Fireproof gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to a fireproof gate valve. The utility model provides a fireproof gate valve which is installed on a medium conveying pipeline and used for controlling connection and disconnection of the medium conveying pipeline and comprises a frame body, a gate piece, a gate plate, a telescopic piece and two connecting pipes. The gate piece comprises two connecting plates which are oppositely arranged, a gate cavity matched with the gate plate is formed in the gate piece, the gate cavity is located between the two connecting plates, and a round hole is formed in each connecting plate; one ends of the two connecting pipes are connected with the round holes in the corresponding connecting plates in a sealed mode, and the ends, away from the gate pieces, of the connecting pipes are used for being connected with a medium conveying pipeline. Compared with a traditional pneumatic gate valve, the fireproof gate valve does not need to cast parts such as the valve body, the valve rod, the valve seat and the valve element, the structure is simpler, production procedures are few, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a fireproof gate valve. Background Art

[0002] In an ammunition production system, a fireproof valve must be installed on a conveying pipeline for conveying a medium. This is because the conveying pipeline is installed between two production devices. Since the conveyed medium is flammable, when a fire breaks out at one device, if the conveying pipeline is not cut off in time, the fire is likely to burn along the conveying pipeline to another device, causing the fire to spread.

[0003] Currently, the basic fireproof gates are commonly used pneumatic gate valves on the market. However, the structures of the commonly used pneumatic gate valves are complex, resulting in multiple production processes and high production costs. Content of the Utility Model

[0004] (1) The problem to be solved by the utility model is that the fireproof gates used on the medium conveying pipelines in the current ammunition production system are basically commonly used pneumatic gate valves on the market, which have complex structures and high costs.

[0005] (2) Technical Solution

[0006] A fireproof gate valve is installed on a medium conveying pipeline and is used to control the on-off of the medium conveying pipeline. It includes a frame body, a gate orifice member, a gate plate, a telescopic member, and two connecting pipes. The gate orifice member is installed inside the frame body. The gate orifice member includes two oppositely arranged connecting plates and forms a gate cavity adapted to the gate plate inside. The gate cavity is located between the two connecting plates, and a round hole is formed on each of the connecting plates;

[0007] One ends of the two connecting pipes are respectively and sealingly connected to the round holes on the corresponding connecting plates, and the ends of the connecting pipes away from the gate orifice member are used to be connected to the medium conveying pipeline;

[0008] The gate plate is adjustably installed in the gate cavity. When the gate plate is in the first working position, the gate plate cooperates with the gate orifice member to block the two round holes, so that the medium conveying pipeline is in a through state;

[0009] When the gate plate is in the second working position, the gate plate avoids the two round holes, so that the medium conveying pipeline is in an open state;

[0010] The telescopic member is installed on the frame body and is in transmission connection with the gate plate, and is used to drive the gate plate to switch between the first working position and the second working position.

[0011] According to an embodiment of the utility model, a material passing hole is formed on the side surface of the gate plate;

[0012] When the gate plate is in the first working position, the material passing hole on the gate plate communicates with the round hole on the gate port member, so that the medium conveying pipeline is in a through state;

[0013] When the gate plate is in the second working position, the material passing hole on the gate plate is staggered from the round hole on the gate port member, so that the medium conveying pipeline is in an open state.

[0014] According to an embodiment of the present invention, the depth of the gate cavity on the gate port member is less than the height of the gate port member;

[0015] When the gate plate is in the first working position, the lower surface of the gate plate is higher than the round hole on the gate port member, so that the medium conveying pipeline is in a through state;

[0016] When the gate plate is in the second working position, the lower surface of the gate plate is lower than the round hole on the gate port member, so that the medium conveying pipeline is in an open state.

[0017] According to an embodiment of the present invention, at least two steel profiles are welded to the inner wall of the frame body, the two steel profiles are arranged in sequence along the first direction, the gate port member is welded between the two steel profiles, and the first direction is perpendicular to the axial direction of the connecting pipe.

[0018] According to an embodiment of the present invention, the frame body includes four support beams and multiple cross beams, the tops of the four support beams are sequentially connected by cross beams, and the bottoms of the four support beams are sequentially connected by cross beams.

[0019] According to an embodiment of the present invention, at least one sealing ring installation groove is formed around the outer peripheral surface of the gate plate, and a sealing ring is sleeved in the sealing ring installation groove.

