Pipe pressurization device and powder delivery system

Abstract

The utility model discloses a kind of pipeline pressurizing device and powder conveying system.Pipeline pressurizing device includes pipeline pressurizing main body, check valve and trachea.Pipeline pressurizing main body includes connecting sleeve and air supply shell.Air supply shell is sealingly sleeved on the outside of connecting sleeve, and is enclosed with connecting sleeve to form air supply cavity.Air supply shell is provided with air inlet communicated with air supply cavity, connecting sleeve is provided with multiple air supply ports, multiple air supply ports are communicated with air supply cavity and powder conveying pipeline.Check valve is installed at air inlet, and is used to guide gas into air inlet.One end of trachea is connected with check valve, and the other end of trachea is used to be connected with external gas source.Adopting the pipeline pressurizing device provided by the utility model improves the uniformity of gas flow distribution, avoids the problem that material conveying is uneven or blocked due to pressure mutation, and check valve can ensure the one-way flow of air supply of powder conveying pipeline, prevent powder backflow and air supply backflow.

Description

Technical Field

[0001] This utility model relates to the technical field of material conveying, and in particular to a pipeline pressurization device and a powder conveying system. Background Technology

[0002] During the powder conveying process, if the airflow within the powder conveying pipeline is unstable or the pressure is insufficient, the powder is prone to sedimentation, reducing conveying efficiency and stability, affecting the continuity of lithium battery production, and causing uneven powder distribution in processes such as slurry preparation and coating, thus affecting product quality. Existing pipeline pressurization devices have unreasonable air replenishment point designs, complex structures, and high costs. Utility Model Content

[0003] In view of this, one objective of this utility model is to provide a pipeline pressurization device and a powder conveying system to solve the technical problems of unreasonable air replenishment point design, complex structure, and high cost of existing pipeline pressurization devices.

[0004] In a first aspect, this utility model provides a pipeline pressurization device, including a pipeline pressurization body, a one-way valve, and a gas pipe. The pipeline pressurization body includes a connecting sleeve and a gas replenishment shell. The gas replenishment shell is sealed and fitted onto the outside of the connecting sleeve, forming a gas replenishment chamber with the connecting sleeve. The gas replenishment shell is provided with an air inlet communicating with the gas replenishment chamber, and the connecting sleeve is provided with multiple gas replenishment ports, which communicate with the gas replenishment chamber and the powder conveying pipeline. The one-way valve is installed at the air inlet and is used to introduce gas into the air inlet. One end of the gas pipe is connected to the one-way valve, and the other end of the gas pipe is connected to an external gas source.

[0005] In conjunction with the first aspect, in one possible implementation, the projection of the plurality of air inlets in the axial direction perpendicular to the connecting sleeve covers the perimeter of the cross-section of the connecting sleeve.

[0006] In conjunction with the first aspect, in one possible implementation, the plurality of the air inlets are arranged in a spiral, matrix, ring, or straight line configuration.

[0007] In conjunction with the first aspect, in one possible implementation, the extending direction of the air inlet forms an angle with the radial direction of the connecting sleeve, with the opening facing the powder conveying direction, the angle being 30°-60°.

[0008] In conjunction with the first aspect, in one possible implementation, the pipeline pressurization device further includes a nozzle disposed within the air inlet, the nozzle's injection direction forming an angle with the radial direction of the connecting sleeve.

[0009] In conjunction with the first aspect, in one possible implementation, each of the air inlets includes a first air inlet and a second air inlet connected in sequence. The connecting sleeve includes a support tube and a bushing tube. The support tube is sealed to the air inlet housing and is sleeved on the outside of the bushing tube. The support tube is provided with the first air inlet, and the bushing tube is provided with the second air inlet. The extending direction of the first air inlet is parallel to the radial direction of the connecting sleeve, and the extending direction of the second air inlet forms an angle with the radial direction of the connecting sleeve.

[0010] In conjunction with the first aspect, in one possible implementation, the air inlet is located at the middle of the outer side wall of the air pipe in the radial direction of the connecting sleeve, and the extension direction of the air inlet is parallel to the radial direction of the connecting sleeve.

