Assembly wallboard type square steel chimney

Abstract

The invention relates to the technical field of power transmission equipment, in particular to an assembled wallboard type square steel chimney, and solves the technical problem of backward flowing caused by internal negative pressure or external airflow during chimney exhaust. The chimney mainly comprises a chimney body, a flue allowing flue gas to penetrate through is formed in the chimney body, the intercepting pipe is arranged on the chimney body, an intercepting cavity is formed in the intercepting pipe, and the two ends of the intercepting cavity communicate with the flue; the intercepting assembly comprises an intercepting plate, a first partition plate and an inflating and releasing part, the intercepting plate is arranged on the inner wall of the outlet of the intercepting cavity, the first partition plate is slidably connected into the intercepting cavity in the direction perpendicular to the flue, and the inflating part and the releasing part are both in transmission connection with the first partition plate. Collection of part of flue gas in the chimney is completed through the intercepting assembly, the flue gas in the intercepting pipe forms exhaust gas flow and part of backflow gas flow, extrusion of backflow gas flow and reduction of the flow speed in the chimney are completed, and the problem of negative pressure or backflow is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of exhaust equipment, and particularly relates to an assembled wallboard type square steel chimney. BACKGROUND

[0002] The square steel chimney is suitable for the fields of building and industry, and is formed by welding modular square steel pipes made of galvanized steel plates and the like, and then assembled by flange connection to form a well-sealed ventilation air duct, and is provided with a gas furnace and the like at the bottom.

[0003] Due to heat dissipation of high-temperature gas inside the chimney, the internal gas changes in pressure due to temperature, and at the same time, when the flue gas moves, the high-movement flue gas further separates from the bottom flue gas, causing negative pressure at the bottom, which easily causes the combustion side to lack air, resulting in insufficient combustion. The existing solution is to complete internal air drainage by using an air extractor to ensure sufficient suction under negative pressure. However, during air extraction, the wind speed is easily further increased, causing a huge negative pressure at the bottom of the chimney, which easily causes backflow, and the fluctuating air flow easily causes unstable combustion in the combustion zone, resulting in insufficient combustion to generate carbon monoxide or black smoke and the like, thereby increasing energy consumption. SUMMARY

[0004] Therefore, the present application aims to provide an assembled wallboard type square steel chimney to solve the technical problem of backflow caused by internal negative pressure or external air flow during chimney exhaust.

[0005] To achieve the above purpose, the present application provides an assembled wallboard type square steel chimney, which comprises a chimney body, a flue is formed in the chimney body for flue gas to pass through, and further comprises:

[0006] A cutoff pipe is arranged in the chimney body and has a cutoff cavity formed therein, and two ends of the cutoff cavity are communicated with the flue;

[0007] A cutoff assembly is arranged in the cutoff cavity and comprises a cutoff plate, a first partition plate and an air charging and releasing component, the cutoff plate is arranged on the inner wall at the outlet of the cutoff cavity, the first partition plate is slidably connected in the cutoff cavity in a direction perpendicular to the flue, and the air charging and releasing component is drivingly connected with the first partition plate.

[0008] The air charging and releasing component is used to drive the first partition plate to move away from the flue to accommodate the flue gas cut off by the cutoff plate, and is used to drive the first partition plate to move close to the flue to form upward and downward air flow of the cut-off flue gas in the flue.

[0009] Optionally, the present application further comprises:

[0010] The buffer pipe is arranged above the intercepting pipe and has a buffer cavity inside, both ends of the buffer cavity are communicated with the flue, a second baffle is slidably connected in the buffer cavity, and the second baffle is always subjected to an acting force towards the flue and used for balancing the air pressure on one side of the flue.

[0011] Optionally, the application further comprises:

[0012] The first baffle is rotatably connected to the inner wall at the bottom of the buffer cavity and communicated with the flue;

[0013] The first valve port assembly is used for controlling the opening and closing of the first baffle;

[0014] The second baffle is rotatably connected to the inner wall at the bottom of the intercepting cavity and communicated with the flue;

[0015] The second valve port assembly is used for controlling the opening and closing of the second baffle;

[0016] The air pressure sensor is arranged on the inner wall at the bottom of the intercepting cavity and communicated with the flue and is used for detecting the air pressure of the flue gas in the flue, if the air pressure is greater than the normal working air pressure, the first valve port assembly drives the first baffle to rotate out, when the air charging releasing component forms the air flow, the second valve port assembly drives the second baffle to rotate out and the first valve port assembly drives the first baffle to reset.

