Annular speed-increasing sand flushing and impeller type sand discharging device in pipeline and sand discharging method

Abstract

The invention discloses an in-pipeline annular speed-increasing sand flushing and impeller type sand discharging device which comprises a pipeline, the interior of the pipeline is connected with a speed-increasing unit, the side wall of the pipeline is connected with a sand settling mechanism, the end, away from the pipeline, of the sand settling mechanism is connected with a sand discharging mechanism, and the outer wall of the end, connected with the sand discharging mechanism, of the sand settling mechanism is connected with a supporting assembly. And the inner wall of the desilting mechanism is connected with an accelerated rotating mechanism. The invention further discloses a sand discharging method of the annular speed-increasing sand flushing and impeller type sand discharging device in the pipeline. According to the invention, sediment height sensing and valve opening for sediment discharge are combined, so that water supply and sediment discharge are synchronously carried out, and the dredging operation after water supply is cut off and the dredging difficulty of a closed space are reduced; the impeller type rotating device is arranged in the pipeline, energy generated by movement of water flow in the pipeline is used for driving the impeller to rotate, energy recycling is achieved, and the sand discharging device is environmentally friendly and economical.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline sediment reduction and anti-silting equipment, and specifically relates to an annular speed increasing sand flushing and impeller type sand discharge device in a pipeline, and also relates to a sand discharge method of the sand discharge device. Background Art

[0002] With the rapid development of the economy and society, the demand for water in industrial and agricultural production has expanded. In order to meet the demand for water resources, pipeline transportation has become one of the efficient ways of water transportation due to its advantages of not being affected by external conditions, high continuous transportation efficiency, and low energy loss. However, in the process of long-distance transportation, there are large elevation differences in the terrain along the route. When the pipeline is transporting high-sand water, siltation is inevitable. Especially after the water supply is cut off, the fine particles of silt in the undulating section of the pipeline settle to the bottom of the pipeline. As a closed space, the silt is hard to discharge. When the pipeline operates normally again, the silt accumulation causes the pipeline flow section to decrease, resulting in reduced water delivery efficiency, shortened pipeline operation life, and increased dredging costs. Therefore, how to effectively solve the problem of silt accumulation in pressurized pipelines, improve pipeline transportation efficiency, and avoid silt accumulation in water pipelines is a hot topic in the field of long-distance pressurized water pipeline engineering technology. Summary of the invention

[0003] The purpose of the present invention is to provide an annular speed increasing sand flushing and impeller type sand discharge device in a pipeline, so as to solve the problem of sedimentation in the existing pipeline.

[0004] Another object of the present invention is to provide a sand removal method of an annular speed increasing sand flushing and impeller type sand removal device in a pipeline.

[0005] The technical solution adopted by the present invention is an annular speed-increasing sand flushing and impeller-type sand discharge device in a pipeline, comprising a pipeline, an speed-increasing unit connected to the interior of the pipeline, a sand settling mechanism connected to the side wall of the pipeline, a sand discharge mechanism connected to the end of the sand settling mechanism away from the pipeline, a support assembly connected to the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism, and an accelerating rotation mechanism connected to the inner wall of the sand settling mechanism.

[0006] The present invention is also characterized in that: The speed increasing unit comprises a hollow tube, the outer wall of the hollow tube is connected to the inner wall of the pipeline through a supporting rod, and the tube body of the hollow tube is connected to a first valve.

[0007] The hollow tube is coaxially arranged with the pipeline, and the hollow tube is arranged upstream of the sand settling mechanism in the water flow direction.

[0008] The sedimentation mechanism includes a sedimentation tank, which is connected to the side wall of the pipeline. The sedimentation tank is arranged downstream of the water flow direction of the hollow pipe. The inner wall of the sedimentation tank is connected to the accelerating rotation mechanism, the end of the sedimentation tank away from the pipeline is connected to the sand discharge mechanism, and the outer wall of the sedimentation tank is connected to the supporting assembly.

[0009] The support assembly includes pillars, which are connected to the outer wall of the sedimentation tank.

