Hot air duct structure and explosion-proof air heating unit

Abstract

This utility model relates to the technical field of explosion-proof air heating units, and discloses a hot air duct structure and an explosion-proof air heating unit, including an installation component for installing the duct. The installation component includes a duct body, flanges, limiting blocks, snap-fit ​​blocks, and abutment plates. The flanges are symmetrically arranged and fixedly connected to the corresponding duct body. The limiting blocks are arranged around the flanges and snap-fit ​​blocks are engaged with the flanges. The abutment plates abut against the flanges, and the snap-fit ​​blocks are elastically connected to the limiting blocks. Through the cooperation of the internal components of the installation component, after the flanges are aligned, the position between the flanges is first limited by the cooperation of the limiting blocks and snap-fit ​​blocks, and the abutment plates are in close contact with the corresponding flanges and kept in a taut state. While connecting the flanges, it avoids gaps caused by fasteners and vibrations during unit operation, which could lead to loosening and displacement of the flanges and affect the connection of the duct.

Description

Technical Field

[0001] This utility model belongs to the technical field of explosion-proof air heating units, specifically, it relates to a hot air duct structure and an explosion-proof air heating unit. Background Technology

[0002] Air heating units, also known as mine thermal collectors, are widely used as heating equipment in industrial and mining enterprises. They are electric heating devices that primarily heat gas streams. The heating element is a stainless steel electric heating tube, and the heater's inner cavity has multiple baffles to prolong the gas's residence time, ensuring thorough and uniform heating and improving heat exchange efficiency. The heated air is then delivered to the wellhead or indoors.

[0003] A document with publication number (CN217685876U) discloses an explosion-proof self-controlled air heating unit, including a base, a housing, and a slide frame. The housing is mounted on top of the base, and an installation box is installed inside the housing. A heating tube mechanism is installed inside the housing. The slide frame is symmetrically installed on the side of the heating tube mechanism near the air inlet. A disassembly frame is movably installed inside the air inlet. The device uses a drive slider fitted inside the slide frame. The drive slider moves inside the slide frame, driving a cleaning brush to reciprocate vertically. The cleaning brush contacts the heating wire and scrapes off the dust adhering to its surface, further improving the heating effect, ensuring the good performance of the heating tube mechanism, and reducing the labor intensity of the workers. When the explosion-proof axial flow fan stops, the controller automatically controls the electric control valve to open, preventing cold air from entering the explosion-proof axial flow fan and causing the heating tube mechanism to freeze and be damaged, thus improving the explosion-proof safety performance.

[0004] The hot air duct section of the aforementioned device has not been optimized in detail. The duct itself is connected by a flange structure, and most existing flange devices are connected by fasteners such as bolts. The size of the fasteners is smaller than the connection position. After long-term use, due to the continuous vibration of the device during operation, the flanges become loose and misaligned, which affects the connection between the ducts.

[0005] In view of this, this utility model is hereby proposed. Utility Model Content

[0006] To solve the technical problems of pipe connection, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A hot air duct structure includes an installation assembly for installing the duct. The installation assembly includes a duct body, flanges, limiting blocks, snap-fit ​​blocks, and abutment plates. The flanges are symmetrically arranged and fixedly connected to the corresponding duct body. The limiting blocks are arranged around the flanges and snap-fit ​​blocks are engaged with the flanges. The abutment plates abut against the flanges. The snap-fit ​​blocks are elastically connected to the limiting blocks.

[0008] In a preferred embodiment of the present invention, each flange is provided with a first slot around its perimeter, and a second slot is provided symmetrically within each first slot. A limiting block engages with the first slot, and a engaging block engages with the first slot.

[0009] In a preferred embodiment of the present invention, the limiting block is symmetrically provided with snap-fit ​​blocks, and the ends of the snap-fit ​​blocks are symmetrically provided with support rods. Each support rod is slidably connected to the corresponding snap-fit ​​block, and each support rod is fixedly connected to the limiting block. Each support rod is fitted with a first spring, and the end of each first spring is fixedly connected to the corresponding limiting block and snap-fit ​​block respectively.

