Vertical multi-tube tubular furnace

Abstract

The invention relates to the technical field of tube furnaces, and discloses a vertical multi-tube tube furnace which comprises a furnace body, a plurality of furnace tubes, a lifting module and a furnace tube connecting module, the furnace body is provided with a hearth used for allowing the furnace tubes to be connected in an inserted mode, and the multiple furnace tubes are detachably installed on the furnace tube connecting module; the lifting module can be connected to the furnace body in an up-down sliding mode, the furnace tube connecting module is detachably connected to the lifting module, and when the lifting module vertically slides on the furnace body, the furnace tube can slide into or slide out of the hearth. The furnace tube can be conveniently taken and placed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tubular furnace, and particularly relates to a vertical multi-tube tubular furnace. BACKGROUND

[0002] The vertical multi-tube tubular furnace is a common device for heating, reaction, heat treatment and the like in the fields of chemical industry, materials and the like, has multiple furnace tubes and has higher efficiency. After reaction is completed, the conventional vertical tubular furnace needs to wait until the hearth temperature is a certain temperature, and then an operator can open the hearth to take out the furnace tubes one by one from the high-temperature hearth to take out the treated materials or replace new furnace tubes.

[0003] Since the furnace tubes are multiple, the worker takes out the furnace tubes slowly and laboriously, and the temperature of the furnace body shell is too high, which not only leads to a poor working environment, but also has safety hazards such as scalding in the process of taking and placing the furnace tubes. Therefore, the multi-tube tubular furnace still has room for improvement. SUMMARY

[0004] In order to facilitate the taking and placing of the furnace tubes, the present application provides a vertical multi-tube tubular furnace.

[0005] The present application adopts the following technical solution: A vertical multi-tube tubular furnace comprises a furnace body, multiple furnace tubes, a lifting module and a furnace tube connecting module. The furnace body is provided with a hearth for inserting the furnace tubes. The multiple furnace tubes are detachably installed on the furnace tube connecting module. The lifting module is connected to the furnace body in a vertically sliding manner. The furnace tube connecting module is detachably connected to the lifting module. When the lifting module vertically slides on the furnace body, the furnace tubes can slide into or out of the hearth.

[0006] By adopting the above technical solution, the furnace tubes are installed on the furnace tube connecting module, and the furnace tube connecting module is installed on the lifting module. When the furnace tubes are placed, the furnace tubes are first installed on the furnace tube connecting module, and then the furnace tube connecting module is installed on the lifting module. Then, the lifting module is hoisted on the furnace body by a hoisting device, and the furnace tubes are one-to-one inserted into the opposite hearths. When the furnace tubes are removed, the lifting module is hoisted out, and all the furnace tubes can be taken out from the furnace body at the same time, so that the overall operation is convenient and the risk of being scalded by the furnace body is reduced.

[0007] Optionally, the lifting module comprises a hoisting frame and limiting rods arranged on both sides of the hoisting frame. When the lifting module slides on the furnace body, the limiting rods abut against both sides of the furnace body.

[0008] By adopting the above technical solution, the limiting rods abut against both sides of the furnace body, so that the hoisting frame can be guided when the lifting module slides, and the furnace tubes can be one-to-one corresponding to the hearths.

[0009] Optionally, the hoisting frame is provided with two sets of support rods, which are used to support the furnace tube connection module. The furnace tube connection module includes a first support plate, a second support plate, and an exhaust manifold. The first support plate is located below the second support plate, and the support rod is connected to the lower surface of the first support plate. A locking member is provided between the first support plate and the support rod to restrict the sliding of the first support plate on the support rod. A first through hole is provided on the first support plate, and a second through hole is provided on the second support plate. The furnace tube passes through the first through hole and the second through hole. A support ring is provided on the outer wall of the furnace tube. The support ring can abut against the surface of the first support plate. A connecting component is provided on the second support ring. The connecting component and the second support plate are detachably connected, and the exhaust manifold is connected to the connecting component.

[0010] By adopting the above technical solution, the furnace tube connection module is supported by a support rod and positioned by a locking component, making it difficult for the furnace tube connection module to slide freely on the hoisting frame. After the furnace tube passes through the first and second through holes, the support ring abuts against the first support plate to support the furnace tube. The upper end of the furnace tube is connected to the second support plate through a connecting component, thereby positioning the furnace tube in the furnace tube connection module.

