Bottom-valve-free automatic vacuum siphon drainage device of self-priming pump

Abstract

The utility model discloses a bottom-valve-free automatic vacuum siphon drainage device of a self-priming pump, and belongs to the technical field of self-priming pumps. Comprising a water tank, and a water suction pipeline extending into a sedimentation tank is communicated with the upper position of the outer side of the water tank; the lower position of the outer side of the water tank communicates with the inlet end of the self-priming pump. The liquid level meter is arranged in the sedimentation tank; the flow meter is arranged at the outlet end of the self-priming pump; and the liquid level meter and the flow meter are in communication connection with a DCS cabinet. The device is simple and reliable in overall structure, low in cost and low in maintenance requirement; moreover, the working efficiency of the water pump is improved, the power consumption is reduced, and the occurrence of faults and the later operation cost are reduced; impurities are prevented from entering the self-priming pump, the overall high availability is guaranteed, and the maintenance requirements are further reduced; pipeline resistance can be reduced, and energy consumption of the water pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of self-priming pumps, in particular to an automatic vacuum siphon suction device for a self-priming pump without a bottom valve. Background Art

[0002] Water pumps are one of the most important energy-consuming equipment in my country's industrial and agricultural production, and are widely used in all aspects of production and life. According to calculations by the General Machinery Industry Association, the current power consumption of water pumps accounts for approximately 20% of the country's total power generation. At present, the efficiency of domestic water pumps that have not been upgraded and optimized is 3% to 5% lower than the advanced level abroad on average, and the efficiency of the entire water pump system is about 20% lower than the same period last year. Therefore, strengthening energy-saving technology work in the pump industry has become an important part of the current national energy-saving work. In this context, actively promoting the use of water pump energy-saving technology is not only in line with my country's national policy of energy conservation and consumption reduction, but also can bring considerable economic benefits to enterprises, which has great practical significance.

[0003] In coking enterprises, self-priming pumps are essential drainage facilities; single-stage and multi-stage centrifugal self-priming pumps with bottom valves are mostly used for general industrial water circulation water dosing and wastewater recycling. For example, the sewage discharge system of the company's steam turbine circulating water system, the circulating water cooling tower, and the fully automatic valveless filter discharge sewage to the sedimentation tank, which is then pumped out by the sedimentation pump and sent to the sedimentation water network for use.

[0004] Installation of bottom valve on sedimentation pump Figure 1 As shown, there are the following problems in use:

[0005] (1) It is difficult to inject water and drain air, the number of starts is high, the number of shocks increases, and the power consumption is high; if the pump fails to start once, it needs to be injected with water and started again;

[0006] (2) If there is a sudden power outage, the bottom valve is often damaged or stuck; even if the water pump is running normally, the bottom valve may be stuck or damaged, which affects the running efficiency of the water pump and increases the maintenance workload and maintenance costs;

[0007] (3) Since the water pump cannot operate normally, it affects both production and the water quality indicators of circulating water;

[0008] (4) If there is debris at the bottom of the sedimentation tank, the pump bottom valve is prone to blockage, resulting in a decrease in the flow rate of the pump, or even no flow at all. The bottom valve of the self-priming pump must be cleaned and repaired, which increases the workload and manpower input of the workers and reduces efficiency. Utility Model Content

[0009] The utility model aims to solve the above problems in the prior art and proposes a self-priming pump bottom-valve-free automatic vacuum siphon suction device.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A self-priming pump bottomless valve automatic vacuum siphon suction device comprises a water tank, the upper outer side of the water tank is connected to a water suction pipe extending into a sedimentation tank; the lower outer side of the water tank is connected to the inlet end of the self-priming pump;

[0012] It also includes: a liquid level meter arranged in the sedimentation tank, and a flow meter arranged at the outlet end of the self-priming pump;

[0013] The liquid level meter and flow meter are communicatively connected to the DCS cabinet.

[0014] In some embodiments, a filter is disposed at an upper position inside the water tank.

[0015] In some embodiments, an inspection port is provided on the top of the water tank, and a top cover is provided on the inspection port.

[0016] In some embodiments, an exhaust and water-adding ball valve is provided on the top cover.

[0017] In some embodiments, an electronic liquid level meter is disposed inside the water tank and is communicatively connected to a DCS cabinet.

