A floating ball type two-way stop valve control system

Abstract

The present invention relates to a float type two-way stop valve control system, comprising a drainage pipe, a vacuum valve installed on the drainage pipe and a two-way stop float for controlling the opening and closing of the vacuum valve; a two-way stop valve is arranged inside the two-way stop float, the two-way stop valve has an atmospheric air inlet connected to the atmosphere, a negative pressure air inlet connected to the drainage pipe and a vacuum valve connecting port connected to the vacuum valve, and a gravity steel ball is arranged inside for separately sealing the atmospheric air inlet and the negative pressure air inlet; the opening and closing of the vacuum valve in the present invention is controlled by the two-way stop valve, a pure mechanical structure is adopted, defects such as power supply voltage drop will not be generated, the overall structure is simple, the principle is reliable, and there is no operating cost; at the same time, the two-way stop valve is the core component of the present invention, which is installed inside the sealed two-way stop float and is not affected by the climate and the use environment, thereby ensuring the service life of the core component.

Description

Technical Field

[0001] The invention relates to the technical field of two-way stop valves, and in particular to a floating ball type two-way stop valve control system. Background Art

[0002] In the negative pressure sewage collection system, two control methods are often used: first, using the buoyancy of the float, the solenoid valve is turned on when the water level is high, and the negative pressure vacuum diaphragm valve is opened through the solenoid valve to achieve negative pressure pumping; when the water level is low, the buoyancy weakens, the solenoid valve loses power, and the negative pressure vacuum diaphragm valve closes the valve and stops pumping under the action of the atmosphere; second, using the pressure difference to control the opening of the negative pressure vacuum diaphragm valve, the water pressure increases when the water level is high, and when it reaches the set value, the solenoid valve is turned on, and the negative pressure vacuum diaphragm valve is opened through the solenoid valve to achieve negative pressure pumping; when the water level is low, the water pressure weakens, and when it reaches the set value, the solenoid valve loses power, and the negative pressure vacuum diaphragm valve closes the valve and stops pumping under the action of the atmosphere; the above two control methods , all must have power to realize control, but there are the following defects when using power: (1) The cable transmission distance of the sewage collection system project is relatively long, so the pressure drop at the end of the cable is large, the vacuum well at the tail end is greatly affected by the pressure drop, and the equipment operation is unstable; (2) The investment cost is high, the equipment failure rate is high, and each vacuum well will affect each other; (3) The waterproofing requirements are high, and the cables, terminal blocks, solenoid valves, etc. must be waterproofed. For this purpose, a corresponding equipment column is specially set up next to the vacuum well; (4) The system installation is cumbersome and costly; Therefore, the present invention has developed a float-type two-way stop valve control system to solve the problems existing in the prior art. After searching, no technical solutions identical or similar to the present invention were found. Summary of the invention

[0003] The purpose of the present invention is to provide a float type two-way stop valve control system to solve a series of problems such as unstable equipment operation, high failure rate and high cost caused by the need for power supply control to open and close the valve during sewage collection in the prior art.

[0004] The technical solution of the present invention is: a float-type two-way stop valve control system, including a drainage pipe, a vacuum valve installed on the drainage pipe and a two-way stop float for controlling the opening and closing of the vacuum valve; a two-way stop valve is arranged inside the two-way stop float, and the two-way stop valve has an atmospheric air inlet connected to the atmosphere, a negative pressure air inlet connected to the drainage pipe and a vacuum valve connecting port connected to the vacuum valve, and a gravity steel ball is arranged inside for separately sealing the atmospheric air inlet and the negative pressure air inlet.

[0005] Preferably, the two-way stop valve includes a shell, a first end cover and a second end cover installed at the upper and lower ends of the shell, and a gravity steel ball arranged inside the shell; the shell has a cavity with an "8"-shaped cross-section along the vertical direction, and the gravity steel ball is arranged in the cavity; the vacuum valve connection port is arranged on the side wall of the shell, the atmospheric air inlet is arranged on the first end cover, and the negative pressure air inlet is arranged on the second end cover.

[0006] Preferably, a planar sealing ring is nested on one end surface of the first end cover and the second end cover in the cavity.

[0007] Preferably, the drainage pipe includes a water pumping pipeline and a negative pressure pipeline, the vacuum valve is installed between the water pumping pipeline and the negative pressure pipeline, and is used to connect the water pumping pipeline and the negative pressure pipeline; the atmospheric air inlet is connected to the atmospheric air inlet pipe, the negative pressure air inlet and the negative pressure pipeline are connected with a negative pressure air inlet pipe, and the vacuum valve connecting port and the vacuum valve are connected with a valve body vent pipe.

[0008] Preferably, a liquid level switch is provided at one end of the atmospheric air inlet pipe away from the atmospheric air inlet port.