[0011] In conjunction with the first aspect, in one possible implementation, the connecting sleeve includes a support pipe and a bushing pipe. The support pipe is sealed to the air supply housing and is sleeved on the outside of the bushing pipe. The support pipe is configured as a rigid pipe, and the bushing pipe is configured as a non-metallic pipe. The bushing pipe is used to communicate with the powder conveying pipeline. The radial dimension of the bushing pipe in the connecting sleeve is equal to the radial dimension of the powder conveying pipeline in the connecting sleeve.

[0012] In conjunction with the first aspect, in one possible implementation, the pipeline pressurization device further includes a control valve detachably mounted to the check valve, the control valve being configured as a manual valve or an electric valve.

[0013] Secondly, this utility model provides a powder conveying system, including a powder conveying pipeline and a pipeline pressurization device as described above, wherein the pipeline pressurization device is installed on the powder conveying pipeline.

[0014] The pipeline pressurization device and powder conveying system provided by this utility model, on the one hand, are based on the connection of the connecting sleeve and the air replenishment shell to form an air replenishment chamber, so that the gas supplied by the external air source passes through the air replenishment chamber and then is guided into the powder conveying pipeline through the air replenishment port. Thus, the air replenishment chamber can act as a buffer space to balance the pressure fluctuations of the external air source, improve the uniformity of gas flow distribution, and make the airflow entering the powder conveying pipeline more stable, avoiding the problem of uneven material conveying or blockage caused by sudden pressure changes, thereby improving the conveying efficiency, conveying stability and conveying continuity of powder. On the other hand, based on the one-way valve set at the air inlet, the air replenishment in the powder conveying pipeline is ensured to flow in one direction, preventing powder backflow and air replenishment backflow, ensuring the air replenishment effect, and avoiding the increase in structural complexity, assembly difficulty and maintenance cost caused by setting a one-way valve at the air replenishment port. Moreover, the one-way valve is located at the air inlet at the low-pressure end, which has less airflow resistance and lower energy consumption. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the pipeline pressurization device provided in an embodiment of this utility model.

[0017] Figure 2 yes Figure 1 A cross-sectional view of the first embodiment of the pipeline pressurization device.

[0018] Figure 3 yes Figure 2 An enlarged view of section I of the pipeline pressurization device.

[0019] Figure 4 This is a schematic diagram of the powder conveying system provided in an embodiment of the present invention.

[0020] Figure 5 yes Figure 1 A cross-sectional view of the second embodiment of the pipeline pressurization device.

[0021] Explanation of main reference numerals: Powder conveying system - 1000; Pipeline pressurizing device - 100; Pipeline pressurizing body - 10; Air replenishment chamber - 101; Connecting sleeve - 11; Air replenishment port - 1101; First air replenishment hole - 1102; Second air replenishment hole - 1103; Support pipe - 111; Bushing pipe - 112; Adhesive layer - 113; First flange seat - 115; Adhesive layer - 116; Air replenishment shell - 12; Air inlet - 1201; Nozzle - 13; One-way valve - 20; Air pipe - 30; Control valve - 40; Powder conveying pipeline - 200; Second flange seat - 210; Included angle - α; Central axis - P; Axial direction - X; Radial direction - Y; Circumferential direction - Z; Conveying direction - F.

[0022] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] It is understood that the terminology in the specification, claims, and accompanying drawings of this utility model is for describing specific embodiments only and is not intended to limit the utility model. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Unless the context clearly states otherwise, the singular forms "a" and "described" are also intended to include the plural forms. The term "comprising," and any variations thereof, are intended to cover non-exclusive inclusion. Furthermore, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of this utility model, wherein terms indicating direction such as up, down, left, and right refer only to the position of the illustrated structure in the corresponding drawings. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following description describes preferred embodiments of the present invention; however, the foregoing description is intended to illustrate the general principles of the present invention and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

