Vacuum well valve breathing device and flood-proof system

Abstract

The vacuum well valve breathing device comprises an upper cover and a shell which are assembled in a matched mode, a floating ball is arranged in the shell, a water inlet is formed in the bottom of the shell, the upper cover is provided with a gas channel, and the floating ball moves upwards under the buoyancy of liquid to block the gas channel so that gas can not flow. The breathing device is arranged and used for being connected with the vacuum valve and the air normally-open connector of the controller, when the liquid level in the vacuum well rises abnormally, it can be guaranteed that the vacuum drainage system does not break down due to water inflow of equipment, losses are avoided, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum wells, in particular to a vacuum well valve breathing device and a vacuum well flood prevention system. Background Art

[0002] Traditional sewage collection methods mostly use gravity to transport sewage to sewage treatment plants through pipes for centralized treatment. Although this method has the advantages of simple structure, no power consumption, and mature system design, it also has many limitations: it requires a large burial depth, thick pipes, large excavation volume, and is greatly affected by terrain. It is not suitable for areas with low population density, flat terrain, and complex geological conditions. The emergence of vacuum sewage collection and treatment systems has greatly solved the above problems. The vacuum sewage well is the main device of the vacuum sewage collection and treatment system. It is mainly used for temporary collection of sewage. When the liquid level in the well reaches a certain height, the vacuum valve is opened to pump water into the main pipeline and transport it to the pump station for centralized treatment.

[0003] In the prior art, drainage pipes, vacuum valves, controllers, liquid level detectors, etc. are generally installed in the vacuum well. Once the liquid level in the vacuum well is higher than the set value, the controller starts and controls the vacuum valve to open and pump water. When the liquid level is lower than the set value, the controller controls the vacuum valve to close and stops pumping water. When the vacuum station loses pressure (the vacuum station is damaged or the vacuum transmission pipeline is damaged, or the vacuum station loses pressure due to other reasons), the controller does not open, the vacuum valve does not open, or when there is a heavy rainstorm or a large amount of domestic drainage, the vacuum valve does not have time to drain the water, and the sewage in the vacuum well will gradually rise and submerge the vacuum valve, controller and other equipment in the vacuum well. Since the vacuum valve and controller are both pure mechanical devices driven by gas, when the liquid level rises, the sewage will enter the equipment from the air normally open interface of the vacuum valve and controller, causing damage to the equipment, thereby paralyzing the entire vacuum sewage treatment system and causing losses. In response to this, some technicians designed a sealed box and placed it in the vacuum well, and then placed the controller, vacuum valve and other pneumatic equipment in the sealed box to prevent water from entering the equipment; some technicians set up another space outside the vacuum well and moved the controller and vacuum valve out of the vacuum well. Both of the above methods will increase the cost of sewage treatment and have high installation requirements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vacuum well valve breathing device and a vacuum well flood prevention system, which solves the problem that the abnormal rise of the vacuum well liquid level causes water ingress to the equipment and paralysis of the drainage system, and reduces the sewage treatment cost and installation requirements.

[0005] The technical solution adopted by the present utility model to solve its technical problems is as follows: A vacuum well valve breathing device and a vacuum well flood prevention system, which are connected to the normally open air interface of the valve. It is characterized in that it includes a matching upper cover and a housing. A floating ball is arranged inside the housing and a water inlet is arranged at the bottom. The upper cover is provided with a gas passage. When liquid enters the housing, the floating ball moves upward under the buoyancy of the liquid to block the gas passage so that the gas does not flow.

[0006] Further, the gas passage includes a breathing port, a balance air port, and a valve port arranged between the breathing port and the balance air port. The floating ball moves upward under the buoyancy of the liquid to block the valve port so that the gas between the breathing port and the balance air port does not flow.

[0007] Further, the breathing port is arranged in the middle and at the upper end of the upper cover, the balance air port is arranged on the upper cover and is arranged on the outer periphery of the breathing port, and the position of the breathing port is higher than the position of the balance air port; the balance air port communicates the external air with the inner cavity of the housing.

