CN113506432B - Large-scale server power failure alarm - Google Patents

Abstract

The invention relates to the field of power failure alarms, in particular to a large-scale server power failure alarm, which includes a power failure alarm body, a detection mechanism, an adjustment mechanism, and a locking mechanism. The opening and closing of the main mechanism is detected, so as to judge whether the main mechanism of the power failure alarm fails, which is conducive to timely inspection and maintenance when the power failure alarm fails; the use of the adjustment mechanism can detect the power failure alarm in the detection mechanism When the main mechanism fails to close, adjust it so that the main mechanism of the power failure alarm can resume normal work, and its adjustment is easy to use, and the adjustment operation can be performed without professional electricians; the use of the locking mechanism can be detected by the detection mechanism When the main body of the power failure alarm breaks down, the main body of the power failure alarm can temporarily restore the working state to ensure that the circuit is in the energized state, and can temporarily supply power to the electrical appliances in the circuit so that the electrical appliances can work normally, and then report for repairs Wait for electrician to check.

Description

A large server power failure alarm

technical field

The invention relates to the field of power failure alarms, in particular to a large-scale server power failure alarm.

Background technique

In the prior art, the monitoring of the power failure alarm is realized by setting auxiliary contacts, but the auxiliary contacts are similar to the dynamic and static contacts of the power failure alarm, and are prone to sticking, and the auxiliary contacts need a certain amount of force to switch on and off. This will divide the force of the dynamic and static contacts of the power failure alarm load, reduce the load breaking or holding force, and also reduce the main load breaking and load capacity; in addition, when the power failure alarm fails, it generally needs to be repaired It takes a long time to wait for a professional electrician to overhaul, and before the electrician overhauls, the power failure alarm is in a fault state and the circuit cannot work normally, which affects the use of electrical appliances in the circuit.

Contents of the invention

Aiming at the problems in the prior art, the invention provides a large-scale server power failure alarm.

The technical solution adopted by the present invention to solve the technical problem is: a large-scale server power failure alarm, including a power failure alarm main body mechanism, a detection mechanism, an adjustment mechanism, and a locking mechanism, which are used to control the main body of the power failure alarm. The detection mechanism for detecting the opening and closing of the mechanism is installed in the main body of the power failure alarm, and the adjustment mechanism for adjusting the opening and closing arm in the main body of the power failure alarm is installed in the power failure alarm. The upper end of the main mechanism of the fault alarm, which is used to lock the main body of the power failure alarm so that the locking mechanism of the main body of the power failure alarm is in a normally closed state is installed on the main body of the power failure alarm The top of the institution.

Further, the main body mechanism of the power failure alarm includes a housing, a base, a plurality of pins, a spring, an iron core coil, a column, a shrapnel, an armature, a static contact, and a moving contact, and a plurality of the pins are fixedly installed On one side of the base, the housing is fixedly installed on the top surface of the base, the iron core coil is fixedly installed on the middle part of the top surface of the base, the spring and the column are fixedly installed on the top surface of the base respectively. The top surface of the base is located on both sides of the iron core coil, the elastic piece is movably installed above the iron core coil through the adjustment mechanism, and the top surface of the elastic piece is fixedly installed with a The armature directly above, one end of the elastic piece is fixedly connected to the top of the spring, and the other end extends above the column, the static contact is fixedly installed on the top of the column, and the movable contact It is fixedly installed on the bottom surface of the shrapnel.

Further, the detection mechanism includes a photoelectric sensor, a light baffle, and a status indicator light, the photoelectric sensor is fixedly installed on the inner wall of the housing, and the photoelectric sensor is located below the end of the shrapnel, and the light baffle It is fixedly installed on the bottom surface of the end of the elastic piece, and the status indicator light is fixedly installed on the top surface of the housing and is electrically connected with the photoelectric sensor.

