CN105582724B - Filtration system before a kind of self-cleaning pump - Google Patents

Abstract

The invention discloses a filter system in front of a self-cleaning pump. A decelerating motor is fixed on the bottom plate of a floating boat through a motor bracket. One side of the output shaft of the decelerating motor is connected with a rotating shaft through a transmission mechanism. The rotating shaft penetrates through the bottom plate of the floating boat and extends through a sealing device. To the outside of the pontoon, the sealing cylinder is sealed and fixed on the lower part of the pontoon relative to the rotating shaft. The sealing cylinder is divided into a water inlet chamber and an outlet chamber by a secondary filter, and the bottom of the water inlet chamber is connected to the outside world through a primary filter. The water source is connected, and the rotating shaft inside the water inlet chamber is provided with a brush fixing frame, and a brush matching the inner edge of the secondary filter is arranged on the brush fixing frame. The pipe is connected with the inlet of the sewage suction pump, and the water outlet chamber is connected with the water inlet of the water pump through the water inlet pipe of the water pump. The invention has the advantages of small size, no occupation of cultivated land, simple connection, no backwash sewage loss and no water head loss in post-pump filtration.

Description

A self-cleaning pre-pump filter system

technical field

The invention belongs to the technical field of pre-filtering systems for micro-irrigation pumps, and in particular relates to a pre-filtering system for self-cleaning pumps.

Background technique

The reasonable configuration of the filter system at the head of the micro-irrigation system plays a vital role in the normal operation of the entire micro-irrigation system. If the filter equipment is not matched or selected properly, it will cause the paralysis of the entire micro-irrigation system, so it is necessary to choose scientifically and reasonably First filter system. At present, the filters used in the field of agricultural irrigation mainly include laminated filters, sand filters, centrifugal filters, mesh filters and self-cleaning filters. In applications, these types of filters are often used according to different water quality. Used in combination to remove different impurities and organic matter in water sources. However, the common feature of these filters is that they belong to post-pump filtration. After the pump pressurizes the water flow, it enters the filter for filtration. The problem is that the filter itself will block the water flow, resulting in head loss. Among them, the water head loss of the most widely used gravel filter can reach 10 meters. These losses will increase the supporting power of the water pump and increase the operating cost. At the same time, the most critical issue of the filtration system is the cleaning after filtration. Cleaning after clogging is performed by backwashing with clean water, and the sewage generated by backwashing will cause a quarter of water waste, reducing filtration efficiency and water utilization. Moreover, the traditional filtration system has a large footprint, many connecting pipes, complicated installation and maintenance, and is not conducive to recycling and storage.

Contents of the invention

In order to overcome the shortcomings of the prior art, the invention provides a self-cleaning pre-pump filter system with small footprint and convenient and simple connection.

In order to solve the above technical problems, the present invention adopts the following technical scheme, a self-cleaning pump pre-filtration system, which is characterized in that it includes a pontoon, the upper part of the pontoon is provided with a sewage suction pump and a deceleration motor, and the lower part of the pontoon is provided with a sealing cylinder and a primary filter. and the secondary filter, the deceleration motor is fixed on the bottom of the pontoon through the motor bracket, one side of the output shaft of the deceleration motor is connected to the rotating shaft through the transmission mechanism, and the rotating shaft penetrates the bottom of the pontoon through the sealing device and extends to the outside of the pontoon. The body seal is fixed at the lower part of the pontoon relative to the rotating shaft. The sealing cylinder is divided into a water inlet chamber and a water outlet chamber by a secondary filter. The bottom of the water inlet chamber communicates with the external water source through a primary filter. There is a brush fixing frame on the rotating shaft, and a brush matching the inner edge of the secondary filter is set on the brush fixing frame. The top of the water inlet chamber is connected to the inlet of the sewage suction pump through a sealed sewage suction pipe that runs through the bottom plate of the pontoon. , the outlet of the sewage suction pump is connected to the impurity collection network through the sewage pipe, the water outlet chamber is connected to the water inlet of the pump through the water inlet pipe of the water pump, and the water outlet of the water pump is connected to the water outlet pipe of the water pump.

Further preferably, the secondary filter is a sintered mesh, a wedge-shaped filter cartridge made of 304 steel or a wedge-shaped filter cartridge made of 316 steel.

Further preferably, the water pump is arranged on the pontoon or on the shore.

