CN211371388U - Fireproof check valve with butterfly-shaped fireproof temperature sensing device - Google Patents

Abstract

The utility model discloses a take fire prevention check valve of butterfly fire prevention temperature sensing device includes that metal cylinder, symmetrical position can run from opposite directions the check door plant that opens in the metal cylinder and be located the butterfly fire prevention temperature sensing device of the symmetry axis top of two check door plants, butterfly fire prevention temperature sensing device includes that one spanes valve body mouth and middle part and has a crossbeam of bellied bow-shaped structure that makes progress to and wear to establish the location axle on the bow-shaped structure, should fix a position epaxial symmetry and wear to be equipped with two swinging booms and with the torsional spring, the one end butt of this torsional spring is on the swinging boom, and the other end butt is on the bow-shaped structure, is connected through two bonded fuse links mutually between two swinging booms simultaneously. The utility model discloses in utilize the design of torsional spring and swinging boom, rotate along the location axle under the torsion effect of torsional spring as the swinging boom, initial condition makes progress the rotation and keeps away from the check door plant and detain on the check door plant to the rotatory pressure of lapse under, makes the valve closely closed realization fire prevention isolation function.

Description

Fireproof check valve with butterfly-shaped fireproof temperature sensing device

Technical Field

The utility model relates to a check valve especially relates to a take fire prevention check valve of butterfly fire prevention temperature sensing device.

Background

The check valve used for the direct drainage of the public flue or the outer wall has higher requirements on the opening effect, the fireproof performance, the sealing effect and the like of the check door plate, but the existing check valve has many defects, for example, the check door plate rotates around the connecting shaft, and the contact surface of the connecting shaft is large, so that oil stains are easily adhered to the check door plate, and the check door plate is often clamped in the rotating process in the using process, so that only a part of the check door plate can be opened, and the check door plate cannot be completely opened or can not be completely returned, thereby influencing the ventilation effect and the effect of preventing smoke return within the same time; in addition, although the fireproof device is arranged, the structure is complex, the manufacturing cost is high, the failure is easy, and the fireproof performance is poor; meanwhile, the phenomenon of odor tainting of the flue sometimes occurs, and the indoor environment is full of peculiar smell, which seriously affects the health of family members.

Therefore, it is desired to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a reliable performance is difficult for taking fire prevention check valve of butterfly fire prevention temperature sensing device that became invalid.

The technical scheme is as follows: in order to achieve the above object, the utility model discloses a fire-proof check valve with a butterfly-shaped fire-proof temperature sensing device, which comprises a metal cylinder, check door plates symmetrically arranged in the metal cylinder and capable of being opened oppositely, and the butterfly-shaped fire-proof temperature sensing device arranged in the metal cylinder and above the symmetry axis of the two check door plates, wherein the butterfly-shaped fire-proof temperature sensing device comprises a beam crossing over a valve body opening and having an upward convex arch structure in the middle, and a positioning shaft arranged on the arch structure in a penetrating way, two rotating arms capable of rotating around the positioning shaft and torsion springs arranged in one-to-one correspondence with the rotating arms are symmetrically arranged on the positioning shaft, one end of each torsion spring is abutted against the corresponding rotating arm, the other end of each torsion spring is abutted against the arch structure, and the two rotating arms are connected through two; when the external temperature reaches a certain temperature, the two adhered fuse links are separated, and the rotating arm which rotates upwards and is far away from the check door plate rotates downwards around the positioning shaft under the torsion action of the torsion spring in an initial state and is pressed and buckled on the check door plate, so that the valve is closed to realize the fireproof isolation function. The utility model discloses in utilize the design of torsional spring and swinging boom, rotate along the location axle under the torsion effect of torsional spring as the swinging boom, initial condition makes progress the rotation and keeps away from the check door plant and detain on the check door plant to the rotatory pressure of lapse under, makes the valve closely closed realization fire prevention isolation function.