Further, the photoelectric sensor includes a U-shaped mounting base, a transmitter, and a receiver, the U-shaped mounting base is fixedly installed on the inner side wall of the housing, and the U-shaped opening of the U-shaped mounting base is facing The light blocking plate, the transmitter and the receiver are respectively fixedly installed on both sides of the U-shaped opening of the U-shaped mounting base.

Further, the adjustment mechanism includes a knob, a transmission rod, a first bevel gear, a second bevel gear, a screw, a bearing, a threaded sleeve, a connecting rod, a sliding sleeve, a fixing seat, and a sliding rod, and the transmission rod is movably inserted on the housing, and the top end of the transmission rod is fixedly installed with the knob located on the top surface of the housing, and the bottom end of the transmission rod is fixedly installed with the first knob located inside the housing. A bevel gear, the screw rod is movably mounted on the top wall of the housing through the bearing, the second bevel gear is fixedly mounted on one end of the screw rod, and meshed with the first bevel gear in transmission connection , the threaded sleeve is threadedly mounted on the screw rod, the sliding rod is fixedly mounted on the top surface of the elastic piece through the fixing seat, the sliding sleeve is slidably fitted on the sliding rod, and the sliding rod The sleeve is fixedly connected with the threaded sleeve through the connecting rod.

Further, the locking mechanism includes a threaded cylinder, a threaded hole, a threaded column, an inner hexagonal hole, a pressure rod, a limit boss, and a buffer pad, the threaded cylinder is fixedly installed on the top of the housing, and the threaded A threaded hole is provided inside the barrel and extends to the inside of the housing, and the threaded barrel is located above the end of the elastic sheet, the threaded column is threadedly installed in the threaded hole, and the bottom end of the threaded hole is set There is the limiting boss, the top of the threaded column is provided with the inner hexagonal hole, the bottom end of the threaded column is fixedly mounted with the pressure rod, and the bottom end of the pressure rod is fixedly mounted with the cushion.

Further, a pull cord is connected to the bottom end of the pressure rod, and the bottom end of the pull cord is fixedly connected to the top surface of the end of the elastic piece.

Beneficial effects of the present invention:

(1) In the power failure alarm for a large server of the present invention, the use of the detection mechanism can detect the opening and closing of the main body of the power failure alarm, thereby judging whether the main body of the power failure alarm fails and the type of failure , which is conducive to timely inspection and maintenance when the power failure alarm fails; that is, when the control circuit of the main body of the power failure alarm is connected, if it is detected that the main body of the power failure alarm is in a closed state, it means that the power failure The main mechanism of the alarm is working normally without fault. If it is detected as disconnection, it means that the main mechanism of the power failure alarm has failed; when the control circuit of the main mechanism of the power failure alarm is disconnected, if the power failure alarm is detected If the main mechanism is in the closed state, it means that the main mechanism of the power failure alarm has failed. If it is detected as disconnected, it means that the main mechanism of the power failure alarm is working normally and there is no failure.

(2) In the power failure alarm for a large server of the present invention, the use of the adjustment mechanism can be adjusted when the detection mechanism detects that the main body of the power failure alarm has a closed fault, so that the main body of the power failure alarm It can return to normal work, and its adjustment is easy to use, and the adjustment operation can be performed without a professional electrician; that is, when the spring force in the main body of the power failure alarm decreases, it cannot drive the moving contact to move and reset or arc welding occurs between the moving and static contacts When the dynamic and static contacts are stuck, the fulcrum position of the shrapnel can be adjusted by the adjustment mechanism, thereby changing the ratio of the force arms at both ends of the shrapnel. When the spring force remains unchanged, the tension on one end of the moving contact on the shrapnel is increased, thereby driving the dynamic and static contacts. The contacts are separated, so that the main body of the power failure alarm can resume normal operation.