The present invention combines the self-cleaning filter and the floating water pump to realize the filter after the pump is changed to the filter before the pump, and the device is floating on the water surface, and can be applied to rivers, lakes, reservoirs, ponds and reservoirs, etc. This kind of water source has the advantages of small size, no occupation of farmland, simple connection, no backwash sewage loss and no water head loss after pump filtration, etc. It can maximize the head of the water pump and is suitable for ordinary water-saving irrigation systems. and emergency drought relief systems.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Drawing description: 1. Sewage suction pump, 2. Geared motor, 3. Rotary shaft, 4. Motor bracket, 5. Water pump, 6. Floating boat, 7. Water pump outlet pipe, 8. Water pump inlet pipe, 9. Sealing device, 10. Sewage suction pipe, 11. Impurity collection net, 12. Seal cylinder, 13. Secondary filter, 14. Brush holder, 15. Primary filter, 16. Brush.

detailed description

The technical scheme of the present invention is described in detail in conjunction with the accompanying drawings. A self-cleaning pump pre-filter system, comprising a floating boat 6, the upper part of the floating boat 6 is provided with a sewage suction pump 1 and a deceleration motor 2, and the lower part of the floating boat 6 is provided with a sealing cylinder 12, a primary filter screen 15 and a secondary filter screen 13, and the deceleration The motor 2 is fixed on the bottom plate of the pontoon 6 through the motor bracket 4, and one side of the output shaft of the reduction motor 2 is connected to the rotating shaft 3 through a transmission mechanism, and the rotating shaft 3 penetrates the bottom plate of the pontoon 6 through a sealing device 9 and extends to the outside of the pontoon 6 The sealing cylinder 12 is sealed and fixed at the position opposite to the rotating shaft 3 at the lower part of the pontoon 6. The sealing cylinder 12 is divided into a water inlet chamber and a water outlet chamber by a secondary filter 13, wherein the bottom of the water inlet chamber passes through a primary filter 15 and a water outlet. The external water source is connected, the rotating shaft 3 inside the water inlet chamber is provided with a brush holder 14, and the brush holder 14 is provided with a brush 16 matching the inner edge of the secondary filter screen 13, and the top of the water inlet chamber is sealed The sewage suction pipe 10 running through the bottom plate of the pontoon 6 is connected to the inlet of the sewage suction pump 1, the outlet of the sewage suction pump 1 is connected to the impurity collection network 11 through the sewage discharge pipe, the water outlet chamber is connected to the water inlet of the water pump 5 through the water pump inlet pipe 8, and the water outlet of the water pump 5 Connect with water pump outlet pipe 7. The secondary filter screen 13 is a sintered mesh, a wedge-shaped filter cartridge made of 304 steel or a wedge-shaped filter cartridge made of 316 steel. The water pump 5 is arranged on the pontoon 6 or on the shore.

During the operation of the present invention, the pontoon is placed in water to float on the water surface, the outlet pipe of the water pump is connected with the pipe network on the shore, the power supply pipeline is laid together with the outlet pipe of the water pump, and the control cabinet can be arranged on the shore. After the water pump is started, the water starts to be pumped, and the water first passes through the primary filter to filter the large particles of impurities. In actual use, try to ensure that pre-filtration facilities such as trash racks and grit chambers are installed upstream to reduce the filtration load of the filtration device. After the water is filtered by the secondary filter, it enters the sealed cylinder outside the secondary filter. The secondary filter can use a wedge-shaped mesh cylinder. The wedge-shaped mesh cylinder has the advantages of compact structure, strong pressure bearing capacity, and easy cleaning. The wedge-shaped mesh is welded with mesh wire, and the cross-section of the mesh wire is trapezoidal in shape. When used for this filtration, the long side of the trapezoid should be located inside. According to the requirements of filtration accuracy, select the appropriate mesh number of the filter. The impurities are trapped inside the secondary filter, and the filtered water passes through the secondary filter and enters the cavity between the outer sealing cylinder and the secondary filter, and then enters the water inlet pipe of the water pump. Provide water that meets irrigation requirements.