[0010] In a preferred embodiment of this utility model, each of the limiting blocks is rotatably connected to a rotating shaft, and a pull rope is wound around the rotating shaft in opposite directions. The pull rope is fixedly connected to a connecting block, and the connecting block is fixedly connected to an abutment plate. The abutment plate is slidably connected to the limiting block, and limiting rods are symmetrically arranged on the abutment plate. Each limiting rod is fixedly connected to the abutment plate. A connecting hole is opened on the flange, and the limiting rod is inserted into the corresponding connecting hole.

[0011] In a preferred embodiment of this utility model, each of the rotating shafts is fixedly connected to a follower block, each follower block abuts against a stop block, each stop block is symmetrically provided with a slide rod, each slide rod is fixedly connected to the stop block, and each slide rod is slidably connected to a support block.

[0012] In a preferred embodiment of the present invention, each of the support blocks is fixedly connected to a corresponding limiting block, and each slide rod is fitted with a second spring, the end of each second spring being fixedly connected to a corresponding abutment block and support block respectively.

[0013] In a preferred embodiment of this utility model, each of the flanges is provided with an annular groove, and a sealing gasket is engaged between the annular grooves of the flanges.

[0014] An explosion-proof air heating unit includes a unit in which all of the above-mentioned hot air duct structures are installed.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. This hot air duct structure and explosion-proof air heating unit, through the cooperation of the internal components of the installation assembly, after the flanges are aligned, the position between the flanges is first restricted by the cooperation of the limiting block and the snap-fit ​​block, so that the abutment plate is in close contact with the corresponding flange and kept in a tight state. While connecting the flanges, it avoids the gaps caused by fasteners and the vibration during the operation of the unit, which would cause the flanges to loosen and shift, thus affecting the connection of the pipeline.

[0017] 2. This hot air duct structure and explosion-proof air heating unit, with the cooperation of the limiting rod and the connecting hole, forms a two-stage limit for the connection between flanges, preventing arbitrary movement of the flanges. The abutment plate restricts the limiting block and the snap-fit ​​block on the flange, and the assembly is completed quickly by rotation. During the rotation of the shaft, the follower block is driven and continuously presses down on the abutment block. The abutment block compresses the second spring, which deforms and applies the deformation force to the abutment block. After the shaft rotates to the appropriate position, the abutment block and the follower block snap-fit ​​and limit the connection, ensuring that the abutment plate and the flange are always kept in a taut state, i.e., the connection is stable.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] In the attached diagram:

[0020] Figure 1 This is a three-dimensional schematic diagram of the hot air duct of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure on the flange of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure on the limiting block of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure between the abutment plates of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure between the flanges of this utility model;

[0025] Figure 6 This is a three-dimensional schematic diagram of the unit of this utility model.

[0026] In the diagram: 1. Unit; 2. Pipeline body; 21. Flange; 22. First slot; 23. Second slot; 24. Connection hole; 25. Sealing gasket; 3. Limiting block; 31. Support rod; 32. First spring; 33. Snap-fit ​​block; 4. Abutment plate; 41. Limiting rod; 42. Connecting block; 43. Pull rope; 44. Rotating shaft; 5. Follower block; 6. Abutment block; 61. Slide rod; 62. Second spring; 63. Support block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0028] Please see Figure 1-5 A hot air duct structure includes an installation assembly for installing the duct. The installation assembly includes a duct body 2, flanges 21, limiting blocks 3, snap-fit ​​blocks 33, and abutment plates 4. The flanges 21 are symmetrically arranged and fixedly connected to the corresponding duct body 2. The limiting blocks 3 are arranged around the flanges 21 and snap-fit ​​blocks 33 are engaged with the flanges 21. The abutment plates 4 abut against the flanges 21. The snap-fit ​​blocks 33 are elastically connected to the limiting blocks 3. Through the cooperation of the internal components of the installation assembly, after the flanges 21 are aligned, the positions of the flanges 21 are limited by the cooperation of the limiting blocks 3 and snap-fit ​​blocks 33. The abutment plates 4 are in close contact with the corresponding flanges 21 and kept in a taut state. While connecting the flanges 21, gaps caused by fasteners and vibrations during the operation of the unit 1 are avoided, which could lead to loosening and displacement of the flanges 21 and affect the connection of the duct.

