drainage device. The exhaust pipe is arranged on the side wall of the buffer device in a communicating manner and is provided with an exhaust electromagnetic valve; the upper part of the feed liquid tank is in pipeline connection with the buffer device through a breather pipe, the lower part of the feed liquid tank is in pipeline connection with the buffer device through a liquid inlet pipe, an air communication electromagnetic valve is arranged on the breather pipe, a feed liquid communication electromagnetic valve is arranged on the liquid inlet pipe, and the feed liquid tank is communicated with a feed liquid tank vacuum device; the drainage pipe is arranged at the bottom end of the side face of the buffering device in a communicating mode and provided with a drainage electromagnetic valve, the buffering device is connected with a drainage pump through a drainage pipe pipeline, and the drainage pipe and the liquid inlet pipe are symmetrically installed relative to the buffering device. According to the negative pressure drainage buffer device, the problem that a vacuum area is formed by an existing drainage pump influenced by negative pressure, so that a seal is damaged due to lack of lubrication is solved.

Description

Technical Field

[0001] The utility model relates to the field of drainage equipment, in particular to a negative pressure drainage buffer device. Background Art

[0002] The core principle of negative pressure drainage is to use negative pressure to drain water from a low location to a higher location. In a drainage system, a negative pressure pump or valve is installed to reduce the pressure within the pipe to a level below atmospheric pressure, creating a negative pressure zone. When the water level in the drainage pipe rises above the negative pressure zone, the water is drawn into the negative pressure zone and then transported to the higher drainage pipe.

[0003] In the actual production process of enterprises, system drainage under negative pressure is a major problem and pain point, such as Figure 4 As shown, the existing negative pressure drainage system is composed of a liquid tank body, a condenser, a liquid tank vacuum device, a drainage pipe and a drainage pump. In the negative pressure system, due to the negative pressure in the system, there will be a pressure difference between the drainage pump and the system negative pressure, resulting in poor drainage of the system, thereby affecting the normal operation of the system. At the same time, the drainage pump affected by the negative pressure will form a vacuum area, resulting in the lack of lubrication and damage of the seal. Utility Model Content

[0004] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described hereinafter.

[0005] In order to achieve these purposes and other advantages according to the present invention, a negative pressure drainage buffer device is provided, comprising:

[0006] A buffer device, a buffer device liquid level gauge is provided on the top of the buffer device;

[0007] an exhaust pipe, which is connected to the side wall of the buffer device and is equipped with an exhaust solenoid valve;

[0008] A liquid tank, the upper part of which is connected to the buffer device pipeline through a vent pipe, and the lower part is connected to the buffer device pipeline through a liquid inlet pipe, the vent pipe is provided with an air communication solenoid valve, the liquid inlet pipe is provided with a liquid communication solenoid valve, and the liquid tank is connected to a liquid tank vacuum device;

[0009] A drain pipe is connected to the bottom end of the side of the buffer device and is installed with a drain solenoid valve. The buffer device is connected to the drain pump through the drain pipe. The drain pipe and the liquid inlet pipe are symmetrically installed about the buffer device.

[0010] Preferably, the structure of the liquid tank includes:

[0011] The liquid tank body has a liquid tank level gauge installed on the top;

[0012] A condenser is connected to the side of the liquid tank;

[0013] The liquid tank vacuum device is connected and arranged on the tank body of the liquid tank.

[0014] The utility model has at least the following beneficial effects:

[0015] The utility model provides a negative pressure drainage buffer device, which increases the pressure in the pipeline to the level of normal atmospheric pressure by arranging a material-liquid connecting solenoid valve, a drainage solenoid valve, an exhaust solenoid valve, an air connecting solenoid valve, and controlling a material-liquid tank level gauge and a buffer device level gauge. When the drainage pump is started, the entire system is at a normal level, and the normal operation of the negative pressure system is not affected, thereby avoiding the formation of a vacuum area in the drainage pump affected by the negative pressure, resulting in lack of lubrication and damage to the seal.

