CN114893449A - Water-irrigation-free bottomless valve cavitation eliminating device and system suitable for coal mine underground water pump - Google Patents
Water-irrigation-free bottomless valve cavitation eliminating device and system suitable for coal mine underground water pump Download PDFInfo
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- CN114893449A CN114893449A CN202210585303.9A CN202210585303A CN114893449A CN 114893449 A CN114893449 A CN 114893449A CN 202210585303 A CN202210585303 A CN 202210585303A CN 114893449 A CN114893449 A CN 114893449A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/16—Pumping installations or systems with storage reservoirs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/02—Self-priming pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a water-irrigation-free bottomless valve cavitation elimination device and system for a coal mine underground water pump, which comprise a negative pressure water storage tank and a negative pressure water inlet pipe, wherein the top or the bottom of the negative pressure water storage tank is optionally provided with a water inlet, the first end of the negative pressure water inlet pipe extends below the liquid level of a lower water bin, the second end of the negative pressure water inlet pipe is communicated with the water inlet, one side of the lower end of the negative pressure water storage tank is provided with a water outlet, and the top end of the negative pressure water storage tank is provided with a liquid supplementing pipe and an exhaust pipe. The invention leads the water suction level of the water pump, the liquid level in the device is always higher than the plane of the water pump, the cavitation allowance of the water pump device is improved, and the harm of cavitation phenomena to the water pump is reduced or eliminated. The cavity is filled with liquid all the time before the water pump is started, irrigation is not needed, a vacuum pump and a jet pump can be omitted, the control flow is optimized, meanwhile, a bottom valve is omitted, the potential safety hazard that the bottom valve is damaged and can not be irrigated and the bottom valve is maintained is eliminated, and the purpose of quick starting and safe operation of the water pump is achieved.
Description
Technical Field
The invention relates to the technical field of water pump cavitation and hydromechanics, in particular to a water-irrigation-free bottomless valve cavitation eliminating device and system suitable for a coal mine underground water pump.
Background
The coal mine safety production has four major elements, which are commonly called as four major elements of a coal mine: lifting, ventilating, draining and pressing wind. Therefore, the drainage system is very important for the safe production of the coal mine. The coal mine drainage equipment is a centrifugal water pump, the water pump is usually arranged above a water sump, a water inlet pipe of the water pump and a pump cavity are filled with water before starting, and the water pump can enter an operating state, otherwise, the water pump cannot absorb water when rotating, dry burning is formed, and the service life of the water pump is seriously influenced. The water pump is started each time, the water is filled, the operation is usually completed by a jet pump or a vacuum pump, the operating principles of the jet pump or the vacuum pump are different, but the working cavity of the water pump can reach certain vacuum degree, water is sucked into the working cavity of the water pump and a water suction pipe, and the normal starting of the water pump is ensured. In order to prevent water in the water suction pipe from flowing backwards when the water pump stops, a bottom valve is usually installed at the bottom of the water suction pipe, so that the working efficiency of a vacuum pump and a jet pump is improved, the irrigation time is shortened, and meanwhile, manual irrigation can be realized when the vacuum pump and the jet pump are in failure. Therefore, the vacuum pump and the jet pump are important devices for assisting the starting of the water pump. However, this control method also has the following problems:
1) because the water pump has the problems of packing leakage, aging seal, incompact seal and the like, the vacuum pump and the jet pump can not form vacuum on the pump cavity, so that the water pump can not inject water or the water injection time is too long, and the water pump can not work normally.
2) Because the water pump is usually arranged several meters above the water surface, the cavitation allowance of the water pump is small, the pressure of a water inlet is smaller than that of a water outlet when the water pump runs, the cavitation phenomenon can be generated in a water pump cavity, the impact pressure generated by the cavitation phenomenon easily enables the surface of the impeller to be stripped, the dynamic balance of the impeller is damaged, the vibration and the noise can be generated when the impeller runs, the working efficiency and the service life of the water pump are reduced, and the safe running of the water pump is influenced.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a water-irrigation-free bottomless valve cavitation elimination device and system for a coal mine underground water pump.