[0011] Optionally, the connecting assembly includes a base connected to the second support plate and an adjusting seat rotatably mounted on the mounting base. The exhaust manifold is provided with a connector, which is connected to the adjusting seat. The adjusting seat is provided with a locking rod, and the connector has a through hole through which the locking rod passes. A locking block is threaded onto the locking rod, and the locking block can abut against the surface of the connector. The connector has a clearance groove communicating with the through hole, and the clearance groove is larger than the locking block. Rotating the adjusting seat allows the locking rod to enter the clearance groove, so that the connector can disengage upwards.

[0012] By adopting the above technical solution, the locking block is threaded to the locking rod and abuts against the surface of the connector, thereby positioning the connector on the adjusting seat. Loosen the locking block and then rotate the adjusting seat so that the locking block corresponds to the clearance groove, so that the connector can be lifted up to separate from the adjusting seat.

[0013] Optionally, an angle plate is installed on the second support plate. The angle plate includes a horizontal part connected to the second support plate and a vertical part for connecting to the base. A waist-shaped groove is provided on the vertical part, and a clamping member is connected to the vertical part. The clamping member can pass through the waist-shaped groove and be threaded to the base, and one end of the clamping member can abut against the surface of the vertical part. A stepped edge is provided in the adjusting seat, and the upper end of the furnace tube abuts against the stepped edge.

[0014] By adopting the above technical solution, the base is connected to the vertical part through the clamping part, and the vertical position of the base can be adjusted so that the upper end of the furnace tube is pressed against the edge of the step, thereby improving the connection and sealing between the furnace tube and the adjusting seat.

[0015] Optionally, a limiting groove is formed on the surface of the vertical part, and a limiting block is provided in the limiting groove. The abutting member includes an abutting block that can abut against the surface of the vertical part and an abutting rod provided on the abutting block. A threaded hole is provided on the base for threaded connection of the abutting rod. A check rod is slidably provided in the abutting block, and a trigger rod is slidably connected to part of the locking rod. When the locking block abuts against the connector, the trigger rod can drive the check rod to slide and abut against the limiting block.

[0016] By adopting the above technical solution, when the trigger rod drives the anti-reverse rod to press against the limit block, it can restrict the reverse rotation of the pressing block, thereby improving the connection stability between the pressing part and the base.

[0017] Optionally, the clamping block has an installation cavity, in which a sliding plate is slidably connected. The anti-reverse rod is disposed on the sliding plate, and a first elastic element is disposed on the outer wall of the anti-reverse rod. An extension rod is disposed on the sliding plate, and the extension rod slides out from the clamping rod. A slot is disposed on the upper surface of the base, and the slot is connected to the threaded hole. When the locking block is clamped against the connector, the trigger rod can be inserted into the threaded hole and drive the clamping rod to slide away from the clamping block. The first elastic element is compressed, and the anti-reverse rod is clamped against the limiting block.

[0018] By adopting the above technical solution, the trigger rod is inserted into the slot and can drive the extension rod to slide, so that the anti-reverse rod abuts against the limit block, thereby achieving the effect of strengthening the positioning of the abutment block.

[0019] Optionally, the end of the extension rod extending beyond the end of the abutting rod is provided with an abutting ball, and the lower end of the trigger rod is provided with an inclined surface, so that the extension rod can be pushed to slide through the inclined surface during the downward sliding of the trigger rod.

[0020] By adopting the above technical solution, the extension rod can be pushed to slide by the inclined surface abutting against the contact ball.

[0021] Optionally, the trigger rod slides through the locking rod, and a second elastic element is provided between the locking rod and the trigger; a pushing post is provided on the locking block on the locking rod, and when the locking block abuts against the connector, the pushing post can push the trigger rod to slide downward, and the second elastic element provides an upward reset force for the trigger rod.

[0022] By adopting the above technical solution, the trigger rod slides through the locking rod, and can be pushed to slide while the locking block is pressed against the connector.