[0026] Please refer to the following: Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the pipeline pressurization device 100 provided in this embodiment of the utility model; Figure 2 yes Figure 1 A cross-sectional view of a first embodiment of the pipeline pressurization device 100. The pipeline pressurization device 100 includes a pipeline pressurization body 10, a one-way valve 20, and an air pipe 30. The pipeline pressurization body 10 includes a connecting sleeve 11 and an air replenishment shell 12. The air replenishment shell 12 is sealed and fitted onto the outside of the connecting sleeve 11, forming an air replenishment chamber 101. The air replenishment shell 12 is provided with an air inlet 1201 communicating with the air replenishment chamber 101. The connecting sleeve 11 is provided with multiple air replenishment ports 1101, which communicate with the air replenishment chamber 101 and the powder conveying pipeline 200. The one-way valve 20 is installed at the air inlet 1201 and is used to introduce gas into the air inlet 1201. One end of the air pipe 30 is connected to the one-way valve 20, and the other end of the air pipe 30 is used to connect to an external air source.

[0027] The pipeline pressurization device 100 provided by this utility model has two advantages. First, it is based on the connection of the connecting sleeve 11 and the gas replenishment shell 12 to form a gas replenishment chamber 101. This allows the gas supplied by the external gas source to pass through the gas replenishment chamber 101 and then be guided into the powder conveying pipeline through the gas replenishment port 1101. Thus, the gas replenishment chamber 101 can serve as a buffer space to balance the pressure fluctuations of the external gas source, improve the uniformity of gas flow distribution, and make the airflow entering the powder conveying pipeline 200 more stable. This avoids the problem of uneven material conveying or blockage caused by sudden pressure changes, thereby improving the conveying efficiency, conveying stability, and conveying continuity of the powder. Second, it is based on the one-way valve 20 provided at the air inlet 1201 to ensure unidirectional flow of replenished gas in the powder conveying pipeline 200, prevent powder backflow and replenished gas backflow, ensure the replenishment effect, and avoid increasing the structural complexity, assembly difficulty, and maintenance cost of setting the one-way valve 20 at the gas replenishment port 1101. Furthermore, the one-way valve 20 is located at the air inlet 1201 at the low-pressure end, which has less airflow resistance and lower energy consumption.

[0028] For the sake of accuracy, all references to direction in this article should be expressed in terms of direction. Figure 2 For reference, the connecting sleeve 11 has a central axis P. The term "axial direction X" refers to the direction parallel to the central axis P of the connecting sleeve 11, where the X-axis is the left-right direction (with the positive X-axis being right). The term "radial direction Y" refers to the direction perpendicular to the central axis P of the connecting sleeve 11, i.e., along the radius of the cross-section of the connecting sleeve 11, where the Y-axis is the up-down direction (with the positive Y-axis being up). The term "circumferential direction Z" refers to the circumferential direction of the connecting sleeve 11, i.e., the direction surrounding the central axis P of the connecting sleeve 11. The axial direction X, radial direction Y, and circumferential direction Z together constitute the three orthogonal directions of the connecting sleeve 11. For ease of description, the up-down, left-right, and front-back orientations in this utility model are relative positions and do not constitute a limitation. The axial direction X, radial direction Y, and circumferential direction Z of the connecting sleeve 11 can be customized according to the specific structure of the product and the perspective presented in the accompanying drawings; this utility model does not impose specific limitations. The powder conveying direction F is parallel to the axial direction X of the connecting sleeve 11.

[0029] The pipeline pressurization device 100 is used to regulate the pressure of the powder conveying pipeline 200. The material can be battery material. Battery material includes various materials, such as, but not limited to, positive electrode materials, negative electrode materials, conductive agents, etc. In this embodiment, battery material is used as an example; it is understood that the material can also be other materials, such as food materials, pharmaceutical materials, fertilizer materials, building materials, etc., and the category of the material is not limited here. The refrigerant can be, but is not limited to, at least one of water, gas, oil, etc.