(3) A large-scale server power failure alarm according to the present invention, the use of the locking mechanism can be locked and adjusted when the detection mechanism detects that the main mechanism of the power failure alarm is disconnected, so that the power failure The main mechanism of the alarm can temporarily restore the working state; that is, when the armature falls off or the coil is disconnected and other faults occur, and the moving contact cannot be driven to move and the static contact to close, the moving contact can be driven to move and the static contact can be driven by the locking mechanism. Contact and lock it and fix it, so that the main body of the power failure alarm can be temporarily in a closed working state to ensure that the circuit is in a energized state, and can temporarily supply power to the electrical appliances in the circuit, so that the electrical appliances can work normally, and then report for repairs and wait for the electrician overhaul.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the overall structure of a preferred embodiment of a large-scale server power failure alarm provided by the present invention;

Fig. 2 is the sectional view of M-M direction of Fig. 1;

Fig. 3 is the structural representation of the photoelectric sensor shown in Fig. 2;

Fig. 4 is a schematic diagram of the enlarged structure at A in Fig. 2;

Fig. 5 is a schematic diagram of the enlarged structure at B of Fig. 2;

In the figure: 1. Main mechanism of power failure alarm; 11. Shell; 12. Base; 13. Pin; 14. Spring; 15. Iron core coil; 16. Column; 17. Shrapnel; 18. Armature; 19. Static contact; 1a, moving contact; 2, detection mechanism; 21, photoelectric sensor; 211, U-shaped mounting seat; 212, transmitter; 213, receiver; 22, light barrier; 23, status indicator light; 3, Adjusting mechanism; 31, knob; 32, transmission rod; 33, first bevel gear; 34, second bevel gear; 35, screw rod; 36, bearing; 37, thread sleeve; 38, connecting rod; 39, sliding sleeve; 3a, fixed seat; 3b, sliding rod; 4, locking mechanism; 41, threaded cylinder; 42, threaded hole; 43, threaded column; 44, inner hexagonal hole; 45, pressure rod; 46, limit boss; 47 , Cushion pad; 48, Drawstring.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

As shown in Figures 1 to 5, a large-scale server power failure alarm according to the present invention includes a main body mechanism 1 of the power failure alarm, a detection mechanism 2, an adjustment mechanism 3, and a locking mechanism 4, which are used to control the The detection mechanism 2 for detecting the opening and closing of the main mechanism 1 of the power failure alarm is installed in the main mechanism 1 of the power failure alarm, and is used to adjust the opening and closing arm of the main mechanism 1 of the power failure alarm The adjustment mechanism 3 is installed on the upper end of the main mechanism 1 of the power failure alarm, and is used to lock the main mechanism 1 of the power failure alarm so that the main mechanism 1 of the power failure alarm is in a normally closed state. The locking mechanism 4 is installed on the upper end of the main mechanism 1 of the power failure alarm; the use of the detection mechanism 2 can detect the opening and closing of the main mechanism 1 of the power failure alarm, thereby judging the main mechanism 1 of the power failure alarm. Whether there is a failure, it is beneficial to timely check and repair when the main mechanism 1 of the power failure alarm fails; Adjust, so that the main mechanism 1 of the power failure alarm can return to normal work, and its adjustment is convenient to use, and the adjustment operation can be performed without a professional electrician; the use of the locking mechanism 4 can detect the power failure alarm in the detection mechanism 2 When the main mechanism 1 breaks down, it can be locked and adjusted, so that the main mechanism 1 of the power failure alarm can temporarily restore the working state, ensure that the circuit is in the energized state, and provide temporary power supply for the electrical appliances in the circuit, so that the electrical appliances can be normal Work, and then report for repairs and wait for the electrician to overhaul.

