Automatic door opening device for underground pipe gallery escape vertical ladder

Abstract

The utility model discloses an automatic door opening device for an escape vertical ladder of an underground pipe gallery, the escape vertical ladder extends upwards from the underground pipe gallery to the ground, a fireproof door is arranged at the position, corresponding to the escape vertical ladder, of a fireproof wall on the ground, and locking of the fireproof door is achieved through matching of a lock catch installed on a door frame and a fixing pin installed on the fireproof door. A triggering mechanism, a fixed pulley and a pull rope are arranged on the escape straight ladder, the triggering mechanism comprises a triggering cross rod arranged on the lower section of the escape straight ladder in a crossing mode, the left end and the right end of the cross rod are installed on the escape straight ladder through two connecting blocks respectively, penetrating holes are formed in the two connecting blocks respectively, and the cross rod can vertically move in the range of the penetrating holes; the fixed pulley is installed on the portion, above the ground, of the escape vertical ladder, the bottom end of the pull rope is fixed to the transverse rod, and the upper end of the pull rope upwards bypasses the fixed pulley, then extends obliquely downwards and is connected with a handle of the lock catch. The fireproof door has the advantage that the fireproof door can be automatically opened in the escape process of escape personnel.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency escape devices, in particular to an automatic door opening device for an underground pipe gallery escape elevator. Background Art

[0002] Underground pipe corridors, important transportation channels for gas, electricity, heat, fire protection, and communications in cities or enterprises, are often very long and can reach depths of five or six meters, or even more than ten meters or even dozens of meters. This poses significant safety risks. In the event of a fire or other abnormal situation, personnel must escape the underground pipe corridor immediately. In addition to building stairs, underground pipe corridors are also designed with escape ladders that lead directly to the ground. When escaping through the escape ladder, after reaching the top of the escape ladder from the bottom, the escaper needs to manually open the escape fire door. This operation involves holding the escape ladder with one hand and pushing open the fire door with the other. This can easily cause the escaper to fall from the escape ladder, posing a significant safety risk and prolonging the escape time. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an automatic door opening device for an underground tunnel escape elevator, so that the fire doors on the ground can be automatically opened during the escape process, thereby ensuring the personal safety of the escapees.

[0004] The utility model is realized through the following technical solutions:

[0005] The fire door is mounted on the fire wall at a position corresponding to the fire door, and the fire door is locked by a lock catch installed on the door frame and cooperates with a fixing pin installed on the fire door to realize locking of the fire door. The lock catch is provided with a handle that can be opened and closed. The fire door is provided with a trigger mechanism, a fixed pulley and a pull rope. The trigger mechanism includes a trigger cross bar arranged across the lower section of the escape ladder, and the left and right ends of the cross bar are respectively mounted on the escape ladder through two connecting blocks. The two connecting blocks are respectively provided with a through hole for the cross bar to pass through, and the through holes are waist-shaped holes extending vertically. The cross bar can move vertically within the range of the through holes. The fixed pulley is installed at the position of the escape ladder above the ground, the bottom end of the pull rope is fixed on the cross bar, and the upper end of the pull rope extends obliquely downward after passing around the fixed pulley and is connected to the handle of the lock catch.

[0006] As a preferred embodiment of the above-mentioned device, the lock includes a lock frame and a lock tongue. The lock frame is installed on the door frame, the middle section of the lock tongue is hinged on the lock frame, the lower end of the lock tongue is connected to the bottom of the lock frame through an inclined tension spring, the handle is set at the upper end of the lock tongue, the upper end of the pull rope is connected to the junction of the handle and the lock tongue, the front end of the lock frame is provided with a locking groove for the horizontal embedding of the fixing pin, and the front end of the lock tongue is provided with a locking protrusion. When the fire door is closed, under the elastic tension of the tension spring, the locking protrusion of the lock tongue is located at the front opening of the locking groove of the lock frame, locking the fixing pin in the locking groove, and at the same time applying tension to the pull rope to lift the cross bar upward.

[0007] As a preferred solution of the above-mentioned device, one end of the cross rod extends out of the through hole of one of the connecting blocks and is provided with a limit plate, and the other end of the cross rod extends out of the through hole of the other connecting block and is detachably mounted with a limit block, and the limit plate and the limit block are respectively located on the outside of the two connecting blocks.

