An anti-freezing frame for a water tower in a power plant

Abstract

The present invention discloses an anti-freezing frame for a water tower in a power plant, comprising: a plurality of vertical rods arranged around the water tower, and clamping pipes are respectively hinged to both sides of the bottom ends of the vertical rods; a plurality of connecting rods, and both ends of each connecting rod are respectively inserted into the clamping pipes to cooperate with the vertical rods to form an annular frame structure around the water tower; a blocking wall or a rolling shutter door is arranged between the vertical rods, and the blocking wall comprises a plurality of baffles arranged between the vertical rods; and a heat preservation board is arranged above the baffles. The present application discloses an anti-freezing frame for a water tower in a power plant. By arranging a plurality of vertical rods around the water tower and connecting the vertical rods into an annular frame structure, arranging baffles between the vertical rods to form a partition wall, and arranging a heat preservation board above the baffles, the water tower is surrounded, which not only has a stable structure, but also effectively plays a role in heat preservation and wind prevention.

Description

Technical Field

[0001] The present invention relates to the technical field of water tower anti-freezing, and particularly to an anti-freezing frame for a power plant water tower. Background Art

[0002] As one of the main power generation forms in China, a thermal power plant needs to heat a large amount of water to the state of water vapor during power generation, and drive a steam turbine to rotate through the water vapor, thereby driving a generator to operate and generate electricity. In this process, in order to save water, it is necessary to build a circulating cooling water device and building, so that the hot water discharged from the condenser can be cooled in the water tower and reused.

[0003] In order to ensure that the water temperature in the water tower is suitable for the generator set, it is necessary to set up a heat preservation structure around the water tower in low-temperature weather. In the prior art, a simple film enclosure is often selected. Although this method has a certain heat preservation effect, its structural strength is not high and it is easy to be damaged in windy weather. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-freezing frame for a power plant water tower, which can play a role in heat preservation of the water tower in low-temperature weather, and has relatively high structural strength, effectively avoiding damage in windy weather, including:

[0005] Several vertical rods are arranged around the water tower, and clamping pipes are respectively hinged on both sides of the bottom end of the vertical rod;

[0006] Several connecting rods, both ends of the connecting rod are respectively inserted into the clamping pipes to cooperate with the vertical rods to form an annular frame structure around the water tower;

[0007] A blocking wall or a rolling shutter door is arranged between the vertical rods, and the blocking wall includes several baffles arranged between the vertical rods;

[0008] A heat preservation board is arranged above the baffle;

[0009] According to the shape of the water tower, several vertical rods are arranged around the water tower, and the vertical rods are connected by the connecting rods to form an annular frame structure between the vertical rods. After this step, a relatively stable structure is formed between the vertical rods. Several baffles are arranged between the vertical rods to form a blocking wall for heat preservation. A rolling shutter door is arranged at the position where people need to enter and exit frequently. A closed space is composed of the blocking wall, the rolling shutter door and the heat preservation board, which plays a role in heat preservation and wind resistance of the water tower.

[0010] In some embodiments of the present application, in order to avoid the problem that the connecting rod and the clamping tube are prone to detachment, the antifreeze frame is improved. A first socket is provided on the side of the clamping tube, and second sockets are provided at both ends of the connecting rod at positions corresponding to the first socket. A common bolt is inserted through the first socket and the second socket to fix the connecting rod and the clamping tube.

[0011] In some embodiments of the present application, in order to enable the connecting rod to better adapt to the shape and size of the frame structure to be built, the connecting rod is made telescopic and the connecting rod is improved. The connecting rod includes:

[0012] A central tube, with a pair of third sockets provided on the side of the central tube;

[0013] A pair of docking rods, slidably connected to both ends of the central tube. One end of the docking rod opposite the central tube is used to dock with the clamping tube, and a number of positioning holes are also provided on the side of the docking rod;

[0014] A handwheel, with an axial screw provided at the axis of the handwheel. The axial screw passes through the third socket and the positioning hole to relatively fix the docking rod and the central tube;

[0015] According to the actual requirements, determine the elongation of the connecting rod, then insert the axial screw into the third socket and the positioning hole, and then turn the handwheel to relatively fix the docking rod and the central tube.

