CN112797174B

CN112797174B - Smoke-discharging fire-proof valve

Info

Publication number: CN112797174B
Application number: CN202110050489.3A
Authority: CN
Inventors: 孙金才; 孙金柱; 孙朝元; 孙篷元; 曲军; 王孟超
Original assignee: Shandong County Shunda Air Conditioning Equipment Co ltd
Current assignee: Shunda air conditioning equipment Group Co.,Ltd.
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-08-27
Anticipated expiration: 2041-01-14
Also published as: CN112797174A

Abstract

The invention relates to a smoke-discharging fireproof valve, which comprises a valve body, a fireproof blade assembly and two sealing seats, wherein the fireproof blade assembly is arranged in the valve body, the two sealing seats are oppositely arranged on the inner side wall of the valve body, the fireproof blade assembly is arranged between the two sealing seats, a sealing groove is formed in each sealing seat, and one side, close to each sealing seat, of the fireproof blade assembly is provided with a telescopic sealing piece inserted into the sealing groove; according to the invention, the contact mode of the traditional blade and the valve body in the closing state is improved, the rigid contact type closing is converted into the soft contact type closing, the roller rolls on the arc-shaped side edge of the sealing seat and is matched with the extension and retraction of the first spring, the damage to the fireproof blade can be reduced in the closing process, the service life of the fireproof blade is prolonged, and the soft contact type closing is matched with the sealing seat and the sealing piece for use, so that the sealing effect on the closing part of the valve body is realized in the closing process of the fireproof blade, and the fireproof effect of the fireproof blade on high-temperature smoke is improved.

Description

Smoke-discharging fire-proof valve

Technical Field

The invention relates to the technical field of fire fighting equipment, in particular to a smoke exhaust fire prevention valve.

Background

Fire extinguishing system is the indispensable component part in the middle of the building construction, when the conflagration appears in the building, fire extinguishing system can play fine fire prevention back-fire relief effect, can prolong the time of fleing for people, wherein, the important component part of fire extinguishing system smoke exhaust in-process is regarded as to the fire damper of discharging fume, is the state of opening at ordinary times, open when taking place the conflagration and discharge fume, close when smoke temperature reaches 280 degrees in the exhaust pipe, can play fine fire prevention effect when reaching higher temperature to the flue gas, prevent that fire extinguishing system from causing the promotion effect to the flue gas when the too big condition of conflagration.

However, current smoke exhaust fire damper, when the closure state, the blade of its fire damper is all as an organic whole mostly, at the rapid closure in-process, its blade can direct contact valve body inner wall, can cause the damage of blade, cause the junction to appear leaking the wind district easily, its leakproofness is not high, can't reach fine fire prevention effect to the high temperature flue gas, and be in the blade under the high temperature flue gas, can directly bear the impact force of the heat wave of flue gas, there is the blade because of bearing the problem that the heat wave impact damages.

In order to solve the problems, the invention provides a smoke exhaust fire prevention valve.

Disclosure of Invention

(1) Technical problem to be solved

The invention aims to overcome the defects of the prior art, adapt to the practical requirements and provide a smoke exhaust fire damper to solve the technical problems.

(2) Technical scheme

In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:

a smoke-discharging fireproof valve comprises a valve body, a fireproof blade assembly and two sealing seats, wherein the fireproof blade assembly is arranged in the valve body, the two sealing seats are oppositely arranged on the inner side wall of the valve body, the fireproof blade assembly is arranged between the two sealing seats, a sealing groove is formed in each sealing seat, and one side, close to each sealing seat, of each fireproof blade assembly is provided with a telescopic sealing piece inserted into each sealing groove;

the fireproof blade assembly comprises a plurality of fireproof blades, the fireproof blades are provided with connecting grooves a and connecting blocks b which are matched with each other, the connecting blocks b and the connecting grooves a are symmetrically arranged on two side surfaces of each fireproof blade along the circumferential direction, and two adjacent fireproof blades are inserted into the connecting grooves a through the connecting blocks b and used for closing the connecting parts of the two adjacent fireproof blades;

the fire-proof valve is characterized in that a fixing groove is formed in the inner side wall of the valve body, and a telescopic fixing assembly used for being inserted into the fixing groove is arranged on the blade surface of the fire-proof blade.