The main mechanism 1 of the power failure alarm includes a housing 11, a base 12, a plurality of pins 13, a spring 14, an iron core coil 15, a column 16, a shrapnel 17, an armature 18, a static contact 19, and a movable contact 1a, A plurality of pins 13 are fixedly installed on one side of the base 12, the housing 11 is fixedly installed on the top surface of the base 12, and the iron core coil 15 is fixedly installed on the top surface of the base 12. In the middle, the spring 14 and the column 16 are respectively fixedly installed on the top surface of the base 12 at the positions on both sides of the iron core coil 15, and the elastic piece 17 is movably installed on the iron core through the adjustment mechanism 3 Above the coil 15, and the top surface of the elastic piece 17 is fixedly installed with the armature 18 directly above the core coil 15, one end of the elastic piece 17 is fixedly connected to the top of the spring 14, and the other end extends To the top of the column 16, the static contact 19 is fixedly installed on the top of the column 16, and the movable contact 1a is fixedly installed on the bottom surface of the shrapnel 17; The control circuit is connected, and the static contact 19 and the movable contact 1a are connected to the working circuit through the pin 13. When the control circuit is closed and opened, the iron core coil 15 is energized to generate magnetic force, thereby attracting the armature 18 through magnetic attraction. Downward, and then with the adjusting mechanism 3 as a fulcrum, one end of the shrapnel 17 is driven downward, so that the movable contact 1a is in contact with the static contact 19, and the working circuit is turned on. Stretching; when the control circuit is disconnected and closed, the core coil 15 is powered off and degaussed, and no longer attracts the armature 18, and the spring 14 pulls the shrapnel 17 to rotate and reset, so that the movable contact 1a and the static contact Point 19 is separated and the working circuit is disconnected.

The detection mechanism 2 includes a photoelectric sensor 21, a light baffle 22, and a status indicator light 23. The photoelectric sensor 21 is fixedly installed on the inner wall of the housing 11, and the photoelectric sensor 21 is located below the end of the elastic piece 17. , the light blocking plate 22 is fixedly installed on the bottom surface of the end of the elastic piece 17, the status indicator light 23 is fixedly installed on the top surface of the housing 11, and is electrically connected with the photoelectric sensor 21; the photoelectric sensor 21 It adopts the HPJ-A21 photoelectric sensor sold in Taibang flagship store, and its supporting circuit can be provided by the merchant. The status indicator light 23 adopts the LED metal two-color indicator light sold by Yueqing Yundu Electric Co., Ltd. When the shrapnel 17 When the moving contact 1a contacts and closes with the static contact 19 at the end, the light baffle plate 22 is then inserted into the photoelectric sensor 21, and the status indicator light 23 shows a green light. When the movable contact 1a is separated from the static contact 19, the light blocking plate 22 is separated from the photoelectric sensor 21. At this time, the status indicator 23 displays a red light, so that the status indicator 23 can The display color and the on-off status of the control circuit are used to determine whether the main body mechanism 1 of the power failure alarm is faulty.

The photoelectric sensor 21 includes a U-shaped mounting base 211, a transmitter 212, and a receiver 213. The U-shaped mounting base 211 is fixedly installed on the inner side wall of the housing 11, and the U of the U-shaped mounting base 211 The U-shaped opening faces the light baffle plate 22, and the transmitter 212 and the receiver 213 are respectively fixedly installed on both sides of the U-shaped opening of the U-shaped mounting base 211; when the movable contact 1a and the static contact 19 when the contact is closed, the light blocking plate 22 is then inserted between the transmitter 212 and the receiver 213, so that the receiver 213 cannot receive the light source information sent by the transmitter 212, at this time the The photoelectric sensor 21 outputs the closing signal of the dynamic and static contacts, and the status indicator light 23 shows a green light. When the movable contact 1a is separated from the static contact 19, the light baffle plate 22 no longer hinders the transmitter 212 and the Signals are sent and received between the receivers 213 , at this time, the photoelectric sensor 21 outputs a signal for separating the moving and static contacts, and the status indicator 23 displays a red light.