[0023] In summary, this application includes at least one of the following beneficial effects: 1. Multiple furnace tubes are integrated and installed on the furnace tube connection module. The lifting module can lift and lower multiple furnace tubes simultaneously and smoothly and quickly, which greatly improves the operating efficiency and reduces the risk of manual operation at high temperatures. Multiple furnace tubes can be picked up and put down at the same time without waiting for the furnace body to cool down completely, which significantly reduces the production interval time and improves equipment utilization and production efficiency. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a schematic diagram of the lifting module in an embodiment of this application; Figure 3 This is a schematic diagram of the furnace tube connection module in an embodiment of this application; Figure 4 This is a schematic diagram of the connection between the connecting component and the exhaust manifold in an embodiment of this application; Figure 5 This is a cross-sectional schematic diagram of the connecting component in an embodiment of this application; Figure 6 This is a schematic diagram illustrating the trigger lever in an embodiment of this application; Figure 7 This is a schematic diagram of the clamping element in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Furnace body; 2. Furnace tube; 3. Lifting module; 31. Lifting frame; 32. Limiting rod; 4. Furnace tube connection module; 41. First support plate; 42. Second support plate; 43. Exhaust main pipe; 5. Second elastic element; 6. Support rod; 9. Support ring; 10. Connecting assembly; 101. Base; 102. Adjusting seat; 11. Connector; 12. Locking rod; 13. Through hole; 14. Locking block; 15. Clearance groove; 16. Angle Plate; 161. Horizontal section; 162. Vertical section; 17. Waist-shaped groove; 18. Clamping element; 181. Clamping block; 182. Clamping rod; 19. Step edge; 20. Limiting block; 21. Limiting groove; 22. Threaded hole; 23. Anti-reverse rod; 24. Mounting cavity; 25. Slide plate; 26. First elastic element; 27. Extension rod; 28. Slot; 29. ​​Abutting ball; 30. Inclined surface; 33. Cooling fan; 34. Audible and visual alarm; 35. Push column. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] This application discloses a vertical multi-tube furnace. (Refer to...) Figure 1 and Figure 2 The tubular furnace includes a furnace body 1, multiple furnace tubes 2, a lifting module 3 that can slide up and down on the furnace body 1, and a furnace tube connection module 4. The furnace body 1 has multiple furnace chambers, and the furnace tubes 2 are inserted into the corresponding chambers. A cooling fan 33 and an audible and visual alarm 34 are also installed on the upper outer shell of the furnace body 1 to further enhance heat dissipation and safety warning functions. The specific structure of the furnace body 1 is prior art and not an improvement of this application, and will not be described in detail here.

[0028] Reference Figure 1 and Figure 2 The lifting module 3 includes a hoisting frame 31 and limiting rods 32 installed on both sides of the hoisting frame 31. The limiting rods 32 are symmetrically arranged to form a U-shaped structure. A space for accommodating the furnace body 1 is formed between the two sets of limiting rods 32. When the lifting module 3 is hoisted onto the furnace body 1, the limiting rods 32 abut against both sides of the furnace body 1, thereby positioning the lifting module 3 and preventing it from swaying easily. Multiple furnace tubes 2 are installed on the furnace tube connecting module 4, and the furnace tube connecting module 4 is installed on the lifting module 3. Therefore, after connecting the furnace tube connecting module 4 and the lifting module 3, the lifting module 3 is hoisted onto the furnace body 1, and the furnace tubes 2 can be inserted into the furnace chamber accordingly. In this embodiment, the furnace chamber has two rows, and the number of furnace tubes 2 corresponds one-to-one with the number of furnace chambers.

[0029] Reference Figure 2 and Figure 3 Two sets of support rods 6 are installed on the hoisting frame to support the furnace tube connection module 4. The furnace tube connection module 4 includes a first support plate 41, a second support plate 42, and an exhaust manifold 43. The first support plate 41 and the second support plate 42 are horizontally arranged, with the first support plate 41 located below the second support plate 42. The first support plate 41 and the second support plate 42 are connected by profiles. When the furnace tube connection module 4 is connected to the hoisting frame, both ends of the first support plate 41 abut against the support rods 6. The support rods 6 and the first support plate 41 can also be equipped with locking components, such as pins, which pass through the first support plate 41 and are inserted into the support rods 6, thus preventing the furnace tube connection module 4 from sliding freely after being connected to the hoisting frame. In other embodiments, the locking components can also be bolts or any other components that can position the first support plate 41 on the support rods 6.

