Insertion plate type smoke isolation door

Abstract

The utility model discloses a flashboard type flue gas isolation door, which is characterized in that a driving mechanism for pulling and inserting a flashboard door is arranged on a shell of the flashboard door, and a movable door frame for moving along the inlet and outlet direction of a flue is arranged in a sealing door frame connected with the inlet end of the flue; a frame type baffle abutting against the sliding plate door pressed by the bottom end face of the movable door frame for sealing is arranged in a sealing door frame at the outlet end of the connecting flue. A plurality of rollers are rotatably matched on two outer sides of the movable door frame, respective rails which extend along the length direction and are used for rolling of the plurality of rollers on respective sides are fixed on the upper surface of the slide plate gate, transition slopes are arranged at two length ends of the rails, and rectangular through holes for linear movement of the two rails are formed in the long through holes; the peripheries of the sealing door frame and the movable door frame are provided with a plurality of springs which enable the movable door frame to automatically and downwards press the slide plate door for sealing. The sealing structure of the inserting plate type smoke isolation door is relatively simple, sealing is tight, and the equipment cost and the use cost are relatively saved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue equipment in thermal power plants, in particular to a plug-in type flue gas isolation door. Background Art

[0002] Due to the need for regular and irregular inspection and maintenance of equipment, smoke isolation doors are installed between the smoke duct and other equipment in thermal power plants. Isolation doors, also known as partition doors, isolation doors or thermal insulation gate doors, are roughly divided into two types: plug-in doors and flap doors. The cross-section of the smoke duct or air duct of the plug-in door is circular, that is, the plug-in door has a circular door frame, but is generally rectangular, that is, a rectangular door frame is used with a rectangular door.

[0003] With the advancement of environmental protection projects such as desulfurization and denitrification in thermal power plants, flue gas isolation in this system equipment has always been a difficult problem. This is because there are a large number of toxic gases and high-temperature gases in the flue gas. If it is not closed tightly, it will cause great hidden dangers to personal safety.

[0004] The existing plug-in type smoke isolation doors are of various types and structures, but there is still room for improvement. For example, some use multiple cylinders to drive cams and other mechanisms to lift or press down the sealing door frame to achieve sealing. The equipment cost is relatively high, and the sealing process requires additional electricity consumption. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a plug-in type smoke isolation door which has a relatively simple sealing structure, is tightly sealed and relatively saves equipment cost and use cost.

[0006] The technical solution of the utility model is to provide a plug-in type smoke isolation door, including a plug-in door shell and a plug-in door, the plug-in door shell is provided with a driving mechanism for pulling out and inserting the plug-in door, the plug-in door shell includes a sealing door frame and a accommodating door frame for accommodating the pulled-out plug-in door, the two end surfaces of the sealing door frame are used to connect and seal with the inlet end and the outlet end of the annular flue, the partition vertical plate between the sealing door frame and the accommodating door frame is provided with an elongated through hole for the linear movement of the plug-in door, and the sealing door frame connected to the inlet end of the flue has a for moving along the inlet and outlet direction of the flue. A movable door frame is provided, and a sealed door frame at the outlet end of the flue is provided with a frame baffle which is sealed against the plug-in door pressed by the bottom end surface of the movable door frame; a plurality of rollers are rotatably matched on the two outer sides of the movable door frame, and respective tracks extending along the length direction and for the rolling of the plurality of rollers on each side are fixed on the upper surface of the plug-in door, transition slopes are provided at both ends of the length of the track, and rectangular through holes are provided on the long through holes for the linear movement of the two tracks; a plurality of springs are provided around the sealed door frame and the movable door frame to automatically press the movable door frame downward to tighten the plug-in door for sealing.

[0007] After adopting the above structure, the utility model has the following advantages: the sealing structure of the utility model is relatively simple, and four springs at the four corners of a rectangular sealing door frame are used to replace multiple cylinder cam drive mechanisms, which saves equipment costs relatively, and the sealing process does not require additional power consumption, which saves relatively cost. The coordinated use of rollers and tracks effectively ensures the straightness, guidance and smoothness of the plug-in door during the withdrawal or insertion process. When the plug-in door is closed, a circle of multiple springs presses the bottom end of the movable door frame or the sealing compression sleeve or the sealing compression body onto the plug-in door, and the sealing is tight, stable and reliable.