[0017] Optionally, the air charging releasing component 503 comprises a first elastic member, a mounting plate, a first sliding plate, a first gear, a first rack, a ratchet wheel, a pawl, a releasing protrusion and a resetting protrusion, one end of the first elastic member is connected with the first baffle, the other end of the first elastic member is connected with the inside of the chimney body, the mounting plate is fixedly connected to the inner wall of the chimney body, the first sliding plate is slidably connected to the mounting plate, the first gear is rotatably connected to the first sliding plate, the first rack is arranged on the mounting plate, the first gear is engaged with the first rack, the ratchet wheel and the pawl are arranged on the first sliding plate and engaged with each other, the pawl is rotatably connected to the first sliding plate, the releasing protrusion is arranged at one end of the mounting plate, when the first sliding plate slides to the side of the mounting plate close to the first baffle, the releasing protrusion is in contact with the pawl, and the resetting protrusion is arranged at the other end of the mounting plate.

[0018] Optionally, the inflation releasing component further comprises a second sliding plate, a clamping plate, a clamping jaw, a driving motor, a second rack, a driving gear and a pressing plate, the second sliding plate is slidingly connected to the first sliding plate and one end thereof is slidingly connected to the first partition plate in the vertical direction, the clamping plate is fixedly connected to the first sliding plate, the second rack is arranged parallel to the first rack and on the second sliding plate, the driving gear is engaged with the second rack, the driving motor is arranged on the chimney body and the output end thereof is drivingly connected to the driving gear, the pressing plate is slidingly connected to the first sliding plate in the vertical direction and slidingly connected to the second sliding plate, the clamping jaw is rotatably connected to the connecting rod fixedly connected to the pressing plate, the side of the clamping plate facing the second sliding plate is provided with a clamping groove, the side of the second sliding plate facing the clamping plate is provided with a jaw groove, the jaw groove is fixedly connected with the clamping jaw with elasticity, the bottom of the second sliding plate is provided with a first reset spring, the driving motor is a self-locking motor, one end of the pressing rod is in abutment with the top surface of the pressing plate, and the pressing motor is drivingly connected to the pressing rod.

[0019] Optionally, the bottom of the first rack is provided with a second reset spring, the first rack is slidingly connected to the mounting plate in the vertical direction, and one side of the pressing plate is fixedly connected to the first rack.

[0020] Optionally, the first sliding plate is fixedly connected with a connecting plate for mounting the first gear, the first gear is engaged with a third gear, the connecting plate is provided with an arc-shaped groove coaxially arranged with the first gear, and the rotating shaft of the third gear is inserted into the arc-shaped groove, and the third gear is engaged with the first rack.

[0021] Optionally, the first valve port assembly comprises a first spring and a second spring, one end of the first spring is connected to the side of the first baffle facing the flue, the other end of the first spring is connected to the second partition plate, spring hanging rods are arranged on the chimney body and the first baffle respectively, and the two ends of the second spring are connected with the spring hanging rods respectively.

[0022] Optionally, the first valve port assembly further comprises a first electric push rod arranged on the inner wall of the chimney body, and one side of the first electric push rod is in abutment with the first baffle.

[0023] Optionally, the second valve port assembly comprises a second electric push rod rotatably connected to the inner wall of the chimney body at one end, and the output end of the second electric push rod is rotatably connected to the second baffle.

[0024] The beneficial effects of the present application are as follows:

[0025] The application sets the intercepting plate, reduces the flue gas flow rate in the chimney through the intercepting plate, and relatively increases the air pressure at the position of the intercepting plate. The air pressure drives the first baffle in the intercepting pipe, so that the intercepting pipe forms a space for accommodating the flue gas intercepted by the intercepting plate. When a certain amount of flue gas is stored, the inflation release component is used to drive the first baffle to flow out of the flue in the chimney body, so that the flue gas is divided into two air flows, the downward air flow is used to hinder the flue gas flow in the flue, and the negative pressure formed due to the high-speed flow of the flue gas is reduced. At the same time, the upward air flow can rush out the flue gas blocked at the outlet of the flue. When there is a backflow, the upward air flow will hinder the flow of the backflow, so as to solve the problems of negative pressure and backflow in the chimney. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only illustrate the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the side view cross-sectional structure of the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the side view cross-sectional structure of the embodiment of the present application. Figure 2 It is an enlarged schematic diagram of the A part in the embodiment of the present application.