[0008] Further, the valve port is arranged on the upper cover and is arranged at the connection between the upper cover and the housing.

[0009] Further, the balance air port includes a plurality of air holes evenly arranged around the breathing port.

[0010] Further, the middle part of the upper cover has a cavity, the cavity is arranged between the breathing port and the valve port, and the valve port communicates the cavity with the inner cavity of the housing.

[0011] Further, the balance air port is an annular hole arranged on the outer periphery of the breathing port.

[0012] The present utility model also provides a vacuum well flood prevention system, which is applied in a vacuum well and includes the above-mentioned breathing device, a vacuum valve, a controller, and a drainage pipeline. The vacuum valve is arranged on the drainage pipeline to control the on-off of the drainage pipeline. The controller is connected to the vacuum valve to control the opening and closing of the vacuum valve. The normally open air interfaces of the vacuum valve and the controller are both connected to the breathing port of the breathing device.

[0013] Further, a liquid level detector is also arranged in the vacuum well, and the liquid level detector is connected to the controller to enable the controller to start or close at a set threshold.

[0014] Further, the water inlet end of the drainage pipeline is arranged in the vacuum well, and the water outlet end is connected to an external vacuum pipeline.

[0015] The beneficial effects of the present utility model are:

[0016] (1) The breathing device of the utility model has a breathing port and a valve port on the upper cover, and a float is provided in the shell. When water flows into the shell from the bottom of the shell, the float moves upward due to the buoyancy of the liquid to block the valve port so that air cannot flow between the breathing port and the downstream vacuum valve and controller. The breathing device is controlled by the buoyancy of the liquid to protect the downstream vacuum valve and controller from water ingress.

[0017] (2) The utility model provides a breathing device which is connected to the normally open air interface of the vacuum valve and the controller. When the liquid level in the vacuum well rises abnormally, the air between the vacuum valve and the controller is cut off to prevent air circulation, thereby ensuring the normal operation of the vacuum drainage system and preventing it from being paralyzed by water ingress, thereby avoiding losses. Compared with the prior art, there is no need to set up a separate space to move out the equipment, nor is there a need for a sealing box with high sealing requirements. The entire vacuum well drainage system is simple to build, has a good anti-flooding effect, and is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the utility model is shown in FIG. Figure 1 (The float does not float up, and the valve port is open);

[0019] Figure 2 The structure of the utility model is shown in FIG. Figure 2 (The float rises, and the valve port is blocked and not conducting);

[0020] Figure 3 It is a structural schematic diagram of the vacuum well flood prevention system of the utility model.

[0021] In the figure:

[0022] Breathing device 1, upper cover 11, shell 12, float 13, breathing port 14, balance air port 15, valve port 16, water inlet 17, cavity 18, vacuum valve 2, air normally open interface 21 of vacuum valve, controller 3, air normally open interface 31 of controller, drainage pipe 4, water inlet end 41 and water outlet end 42 of drainage pipe, liquid level detector 5, vacuum well 6. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] like Figure 1 - Figure 2A vacuum well valve breathing device 1 as shown, which is connected to the normally open air interface of the valve, includes an upper cover 11 and a housing 12 that are assembled together. The upper cover and the housing can be fixedly connected or detachably connected. In this embodiment, the preferred connection is detachable, such as a threaded connection. A floating ball 13 is provided inside the housing and a water inlet 17 is provided at the bottom. The upper cover is provided with a gas passage. When water flows into the housing from the water inlet at the bottom of the housing, the floating ball moves upward under the buoyancy of the liquid to block the gas passage so that the gas does not flow.

[0026] Currently, valves in vacuum wells (such as vacuum valves, controllers, etc.) are all driven by pure mechanical means. Such valves require air for switching when opening and closing. That is to say, during the opening and closing process of the valve, air will be inhaled or exhausted. Therefore, the breathing in this embodiment can be understood as the action of the valve inhaling and exhausting air.

