An integrated dust suppression and wastewater recycling device for construction environments

Abstract

This invention relates to the field of spray dust suppression equipment technology, and discloses an integrated spray dust suppression and wastewater recycling device for construction environments. The invention includes an outer casing, a water storage tank, a dual-filter water inlet mechanism, a water supply mechanism, and spray nozzles. The dual-filter water inlet mechanism includes a first delivery pump, a switching valve, two first filters, and a flow-limiting tee pipe. The switching valve switches the path of wastewater into different first filters, achieving automatic alternation between filtration and backwashing; the flow-limiting tee pipe, with its outlet pipe inner diameter smaller than the inlet pipe, diverts a portion of the filtered clean water to the non-operating first filters for online backwashing. Each first filter is equipped with a sealing mechanism linked to the switching valve for synchronously opening and closing the waste outlet. The backwash wastewater, after secondary filtration by the second filter, flows back to the outer pipe for recycling. This invention can operate continuously without downtime maintenance, achieving deep water resource recycling and high water efficiency.

Description

Technical Field

[0001] This invention relates to the field of spray dust suppression equipment technology, and in particular to an integrated spray dust suppression and wastewater recycling device for construction environments. Background Technology

[0002] Dust is a major source of air pollution in construction sites, mining operations, road construction, and demolition work. To control dust, sprinkler dust suppression systems are commonly used on construction sites, which spray water mist into the air to cause dust particles to settle. Traditional sprinkler dust suppression systems typically use municipal tap water or clean water sources directly, resulting in large water consumption. Furthermore, wastewater generated during construction is often discharged directly without treatment, wasting water resources and increasing the burden of sewage discharge.

[0003] Existing technologies include some devices that combine wastewater filtration and spraying. For example, a single filter is used to filter wastewater, which is then sent to a storage tank for spraying. However, the single-filter structure has significant shortcomings: when the filter cartridge becomes clogged with impurities, the machine must be stopped for manual cleaning or filter replacement. This not only interrupts dust suppression operations but also involves high maintenance frequency and labor intensity. Especially during peak construction periods with severe dust pollution, multiple shutdowns per day for cleaning may be necessary, seriously affecting construction progress and dust suppression effectiveness.

[0004] To address the issue of frequent downtime for maintenance required with a single filter, some existing technologies employ a dual-filter parallel structure. This involves manually switching the water flow path via valves, allowing the other filter to be disassembled and cleaned while one is operating. However, this method still requires manual intervention, and the cleaning process necessitates disassembling and reassembling the filter, making the operation cumbersome.

[0005] Some solutions attempt to introduce backwashing, which uses filtered clean water to backwash the filter cartridge and remove impurities. However, in existing devices, the wastewater generated after backwashing often remains at the bottom of the filter or mixes with the water flow for the next filtration, resulting in a decrease in filtration efficiency and, in severe cases, secondary pollution.

[0006] Therefore, it is necessary to develop an integrated dust suppression and wastewater recycling device for the construction environment to solve the above-mentioned technical problems. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides an integrated device for dust suppression and wastewater recycling in the construction environment.

[0008] This invention is achieved using the following technical solution: it includes an outer casing and a water storage tank disposed within the outer casing, a dual-filter water inlet mechanism and a water supply mechanism connected to the water storage tank, and a spray nozzle connected to the water supply mechanism is also disposed on the top of the outer casing. Its characteristic is that: The dual-filter water inlet mechanism includes a first delivery pump and two first filters. The inlet of the first delivery pump is connected to an external pipe for pumping wastewater. The two first filters are connected to the first delivery pump by a switching valve for switching the wastewater flow path. The two first filters are connected to the water storage tank by a flow-limiting tee pipe, thereby diverting the flow by limiting the flow rate into the water storage tank. The first filter is provided with a first filter cartridge and a waste discharge port. The first filter is also provided with a blocking mechanism to prevent wastewater backflow. The blocking mechanism is linked with the switching valve to open and close the waste discharge port simultaneously when the switching valve switches the wastewater flow path.

[0009] Preferably, the sealing mechanism includes a flow-limiting bucket fixedly disposed in the first filter and a shaft rotatably disposed in the first filter. A valve block for preventing wastewater backflow and a spring for pushing the valve block are slidably sleeved on the shaft. A baffle for sealing the waste discharge port is also provided at the top of the shaft. The end of the spring away from the valve block abuts against the connecting frame of the baffle.

