A fire-fighting mechanical emergency start device

Abstract

The present invention discloses a fire-fighting mechanical emergency starting device, which includes a U-shaped fixing seat, a push-rod electric switch, a switch push rod, a shaft and a contactor. A push-rod handle is installed at the outer end of the push rod of the push-rod electric switch, and the other end is connected to one end of a connecting pipe. The other end of the connecting pipe is connected to one end of a connecting block, and the other end of the connecting block is connected to one end of the shaft. The shaft is installed on the U-shaped fixing seat. A plurality of push-rod brackets are movably connected to the shaft. A cam is sleeved on the shaft and installed in the push-rod brackets. One end of the switch push rod is located in the push-rod brackets and corresponds to the cam. A contactor is provided at the other end of the push-rod brackets. A push block is provided at one end of the switch push rod close to the contactor. The structure of the present invention is simple and the installation is convenient. It can be applied to contactors of different models, expanding the scope of application; the installation positions of the push-rod brackets and the shaft sleeve can be adjusted according to the installation position of the contactor to avoid deviations, thus solving the phenomenon of contact failure and inability to work.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire-fighting equipment, and particularly relates to a fire-fighting mechanical emergency starting device. Background Art

[0002] According to Article 11.0.12 of the Technical Code for Fire Protection Water Supply and Hydrant Systems GB50974-2014, it is proposed that (the fire pump control cabinet shall be provided with a manual mechanical pump starting function, and it shall be ensured that in case of a failure of the control circuit in the control cabinet, the fire pump can be started emergently by the personnel with management authority. When operating manually, it shall work normally within 5 minutes after the alarm).

[0003] The fire cabinet control box is mainly a device for installing electrical components such as relays and control switches. The fire control box is applicable to the control of fire pumps in industrial and mining enterprises, schools, and public buildings, and can be automatically controlled or manually operated.

[0004] The current electric switch ejector rod is only applicable to the contactors with front contact, and its practical range is small, with strong limitations. Summary of the Invention

[0005] The purpose of the present invention is to provide a simple-structured and easily-installed electric switch for a fire cabinet to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A fire-fighting mechanical emergency starting device includes a U-shaped fixing seat, a push rod electric switch, a switch ejector rod, a shaft, and a contactor. A push rod handle is installed at the outer end of the push rod of the push rod electric switch, and the other end is connected to one end of a connecting pipe. The other end of the connecting pipe is connected to one end of a connecting block, and the other end of the connecting block is connected to one end of the shaft. The shaft is installed on the U-shaped fixing seat. A plurality of ejector rod brackets are movably connected to the shaft. The cam is sleeved on the shaft and installed in the ejector rod brackets. One end of the switch ejector rod is located in the ejector rod brackets and corresponds to the cam. A contactor is provided at the other end of the ejector rod brackets. A push block is provided at one end of the switch ejector rod close to the contactor. When the push rod handle is pushed upward, the connecting block is driven through the connecting pipe. The connecting block drives the shaft to rotate clockwise. The shaft drives the cam to rotate. The rotating cam contacts the switch ejector rod and pushes the switch ejector rod onto the contact point of the contactor, making the contactor energized.

[0007] A further improvement of the present invention lies in that: waist-shaped holes are opened on the side plates of the U-shaped fixing seat. The push rod handle is sleeved on the locking bolt of the ejector rod bracket through a shaft and locked by a nut. The installation position of the ejector rod bracket and the shaft sleeve can be adjusted according to the installation position of the contactor to avoid deviation, thereby solving the phenomenon of contact failure and inability to work.

[0008] A further improvement of the present invention lies in that a plurality of ejector rod brackets are movably connected to the shaft.

[0009] A further improvement of the present invention lies in that the shaft is sleeved on the U-shaped fixing seat through a sheath, and the sheath can prevent friction and wear between the shaft and the fixing seat, and at the same time can also limit the position of the shaft.

[0010] A further improvement of the present invention lies in that a nylon block is installed on the shaft, and a first microswitch and a second microswitch are installed on the inner wall of the U-shaped fixing seat opposite to the nylon block. The first microswitch corresponds to the upper protrusion of the nylon block, and the second microswitch corresponds to the lower protrusion of the nylon block. The two normally closed signals are connected in series and also connected in series with the secondary control circuit in the control cabinet to avoid short-circuit phenomena of the components in the electrical cabinet caused by incorrect operation of the secondary control when the control cabinet is in the mechanical startup state.