[0008] Furthermore, the top angle of the inner wall of the plug-in door close to the sealing door frame and away from the accommodating door frame is a rounded angle or a chamfer. After adopting the above structure, the closing of the plug-in door is smoother and more reliable, and the technical effect of tight and reliable sealing is further guaranteed.

[0009] Furthermore, there is a circle of compression spring upper compression plate on the inner wall of the sealed door frame, a circle of compression spring lower compression plate on the outer wall of the vertical plate of the movable door frame, and the two ends of the plurality of compression springs arranged along the periphery are respectively limited on the compression spring upper compression plate and the compression spring lower compression plate. After the spring adopts the above compression spring, its sealing structure is relatively simple, the installation is relatively convenient, the equipment cost is relatively saved, the sealing process does not need to consume additional electricity, the use cost is relatively saved, and its sealing is tight, stable and reliable.

[0010] Furthermore, there is an arc groove on the top of the track for the roller above to sink after the plug door is fully closed, so as to drive the movable door frame with the fixed roller shaft to be pressed down by the spring so that the bottom end surface of the movable door frame and the top surface of the plug door are more tightly sealed. With the above structure, the straightness, guidance and smoothness of the plug door during the withdrawal or insertion process are further guaranteed, and the technical effect of tighter sealing is achieved.

[0011] Furthermore, a circle of top horizontal plates of the movable door frame also serves as a tension spring top plate, a circle of tension spring bottom plate is arranged on the inner wall of the sealed door frame, and the two ends of multiple tension springs arranged along the periphery are respectively fixed on the tension spring top plate and the tension spring bottom plate. After the spring adopts the above tension spring, its sealing structure is relatively simple, installation is relatively convenient, equipment cost is relatively saved, the sealing process does not need to consume additional electricity, and the use cost is relatively saved. Its sealing is tight, stable and reliable.

[0012] Furthermore, the bottom end of the movable door frame has a chamfer that makes the bottom end surface of the movable door frame and the top surface of the plug-in door form a line seal. After adopting the above structure, during the insertion of the plug-in door, since the bottom end surfaces of the movable door frame on both sides of the rectangular movable door frame are in line contact with the top surface of the rectangular plug-in door, the friction resistance is relatively small, especially when the plug-in door is inserted and closed, since the bottom ends of the rectangular movable door frame and the top surface of the plug-in door are all line sealed, the negative effects such as dust can be reduced, that is, the sealing effect is better, the sealing is tighter and more reliable.

[0013] Furthermore, a sealing elastic cover is provided on the top edge of the movable door frame and the sealing door frame to prevent dust from entering the cavity between the outer side of the movable door frame and the sealing door frame. After adopting the above structure, the top of the movable door frame is sealed by a sealing elastic cover such as a corrugated plate. It is not difficult to understand that when the bottom of the movable door frame is in the closed state of the plug-in door, due to the spring force of multiple springs, the bottom end face of the movable door frame is tightly sealed with the top face of the plug-in door, and when the plug-in door is pulled out, due to the spring force of multiple springs, the bottom end face of the movable door frame is tightly sealed with the frame baffle. Regardless of whether the plug-in door is closed or open, the multiple springs, rollers and tracks are always in a good working environment where dust is difficult to enter, which can further improve the working reliability, stability and service life of the springs and rollers.

[0014] Furthermore, the sealing door frame is divided into an upper sealing door frame and a lower sealing door frame, the boundary line between the upper sealing door frame and the lower sealing door frame is located at the height of the spring, and the upper sealing door frame and the lower sealing door frame are connected and fixed via an upper connecting flange, a lower connecting flange, a sealing gasket and a plurality of sets of bolts and nuts. With the above structure, it is more convenient to install, clean and maintain the spring and roller track structure.