[0030] It should be noted that, Figure 1The purpose of this diagram is merely to schematically illustrate the arrangement of the pipeline pressurization body 10, the one-way valve 20, and the air pipe 30, and is not intended to specifically limit the connection positions, connection relationships, or specific structures of the various components. The diagram is only a schematic representation of the structure of the pipeline pressurization device 100 according to an embodiment of this utility model and does not constitute a specific limitation on the pipeline pressurization device 100. In other embodiments of this utility model, the pipeline pressurization device 100 may include more or fewer components than shown in the diagram, or a combination of certain components, or different components. For example, the pipeline pressurization device 100 may also include, but is not limited to, pressure detectors, flow detectors, etc. Specifically, the pressure detector is used to detect the pressure of the airflow provided by the external air source. The flow detector is used to detect the flow rate parameters of the airflow provided by the external air source.

[0031] The projections of multiple air inlets 1101 in the axial direction X, perpendicular to the connecting sleeve 11, cover the perimeter of the cross-section of the connecting sleeve 11. Thus, the circumferential coverage of the air inlets 1101 across the cross-section of the connecting sleeve 11 ensures uniform gas injection along the entire cross-section of the connecting sleeve 11, preventing airflow concentration on one side from causing excessively high local velocities or eddies, improving air supply uniformity, enhancing the airflow's ability to carry powder, reducing sedimentation during separation, and improving material conveying efficiency and stability. Furthermore, uniform circumferential air supply weakens axial airflow pulsation, preventing agglomeration or breakage of separated particles due to sudden velocity changes, thus improving the quality of material conveying.

[0032] For example, in this embodiment, multiple air inlets 1101 are arranged in a ring around the central axis P of the connecting sleeve 11, which facilitates the processing and shaping of the air inlets 1101. Furthermore, uniform circumferential air supply weakens the pulsation of axial airflow, preventing the agglomeration or breakage of separated particles due to sudden velocity changes, and improving the quality of material conveying. In other words, multiple air inlets 1101 are arranged at intervals along the circumferential direction Z of the material connecting sleeve 11. Specifically, multiple air inlets 1101 are arranged at equal intervals along the circumferential direction Z of the connecting sleeve 11.

[0033] In some embodiments, the multiple air inlets 1101 are arranged in a spiral pattern; alternatively, the multiple air inlets 1101 can be arranged in a matrix pattern; or alternatively, the multiple air inlets 1101 can be arranged in a straight line. Thus, a suitable layout is selected according to the pipe shape and conveying requirements to ensure uniform air supply. It should be noted that a spiral arrangement means that the lines connecting the multiple air inlets 1101 are arranged spirally around the central axis P of the connecting sleeve 11. A matrix arrangement means that the multiple air inlets 1101 are arranged in multiple rows and columns on the outer wall of the connecting sleeve 11. A straight line arrangement means that the lines connecting the multiple air inlets 1101 are straight, for example, a straight line arrangement means that the lines connecting the multiple air inlets 1101 are parallel to the central axis P of the connecting sleeve 11. The arrangement of the air inlets 1101 can be determined according to the type of powder, the flow area of ​​the powder conveying pipe, etc., and this embodiment of the invention does not impose specific limitations. For example, multiple air inlets 1101 can be arranged in a regular or irregular pattern.

[0034] Please refer to the following: Figure 2 and Figure 3 , Figure 3 yes Figure 2 An enlarged view of part I of the pipeline pressurization device 100. In some embodiments, the extension direction of the air inlet 1101 forms an angle α with the radial direction Y of the connecting sleeve 11, with the opening facing the powder conveying direction F. The angle α is 30°-60°. Understandably, when the angle α is too small, the injected airflow will impact the powder conveying direction F in the opposite or perpendicular direction, thereby disrupting the stability of the original flow field in the pipeline, causing eddies or local high-pressure areas, and increasing the risk of pipeline vibration and wear; when the angle α is too large, the injected gas cannot fully penetrate into the powder flow, resulting in poor mixing and easy powder settling. This invention sets an appropriate angle α, so that the components of the airflow are superimposed along the conveying direction F, assisting in pushing the powder, and can use the radial perpendicular component of the airflow to disperse the agglomerated powder, improve suspension uniformity, avoid eddies, and improve the stability of pressure distribution. For example, the included angle α can be, but is not limited to, 30°, 35°, 40°, 45°, 50°, 55°, or 60°. It should be noted that the size of the included angle α can be set according to the type of powder, the flow area of ​​the powder conveying pipe, etc., and this embodiment of the utility model does not impose specific limitations.