The invention aims to provide a water-irrigation-free bottomless valve cavitation eliminating device for a coal mine underground water pump, which adopts the following technical scheme: the negative pressure water storage tank is optionally provided with a water inlet at the top or the bottom, a first end of the negative pressure water inlet pipe extends below the liquid level of the lower water bin, a second end of the negative pressure water inlet pipe is communicated with the water inlet, and when the water inlet is arranged at the bottom of the negative pressure water storage tank, the second end of the negative pressure water inlet pipe extends from the bottom of the tank to the top of the tank; a water outlet is formed in one side of the lower end of the negative pressure water storage tank and is communicated with a water inlet of the water pump through a water outlet pipe; the top of negative pressure water storage tank is equipped with moisturizing pipe and blast pipe, moisturizing pipe and moisturizing mechanism intercommunication, be used for to moisturizing in the negative pressure water storage tank, the blast pipe is used for outwards exhausting, be equipped with level sensor on the negative pressure water storage tank, be used for detecting water level in the negative pressure water storage tank.
As an optimized scheme, the liquid supplementing pipe comprises an automatic water supplementing pipe and a manual water supplementing pipe, an electric water supplementing valve is arranged on the automatic water supplementing pipe, a manual water supplementing valve is arranged on the manual water supplementing pipe, and the tail ends of the automatic water supplementing pipe and the manual water supplementing pipe are communicated through a first tee piece and are communicated with a water feeding pipe of the water supplementing mechanism.
As an optimized scheme, the exhaust pipe comprises an automatic exhaust pipe and a manual exhaust pipe, an electric exhaust valve is arranged on the automatic exhaust pipe, a manual exhaust valve is arranged on the manual exhaust pipe, and the tail ends of the automatic exhaust pipe and the manual exhaust pipe are communicated through a second three-way piece and can exhaust outwards.
As an optimized scheme, a water level sensor is arranged on the negative-pressure water storage tank.
As an optimized scheme, a negative pressure sensor is arranged on the negative pressure water storage tank.
As an optimized scheme, a flow sensor is arranged on the water outlet pipe.
As an optimized scheme, a flow sensor is arranged on the negative-pressure water storage tank.
As an optimized scheme, a drain outlet is arranged on the negative pressure water storage tank and is optionally arranged on the side surface of the negative pressure water storage tank or at the bottom of the negative pressure water storage tank.
As an optimized scheme, the negative pressure water storage tank is provided with a sewage draining outlet, and the sewage draining outlet is optionally arranged on the side face or the bottom of the negative pressure water storage tank.
As an optimized scheme, a manual drain valve is arranged on the bottom plate of the negative pressure water storage tank.
The invention also aims to provide a water-free bottom-valve-free cavitation eliminating system suitable for the coal mine underground water pump, which comprises the water-free bottom-valve-free cavitation eliminating device suitable for the coal mine underground water pump.
Compared with the prior art, the invention has the advantages that:
the invention relates to a non-filling bottomless valve cavitation eliminating device for a coal mine underground water pump, which leads the water absorbing level of the water pump, and the liquid level in the device is always higher than the plane of the water pump, thereby improving the cavitation allowance of the water pump device and reducing or eliminating the harm of cavitation phenomena to the water pump. The cavity is filled with liquid all the time before the water pump is started, irrigation is not needed, a vacuum pump and a jet pump can be omitted, the control flow is optimized, meanwhile, a bottom valve is omitted, the potential safety hazard that the bottom valve is damaged and can not be irrigated and the bottom valve is maintained is eliminated, and the purpose of quick starting and safe operation of the water pump is achieved.
The invention is suitable for the irrigation-free bottomless valve cavitation elimination system of the coal mine underground water pump, can effectively and automatically control the operation of the irrigation-free bottomless valve cavitation elimination device of the coal mine underground water pump in real time, and realizes the accurate control of the internal liquid level of the negative pressure water storage tank in each stage.