[0020] According to an embodiment of the present invention, the telescopic member is a cylinder, a connecting seat is fixedly installed at the output end of the cylinder, and the gate plate is detachably connected to the connecting seat by bolts.

[0021] According to an embodiment of the present invention, flanges are provided at the ends of the connecting pipes away from the frame body, and the flanges are used to connect with the flange members on the medium conveying pipeline.

[0022] According to an embodiment of the present invention, a square plate is provided on the cylinder, and the square plate is detachably connected to the frame body by bolts.

[0023] The beneficial effects of the present invention:

[0024] A fireproof gate valve provided by the utility model, the protection gate valve is installed on the medium conveying pipeline and used to control the on-off of the medium conveying pipeline. It includes a frame body, a gate opening part, a gate plate, a telescopic part and two connecting pipes. The gate opening part is installed inside the frame body. The gate opening part includes two oppositely arranged connecting plates and forms a gate cavity adapted to the gate plate inside. The gate cavity is located between the two connecting plates, and a round hole is formed on each connecting plate; one ends of the two connecting pipes are respectively and hermetically connected to the round holes on the corresponding connecting plates, and the ends of the connecting pipes away from the gate opening part are used to be connected to the medium conveying pipeline; the gate plate is installed in the gate cavity with adjustable position, and when the gate plate is in the first working position, the gate plate cooperates with the gate opening part to block the two round holes, so that the medium conveying pipeline is in a through state; when the gate plate is in the second working position, the gate plate avoids the two round holes, so that the medium conveying pipeline is in an open state; the telescopic part is installed on the frame body and is in transmission connection with the gate plate, and is used to drive the gate plate to switch between the first working position and the second working position.

[0025] When the medium conveying pipeline is in the working state, the gate plate is in the first working position, and the gate plate cooperates with the gate opening part to block the two round holes, so that the medium conveying pipeline is in a through state, so that the medium can be conveyed from the previous device to the next device along the medium conveying pipeline. When a fire breaks out in one device, the telescopic part drives the gate plate to switch to the second working position, and the gate plate avoids the two round holes, so that the medium conveying pipeline is in an open state.

[0026] In this way, the front and rear two devices are isolated, avoiding the fire from burning along the medium conveying pipeline to another device and causing the fire to spread, thereby improving the safety of the ammunition production system. Moreover, compared with the traditional pneumatic gate valve, this fireproof gate valve does not need to cast components such as valve bodies, valve stems, valve seats and valve cores, has a simpler structure, fewer production processes, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Structural diagram of the fireproof gate valve provided in Embodiment 1 of the present utility model;

[0029] Figure 2 Cross-sectional view of the fireproof gate valve provided in Embodiment 1 of the present utility model;

[0030] Figure 3 Structural diagram of the gate opening part and the gate plate provided in Embodiment 1 of the present utility model;

[0031] Figure 4 Structural diagram of the frame body provided in the first embodiment of the present utility model;

[0032] Figure 5 Structural diagram of the fire damper valve provided in the second embodiment of the present utility model;

[0033] Figure 6 Cross-sectional view of the fire damper valve provided in the second embodiment of the present utility model;

[0034] Figure 7 Structural diagram of the cylinder, gate plate and gate port member provided in the second embodiment of the present utility model;

[0035] Figure 8 Cross-sectional view of the gate port member provided in the second embodiment of the present utility model;

[0036] Figure 9 Structural diagram of the gate plate provided in the second embodiment of the present utility model.

[0037] Icon: 1, frame body; 1, frame body; 101, section steel; 102, support beam; 103, first cross beam; 104, second cross beam; 105, top plate; 2, gate port member; 201, gate cavity; 202, round hole; 3, first connecting pipe; 4, second connecting pipe; 5, cylinder; 501, connecting seat; 6, gate plate; 601, fixing plate; 602, mounting hole; 603, material passing hole; 604, sealing ring mounting groove; 7, flange; 8, sealing ring. Specific embodiments

[0038] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0039] Embodiment 1:

[0040] As Figures 1-4 shown, the first embodiment of the present utility model provides a fire damper valve, which is installed on the medium conveying pipeline and used to control the on-off of the medium conveying pipeline. It includes a frame body 1, a gate port member 2, a gate plate 6, a telescopic member and two connecting pipes. The gate port member 2 is installed inside the frame body 1. The gate port member 2 includes two oppositely arranged connecting plates and forms a gate cavity 201 adapted to the gate plate 6 inside. The gate cavity 201 is located between the two connecting plates, and a round hole 202 is opened on each connecting plate;

