Pneumatic conveying rotary switching valve

Abstract

The utility model relates to the technical field of pneumatic conveying discloses a kind of pneumatic conveying rotary switching valve, including input pipeline, pull distribution mechanism, transition mechanism, shell frame, four mutual combination uses play role, inflatable rubber ring continues to extrude the end side wall position of transition pipeline, main butt joint pipe, auxiliary sealing pipe three in material transmission process, eliminate sanitary dead angle, solve the problem of material residue;Through the form of transition pipeline, main butt joint pipe, auxiliary sealing pipe three respective intercommunication sleeve replacement existing plane seal, get rid of the sealing ring to be carried by plane seal, and sleeve is sealed using inflatable rubber ring after, avoid the wear and tear of structural member to produce gap to cause the infiltration of material, solve the problem that possibly produce stationary residue;Pull distribution mechanism can realize the switching work of material output by pulling rotary transition mechanism, complete batch control in conveying process, avoid cross contamination between batches or between varieties of material.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic conveying, specifically a pneumatic conveying rotary switching valve. Background Technology

[0002] In the existing field of pneumatic conveying, there are scenarios where materials need to be conveyed from one sending point to multiple receiving points through negative or positive pressure. For example, powder is fed into one feeding station, and there may be two, three, four, etc. receiving points, and these points receive materials according to a certain batch logic.

[0003] The requirements are even stricter in the food and pharmaceutical sectors, especially for raw materials, which are subject to hygiene and safety requirements and batch control during transportation to prevent cross-contamination between batches or varieties of materials.

[0004] Therefore, when one sending point corresponds to multiple receiving points, pipeline switching is required. After the first receiving point finishes receiving a batch of materials, the pipeline is switched, and the pipelines of the second receiving point and the sending point are connected through a switching valve.

[0005] Currently, there are three existing switching methods based on their implementation effects, but each of these three methods has its own advantages and disadvantages:

[0006] The first method involves installing two or more butterfly valves, ball valves, or gate valves on a tee or multi-way structure. Pipeline switching is achieved through the opening and closing logic of the valves. The advantages and disadvantages are: installing ball valves, butterfly valves, or gate valves at positions A, B, C, and D, and then using a matching tee to achieve one-to-two or one-to-many transport, offers advantages in terms of low implementation cost and simple structure. However, for one-to-three or more transport, a large installation space is required. Due to pneumatic effects and driving airflow issues, material residue often easily appears at positions E, F, G, and H when the valves are closed. If used in the food and pharmaceutical industries, this can lead to flow residue and cross-contamination. Furthermore, due to the inherent characteristics of butterfly valves, ball valves, or gate valves, a sanitary dead zone exists at position I. Therefore, the first method is unsuitable for applications with high cleanliness requirements. Figure 7 As shown;

[0007] The second method involves switching via an integrated directional valve such as a ball valve or a flat gate valve. This method uses a standard ball valve core or gate valve to form a three-way directional valve, such as... Figure 8 As shown, the principle of this structure is to add a three-way valve core into a pre-formed housing, and to switch directions by rotating the valve core. Actual analysis and use show that... Figures 9-11Material residue can occur at positions J, K, and L. Furthermore, because the valve itself needs to rotate, there is a certain clearance between the valve body and the valve body. Over time, this clearance will wear and increase, leading to material accumulation between the valve body and the valve core, ultimately causing cross-contamination. This is unavoidable with this design.

[0008] The third type: switching is achieved by using a flap valve, which switches materials through the switching of plates. The problem with this structure is that it is generally large in size, and due to structural limitations, the sealing is poor. In addition, due to structural problems, it cannot achieve one-to-many switching. Utility Model Content

[0009] To address the shortcomings of existing technologies, this invention provides a pneumatic conveying rotary switching valve to solve the aforementioned problems.

[0010] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0011] A pneumatic conveying rotary switching valve includes an input pipe, a pull-distribution mechanism, a transition mechanism, and a housing frame. One end of the transition mechanism is fitted inside the input pipe, and the other end is connected to the pull-distribution mechanism.

[0012] The transition mechanism includes a transition pipe, a transition gear, a transition rack, a transition slide bar, a transition cylinder, and a docking mechanism. The transition gear is sleeved on the transition pipe. The transition rack is located on one side of the input pipe and is slidably connected to the transition slide bar. The transition rack and the transition gear mesh with each other. The transition cylinder is connected to the transition rack.