[0035] Exemplarily, in this embodiment, each air inlet 1101 includes a first air inlet hole 1102 and a second air inlet hole 1103 connected in sequence. The connecting sleeve 11 includes a support tube 111 and a bushing tube 112. The support tube 111 is sealed to the air inlet housing 12 and is sleeved on the outside of the bushing tube 112. The support tube 111 is provided with the first air inlet hole 1102. The bushing tube 112 is provided with the second air inlet hole 1103. The extending direction of the first air inlet hole 1102 is parallel to the radial direction Y of the connecting sleeve 11. The extending direction of the second air inlet hole 1103 forms an angle α with the radial direction Y of the connecting sleeve 11. Therefore, based on the fact that the extension direction of the first air replenishment hole 1102 is parallel to the extension direction of the air inlet 1201, and the extension direction of the second air replenishment hole 1103 is inclined towards the material conveying direction F in the powder conveying pipeline 200, on the one hand, the first air replenishment hole 1102 can stabilize the pressure of the air replenishment chamber 101, avoid energy loss caused by sudden airflow turning, and provide pre-compressed airflow for the second air replenishment hole 1103, reducing pressure fluctuations in the powder conveying pipeline 200 and improving the uniformity and stability of the powder conveying speed; on the other hand, the cooperative effect of the first air replenishment hole 1102 and the second air replenishment hole 1103 avoids the problem of turbulence or backflow caused by the air replenishment hole 1101 directly spraying air towards the powder conveying pipeline 200 at an incline. The first air replenishment hole 1102 is provided on the side wall of the air replenishment housing 12 in the radial direction X of the connecting sleeve 11. Specifically, the first air replenishment hole 1102 is provided in the middle of the side wall of the air replenishment housing 12 in the radial direction X of the connecting sleeve 11.

[0036] In this embodiment, the connecting sleeve 11 further includes an adhesive layer 113. The support tube 111 and the bushing tube 112 are fixedly connected by the adhesive layer 113. Of course, in some embodiments, the adhesive layer 113 may be omitted from the connecting sleeve 11, that is, the support tube 111 and the bushing tube 112 may be fixedly connected by screwing, interference fit or other means. This embodiment of the present invention does not make specific limitations.

[0037] Please refer to the following: Figure 2 and Figure 4 , Figure 4 This is a schematic diagram of the structure of the powder conveying system 1000 provided in an embodiment of the present invention. In some embodiments, the connecting sleeve 11 further includes a first flange seat 115. The first flange seat 115 is sealed and fixedly connected to the support pipe 111 at both ends of the connecting sleeve 11. A second flange seat 210 is provided at the end of the powder conveying pipeline 200 near the pipeline pressurization device 100. The first flange seat 115 and the second flange seat 210 are sealed and fixedly connected, thereby enabling the pipeline pressurization device 100 to be installed on the powder conveying pipeline 200.

[0038] In some embodiments, the connecting sleeve 11 further includes an adhesive layer 116. The adhesive layer 116 is disposed at the connection between the support pipe 111 and the first flange seat 115 and the air replenishment housing 12, thereby improving the sealing performance of the connection between the pipeline pressurization device 100 and the powder conveying pipeline 200, and improving the air replenishment effect and material conveying effect.

[0039] Please refer to the following: Figure 2 and Figure 5 , Figure 5 yes Figure 1 A cross-sectional view of a second embodiment of the pipeline pressurization device 100. In some embodiments, the pipeline pressurization device 100 further includes a nozzle 13. The nozzle 13 is disposed within the air supply port 1101, and the spray direction of the nozzle 13 forms an angle α with the radial direction Y of the connecting sleeve 11. Thus, on the one hand, the nozzle 13 accelerates the air supply flow through its contraction and expansion structure, increasing the flow velocity of the airflow entering the powder conveying pipeline 200, thereby enabling the high-speed airflow to penetrate the powder layer more effectively, preventing local accumulation or blockage, and improving the uniformity of gas-material mixing; on the other hand, the nozzle 13 can more precisely control the airflow direction, avoiding conflict between the airflow and the conveying direction F, reducing energy loss, and assisting in pushing the powder.