[0018] In some embodiments, a water inlet pipe is provided at an upper position on the outer side of the water tank;

[0019] A flange is arranged at the end of the water inlet pipe and is detachably connected to the water suction pipe.

[0020] In some embodiments, a water outlet is provided at a lower position on one side of the water tank;

[0021] The water outlet is provided with a flange which is detachably connected to the inlet pipe of the self-priming pump.

[0022] In some embodiments, a valve and a pressure gauge are provided on the outlet pipe of the self-priming pump.

[0023] In some embodiments, the main body of the water tank is a DN700 pipe; a plug is provided at the bottom of the main body, and a flange blind plate is provided at the top to form an inspection port and a top cover.

[0024] In some embodiments, the DCS cabinet is communicatively connected to a computer.

[0025] Compared with the prior art, the utility model provides a self-priming pump bottom-valve-less automatic vacuum siphon suction device, which has the following beneficial effects.

[0026] 1. The utility model has a simple and reliable overall structure, low cost and less maintenance requirements; moreover, it improves the working efficiency of the water pump, reduces power consumption, reduces the occurrence of failures and subsequent operating costs.

[0027] 2. The utility model is provided with a filter to prevent debris from entering the self-priming pump, thereby ensuring overall high availability and further reducing maintenance requirements; it can reduce pipeline resistance, reduce the energy consumption of the water pump itself, reduce the vacuum degree of the water pump suction port, reduce the occurrence of cavitation during the operation of the water pump, and further reduce maintenance costs.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of a self-priming pump.

[0030] Figure 2 It is a structural schematic diagram of the utility model.

[0031] In the figure:

[0032] 1. Water tank; 11. Water inlet pipe; 12. Water outlet; 13. Drain valve; 2. Suction pipe; 3. Self-priming pump; 31. Inlet pipe; 32. Outlet pipe; 4. Liquid level meter; 5. Flow meter; 6. Filter; 7. Top cover; 8. Exhaust and water filling ball valve; 9. Pressure gauge; 100. Sedimentation tank. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0034] Reference Figure 1 , the working principle of bottom valve self-priming pump drainage:

[0035] Before starting the centrifugal self-priming water pump, the pump body and the water suction pipe are required to be in a vacuum state. The bottom valve installed at the lower end of the water suction pipe is equivalent to a one-way valve. After the water pump is filled or stopped, the bottom valve is closed, and the water in the pump body fills the pump body and the water suction pipe without leakage. When the water pump is running, the water pump impeller rotates to generate centrifugal force. Under the action of centrifugal force, the water in the impeller flows from the water pump inlet to the outlet and enters the drain pipe before being discharged. At the same time, the pressure at the impeller inlet drops due to the discharge of water, forming a partial vacuum. The water in the water suction well pushes open the bottom valve core under the action of atmospheric pressure and is pressed into the impeller inlet through the water suction pipe. Therefore, the rotating impeller continuously sucks in and discharges water.

[0036] In order to improve the working efficiency of the water pump, reduce power consumption and reduce maintenance, the bottom valve pump is replaced with a bottom-valveless automatic vacuum siphon suction device to achieve bottom-valveless drainage of the water pump; it not only improves the working efficiency of the water pump, reduces power consumption, but also reduces the maintenance workload of the water pump. The basic principle is to remove the bottom valve of the water pump and replace it with a sealed water tank (such as Figure 2 As shown); when the water pump starts, it first sucks in the water in the sealed water tank, reducing the internal pressure of the water tank and forming a partial vacuum; thereby, the water in the suction well is sucked into the water tank through the suction pipe under the siphon effect of atmospheric pressure to ensure the normal operation of the water pump.

[0037] Reference Figure 2 A self-priming pump bottomless valve automatic vacuum siphon suction device includes a water tank 1, the upper outer side of the water tank 1 is connected to a water suction pipe 2 extending into a sedimentation tank 100; the lower outer side of the water tank 1 is connected to the inlet end of a self-priming pump 3.

[0038] The sedimentation tank 100 is connected to the self-priming pump 3 through the water tank 1; when starting, the self-priming pump 3 draws water from the lower position of the water tank 1, so that the internal pressure of the sealed tank body is reduced, and the water suction pipe 2 fills the tank with water from the sedimentation tank 100 under the action of atmospheric pressure; the overall startup is smooth and efficient, and there is no impact, exhaust and other problems.