The positioning piece comprises a positioning plate, a positioning groove positioned on the positioning plate, a positioning rod used for driving the positioning piece to move and one-way positioning pieces obliquely arranged on the positioning plate and in one-to-one correspondence with the rotating arms, the rotating arms are provided with one-way positioning tooth sockets clamped with the one-way positioning pieces, the arch structure is provided with a guide groove used for guiding the positioning rod and a positioning hole used for connecting and fixing the positioning plate, and bolts penetrate through the positioning hole and the positioning groove; the one-way locating piece slides along one-way location tooth's socket unilateral in the rotatory in-process down of swinging boom, and one-way locating piece block is in one-way location tooth's socket when the swinging boom stops to rotate and press the lock at check door plant, and the one-way spacing card of swinging boom dies. The utility model discloses the one-way spacer on the setting element that the crossbeam removed can be followed to the utilization and the integrated configuration design of the one-way location tooth's socket looks block on the swinging boom, realizes the spacing card dead function of swinging boom, avoids the impact force drive swinging boom rotation that the flue produced to open the non return door plant.

Preferably, a reserved positioning hole and a reserved positioning groove for fixing the bolt in a penetrating mode are further formed in the arch structure and the positioning piece respectively.

Furthermore, the front end of swinging boom is equipped with the jack catch, the non return door plant is equipped with the draw-in groove with jack catch looks adaptation.

Furthermore, an auxiliary clamping jaw positioned at the rear side of the clamping jaw is also arranged on the rotating arm. The utility model discloses utilize jack catch and supplementary jack catch to form as 2 punishment's suppression power on the non return door plant, make the non return door plant closely closed more.

Preferably, the rotating arm is provided with a connecting groove for connecting a fuse link, and the fuse link comprises a connecting portion inserted into the connecting groove, an adhering portion for adhering, and a transition portion for connecting the adhering portion and the connecting portion.

Furthermore, a metal non-return door frame is obliquely arranged on the inner wall or the end part of the metal cylinder, and the two non-return door plates are symmetrically arranged on the metal non-return door frame.

Further, the metal barrel comprises an upper barrel body and a lower barrel body which are sleeved with each other, a lug is arranged on the upper barrel body, an L-shaped groove is formed in the corresponding position of the lower barrel body, the lower barrel body is inserted into the upper barrel body, the lug is inserted into a longitudinal groove of the L-shaped groove, the upper barrel body or the lower barrel body is rotated, and the lug is clamped in a transverse groove of the L-shaped groove and locked.

Preferably, one end of the lower cylinder body is provided with a metal mounting seat, and the metal mounting seat and the lower cylinder body are of a welding forming structure or an integral forming structure.

Furthermore, the metal cylinder is of an integrally formed structure, one end of the metal cylinder is provided with a metal mounting seat, and the metal mounting seat and the metal cylinder are of a welded structure or an integrally formed structure.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:

(1) the utility model utilizes the design of the torsion spring and the rotating arm, when the rotating arm rotates along the positioning shaft under the torsion action of the torsion spring, the rotating arm rotates upwards to be away from the non-return door plate to rotate downwards to be pressed and buckled on the non-return door plate in the initial state, so that the valve is closed tightly to realize the fireproof isolation function;

(2) the check door plate of the utility model is obliquely arranged in the metal cylinder, and the inclined plane gravity generated by the double-open check door plate is beneficial to closing the valve, so as to ensure that the two check door plates are in a closed state when the check valve is not used;

(3) the metal barrel of the utility model is a split type barrel and is formed by sleeving the upper barrel and the lower barrel, when the check valve needs to be cleaned in the use process, only the upper barrel needs to be disassembled without disassembling the lower barrel fixed with the flue, the difficulty of cleaning the check valve is reduced, the split type metal barrel is convenient to install and clean, and the barrel lifting rejection rate in the production process is reduced;

(4) the utility model realizes the one-way limiting and locking function of the rotary arm by utilizing the combined structure design that the one-way positioning piece on the positioning piece which can move along the beam is clamped with the one-way positioning tooth socket on the rotary arm, and avoids the impact force generated by the flue to drive the rotary arm to rotate, thereby opening the check door plate;

(5) the utility model discloses utilize jack catch and supplementary jack catch to form as the 2 suppression power on the non return door plant, make the non return door plant closely closed more.

