Thermal shock resistant furnace tube

Abstract

This application relates to a thermal shock resistant furnace tube, specifically in the technical field of furnace tube vibration resistance. It includes an adjustment box, a pipe, and a base plate. Two movable plates are slidably connected inside the adjustment box. Through holes are provided at each of the four corners of the top of the adjustment box, and connecting rods are slidably connected inside these through holes. Two connecting rods form a group, and the bottom ends of the connecting rods in the same group are fixedly connected to opposite sides of the top of the movable plates. This application utilizes a threaded engagement between an adjustment bolt and a threaded cap. Rotating the adjustment bolt pushes the extrusion block to move laterally inside the adjustment cylinder, thereby causing the movable blocks to slide synchronously. This allows the fixed rod and auxiliary telescopic rod to push the clamping plate to stably clamp pipes of different diameters. A buffer pad effectively reduces the rigid impact when the extrusion block contacts the movable block, while the hydraulic damping rod provides multi-directional buffering in both longitudinal and lateral directions when the pipe shifts due to thermal expansion and contraction or is subjected to external impact forces, thanks to its damping characteristics.

Description

Technical Field

[0001] This application relates to the field of furnace tube anti-vibration technology, and in particular to a thermal shock resistant furnace tube. Background Technology

[0002] In industries such as petrochemicals, metallurgy, and new material sintering, tubular furnaces are core heat treatment equipment. The furnace tubes inside need to withstand frequent and drastic temperature changes (thermal shock) caused by process requirements (such as start-up and shutdown, parameter adjustment) or equipment failure. Thermal shock generates huge alternating thermal stress inside the furnace tubes, which is one of the main causes of fatigue cracks, deformation, and even rupture failure of the furnace tubes. In the existing technology, the furnace tubes are generally supported by traditional rigid brackets or hangers. These structures usually fix the furnace tubes directly and rigidly to the surrounding building or equipment structure with bolts.

[0003] However, rigid connections cannot effectively buffer thermal stress when facing thermal shock conditions. When the temperature changes drastically, the furnace tube will undergo significant thermal expansion and contraction. Rigid supports will strongly constrain this displacement, preventing the thermal stress from being effectively released and dissipated. Ultimately, the stress will concentrate on the furnace tube wall and the support connection. Traditional supports mainly consider vertical gravity support and are insufficient in resisting multi-directional impact forces. At the same time, most fixed supports cannot be flexibly adjusted and are difficult to adapt to furnace tubes of different diameters or complex on-site installation spaces. To solve the above problems, a thermal shock resistant furnace tube is proposed. Utility Model Content

[0004] The purpose of this application is to provide a thermal shock resistant furnace tube with multi-directional thermal shock buffering function and flexible adjustment characteristics. It has the advantages of furnace tube support structure that can adapt to different pipe diameters and complex installation spaces, and solves the problems of rigid supports in the prior art that cannot buffer thermal stress, have insufficient resistance to multi-directional impact forces, and are difficult to adapt to different pipe diameters and complex installation spaces.

[0005] The thermal shock resistant furnace tube provided in this application adopts the following technical solution: it includes an adjustment box, a pipe and a base plate. The adjustment box has two movable plates slidably connected inside. The adjustment box has through holes at the four corners of the top. A connecting rod is slidably connected inside the through holes. Two connecting rods form a group. The bottom ends of the connecting rods in the same group are respectively fixedly connected to the opposite sides of the top of the movable plate. Two adjustment square tubes are fixedly connected between the connecting rods in the same group. The base plate is set at the bottom of the adjustment box. A threaded cap is fixedly connected to the inner side of the adjusting square tube. An adjusting bolt is threadedly connected inside the threaded cap. A pressing block is fixedly connected to the pushing end of the adjusting bolt. A movable block is slidably connected inside the adjusting square tube. The side of the pressing block overlaps the side of the movable block. A fixed rod and two auxiliary telescopic rods are fixedly connected to the side of the movable block. The fixed rod is located between the two auxiliary telescopic rods. A hydraulic damping rod is fixedly connected to one end of the fixed rod. A clamping plate is fixedly connected to one end of the hydraulic damping rod and one end of each of the two auxiliary telescopic rods. The pipe is located between the four clamping plates. A buffer pad is provided at the contact end between the pressing block and the movable block. By adopting the above technical solution, and by setting the threaded engagement between the adjusting bolt and the threaded cap, rotating the adjusting bolt can push the extrusion block to move laterally along the inside of the adjusting square tube, thereby driving the movable block to slide synchronously. This allows the fixed rod and the auxiliary telescopic rod to push the clamping plate to stably clamp pipes of different diameters. Among them, the buffer pad can effectively reduce the rigid impact when the extrusion block contacts the movable block, while the hydraulic damping rod can achieve multi-directional buffering in the longitudinal and lateral directions when the pipe is displaced due to thermal expansion and contraction or subjected to external impact force through its own damping characteristics. At the same time, in conjunction with the guiding and supporting role of the auxiliary telescopic rod, the absorption capacity of thermal shock stress can be further improved. Meanwhile, the sliding connection of the movable plate in the adjusting box allows the two sets of connecting rods to drive the adjusting square tube to perform horizontal position adjustment within a certain range, which can flexibly adapt to the layout requirements of different complex installation spaces and solve the limitations of traditional rigid supports in multi-scenario applications.