Drawings
FIG. 1 is a right side view of an embodiment of the invention, which is suitable for a water-irrigation-free bottomless valve cavitation elimination device of a coal mine underground water pump;
FIG. 2 is a left side view of an embodiment of the water-irrigation-free bottomless valve cavitation elimination device for the coal mine underground water pump according to the invention;
FIG. 3 is a front view of an embodiment of the invention suitable for a water-filling-free bottomless valve cavitation elimination device of a coal mine underground water pump;
FIG. 4 is a top view of an embodiment of the present invention for a water-filling-free bottomless valve cavitation elimination device for a coal mine downhole water pump;
FIG. 5 is a cross-sectional view of another embodiment of the water-filling-free bottomless valve cavitation elimination device for the coal mine underground water pump according to the present invention;
wherein, 1-negative pressure water storage tank, 2-negative pressure water inlet pipe, 3-water inlet, 4-water outlet pipe, 5-water pump, 6-liquid supplement pipe, 7-exhaust pipe, 8-first tee piece, 9-second tee piece, 10-water level sensor, 11-negative pressure sensor, 12-flow sensor, 13-sewage outlet, 14-manual drain valve,
61-automatic water supply pipe, 62-manual water supply pipe, 63-electric water supply valve, 64-manual water supply valve,
71-automatic exhaust pipe, 72-manual exhaust pipe, 73-electric exhaust valve, 74-manual exhaust valve.
Detailed Description
Hereinafter, in order to facilitate the technical solution of the present invention for those skilled in the art to understand, further description will be made with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The first embodiment is as follows:
referring to fig. 1-4, the present invention is a schematic structural diagram of a bottomless valve cavitation elimination device for water irrigation free of coal mine downhole water pump, the device includes a negative pressure water storage tank 1 and a negative pressure water inlet pipe 2, the negative pressure water storage tank 1 can be a sealed metal tank, and the shape is not limited to a cylindrical structure. In this embodiment, water inlet 3 has been seted up at its top to negative pressure water storage tank 1, and the first end of negative pressure inlet tube 2 stretches into below the liquid level in sump, and the second end and the 3 intercommunications of water inlet of negative pressure inlet tube 2 for when forming the negative pressure in the jar, to retaining in the negative pressure water storage tank 1. A water outlet is arranged on one side of the lower end of the negative pressure water storage tank 1 and is communicated with a water inlet of a water pump 5 through a water outlet pipe 4. The top of negative pressure water storage tank 1 is equipped with moisturizing pipe 6 and blast pipe 7, and moisturizing pipe 6 communicates with moisturizing mechanism for to moisturizing in the negative pressure water storage tank 1, blast pipe 7 is used for outwards exhausting. Be equipped with level sensor 10 on the negative pressure water storage tank 1, level sensor 10 is used for detecting whether the water level in the negative pressure water storage tank 1 accords with the requirement water level that the water pump starts.
Under the usual state, fluid infusion pipe 6 and blast pipe 7 all are in the closed condition, and this embodiment is in the operation in-process, need to satisfy minimum water level in the negative pressure water storage tank 1 and need be higher than the highest water level in outlet pipe 2 all the time. Therefore before the water pump starts, water level sensor 10 detects the water level condition in the negative pressure water storage tank 1, if the water level is less than the water pump start requirement, opens fluid infusion pipe 6 and blast pipe 7 simultaneously, and fluid infusion pipe 6 passes through moisturizing mechanism, like 1 intracavity moisturizing of supply line for production to negative pressure water storage tank, 1 intracavity of negative pressure water storage tank is gaseous to be passed through blast pipe 7 and outwards discharges. When the water level in the negative pressure water storage tank 1 reaches the starting requirement of the water pump, the liquid supplementing pipe 6 and the exhaust pipe 7 are closed, and the water pump can be started.
After the water pump is started, the water level in the negative pressure water storage tank 1 is rapidly reduced to generate negative pressure in the tank body, and water in the lower water storage bin is pressed into the negative pressure water storage tank 1 through the negative pressure water inlet pipe 2 under the atmospheric pressure, so that continuous water pumping is formed. When the water pump stops operating, the negative pressure in the negative pressure water storage tank 1 is gradually reduced, the water level in the negative pressure water storage tank 1 rises, and the water level stops rising until the internal and external pressure in the tank is consistent.
In this embodiment, the fluid replenishing pipe 6 includes an automatic fluid replenishing pipe 61 and a manual fluid replenishing pipe 62, an electric fluid replenishing valve 63 is disposed on the automatic fluid replenishing pipe 61, a manual fluid replenishing valve 64 is disposed on the manual fluid replenishing pipe 62, and ends of the automatic fluid replenishing pipe 61 and the manual fluid replenishing pipe 62 are communicated through a first tee 8 and are communicated with a water supply pipe of the fluid replenishing mechanism. The embodiment is respectively provided with the automatic water replenishing pipe 61 and the manual water replenishing pipe 62 as standby, automatic starting or manual starting can be selected according to actual requirements, and site construction is facilitated.