[0016] In some embodiments of the present application, in order to be able to install the baffle on the side of the vertical rod to form a partition wall, the vertical rod and the baffle are improved. A clamping plate is hinged on the side of the vertical rod, and a clamping groove is provided on the side of the clamping plate;

[0017] Clamping grooves and clamping blocks are also respectively provided on both sides of the baffle. The baffle in contact with the clamping plate realizes the clamping connection between the two through the cooperation of the clamping groove and the clamping block, and the baffles realize the mutual clamping connection through the cooperation of the clamping groove and the clamping block;

[0018] When installing the baffle, first select a baffle, insert its clamping block into the clamping groove of the clamping plate, and then extend along this baffle, and sequentially insert the baffles through the cooperation of the clamping block and the clamping groove, so as to form a blocking wall between two adjacent vertical rods.

[0019] In some embodiments of the present application, in order to be able to install the baffle more firmly and to make the baffle more neat, the antifreeze frame is improved. A number of bottom reinforcement plate frames are provided above the connecting rod;

[0020] The bottom reinforcement plate frame includes a pair of straight plates, and a cross plate is arranged between the straight plates;

[0021] An upper notch is formed above the cross plate of the bottom reinforcement plate frame, and a lower notch is formed below the cross plate. The connecting rod is located in the lower notch, and the bottom end of the baffle is limited in the upper notch.

[0022] In some embodiments of the present application, in order to further increase the stability of the connection between the vertical rods, the connection structure between the vertical rods is further improved, and a plurality of top reinforcement plate frames are also arranged between the clamping plates;

[0023] The top reinforcement plate frame includes a reinforcement block. A pair of limiting plates are arranged at the bottom of the reinforcement block. The top end of the baffle is inserted between the limiting plates. A clamping groove and a clamping block are respectively arranged on both sides of the reinforcement block. The clamping plate and the reinforcement block are clamped with each other through the cooperation of the clamping groove and the clamping block, and the reinforcement blocks are clamped with each other through the cooperation of the clamping groove and the clamping block;

[0024] By connecting the reinforcement blocks end to end, a pulling force is formed between the top ends of the vertical rods, further enhancing the structural strength of the annular structure composed of the vertical rods, and further limiting the movement of the baffle from the top, so that the overall structural strength of the anti-freezing frame is strengthened.

[0025] In some embodiments of the present application, an installation method of the heat preservation board is provided. The heat preservation board is fixed between the vertical rods through installation blocks;

[0026] Clamping blocks and clamping grooves are also arranged on both sides of the installation block. The installation block and the clamping plate are clamped with each other through the cooperation of the clamping groove and the clamping block; the installation blocks are clamped with each other through the cooperation of the clamping groove and the clamping block;

[0027] The heat preservation board is hinged to the top of the installation block.

[0028] In some embodiments of the present application, in order to make the heat preservation board stable, the heat preservation board and the installation block are improved, and a positioning mechanism is arranged between the heat preservation board and the installation block to make the heat preservation board form a stable specified angle relative to the installation block.

[0029] In some embodiments of the present application, in order to enable the heat preservation board to point to a specified direction, a specific structure of the positioning mechanism is provided. The positioning mechanism includes:

[0030] Threaded tube;

[0031] A pair of positioning screws, the positioning screws are threadedly connected to both ends of the threaded tube, and a rotating tube is rotatably connected to one end of the positioning screw opposite to the threaded tube. The rotating tube located at the upper end of the threaded tube is rotatably hinged to the side of the heat preservation board, and the rotating tube located at the lower end of the threaded tube is hinged to the side of the mounting block;

[0032] Turn the threaded tube to displace the positioning screws outward or inward simultaneously, so as to drive the heat preservation board to rotate relative to the mounting block.

[0033] The present application discloses an anti-freezing frame for a water tower in a power plant. By arranging a number of vertical rods around the water tower and connecting the vertical rods into an annular frame structure, baffles are arranged between the vertical rods to form partition walls, and heat preservation boards are arranged above the baffles, thereby surrounding the water tower. It not only has a stable structure, but also effectively plays a role in heat preservation and wind prevention.

