Splicing type pneumatic conveying pipeline elbow

Abstract

The utility model relates to a splicing type pneumatic conveying pipeline elbow which comprises an inlet flange, an inlet straight pipe, an inlet transition pipe, an impact elbow, a wear-resisting elbow, an outlet transition pipe, an outlet straight pipe and an outlet flange which are sequentially connected, and a fastening hoop assembly is arranged outside a connecting port of the impact elbow and the wear-resisting elbow. The section of each of the impact elbow and the wear-resistant elbow is a special-shaped surface consisting of a semicircular structure at the upper half part and a semi-elliptical structure at the lower half part, the radius of the semicircular structure is equal to half of the length of the short axis of the semi-elliptical structure, and the ratio of the length of the long axis of the semi-elliptical structure to the radius of the semicircular structure is greater than 1.6. By arranging the special-shaped section form of the elbow, a vortex is formed when gas flows through the inlet transition pipe, and the vortex can collide with incoming flow, so that the speed of fluid is reduced, the impact force of materials on the turning part of the elbow is relieved, and the abrasion degree of the inner wall of the elbow is reduced; and the pipe section can be partially replaced when being partially damaged, so that the comprehensive service life of the elbow pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic conveying systems, in particular to a spliced ​​pneumatic conveying pipeline elbow. Background Art

[0002] Pneumatic conveying systems use negative pressure technology to transport granular materials within a closed conduit through a pre-laid piping system. Pneumatic conveying devices have a simple structure, consisting primarily of the pneumatic conveying pipeline and the pneumatic generator. They are easy to operate and can be used for horizontal, vertical, or inclined conveying. Their application continues to expand across various industries.

[0003] However, during the conveying process, there are frequent collisions between material particles and the pipe wall, causing erosion of the pipe, a corresponding change in the movement trajectory, and varying degrees of wear. Wear within the conveying pipe is mostly concentrated in the bends, and severe pipe wear can affect the service life and efficiency of the system. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and provides a spliced ​​pneumatic conveying pipeline elbow.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A spliced ​​pneumatic conveying pipe elbow comprises an inlet flange, an inlet straight pipe, an inlet transition pipe, an impact elbow, a wear-resistant elbow, an outlet transition pipe, an outlet straight pipe and an outlet flange, wherein the connection ports of the impact elbow and the wear-resistant elbow are provided with a fastening hoop assembly;

[0007] The cross-section of the impact bend and the wear-resistant bend are all special-shaped surfaces consisting of a semicircular structure in the upper half and a semi-elliptical structure in the lower half. The radius of the semicircular structure is equal to half of the length of the minor axis of the semi-elliptical structure, and the ratio of the major axis length of the semi-elliptical structure to the radius of the semicircular structure is greater than 1.6.

[0008] The cross sections of the inlet and outlet straight pipes are both circular structures;

[0009] The inlet end face of the inlet transition pipe is a circular structure corresponding to the cross section of the inlet straight pipe, and the outlet end face is a special-shaped surface corresponding to the cross section of the impact elbow;

[0010] The inlet end face of the outlet transition pipe is a special-shaped surface corresponding to the cross section of the wear-resistant elbow pipe, and the outlet end face is a circular structure corresponding to the cross section of the outlet straight pipe.

[0011] The inner circumference of the connecting end surface of the impact bend pipe facing the wear-resistant bend pipe is provided with a plurality of inner splicing bosses and the outer circumference is provided with a plurality of outer splicing bosses, and the inner splicing bosses and the outer splicing bosses are arranged alternately; the inner circumference of the connecting end surface of the wear-resistant bend pipe facing the impact bend pipe is provided with a plurality of inner splicing grooves and the outer circumference is provided with a plurality of outer splicing grooves, and the inner splicing grooves and the outer splicing grooves are arranged alternately; the inner splicing boss of the impact bend pipe is clamped in the inner splicing groove of the wear-resistant bend pipe, and the outer splicing boss of the impact bend pipe is clamped in the outer splicing groove of the wear-resistant bend pipe.

[0012] The height of the inner splicing boss and the outer splicing boss is 1 cm; the depth of the inner splicing groove and the outer splicing groove is 1 cm.

[0013] The fastening hoop assembly includes a fastening sleeve that is sleeved on the outside of the connection port of the impact bend and the wear-resistant bend. The cross-section of the fastening sleeve corresponds to the special-shaped surface of the impact bend and the wear-resistant bend. The fastening sleeve is an open structure with a fastening seam on the outer wall. Fastening plates are provided on both sides of the fastening seam of the fastening sleeve, and the two fastening plates are fixedly connected by bolts.

[0014] A rubber pad is provided between the inner wall of the fastening sleeve and the outer walls of the connection ports of the impact elbow and the wear-resistant elbow.

