A new siphon bucket structure

Abstract

The utility model provides a novel siphon barrel structure, including metal jar body, waste water pump, water replenishing pipeline, the liquid suction pipeline of extending into the waste liquid pit, the pressure switch of controlling waste water pump motor start -stop, the liquid suction pipeline, waste water pump, water replenishing pipeline all are connected with jar body, the top of jar body is provided with first exhaust valve for removing the air in jar body, be equipped with water replenishing electromagnetic valve on water replenishing pipeline, the pressure switch is located in the export end of waste water pump, the jar body bottom is equipped with the first liquid level transmitter of detecting the liquid level height in jar body, water replenishing electromagnetic valve with waste water pump all with first liquid level transmitter electricity is connected. The utility model provides a novel siphon barrel structure, need not manual intervention, can in the low liquid level or waste water pit in the low liquid level in siphon barrel under the condition timely stop waste water pump, avoided the problem of waste water pump " idling", reduced the damage risk of waste water pump.

Description

Technical Field

[0001] This utility model relates to a self-priming system for non-acidic waste liquid pits, and more particularly to a novel siphon tank structure. Background Technology

[0002] Siphon tank equipment is commonly used to pump waste liquid from wastewater pits. However, in existing siphon tank systems, when the liquid level in the siphon tank is low or there is no liquid, the wastewater pump can only draw a gas-liquid mixture or pure air from the siphon tank. This results in the wastewater pump "dry running," without sufficient liquid to lubricate and cool the pump, making it prone to damage and leading to a high failure rate. By the time inspection personnel discover that the liquid level in the wastewater pit is low and the pump needs to be stopped, it is often already damaged.

[0003] In addition, most siphon tanks are currently made of plastic, which is prone to thermal expansion and contraction, leading to deformation and air leakage in the system. This can cause insufficient negative pressure inside the siphon tank during the use of the wastewater pump, resulting in the pump running dry and causing significant damage to the pump's mechanical seal.

[0004] Therefore, it is necessary to design a new type of siphon tank structure to provide more comprehensive protection for the wastewater pump and extend its service life. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the prior art and provide a new siphon bucket structure. This utility model solves at least some of the problems in the prior art.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a novel siphon tank structure, including a metal tank, a wastewater pump, a water supply pipe, a suction pipe extending into a waste liquid pit, and a pressure switch for controlling the start and stop of the wastewater pump motor. The suction pipe, wastewater pump, and water supply pipe are all connected to the tank. A first exhaust valve for venting air from the tank is provided at the top of the tank. A water supply solenoid valve is provided on the water supply pipe. The pressure switch is located at the outlet end of the wastewater pump. A first level transmitter for detecting the liquid level in the tank is provided at the bottom of the tank. The water supply solenoid valve and the wastewater pump are both electrically connected to the first level transmitter.

[0008] Furthermore, the tank body is made of stainless steel.

[0009] Furthermore, one end of the liquid suction pipe is connected to the upper side of the tank, and the other end of the liquid suction pipe is equipped with a filter screen.

[0010] Furthermore, the novel siphon barrel structure also includes a compressed air purging pipe, the outlet of which faces the filter screen.

[0011] Furthermore, both the wastewater pump and the water supply pipe are connected to the top of the tank.

[0012] Furthermore, the tank body has a height of not less than 1m and a diameter of not less than 0.5m.

[0013] Furthermore, the new siphon tank structure also includes a top cover for sealing the tank, the top cover having a double-layer PTFE gasket on the side facing the tank.

[0014] Furthermore, a sealant is applied between the top cover and the tank body.

[0015] Furthermore, the bottom of the tank is also equipped with a drain pipe for emptying the liquid inside the tank during maintenance.

[0016] Furthermore, the new siphon tank structure also includes a second level transmitter for detecting the liquid level in the waste liquid pit, and the second level transmitter is electrically connected to the wastewater pump.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model provides a novel siphon tank structure that can stop the wastewater pump in time when the liquid level in the siphon tank or wastewater pit is low without manual intervention, thus avoiding the problem of the wastewater pump "dry running" and reducing the risk of damage to the wastewater pump.