[0041] One end of each of the two connecting pipes is hermetically connected to the circular holes 202 on the corresponding connecting plate, and the end of the connecting pipe away from the gate member 2 is used to be connected to a medium conveying pipeline;

[0042] The gate plate 6 is adjustably installed in the gate cavity 201. When the gate plate 6 is in the first working position, the gate plate 6 cooperates with the gate member 2 to block the two circular holes 202, so that the medium conveying pipeline is in a through state;

[0043] When the gate plate 6 is in the second working position, the gate plate 6 avoids the two circular holes 202, so that the medium conveying pipeline is in an open circuit state;

[0044] The telescopic member is installed on the frame 1 and is in driving connection with the gate plate 6, and is used to drive the gate plate 6 to switch between the first working position and the second working position.

[0045] In this embodiment, one end of a connecting pipe away from the gate member 2 is connected to one end of a medium conveying pipeline, and one end of the other connecting pipe to the gate member 2 is connected to one end of the other medium conveying pipeline, so as to install this fire damper valve between two medium conveying pipelines.

[0046] When the medium conveying pipeline is in a working state, at this time the gate plate 6 is in the first working position, and the gate plate 6 cooperates with the gate member 2 to block the two circular holes 202, so that the medium conveying pipeline is in a through state, so that the medium can be conveyed from the previous device to the next device along the medium conveying pipeline.

[0047] When a fire breaks out in one device, the telescopic member drives the gate plate 6 to switch to the second working position, and the gate plate 6 avoids the two circular holes 202, so that the medium conveying pipeline is in an open circuit state. In this way, the front and rear two devices are isolated, preventing the fire from burning along the medium conveying pipeline to another device and causing the fire to spread, thereby improving the safety of the ammunition production system. Moreover, compared with the traditional pneumatic gate valve, this fire damper valve does not need to cast components such as the valve body, valve stem, valve seat and valve core, has a simpler structure, fewer production processes, and reduces costs.

[0048] It should be noted that the medium conveyed in the medium conveying pipeline can be specifically divided into two categories. The first category is particles or powders. The second category is liquids. The fire damper valve in the first embodiment of the present invention is applied to convey particles or powders.

[0049] As a preferred embodiment, such as Figure 4As shown in the figure, the housing 1 has a rectangular frame structure, which includes a top plate 105, four support beams 102, four first cross beams 103 and four second cross beams 104. The tops of the four support beams 102 are welded to the four corners at the bottom of the top plate 105. The four first cross beams 103 are sequentially welded between the side walls at the tops of the four support beams 102, and the four second cross beams 104 are sequentially welded between the side walls at the bottoms of the four support beams 102.

[0050] Furthermore, the housing 1 further includes multiple steel profiles 101. Multiple steel profiles 101 are welded between the two support beams 102 in front of the housing 1, and multiple steel profiles 101 are also welded between the two support beams 102 at the back of the housing 1.

[0051] Preferably, as Figure 1 and Figure 2 shown in the figure, the gate member 2 is fixed between the steel profiles 101 in front of and at the back of the housing 1. The gate member 2 has a rectangular plate shape in appearance and is vertically installed between the steel profiles 101 in front of and at the back of the housing 1. The gate cavity 201 extends from the upper surface of the gate member 2 towards its bottom surface to form a gate cavity 201 with an open top. The above two connecting plates are the side plates on the left and right sides of the gate member 2. The gate cavity 201 is located between the two connecting plates, and a circular hole 202 is provided on each connecting plate. Furthermore, the two connecting pipes are the first connecting pipe 3 and the second connecting pipe 4 in sequence. One end of the first connecting pipe 3 is hermetically connected to the circular hole 202 on the left side surface of the gate member 2, and one end of the second connecting pipe 4 is hermetically connected to the circular hole 202 on the right side surface of the gate member 2. It should be noted that flanges 7 are provided at the ends of the first connecting pipe 3 and the second connecting pipe 4 away from the housing 1, and the flanges 7 are used to connect to the flange members on the medium conveying pipeline.

[0052] As a preferred embodiment, as Figure 2 and Figure 3 shown in the figure, the gate plate 6 is matched with the gate cavity 201. A material passing hole 603 is provided at a position near the bottom on the side of the gate plate 6. The upper half of the gate plate 6 is a blocking area, and the circular hole 202 on the side surface of the gate member 2 is close to the top of the gate member 2.