[0039] Furthermore, it also includes: a liquid level meter 4 arranged in the sedimentation tank 100, and a flow meter 5 arranged at the outlet end of the self-priming pump 3; accordingly, the liquid level meter 4 and the flow meter 5 are communicatively connected to the DCS cabinet; by monitoring the water level and flow, automatic control operations are realized, and the entire process does not require human intervention, which is more intelligent and efficient.

[0040] Furthermore, a filter screen 6 is provided at the upper inner portion of the water tank 1 .

[0041] It is understandable that the filter screen 6 is located below the incoming water; the incoming water is initially filtered to prevent debris from entering the self-priming pump 3 and causing damage, blockage, etc., thereby ensuring overall high availability and reducing maintenance requirements.

[0042] It is understandable that the filter screen 6 needs to be cleaned regularly to remove filtered debris.

[0043] In some embodiments, an inspection port is provided on the top of the water tank 1, and a top cover 7 is provided on the inspection port to facilitate cleaning and maintenance of the interior.

[0044] It is understandable that the top cover 7 is sealed in a normal state to form a closed space inside the tank; when maintenance is required, the top cover 7 is removed.

[0045] In some embodiments, an exhaust and water-adding ball valve 8 is provided on the top cover 7 to regulate the water level inside.

[0046] Furthermore, an electronic liquid level gauge is provided inside the water tank 1 and is communicatively connected to the DCS cabinet; when the water level is detected to be lower than a threshold, personnel are promptly reminded to replenish water inside.

[0047] Furthermore, the exhaust and water-adding ball valve 8 is an electrically controlled valve and is communicatively connected to the DCS cabinet; accordingly, the exhaust and water-adding ball valve 8 is connected to the external water supply and can be controlled as a whole by the DCS cabinet to achieve automatic water replenishment when there is a lack of water inside.

[0048] In some embodiments, a water inlet pipe 11 is provided at the upper outer side of the water tank 1, and a flange is provided at the end of the water inlet pipe 11 so as to be detachably connected to the water suction pipe 2; a water outlet 12 is provided at the lower side of the water tank 1, and a flange is provided on the water outlet 12 so as to be detachably connected to the inlet end pipe 31 of the self-priming pump 3, so as to facilitate quick disassembly, assembly and maintenance.

[0049] In some embodiments, a valve and a pressure gauge 9 are provided on the outlet pipe 32 of the self-priming pump 3 to control the water delivery.

[0050] In some embodiments, a drain valve 13 is disposed at a lower position on one side of the water tank 1 .

[0051] In some embodiments, the main body of the water tank 1 is a DN700 pipe; a plug is provided at the bottom of the main body, and a flange blind plate is provided at the top to form an inspection port and a top cover 7.

[0052] Preferably, the water tank is made of DN700*8mm seamless carbon steel pipe; the thickness of the steel plate can be determined according to the actual head of the water pump; if the head is high, a thicker steel plate is required to avoid the impact of negative pressure on the tank body during the start-up process of the water pump; each welding part must be firm so as not to affect the normal use of the water tank. The shape of the water tank is generally cylindrical, which is convenient to process and install; the structure is determined according to the space at the installation site and the size of the water pump. According to usage experience, the water storage volume of the water tank under normal pressure should be greater than 4 times the air volume; that is, the internal water volume is not less than 80%; at the same time, its air volume must be less than the maximum allowable cavitation volume of the water pump.

[0053] In some embodiments, the DCS cabinet is communicatively connected to a host computer so that personnel can view the operation status and data.

[0054] The self-priming pump of the sedimentation tank is the main component of the company's production system circulating water sewage discharge, and plays an important role in controlling the water quality indicators of circulating water sewage discharge. It is necessary to strengthen the monitoring of this equipment to ensure the safe, economical and stable operation of the company's circulating water system.

[0055] The bottom-valve-less water tank drainage device provided in the present application, when applied to a centrifugal self-priming water pump, has at least the following advantages.

