Intelligent low-temperature and low-pressure powder conveying system

Abstract

The application relates to the technical field of powder conveying, in particular to an intelligent low-temperature and low-pressure powder conveying system. The conveying system utilizes low-temperature and low-pressure compressed air to convey powder, greatly reduces the temperature of the conveyed powder, and enables the conveyed powder to be directly applied to the production process of low-temperature concrete, thereby greatly improving the production efficiency; moreover, the low-temperature and low-pressure compressed air is used to convey the powder, so that the powder has small temperature rise, does not deteriorate, does not cake, and does not stick to the bin; the whole conveying system has low pressure, and has no risk of bin explosion, pipe explosion and dust collector explosion; in addition, the system can stably and reliably provide pure air, is not prone to pipe blockage, and has low system failure rate; the anti-pipe-blocking assembly arranged in the conveying system provides an efficient pipe-unblocking means for relieving external pipe blockage.

Description

Technical Field

[0001] This application relates to the field of powder conveying technology, and in particular to an intelligent low-temperature and low-pressure powder conveying system. Background Technology

[0002] Semi-trailers for transporting powdery materials, commonly known as powder tankers, are specialized vehicles for transporting dry powdery materials such as bulk cement and fly ash. These semi-trailers primarily employ pneumatic unloading. Their core working principle involves using an onboard air compressor to generate compressed air, which is then introduced into the air chamber at the bottom of the sealed tank through an air inlet pipe. This suspends and fluidizes the powdery materials on the fluidized bed. Once a sufficient pressure difference is established inside and outside the tank, the unloading valve is opened, allowing the material to be transported to the designated location along the unloading pipe by the airflow. These semi-trailers are characterized by fast unloading speed and low material residue.

[0003] However, due to the high temperature and pressure of the gas output from the on-board air compressor of the powder tanker, and the rapid friction that occurs during the fluidization and transportation of the powder, the temperature of the powder will rise sharply. This not only greatly increases the risk of silo bursting, but also generates a lot of heat during the subsequent concrete production process. For concrete with extremely high temperature requirements, the heated powder is not conducive to the subsequent low-temperature concrete production process. In addition, the powder tanker is prone to pipe blockage during the material transportation process.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this application is to provide an intelligent low-temperature and low-pressure powder conveying system to solve or alleviate the problems existing in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution: A smart low-temperature, low-pressure powder conveying system, the conveying system comprising: An air compressor, wherein the air compressor is used to provide an air source; A refrigerated air dryer, connected downstream of an air compressor via piping, is used to further remove moisture from compressed air and reduce the temperature of the compressed air; An air buffer tank is connected downstream of a refrigerated air dryer via a pipeline for temporarily storing compressed air. An air outlet is provided on the air buffer tank, which is used to communicate with the air inlet of a powder tanker truck. An anti-clogging pipe assembly is used to connect the unloading port of a powder tanker truck to a storage tank. The anti-clogging pipe assembly includes at least an outer pipe and an inner pipe. The outer pipe is sleeved around the inner pipe. One end of the inner pipe extends out of the outer pipe and is connected to a pulse air source mechanism. Multiple air outlets are evenly distributed on the inner pipe. The anti-clogging pipe assembly is also equipped with multiple unblocking mechanisms, each with a rotating impeller. By controlling the rotation of the impeller in the unblocking mechanism, the clogging of powder in the anti-clogging pipe assembly can be alleviated.

[0007] In the intelligent low-temperature and low-pressure powder conveying system described above, preferably, a first branch pipe and a second branch pipe are arranged in parallel at the air outlet of the air buffer tank, and the first branch pipe is used to connect to the air inlet of the powder tanker truck.

[0008] In the intelligent low-temperature and low-pressure powder conveying system described above, preferably, the pulse air source mechanism includes a pulse cylinder, which is provided with an air inlet and an air outlet. The second branch pipe is used to connect to the air inlet of the pulse cylinder. The air outlet of the pulse cylinder is connected to one end of the inner pipe that extends out of the outer pipe.