[0016] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a structural diagram of the liquid tank of the utility model;

[0019] Figure 3 This is a schematic structural diagram of the buffer device of the present utility model;

[0020] Figure 4 It is a schematic diagram of the overall structure of the existing negative pressure drainage device. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that in the description of this utility model, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings. These are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" 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, unless otherwise clearly specified and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" 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 an indirect connection through an intermediate medium. It can be a communication between the internal parts of 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.

[0025] In addition, in the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] The following is a detailed description of this experimental model with reference to the accompanying drawings:

[0027] Figure 1-3 The present invention shows a negative pressure drainage buffer device, comprising:

[0028] The buffer device 1 has a buffer device level gauge 11 provided on its top;

[0029] An exhaust pipe 2 is connected to the side wall of the buffer device 1 and is equipped with an exhaust solenoid valve 20;

[0030] The liquid tank 3 is connected to the buffer device 1 through a vent pipe 4 at the top and a liquid inlet pipe 5 at the bottom. An air communication solenoid valve 40 is provided on the vent pipe 4, and a liquid communication solenoid valve 50 is provided on the liquid inlet pipe 5. The liquid tank is connected to a liquid tank vacuum device 33.

[0031] The drain pipe 6 is connected to the bottom end of the side of the buffer device 1 and is installed with a drain solenoid valve 60. The buffer device 1 is connected to the drain pump 7 through the drain pipe 6. The drain pipe 6 and the liquid inlet pipe 5 are symmetrically installed about the buffer device 1.

[0032] Working principle:

[0033] The utility model aims to solve the existing problem that due to the influence of negative pressure, a vacuum area is formed in the drainage pump, resulting in lack of lubrication and damage to the seal. The specific solution is as follows:

[0034] The utility model discloses a negative pressure drainage buffer device, which is provided with a buffer device 1 between a liquid tank 3 and a drainage pump 7. The buffer device 1 is designed to have a bottom inlet and a bottom outlet, so that the liquid entering the buffer device 1 through a liquid inlet pipe 5 at the bottom of the buffer device 1 flows out through a drainage pipe 6 below the buffer device 1.

[0035] The liquid tank vacuum device 33 is turned on to start extracting the air in the liquid tank 3 filled with liquid. Then, the air pressure in the liquid tank 3 and the buffer device 1 is lower than the atmospheric pressure through the opened air communication solenoid valve 40, and the liquid storage operation is started.

[0036] When the liquid is continuously transported through the liquid inlet pipe 5 on the liquid tank 3 in the buffer device 1, the liquid solenoid valve 50 and the air communication solenoid valve 40 are in the open state, the drainage solenoid valve 60 and the exhaust solenoid valve 20 are in the closed state, and the drainage pump 7 is stopped, thereby realizing negative pressure water storage;

[0037] When the liquid level of the buffer device 1 reaches the upper limit value set by the buffer device liquid level gauge 11, the liquid communication solenoid valve 50 and the air communication solenoid valve 40 are closed at the same time, and the exhaust solenoid valve 20 is opened at this time, and the slight negative pressure state generated in the buffer device 1 by the liquid tank vacuum device 33 is released through the exhaust pipe 2, so that the buffer device 1 is in a normal pressure state;

[0038] Open the drain solenoid valve 60 and start the drain pump 7. First, open the exhaust solenoid valve 20 to prevent the drain pump 7 from being affected by negative pressure and forming a vacuum area, which may cause the seal to lack lubrication and thus be damaged. Finally, the liquid leaves the buffer device 1 through the drain pipe 6. At this time, there is no pressure difference between the drain pump 7 and the buffer device 1, thereby achieving smooth drainage operation under normal pressure.

