Engineering construction site safety alarm system

Abstract

The invention relates to the technical field of engineering construction safety, in particular to an engineering construction site safety alarm system which comprises a safety hook, a safety rope, a first connecting arm, a second connecting arm, a telescopic mechanism, a pressure detection module and a controller. The first connecting arm is hinged to the second connecting arm, the first connecting arm is connected with the safety hook, and the second connecting arm is connected with the safety rope. One end of the telescopic mechanism is hinged to the first connecting arm, and the other end is hinged to the second connecting arm. The pressure detection module is used for detecting acting force between the telescopic mechanism and the first connecting arm and / or acting force between the telescopic mechanism and the second connecting arm. And when the acting force detected by the pressure detection module is smaller than the standard acting force at the corresponding extension length, the controller sends out a potential safety hazard alarm prompt. Directional supervision can be carried out on each constructor, and safety guarantee measures of the constructors can be continuously evaluated and monitored in the construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction safety, and in particular to an engineering construction site safety alarm system. Background Art

[0002] During the construction process, construction safety has always been the focus of attention. Since the conditions at the construction site are diverse and usually complex, the management of construction safety mostly relies on the supervision and on-site control of safety officers, which not only brings a huge burden to the work of safety officers, but also easily leads to supervision loopholes.

[0003] In view of this, this application is hereby filed. Summary of the invention

[0004] The purpose of the present invention is to provide a construction site safety alarm system, which can carry out targeted supervision on each construction worker, continuously evaluate and monitor the safety measures of the construction workers during the construction process, and ensure that the safety measures are in a normal state as much as possible, which has positive significance for further reducing the safety risks of construction workers.

[0005] The embodiment of the present invention is achieved as follows: A construction site safety alarm system comprises a safety hook, a safety rope, a first connecting arm, a second connecting arm, a telescopic mechanism, a pressure detection module and a controller.

[0006] One end of the safety rope is connected to the safety hook.

[0007] One end of the first connecting arm is hinged to one end of the second connecting arm, one end of the first connecting arm away from the second connecting arm is connected to the safety hook, one end of the second connecting arm away from the first connecting arm is connected to the safety rope, and the connection point between the second connecting arm and the safety rope is spaced apart from the safety hook.

[0008] One end of the telescopic mechanism is hinged to the first connecting arm, and the other end is hinged to the second connecting arm.

[0009] The hinged ends of the first connecting arm and the second connecting arm are matched with a reset elastic member, and the reset elastic member is used to drive the first connecting arm and the second connecting arm to move closer to each other.

[0010] The pressure detection module is used to detect the force between the telescopic mechanism and the first connecting arm, and / or between the telescopic mechanism and the second connecting arm.

[0011] The telescopic mechanism and the pressure detection module are both electrically connected to the controller, which is used to control the telescopic mechanism to switch from the retracted state to the extended state according to a preset frequency, and use the pressure detection module to collect the extended length-force data. When the force detected by the pressure detection module is less than the standard force at the corresponding extended length, the controller issues a safety hazard alarm.

[0012] Furthermore, one end of the first connecting arm away from the second connecting arm is fixedly connected with a matching ring, and the matching ring is buckled with the safety hook.

[0013] Furthermore, the telescopic mechanism includes: an outer cylinder, a telescopic device, a sliding member and a driving rod.

[0014] Both ends of the outer cylinder are closed structures. The telescopic device is arranged in the middle of the outer cylinder and located at one end of the outer cylinder. The telescopic part of the telescopic device is arranged toward the other end of the outer cylinder.

[0015] The sliding piece is slidably matched in the outer cylinder, and a sliding seal is formed between the sliding piece and the outer cylinder.

[0016] The driving rod is fixedly connected to a side of the sliding member away from the telescopic device. The driving rod extends along the axial direction of the outer cylinder and penetrates the end wall of the outer cylinder. The driving rod and the end wall of the outer cylinder are slidingly sealed.

[0017] One of the end of the outer cylinder away from the driving rod and the end of the driving rod away from the sliding member is hinged to the first connecting arm, and the other is hinged to the second connecting arm.

[0018] A first axial blind hole is provided on one side of the sliding member close to the driving rod, a second axial blind hole is provided on one side of the sliding member close to the telescopic device, and a radial connecting hole is provided on the sliding member for connecting the first axial blind hole with the second axial blind hole.

[0019] The sliding member is also provided with a mounting blind hole, which extends from the side of the sliding member close to the telescopic device along its axial direction toward the side where the driving rod is located, and the mounting blind hole extends to communicate with the radial connecting hole and further extends toward the driving rod.