[0027] The gas passage includes a breathing port 14 for connecting to the normally open air interface of the valve, a balance air port 15, and a valve port 16 provided between the breathing port and the balance air port. When there is no water in the housing, the floating ball falls to the bottom of the housing, and gas flow is formed between the breathing port, the valve port, the balance air port, and the outside of the housing. When the liquid level in the vacuum well rises and causes water to enter the interior of the housing of the breathing device, the floating ball moves upward under the buoyancy of the liquid to block the valve port, and gas flow cannot be formed between the breathing port, the valve port, the balance air port, and the outside of the housing.

[0028] In this embodiment, preferably, the breathing port 14 is provided at the upper part and the middle of the upper cover, the balance air port 15 is provided on the upper cover and is provided on the outer periphery of the breathing port, and the position of the breathing port is higher than the position of the balance air port; the balance air port communicates the outside air with the inner cavity of the housing.

[0029] In this embodiment, the valve port is provided on the upper cover and is provided at the connection between the upper cover and the housing.

[0030] In this embodiment, the balance air port includes a number of air holes evenly arranged around the breathing port. The air holes are preferably circular holes, and can also be waist-shaped holes, but are not limited to this; it can be understood that it can also be an annular hole provided on the outer periphery of the breathing port.

[0031] In this embodiment, preferably, the cross-section of the housing is designed as a circle, and the upper cover is also designed as a circle matching the housing. Of course, the upper cover and the housing can also be designed as a cuboid shape, etc.

[0032] In this embodiment, the middle part of the upper cover has a cavity 18. The upper end of the cavity communicates with the breathing port 14, and the lower end communicates with the valve port 16. The valve port communicates the cavity of the upper cover with the inner cavity of the housing; the balance air port communicates the outside air with the inner cavity of the housing.

[0033] Embodiment 2:

[0034] Such as Figure 3A vacuum well flood prevention system is shown, which is applied in the vacuum well 6 and includes the breathing device 1, vacuum valve 2, controller 3 and drainage pipeline 4 described in Embodiment 1. The vacuum valve is arranged on the drainage pipeline to control the on-off of the drainage pipeline. The controller is connected to the vacuum valve to control the opening and closing of the vacuum valve. The air normally open interfaces of the vacuum valve and the controller are both connected to the breathing port 14 of the breathing device; A liquid level detector 5 is also arranged in the vacuum well, and the liquid level detector is connected to the controller so that the controller starts or closes at a set threshold value.

[0035] Specifically, the water inlet end 41 of the drainage pipeline is arranged in the vacuum well and connected to the liquid surface, the water outlet end 42 is connected to the external vacuum pipeline, the vacuum valve is arranged in the middle of the drainage pipeline, the control end of the vacuum valve is connected to the output end of the controller, and the air normally open interface 21 of the vacuum valve is connected to the breathing port 14 of the breathing device; The vacuum interface of the controller is connected to the vacuum pipeline, the signal interface of the controller is connected to the liquid level detector 5, and the air normally open interface 31 of the controller is connected to the breathing port 14 of the breathing device; It can be understood that the breathing device 1 is arranged at a position above the high liquid level threshold value in the vacuum well.

[0036] In this embodiment, both the vacuum valve and the controller are driven by a pure mechanical mechanism. Therefore, air is required for switching when the vacuum valve and the controller are opened and closed. Specifically: when the vacuum valve is opened, the air interface will inhale air, and when the vacuum valve is closed, the air interface will discharge air; For the controller, the principle is basically similar to that of the vacuum valve. During the opening and closing process of the controller, the air interface of the controller will inhale or discharge air.

