Underground filtering and water taking device with backwashing function for surface water in shallow water area

Abstract

The invention discloses a shallow water area surface water underground filtering and water taking device with backwashing, which comprises a component main body, an on-off assembly, a filtering assembly, a backwashing assembly and a water taking assembly, the interior of the component main body is divided into an upper backwashing cavity and a lower water collecting cavity through a partition plate; the on-off assembly is arranged on the partition plate and is used for controlling connection or disconnection between the backwashing cavity and the water collecting cavity; the filtering assembly is arranged on the backwashing cavity, is communicated to the top of the component main body and is used for filtering surface water into the backwashing assembly cavity; the back-flushing assembly is arranged in the back-flushing cavity and is used for injecting water into the back-flushing cavity. Through the suction force of the water taking assembly and the gravity effect of river water, surface water flowing through the upper portion of the component body is filtered through the filtering assembly, and therefore the purpose of efficiently taking water from shallow surface water is achieved; under the cooperation of the backflushing assembly and the on-off assembly, after the filtering flow is reduced, backflushing cleaning of the filtering assembly is formed in a backflushing mode, and the workload of manual maintenance is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of surface water heat pump systems, and in particular to a shallow water surface water underground filtering and water intake device with backwashing. Background Art

[0002] The water source heat pump system is a heat pump system that uses water as a cold and hot source to extract energy for heating and cooling. Compared with the currently widely used air source heat pump and gas boiler systems, it has the characteristics of high efficiency and energy saving, stable operation, environmental benefits, and multiple uses of one machine. For example, Chinese patent 202021359750.5 discloses a water source heat pump system, including a heat pump and a water tank, and the water tank has a left water storage chamber and a right water storage chamber. Therefore, in areas with abundant water resources, the construction of a water source heat pump system to supply energy to buildings can replace the current mainstream air-conditioning system with low energy efficiency, which can greatly reduce building energy consumption; and efficient water extraction technology in shallow water areas is a key technology for promoting the application of water source heat pump systems for cooling and heating.

[0003] It is difficult to set up water intake facilities in shallow water areas. Due to the water pressure disturbance at the water intake, the water intake is prone to sand and mud, resulting in substandard water quality. Setting up a separate reservoir requires occupying the surrounding area of ​​the water area, the water environment, and even digging deep diversion at the bottom of the water area, which has a great impact on the ecology of the surface water area. The reservoir also faces the problem of siltation. Therefore, how to efficiently extract water from shallow surface water and reduce construction and maintenance costs is a major obstacle to the development of surface water source heat pumps. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and propose a shallow water surface water underground filtering and water extraction device with backwashing to solve the technical problem of how to efficiently extract surface water at a shallow water level in the prior art.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a shallow water surface water underground filtering and water taking device with backwashing, comprising: The main body of the component is divided into an upper backwash chamber and a lower water collection chamber by a partition; A switch assembly is arranged on the partition plate and is used to control the connection or blocking between the backwash chamber and the water collection chamber; A filter assembly is disposed on the backwash chamber and connected to the top of the component body, and is used to filter surface water into the backwash assembly chamber; A backwashing assembly is disposed in the backwashing chamber and is used to inject water into the backwashing chamber to backwash the filter assembly; and The water intake component is arranged in the water collecting chamber and is used to extract the surface water filtered by the filtering component.

[0006] In some embodiments, the on-off assembly includes a water gate and an elastic telescopic part. A through opening is opened on the partition, and the water gate is hinged in the through opening. One end of the elastic telescopic part is connected to the inner wall of the water collecting chamber, and the other end is connected to the bottom of the water gate, which is used to elastically support the water gate so that the through opening is in a normally open state, and has a state in which the water gate closes the through opening when the water gate is pressed down to be compressed.

[0007] In some embodiments, a water collection pit is provided in the water collection cavity, and a water diversion wall with a slope is provided in the water collection cavity. The water diversion wall is located below the through opening and is used to guide water to flow into the water collection pit.

[0008] In some embodiments, the water intake assembly includes a water intake pipe, which is installed in the sump. The head of the water intake pipe is provided with a bell mouth, and the head of the bell mouth is provided with a filter.