[0019] 2. In this utility model, a first level transmitter for detecting the liquid level in the tank is provided at the bottom of the tank. The water supply solenoid valve and the wastewater pump are both electrically connected to the first level transmitter. The first level transmitter transmits the detected liquid level information to the control system (such as PLC). The control system controls the operation of the water supply solenoid valve and the wastewater pump according to the received liquid level information. Specifically, when the liquid level is low, the wastewater pump is turned off to effectively protect the wastewater pump, and the water supply solenoid valve on the water supply pipeline is opened to supply water to the tank. When the liquid level is high, the water supply solenoid valve on the water supply pipeline is closed.

[0020] 3. In this utility model, the pressure switch is located at the outlet end of the wastewater pump. The pressure switch is used to detect the pressure at the outlet end of the wastewater pump. When the liquid in the tank is emptied or the inlet pipe of the wastewater pump is blocked, the wastewater pump loses its liquid source and the pressure at the outlet end of the wastewater pump decreases. When it is lower than the preset low pressure trigger value of the pressure switch, the contacts of the pressure switch open, cutting off the control circuit of the wastewater pump motor, causing the wastewater pump to stop running, avoiding the "dry running" of the wastewater pump, and playing a protective role for the wastewater pump.

[0021] 4. In this utility model, the novel siphon tank structure also includes a second level transmitter for detecting the liquid level in the waste liquid pit. The second level transmitter is electrically connected to the wastewater pump. The second level transmitter transmits the detected liquid level information to the control system (such as a PLC). The control system controls the wastewater pump to operate based on the received liquid level information. When the liquid level in the waste liquid pit is low, but the first level transmitter and the pressure switch both malfunction, the control system can promptly shut off the wastewater pump through the low liquid level signal provided by the second level transmitter, thus effectively protecting the wastewater pump.

[0022] 5. In this utility model, the siphon bucket is made of stainless steel, which has small deformation and good negative pressure retention.

[0023] 6. In this utility model, the top cover of the siphon bucket adopts a double sealing gasket and is coated with sealant to effectively maintain the negative pressure inside the siphon bucket. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the novel siphon bucket structure provided in the embodiments of this utility model;

[0026] Figure 2 Provided for the embodiments of this utility model Figure 1 The enlarged image in the upper right corner;

[0027] Figure 3 Provided for the embodiments of this utility model Figure 1 The enlarged image in the top left corner;

[0028] Figure 4 An enlarged view of the filter screen provided in an embodiment of this utility model.

[0029] In the diagram: 1. Tank body; 2. Suction pipe; 3. Pumping pipe; 4. Water supply pipe; 5. First vent valve; 6. Filter screen; 7. Compressed air purging pipe; 8. Drain pipe; 9. Wastewater pump; 10. First level transmitter; 11. Pressure switch; 12. Waste liquid pit; 13. Second level transmitter; 14. Check valve; 15. Butterfly valve; 16. Second vent valve; 17. Reducer; 18. Compensator; 19. Water supply solenoid valve. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "several" means two or more.