[0053] In this way, when the telescopic member drives the gate plate 6 to move downward so that the material passing hole 603 on the gate plate 6 moves below the circular hole 202 on the gate member 2 until the material passing hole 603 on the gate plate 6 and the circular hole 202 on the gate member 2 are completely staggered, the gate plate 6 is at the second working position at this time, that is, the first connecting pipe 3 and the second connecting pipe 4 are not connected at this time, so that the fire damper valve is in an open circuit state.

[0054] When the telescopic member drives the gate plate 6 to move upward so that the material passing hole 603 on the gate plate 6 just coincides with the circular hole 202 on the gate port member 2, the material passing hole 603 on the gate plate 6 is communicated with the circular hole 202 on the gate port member 2 at this time. The gate plate 6 is in the first working position at this time, that is, the first connecting pipe 3 and the second connecting pipe 4 are communicated at this time, so that the fire damper is in the passage state.

[0055] It should be noted that the diameters of the material passing hole 603 on the gate plate 6 and the circular hole 202 on the gate port member 2 are the same, that is, when the axis of the material passing hole 603 on the gate plate 6 moves to be collinear with the axis of the circular hole 202 on the gate port member 2, the material passing hole 603 and the circular hole 202 are just completely communicated at this time.

[0056] Optionally, in order to further improve the sealing performance between the material passing hole 603 and the circular hole 202, a sealing ring 8 is installed on each of the left and right sides of the gate plate 6. The sealing ring 8 is coaxially arranged with the circular hole 202. In this way, when the material passing hole 603 on the gate plate 6 just coincides with the circular hole 202 on the gate port member 2, the sealing rings 8 on both sides of the gate plate 6 just fit tightly with the circular hole 202 on the gate port member 2, thereby improving the sealing performance.

[0057] As an optional embodiment, as Figure 3 shown, two sealing ring mounting grooves 604 are formed on the outer peripheral surface of the gate plate 6. The two sealing ring mounting grooves 604 are located above the material passing hole 603. Specifically, one sealing ring mounting groove 604 is arranged on the outer peripheral surface of the gate plate 6 near its top, and the other sealing ring mounting groove 604 is close to the material passing hole 603. Further, a sealing ring 8 is sleeved in each sealing ring mounting groove 604. For the convenience of description, the sealing ring 8 close to the top of the gate plate 6 is named the first sealing ring, and the sealing ring 8 close to the material passing hole 603 is named the second sealing ring.

[0058] In this way, when the fire damper controls the medium conveying pipeline to be in the passage state, the telescopic member drives the gate plate 6 to move upward at this time so that the material passing hole 603 on the gate plate 6 just coincides with the circular hole 202 on the gate port member 2. At this time, the first sealing ring moves out of the gate cavity 201, while the second sealing ring is still located in the gate cavity 201, playing a role in blocking the tiny gap between the gate plate 6 and the inner wall of the gate cavity 201.

[0059] When the fire damper controls the medium conveying pipeline to be in the open state, the telescopic member drives the gate plate 6 to move downward at this time so that the material passing hole 603 on the gate plate 6 is staggered from the circular hole 202 on the gate port member 2. At this time, the first sealing ring closely adheres to the inner wall of the gate cavity 201 near the top, playing a role in blocking the tiny gap between the gate plate 6 and the inner wall of the gate cavity 201.

[0060] As a preferred embodiment, as Figure 1 and Figure 2As shown, the telescopic member is a cylinder 5, which is vertically installed on the top plate 105 of the frame 1. A square plate is fixedly connected to the circumferential surface of the cylinder 5, and the square plate is connected to the top plate 105 of the frame 1 by bolts or screws.

[0061] Furthermore, the output end of the cylinder 5 extends into the interior of the frame 1, and a connecting seat 501 is fixedly installed at the output end of the cylinder 5. The top of the gate plate 6 is detachably connected to the connecting seat 501 by bolts to facilitate subsequent cleaning or replacement of the gate plate 6. Among them, the gate plate 6 is located directly above the gate member 2 so that when the cylinder 5 expands and contracts, it can drive the gate plate 6 to move up and down in the gate cavity 201 of the gate member 2.

[0062] As Figure 2 shown, the gate plate 6 includes a fixing plate 601, which is located at the middle position of the top of the gate plate 6. An installation hole 602 is opened on the fixing plate 601. After the fixing plate 601 extends into the connecting seat 501, bolts are used to pass through the through holes on the connecting seat 501 and the installation hole 602 on the fixing plate 601 and then locked with nuts.

