Modular connection device for a heating furnace fuel gas flexible connection

Abstract

The utility model discloses a kind of modularization connecting devices of heating furnace fuel gas soft connection, it is related to fuel gas delivery technical field.The modularization connecting device of heating furnace fuel gas soft connection, including furnace body, the support seat is fixedly installed in furnace body side, support seat is fixedly installed with inlet end, the flange end face of inlet end is closely attached with sealing ring, the end face of the flange of gas outlet flange is closely attached with the side of sealing ring away from inlet end, and the flange between inlet end and gas outlet flange is fixedly connected by four fastening bolts, the other end of gas outlet flange is fixedly installed with bellows, floating frame is rectangular ring structure and is set in bellows outside, the other end of bellows is fixedly installed with gas inlet flange, and the flexible characteristic of bellows can compensate displacement generated by vibration, thermal expansion and contraction, avoid stress damage of rigid connection, ensure fuel gas transmission continuous stability, overall structure gives consideration to security, stability and maintenance convenience, improve device operating reliability and durability.

Description

Technical Field

[0001] This utility model relates to the field of fuel gas transportation technology, and in particular to a modular connection device for a flexible connection of fuel gas in a heating furnace. Background Technology

[0002] Traditional connection methods for fuel gas delivery systems in heating furnaces generally have many defects. First, insufficient sealing performance is a prominent problem. The sealing structure of the connection is simple and cannot adapt to complex working conditions such as high temperature and vibration. Gaps are easily generated due to poor contact surface fit, leading to fuel gas leakage. This not only wastes energy but also poses a risk of fire, explosion and other safety accidents, posing a serious threat to the production environment and the safety of operators.

[0003] Secondly, the resistance to vibration and deformation is weak. Traditional connections mostly use rigid structures and lack effective buffering mechanisms. When the heating furnace vibrates during operation or expands and contracts due to temperature changes, the connection parts will be subjected to large stresses. Under long-term action, this can easily lead to cracks, loosening, or even breakage of components such as pipes and flanges. This not only affects the stable transmission of fuel gas but also increases the frequency of equipment failures and shortens the overall service life.

[0004] Furthermore, installation and maintenance are inconvenient. Traditional structures are mostly monolithic designs, and the connection parts lack standardized and modular assembly methods. During installation, multiple components need to be precisely aligned, which consumes a lot of time and manpower. When a part fails and needs to be repaired or replaced, it is often necessary to disassemble multiple surrounding components, resulting in excessive downtime and seriously affecting production efficiency.

[0005] Furthermore, traditional connection methods suffer from insufficient adaptability and compatibility. Different specifications of heating furnaces and fuel gas pipelines require specialized connecting components, resulting in poor versatility and difficulty in flexibly addressing various operating conditions. This increases equipment procurement costs and inventory pressure. Simultaneously, traditional connection methods have low tolerance for installation errors; even minor dimensional deviations can affect the connection effect, further reducing system reliability and stability. These issues collectively make it difficult for traditional connection devices to meet the requirements of efficient, safe, and stable production in practical applications. Utility Model Content

[0006] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a modular connection device for the soft connection of fuel gas in a heating furnace, which can solve the problems of weak vibration and deformation resistance and poor installation and maintenance convenience.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A modular connection device for a flexible fuel gas connection in a heating furnace includes a furnace body, a support base fixedly installed on the side of the furnace body, an inlet end fixedly installed on the support base, a sealing ring tightly abutting the flange end face of the inlet end, an outlet flange end face tightly abutting the side of the sealing ring away from the inlet end, the flange at the inlet end and the outlet flange being fixedly connected by four fastening bolts, and a bellows fixedly installed at the other end of the outlet flange.

[0009] Four dampers are distributed circumferentially along the axial direction of the corrugated pipe on the support base. The fixed end of the damper is connected to the support base, and the telescopic end faces away from the furnace body. A first spring is sleeved on the outside of each damper. One end of the first spring is fixedly connected to the support base, and the other end is fixedly connected to the floating frame. The telescopic end of the damper is fixedly connected to the floating frame.