[0029] Each flange 21 has a first slot 22 circumferentially arranged around it, and each first slot 22 has a second slot 23 symmetrically arranged within it. A limiting block 3 engages with the first slot 22, and a locking block 33 engages with the first slot 22. Locking blocks 33 are symmetrically arranged on the limiting block 3, and support rods 31 are symmetrically arranged at the ends of the locking blocks 33. Each support rod 31 is slidably connected to a corresponding locking block 33, and each support rod 31 is fixedly connected to the limiting block 3. A first spring 32 is sleeved on each support rod 31, and the end of each first spring 32 is fixedly connected to the corresponding limiting block 3 and locking block 33. After aligning the flanges 21, the limiting blocks 3... The snap-fit ​​block 33 is inserted into the first snap-fit ​​groove 22. The snap-fit ​​block 33 first contacts the inner wall of the first snap-fit ​​groove 22. During the contact, the snap-fit ​​block 33 is pushed inward and compresses the first spring 32. The first spring 32 deforms and, after the snap-fit ​​block 33 moves to the position of the second snap-fit ​​groove 23, it is pushed into the second snap-fit ​​groove 23 by the deformation force. Through the snap-fit ​​of the limiting block 3, the snap-fit ​​block 33 and the first snap-fit ​​groove 22 and the second snap-fit ​​groove 23 respectively, the position between the flanges 21 is limited, so as to prevent the flanges 21 from loosening due to the vibration of the unit 1 and the gap caused by the fastener connection method after the subsequent installation is completed, thus ensuring the connection stability of this device.

[0030] Each limiting block 3 is rotatably connected to a rotating shaft 44, with a pull rope 43 wound around the rotating shaft 44 in opposite directions. The pull rope 43 is fixedly connected to a connecting block 42, and the connecting block 42 is fixedly connected to an abutment plate 4. The abutment plate 4 is slidably connected to the limiting block 3, and a limiting rod 41 is symmetrically arranged on the abutment plate 4. Each limiting rod 41 is fixedly connected to the abutment plate 4. A connecting hole 24 is opened on the flange 21, and the limiting rod 41 is inserted into the corresponding connecting hole 24. Each rotating shaft 44 is fixedly connected to... There are follower blocks 5, each follower block 5 abutting against abutting block 6. Each abutting block 6 is symmetrically provided with a sliding rod 61, each sliding rod 61 is fixedly connected to the abutting block 6, each sliding rod 61 is slidably connected to a support block 63, each support block 63 is fixedly connected to a corresponding limiting block 3, and each sliding rod 61 is fitted with a second spring 62. The end of each second spring 62 is fixedly connected to the corresponding abutting block 6 and support block 63 respectively. The rotating shaft 44 is manually rotated, and the rotating shaft 44 winds... The pull rope 43 pulls the connecting block 42 and the abutment plate 4 to move. The abutment plate 4 drives the limiting rod 41 to align with the connecting hole 24 and insert it. The rotating shaft 44 continues to rotate, continuously tightening the abutment plate 4. Through the tight contact and tension between the abutment plate 4 and the flange 21, the flanges 21 are connected. The cooperation between the limiting rod 41 and the connecting hole 24 forms a secondary limit on the connection between the flanges 21, preventing the flanges 21 from moving arbitrarily. The abutment plate 4 also limits the movement of the connecting block 42. 3. The snap-fit ​​block 33 is restrained on the flange 21 and the assembly is completed quickly by rotation. As the rotating shaft 44 rotates, the follower block 5 is driven and continuously presses down on the abutment block 6. The abutment block 6 compresses the second spring 62, which deforms and applies the deformation force to the abutment block 6. After the rotating shaft 44 rotates to the appropriate position, the abutment block 6 and the follower block 5 are snapped together and limited, ensuring that the abutment plate 4 and the flange 21 are always kept in a tight state, that is, the connection is stable.