[0063] In the fire damper valve of this embodiment, the frame 1 itself is formed by welding the section steel 101, the support beam 102, the first cross beam 103 and the second cross beam 104. The gate member 2 is manufactured by milling, and the connecting pipe is also connected to the gate member 2 by welding. The gate plate 6 itself is manufactured by machining. It can be seen that the structure of this fire damper valve is simple, and compared with the traditional pneumatic damper valve that uses the casting method to manufacture the valve body and valve seat, this fire damper valve is simpler to process and has a lower cost.

[0064] Preferably, the gate plate 6 is made of brass, and other structural parts, such as the frame 1, the connecting pipe, the connecting seat 501, and the gate member 2, are all made of 304 stainless steel, which plays a role in preventing combustion and has high strength.

[0065] Embodiment Two:

[0066] As Figures 5-9 shown, Embodiment Two of the present utility model provides another fire damper valve, which is mainly applied to the medium transmission pipeline for transporting liquid media. The main difference from Embodiment One is that the structures of the gate member 2 and the gate plate 6 are different.

[0067] The main differences are as follows. First, as Figure 6 , Figure 7 and Figure 8 shown, the height of the gate member 2 is less than the height of the gate member 2 in the above Embodiment One, so that the depth of the gate cavity 201 on the gate member 2 is less than the depth of the gate cavity 201 in Embodiment One. Second, the gate plate 6 in this embodiment is as Figure 9As shown, there is no material passing hole 603 provided on the gate plate 6, and the length of the gate plate 6 is shorter.

[0068] When the gate plate 6 in the fire damper valve in the second embodiment is in the first working position, the lower surface of the gate plate 6 at this time is higher than the round hole 202 on the gate port member 2, so that the medium conveying pipeline is in a through state. That is, the gate plate 6 moves above the round hole 202 on the gate port member 2 and no longer blocks the space between the two round holes 202. In this way, the liquid medium enters the first connecting pipe 3 and then flows into the gate cavity 201, and then flows into the second connecting pipe 4.

[0069] When the gate plate 6 in the fire damper valve is in the second working position, the lower surface of the gate plate 6 at this time is lower than the round hole 202 on the gate port member 2, so that the medium conveying pipeline is in a through state.

[0070] Specifically, when the fire damper valve is in the blocked state, the lower surface of the gate plate 6 at this time is below the round hole 202 on the gate port member 2. Also, since the length of the gate plate 6 is greater than the depth of the gate cavity 201, the space between the two round holes 202 in the gate cavity 201 is blocked by the gate plate 6, thus cutting off the two connecting pipes.

[0071] When it is necessary to open the protection damper valve, after the telescopic member receives the instruction, it drives the gate plate 6 to move upward until the lower surface of the gate plate 6 is higher than the round hole 202 on the gate port member 2. At this time, the gate plate 6 is completely staggered from the round hole 202, and the gate plate 6 no longer blocks the space between the two round holes 202, so that the gate cavity 201 and the two connecting pipes are in a communicating state. In this way, the liquid medium can flow from one connecting pipe into the gate cavity 201 and then from the gate cavity 201 into the other connecting pipe.

[0072] It should be noted that the reason why the fire damper valve in the second embodiment is not suitable for transporting granular or powdered media is that when the fire damper valve is in the open state, the lower surface of the gate plate 6 at this time is higher than the round hole 202 on the gate port member 2. After the granular or powdered media enter the gate cavity 201, a small amount of granular or powdered media may remain in the corner of the gate cavity 201, that is, it is difficult for the granular or powdered media to all flow out from one connecting pipe into the other connecting pipe.

[0073] As a preferred embodiment, as Figure 9As shown in the figure, a sealing ring installation groove 604 is formed on the outer peripheral surface of the gate plate 6. The sealing ring installation groove 604 is close to the bottom of the gate plate 6, and a sealing ring 8 is sleeved in the sealing ring installation groove 604. Since the bottom of the gate member 2 is sealed and the gate chamber 201 only has an opening at the top, the liquid medium may flow out from the tiny gap between the gate plate 6 and the inner wall of the gate chamber 201 to the opening of the gate chamber 201. Therefore, the sealing ring 8 is installed. When the fire damper valve is in the open state, the gate plate 6 moves above the round hole 202 of the gate member 2, so that the sealing ring 8 also moves above the round hole 202 of the gate member 2. In this way, the sealing ring 8 blocks the tiny gap between the gate plate 6 and the inner wall of the gate chamber 201, making it difficult for the liquid medium in the gate chamber 201 to overflow and improving the sealing performance. Of course, multiple sealing ring installation grooves 604 can be provided on the outer peripheral surface of the gate plate 6. The multiple sealing ring installation grooves 604 are arranged in sequence along the height direction of the gate plate 6, and a sealing ring 8 is sleeved in each sealing ring installation groove 604 to further enhance the sealing performance.