[0006] Preferably, two limiting frames are fixedly connected to opposite sides inside the adjusting square tube, and two sliders are fixedly connected to opposite sides of the movable block, with the sliders slidably connected within the limiting frames; By adopting the above technical solution and setting the sliding cooperation between the slider and the limit frame, the lateral movement trajectory of the moving block can be limited, which can prevent the moving block from shifting or getting stuck during the adjustment process.

[0007] Preferably, a sliding rod is fixedly connected inside the limiting frame, a sliding cylinder is fixedly connected inside the slider, the sliding cylinder is slidably connected to the surface of the sliding rod, a limiting spring is sleeved on the surface of the sliding rod, and the two ends of the limiting spring are respectively fixedly connected to the inner side of the limiting frame and the side of the slider. By adopting the above technical solution and setting the sliding cooperation between the slide bar and the slide cylinder, the stability and smoothness of the slider's movement within the limit frame can be further improved.

[0008] Preferably, the inner side of the adjusting square tube has a strip-shaped hole, the side of the movable block is fixedly connected to a pointer, the outer side of the strip-shaped hole has a scale line, and the pointer is slidably connected inside the strip-shaped hole; By adopting the above technical solution, and by setting the sliding cooperation between the pointer and the strip hole, along with the scale line on the outside, the displacement of the movable block in the adjustment tube can be displayed intuitively, which makes it easier to control the clamping force on the pipe and avoid it being too tight or too loose.

[0009] Preferably, a T-shaped limiting block is fixedly connected to one side of each of the two connecting rods, and a strip-shaped limiting frame is slidably connected to the surface of the two T-shaped limiting blocks; By adopting the above technical solution and setting a sliding fit structure between the T-shaped limiting block and the strip-shaped limiting frame, the movement direction of the connecting rod can be limited, and at the same time, the bending deformation resistance of the two sets of connecting rods can be improved.

[0010] Preferably, two fixed plates are fixedly connected inside the adjustment box, and a rotating rod is rotatably connected between the two fixed plates via bearings. Threaded rods are fixedly connected to both ends of the rotating rod. A threaded cylinder is fixedly connected inside the movable plate, and the threaded cylinder is threaded onto the surface of the threaded rod. A transmission rod is tightly nested inside the adjustment box via bearings. A worm gear is fixedly connected to the surface of the rotating rod, and a worm is fixedly connected to the surface of the transmission rod. The worm gear and the worm mesh with each other. One end of the transmission rod rotates through the side of the adjustment box and is fixedly connected to a knob. By adopting the above technical solution and setting the transmission structure inside the adjustment box, when the knob is turned, the transmission rod drives the worm to rotate synchronously. Through the meshing of the worm wheel and the worm, the worm wheel, the rotating rod and the threaded rod can be driven to rotate accordingly. Through the threaded cylinder and the threaded rod threaded connection, and through the limiting of the movable plate, the movable plate can be moved smoothly along the axial direction of the threaded rod under the limiting action of the fixed plate. Thus, the position of the furnace tube support can be adjusted to adapt to the thermal expansion requirements of the furnace tube under different working conditions.