[0010] Preferably, the flow-limiting hopper has a funnel-shaped structure with a smaller bottom and a larger top, and the valve block has an inverted cone-shaped structure with a larger top and a smaller bottom, so as to reduce the resistance of the wastewater to be filtered into the first filter while avoiding wastewater backflow.

[0011] Preferably, a second filter is also provided between the two first filters. The second filter is connected to the waste discharge ports on the two first filters through two waste discharge pipes. A second filter cartridge is provided inside the second filter. The second filter is connected to the external pipe through the same return pipe. The bottom inner wall of the second filter is provided with a plurality of first leakage holes arranged in a ring. A toothed disc is rotatably provided at the bottom end of the second filter. The toothed disc is drivenly connected to the switching valve and two shafts. The toothed disc is provided with a plurality of second leakage holes arranged in a ring. This allows the backwash wastewater to be filtered and then returned to the second filter, while the filtered impurities are discharged through the overlapping first and second drain holes during the path switching.

[0012] Preferably, the outlet pipe connected to the water storage tank by the flow-limiting tee has an inner diameter smaller than the two inlet pipes connected to the first filter, so that the filtered water is diverted to another first filter by limiting the water flow.

[0013] Preferably, the switching valve includes a three-way valve, a switching cylinder rotatably disposed within the three-way valve, and a motor for driving the switching cylinder to rotate. The output shaft of the motor is connected to the shaft drive. The inlet of the three-way valve is connected to the outlet of the first delivery pump, and the two outlets of the three-way valve are respectively connected to the inlets of the two first filters.

[0014] Preferably, the switching cylinder has a dish-shaped structure with an open top and a through hole on its side wall. The motor drives the switching cylinder to rotate by ° to change the orientation of the through hole, thereby switching the path of wastewater flowing into different first filters.

[0015] Preferably, the diameter of the end of the waste discharge pipe near the first filter is larger than that of the end near the second filter, and the end connected to the second filter is inclined to the side of the second filter, so that the wastewater entering the second filter forms a vortex in the second filter, and the vortex is used to reduce the adhesion of impurities on the second filter cartridge.

[0016] Preferably, the water supply mechanism includes a second delivery pump, the inlet of the second delivery pump is connected to the outlet of the water storage tank by a first connecting pipe, and the outlet of the second delivery pump is connected to the spray nozzle by a second connecting pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up two primary filters and cooperating with a switching valve, the automatic switching of filtration and backwashing functions is realized. When one filter is performing normal filtration, the other filter uses the filtered clean water to backwash online, ensuring that the device can operate continuously and completely avoiding downtime maintenance problems caused by filter cartridge blockage, significantly improving the continuity and efficiency of dust suppression operations. By utilizing the flow-limiting effect of the flow-limiting tee to generate a pressure difference, the backwash water flow is automatically diverted, eliminating the need for an additional backwash water pump or complex solenoid valve assembly. At the same time, the sealing mechanism is connected to the switching valve, and multiple actions such as water flow path switching, waste outlet opening and closing, and second filter sludge discharge can be completed synchronously through a single motor, simplifying the control system and reducing manufacturing costs and failure rate. The wastewater generated by backwashing is not discharged directly, but enters the second filter for secondary filtration, and then returns to the external pipe through the return pipe to re-enter the circulation system. This design greatly reduces wastewater discharge, realizes deep recycling of water resources, and meets the requirements of green construction and environmental protection. By configuring the waste discharge pipe with a larger diameter at the end closer to the first filter and a smaller diameter at the end closer to the second filter, and by connecting the waste discharge pipe at an angle to the side of the second filter, the flow velocity of the backwash wastewater entering the second filter is increased, and it is injected tangentially, forming a rotating vortex inside the second filter. This vortex continuously washes the surface of the second filter cartridge, effectively reducing the adhesion and accumulation of impurities on the cartridge, reducing the risk of filter cartridge clogging, thereby extending the cleaning and maintenance cycle of the second filter cartridge, improving the stability and efficiency of secondary filtration, and further ensuring the long-term continuous operation of the entire wastewater circulation system. Attached Figure Description

[0018] Figure 1This is an overall view of the integrated dust suppression and wastewater recycling device for the construction environment of the present invention. Figure 2 This is a diagram showing the disassembled cover of the integrated dust suppression and wastewater recycling device for the construction environment of the present invention. Figure 3 This is a first illustration of the water storage tank, the dual-filter water inlet mechanism, the water supply mechanism, and the spray nozzle in this invention. Figure 4 This is a second illustration of the water storage tank, the dual-filter water inlet mechanism, the water supply mechanism, and the spray nozzle in this invention. Figure 5 This is a diagram illustrating the water storage tank and dual-filter water inlet mechanism in this invention. Figure 6 This is a diagram illustrating the dual-filter water inlet mechanism of the present invention; Figure 7 This is a first partial cross-sectional view of the dual-filter water inlet mechanism in this invention; Figure 8 This is a second partial cross-sectional view of the dual-filter water inlet mechanism in this invention; Figure 9 This is a planar sectional view of the dual-filter water inlet mechanism in this invention; Figure 10 This is a cross-sectional view of the dual-filter water inlet mechanism in this invention.