[0010] The floating frame is a rectangular ring structure and is sleeved on the outside of the corrugated pipe. The inner wall of the floating frame has four slides distributed radially. A floating rod is slidably installed in each slide. An arc-shaped block is fixedly installed at one end of the floating rod that extends radially and is close to the corrugated pipe. A second spring is sleeved on each floating rod. One end of the second spring is fixedly connected to the arc-shaped block, and the other end is fixedly connected to the inner wall of the slide of the floating frame. The inner surfaces of the four arc-shaped blocks are closely attached to the outer wall of the corrugated pipe.

[0011] An air inlet flange is fixedly installed at the other end of the bellows. Another sealing ring is tightly attached to the end face of the air inlet flange away from the bellows. The side of the sealing ring away from the air inlet flange is tightly attached to the flange end face of the connecting pipe. The air inlet flange and the flange of the connecting pipe are fixedly connected by four other fastening bolts.

[0012] The end face of the connecting pipe away from the inlet flange is closely fitted with another sealing ring, and the side of the sealing ring away from the connecting pipe is closely fitted with the end face of the gas pipe; a pipe clamp is snapped into the outer wall of the joint between the connecting pipe and the gas pipe, and the pipe clamp is locked with quick-release bolts to hold the outer walls of the two pipes tightly.

[0013] Preferably, the four dampers are distributed at equal intervals along the circumference of the support, and the included angle between adjacent dampers is a right angle.

[0014] Preferably, the axis of the first spring is collinear with the axis of the damper, and the first spring is in a pre-compressed state.

[0015] Preferably, a gap is left between the inner wall of the rectangular ring structure of the floating frame and the outer wall of the bellows, and the distance of the gap is greater than the maximum radial movement distance of the arc block.

[0016] Preferably, the inner surfaces of the four arc-shaped blocks are all arc-shaped surfaces adapted to the outer wall of the bellows, and the four arc-shaped blocks together form a circular clamping space that matches the outer diameter of the bellows.

[0017] Preferably, the sealing rings between the air inlet flange and the flange of the connecting pipe, and the sealing rings between the connecting pipe and the gas pipe, are all O-rings with a circular cross-section.

[0018] Preferably, the pipe clamp includes an upper clamp body and a lower clamp body that are adapted to each other, and the quick-release bolt passes through the ends of the upper clamp body and the lower clamp body and is locked by a nut. The quick-release bolt is a wing bolt.

[0019] Preferably, the two ends of the bellows are fixedly connected to the outlet flange and the inlet flange by welding, respectively, and the sealing surface of the weld is flush with the end face of the flange.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] (1) The modular connection device of the fuel gas soft connection of the heating furnace provides a reliable foundation for the whole by the stable connection between the furnace body and the support base, ensuring the stable operation of each component. The sealing ring forms multiple seals between the inlet end and the outlet flange, the inlet flange and the connecting pipe, and the connecting pipe and the gas pipe, effectively preventing fuel gas leakage and improving safety. The damper cooperates with the first spring to reduce the impact of vibration on the bellows and the connection parts through axial buffering. The radial buffer structure composed of the floating frame, floating rod, second spring and arc block can adapt to the radial deformation of the bellows, avoid excessive local stress, protect the bellows and extend its service life.

[0022] (2) The modular connection device for the fuel gas soft connection of the heating furnace is modularly assembled by fastening bolts and flanges, which facilitates component replacement. Quick-release bolts and pipe clamps make it easier to connect the pipes and gas pipes, shortening maintenance time. The flexible characteristics of the corrugated pipe can compensate for the displacement caused by vibration and thermal expansion and contraction, avoid stress damage to rigid connections, and ensure continuous and stable fuel gas transmission. The overall structure takes into account safety, stability and maintenance convenience, improving the reliability and durability of the device operation. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of a modular connection device for a heating furnace fuel gas flexible connection according to the present invention;

[0025] Figure 2 This is a schematic diagram of a modular connection device for a heating furnace fuel gas flexible connection according to the present invention;

[0026] Figure 3This is a cross-sectional schematic diagram of a modular connection device for a heating furnace fuel gas flexible connection according to the present invention.

[0027] Figure 4 This is a cross-sectional schematic diagram of a modular connection device for a heating furnace fuel gas flexible connection according to the present invention.