[0009] Preferably, a vent pipe is connected to the side wall of the water pumping pipeline, and the vent pipe extends upward in a vertical direction at one end biased toward the water pumping pipeline, and a vent regulating valve is provided at the end away from the water pumping pipeline; the atmospheric air inlet pipe, the negative pressure air inlet pipe and the valve body vent pipe are arranged in close contact with the vent pipe and are fixedly connected by snaps.

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] (1) The opening and closing of the vacuum valve in the present invention is controlled by a two-way stop valve, which adopts a purely mechanical structure and does not cause defects such as power supply voltage drop. The overall structure is simple, the principle is reliable, and there is no operating cost. At the same time, the two-way stop valve is the core component of the present invention. It is installed inside a sealed two-way stop float and is not affected by climate and use environment, thereby ensuring the service life of the core component.

[0012] (2) Compared with the prior art, the present invention has a low initial investment cost. When used in vacuum wells, each vacuum well is a complete independent body, and the normal operation of other equipment will not be affected by a failure in one place, thereby reducing the failure rate of the entire equipment.

[0013] (3) The present invention has no waterproofing requirements, so there is no need to set up control columns around the vacuum well, making the structure more concise, convenient for on-site installation, and safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a structural schematic diagram of a float type two-way stop valve control system according to the present invention when the vacuum valve is triggered to close;

[0016] Figure 2 It is a structural schematic diagram of the two-way stop valve of the present invention;

[0017] Figure 3 It is a partial enlarged view of a floating ball type two-way stop valve control system according to the present invention;

[0018] Figure 4 The present invention is a schematic structural diagram of a float type two-way stop valve control system when triggering a vacuum valve to open.

[0019] Among them: 1. Drainage pipe, 2. Pumping pipeline, 3. Negative pressure pipeline, 4. Vacuum valve, 5. Two-way stop float, 6. Two-way stop valve, 7. Shell, 8. Cavity, 9. Gravity steel ball, 10. First end cover, 11. Second end cover, 12. Flat sealing ring, 13. Vacuum valve connection port, 14. Atmospheric air inlet, 15. Negative pressure air inlet, 16. Valve body vent pipe, 17. Atmospheric air inlet pipe, 18. Negative pressure air inlet pipe, 19. Liquid level switch, 20. Vent pipe, 21. Vent regulating valve. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with specific embodiments:

[0021] like Figure 1 As shown, a float type two-way stop valve control system is used in a vacuum well to extract and discharge sewage discharged into the vacuum well. Its structure mainly includes a drainage pipe 1, a vacuum valve 4 installed on the drainage pipe 1 and a two-way stop float 5 for controlling the opening and closing of the vacuum valve 4.

[0022] The drainage pipe 1 has a "7"-shaped structure, including a water pumping pipe 2 arranged in the vertical direction and a negative pressure pipe 3 arranged in the horizontal direction. During installation, the water pumping pipe 2 is used to extend downward to the bottom of the vacuum well to facilitate the purpose of pumping water; the vacuum valve 4 is installed between the water pumping pipe 2 and the negative pressure pipe 3, and is used to connect the water pumping pipe 2 and the negative pressure pipe 3.

[0023] The two-way stop float 5 is a sealing structure, and a two-way stop valve 6 is arranged inside. Figure 2As shown, the two-way stop valve 6 includes a shell 7, a first end cover 10 and a second end cover 11 which are nested and installed at the upper and lower ends of the shell 7, and a gravity steel ball 9 arranged inside the shell 7. The shell 7 has a cavity 8 with an "8"-shaped cross-section along the vertical direction. The gravity steel ball 9 is arranged in the cavity 8 and can move in the cavity 8; the gravity steel ball 9 is used to block the atmospheric air inlet or the negative pressure air inlet under different conditions, so the first end cover 10 and the second end cover 11 are nested on one side of the end surface of the cavity 8 to effectively ensure the sealing performance of the blockage; a vacuum valve connection port 13 connected to the cavity 8 is arranged on the side wall of the shell 7, an atmospheric air inlet 14 connected to the cavity 8 is arranged on the first end cover 10, and a negative pressure air inlet 15 connected to the cavity 8 is arranged on the second end cover 11; as shown Figure 3 As shown, the vacuum valve connecting port 13 is connected to the vacuum valve 4 via a valve body vent pipe 16, the atmospheric air inlet 14 is connected to an atmospheric air inlet pipe 17, and a liquid level switch 19 is also provided at the end away from the atmospheric air inlet 14, and the negative pressure air inlet 15 is connected to the negative pressure pipeline 3 via a negative pressure air inlet pipe 18.