[0019] Explanation of key symbols: 1. Outer casing; 2. Water storage tank; 3. Dual filter water inlet mechanism; 31. First delivery pump; 32. External pipe; 33. Switching valve; 331. Three-way valve; 332. Switching cylinder; 333. Motor; 34. First filter; 35. Flow-limiting three-way pipe; 36. Second filter; 361. Second filter cartridge; 362. Gear disc; 37. Return pipe; 38. Sealing mechanism; 381. Flow-limiting hopper; 382. Shaft; 383. Valve block; 384. Spring; 385. Baffle; 39. Waste discharge pipe; 4. Water supply mechanism; 401. Second delivery pump; 402. First connecting pipe; 403. Second connecting pipe; 5. Spray nozzle. Detailed Implementation

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0021] Please combine Figures 1 to 10 The integrated dust suppression and wastewater recycling device for the construction environment includes: a rectangular outer box 1, with casters installed at the bottom of the outer box 1 for easy movement on the construction site. Inside the outer box 1 are a water storage tank 2, a dual-filter water inlet mechanism 3, and a water supply mechanism 4. The top of the outer box 1 is equipped with a spray nozzle 5 via a tilting and rotating bracket. The water supply mechanism 4 includes a second delivery pump 401. The inlet of the second delivery pump 401 is connected to the outlet of the water storage tank 2 by a first connecting pipe 402, and the outlet of the second delivery pump 401 is connected to the spray nozzle 5 by a second connecting pipe 403.

[0022] The dual-filter inlet mechanism 3 includes a first delivery pump 31, the inlet of which is connected to an external pipe 32. The other end of the external pipe 32 extends outside the outer casing 1 and can be used to connect to an external wastewater extraction pipe. The outlet of the first delivery pump 31 is connected to a switching valve 33. The switching valve 33 has one inlet and two outlets, and the two outlets are respectively connected to two vertically installed first filters 34 through pipes. The switching valve 33 specifically includes a three-way valve 331, inside which a switching cylinder 332 is rotatably mounted. The switching cylinder 332 has an open structure and its bottom is fixedly connected to the output shaft of the motor 333. A through hole is opened on the side wall of the switching cylinder 332. When the motor 333 drives the switching cylinder 332 to rotate 180°, the orientation of the through hole will change from connecting to the left outlet to connecting to the right outlet, and vice versa, thereby realizing the switching of the water flow path.

[0023] The top outlets of the two first filters 34 are connected to the inlet of the flow-limiting tee pipe 35, and the outlet of the flow-limiting tee pipe 35 is connected to the water storage tank 2. Furthermore, the inner diameter of the outlet pipe of the flow-limiting tee pipe 35 is significantly smaller than the inner diameter of its two inlet pipes, so that the filtered wastewater entering the flow-limiting tee pipe 35 can be diverted into another non-operating first filter 34, realizing automatic backwashing and diversion.

[0024] Through the above technical solution, under the control of the switching valve 33, the wastewater is filtered through the first filter 34 currently performing the filtration operation and then enters the flow-limiting three-way pipe 35. Under the flow-limiting effect of the outlet pipe of the flow-limiting three-way pipe 35, the filtered wastewater is diverted to the water storage tank 2 and another first filter 34 in the backwashing state, completing the backwashing of the first filter cartridge 341 in the other first filter 34. At the same time, under the synchronous control of the switching valve 33, the sealing mechanism 38 releases the blockage of the waste outlet of the first filter 34 in the backwashing state, so that the backwashed wastewater can be discharged from the waste outlet.