Further, the seal groove includes that the roller groove and two that locate on the seal receptacle along the axial are located the access groove of roller groove both sides respectively, the roller groove is the arc wall, the both sides of seal receptacle are the arc design.

Further, the sealing member is including locating the first spring on the fire prevention blade, and the other end of first spring is equipped with the fixed plate, the other end of fixed plate is equipped with the gyro wheel that the direction of rolling is unanimous with the direction of rotation of fire prevention blade and two sealing strips that are located the gyro wheel both sides respectively, be equipped with the telescopic flexible platform that is used for sheltering from first spring between fixed plate and the fire prevention blade, the arc length of arc wall is less than the semiperimeter of gyro wheel.

Further, fixed subassembly includes fixed frame of fixed connection on the fire prevention blade, wears to be equipped with the extension rod along the seal receptacle direction in the fixed frame, and the one end of extension rod is equipped with the stationary blade that extends to in the fixed slot, and the other end is equipped with first aviation baffle, and the extension rod outside is equipped with the second spring that is located fixed frame, the second spring is used for driving the stationary blade and shifts out the fixed slot.

Furthermore, be equipped with the plug connector that is relative setting with spread groove a on the fixed plate, the both ends of connecting block b all are equipped with the joint spare that is used for the joint plug connector.

Furthermore, the plug connector comprises a third spring arranged on the fixing plate, the other end of the third spring is provided with a connecting frame, and the inner side of the connecting frame is rotatably provided with a first gear.

Further, the joint spare is including locating the holding tank on the connecting block b, rotatable formula is equipped with the second gear in the holding tank, the third spring is used for driving first gear and second gear engagement and remove to the inboard of holding tank.

Further, still include a plurality of locate on the seal receptacle and with insert the hole that compresses tightly of groove intercommunication, compress tightly downthehole being equipped with and be used for compressing tightly the sealing strip in inserting the downthehole compressing assembly that inserts, compressing assembly includes rotatable formula locate and compress tightly downthehole dwang, dwang one end is equipped with the second aviation baffle that is located the seal receptacle outside, and the other end is equipped with and is located the compact heap that is used for compressing tightly the sealing strip in the access groove, the dwang outside is equipped with and compresses tightly downthehole wall fixed connection and be used for the bellows in closed compressing hole.

Furthermore, the one end that the sealing strip is located the access slot is equipped with curved piece, the compact heap is the arc, and curved piece and the central point of compact heap all are located between curved piece and the compact heap.

Further, be equipped with the torsional spring between dwang and the downthehole side that compresses tightly, the torsional spring is used for driving dwang and compact heap and keeps away from curved piece.

(3) Has the advantages that:

A. according to the invention, the contact mode of the traditional blade and the valve body in the closing state is improved, the rigid contact type closing is converted into the soft contact type closing, the roller rolls on the arc-shaped side edge of the sealing seat and is matched with the extension and retraction of the first spring, the damage to the fireproof blade can be reduced in the closing process, the service life of the fireproof blade is prolonged, and the soft contact type closing is matched with the sealing seat and the sealing piece for use, so that the sealing effect on the closing part of the valve body is realized in the closing process of the fireproof blade, and the fireproof effect of the fireproof blade on high-temperature smoke is improved.

B. When sealing member and seal receptacle are pegged graft and are played sealed effect, the connecting block on the fire prevention blade can coincide the spread groove and insert simultaneously to seal the junction between the adjacent fire prevention blade, realize the sealed effect to between the adjacent fire prevention blade, avoid high temperature flue gas to see through from the fire prevention blade junction, and the structural design of connecting block and spread groove is reasonable, can realize the linkage effect with the sealing member.

C. The fixing assembly is further arranged, when the fireproof blade is closed, the first air deflector can be pushed to drive the fixing piece to be inserted into the fixing groove by means of wind power generated by high-temperature smoke, so that the fireproof blade is further fixed, the bearing capacity of the fireproof blade to hot wave impact force in the high-temperature smoke is improved, and the service life of the fireproof blade is prolonged.