[0009] In the intelligent low-temperature and low-pressure powder conveying system described above, preferably, a first one-way valve is provided on the first branch pipe, a second one-way valve is provided on the second branch pipe, and a third one-way valve is provided on the portion of the inner pipe extending out of the outer pipe.

[0010] In the intelligent low-temperature and low-pressure powder conveying system described above, preferably, the pulse air source mechanism further includes a piston, a first servo motor, a crank, and a connecting rod. The piston is guided and movably disposed inside the pulse cylinder. The first servo motor is fixed inside the pulse cylinder. One end of the crank is hinged to the output end of the first servo motor, and the other end of the crank is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to the cylinder.

[0011] In the intelligent low-temperature and low-pressure powder conveying system described above, preferably, the unblocking mechanism includes a housing, and the impeller is rotatably mounted inside the housing via a bearing. The impeller is cylindrical, and multiple spiral blades are evenly distributed on the inner circumferential surface of the impeller. Both axial ends of the housing are provided with connection ports, which are connected to an outer pipe. The inner pipe passes through the housing and the impeller axially.

[0012] In the intelligent low-temperature and low-pressure powder conveying system described above, preferably, an external gear ring is fixed around the impeller, and a second servo motor is also fixed inside the housing. The output end of the second servo motor is connected to a drive gear, which meshes with the external gear ring for transmission.

[0013] In the intelligent low-temperature and low-pressure powder conveying system described above, preferably, each air outlet on the inner tube is equipped with a filter screen.

[0014] Preferably, the intelligent low-temperature and low-pressure powder conveying system described above further includes an oil-water separator, which is connected between the air compressor and the refrigerated air dryer via a pipeline.

[0015] Preferably, the intelligent low-temperature and low-pressure powder conveying system described above further includes a filter, which is connected between the refrigerated air dryer and the air buffer tank via a pipeline.

[0016] Compared with the closest prior art, the technical solution of this application has the following beneficial effects: This conveying system utilizes low-temperature, low-pressure compressed air for powder transport, significantly reducing the temperature of the conveyed powder and enabling it to be directly applied to the low-temperature concrete production process, thereby greatly improving production efficiency. Furthermore, the use of low-temperature, low-pressure compressed air minimizes powder temperature rise, prevents deterioration, clumping, and sticking to the silo. The entire conveying system operates at low pressure, eliminating the risk of silo bursts, pipe bursts, or dust collector failures. Additionally, the system reliably and stably provides clean air, minimizing pipe blockage and resulting in a low system failure rate.

[0017] Meanwhile, during the process of powder entering the storage tank from the powder tanker through the anti-clogging pipe assembly, the pulse air source mechanism and the unblocking mechanism in the anti-clogging pipe assembly can be activated periodically. The flow rate of powder entering the storage tank can also be observed in real time. When the flow rate of powder entering the storage tank decreases to a set value, the pulse air source mechanism and the unblocking mechanism are activated. When the pulse air source mechanism is activated, it delivers high-pressure airflow to the inner pipe. The high-pressure airflow is ejected from multiple air outlets in the inner pipe and enters the outer pipe to unblock the powder accumulated in the outer pipe. At the same time, it works in conjunction with activating the impeller in the unblocking mechanism to rotate, thereby alleviating the powder blockage in the anti-clogging pipe assembly and ensuring the smooth conveying of powder in the outer pipe. In other words, by setting the anti-clogging pipe assembly in this conveying system, an efficient unblocking method is provided to alleviate the blockage of the outer pipe. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein: Figure 1 This is a schematic diagram of a powder conveying system provided according to some embodiments of this application; Figure 2 This is a schematic diagram of a pulse gas source mechanism provided according to some embodiments of this application; Figure 3 This is a schematic diagram of a deblocking mechanism provided according to some embodiments of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Air compressor; 2. Oil-water separator; 3. Refrigerated air dryer; 4. Filter; 5. Air buffer tank; 6. First branch pipe; 7. First check valve; 8. Outer pipe; 9. Inner pipe; 10. Storage tank; 11. Unblocking mechanism; 111. Housing; 112. Bearing; 113. External gear ring; 114. Second servo motor; 115. Drive gear; 116. Impeller; 12. Third check valve; 13. Pulse air source mechanism; 131. Pulse cylinder; 132. Piston; 133. Connecting rod; 134. Crank; 135. First servo motor; 14. Second check valve; 15. Second branch pipe. Detailed Implementation

[0020] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of interpretation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature represented or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0021] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.

