Anti-reflux delivery pipe

Abstract

The utility model discloses an anti-backflow conveying pipe which comprises a conveying main pipe, a liquid inlet and a slurry inlet. The liquid inlet and the slurry inlet are vertically communicated with the conveying channel of the conveying main pipe; and an anti-reflux baffle is arranged below the slurry inlet and divides the conveying channel into a slurry conveying channel and a liquid conveying channel. The anti-backflow baffle is arranged in the conveying main pipe, the feeding pressure of slurry is transferred forwards, it is avoided that the slurry is reversely discharged from the liquid inlet due to the pressure difference between the slurry and the liquid inlet, the conveying channel is divided into two parts through the anti-backflow baffle, the upper layer serves as a slurry conveying channel, the conveying pressure is large, and the lower layer serves as an overflow liquid conveying channel. The conveying pressure is small, and the slurry and the overflow liquid are communicated again in front of the mixing outlet of the conveying channel, so that the slurry and the overflow liquid are independently conveyed and finally mixed in the conveying main pipe, and the solid-liquid separation efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of setting tank and thickener spare and parts, concretely relates to a prevent backflow conveying pipe. BACKGROUND

[0002] Thickener and setting tank are common solid-liquid separation equipment in chemical field, and the setting tank and thickener in close proximity are connected by pipeline to convey the material circulating in the main body of the equipment, and the turbidity and clear liquid are mixed in multiple thickeners or setting tanks multiple times, and then are settled and separated to achieve the effect of final solid-liquid separation. In the traditional equipment, the transfer of turbidity and clear liquid is through the mode of pumping, and the fluid has a large pressure and will not appear backflow of turbidity into the clear liquid pipeline. With the improvement of the stepped distribution of the setting tank, the clear liquid enters the next setting tank in a more energy-saving overflow mode, and the turbidity still enters through pumping, and the ordinary pipeline is used to convey the clear liquid and turbidity, and there is a risk that the pumped turbidity enters the previous setting tank through the clear liquid overflow pipeline. In order to avoid the occurrence of the situation, a suitable pipeline structure needs to be provided to solve the technical problem. SUMMARY

[0003] The utility model provides a prevent backflow conveying pipe for solving the deficiency described in the prior art.

[0004] The utility model adopts the technical scheme that:

[0005] A prevent backflow conveying pipe, including conveying main pipe, liquid inlet and slurry inlet, the liquid inlet and the slurry inlet are perpendicular with the conveying channel of the conveying main pipe, and the prevent backflow baffle is arranged below the slurry inlet, and the prevent backflow baffle divides the conveying channel into the sludge conveying channel and the liquid conveying channel. The liquid inlet and the slurry inlet are located at the same side of the conveying main pipe, and the liquid inlet is used to receive the upper overflow liquid, and the slurry inlet is used to receive the pumped slurry, and due to the arrangement of the prevent backflow baffle, the slurry is conveyed along the upper conveying channel and is quickly discharged from the conveying main pipe, and the possibility of entering the liquid inlet is reduced as much as possible.

[0006] As a preferred scheme of the utility model, the maximum depth of the sludge conveying channel does not exceed half of the depth of the conveying channel. It is used to control the conveying amount of the slurry and is suitable for the conveying amount of the liquid.

[0007] As a preferred scheme of the utility model, the end part of the prevent backflow baffle extends beyond the slurry inlet, and the slurry pumped by the slurry inlet directly washes on the prevent backflow baffle and is conveyed along the extension direction of the prevent backflow baffle.

[0008] As a preferred scheme of the utility model, the starting end part of the prevent backflow baffle is located between the liquid inlet and the slurry inlet. The liquid inlet and the slurry inlet are separated to avoid the slurry entering the liquid inlet.

[0009] As a preferred scheme of the utility model, the anti-backflow baffle comprises an arc-shaped plate and a straight plate, the arc-shaped plate is arranged obliquely, and arc-shaped side end surfaces of the arc-shaped plate are welded to the inner wall of the conveying channel; the linear side end part of the arc-shaped plate is welded to the straight plate, and the straight plate is arranged in parallel to the axis of the conveying channel; and the side end part of the straight plate is welded to the inner wall of the conveying channel. The upper end surface of the arc-shaped plate, the upper end surface of the straight plate and the inner wall of the conveying channel form a slurry conveying channel; the lower end surface of the arc-shaped plate, the lower end surface of the straight plate and the inner wall of the conveying channel form a liquid conveying channel;

[0010] As a preferred scheme of the utility model, the welding part of the arc-shaped plate and the straight plate is located on the axis of the slurry inlet.