Drawings

FIG. 1 is a schematic view of the overall structure of the smoke evacuation fire damper of the present invention;

FIG. 2 is a schematic structural view of a fire vane of the smoke evacuation fire damper of the present invention;

FIG. 3 is a schematic structural view of a sealing seat of the smoke evacuation fire damper of the present invention;

FIG. 4 is a schematic view of the connection of the sealing member and the fire vane of the smoke evacuation fire damper of the present invention;

FIG. 5 is a schematic view of another perspective connection of the sealing member and the fire vane of the smoke evacuation fire damper of the present invention;

FIG. 6 is an enlarged view of the smoke evacuation fire damper of the present invention at C in FIG. 1;

FIG. 7 is an enlarged view of the smoke evacuation fire damper of the present invention at B in FIG. 5;

FIG. 8 is an enlarged view of the position A in FIG. 4;

FIG. 9 is an enlarged view of the smoke evacuation fire damper of the present invention at D in FIG. 3;

FIG. 10 is a schematic view of the compression assembly of the smoke damper of the present invention.

The reference numbers are as follows:

the valve body 1, the fire prevention blade assembly 2, the fire prevention blade 21, the connecting groove 2a, the connecting block 2b, the seal receptacle 3, the seal groove 4, the roller groove 41, the access groove 42, the sealing member 5, the first spring 51, the fixing plate 52, the roller 53, the seal strip 54, the expansion table 55, the fixing groove 6, the fixing assembly 7, the fixing frame 71, the extension rod 72, the fixing piece 73, the first air deflector 74, the second spring 75, the plug connector 8, the third spring 81, the connecting frame 82, the first gear 83, the plug connector 9, the receiving groove 91, the second gear 92, the pressing hole 10, the pressing assembly 11, the rotating rod 111, the second air deflector 112, the pressing block 113, the corrugated pipe 114, the torsion spring 115, and the bent block 12.

Detailed Description

The invention will be further illustrated with reference to the following figures 1-10 and examples:

as shown in fig. 1 and 2, a smoke-discharging fire-proof valve comprises a valve body 1 and a fire-proof blade assembly 2 arranged in the valve body 1, and further comprises two sealing seats 3 oppositely arranged on the inner side wall of the valve body 1, the fire-proof blade assembly 2 is arranged between the two sealing seats 3, a sealing groove 4 is arranged on the sealing seat 3, one side of the fire-proof blade assembly 2 close to the sealing seat 3 is provided with a telescopic sealing element 5 inserted into the sealing groove 4, so that a rigid contact type closure is converted into a soft contact type closure, the damage to the fire-proof blade 21 per se can be reduced in the closure process, and the service life of the fire-proof blade 21 is prolonged;

the fireproof blade assembly 2 comprises a plurality of fireproof blades 21, the fireproof blades 21 are provided with connecting grooves 2a and connecting blocks 2b which are matched with each other, the connecting blocks 2b and the connecting grooves 2a are symmetrically arranged on two side surfaces of the fireproof blades 21 along the circumferential direction, two adjacent fireproof blades 21 are inserted into the connecting grooves 2a through the connecting blocks 2b for closing the joints of the two adjacent fireproof blades 21, when the sealing element 5 and the sealing seat 3 are inserted for sealing, the connecting blocks 2b on the fireproof blades 21 are inserted in a matching manner with the connecting grooves 2a, so that the joints between the adjacent fireproof blades 21 are sealed, the sealing effect between the adjacent fireproof blades 21 is realized, the high-temperature smoke is prevented from permeating through the joints of the fireproof blades 21, the connecting blocks 2b and the connecting grooves 2a are reasonable in structural design, the linkage effect with the sealing element 5 can be realized, and the fireproof blade assembly 2 further comprises a plurality of connecting rod assemblies arranged between the two adjacent fireproof blades 21, and two adjacent link assembly one end are located respectively on the both sides face of same fire prevention blade 21, are equipped with drive assembly on the valve body 1, and drive assembly is used for driving fire prevention blade subassembly 2 closed valve body 1, and the one side that is close to valve body 1 of fire prevention blade 21 adjacent with valve body 1 also is equipped with sealing strip 54. The sealing strip 54 may be made of a high-temperature-resistant material such as rock wool.

Be equipped with fixed slot 6 on the inside wall of valve body 1, be equipped with the telescopic fixed subassembly 7 that is used for inserting in fixed slot 6 on the blade surface of fire prevention blade 21, further fixed fire prevention blade 21, improve the holding capacity of fire prevention blade 21 to the flue gas impact force.