The adjustment mechanism 3 includes a knob 31, a transmission rod 32, a first bevel gear 33, a second bevel gear 34, a screw mandrel 35, a bearing 36, a threaded sleeve 37, a connecting rod 38, a sliding sleeve 39, a fixed seat 3a, a sliding rod 3b, the transmission rod 32 is movably inserted on the housing 11, and the top end of the transmission rod 32 is fixedly installed with the knob 31 on the top surface of the housing 11, and the bottom of the transmission rod 32 The first bevel gear 33 located inside the housing 11 is fixedly installed at the end, the screw rod 35 is movably installed on the top wall of the housing 11 through the bearing 36, and the second bevel gear 34 It is fixedly installed on one end of the screw rod 35, and is meshed with the first bevel gear 33 for transmission connection. The threaded sleeve 37 is screwed on the screw rod 35, and the slide rod 3b passes through the fixed seat 3a Fixedly installed on the top surface of the elastic piece 17, the sliding sleeve 39 is slidably fitted on the sliding rod 3b, and the sliding sleeve 39 and the threaded sleeve 37 are fixedly connected through the connecting rod 38; When the control circuit is disconnected and the status indicator light 23 continues to display a green light, it can be judged that the movable contact 1a and the static contact 19 are in a sticking state at this time, and the knob 31 can be rotated to drive the The transmission rod 32 rotates, and then drives the screw mandrel 35 to rotate through the engagement transmission between the first bevel gear 33 and the second bevel gear 34, so that the threaded sleeve 37 moves to the right along the screw mandrel 35 through screw drive. Move, and then drive the sliding sleeve 39 to move to the right along the sliding rod 3b through the connecting rod 38, thereby changing the position of the fulcrum of the shrapnel 17, and then changing the moment arm ratio at both ends of the shrapnel 17, in the spring 14 Under the condition of constant elastic force, increase the pulling force on one end of the moving contact 1a on the elastic piece 17, thereby driving the moving and static contacts to separate, so that the main body mechanism 1 of the power failure alarm returns to normal operation; the sliding sleeve 39 and the sliding rod 3b is a clearance fit, so that the sliding rod 3b has enough freedom to rotate with the shrapnel 17 .

The locking mechanism 4 includes a threaded cylinder 41, a threaded hole 42, a threaded column 43, an inner hexagonal hole 44, a pressure rod 45, a limiting boss 46, and a buffer pad 47. The threaded cylinder 41 is fixedly mounted on the housing 11, the inside of the threaded cylinder 41 is provided with a threaded hole 42 extending through the inside of the housing 11, and the threaded cylinder 41 is located above the end of the elastic piece 17, and the threaded column 43 is threadedly installed on the In the threaded hole 42, the bottom end of the threaded hole 42 is provided with the limiting boss 46, the top end of the threaded column 43 is provided with the inner hexagonal hole 44, and the bottom end of the threaded column 43 is fixedly installed. There is the pressure rod 45, and the bottom end of the pressure rod 45 is fixedly mounted with the buffer pad 47. When the control circuit is connected and the status indicator light 23 continues to display a red light, it can be judged that the power The main body mechanism 1 of the fault alarm has failures such as armature falling off or coil disconnection, which cannot drive the moving contact 1a to move and close the static contact 19. At this time, the threaded column 43 can be rotated through the inner hexagonal hole 44 to make the threaded column 43 drives the pressure rod 45 to go down, so that the pressure rod 45 squeezes one end of the shrapnel 17 down until the movable contact 1a and the static contact 19 are closed, so that the main body mechanism 1 of the power failure alarm can be temporarily in the closed working state, ensuring The working circuit is in the energized state, which can provide temporary power supply to the electrical appliances in the circuit, so that the electrical appliances can work normally, and then report for repair and wait for the electrician to overhaul.

The bottom end of the pressure rod 45 is connected with a pull rope 48, and the bottom end of the pull rope 48 is fixedly connected to the top surface of the end of the elastic piece 17. When the movable contact 1a is too tightly adhered to the static contact 19, When the moving contact 1a cannot be adjusted and separated from the static contact 19 by the adjustment mechanism 3, the threaded column 43 can be rotated to make it go up, thereby pulling the elastic piece 17 through the pull cord 48 to assist the moving contact. Point 1a is separated from the stationary contact 19 .