[0008] As a preferred solution of the above device, the pull rope and the fixed pulley are located on the same side of the escape ladder.

[0009] As a preferred solution of the above device, the pull rope is a steel wire rope.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] The utility model provides an automatic door opening device for an escape ladder in an underground tunnel, wherein a trigger cross bar is arranged at the lower section of the escape ladder, the trigger cross bar is connected to the handle of a lock by a pull rope, and the direction of the force is changed by a fixed pulley. When a person steps on the trigger cross bar during escape, the trigger cross bar is driven downward by the body's own weight, thereby pulling the pull rope downward, and the pull rope will drive the handle of the lock to flip and lift, thereby opening the lock. The fixing pin on the fire door is unlocked, and the door can be automatically opened under the elastic force of the spring hinge. There is no need for the person to manually open the fire door after reaching the ground, thereby ensuring the life safety of the escaping person and shortening the escape time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of the present utility model.

[0013] Figure 2 yes Figure 1 Enlarged view of point A.

[0014] Figure 3 It is a three-dimensional diagram of the fire door of the present invention in a closed state.

[0015] Figure 4 It is a three-dimensional diagram of the fire door of the present invention in an open state.

[0016] Figure 5 It is a three-dimensional diagram of the trigger mechanism of the present utility model.

[0017] Figure 6 It is a three-dimensional diagram of the lock buckle of the present invention.

[0018] Figure 7 It is a plan view of the lock buckle of the present utility model.

[0019] Figure 8 It is a three-dimensional diagram of the fixing pin of the present utility model.

[0020] Numbers in the figure: 1 escape ladder; 2 ground; 3 fire wall; 4 fire door; 5 spring hinge; 6 door frame; 7 lock; 8 fixing pin; 9 handle; 10 trigger mechanism; 11 fixed pulley; 12 pull rope; 13 trigger cross bar; 14 connecting block; 15 through hole; 16 limit plate; 17 limit block; 18 lock frame; 19 lock tongue; 20 pin shaft; 21 tension spring; 22 locking groove; 23 locking protrusion. DETAILED DESCRIPTION

[0021] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0022] See also Figures 1 to 8This embodiment discloses an automatic door opening device for an escape elevator in an underground pipe gallery. The escape elevator 1 extends upward from the underground pipe gallery to above the ground 2. A fire wall 3 is provided on the ground 2. A fire door 4 is provided on the fire wall 3 at a position corresponding to the escape elevator 1. The fire door 4 is mounted on a door frame 6 of the fire wall 3 through a spring hinge 5, and the fire door 4 is locked by a lock 7 installed on the door frame 6 and a fixing pin 8 installed on the fire door 4. The lock 7 is provided with a handle 9 that can be opened and closed. The escape ladder 1 is provided with a trigger mechanism 10, a fixed pulley 11 and a pull rope 12. The trigger mechanism 10 includes a trigger crossbar 13 arranged across the lower section of the escape ladder 1. The left and right ends of the crossbar are respectively mounted on the escape ladder 1 through two connecting blocks 14. The two connecting blocks 14 are respectively fixedly mounted on the left and right sides of the escape ladder 1. The two connecting blocks 14 are respectively provided with a through hole 15 for the crossbar to pass through. The through hole 15 is a waist-shaped hole extending vertically. The crossbar can move vertically within the range of the through hole 15. One end of the crossbar extends out of its A limit plate 16 is provided outside the through-hole 15 of one connecting block 14. The other end of the crossbar extends outside the through-hole 15 of the other connecting block 14 and is removably fitted with a limit block 17. The limit plate 16 and limit block 17 are respectively located outside the two connecting blocks 14. The limit plate 16 and the crossbar are integrally formed. The limit block 17 can be composed of two separate blocks that are aligned and locked together with bolts and nuts. The use of this split structure of the limit block 17 facilitates the installation of the crossbar on the two connecting blocks 14. The fixed pulley 11 is installed in the area of the escape ladder 1 above the ground 2. The bottom end of the pull rope 12 is fixed to the crossbar. The upper end of the pull rope 12 passes upward around the fixed pulley 11, then extends diagonally downward and connects to the handle 9 of the lock buckle 7. The pull rope 12 is a steel wire rope. The pull rope 12 and the fixed pulley 11 are located on the same side of the escape ladder 1.