In this embodiment, as shown in fig. 3, 4 and 5, the sealing groove 4 includes a roller groove 41 axially disposed on the sealing seat 3 and two access grooves 42 respectively disposed at two sides of the roller groove 41, the roller groove 41 is an arc-shaped groove, and two sides of the sealing seat 3 are designed in an arc shape.

Further, the sealing member 5 includes a first spring 51 disposed on the fire-proof vane 21, the other end of the first spring 51 is provided with a fixing plate 52, the other end of the fixing plate 52 is provided with a roller 53 having a rolling direction consistent with the rotation direction of the fire-proof vane 21 and two sealing strips 54 respectively disposed at two sides of the roller 53, a telescopic table 55 for shielding the first spring 51 is disposed between the fixing plate 52 and the fire-proof vane 21, the arc length of the arc-shaped groove is smaller than the half perimeter of the roller 53, the roller 53 and the sealing strips 54 are driven by the extension of the first spring 51 to adapt to the height change of the seal housing 3 along with the movement of the fire-proof vane 21, the sealing strips 54 are inserted into the access groove 42 when the roller 53 moves in the roller groove, thereby achieving a sealing effect without hard contact with the valve body 1, avoiding damage to the vane body, and achieving a better sealing effect, and the arc design at two sides of the seal housing 3 can facilitate the movement of the roller 53 driven by the fire-proof vane 21 to be smoother, the arcuate length of the slot is less than half the circumference of the roller 53 to facilitate subsequent removal of the roller 53.

In this embodiment, as shown in fig. 6, the fixing assembly 7 includes a fixing frame 71 fixedly connected to the fireproof vane 21, an extension rod 72 penetrates through the fixing frame 71 in a direction toward the sealing seat 3, a fixing plate 73 extending into the fixing groove 6 is disposed at one end of the extension rod 72, a first air guiding plate 74 is disposed at the other end of the extension rod, the first air guiding plate 74 is of an arc air guiding design, a second spring 75 disposed in the fixing frame 71 is disposed outside the extension rod 72, the second spring 75 is used for driving the fixing plate 73 to move out of the fixing groove 6, and a pushing force can be generated with the surface of the first air guiding plate 74 by utilizing the wind force in the high-temperature flue gas, thereby driving the fixing piece 73 to be inserted into the fixing groove 6, further improving the strength of the fireproof vane 21 in a closed state, and without arranging a power source, thereby playing the role of energy saving and consumption reduction and achieving the role of reducing the production cost in the actual production process.

In this embodiment, as shown in fig. 7 and 8, the fixing plate 52 is provided with a plug connector 8 disposed opposite to the connecting groove 2a, and both ends of the connecting block 2b are provided with clamping members 9 for clamping the plug connector 8;

further, the plug 8 includes a third spring 81 disposed on the fixed plate 52, the other end of the third spring 81 is provided with a connecting frame 82, and the inner side of the connecting frame 82 is rotatably provided with a first gear 83;

further, joint spare 9 is including locating holding tank 91 on connecting block 2b, rotatable formula is equipped with second gear 92 in holding tank 91, third spring 81 is used for driving first gear 83 and the meshing of second gear 92 and removes the inboard to holding tank 91, at the closed in-process of fire prevention blade 21, can contact each other and mesh between first gear 83 and the second gear 92, and the elasticity of cooperation third spring 81, when well fire prevention blade 21 accomplishes the closure, first gear 83 can shift into in holding tank 91 completely, realized the further fixed to adjacent fire prevention blade 21 junction, this reasonable in design, can realize the combined action with fire prevention blade 21, need not to design the power supply, can strengthen the fixed and sealed effect of fire prevention blade 21 itself.

In this embodiment, as shown in fig. 9 and 10, the sealing device further includes a plurality of compressing holes 10 disposed on the sealing seat 3 and communicated with the access slot 42, a compressing assembly 11 for compressing the sealing strip 54 in the access slot 42 is disposed in the compressing hole 10, the compressing assembly 11 includes a rotating rod 111 rotatably disposed in the compressing hole 10, one end of the rotating rod 111 is provided with a second air deflector 112 located outside the sealing seat 3, the other end of the rotating rod is provided with a compressing block 113 located in the access slot 42 for compressing the sealing strip 54, and the outside of the rotating rod 111 is provided with a bellows 114 fixedly connected with the inner wall of the compressing hole 10 for closing the compressing hole 10;