Drawings

Fig. 1 is a schematic structural view of a fire check valve in embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a fireproof temperature-sensing device in embodiment 1 of the present invention;

fig. 3 is a schematic view of the connection between the cross beam and the positioning member in embodiment 1 of the present invention;

fig. 4 is a schematic structural view of a positioning member in embodiment 1 of the present invention;

fig. 5 is a schematic view of the connection between the rotating arm and the torsion spring in embodiment 1 of the present invention;

fig. 6 is a schematic structural view of a metal cylinder in embodiment 1 of the present invention;

fig. 7 is a schematic structural view of the fire check valve in embodiment 1 of the present invention in a closed state;

fig. 8 is a schematic structural view of the fire-proof temperature sensing device in embodiment 1 of the present invention in a closed state;

fig. 9 is an installation schematic view of a check door panel in embodiment 1 of the present invention;

fig. 10 is a schematic structural view of a check door panel in embodiment 1 of the present invention;

fig. 11 is a top view of a check door panel according to embodiment 1 of the present invention;

fig. 12 is a schematic structural view of a metal cylinder in embodiment 2 of the present invention;

fig. 13 is a schematic structural view of a fire check valve in embodiment 3 of the present invention;

fig. 14 is a schematic structural view of a metal cylinder in embodiment 3 of the present invention;

fig. 15 is a schematic connection diagram of the reducing sleeve in embodiment 3 of the present invention;

fig. 16 is a schematic structural view of the fire check valve in the closed state according to embodiment 3 of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, the utility model discloses a take fire prevention check valve of butterfly fire prevention temperature sensing device, including metal barrel 1, non return door plant 2, butterfly fire prevention temperature sensing device, metal non return door frame 10 and metal mount pad 11.

As shown in fig. 6, the metal cylinder 1 includes an upper cylinder 101 and a lower cylinder 102 which are sleeved with each other, a protrusion 103 is disposed on the upper cylinder 101, an L-shaped groove 104 is disposed at a corresponding position on the lower cylinder 102, the lower cylinder 102 is inserted into the upper cylinder 101, the protrusion 103 is inserted into a longitudinal groove of the L-shaped groove 104, the upper cylinder 101 or the lower cylinder 102 is rotated, and the protrusion 103 is locked in a transverse groove of the L-shaped groove 104. One end of the lower cylinder 102 is provided with a metal mounting seat 11, the metal mounting seat 11 and the lower cylinder 102 are of a welded structure or an integrated structure, and the metal mounting seat 11 is provided with a connecting U-shaped groove or a waist-shaped hole so as to fixedly mount the check valve by installing an expansion screw or fixedly mount the check valve by other methods. Wherein, the structure that barrel and lower barrel were established each other is adopted to metal barrel 1, has avoided the barrel because of the problem that the barrel draws high disability rate in the product production process that many times stretch forming technology caused, simultaneously in the use when needs wash the check valve, only need dismantle the barrel can, and need not to dismantle with the fixed lower barrel of flue and open, reduce the degree of difficulty of wasing the check valve, split type easy to assemble and convenient washing.

As shown in fig. 9, 10 and 11, a metal check door frame 10 is obliquely arranged on the inner wall of the upper cylinder 101 of the metal cylinder 1, and two check door panels 2 are symmetrically arranged on the metal check door frame 10. The metal non-return door frame 10 includes the circle frame 1001 that is fixed in the metal cylinder inner wall and the central door frame 1002 that is located the circle frame symmetry axis department, and the side of circle frame 1001 and central door frame 1002 is blade form side, and this blade form side passes through D shape silica gel sealing washer 204 with the blade form of non-return door board and realizes effective sealing. The check door plate 2 comprises an upper door plate 202 and a lower door plate 203, and a clamping groove 201 matched with the clamping claw 502 is formed in the upper door plate 202 of the check door plate 2. The peripheries of the upper door panel 202 and the lower door panel 203 are punched in a blade shape, and the upper door panel 202 and the lower door panel 203 are fixedly connected to each other by rivets or bolts. And D-shaped silica gel sealing rings 204 for sealing the valve body opening are buckled and pressed at the peripheries of the upper door panel 202 and the lower door panel 203. The upper door panel 202 and the lower door panel 203 are both D-shaped metal plates, which include a straight edge and a circular edge. The two end portions of the straight edge of the upper door panel 202 are respectively bent around themselves to form a central door shaft 205, and the upper door panel 202 drives the lower door panel to rotate around the central door shaft 205 formed by bending itself. Hinges 12 are respectively provided on the valve body near both ends of the central door shaft 205, fixing catches 13 for fixing the central door shaft 205 are provided on the hinges 12, and the upper door plate 202 is connected with the hinges 12 and the fixing catches 13 on the valve body through the central door shaft 205. This non return door plant 2 realizes nimble rotation through the central door-hinge that self bent the formation, reduces greasy dirt or dust in the use to the influence of rotation flexibility ratio, and design benefit can open and close completely, improves ventilation effect. The plane of the non-return door plate 2 and the vertical direction form an included angle of 25-40 degrees, so that when the fireproof check valve and the butterfly-shaped fireproof temperature sensing device are not used, the two non-return door plates lean against the metal non-return door frame 10 under the action of gravity, and therefore the fireproof check valve with the butterfly-shaped fireproof temperature sensing device is in a closed state.