[0013] The pulling and distributing mechanism includes a distribution pipe, a pulling cylinder, and a pulling crossbar. The distribution pipe is distributed on the outer frame. The pulling cylinder is connected to the pulling crossbar, and the pulling crossbar is connected to the docking mechanism. During material transmission, the inflatable rubber ring continuously squeezes the end sidewalls of the transition pipe, the main docking pipe, and the auxiliary sealing pipe, eliminating sanitary dead corners and solving the problem of material residue. The existing flat seal is replaced by the form in which the transition pipe, the main docking pipe, and the auxiliary sealing pipe are connected and nested, eliminating the sealing ring required by the flat seal. After nesting, the inflatable rubber ring seal is used to prevent material seepage due to gaps caused by wear of structural components, thus solving the problem of potential static residue. The pulling and distributing mechanism can switch the material output port by pulling the rotating transition mechanism, completing batch control during the conveying process and avoiding cross-contamination between batches or varieties of materials.

[0014] Preferably, the docking mechanism includes a docking plate, a docking bearing seat, a docking shaft, a main docking pipe, and an auxiliary sealing pipe. The main docking pipe is fixed on the docking plate and one end is connected to a transition pipe. The auxiliary sealing pipe is fixed on the docking plate. One end of the docking shaft is connected to the docking bearing seat, and the other end is connected to a pull crossbar. The docking bearing seat is fixed on the docking plate.

[0015] Preferably, an auxiliary sealing plate is provided at the opening of the auxiliary sealing tube.

[0016] Preferably, the distribution pipe includes a distribution pipe gas inlet and a distribution pipe sealing groove. The distribution pipe gas inlet is disposed on the distribution pipe and communicates with the distribution pipe sealing groove disposed inside the distribution pipe.

[0017] Preferably, the input pipeline includes an input pipeline gas outlet and an input pipeline sealing groove. The gas outlet is located on the input pipeline and communicates with the input pipeline sealing groove located inside the input pipeline.

[0018] Preferably, both the distribution pipe sealing groove and the input pipe sealing groove are provided with inflatable rubber rings, and the inflation nozzles of the inflatable rubber rings extend from the corresponding air outlets of the distribution pipe and the input pipe respectively.

[0019] Preferably, the transition pipe is a bend.

[0020] Compared to existing technologies, this utility model discloses a pneumatic conveying rotary switching valve, including an input pipe, a pull-distribution mechanism, a transition mechanism, and a housing frame. These four components work together to perform their functions.

[0021] During material transfer, the inflatable rubber ring continuously squeezes the end sidewalls of the transition pipe, main connecting pipe, and auxiliary sealing pipe, eliminating sanitary dead corners and solving the problem of material residue.

[0022] The existing flat seal is replaced by a system in which the transition pipe, main connecting pipe, and auxiliary sealing pipe are connected and fitted together. This eliminates the need for the sealing rings that the flat seal requires. Furthermore, the use of an inflatable rubber ring for sealing after the system is fitted together avoids the seepage of materials due to gaps caused by wear of structural components, thus solving the problem of potential static residue.

[0023] The pull distribution mechanism can switch the material output port by pulling the rotary transition mechanism, thus completing batch control during the conveying process and avoiding cross-contamination between material batches or varieties. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the pneumatic conveying rotary switching valve of this utility model;

[0025] Figure 2This is a schematic diagram of the internal structure of the pneumatic conveying rotary switching valve of this utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of the pneumatic conveying rotary switching valve of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the pull distribution mechanism of this utility model;

[0028] Figure 5 This is an enlarged cross-sectional view of the distribution pipe structure of this utility model;

[0029] Figure 6 This is an enlarged cross-sectional view of the input pipe structure of this utility model;

[0030] Figure 7 This is a reference diagram in the background art of this utility model;

[0031] Figure 8 This is a reference diagram in the background art of this utility model;

[0032] Figure 9 This is a reference diagram in the background art of this utility model;

[0033] Figure 10 This is a reference diagram in the background art of this utility model;

[0034] Figure 11 This is a reference diagram in the background art of this utility model. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0036] Example 1

[0037] A pneumatic conveying rotary switching valve includes an input pipe 1, a pull-distribution mechanism 2, a transition mechanism 3, and a housing frame. One end of the transition mechanism 3 is sleeved inside the input pipe 1, and the other end is connected to the pull-distribution mechanism 2.