furthermore, a bent block 12 is arranged at one end, located in the access groove 42, of the sealing strip 54, the pressing block 113 is arc-shaped, the central points of the bent block 11 and the pressing block 113 are both located between the bent block 12 and the pressing block 113, and a pushing force can be generated between the central points and the surface of the second air deflector 112 by utilizing the wind force effect in the high-temperature flue gas, so that the pressing block 113 is driven to rotate to press the bent block 12 on the sealing strip 54, and the impact resistance and the sealing effect of the sealing strip 54 when dealing with the flue gas impact are further improved;

further, a torsion spring 115 is arranged between the rotating rod 111 and the inner side of the pressing hole 10, the torsion spring 115 is used for driving the rotating rod 111 and the pressing block 113 to be away from the bent block 12, when sealing is not needed, smoke is not flowed through on the second air deflector 112, the torsion spring 115 can drive the pressing block 113 not to press the bent block 12, pressing of the sealing strip 54 is relieved, and subsequent moving-out of the sealing strip 54 is facilitated.

The invention has the beneficial effects that:

according to the invention, the contact mode of the traditional blade and the valve body 1 in the closing state is improved, the hard contact type closing is converted into the soft contact type closing, the roller 53 rolls on the arc-shaped side edge of the sealing seat 3 and is matched with the extension and retraction of the first spring 51, the damage to the fireproof blade 21 can be reduced in the closing process, the service life of the fireproof blade 21 is prolonged, and the soft contact type closing is matched with the sealing seat 3 and the sealing piece 5 for use, so that the sealing effect of the closing part of the valve body 1 is realized in the closing process of the fireproof blade 21, and the fireproof effect of the fireproof blade 21 on high-temperature smoke is improved.

When sealing member 5 and seal receptacle 3 are pegged graft and are played sealed effect, connecting block 2b on the fire prevention blade 21 can coincide the spread groove 2a and insert simultaneously to seal the junction between the adjacent fire prevention blade 21, realize the sealed effect to between the adjacent fire prevention blade 21, avoid high temperature flue gas to see through from fire prevention blade 21 junction, and connecting block 2b and spread groove 2 a's structural design is reasonable, can realize the linkage effect with sealing member 5.

The invention is also provided with the fixing component 7, when the fireproof blade 21 is closed, the first air deflector 74 can be pushed to drive the fixing piece 73 to be inserted into the fixing groove 6 by means of wind power generated by high-temperature smoke, so that the fireproof blade 21 can be further fixed, the bearing capacity of the fireproof blade 21 on the impact force of heat waves in the high-temperature smoke is improved, and the service life of the fireproof blade 21 is prolonged.

The working principle is as follows: when the flue gas reaches the rated temperature, the fire prevention blade 21 starts to close, firstly, the sealing element 5 is driven to move along the arc slope of the sealing seat 3, when the fire prevention blade 21 is closed, the roller 53 and the sealing strip 54 respectively enter the roller groove 41 and the access groove 42, and the connecting block 2b is also matched and spliced with the connecting groove 2a, so that the sealing of the fire prevention blade 21 and the valve body 1 is realized, meanwhile, when the fire prevention blade 21 is closed, the plug connector 8 and the plug connector 9 can be mutually clamped, the sealing part is further fixed synchronously, then, the fire prevention blade 21 bears the flue gas in the front face, the pressing assembly 11 and the fixing assembly 7 on the sealing seat 3 and the fire prevention blade 21 are respectively driven by the air flow in the flue gas and are respectively fixed with the bent block 12 and the fixing groove 6, the fixing of the sealing part and the blade body 21 is further realized, namely, the whole closing process is completed.

The embodiments of the present invention are disclosed as the preferred embodiments, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention and make various extensions and changes without departing from the spirit of the present invention.