[0010] The sand discharge mechanism includes a sand discharge chamber, which is connected to the sedimentation tank. The end of the sand discharge chamber away from the sedimentation tank is connected to a sand discharge pipe, the end of the sand discharge pipe away from the sand discharge chamber is connected to a separation unit, the pipe body of the sand discharge pipe is connected to a second valve, the inner wall of the sedimentation tank is connected to a sediment height sensor, and the sediment height sensor is arranged near the top of the sand discharge chamber.

[0011] The sand discharge chamber is arranged in a funnel shape, the larger end of the sand discharge chamber is connected to the sand settling tank, and the smaller end of the sand discharge chamber is connected to the sand discharge pipe.

[0012] The separation unit includes an inclined sand conveying pipe, the body of which is connected to the end of the sand discharge pipe away from the sand discharge chamber, the inner wall of the sand conveying pipe is connected to a perforated plate, a rotating shaft is passed through the perforated plate, a plurality of blades are connected to the body of the rotating shaft along its length, the rotating shaft is coaxially arranged with the sand conveying pipe, and a driving unit is connected to the end of the rotating shaft.

[0013] The accelerating rotating mechanism includes a rotating impeller, the middle part of which is connected to the inner wall of the sedimentation tank through a driving shaft, and the rotating impeller is connected to a plurality of supporting rods along its circumference, the end of each supporting rod is connected to an arc-shaped water tank, and a fixing ring is connected between the rod bodies of the plurality of supporting rods. Another technical solution adopted by the present invention is a sand removal method of an annular speed increasing sand flushing and impeller type sand removal device in a pipeline, which is specifically implemented according to the following steps: Step 1: Set the hollow pipe and the sedimentation tank on both sides of the pipeline where sediment is easy to accumulate, open the first valve, and transfer water normally in the pipeline; Step 2: When siltation occurs in the pipeline, the first valve is closed, the flow cross-section is reduced, and the water flow with increased flow rate brings the siltation into the sedimentation tank and accumulates in the sand discharge chamber; Step 3: When the sediment height sensor senses sediment, the second valve is opened, and the sediment enters the sediment transport pipe. The driving unit drives the rotating shaft to rotate, and the blades drive the sediment to be discharged from the higher end of the sediment transport pipe. The water is discharged from the lower end of the sediment transport pipe under the action of its own weight.

[0014] The beneficial effects of the present invention are: The annular speed-increasing sand flushing and impeller-type sand discharge device in the pipeline of the present invention combines sediment height sensing with valve opening to discharge sand, thereby realizing simultaneous water supply and sand discharge, reducing the difficulty of silt removal operations after water outage and silt removal in closed spaces; an impeller-type rotating device is arranged in the pipeline, and the energy generated by the movement of water flow in the pipeline is used to drive the impeller to rotate, thereby realizing energy recycling, and is a green and economical sand discharge device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the annular speed increasing sand flushing and impeller type sand discharge device in the pipeline of the present invention; Figure 2 It is a cross-sectional view of the annular speed increasing sand flushing and impeller type sand discharge device in the pipeline of the present invention; Figure 3 This is a side view of the middle pipe of the annular speed increasing sand flushing and impeller type sand removal device in the pipe of the present invention. Figure 4 It is a schematic diagram of the connection structure of the sand settling mechanism in the annular speed increasing sand flushing and impeller type sand discharge device in the pipeline of the present invention; Figure 5 It is a structural schematic diagram of the separation unit in the annular speed increasing sand flushing and impeller type sand discharge device in the pipeline of the present invention; Figure 6 It is a structural schematic diagram of the accelerating rotation mechanism in the annular speed increasing sand flushing and impeller type sand discharge device in the pipeline of the present invention.