[0024] As a further optimization of this embodiment, since the rise and fall of the liquid level in the vacuum well will affect the gas pressure inside the pumping pipeline 2, a vent pipe 20 is connected to the side wall of the pumping pipeline 2, and the vent pipe 20 extends upward in the vertical direction at one end that is biased toward the pumping pipeline 2, and a vent regulating valve 21 is provided at the end away from the pumping pipeline 2; and since the two-way stop valve 6 needs to be set at the lower end of the vacuum well, the atmospheric air intake pipe 17, the negative pressure air intake pipe 18 and the valve body vent pipe 16 need to extend downward. In order to prevent the pipelines from being arranged too messily, they are set in close contact with the vent pipe 20 and fixedly connected by snaps. The snap connection cannot affect the flipping of the two-way stop float 5, and in order to facilitate the snap connection, the vent pipe 20 set in the vertical direction can adopt a hard structure.

[0025] When the vacuum well is at a low water level, the two-way stop float 5 moves vertically downward. Figure 1 As shown, at this time, the state of the two-way stop valve 6 inside the two-way stop float 5 is as follows Figure 2 As shown, the gravity steel ball 9 falls to the bottom of the shell 7 under the action of gravity, sealing the negative pressure air inlet 15, and due to the action of the flat sealing ring 12, the sealing performance of the blockage is guaranteed. At this time, the atmospheric air inlet 14 is connected with the vacuum valve connecting port 13, and the vacuum valve 4 is closed; the vacuum valve 4 belongs to the prior art, and it is mainly closed because the internal diaphragm is rapidly deformed by the action of the atmosphere, so the present invention will not further elaborate on the detailed structure inside the vacuum valve 4.

[0026] When the water level in the vacuum well is high, the two-way stop float 5 will rotate 180° due to the restraining effect. Figure 4As shown, at this time, the two-way stop valve 6 will also rotate 180°, and its state is the same as Figure 2 In the opposite state, the gravity steel ball 9 will fall to the bottom under the action of gravity, sealing the atmospheric air inlet 14, and due to the action of the flat sealing ring 12, the sealing performance of the blockage is guaranteed. At this time, the negative pressure air inlet 15 is connected to the vacuum valve connecting port 13, and the vacuum valve 4 is opened. This is mainly because the negative pressure gas will cause the internal diaphragm to deform and shrink rapidly. Since it belongs to the prior art, it will not be described in more detail.

[0027] At the same time, in order to take into account the influence of extreme weather, such as heavy rain, the water in the vacuum well will overflow, and the atmospheric air inlet pipe 17 will also easily enter with water, which will affect the normal opening and closing of the vacuum valve 4. Therefore, a liquid level switch 19 is provided at the end of the atmospheric air inlet pipe 17. Before the water in the vacuum well overflows, the liquid level switch 19 can automatically close the two-way stop valve 6, that is, block the atmospheric air inlet 14, and the negative pressure air inlet 15 is connected with the vacuum valve connecting port 13, thereby ensuring the normal operation of the vacuum valve 4.

[0028] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A floating ball type two-way stop valve control system, characterized in that: It includes a drainage pipe, a vacuum valve installed on the drainage pipe, and a two-way stop float for controlling the opening and closing of the vacuum valve; the two-way stop float is provided with a two-way stop valve inside, the two-way stop valve has an atmospheric air inlet connected to the atmosphere, a negative pressure air inlet connected to the drainage pipe, and a vacuum valve connection port connected to the vacuum valve, and a gravity steel ball is provided inside to seal the atmospheric air inlet and the negative pressure air inlet separately; The two-way stop valve comprises a housing, a first end cover and a second end cover installed at the upper and lower ends of the housing, and a gravity steel ball arranged inside the housing; the housing has a cavity with an "8"-shaped cross section along the vertical direction, and the gravity steel ball is arranged in the cavity; the vacuum valve connection port is arranged on the side wall of the housing, the atmospheric air inlet is arranged on the first end cover, and the negative pressure air inlet is arranged on the second end cover; The first end cover and the second end cover are nested with a planar sealing ring on one end surface in the cavity; The drainage pipeline includes a water pumping pipeline and a negative pressure pipeline. The vacuum valve is installed between the water pumping pipeline and the negative pressure pipeline and is used to connect the water pumping pipeline and the negative pressure pipeline. The atmospheric air inlet is connected to the atmospheric air inlet pipe, the negative pressure air inlet and the negative pressure pipeline are connected with a negative pressure air inlet pipe, and the vacuum valve connecting port and the vacuum valve are connected with a valve body ventilation pipe.

2. A floating ball type two-way stop valve control system according to claim 1, characterized in that: A liquid level switch is arranged at one end of the atmospheric air inlet pipe away from the atmospheric air inlet port.

3. A floating ball type two-way stop valve control system according to claim 1, characterized in that: A vent pipe is connected to the side wall of the water pumping pipeline, and the vent pipe extends upward in a vertical direction at one end thereof which is biased toward the water pumping pipeline, and a vent regulating valve is provided at the end thereof which is away from the water pumping pipeline; the atmospheric air inlet pipe, the negative pressure air inlet pipe and the valve body vent pipe are arranged in contact with the vent pipe and are fixedly connected by snaps.

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