The butterfly-shaped fireproof temperature sensing device is positioned in the metal cylinder 1 and above the symmetry axis of the two check door plates 2. The butterfly-shaped fireproof temperature sensing device is arranged in the middle, and the movement of the check door plate 2 is not influenced. Meanwhile, the non-return door plate 2 in an open state can be completely accommodated by the height of the metal cylinder body 1, the fireproof temperature sensing device is protected from being damaged, the fireproof reliability of the non-return door plate is enhanced, meanwhile, the situation that strong wind and foreign matters at the inner wall or the outer wall of a flue block the opening of the metal non-return door plate is avoided, and the reliability of the fireproof check valve with the butterfly-shaped fireproof temperature sensing device and the fireproof temperature sensing device is further guaranteed.

The butterfly-shaped fireproof temperature sensing device comprises a beam 3, a positioning shaft 4, a rotating arm 5, a torsion spring 6, a fuse link 7, a positioning piece 8, a bolt 9 and a spacer 14. The beam 3 is a bending plate crossing the valve body opening, the bending plate comprises a beam connecting part 305 fixed with the inner side of the upper cylinder 101 of the metal cylinder 1 and a beam part 306 parallel to the symmetry axis of the check door plate, the beam part 306 is provided with an arch structure 301 protruding upwards, and the side edge of the beam 3 in the length direction is provided with a folding edge 307 for strengthening. The location axle 4 is worn to establish at bow-shaped structure 301 and fixed through bolt 15, and two swinging boom 5 symmetries are worn to establish on location axle 4, still wear to be equipped with spacer 14 on being located the location axle 4 between two swinging boom 5 simultaneously, and two swinging boom of isolation can be played to this spacer 14, prevent swinging boom mutual interference. The rotating arm 5 comprises a rotating plate 505 and connecting lugs 506 which are positioned at two sides of the rotating plate 505 and are used for penetrating the positioning shaft 4, and a unidirectional positioning tooth socket 501 used for limiting the rotating arm is arranged on the connecting lug 506 close to the other rotating arm 5. As shown in fig. 5, a claw 502 is provided at the front end of the rotating plate 505, an auxiliary claw 503 is further provided on the rotating plate 505 located at the rear side of the claw 502, and a connecting groove 504 for connecting the fuse link 7 is further provided on the rotating plate 505. The torsion spring 6 is arranged on the positioning shaft 4 between the connecting lugs at the two sides of the rotating arm 5 in a penetrating way, one end of the torsion spring 6 is abutted against the rotating plate 505, and the other end is abutted against the arch structure 301. Two fuse links 7 one end bonds each other, and the other end is connected with the spread groove 504 of swinging boom 5 respectively, and fuse link 7 uses copper sheet or steel sheet including connecting portion 701 that inserts spread groove 504, the portion of bonding 702 that is used for the bonding and the transition portion 703 that is used for connecting bonding portion and connecting portion, and the fuse link at this place, and standard melting point control by temperature change accords with the national fire department and approves the standard, and the fuse link breaks off when the operating temperature reaches fusing temperature, and control by temperature change is accurate, and the reaction is sensitive. As shown in fig. 3, the arch structure 301 is connected to a positioning element 8 capable of moving along the arch structure and used for limiting the rotating arm, and as shown in fig. 4, the positioning element 8 includes a positioning plate 801, a positioning groove 802 located on the positioning plate, a reserved positioning groove 805 located on the positioning plate, a positioning rod 803 used for driving the positioning element to move, and a one-way positioning piece 804 obliquely disposed on the positioning plate and corresponding to the one-way positioning tooth socket 501 on the rotating arm one by one. The arch structure 301 is provided with a guide groove 302 for guiding the positioning rod, a positioning hole 303 for connecting and fixing the positioning plate and a reserved positioning hole 304 for fixing a penetrating bolt, and the positioning hole 303 and the positioning hole 802 are penetrated with a bolt 9; the unidirectional locating piece slides along the unidirectional locating tooth groove in a unidirectional way in the downward rotation process of the rotating arm, when the rotating arm stops rotating and is pressed and buckled on the non-return door plate, the unidirectional locating piece is clamped in the unidirectional locating tooth groove, and the rotating arm is clamped in a unidirectional limiting way, as shown in fig. 7 and 8; if necessary, the positioning rod is pulled to move the positioning piece until the unidirectional positioning piece is separated from the unidirectional positioning tooth groove, the rotating arm rotates upwards to reset, and then the positioning rod is pulled to move the positioning piece to return to the initial state.