[0020] An adjusting column is slidably fitted in the installation blind hole, and the outer diameter of the adjusting column is adapted to the hole diameter of the installation blind hole. The adjusting column is provided with a radial conducting hole, and an adjusting elastic member is also provided between the adjusting column and the bottom of the installation blind hole. In a natural state, the adjusting elastic member pushes part of the adjusting column out of the installation blind hole, so that the radial conducting hole moves to the side of the radial connecting hole close to the telescopic device, thereby blocking the radial connecting hole.

[0021] The pressure detection module is installed on the side of the telescopic part close to the sliding part, so that when the telescopic device uses the telescopic part to push the sliding part, the telescopic part can push the adjusting column through the pressure detection module, and then push the adjusting column completely into the installation blind hole, so that the radial conducting hole is matched with the radial connecting hole to make the radial connecting hole conductive.

[0022] The diameter of the pressure detection module is larger than the aperture of the installation blind hole.

[0023] Furthermore, a vent hole is provided at the bottom of the installation blind hole, and the vent hole extends and penetrates to a side surface of the sliding member close to the telescopic device.

[0024] Furthermore, a pressure balance hole is provided on the side wall of the outer cylinder. When the telescopic device is in a retracted state, the pressure balance hole is located on a side of the sliding member close to the telescopic device.

[0025] Furthermore, the controller is also used to determine whether the pressure detection module is in contact with the sliding member based on the pressure data detected by the pressure detection module.

[0026] When the controller determines that the pressure detection module is separated from the sliding member, the controller issues a safety status alarm prompt.

[0027] The beneficial effects of the technical solution of the embodiment of the present invention include: (1) The connection strength between the safety rope and the safety hook can be tested at a preset frequency according to actual needs to ensure that the safety protection facilities are working properly.

[0028] (2) It can promptly issue alarms for safety hooks and safety ropes that have connection strength problems (i.e., safety hazards).

[0029] (3) The structure formed by the first connecting arm, the second connecting arm and the telescopic mechanism can reinforce the connection strength between the safety rope and the safety hook, further improving the overall connection reliability between the safety hook and the safety rope.

[0030] (4) During use, when the connection strength test is not performed, the telescopic mechanism is in a retracted state, and the first connecting arm and the second connecting arm are close to each other, so that the safety rope corresponding to the S segment can be retracted, thereby reducing the falling length of the safety rope, thereby reducing the risk of the safety rope accidentally tripping the construction workers, and further improving the safety of use.

[0031] In general, the construction site safety alarm system provided by the embodiment of the present invention can carry out targeted supervision of each construction worker, and can continuously evaluate and monitor the safety measures of the construction workers during the construction process, ensuring that the safety measures are in a normal state as much as possible, which is of positive significance for further reducing the safety risks of construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 An overall coordination diagram of the construction site safety alarm system provided by an embodiment of the present invention (when the telescopic mechanism is in a retracted state); Figure 2 A schematic diagram of the overall coordination of the construction site safety alarm system provided by an embodiment of the present invention (when the telescopic mechanism is in an extended state); Figure 3 It is a schematic diagram of the structure of the telescopic mechanism (when the telescopic mechanism is in the retracted state); Figure 4 for Figure 3 A schematic diagram of the structure at the middle sliding member; Figure 5 It is a schematic diagram of the structure of the telescopic mechanism (when the telescopic mechanism is in the extended state); Figure 6 It is a schematic diagram of the state when the sliding member of the telescopic mechanism is separated from the pressure detection module; Figure 7 for Figure 6 Schematic diagram of the structure at the middle sliding part.

[0034] Description of reference numerals: Safety hook 100; safety rope 200; first connecting arm 300; matching ring 310; second connecting arm 400; telescopic mechanism 500; outer cylinder 510; air pressure balance hole 511; telescopic device 520; telescopic part 521; sliding part 530; first axial blind hole 531; second axial blind hole 532; radial connecting hole 533; mounting blind hole 534; adjusting column 540; radial guide hole 541; adjusting elastic part 542; driving rod 550; pressure detection module 600. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0039] In addition, the terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Please refer to Figure 1-Figure 2 This embodiment provides a construction site safety alarm system, which includes: a safety hook 100, a safety rope 200, a first connecting arm 300, a second connecting arm 400, a telescopic mechanism 500, a pressure detection module 600 and a controller (not shown in the figure).

[0042] One end of the safety rope 200 is connected to the safety hook 100 .