[0030] Figure 4 It is an enlarged schematic diagram of the B part in the embodiment of the present application. Figure 2 It is an enlarged schematic diagram of the B part in the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the mounting plate structure of the present application.

[0032] Figure 6 It is a schematic diagram of the mounting plate structure of the present application. Figure 5 It is a schematic diagram of the mounting plate structure of the present application.

[0033] Figure 7 It is a schematic diagram of the mounting plate structure of the present application. Figure 5 It is a schematic diagram of the mounting plate structure of the present application.

[0034] Figure 8 It is a schematic diagram of the mounting plate structure of the present application. Figure 7 It is an enlarged schematic diagram of the C part in the embodiment of the present application.

[0035] Figure 9 It is a schematic diagram of the mounting plate structure of the present application. Figure 7 It is a schematic diagram of the mounting plate structure of the present application.

[0036] Figure 10 It is a schematic diagram of the mounting plate structure of the present application.Figure 5 Structure diagram of one side of the middle mounting plate.

[0037] Marked as:

[0038] 1, chimney body; 2, flue; 3, intercepting pipe; 4, intercepting cavity; 5, intercepting assembly; 6, first partition; 7, buffer pipe; 8, buffer cavity; 9, second partition; 10, first baffle; 11, first valve port assembly; 12, second baffle; 13, second valve port assembly; 14, air pressure sensor; 501, intercepting plate; 503, air charging release component; 504, first elastic member; 505, mounting plate; 506, first sliding plate; 507, first gear; 508, first rack; 509, ratchet wheel; 510, pawl; 511, release lug; 512, reset lug; 513, second sliding plate; 514, clamping plate; 515, clamping jaw; 516, drive motor; 517, second rack; 518, drive gear; 519, pressing plate; 520, pressing rod; 521, pressing motor; 522, connecting rod; 523, clamping groove; 524, jaw groove; 526, first reset spring; 527, second reset spring; 528, connecting plate; 529, third gear; 530, arc-shaped groove; 1001, first spring; 1002, second spring; 1003, spring hanging rod; 1004, first electric push rod; 1201, second electric push rod. DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to specific examples.

[0040] The assembled wallboard type square steel chimney proposed in one or more embodiments of the present specification, like Figures 1 to 10As shown, including chimney body 1, cutoff pipe 3, buffer pipe 7, cutoff assembly 5, air release component 503, first baffle 10, first valve port assembly 11, second baffle 12, second valve port assembly 13 and air pressure sensor 14, the chimney body 1 is provided with a vertical flue 2, the cutoff pipe 3 and the buffer pipe 7 are arranged on the chimney body 1 and the inside of each is communicated with the flue 2, the cutoff assembly 5 is arranged in the cutoff pipe 3 and is used to block the flue gas, the air release component 503 is arranged in the buffer pipe 7 for the recovery and release of flue gas, thereby forming upward and downward airflow in the flue 2, the buffer pipe 7 is used to accommodate the backflow gas, the first baffle 10 is rotatably connected to the inner wall at the bottom of the buffer cavity 8 and communicated with the flue 2, the first valve port assembly 11 is used to control the opening and closing of the first baffle 10, the second baffle 12 is rotatably connected to the inner wall at the bottom of the cutoff cavity 4 and communicated with the flue 2, the second valve port assembly 13 is used to control the opening and closing of the second baffle 12, the air pressure sensor 14 is arranged on the inner wall at the bottom of the cutoff cavity 4 and communicated with the flue 2, when the air release component 503 forms airflow, the first valve port assembly 11 opens the first baffle 10, the second valve port assembly 13 closes the second baffle 12, so that the airflow can be more concentrated to spray upward, thereby solving the problem of backflow and the persistence of backflow, reducing the downward airflow, avoiding the problem of internal flue gas stopping movement, causing the problem of excessive internal chimney pressure.