[0023] The lock 7 includes a lock frame 18 and a lock tongue 19. The lock frame 18 is installed on the door frame 6. The middle section of the lock tongue 19 is hinged to the lock frame 18 through a pin 20. The lower end of the lock tongue 19 is connected to the bottom of the lock frame 18 through an inclined tension spring 21. The handle 9 is set at the upper end of the lock tongue 19, and the upper end of the pull rope 12 is connected to the junction of the handle 9 and the lock tongue 19. The front end of the lock frame 18 is provided with a locking groove 22 for the horizontal embedding of the fixing pin 8, and the front end of the lock tongue 19 is provided with a locking protrusion 23. When the fire door 4 is closed, under the elastic tension of the tension spring 21, the locking protrusion 23 of the lock tongue 19 is located at the front opening of the locking groove 22 of the lock frame 18, locking the fixing pin 8 in the locking groove 22, and at the same time applying tension to the pull rope 12 to lift the cross bar upward.

[0024] Under normal conditions, the fire door 4 is closed, and the fixing pin 8 on the fire door 4 is locked by the lock tongue 19 in the locking groove 22 of the lock catch 7. When an abnormal situation occurs and personnel need to escape via the escape ladder 1, they climb up the escape ladder 1. During this process, they step on the trigger crossbar 13, which is driven downward by their own weight, thereby pulling the pull rope 12 downward. The pull rope is then turned through the fixed pulley 11, and the pull rope 12 drives the handle 9 of the lock catch 7 to flip and lift, thereby lifting the locking protrusion 23 of the lock tongue 19 away from the front side of the locking groove 22 of the lock catch frame 18. The fixing pin 8 on the fire door 4 is unlocked, and the fire door 4 can be automatically opened by the elastic force of the spring hinge 5, without the need for the personnel to manually open the fire door 4 after reaching the ground 2.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic door opening device for an escape ladder in an underground pipe gallery. The escape ladder extends upward from the underground pipe gallery to above ground level. A fire wall is provided on the ground level. A fire door is provided on the fire wall at a location corresponding to the escape ladder. The fire door is mounted on the door frame of the fire wall via a spring hinge and is locked by a lock catch mounted on the door frame cooperating with a fixing pin mounted on the fire door. The lock catch is provided with a handle that can be opened and closed. The device is characterized in that: The escape ladder is provided with a trigger mechanism, a fixed pulley and a pull rope. The trigger mechanism includes a trigger crossbar arranged across the lower section of the escape ladder. The left and right ends of the crossbar are respectively installed on the escape ladder through two connecting blocks. The two connecting blocks are respectively provided with through holes for the crossbar to pass through. The through holes are vertically extending waist-shaped holes. The crossbar can move vertically within the range of the through holes. The fixed pulley is installed at the position of the escape ladder above the ground. The bottom end of the pull rope is fixed on the crossbar. The upper end of the pull rope passes upward around the fixed pulley and then extends obliquely downward and is connected to the handle of the lock.

2. The automatic door opening device for an underground tunnel escape elevator according to claim 1, characterized in that: The lock includes a lock frame and a lock tongue. The lock frame is installed on the door frame. The middle section of the lock tongue is hinged on the lock frame. The lower end of the lock tongue is connected to the bottom of the lock frame through an inclined tension spring. The handle is set at the upper end of the lock tongue. The upper end of the pull rope is connected to the intersection of the handle and the lock tongue. The front end of the lock frame is provided with a locking groove for the horizontal embedding of the fixing pin. The front end of the lock tongue is provided with a locking protrusion. When the fire door is closed, under the elastic tension of the tension spring, the locking protrusion of the lock tongue is located at the front opening of the locking groove of the lock frame, locking the fixing pin in the locking groove, and at the same time applying tension to the pull rope to lift the cross bar upward.

3. The automatic door opening device for an underground tunnel escape elevator according to claim 1, characterized in that: One end of the cross bar extends out of the through hole of one of the connecting blocks and is provided with a limit plate, and the other end of the cross bar extends out of the through hole of the other connecting block and is detachably fitted with a limit block, and the limit plate and the limit block are respectively located outside the two connecting blocks.

4. The automatic door opening device for an underground tunnel escape elevator according to claim 1, characterized in that: The pull rope and the fixed pulley are located on the same side of the escape ladder.

5. The automatic door opening device for an underground tunnel escape elevator according to claim 1, characterized in that: The pull rope is a steel wire rope.

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