When the impurities inside the secondary filter accumulate more and more, the water passing capacity will be affected, and the pressure difference between the inside and outside of the secondary filter increases, and when it reaches a certain level, it needs to be cleaned. The cleaning frequency can be cleaned according to the signal of the differential pressure sensor, or a fixed time can be determined by summarizing according to the water quality, and the cleaning will be automatically started after filtering for a certain period of time. After the control cabinet sends the signal to the deceleration motor, the deceleration motor starts to drive the rotation shaft to rotate, the rotation shaft is connected to the brush holder with the brush fixed, the brush starts to rotate, and the brush contacts the inner surface of the secondary filter to clean the surface Accumulated impurities are brushed away. When the deceleration motor starts, the sewage suction pump also starts, and the impurities washed off by the brush together with the water are discharged into the impurity collection net connected behind the pipeline through the sewage suction pipe. The mesh number of the impurity collection mesh is smaller than that of the fine filter mesh as far as possible, and the collection mesh can retain and collect the impurities so as not to re-enter the water body, reducing the repeated filtration load. Neither the sewage suction pump nor the deceleration motor needs too much power to meet the power required for sewage discharge and brush rotation. The working water pump can not be placed on the ship, or can be fixed somewhere on the shore, and the water pump inlet pipe can be connected with the water pump inlet to get final product.

The basic principles, main features and advantages of the present invention have been shown and described above. On the premise of not departing from the spirit and scope of the present invention, the present invention also has various changes and improvements, and these changes and improvements all fall into the claimed invention. range.

Claims (3)

1. A method for realizing a self-cleaning pump pre-filter system, characterized in that: the floating boat is placed in the water and floats on the water surface, the water pump outlet pipe is connected with the shore pipe network, the power supply pipeline is laid together with the water pump outlet pipe, and the control The cabinet is set on the bank, and after starting the water pump, it starts to pump water. The water first passes through the first-level filter to filter the large particles of impurities. In actual use, a trash rack or a pre-filtration facility for the grit chamber is installed upstream to reduce the filter device. The filtration load, the water enters the sealed cylinder outside the secondary filter after being filtered by the secondary filter. The secondary filter uses a wedge-shaped mesh cylinder, and the wedge-shaped mesh is welded with mesh wire. When used for this filtration, the long side of the trapezoid should be located on the inner side. According to the requirements of filtration accuracy, select the appropriate mesh size of the filter, the impurities will be trapped inside the secondary filter, and the filtered water will pass through the secondary filter and enter the outer sealing cylinder. and the cavity between the secondary filter, and then enters the water inlet pipe of the water pump. After the water pump is pressurized, it provides water that meets the irrigation requirements for the field pipe network; when the impurities inside the secondary filter accumulate more and more, the water passing capacity It will cause an impact. The pressure difference between the inside and outside of the secondary filter increases. When it reaches a certain level, it needs to be cleaned. The cleaning frequency is based on the signal of the pressure difference sensor. After the motor signal, the deceleration motor starts to drive the rotating shaft to rotate. The rotating shaft is connected to the brush holder with the brush fixed, and the brush starts to rotate. The brush contacts the inner surface of the secondary filter, and the impurities accumulated on the surface can be brushed away. Wash off, when the deceleration motor starts, the sewage suction pump also starts, and the impurities washed off by the brush together with the water are discharged through the sewage suction pipe into the impurity collection net connected behind the pipeline. The impurity collection mesh is smaller than the fine filter mesh The number of impurities is retained and collected. The filter system before the self-cleaning pump includes a pontoon. The upper part of the pontoon is equipped with a sewage suction pump and a deceleration motor. The lower part of the pontoon is provided with a sealed cylinder, a primary filter and a secondary filter. The motor bracket is fixed on the bottom of the pontoon, and one side of the output shaft of the deceleration motor is connected to the rotating shaft through the transmission mechanism. The rotating shaft passes through the bottom of the pontoon through the sealing device and extends to the outside of the pontoon. In the relative position of the shaft, the sealing cylinder is divided into a water inlet chamber and a water outlet chamber by a secondary filter. The bottom of the water inlet chamber communicates with the external water source through a primary filter. There is a brush on the rotating shaft inside the water inlet chamber. The fixed frame is provided with a brush that matches the inner edge of the secondary filter. The top of the water inlet chamber is connected to the inlet of the sewage suction pump through a sewage suction pipe that is sealed and penetrates the bottom plate of the floating boat. The outlet of the sewage suction pump is passed through a sewage discharge pipe. It is connected with the impurity collection net, the water outlet chamber is connected with the water inlet of the water pump through the water inlet pipe of the water pump, and the water outlet of the water pump is connected with the water outlet pipe of the water pump. 2. The realization method according to claim 1, characterized in that: the secondary filter screen is a sintered screen, a wedge-shaped filter cartridge made of 304 steel or a wedge-shaped filter cartridge made of 316 steel. 3. The realization method according to claim 2, characterized in that: the water pump is set on the floating boat or on the shore.