[0041] As shown, the buffer pipe 7 is arranged above the cutoff pipe 3 and is provided with a buffer cavity 8 inside, the buffer cavity 8 is communicated with the flue 2 at both ends, the second partition plate 9 is slidably connected in the buffer cavity 8, the second partition plate 9 is always subjected to a force towards the flue 2 and used to balance the air pressure on one side, the second partition plate 9 and the chimney body 1 are connected with a slide rail guide, the slide rail guide ensures the accuracy of the second partition plate 9 when sliding, the second partition plate 9 and the chimney body 1 are provided with a tension spring, when the chimney opening appears in the gale weather to form backflow, the backflow airflow flows through the buffer pipe 7, the accumulated gas acts on the first baffle 10, the second baffle 12 slides away from the flue 2, the space of the buffer pipe 7 increases, the air pressure of the backflow airflow is reduced, the flow rate is reduced and it is stored in the buffer pipe 7, avoiding the backflow airflow further flowing to the bottom of the chimney, the problem of excessive air pressure at the bottom of the chimney, at the same time, avoiding the problem of sudden increase of air pressure at the chimney opening, causing the gas in the inner wall to be difficult to overflow, when the backflow airflow disappears, the tension spring pulls the second partition plate 9 back to the initial position, the tension spring provides a force towards the flue 2 and used to balance the air pressure on one side of the second partition plate 9, it should be noted that the buffer pipe 7 and the cutoff pipe 3 can be communicated with the waste recycling pipeline, or a filter screen can be installed to be directly communicated with the outside, avoiding the first partition plate 6 and the second partition plate 9 moving to form a closed space on one side of the buffer pipe 7 and the cutoff pipe 3 relative to the flue 2, causing the first partition plate 6 and the second partition plate 9 to have large sliding resistance.

[0042] As shown in the drawings, the first baffle 10 is rotationally connected to the inner wall at the bottom of the buffer cavity 8 and communicates with the flue 2, the first valve port assembly 11 is used to control the opening and closing of the first baffle 10, the first valve port assembly 11 comprises a first spring 1001 and a second spring 1002, one end of the first spring 1001 is connected to the side of the first baffle 10 facing the flue 2, the other end of the first spring 1001 is connected to the second partition plate 9, the chimney body 1 and the first baffle 10 are both provided with a spring hanging rod 1003, the spring hanging rod 1003 is arranged on the side of the second partition plate 9 away from the flue 2, the two ends of the second spring 1002 are respectively connected with the spring hanging rod 1003, the first electric push rod 1004 is arranged on the inner wall of the chimney body 1, one side of the first electric push rod 1004 abuts against the first baffle 10, when working, when the first partition plate 6 slides away from the flue 2, the first partition plate 6 drives one end of the first spring 1001 to move away, so that the first spring 1001 is stretched, because the second spring 1002 is arranged on the other side of the first baffle 10, the two springs are simultaneously stretched, so that the first baffle 10 is in a force balance state due to the two springs, and the angle of the first baffle 10 is proportional to the movement distance of the first partition plate 6, that is, the farther the first partition plate 6 moves, the larger the area of the first baffle 10 shielding the flue 2, when the air pressure in the buffer cavity 8 is larger, the shielding area of the baffle is larger, so as to prevent the external backflow wind pressure from being too large, the first baffle 10 can block enough backflow air flow, at the same time, the first electric push rod 1004 is arranged at the bottom, so that when the inflation release component 503 works, the first electric push rod 1004 is in a working state, the first baffle 10 is pushed back to the initial position, ensuring that the flue 2 is in an open state, so that the upward air flow has enough strength.