[0015] Furthermore, a flexible sealing plate is fixed in the accommodating door frame to seal the elongated through holes, rectangular through holes and the top, bottom and side surfaces of the plug-in door of the partition vertical plate to prevent smoke leakage. With the above structure, when the plug-in door and the sealing door frame are closed and sealed, double insurance is provided, further ensuring the technical effect of the tight and reliable sealing of the plug-in type smoke isolation door, and when the plug-in door and the sealing door frame are opened, the elongated through holes on the partition vertical plate for the plug-in door to move linearly are also sealed to further prevent smoke from leaking from the elongated through holes and rectangular through holes when the sealing door frame is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front cross-sectional structural schematic diagram of a plug-in door in a closed state of an embodiment of the utility model of an isolation door using a compression spring (length drawing is omitted).

[0017] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of A.

[0018] Figure 3 It is a front cross-sectional structural schematic diagram of an embodiment of the utility model of an isolation door using a compression spring, in an open state of a plug-in door (length drawing omitted).

[0019] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of B.

[0020] Figure 5The utility model is a schematic side sectional structure diagram of an isolation door of the utility model in an open state of a plug-in door using a compression spring embodiment.

[0021] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of C in the figure.

[0022] Figure 7 It is a schematic diagram of the top cross-sectional structure of the plug-in door of the isolation door of the utility model in a closed state (the length drawing is omitted).

[0023] Figure 8 It is a front cross-sectional structural schematic diagram of a plug-in door in a closed state of an embodiment of the utility model of an isolation door using a tension spring (length drawing is omitted).

[0024] Fig. 9 It is a front cross-sectional structural schematic diagram of an embodiment of the utility model of an isolation door using a tension spring, in which a plug-in door is in an open state (the length drawing is omitted).

[0025] Fig.10 The utility model is a schematic side sectional structure diagram of an embodiment of an isolation door adopting a tension spring, in which a plug-in door is in an open state.

[0026] Fig.11 yes Fig.10 Schematic diagram of the enlarged structure of D in the figure.

[0027] As shown in the figure:

[0028] 1. Slot door housing, 11. Sealed door frame, 111. Upper end surface, 112. Lower end surface, 113. Frame baffle, 114. Compression spring upper compression plate, 1141. Upper spring seat, 115. Tension spring bottom pull plate, 1151. Lower pull ring, 116. Upper sealed door frame, 1161. Upper connecting flange, 117. Lower sealed door frame, 1171. Lower connecting flange, 118. Inner wall of the sealed door frame away from the accommodating door frame, 12. Accommodating door frame, 121. End plate away from the sealed door frame, 13. Partition vertical plate;

[0029] 2. Slot door, 21. Connecting block, 22. Top surface of slot door, 23. Bottom surface of slot door, 24. Top angle, 25. Track, 251. Transition slope, 252. Arc groove;

[0030] 3. driving cylinder, 31. driving rod, 311. U-shaped groove;

[0031] 4. Bolts with nuts;

[0032] 5. movable door frame, 51. roller, 511. roller shaft, 5111. limiting step, 5112. axial limiting nut, 52. compression spring lower pressing plate, 521. lower spring seat, 53. top horizontal plate, 531. upper pull ring;

[0033] 6. Spring, 61. Compression spring, 62. Tension spring, 621. Hook;

[0034] 7. Sealing elastic cover;

[0035] 8. Flexible sealing plate structure, 81. Flexible sealing plate, 82. Long pressing plate, 821. Long pressing plate with protruding flange plate, 83. Short pressing plate, 831. Short pressing plate with protruding flange plate. DETAILED DESCRIPTION

[0036] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these specific implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each specific implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 shown.

[0038] The utility model discloses a plug-in type smoke isolation door, comprising a plug-in door housing 1 and a plug-in door 2. The plug-in door housing 1 is provided with a driving mechanism for inserting and withdrawing the plug-in door 2, such as the driving cylinder 3 described below. The plug-in door housing 1 comprises a sealing door frame 11 and a receiving door frame 12 for receiving the withdrawn plug-in door 2. The two end surfaces of the sealing door frame 11 are used to connect with and seal the inlet end and the outlet end of the annular flue. A long through hole is provided on a partition vertical plate 13 between the sealing door frame 11 and the receiving door frame 12 for the plug-in door 2 to move linearly.