[0011] Preferably, a fixed cylinder is fixedly connected to each of the four corners of the top of the base plate, and a movable rod is slidably connected inside the fixed cylinder. The top ends of the four movable rods are respectively fixedly connected to the four corners of the bottom of the adjustment box. By adopting the above technical solution and setting a sliding fit structure between the fixed cylinder and the movable rod, it is convenient for people to adjust the height of the device according to actual usage needs.

[0012] Preferably, the movable rod has multiple positioning holes on its surface, and the fixed cylinder is threaded with a positioning bolt, one end of which is threaded into the positioning hole. By adopting the above technical solution and setting a matching structure between the positioning hole and the positioning bolt, when the height of the device is adjusted to a suitable position, the positioning bolt can be screwed into the corresponding positioning hole to fix the relative position of the movable rod and the fixed cylinder, thus preventing the movable rod from sliding inside the fixed cylinder during use.

[0013] In summary, this application includes at least one of the following beneficial technical effects: This type of thermal shock resistant furnace tube, through the threaded engagement of the adjusting bolt and the threaded cap, allows the rotating adjusting bolt to push the extrusion block to move laterally along the inside of the adjusting square tube, thereby causing the movable block to slide synchronously. This enables the fixed rod and auxiliary telescopic rod to push the clamping plate to stably clamp pipes of different diameters. The buffer pad effectively reduces the rigid impact when the extrusion block contacts the movable block, while the hydraulic damping rod can achieve multi-directional buffering in both longitudinal and lateral directions when the pipe is displaced due to thermal expansion and contraction or subjected to external impact forces, through its own damping characteristics. At the same time, in conjunction with the guiding and supporting role of the auxiliary telescopic rod, it can further enhance the absorption capacity of thermal shock stress. In addition, the sliding connection of the movable plate in the adjusting box allows the two sets of connecting rods to drive the adjusting square tube to perform horizontal position adjustment within a certain range, which can flexibly adapt to the layout requirements of different complex installation spaces and solve the limitations of traditional rigid supports in multi-scenario applications. Attached Figure Description

[0014] Figure 1 This is a frontal three-dimensional structural diagram of this application; Figure 2 This is a structural schematic diagram of the pipeline installation state in this application; Figure 3 This is a structural schematic diagram of the cross-section of the adjustment box in this application; Figure 4 This is a schematic diagram of the worm gear structure in this application; Figure 5 This is a schematic diagram of the base plate in this application; Figure 6 This is a schematic diagram of the structure for adjusting the cross-section of the square tube in this application; Figure 7 This is a structural schematic diagram of the cross-section of the limiting frame in this application.

[0015] In the diagram: 1. Adjusting box; 101. Fixing plate; 102. Rotating rod; 103. Threaded rod; 104. Threaded cylinder; 105. Movable plate; 106. Worm gear; 107. Through hole; 108. Connecting rod; 109. T-shaped limit block; 1010. Strip-shaped limit frame; 1011. Transmission rod; 1012. Worm gear; 1013. Knob; 2. Pipe; 3. Base plate; 301. Fixing cylinder; 302. Movable rod; 303. Positioning hole; 304. 4. Positioning bolt; 4. Adjusting square tube; 401. Threaded cap; 402. Adjusting bolt; 403. Pressing block; 404. Moving block; 405. Fixed rod; 406. Hydraulic damping rod; 407. Clamping plate; 408. Auxiliary telescopic rod; 409. Strip hole; 4010. Scale line; 4011. Pointer; 4012. Limiting frame; 4013. Slide rod; 4014. Slider; 4015. Slide cylinder; 4016. Limiting spring; 4017. Buffer pad. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail below.