[0038] The transition mechanism 3 includes a transition pipe 31, a transition gear 32, a transition rack 33, a transition slide bar 34, a transition cylinder 35, and a docking mechanism 36. The transition gear 32 is sleeved on the transition pipe 31. The transition rack 33 is located on one side of the input pipe 1 and is slidably connected to the transition slide bar 34. The transition rack 33 and the transition gear 32 mesh with each other. The transition cylinder 35 is connected to the transition rack 33.

[0039] The pulling and distributing mechanism 2 includes a distributing pipe 21, a pulling cylinder 22, and a pulling crossbar 23. The distributing pipe 21 is distributed on the outer frame. The pulling cylinder 22 is connected to the pulling crossbar 23. The pulling crossbar 23 is connected to the docking mechanism 36. The docking mechanism 36 includes a docking plate 361, a docking bearing seat 362, a docking shaft 363, a main docking pipe 364, and an auxiliary sealing pipe 365. The main docking pipe 364 is fixed on the docking plate 361 and one end is connected to the transition pipe 31. The auxiliary sealing pipe 365 is fixed on the docking plate 361. The docking shaft 362... 3 One end is connected to the docking bearing seat 362, and the other end is connected to the pull crossbar 23. The docking bearing seat 362 is fixed on the docking plate 361. The auxiliary sealing plate 3651 is provided at the opening of the auxiliary sealing pipe 365. The function of the auxiliary sealing plate 3651 is to prevent foreign objects from entering the distribution pipe 21 on the un-docked side due to long-term exposure. The transition slide bar 34 and the transition cylinder 35 are both connected to the outer shell frame. The form of the outer shell frame can be adapted to the three-way configuration of the input pipe 1, the pull distribution mechanism 2, and the transition mechanism 3. It is not particularly emphasized here, as long as it can support the movement of each component.

[0040] The distribution pipe 21 includes a distribution pipe air inlet 211 and a distribution pipe sealing groove 212. The distribution pipe air inlet 211 is disposed on the distribution pipe 21 and communicates with the distribution pipe sealing groove 212 disposed inside the distribution pipe 21. In this embodiment, there are two distribution pipes 21, in a one-to-two configuration, and the two are arranged at 180°. The input pipe 1 includes an input pipe air inlet 11 and an input pipe sealing groove 12. The input pipe air inlet 11 is disposed on the input pipe 1 and communicates with the input pipe sealing groove 12 disposed inside the input pipe 1. Both the distribution pipe sealing groove 212 and the input pipe sealing groove 12 are provided with inflatable rubber rings, and the inflation nozzles of the inflatable rubber rings are respectively provided from the corresponding distribution pipe air inlet 211 and the input pipe sealing groove 12. The air inlet 11 of the input pipe extends out. During material transfer, the inflatable rubber ring is located at the end side wall of the main connecting pipe 364, the auxiliary sealing pipe 365, and the transition pipe 31. When the main connecting pipe 364, the auxiliary sealing pipe 365, and the transition pipe 31 are connected to the corresponding input pipe 1 and distribution pipe 21, a structural gap is left at the diameter end to avoid wear. The sealing work is performed by the inflatable rubber ring. The transition pipe 31 is a bend. Experiments have shown that the inflatable rubber ring has the best sealing effect, and the inflation and deflation method is more suitable for the inlet and outlet sealing state of this scheme. An air pump or other device that can cooperate in inflation and deflation can be set on the inflation nozzle side of the inflatable rubber ring. There are many similar devices in the prior art, so this part will not be elaborated on.

[0041] Working mode: When conveying materials, the materials enter the transition pipe 31 from the input pipe 1, and are then transferred to one of the distribution pipes 21 through the transition pipe 31 and enter the subsequent process. During this period, the inflatable rubber ring in the sealing groove 12 of the input pipe continuously squeezes the end side wall of the transition pipe 31 to form a relatively sealed connection environment. The inflatable rubber ring in the sealing groove 212 of the distribution pipe on the other side also continuously squeezes the end side walls of the main connecting pipe 364 and the auxiliary sealing pipe 365 to form a relatively sealed connection environment.