[0039] The above content can be expanded: the annular flue is like a rectangular flue. The sealing door frame 11 is a rectangular sealing door frame 11 as shown in the figure, and the accommodating door frame 12 for accommodating the pulled-out plug-in door is a rectangular accommodating door frame 12 as shown in the figure. The rectangular sealing door frame 11 and the rectangular accommodating door frame 12 constitute an integral plug-in door shell 1 connected by a partition vertical plate 13, and the plug-in door 2 is a rectangular plug-in door 2 as shown in the figure. The partition vertical plate 13 can be understood as an end plate of the sealing door frame 11 close to the accommodating door frame 12, and can also be understood as an end plate of the accommodating door frame 12 close to the sealing door frame 11. The height dimension of the accommodating door frame 12 can be smaller than the height dimension of the sealing door frame 11, and there are gaps at the top and bottom. The upper end face 111 and the lower end face 112 of the rectangular sealed door frame 11 are respectively connected and sealed with the inlet end and the outlet end of the rectangular flue. For example, the inlet end of the rectangular flue is connected and sealed with the inlet end of the sealed door frame 11 such as the upper end face 111, and the outlet end of the rectangular flue is connected and sealed with the outlet end of the sealed door frame 11 such as the lower end face 112. For example, the respective flanges can be locked by a number of bolts and nuts. The contact surface between the upper flange and the flange at the inlet end of the flue can be sealed with a packing or other sealing material, and the contact surface between the lower flange and the flange at the outlet end of the flue can also be sealed with a packing or other sealing material. The sealed door frame 11 can also be called a valve door frame. The partition vertical plate 13 between the sealed door frame 11 and the accommodating door frame 12 has an elongated through hole for the linear movement of the plug-in door 2. It is not difficult to understand that there is a leak-proof sealing structure such as a heat-resistant rubber ring between the elongated through hole and the partition door 2 in the prior art. The plug-in door housing 1 is provided with a driving mechanism for pulling out and inserting the plug-in door 2, and the following specific structure can be adopted: a driving cylinder 3 is fixed on the outer wall of the end plate 121 of the accommodating door frame 12 away from the sealed door frame, such as by screwing with multiple screws, and a driving rod 31 of the driving cylinder 3 passes through the end plate 121 away from the sealed door frame, and the free end of the driving rod 31 of the driving cylinder 3 is hinged to one end of the plug-in door 2 extending into the accommodating door frame 12. The plug-in door 2 is also called a plug-in door. The driving cylinder 3 is also called a plug-in door driving cylinder. The driving cylinder 3 can be a hydraulic cylinder such as an oil cylinder, or a gas cylinder, or an electric push rod, or a hydraulic electric push rod; the driving rod 31 can be a push rod of a hydraulic cylinder such as an oil cylinder, or a push rod of a gas cylinder, or a push rod of an electric push rod, or a push rod of a hydraulic electric push rod.

[0040] The specific structure in which the free end of the driving rod 31 of the driving cylinder 3 is hinged to one end of the plug door 2 extending into the accommodating door frame 12 can be that a U-shaped groove 311 is provided on the free end of the driving rod 31, and the U-shaped groove 311 is inserted into a connecting block 21 of the plug door, such as a triangular connecting block 21, and coaxial through holes are provided on both walls of the U-shaped groove 311 on the free end of the driving rod 31 and on the connecting block 21 at this end of the plug door 2, and a bolt 4 with a nut or a cotter pin is rotatably fitted in the through hole.

[0041] It is not difficult to understand that the plug-in type smoke isolation door of the utility model can also be provided with a main controller or a central processing unit such as a CPU, and a position sensor such as a proximity switch can be provided on the inner wall of the sealing door frame 11 away from the accommodating door frame 12, that is, on the inner wall of the end plate away from the accommodating door frame 12, and the main controller is electrically connected to the position sensor and the relay that controls the drive cylinder.

[0042] The sealing door frame 11 connected to the inlet end of the flue has a movable door frame 5 for moving along the inlet and outlet direction of the flue, and the sealing door frame 11 connected to the outlet end of the flue has a frame baffle 113 that abuts against the plug-in door 2 pressed by the bottom end surface of the movable door frame 5 to seal. The movable door frame 5 is also called a sealing compression body or a sealing compression sleeve. The above is the prior art.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 shown.