[0034] The technical solutions of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of a part of the anti-freezing frame for a water tower with a rolling door installed in the present application;

[0036] Figure 2 It is another schematic structural diagram of a part of the anti-freezing frame for a water tower with a rolling door installed in the present application;

[0037] Figure 3 It is a schematic structural diagram of a part of the anti-freezing frame for a water tower with a baffle installed in the present application;

[0038] Figure 4 It is a schematic structural diagram of the connecting rod of the present application;

[0039] Figure 5 It is a schematic structural diagram of the reinforcing block of the present application;

[0040] Figure 6 It is a top view of the baffle of the present application;

[0041] Figure 7 It is a schematic structural diagram of the bottom reinforcing plate frame of the present application;

[0042] Figure 8 It is a schematic structural diagram of the heat preservation board of the present application.

[0043] Reference Signs

[0044] 1. Vertical pole; 2. Clamping pipe; 3. Rotating pipe; 4. Roller shutter door; 5. Baffle; 6. Thermal insulation board; 7. Bolt; 8. Central pipe; 9. Docking rod; 10. Positioning hole; 11. Handwheel; 12. Clamping plate; 13. Card slot; 14. Clamping block; 15. Straight plate; 16. Horizontal plate; 17. Reinforcement block; 18. Limit plate; 19. Installation block; 20. Threaded pipe; 21. Positioning screw. Detailed implementation mode

[0045] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0046] Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meaning understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not represent any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object to be described changes, the relative positional relationship may also change accordingly.

[0047] As one of the main power generation forms in China, during the power generation process in thermal power plants, a large amount of water needs to be heated to the state of water vapor, and the steam turbine is driven to rotate by the water vapor, thereby driving the generator to operate and generate electricity. In this process, in order to save water, it is necessary to build a circulating cooling water device and building, so that the hot water discharged from the condenser can be cooled in the water tower and reused.

[0048] In order to ensure that the water temperature in the water tower is suitable for the generator set, it is necessary to set up a thermal insulation structure around the water tower in low-temperature weather. In the prior art, a simple film enclosure is often selected. Although this method has a certain thermal insulation effect, its structural strength is not high and it is easy to be damaged in windy weather.

[0049] In order to solve the above problems, the present application provides an anti-freezing frame for a power plant water tower.

[0050] Embodiment:

[0051] The purpose of the present invention is to provide an anti-freezing frame for a power plant water tower, so as to play a role in thermal insulation of the water tower in low-temperature weather, and it has relatively high structural strength, effectively avoiding damage in windy weather, such as Figure 1 such as Figure 2 and Figure 3, including:

[0052] A number of vertical rods 1 are arranged around the water tower, and clamping pipes 2 are hinged on both sides of the bottom end of the vertical rod 1.

[0053] A number of connecting rods, and both ends of the connecting rod are respectively inserted into the clamping pipe 2 to cooperate with the vertical rod 1 to form an annular frame structure around the water tower.

[0054] A blocking wall or a rolling shutter door 4 is arranged between the vertical rods 1, and the blocking wall includes a number of baffles 5 arranged between the vertical rods 1.

[0055] A heat preservation board 6 is arranged above the baffle 5.

[0056] According to the shape of the water tower, a number of the vertical rods 1 are arranged around the water tower. The vertical rods 1 are connected by the connecting rods so that an annular frame structure is formed between the vertical rods 1. After this step, a relatively stable structure is formed between the vertical rods 1. A number of baffles 5 are arranged between the vertical rods 1 to form a blocking wall for heat preservation. A rolling shutter door 4 is arranged at the position where people need to enter and exit frequently. A closed space is composed of the blocking wall, the rolling shutter door 4 and the heat preservation board 6, which plays a role in heat preservation and wind resistance for the water tower.

[0057] In some embodiments of the present application, in order to avoid the problem that the connecting rod and the clamping pipe 2 are prone to disengagement, the anti-freezing frame is improved. A first socket is arranged on the side of the clamping pipe 2, and second sockets are arranged at the positions of both ends of the connecting rod relative to the first socket. A common bolt 7 is inserted through the first socket and the second socket to fix the connecting rod and the clamping pipe 2.