[0015] The inlet transition pipe is connected to the inlet straight pipe and the impact elbow by welding.

[0016] The wear-resistant elbow, outlet transition pipe and outlet straight pipe are an integrated structure.

[0017] The beneficial effects of the present invention are as follows: by setting the elbow with a special-shaped cross-section, the present invention forms a vortex when the gas flows through the inlet transition pipe, and the vortex can collide with the incoming flow, thereby reducing the speed of the fluid, making the fluid in this part flow slowly, reducing the impact force of the material on the turning point of the elbow, and reducing the wear of the inner wall of the elbow; when a part of the pipe section is damaged, it can also be partially replaced, thereby extending the comprehensive service life of the elbow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 This is the main view of the utility model;

[0020] Figure 3 is the cross-sectional view of the inlet straight pipe;

[0021] Figure 4 is a cross-sectional view of the impact bend;

[0022] Figure 5 This is a schematic diagram of the connection end faces of the impact elbow and the wear-resistant elbow;

[0023] Figure 6is a structural schematic diagram of a fastening hoop assembly;

[0024] Figure 7 This is the streamline cloud diagram inside the elbow of the transmission pipeline;

[0025] In the figure: 1-inlet flange; 2-inlet straight pipe; 3-inlet transition pipe; 4-impact elbow; 5-wear-resistant elbow; 6-outlet transition pipe; 7-outlet straight pipe; 8-outlet flange; 9-fastening hoop assembly;

[0026] 41-inner splicing boss; 42-outer splicing boss;

[0027] 51-inner splicing groove; 52-outer splicing groove;

[0028] 91-fastening sleeve; 92-fastening plate;

[0029] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples provided are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are all in a very simplified form and are not to exact proportions, and are only used to facilitate and clearly illustrate the embodiments of the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Computational fluid dynamics (CFD) can simulate the steady-state and transient flow of continuous fluids under specific conditions. It employs a variety of discretized mathematical methods to simulate and analyze various fluid phenomena and can be used to study the behavior of particles in pneumatic conveying. CFD simulations have shown that after entering a pipe bend, the material's movement within it can be divided into impact and collision zones and wall friction zones due to inertial forces and the guiding effect of the bend. These zones experience different types of damage. If a section of the pipe fails, the entire bend becomes unusable.

[0035] Therefore, in order to solve the problems existing in the conveying elbow, the utility model designs a spliced ​​pneumatic conveying pipe elbow. Different areas can choose suitable materials to achieve coordinated cooperation among the areas. When a section of the pipe is partially damaged, it can also be partially replaced, thereby extending the comprehensive service life of the elbow. The specific structure is as follows:

[0036] A spliced ​​pneumatic conveying pipe elbow, such as Figure 1 、 Figure 2 As shown, it includes an inlet flange 1, an inlet straight pipe 2, an inlet transition pipe 3, an impact bend 4, a wear-resistant bend 5, an outlet transition pipe 6, an outlet straight pipe 7 and an outlet flange 8 connected in sequence, and a fastening hoop assembly 9 is provided outside the connection ports of the impact bend 4 and the wear-resistant bend 5.

[0037] The inlet straight pipe 2, the inlet transition pipe 3 and the impact elbow 4 are all made of impact-resistant metal pipes. The inlet flange 1 is also made of metal. The inlet transition pipe 3 and the inlet straight pipe 2 and the impact elbow 4 are all connected by welding.

[0038] The wear-resistant elbow 5, the outlet transition pipe 6, and the outlet straight pipe 7 are made of non-metallic pipes with a certain strength and smoothness. The wear-resistant elbow 5, the outlet transition pipe 6, and the outlet straight pipe 7 are integrally formed by a mold. The outlet flange 8 is also made of non-metallic material.

[0039] The cross sections of the impact bend 4 and the wear-resistant bend 5 are all special-shaped surfaces consisting of a semicircular structure in the upper half and a semi-elliptical structure in the lower half, such as Figure 4 As shown, the radius of the semicircular structure is equal to half of the length of the minor axis of the semi-elliptical structure, and the ratio of the major axis length of the semi-elliptical structure to the radius of the semicircular structure is greater than 1.6.

[0040] The cross sections of the inlet straight pipe 2 and the outlet straight pipe 7 are both circular structures. Figure 3 shown.

[0041] The inlet end face of the inlet transition pipe 3 is a circular structure corresponding to the cross section of the inlet straight pipe 2 , and the outlet end face is a special-shaped surface corresponding to the cross section of the impact elbow 4 .

[0042] The inlet end face of the outlet transition pipe 6 is a special-shaped surface corresponding to the cross section of the wear-resistant elbow 5 , and the outlet end face is a circular structure corresponding to the cross section of the outlet straight pipe 7 .