[0044] The utility model discloses a plug-in type smoke isolation door, wherein a plurality of rollers 51 are rotatably matched on the two outer sides of the movable door frame 5: respective roller shafts 511 are fixed on the outer side walls of the vertical plates of the movable door frame 5 as if welded, and there are limit steps 5111 on the roller shafts 511, and the rollers 51 are rotatably matched on the roller shafts 511, and an axial limit nut 5112 is screwed on the external thread at the outer end of the roller shafts 511. Figure 7The track 25 extends in the left and right directions and is provided for the rolling of multiple rollers 51 on each side, such as a long strip track 25 with a flat rectangular cross section, and transition slopes 251 are provided at both ends of the length of the track 25. The top of the track 25 is provided with an arc groove 252 for the upper roller 51 to sink after the plug-in door 2 is closed to drive the movable door frame 5 with the fixed roller shaft 511 to be pressed down by the spring 6 so that the bottom end surface of the movable door frame 5 and the top surface 22 of the plug-in door are more tightly sealed. There is a rectangular through hole on the long through hole for the two tracks 25 to move linearly. It is not difficult to understand that the rectangular through hole is above the long through hole, and the rectangular through hole is connected to the long through hole. There are multiple springs 6 on the sealing door frame 11 and the movable door frame 5 to automatically press the movable door frame 5 downward to seal the plug-in door 2. It is not difficult to understand that the sealing here refers to the sealing of the bottom end surface of the movable door frame 5 and the top surface 22 of the plug-in door. Of course, the sealed door frame 11 at the outlet end of the connecting flue has a frame baffle 113 in it, which is pressed against the plug-in door 2 pressed by the bottom end face of the movable door frame 5 to seal it, and it plays a role here; at this time, the frame baffle 113 is pressed against the bottom face 23 of the plug-in door, limiting the height position of the plug-in door 2, that is, at this time, the plug-in door 2 will not move downward, so that the bottom end face of the movable door frame 5 and the top face 22 of the plug-in door are tightly sealed. Figure 7 It can be understood that the front and rear of the movable door frame 5 are sides. Figure 7 The upper part in the middle is the back side. Figure 7 The lower part in the middle is the front side, Figure 7 The left end is away from the door frame 12. Figure 7 The right side of the circle is the end close to the door frame 12. A circle is also called a periphery, and for a rectangle, it is also called a periphery. Figure 7 Of the four corners of the rectangular sealed door frame 11 shown, of course, one or more springs 6 can be added between the two springs 6 on the rear side, and the distances between each two springs 6 can be equal. One or more springs 6 can also be added between the two springs 6 on the rear side, and the distances between each two springs 6 can also be equal, and the multiple springs 6 on the front and rear sides can be arranged symmetrically. The transition slope 251 is also called a chamfer.

[0045] like Figure 1 , Figure 8 As shown, the inner wall 118 of the plug-in door 2 close to the sealing door frame and away from the accommodating door frame is Figure 1 and Figure 8 The top angle of the inner wall of the leftmost inner wall, also called the inner wall of the leftmost end plate, is a rounded angle or a chamfer.

[0046] like Figure 1-Figure 6 As shown:

[0047] A specific embodiment of the spring 6 can adopt a compression spring 61. The compression spring 61 is also called a compression spring, or a support spring. A circle of an upper compression plate 114 of the compression spring is arranged on the inner wall of the sealed door frame 11, and a circle of a lower compression plate 52 of the compression spring is arranged on the outer wall of the vertical plate of the movable door frame 5. The two ends of a plurality of compression springs 61 arranged along the periphery, such as four, are respectively limited on the upper compression plate 114 of the compression spring and the lower compression plate 52 of the compression spring. The specific structure can be: a spring seat with a circular axial protrusion, such as an upper spring seat 1141 and a lower spring seat 521, is fixed, such as welded, on the upper compression plate 114 of the compression spring and the lower compression plate 52 of the compression spring, the upper end of the circular compression spring 61 is sleeved in the upper spring seat 1141, and the lower end of the circular compression spring 61 is sleeved in the lower spring seat 521.

[0048] Of course, the upper clamping plate 114 and the lower clamping plate may not be arranged in a circle. For example, when there are only a few compression springs 61, a separate small-area compression spring upper clamping plate 114 and a compression spring lower clamping plate 52 may be arranged where the compression springs 61 are installed.