[0043] As shown in the figure, the intercepting pipe 3 is arranged right below the buffer pipe 7 and has an intercepting cavity 4 inside, the two ends of the intercepting cavity 4 are communicated with the flue 2; the intercepting assembly 5 includes an intercepting plate 501, a first partition plate 6, an air charging and releasing component 503, the intercepting plate 501 is arranged on the inner wall at the outlet of the intercepting cavity 4, the first partition plate 6 is slidingly connected in the intercepting cavity 4 along the direction perpendicular to the flue 2, the air charging component and the releasing component are drivingly connected with the first partition plate 6; the air charging and releasing component 503 includes a first elastic member 504, a mounting plate 505, a first sliding plate 506, a first gear 507, a first rack 508, a ratchet wheel 509, a pawl 510, a releasing protrusion 511 and a reset protrusion 512, one end of the first elastic member 504 is connected with the first baffle 10, the other end of the first elastic member 504 is connected with the inside of the chimney body 1, the mounting plate 505 is fixedly connected on the inner wall of the chimney body 1, the first sliding plate 506 is slidingly connected on the mounting plate 505, the first gear 507 is rotatably connected on the first sliding plate 506, the first rack 508 is arranged on the mounting plate 505, the first gear 507 is engaged with the first rack 508, the ratchet wheel 509 and the pawl 510 are arranged on the first sliding plate 506 and are engaged with each other, the pawl 510 is rotatably connected on the first sliding plate 506, the releasing protrusion 511 is arranged on one end of the mounting plate 505, when the first sliding plate 506 slides to the side of the mounting plate 505 close to the first baffle 10, the releasing protrusion 511 is in contact with the pawl 510, the reset protrusion 512 is arranged on the other end of the mounting plate 505, in operation, the intercepting plate completes the interception of the flue gas, so that the flue gas stays in the intercepting pipe 3, and enough air pressure is ensured in the intercepting pipe 3, so that the intercepted flue gas pushes the first partition plate 6, so that the flue gas stays in the intercepting pipe 3, when the first partition plate 6 moves and drives the first sliding plate 506 to slide, the first sliding plate 506 drives the first gear 507 on it to rotate and at the same time drives the first elastic member 504 to be elastically deformed, so that the first gear 507 moves along the length direction of the rack, at the same time, since the ratchet wheel 509 is coaxially arranged with the first gear 507, the ratchet wheel 509 rotates coaxially with the first gear 507, due to the limitation of the pawl 510, the ratchet wheel 509 can only rotate in one direction, therefore, when the air pressure in the intercepting pipe 3 increases to the maximum, that is, the first partition plate 6 moves to the farthest position, and the first elastic member 504 is elastically deformed to the maximum, at this time, the ratchet wheel 509 and the pawl 510 also move to the other end of the mounting plate with the first sliding plate 506, at this time, the releasing protrusion 511 is in contact with the pawl 510, so that the pawl 510 is separated from the ratchet wheel 509, the ratchet wheel 509 loses control, the elastic force of the first elastic member 504 pulls the first partition plate 6 to return to the initial position, it should be noted that the connecting rod 522 limits the free rotation of the pawl 510 through the friction force after installation, so as to push the first sliding plate 506 to return to the original position, at the same time, the pawl 510 on the first sliding plate 506 also returns to the original position, since the reset protrusion is arranged at the original position, the reset protrusion is in contact with the pawl 510, so as to make the pawl 510 reengage with the ratchet wheel 509.

