Air and smoke pipeline expansion joint with reinforced sealing structure

Abstract

The invention provides an air and smoke pipeline expansion joint with a reinforced sealing structure, and belongs to the technical field of pipeline expansion joints, the air and smoke pipeline expansion joint comprises a sealing mechanism and a plurality of joint bodies which are connected in series and form the expansion joint, and the sealing mechanism comprises a sealing assembly and a plurality of connecting assemblies. The air and smoke pipeline expansion joint with the reinforced sealing structure has high compensation capacity, can fully meet the requirements for stable operation of a pipeline system and compensation of installation environment errors, and is combined with two groups of joint bodies to form an interaction pressure applying unit through a connecting assembly; when any pressing unit is tensioned, the movable sealing piece in the pressing unit can be pressed, the sealing strength is improved, compression force is generated to act on the movable sealing piece in the other pressing unit, and the stress directions of the movable sealing pieces in the two pressing units are opposite. And the movable sealing piece can quickly respond to tensioning of the expansion joint, the overall sealing strength is improved, a dynamic sealing area with the sealing strength improved in a self-adaptive mode is integrally formed, and the sealing effect of the expansion joint is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline expansion joints, and in particular to an air and smoke pipeline expansion joint with a reinforced sealing structure. Background Art

[0002] The expansion joint of the air and smoke duct (hereinafter referred to as the expansion joint) is a component used to connect the air duct or flue system. It can absorb the expansion and deformation caused by temperature changes, vibration or other factors, ensuring the normal operation and safety of the pipeline system.

[0003] At present, there are two main installation methods for expansion joints, namely independent installation and multiple series installation. The former has a smaller compensation range, poor compensation ability and high precision requirements for the installation environment, making it difficult to compensate for errors in the installation environment. The latter has a larger compensation range and stronger compensation ability, and can compensate for errors in the installation environment within a certain range, which can not only ensure the convenience of the installation process but also fully meet the requirements for stable operation of the pipeline system. However, its sealing performance needs to be further strengthened. The existing expansion joint sealing method usually fixes the seals between adjacent expansion joints. During the tensioning and compression of adjacent expansion joints, the seals only rely on the deformation force of the seals themselves for sealing. During the compression process, the seals are squeezed by the expansion joints to fully form a reliable sealing effect, but during the tensioning process, it is difficult to fully form a reliable sealing effect, especially as the tensioning distance increases, the sealing effect decreases, and leakage is very likely to occur. Moreover, multiple expansion joints in series are prone to form multiple leakage points, which will correspondingly seriously affect the reliability and safety of the pipeline system operation. Summary of the Invention

[0004] The present invention provides an air and smoke duct expansion joint with a reinforced sealing structure to solve the problem in the related art that the expansion joint has a strong compensation capability but a low sealing effect, and is prone to leakage, which affects the reliability and safety of the pipeline system movement.

[0005] The present invention provides an air and smoke duct expansion joint with a reinforced sealing structure, the air and smoke duct expansion joint with a reinforced sealing structure comprises: a plurality of sections connected in series to form the expansion joint, wherein one section serves as an intermediate reference, and the remaining sections are divided into two groups and are respectively located on both sides of the intermediate reference; a sealing mechanism, wherein the sealing mechanism comprises a sealing assembly and a plurality of connecting assemblies, the sealing assembly comprises a fixed sealing member located between opposite ends of adjacent sections and a movable sealing member located between opposite ends of adjacent sections, the two groups of sections on both sides of the intermediate reference constitute two interacting pressure units through the connecting assembly, and tensioning of any one pressure unit will compress the movable sealing member in the pressure unit to increase the sealing strength and generate a compressive force acting on the other On a movable seal in a pressure unit; the connecting component is connected between one group of joints and the movable seal in another group of joints, and the two connecting components form a transmission unit. The connecting component in the transmission unit is not connected to the same group of joints. The connecting component includes an intermediate seat, on which a connecting head and an intermediate conversion member are provided. The connecting heads are respectively located on both sides of the intermediate conversion member, and the connecting head on one side is connected to a group of joints on the corresponding side and is limitedly matched with the movable seal on the corresponding side. The connecting head on the other side is connected to the movable seal on the corresponding side. The connecting head includes a sliding seat on which a connecting member is installed. The intermediate conversion member is wedge-fitted with the sliding seat and controls the reverse sliding of the other sliding seat under the action of one of the sliding seats.