Similarly, the exhaust pipe 7 includes an automatic exhaust pipe 71 and a spare manual exhaust pipe 72, the automatic exhaust pipe 71 is provided with an electric exhaust valve 73, the manual exhaust pipe 72 is provided with a manual exhaust valve 74, and the ends of the automatic exhaust pipe 71 and the manual exhaust pipe 72 are communicated through a second three-way member 9 and can exhaust air to the outside.
In this embodiment, be equipped with negative pressure sensor 11 on the negative pressure water storage tank 1, negative pressure sensor 11 is used for detecting the negative pressure value in the negative pressure water storage tank 1, prevents that 1 internal seal of negative pressure water storage tank is not in place, causes the device malfunctioning, influences the water pump normal use.
In this embodiment, be equipped with flow sensor 12 on outlet pipe 2, flow sensor 12 is used for detecting outlet pipe 2 mesolow, and the flow is low excessively, then explains that negative pressure water storage tank 1 water level is lower, then causes water pump "dry combustion method" easily, and flow sensor 12 detects when the water pump moves, does not detect when the water pump stops.
In this embodiment, the negative pressure water storage tank 1 is provided with a sewage draining outlet 13, and the sewage draining outlet 13 is optionally arranged on the side surface or the bottom of the negative pressure water storage tank 1. The drain outlet 13 is used for the internal maintenance of the negative pressure water storage tank 1 and discharging sludge or foreign matters in the negative pressure water storage tank 1.
In the embodiment, a manual drainage valve 13 is further provided, and the manual drainage valve 13 is used for draining accumulated water in the negative pressure water storage tank 1, so that the internal maintenance and the position movement of the negative pressure water storage tank 1 are facilitated.
To sum up, this device simple structure has not only improved the reliability of water pump operation, and has the significance to coal mine safety in production, because fill with water all the time in this device, the liquid level of water is higher than the highest liquid level of water pump all the time, so fill with liquid in the cavity all the time before the water pump starts, need not vacuum pump, jet pump evacuation to the water pump before starting, also need not the bottom valve and prevent to irritate the water refluence. Meanwhile, the liquid plane in the device is higher than the water pump plane, so that the cavitation allowance of the water pump device is improved, the harm of cavitation phenomena to the water pump is effectively overcome, and the service life and the working efficiency of the water pump are improved.
Example two:
referring to fig. 5, a cross-sectional view of another embodiment of the invention is shown, which is suitable for a coal mine underground water pump irrigation-free bottomless valve cavitation elimination apparatus, and the main difference between the embodiment and the first embodiment is that in the embodiment, a water inlet 3 of a negative pressure water storage tank 1 is arranged at the bottom of the tank, and after a negative pressure water inlet pipe 2 is communicated with the water inlet 3, a second end of the negative pressure water inlet pipe 2 extends from the bottom of the tank to the top of the tank. Under the condition, the water in the lower water bin can be extracted into the tank body by effectively utilizing the negative pressure formed in the negative pressure water storage tank 1, so that the effect of continuously pumping water is formed.
