Inlet slurry rectifying device of horizontal slurry pump

Abstract

The utility model provides an inlet slurry rectifying device of a horizontal slurry pump, which belongs to the technical field of horizontal slurry pumps and comprises a rectifying pipeline, the rectifying pipeline comprises a middle pipeline and two guide pipelines, the two guide pipelines are symmetrically connected to two ends of the middle pipeline, conical guide holes are arranged in the guide pipelines, and the middle pipeline is provided with a plurality of guide holes. The inner diameter of the conical guide hole is gradually decreased from the side away from the middle pipeline to the side close to the middle pipeline, a plurality of guide plates are arranged on the inner wall of the conical guide hole in the circumferential direction, a flow guide gap is formed between every two adjacent guide plates, and a rectifying grating is arranged in the middle pipeline and provided with a plurality of rectifying channels which are formed in the axial direction of the middle pipeline. And the plurality of rectification channels are arranged in one-to-one correspondence with the plurality of flow guide gaps of any guide pipeline. According to the inlet slurry rectifying device of the horizontal slurry pump, the impact effect of slurry on the impeller is greatly relieved, abrasion of the slurry on the impeller is reduced, and the frequency of shutdown maintenance and replacement is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of horizontal slurry pumps, and more specifically relates to an inlet slurry rectifying device for a horizontal slurry pump. Background Art

[0002] Horizontal slurry pump is one of many types of slurry pumps. It is immersed in liquid and used to transport abrasive, coarse particles, and high-concentration slurry. Horizontal slurry pump is suitable for working in various harsh environmental conditions and is commonly used in coal mining, chemical industry and other industries.

[0003] Since the slurry contains solid particles of various sizes, its movement trajectory is chaotic when it is transported in the external pipeline. As a result, the impact position of the slurry on the impeller cannot be determined when it reaches the inlet of the slurry pump, causing the impeller to be damaged too quickly, requiring frequent shutdowns for inspection and replacement, and causing huge losses to the entire production. Utility Model Content

[0004] The utility model aims to provide a slurry straightening device for the inlet of a horizontal slurry pump, aiming to solve the problem that when the slurry reaches the inlet of the slurry pump, the impact position on the impeller cannot be determined, resulting in excessive damage to the impeller, requiring frequent shutdowns for inspection and replacement, and causing huge losses to the entire production.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a horizontal slurry pump inlet slurry straightening device, including a straightening pipe connected between the slurry pump inlet pipe and the external pipe, the straightening pipe including an intermediate pipe and two guide pipes, the two guide pipes are symmetrically connected to the two ends of the intermediate pipe and respectively connect the slurry pump inlet pipe and the external pipe, the guide pipe has a conical guide hole inside, the inner diameter of the conical guide hole decreases from the side away from the intermediate pipe to the side close to the intermediate pipe, a plurality of guide plates are circumferentially arranged on the inner wall of the conical guide hole, and a guide gap is formed between adjacent guide plates, a straightening grid is arranged in the intermediate pipe, the straightening grid has a plurality of straightening channels, the straightening channels are opened along the axial direction of the intermediate pipe, and the plurality of straightening channels and the plurality of guide gaps between the guide plates are arranged one by one.

[0006] In a possible implementation, a rectifying inner tube is arranged in the intermediate tube, the rectifying grid is arranged inside the rectifying inner tube, a plurality of guide edges are arranged circumferentially on the outer wall of the rectifying inner tube, the guide edges are arranged along the axial direction of the rectifying inner tube, a plurality of guide grooves are arranged circumferentially on the inner wall of the intermediate tube, and the plurality of guide edges are slidably arranged in the plurality of guide grooves in a one-to-one corresponding manner.

[0007] In a possible implementation, the rectifying grid includes a transverse plate and a longitudinal plate, both ends of the transverse plate and both ends of the longitudinal plate are respectively connected to the inner wall of the rectifying inner tube, and the transverse plate and the longitudinal plate are vertically staggered.

[0008] In a possible implementation, the length of the rectifying inner tube is the same as that of the intermediate tube, and the outer diameter of the rectifying inner tube is larger than the inner diameter of the guide tube at one end close to the intermediate tube.

[0009] In a possible implementation manner, the inner diameter of the rectifying inner pipe is the same as the inner diameter of the guide pipe at one end close to the intermediate pipe.

