Vacuum heat preservation conveying pipe device and pipeline conveying system

Abstract

The invention discloses a vacuum heat preservation conveying pipe device and a pipeline conveying system, the pipeline conveying system comprises two conveying pipe devices, a pump and a control unit, each conveying pipe device comprises an inner pipe, an outer pipe and an electric heating structure, each inner pipe is arranged in the corresponding outer pipe, and each outer pipe is arranged in the corresponding electric heating structure. A closed cavity is formed between each inner pipe and each outer pipe, each electric heating structure surrounds each inner pipe, each inner pipe is connected and communicated, the pump pumps air in each cavity to enable each cavity to be in a vacuum state, the control unit controls the operation states of each electric heating structure and the pump, heat energy transmitted outwards through each outer pipe is reduced, and the heat energy utilization rate is improved. The inner pipe is easily kept at a default temperature, and the electric energy consumption of each electric heating structure is reduced.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of electric heat insulation for pipelines for transporting flowable substances, and in particular to a vacuum-insulated pipeline device and a pipeline transportation system. BACKGROUND

[0002] Based on the specific needs of transporting certain substances, pipelines for transporting such substances need to be insulated. In addition to means for reducing heat loss, if the lost heat can be supplemented in a timely manner, the temperature of the pipeline can be maintained. Based on these needs, an electric heat insulation device for pipelines is developed.

[0003] The conventional electric heat insulation device for pipelines includes an outer skin, an insulation layer, and a heating device. The outer skin includes an inner side wall, an outer side wall, and a containing space between the inner side wall and the outer side wall, the inner side wall is used to cover a pipeline, the insulation layer is arranged in the containing space, the insulation layer includes an aerogel felt and a film, the film covers the aerogel felt, and the heating device is arranged in the containing space, the heating device has an electric heating plate, the electric heating plate abuts against the inner side wall, and the electric heating plate is mainly composed of a heat-resistant and insulating substrate with a conductive circuit. By using the impedance characteristics of the conductive circuit, when current passes through the conductive circuit, the conductive circuit generates heat to heat the pipeline. SUMMARY

[0004] The main purpose of the present invention is to provide a vacuum-insulated pipeline device and a pipeline transportation system.

[0005] To achieve the above-mentioned purposes, the present invention adopts the following technical solutions.

[0006] A vacuum-insulated pipeline device includes an inner pipe, an outer pipe, and an electric heating structure. The inner pipe is used to transport flowable substances. The inner pipe is arranged in a chamber formed in the inner pipe. Two sealing structures are arranged at the two ends of the chamber along the axial direction of the outer pipe. The two ends of the inner pipe extend to the outside of the outer pipe through the sealing structures, respectively. A one-way valve is arranged in the outer pipe and communicates with the chamber. The electric heating structure is arranged in the chamber and surrounds the outer part of the inner pipe. A distance is formed between the electric heating structure and the pipe wall of the outer pipe facing the chamber. The outer pipe forms a setting hole communicating with the chamber and the outer periphery of the outer pipe. An electrical port is arranged in the setting hole and forms an airtight combination with the outer pipe. The electric heating structure is electrically connected to the electrical port.

[0007] A temperature sensor and a pressure sensor are arranged in the chamber, respectively. The temperature sensor and the pressure sensor are electrically connected to the electrical port, respectively. The temperature sensor is connected to the inner pipe and is used to sense the temperature of the inner pipe. The pressure sensor is used to sense the pressure of the chamber.

[0008] A pipeline delivery system, comprising two delivery pipe devices, a linking structure, a suction pipeline, a pump and a control unit, wherein each delivery pipe device is the aforementioned vacuum insulated delivery pipe device, each delivery pipe device is arranged in sequence, the linking structure links adjacent inner pipes, the suction pipeline connects each one-way switch valve and the pump, and the pump extracts air inside each chamber through the suction pipeline.

[0009] The control unit is mainly composed of electronic circuits, including two controllers, two temperature sensors and two air pressure sensors, wherein each delivery pipe device is respectively configured with a controller, each controller is respectively electrically connected to each electrical port of each delivery pipe device and each one-way switch valve configured therewith, each temperature sensor respectively senses the temperature of each inner pipe and transmits the sensed temperature data to the corresponding controller, each air pressure sensor respectively senses the air pressure of each chamber and transmits the air pressure data to the corresponding controller, each controller respectively includes a microprocessor, and each microprocessor respectively runs an application program, according to which each microprocessor respectively controls the operating state of each heating structure, the pump and the communication or blockage state of each one-way switch valve based on the temperature data and the air pressure data.