[0009] In some embodiments, the backwash assembly includes a backwash pipe, which is installed in the backwash chamber. The head of the backwash pipe is bent downward at forty-five degrees and faces the top surface of the water gate. During backwashing, the water flow impacts the water gate and presses the water gate down to close the opening.

[0010] In some embodiments, the filter assembly includes a filter cover plate, and the filter cover plate is detachably mounted on the top of the backwash chamber.

[0011] In some embodiments, the top surface of the filter cover plate is inclined downward along the direction of water flow.

[0012] In some embodiments, a boosting plate is provided at the bottom of the water gate, and an assisting pipe facing the boosting plate is also provided on the water collecting chamber for injecting water flow to impact the boosting plate.

[0013] In some embodiments, a water scoop is provided on the top of the power-assisting plate to catch part of the water flow injected by the boosting pipe.

[0014] In some embodiments, the water scoop has a position state in which the scoop opening faces obliquely downward when the water gate is raised, and a position state in which the scoop opening faces obliquely upward when the water gate closes the opening.

[0015] Compared with the prior art, the shallow water surface water underground filtering and water intake device with backwashing provided by the present invention, through the suction force of the water intake component and the gravity of the river water, uses the filtering component to filter the surface water flowing above the component body, so as to achieve the purpose of efficient water intake in the shallow surface water; and through the cooperation of the backwashing component and the on-off component, after the filtering flow rate decreases, the backwashing method is used to backwash the filtering component, thereby reducing the workload of manual maintenance; and the device is buried underground in the water area, with little impact on the water area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the water intake state of the shallow water surface water underground filtering water intake device with backwashing provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the backwash state of the shallow water surface water underground filtering and water intake device with backwashing provided by an embodiment of the present invention; Figure 3 It is a top view of a shallow water surface water underground filtering and water intake device with backwashing provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of an inclined filtering cover plate of a shallow water surface water underground filtering and water intake device with backwashing provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the power-assisted sluice gate closing structure of a shallow water surface water underground filtering and water intake device with backwashing provided in an embodiment of the present invention.

[0017] Description of reference numerals: 1. Component body; 11. Baffle; 101. Backwash chamber; 1101. Through port; 102. Water collecting chamber; 103. Water collecting pit; 104. Water diversion wall; 2. On / off assembly; 21. Water gate; 22. Elastic expansion member; 3. Filter assembly; 31. Filter cover; 4. Backwash assembly; 41. Backwash pipe; 5. Water intake assembly; 51. Water intake pipe; 52. Bell mouth; 6. Power-assisting plate; 601. Flushing-assisting pipe; 602. Water scoop. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problem of how to efficiently extract surface water in shallow water, the present invention provides a shallow water surface water underground filtering and water extraction device with backwashing, which can realize efficient surface water extraction in shallow water.

[0020] It should be noted that the underground filtering and water-taking device for shallow surface water with backwashing described in the present invention is used for but not limited to efficient surface water extraction at shallow water levels. For the convenience of explanation, in the present invention, only the application of the underground filtering and water-taking device for shallow surface water with backwashing to surface water extraction at shallow water levels is used as an example for explanation. The principle of applying the underground filtering and water-taking device for shallow surface water with backwashing to other types of equipment is substantially the same as the principle of applying it to other similar environments, which will not be elaborated here.

