Compressed air heating device

Abstract

The application provides a compressed air heating device, which comprises a shell, a cylindrical electric heating rod arranged at a middle position of the shell, an annular cavity formed by the electric heating rod and the inner wall of the shell, a plurality of baffles arranged in an annular manner and in contact with the electric heating rod in the annular cavity, a plurality of independent heating cavities formed by the plurality of baffles, an air inlet pipe and an air outlet pipe connected to the heating cavities on the two sides of one baffle, air vents opened in the remaining baffles, and the air vents of two adjacent baffles located at the two ends of the shell respectively. The application can shorten the length of the shell and reduce the occupied space of the shell while ensuring the heating effect of the compressed air.

Description

Technical Field

[0001] This application relates to air heating technology, and more particularly to a compressed air heating device. Background Technology

[0002] In the production of granulated sand, the compressed air used in the granulated sand blowing system needs to be heated first to reduce the granulated sand's solidification rate before blowing.

[0003] Currently, a compressed air heating device used in abrasive blasting includes a housing. Inside the housing is an electric heating structure for heating compressed air. One end of the housing has an inlet pipe, and the other end has an outlet pipe. In use, compressed air enters the housing through the inlet pipe and flows along the housing to the outlet pipe. As the compressed air flows along the housing, the electric heating structure heats the compressed air inside the housing. The heated compressed air then flows out through the outlet pipe and enters the abrasive blasting system.

[0004] However, in actual use, the compressed air flows relatively fast inside the housing, resulting in a short residence time and poor heating effect. Moreover, the compressed air needs to be heated to above 200°C. In order to ensure the heating effect of the compressed air, the length of the housing is generally long, which leads to a large volume of the housing and a large space occupied by the housing. Utility Model Content

[0005] This application provides a compressed air heating device to solve the problem that the existing compressed air heating device used in abrasive spraying is too long and occupies a lot of space.

[0006] This application provides a compressed air heating device, including a housing, wherein a cylindrical electric heating rod is provided at the middle position of the housing, and the electric heating rod and the inner wall of the housing form an annular cavity; The annular cavity is provided with multiple partitions arranged in a ring and in contact with the electric heating rod. The multiple partitions divide the annular cavity into multiple independent heating chambers. One of the partitions has heating chambers on both sides connected to an air inlet pipe and an air outlet pipe, respectively. The remaining partitions all have vents, and the vents of two adjacent partitions are located at opposite ends of the shell.

[0007] Optionally, the partition is made of a thermally conductive material.

[0008] Optionally, the interior of the heating cavity is provided with a heat-conducting structure connected to the partition and distributed along the axial direction of the shell.

[0009] Optionally, the heat-conducting structure includes multiple heat-conducting elements distributed along the axial direction of the shell, and the heat-conducting elements include multiple arc-shaped tubes located in the same plane and distributed radially along the shell, and the surface of the arc-shaped tubes is covered with multiple uniformly distributed heat-conducting sheets; Both the arc-shaped tube and the heat-conducting plate are made of heat-conducting materials.

[0010] Optionally, one end of the housing is provided with a connection port, through which the electric heating rod can be inserted into the housing and contact the partition. The electric heating rod is detachably and sealed to the connection port via a flange connection structure.

[0011] Optionally, the outer wall of the housing is provided with a heat insulation layer.

[0012] Optionally, the number of partitions is even, and the shell is vertically distributed; The connection port is located at the upper end of the housing, the air intake pipe and the exhaust pipe are located at the lower end of the housing, and a bracket is connected to the lower part of the housing.

