Handle type ratchet wheel locking device of tunnel protective door

Abstract

The utility model relates to a tunnel protective door handle type ratchet wheel locking device which comprises a box body, the box body is fixedly installed on a protective door, a driving assembly is arranged on the box body and comprises a gear and a driving rack, the gear is rotationally installed on the box body, a rotating piece is arranged on the box body, and the driving rack is installed on the box body in a sliding mode. A latch is arranged on the driving rack, a locking mechanism is arranged on the inner side of the box body and comprises a ratchet wheel and a pawl, the ratchet wheel is connected with the gear, the pawl is arranged in the box body, and a driving piece is arranged on the outer side of the box body; the rotating piece drives the gear to rotate and drives the driving racks on the two sides to move in the opposite directions, the driving racks drive the plug pin to be inserted into the door frame, the ratchet wheel stops rotating, the pawl abuts against the ratchet wheel, the plug pin and the door frame are fixed, and the protective door is locked. The safety of workers is ensured; and unauthorized access is prevented.

Description

Technical Field

[0001] The present application relates to the field of tunnel protection doors, and in particular to a handle-type ratchet locking device for tunnel protection doors. Background Art

[0002] Tunnel safety protection door is a special purpose door set up to block the safety needs of the air pressure shock wave source, so that the internal equipment is intact and not harmed by the air pressure shock wave. The tunnel protection door system has excellent explosion-proof performance and anti-explosion performance of both fireproof performance. It is generally used in railway tunnels, such as cross passages, repeater stations, substations and other caverns.

[0003] Tunnel protection doors are usually composed of door frames, door leaves, locking devices and control systems. The locking device is an indispensable component, and usually a clutch locking device and an electromechanical locking device are used. The clutch locking device has a complicated installation process, many small parts, and is inconvenient for subsequent maintenance. In the humid environment of the tunnel, the parts will rust and fail over time; the electromechanical locking device has many electrical components, the tunnel environment is poor, and power failure and aging of electrical equipment may occur over a long period of time. It is inconvenient to use in an emergency and cannot quickly and reliably lock the protection door. Utility Model Content

[0004] In order to solve the problem that the existing locking device cannot quickly and reliably lock the protective door, the present application provides a handle-type ratchet locking device for the tunnel protective door.

[0005] The present application provides a ratchet locking device for a tunnel protection door with a handle, which adopts the following technical solution:

[0006] A handle-type ratchet locking device for a tunnel protection door comprises a box body, the box body is fixedly mounted on the protection door, the box body is provided with a driving assembly, the driving assembly comprises a gear and a driving rack, the gear is rotatably mounted on the box body, and the box body is provided with a rotating member that drives the gear to rotate, the driving rack is slidably mounted on the box body and is located at opposite sides of the gear, the driving rack is meshed with the gear, and connecting rods are provided on the driving racks on both sides, the connecting rods are respectively located at both sides of the box body, a latch is provided at one end of the connecting rod, and a locking mechanism is provided inside the box body, the locking mechanism comprises a ratchet and a pawl, the ratchet is connected to the gear and is coaxially arranged with the gear, the pawl is arranged in the box body, one end of the pawl is pressed against the ratchet, and a driving member that drives the pawl to rotate is provided on the outside of the box body.

[0007] By adopting the above technical solution, when in use, the rotating member drives the gear to rotate, and when the gear rotates, it drives the ratchet to rotate, and the gear drives the driving racks on both sides to move in opposite directions, and the driving rack drives the pin at one end of the connecting rod to be inserted into the door frame. At this time, the ratchet stops rotating, and the pawl presses against the ratchet, and the ratchet cannot rotate in the opposite direction. At this time, the position of the driving rack is fixed, and the pins at both ends are fixed to the door frame, and the protective door is locked. When it needs to be opened, the driving member drives the pawl to separate from the ratchet, and the rotating gear drives the pin to disengage from the door frame, so as to quickly and reliably lock the protective door to ensure the safety of workers and prevent unauthorized entry and exit.

[0008] Optionally, the rotating member includes a rotating shaft and a handle, the rotating shaft is rotatably mounted on the box body, the gear and the ratchet are connected to the rotating shaft, the gear and the ratchet are coaxially arranged with the rotating shaft, and the handle is arranged on the outside of the box body and connected to one end of the rotating shaft.

[0009] By adopting the above technical solution, the handle is rotated to drive the rotating shaft to rotate, and the rotating shaft drives the gear to rotate to drive the driving rack to slide and lock, and at the same time the ratchet rotates and the pawl locks the ratchet, so the driving operation is more convenient.

[0010] Optionally, the driving member includes a rotating shaft and a rotating handle, the rotating shaft is rotatably mounted on the box body, the pawl is connected to the rotating shaft, and the rotating handle is arranged at both ends of the rotating shaft.