Claims

1. The smoke-discharging fireproof valve comprises a valve body (1) and a fireproof blade assembly (2) arranged in the valve body (1), and is characterized by further comprising two sealing seats (3) oppositely arranged on the inner side wall of the valve body (1), wherein the fireproof blade assembly (2) is arranged between the two sealing seats (3), a sealing groove (4) is formed in each sealing seat (3), and one side, close to each sealing seat (3), of each fireproof blade assembly (2) is provided with a telescopic sealing piece (5) inserted into each sealing groove (4);

the fireproof blade assembly (2) comprises a plurality of fireproof blades (21), the fireproof blades (21) are provided with connecting grooves (2a) and connecting blocks (2b) which are matched with each other, the connecting blocks (2b) and the connecting grooves (2a) are symmetrically arranged on two side surfaces of the fireproof blades (21) along the circumferential direction, and two adjacent fireproof blades (21) are inserted into the connecting grooves (2a) through the connecting blocks (2b) and used for closing the connecting parts of the two adjacent fireproof blades (21);

be equipped with fixed slot (6) on the inside wall of valve body (1), be equipped with telescopic fixed subassembly (7) that are used for inserting in fixed slot (6) on the blade surface of fire prevention blade (21).

2. A smoke evacuation fire damper as claimed in claim 1 wherein: seal groove (4) are including locating roller groove (41) on seal receptacle (3) and two access grooves (42) that are located roller groove (41) both sides respectively along the axial, roller groove (41) are the arc wall, the both sides of seal receptacle (3) are the arc design.

3. A smoke evacuation fire damper as claimed in claim 2 wherein: the sealing element (5) comprises a first spring (51) arranged on the fireproof vane (21), a fixing plate (52) is arranged at the other end of the first spring (51), a roller (53) with the rolling direction consistent with the rotating direction of the fireproof vane (21) and two sealing strips (54) respectively arranged on two sides of the roller (53) are arranged at the other end of the fixing plate (52), a telescopic table (55) used for shielding the first spring (51) is arranged between the fixing plate (52) and the fireproof vane (21), and the arc length of the arc-shaped groove is smaller than the half perimeter of the roller (53).

4. A smoke evacuation fire damper as claimed in claim 1 wherein: fixed subassembly (7) are including fixed frame (71) of fixed connection on fire prevention blade (21), wear to be equipped with extension rod (72) along orientation seal receptacle (3) direction in fixed frame (71), and the one end of extension rod (72) is equipped with stationary blade (73) that extend to in fixed slot (6), and the other end is equipped with first aviation baffle (74), and the extension rod (72) outside is equipped with second spring (75) that are located fixed frame (71), second spring (75) are used for driving stationary blade (73) and shift out fixed slot (6).

5. A smoke evacuation fire damper as claimed in claim 3 wherein: be equipped with on fixed plate (52) and be relative plug connector (8) that set up with spread groove (2a), the both ends of connecting block (2b) all are equipped with joint spare (9) that are used for joint plug connector (8).

6. A smoke evacuation fire damper as claimed in claim 5 wherein: the plug connector (8) comprises a third spring (81) arranged on the fixing plate (52), the other end of the third spring (81) is provided with a connecting frame (82), and the inner side of the connecting frame (82) is rotatably provided with a first gear (83).

7. A smoke evacuation fire damper as claimed in claim 6 wherein: joint spare (9) including locating holding tank (91) on connecting block (2b), rotatable formula is equipped with second gear (92) in holding tank (91), third spring (81) are used for driving the inboard that first gear (83) and second gear (92) meshing and remove holding tank (91).

8. A smoke evacuation fire damper as claimed in any one of claims 3 to 7 wherein: still include a plurality of pressure hole (10) of locating on seal receptacle (3) and with access groove (42) intercommunication, be equipped with in pressure hole (10) and be used for compressing tightly subassembly (11) in access groove (42) with sealing strip (54), compress tightly subassembly (11) including rotatable formula locate dwang (111) in pressure hole (10), dwang (111) one end is equipped with second aviation baffle (112) that are located the seal receptacle (3) outside, and the other end is equipped with and is located access groove (42) and be used for compressing tightly clamp block (113) of sealing strip (54), dwang (111) outside is equipped with bellows (114) that are used for closed pressure hole (10) with pressure hole (10) inner wall fixed connection.

9. A smoke evacuation fire damper as claimed in claim 8 wherein: the sealing strip (54) is located the one end of access slot (42) and is equipped with curved piece (12), compact heap (113) is the arc, and the central point of curved piece (12) and compact heap (113) all is located between curved piece (12) and compact heap (113).

10. A smoke evacuation fire damper as claimed in claim 9 wherein: be equipped with torsional spring (115) between dwang (111) and compact heap (10) inboard, torsional spring (115) are used for driving dwang (111) and compact heap (113) and keep away from curved piece (12).