[0016] In the figure: 1. pipeline, 2. hollow pipe, 3. first valve, 4. sedimentation tank, 5. support, 6. sand discharge chamber, 7. sediment height sensor, 8. sand discharge pipe, 9. second valve, 10. sand transport pipe, 11. orifice plate, 12. rotating shaft, 13. blade, 14. drive unit, 15. drive shaft, 16. support rod, 17. arc water tank, 18. fixing ring, 19. rotating impeller. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] The present invention provides an annular speed increasing sand flushing and impeller type sand removal device in a pipeline, such as Figure 1-3 As shown, it includes a pipeline 1, the interior of the pipeline 1 is connected with an increasing speed unit, the side wall of the pipeline 1 is connected with a sand settling mechanism, the end of the sand settling mechanism away from the pipeline 1 is connected with a sand discharge mechanism, the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism is connected with a support assembly, and the inner wall of the sand settling mechanism is connected with an accelerating rotating mechanism. The sand-containing water flow is transported from the pipeline 1, and the increasing speed unit is arranged upstream of the water flow direction where the silt is easy to accumulate. When the silt accumulates, the increasing speed unit increases the flow velocity of the water flow in the pipeline, brings the accumulated silt into the silt settling mechanism for deposition, and separates and discharges the deposited silt and water through the sand discharge mechanism. The accelerating rotating mechanism can renew the clean water in the silt settling mechanism.

[0019] Example 1 The annular speed-increasing sand flushing and impeller-type sand discharge device in a pipeline comprises a pipeline 1, the interior of the pipeline 1 is connected with a speed-increasing unit, the side wall of the pipeline 1 is connected with a sand settling mechanism, the end of the sand settling mechanism away from the pipeline 1 is connected with a sand discharge mechanism, the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism is connected with a supporting assembly, and the inner wall of the sand settling mechanism is connected with an accelerating rotation mechanism.

[0020] The speed increasing unit comprises a hollow tube 2, the outer wall of the hollow tube 2 is connected to the inner wall of the pipeline 1 through a support rod, and the body of the hollow tube 2 is connected to a first valve 3. The hollow tube 2 is arranged at a position where sediment is easy to accumulate in the pipeline 1, and the hollow tube 2 is arranged upstream of the position where sediment is easy to accumulate. When the sediment content of the water flow in the pipeline 1 is small and there is no sediment accumulation, the sandy water flow passes through the pipeline 1, and at the same time, the first valve 3 is opened, and the water flow also passes through the hollow tube 2.

[0021] The hollow tube 2 is coaxially arranged with the pipeline 1, and the hollow tube 2 is arranged upstream of the water flow direction of the sand settling mechanism. The hollow tube 2 is arranged upstream of the water flow direction of the sand settling mechanism. When the sand content in the water flow is large and siltation occurs at the bottom of the pipeline 1, the first valve 3 is closed, and a circulation is formed between the inner wall of the pipeline 1 and the outer wall of the hollow tube 2, the flow cross-section is reduced, and the water flow velocity is increased to carry the siltation into the sand settling mechanism.

[0022] Example 2 The annular speed-increasing sand flushing and impeller-type sand discharge device in a pipeline comprises a pipeline 1, the interior of the pipeline 1 is connected with a speed-increasing unit, the side wall of the pipeline 1 is connected with a sand settling mechanism, the end of the sand settling mechanism away from the pipeline 1 is connected with a sand discharge mechanism, the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism is connected with a supporting assembly, and the inner wall of the sand settling mechanism is connected with an accelerating rotation mechanism.

[0023] The speed increasing unit comprises a hollow tube 2 , the outer wall of the hollow tube 2 is connected to the inner wall of the pipeline 1 through a support rod, and the body of the hollow tube 2 is connected to a first valve 3 .

[0024] The hollow tube 2 is coaxially arranged with the pipeline 1, and the hollow tube 2 is arranged upstream of the sand settling mechanism in the water flow direction.

[0025] like Figure 4 As shown, the sedimentation mechanism includes a sedimentation tank 4, which is connected to the side wall of the pipeline 1. The sedimentation tank 4 is arranged downstream of the water flow direction of the hollow pipe 2, and the inner wall of the sedimentation tank 4 is connected to the accelerating rotation mechanism. The end of the sedimentation tank 4 away from the pipeline 1 is connected to the sand discharge mechanism, and the outer wall of the sedimentation tank 4 is connected to the supporting assembly. The water flow with increased flow rate carries the silt into the sedimentation tank 4 and accumulates in the sand discharge mechanism from the sedimentation tank 4. When there is no silt accumulation, the water flow also fills the sedimentation tank 4. When the water flow rate increases, it drives the accelerating rotation mechanism to rotate. During the rotation of the accelerating rotation mechanism, the water flow in the sedimentation tank 4 is brought out to the pipeline 1, so as to achieve the purpose of renewing the clean water in the sedimentation tank 4.