The working process is as follows: firstly, a fireproof check valve with a butterfly-shaped fireproof temperature sensing device is additionally arranged on a wall surface, and the installation position of the fireproof check valve is adjusted. When a fireproof check valve with a butterfly-shaped fireproof temperature sensing device is opened, two check door plates are completely opened to discharge waste gas; when the fireproof check valve with the butterfly-shaped fireproof temperature sensing device is closed, the check door plate obliquely falls back on the metal check door frame by means of self gravity; when the temperature in the flue is too high, the two adhered fuse links are separated, the rotating arm which rotates upwards and is far away from the check door plate in the initial state rotates downwards around the positioning shaft under the action of the torsion force of the torsion spring and is pressed and buckled on the check door plate, and the positioning piece locks the rotating arm, so that the check door plate is firmly closed to avoid the spread of fire.

The product has the following application:

can be used in a public flue: the fireproof check valve with the butterfly-shaped fireproof temperature sensing device is used for discharging oil fume and preventing smoke from returning in a common flue of a household kitchen, a fireproof system, a kitchen range hood exhausts air, the common flue is fireproof and is normally closed at ordinary times, peculiar smell brought in the common flue is prevented, smell fleeing is avoided, and the health of family people is cared; when the range hood works, the fireproof check valve with the butterfly-shaped fireproof temperature sensing device and the door plate of the fireproof temperature sensing device are opened greatly, are in an 'open' state, have large caliber and discharge smoke smoothly without obstruction, and when the air temperature reaches fusing temperature, the fuse link of the fireproof check valve with the butterfly-shaped fireproof temperature sensing device acts to automatically close, so that the invasion of external fire is avoided.

Can also be used on the outer wall: the fireproof check valve with the butterfly-shaped fireproof temperature sensing device is used for directly discharging the outer wall, and can effectively prevent small animals, birds, dust and the like from entering the range hood.

Example 2

As shown in fig. 12, the structure of embodiment 2 is the same as that of embodiment 1 except that: the metal cylinder 1 is an integrated structure, a metal mounting seat 11 is arranged at one end of the metal cylinder 1, and the metal mounting seat 11 and the metal cylinder 1 are of a welding structure or an integrated structure.

Example 3

As shown in fig. 13, 14, 15, and 16, the structure of embodiment 3 is the same as that of embodiment 1, except that: the end of the upper cylinder 101 of the metal cylinder 1 is obliquely provided with a metal non-return door frame 10, and the two non-return door panels 2 are symmetrically arranged on the metal non-return door frame 10. When in use, the upper cylinder 101 of the metal cylinder 1 is sleeved with the reducing sleeve 16 for connecting with a wall body. In addition, both ends of the beam connecting portion 305 are fixedly connected to the metal mounting base 11. The upper door plate 202 of the double-door plate 2 is connected with a clamping plate 17, and clamping grooves 201 matched with the clamping claws 502 are formed in the clamping plate 17.