[0017] Example 1: A thermal shock resistant furnace tube, referring to... Figure 1 , Figure 3 , Figure 4 and Figure 5 The system includes an adjustment box 1, a pipe 2, and a base plate 3. The adjustment box 1 has two movable plates 105 slidably connected inside. Each of the four corners of the top of the adjustment box 1 has a through hole 107. A connecting rod 108 is slidably connected inside the through hole 107. Two connecting rods 108 form a group. The bottom ends of the two connecting rods 108 in the same group are fixedly connected to the opposite sides of the top of the movable plate 105. Two adjustment square tubes 4 are fixedly connected between the connecting rods 108 in the same group. The base plate 3 is set at the bottom of the adjustment box 1. A threaded cap 401 is fixedly connected to the inner side of the adjusting square tube 4. An adjusting bolt 402 is threadedly connected inside the threaded cap 401. A pressing block 403 is fixedly connected to the pushing end of the adjusting bolt 402. A movable block 404 is slidably connected inside the adjusting square tube 4. The side of the pressing block 403 overlaps the side of the movable block 404. A fixed rod 405 and two auxiliary telescopic rods 408 are fixedly connected to the side of the movable block 404. The fixed rod 405 is located between the two auxiliary telescopic rods 408. A hydraulic damping rod 406 is fixedly connected to one end of the fixed rod 405. A clamping plate 407 is fixedly connected to one end of the hydraulic damping rod 406 and one end of each of the two auxiliary telescopic rods 408. The pipe 2 is located between the four clamping plates 407. A buffer pad 4017 is provided at the contact end between the pressing block 403 and the movable block 404. By setting the threaded engagement between the adjusting bolt 402 and the threaded cap 401, rotating the adjusting bolt 402 can push the pressing block 403. 03 moves laterally inside the adjusting square tube 4, thereby driving the movable block 404 to slide synchronously. This allows the fixed rod 405 and the auxiliary telescopic rod 408 to push the clamping plate 407 to stably clamp pipes 2 of different diameters. Among them, the buffer pad 4017 can effectively reduce the rigid impact when the squeezing block 403 contacts the movable block 404, while the hydraulic damping rod 406 can achieve multi-directional buffering in the longitudinal and lateral directions when the pipe 2 is displaced due to thermal expansion and contraction or subjected to external impact force through its own damping characteristics. At the same time, in conjunction with the guiding and supporting role of the auxiliary telescopic rod 408, it can further improve the absorption capacity of thermal shock stress. Meanwhile, the sliding connection of the movable plate 105 in the adjusting box 1 allows the two sets of connecting rods 108 to drive the adjusting square tube 4 to perform a certain range of horizontal position adjustment, which can flexibly adapt to the layout requirements of different complex installation spaces and solve the limitations of traditional rigid supports in multi-scenario applications.

[0018] Please see Figure 6 and Figure 7 The adjusting square tube 4 has two fixed limiting frames 4012 on opposite sides. The movable block 404 has two fixed sliders 4014 on opposite sides. The sliders 4014 are slidably connected within the limiting frames 4012. By setting the sliding cooperation between the sliders 4014 and the limiting frames 4012, the lateral movement trajectory of the movable block 404 can be limited, preventing the movable block 404 from shifting or jamming during adjustment. A sliding rod 4013 is fixedly connected inside the limiting frame 4012. A sliding cylinder 4015 is fixedly connected inside the slider 4014. The sliding cylinder 4015 is slidably connected to the surface of the sliding rod 4013. A limiting spring 4016 is sleeved on the surface of the sliding rod 4013. The two ends of the limiting spring 4016 are fixedly connected to the limiting frame 4012. 2. The inner side and the side of the slider 4014 are equipped with a sliding rod 4013 and a sliding cylinder 4015. This can further improve the stability and smoothness of the slider 4014 moving within the limit frame 4012 and prevent shaking caused by excessive gaps. The inner side of the adjusting square tube 4 has a strip hole 409. A pointer 4011 is fixedly connected to the side of the movable block 404. A scale line 4010 is provided on the outside of the strip hole 409. The pointer 4011 is slidably connected in the strip hole 409. By setting the sliding cooperation between the pointer 4011 and the strip hole 409, and in conjunction with the scale line 4010 on the outside, the displacement of the movable block 404 in the adjusting square tube 4 can be displayed intuitively, which is convenient for controlling the clamping force on the pipe 2 and avoiding being too tight or too loose.

[0019] Please see Figure 2 and Figure 4 Each of the two connecting rods 108 is fixedly connected to one side with a T-shaped limiting block 109. A strip-shaped limiting frame 1010 is slidably connected to the surface of the two T-shaped limiting blocks 109. By setting the sliding fit structure between the T-shaped limiting block 109 and the strip-shaped limiting frame 1010, the movement direction of the connecting rod 108 can be limited. At the same time, the bending deformation resistance of the two sets of connecting rods 108 can also be improved.