[0037] When the water level in the vacuum well rises normally to the high threshold, the liquid level detector transmits the detected data to the controller, the controller starts to open the vacuum valve, the drainage pipe is connected to the external vacuum pipe and starts to drain water. At this time, the breathing device does not work, and the float in the breathing device shell falls to the bottom of the shell due to no buoyancy of the liquid, and the gas circulation in the gas channel is normal, that is, the air circulation of the vacuum valve and the controller air normally open interface is normal; when the water level in the vacuum well rises rapidly, the vacuum valve is not started at the high threshold or the water level rises too fast for the drainage pipe to drain water in time and exceeds the high threshold. At this time, since sewage enters the shell from the bottom water inlet of the breathing device shell, the float floats up due to the buoyancy of the water and blocks the valve port, the gas channel of the breathing device is cut off and the gas does not circulate, that is, the air of the vacuum valve and the controller air normally open interface does not circulate, and sewage will not enter the vacuum valve and the controller, thereby protecting the equipment and avoiding damage to the entire valve system. It should be noted that after the gas channel is shut off, the vacuum valve and the controller remain in their original state. Specifically, before shutting off, if the controller and the vacuum valve are started and running, they will continue to run and pump water. Due to the lack of air circulation, the controller and the vacuum valve cannot be closed, and can only maintain the original operating state and continue to pump water until the liquid level drops and the float falls back to its original position due to gravity, and air circulation is re-established in the gas channel. Before shutting off, if the controller and the vacuum valve are not started, the controller and the vacuum valve will remain in an unstarted state during the period when the float blocks the valve port.

[0038] Specifically, the location where the breathing device is installed and the diameter of the float ball should be calculated based on the actual application.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] It should be emphasized that the above are only the preferred embodiments of the present utility model, and it is not a limitation of the present utility model in any form. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A vacuum well valve breathing device, connected to the air normally open interface of the valve, characterized in that: It comprises an upper cover and a shell that are assembled together, a floating ball is arranged in the shell and a water inlet is arranged at the bottom, and a gas passage is arranged in the upper cover. When liquid enters the shell, the floating ball moves upward due to the buoyancy of the liquid to block the gas passage so that the gas does not flow; The gas channel includes a breathing port, a balancing gas port, and a valve port disposed between the breathing port and the balancing gas port, and the float moves upward due to the buoyancy of the liquid to block the valve port so that the gas does not flow between the breathing port and the balancing gas port; The breathing port is arranged at the middle and upper end of the upper cover, the balancing air port is arranged on the upper cover and at the periphery of the breathing port, and the position of the breathing port is higher than the position of the balancing air port; the balancing air port connects the external air with the inner cavity of the shell.

2. The vacuum well valve breathing device according to claim 1, characterized in that: The valve port is arranged on the upper cover and at the connection between the upper cover and the shell.

3. The vacuum well valve breathing device according to claim 1, characterized in that: The balance air port comprises a plurality of air holes evenly arranged around the breathing port.

4. The vacuum well valve breathing device according to claim 1, characterized in that: The middle part of the upper cover is provided with a cavity, the cavity is arranged between the breathing port and the valve port, and the valve port communicates with the cavity and the inner cavity of the shell.

5. The vacuum well valve breathing device according to claim 1, characterized in that: The balance air port is an annular hole arranged on the outer periphery of the breathing port.

6. A vacuum well flood prevention system, used in a vacuum well, characterized in that: It comprises the breathing device, vacuum valve, controller and drainage pipe as described in any one of claims 1 to 5, wherein the vacuum valve is arranged on the drainage pipe to control the on-off of the drainage pipe, the controller is connected to the vacuum valve to control the opening and closing of the vacuum valve, and the air normally open interfaces of the vacuum valve and the controller are both connected to the breathing port of the breathing device.

7. The vacuum well flood prevention system according to claim 6, characterized in that: A liquid level detector is also provided in the vacuum well, and the liquid level detector is connected to the controller so that the controller is started or shut down at a set threshold.

8. The vacuum well flood prevention system according to claim 6, characterized in that: The water inlet end of the drainage pipe is arranged in the vacuum well, and the water outlet end is connected to the external vacuum pipe.

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