[0056] (1) Due to the frequent addition of chemicals to control indicators in the circulating water and the large amount of sand and gravel in the surface water, and the normal water temperature is 40~50℃, long-term use can easily cause the bottom valve to corrode, become damaged, stuck, or become loose and lose its function; repairing and replacing the bottom valve is time-consuming and labor-intensive, and affects the normal operation of the steam turbine production system; there is no similar situation when using a water tank without a bottom valve.

[0057] (2) The bottom valve of a running water pump is often damaged due to quality problems, inhalation of debris, or damage to the bottom valve seal due to sudden power outages or operator errors, resulting in the pump being unable to start due to insufficient water supply. This situation does not exist in a water tank without a bottom valve.

[0058] (3) A filtering structure is set up to perform preliminary filtration on the incoming water to prevent debris from entering the self-priming pump and causing damage or blockage, thereby ensuring overall high availability and reducing maintenance requirements.

[0059] (4) Since the bottom-valveless water tank has no bottom valve, the resistance of the pipeline is reduced accordingly, the energy consumption of the water pump itself is reduced, and the working efficiency of the water pump is greatly improved; at the same time, compared with the drainage pump with a bottom valve, under the condition of the same water suction height, the vacuum degree of the water pump suction port is reduced, the occurrence of cavitation during the operation of the water pump is reduced, and the maintenance cost is reduced.

[0060] (5) The production cost is low. Only the material cost of 2 to 3 foot valves is needed to produce this drainage device, which can ensure long-term stable use.

[0061] (6) Good power saving effect. The drainage without bottom valve reduces the resistance during drainage and improves work efficiency. According to preliminary estimates, the same model of water pump can save about 10% to 14% of electricity per hour compared with the use of bottom valve.

[0062] (7) The pressure and flow rate have reached the rated values, the water delivery time has been greatly shortened, and the work efficiency has been greatly improved.

[0063] In the utility model, the overall structure is simple and reliable, the cost is low, and the maintenance requirement is low; moreover, the working efficiency of the water pump is improved, the power consumption is reduced, the occurrence of failures and the subsequent operating costs are reduced; a filter is provided to prevent debris from entering the self-priming pump, thereby ensuring the overall high availability and further reducing the maintenance requirement; the pipeline resistance can be reduced, the energy consumption of the water pump itself is reduced, the vacuum degree of the water pump suction port is reduced, the occurrence of cavitation during the operation of the water pump is reduced, and the maintenance cost is further reduced.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0066] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A self-priming pump bottomless valve automatic vacuum siphon suction device, characterized in that: It comprises a water tank (1), wherein the upper portion of the outer side of the water tank (1) is connected to a water suction pipe (2) extending into a sedimentation tank (100); the lower portion of the outer side of the water tank (1) is connected to an inlet end of a self-priming pump (3); It also includes: a liquid level meter (4) arranged in the sedimentation tank (100), and a flow meter (5) arranged at the outlet end of the self-priming pump (3); The liquid level meter (4) and flow meter (5) are communicatively connected to the DCS cabinet.

2. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 1 is characterized in that: A filter screen (6) is provided at the upper inner portion of the water tank (1).

3. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 1, characterized in that: The top of the water tank (1) is provided with an inspection opening, and a top cover (7) is provided on the inspection opening.

4. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 3 is characterized in that: The top cover (7) is provided with an exhaust and water-adding ball valve (8).

5. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 1, characterized in that: An electronic liquid level meter is provided inside the water tank (1) and is communicatively connected to the DCS cabinet.

6. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 1, characterized in that: A water inlet pipe (11) is provided at an upper position on the outer side of the water tank (1); A flange is provided at the end of the water inlet pipe (11) and is detachably connected to the water suction pipe (2).

7. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 1, characterized in that: A water outlet (12) is provided at a lower position on one side of the water tank (1); The water outlet (12) is provided with a flange which is detachably connected to an inlet pipe (31) of the self-priming pump (3).

8. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 1, characterized in that: A valve and a pressure gauge (9) are provided on the outlet pipe (32) of the self-priming pump (3).

9. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 1, characterized in that: The main body of the water tank (1) is a DN700 pipe; a plug is provided at the bottom of the main body, and a flange blind plate is provided at the top to form an inspection port and a top cover (7).

10. The self-priming pump bottomless valve automatic vacuum siphon suction device according to claim 1, characterized in that: The DCS cabinet is communicatively connected to the computer.

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