[0023] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The present application will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0025] According to specific embodiments of this application, such as Figure 1-3 As shown, this application provides an intelligent low-temperature and low-pressure powder conveying system, the conveying system comprising: Air compressor 1 is used to provide an air source. The refrigerated air dryer 3 is connected downstream of the air compressor 1 via a pipeline to further remove moisture from the compressed air and reduce the temperature of the compressed air.

[0026] Air buffer tank 5 is connected downstream of refrigerated air dryer 3 via a pipeline for temporarily storing compressed air. Air buffer tank 5 is provided with an air outlet for communication with the air inlet of powder tanker truck.

[0027] The anti-blocking pipe assembly is used to connect the unloading port of the powder tanker truck to the storage tank 10. The anti-blocking pipe assembly includes at least an outer pipe 8 and an inner pipe 9. The outer pipe 8 is sleeved around the inner pipe 9. One end of the inner pipe 9 extends out of the outer pipe 8 and is connected to the pulse air source mechanism 13. Multiple air outlets are evenly distributed on the inner pipe 9.

[0028] The anti-clogging pipe assembly is also equipped with multiple unblocking mechanisms 11. Each unblocking mechanism 11 has a rotating impeller 116. By controlling the rotation of the impeller 116 in the unblocking mechanism 11, the powder blockage in the anti-clogging pipe assembly can be alleviated.

[0029] When the conveying system is in use, the compressed air produced by the air compressor 1 is first filtered by the oil-water separator 2, and then the compressed air is further filtered by the refrigerated air dryer 3 to remove moisture and reduce the temperature of the compressed air so that the compressed air reaches the set temperature for transporting powder. Then, the compressed air is further filtered by the filter 4 to ensure the purity of the compressed air. Finally, the compressed air is temporarily stored in the air buffer tank 5.

[0030] When using this conveying system, connect the air outlet to the air inlet on the powder tanker truck through a pipeline, connect the unloading port on the powder tanker truck to the storage tank 10 through an anti-clogging pipe assembly, and then start the air compressor 1 so that the compressed air passes through the oil-water separator 2, the refrigerated air dryer 3 and the filter 4 and enters the air buffer tank 5. When the compressed air in the air buffer tank 5 reaches the set pressure, open the valve to allow the low-temperature and low-pressure compressed air to enter the powder tanker truck and carry the powder in the powder tanker truck into the storage tank 10.

[0031] This conveying system utilizes low-temperature, low-pressure compressed air for powder transport, significantly reducing the temperature of the conveyed powder and enabling it to be directly applied to the low-temperature concrete production process, thereby greatly improving production efficiency. Furthermore, the use of low-temperature, low-pressure compressed air minimizes powder temperature rise, prevents deterioration, clumping, and sticking to the silo. The entire conveying system operates at low pressure, eliminating the risk of silo bursts, pipe bursts, or dust collector failures. Additionally, the system reliably and stably provides clean air, minimizing pipe blockage and resulting in a low system failure rate.

[0032] Meanwhile, during the process of the powder material in the powder tanker entering the storage tank 10 through the anti-blocking pipe assembly, the pulse air source mechanism 13 and the unblocking mechanism 11 in the anti-blocking pipe assembly can be activated periodically; the flow rate of the powder material entering the storage tank 10 can also be observed in real time. When the flow rate of the powder material entering the storage tank 10 decreases to a set value, the pulse air source mechanism 13 and the unblocking mechanism 11 are activated; when the pulse air source mechanism 13 is activated, it delivers high-pressure airflow to the inner pipe 9. The high-pressure airflow is ejected from multiple air outlets in the inner pipe 9 and enters the outer pipe 8 to unblock the powder material accumulated in the outer pipe 8. At the same time, it cooperates with the activation of the impeller 116 in the unblocking mechanism 11 to rotate, thereby relieving the powder blockage in the anti-blocking pipe assembly, thus ensuring the smooth conveying of powder material in the outer pipe 8. That is, by setting the anti-blocking pipe assembly in this conveying system, an efficient unblocking method is provided to relieve the blockage of the outer pipe 8.