[0011] A further improvement of the present invention lies in that the length of the connecting pipe is adjustable to adjust the distance between the switch ejector rod and the contactor.

[0012] A further improvement of the present invention lies in that double-headed threads are provided at both ends of the connecting pipe, one end is a right-handed thread and the other end is a left-handed thread. The push rod handle and the connecting block are both screwed to the connecting pipe through fish-eye bearings and locked by nuts. The adjustment of the length of the connecting pipe is realized through the double-eye bearings and the double-headed threads.

[0013] The technical effects and advantages of the present invention:

[0014] The structure is simple and the installation is convenient. It can be applied to contactors of different models, expanding the scope of application; the installation positions of the ejector rod bracket and the shaft sleeve can be adjusted according to the installation position of the contactor to avoid deviation, thus solving the phenomenon of contact failure and inability to work; the shaft is sleeved on the U-shaped fixing seat through a sheath, and the sheath can prevent friction and wear between the shaft and the fixing seat, and at the same time can also limit the position of the shaft; the push rod handle and the connecting block are both screwed to the connecting pipe through fish-eye bearings and locked by nuts. The adjustment of the length of the connecting pipe is realized through the double-eye bearings and the double-headed threads. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figures 1-2 is a schematic structural diagram of the present invention;

[0016] In the figure: 1 U-shaped fixing seat, 2 push rod switch, 3 switch ejector rod, 4 shaft, 5 contactor, 6 push rod handle, 7 connecting pipe, 8 connecting block, 9 waist-shaped hole, 10 ejector rod bracket, 11 cam, 12 push block, 13 sheath, 14 nylon block, 15 first microswitch, 16 second microswitch, 17 shaft sleeve, 18 locking bolt. DETAILED DESCRIPTION OF THE INVENTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] As Figures 1-2 shown, a specific implementation manner of a fire-fighting mechanical emergency starting device is as follows: It includes a U-shaped fixing seat 1, a push-rod electric switch 2, a switch push rod 3, a shaft 4 and a contactor 5. A push-rod handle 6 is installed at the outer end of the push rod of the push-rod electric switch 2, and the other end is connected to one end of a connecting pipe 7. The other end of the connecting pipe 7 is connected to one end of a connecting block 8. The other end of the connecting block 8 is connected to one end of the shaft 4. The shaft 4 is installed on the U-shaped fixing seat 1. Three ejector rod brackets 10 are movably connected to the shaft 4. A cam 11 is sleeved on the shaft 4 and installed inside the ejector rod brackets 10. One end of the switch push rod 3 is located inside the ejector rod brackets 10 and corresponds to the cam 11. A contactor 5 is provided at the other end of the ejector rod brackets 10. A push block 12 is provided at one end of the switch push rod 3 close to the contactor 5. When the push-rod handle 6 is pushed upward, the connecting block 8 is driven through the connecting pipe 7. The connecting block 8 drives the shaft 4 to rotate clockwise. The shaft 4 drives the cam 11 to rotate. The cam 11 rotates and contacts the switch push rod 3, pushing the switch push rod 3 onto the contact of the contactor 5 to energize the contactor 5;

[0019] A waist-shaped hole 9 is opened on the side plate of the U-shaped fixing seat 1. The push-rod handle 3 is arranged inside the locking bolt 18 of the ejector rod bracket 10 through a shaft sleeve 17 and locked with a nut. The installation positions of the ejector rod bracket 10 and the shaft sleeve 17 can be adjusted according to the installation position of the contactor 5 to avoid deviation, thereby solving the phenomenon of contact failure and inability to work;

[0020] The shaft 4 is installed on the U-shaped fixing seat 1 through a sheath 13. The sheath 13 can prevent friction and wear between the shaft 4 and the fixing seat 1, and at the same time can also limit the position of the shaft 4.

[0021] A nylon block 14 is installed on the shaft 4. A first micro switch 15 and a second micro switch 16 are installed on the inner wall of the U-shaped fixing seat 1 opposite to the nylon block 14. The first micro switch 15 corresponds to the upper protrusion of the nylon block 14, and the second micro switch 16 corresponds to the lower protrusion of the nylon block 14. The two normally closed signals are connected in series and also connected in series with the secondary control circuit in the control cabinet to avoid short-circuit phenomena of the components in the electrical cabinet caused by incorrect operation of the secondary control when the control cabinet is in the mechanical starting state.