[0011] By adopting the above technical solution, when the locking device needs to be opened, the handle is rotated to drive the shaft to rotate and then drive the pawl to rotate, separating one end of the pawl from the ratchet wheel. At this time, the rotating gear drives the driving rack to slide, and the driving rack drives the pins on both sides to disengage from the door frame. At this time, the protective door is opened, and the unlocking operation of the protective door locking device is more convenient.

[0012] Optionally, a first spring is arranged on the outside of the box body, one end of the first spring is connected to a side wall of the box body, and one end of the first spring is connected to the handle.

[0013] By adopting the above technical solution, when the ratchet wheel rotates, the pawl is pushed to rotate. At this time, the first spring pushes the rotating handle and drives the pawl to press against the ratchet wheel. When the ratchet wheel is rotated, the pawl presses against the ratchet wheel. When locked, the pawl is not easy to fall off the ratchet wheel.

[0014] Optionally, a limiting member is provided on the outside of the box body, and the limiting member includes a limiting rod and a push rod, the limiting rod is provided on the box body, the push rod is slidably installed on the limiting rod, a second spring is provided on the limiting rod, one end of the push rod is connected to one end of the second spring, and a through hole is provided on the turning handle for inserting one end of the push rod.

[0015] By adopting the above technical solution, when the protective door needs to be temporarily opened, the handle is rotated to the position of the push rod, and the second spring pushes one end of the push rod to be inserted into the through hole of the handle. At this time, the position of the handle is fixed, the pawl is separated from the ratchet wheel, and the gear can freely drive the drive rack to slide. During operation, there is no need to push the handle and the handle at the same time, which facilitates the operation of opening the protective door.

[0016] Optionally, the handle is provided with a slot on one side of the through hole.

[0017] By adopting the above technical solution, when the handle rotates, one end of the push rod slides along the slot to the through hole of the handle and automatically tightens during the rotation process, which makes the operation more convenient.

[0018] Optionally, a ball bearing is provided at one end of the push rod.

[0019] By adopting the above technical solution, the ball at one end of the push rod slides along the groove, and the sliding connection is transformed into a rolling connection, thereby reducing the wear on the turning handle.

[0020] Optionally, an anti-slip sleeve is provided on the handle.

[0021] By adopting the above technical solution, the anti-slip sleeve is held during rotation, and manual rotation operation is convenient and not easy to slip out of the hand.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When the gear rotates, it drives the ratchet to rotate, and the gear drives the driving racks on both sides to move in opposite directions. The driving rack drives the latch at one end of the connecting rod to be inserted into the door frame. At this time, the ratchet stops rotating, and the pawl presses against the ratchet, so that the ratchet cannot rotate in the opposite direction. At this time, the position of the driving rack is fixed, and the latches at both ends are fixed to the door frame, and the protective door is locked. When it needs to be opened, the driving member drives the pawl to separate from the ratchet, and the rotating gear drives the latch to disengage from the door frame, so as to quickly and reliably lock the protective door, ensuring the safety of workers and preventing unauthorized access;

[0024] 2. The handle rotates to the position of the push rod, and the second spring pushes one end of the push rod to be inserted into the through hole of the handle. At this time, the handle is fixed, the pawl is separated from the ratchet, and the gear can freely drive the drive rack to slide. It is not necessary to push the handle and the handle at the same time during operation, which is convenient for opening the protective door;

[0025] 3. The ball bearing at one end of the push rod slides along the groove, and the sliding connection is transformed into a rolling connection, reducing the wear on the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure inside the box body of the present application.

[0028] Figure 3 It is a schematic diagram of the enlarged three-dimensional structure of part A of the present application.

[0029] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be magnified relative to other elements to help improve understanding of the embodiments of the present invention.

[0030] Figure numerals: 1. box body; 11. mounting groove; 12. positioning rod; 13. first spring; 2. gear; 3. driving rack; 31. connecting rod; 4. rotating member; 41. rotating shaft; 42. handle; 421. anti-slip sleeve; 5. locking mechanism; 51. ratchet; 52. pawl; 6. driving member; 61. rotating shaft; 62. rotating handle; 621. through hole; 622. slot; 7. limiting member; 71. limiting rod; 72. push rod; 721. ball; 73. second spring. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] The present application discloses a ratchet locking device for a tunnel protection door handle, referring to Figure 1 and Figure 2 , including a box body 1, which is vertically fixed on the protective door, and a driving assembly is arranged on the box body 1, and the driving assembly includes a gear 2 and a driving rack 3. A mounting groove 11 is arranged on the inner side of the box body 1, and the gear 2 is rotatably mounted on the mounting groove 11 of the box body 1, and the driving rack 3 is slidably mounted on the mounting groove 11 of the box body 1, and the two ends of the driving rack 3 are located on the outer side of the box body 1.