The invention further provides a water-irrigation-free bottomless valve cavitation elimination system suitable for the coal mine underground water pump, which comprises the first embodiment or the second embodiment, so that the aim of the invention is better achieved. The invention is suitable for a water-irrigation-free bottomless valve cavitation elimination system of a coal mine underground water pump, and can adopt a PLC-touch screen automatic control system and a power control module to carry out program control on the device, wherein the PLC-touch screen automatic control system is electrically connected with each control valve and a sensor in the device and is used for monitoring and controlling the automatic operation of the device. The whole treatment process does not need human intervention, completely realizes unattended operation, can effectively and automatically control the operation of the irrigation-free bottomless valve cavitation elimination device suitable for the coal mine underground water pump in real time, realizes the accurate control of the internal liquid level of the negative pressure water storage tank in each stage, meets the requirements of digital coal mine construction, and realizes the economic purposes of reducing the number of people and improving the efficiency.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (8)
1. The irrigation-free bottomless valve cavitation elimination device for the coal mine underground water pump is characterized by comprising a negative pressure water storage tank (1) and a negative pressure water inlet pipe (2), wherein a water inlet (3) is optionally formed in the top or the bottom of the negative pressure water storage tank (1), the first end of the negative pressure water inlet pipe (2) extends below the liquid level of a lower water sump, the second end of the negative pressure water inlet pipe (2) is communicated with the water inlet, and when the water inlet (3) is formed in the bottom of the negative pressure water storage tank (1), the second end of the negative pressure water inlet pipe (2) extends from the bottom of the tank to the top of the tank; a water outlet is formed in one side of the lower end of the negative pressure water storage tank (1) and is communicated with a water inlet of a water pump (5) through a water outlet pipe (4); a liquid supplementing pipe (6) and an exhaust pipe (7) are arranged at the top end of the negative pressure water storage tank (1), the liquid supplementing pipe (6) is communicated with a water supplementing mechanism and used for supplementing water into the negative pressure water storage tank (1), and the exhaust pipe (7) is used for exhausting air outwards; and a water level sensor (10) is arranged on the negative pressure water storage tank (1) and is used for detecting the water level in the negative pressure water storage tank (1).
2. The device for eliminating the bottomless valve cavitation without water filling of the coal mine underground water pump according to claim 1, characterized in that the water filling pipe (6) comprises an automatic water filling pipe (61) and a manual water filling pipe (62), an electric water filling valve (63) is arranged on the automatic water filling pipe (61), a manual water filling valve (64) is arranged on the manual water filling pipe (62), and the tail ends of the automatic water filling pipe (61) and the manual water filling pipe (62) are communicated through a first tee joint (8) and are communicated with a water supply pipe of the water filling mechanism.
3. The water irrigation free bottomless valve cavitation eliminating device suitable for the coal mine underground water pump according to claim 1 or 2, characterized in that the exhaust pipe (7) comprises an automatic exhaust pipe (71) and a manual exhaust pipe (72), an electric exhaust valve (73) is arranged on the automatic exhaust pipe (71), a manual exhaust valve (74) is arranged on the manual exhaust pipe (72), and the tail ends of the automatic exhaust pipe (71) and the manual exhaust pipe (72) are communicated through a second tee joint (9) and can exhaust outwards.
4. The device for eliminating the cavitation of the bottomless valve without the water filling of the coal mine underground water pump according to claim 3, characterized in that a negative pressure sensor (11) is arranged on the negative pressure water storage tank (1).
5. The water irrigation free bottomvalve cavitation elimination device suitable for the coal mine underground water pump according to claim 4, characterized in that a flow sensor (12) is arranged on the water outlet pipe (2).
6. The device for eliminating the cavitation of the bottomless valve suitable for the water filling free of the coal mine underground water pump as claimed in claim 5, characterized in that the negative pressure water storage tank (1) is provided with a sewage draining outlet (13), and the sewage draining outlet (13) is optionally arranged on the side or the bottom of the negative pressure water storage tank (1).
7. The device for eliminating the cavitation of the bottomless valve without the water filling of the coal mine underground water pump according to claim 6, characterized in that a manual drain valve (14) is arranged on a bottom plate of the negative pressure water storage tank (1).
8. The irrigation-free bottomless valve cavitation elimination system suitable for the coal mine underground water pump is characterized by comprising the irrigation-free bottomless valve cavitation elimination device suitable for the coal mine underground water pump, as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210585303.9A CN114893449A (en) | 2022-05-26 | 2022-05-26 | Water-irrigation-free bottomless valve cavitation eliminating device and system suitable for coal mine underground water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210585303.9A CN114893449A (en) | 2022-05-26 | 2022-05-26 | Water-irrigation-free bottomless valve cavitation eliminating device and system suitable for coal mine underground water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114893449A true CN114893449A (en) | 2022-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210585303.9A Pending CN114893449A (en) | 2022-05-26 | 2022-05-26 | Water-irrigation-free bottomless valve cavitation eliminating device and system suitable for coal mine underground water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114893449A (en) |
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2022
- 2022-05-26 CN CN202210585303.9A patent/CN114893449A/en active Pending
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