[0028] Reference numerals in the attached drawings: 1. Furnace body; 2. Support base; 3. Damper; 4. First spring; 5. Inlet end; 6. Sealing ring; 7. Gas outlet flange; 8. Fastening bolt; 9. Floating frame; 10. Floating rod; 11. Second spring; 12. Arc block; 13. Bellows; 14. Gas inlet flange; 15. Connecting pipe; 16. Pipe clamp; 17. Quick-release bolt; 18. Gas pipeline. Detailed Implementation

[0029] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Please see Figure 1-4This utility model provides a technical solution: a modular connection device for a heating furnace fuel gas soft connection, including a furnace body 1, a support base 2 fixedly installed on the side of the furnace body 1, an inlet end 5 fixedly installed on the support base 2, a sealing ring 6 tightly attached to the flange end face of the inlet end 5, and the end face of the outlet flange 7 tightly attached to the side of the sealing ring 6 away from the inlet end 5, and four fastening bolts 8 fixedly connecting the flange of the inlet end 5 and the outlet flange 7, and a bellows 13 fixedly installed at the other end of the outlet flange 7;

[0034] Furnace body 1 provides space for fuel gas combustion, and support base 2 provides basic fixed support for the entire connection device, so that inlet end 5 is stably installed on the side of furnace body 1. The flange of inlet end 5 and outlet flange 7 are fixed by four fastening bolts 8. The tightly fitted sealing ring 6 is squeezed and deformed to fill the small gaps on the two flange end faces, achieving initial sealing of fuel gas transportation and preventing leakage. The bellows 13 fixed at the other end of outlet flange 7 serves as a flexible connection component, which can adapt to vibration and deformation during subsequent transmission, providing a flexible channel for fuel gas to be transmitted from outlet flange 7 to subsequent components, avoiding stress damage to rigid connection caused by vibration, etc.

[0035] Four dampers 3 are distributed circumferentially along the bellows 13 axis on the support base 2. The fixed end of the damper 3 is connected to the support base 2, and the telescopic end faces away from the furnace body 1.

[0036] Each damper 3 is fitted with a first spring 4 on its outer side. One end of the first spring 4 is fixedly connected to the support base 2, and the other end is fixedly connected to the floating frame 9. The telescopic end of the damper 3 is fixedly connected to the floating frame 9.

[0037] Four dampers 3 are distributed along the axial direction of the bellows 13 on the support base 2. Their fixed ends are connected to the support base 2, and their telescopic ends are connected to the floating frame 9, forming an axial buffer structure. When the device is subjected to vibration or thermal expansion and contraction, causing axial displacement, the bellows 13 undergoes axial deformation, which drives the floating frame 9 to move axially. At this time, the dampers 3 consume vibration energy through their own telescopic characteristics, slowing down the movement speed of the floating frame 9; at the same time, the first spring 4 sleeved on the outside of the dampers 3 is stretched or compressed as the floating frame 9 moves, using its own elastic force to generate a counterforce, which helps to buffer the axial impact; the two work together to keep the floating frame 9 axially stable, reducing the impact of axial force on the bellows 13 and various connecting parts.

[0038] The floating frame 9 has a rectangular ring structure and is sleeved on the outside of the bellows 13. Four slides are distributed radially on the inner wall of the floating frame 9. A floating rod 10 is slidably installed in each slide. An arc-shaped block 12 is fixedly installed at the end of the floating rod 10 that extends radially and is close to the bellows 13.

[0039] Each floating rod 10 is fitted with a second spring 11. One end of the second spring 11 is fixedly connected to the arc block 12, and the other end is fixedly connected to the inner wall of the slide of the floating frame 9. The inner surfaces of the four arc blocks 12 are closely attached to the outer wall of the bellows 13.

[0040] The floating frame 9 is fitted onto the outside of the bellows 13. The four slides on its inner wall provide radial sliding tracks for the floating rod 10. Under normal conditions, the second spring 11 is in a natural or slightly compressed state, pushing the floating rod 10 to drive the arc block 12 to fit tightly against the outer wall of the bellows 13, forming a stable clamp on the bellows 13. When the bellows 13 undergoes radial displacement due to vibration or deformation, it will squeeze the arc block 12 in the corresponding direction. The arc block 12 pushes the floating rod 10 to slide along the slide away from the bellows 13, while compressing the second spring 11 on that side. The elastic potential energy of the second spring 11 is converted into a buffer force to offset the radial impact force. The second spring 11 on the other side pushes the arc block 12 to keep it in contact with the bellows 13, ensuring stable support for the bellows 13 and adapting to its radial deformation.

