Modularized flow channel device with energy dissipation and anti-blocking performance

Abstract

The utility model provides a modularization flow channel device with energy dissipation and anti-blocking performance, which comprises a flow channel, an energy dissipation cavity is arranged in the flow channel, a plurality of groups of flow channel units are arranged in the energy dissipation cavity, each flow channel unit comprises a base, an annular energy dissipation flow channel is arranged on the upper side of the base, sharp tooth protrusions are arranged on the inner wall of the energy dissipation flow channel, and the sharp tooth protrusions are arranged on the inner wall of the annular energy dissipation flow channel. The annular energy dissipation flow channels are arranged around the water distribution body, water inlets and water outlets are formed in the peripheries of the annular energy dissipation flow channels, the annular energy dissipation flow channels of the adjacent flow channel units are communicated through the water inlets and the water outlets, a water inlet is formed in one end of each flow channel and communicated with the water inlet and the water outlet of the flow channel unit arranged at the end, and a plurality of water outlets are formed in the side wall of each flow channel. And the water inlets and outlets formed in the side edges of the runner units on the boundary of the energy dissipation cavity are communicated with the corresponding water outlets. The device can adjust the water flow direction and improve the energy dissipation effect, and silt is not prone to being deposited.

Description

Technical Field

[0001] The utility model relates to the technical field of water-saving irrigation, in particular to a modular flow channel device with energy dissipation and anti-blocking performance. Background Art

[0002] The drip irrigation flow channel device is one of the internationally recognized technologies with high water-saving effects, and is also the most effective water-saving irrigation method in arid and water-scarce areas. The drip irrigation flow channel device can greatly improve the utilization rate of water resources and has great utilization efficiency for China, a large agricultural country.

[0003] However, there have always been two major problems with the drip irrigation system: 1. It is easy to clog and has a short service life; 2. Insufficient energy dissipation causes uneven water output. Large-scale blockage will cause the drip irrigation system to fail, which greatly limits the promotion and application of flow channel devices. The structural unit of the traditional flow channel device is fixed. After long-term use, it is inevitable that sediment particles will clog the flow channel, affecting the normal operation of the flow channel device. Therefore, a new flow channel device is needed that can reduce sediment blockage and facilitate regular cleaning and replacement of the flow channel unit even under working conditions where the irrigation water contains large sediment particles, so as to solve the problem that the current flow channel device is very easy to clog. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a modular flow channel device with energy dissipation and anti-blocking performance, which can adjust the flow direction of water, improve the energy dissipation effect, and prevent sediment from silting up.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a modular flow channel device with energy dissipation and anti-blocking performance, including a flow channel, an energy dissipation cavity is arranged in the flow channel, and multiple groups of flow channel units are arranged in the energy dissipation cavity. The flow channel unit includes a base, an annular energy dissipation flow channel is arranged on the upper side of the base, and sharp tooth protrusions are arranged on the inner wall of the energy dissipation flow channel. The annular energy dissipation flow channel is arranged around the water diversion body, and water inlets and outlets are arranged around the annular energy dissipation flow channel. The annular energy dissipation flow channels of adjacent flow channel units are connected through the water inlets and outlets. A water inlet is arranged at one end of the flow channel, and the water inlet is connected to the water inlet and outlet of the flow channel unit arranged at the end. A plurality of water outlets are arranged on the side wall of the flow channel, and the water inlets and outlets on the sides of the flow channel unit arranged on the boundary of the energy dissipation cavity are connected to the corresponding water outlets.

[0006] In a preferred solution, a cover plate is provided on the upper side of the flow channel, a limiting groove is provided on the upper side of the flow channel, and a limiting protrusion cooperating with the limiting groove is provided on the lower side of the cover plate.

[0007] In a preferred solution, the upper side wall of the flow channel is provided with a plurality of lower limit holes, the limit protrusion is provided with upper limit holes corresponding to the lower limit holes, and the limit plate simultaneously penetrates the lower limit holes and the upper limit holes to limit the cover plate.

[0008] In a preferred solution, some of the water outlets are provided with water blocking blocks.

[0009] In a preferred solution, a slide groove is provided on the outside of the flow channel, and a sliding block matching the slide groove is provided at the bottom of the water blocking block. The water blocking block moves along the slide groove to the water outlet position to block water at the water outlet.