[0020] Please see Figure 1 , Figure 3 and Figure 4The adjusting box 1 has two fixed plates 101 fixedly connected inside. A rotating rod 102 is rotatably connected between the two fixed plates 101 via bearings. Threaded rods 103 are fixedly connected to both ends of the rotating rod 102. A threaded cylinder 104 is fixedly connected inside the movable plate 105, and the threaded cylinder 104 is threaded onto the surface of the threaded rod 103. A transmission rod 1011 is tightly nested inside the adjusting box 1 via bearings. A worm gear 106 is fixedly connected to the surface of the rotating rod 102, and a worm 1012 is fixedly connected to the surface of the transmission rod 1011. The worm gear 106 and the worm 1012 mesh with each other. One end of the transmission rod 1011 rotates through the side of the adjusting box 1. A knob 1013 is fixedly connected. By setting the transmission structure inside the adjustment box 1, when the knob 1013 is rotated, the transmission rod 1011 drives the worm gear 1012 to rotate synchronously. The worm wheel 106 meshes with the worm gear 1012, which can drive the worm wheel 106, the rotating rod 102 and the threaded rod 103 to rotate accordingly. The threaded cylinder 104 is threadedly connected to the threaded rod 103, and the movable plate 105 limits the movement of the movable plate 105 along the axial direction of the threaded rod 103 under the limiting action of the fixed plate 101. This allows for the adjustment of the furnace tube support position and can adapt to the thermal expansion requirements of the furnace tube under different working conditions.

[0021] Please see Figure 1 and Figure 5 The base plate 3 has four fixed cylinders 301 fixedly connected to the top corners of each of its four corners. Movable rods 302 are slidably connected inside the fixed cylinders 301. The tops of the four movable rods 302 are fixedly connected to the bottom corners of the adjustment box 1. By setting a sliding fit structure between the fixed cylinders 301 and the movable rods 302, it is easy for people to adjust the height of the device according to actual usage needs. Multiple positioning holes 303 are opened on the surface of the movable rods 302. Positioning bolts 304 are threadedly connected to the surface of the fixed cylinders 301. One end of the positioning bolts 304 is threaded into the positioning holes 303. By setting a fit structure between the positioning holes 303 and the positioning bolts 304, when the height of the device is adjusted to a suitable position, the positioning bolts 304 are screwed into the corresponding positioning holes 303 to fix the relative position of the movable rods 302 and the fixed cylinders 301, which can prevent the movable rods 302 from sliding inside the fixed cylinders 301 during use.

[0022] The implementation principle of this application embodiment is as follows: During actual installation, firstly, according to the height of the installation space, adjust the extension length of the movable rod 302 in the fixed cylinder 301, align the positioning hole 303 and tighten the positioning bolt 304 to complete the height fixation; Next, turn the knob 1013, which drives the rotating rod 102 and the threaded rod 103 to rotate via the transmission rod 1011, worm 1012, and worm wheel 106. The threaded connection between the threaded cylinder 104 and the threaded rod 103 allows the movable plate 105 to move the adjusting square cylinder 4 to a suitable position in the horizontal direction via the connecting rod 108. Then, according to the pipe diameter of pipe 2, rotate the adjusting bolt 402, and push the squeezing block 403 to move through the cooperation of the threaded cap 401, so that the movable block 404 drives the fixed rod 405, the auxiliary telescopic rod 408 and the clamping plate 407 to initially clamp pipe 2. At the same time, observe the scale line 4010 pointed to by the pointer 4011 at the strip hole 409 to ensure that the clamping force is appropriate. When pipeline 2 is displaced due to thermal shock during operation, the hydraulic damping rod 406 absorbs longitudinal and lateral stress through its own damping characteristics. At the same time, the structure can be kept stable through the cooperation of the auxiliary telescopic rod 408. When pipeline 2 undergoes thermal expansion, the impact of thermal stress on pipeline 2 and supporting structure can be offset by the buffering effect of the hydraulic damping rod 406, thus achieving dynamic thermal shock protection for the furnace tube.