[0033] Reference Figure 1 and Figure 2 A rotating member 4 is provided on the box body 1, and the rotating member 4 includes a rotating shaft 41 and a handle 42. The rotating shaft 41 is rotatably installed on the box body 1 and the rotating shaft 41 and the protective door are perpendicular to each other. One end of the rotating shaft 41 passes through the box body 1 through the mounting groove 11 of the box body 1 and is located outside the box body 1. The gear 2 is connected to the rotating shaft 41, and the gear 2 and the rotating shaft 41 are coaxially arranged. The handle 42 is arranged at both ends of the rotating shaft 41 and is located outside the box body 1. An anti-slip sleeve 421 is provided on the handle 42. The handle 42 and the rotating shaft 41 are perpendicular to each other. Rotating the handle 42 drives the rotating shaft 41 to rotate, and the rotating shaft 41 drives the gear 2 to rotate.

[0034] Reference Figure 1 and Figure 2The driving racks 3 are located at opposite sides of the gear 2 and are arranged opposite to each other. The driving racks 3 on both sides are respectively meshed with the gear 2 at opposite sides. When the gear 2 rotates, the driving racks 3 on both sides move in opposite directions. A connecting rod 31 is arranged on the driving rack 3. The connecting rods 31 on both sides are respectively located at the upper and lower sides of the box body 1. A latch is arranged at one end of the connecting rod 31. When the gear 2 rotates, the driving rack 3 moves to drive the latches at both ends of the connecting rod 31 to be inserted into the door frame, and the protective door is locked.

[0035] Reference Figure 2 A locking mechanism 5 is arranged inside the box 1. The locking mechanism 5 includes a ratchet 51 and a pawl 52. The ratchet 51 is connected to the rotating shaft 41 and is arranged coaxially with the gear 2. The pawl 52 is rotatably installed in the box 1. One end of the pawl 52 is pressed against the ratchet 51. A driving member 6 is arranged outside the box 1. When the gear 2 rotates, the ratchet 51 is driven to rotate. When the ratchet 51 stops rotating, the pawl 52 is pressed against the ratchet 51, and the ratchet 51 cannot rotate in the opposite direction. At this time, the position of the driving rack 3 is fixed, and the latches at both ends are fixed to the door frame, and the protective door is locked. When it needs to be opened, the driving member 6 drives the pawl 52 to separate from the ratchet 51, and the rotating gear 2 drives the latch to disengage from the door frame, so that the protective door is quickly and reliably locked to ensure the safety of workers and prevent unauthorized access.

[0036] Reference Figure 2 The driving member 6 includes a rotating shaft 61 and a rotating handle 62. The rotating shaft 61 is rotatably mounted on the box body 1. The rotating shaft 61 and the rotating shaft 41 are arranged parallel to each other. The pawl 52 is connected to the rotating shaft 61. Both ends of the rotating shaft 61 pass through the box body 1 and are located outside the box body 1. The rotating handle 62 is arranged at both ends of the rotating shaft 61. Rotating the rotating handle 62 drives the rotating shaft 61 to rotate and then drives the pawl 52 to rotate, separating one end of the pawl 52 from the ratchet wheel 51. The gear 2 rotates to drive the driving rack 3 to slide, driving the latches on both sides to disengage from the door frame, and the protective door opens.

[0037] Reference Figure 2 and Figure 3 Positioning rods 12 are provided on opposite sides of the box body 1, and a first spring 13 is provided on the outer side of the box body 1. One end of the first spring 13 is connected to the positioning rod 12, and the end of the first spring 13 away from the positioning rod 12 is connected to a side wall of the rotating handle 62. When the ratchet 51 rotates, it pushes the pawl 52 to rotate. At this time, the first spring 13 pushes the rotating handle 62 and drives the pawl 52 to press against the ratchet 51. When the ratchet 51 is rotated, the pawl 52 presses against the ratchet 51. When the ratchet 51 is rotated, the pawl 52 is pressed against the ratchet 51. When the ratchet 51 is locked, the pawl 52 is not easy to fall off from the ratchet 51.

[0038] Reference Figure 3A limiting member 7 is arranged on the outer side of the box body 1. The limiting member 7 includes a limiting rod 71 and a push rod 72. The limiting rod 71 is arranged on a side wall of the box body 1 and is perpendicular to a side of the box body 1. The push rod 72 is slidably installed on one side of the limiting rod 71. A second spring 73 is arranged on the inner side of the limiting rod 71. One end of the push rod 72 is connected to one end of the second spring 73. A through hole 621 is provided on the rotating handle 62. When the protective door needs to be temporarily opened, the rotating handle 62 is rotated to the position of the push rod 72. The second spring 73 pushes one end of the push rod 72 to be inserted into the through hole 621 of the rotating handle 62. At this time, the rotating handle 62 is fixed, the pawl 52 is separated from the ratchet wheel 51, and the gear 2 can freely drive the driving rack 3 to slide. During operation, it is not necessary to push the rotating handle 62 and the handle 42 at the same time, which is convenient for opening the protective door.