[0010] The utility model provides a modular flow channel device with energy dissipation and anti-blocking performance, which has the following beneficial effects:

[0011] 1. The sharp teeth on the inner wall of the annular energy dissipation flow channel are in the shape of sharp teeth, which can adjust the flow direction of water and form counter-energy dissipation. The water flow counter-flows, increases the head loss, and improves the hydraulic performance of the flow channel device. In addition, it can be set into an ultra-long distance energy dissipation flow channel to double the energy dissipation effect of the flow channel device. In addition, the water flow velocity at the annular energy dissipation flow channel is extremely large, which is conducive to the outflow of sediment, so the sediment is not easy to accumulate, which improves the anti-clogging performance.

[0012] 2. Modular division of flow channel units is realized to facilitate regular cleaning and replacement at any time, avoiding blockage of flow channels by sediment particles;

[0013] 3. Based on the hydraulic performance of the existing flow channel device, the utility model has a good energy dissipation effect. The setting of multiple water-blocking blocks can not only adjust the outflow size of the flow channel device, but also improve the anti-negative pressure clogging performance of the flow channel device. The water output is uniform and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a partial enlarged view of the utility model;

[0017] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 4 It is a bottom view of the utility model;

[0019] Figure 5 Schematic diagram of the distribution structure of the flow channel unit;

[0020] Figure 6 It is a schematic diagram of the structure of the flow channel unit;

[0021] Figure 7 is a schematic diagram of the structure of the cover plate;

[0022] Figure 8It is the local velocity vector diagram of the utility model;

[0023] Fig. 9 It is a local water flow streamline diagram of the utility model;

[0024] Fig.10 It is the velocity cloud diagram of the utility model;

[0025] Fig.11 It is the numerical simulation sand grain motion trajectory diagram of the utility model;

[0026] Fig.12 It is a linear outlet pressure-flow relationship curve diagram of the utility model;

[0027] Fig.13 It is a pressure-flow relationship curve diagram of the first and third side outlets of the utility model;

[0028] Fig.14 This is a pressure-flow relationship curve diagram of the third side outlet of the utility model.

[0029] In the figure: flow channel 1, flow channel unit 2, cover plate 3, limit plate 4, water blocking block 5, energy dissipation cavity 101, water inlet 102, water outlet 103, limit groove 104, lower limit hole 105, slide groove 106, base 201, annular energy dissipation flow channel 202, sharp tooth protrusion 203, water dividing body 204, water inlet and outlet 205, limit protrusion 301, upper limit hole 302. DETAILED DESCRIPTION

[0030] like Figures 1 to 6As shown, a modular flow channel device with energy dissipation and anti-blocking performance includes a flow channel 1, an energy dissipation cavity 101 is provided in the flow channel 1, and multiple groups of flow channel units 2 are arranged in the energy dissipation cavity 101. The flow channel unit 2 includes a base 201, and an annular energy dissipation flow channel 202 is provided on the upper side of the base 201. A plurality of sharp tooth protrusions 203 are provided on the inner walls of both sides of the energy dissipation flow channel 202. The sharp tooth protrusions 203 on both sides are arranged alternately, and the sharp tooth protrusions 203 are distributed along the annular energy dissipation flow channel 202. The annular energy dissipation flow channel 202 is arranged around the water diversion body 204, and water inlets and outlets 205 are arranged around the annular energy dissipation flow channel 202. In this embodiment, four groups of water inlets and outlets 205 are arranged, respectively arranged in the front, rear, left and right directions of the annular energy dissipation flow channel 202, and the annular energy dissipation flow channels 202 of adjacent flow channel units 2 are connected and connected through adjacent water inlets and outlets 205. Two groups of annular energy dissipation flow channels 202 may be provided on the base 201, and the two groups of annular energy dissipation flow channels 202 are connected through the water inlet and outlet 205. A water inlet 102 is provided at one end of the flow channel 1, and the water inlet 102 is provided at the bottom of the flow channel 1, and the water inlet 102 is connected with the water inlet and outlet 205 of the flow channel unit 2 provided at the end, and a plurality of water outlets 103 are provided on the side wall of the flow channel 1, and the water inlet and outlet 205 on the side of the flow channel unit 2 provided on the boundary of the energy dissipation cavity 101 are connected with the corresponding water outlet 103.

[0031] In this embodiment, the flow channel 1 is a "T"-shaped structure. In the "I"-shaped area at the water inlet end, the flow channel units 2 are arranged in a single row, and at the other end of the flow channel 1, the flow channel units 2 are distributed in an array.

[0032] In this embodiment, the specific dimensions of the device are that the overall depth of the water inlet and outlet 205 and the annular energy dissipation channel 202 is 0.6 mm, and to ensure that the water can flow smoothly into the annular energy dissipation channel 202, the angle of the sharp tooth protrusion 203 is 50°, and the water gap is 1 mm wide. The total height of a single flow channel unit 2 is 1.4 mm, the length is 16 mm, and the width is 8 mm.