[0041] An air inlet flange 14 is fixedly installed at the other end of the bellows 13. Another sealing ring 6 is closely attached to the end face of the air inlet flange 14 away from the bellows 13. The side of the sealing ring 6 away from the air inlet flange 14 is closely attached to the flange end face of the connecting pipe 15. The air inlet flange 14 and the flange plate of the connecting pipe 15 are fixedly connected by four other fastening bolts 8.

[0042] The other end of the bellows 13 is connected to the connecting pipe 15 via a fixedly installed air inlet flange 14. The sealing ring 6 between the air inlet flange 14 and the flange end face of the connecting pipe 15 is pressed together by the fixing action of four fastening bolts 8 to form a sealing interface, preventing fuel gas from leaking at the connection. The flexibility of the bellows 13 can compensate for the relative displacement between the air inlet flange 14 and the connecting pipe 15 caused by installation errors or vibration, ensuring that fuel gas can be stably transported from the bellows 13 through the air inlet flange 14 to the connecting pipe 15.

[0043] Another sealing ring 6 is tightly affixed to the end face of the connecting pipe 15 away from the inlet flange 14, and the end face of the gas pipe 18 is tightly affixed to the side of the sealing ring 6 away from the connecting pipe 15.

[0044] A pipe clamp 16 is attached to the outer wall of the connection between the connecting pipe 15 and the gas pipe 18. The pipe clamp 16 is locked by quick-release bolts 17 to hold the outer walls of the two pipes tightly.

[0045] The end faces of the connecting pipe 15 and the gas pipe 18 are initially sealed by a tightly fitting sealing ring 6 to prevent fuel gas from leaking from the end face gaps. The pipe clamp 16, which is snapped onto the outer wall of the joint of the two pipes, generates a radial clamping force on the connecting pipe 15 and the gas pipe 18 after being locked by the quick-release bolt 17, further enhancing the tightness of the connection between the two pipes and preventing the end faces from separating due to vibration, etc., ensuring that the sealing ring 6 is always in an effective sealing state. The design of the quick-release bolt 17 facilitates quick disassembly and installation, making it convenient for later maintenance or replacement of parts, while ensuring the reliability of the connection, so that fuel gas can be stably delivered from the gas pipe 18 to the connecting pipe 15.

[0046] Working principle: During use, gas is output from gas pipeline 18, sealed by sealing ring 6 between connecting pipeline 15 and gas pipeline 18, and reinforced by pipe clamp 16 and quick-release bolt 17. It is then transmitted to inlet flange 14 through connecting pipeline 15. After being sealed and connected by sealing ring 6 and fastening bolt 8 between inlet flange 14 and connecting pipeline 15, it enters bellows 13. Bellows 13 compensates for vibration and deformation through radial buffering of floating frame 9, floating rod 10, second spring 11, arc block 12, and axial buffering of damper 3 and first spring 4. It is then sealed and connected by sealing ring 6 and fastening bolt 8 between outlet flange 7 and inlet end 5, and finally enters furnace body 1 through inlet end 5. Support base 2 provides stable support for all components throughout the process, ensuring stable transmission of fuel gas.

[0047] The stable connection between the furnace body 1 and the support base 2 provides a reliable foundation for the whole and ensures the stable operation of each component. The sealing ring 6 forms multiple seals between the inlet end 5 and the outlet flange 7, the inlet flange 14 and the connecting pipe 15, and the connecting pipe 15 and the gas pipe 18, which effectively prevents fuel gas leakage and improves safety. The damper 3 works with the first spring 4 to reduce the impact of vibration on the bellows 13 and the connection parts through axial buffering. The radial buffer structure composed of the floating frame 9, the floating rod 10, the second spring 11 and the arc block 12 can adapt to the radial deformation of the bellows 13, avoid excessive local stress, protect the bellows 13 and extend its service life.

[0048] The fastening bolts 8 and flanges enable modular assembly, facilitating component replacement. The quick-release bolts 17 and pipe clamps 16 make it easier to connect the pipes 15 and gas pipes 18, shortening maintenance time. The flexible characteristics of the corrugated pipe 13 can compensate for displacement caused by vibration and thermal expansion and contraction, avoiding stress damage to rigid connections and ensuring continuous and stable fuel gas transmission. The overall structure takes into account safety, stability and ease of maintenance, improving the reliability and durability of the device.