[0043] The inlet flange 1 is installed at the inlet end of the inlet straight pipe 2, and the outlet end is welded to the circular cross-section of the inlet transition pipe 3.

[0044] The inlet end of the inlet transition pipe 3 is welded to the inlet straight pipe 2, and the outlet end is welded to the special-shaped cross-section of the impact elbow 4, so as to realize a gradual change from a circular cross-section to a special-shaped cross-section.

[0045] The impact bend pipe 4 and the wear-resistant bend pipe 5 are mechanically connected.

[0046] The inner circumference of the connection end face of the impact bend 4 facing the wear-resistant bend 5 is provided with a plurality of inner splicing bosses 41 and the outer circumference is provided with a plurality of outer splicing bosses 42, and the inner splicing bosses 41 and the outer splicing bosses 42 are arranged alternately, as shown in FIG. Figure 5 Wear-resistant elbow 5 facing the impact of the inner circumference of the connecting end surface of the elbow 4 is provided with a plurality of inner splicing grooves 51 and the outer circumference is provided with a plurality of outer splicing grooves 52, the inner splicing grooves 51, the outer splicing grooves 52 are arranged alternately, as shown Figure 5 As shown; the inner splicing boss 41 of the impact bend 4 is clamped in the inner splicing groove 51 of the wear-resistant bend 5, and the outer splicing boss 42 of the impact bend 4 is clamped in the outer splicing groove 52 of the wear-resistant bend 5.

[0047] The height of the inner splicing boss 41 and the outer splicing boss 42 is 1 cm; the depth of the inner splicing groove 51 and the outer splicing groove 52 is 1 cm.

[0048] The inlet end of the outlet transition pipe 6 is connected to the special-shaped cross-section of the wear-resistant elbow 5, and the outlet end is connected to the circular cross-section of the outlet straight pipe 7, completing the gradual change from the special-shaped cross-section to the circular cross-section.

[0049] The inlet end of the outlet straight pipe 7 is connected to the circular cross-section of the outlet transition pipe 6, and the outlet end is installed with an outlet flange 8.

[0050] Fastening hoop assembly 9 as Figure 6 As shown, it includes a fastening sleeve 91 that is sleeved on the outside of the connection ports of the impact bend 4 and the wear-resistant bend 5. The cross-section of the fastening sleeve 91 corresponds to the special-shaped surfaces of the impact bend 4 and the wear-resistant bend 5. The fastening sleeve 91 is an open structure with a fastening seam on the outer wall. Fastening plates 92 are provided on both sides of the fastening seam of the fastening sleeve 91, and the two fastening plates 92 are fixedly connected by bolts.

[0051] A rubber pad is provided between the inner wall of the fastening sleeve 91 and the outer walls of the connection ports of the impact elbow 4 and the wear-resistant elbow 5 .

[0052] The utility model sets the elbow special-shaped cross-section form, when the gas flows through the inlet transition pipe 3, a vortex is formed here, and the vortex can collide with the incoming flow, thereby reducing the speed of the fluid and making the fluid in this part flow slowly. Figure 7 As shown, the impact force of the material on the elbow turning point is reduced, the wear of the inner wall of the elbow is reduced, and the local airflow of the elbow is improved.

[0053] The utility model provides a mechanically spliced ​​segmented elbow, and divides the elbow into an impact elbow 4 and a wear-resistant elbow 5 according to the contact form between the material and the pipe wall. The corresponding pipe wall material can be selected according to the damage form, and the use value of the material is fully utilized. A fastening hoop assembly 9 is provided at the splicing position, which improves the overall connection strength and ensures the air tightness of the elbow. When a section of the pipe is partially damaged, it can also be partially replaced, thereby extending the comprehensive service life of the elbow. The transition from the special-shaped cross-section to the circular cross-section is achieved through the inlet transition pipe 3 and the outlet transition pipe 6, and the inlet flange 1 and the outlet flange 8 are used to connect with other pipelines, thereby ensuring the versatility of the elbow.