[0030] A first through hole is provided on the first support plate 41, and a second through hole is provided on the second support plate 42. When the furnace tube 2 is installed on the furnace tube connecting module 4, the furnace tube 2 passes through the first and second through holes from top to bottom. A support ring 9 is fixed to the outer wall of the furnace tube 2. The outer diameter of the support ring 9 is smaller than the inner diameter of the second through hole, and the support ring 9 can abut against the surface of the first support plate 41. A connecting component 10 is also installed on the second support plate 42. The upper end of the furnace tube 2 is positioned by the connecting component 10, and the exhaust manifold 43 is connected to the upper end of the furnace tube 2 through the connecting component 10. In this embodiment, there are two exhaust manifolds 43, and the exhaust manifolds 43 connect the furnace tubes 2 in the same column respectively.

[0031] Reference Figure 4 and Figure 5 The connecting assembly 10 includes a base 101 mounted on the second support plate 42 and an adjusting seat 102 rotatably mounted on the base 101. The adjusting seat 102 is rotatably connected to the upper end of the base 101 via bearings or other means. Multiple connectors 11 are provided on the exhaust manifold 43, each connector 11 corresponding to a furnace tube 2, and each connector 11 is connected to an adjacent adjusting seat 102. Figure 6 A locking rod 12 is fixed to the upper end of the adjusting seat 102. A through hole 13 is provided on the connector 11, through which the locking rod 12 passes. A locking block 14 is threaded onto the locking rod 12. The locking block 14 can abut against the surface of the connector 11, thereby connecting the connector 11 to the adjusting seat 102. Multiple locking rods 12 are evenly arranged along the circumferential direction of the adjusting seat 102, such as six or eight, to improve the stability of the connector 11 connection. A relief groove 15 is provided on the connector 11, communicating with the through hole 13. The relief groove 15 corresponds one-to-one with the through hole 13, and the size of the relief groove 15 is slightly larger than the size of the locking block 14. When the exhaust manifold 43 needs to be rewritten, rotate the locking block 14 to separate the locking block 14 from the connector 11, and then rotate the adjusting seat 102 to move the locking rod 12 into the relief groove 15. After all the adjusting seats 102 in the same row have rotated, the connector 11 can be separated from the adjusting seat 102 upwards.

[0032] Reference Figure 3 , Figure 6 and Figure 7 Angle plates 16 are mounted on the support plate. Angle plates 16 include a horizontal portion 161 and a vertical portion 162, which are perpendicular to each other. The horizontal portion 161 is mounted to the second support plate 42 by bolts or other means. A clamping member 18 is mounted on the vertical portion 162 and is connected to the base 101. Two angle plates 16 are symmetrically distributed on both sides of each base 101, and the bases 101 are connected via the angle plates 16. When the base 101 is mounted on the second support plate 42, there is a certain gap between the base 101 and the surface of the second support plate 42.

[0033] A waist-shaped groove 17 is provided on the vertical part 162, and a clamping member 18 passes through the waist-shaped groove 17 and is connected to the base 101. The vertical height of the base 101 can be adjusted by adjusting the position of the clamping member 18. A stepped edge 19 is provided on the inner wall of the adjusting seat 102. The furnace tube 2 passes through the adjusting seat 102, and the upper end of the furnace tube 2 abuts against the stepped edge 19. Then, the base 101 is positioned by the clamping member 18, so that the furnace tube 2 is pressed against the stepped edge 19.

[0034] The base 101 has a threaded hole 22. The clamping member 18 includes a clamping block 181 and a clamping rod 182 connected to the clamping block 181. The clamping rod 182 passes through the waist-shaped groove 17 and is threaded into the threaded hole 22. The clamping block 181 is clamped against the vertical part 162, and the side wall of the base 101 abuts against the surface of the vertical part 162. The base 101 is positioned by two corner plates 16. Furthermore, the vertical part 162 has limit grooves 21 on both sides of the waist-shaped groove 17. The limit grooves 21 extend in the vertical direction, and limit blocks 20 are installed in the limit grooves 21. Multiple limit blocks 20 are evenly arranged in the vertical direction. The limiting block 20 has an inclined surface. Taking the view in the figure as an example, the inclined surface of the limiting block 20 on the left side of the waist-shaped groove 17 is inclined to the inside of the limiting groove 21, so that the thickness of the limiting block 20 gradually decreases. The inclined surface of the limiting block 20 on the right side of the waist-shaped groove 17 is inclined to the opening direction of the limiting groove 21, so that the thickness of the limiting block 20 gradually increases.