[0026] Example 3 The annular speed-increasing sand flushing and impeller-type sand discharge device in a pipeline comprises a pipeline 1, the interior of the pipeline 1 is connected with a speed-increasing unit, the side wall of the pipeline 1 is connected with a sand settling mechanism, the end of the sand settling mechanism away from the pipeline 1 is connected with a sand discharge mechanism, the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism is connected with a supporting assembly, and the inner wall of the sand settling mechanism is connected with an accelerating rotation mechanism.

[0027] The speed increasing unit comprises a hollow tube 2 , the outer wall of the hollow tube 2 is connected to the inner wall of the pipeline 1 through a support rod, and the body of the hollow tube 2 is connected to a first valve 3 .

[0028] The hollow tube 2 is coaxially arranged with the pipeline 1, and the hollow tube 2 is arranged upstream of the sand settling mechanism in the water flow direction.

[0029] like Figure 4 As shown, the sedimentation mechanism includes a sedimentation tank 4, which is connected to the side wall of the pipeline 1. The sedimentation tank 4 is arranged downstream of the water flow direction of the hollow pipe 2. The inner wall of the sedimentation tank 4 is connected to the accelerating rotation mechanism, the end of the sedimentation tank 4 away from the pipeline 1 is connected to the sand discharge mechanism, and the outer wall of the sedimentation tank 4 is connected to the supporting assembly.

[0030] The support assembly includes a support column 5, and the support column 5 is connected to the outer wall of the sedimentation tank 4. The support column 5 supports the entire sedimentation tank 4 and its bottom connecting parts.

[0031] Example 4 The annular speed-increasing sand flushing and impeller-type sand discharge device in a pipeline comprises a pipeline 1, the interior of the pipeline 1 is connected with a speed-increasing unit, the side wall of the pipeline 1 is connected with a sand settling mechanism, the end of the sand settling mechanism away from the pipeline 1 is connected with a sand discharge mechanism, the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism is connected with a supporting assembly, and the inner wall of the sand settling mechanism is connected with an accelerating rotation mechanism.

[0032] The speed increasing unit comprises a hollow tube 2 , the outer wall of the hollow tube 2 is connected to the inner wall of the pipeline 1 through a support rod, and the body of the hollow tube 2 is connected to a first valve 3 .

[0033] The hollow tube 2 is coaxially arranged with the pipeline 1, and the hollow tube 2 is arranged upstream of the sand settling mechanism in the water flow direction.

[0034] The sedimentation mechanism includes a sedimentation tank 4, which is connected to the side wall of the pipeline 1. The sedimentation tank 4 is arranged downstream of the water flow direction of the hollow pipe 2. The inner wall of the sedimentation tank 4 is connected to the accelerating rotation mechanism, the end of the sedimentation tank 4 away from the pipeline 1 is connected to the sand discharge mechanism, and the outer wall of the sedimentation tank 4 is connected to the supporting assembly.

[0035] The supporting assembly includes a support column 5 , and the support column 5 is connected to the outer wall of the sedimentation tank 4 .

[0036] The sand discharge mechanism includes a sand discharge chamber 6, which is connected to the sand settling tank 4, and the end of the sand discharge chamber 6 away from the sand settling tank 4 is connected to a sand discharge pipe 8, and the end of the sand discharge pipe 8 away from the sand discharge chamber 6 is connected to a separation unit, and the pipe body of the sand discharge pipe 8 is connected to a second valve 9, and the inner wall of the sand settling tank 4 is connected to a sediment height sensor 7, and the sediment height sensor 7 is arranged near the top of the sand discharge chamber 6. The sediment enters the sand discharge chamber 6 from the sand settling tank 4 and accumulates in the sand discharge chamber 6. During the sediment accumulation process, the second valve 9 is closed. When the height of the sediment accumulation increases to the position of the sediment height sensor 7, the second valve 9 is opened, and the sediment enters the separation unit through the sand discharge pipe 8, and then the sediment is separated and discharged.