[0040] Please refer to it again. Figure 2 The air inlet 1201 is located in the middle of the outer wall of the air pipe 30 in the radial direction Y of the connecting sleeve 11, and the extension direction of the air inlet 1201 is parallel to the radial direction Y of the connecting sleeve 11. Therefore, on the one hand, radial air intake allows the gas to diffuse evenly along the circumference of the air supply chamber 101, avoiding airflow deviation or local high-pressure areas caused by unilateral air intake, thereby improving the uniformity of the air pressure distribution within the air supply chamber 101, making the subsequent airflow into the powder conveying pipeline 200 through the air supply port 1101 more stable, and reducing the risk of material deposition or blockage caused by uneven airflow; on the other hand, radial air intake ensures that the air pressure and flow rate of each air supply port 1101 are consistent, thereby avoiding the problem of uneven material conveying caused by excessively strong airflow in some air supply ports 1101 and insufficient airflow in others; furthermore, the radially entering gas forms a swirling or diffused flow within the air supply chamber 101, prolonging the gas residence time and making pressure fluctuations smoother, thereby reducing the interference of pulsed air supply on material flow.

[0041] Please refer to it again. Figure 2 and Figure 4The support pipe 111 is configured as a rigid pipe, and the bushing pipe 112 is configured as a non-metallic pipe. The bushing pipe 112 is used to connect with the powder conveying pipeline 200. Therefore, on the one hand, the support pipe 111 is fitted over the outside of the bushing pipe 112 and configured as a rigid pipe, thus providing external reinforcement for the bushing pipe 112 and preventing deformation or breakage due to high-pressure airflow or material impact. The rigid support pipe 111 can absorb external mechanical vibration to reduce the impact of thermal expansion and contraction on the bushing pipe 112. Furthermore, the separate design of the support pipe 111 and the bushing pipe 112 allows for individual disassembly or replacement of the bushing pipe 112 without replacing the entire pipeline pressurization body 10, reducing maintenance costs. On the other hand, the bushing pipe 112 is configured as a non-metallic pipe, avoiding the problem of metal fragments generated by friction between the powder and the bushing pipe 112, improving the purity and quality of the material, and meeting the high-purity requirements of new energy material processing.

[0042] Please refer to it again. Figure 1 The pipeline pressurization device 100 also includes a control valve 40. The control valve 40 is detachably mounted on the check valve 20. The control valve 40 is configured as a manual valve or an electric valve. Thus, the control valve 40 enables the pipeline pressurization device 100 to achieve automated and precise gas replenishment control functions. Simultaneously, the control valve 40 can also isolate impurities, ensuring powder purity and meeting the high-purity requirements of new energy material processing.

[0043] Please refer to it again. Figure 1 , Figure 2 and Figure 4 The powder conveying system 1000 includes a powder conveying pipeline 200 and the aforementioned pipeline pressurization device 100. The pipeline pressurization device 100 is installed on the powder conveying pipeline 200. The number of pipeline pressurization devices 100 may include one or more. Each pipeline pressurization device 100 is disposed between adjacent ends of the powder conveying pipeline 200.

[0044] In this embodiment, the radial dimension of the bushing 112 in the connecting sleeve 11 is equal to the radial dimension of the powder conveying pipe 200 in the connecting sleeve 11. Therefore, by setting the radial dimension of the bushing 112 in the connecting sleeve 11 to be equal to the radial dimension of the powder conveying pipe 200 in the connecting sleeve 11, the problem of unstable airflow caused by abrupt changes in the pipe cross-section can be avoided, ensuring uniform airflow velocity distribution, maintaining stable airflow and material flow. Furthermore, the equal diameter setting of the bushing 112 and the powder conveying pipe 200 can reduce installation complexity, reduce leakage risk, balance wear on the inner wall of the pipe, and extend the overall service life.