[0031] Each flange 21 has an annular groove, and a gasket 25 is snapped between the annular grooves of the flange 21. Before the flange 21 is assembled, the gasket 25 is installed in the corresponding annular groove to ensure the sealing between the flanges 21.

[0032] An explosion-proof air heating unit includes a unit 1, in which all the aforementioned hot air duct structures are installed. Through the cooperation of the internal components of the installation assembly, after the flanges 21 are aligned, the positions between the flanges 21 are first restricted by the cooperation of the limiting block 3 and the snap-fit ​​block 33. The abutment plate 4 is in close contact with the corresponding flange 21 and kept in a taut state. While connecting the flanges 21, the gaps caused by fasteners and the vibration of the unit 1 during operation are avoided, which would cause the flanges 21 to loosen or shift, thus affecting the connection of the pipeline.

[0033] It is worth noting that Unit 1 includes a base, a housing, and a slide frame. The housing is mounted on the top of the base, and an installation box is mounted inside the housing. A heating tube mechanism is mounted inside the housing. The slide frame is symmetrically mounted on the side of the heating tube mechanism near the air inlet. A disassembly frame is movably mounted inside the air inlet. The above device uses a drive slider fitted inside the slide frame. The drive slider moves inside the slide frame, causing the cleaning brush to reciprocate vertically. The cleaning brush contacts the heating wire and scrapes off the dust attached to its surface, further improving the heating effect, ensuring the good performance of the heating tube mechanism, and reducing the labor intensity of the workers. When the explosion-proof axial flow fan stops, the controller automatically controls the electric control valve to open, preventing cold air from entering the explosion-proof axial flow fan and causing the heating tube mechanism to freeze and be damaged, thus improving the explosion-proof safety performance. Unit 1 has already been disclosed in the prior art of an explosion-proof self-controlled air heating unit CN217685876U, and will not be described in detail here.

[0034] Working principle: Through the cooperation of the internal components of the installation assembly, after the flanges 21 are aligned, the position between the flanges 21 is first restricted by the cooperation of the limiting block 3 and the snap-fit ​​block 33. The abutment plate 4 is tightly contacted with the corresponding flange 21 and kept in a taut state. While connecting the flanges 21, it avoids the gaps caused by fasteners and the vibration of the unit 1 during operation, which could lead to loosening and displacement of the flanges 21 and affect the pipeline connection. After aligning the flanges 21, the limiting block 3 and the snap-fit ​​block 33 are sent into the first slot 22. The snap-fit ​​block 33 first engages with the first slot 22. The inner wall of the groove 22 contacts the first spring 32. During contact, the locking block 33 is pushed inward and compresses the first spring 32, causing the first spring 32 to deform. After the locking block 33 moves to the position of the second groove 23, the deformation force pushes the locking block 33 into the second groove 23 for locking. Through the locking of the limiting block 3, the locking block 33, and the first and second grooves 22 respectively, the position of the flanges 21 is restricted, preventing the flanges 21 from loosening due to vibrations from the operation of the unit 1 and gaps caused by the fastener connection method after subsequent installation, thus ensuring the connection stability of this device. The shaft 44 is manually rotated, and the pull rope 43 is wound around it. The pull rope 43 pulls the connecting block 42 and the abutment plate 4 to move. The abutment plate 4 drives the limiting rod 41 to align with the connecting hole 24 and insert it. The shaft 44 continues to rotate, and the shaft 44 continuously tightens the abutment plate 4. Through the tight contact and tension between the abutment plate 4 and the flange 21, the flanges 21 are connected. The cooperation between the limiting rod 41 and the connecting hole 24 forms a secondary limit on the connection between the flanges 21, preventing the flanges 21 from moving arbitrarily. The abutment plate 4 also restricts the limiting block 3 and the snap-fit ​​block 33 to the flange 21. Assembly is completed quickly by rotation. As the rotating shaft 44 rotates, the follower block 5 is driven and continuously presses down on the abutment block 6. The abutment block 6 compresses the second spring 62, which deforms and applies the deformation force to the abutment block 6. After the rotating shaft 44 rotates to the appropriate position, the abutment block 6 and the follower block 5 are locked together to ensure that the abutment plate 4 and the flange 21 are always kept in a taut state, that is, the connection is stable. Before the flange 21 is assembled, the sealing gasket 25 is installed in the corresponding annular groove to ensure the sealing between the flanges 21.