[0037] The sand discharge chamber 6 is configured to be funnel-shaped, the larger end of the sand discharge chamber 6 is connected to the sand settling tank 4, and the smaller end of the sand discharge chamber 6 is connected to the sand discharge pipe 8. The sand discharge chamber 6 is configured to be funnel-shaped, and when the second valve 9 is opened, the water flow velocity at the smaller end of the sand discharge chamber 6 increases, and the sand compacted on the inner wall of the sand discharge chamber 6 can be washed away.

[0038] Example 5 The annular speed-increasing sand flushing and impeller-type sand discharge device in a pipeline comprises a pipeline 1, the interior of the pipeline 1 is connected with a speed-increasing unit, the side wall of the pipeline 1 is connected with a sand settling mechanism, the end of the sand settling mechanism away from the pipeline 1 is connected with a sand discharge mechanism, the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism is connected with a supporting assembly, and the inner wall of the sand settling mechanism is connected with an accelerating rotation mechanism.

[0039] The speed increasing unit comprises a hollow tube 2 , the outer wall of the hollow tube 2 is connected to the inner wall of the pipeline 1 through a support rod, and the body of the hollow tube 2 is connected to a first valve 3 .

[0040] The hollow tube 2 is coaxially arranged with the pipeline 1, and the hollow tube 2 is arranged upstream of the sand settling mechanism in the water flow direction.

[0041] The sedimentation mechanism includes a sedimentation tank 4, which is connected to the side wall of the pipeline 1. The sedimentation tank 4 is arranged downstream of the water flow direction of the hollow pipe 2. The inner wall of the sedimentation tank 4 is connected to the accelerating rotation mechanism, the end of the sedimentation tank 4 away from the pipeline 1 is connected to the sand discharge mechanism, and the outer wall of the sedimentation tank 4 is connected to the supporting assembly.

[0042] The supporting assembly includes a support column 5 , and the support column 5 is connected to the outer wall of the sedimentation tank 4 .

[0043] The sand discharge mechanism includes a sand discharge chamber 6, which is connected to the sand settling tank 4. The end of the sand discharge chamber 6 away from the sand settling tank 4 is connected to a sand discharge pipe 8, the end of the sand discharge pipe 8 away from the sand discharge chamber 6 is connected to a separation unit, the pipe body of the sand discharge pipe 8 is connected to a second valve 9, and the inner wall of the sand settling tank 4 is connected to a sediment height sensor 7, which is arranged near the top of the sand discharge chamber 6.

[0044] The sand discharge chamber 6 is configured to be funnel-shaped, the larger end of the sand discharge chamber 6 is connected to the sand settling tank 4 , and the smaller end of the sand discharge chamber 6 is connected to the sand discharge pipe 8 .

[0045] like Figure 5 As shown, the separation unit includes an inclined sand conveying pipe 10, the body of the sand conveying pipe 10 is connected to the end of the sand discharge pipe 8 away from the sand discharge chamber 6, the inner wall of the sand conveying pipe 10 is connected to a perforated plate 11, the perforated plate 11 is penetrated with a rotating shaft 12, the shaft body of the rotating shaft 12 is connected with a plurality of blades 13 along its length direction, the rotating shaft 12 is coaxially arranged with the sand conveying pipe 10, and the end of the rotating shaft 12 is connected to a driving unit 14. The driving unit 14 is a rotating motor, which drives the rotating shaft 12 to rotate, and under the action of the blades 13, the silt is discharged from the higher side of the sand conveying pipe 10. The sand conveying pipe 10 is inclined, and when the silt in the sand discharge chamber 6 enters the sand conveying pipe 10, the water flows through the perforated plate 11 under the action of its own weight and flows out along the inclined direction of the sand conveying pipe 10, so as to realize the separation of silt and water flow. In order to prevent the outflowing water flow from entering the driving unit, a water diversion trough can be connected to the end of the sand conveying pipe 10 for drainage.

[0046] Example 6 The annular speed-increasing sand flushing and impeller-type sand discharge device in a pipeline comprises a pipeline 1, the interior of the pipeline 1 is connected with a speed-increasing unit, the side wall of the pipeline 1 is connected with a sand settling mechanism, the end of the sand settling mechanism away from the pipeline 1 is connected with a sand discharge mechanism, the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism is connected with a supporting assembly, and the inner wall of the sand settling mechanism is connected with an accelerating rotation mechanism.