[0042] When the material needs to switch the output port, the inflatable rubber rings inside the distribution pipe sealing groove 212 and the input pipe sealing groove 12 are deflated through the inflation nozzle, pulling the cylinder 22 to retract, pulling the crossbar 23 to move the docking shaft 363, and the docking plate 361 connected to the docking shaft 363 moves, and together with the main docking pipe 364 and the auxiliary sealing pipe 365 on the docking plate 361, they move out of the distribution pipe 21. Then, the transition cylinder 35 drives the transition rack 33 to move horizontally, which can control the transition gear 32 on the transition pipe 31 to mesh and rotate, and the transition pipe 3 1. Rotating 180° around the docking shaft 363 on the docking bearing seat 362 as the center completes the alignment work before switching the output material pipeline. Then, pulling the cylinder 22 drives the crossbar to extend, and the main docking pipe 364 completes the switching work. Then, the inflatable rubber ring in the input pipeline sealing groove 12 continuously squeezes the end side wall of the transition pipe 31 to form a relatively sealed connection environment. The inflatable rubber ring in the other side distribution pipe sealing groove 212 also continuously squeezes the end side walls of the main docking pipe 364 and the auxiliary sealing pipe 365 to form a relatively sealed connection environment.

[0043] Example 2

[0044] Without changing the above technical features, the distribution pipe 21 can be two or more. Only the appropriate number of auxiliary sealing pipes 365 need to be added as needed. The rotation angle can be changed as needed. For example, when there is one to three pipes, the main connecting pipe 364 can be rotated 90°.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic conveying rotary switching valve, characterized in that: The system includes an input pipe (1), a pull-distribution mechanism (2), a transition mechanism (3), and an outer frame. One end of the transition mechanism (3) is fitted inside the input pipe (1), and the other end is connected to the pull-distribution mechanism (2). The transition mechanism (3) includes a transition pipe (31), a transition gear (32), a transition rack (33), a transition slide bar (34), a transition cylinder (35), and a docking mechanism (36). The transition gear (32) is sleeved on the transition pipe (31). The transition rack (33) is located on one side of the input pipe (1) and is slidably connected to the transition slide bar (34). The transition rack (33) meshes with the transition gear (32). The transition cylinder (35) is connected to the transition rack (33). The pulling and distributing mechanism (2) includes a distributing pipe (21), a pulling cylinder (22), and a pulling crossbar (23). The distributing pipe (21) is distributed on the outer shell frame. The pulling cylinder (22) is connected to the pulling crossbar (23), and the pulling crossbar (23) is connected to the docking mechanism (36).

2. The pneumatic conveying rotary switching valve according to claim 1, characterized in that: The docking mechanism (36) includes a docking plate (361), a docking bearing seat (362), a docking shaft (363), a main docking pipe (364), and an auxiliary sealing pipe (365). The main docking pipe (364) is fixed on the docking plate (361) and one end is connected to the transition pipe (31). The auxiliary sealing pipe (365) is fixed on the docking plate (361). One end of the docking shaft (363) is connected to the docking bearing seat (362), and the other end is connected to the pull crossbar (23). The docking bearing seat (362) is fixed on the docking plate (361).

3. The pneumatic conveying rotary switching valve according to claim 1, characterized in that: An auxiliary sealing plate (3651) is provided at the opening of the auxiliary sealing tube (365).

4. The pneumatic conveying rotary switching valve according to claim 1, characterized in that: The distribution pipe (21) includes a distribution pipe gas inlet (211) and a distribution pipe sealing groove (212). The distribution pipe gas inlet (211) is provided on the distribution pipe (21) and communicates with the distribution pipe sealing groove (212) provided inside the distribution pipe (21).

5. The pneumatic conveying rotary switching valve according to claim 4, characterized in that: The input pipe (1) includes an input pipe air outlet (11) and an input pipe sealing groove (12). The input pipe air outlet (11) is located on the input pipe (1) and communicates with the input pipe sealing groove (12) located inside the input pipe (1).

6. The pneumatic conveying rotary switching valve according to claim 5, characterized in that: Both the distribution pipe sealing groove (212) and the input pipe sealing groove (12) are equipped with inflatable rubber rings, and the inflation nozzles of the inflatable rubber rings extend from the corresponding distribution pipe air outlet (211) and input pipe air outlet (11), respectively.

7. The pneumatic conveying rotary switching valve according to claim 6, characterized in that: The transition pipe (31) is a bend.

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