[0021] See also Figure 1 , Figure 1 The present invention is a schematic diagram of the water intake state of a shallow water surface water underground filtering and water intake device with backwashing in one embodiment of the present invention. The shallow water surface water underground filtering and water intake device with backwashing includes a component body 1, a switching assembly 2, a filtering assembly 3, a backwashing assembly 4 and a water intake assembly 5. The component body 1 is divided into an upper backwashing chamber 101 and a lower water collecting chamber 102 by a partition 11. The water intake component body 1 can be made of stainless steel, aluminum alloy or concrete structure and other materials with sufficient strength and corrosion resistance; the switching assembly 2 is arranged on the partition 11, and is used to control the connection or blocking between the backwashing chamber 101 and the water collecting chamber 102. When the backwashing chamber 101 is connected to the water collecting chamber 102, it is in the water intake mode, and when the backwashing chamber 101 and the water collecting chamber 102 are blocked, it is Backwash mode: The filter assembly 3 is arranged on the backwash chamber 101 and connected to the top of the component body 1, and is used to filter surface water into the backwash chamber 101. The surface water is filtered by the filter assembly 3, enters the backwash chamber 101, and then flows to the water collection chamber 102; the backwash assembly 4 is arranged in the backwash chamber 101, and is used to inject water into the backwash chamber 101 to backwash the filter assembly 3. In the backwash mode, since the on-off assembly 2 blocks the backwash chamber 101 and the water collection chamber 102, during the water injection process, water will accumulate in the backwash chamber 101 and form a backwash water pressure, which prompts the fluid to penetrate the filter assembly 3 upwards and backwash the filter assembly 3; the water intake assembly 5 is arranged in the water collection chamber 102, and is used to extract the surface water filtered by the filter assembly 3. Through the water intake facilities buried at the bottom of the water area, water is filtered and taken to provide water source for water source heat pump systems, etc. It also has a backwash function. When there is too much sand or mud in the filter area, the filter surface will be backwashed to maintain the smooth operation of the filter channel.

[0022] In one embodiment, see Figure 1 and Figure 2In order to automatically form on-off control during water injection backwashing, the on-off assembly 2 includes a water gate 21 and an elastic telescopic member 22. A through opening 1101 is opened on the partition 11. The water gate 21 is hinged in the through opening 1101. One end of the elastic telescopic member 22 is connected to the inner wall of the water collecting chamber 102, and the other end is connected to the bottom of the water gate 21, which is used to elastically support the water gate 21 so that the through opening 1101 is in a normally open state, and has a state in which the water gate 21 closes the through opening 1101 when the water gate 21 is pressed down to be compressed. The elastic telescopic member 22 can be a spring, and the water gate 21 is limited by the spring arranged below it to maintain a normally open state. During the backwashing operation, the spring is compressed by the backwashing water pressure to close the water gate. The backwash assembly 4 mainly injects water under pressure to pressurize the water gate 21 to compress the spring and close the water gate 21; when the backwash stops, the spring rebounds and props up the water gate 21, thereby connecting the water collection chamber 102 and the backwash chamber 101.

[0023] It can be understood that a water gate is provided on the partition 11 and is kept normally open by a spring. The spring should have sufficient strength, and its theoretical expansion and contraction times should meet the requirements of the water intake project. The water gate can be made of a material with a relatively low material density, and the opening and closing force should not be too large, so that the backwashing water flow can smoothly and quickly close it, and the water gate can be quickly opened after the backwashing is completed. When the water gate is opened, it should be able to fully satisfy the complete passage of filtered water. When the water gate is closed, it should be directly sealed with the partition. The water gate of this embodiment is made of aluminum alloy.

[0024] In one embodiment, see Figure 1 In order to concentrate the water and facilitate extraction, a water collection pit 103 is provided in the water collection chamber 102. A sloped water diversion wall 104 is provided in the water collection chamber 102. The water diversion wall 104 is located below the through opening 1101 and is used to guide water to flow into the water collection pit 103.

[0025] It can be understood that the water diversion wall 104 diverts the filtered water to the sump 103 , and the water intake component 5 takes water from the sump. The depth of the sump should be deep enough to meet the water absorption requirement of the water intake component 5 .

[0026] In one embodiment, see Figure 1 In order to reduce the probability of blockage in the water intake link, the water intake component 5 includes a water intake pipe 51, which is installed in the sump 103. The head of the water intake pipe 51 is provided with a bell mouth 52, and the head of the bell mouth 52 is provided with a filter screen. Under the action of gravity and the suction force of the pipe mouth of the water intake pipe 51, the surface water passes through the filter layer of the filter component 3 into the backwash chamber 101, and then passes through the sluice gate 21 into the water collection chamber 102, and is collected in the sump 103. The pipe mouth of the water intake pipe 51 realizes water intake in the sump.

[0027] It can be understood that the water intake pipe 51 is connected to the water source heat pump water intake system, and the water intake amount should not be less than the water demand of the water source heat pump system. If the water intake amount of a single device is less than the water demand of the water source heat pump system, multiple sets of water intake devices should be set.