[0047] The speed increasing unit comprises a hollow tube 2 , the outer wall of the hollow tube 2 is connected to the inner wall of the pipeline 1 through a support rod, and the body of the hollow tube 2 is connected to a first valve 3 .

[0048] The hollow tube 2 is coaxially arranged with the pipeline 1, and the hollow tube 2 is arranged upstream of the sand settling mechanism in the water flow direction.

[0049] The sedimentation mechanism includes a sedimentation tank 4, which is connected to the side wall of the pipeline 1. The sedimentation tank 4 is arranged downstream of the water flow direction of the hollow pipe 2. The inner wall of the sedimentation tank 4 is connected to the accelerating rotation mechanism, the end of the sedimentation tank 4 away from the pipeline 1 is connected to the sand discharge mechanism, and the outer wall of the sedimentation tank 4 is connected to the supporting assembly.

[0050] The supporting assembly includes a support column 5 , and the support column 5 is connected to the outer wall of the sedimentation tank 4 .

[0051] The sand discharge mechanism includes a sand discharge chamber 6, which is connected to the sand settling tank 4. The end of the sand discharge chamber 6 away from the sand settling tank 4 is connected to a sand discharge pipe 8, the end of the sand discharge pipe 8 away from the sand discharge chamber 6 is connected to a separation unit, the pipe body of the sand discharge pipe 8 is connected to a second valve 9, and the inner wall of the sand settling tank 4 is connected to a sediment height sensor 7, which is arranged near the top of the sand discharge chamber 6.

[0052] The sand discharge chamber 6 is configured to be funnel-shaped, the larger end of the sand discharge chamber 6 is connected to the sand settling tank 4 , and the smaller end of the sand discharge chamber 6 is connected to the sand discharge pipe 8 .

[0053] like Figure 5 As shown, the separation unit includes an inclined sand transport pipe 10, the body of the sand transport pipe 10 is connected to the end of the sand discharge pipe 8 away from the sand discharge chamber 6, the inner wall of the sand transport pipe 10 is connected to a perforated plate 11, and the perforated plate 11 is penetrated by a rotating shaft 12, the body of the rotating shaft 12 is connected to a plurality of blades 13 along its length direction, the rotating shaft 12 is coaxially arranged with the sand transport pipe 10, and the end of the rotating shaft 12 is connected to a driving unit 14.

[0054] like Figure 6 As shown, the accelerating rotation mechanism includes a rotating impeller 19, the middle part of which is connected to the inner wall of the sedimentation tank 4 through a driving shaft 15, and the rotating impeller 19 is connected to a plurality of supporting rods 16 along its circumference, and the end of each supporting rod 16 is connected to an arc-shaped water tank 17, and a fixing ring 18 is connected between the rods of the plurality of supporting rods 16. The structure formed by the rotating impeller 19 and the plurality of supporting rods 16 is similar to a wheel, the supporting rods 16 are similar to spokes, and the fixing ring 18 increases the stability of the plurality of supporting rods 16. Driven by the water flow, the rotating impeller 19 rotates. During the rotation process, the highest point of the arc-shaped water tank 17 is located between the bottom of the pipeline 1 and the center line of the pipeline 1, and the lowest point of the arc-shaped water tank 17 is not lower than the bottom surface of the sedimentation tank 4 and higher than the sediment height sensor 7. During the rotation process of the rotating impeller 19, the clean water in the sedimentation tank 4 is driven to the pipeline 1 downstream of the sedimentation tank 4 through the arc-shaped water tank 17. If the water flow velocity is too low to drive the rotating impeller 19 to rotate, the driving shaft 15 may be connected to an external driving device, such as a motor, to drive the rotating impeller 19 to rotate.