[0010] In a possible implementation, the guide pipe includes a first pipe section, an intermediate pipe section and a second pipe section, the intermediate pipe section is a tapered pipe with equal wall thickness, the tapered guide hole is located inside the intermediate pipe section, the first pipe section and the second pipe section are both straight pipes with equal wall thickness, the first pipe section is located on a side close to the intermediate pipe, the second pipe section is located on a side away from the intermediate pipe, and the inner diameter of the first pipe section is smaller than the inner diameter of the second pipe section.

[0011] In a possible implementation manner, the first pipe segment, the middle pipe segment, and the second pipe segment are integrally formed.

[0012] In a possible implementation, the inner end surface of the guide plate is inclined, and the inclination direction is consistent with the inclination direction of the inner wall of the tapered guide hole.

[0013] In a possible implementation, both ends of the intermediate pipe and both ends of the guide pipe are respectively provided with connecting flanges.

[0014] The utility model provides a horizontal slurry pump inlet slurry rectification device with the beneficial effect that: compared with the prior art, the slurry in the external pipe is mixed with solid particles of various sizes, and the movement trajectory of the slurry is disorderly. When the slurry passing through the external pipe passes through a guide pipe, an intermediate pipe and another guide pipe in sequence, the slurry with a disorderly movement trajectory forms a rapid and smooth movement trajectory under the action of the tapered guide hole and the guide gap after passing through the first guide pipe, and enters another guide pipe after being rectified by the rectification grid of the intermediate pipe. Under the action of the tapered guide hole and the guide gap, the slurry forms a slow and smooth movement trajectory and enters the inlet pipe of the slurry pump, and finally enters the flow chamber of the horizontal slurry pump. At this time, the impact of the slurry on the impeller will be greatly slowed down, reducing the wear of the slurry on the impeller and reducing the number of shutdowns for inspection and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a slurry rectifying device for an inlet of a horizontal slurry pump provided in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Sectional view along AA;

[0018] Figure 3 for Figure 1 Cross-sectional view along BB.

[0019] Description of reference numerals:

[0020] 100, slurry pump inlet pipe; 200, external pipe; 300, intermediate pipe; 400, guide pipe; 410, first pipe section; 420, intermediate pipe section; 430, second pipe section; 440, guide plate; 500, rectifier inner pipe; 510, guide rib; 520, rectifier grid; 600, connecting flange. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0023] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0024] See also Figures 1 to 3 Now, a slurry rectifying device for the inlet of a horizontal slurry pump provided by the utility model is described. A slurry rectifying device for the inlet of a horizontal slurry pump comprises a rectifying pipe connected between an inlet pipe 100 of the slurry pump and an external pipe 200, the rectifying pipe comprises an intermediate pipe 300 and two guide pipes 400, the two guide pipes 400 are symmetrically connected at both ends of the intermediate pipe 300 and respectively connect the inlet pipe 100 of the slurry pump and the external pipe 200, the guide pipe 400 has a conical guide hole inside, the inner diameter of the conical guide hole decreases from the side away from the intermediate pipe 300 to the side close to the intermediate pipe 300, a plurality of guide plates 440 are arranged circumferentially on the inner wall of the conical guide hole, and a flow guide gap is formed between adjacent guide plates 440, a rectifying grid 520 is arranged in the intermediate pipe 300, the rectifying grid 520 has a plurality of rectifying channels, the rectifying channels are opened along the axial direction of the intermediate pipe 300, and the plurality of rectifying channels and the plurality of flow guide gaps between the guide plates 440 are arranged one by one.

[0025] The utility model provides a slurry rectification device for the inlet of a horizontal slurry pump. Compared with the prior art, the slurry in the external pipe 200 is mixed with solid particles of various sizes, and the movement trajectory of the slurry is chaotic. When the slurry passing through the external pipe 200 passes through a guide pipe 400, an intermediate pipe 300 and another guide pipe 400 in sequence, the slurry with a chaotic movement trajectory forms a rapid and smooth movement trajectory under the action of the tapered guide hole and the guide gap after passing through the first guide pipe 400. After being rectified by the rectification grid 520 of the intermediate pipe 300, it enters another guide pipe 400. Under the action of the tapered guide hole and the guide gap, the slurry forms a slow and smooth movement trajectory and enters the inlet pipe 100 of the slurry pump, and finally enters the flow chamber of the horizontal slurry pump. At this time, the impact of the slurry on the impeller will be greatly slowed down, reducing the wear of the slurry on the impeller and reducing the number of shutdowns for inspection and replacement.