[0035] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A hot air duct structure, characterized in that, include: The installation assembly is used to install pipes. The installation assembly includes a pipe body (2), a flange (21), a limiting block (3), a snap-fit ​​block (33), and an abutment plate (4). The flanges (21) are symmetrically arranged and fixedly connected to the corresponding pipe body (2). The limiting block (3) is arranged around the flange (21) and snaps the limiting block (3) and the snap-fit ​​block (33) to the flange (21). The abutment plate (4) abuts against the flange (21). The snap-fit ​​block (33) is elastically connected to the limiting block (3).

2. The hot air duct structure according to claim 1, characterized in that, Each flange (21) is provided with a first slot (22) around its perimeter, and a second slot (23) is provided symmetrically within each first slot (22). A limiting block (3) engages with the first slot (22), and a engaging block (33) engages with the first slot (22).

3. The hot air duct structure according to claim 2, characterized in that, The limiting block (3) is symmetrically provided with snap-fit ​​blocks (33), and the ends of the snap-fit ​​blocks (33) are symmetrically provided with support rods (31). Each support rod (31) is slidably connected to the corresponding snap-fit ​​block (33), and each support rod (31) is fixedly connected to the limiting block (3). Each support rod (31) is fitted with a first spring (32), and the end of each first spring (32) is fixedly connected to the corresponding limiting block (3) and snap-fit ​​block (33).

4. The hot air duct structure according to claim 1, characterized in that, Each of the limiting blocks (3) is rotatably connected to a rotating shaft (44), and a pull rope (43) is wound around the rotating shaft (44) in opposite directions. The pull rope (43) is fixedly connected to a connecting block (42), and the connecting block (42) is fixedly connected to an abutment plate (4). The abutment plate (4) is slidably connected to the limiting block (3), and a limiting rod (41) is symmetrically arranged on the abutment plate (4). Each limiting rod (41) is fixedly connected to the abutment plate (4). A connecting hole (24) is opened on the flange (21), and the limiting rod (41) is inserted into the corresponding connecting hole (24).

5. The hot air duct structure according to claim 4, characterized in that, Each of the rotating shafts (44) is fixedly connected to a follower block (5), each follower block (5) abuts against a stop block (6), each stop block (6) is symmetrically provided with a slide rod (61), each slide rod (61) is fixedly connected to the stop block (6), and each slide rod (61) is slidably connected to a support block (63).

6. The hot air duct structure according to claim 5, characterized in that, Each of the support blocks (63) is fixedly connected to the corresponding limiting block (3), and each slide rod (61) is fitted with a second spring (62). The end of each second spring (62) is fixedly connected to the corresponding abutment block (6) and support block (63).

7. The hot air duct structure according to claim 1, characterized in that, Each of the flanges (21) is provided with an annular groove, and a sealing gasket (25) is snapped between the annular grooves of the flanges (21).

8. An explosion-proof air heating unit, comprising a unit (1), characterized in that, The unit (1) is equipped with a hot air duct structure as described in any one of claims 1-7.

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