[0033] When water flows through the energy dissipation channel 202, it flows in from the water inlet and outlet 205 at one end, and the water diversion body 204 divides the water flow into two water flow channels. The water flow at the water inlet and outlet 205 vertically hits the front water surface of the water diversion body 204, consuming part of the energy; the sharp tooth protrusions 203 on the two side walls of the energy dissipation channel 202 are alternately arranged to make the water flow bend and increase the turbulence effect; after the two water flow channels flow in a bend, they hit each other and merge on the back water surface of the water diversion body 204, and this process consumes a lot of energy.

[0034] like Figure 1 , Figure 3 and Figure 7As shown, a cover plate 3 is provided on the upper side of the flow channel 1, a limiting groove 104 is provided on the upper side of the flow channel 1, and a limiting protrusion 301 cooperating with the limiting groove 104 is provided on the lower side of the cover plate 3. The energy dissipation cavity 101 in the flow channel 1 is closed by providing the cover plate 3, and the cooperation between the limiting protrusion 301 and the limiting groove 104 prevents the cover plate 3 from moving horizontally.

[0035] Preferably, the upper side wall of the flow channel 1 is provided with a plurality of lower limit holes 105, and the limit protrusion 301 is provided with upper limit holes 302 corresponding to the lower limit holes 105, and the limit plate 4 simultaneously penetrates the lower limit holes 105 and the upper limit holes 302 to limit the cover plate 3. By simultaneously inserting the limit plate 4 into the lower limit hole 105 and the upper limit hole 302, the cover plate 3 is limited up and down.

[0036] Some of the water outlets 103 are provided with water blocking blocks 5, and the water outlets 103 are blocked or sealed by the water blocking blocks 5, so that a certain number of water outlets 103 can be selectively blocked and closed, thereby adjusting the flow rate of the flow channel device.

[0037] In specific use, the flow channel 1 is provided with a chute 106 on the outside, and the chute 106 can be set as a T-shaped groove or a dovetail groove. A slider matched with the chute 106 is provided at the bottom of the water blocking block 5. The water blocking block 5 moves along the chute 106 to the position of the water outlet 103 to block water at the water outlet 103. By moving the water blocking block 5 along the chute 106, by moving the water blocking block 5 to the position of the water outlet 103 or away from the water outlet 103, the water outlet 103 can be closed or opened.

[0038] The working principle of this device is as follows:

[0039] When the water flows through the flow channel unit 2, the water flow is divided into two water flow channels by the water diversion body 204. The water flow at the water inlet and outlet 205 of the water inlet end of the flow channel unit 2 vertically hits the water face of the water diversion body 204, consuming part of the energy; the sharp tooth protrusions 203 on the two side walls of the annular energy dissipation flow channel 202 are alternately arranged to make the water flow bend and flow, increasing the turbulence effect; after the two water flow channels flow in a bend, they form a collision and merge on the back surface of the water diversion body 204, and this process consumes a lot of energy; the water flow is again offset and dissipated at the tail end of the annular energy dissipation flow channel 202, and then merges into a stream to the next unit, consuming part of the energy. In the whole process, the water flow is constantly divided, merged and hit, forming a good turbulence effect, realizing the consumption of water flow energy, and because the water flow maintains a high-speed flow in the annular energy dissipation flow channel 202, it is conducive to the water flow carrying sediment particles out, and improving the anti-blocking performance of the flow channel device.

[0040] As attached Figures 8 and 9As shown, the utility model uses fluent software close to the actual situation for numerical simulation, and simulates the fluid velocity distribution in the local flow channel of the flow channel device. By observing the velocity vector diagram, it can be seen that the water flow has a strong impact at the sharp tooth protrusion 203, and the two water flows at the end of the annular energy dissipation flow channel 202 have an impact, which increases the energy consumption of the water flow. The design of the long-distance energy dissipation flow channel increases the turbulence effect of the flow channel, doubles the energy dissipation effect, and greatly improves the hydraulic performance of the flow channel device.

[0041] As attached Fig.10 As shown, the utility model adopts fluent software which is close to the actual situation to carry out numerical simulation, and simulates the fluid velocity distribution in the local flow channel of the flow channel device. By observing the streamline diagram, it can be clearly seen that obvious vortices are generated in the pointed tooth protrusions 203 of the flow channel unit 2, which can greatly enhance the turbulent intensity of the water flow in the flow channel, which is beneficial to enhance the hydraulic performance of the flow channel device; the water flow maintains high-speed flow in the annular energy dissipation flow channel 202, which is beneficial to the water flow carrying mud and sand particles out, and improves the anti-clogging performance of the flow channel device.