[0049] like Figure 7-Figure 11 As shown:

[0050] Another specific embodiment of the spring 6 can use a tension spring 62. A circle of top horizontal plate 53 of the movable door frame 5 also serves as a tension spring top pull plate, and a circle of tension spring bottom pull plate 115 is provided on the inner wall of the sealed door frame 11. The two ends of a plurality of, for example, four tension springs 62 arranged along the periphery are respectively fixed on the top horizontal plate 53, i.e., the tension spring top pull plate and the tension spring bottom pull plate 115. Specifically, the tension spring top pull plate and the tension spring bottom pull plate 115 can be fixed with, for example, welded pull rings, such as an upper pull ring 531 and a lower pull ring 1151, and the hooks 621 at both ends of the tension spring 62 are respectively hung on the upper pull ring 531 and the lower pull ring 1151. The hooks 621 at both ends can also be regarded as upper hooks and lower hooks here.

[0051] Of course, the tension spring bottom plate 115 may not be provided with a circle. For example, when there are only a few tension springs 62, a separate tension spring bottom plate 115 with a small area may be provided where the tension springs 62 are installed.

[0052] The bottom end of the movable door frame 5 has a chamfer that makes the bottom end face of the movable door frame 5 and the top face 22 of the plug-in door form a line seal. It is not difficult to understand that the movable door frame 5 is rigid and is generally made of carbon steel. For wear resistance and tight sealing, wear-resistant materials such as tool steel can be inlaid on the bottom end face of the movable door frame 5.

[0053] On the top edge of the movable door frame 5, such as the outer edge of the top cross plate 53 and the inner wall of the sealed door frame 11, there is a sealing elastic cover 7 for preventing dust from entering the cavity between the outer side of the movable door frame 5 and the sealed door frame 11. The sealing elastic cover 7 is also called a sealing elastic body or a sealing elastic plate, and can be made of a corrugated plate or a rubber plate, and can be fixed to the inner wall of the sealed door frame 11 and the edge of the top cross plate 53 of the movable door frame 5 by means of a pressure strip and screws. It is not difficult to understand that the top of the movable door frame 5 is sealed by the sealing elastic cover 7, and the bottom of the movable door frame 5 is tightly sealed with the top surface 22 of the plug-in door 2 due to the spring force of the multiple springs 6 when the plug-in door 2 is closed, and the bottom of the movable door frame 5 is tightly sealed with the frame baffle 113 due to the spring force of the multiple springs 6 when the plug-in door 2 is pulled out. Regardless of whether the plug-in door 2 is closed or opened, the multiple springs 6, the rollers 51 and the track 25 are always in a good working environment where dust is difficult to enter.

[0054] The sealing door frame 11 can be divided into an upper sealing door frame 116 and a lower sealing door frame 117. The dividing line between the upper sealing door frame 116 and the lower sealing door frame 117 is located at the height of the spring 6. The upper sealing door frame 116 and the lower sealing door frame 117 are connected and fixed via an upper connecting flange 1161, a lower connecting flange 1171, a sealing gasket and multiple sets of bolts and nuts 4.

[0055] The plug-in type smoke isolation door also includes a flexible sealing plate structure 8: a flexible sealing plate 81 or a flexible sealing ring plate is fixed in the accommodating door frame 12 with elongated through holes, rectangular through holes and the top surface 22 of the plug-in door, the bottom surface 23 of the plug-in door and the two side surfaces of the plug-in door 2, namely the front side surface and the rear side surface, to prevent smoke leakage. The flexible sealing plate 81 can be a sealing ring plate made of polytetrafluoroethylene material with self-lubricating properties that are heat-resistant and reduce friction. The top surface 22 of the plug-in door, the bottom surface 23 of the plug-in door, and the flexible sealing plate 81 on the front side and rear side of the plug-in door can all adopt the following fixing structure: the outer surface of the flexible sealing plate 81, i.e. the upper surface, the lower surface, the front side surface and the rear side surface, can all have a long pressing plate 82, one end of the long pressing plate 82 can be fixed to the side or the inner wall of the accommodating door frame 12 of the partition vertical plate 13, such as welding, and the end of the flexible sealing plate 81 away from the sealing door frame 11 has a short pressing plate 83, the short pressing plate 83 limits the horizontal position of the flexible sealing plate 81, and the protruding flange plate 831 of the short pressing plate is screwed and fixed to the protruding flange plate 821 of the long pressing plate through multiple or several bolts 4 with nuts.