[0025] The first filter 34 is cylindrical, with a cylindrical first filter cartridge 341 installed in the center inside. The first filter 34 has a waste discharge port. The sealing mechanism 38 also includes a flow-limiting funnel 381 fixedly installed on the inner wall of the first filter 34. This flow-limiting funnel 381 is funnel-shaped, wider at the top and narrower at the bottom. A shaft 382 is rotatably mounted inside the first filter 34, with its lower end extending outside the first filter 34 and fitted with a driven gear. A baffle 385 is fixedly installed at the upper end of the shaft 382, ​​which can be used to block the waste discharge port. A slidably fitted inverted conical valve block 383, wider at the top and narrower at the bottom, is mounted on the shaft 382. The valve block 383 engages with the inner conical surface of the flow-limiting funnel 381 to form a one-way valve structure. A spring 384 is fitted between the connecting frame of valve block 383 and baffle 385. The two ends of the spring 384 abut against the connecting frame of baffle 385 and valve block 383 respectively. The spring 384 always pushes the valve block 383 downward toward the constricted end of the flow limiting bucket 381 to prevent wastewater backflow.

[0026] During normal filtration, wastewater enters from the bottom side of the first filter 34, flows upward, opens the valve block 383 (compressing spring 384), passes through the first filter cartridge 341, and flows into the flow-limiting tee pipe 35 from the top outlet.

[0027] This device also includes a second-stage filtration system. The waste outlets of the two first filters 34 are each connected to the same second filter 36 via a waste outlet pipe 39. The second filter 36 contains a second filter cartridge 361, and its bottom has multiple annularly distributed first leakage holes. A geared disc 362 is rotatably mounted on the bottom of the second filter 36. The geared disc 362 has the same number of second leakage holes, and its outer edge is toothed. It meshes with the driven gears at the lower ends of the two shafts 382 and the drive gear on the output shaft of the motor 333. A return pipe 37 is also connected to the top of the second filter 36, and the other end of the return pipe 37 is connected to the external pipe 32 (the inlet of the first delivery pump 31). The second leakage hole on the toothed disc 362 and the first leakage hole at the bottom of the second filter are initially misaligned and sealed. When the switching valve 33 drives the toothed disc 362 to rotate, the multiple second leakage holes will overlap with the multiple first leakage holes for a short time, thereby allowing the accumulated impurities to be discharged.

[0028] The implementation principle of the integrated dust suppression and wastewater recycling device for construction environments described in this application is as follows: When the path is switched, the motor 333 of the switching valve 33 controls the switching cylinder 332 to rotate, so that the wastewater pumped out by the first delivery pump 31 enters the first filter 34 on the right side firstly. At this time, the baffle 385 in the first filter 34 on the right side blocks the waste discharge port under the action of the motor 333 through gear transmission, while the baffle 385 in the first filter 34 on the left side opens the waste discharge port. The first delivery pump 31 starts, and wastewater enters the first filter 34 on the right side through the switching valve 33. The wastewater pushes open the valve block 383 and becomes clean water after being filtered by the first filter cartridge 341. It flows into the flow-limiting tee pipe 35 from the top. Because the outlet diameter of the flow-limiting tee pipe 35 is small, the clean water cannot quickly enter the water storage tank 2, which causes the pressure in the pipeline to rise. Under the pressure, some of the clean water flows back from the left inlet pipe of the flow-limiting tee pipe 35 into the first filter 34 on the left side. After the reverse water flow enters the first filter 34 on the left side, it backwashes the first filter cartridge 341 on the left side. Because the valve block 383 is closed, the wastewater generated by the backwash can only enter the second filter 36 through the waste discharge pipe 39. After being filtered by the second filter 36, the filtered water enters the external pipe 32 through the return pipe 37 for recirculation, while the impurities in the wastewater are retained in the second filter 36. When switching the filtration path, the motor 333 drives the switching cylinder 332 to rotate, and at the same time, the drive gear drives the gear disk 362 to rotate. During the rotation of the gear disk 362, the second leakage hole on it will briefly coincide with the first leakage hole at the bottom of the second filter 36. At this time, the mud and sand impurities deposited at the bottom will be automatically discharged from the device due to gravity. When the gear disk 362 stops rotating, the second leakage hole and the first leakage hole will misalign again, and the sealing state will be restored.