[0026] See also Figure 2 A rectifying inner tube 500 is arranged in the intermediate pipe 300, a rectifying grid 520 is arranged inside the rectifying inner tube 500, a plurality of guide ribs 510 are arranged circumferentially on the outer wall of the rectifying inner tube 500, the guide ribs 510 are arranged along the axial direction of the rectifying inner tube 500, a plurality of guide grooves are arranged circumferentially on the inner wall of the intermediate pipe 300, and the plurality of guide ribs 510 are slidably arranged in the plurality of guide grooves in a one-to-one correspondence.

[0027] Among them, the number of guide ribs 510 is three, and the three guide ribs 510 are integrally formed on the outer wall of the rectifier inner tube 500. The guide ribs 510 slide in a one-to-one correspondence with the guide grooves on the inner wall of the intermediate pipe 300, which can prevent the rectifier inner tube 500 from rotating relative to the intermediate pipe 300, and avoid the guide channel formed by the rectifier grid 520 and the guide gap formed by the adjacent guide plate from hindering the smooth flow of the slurry.

[0028] Specifically, the rectifying grid 520 includes a horizontal plate and a vertical plate, and both ends of the horizontal plate and the vertical plate are respectively connected to the inner wall of the rectifying inner tube 500, and the horizontal plate and the vertical plate are vertically staggered. The horizontal plate and the vertical plate are integrally formed inside the rectifying inner tube 500, and the horizontal plate, the vertical plate and the inner wall of the rectifying inner tube 500 together constitute the above-mentioned rectifying channel, so that the slurry passing through the rectifying channel can achieve regular flow.

[0029] The length of the rectifying inner tube 500 is the same as that of the intermediate pipe 300. When the rectifying inner tube 500 is assembled to the intermediate pipe 300, both ends of the rectifying inner tube 500 and the intermediate pipe 300 are flush with each other. The outer diameter of the rectifying inner tube 500 is larger than the inner diameter of the end of the guide pipe 400 close to the intermediate pipe 300. The end surface of the guide pipe 400 close to the intermediate pipe 300 is used to limit the rectifying inner tube 500, so as to prevent the rectifying inner tube 500 from axial displacement relative to the intermediate pipe 300.

[0030] The inner diameter of the rectifying inner tube 500 is the same as the inner diameter of the guide pipe 400 near the middle pipe 300, so as to avoid the appearance of a step at the internal joint of the rectifying inner tube 500 and the guide pipe 400, which would cause the slurry to change its motion trajectory when passing through this position.

[0031] See also Figure 1 The guide pipe 400 includes a first pipe section 410, an intermediate pipe section 420 and a second pipe section 430. The intermediate pipe section 420 is a tapered pipe with equal wall thickness. The tapered guide hole is located inside the intermediate pipe section 420. The inner cavity of the intermediate pipe section 420 forms a guide structure. The first pipe section 410 and the second pipe section 430 are both straight pipes with equal wall thickness. The first pipe section 410 is located on the side close to the intermediate pipe 300, and the second pipe section 430 is located on the side away from the intermediate pipe 300. The inner diameter of the first pipe section 410 is smaller than the inner diameter of the second pipe section 430. The first pipe section 410 and the second pipe section 430 form a connection structure on both sides. Preferably, the first pipe section 410, the intermediate pipe section 420 and the second pipe section 430 are integrally formed.

[0032] See also Figure 3 The inner end surface of the guide plate 440 is inclined, and the inclination direction is consistent with the inclination direction of the inner wall of the tapered guide hole. The height of the guide plate 440 in the length direction is kept consistent to ensure the guiding effect on the slurry.