[0033] A first branch pipe 6 and a second branch pipe 15 are arranged side by side at the air outlet of the air buffer tank 5. The first branch pipe 6 is used to connect to the air inlet of the powder tanker truck. In this embodiment, the low-temperature air in the air buffer tank 5 is supplied to the powder tanker truck through the first branch pipe 6 to ensure that the air source supplied to the powder tanker truck has a low temperature, which is beneficial to the subsequent powder transportation.

[0034] The pulse air source mechanism 13 includes a pulse cylinder 131, which has an air inlet and an air outlet. A second branch pipe 15 is used to connect to the air inlet of the pulse cylinder 131. The air outlet of the pulse cylinder 131 is connected to one end of the inner pipe 9 that extends out of the outer pipe 8. In this embodiment, the air buffer tank 5 serves not only as the air source for the powder tanker truck but also as the air source for the pulse cylinder 131. That is, the low-temperature air in the air buffer tank 5 is supplied to the pulse cylinder 131 through the second branch pipe 15, thereby ensuring that the pulse air source mechanism 13 also supplies low-temperature air to the inner pipe 9. In other words, the air blown from the inner pipe 9 to the outer pipe 8 during unblocking is low-temperature air, ensuring that the powder material only comes into contact with low-temperature air throughout the entire conveying process, thereby minimizing the occurrence of a significant temperature rise during the separation and conveying process.

[0035] A first one-way valve 7 is installed on the first branch pipe 6, a second one-way valve 14 is installed on the second branch pipe 15, and a third one-way valve 12 is installed on the portion of the inner pipe 9 extending out of the outer pipe 8. In this embodiment, one-way valves are installed on the first branch pipe 6, the second branch pipe 15, and the portion of the inner pipe 9 extending out of the outer pipe 8 to ensure that the gas in the first branch pipe 6 can only flow from the air buffer tank 5 to the powder tanker truck, the gas in the second branch pipe 15 can only flow from the air buffer tank 5 to the pulse cylinder 131, and the gas in the inner pipe 9 can only flow from the pulse cylinder 131 to the downstream direction of the inner pipe 9. The gas on these pipes can only flow in one direction, thereby preventing downstream powder from flowing back into the above-mentioned pipes.

[0036] The pulse air source mechanism 13 also includes a piston 132, a first servo motor 135, a crank 134, and a connecting rod 133. The piston 132 is guided and movably disposed in the pulse cylinder 131. The first servo motor 135 is fixed in the pulse cylinder 131. One end of the crank 134 is hinged to the output end of the first servo motor 135, and the other end of the crank 134 is hinged to one end of the connecting rod 133. The other end of the connecting rod 133 is hinged to the cylinder.

[0037] In this embodiment, the first servo motor 135 is located above the piston 132, and the air outlet and air inlet of the pulse cylinder 131 are both located below the piston 132. When the pulse air source mechanism 13 needs to be activated to unblock the blockage, the first servo motor 135 is activated, and the first servo motor 135 drives the crank 134 to rotate. The crank 134 drives the piston 132 to move up and down in the pulse cylinder 131 through the connecting rod 133. When the piston 132 moves upward, the second one-way valve on the second branch pipe 15 activates. When valve 14 is opened, the third one-way valve 12 on the inner tube 9 is closed, and the low-temperature gas enters the pulse cylinder 131 through the second branch pipe 15. When piston 132 moves downward, the second one-way valve 14 on the second branch pipe 15 is closed, and the third one-way valve 12 on the inner tube 9 is opened. The low-temperature gas in the pulse cylinder 131 is pressed into the inner tube 9 by piston 132, so that the low-temperature gas is ejected from the outlet hole on the inner tube 9, so as to disturb the powder between the outer tube 8 and the inner tube 9, thereby relieving the powder blockage in the pipeline.

