Limiting structure of flue

Abstract

The utility model relates to the field of waste heat utilization boilers in the industrial and mining industry, and discloses a flue limiting structure which comprises a limiting device and a hinge device, the top end of the limiting device is fixedly connected with a mounting frame, and the bottom end of the limiting device vertically extends into a crack between an inlet flue and an outlet flue; the hinge device is located on the edge of the crack, and the two ends of the hinge device are fixedly connected with the inlet flue and the outlet flue correspondingly. And the inlet flue and the outlet flue can freely expand under the action of the hinge device by taking the limiting device as the center. According to the utility model, the free expansion degree of the flue gas channel is not influenced, and the connection stability of the flue gas channel can be ensured.

Description

Technical Field

[0001] The utility model relates to the field of waste heat utilization boilers in industrial and mining industries, and in particular to a flue limiting structure. Background Art

[0002] The waste heat utilization boiler in the industrial and mining industry is characterized by a small overall structure and compact layout. The inlet and outlet flue gas channels of the boiler are arranged at the same height. When the flue gas passes through, the temperature difference between the inside and outside of the flue gas channel will cause the flue gas channel to expand outward, resulting in changes in the installation position and structure of the flue gas channel. If it is not restricted, it will affect the connection stability of the flue gas channel, and even cause serious safety accidents in severe cases. However, if the flue gas channel is fixed in all directions, it is bound to be squeezed when it expands, which will seriously affect its free expansion degree, affect the performance of the flue gas channel itself, and reduce its service life. Therefore, it is urgent to set a limit structure between the inlet and outlet flue gas channels, which will not affect the free expansion degree of the flue gas channel itself, but can ensure the connection stability of the flue gas channel. Utility Model Content

[0003] In order to overcome the problems in the above-mentioned background technology, the utility model provides a flue limiting structure, which will not affect the free expansion degree of the smoke channel itself, and can ensure the stability of the smoke channel.

[0004] The technical solution of the utility model is as follows:

[0005] A flue limiting structure comprises a limiting device and a hinge device, wherein the top end of the limiting device is fixedly connected to a mounting frame, and the bottom end vertically extends into a gap between an inlet flue and an outlet flue; the hinge device is located at the edge of the gap, and its two ends are respectively fixedly connected to the inlet flue and the outlet flue; the inlet flue and the outlet flue can expand freely under the action of the hinge device with the limiting device as the center.

[0006] Compared with the prior art, the beneficial effects of this technical solution are:

[0007] By arranging a limiting structure at the gap between the inlet flue and the outlet flue, the inlet flue and the outlet flue can expand freely without changing their installation positions, wherein the limiting device arranged in the gap allows the inlet flue and the outlet flue to expand freely in the circumferential direction with the limiting device as the center, and also limits the movement range of the two, thereby ensuring the connection stability of the smoke channel, and by arranging a hinge device at the edge of the gap, the inlet flue and the outlet flue are connected, and the moving positions of the two are mutually restricted, thereby further improving the overall connection stability of the smoke channel, and the hinge device does not fix the inlet flue and the outlet flue, and the two can also move freely around the hinge device without limiting the free expansion of the two.

[0008] Preferably, the limiting device is fixedly connected to the mounting frame via an I-beam.

[0009] The beneficial effect is that the limit device is connected through the I-beam, which ensures the stability of the connection.

[0010] Preferably, the limiting device is a rectangular tubular structure, and extends into the gap from the expansion zero point of the top surfaces of the inlet flue and the outlet flue.

[0011] The beneficial effect is that the limiting device is a rectangular tubular structure, which is not only easier to insert into the gap, but also more conducive to the uniform force of the limiting device when the inlet and outlet flues expand. The limiting device extends from the expansion zero point of the inlet and outlet flues, and can expand evenly around this point as the center, avoiding the situation of uneven expansion.

[0012] Further preferably, symmetrical limit blocks are fixed to the top surfaces of the inlet flue and the outlet flue respectively, and the two limit blocks are put together to form a limit channel, and the limit device passes through the limit channel and is circumferentially matched with the limit channel gap.

[0013] Its beneficial effect is that a gap is left in the limiting channel formed by the limiting device in the circumference and the limiting block, so that the inlet flue and the outlet flue will not contact the limiting device when expanding, thereby preventing the inlet flue and the outlet flue from contacting the limiting device when the inlet flue and the outlet flue expand horizontally, thereby limiting their free expansion in the vertical direction.