[0039] When the liquid level of the buffer device 1 reaches the lower limit value set by the buffer device level gauge 11, the drain pump 7 is turned off, and the drain solenoid valve 60 and the exhaust solenoid valve 20 are closed at the same time. At this time, since the air pressure in the buffer device 1 is normal, and the liquid tank 3 is in a slightly negative pressure state due to the operation of the liquid tank vacuum device 33, the air connection solenoid valve 40 is opened first, so that the liquid tank 3 and the buffer device 1 are both in a slightly negative pressure state (to avoid the liquid backflow phenomenon caused by the pressure difference), and then the liquid connection solenoid valve 50 is opened to start the operation, so that the negative pressure state in the buffer device 1 is restored, and new liquid is transported from the liquid tank 3 to the buffer device 1 through the liquid inlet pipe 5, starting a new round of negative pressure water storage operation cycle, ensuring the stable operation of the system.

[0040] As in the above solution, the structure of the liquid tank 3 includes:

[0041] The liquid tank body 30 has a liquid tank level gauge 31 installed on its top;

[0042] A condenser 32 is connected to the side of the liquid tank body 30;

[0043] The liquid tank vacuum device 33 is connected and arranged on the liquid tank body 30 .

[0044] Working principle:

[0045] The feed liquid (high-temperature and high-pressure refrigerant) enters the feed liquid tank body 30, and is condensed and refluxed by the atomized water through the condenser 32. The feed liquid tank vacuum device 33 is turned on, so that the feed liquid tank body 30 and the buffer device 1 connected by the air communication solenoid valve 40 are both in a slightly negative pressure state, thereby realizing negative pressure water storage. Finally, the feed liquid is transported to the buffer device 1 through the feed pipe 5 to start the next operation.

[0046] The liquid stored in the liquid tank body 30 is continuously transported to the buffer device 1 through the liquid inlet pipe 5 provided at the bottom. At this time, the condenser 32 is provided to liquefy or condense the discharged high-temperature, high-pressure refrigerant vapor in the condenser 32 and dissipate the heat into the air, thereby condensing it into high-pressure refrigerant liquid.

[0047] The liquid tank vacuum device 33 connected thereto can ensure that the liquid tank body 30 maintains a slightly negative pressure state, thereby accelerating the liquid delivery operation. At the same time, the liquid tank level gauge 31 provided thereon can monitor the liquid level in the liquid tank 3 when the liquid tank 3 is disconnected from the buffer device 1.

[0048] Among them, the buffer device level meter 11 and the liquid tank level meter 31 in the utility model both use radar level meters, mainly because: the radar level meter has high measurement accuracy, good stability, and is not affected by external factors such as temperature, pressure, and medium changes; it has high reliability and does not require direct contact with the liquid, so it is not easily affected by factors such as changes in liquid properties and corrosion; it has strong adaptability and a longer service life.

[0049] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A negative pressure drainage buffer device, characterized in that: include: A buffer device, a buffer device liquid level gauge is provided on the top of the buffer device; an exhaust pipe, which is connected to the side wall of the buffer device and is equipped with an exhaust solenoid valve; A liquid tank, the upper part of which is connected to the buffer device pipeline through a vent pipe, and the lower part is connected to the buffer device pipeline through a liquid inlet pipe, the vent pipe is provided with an air communication solenoid valve, the liquid inlet pipe is provided with a liquid communication solenoid valve, and the liquid tank is connected to a liquid tank vacuum device; A drain pipe is connected to the bottom end of the side of the buffer device and is installed with a drain solenoid valve. The buffer device is connected to the drain pump through the drain pipe. The drain pipe and the liquid inlet pipe are symmetrically installed about the buffer device.

2. The negative pressure drainage buffer device according to claim 1, characterized in that: The structure of the liquid tank includes: The liquid tank body has a liquid tank level gauge installed on the top; A condenser is connected to the side of the liquid tank; The liquid tank vacuum device is connected and arranged on the tank body of the liquid tank.

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