[0049] Structural Description: Furnace Body 1: The overall description is the main load-bearing structure of the heating furnace, usually in the shape of a cavity. Its position information is fixed at the starting end of the device. Its side is used to install support base 2. Its function is to provide a closed space for fuel gas combustion and to serve as the basic installation carrier for the entire connection device, supporting the stable assembly of subsequent components.

[0050] Support 2: The overall description is a block or frame structure with a certain rigidity. The position information is fixedly installed on the side of the furnace body 1. The inlet end 5 and the damper 3 are fixed on it at the same time. Its function is to provide a stable installation base for the inlet end 5, ensure its connection strength with the furnace body 1, and at the same time serve as a support carrier for the damper 3 to ensure the stable assembly of the axial buffer structure.

[0051] Damper 3: The overall description is a columnar buffer component that can be axially extended and retracted. Its position information is distributed on the support base 2 along the axial circumference of the bellows 13. The fixed end is connected to the support base 2, and the telescopic end faces away from the furnace body 1 and is connected to the floating frame 9. The outer side is fitted with a first spring 4. Its function is to consume the energy generated by the vibration of the device through its own telescopic characteristics, slow down the axial movement speed of the floating frame 9, play a damping and buffering role, and reduce the impact of axial impact on the bellows 13 and the connection parts.

[0052] First spring 4: The overall description is a spiral elastic component. It is positioned on the outside of the damper 3. One end is fixedly connected to the support 2 and the other end is fixedly connected to the floating frame 9. Its function is to be stretched or compressed as the floating frame 9 moves axially. It uses its own elastic force to generate a reverse force to assist the damper 3 in buffering axial impact and enhancing the axial stability of the floating frame 9.

[0053] Inlet end 5: The overall description is a pipe-shaped component with a flange structure. The position information is fixedly installed on the support 2. Its flange end face is sealed and connected to the end face of the gas outlet flange 7 through the sealing ring 6. Function: It serves as the starting section of the channel for fuel gas to enter the furnace body 1. It is connected to the gas outlet flange 7 through the flange structure to realize the initial transmission of fuel gas from the outside to the furnace body 1.

[0054] Sealing ring 6: The overall description is an elastic ring or sheet structure, usually made of gas-resistant and heat-resistant rubber or composite material. The location information is that it is closely attached between the flange end face of the inlet end 5 and the flange end face of the outlet flange 7, between the flange end face of the inlet flange 14 and the flange end face of the connecting pipe 15, and between the end face of the connecting pipe 15 and the gas pipe 18. Function: Under the compression of the flange or pipe end face, it deforms and fills the tiny gaps on the contact surface to achieve sealing of each connection part and prevent fuel gas leakage.

[0055] Outlet flange 7: The overall description is a disc-shaped flange structure with connection holes. One end is connected to the flange of the inlet end 5 by fastening bolts 8, and the other end is fixedly installed with bellows 13. Function: It serves as a connecting transition component between the inlet end 5 and the bellows 13. The flange connection enables the transmission of fuel gas from the inlet end 5 to the bellows 13, while providing a stable installation base for the bellows 13.

[0056] Fastening bolt 8: The overall description is a threaded rod-shaped connector used with a nut. The position information is that it passes through the flange hole of the inlet end 5 and the outlet flange 7, and the flange hole of the inlet flange 14 and the connecting pipe 15. Its function is to generate axial preload by tightening the nut, so as to tightly connect the two corresponding flanges, ensure that the sealing ring 6 is effectively squeezed to achieve a seal, and at the same time ensure the overall rigidity of the flange connection.

[0057] Floating frame 9: The overall description is a frame component with a rectangular ring structure. The inner wall is provided with radial slides. The position information is sleeved on the outside of the bellows 13 and connected to the telescopic end of the damper 3 and the end of the first spring 4. Function: It serves as the mounting carrier for the floating rod 10 and the arc block 12, connects the axial buffer structure and the radial buffer structure into one, and provides stable support for the radial buffer component when the axial movement is affected by the deformation of the bellows 13.