[0058] In some embodiments of the present application, in order to enable the connecting rod to better adapt to the shape and size of the frame structure to be built, the connecting rod is made telescopic, and the connecting rod is improved, such as Figure 4 , the connecting rod includes:

[0059] A central pipe 8, and a pair of third sockets are arranged on the side of the central pipe 8.

[0060] A pair of docking rods 9 are slidably connected to both ends of the central pipe 8. One end of the docking rod 9 relative to the central pipe 8 is used for docking with the clamping pipe 2, and a number of positioning holes 10 are also arranged on the side of the docking rod 9.

[0061] A hand wheel 11, and an axial center screw is arranged at the axial center of the hand wheel 11. The axial center screw passes through the third socket and the positioning hole 10 to relatively fix the docking rod 9 and the central pipe 8.

[0062] According to the actual requirements, determine the elongation of the connecting rod, then insert the axial screw into the third socket and the positioning hole 10, and then turn the handwheel 11 to relatively fix the docking rod 9 and the central tube 8.

[0063] In some embodiments of the present application, in order to be able to install the baffle 5 on the side of the vertical rod 1 to form a partition wall, the vertical rod 1 and the baffle 5 are improved. A clamping plate 12 is hinged to the side of the vertical rod 1, and a clamping groove 13 is provided on the side of the clamping plate 12.

[0064] Clamping grooves 13 and clamping blocks 14 are also respectively provided on both sides of the baffle 5. The baffle 5 in contact with the clamping plate 12 realizes the clamping connection between the two through the cooperation of the clamping groove 13 and the clamping block 14, and the baffles 5 realize the mutual clamping connection through the cooperation of the clamping groove 13 and the clamping block 14.

[0065] Preferably, both the clamping block 14 and the clamping groove 13 are in a T-shaped structure.

[0066] When installing the baffle 5, first select a baffle 5, insert its clamping block 14 into the clamping groove 13 of the clamping plate 12, and then continue along this baffle 5, and insert the baffle 5 in sequence through the cooperation of the clamping block 14 and the clamping groove 13, so as to form a blocking wall between two adjacent vertical rods 1.

[0067] In some embodiments of the present application, in order to be able to install the baffle 5 more firmly and make the baffle 5 more neat, the anti-freezing frame is improved, as Figure 7 , a plurality of bottom reinforcement plate frames are provided above the connecting rod.

[0068] The bottom reinforcement plate frame includes a pair of straight plates 15, and a cross plate 16 is provided between the straight plates 15.

[0069] An upper notch is formed above the cross plate 16 of the bottom reinforcement plate frame, and a lower notch is formed below the cross plate 16. The connecting rod is located in the lower notch, and the bottom end of the baffle 5 is limited in the upper notch.

[0070] In some embodiments of the present application, in order to further increase the stability of the connection between the vertical rods 1, the connection structure between the vertical rods 1 is further improved, and a plurality of top reinforcement plate frames are also provided between the clamping plates 12.

[0071] The top reinforcement plate frame includes a reinforcement block 17. A pair of limit plates 18 are provided at the bottom of the reinforcement block 17. The top end of the baffle 5 is inserted between the limit plates 18. A card slot 13 and a card block 14 are respectively provided on both sides of the reinforcement block 17. The card plate 12 and the reinforcement block 17 are clamped together through the cooperation of the card slot 13 and the card block 14. The reinforcement blocks 17 are clamped to each other through the cooperation of the card slot 13 and the card block 14.

[0072] By connecting the reinforcement blocks 17 end to end, a tensile force is formed between the top ends of the vertical rods 1, further enhancing the structural strength of the circular structure composed of the vertical rods 1, and further limiting the movement of the baffle 5 from the top, strengthening the overall structural strength of the anti-freezing frame.

[0073] In some embodiments of the present application, a mounting method for the heat preservation board 6 is provided. The heat preservation board 6 is fixed between the vertical rods 1 through a mounting block 19.

[0074] Card blocks 14 and card slots 13 are also provided on both sides of the mounting block 19. The mounting block 19 and the card plate 12 are clamped together through the cooperation of the card slot 13 and the card block 14; the mounting blocks 19 are clamped to each other through the cooperation of the card slot 13 and the card block 14.