[0038] The unblocking mechanism 11 includes a housing 111, and an impeller 116 is rotatably mounted inside the housing 111 via a bearing 112. The impeller 116 is cylindrical and has multiple spiral blades evenly distributed on its inner circumferential surface. Both axial ends of the housing 111 are provided with connection ports, which are connected to the outer tube 8. The inner tube 9 passes through the housing 111 and the impeller 116 along the axial direction.

[0039] In this embodiment, the outer shell 111 is a stepped cylindrical structure. The outer shell 111 can be divided into two parts at the maximum cross-section. The two parts of the outer shell 111 are connected to each other by bolts. This arrangement facilitates the disassembly, assembly, maintenance and repair of the unblocking mechanism 11. The two ends of the outer shell 111 are connected to the outer tube 8 through connection ports. The inner tube 9 can pass directly through the center of the outer shell 111. The unblocking mechanism 11 can be installed near the location where the branch outlet is set on the outer tube 8, or in other places where blockage is likely to occur.

[0040] The impeller 116 is cylindrical in shape, and multiple spiral blades are evenly arranged on the inner circumferential surface of the cylindrical impeller 116. When the unblocking mechanism 11 needs to be activated to alleviate the powder blockage in the outer tube 8, the impeller 116 is rotated. At this time, the spiral blades arranged in the inner ring of the impeller 116 rotate, which will disturb the powder passing through the unblocking mechanism 11, thereby pushing the powder forward and alleviating the accumulation of powder in the outer tube 8.

[0041] Among them, elastic sealing rings are provided at both ends of the impeller 116 and between the impeller 116 and the outer casing 111. The elastic sealing rings seal the gap between the impeller 116 and the outer casing 111 to prevent powder from passing through the gap between the impeller 116 and the outer casing 111 as much as possible.

[0042] An external gear ring 113 is fixed to the periphery of the impeller 116, and a second servo motor 114 is also fixed inside the housing 111. The output end of the second servo motor 114 is connected to a drive gear 115, which meshes with the external gear ring 113 for transmission. In this embodiment, when the unblocking mechanism 11 needs to be activated, the second servo motor 114 is started, driving the drive gear 115 to rotate. The drive gear 115 meshes with the external gear ring 113 to drive the impeller 116 to rotate.

[0043] Each air outlet on the inner tube 9 is surrounded by a filter screen. In this embodiment, each air outlet on the inner tube 9 is surrounded by a filter screen to minimize the amount of powder entering the inner tube 9.

[0044] The delivery system also includes an oil-water separator 2, which is connected between the air compressor 1 and the refrigerated air dryer 3 via a pipeline. In this embodiment, the oil-water separator 2 is used to separate moisture and oil from the compressed air, thus achieving preliminary filtration of the compressed air produced by the air compressor 1 and helping to ensure the cleanliness of the compressed air.

[0045] The conveying system also includes a filter 4, which is connected between the refrigerated air dryer 3 and the air buffer tank 5 via a pipeline. In this embodiment, the filter 4 is used to further filter impurities in the compressed air. The number of filters 4 can be selected according to usage needs. In this embodiment, two filters 4 can be installed between the refrigerated air dryer 3 and the air buffer tank 5. By using multiple filters 4 to further filter impurities in the compressed air, the purity of the compressed air can be further improved, and the impact of impurities in the compressed air on the conveyed powder can be minimized, which is beneficial for the subsequent use of the compressed air.

[0046] In this embodiment, valves can be installed on necessary pipelines in the conveying system to control the switching between on and off states of the corresponding pipelines; wherein, the valves can be electromagnetic valves for easier control.