[0028] In one embodiment, see Figure 1 The backwash assembly 4 includes a backwash pipe 41, which is installed in the backwash chamber 101. The head of the backwash pipe 41 is bent downward at a forty-five degree angle and faces the top surface of the water gate 21. When used for backwashing, the water gate 21 is impacted by water flow to press the water gate 21 downward to close the opening 1101. The backwash pipe 41 can be connected to the user's pipeline system to backwash the blocked filter cover plate 31 through pressurized water flow.

[0029] It can be understood that when multiple water intake devices are set up, the water for backwashing can be taken from other water intake devices for alternating backwashing; when a single water intake device is used, a water storage device can be set up, and the stored water can be used for backwashing; the backwashing frequency can be achieved by setting a timed backwash, or by setting a liquid level gauge in the water collection chamber. When the liquid level in the water collection chamber is detected to be low, backwashing measures can be taken; the water intake pipe and backwashing can be PE pipe, galvanized steel pipe or seamless steel pipe; the pipe should be made of the same material as the water intake device connector.

[0030] In one embodiment, see Figure 1 The filter assembly 3 includes a filter cover plate 31, which is detachably mounted on the top of the backwash chamber 101. The filter cover plate 31 is arranged on the top of the component body 1 and is located on the top of the riverbed after installation. The filter cover plate 31 is provided with filter material inside. The filter material can be pebbles, coarse sand and other materials. Water inlet holes are arranged on the top and bottom of the cover plate. The filter cover plate 31 is connected to the component body 1 by bolts. When it is necessary to go ashore for maintenance, the connecting bolts can be removed to hoist it ashore.

[0031] It is understandable that the filter material is replaceable and can be selected according to the project's requirements for water quality; the material of the filter cover 31 can be consistent with or inconsistent with the material of the component body, but the contact position between the two should avoid electrochemical corrosion.

[0032] In one embodiment, see Figure 4 The top surface of the filter cover plate 31 is inclined downward along the direction of the water flow, thereby having an inclined surface. Under normal water flow, it can cause debris to slide to the bottom of the slope. At the same time, during the backwashing process, the backwashed debris is also easy to flow along the water flow, reducing the amount of debris that can be enriched thereon.

[0033] In one embodiment, see Figure 5In order to improve the closing stability of the water gate 21 and offset the water pressure fluctuation and impulse fluctuation during the backwashing process, a boosting plate 6 is provided at the bottom of the water gate 21, and a boosting pipe 601 facing the boosting plate 6 is also provided on the water collecting chamber 102, which is used to inject water flow to impact the boosting plate 6. The boosting pipe 601 and the backwashing pipe 41 can use the same water source. The boosting pipe 601 forms a water flow impact on the boosting plate 6, the purpose of which is to accelerate the closing of the water gate 21, increase the downward pressure on the water gate 21, and improve the closing stability of the water gate 21. Especially when the water impact force of the backwashing pipe 41 becomes weak, it serves as an auxiliary downward pressure force for the closing of the water gate 21, offsets the water pressure fluctuation and impulse fluctuation during the backwashing process, and avoids the situation where the water gate 21 may be lifted up by the spring in the middle.

[0034] It is understandable that when the impact force of water injection becomes weaker, if the impact force is less than the supporting elastic force of the spring, the water gate 21 will lift. At this time, if the stored water has not reached a stable pressure, the port will open and water will be discharged, resulting in prolonged recoil start-up time and recoil failure.

[0035] In one of the embodiments, in order to reduce the continuous water injection for assisting flushing, a water scoop 602 is provided on the top of the assisting plate 6 for scooping part of the water flow injected by the assisting flushing pipe 601, thereby forming a gravity effect.