[0075] The heat preservation board 6 is hinged to the top of the mounting block 19.

[0076] In some embodiments of the present application, in order to make the heat preservation board 6 stable, the heat preservation board 6 and the mounting block 19 are improved, such as Figure 5 , a positioning mechanism is provided between the heat preservation board 6 and the mounting block 19 to make the heat preservation board 6 form a stable specified angle relative to the mounting block 19.

[0077] In some embodiments of the present application, in order to make the heat preservation board 6 point to a specified direction, a specific structure of the positioning mechanism is provided, such as Figure 8 , the positioning mechanism includes:

[0078] A threaded tube 20.

[0079] A pair of positioning screws 21, the positioning screws 21 are threadedly connected to both ends of the threaded tube 20. The opposite ends of the positioning screws 21 and the threaded tube 20 are rotatably connected with a rotating tube 3. The rotating tube 3 located at the upper end of the threaded tube 20 is rotatably hinged to the side of the heat preservation board 6, and the rotating tube 3 located at the lower end of the threaded tube 20 is hinged to the side of the mounting block 19.

[0080] Turn the threaded pipe 20 to displace the positioning screw rod 21 outward or inward simultaneously, so as to drive the insulation board 6 to rotate relative to the mounting block 19.

[0081] To further elaborate on the technical concept of the present invention, the technical solution of the present invention will be described in combination with specific application scenarios.

[0082] Now it is necessary to perform heat preservation treatment on the water tower of a thermal power plant to avoid the influence of low-temperature weather and windy weather on the water temperature in the water tower.

[0083] Select a number of vertical rods 1 and arrange the vertical rods 1 evenly around the water tower. Insert the connecting rod into the clamping pipe 2 on the side of the vertical rod 1. According to the relative positions between the vertical rods 1, rotate the connecting rod so that the other end of the connecting rod is inserted into the clamping pipe 2 on the side of another vertical rod 1. Insert the bolt 7 into the first socket on the side of the clamping pipe 2 and the second socket at the end of the connecting rod to fix the clamping pipe 2 and the connecting rod, thereby building an annular frame structure around the water tower.

[0084] As Figure 6 , when installing the baffle 5, first select a baffle 5, insert its clamping block 14 into the card slot 13 of the card board 12, and then continue along this baffle 5 and insert the baffle 5 in turn through the cooperation of the clamping block 14 and the card slot 13, so as to form a blocking wall between two adjacent vertical rods 1. Similarly, install the rolling shutter door 4 between the vertical rods 1.

[0085] The rolling shutter door 4 is a conventional rolling shutter door 4. The sides of the sliding plate members on both sides of the rolling shutter door 4 are also provided with clamping heads adapted to the card slots 13 of the card board 12, so that the sliding plate members can be clamped with the card board 12, thereby meeting the installation of the conventional rolling shutter door 4.

[0086] To further enhance the structural strength of the overall structure, a top reinforcement plate frame is also provided above the baffle 5. The top reinforcement plate frame includes a reinforcement block 17. A pair of limiting plates 18 are provided at the bottom of the reinforcement block 17. The top end of the baffle 5 is inserted between the limiting plates 18. Card slots 13 and clamping blocks 14 are respectively provided on both sides of the reinforcement block 17. The card board 12 and the reinforcement block 17 are clamped with each other through the cooperation of the card slot 13 and the clamping block 14. The reinforcement blocks 17 are clamped with each other through the cooperation of the card slot 13 and the clamping block 14. By connecting the reinforcement blocks 17 end to end, a tensile force is formed between the top ends of the vertical rods 1, further enhancing the structural strength of the annular structure composed of the vertical rods 1, and further limiting the movement of the baffle 5 from the top, so that the overall structural strength of the anti-freezing frame is enhanced.

[0087] When installing the heat preservation board 6, first install the installation block 19 on the top of the reinforcement board frame. By connecting the head and tail of the installation block 19, and then screwing the threaded pipe 20, the positioning screw rod 21 is displaced outward or inward at the same time, so as to drive the heat preservation board 6 to rotate relative to the installation block 19.