[0010] The vacuum state of each chamber can reduce the heat energy of the inner pipe and each heating structure being transmitted to the outside through each outer pipe, so that the inner pipe is easily maintained at a default temperature, and the power consumption of each heating structure for heating to maintain the temperature of each inner pipe is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a cross-sectional view of the delivery pipe device of the preferred embodiment of the present application.

[0012] Figure 2 is Figure 1 is a partial enlarged view of

[0013] Figure 3 is a partial system architecture diagram of the preferred embodiment of the present application.

[0014] Figure 4 is a partial cross-sectional schematic view of the preferred embodiment of the present application, showing the linking structure linking two adjacent delivery pipe devices.

[0015] Figure 5 is a circuit block diagram of the preferred embodiment of the present application. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present application shown in the drawings are only for illustration and use, and the patent application is not limited by the structure.

[0017] As Figures 1 to 5As shown, a preferred embodiment of the pipeline delivery system of the present invention includes several delivery pipe devices 01, a connecting structure 02, a vacuum pipe 03, a pump 04, and a control unit 05. Each delivery pipe device 01 is a vacuum-insulated delivery pipe device. Each delivery pipe device 01 includes an inner pipe 10, an outer pipe 20, and an electrothermal structure 30. Each inner pipe 10 is used to deliver a flowable substance (not shown in the figure). Each outer pipe 20 forms a chamber 22 inside. Each inner pipe 10 is disposed in each chamber 22. Several sealing structures 40 seal both ends of each chamber 22 along the axial direction of each outer pipe 20, and each sealing structure 40 is connected to each outer pipe 20. Both ends of each inner pipe 10 extend through each sealing structure 40 to the outside of each outer pipe 20.

[0018] Each inner tube 10, each outer tube 20, and each closed structure 40 is made of metal material, and each inner tube 10 and each outer tube 20 are connected to the corresponding closed structure 40 by welding, thereby forming a rigid structure that can withstand air pressure without deformation.

[0019] Each conveying pipe device 01 is arranged in sequence, and each inner pipe 10 is arranged in sequence along the axial direction. The connecting structure 02 connects the adjacent inner pipes 10, so that the axially adjacent inner pipes 10 are connected. One inner pipe 10 is connected to the source of the substance (not shown in the figure), and the other inner pipe 10 is connected to an external device (not shown in the figure), so that the substance flows from the source into the device through each inner pipe 10 in sequence.

[0020] Figure 3 The preferred embodiment shows at least two conveying pipe devices 01. This should not be interpreted as meaning that the number of conveying pipe devices 01 constituting the pipeline conveying system of the present invention can only be two. The number of connecting structures 02 varies with the number of conveying pipe devices 01, so that every two axially adjacent inner pipes 10 are connected by a connecting structure 02.

[0021] Several one-way valves 52 are respectively installed on each outer tube 20 and connected to each chamber 22. Each outer tube 20 is equipped with at least one one-way valve 52. In this example, each outer tube 20 is equipped with two one-way valves 52. The air extraction pipeline 03 is connected to each one-way valve 52 and the pump 04. The pump 04 is used to extract air from the inside of each chamber 22 through the air extraction pipeline 03, so that each chamber 22 forms a vacuum state.

[0022] Each one-way valve 52 is used to control the air flow to the extraction line 03 from each chamber 22. Air cannot enter each chamber 22 through each one-way valve 52. Each one-way valve 52 can be selected to be open or closed as needed. The pump 04 can extract air from the chamber 22 it is connected to through one or more one-way valves 52 in the open state. The pump 04 cannot extract air from the chamber 22 it is connected to through one or more one-way valves 52 in the closed state.

[0023] Each heating element 30 is disposed in each chamber 22, and each heating element 30 surrounds the outside of each inner tube 10. Each heating element 30 is separated from the tube wall 24 of each outer tube 20 facing each chamber 22, so that each heating element 30 will not contact the tube wall 24, thus avoiding the transfer of heat energy from each heating element 30 to each outer tube 20 through contact conduction. Each heating element 30 is mainly composed of at least one heating element (not shown in the figure).

[0024] Each outer tube 20 forms a hole 26 to connect each chamber 22 and the outer periphery of each outer tube 20. Two electrical ports 28 are respectively disposed in each hole 26 and form an airtight connection with each outer tube 20, thereby preventing air from penetrating into each chamber 22 through the gap between each electrical port 28 and each hole 26. Each electrothermal structure 30 is electrically connected to each electrical port 28.