[0014] Preferably, the hinge device includes two mounting plates respectively connected to the inlet flue and the outlet flue, the two mounting plates are vertically fixed to the connecting surface, and a pin hole is provided on the side close to the gap, two pin shafts pass through the pin holes and are vertically connected to the mounting plates respectively, and the front and rear sides of the two mounting plates are respectively provided with connecting plates that are simultaneously mounted on the pin shafts of the two mounting plates, and the mounting plates can rotate freely with the pin shaft as the center.

[0015] The beneficial effect is that: through this hinge device, the inlet flue and the outlet flue can be connected to limit the movement range of the two to avoid excessive movement affecting stability, and the two can be rotated around the pin shaft as the center and expanded freely.

[0016] Further preferably, the outer side of the connecting piece is further provided with a limiting sleeve fixed on the pin shaft to limit the moving position of the mounting piece and the connecting piece.

[0017] The beneficial effect is that the limiting sleeve can limit the movement range of the installation plate and the connecting plate on the pin shaft, thereby preventing them from falling off the pin shaft and affecting the connection stability of the hinge device.

[0018] Further preferably, the gap is arranged with a plurality of hinge devices along its top from front to back, and the two sides of each hinge device are respectively fixedly connected to the top surfaces of the inlet flue and the outlet flue; the gap is arranged with a plurality of hinge devices along its two sides from top to bottom in sequence, and the two sides of each hinge device are respectively fixedly connected to the side surfaces of the inlet flue and the outlet flue.

[0019] The beneficial effect is that by arranging a plurality of hinge devices at the top and front and rear sides of the gap to connect the inlet flue and the outlet flue, the connection stability between the two is further improved, and the free expansion of the two is not affected.

[0020] Further preferably, the spacing distance between adjacent hinge devices at the top or side of the gap is in the range of 2-4 meters.

[0021] The beneficial effect is that if the distance range is too large, the difference in expansion between the inlet flue and the outlet flue at the same position will be too large, and the hinge reserved gap needs to be increased. If the pin shaft diameter increases accordingly, it will be easily broken due to shear force. If the distance range is too small, the free expansion of the inlet flue and the outlet flue will be restricted.

[0022] Preferably, the width of the gap is greater than the sum of the inward expansion degrees of the inlet flue and the outlet flue.

[0023] The beneficial effect is to avoid affecting the free inward expansion of the inlet and outlet flues.

[0024] Preferably, the inlet flue and the outlet flue are suspended below the mounting frame via a suspension rod.

[0025] The beneficial effect is that the inlet flue and the outlet flue can be more easily fixedly connected to the mounting frame by arranging the suspension rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described with reference to the accompanying drawings, in which:

[0027] Figure 1 It is a side view of the inlet flue and the outlet flue of the utility model;

[0028] Figure 2 It is a top view of the inlet flue and the outlet flue of the utility model;

[0029] Figure 3 This is a schematic diagram of the connection structure of the limit device of the utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the hinge device of the utility model;

[0031] Figure 5 It is a top view of the hinge device of the utility model installed on the side of the inlet flue and the outlet flue;

[0032] Figure 6 This is a front view of the hinge device of the utility model installed on the top surface of the inlet flue and the outlet flue.

[0033] Figure numerals: limit device 1, limit block 11, limit channel 12, hinge device 2, mounting plate 21, pin shaft 22, connecting plate 23, limit sleeve 24, mounting frame 3, I-beam 31, suspension rod 32, inlet flue 41, outlet flue 42, gap 43. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] Example 1: Figures 1 to 6 The limiting structure of a flue shown in the figure includes a limiting device 1 and a hinge device 2. The top of the limiting device 1 is fixedly connected to the mounting frame 3 of the boiler through an I-beam 31. The connection through the I-beam 31 ensures the stability of the limiting device 1. The boiler as a whole is connected and fixed through the mounting frame 3. The mounting frame 3 is a steel frame. The inlet flue 41 and the outlet flue 42 are suspended and fixed on both sides below the mounting frame 3 through the suspension rod 32 respectively. The provision of the suspension rod 32 makes it easier to fix the inlet flue 41 and the outlet flue 42 to the mounting frame 3. The inlet flue 41 and the outlet flue 42 are kept at the same height, and a gap 43 is left between the two. The width of the gap 43 is greater than the sum of the expansion degrees of the inlet flue 41 and the outlet flue 42, that is, the width of the gap 43 left cannot limit the free expansion of the inlet flue 41 and the outlet flue 42 inward. The bottom end of the limiting device 1 extends vertically downward from the top of the inlet flue 41 and the outlet flue 42 into the gap 43. The hinge device 2 is arranged at the edge of the gap 43, and its two ends are fixedly connected to the inlet flue 41 and the outlet flue 42 respectively, so that the inlet flue 41 and the outlet flue 42 can expand freely under the action of the hinge device 2 with the limiting device 1 as the center.