[0011] As a preferred scheme of the utility model, a liquid inlet pipe is welded to the liquid inlet, and a slurry inlet pipe is welded to the slurry inlet, and flanges are welded to the liquid inlet end part of the liquid inlet pipe and the slurry inlet end part of the slurry inlet pipe. The liquid inlet and the slurry inlet are both openings with bevels, which are directly formed on the side wall of the conveying main pipe, the liquid inlet pipe is full-welded at the liquid inlet, the slurry inlet pipe is full-welded at the slurry inlet, and the height of the welding seam is not less than 70% of the thickness of the pipe wall.

[0012] As a preferred scheme of the utility model, a flange is welded to the end part of the mixed outlet of the conveying channel, and the end part of the conveying channel close to the liquid inlet is closed. The flange can be welded on site at the construction site or welded in advance.

[0013] The utility model sets up the anti-backflow baffle in the conveying main pipe, shifts the feeding pressure of the slurry forward, avoids the pressure difference at the liquid inlet from causing the slurry to be discharged reversely from the liquid inlet, and separates the conveying channel into two parts by the anti-backflow baffle, the upper layer is used as the slurry conveying channel and has a large conveying pressure, the lower layer is used as the overflow liquid conveying channel and has a small conveying pressure, and the two parts are reconnected before the mixed outlet of the conveying channel, so that the slurry and the overflow liquid are independently conveyed and finally mixed in the conveying main pipe, and the efficiency and quality of the solid-liquid separation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Figure 1 It is the front view of the utility model.

[0016] Figure 2 It is Figure 1 It is the sectional view along A-A direction.

[0017] Figure 3 is a top view of the present application.

[0018] Figure 4 is a structural schematic view of the arc-shaped plate of the present application.

[0019] Figure 5 is a structural schematic view of the flat plate of the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0021] Embodiment:

[0022] A kind of anti-reflux conveying pipe, as shown in Figures 1-3 It includes conveying main pipe 1, liquid inlet 2 and pulp inlet 3;Liquid inlet 2 and pulp inlet 3 are vertically communicated with the conveying channel of conveying main pipe 1, the mixed outlet end of the conveying channel is welded with flange 7, and the end of the conveying channel close to the liquid inlet is closed.Flange can be welded on site in construction site, it can also be welded in advance, the position of the conveying channel close to the mixed outlet end is provided with necking portion 8, of course, it can also not have necking portion, use expansion neck or original pipe diameter, and the conveying main pipe can be circular pipe, square pipe and any shape of pipeline, as long as it can complete conveying, not limited to the shape of pipeline, this embodiment is only taken as an example to demonstrate.

[0023] In this embodiment, the liquid inlet and the pulp inlet are located on the same side of the conveying main pipe, and both are directly provided on the side wall of the conveying main pipe, which is a bevel with a certain slope;The liquid inlet is used to receive the overflow liquid from the upper layer, and the pulp inlet is used to receive the pumped slurry.

[0024] In order to accurately and quickly enter liquid and pulp, as shown in Figure 1 Liquid inlet pipe 5 is welded on liquid inlet 2, and flange 7 is welded on the liquid inlet end of liquid inlet pipe 5;Pulp inlet pipe 6 is welded on pulp inlet 3, and flange 7 is welded on the pulp inlet end of pulp inlet pipe 6.Both the liquid inlet and the pulp inlet are openings with bevels, which are directly provided on the side wall of the conveying main pipe, the liquid inlet pipe is fully welded at the liquid inlet, the pulp inlet pipe is fully welded at the pulp inlet, and the height of the weld is not less than 70% of the thickness of the pipe wall.

[0025] Because the slurry delivery pressure is higher than the overflow liquid delivery pressure, a backflow prevention baffle is installed below the slurry inlet 3 to prevent slurry from discharging from the liquid inlet. The backflow prevention baffle separates the delivery channel into the slurry delivery channel 1-1-1 and the liquid delivery channel 1-1-2. Due to the installation of the backflow prevention baffle, slurry is transported along the upper delivery channel and quickly discharged from the delivery main, minimizing the possibility of slurry entering the liquid inlet.

[0026] And the maximum depth of the mud conveying channel 1-1-1 shall not exceed half of the conveying channel depth, such as Figure 1 and 2 As shown, it is used to control the slurry delivery volume and adapt the appropriate liquid delivery volume.