The working principle of the present invention is:

The working process of the power failure alarm: when the control circuit is closed and opened, the iron core coil 15 is energized to generate magnetic force, so that the armature 18 is attracted downward by the magnetic attraction force, and then the adjusting mechanism 3 is used as the fulcrum to drive one end of the shrapnel 17 downward to make the movable contact 1a Contact with the static contact 19, the working circuit is turned on, and at the same time, the other end of the shrapnel 17 goes up, so that the spring 14 is stretched and elongated; when the control circuit is disconnected and closed, the iron core coil 15 is powered off and degaussed, and the armature 18 is no longer attracted, and the spring 14 Pull the shrapnel 17 to rotate and reset, so that the movable contact 1a is separated from the static contact 19, and the working circuit is disconnected.

Power failure alarm detection process: when the movable contact 1a contacts and closes with the static contact 19, the light barrier 22 is then inserted between the transmitter 212 and the receiver 213, so that the receiver 213 cannot receive the light source emitted by the transmitter 212 Information, now the photoelectric sensor 21 outputs the closing signal of the dynamic and static contacts, and the status indicator light 23 shows a green light. When the movable contact 1a is separated from the static contact 19, the light baffle plate 22 no longer hinders the connection between the transmitter 212 and the receiver 213. At this time, the photoelectric sensor 21 outputs a dynamic and static contact separation signal, and the status indicator light 23 displays a red light; thus, it is possible to determine whether the power failure alarm is faulty and the type of fault through the on-off status of the status indicator lamp 23 and the control circuit .

Closed fault adjustment process: when the control circuit is disconnected and the status indicator light 23 continues to display a green light, it can be judged that the movable contact 1a and the static contact 19 are in a state of adhesion at this time, and the knob 31 can be rotated to drive the transmission rod 32 to rotate , and then through the engagement transmission between the first bevel gear 33 and the second bevel gear 34, the screw rod 35 is driven to rotate, so that the threaded sleeve 37 moves to the right along the screw rod 35 through the screw drive, and then the connecting rod 38 drives the sliding sleeve 39 along the The slide bar 3b moves to the right, thereby changing the position of the fulcrum of the shrapnel 17, and then changing the ratio of the moment arm at both ends of the shrapnel 17. Under the condition that the spring force of the spring 14 remains unchanged, the pulling force on one end of the upper movable contact 1a of the shrapnel 17 is increased, thereby Drive the dynamic and static contacts to separate, so that the main mechanism 1 of the power failure alarm returns to normal operation.

Open circuit fault adjustment process: when the control circuit is connected and the status indicator light 23 continues to display a red light, it can be judged that the main mechanism 1 of the power failure alarm has a failure such as armature falling off or coil disconnection, and the movable contact 1a cannot be driven to move and The static contact 19 is closed. At this time, the threaded column 43 can be rotated through the inner hexagonal hole 44, so that the threaded column 43 drives the pressure rod 45 to go down, so that the pressure rod 45 squeezes one end of the shrapnel 17 to go down until the movable contact 1a and the static contact. 19 is closed, so that the main mechanism 1 of the power failure alarm can be in the closed working state temporarily, to ensure that the working circuit is in the energized state, and can provide temporary power supply for the electrical appliances in the circuit, so that the electrical appliances can work normally, and then report for repair and wait for the electrician to overhaul.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also There are various changes and improvements, and these changes and improvements all fall within the scope of protection of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (1)