[0058] Floating rod 10: The overall description is a rod-shaped structure that can slide radially. Its position information is that it is slidably installed in the slide rail on the inner wall of the floating frame 9. One end is connected to the arc-shaped block 12, and the other end is constrained by the second spring 11. Its function is to serve as a connecting component between the arc-shaped block 12 and the floating frame 9, to transmit the radial force on the arc-shaped block 12, and to slide in the slide rail to adapt to the radial deformation of the bellows 13, thereby driving the second spring 11 to generate a buffering force.

[0059] The second spring 11 is generally described as a spiral elastic component, which is sleeved on the floating rod 10. One end of the spring is fixedly connected to the arc block 12, and the other end is fixedly connected to the inner wall of the slide of the floating frame 9. Its function is to push the arc block 12 to fit against the outer wall of the bellows 13 under normal conditions. When the bellows 13 undergoes radial displacement, it generates elastic force through compression or stretching to offset the radial impact force, while maintaining the stable clamping of the bellows 12 on the bellows 13.

[0060] Arc-shaped block 12: The overall description is a block-shaped component with an arc-shaped inner side. The arc-shaped surface is adapted to the outer wall of the bellows 13. The position information is installed on the inner side of the floating frame 9 through the floating rod 10. The four arc-shaped blocks 12 are closely attached to the outer wall of the bellows 13. Function: Increase the contact area with the outer wall of the bellows 13. Under the action of the second spring 11, the bellows 13 is uniformly clamped. This ensures radial support for the bellows 13 and allows it to move synchronously with its radial deformation, avoiding excessive local stress that could damage the bellows 13.

[0061] Bellows 13: The overall description is a flexible tubular component that can extend and contract axially and bend radially. It is usually made of metal or composite material. Its two ends are fixedly connected to the outlet flange 7 and the inlet flange 14, respectively. It is surrounded by a floating frame 9 and an arc block 12. Its function is to serve as a flexible channel for fuel gas transmission. It avoids stress damage caused by rigid connection by compensating for axial, radial and angular displacement caused by vibration and thermal expansion and contraction through its own deformation compensation device, while ensuring the continuous transmission of fuel gas.

[0062] Inlet flange 14: The overall description is a disc-shaped flange structure with a connection hole. One end is fixedly connected to the end of the bellows 13, and the other end is connected to the flange of the connecting pipe 15 through the fastening bolt 8. Function: It serves as a connecting transition component between the bellows 13 and the connecting pipe 15, realizing the transmission of fuel gas from the bellows 13 to the connecting pipe 15. At the same time, the flange connection ensures the sealing and connection strength of this part.

[0063] Connecting pipe 15: The overall description is a rigid tubular structure with flanges or flat interfaces at both ends. One end is connected to the bellows 13 via the air inlet flange 14, and the other end is connected to the gas pipeline 18. The outside is clamped with pipe clamp 16 at the connection point. Function: It serves as an intermediate channel for fuel gas transmission, transporting gas from the gas pipeline 18 to the bellows 13, while providing rigid support for the connection at both ends to ensure the smooth transmission path.

[0064] Pipe clamp 16: The overall description is an openable and closable ring-shaped clamping component, usually composed of two semi-circular structures. The position information is snapped onto the outer wall of the joint between the connecting pipe 15 and the gas pipe 18, and locked by quick-release bolts 17. Function: By clamping the outer walls of the two pipes, it enhances the overall rigidity of the joint between the connecting pipe 15 and the gas pipe 18, prevents the end face separation caused by vibration, and further improves the sealing reliability of this part in conjunction with the sealing ring 6.

[0065] Quick-release bolt 17: The general description is a bolt with a butterfly or easy-to-operate head. The position information runs through both ends of the pipe clamp 16. It is used to lock the pipe clamp 16. Its function is to achieve the clamping action of the pipe clamp 16 by quick tightening, which facilitates installation and disassembly, shortens the maintenance or replacement time of parts, and at the same time ensures the clamping force of the pipe clamp 16 on the pipe.

[0066] Gas pipeline 18: The overall description is a rigid tubular structure for transporting fuel gas. One end of it is connected to the end face of the connecting pipeline 15 through a sealing ring 6. The outer wall of the connection is clamped by a pipe clamp 16. Its function is to serve as the source pipeline for transporting fuel gas, transporting external fuel gas to the connecting pipeline 15, and providing a fuel gas source for the entire device.