[0044] As shown in the figure, the air inflation releasing part 503 further comprises a second sliding plate 513, a clamping plate 514, a clamping jaw 515, a driving motor 516, a second rack 517, a driving gear 518 and a pressing plate 519, the second sliding plate 513 is slidingly connected to the first sliding plate 506 and one end thereof is slidingly connected to the first partition plate 6 in the vertical direction, the clamping plate 514 is fixedly connected to the first sliding plate 506, the second rack 517 is parallel to the first rack 508 and is arranged on the second sliding plate 513, the driving gear 518 is engaged with the second rack 517, the driving motor 516 is arranged on the chimney body 1 and the output end thereof is drivingly connected to the driving gear 518, the pressing plate 519 is slidingly connected to the first sliding plate 506 in the vertical direction and is slidingly connected to the second sliding plate 513, the pressing plate 519 is fixedly connected with a connecting rod 522, the pawl 510 is rotatably connected to the connecting rod 522, a clamping groove 523 is formed in the side of the clamping plate 514 facing the second sliding plate 513, a jaw groove 524 is formed in the side of the second sliding plate 513 facing the clamping plate 514, the clamping jaw 515 with elasticity is fixedly connected in the jaw groove 524, the bottom of the second sliding plate 513 is provided with a first reset spring 526, the driving motor 516 is a self-locking motor, one end of the pressing rod 520 is in abutment with the top surface of the pressing plate 519, the pressing motor 521 is drivingly connected to the pressing rod 520, the first rack 508 is slidingly connected to the mounting plate 505 in the vertical direction, and one side of the pressing plate 519 is fixedly connected to the first rack 508.When working, the smoke pressure in the intercepting cavity 4 is increased due to the interception of the smoke, thereby completing the storage of the smoke. When the negative pressure appears at the bottom, the elasticity of the first elastic member 504 promotes the stored smoke to complete the reduction of the negative pressure, thereby reducing the flow rate of the smoke in the flue 2. The driving motor 516 is arranged. When the driving motor 516 rotates, the driving gear 518 is driven to rotate, the second rack 517 is pushed by the driving gear 518 to extend towards the side of the first partition plate 6, the second slide plate 513 is driven by the second rack 517 to extend, the clamping plate 514 is pressed against the clamping jaw 515 to be elastically deformed and pressed into the jaw groove 524, and the clamping jaw 515 is popped when it is opposite to the clamping groove 523, thereby hindering the retraction of the second rack 517. Since the second rack 517 is fixedly connected with the first partition plate 6, the first partition plate 6 receives an action force towards the flue 2. The retraction of the second rack 517 is limited by the cooperation of the clamping jaw 515 and the clamping plate 514, thereby completing the gradual increase of the intercepting cavity 4 and ensuring that there is enough smoke in the intercepting cavity 4. Since the smoke in the chimney is not necessarily in a full state at all times, there is not necessarily enough smoke in the intercepting cavity 4. The driving motor 516 is arranged to complete the internal energy storage. When the smoke is released, the pressure motor 521 is in a working state, the pressure rod 520 is driven to rotate, one end of the pressure rod 520 is pressed against the pressure plate 519, the pressure plate 519 is driven to move downwards, the second slide plate 513 and the connecting rod 522 are driven to move downwards, the clamping jaw 515 is separated from the clamping groove 523 when the second slide plate 513 moves downwards, and the connecting rod 522 drives the ratchet jaw 510 to be separated from the ratchet wheel 509. At this time, the first elastic member 504 pushes the second slide plate 513 to make it coincide with the first slide plate 506, and then pushes the first slide plate 506 to return to the initial position, thereby completing the discharge of the smoke.

[0045] As shown in the figure, the bottom of the first rack 508 is provided with a second reset spring 527, the first rack 508 is connected to the mounting plate 505 in the vertical direction, and one side of the pressing plate 519 is fixedly connected with the first rack 508. The first sliding plate 506 is fixedly connected with a connecting plate 528 for mounting the first gear 507, the first gear 507 is engaged with a third gear 529, an arc-shaped slot 530 is formed in the connecting plate 528, the arc-shaped slot 530 is coaxially arranged with the first gear 507, the rotating shaft of the third gear 529 is inserted into the arc-shaped slot 530, and the third gear 529 is engaged with the first rack 508. When the pressing plate 519 moves downward, the second rack 517 is pushed to move downward at the same time, so that there is a gap between the first gear 507 and the first rack 508, at this time, the third gear 529 moves downward along the arc-shaped slot 530 under the action of gravity, so that the surface of the first rack 508 adhered by the third gear 529 is restored to the original position, and the third gear 529 is engaged with the first rack 508. Since there is a tooth number ratio between the first gear 507 and the third gear 529, different third gears 529 can be arranged to make the first baffle 6 return to the original position at different speeds.