1. A large-scale server power failure alarm, characterized in that it includes a power failure alarm main body (1), a detection mechanism (2), an adjustment mechanism (3), and a locking mechanism (4), which are used to control the The detection mechanism (2) for detecting the opening and closing of the main mechanism (1) of the power failure alarm is installed in the main mechanism (1) of the power failure alarm, and is used to detect the main mechanism (1) of the power failure alarm The adjustment mechanism (3) that adjusts the inner opening and closing force arm is installed on the upper end of the main mechanism (1) of the power failure alarm, and is used to lock the main mechanism (1) of the power failure alarm so that the The locking mechanism (4) in which the main mechanism (1) of the power failure alarm is in a normally closed state is installed on the upper end of the main mechanism (1) of the power failure alarm; The main mechanism (1) of the power failure alarm includes a housing (11), a base (12), a plurality of pins (13), a spring (14), an iron core coil (15), a column (16), a shrapnel ( 17), an armature (18), a static contact (19), a moving contact (1a), a plurality of pins (13) are fixedly installed on one side of the base (12), and the housing (11 ) is fixedly installed on the top surface of the base (12), the iron core coil (15) is fixedly installed on the middle part of the top surface of the base (12), the spring (14) and the column (16) are respectively Fixedly installed on the top surface of the base (12) on both sides of the iron core coil (15), the elastic piece (17) is movably installed on the iron core coil (15) through the adjustment mechanism (3) above, and the top surface of the shrapnel (17) is fixedly installed with the armature (18) directly above the core coil (15), and one end of the shrapnel (17) is connected to the spring (14) The top of the column (16) is fixedly connected, and the other end extends above the column (16), the static contact (19) is fixedly installed on the top of the column (16), and the movable contact (1a) is fixedly installed on the The bottom surface of the shrapnel (17); The detection mechanism (2) includes a photoelectric sensor (21), a light baffle (22), and a status indicator light (23), the photoelectric sensor (21) is fixedly installed on the inner wall of the housing (11), and the The photoelectric sensor (21) is located below the end of the shrapnel (17), the light baffle plate (22) is fixedly installed on the bottom surface of the end of the shrapnel (17), and the status indicator light (23) is fixedly installed on the the top surface of the casing (11), and is electrically connected to the photoelectric sensor (21); The locking mechanism (4) includes a threaded cylinder (41), a threaded hole (42), a threaded column (43), an inner hexagonal hole (44), a pressure rod (45), a limit boss (46), and a buffer pad (47), the threaded cylinder (41) is fixedly mounted on the top end of the housing (11), and the threaded cylinder (41) is provided with a threaded hole (42) extending inside the housing (11) ), and the threaded barrel (41) is located above the end of the shrapnel (17), the threaded column (43) is threadedly installed in the threaded hole (42), and the bottom end of the threaded hole (42) The limiting boss (46) is provided, the hexagonal hole (44) is provided on the top end of the threaded column (43), and the pressing rod ( 45), the bottom end of the pressure rod (45) is fixedly mounted with the buffer pad (47); The photoelectric sensor (21) includes a U-shaped mounting base (211), a transmitter (212), and a receiver (213), and the U-shaped mounting base (211) is fixedly installed on the inner side wall of the housing (11) , and the U-shaped opening of the U-shaped mounting seat (211) faces the light baffle (22), and the transmitter (212) and the receiver (213) are fixedly installed on the U-shaped mounting Both sides of seat (211) U-shaped opening inside; The adjustment mechanism (3) includes a knob (31), a transmission rod (32), a first bevel gear (33), a second bevel gear (34), a screw (35), a bearing (36), a threaded sleeve (37 ), connecting rod (38), sliding sleeve (39), fixed seat (3a), sliding rod (3b), the transmission rod (32) is movably inserted on the housing (11), and the transmission The top end of the rod (32) is fixedly installed with the knob (31) located on the top surface of the housing (11), and the bottom end of the transmission rod (32) is fixedly installed with the knob located inside the housing (11). The first bevel gear (33), the screw rod (35) is movably installed on the top wall of the housing (11) through the bearing (36), and the second bevel gear (34) is fixedly installed At one end of the screw rod (35), and meshed with the first bevel gear (33), the threaded sleeve (37) is threadedly installed on the screw rod (35), and the slide rod ( 3b) fixedly installed on the top surface of the elastic piece (17) through the fixed seat (3a), the sliding sleeve (39) is slidably fitted on the sliding rod (3b), and the sliding sleeve (39) It is fixedly connected with the threaded sleeve (37) through the connecting rod (38); the bottom end of the pressure rod (45) is connected with a pull rope (48), and the bottom end of the pull rope (48) is connected with the The top surface of the end of the shrapnel (17) is fixedly connected.

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