[0074] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0075] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, in the description of the present invention, unless otherwise stated, the meaning of "multiple" is two or more.

[0076] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fire damper valve, which is installed on a medium conveying pipeline and is used to control the on-off of the medium conveying pipeline, characterized in that, The invention comprises a frame (1), a gate member (2), a gate plate (6), a telescopic member and two connecting pipes, wherein the gate member (2) is installed inside the frame (1), the gate member (2) comprises two connecting plates arranged opposite to each other, and a gate cavity (201) is formed inside the gate member to match the gate plate (6), the gate cavity (201) is located between the two connecting plates, and each connecting plate is provided with a circular hole (202); One end of the two connecting pipes is respectively sealed and connected to the circular hole (202) on the corresponding connecting plate, and one end of the connecting pipe away from the gate member (2) is used to be connected to a medium conveying pipeline; The gate plate (6) is installed in the gate chamber (201) in an adjustable manner, and when the gate plate (6) is in the first working position, the gate plate (6) cooperates with the gate member (2) to block the two circular holes (202), so that the medium conveying pipeline is in a passage state; When the gate plate (6) is in the second working position, the gate plate (6) avoids the two circular holes (202), so that the medium conveying pipeline is in a disconnected state; The telescopic member is mounted on the frame (1) and is transmission-connected to the gate plate (6), and is used to drive the gate plate (6) to switch between the first working position and the second working position.

2. The fire damper valve according to claim 1, wherein, A material passage hole (603) is provided on the side surface of the gate plate (6); When the gate plate (6) is in the first working position, the material passage hole (603) on the gate plate (6) is connected to the circular hole (202) on the gate member (2), so that the medium conveying pipeline is in a passage state; When the gate plate (6) is in the second working position, the material passage hole (603) on the gate plate (6) and the circular hole (202) on the gate member (2) are staggered, so that the medium conveying pipeline is in a disconnected state.

3. A fire damper valve according to claim 1, characterized in that, The depth of the gate cavity (201) on the gate member (2) is smaller than the height of the gate member (2); When the gate plate (6) is in the first working position, the lower surface of the gate plate (6) is higher than the circular hole (202) on the gate member (2), so that the medium conveying pipeline is in a passage state; When the gate plate (6) is in the second working position, the lower surface of the gate plate (6) is lower than the circular hole (202) on the gate member (2), so that the medium conveying pipeline is in a disconnected state.

4. A fire damper valve according to claim 1, characterized in that, At least two steel sections (101) are welded to the inner wall of the frame (1), the two steel sections (101) are arranged in sequence along a first direction, the gate member (2) is welded between the two steel sections (101), and the first direction is perpendicular to the axial direction of the connecting pipe.

5. A fire damper valve according to claim 4, characterized in that, The frame (1) comprises four support beams (102) and a plurality of cross beams, the top ends of the four support beams (102) are connected in sequence via the cross beams, and the bottom ends of the four support beams (102) are connected in sequence via the cross beams.

6. A fire damper valve according to claim 2 or 3, characterized in that, At least one sealing ring installation groove (604) is provided on the gate plate (6) around its outer circumference, and a sealing ring (8) is sleeved in the sealing ring installation groove (604).

7. A fire damper valve according to claim 1, characterized in that, The telescopic member is a cylinder (5), and a connecting seat (501) is fixedly installed at the output end of the cylinder (5). The gate plate (6) is detachably connected to the connecting seat (501) by bolts.

8. A fire damper valve according to claim 1, wherein, Flanges (7) are provided at the ends of the connecting pipes away from the frame body (1). The flanges (7) are used to connect to the flange members on the medium conveying pipeline.

9. A fire damper valve according to claim 7, characterized in that, A square plate is provided on the cylinder (5). The square plate is detachably connected to the frame body (1) by bolts.

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