[0045] Of course, in some embodiments, the radial dimension of the bushing 112 in the connecting sleeve 11 may be slightly smaller or slightly larger than the radial dimension of the powder conveying pipe 200 in the connecting sleeve 11. This utility model embodiment does not make specific limitations.

[0046] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pipeline pressurization device (100), characterized in that, include: The pipeline pressurization body (10) includes a connecting sleeve (11) and an air replenishment shell (12). The air replenishment shell (12) is sealed on the outside of the connecting sleeve (11) and forms an air replenishment chamber (101) with the connecting sleeve (11). The air replenishment shell (12) is provided with an air inlet (1201) communicating with the air replenishment chamber (101). The connecting sleeve (11) is provided with a plurality of air replenishment ports (1101). The plurality of air replenishment ports (1101) are connected to the air replenishment chamber (101) and the powder conveying pipeline (200). A one-way valve (20) is installed at the air inlet (1201) and is used to introduce gas into the air inlet (1201). The air pipe (30) has one end connected to the one-way valve (20) and the other end connected to an external air source.

2. The pipeline pressurization device (100) as described in claim 1, characterized in that, The projections of the plurality of air inlets (1101) in the axial direction (X) perpendicular to the connecting sleeve (11) cover the perimeter of the cross-section of the connecting sleeve (11).

3. The pipeline pressurization device (100) as described in claim 1, characterized in that, The multiple air inlets (1101) are arranged in a spiral, matrix, ring or straight line configuration.

4. The pipeline pressurization device (100) as described in claim 1, characterized in that, The extension direction of the air inlet (1101) forms an angle (α) with the radial direction (Y) of the connecting sleeve (11) towards the powder conveying direction (F), and the angle (α) is 30°-60°.

5. The pipeline pressurization device (100) as described in claim 4, characterized in that, The pipeline pressurization device (100) also includes a nozzle (13), which is disposed in the air supply port (1101). The spray direction of the nozzle (13) forms an angle (α) with the radial direction (Y) of the connecting sleeve (11).

6. The pipeline pressurization device (100) as described in claim 4, characterized in that, Each of the air inlets (1101) includes a first air inlet (1102) and a second air inlet (1103) connected in sequence. The connecting sleeve (11) includes a support tube (111) and a bushing tube (112). The support tube (111) is sealed to the air inlet housing (12) and is sleeved on the outside of the bushing tube (112). The support tube (111) is provided with the first air inlet (1102), and the bushing tube (112) is provided with the second air inlet (1103). The extension direction of the first air inlet (1102) is parallel to the radial direction (Y) of the connecting sleeve (11), and the extension direction of the second air inlet (1103) forms the included angle (α) with the radial direction (Y) of the connecting sleeve (11).

7. The pipeline pressurization device (100) as described in any one of claims 1-6, characterized in that, The air inlet (1201) is located in the middle of the outer side wall of the air pipe (30) in the radial direction (Y) of the connecting sleeve (11), and the extension direction of the air inlet (1201) is parallel to the radial direction (Y) of the connecting sleeve (11).

8. The pipeline pressurization device (100) as described in any one of claims 1-6, characterized in that, The connecting sleeve (11) includes a support pipe (111) and a bushing (112). The support pipe (111) is sealed to the air supply housing (12) and is sleeved on the outside of the bushing (112). The support pipe (111) is configured as a rigid pipe, and the bushing (112) is configured as a non-metallic pipe. The bushing (112) is used to communicate with the powder conveying pipeline (200). The radial dimension of the bushing (112) in the connecting sleeve (11) is equal to the radial dimension of the powder conveying pipeline (200) in the connecting sleeve (11).

9. The pipeline pressurization device (100) as described in any one of claims 1-6, characterized in that, The pipeline pressurization device (100) further includes a control valve (40), which is detachably mounted on the check valve (20) and is configured as a manual valve or an electric valve.

10. A powder conveying system (1000), characterized in that, It includes a powder conveying pipeline (200) and a pipeline pressurization device (100) as described in any one of claims 1-9, wherein the pipeline pressurization device (100) is installed on the powder conveying pipeline (200).

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