[0013] The compressed air heating device provided in this application features a cylindrical electric heating rod located in the middle of the housing. The electric heating rod and the inner wall of the housing form an annular cavity. The annular cavity contains multiple partitions arranged in a ring and in contact with the electric heating rod. These partitions divide the annular cavity into multiple independent heating chambers. One partition has an inlet pipe and an outlet pipe connected to the heating chambers on either side of it. The remaining partitions have vents, with the vents of adjacent partitions located at opposite ends of the housing. During use, compressed air enters the housing through the inlet pipe and flows through each heating chamber sequentially, repeatedly circling back and forth along the housing axis. As the compressed air flows through each heating chamber, the electric heating rod heats the compressed air within that chamber. Compared to existing compressed air heating methods, this multiple circling within the housing increases the residence time of the compressed air. Even with a shortened housing length, the heating effect is still maintained after the compressed air flows through each heating chamber sequentially, thus reducing the length of the housing and the space it occupies. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the main structure of the compressed air heating device provided in the embodiments of this application; Figure 2 This is a top cross-sectional view of the compressed air heating device provided in the embodiments of this application; Figure 3 A partial cross-sectional view of the compressed air heating device provided in the embodiments of this application. Figure I ; Figure 4 A partial cross-sectional view of the compressed air heating device provided in the embodiments of this application. Figure II ; Figure 5 This is a partial front view cross-sectional structural schematic diagram of the compressed air heating device provided in the embodiments of this application; Figure 6 A partial three-dimensional structural diagram of the compressed air heating device provided in the embodiments of this application. Figure II ; Figure 7 This is a schematic diagram of the heat-conducting component structure of the compressed air heating device provided in the embodiments of this application.

[0016] Explanation of reference numerals in the attached drawings: 1. Shell; 2. Electric heating rod; 3. Partition plate; 4. Heating chamber; 5. Heating chamber I; 6. Heating chamber II; 7. Heating chamber III; 8. Inlet pipe; 9. Outlet pipe; 10. Vent; 11. Heat-conducting structure; 12. Heat-conducting component; 13. Arc-shaped pipe; 14. Heat-conducting sheet; 15. Connection port; 16. Flange connection structure; 17. Support. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0018] like Figures 1-7 As shown: An embodiment of the compressed air heating device provided in this application includes a housing 1, and a cylindrical electric heating rod 2 is provided in the middle of the housing 1. The electric heating rod 2 and the inner wall of the housing 1 form an annular cavity.

[0019] The annular cavity is provided with multiple partitions 3 arranged in a ring and in contact with the electric heating rod 2. The partitions 3 are sealed to the inner wall of the shell 1, and the multiple partitions 3 divide the annular cavity into multiple independent heating chambers 4. Specifically, the heating chamber 4 is formed between two adjacent partitions 3, the inner wall of the shell 1 and the outer wall of the electric heating rod 2.

[0020] One of the partitions 3 has heating chambers 4 on both sides connected to an air inlet pipe 5 and an air outlet pipe 6, respectively.

[0021] The remaining partitions 3 are all provided with vents 7, and the vents 7 of two adjacent partitions 3 are located at the two ends of the housing 1, respectively. Specifically, the vent 7 of one partition 3 is located at one end of the housing 1, and the vent 7 of the other partition 3 is located at the other end of the housing 1.

[0022] Furthermore, the heating chamber 4 connected to the air inlet pipe 5 is designated as heating chamber I 401, the heating chamber 4 connected to the air outlet pipe 6 is designated as heating chamber II 402, and the remaining heating chamber 4 is designated as heating chamber III 403. The vent 7 between heating chamber I 401 and its adjacent heating chamber III 403 is located at one end of heating chamber I 401, the air inlet pipe 5 is located at the other end of heating chamber I 401, the vent 7 between heating chamber II 402 and its adjacent heating chamber III 403 is located at one end of heating chamber II 402, and the air outlet pipe 6 is located at the other end of heating chamber II 402.

[0023] In this embodiment, a temperature sensor and an intelligent controller are also included. The temperature sensor is located inside the heating chamber II 402 and near the air outlet pipe 6. The intelligent controller is installed on the outer wall of the housing 1. Both the temperature sensor and the electric heating rod 2 are connected to the intelligent controller. The temperature sensor and the intelligent controller work together to automatically adjust the working state of the electric heating rod 2, so that the compressed air entering the air outlet pipe 6 reaches the preset temperature. The electric heating rod 2, temperature sensor, and intelligent controller in this embodiment, as well as the method of adjusting the working state of the electric heating rod 2 in conjunction with the temperature sensor and the intelligent controller, are all existing technologies known to those skilled in the art. They can be learned by those skilled in the art through technical manuals or conventional experimental methods. Furthermore, the above-mentioned electrical components are flexibly selected, installed, and the circuit is debugged by those skilled in the art to ensure that each device can operate normally. No further restrictions are imposed here.