[0006] In one possible implementation, the node is a rectangular structure, the movable seal is a rectangular structure and the movable seal includes a movable base provided with an inclined sealing surface and a horizontal sealing surface, and the ends of the adjacent nodes that are far away from the middle reference are fixedly provided with a sealing body 1, and the ends close to the middle reference are fixedly provided with a sealing body 2, the sealing body 2 is in contact and sealed with the horizontal sealing surface and the inclined sealing surface, and the sealing body 1 is tightly connected with the inclined sealing surface.

[0007] In one possible implementation, the connecting member includes a connecting rod provided with a wedge-shaped opening, a mounting groove is provided on the sliding seat, a locking member with a locking head is provided on the sliding seat, the locking head is slidably connected to the sliding seat and wedge-shapedly cooperates with the wedge-shaped opening, and the locking member is threadedly connected to the sliding seat and rotationally connected to the locking head.

[0008] In one possible implementation, the intermediate conversion member includes a longitudinal displacement body provided with a wedge body and a wedge groove, and the sliding seat includes a transverse displacement body provided with a contact body that is rotatably provided, wherein the contact body in one sliding seat cooperates with the wedge body, and the contact body in the other sliding seat cooperates with the wedge groove.

[0009] In one possible implementation, a one-way limit opening is provided on the connector in the connector head that cooperates with the movable seal, and a limit block is provided on the corresponding movable seal. The limit block cooperates with the one-way limit opening, so that the movable seal in the pressure unit is pressed and sealed when the pressure unit is tensioned.

[0010] In a possible implementation, the joint bodies at both ends of the telescopic joint are detachably fixedly connected together, and the joint bodies are firmly connected together in combination with the connection of the sealing mechanism.

[0011] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0012] According to an embodiment of the present invention, a smoke and air duct expansion joint with a reinforced sealing structure is provided. Several sections are connected in series to form the expansion joint, which has a strong compensation ability and can fully meet the needs of stable operation of the pipeline system and compensation of installation environment errors. At the same time, a dynamic sealing area with an adaptive compensation function is formed between each two adjacent sections through the sealing mechanism, and the two groups of sections constitute interacting pressure units through the connecting components. The tensioning of any pressure unit will compress the movable seal in the pressure unit, increase the sealing strength and generate a compressive force on the movable seal in the other pressure unit, and the force directions of the movable seals in the two pressure units are opposite, so that the movable seal can quickly respond to the tensioning of the expansion joint and increase the overall sealing strength, forming a dynamic sealing area with adaptively increased sealing strength as a whole, effectively improving the sealing effect of the expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention provides an overall structural diagram of an air and smoke duct expansion joint with a reinforced sealing structure.

[0014] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0015] Figure 3 The present invention provides a schematic structural diagram of an intermediate seat and a connecting piece of an air and smoke duct expansion joint with a reinforced sealing structure provided by an embodiment of the present invention.

[0016] Figure 4 The present invention provides a schematic structural diagram of an intermediate conversion member and a connector of an air and smoke duct expansion joint with a reinforced sealing structure provided by an embodiment of the present invention.

[0017] Figure 5 It is a structural schematic diagram of a connecting piece fixedly connected to a front-side section body of an air and smoke duct expansion joint with a reinforced sealing structure provided by an embodiment of the present invention.

[0018] Figure 6The present invention is a schematic structural diagram of a fixed seal and a movable seal of an air and smoke duct expansion joint with a reinforced sealing structure provided by an embodiment of the present invention.

[0019] Figure 7 The present invention is a structural schematic diagram of a connecting piece fixedly connected to a rear movable sealing piece of an air and smoke duct expansion joint with a reinforced sealing structure provided by an embodiment of the present invention.

[0020] In the figure: 1. node; 2. sealing mechanism; 21. fixed sealing member; 22. movable sealing member; 221. inclined close contact surface; 222. horizontal close contact surface; 223. movable base; 23. intermediate seat; 24. connecting head; 241. connecting member; 2411. wedge-shaped opening; 2412. connecting rod; 242. sliding seat; 2421. contact body; 2422. transverse displacement body; 243. mounting groove; 244. locking head; 245. locking member; 246. one-way limit opening; 247. limit block 247; 25. intermediate conversion member; 251. wedge-shaped body; 252. wedge-shaped groove; 253. longitudinal displacement body; 26. close contact body 1; 27. close contact body 2; 3. unified connecting frame; 4. fastener. DETAILED DESCRIPTION

[0021] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described below, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] See also Figure 1 A telescopic joint for an air and smoke duct with a reinforced sealing structure comprises a sealing mechanism 2 and a plurality of sections 1 connected in series and having a rectangular structure. The plurality of sections 1 connected in series form a telescopic joint. The telescopic joint has a strong compensation capability and can fully meet the requirements for stable operation of the pipeline system and compensation for installation environment errors. The middle section 1 of the plurality of sections 1 connected in series is the middle reference, and the remaining sections 1 are divided into two groups and are located on both sides of the middle reference, such as Figure 1 As shown, there are five nodes 1, the middle node 1 is the middle reference, and the other four are divided into two groups and are respectively located on the front and rear sides of the middle reference. The sealing mechanism 2 forms a sealing area with an adaptive compensation function between each adjacent node 1, which effectively improves the sealing performance of the telescopic joint and avoids leakage of the telescopic joint during the tensioning process. The sealing mechanism 2 has the advantages of fast response speed and strong adaptive compensation ability.