[0056] It is easy to understand that, except for the flexible sealing plate 81 and the rubber ring, the other parts of the plug-in type smoke isolation door are all made of steel.

[0057] The above unmarked parts, structures or quantities are not shown in the drawings. The drawings are for illustration only. If there is any inconsistency between the drawings and the text description or between the drawings, the text description shall prevail.

[0058] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A plug-in type smoke isolation door, comprising a plug-in door housing and a plug-in door, the plug-in door housing is provided with a driving mechanism for inserting and withdrawing the plug-in door, the plug-in door housing comprises a sealing door frame and a accommodating door frame for accommodating the pulled-out plug-in door, the two end faces of the sealing door frame are used to connect and seal with the inlet end and the outlet end of the annular flue, the partition vertical plate between the sealing door frame and the accommodating door frame is provided with an elongated through hole for linear movement of the plug-in door, the sealing door frame connected to the inlet end of the flue is provided with a movable door frame for moving along the inlet and outlet direction of the flue, the sealing door frame connected to the outlet end of the flue is provided with a frame baffle for sealing against the plug-in door pressed by the bottom end face of the movable door frame; the characteristics are: There are multiple rollers rotating on the two outer sides of the movable door frame, and the upper surface of the plug-in door is fixed with respective tracks extending along the length direction for the multiple rollers on each side to roll. There are transition slopes at both ends of the length of the track, and there are rectangular through holes on the long through holes for the two tracks to move linearly; there are multiple springs around the sealed door frame and the movable door frame to automatically press the movable door frame downward to seal the plug-in door.

2. The plug-in type smoke isolation door according to claim 1, characterized in that: The top angle of the inner wall of the plug-in door close to the sealing door frame and away from the accommodating door frame is a rounded angle or a chamfered angle.

3. The plug-in type smoke isolation door according to claim 1, characterized in that: The inner wall of the sealed door frame is provided with a circle of upper compression plate of compression springs, the outer wall of the vertical plate of the movable door frame is provided with a circle of lower compression plate of compression springs, and the two ends of the plurality of compression springs arranged along the periphery are respectively limited on the upper compression plate of compression springs and the lower compression plate of compression springs.

4. The plug-in type smoke isolation door according to claim 1, characterized in that: A circle of top horizontal plate of the movable door frame also serves as a tension spring top pull plate, a circle of tension spring bottom pull plate is arranged on the inner wall of the sealed door frame, and two ends of multiple tension springs arranged along the periphery are respectively fixed on the tension spring top pull plate and the tension spring bottom pull plate.

5. The plug-in type smoke isolation door according to claim 1, characterized in that: The bottom end of the movable door frame is provided with a chamfer which makes the bottom end surface of the movable door frame and the top surface of the plug-in door form a line seal.

6. The plug-in type smoke isolation door according to claim 1, characterized in that: The top of the track is provided with an arc groove for the roller above to sink after the plug door is closed to drive the movable door frame with the fixed roller shaft to be pressed down by the spring so that the bottom end surface of the movable door frame and the top surface of the plug door are more tightly sealed.

7. The plug-in type smoke isolation door according to claim 1, characterized in that: A sealing elastic cover is arranged on the top edge of the movable door frame and the sealing door frame, which is used to prevent dust from entering the cavity between the outer side of the movable door frame and the sealing door frame.

8. The plug-in type smoke isolation door according to claim 1, characterized in that: The sealing door frame is divided into an upper sealing door frame and a lower sealing door frame. The dividing line between the upper sealing door frame and the lower sealing door frame is located at the spring height. The upper sealing door frame and the lower sealing door frame are connected and fixed via an upper connecting flange, a lower connecting flange, a sealing gasket and multiple sets of bolts and nuts.

9. The plug-in type smoke isolation door according to claim 1, characterized in that: A flexible sealing plate is fixed in the accommodating door frame for sealing the elongated through holes, rectangular through holes and the top surface, bottom surface and side surface of the plug-in door of the partition vertical plate to prevent smoke leakage.

Images