[0046] As shown in the figure, the second baffle 12 is rotatably connected to the inner wall at the bottom of the flow interception cavity 4 and the chimney 2; the second valve port assembly 13 is used for controlling the opening and closing of the second baffle 12, and the second valve port assembly 13 includes a second electric push rod 1201 rotatably connected to the inner wall of the chimney body 1 at one end, and the output end of the second electric push rod 1201 is rotatably connected with the second baffle 12; the air pressure sensor 14 is arranged on the inner wall at the bottom of the flow interception cavity 4 and the chimney 2 and is used for detecting the air pressure in the chimney 2. If the air pressure is greater than the normal working air pressure, the first valve port assembly 11 drives the first baffle 10 to rotate out. When the air flow is formed by the air charging and releasing component 503, the second valve port assembly 13 drives the second baffle 12 to rotate out, and the first valve port assembly 11 drives the first baffle 10 to reset. Since the air pressure sensor 14 is arranged at the bottom of the flow interception cavity 4, when the air pressure increases, it indicates that the air outlet of the chimney is blocked. At this time, the first valve port assembly 11 is driven to rotate out, and the air flow is stored. When the air flow is not formed by the air charging and releasing component 503, it indicates that the air flow is full and in a releasing state. The second valve port assembly 13 drives the second baffle 12 to rotate out, and the first baffle 10 is reset to avoid excessive air flow along the chimney downward to cause excessive internal pressure. Part of the downward air flow can complete the smoke flow rate in the chimney, avoid the problem of excessive flow rate causing negative pressure, and make the accumulated air flow mainly upward when flowing out, which has enough air pressure to blow away the backflow air flow and prevent backflow.

[0047] Those skilled in the art should understand that the above discussion of any embodiment is merely exemplary in nature and is not intended to imply that the present application, including the claims, is limited to these examples; nor that combinations of the above embodiments, or parts thereof, cannot be performed in any order; nor that many other modifications, changes, alternatives and variations will not be apparent to the skilled artisan once the application disclosed herein is known or, in the spirit and principle of the application, many other changes can be made thereto, and such changes are intended to fall within the scope of the appended claims. Accordingly, any omission, modification, substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. An assembled wallboard type square steel chimney comprising a chimney body (1) having a flue (2) for passing flue gas, characterized in that, Also comprising: a cut-off pipe (3) arranged with the chimney body (1) and having a cut-off cavity (4) formed therein, the two ends of the cut-off cavity (4) being communicated with the flue (2); a cut-off assembly (5) comprising a cut-off plate (501), a first baffle (6), and an air charging release component (503), the cut-off plate (501) being arranged on the inner wall at the outlet of the cut-off cavity (4), the first baffle (6) being slidingly connected in the cut-off cavity (4) in a direction perpendicular to the flue (2), and the air charging release component (503) being drivingly connected with the first baffle (6); the air charging release component (503) is used to drive the first baffle (6) to move away from the flue (2) to accommodate the flue gas cut off by the cut-off plate (501) and to drive the first baffle (6) to move close to the flue (2) to form upward and downward air flow in the flue (2) for the cut-off flue gas.

2. A square steel chimney according to claim 1, characterised in that Also comprising: a buffer pipe (7) arranged above the cut-off pipe (3) and having a buffer cavity (8) formed therein, the two ends of the buffer cavity (8) being communicated with the flue (2), and a second baffle (9) being slidingly connected in the buffer cavity (8), the second baffle (9) always being subjected to a force acting towards the flue (2) and used to balance the air pressure on one side thereof.

3. A square steel chimney according to claim 2, characterised in that Also comprising: a first baffle (10) rotatably connected on the inner wall at the bottom of the buffer cavity (8) and communicated with the flue (2); a first valve port assembly (11) used to control the opening and closing of the first baffle (10); a second baffle (12) rotatably connected on the inner wall at the bottom of the cut-off cavity (4) and communicated with the flue (2); a second valve port assembly (13) used to control the opening and closing of the second baffle (12); an air pressure sensor (14) arranged on the inner wall at the bottom of the cut-off cavity (4) and communicated with the flue (2) and used to detect the air pressure of the flue gas in the flue (2), if the air pressure is greater than the normal working air pressure, the first valve port assembly (11) drives the first baffle (10) to rotate out, when the air flow is formed by the air charging release component (503), the second valve port assembly (13) drives the second baffle (12) to rotate out and the first valve port assembly (11) drives the first baffle (10) to reset.