[0047] In this embodiment, a microcontroller can also be installed in the conveying system, and flow sensors can be installed at easily clogged locations in the pipeline to monitor the flow rate of powder in the pipeline. The flow sensors, air compressor 1, refrigerated air dryer 3, oil-water separator 2, first servo motor 135, second servo motor 114, and all solenoid valves are connected to the microcontroller and controlled collaboratively. When the flow sensor detects that the flow rate of powder in the pipeline is less than a set value, the microcontroller controls the corresponding solenoid valve to open and simultaneously controls the first servo motor 135 and second servo motor 114 to start, thereby activating the pulse air source mechanism 13 and the unblocking mechanism 11 to unblock the accumulated powder in the pipeline. In other embodiments, the air compressor 1, refrigerated air dryer 3, oil-water separator 2, first servo motor 135, second servo motor 114, and all solenoid valves can also be directly controlled manually according to the specific production situation.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An intelligent low-temperature and low-pressure powder conveying system, characterized in that, The conveying system includes: An air compressor, wherein the air compressor is used to provide an air source; A refrigerated air dryer, connected downstream of an air compressor via piping, is used to further remove moisture from compressed air and reduce the temperature of the compressed air; An air buffer tank is connected downstream of a refrigerated air dryer via a pipeline for temporarily storing compressed air. An air outlet is provided on the air buffer tank, which is used to communicate with the air inlet of a powder tanker truck. An anti-clogging pipe assembly is used to connect the unloading port of a powder tanker truck to a storage tank. The anti-clogging pipe assembly includes at least an outer pipe and an inner pipe. The outer pipe is sleeved around the inner pipe. One end of the inner pipe extends out of the outer pipe and is connected to a pulse air source mechanism. Multiple air outlets are evenly distributed on the inner pipe. The anti-clogging pipe assembly is also equipped with multiple unblocking mechanisms, each with a rotating impeller. By controlling the rotation of the impeller in the unblocking mechanism, the clogging of powder in the anti-clogging pipe assembly can be alleviated.

2. The intelligent low-temperature and low-pressure powder conveying system according to claim 1, characterized in that, The air outlet of the air buffer tank has a first branch pipe and a second branch pipe in parallel, and the first branch pipe is used to connect to the air inlet of the powder tanker.

3. The intelligent low-temperature and low-pressure powder conveying system according to claim 2, characterized in that, The pulse air source mechanism includes a pulse cylinder, which has an air inlet and an air outlet. The second branch pipe is used to connect to the air inlet of the pulse cylinder. The air outlet of the pulse cylinder is connected to one end of the inner pipe that extends out of the outer pipe.

4. The intelligent low-temperature and low-pressure powder conveying system according to claim 3, characterized in that, A first check valve is provided on the first branch pipe, a second check valve is provided on the second branch pipe, and a third check valve is provided on the portion of the inner pipe extending out of the outer pipe.

5. The intelligent low-temperature and low-pressure powder conveying system according to claim 4, characterized in that, The pulse air source mechanism also includes a piston, a first servo motor, a crank, and a connecting rod. The piston is guided and movably disposed inside the pulse cylinder. The first servo motor is fixed inside the pulse cylinder. One end of the crank is hinged to the output end of the first servo motor, and the other end of the crank is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to the cylinder.

6. The intelligent low-temperature and low-pressure powder conveying system according to claim 1, characterized in that, The unblocking mechanism includes a housing, and the impeller is rotatably mounted inside the housing via a bearing. The impeller is cylindrical and has multiple spiral blades evenly distributed on its inner circumferential surface. Both ends of the housing have connection ports, which are connected to an outer tube. The inner tube passes through the housing and the impeller axially.

7. The intelligent low-temperature and low-pressure powder conveying system according to claim 6, characterized in that, An external gear ring is fixed around the impeller, and a second servo motor is also fixed inside the housing. The output end of the second servo motor is connected to a drive gear, which meshes with the external gear ring for transmission.

8. The intelligent low-temperature and low-pressure powder conveying system according to any one of claims 1-7, characterized in that, Each air outlet on the inner tube is surrounded by a filter screen.

9. The intelligent low-temperature and low-pressure powder conveying system according to any one of claims 1-7, characterized in that, The delivery system also includes an oil-water separator, which is connected between the air compressor and the refrigerated air dryer via a pipeline.

10. The intelligent low-temperature and low-pressure powder conveying system according to any one of claims 1-7, characterized in that, The delivery system also includes a filter, which is connected between the refrigerated air dryer and the air buffer tank via a pipeline.

Images