[0033] like Figures 1-4This utility model provides a novel siphon tank structure, including a metal tank 1, a wastewater pump 9, a water replenishment pipe 4, a suction pipe 2 extending into a (alkali-containing) waste liquid pit 12, and a pressure switch 11 (PS) controlling the start and stop of the wastewater pump 9 motor. The suction pipe 2, wastewater pump 9, and water replenishment pipe 4 are all connected to the tank 1. The top of the tank 1 is equipped with a first exhaust valve 5 for venting air from the tank, effectively venting air from the tank 1. The water replenishment pipe 4 is equipped with a water replenishment solenoid valve 19. The pressure switch 11 is located at the outlet end of the wastewater pump 9 and is used to detect the pressure at the outlet end of the wastewater pump 9. When the pressure in the tank 1... If the liquid is pumped out or the inlet pipe of the wastewater pump 9 is blocked, the wastewater pump 9 loses its liquid source and the pressure at the outlet of the wastewater pump 9 decreases. When the pressure drops below the preset low-pressure trigger value of the pressure switch 11, the contacts of the pressure switch 11 open, cutting off the control circuit of the wastewater pump 9 motor and stopping the wastewater pump 9 from running, thus preventing the wastewater pump 9 from "dry running" and protecting the wastewater pump 9. The working principle of the pressure switch 11 is existing technology and will not be described in detail here. The bottom of the tank 1 is equipped with a first liquid level transmitter 10 for detecting the liquid level in the tank 1. The water replenishment solenoid valve 19 and the wastewater pump 9 are both electrically connected to the first liquid level transmitter 10. In this embodiment, the first level transmitter 10 transmits the detected level information to the control system (such as a PLC). Based on the received level information, the control system controls the operation of the water replenishment solenoid valve 19 and the wastewater pump 9. Specifically, when the level is low, the wastewater pump 9 is shut off, and the water replenishment solenoid valve 19 on the water replenishment pipe 4 is opened to replenish water into the tank 1. When the level is high, the water replenishment solenoid valve 19 on the water replenishment pipe 4 is closed. This invention uses the first level transmitter 10 to detect the level in the tank 1, providing protection for the wastewater pump 9 and preventing serious damage to the pump 9 caused by problems such as cavitation, idling, and overheating when the level in the tank 1 is low. The first level transmitter 10 and the pressure switch 11 work together to protect the wastewater pump 9. When the first level transmitter 10 malfunctions, the pressure switch 11 can serve as a backup safety barrier for the wastewater pump 9. Additionally, an alarm function can be provided as needed when the level is low. The suction port of wastewater pump 9 is connected to the outlet flange of tank 1, and the outlet of wastewater pump 9 is connected to the liquid extraction pipe 3. The liquid extraction pipe 3 is equipped with a second vent valve 16. Both the first vent valve 5 and the second vent valve 16 are ball valves.

[0034] Before use, fill tank 1 with water, remove all air from tank 1 through the first vent valve 5, and quickly remove air from the liquid extraction pipe 3 through the second vent valve 16. Check the sealing of tank 1 to ensure it is intact, creating a vacuum environment inside tank 1. Then start wastewater pump 9 and monitor the liquid level changes in tank 1 through the first liquid level transmitter 10.

[0035] In this embodiment, the suction pipe 2 extends into the alkaline wastewater pit. Because the tank 1 is in a vacuum environment, after the wastewater pump 9 removes some of the liquid from the tank 1, the tank 1 is under negative pressure. The wastewater in the alkaline wastewater pit will be sucked into the tank 1 and then pumped away by the wastewater pump 9, and sent to a unified sewage treatment equipment through the suction pipe 3.

[0036] The tank body 1 is made of stainless steel. In this embodiment, the tank body 1 is made of SUS304 stainless steel.

[0037] One end of the liquid suction pipe 2 is connected to the upper side of the tank 1, and the other end of the liquid suction pipe 2 is equipped with a filter screen 6 to prevent the liquid suction pipe 2 from being blocked. No valves are installed on the liquid suction pipe 2 to reduce liquid flow resistance.

[0038] The new siphon barrel structure also includes a compressed air purging pipe 7, the outlet of which faces the filter screen 6. When the filter screen 6 is blocked, the debris is removed by high-pressure air purging.

[0039] Both the wastewater pump 9 and the water supply pipe 4 are connected to the top of the tank 1. The water supply pipe 4 is welded to the top of the tank 1.

[0040] The tank 1 has a height of not less than 1m and a diameter of not less than 0.5m to facilitate the formation of sufficient negative pressure. In this embodiment, the tank 1 is a stainless steel cylindrical tank with a height of 1.2m and a diameter of 0.5m.

[0041] The novel siphon tank structure also includes a top cover for sealing the tank body 1, wherein the top cover has a double-layer PTFE gasket (double-layer polytetrafluoroethylene gasket) on the side facing the tank body 1. A sealant is applied between the top cover and the tank body 1 for sealing.