[0067] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A modular connection device for a flexible fuel gas connection in a heating furnace, comprising a furnace body (1), characterized in that: A support base (2) is fixedly installed on the side of the furnace body (1). An inlet end (5) is fixedly installed on the support base (2). A sealing ring (6) is tightly attached to the flange end face of the inlet end (5). The end face of the outlet flange (7) is tightly attached to the side of the sealing ring (6) away from the inlet end (5). The flange of the inlet end (5) and the outlet flange (7) are fixedly connected by four fastening bolts (8). A bellows (13) is fixedly installed at the other end of the outlet flange (7). Four dampers (3) are distributed circumferentially along the axial direction of the corrugated pipe (13) on the support base (2). The fixed end of the damper (3) is connected to the support base (2), and the telescopic end faces away from the furnace body (1). A first spring (4) is sleeved on the outside of each damper (3). One end of the first spring (4) is fixedly connected to the support base (2), and the other end is fixedly connected to the floating frame (9). The telescopic end of the damper (3) is fixedly connected to the floating frame (9). The floating frame (9) has a rectangular ring structure and is sleeved on the outside of the corrugated pipe (13). The inner wall of the floating frame (9) has four slides distributed radially. A floating rod (10) is slidably installed in each slide. An arc block (12) is fixedly installed at one end of the floating rod (10) that extends radially and is close to the corrugated pipe (13). A second spring (11) is sleeved on each floating rod (10). One end of the second spring (11) is fixedly connected to the arc block (12), and the other end is fixedly connected to the inner wall of the slide of the floating frame (9). The inner surfaces of the four arc blocks (12) are closely attached to the outer wall of the corrugated pipe (13). An air inlet flange (14) is fixedly installed at the other end of the bellows (13). Another sealing ring (6) is tightly attached to the end face of the air inlet flange (14) away from the bellows (13). The side of the sealing ring (6) away from the air inlet flange (14) is tightly attached to the flange end face of the connecting pipe (15). The air inlet flange (14) and the flange of the connecting pipe (15) are fixedly connected by four other fastening bolts (8). Another sealing ring (6) is tightly attached to the end face of the connecting pipe (15) away from the inlet flange (14). The end face of the gas pipe (18) is tightly attached to the side of the sealing ring (6) away from the connecting pipe (15). A pipe clamp (16) is snapped onto the outer wall of the joint between the connecting pipe (15) and the gas pipe (18). The pipe clamp (16) is locked by quick-release bolts (17) to hold the outer walls of the two pipes tightly.

2. The modular connection device for a flexible fuel gas connection in a heating furnace according to claim 1, characterized in that: The four dampers (3) are evenly distributed along the circumference of the support (2), and the included angle between adjacent dampers (3) is a right angle.

3. The modular connection device for a flexible fuel gas connection in a heating furnace according to claim 2, characterized in that: The axis of the first spring (4) is collinear with the axis of the damper (3), and the first spring (4) is in a pre-compressed state.

4. The modular connection device for a flexible fuel gas connection in a heating furnace according to claim 3, characterized in that: There is a gap between the inner wall of the rectangular ring structure of the floating frame (9) and the outer wall of the bellows (13), and the distance of the gap is greater than the maximum radial movement distance of the arc block (12).

5. The modular connection device for a flexible fuel gas connection in a heating furnace according to claim 4, characterized in that: The inner surfaces of the four arc blocks (12) are all arc surfaces adapted to the outer wall of the bellows (13), and the four arc blocks (12) together form a circular clamping space that matches the outer diameter of the bellows (13).

6. The modular connection device for a flexible fuel gas connection in a heating furnace according to claim 5, characterized in that: The sealing ring (6) between the air inlet flange (14) and the flange of the connecting pipe (15), and the sealing ring (6) between the connecting pipe (15) and the gas pipe (18) are both O-rings with a circular cross section.

7. The modular connection device for a flexible fuel gas connection in a heating furnace according to claim 6, characterized in that: The pipe clamp (16) includes an upper clamp body and a lower clamp body that are adapted to each other. The quick-release bolt (17) passes through the ends of the upper clamp body and the lower clamp body and is locked by a nut. The quick-release bolt (17) is a wing bolt.

8. A modular connection device for a flexible fuel gas connection in a heating furnace according to claim 7, characterized in that: The two ends of the bellows (13) are fixedly connected to the outlet flange (7) and the inlet flange (14) by welding, respectively, and the sealing surface of the weld is flush with the end face of the flange.

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