Claims

1. A thermal shock resistant furnace tube, comprising an adjustment box (1), a pipe (2), and a base plate (3), characterized in that: The adjustment box (1) has two movable plates (105) slidably connected inside. The adjustment box (1) has through holes (107) at the four corners of the top. The through holes (107) have connecting rods (108) slidably connected inside. The two connecting rods (108) form a group. The bottom ends of the connecting rods (108) in the same group are fixedly connected to the opposite sides of the top of the movable plates (105). The connecting rods (108) in the same group are fixedly connected to two adjustment square tubes (4). The bottom plate (3) is set at the bottom of the adjustment box (1). A threaded cap (401) is fixedly connected to the inner side of the adjusting square tube (4). An adjusting bolt (402) is threadedly connected inside the threaded cap (401). A pressing block (403) is fixedly connected to the pushing end of the adjusting bolt (402). A movable block (404) is slidably connected inside the adjusting square tube (4). The side of the pressing block (403) overlaps the side of the movable block (404). A fixing rod (405) and two auxiliary rods are fixedly connected to the side of the movable block (404). The telescopic rod (408) is located between the two auxiliary telescopic rods (408). One end of the fixed rod (405) is fixedly connected to a hydraulic damping rod (406). One end of the hydraulic damping rod (406) and one end of the two auxiliary telescopic rods (408) are both fixedly connected to clamping plates (407). The pipe (2) is located between the four clamping plates (407). The end of the squeezing block (403) and the movable block (404) is provided with a buffer pad (4017).

2. The thermal shock resistant furnace tube according to claim 1, characterized in that: The adjusting square tube (4) has two fixedly connected limit frames (4012) on both sides inside, and the movable block (404) has two fixedly connected sliders (4014) on both sides. The sliders (4014) are slidably connected inside the limit frames (4012).

3. The thermal shock resistant furnace tube according to claim 2, characterized in that: The limiting frame (4012) is fixedly connected to a slide rod (4013), and the slider (4014) is fixedly connected to a slide cylinder (4015). The slide cylinder (4015) is slidably connected to the surface of the slide rod (4013). A limiting spring (4016) is sleeved on the surface of the slide rod (4013). The two ends of the limiting spring (4016) are fixedly connected to the inner side of the limiting frame (4012) and the side of the slider (4014), respectively.

4. The thermal shock resistant furnace tube according to claim 1, characterized in that: The inner side of the adjusting square tube (4) is provided with a strip hole (409), and a pointer (4011) is fixedly connected to the side of the movable block (404). A scale line (4010) is provided on the outside of the strip hole (409), and the pointer (4011) is slidably connected in the strip hole (409).

5. The thermal shock resistant furnace tube according to claim 1, characterized in that: T-shaped limiting blocks (109) are fixedly connected to one side of each of the two connecting rods (108), and strip-shaped limiting frames (1010) are slidably connected to the surfaces of the two T-shaped limiting blocks (109).

6. The thermal shock resistant furnace tube according to claim 1, characterized in that: The adjustment box (1) has two fixed plates (101) fixedly connected inside. A rotating rod (102) is rotatably connected between the two fixed plates (101) through a bearing. Threaded rods (103) are fixedly connected to both ends of the rotating rod (102). A threaded cylinder (104) is fixedly connected inside the movable plate (105). The threaded cylinder (104) is threadedly connected to the surface of the threaded rod (103). A transmission rod (1011) is tightly nested inside the adjustment box (1) through a bearing. A worm gear (106) is fixedly connected to the surface of the rotating rod (102). A worm (1012) is fixedly connected to the surface of the transmission rod (1011). The worm gear (106) and the worm (1012) mesh with each other. One end of the transmission rod (1011) rotates through the side of the adjustment box (1) and is fixedly connected to a knob (1013).

7. The thermal shock resistant furnace tube according to claim 1, characterized in that: The base plate (3) has four fixed cylinders (301) fixedly connected to the top corners. The fixed cylinders (301) have movable rods (302) slidably connected inside. The top ends of the four movable rods (302) are fixedly connected to the four bottom corners of the adjustment box (1).

8. The thermal shock resistant furnace tube according to claim 7, characterized in that: The movable rod (302) has multiple positioning holes (303) on its surface, and the fixed cylinder (301) is threaded with a positioning bolt (304), one end of which is threaded into the positioning hole (303).

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