[0054] When the utility model is in use, the staff adjusts the center of the inlet straight pipe 2 and the inlet transition pipe 3 with a bracket and aligns the pipes so that the outer walls are flush, and spot welds the circular cross-sections of the inlet straight pipe 2 and the inlet transition pipe 3. The spot welding thickness is consistent with the first layer of welding, but does not exceed 70% of the pipe wall thickness. The weld root must be welded through, and the spot welding positions are uniform and symmetrical, and then full welding is performed; the special-shaped cross-section end of the inlet transition pipe 3 is welded to the special-shaped cross-section end of the impact bend 4. The welding method is the same as above. The inlet straight pipe 2, the inlet transition pipe 3, and the impact bend 4 are all metal pipes. After welding, they form a whole and are placed on the bracket; the one-piece wear-resistant bend 5 and the outlet transition pipe 6 are welded together. , place the outlet straight pipe 7 on the bracket and align it with the welded inlet straight pipe 2, inlet transition pipe 3, and impact elbow 4, insert the inner splicing boss 41 and the outer splicing boss 42 into the corresponding inner splicing groove 51 and the outer splicing groove 52, and wrap a layer of rubber pad on the outside of the connection port, which can not only increase the air tightness of the pipeline, but also reduce the pressure of the fastening hoop assembly 9 on the outer wall of the pipeline; insert the fastening sleeve 91 and place it on the outer layer of the rubber pad, tighten the bolts on the fastening plate 92, so that the fastening sleeve 91 is firmly clamped on the outside of the connection port; finally, translate and hoist the entire elbow part, install the inlet flange 1 and the outlet flange 8 to connect with other pipe sections, and the pipeline elbow connection is completed.

[0055] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A spliced ​​pneumatic conveying pipe elbow, characterized in that: The invention comprises an inlet flange (1), an inlet straight pipe (2), an inlet transition pipe (3), an impact elbow (4), a wear-resistant elbow (5), an outlet transition pipe (6), an outlet straight pipe (7) and an outlet flange (8) which are connected in sequence, and a fastening hoop assembly (9) is provided outside the connection ports of the impact elbow (4) and the wear-resistant elbow (5); The cross-sections of the impact bend (4) and the wear-resistant bend (5) are all special-shaped surfaces consisting of a semicircular structure in the upper half and a semi-elliptical structure in the lower half, the radius of the semicircular structure is equal to half the length of the minor axis of the semi-elliptical structure, and the ratio of the major axis length of the semi-elliptical structure to the radius of the semicircular structure is greater than 1.6; The cross sections of the inlet straight pipe (2) and the outlet straight pipe (7) are both circular structures; The inlet end face of the inlet transition pipe (3) is a circular structure corresponding to the cross section of the inlet straight pipe (2), and the outlet end face is a special-shaped surface corresponding to the cross section of the impact bend pipe (4); The inlet end face of the outlet transition pipe (6) is a special-shaped surface corresponding to the cross section of the wear-resistant curved pipe (5), and the outlet end face is a circular structure corresponding to the cross section of the outlet straight pipe (7).

2. A spliced ​​pneumatic conveying pipe elbow according to claim 1, characterized in that: The inner circumference of the connection end surface of the impact bend (4) facing the wear-resistant bend (5) is provided with a plurality of inner splicing bosses (41) and the outer circumference is provided with a plurality of outer splicing bosses (42), and the inner splicing bosses (41) and the outer splicing bosses (42) are arranged alternately; the inner circumference of the connection end surface of the wear-resistant bend (5) facing the impact bend (4) is provided with a plurality of inner splicing grooves (51) and the outer circumference is provided with a plurality of outer splicing grooves (52), and the inner splicing grooves (51) and the outer splicing grooves (52) are arranged alternately; the inner splicing bosses (41) of the impact bend (4) are clamped in the inner splicing grooves (51) of the wear-resistant bend (5), and the outer splicing bosses (42) of the impact bend (4) are clamped in the outer splicing grooves (52) of the wear-resistant bend (5).

3. A spliced ​​pneumatic conveying pipe elbow according to claim 2, characterized in that: The height of the inner splicing boss (41) and the outer splicing boss (42) is 1 cm; the depth of the inner splicing groove (51) and the outer splicing groove (52) is 1 cm.

4. The spliced ​​pneumatic conveying pipe elbow according to claim 1, characterized in that: The fastening hoop assembly (9) comprises a fastening sleeve (91) which is sleeved on the outside of the connection port of the impact bend (4) and the wear-resistant bend (5); the cross section of the fastening sleeve (91) corresponds to the special-shaped surface of the impact bend (4) and the wear-resistant bend (5); the fastening sleeve (91) is an open structure with a fastening seam provided on the outer wall; fastening plates (92) are provided on both sides of the fastening seam of the fastening sleeve (91); and the two fastening plates (92) are fixedly connected by bolts.

5. The spliced ​​pneumatic conveying pipe elbow according to claim 4, characterized in that: A rubber pad is provided between the inner wall of the fastening sleeve (91) and the outer walls of the connection ports of the impact bend (4) and the wear-resistant bend (5).

6. The spliced ​​pneumatic conveying pipe elbow according to claim 1, characterized in that: The inlet transition pipe (3) is connected to the inlet straight pipe (2) and the impact elbow (4) by welding.

7. The spliced ​​pneumatic conveying pipe elbow according to claim 6, characterized in that: The wear-resistant curved pipe (5), the outlet transition pipe (6) and the outlet straight pipe (7) are an integrally formed structure.

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