[0036] Furthermore, the water hood 602 has a position state in which the hood opening of the water hood 602 faces obliquely downward when the water gate 21 is lifted, and a position state in which the hood opening of the water hood 602 faces obliquely upward when the water gate 21 closes the passage 1101, wherein the elastic upward thrust of the spring is greater than the sum of the static pressure of the water hood 602 and the water storage in the backwash chamber 101, so that after the water injection into the recoil pipe is stopped, the spring can push up the hood 21; when the hood 21 is closed, the recoil pipe continues to inject water, which acts on the hood, and the hood can be continuously closed. At this time, the hood opening of the water hood 602 faces an obliquely upward position state, which can hold the stored water and does not require continuous water supply; and when the recoil pipe stops injecting water, the sluice gate 21 is lifted, the hood opening of the water hood 602 faces an obliquely downward position state, and the water is automatically discharged.

[0037] In order to better understand the present invention, the following Figures 1 to 5The technical solution of the present invention is described in detail: in the water intake mode, the water gate 21 is opened, and under the action of the water intake pipe 51 and the gravity of the water body, the surface water passes through the filter cover plate 31 and is filtered downward, then enters the backwash chamber 101, passes through the through port 1101, flows into the sump 103 along the water diversion wall 104, and is pumped away by the water intake pipe 51 to the water source pump system for use; in the backwash mode, the backwash pipe 41 injects water into the backwash chamber 101, and under the impact of the water flow, the water gate 21 covers the through port 1101 and gradually accumulates, forming a backwash from bottom to top on the filter cover plate 31, and after the backwash, the water injection of the backwash pipe 41 is stopped, the water pressure in the backwash chamber 101 is reduced, and the elastic telescopic member 22 automatically elastically pushes up the water gate 21, opens the through port 1101, and switches to the position state of the water intake mode.

[0038] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A shallow water surface water underground filtering and water extraction device with backwashing, characterized in that: include: The main body of the component is divided into an upper backwash chamber and a lower water collection chamber by a partition; A switch assembly is arranged on the partition plate and is used to control the connection or blocking between the backwash chamber and the water collection chamber; A filter assembly is disposed on the backwash chamber and connected to the top of the component body, and is used to filter surface water into the backwash assembly chamber; A backwashing assembly is disposed in the backwashing chamber and is used to inject water into the backwashing chamber to backwash the filter assembly; as well as The water intake component is arranged in the water collecting chamber and is used to extract the surface water filtered by the filtering component.

2. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 1 is characterized in that: The on-off assembly includes a water gate and an elastic telescopic part. A through opening is opened on the partition. The water gate is hinged in the through opening. One end of the elastic telescopic part is connected to the inner wall of the water collecting chamber, and the other end is connected to the bottom of the water gate. It is used to elastically support the water gate so that the through opening is in a normally open state, and has a state in which the water gate closes the through opening when the water gate is pressed down to compress it.

3. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 2 is characterized in that: A water collection pit is arranged in the water collection cavity, and a water diversion wall with a slope is arranged in the water collection cavity. The water diversion wall is located below the through opening and is used for guiding water to flow toward the water collection pit.

4. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 3 is characterized in that: The water intake assembly comprises a water intake pipe, which is installed in the sump. The head of the water intake pipe is provided with a bell mouth, and the head of the bell mouth is provided with a filter screen.

5. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 2 is characterized in that: The backwash assembly includes a backwash pipe, which is installed in the backwash chamber. The head of the backwash pipe is bent downward at a forty-five degree angle and faces the top surface of the water gate. During backwashing, the water flow impacts the water gate and presses the water gate downward to close the opening.

6. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 1 is characterized in that: The filter assembly comprises a filter cover plate, and the filter cover plate is detachably mounted on the top of the backwash chamber.

7. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 6 is characterized in that: The top surface of the filter cover plate is inclined downward along the water flow direction.

8. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 2 is characterized in that: A boosting plate is arranged at the bottom of the water gate, and an assisting pipe facing the boosting plate is also arranged on the water collecting chamber for injecting water flow to impact the boosting plate.

9. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 8, characterized in that: A water scoop is provided on the top of the power-assisting plate to scoop up part of the water flow injected by the boosting pipe.

10. The shallow water surface water underground filtering and water extraction device with backwashing according to claim 9, characterized in that: The water scoop has a position state in which the scoop opening of the water scoop faces obliquely downward when the water gate is lifted, and a position state in which the scoop opening of the water scoop faces obliquely upward when the water gate closes the opening.

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