[0055] Example 7 The sand removal method of the annular speed increasing sand flushing and impeller type sand removal device in the pipeline of the present invention is specifically implemented according to the following steps: Step 1: install the hollow pipe 2 and the sedimentation tank 4 on both sides of the pipeline 1 where sediment is easy to accumulate, open the first valve 3, and transfer water normally in the pipeline 1; Step 2: When siltation occurs in the pipeline 1, the first valve 3 is closed, the flow cross-section is reduced, and the water flow with increased flow rate brings the siltation into the sedimentation tank 4 and accumulates in the sand discharge chamber 6; Step 3: When the sediment height sensor 7 senses sediment, the second valve 9 is opened, and the sediment enters the sediment conveying pipe 10. The driving unit drives the rotating shaft 12 to rotate, and the blades 13 drive the sediment to be discharged from the higher end of the sediment conveying pipe 10. The water is discharged from the lower end of the sediment conveying pipe 10 under the action of its own weight.

[0056] The working principle of the annular speed increasing sand flushing and impeller type sand removal device in the pipeline of the present invention is as follows: A hollow pipe 2 containing a first valve 3 is arranged at a position where the silt in the pipeline 1 is prone to siltation. When the silt content in the water flow in the pipeline 1 is small and there is no silt accumulation, the first valve 3 is opened and the pipeline 1 conveys water normally. When the silt content is large and silt accumulation occurs at the bottom of the pipeline 1, the first valve 3 is closed, the flow cross-section is reduced, the water flow velocity increases, and the silt is carried into the sedimentation tank 4, and the silt is precipitated into the sediment discharge chamber 6. At the same time, the increase in flow velocity will drive the rotating impeller 19 to rotate, and the rotation of the impeller can renew the clean water in the sedimentation tank 4. As the water delivery time goes by, when the silt accumulation height in the sediment discharge chamber 6 gradually increases to the position of the silt height sensor 7, the second valve 9 is automatically opened, and the silt enters the sediment conveying pipe 10. The driving unit 14 on the right side of the sediment conveying pipe 10 discharges the silt from the left side by driving the rotating shaft 12, and the water flow is discharged from the right side by utilizing the slight inclination slope of the sediment conveying pipe 10 and the gravity of the water flow, thereby achieving silt removal and sand discharge.

[0057] The annular speed-increasing sand flushing and impeller-type sand discharge device in the pipeline of the present invention is designed with a hollow tube containing a valve in the pipeline. When the sand content is small and there is no sediment accumulation in the pipeline, the valve can be opened for normal operation, which has little effect on the operation and scheduling of the water flow in the pipeline. When sediment accumulation occurs, the valve is closed to form a circulation, and the flow cross-section is reduced, so that the effect of speed-increasing sand flushing can be achieved; an impeller-type rotating device is arranged in the pipeline, and the energy generated by the movement of the water flow in the pipeline is used to drive the impeller to rotate, thereby realizing energy recycling; the top of the rotating impeller is higher than the bottom of the pipeline and lower than the center of the pipeline, and the sediment in the pipeline is mostly concentrated in the middle and lower parts for movement. This arrangement can intercept part of the suspended sediment moving at the bottom of the pipeline, and has a certain sand interception effect; the sand conveying pipe is arranged with the left side higher and the right side lower. After the sediment enters the sand conveying pipe, the sediment is discharged from the left side by the rotation of the rotating shaft, and the water flow is discharged from the right side under the action of its own gravity, thereby realizing water-sand separation.

Claims

1. An annular speed increasing sand flushing and impeller type sand removal device in the pipeline, characterized in that: The invention comprises a pipeline (1), wherein the interior of the pipeline (1) is connected to a speed increasing unit, the side wall of the pipeline (1) is connected to a sand settling mechanism, the end of the sand settling mechanism away from the pipeline (1) is connected to a sand discharge mechanism, the outer wall of the sand settling mechanism connected to one end of the sand discharge mechanism is connected to a support assembly, and the inner wall of the sand settling mechanism is connected to an accelerating rotation mechanism.

2. The annular speed increasing sand flushing and impeller type sand removal device in the pipeline according to claim 1 is characterized in that: The speed increasing unit comprises a hollow tube (2), the outer wall of the hollow tube (2) being connected to the inner wall of the pipeline (1) via a support rod, and the body of the hollow tube (2) being connected to a first valve (3).