[0042] The bottom of the tank 1 is also equipped with a drain pipe 8 for emptying the liquid inside the tank 1 during maintenance.

[0043] The novel siphon tank structure also includes a second level transmitter 13 for detecting the liquid level in the waste liquid pit 12. The second level transmitter 13 is electrically connected to the wastewater pump 9. Specifically, the second level transmitter 13 transmits the detected liquid level information to the control system (such as a PLC). The control system controls the wastewater pump 9 to operate based on the received liquid level information. The second level transmitter 13 continuously measures the liquid level in the waste liquid pit 12 and transmits the liquid level signal to the central control room, where the operator can view the real-time liquid level curve on the screen. The second level transmitter 13 can also serve as a supplementary safety barrier for protecting the wastewater pump 9. When the liquid level in the waste liquid pit 12 is low, but both the first level transmitter 10 and the pressure switch 11 malfunction, the control system can promptly shut down the wastewater pump 9 using the low liquid level signal provided by the second level transmitter 13. Figure 1LI in the figure represents the visible liquid level on-site, allowing inspection personnel to know the liquid level without needing to look at the central control room.

[0044] like Figure 1 This embodiment includes two sets of the aforementioned novel siphon tank structures, and also includes a level switch LSA for detecting the liquid level in the waste liquid pit 12. The level switch LSA is a field control switch and can provide an ultra-low liquid level (LL) alarm. Both sets of wastewater pumps 9 are electrically connected to the level switch LSA. When the liquid level switch LSA is at an ultra-high liquid level (HH), it controls both sets of wastewater pumps 9 to work; when the liquid level switch LSA is at a high liquid level (H), it starts only one wastewater pump 9; when the liquid level switch LSA is at a low liquid level (L), it controls both sets of wastewater pumps 9 to shut down.

[0045] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel siphon bucket structure, characterized in that: The system includes a metal tank, a wastewater pump, a water supply pipe, a suction pipe extending into the waste liquid pit, and a pressure switch controlling the start and stop of the wastewater pump motor. The suction pipe, wastewater pump, and water supply pipe are all connected to the tank. A first vent valve for venting air from the tank is installed at the top of the tank. A water supply solenoid valve is installed on the water supply pipe. The pressure switch is located at the outlet end of the wastewater pump. A first level transmitter for detecting the liquid level in the tank is installed at the bottom of the tank. The water supply solenoid valve and the wastewater pump are both electrically connected to the first level transmitter.

2. The novel siphon bucket structure as described in claim 1, characterized in that: The tank is made of stainless steel.

3. The novel siphon bucket structure as described in claim 1, characterized in that: One end of the liquid suction pipe is connected to the upper side of the tank, and the other end of the liquid suction pipe is equipped with a filter screen.

4. The novel siphon bucket structure as described in claim 3, characterized in that: The new siphon barrel structure also includes a compressed air purging pipe, the outlet of which faces the filter screen.

5. The novel siphon bucket structure as described in claim 1, characterized in that: Both the wastewater pump and the water supply pipe are connected to the top of the tank.

6. The novel siphon bucket structure as described in claim 1, characterized in that: The tank body is not less than 1m in height and not less than 0.5m in diameter.

7. The novel siphon bucket structure as described in claim 1, characterized in that: The new siphon tank structure also includes a top cover for sealing the tank, and the top cover has a double-layer PTFE gasket on the side facing the tank.

8. The novel siphon bucket structure as described in claim 7, characterized in that: A sealant is applied between the top cover and the tank body.

9. The novel siphon bucket structure as described in claim 1, characterized in that: The bottom of the tank is also equipped with a drain pipe for emptying the liquid inside the tank during maintenance.

10. The novel siphon bucket structure as described in claim 1, characterized in that: The new siphon tank structure also includes a second level transmitter for detecting the liquid level in the waste liquid pit, which is electrically connected to the wastewater pump.

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