[0025] The connecting structure 02, each one-way switching valve 52, each electrothermal structure 30 and each electrical port 28 are existing technologies familiar to those skilled in the art to which this invention pertains, and their specific structures will not be described in detail.

[0026] The control unit 05 is mainly composed of electronic circuits, including two controllers 62, several temperature sensors 64 and several pressure sensors 66. Each controller 62 is electrically connected to each electrical port 28, each temperature sensor 64 is connected to each inner tube 10, and each pressure sensor 66 is located in each chamber 22. Each delivery pipe device 01 is provided with one electrical port 28 and one controller 62. Each controller 62 is electrically connected to each electrical port 28 of the delivery pipe device 01 it is configured with and to each one-way valve 52. Each delivery pipe device 01 is configured with at least one temperature sensor 64 and at least one pressure sensor 66.

[0027] Each temperature sensor 64 and each pressure sensor 66 is electrically connected to each electrical port 28. Each temperature sensor 64 senses the temperature of each inner tube 10 and transmits the sensed temperature data to the corresponding controller 62 through each electrical port 28. Each pressure sensor 66 senses the air pressure of each chamber 22 and transmits the sensed air pressure data to the corresponding controller 62 through each electrical port 28. Each controller 62 includes a microprocessor 68, and each microprocessor 68 runs an application program. Accordingly, each microprocessor 68 controls the operation status of each heating element 30 and pump 04 and the connection or disconnection status of each one-way valve 52 based on the temperature data and the air pressure data.

[0028] Each controller 62 receives temperature data and air pressure data respectively. After comparison, each microprocessor 68 determines the difference between each temperature data and air pressure data and the default temperature and default air pressure respectively, and selects to control the corresponding electric heating structure 30, pump 04 and corresponding one-way valve 52 respectively, so that the corresponding inner tube 10 can be maintained at the default temperature and the corresponding chamber 22 can be maintained in a vacuum state. The vacuum state refers to the state in which the air pressure in each chamber 22 is less than the atmospheric pressure, and is not limited to the air pressure in each chamber 22 having to be zero.

[0029] The control unit 05 controls the mode of pump 04, including controlling whether pump 04 is running or not, and the output power when pump 04 is running.

[0030] The vacuum state of each chamber 22 can reduce the heat energy of the inner tube 10 and each electric heating structure 30 transferred to the outside through each outer tube 20, making it easier for the inner tube 10 to be maintained at the default temperature, and reducing the electrical energy consumption required by each electric heating structure 30 to heat up in order to maintain the temperature of each inner tube 10.

[0031] If the heating element 30 of a certain delivery pipe device 01 fails to operate normally, or if an outer pipe 20 or a closed structure 40 ruptures, causing external air to seep into the chamber 22 inside the outer pipe 20, the delivery pipe device 01 can be removed for repair or replacement. In this case, the controller 62 corresponding to the other unremoved delivery pipe devices 01 controls the opening or closing state of the corresponding one-way valves 52, so that the chambers 22 inside the unremoved delivery pipe devices 01 can be kept in a vacuum state, and the corresponding inner pipes 10 can be kept in a vacuum state. Maintaining the default temperature, once the removed delivery pipe device 01 has been repaired or replaced with a new one, the pump 04 only needs to operate to extract the air from the chamber 22 inside the repaired or replaced delivery pipe device 01, causing its air pressure to drop to a vacuum state. The control unit 05 only needs to control the corresponding heating structure 30 to heat up and cause the inner tube 10 to return to the default temperature. The operation of repairing or replacing the delivery pipe device 01 is easy to carry out, and after the delivery pipe device 01 is repaired or replaced, the preferred embodiment requires a short time to resume operation and consumes less power overall.

[0032] Each conveying pipe device 01 further includes a first heat insulation felt 54 and a second heat insulation felt 56, wherein each first heat insulation felt 54 and each second heat insulation felt 56 are respectively made of aerogel composite nanomaterial with heat insulation effect. Each first heat insulation felt 54 is respectively disposed in the chamber 22. Each first heat insulation felt 54 is respectively annularly surrounding the outside of each electric heating structure 30 and each inner tube 10, and each first heat insulation felt 54 is separated from each tube wall 24, so that each first heat insulation felt 54 does not contact the outer tube 20, thereby preventing heat energy from being transferred to each outer tube 20 through contact conduction. Each second heat insulation felt 56 respectively covers the outside of each outer tube 20 and each closed structure 40, thereby reducing the heat energy dissipation to the outside through each outer tube 20 and each closed structure 40.