Claims (10)

1. The utility model provides a take fire prevention check valve of butterfly fire prevention temperature sensing device which characterized in that: the butterfly-shaped fireproof temperature sensing device comprises a metal cylinder body (1), check door plates (2) which are symmetrically arranged in the metal cylinder body and can be oppositely opened, and a butterfly-shaped fireproof temperature sensing device which is arranged in the metal cylinder body and is positioned above a symmetry axis of the two check door plates, wherein the butterfly-shaped fireproof temperature sensing device comprises a cross beam (3) which stretches across a valve body opening and is provided with an upward convex arch structure (301) in the middle, and a positioning shaft (4) which is arranged on the arch structure (301) in a penetrating manner, two rotating arms (5) which can rotate around the positioning shaft and torsion springs (6) which are arranged in one-to-one correspondence with the rotating arms are symmetrically arranged on the positioning shaft (4), one end of each torsion spring (6) is abutted against the corresponding rotating arm (5), the other end of each torsion spring is abutted against the arch structure (301), and meanwhile, the two; when the external temperature reaches a certain temperature, the two adhered fuse links are separated, and the rotating arm which rotates upwards and is far away from the check door plate rotates downwards around the positioning shaft under the torsion action of the torsion spring in an initial state and is pressed and buckled on the check door plate, so that the valve is closed to realize the fireproof isolation function.

2. The fire protection check valve with butterfly fire protection temperature sensing device of claim 1, wherein: the positioning part (8) which can move along the arch structure and is used for limiting the rotating arm is connected to the arch structure (301), the positioning part (8) comprises a positioning plate (801), a positioning groove (802) positioned on the positioning plate, a positioning rod (803) used for driving the positioning part to move and one-way positioning pieces (804) which are obliquely arranged on the positioning plate and correspond to the rotating arm one by one, one-way positioning tooth sockets (501) which are clamped with the one-way positioning pieces are arranged on the rotating arm (5), a guide groove (302) used for guiding the positioning rod and a positioning hole (303) used for connecting and fixing the positioning plate are arranged on the arch structure (301), and bolts (9) are arranged on the positioning hole (303) and the positioning groove (802); the one-way locating piece slides along one-way location tooth's socket unilateral in the rotatory in-process down of swinging boom, and one-way locating piece block is in one-way location tooth's socket when the swinging boom stops to rotate and press the lock at check door plant, and the one-way spacing card of swinging boom dies.

3. The fire protection check valve with butterfly fire protection temperature sensing device of claim 2, wherein: and a reserved positioning hole (304) and a reserved positioning groove (805) for fixing a bolt in a penetrating way are respectively formed in the arch structure (301) and the positioning piece (8).

4. The fire protection check valve with butterfly fire protection temperature sensing device of claim 1, wherein: the front end of the rotating arm (5) is provided with a clamping jaw (502), and the check door plate (2) is provided with a clamping groove (201) matched with the clamping jaw.

5. The fire protection check valve with butterfly fire protection temperature sensing device of claim 4, wherein: the rotating arm (5) is also provided with an auxiliary clamping jaw (503) positioned at the rear side of the clamping jaw (502).

6. The fire protection check valve with butterfly fire protection temperature sensing device of claim 1, wherein: the rotating arm (5) is provided with a connecting groove (504) for connecting a fuse link, and the fuse link (7) comprises a connecting part (701) inserted into the connecting groove (504), an adhering part (702) for adhering and a transition part (703) for connecting the adhering part and the connecting part.

7. The fire protection check valve with butterfly fire protection temperature sensing device of claim 1, wherein: the metal cylinder body (1) inner wall or tip slant is provided with metal non return door frame (10), and two non return door plant (2) symmetry set up on this metal non return door frame (10).

8. The fire protection check valve with butterfly fire protection temperature sensing device of claim 1, wherein: the metal barrel (1) comprises an upper barrel (101) and a lower barrel (102) which are sleeved with each other, a bump (103) is arranged on the upper barrel (101), an L-shaped groove (104) is arranged in a corresponding position on the lower barrel (102), the lower barrel (102) is inserted into the upper barrel (101), the bump (103) is inserted into a longitudinal groove of the L-shaped groove (104), the upper barrel (101) or the lower barrel (102) rotates, and the bump (103) is clamped in a transverse groove of the L-shaped groove (104) and is locked.

9. The fire protection check valve with butterfly fire protection temperature sensing device of claim 8, wherein: one end of the lower cylinder (102) is provided with a metal mounting seat (11), and the metal mounting seat (11) and the lower cylinder (102) are of a welding forming structure or an integral forming structure.

10. The fire protection check valve with butterfly fire protection temperature sensing device of claim 1, wherein: the metal cylinder body (1) is of an integrally formed structure, a metal mounting seat (11) is arranged at one end of the metal cylinder body (1), and the metal mounting seat (11) and the metal cylinder body (1) are of a welded structure or an integrally formed structure.

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