[0042] As attached Fig.11 As shown in the figure, the discrete phase model of the fluent software is used, and the viscosity model uses the RNG k-ε model, which can well handle flows with large streamline curvature. The sand particle size is set to 0.1 mm and the density is 2500 g / m 3 , the sediment content is 1%. It can be clearly seen from the particle trajectory diagram that the sediment particles can be discharged smoothly out of the flow channel, it is difficult for sediment to accumulate in the flow channel, and the flow channel device has good anti-blocking performance.

[0043] There are two main forms of energy dissipation in flow channel devices, one is counter-flow energy dissipation, and the other is vortex energy dissipation. The utility model combines counter-flow energy dissipation and vortex energy dissipation to dissipate energy together. The existence of vortex will cause sediment to accumulate in the same position for a long time, making it difficult to discharge from the flow channel. Therefore, the utility model adopts a modular division method of the flow channel unit 2, which is convenient for cleaning and replacement at any time. The combination of water flow counter-flow and vortex energy dissipation brings the hydraulic performance of the flow channel device to the best.

[0044] As attached Figures 12-14 As shown, the utility model uses fluent software close to the actual situation to perform numerical simulation, simulates the fluid velocity distribution in the local flow channel of the flow channel device, and obtains the pressure-flow relationship curve at different outlets. Figures 12-13The horizontal axis is the working pressure H (m) at the water inlet, and the vertical axis is the water outlet flow rate Q (L / h). It can be obtained that the flow indexes of the straight outlet, the first side outlet, and the third side outlet are 0.5024, 0.5014, and 0.5016, respectively, which meet the hydraulic performance requirements of the flow channel device. The hydraulic performance is good and the energy consumption effect of the flow channel unit is obvious.

[0045] Compared with the existing labyrinth flow channel, the flow channel of the modular flow channel device with energy dissipation and anti-clogging performance provided in this embodiment is designed with a long distance energy dissipation flow channel, which improves the uniformity of water discharge from the flow channel device, has a good energy dissipation effect, and significantly improves the hydraulic performance.

Claims

1. A modular flow channel device with energy dissipation and anti-blocking performance, characterized in that: The invention comprises a flow channel (1), wherein an energy dissipation cavity (101) is provided in the flow channel (1), wherein a plurality of flow channel units (2) are arranged in the energy dissipation cavity (101), wherein the flow channel units (2) comprise a base (201), wherein an annular energy dissipation flow channel (202) is provided on the upper side of the base (201), wherein a sharp tooth protrusion (203) is provided on the inner wall of the energy dissipation flow channel (202), wherein the annular energy dissipation flow channel (202) is arranged around a water diversion body (204), and wherein water inlets and outlets (203) are provided around the annular energy dissipation flow channel (202). 5), the annular energy dissipation flow channels of adjacent flow channel units (2) are connected via water inlets and outlets (205), a water inlet (102) is provided at one end of the flow channel (1), the water inlet (102) is connected to the water inlet and outlet (205) of the flow channel unit (2) arranged at the end, a plurality of water outlets (103) are provided on the side wall of the flow channel (1), and the water inlets and outlets (205) on the side of the flow channel unit (2) arranged on the boundary of the energy dissipation cavity (101) are connected to the corresponding water outlets (103).

2. A modular flow channel device with energy dissipation and anti-blocking performance according to claim 1, characterized in that: A cover plate (3) is provided on the upper side of the flow channel (1), a limiting groove (104) is provided on the upper side of the flow channel (1), and a limiting protrusion (301) cooperating with the limiting groove (104) is provided on the lower side of the cover plate (3).

3. A modular flow channel device with energy dissipation and anti-blocking performance according to claim 2, characterized in that: The upper side wall of the flow channel (1) is provided with a plurality of lower limit holes (105), the limit protrusion (301) is provided with upper limit holes (302) corresponding to the lower limit holes (105), and the limit plate (4) simultaneously penetrates the lower limit holes (105) and the upper limit holes (302) to limit the cover plate (3).

4. A modular flow channel device with energy dissipation and anti-blocking performance according to claim 1, characterized in that: Some of the water outlets (103) are provided with water blocking blocks (5).

5. A modular flow channel device with energy dissipation and anti-blocking performance according to claim 4, characterized in that: The flow channel (1) is provided with a slide groove (106) on the outside, and the bottom of the water blocking block (5) is provided with a sliding block that matches the slide groove (106). The water blocking block (5) moves along the slide groove (106) to the position of the water outlet (103) to block water from the water outlet (103).

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