[0033] In addition, both ends of the intermediate pipeline 300 and the guide pipeline 400 are respectively provided with connection flanges 600. The intermediate pipeline 300 and the guide pipeline 400 are detachably connected through the connection flanges 600 and bolts. At the same time, the guide pipeline 400 is also detachably connected with the slurry pump inlet pipe 100 and the rectifying pipeline through the connection flanges 600 and bolts.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A slurry rectifying device for the inlet of a horizontal slurry pump, characterized in that: The invention comprises a rectifying pipeline connected between a slurry pump inlet pipe (100) and an external pipe (200), wherein the rectifying pipeline comprises an intermediate pipe (300) and two guide pipes (400), wherein the two guide pipes (400) are symmetrically connected to the two ends of the intermediate pipe (300) and are respectively connected to the slurry pump inlet pipe (100) and the external pipe (200), wherein the guide pipe (400) has a tapered guide hole inside, and the inner diameter of the tapered guide hole increases from the side away from the intermediate pipe (300) to the side away from the intermediate pipe (300). The angle of the conical guide hole decreases toward a side close to the intermediate pipe (300), a plurality of guide plates (440) are circumferentially arranged on the inner wall of the conical guide hole, and a flow guide gap is formed between adjacent guide plates (440). A flow rectifying grid (520) is arranged in the intermediate pipe (300), and the flow rectifying grid (520) has a plurality of flow rectifying channels, and the flow rectifying channels are opened along the axial direction of the intermediate pipe (300). The plurality of flow rectifying channels and the plurality of flow guide gaps between the guide plates (440) are arranged in a one-to-one correspondence.

2. A slurry rectifying device for the inlet of a horizontal slurry pump according to claim 1, characterized in that: A rectifying inner tube (500) is arranged in the intermediate tube (300), the rectifying grid (520) is arranged inside the rectifying inner tube (500), a plurality of guide edges (510) are arranged circumferentially on the outer wall of the rectifying inner tube (500), the guide edges (510) are arranged along the axial direction of the rectifying inner tube (500), a plurality of guide grooves are arranged circumferentially on the inner wall of the intermediate tube (300), and the plurality of guide edges (510) are slidably arranged in the plurality of guide grooves in a one-to-one correspondence.

3. A slurry rectifying device for the inlet of a horizontal slurry pump as claimed in claim 2, characterized in that: The rectifying grid (520) comprises a transverse plate and a longitudinal plate, two ends of the transverse plate and two ends of the longitudinal plate are respectively connected to the inner wall of the rectifying inner tube (500), and the transverse plate and the longitudinal plate are vertically staggered.

4. A slurry rectifying device for the inlet of a horizontal slurry pump as claimed in claim 2, characterized in that: The length of the rectifying inner tube (500) is the same as that of the intermediate tube (300), and the outer diameter of the rectifying inner tube (500) is greater than the inner diameter of the end of the guide tube (400) close to the intermediate tube (300).

5. A slurry rectifying device for the inlet of a horizontal slurry pump as claimed in claim 4, characterized in that: The inner diameter of the rectifying inner tube (500) is the same as the inner diameter of the end of the guide pipe (400) close to the intermediate pipe (300).

6. The slurry rectifying device for the inlet of a horizontal slurry pump according to claim 1, characterized in that: The guide pipe (400) comprises a first pipe section (410), an intermediate pipe section (420) and a second pipe section (430); the intermediate pipe section (420) is a tapered pipe with a constant wall thickness; the tapered guide hole is located inside the intermediate pipe section (420); the first pipe section (410) and the second pipe section (430) are both straight pipes with a constant wall thickness; the first pipe section (410) is located on a side close to the intermediate pipe (300) and the second pipe section (430) is located on a side away from the intermediate pipe (300); the inner diameter of the first pipe section (410) is smaller than the inner diameter of the second pipe section (430).

7. A slurry rectifying device for the inlet of a horizontal slurry pump according to claim 6, characterized in that: The first pipe section (410), the middle pipe section (420) and the second pipe section (430) are integrally formed.

8. The slurry rectifying device for the inlet of a horizontal slurry pump according to claim 1, characterized in that: The inner end surface of the guide plate (440) is arranged to be inclined, and the inclination direction is consistent with the inclination direction of the inner wall of the tapered guide hole.

9. The slurry rectifying device for the inlet of a horizontal slurry pump according to claim 1, characterized in that: Both ends of the intermediate pipe (300) and both ends of the guide pipe (400) are respectively provided with connection flanges (600).

Images