[0023] See Figure 1 、 Figure 3 and Figure 6The sealing mechanism 2 includes a sealing assembly and several connecting assemblies. The sealing assembly includes a fixed sealing member 21 located between the opposite ends of adjacent segments 1 and a movable sealing member 22 located between the opposite ends of adjacent segments 1. The fixed sealing member 21 and the movable sealing member 22 are both rectangular structures, and the fixed sealing member 21 is located between the opposite end faces of adjacent segments 1 and is fixedly installed on one of the end faces (such as Figure 6 As shown), the connecting assembly is connected between one group of segments 1 and the movable seal 22 in the other group of segments 1, and the two connecting assemblies form a transmission unit. The connecting assembly in the transmission unit is not connected to the same group of segments 1, as shown. Figure 1 As shown, the joint body 1 has four sides, namely, the upper, lower, left and right sides, and each side corresponds to two groups of transmission units. One group of connecting components in the transmission unit is fixedly connected to the two joint bodies 1 on the front side of the middle reference, and is connected to the movable seal 22 on the rear side of the middle reference. When part of the front joint body 1 is tensioned, on the one hand, the movable seal 22 on the front side is pressed to enhance its sealing strength, and on the other hand, pressure is applied to the movable seal 22 on the rear side to increase its sealing strength. Similarly, another group of connecting components in the transmission unit is fixedly connected to the two joint bodies 1 on the rear side of the middle reference, and is connected to the movable seal 22 located on the rear side of the middle reference. When part of the rear joint body 1 is tensioned, on the one hand, the movable seal 22 on the rear side is pressed to enhance its sealing strength. Sealing strength, on the other hand, pressure is applied to the movable seal 22 on the front side to increase its sealing strength. In summary, the two groups of nodes 1 on both sides of the middle reference constitute two interacting pressure units through the connecting components. During the tensioning of the telescopic joint, the tensioning of any pressure unit will compress the movable seal 22 in the pressure unit to increase the sealing strength and generate a compressive force on the movable seal 22 in the other pressure unit, thereby increasing the sealing strength of the corresponding movable seal 22. The force directions of the movable seals 22 in the two pressure units are opposite, so that the movable seal 22 can quickly respond to the tensioning of the telescopic joint and increase the overall sealing strength, forming a dynamic sealing area that adaptively increases the sealing strength as a whole, thereby effectively improving the sealing effect of the telescopic joint.

[0024] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5The connecting assembly includes an intermediate seat 23. A unified connecting frame 3 is installed on the four sides of the intermediate reference segment 1. The intermediate seats 23 on the corresponding sides are installed on the unified connecting frame 3. Two connecting heads 24 and an intermediate conversion piece 25 are provided on the intermediate seat 23. One connecting head 24 is used to connect the two segments 1 on the front or rear side, and the other connecting head 24 is used to connect the two movable seals 22 on the front or rear side. The connecting head 24 includes a sliding seat 242 detachably connected to a connecting piece 241. The sliding seat 242 is connected to the intermediate seat 23 for sliding back and forth. The intermediate conversion piece 25 is wedge-fitted with the sliding seat 242 and controls the other sliding seat 242 to slide in the opposite direction under the action of one of the sliding seats 242. There are two connecting pieces 241 and they are respectively connected to the corresponding segments 1 or movable seals 22. The connecting assembly fixedly connected to the front segment 1 in the pressure unit is used as an example for specific description. Figure 3 and Figure 6 As shown, the two connecting heads 24 in the connecting assembly are distributed front and back, and the two connecting pieces 241 in the front connecting head 24 are fixedly connected to the two front segment bodies 1 respectively, and at the same time, they are limited with the corresponding movable sealing pieces 22 on the front side. When the front segment body 1 is stretched, the connecting piece 241 fixedly connected to the segment body 1 moves forward accordingly. At this time, the movable sealing piece 22 on the middle front side moves forward accordingly. When the movable sealing piece 22 on the front side moves forward, it will not drive the corresponding connecting piece 241 to move forward. The two connecting pieces 241 in the rear connecting head 24 are fixedly connected to the two front segment bodies 1 respectively, and at the same time, they are limited with the corresponding movable sealing pieces 22 on the front side. 41 are fixedly connected to the two movable seals 22 on the rear side. When the front segment 1 is stretched, the corresponding sliding seat 242 is synchronously driven to move by the connecting piece 241 fixedly connected to the front segment 1, and the movable seal 22 on the front side moves forward and is pressed. The sliding seat 242 pushes the other sliding seat 242 back through the intermediate conversion piece 25 that cooperates with its wedge shape, and then applies a thrust to the two movable seals 22 on the rear side through the corresponding connecting piece 241, so that the movable seal 22 is pressed to increase the sealing strength.