[0024] In use, the air inlet pipe 5 is connected to the air compressor via the delivery pipe I, and the air outlet pipe 6 is connected to the abrasive sand blowing system via the delivery pipe II. The compressed air generated by the air compressor enters the heating chamber I 401 through the air inlet pipe 5. After flowing along the heating chamber I 401, the compressed air flows into the heating chamber III 403 adjacent to the heating chamber 4. Then, the compressed air flows through each heating chamber III 403 in sequence. Since in the two adjacent partitions 3 with vents 7, the vent 7 of one partition 3 is located at one end of the housing 1, and the vent 7 of the other partition 3 is located at the other end of the housing 1, and the vent 7 between the heating chamber I 401 and the adjacent heating chamber III 403 is located at one end of the heating chamber I 401, the air inlet pipe 5... The vent 7 between heating chamber I 401 and heating chamber II 402 and its adjacent heating chamber III 403 is located at one end of heating chamber II 402, and the air outlet 6 is located at the other end of heating chamber II 402. Therefore, the process of compressed air flowing through heating chamber I 401, heating chamber III 403 and heating chamber II 402 in sequence is the process of compressed air flowing back and forth in the housing 1. When the compressed air flows into heating chamber III 403 adjacent to heating chamber II 402, the compressed air flows along heating chamber III 403 adjacent to heating chamber II 402 and flows into heating chamber II 402. Then the compressed air flows along heating chamber II 402 and enters the conveying pipeline II from the air outlet 6. The conveying pipeline II delivers the compressed air to the abrasive sand blowing system.

[0025] As the compressed air flows sequentially along heating chamber I 401, heating chamber III 403 and heating chamber II 402, the electric heating rod 2 heats the compressed air.

[0026] The compressed air heating device of this application embodiment has a cylindrical electric heating rod 2 located in the middle of the housing 1. The electric heating rod 2 and the inner wall of the housing 1 form an annular cavity. The annular cavity is provided with multiple partitions 3 arranged in a ring and in contact with the electric heating rod 2. The multiple partitions 3 divide the annular cavity into multiple independent heating chambers 4. The heating chambers 4 on both sides of one partition 3 are respectively connected to an air inlet pipe 5 and an air outlet pipe 6. The remaining partitions 3 are all opened with air vents 7, and the air vents 7 of two adjacent partitions 3 are respectively located at the two ends of the housing 1. In use, the compressed air flows through each heating chamber 4 in sequence and flows back and forth multiple times along the axial direction of the housing 1. When the compressed air flows through each heating chamber 4, the electric heating rod 2 heats the compressed air in the heating chamber 4, thereby increasing the residence time of the compressed air in the housing 1. When the length of the housing 1 is shortened, the heating effect of the compressed air can still be guaranteed after the compressed air flows through each heating chamber 4 in sequence and is heated, thereby shortening the length of the housing 1 and reducing the space occupied by the housing 1.

[0027] In some embodiments of this application, the partition 3 is made of a thermally conductive material.

[0028] In this embodiment, the partition 3 is made of aluminum alloy, which gives the partition 3 good thermal conductivity. When the compressed air flows along the heating chamber 4, the compressed air comes into contact with the partition 3, and the partition 3 can heat the compressed air, thereby improving the heating effect of the compressed air.

[0029] In some embodiments of this application, the interior of the heating chamber 4 is provided with a heat-conducting structure 8 connected to the partition 3 and distributed along the axial direction of the housing 1, in order to further improve the heating effect of the compressed air.

[0030] In some embodiments of this application, the heat-conducting structure 8 includes a plurality of heat-conducting elements 801 distributed along the axial direction of the housing 1. Each heat-conducting element 801 includes a plurality of arc-shaped tubes 802 located on the same plane and distributed radially along the housing 1. A plurality of uniformly distributed heat-conducting sheets 803 are fixedly sleeved on the surface of the arc-shaped tubes 802, so that the heat-conducting sheets 803 are uniformly distributed in the heating cavity 4, thereby enabling uniform heating of the compressed air in the heating cavity 4.

[0031] Both the arc-shaped tube 802 and the heat-conducting plate 803 are made of thermally conductive materials. Specifically, both the arc-shaped tube 802 and the heat-conducting plate 803 are made of aluminum alloy.