[0036] By setting a limiting structure at the gap 43 between the inlet flue 41 and the outlet flue 42, the inlet flue 41 and the outlet flue 42 can expand freely without changing their installation positions, wherein the limiting device 1 is set in the gap 43, so that when the inlet flue 41 and the outlet flue 42 expand, they can expand freely in the circumferential direction with the limiting device 1 as the center, and the movement range of the two is also limited, thereby ensuring the connection stability of the smoke channel, and by setting a hinge device 2 at the edge position of the gap 43, the inlet flue 41 and the outlet flue 42 are connected, and the two limit the movement position of each other, thereby further improving the overall connection stability of the smoke channel, and the hinge device 2 does not fix the inlet flue 41 and the outlet flue 42, and the two can also move freely around the hinge device 2 without limiting the free expansion of the two.

[0037] Embodiment 2: Based on the embodiment 1, the limiting device 1 is optimally designed, such as Figure 3 As shown, the limiting device 1 is a rectangular tubular structure, which is easier to insert into the gap 43 and is more conducive to the uniform force of the limiting device 1 when the inlet flue 41 and the outlet flue 42 expand. The limiting device 1 extends into the gap 43 from the expansion zero point of the top surface of the inlet flue 41 and the outlet flue 42. The expansion zero point is the center point of the top surface of the gap 43. The limiting device 1 is set at this position, and the inlet flue 41 and the outlet flue 42 can expand uniformly around this point to avoid uneven expansion.

[0038] Furthermore, symmetrical limit blocks 11 are fixed to the top surfaces of the inlet flue 41 and the outlet flue 42 respectively, and the opposite surfaces of the two limit blocks 11 are recessed inward to form a recessed portion. When the limit blocks 11 are put together, the recessed portions form a limit channel 12. The limit channel 12 cooperates with the circumference of the limit device 1. The limit device 1 passes through the limit channel 12 and enters the gap 43, and a gap is left between the circumference and the inner wall of the limit channel 12. By setting a gap between the circumference of the limit device 1 and the limit channel 12 formed by the limit blocks 11, the inlet flue 41 and the outlet flue 42 will not contact the limit device 1 when expanding, thereby avoiding the inlet flue 41 and the outlet flue 42 from contacting the limit device 1 when the horizontal expansion contacts the limit device 1, thereby limiting the free expansion degree in the vertical direction.

[0039] Embodiment 3: Based on Embodiment 1, the hinge device 2 is optimally designed. Figures 4 to 6As shown, the hinge device 2 includes two mounting pieces 21 with relative mounting positions, the two mounting pieces 21 are respectively fixedly connected to the outer surface of the inlet flue 41 and the outer surface of the outlet flue 42 on both sides of the gap 43, and are perpendicular to the connecting surface, a pin hole is respectively provided on one side of the two mounting pieces 21 close to the gap 43, and two pin shafts 22 respectively pass through the pin holes and are vertically connected to the mounting pieces 21, and a connecting piece 23 which is simultaneously sleeved on the pin shafts 22 of the two mounting pieces 21 is respectively provided on the front and rear sides of the two mounting pieces 21, and a limiting sleeve 24 fixed on the pin shaft 22 is also provided on the outer side of the connecting piece 23, and the limiting sleeve 24 is respectively fixed to the front and rear ends of the pin shaft 22, and its diameter is larger than the pin hole diameter of both the mounting piece 21 and the connecting piece 23, so as to limit the moving range of the mounting piece 21 and the connecting piece 23 on the pin shaft 22, and avoid falling off from the pin shaft 22, which affects the connection stability of the hinge device 2. The connecting piece 23 connects the two mounting pieces 21, and the inlet flue 41 and the outlet flue 42 on both sides of the gap 43 are connected together. Since the pin shaft 22 passes through the pin hole in the middle of the mounting piece 21, the mounting piece 21 can rotate freely around the pin shaft 22. Therefore, through this hinge device 2, the inlet flue 41 and the outlet flue 42 can be connected to limit the movement range of the two to avoid the stability affected by excessive movement, and the two can rotate around the pin shaft 22 and expand freely.