[0025] See Figure 4 and Figure 6 , and the movable seal 22 is limited to cooperate with the connector 241 is provided with a one-way limit opening 246, the corresponding movable seal 22 is fixed with a limit block 247, the limit block 247 corresponds to the one-way limit opening 246 and cooperates with each other, such as Figure 6 As shown, the connecting member 241 moves forward, and the limiting block 247 is limited by the one-way limiting opening 246, thereby synchronously driving the movable sealing member 22 to move, so that the movable sealing member 22 in the pressure unit maintains a stable sealing state.

[0026] See Figure 3 、 Figure 4 、 Figure 5 and Figure 7The connecting member 241 includes a connecting rod 2412 provided with a wedge-shaped opening 2411, a mounting groove 243 is provided on the sliding seat 242, and a locking member 245 with a locking head 244 is provided on the sliding seat 242. The locking head 244 is slidably connected to the sliding seat 242 and wedge-fits with the wedge-shaped opening 2411. The locking member 245 is threadedly connected to the sliding seat 242 and is rotatably connected to the locking head 244. Figure 5 As shown, the mounting groove 243 is used to limit the connecting rod 2412 and the connecting rod 2412 can slide in the front and rear directions under the limitation of the mounting groove 243. During the installation process, the connecting rod 2412 is inserted into the corresponding mounting groove 243, and then the locking piece 245 is twisted to make the locking head 244 insert into the wedge-shaped opening 2411, and the connecting rod 2412 is limited by the cooperation of the locking head 244 and the wedge-shaped opening 2411. The connecting rod 2412 fixedly connected to the middle reference front side segment 1 can only move backward alone under the limitation of the corresponding locking head 244 and the wedge-shaped opening 2411. When the connecting rod 2412 moves forward, it will synchronously drive the corresponding sliding seat 242 to slide (as shown in FIG. Figure 7 As shown), the connecting rod 2412 fixedly connected to the movable seal 22 on the rear side of the intermediate reference can only move forward alone under the limitation of the corresponding locking head 244 and the wedge-shaped opening 2411. When the corresponding sliding seat 242 moves backward, the corresponding locking head 244 and the wedge-shaped opening 2411 will synchronously drive the connecting rod 2412 to move backward (as shown). Figure 6 As shown), and as the locking head 244 is fed, the locking distance of the connecting rod 2412 can be controlled, so that the locking state can be adjusted in time during use, so that the sealing mechanism 2 is in the best sealing state.

[0027] See Figure 1 、 Figure 3 and Figure 6 The movable sealing member 22 includes a movable base 223 provided with an inclined sealing surface 221 and a horizontal sealing surface 222. A rectangular sealing body 1 26 is fixedly provided at the end of the adjacent segments 1 that is away from the middle reference, and a second sealing body 27 is fixedly provided at the end close to the middle reference. The second sealing body 27 is in contact and sealed with the horizontal sealing surface 222 and the inclined sealing surface 221. The first sealing body 26 is in close contact with the inclined sealing surface 221. Figure 6 As shown, the movable seal 22 is in contact and sealed with the close-contact body 1 26 and the close-contact body 2 27 at the same time and in the tensioned state, the horizontal close-contact surface 222 and the inclined close-contact surface 221 cooperate with the corresponding close-contact body 1 26 and the close-contact body 2 27 to form a horizontal sealing area and an inclined sealing area, thereby effectively improving the sealing effect between adjacent nodes 1.