[0039] Reference Figure 3 The handle 62 is provided with a slot 622 at one side of the through hole 621. When the handle 62 rotates, one end of the push rod 72 slides along the slot 622 to the through hole 621 of the handle 62, and automatically presses against it during the rotation process. The end of the push rod 72 away from the second spring 73 is provided with a ball 721. The ball 721 at one end of the push rod 72 slides along the slot 622, and the sliding connection is changed into a rolling connection, thereby reducing the wear on the handle 62.

[0040] The implementation principle of a handle-type ratchet locking device for a tunnel protective door in the embodiment of the present application is as follows: rotating the handle 42 drives the gear 2 to rotate, the ratchet 51 rotates synchronously, and the driving racks 3 on both sides of the gear 2 move in the opposite direction, driving the pin at the connecting rod 31 to be inserted into the door frame. At this time, the ratchet 51 stops rotating, and the pawl 52 presses against the ratchet 51, and the ratchet 51 cannot rotate in the opposite direction. At this time, the pins at both ends are fixed to the door frame, and the protective door is locked. When it needs to be opened, the turning handle 62 is pushed to the top rod 72 on one side and fixed. At this time, the pawl 52 is separated from the ratchet 51, and the rotating gear 2 drives the pin to disengage from the door frame, and the protective door opens. After the top rod 72 is disengaged from the turning handle 62, the protective door can be closed again.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A ratchet locking device for a tunnel protective door handle, comprising a housing (1), the housing (1) being fixedly mounted on the protective door, the housing (1) being provided with a driving assembly, the driving assembly comprising a gear (2) and a driving rack (3), the gear (2) being rotatably mounted on the housing (1), the housing (1) being provided with a rotating member (4) for driving the gear (2) to rotate, the driving rack (3) being slidably mounted on the housing (1) and being located at opposite sides of the gear (2), the driving rack (3) being meshed with the gear (2), the driving racks (3) on both sides being provided with connecting rods (31), the connecting rods (31) being respectively located at both sides of the housing (1), and a latch being provided at one end of the connecting rod (31), characterized in that: A locking mechanism (5) is arranged inside the box body (1), and the locking mechanism (5) comprises a ratchet (51) and a pawl (52). The ratchet (51) is connected to the gear (2) and is arranged coaxially with the gear (2). The pawl (52) is arranged inside the box body (1), and one end of the pawl (52) is tightly pressed against the ratchet (51). A driving member (6) for driving the pawl (52) to rotate is arranged outside the box body (1).

2. A ratchet locking device for a tunnel protection door handle according to claim 1, characterized in that: The rotating member (4) comprises a rotating shaft (41) and a handle (42); the rotating shaft (41) is rotatably mounted on the box body (1); the gear (2) and the ratchet (51) are connected to the rotating shaft (41); the gear (2) and the ratchet (51) are both coaxially arranged with the rotating shaft (41); and the handle (42) is arranged outside the box body (1) and connected to one end of the rotating shaft (41).

3. A ratchet locking device for a tunnel protection door handle according to claim 1, characterized in that: The driving member (6) comprises a rotating shaft (61) and a rotating handle (62); the rotating shaft (61) is rotatably mounted on the box body (1); the pawl (52) is connected to the rotating shaft (61); and the rotating handle (62) is arranged at both ends of the rotating shaft (61).

4. A ratchet locking device for a tunnel protection door handle according to claim 3, characterized in that: A first spring (13) is arranged outside the box body (1), one end of the first spring (13) is connected to a side wall of the box body (1), and one end of the first spring (13) is connected to the rotating handle (62).

5. A ratchet locking device for a tunnel protection door handle according to claim 3, characterized in that: A limiting member (7) is arranged on the outer side of the box body (1), and the limiting member (7) comprises a limiting rod (71) and a push rod (72). The limiting rod (71) is arranged on the box body (1), and the push rod (72) is slidably mounted on the limiting rod (71). A second spring (73) is arranged on the limiting rod (71), and one end of the push rod (72) is connected to one end of the second spring (73). The rotating handle (62) is provided with a through hole (621) for inserting one end of the push rod (72).

6. A ratchet locking device for a tunnel protection door handle according to claim 5, characterized in that: The rotating handle (62) is provided with a slot (622) at one side of the through hole (621).

7. A ratchet locking device for a tunnel protection door handle according to claim 5, characterized in that: A ball (721) is provided at one end of the push rod (72).

8. A ratchet locking device for a tunnel protection door handle according to claim 2, characterized in that: The handle (42) is provided with an anti-slip sleeve (421).

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