[0040] Furthermore, a plurality of hinge devices 2 are arranged from front to back at the top of the slit 43, and the mounting pieces 21 on both sides of each hinge device 2 are respectively vertically fixedly connected to the top surface of the inlet flue 41 and the top surface of the outlet flue 42, so that the top of the inlet flue 41 and the outlet flue 42 can expand upward freely; a plurality of hinge devices 2 are arranged from top to bottom at the front and rear sides of the slit 43, and the mounting pieces 21 on both sides of each hinge device 2 are respectively vertically fixedly connected to the side surface of the inlet flue 41 and the side surface of the outlet flue 42, so that the sides of the inlet flue 41 and the outlet flue 42 can expand outward freely. By respectively arranging a plurality of hinge devices 2 at the top and front and rear sides of the slit 43 to connect the inlet flue 41 and the outlet flue 42, the connection stability between the two is further improved, and the free expansion of the two is not affected.

[0041] Furthermore, the distance range between adjacent hinge devices 2 arranged at the top of the gap 43 and the distance range between adjacent hinge devices 2 arranged at the front and rear sides of the gap 43 are both 2-4 meters. If the distance range is too large, the difference in expansion degree between different positions of the inlet flue 41 and the outlet flue 42 will be too large, and the hinge reserved gap needs to be increased. If the diameter of the pin shaft 22 is increased accordingly, it will be easily broken due to shear force. If the distance range is too small, the free expansion of the inlet flue 41 and the outlet flue 42 will be restricted.

[0042] The above embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A flue limiting structure, characterized in that: The invention comprises a limit device (1) and a hinge device (2); the top end of the limit device (1) is fixedly connected to a mounting frame (3), and the bottom end of the limit device (1) vertically extends into a gap (43) between an inlet flue (41) and an outlet flue (42); the hinge device (2) is located at the edge of the gap (43), and its two ends are respectively fixedly connected to the inlet flue (41) and the outlet flue (42); the inlet flue (41) and the outlet flue (42) can freely expand under the action of the hinge device (2) with the limit device (1) as the center.

2. A flue limiting structure according to claim 1, characterized in that: The limiting device (1) is fixedly connected to the mounting frame (3) via an I-beam (31).

3. A flue limiting structure according to claim 1, characterized in that: The limiting device (1) is a rectangular tubular structure and extends into the gap (43) from the expansion zero point of the top surfaces of the inlet flue (41) and the outlet flue (42).

4. A flue limiting structure according to claim 1 or claim 3, characterized in that: Symmetrical limit blocks (11) are fixed to the top surfaces of the inlet flue (41) and the outlet flue (42), respectively. The two limit blocks (11) are put together to form a limit channel (12). The limit device (1) passes through the limit channel (12) and is clearance-matched with the limit channel (12) in the circumferential direction.

5. The flue limiting structure according to claim 1, characterized in that: The hinge device (2) comprises two mounting plates (21) respectively connected to the inlet flue (41) and the outlet flue (42); the two mounting plates (21) are vertically fixed to the connection surface, and a pin hole is provided on one side close to the gap (43); two pin shafts (22) respectively pass through the pin holes and are vertically connected to the mounting plates (21); the front and rear sides of the two mounting plates (21) are respectively provided with connecting plates (23) which are simultaneously sleeved on the pin shafts (22) of the two mounting plates (21); and the mounting plates (21) can rotate freely around the pin shaft (22).

6. A flue limiting structure according to claim 5, characterized in that: A limiting sleeve (24) fixed on the pin shaft (22) is also provided on the outer side of the connecting piece (23), and the limiting sleeve (24) limits the moving positions of the mounting piece (21) and the connecting piece (23).

7. A flue limiting structure according to claim 1 or claim 5, characterized in that: The slit (43) is provided with a plurality of hinge devices (2) along its top from front to back, and the two sides of each hinge device (2) are respectively fixedly connected to the top surface of the inlet flue (41) and the outlet flue (42); the slit (43) is provided with a plurality of hinge devices (2) along its two sides from top to bottom, and the two sides of each hinge device (2) are respectively fixedly connected to the side surface of the inlet flue (41) and the outlet flue (42).

8. A flue limiting structure according to claim 7, characterized in that: The spacing distance between adjacent hinge devices (2) at the top or side of the gap (43) ranges from 2 to 4 meters.

9. The flue limiting structure according to claim 1, characterized in that: The width of the gap (43) is greater than the sum of the inward expansion degrees of the inlet flue (41) and the outlet flue (42).

10. The flue limiting structure according to claim 1, characterized in that: The inlet flue (41) and the outlet flue (42) are suspended below the mounting frame (3) via a suspension rod (32).

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