[0022] Both ends of the connecting pipe 7 are provided with double-headed threads, one with a right-handed thread and the other with a left-handed thread. The push rod handle 6 and the connecting block 8 are both screwed to the connecting pipe 7 through spherical bearings and locked with nuts. The adjustment of the length of the connecting pipe 7 is achieved through the double-eye bearings and the double-headed threads.

[0023] The structure of the present invention is simple and easy to install. It can be applied to contactors of different models, expanding the scope of application. It can adjust the relative position with the contactor to avoid the phenomenon that the contactor fails and cannot work. The installation positions of the ejector rod bracket and the bushing can be adjusted according to the installation position of the contactor to avoid deviation, thus solving the problem of contact failure and inability to work. The shaft is installed on the U-shaped fixing seat through the protective sleeve. The protective sleeve can prevent friction and wear between the shaft and the fixing seat, and at the same time can also limit the position of the shaft. The push rod handle and the connecting block are both screwed to the connecting pipe through spherical bearings and locked with nuts. The adjustment of the length of the connecting pipe is achieved through the double-eye bearings and the double-headed threads.

[0024] The applicant further declares that the present invention uses the above embodiments to illustrate the implementation method and device structure of the present invention, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the implementation method selected by the present invention, addition of steps, and selection of specific methods, etc., all fall within the protection scope and the disclosed scope of the present invention.

[0025] The present invention is not limited to the above embodiments. All methods that adopt a structure similar to that of the present invention and its methods to achieve the purpose of the present invention are within the protection scope of the present invention.

Claims

1. A fire-fighting mechanical emergency starting device, characterized in that: It includes a U-shaped fixing seat (1), a push-rod electric switch (2), a switch push rod (3), a shaft (4) and a contactor (5). A push-rod handle (6) is installed at the outer end of the push rod of the push-rod electric switch (2), and the other end is connected to one end of a connecting pipe (7). The other end of the connecting pipe (7) is connected to one end of a connecting block (8). The other end of the connecting block (8) is connected to one end of the shaft (4). The shaft (4) is installed on the U-shaped fixing seat (1). A plurality of push-rod brackets (10) are movably connected to the shaft (4). A cam (11) is sleeved on the shaft (4) and installed inside the push-rod bracket (10). One end of the switch push rod (3) is located inside the push-rod bracket (10) and corresponds to the cam (11). A contactor (5) is provided at the other end of the push-rod bracket (10). A push block (12) is provided at one end of the switch push rod (3) close to the contactor (5). When the push-rod handle (6) is pushed upward, it drives the connecting block (8) through the connecting pipe (7). The connecting block (8) drives the shaft (4) to rotate clockwise. The shaft (4) drives the cam (11) to rotate. The rotation of the cam (11) contacts the switch push rod (3), pushing the switch push rod (3) onto the contact point of the contactor (5) to energize the contactor (5). A waist-shaped hole (9) is opened on the side plate of the U-shaped fixing seat (1). The push-rod handle (6) is arranged inside the locking bolt (18) of the push-rod bracket (10) through a shaft sleeve (17) and locked with a nut. Three push-rod brackets (10) are movably connected to the shaft (4).

2. The fire-fighting mechanical emergency starting device according to claim 1, wherein: The shaft (4) is installed on the U-shaped fixing seat (1) through a sheath (13).

3. The emergency starting device for fire fighting machinery according to claim 1, wherein: A nylon block (14) is installed on the shaft (4). A first microswitch (15) and a second microswitch (16) are installed on the inner wall of the U-shaped fixing seat (1) opposite to the nylon block (14). The first microswitch (15) corresponds to the upper protrusion of the nylon block (14), and the second microswitch (16) corresponds to the lower protrusion of the nylon block (14).

4. A fire-fighting mechanical emergency start device according to claim 1, characterized in that: The length of the connecting pipe (7) is adjustable.

5. The fire-fighting mechanical emergency starting device according to claim 4, wherein: Double-headed threads are provided at both ends of the connecting pipe (7), one with a right-hand thread and the other with a left-hand thread. The push-rod handle (6) and the connecting block (8) are both screwed to the connecting pipe (7) through fish-eye bearings and locked with nuts.

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