[0032] In some embodiments of this application, one end of the housing 1 is provided with a connection port 9, and the electric heating rod 2 can be inserted into the housing 1 through the connection port 9 and contact the partition 3. The electric heating rod 2 is detachably and sealed to the connection port 9 through the flange connection structure 10, which facilitates the later maintenance or replacement of the electric heating rod 2.

[0033] In some embodiments of this application, an insulation layer is provided on the outer wall of the housing 1 to reduce heat loss inside the housing 1.

[0034] In some embodiments of this application, the number of partitions 3 is even, and the shell 1 is vertically distributed.

[0035] Connection port 9 is located at the upper end of housing 1 for easy installation and removal of electric heating rod 2. Inlet pipe 5 and exhaust pipe are located at the lower end of housing 1. Support bracket 11 is connected to the lower part of housing 1 for supporting housing 1.

[0036] In this embodiment, when the number of partitions 3 is even, the compressed air flow directions in heating chamber I 401 and heating chamber II 402 are opposite, that is, the air inlet pipe 5 and the exhaust pipe are located at the same end of the housing 1, and the housing 1 is vertically distributed, with the air inlet pipe 5 and the exhaust pipe located at the lower end of the housing 1, which facilitates the connection of the air inlet pipe 5 to the delivery pipeline I and the exhaust pipe to the delivery pipeline II.

[0037] In use, compressed air flows from bottom to top in heating chamber I 401. Then, the compressed air enters heating chamber III 403 adjacent to heating chamber 4 and flows from top to bottom along heating chamber III 403. Then, the compressed air enters the next heating chamber III 403 and flows from bottom to top. Since the number of partitions 3 is even, the number of heating chambers 4 is also even. That is, the flow direction of compressed air in heating chamber III 403 adjacent to heating chamber II 402 is the same as the flow direction in heating chamber I 401. Thus, the compressed air flows from top to bottom in heating chamber III 403 adjacent to heating chamber II 402. After entering heating chamber II 402 from heating chamber III 403 adjacent to heating chamber II 402, the compressed air flows from top to bottom. Thus, the compressed air can flow up and down multiple times within the housing 1.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A compressed air heating device, comprising a housing (1), characterized in that: A cylindrical electric heating rod (2) is provided in the middle of the shell (1), and the electric heating rod (2) and the inner wall of the shell (1) form an annular cavity; The annular cavity is provided with multiple partitions (3) arranged in a ring and in contact with the electric heating rod (2). The multiple partitions (3) divide the annular cavity into multiple independent heating chambers (4). One of the partitions (3) has an air inlet pipe (5) and an air outlet pipe (6) connected to the heating chambers (4) on both sides. The remaining partitions (3) all have vents (7), and the vents (7) of two adjacent partitions (3) are located at both ends of the shell (1).

2. The compressed air heating device according to claim 1, characterized in that: The partition (3) is made of thermally conductive material.

3. The compressed air heating device according to claim 2, characterized in that: The interior of the heating chamber (4) is provided with a heat-conducting structure (8) that is connected to the partition (3) and distributed along the axial direction of the shell (1).

4. The compressed air heating device according to claim 3, characterized in that: The heat-conducting structure (8) includes a plurality of heat-conducting elements (801) distributed along the axial direction of the shell (1). The heat-conducting elements (801) include a plurality of arc-shaped tubes (802) located in the same plane and distributed radially along the shell (1). The surface of the arc-shaped tubes (802) is covered with a plurality of uniformly distributed heat-conducting sheets (803). Both the arc-shaped tube (802) and the heat-conducting plate (803) are made of heat-conducting materials.

5. The compressed air heating device according to claim 1, characterized in that: One end of the housing (1) is provided with a connection port (9), and the electric heating rod (2) can be inserted into the housing (1) through the connection port (9) and contact the partition (3); The electric heating rod (2) is detachably and sealed to the connection port (9) through the flange connection structure (10).

6. The compressed air heating device according to claim 1, characterized in that: The outer wall of the shell (1) is provided with a heat insulation layer.

7. The compressed air heating device according to claim 5, characterized in that: The number of partitions (3) is even, and the shells (1) are vertically distributed; The connection port (9) is located at the upper end of the housing (1), the air inlet pipe (5) and the exhaust pipe are located at the lower end of the housing (1), and the lower part of the housing (1) is connected to a bracket (11).

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