[0088] The present application discloses an anti-freezing frame for a water tower of a power plant. By arranging a plurality of vertical rods around the water tower and connecting the vertical rods into an annular frame structure, arranging baffles between the vertical rods to form a partition wall, and arranging a heat preservation board above the baffles, the water tower is surrounded. It not only has a stable structure, but also effectively plays a role in heat preservation and wind prevention.

[0089] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An anti-freezing frame for a water tower in a power plant, characterized in that, it includes: A number of vertical rods arranged around the water tower, and clamping pipes are respectively hinged on both sides of the bottom ends of the vertical rods; A number of connecting rods, and both ends of the connecting rods are respectively inserted into the clamping pipes to cooperate with the vertical rods to form an annular frame structure around the water tower; A blocking wall or a rolling shutter door is arranged between the vertical rods, and the blocking wall includes a number of baffles arranged between the vertical rods; A heat preservation board is arranged above the baffle; A first socket is arranged on the side of the clamping pipe, and second sockets are arranged at positions of both ends of the connecting rod relative to the first socket. The first socket and the second socket are fixed together by inserting a common bolt, so that the connecting rod and the clamping pipe are fixed; The connecting rod includes: A central pipe, and a pair of third sockets are arranged on the side of the central pipe; A pair of docking rods are slidably connected to both ends of the central pipe. One end of the docking rod relative to the central pipe is used to dock with the clamping pipe, and a number of positioning holes are also arranged on the side of the docking rod; A handwheel, and a central screw rod is arranged at the axis of the handwheel. The central screw rod passes through the third socket and the positioning hole, so that the docking rod and the central pipe are relatively fixed; A clamping plate is hinged on the side of the vertical rod, and a clamping groove is arranged on the side of the clamping plate; Clamping grooves and clamping blocks are also respectively arranged on both sides of the baffle. The baffle contacting the clamping plate realizes the clamping connection between the two through the cooperation of the clamping groove and the clamping block, and the baffles realize the mutual clamping connection through the cooperation of the clamping groove and the clamping block; A number of bottom reinforcement plate frames are arranged above the connecting rod; The bottom reinforcement plate frame includes a pair of straight plates, and a cross plate is arranged between the straight plates; An upper notch is formed above the cross plate of the bottom reinforcement plate frame, and a lower notch is formed below the cross plate. The connecting rod is located in the lower notch, and the bottom end of the baffle is limited in the upper notch; A number of top reinforcement plate frames are also arranged between the clamping plates; The top reinforcement plate frame includes a reinforcement block, and a pair of limiting plates are arranged at the bottom of the reinforcement block. The top end of the baffle is inserted between the limiting plates. Clamping grooves and clamping blocks are respectively arranged on both sides of the reinforcement block. The clamping plate and the reinforcement block realize the clamping connection between the two through the cooperation of the clamping groove and the clamping block, and the reinforcement blocks realize the mutual clamping connection through the cooperation of the clamping groove and the clamping block; The heat preservation board is fixed between the vertical rods through mounting blocks; Clamping blocks and clamping grooves are also arranged on both sides of the mounting block. The mounting block and the clamping plate realize the clamping connection between the two through the cooperation of the clamping groove and the clamping block; the mounting blocks realize the mutual clamping connection through the cooperation of the clamping groove and the clamping block; The heat preservation board is hinged to the top of the mounting block.

2. An anti-freezing frame for a water tower in a power plant according to claim 1, characterized in that, A positioning mechanism is arranged between the heat preservation board and the mounting block, so that the heat preservation board forms a stable specified angle relative to the mounting block.

3. An anti-freezing frame for a water tower in a power plant according to claim 2, characterized in that, The positioning mechanism includes: A threaded pipe; A pair of positioning screws, the positioning screws are threadedly connected to both ends of the threaded tube, and a rotating tube is rotatably connected to one end of the positioning screw opposite to the threaded tube. The rotating tube located at the upper end of the threaded tube is rotatably hinged to the side of the heat preservation board, and the rotating tube located at the lower end of the threaded tube is hinged to the side of the mounting block.

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