[0043] One end of the first connecting arm 300 is hinged to one end of the second connecting arm 400, the end of the first connecting arm 300 away from the second connecting arm 400 is connected to the safety hook 100, and the end of the second connecting arm 400 away from the first connecting arm 300 is connected to the safety rope 200, and the connection point between the second connecting arm 400 and the safety rope 200 is spaced apart from the safety hook 100.

[0044] One end of the telescopic mechanism 500 is hinged to the first connecting arm 300 , and the other end is hinged to the second connecting arm 400 .

[0045] The hinged ends of the first connecting arm 300 and the second connecting arm 400 are equipped with a resetting elastic member (not shown in the figure), and the resetting elastic member is used to drive the first connecting arm 300 and the second connecting arm 400 to move closer to each other.

[0046] The pressure detection module 600 is used to detect the force between the telescopic mechanism 500 and the first connecting arm 300 and / or between the telescopic mechanism 500 and the second connecting arm 400 .

[0047] The telescopic mechanism 500 and the pressure detection module 600 are both electrically connected to the controller.

[0048] In a normal state, the telescopic mechanism 500 is in a retracted state (i.e., a contracted state), the length of the telescopic mechanism 500 is in a shortest state, the distance between the first connecting arm 300 and the second connecting arm 400 is the smallest, and the safety rope 200 is between the safety hook 100 and the second connecting arm 400 (e.g., Figure 1 (as shown in segment S in the figure) is in a relaxed state.

[0049] The controller is used to control the telescopic mechanism 500 to switch from a retracted state to an extended state according to a preset frequency (the specific frequency can be flexibly set according to actual needs). During the extension of the telescopic mechanism 500, the pressure detection module 600 is used to collect the extension length-force data, that is, the magnitude of the force detected by the pressure detection module 600 corresponding to the telescopic mechanism 500 under different extension lengths is collected.

[0050] As the extension length of the telescopic mechanism 500 increases, the safety rope 200 of the S section is gradually tightened. During this process, the force detected by the pressure detection module 600 gradually increases. When the connection strength between the safety hook 100 and the safety rope 200 meets the requirements, we use the force detected by the pressure detection module 600 at different extension lengths as the standard force.

[0051] If the following situation occurs: during the extension of the telescopic mechanism 500, the force detected by the pressure detection module 600 is less than the standard force at the corresponding extension length, then it means that there is a problem with the connection strength between the safety rope 200 and the safety hook 100, and the controller issues a safety hazard alarm.

[0052] In order to improve the accuracy of the alarm, the connection parts of each safety rope 200 and the safety hook 100 can also be identified, and the corresponding pressure detection modules 600 can be matched one by one. In this way, the specific location where the connection strength problem occurs can be determined based on the pressure detection module 600 that shows that "the force detected by the pressure detection module 600 is less than the standard force at the corresponding extended length".

[0053] This design has at least the following beneficial effects: (1) the connection strength between the safety rope 200 and the safety hook 100 can be tested at a preset frequency according to actual needs to ensure the normal operation of the safety protection facilities; (2) the safety hook 100 and the safety rope 200 with connection strength problems (i.e., safety hazards) can be promptly alarmed; (3) the structure formed by the first connecting arm 300, the second connecting arm 400 and the telescopic mechanism 500 can reinforce the connection strength between the safety rope 200 and the safety hook 100, further improving the overall connection reliability between the safety hook 100 and the safety rope 200; (4) during use, when the connection strength test is not performed, the telescopic mechanism 500 is in a retracted state, the first connecting arm 300 and the second connecting arm 400 are close to each other, and the safety rope 200 corresponding to the S segment can be retracted, thereby reducing the falling length of the safety rope 200, thereby reducing the risk of the safety rope 200 accidentally tripping the construction workers, and further improving the safety of use.

[0054] In general, the construction site safety alarm system provided in this embodiment can carry out targeted supervision of each construction worker, and can continuously evaluate and monitor the safety measures of the construction workers during the construction process, ensuring that the safety measures are in a normal state as much as possible, which is of positive significance for further reducing the safety risks of construction workers.

[0055] In this embodiment, the end of the first connecting arm 300 away from the second connecting arm 400 is fixedly connected with a matching ring 310, and the matching ring 310 is buckled with the safety hook 100. The end of the second connecting arm 400 away from the first connecting arm 300 is fixedly connected with the safety rope 200.

[0056] Further, please combine Figure 1-Figure 7 The telescopic mechanism 500 includes: an outer cylinder 510, a telescopic device 520, a sliding member 530 and a driving rod 550.