[0035] Two anti-reverse rods 23 are installed in the clamping block 181, and a trigger rod is installed on part of the locking rod 12. When the clamping block 181 rotates clockwise and abuts against the vertical part 162, the trigger rod can drive the anti-reverse rod 23 to slide and abut against the limit block 20. Under the action of the anti-reverse rod 23, the clamping block 181 is not easy to rotate in the opposite direction, thereby improving the positioning effect of the base 101.

[0036] Reference Figure 6 and Figure 7 An installation cavity 24 is provided in the clamping block 181, and a sliding plate 25 is slidably connected in the installation cavity 24. Two anti-reverse rods 23 are installed on the sliding plate 25. A first elastic element 26, which is a spring, is sleeved on the outer wall of the anti-reverse rod 23. One end of the spring is connected to the sliding plate 25, and the other end is connected to the inner wall of the installation cavity 24. An extension rod 27 is also fixed on the sliding plate 25. The extension rod 27 slides through the clamping rod 182 and extends into the threaded hole 22. A trigger rod can cooperate with the extension rod 27. The trigger rod drives the extension rod 27 to slide away from the clamping block 181, thereby causing the anti-reverse rod 23 to pass out of the clamping block 181 and press against the limiting block 20. At this time, the first elastic element 26 is compressed.

[0037] Reference Figure 6 andFigure 7 The locking rod 12 has an internal hollow structure, and its lower end is connected to the lower end of the adjusting seat 102. A trigger rod slides through the locking rod 12, and a second elastic element 5, which is a spring, is installed between the trigger rod and the inner wall of the locking rod 12. A receiving space is provided inside the locking rod 12 to accommodate the spring. A push post 35 is coaxially fixed to the inner cavity of the locking block 14. When the locking block 14 is threaded onto the locking rod 12, the push post 35 inserts into the locking rod 12 and pushes the trigger rod downwards, compressing the second elastic element 5. A slot 28 is provided on the base 101, which communicates with the threaded hole 22. The trigger rod slides downwards through the adjusting seat 102 and inserts into the slot 28.

[0038] An abutment ball 29 is mounted on one end of the extension rod 27 at the threaded hole 22. The portion connecting the extension rod 27 and the abutment ball 29 has a smaller diameter. The lower end of the trigger rod has an inclined surface 30, and a slot is formed at the lower end of the trigger rod to allow the smaller diameter portion of the extension rod 27 to pass through. When the trigger rod moves downward, the inclined surface 30 abuts against the abutment ball 29, thereby pushing the extension rod 27 to slide, which in turn drives the anti-reverse rod 23 to move. When the locking block 14 moves upward, the second elastic element 5 drives the trigger rod to move upward and disengage from the slot 28.

[0039] The implementation principle of a vertical multi-tube furnace according to an embodiment of this application is as follows: the furnace tube 2 is first installed on the furnace tube connecting module 4, and then the furnace tube connecting module 4 is connected to the lifting module 3. The furnace tube connecting module 4 is limited by means of pins, etc., so that the lifting module 3 can be hoisted onto the furnace body 1, and the furnace tubes 2 are inserted one by one into the furnace chamber. When the furnace tube 2 needs to be removed from the furnace body 1, the entire lifting module 3 can be hoisted out.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vertical multi-tube furnace, characterized in that: The furnace includes a furnace body (1), multiple furnace tubes (2), a lifting module (3), and a furnace tube connection module (4). The furnace body (1) has a furnace chamber for inserting the furnace tubes (2). Multiple furnace tubes (2) are detachably installed on the furnace tube connection module (4). The lifting module (3) can slide up and down on the furnace body (1), and the furnace tube connection module (4) is detachably connected to the lifting module (3). When the lifting module (3) slides vertically on the furnace body (1), the furnace tubes (2) can slide into or out of the furnace chamber.

2. A vertical multi-tube furnace according to claim 1, characterized in that: The lifting module (3) includes a hoisting frame and limiting rods (32) set on both sides of the hoisting frame. When the lifting module (3) slides on the furnace body (1), the limiting rods (32) abut against both sides of the furnace body (1).