[0027] The starting end of the anti-backflow baffle is located between the liquid inlet 2 and the slurry inlet 3. In this embodiment, the anti-backflow baffle is located between the liquid inlet 2 and the slurry inlet 3. Figure 1 As shown, the liquid inlet and the slurry inlet are separated to prevent the slurry from entering the liquid inlet. The end of the anti-backflow baffle extends beyond the slurry inlet 3, and the slurry pumped from the slurry inlet is directly flushed on the anti-backflow baffle and transported along the extension direction of the anti-backflow baffle.

[0028] As long as the liquid inlet and the slurry inlet can be separated and do not affect each other, the structure of the anti-backflow baffle is not limited. This embodiment takes the curved plate and the straight plate as an example to demonstrate that the anti-backflow baffle only has the curved plate 4-1 and the straight plate 4-2. Figure 3 and 4 As shown, the arc plate 4-1 is tilted, and the arc side end surface of the arc plate 4-1 is welded to the inner wall of the conveying channel; the straight side end of the arc plate 4-1 is welded to the straight plate 4-2, and the welding point between the arc plate 4-1 and the straight plate 4-2 is located on the axis of the slurry inlet 3. The straight plate 4-2 is arranged parallel to the axis of the conveying channel, as shown in FIG. Figure 1 、 2 As shown in Figure 5, the side end of the flat plate 4-2 is welded to the inner wall of the conveying channel. The upper end surface of the curved plate, the upper end surface of the flat plate, and the inner wall of the conveying channel form a mud conveying channel 1-1-1; the lower end surface of the curved plate, the lower end surface of the flat plate, and the inner wall of the conveying channel form a liquid conveying channel 1-1-2.

[0029] The pumped slurry enters from the slurry inlet pipe through the slurry inlet and enters the mud conveying channel for transportation. The overflowing slurry enters from the liquid inlet pipe through the liquid inlet and enters the liquid conveying channel for transportation. The overflowing slurry and the slurry are mixed and discharged near the end of the mixing outlet of the conveying channel.

[0030] In actual use, this anti-reflux delivery tube can be directly Figure 1 It can be installed in the direction shown, or it can be installed upside down or rotated at any angle, as long as the slurry can be transported, and it is applicable to any two fluids.

[0031] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, can make equivalent replacement or change, which should be included in the protection scope of the present application.

Claims

1. A backflow prevention conveying pipe, comprising a conveying main pipe (1), a liquid inlet (2) and a slurry inlet (3); the liquid inlet (2) and the slurry inlet (3) are vertically connected to the conveying channel of the conveying main pipe (1); characterized in that: An anti-backflow baffle is provided below the slurry inlet (3), and the anti-backflow baffle separates the conveying channel into a slurry conveying channel (1-1-1) and a liquid conveying channel (1-1-2).

2. The anti-reflux delivery tube according to claim 1, characterized in that: The maximum depth of the mud conveying channel (1-1-1) shall not exceed half the depth of the conveying channel.

3. The anti-reflux delivery tube according to claim 1 or 2, characterized in that: The end portion of the anti-backflow baffle extends beyond the pulp inlet (3).

4. The anti-reflux delivery tube according to claim 3, characterized in that: The starting end of the anti-backflow baffle is located between the liquid inlet (2) and the slurry inlet (3).

5. The anti-reflux delivery tube according to claim 4, characterized in that: The anti-backflow baffle comprises a curved plate (4-1) and a straight plate (4-2); the curved plate (4-1) is arranged obliquely, and the curved side end surface of the curved plate (4-1) is welded to the inner wall of the conveying channel; the straight side end of the curved plate (4-1) is welded to the straight plate (4-2), and the straight plate (4-2) is arranged parallel to the axis of the conveying channel; and the side end of the straight plate (4-2) is welded to the inner wall of the conveying channel.

6. The anti-reflux delivery tube according to claim 5, characterized in that: The welding point between the curved plate (4-1) and the straight plate (4-2) is located on the axis of the slurry inlet (3).

7. The anti-reflux delivery tube according to claim 4, characterized in that: A liquid inlet pipe (5) is welded to the liquid inlet (2), and a slurry inlet pipe (6) is welded to the slurry inlet (3); flanges (7) are welded to the liquid inlet end of the liquid inlet pipe (5) and the slurry inlet end of the slurry inlet pipe (6).

8. The anti-reflux delivery tube according to claim 7, characterized in that: A flange (7) is welded to the mixing outlet end of the delivery channel, and the end of the delivery channel close to the liquid inlet is closed.

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