[0028] See Figure 3 and Figure 4The intermediate conversion member 25 includes a longitudinal displacement body 253 provided with a wedge-shaped body 251 and a wedge-shaped groove 252. The longitudinal displacement body 253 is slidably mounted on the intermediate seat 23. The sliding seat 242 includes a transverse displacement body 2422 rotatably provided with a contact body 2421. The corresponding connecting member 241 is mounted on the transverse displacement body 2422. The transverse displacement body 2422 is slidably mounted on the intermediate seat 23 forward and backward. The contact body 2421 in the sliding seat 242 on which the connecting member 241 is fixedly connected to the segment 1 cooperates with the wedge-shaped groove 252, as shown in FIG. Figure 4 As shown, the connecting member 241 moves through the cooperation between the contact body 2421 and the wedge-shaped groove 252 to move the longitudinal displacement body 253, and the contact body 2421 in the sliding seat 242 on which the connecting member 241 is fixedly connected to the movable sealing member 22 cooperates with the wedge-shaped body 251, and the longitudinal displacement body 253 moves through the cooperation between the wedge-shaped body 251 and the corresponding contact body 2421 to push the corresponding transverse displacement body 2422 in reverse.

[0029] See Figure 1 and Figure 3 During the installation process, the front and rear end segments 1 are fastened together by a number of fasteners 4, and the middle segments 1 can be connected to each other and fastened together with the front and rear end segments 1 by the sealing mechanism 2.

[0030] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections, integral or sliding connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air and smoke duct expansion joint with a reinforced sealing structure, characterized in that: include: Several segments connected in series to form a telescopic joint, one of which serves as the middle reference, and the remaining segments are divided into two groups and are located on both sides of the middle reference; Sealing mechanism, the sealing mechanism includes a sealing assembly and a plurality of connecting assemblies, the sealing assembly includes a fixed seal located between opposite ends of adjacent segments and a movable seal located between opposite ends of adjacent segments; The two groups of nodes on both sides of the middle reference form two interacting pressure units through a connecting assembly. When any pressure unit is stretched, the movable seal in the pressure unit will be compressed to increase the sealing strength and generate a compressive force on the movable seal in the other pressure unit. The connecting assembly is connected between the movable seal in one group of segments and the other group of segments, and the two connecting assemblies form a transmission unit, and the connecting assemblies in the transmission unit are not connected to the same group of segments; The connecting assembly includes an intermediate seat, on which a connector and an intermediate conversion member are provided. The connectors are located on both sides of the intermediate conversion member, wherein the connector on one side is connected to a group of nodes on the corresponding side and is also limitedly engaged with the movable seal on the corresponding side, and the connector on the other side is connected to the movable seal on the corresponding side; The connector comprises a sliding seat on which a connecting piece is installed. The intermediate conversion piece is wedge-matched with the sliding seat and controls the other sliding seat to slide in the opposite direction under the action of one of the sliding seats.

2. The expansion joint for an air and smoke duct with a reinforced sealing structure according to claim 1, characterized in that: The node is a rectangular structure, the movable seal is a rectangular structure and the movable seal includes a movable base provided with an inclined sealing surface and a horizontal sealing surface. The ends of the adjacent nodes that are far away from the middle reference are fixedly provided with a sealing body 1, and the ends close to the middle reference are fixedly provided with a sealing body 2. The sealing body 2 is in contact and sealed with the horizontal sealing surface and the inclined sealing surface, and the sealing body 1 is tightly connected with the inclined sealing surface.

3. The expansion joint for an air and smoke duct with a reinforced sealing structure according to claim 1, characterized in that: The connecting piece includes a connecting rod with a wedge-shaped opening, a mounting groove is provided on the sliding seat, a locking piece with a locking head is provided on the sliding seat, the locking head is slidably connected to the sliding seat and wedge-shapedly cooperates with the wedge-shaped opening, and the locking piece is threadedly connected to the sliding seat and rotatably connected to the locking head.

4. The expansion joint for an air and smoke duct with a reinforced sealing structure according to claim 1, characterized in that: The intermediate conversion member includes a longitudinal displacement body provided with a wedge body and a wedge groove, and the sliding seat includes a transverse displacement body provided with a contact body, wherein the contact body in one sliding seat cooperates with the wedge body and the contact body in the other sliding seat cooperates with the wedge groove.

5. The expansion joint for an air and smoke duct with a reinforced sealing structure according to claim 1, characterized in that: A one-way limiting opening is provided on the connecting piece in the connecting head that cooperates with the movable sealing piece, and a limiting block is provided on the corresponding movable sealing piece. The limiting block cooperates with the one-way limiting opening, so that the movable sealing piece in the pressure unit is pressed and sealed when the pressure unit is tensioned.

6. The expansion joint for an air and smoke duct with a reinforced sealing structure according to claim 1, characterized in that: The joint bodies at both ends of the telescopic joint are detachably fixedly connected together, and the joint bodies are firmly connected together in combination with the connection of the sealing mechanism.

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