4. The square steel chimney according to claim 1, characterized in that The inflation releasing component (503) comprises a first elastic piece (504), a mounting plate (505), a first sliding plate (506), a first gear (507), a first gear rack (508), a ratchet wheel (509), a pawl (510), a releasing protrusion (511) and a resetting protrusion (512), one end of the first elastic piece (504) is connected with the first baffle (10), the other end of the first elastic piece (504) is connected with the inside of the chimney body (1), the mounting plate (505) is fixedly connected on the inner wall of the chimney body (1), the first sliding plate (506) is slidingly connected on the mounting plate (505), the first gear (507) is rotatably connected on the first sliding plate (506), the first gear rack (508) is arranged on the mounting plate (505), the first gear (507) is engaged with the first gear rack (508), the ratchet wheel (509) and the pawl (510) are both arranged on the first sliding plate (506) and engaged with each other, the pawl (510) is rotatably connected on the first sliding plate (506), the releasing protrusion (511) is arranged on one end of the mounting plate (505), when the first sliding plate (506) slides to the side of the mounting plate (505) close to the first baffle (10), the releasing protrusion (511) is in contact with the pawl (510), and the resetting protrusion (512) is arranged on the other end of the mounting plate (505).

5. A square steel chimney according to claim 4, characterised in that The inflation releasing component (503) further comprises a second sliding plate (513), a clamping plate (514), a clamping jaw (515), a driving motor (516), a second gear rack (517), a driving gear (518), a pressing plate (519), a pressing rod (520) and a pressing motor (521), the second sliding plate (513) is slidingly connected to the first sliding plate (506) and is slidingly connected to the first partition plate (6) in the vertical direction at one end, the clamping plate (514) is fixedly connected to the first sliding plate (506), the second gear rack (517) is parallel to the first gear rack (508) and is arranged on the second sliding plate (513), the driving gear (518) is engaged with the second gear rack (517), the driving motor (516) is arranged on the chimney body (1) and the output end thereof is drivingly connected to the driving gear (518), the pressing plate (519) is slidingly connected to the first sliding plate (506) in the vertical direction with the second sliding plate (513), the pressing plate (519) is slidingly connected to the second sliding plate (513), a connecting rod (522) is fixedly connected to the pressing plate (519), the ratchet (510) is rotatably connected to the connecting rod (522), a clamping groove (523) is formed in the side of the clamping plate (514) facing the second sliding plate (513), a clamping groove (524) is formed in the side of the second sliding plate (513) facing the clamping plate (514), the clamping jaw (515) with elasticity is fixedly connected in the clamping groove (524), a first reset spring (526) is arranged at the bottom of the second sliding plate (513), the driving motor (516) is a self-locking motor, one end of the pressing rod (520) is in abutment with the top surface of the pressing plate (519), and the pressing motor (521) is drivingly connected to the pressing rod (520).

6. A square steel chimney according to claim 5, characterised in that A second reset spring (527) is arranged at the bottom of the first gear rack (508), the first gear rack (508) is slidingly connected to the mounting plate (505) in the vertical direction, and one side of the pressing plate (519) is fixedly connected to the first gear rack (508).

7. The square steel chimney according to claim 4, characterized in that A connecting plate (528) for mounting the first gear (507) is fixedly connected to the first sliding plate (506), the first gear (507) is engaged with a third gear (529), an arc-shaped groove (530) is formed in the connecting plate (528), the arc-shaped groove (530) is coaxially arranged with the first gear (507), the rotating shaft of the third gear (529) is inserted into the arc-shaped groove (530), and the third gear (529) is engaged with the first gear rack (508).

8. The square steel chimney according to claim 3, characterized in that The first valve port assembly (11) comprises a first spring (1001) and a second spring (1002), one end of the first spring (1001) is connected to the side of the first baffle (10) facing the flue (2), the other end of the first spring (1001) is connected to the second partition (9), the chimney body (1) and the first baffle (10) are both provided with spring hanging rods (1003), the spring hanging rods (1003) are respectively arranged on the side of the first partition (6) away from the flue (2), and the two ends of the second spring (1002) are connected with the spring hanging rods (1003) respectively.

9. A square steel chimney according to claim 8, characterised in that The first valve port assembly (11) further comprises a first electric push rod (1004) arranged on the inner wall of the chimney body (1), and one side of the first electric push rod (1004) is in abutment with the first baffle (10).

10. The square steel chimney according to claim 3, characterized in that The second valve port assembly (13) comprises a second electric push rod (1201) rotatably connected to the inner wall of the chimney body (1) at one end, and the output end of the second electric push rod (1201) is rotatably connected with the second baffle (12).

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