[0029] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An integrated dust suppression and wastewater recycling device for a construction environment, comprising an outer casing (1) and a water storage tank (2) disposed within the outer casing (1), a dual-filter water inlet mechanism (3) connected to the water storage tank (2), and a water supply mechanism (4), wherein a spray nozzle (5) connected to the water supply mechanism (4) is also disposed on the top of the outer casing (1), characterized in that: The dual-filter water inlet mechanism (3) includes a first delivery pump (31) and two first filters (34). The inlet of the first delivery pump (31) is connected to an external pipe (32) for pumping wastewater. The two first filters (34) are connected to the first delivery pump (31) by the same switching valve (33) for switching the wastewater flow path. The two first filters (34) are connected to the water storage tank (2) by the same flow-limiting tee pipe (35), thereby diverting the flow by limiting the flow rate into the water storage tank (2). The first filter (34) is provided with a first filter cartridge (341) and a waste discharge port. The first filter (34) is also provided with a blocking mechanism (38) to prevent wastewater backflow. The blocking mechanism (38) is linked with the switching valve (33) to open and close the waste discharge port simultaneously when the switching valve (33) switches the wastewater flow path.

2. The integrated dust suppression and wastewater recycling device for construction environments as described in claim 1, characterized in that, The sealing mechanism (38) includes a flow-limiting bucket (381) fixedly installed in the first filter and a shaft (382) rotatably installed in the first filter (34). A valve block (383) for preventing wastewater backflow and a spring (384) for pushing the valve block (383) are slidably sleeved on the shaft (382). A baffle (385) for sealing the waste outlet is also provided at the top of the shaft (382). The end of the spring (384) away from the valve block (383) abuts against the connecting frame of the baffle (385).

3. The integrated dust suppression and wastewater recycling device for the construction environment as described in claim 2, characterized in that, The flow-limiting hopper (381) has a funnel-shaped structure with a smaller bottom and a larger top, and the valve block (383) has an inverted cone-shaped structure with a larger top and a smaller bottom, so as to reduce the resistance of the wastewater to be filtered into the first filter (34) while avoiding wastewater backflow.

4. The integrated dust suppression and wastewater recycling device for the construction environment as described in claim 2, characterized in that, A second filter (36) is also provided between the two first filters (34). The second filter (36) is connected to the waste outlets on the two first filters (34) through two waste discharge pipes (39). A second filter cartridge (361) is provided inside the second filter (36). The second filter (36) is connected to the outer pipe (32) through the same return pipe (37). A plurality of first leakage holes are provided on the bottom inner wall of the second filter (36). A toothed disc (362) is rotatably provided at the bottom end of the second filter (36). The toothed disc (362) is connected to the switching valve (33) and two shafts (382) in a transmission connection. A plurality of second leakage holes are provided on the toothed disc (362) in a ring. This allows the backwash wastewater to be filtered and returned after entering the second filter (36), while the filtered impurities are discharged through the overlapping first and second drain holes when the path is switched.

5. The integrated dust suppression and wastewater recycling device for construction environments as described in claim 1, characterized in that, The outlet pipe of the flow-limiting tee (35) connected to the water storage tank (2) has an inner diameter smaller than the two inlet pipes connected to the first filter (34). By limiting the water flow, the filtered water is diverted to another first filter (34).

6. The integrated dust suppression and wastewater recycling device for construction environments as described in claim 2, characterized in that, The switching valve (33) includes a three-way valve (331), a switching cylinder (332) rotatably disposed inside the three-way valve (331), and a motor (333) for driving the switching cylinder (332) to rotate. The output shaft of the motor (333) is connected to the shaft (382) for transmission. The inlet of the three-way valve (331) is connected to the outlet of the first delivery pump (31), and the two outlets of the three-way valve (331) are respectively connected to the inlets of the two first filters (34).

7. The integrated dust suppression and wastewater recycling device for construction environments as described in claim 6, characterized in that, The switching cylinder (332) has a dish-shaped structure with an open top and a through hole on its side wall. The motor (333) drives the switching cylinder (332) to rotate 180° to change the orientation of the through hole, thereby switching the path of wastewater flowing into different first filters (34).

8. The integrated dust suppression and wastewater recycling device for construction environments as described in claim 4, characterized in that, The diameter of the end of the waste discharge pipe (39) near the first filter (34) is larger than that of the end near the second filter (36), and the end connected to the second filter (36) is inclined to the side of the second filter (36), so that the wastewater entering the second filter (36) forms a vortex in the second filter (36), and the vortex is used to reduce the adhesion of impurities on the second filter cartridge (361).

9. The integrated dust suppression and wastewater recycling device for construction environments as described in claim 1, characterized in that, The water supply mechanism (4) includes a second delivery pump (401), the inlet of the second delivery pump (401) is connected to the outlet of the water storage tank (2) by a first connecting pipe (402), and the outlet of the second delivery pump (401) is connected to the spray nozzle (5) by a second connecting pipe (403).

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