[0033] The connecting structure 02 is covered with a heat insulation part 58, which is used to reduce the heat energy dissipated to the outside through the connecting structure 02.

[0034] The control unit 05 further includes a display 72 and an operating device 74, wherein the display 72 and the operating device 74 are respectively coupled to each controller 62. The display 72 is used to display various temperature data and various air pressure data, and the operating device 74 is mainly composed of electronic circuits and is used to operate and control each controller 62.

[0035] Each controller 62 transmits temperature and air pressure data of its configured delivery pipe device 01 to the display 72, enabling management and maintenance personnel to remotely monitor each delivery pipe device 01 through the display 72. This allows them to detect abnormalities and the delivery pipe device 01 where the abnormality occurs, facilitating timely repair or replacement of abnormal delivery pipe devices 01 or pumps 04 by management and maintenance personnel, thereby improving the efficiency of system maintenance and repair.

[0036] With the operation device 74 in place, system administrators and maintenance personnel can, based on whether each component is malfunctioning, maintain or update hardware components, upgrade or update applications, or other needs, switch to manual operation methods in a timely manner, and use higher system management authority to replace one or more selected controllers 62 to intervene in the control of the corresponding delivery pipe device 01 or pump 04. System administrators and maintenance personnel can also operate the operation device 74 to change the set temperature and set air pressure.

Claims

1. A vacuum-insulated conveying pipe device, characterized in that... The device includes an inner tube, an outer tube, and an electrothermal structure. The inner tube is used to transport a flowable substance. The outer tube forms a chamber inside, and the inner tube is located in the chamber. Two sealing structures respectively seal the two ends of the chamber along the axial direction of the outer tube. The two ends of the inner tube extend through the sealing structures to the outside of the outer tube. A one-way valve is located in the outer tube and connects to the chamber. The electrothermal structure is located in the chamber and surrounds the outside of the inner tube. A distance is formed between the electrothermal structure and the tube wall of the outer tube facing the chamber. The outer tube forms a hole that connects the chamber and the outer periphery of the outer tube. An electrical port is located in the hole and forms an airtight connection with the outer tube. The electrothermal structure is electrically connected to the electrical port. A temperature sensor and a pressure sensor are respectively located in the chamber, and the temperature sensor and the pressure sensor are electrically connected to electrical ports. The temperature sensor is connected to the inner tube and is used to sense the temperature of the inner tube, and the pressure sensor is used to sense the pressure of the chamber.

2. The vacuum-insulated conveying pipe device as described in claim 1, characterized in that... It further includes a first heat insulation felt disposed in the chamber, wherein the first heat insulation felt is arranged in a ring around the outside of the electric heating structure and the inner tube, and a distance is formed between the first heat insulation felt and the tube wall.

3. The vacuum-insulated conveying pipe device as described in claim 1, characterized in that... It also includes a second insulation felt covering the outer tube and the exterior of each enclosed structure.

4. A pipeline delivery system, characterized in that... It includes two delivery pipe devices, a connecting structure, an air extraction pipeline, a pump and a control unit, wherein each delivery pipe device is the vacuum insulation delivery pipe device as described in claim 1, and the delivery pipe devices are arranged in sequence. The connecting structure connects the adjacent inner pipes, and the air extraction pipeline connects the one-way valves and the pump. The pump is used to extract air from the inside of each chamber. The control unit is mainly composed of electronic circuits, including two controllers, two temperature sensors, and two pressure sensors. Each delivery pipe device is equipped with a corresponding controller. Each controller is electrically connected to the electrical ports of its respective delivery pipe device and each one-way valve. Each temperature sensor is used to sense the temperature of each inner pipe and transmit the sensed temperature data to the corresponding controller. Each pressure sensor is used to sense the air pressure of each chamber and transmit the air pressure data to the corresponding controller. Each controller includes a microprocessor, and each microprocessor runs an application program, thereby controlling each electrothermal structure, pump, and one-way valve.

5. The pipeline transportation system as described in claim 4, characterized in that... The connecting structure is covered with an insulation part.

6. The pipeline transportation system as described in claim 4, characterized in that... The control unit further includes a display and an operating device, which are respectively coupled to each controller. The display is used to display temperature data and air pressure data, and the operating device is mainly composed of electronic circuits and is used to operate and control each controller.

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