3. The annular speed increasing sand flushing and impeller type sand removal device in the pipeline according to claim 2 is characterized in that: The hollow tube (2) is coaxially arranged with the pipeline (1), and the hollow tube (2) is arranged upstream of the sand settling mechanism in the water flow direction.

4. The annular speed increasing sand flushing and impeller type sand removal device in the pipeline according to claim 3 is characterized in that: The desilting mechanism comprises a desilting tank (4), the desilting tank (4) being connected to the side wall of the pipeline (1), the desilting tank (4) being arranged downstream of the hollow pipe (2) in the water flow direction, the inner wall of the desilting tank (4) being connected to the accelerating rotation mechanism, the end of the desilting tank (4) away from the pipeline (1) being connected to the desilting mechanism, and the outer wall of the desilting tank (4) being connected to the supporting assembly.

5. The annular speed increasing sand flushing and impeller type sand removal device in the pipeline according to claim 4 is characterized in that: The support assembly comprises a support column (5), and the support column (5) is connected to the outer wall of the sedimentation tank (4).

6. The annular speed increasing sand flushing and impeller type sand removal device in the pipeline according to claim 4 is characterized in that: The sand discharge mechanism comprises a sand discharge chamber (6), the sand discharge chamber (6) being connected to a sand settling tank (4), the end of the sand discharge chamber (6) away from the sand settling tank (4) being connected to a sand discharge pipe (8), the end of the sand discharge pipe (8) away from the sand discharge chamber (6) being connected to a separation unit, the pipe body of the sand discharge pipe (8) being connected to a second valve (9), the inner wall of the sand settling tank (4) being connected to a sediment height sensor (7), and the sediment height sensor (7) being arranged close to the top of the sand discharge chamber (6).

7. The annular speed increasing sand flushing and impeller type sand removal device in a pipeline according to claim 6 is characterized in that: The sand discharge chamber (6) is configured to be funnel-shaped, the larger end of the sand discharge chamber (6) is connected to the sand settling tank (4), and the smaller end of the sand discharge chamber (6) is connected to the sand discharge pipe (8).

8. The annular speed increasing sand flushing and impeller type sand removal device in a pipeline according to claim 6, characterized in that: The separation unit comprises an inclined sand transport pipe (10), the body of the sand transport pipe (10) being connected to the end of the sand discharge pipe (8) away from the sand discharge chamber (6), the inner wall of the sand transport pipe (10) being connected to a perforated plate (11), the perforated plate (11) being provided with a rotating shaft (12), the body of the rotating shaft (12) being connected to a plurality of blades (13) along its length direction, the rotating shaft (12) being coaxially arranged with the sand transport pipe (10), and the end of the rotating shaft (12) being connected to a driving unit (14).

9. The annular speed increasing sand flushing and impeller type sand removal device in a pipeline according to claim 4, characterized in that: The accelerating rotation mechanism comprises a rotating impeller (19), the middle portion of which is connected to the inner wall of the sedimentation tank (4) via a driving shaft (15), the rotating impeller (19) being connected to a plurality of supporting rods (16) along its circumference, the end of each supporting rod (16) being connected to an arc-shaped water trough (17), and a fixing ring (18) being connected between the rod bodies of the plurality of supporting rods (16).

10. The sand removal method of the annular speed increasing sand flushing and impeller type sand removal device in a pipeline according to any one of claims 1 to 9, characterized in that: Follow the steps below to implement it: Step 1: Arrange the hollow pipe (2) and the sedimentation tank (4) on both sides of the pipeline (1) where sediment is likely to accumulate, open the first valve (3), and allow water to flow normally in the pipeline (1); Step 2: When sedimentation occurs in the pipeline (1), the first valve (3) is closed, the flow cross-section is reduced, and the water flow with increased flow rate carries the sedimentation into the sedimentation tank (4) and accumulates in the sediment discharge chamber (6); Step 3: When the sediment height sensor (7) senses sediment, the second valve (9) is opened, and the sediment enters the sediment conveying pipe (10). The driving unit drives the rotating shaft (12) to rotate, and the blades (13) drive the sediment to be discharged from the higher end of the sediment conveying pipe (10). The water is discharged from the lower end of the sediment conveying pipe (10) under the action of its own weight.

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