3. A vertical multi-tube furnace according to claim 2, characterized in that: The hoisting frame is provided with two sets of support rods (6), which are used to support the furnace tube connection module (4); the furnace tube connection module (4) includes a first support plate (41), a second support plate (42), and an exhaust manifold (43). The first support plate (41) is located below the second support plate (42), and the support rods (6) are connected to the lower surface of the first support plate (41). A locking element is provided between the first support plate (41) and the support rods (6) to restrict the sliding of the first support plate (41) on the support rods (6); The first support plate (41) has a first through hole (13) and the second support plate (42) has a second through hole (13). The furnace tube (2) passes through the first through hole (13) and the second through hole (13). The outer wall of the furnace tube (2) is provided with a support ring (9). The support ring (9) can abut against the surface of the first support plate (41). The second support ring (9) is provided with a connecting component (10). The connecting component (10) and the second support plate (42) are detachably connected, and the exhaust manifold (43) is connected to the connecting component (10).

4. A vertical multi-tube furnace according to claim 3, characterized in that: The connecting assembly (10) includes a base (101) connected to the second support plate (42) and an adjusting seat (102) rotatably mounted on the mounting base. The exhaust manifold (43) is provided with a connector (11), which is connected to the adjusting seat (102). The adjusting seat (102) is provided with a locking rod (12), and the connector (11) is provided with a through hole (13). The locking rod (12) passes through the through hole (13). The locking rod (12) is threaded with a locking block (14), which can abut against the surface of the connector (11); the connector (11) is provided with a relief groove (15) communicating with the through hole (13), and the relief groove (15) is larger than the locking block (14); rotating the adjusting seat (102) can make the locking rod (12) enter the relief groove (15) so that the connector (11) can be disengaged upward.

5. A vertical multi-tube furnace according to claim 4, characterized in that: An angle plate (16) is installed on the second support plate (42). The angle plate (16) includes a horizontal part (161) connected to the second support plate (42) and a vertical part (162) for connecting to the base (101). A waist-shaped groove (17) is provided on the vertical part (162). A clamping member (18) is connected to the vertical part (162). The clamping member (18) can pass through the waist-shaped groove (17) and be threaded to the base (101). One end of the clamping member (18) can abut against the surface of the vertical part (162). A stepped edge (19) is provided in the adjusting seat (102). The upper end of the furnace tube (2) abuts against the stepped edge (19).

6. A vertical multi-tube furnace according to claim 5, characterized in that: The vertical part (162) has a limiting groove (21) on its surface, and a limiting block (20) is provided in the limiting groove (21). The abutting member (18) includes an abutting block (181) that can abut against the surface of the vertical part (162) and an abutting rod (182) provided on the abutting block (181). The base (101) has a threaded hole (22) for threaded connection of the abutting rod (182). A check rod (23) is slidably provided in the abutting block (181). A trigger rod is slidably connected to part of the locking rod (12). When the locking block (14) abuts against the connector (11), the trigger rod can drive the check rod (23) to slide and abut against the limiting block (20).

7. A vertical multi-tube furnace according to claim 6, characterized in that: The clamping block (181) has an installation cavity (24), and a sliding plate (25) is slidably connected in the installation cavity (24). The anti-reverse rod (23) is disposed on the sliding plate (25), and a first elastic element (26) is disposed on the outer wall of the anti-reverse rod (23). An extension rod (27) is disposed on the sliding plate (25), and the extension rod (27) slides out from the clamping rod (182). A slot (28) is disposed on the upper surface of the base (101), and the slot (28) is connected to the threaded hole (22). When the locking block (14) is pressed against the connector (11), the trigger rod can be inserted into the threaded hole (22) and drive the clamping rod (182) to slide away from the clamping block (181). The first elastic element (26) is compressed, and the anti-reverse rod (23) is pressed against the limiting block (20).

8. A vertical multi-tube furnace according to claim 7, characterized in that: The extension rod (27) has a contact ball (29) at one end that extends beyond the end of the clamping rod (182), and the lower end of the trigger rod has an inclined surface (30). During the downward sliding process of the trigger rod, the extension rod (27) can be pushed to slide through the inclined surface (30).

9. A vertical multi-tube furnace according to claim 8, characterized in that: The trigger rod slides through the locking rod (12), and a second elastic element (5) is provided between the locking rod (12) and the trigger rod; a push post (35) is provided on the locking block (14) on the locking rod (12). When the locking block (14) is pressed against the connector (11), the push post (35) can push the trigger rod downward, and the second elastic element (5) provides the trigger rod with an upward reset force.

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