[0057] Both ends of the outer cylinder 510 are closed structures, the telescopic device 520 is arranged in the outer cylinder 510 and located at one end of the outer cylinder 510, and the telescopic part 521 of the telescopic device 520 is arranged toward the other end of the outer cylinder 510. The telescopic device 520 can be a cylinder or a linear drive, but is not limited thereto.

[0058] The sliding member 530 is slidably fitted in the outer cylinder 510 , and a sliding seal is formed between the sliding member 530 and the outer cylinder 510 .

[0059] The driving rod 550 is fixedly connected to the side of the sliding member 530 away from the telescopic device 520 . The driving rod 550 extends along the axial direction of the outer cylinder 510 and passes through the end wall of the outer cylinder 510 . The driving rod 550 and the end wall of the outer cylinder 510 are slidingly sealed.

[0060] One of the end of the outer cylinder 510 away from the driving rod 550 and the end of the driving rod 550 away from the sliding member 530 is hinged to the first connecting arm 300, and the other is hinged to the second connecting arm 400. Optionally, in this embodiment, the telescopic device 520 is located at the end of the outer cylinder 510 close to the first connecting arm 300, the sliding member 530 is located at the side of the telescopic device 520 close to the second connecting arm 400, the driving rod 550, the sliding member 530 and the outer cylinder 510 are coaxially arranged, the end of the outer cylinder 510 away from the driving rod 550 is hinged to the first connecting arm 300, and the end of the driving rod 550 away from the telescopic device 520 is hinged to the second connecting arm 400.

[0061] A first axial blind hole 531 is provided on the side of the sliding member 530 close to the driving rod 550. The first axial blind hole 531 is formed by extending the surface of the sliding member 530 close to the driving rod 550 along the axial direction of the outer cylinder 510. A second axial blind hole 532 is provided on the side of the sliding member 530 close to the telescopic device 520. The second axial blind hole 532 is formed by extending the surface of the sliding member 530 close to the telescopic device 520 along the axial direction of the outer cylinder 510. The sliding member 530 is also provided with a radial communication hole 533 for connecting the first axial blind hole 531 and the second axial blind hole 532. The radial communication hole 533 extends in the radial direction of the outer cylinder 510 and is located inside the sliding member 530.

[0062] The sliding member 530 is also provided with a mounting blind hole 534, which is formed by extending a side surface of the sliding member 530 close to the telescopic device 520 along the axial direction of the outer cylinder 510 toward the inside of the sliding member 530 (i.e., toward the side where the driving rod 550 is located). During the extension process, the mounting blind hole 534 is connected with the radial connecting hole 533 and further extends in the direction where the driving rod 550 is located.

[0063] An adjusting column 540 is slidably fitted in the installation blind hole 534, and the outer diameter of the adjusting column 540 is adapted to the aperture of the installation blind hole 534. The adjusting column 540 is provided with a radial through hole 541, and an adjusting elastic member 542 is further provided between the adjusting column 540 and the bottom of the installation blind hole 534. In a natural state, the adjusting elastic member 542 pushes a part of the adjusting column 540 out of the installation blind hole 534, at which time, the radial through hole 541 of the adjusting column 540 moves to the side of the radial communication hole 533 close to the telescopic device 520, thereby making the radial through hole 541 and the radial communication hole 533 staggered with each other, and the radial communication hole 533 is blocked by the adjusting column 540.

[0064] The pressure detection module 600 is installed on a side of the telescopic part 521 of the telescopic device 520 close to the sliding member 530 , that is, installed on the end of the telescopic part 521 of the telescopic device 520 . The diameter of the pressure detection module 600 is larger than the aperture of the installation blind hole 534 .

[0065] When the connection strength test is not performed, the telescopic device 520 is in a retracted state, in which the sliding member 530 is in contact with the pressure detection module 600, that is, the sliding member 530 is indirectly in contact with the telescopic portion 521 of the telescopic device 520 through the pressure detection module 600, and the pressure detection module 600 pushes the adjustment column 540 completely into the installation blind hole 534 and in contact with the surface of the sliding member 530. At this time, the radial through hole 541 of the adjustment column 540 is matched to the radial communication hole 533 so that the radial communication hole 533 is in a conducting state, that is, the gas in the radial communication hole 533 can pass through the adjustment column 540 through the radial through hole 541.

[0066] When the connection strength test is performed, the telescopic device 520 begins to extend, and the telescopic portion 521 pushes the sliding member 530 through the pressure detection module 600. During this process, the adjustment column 540 is always completely located in the installation blind hole 534, that is, the radial connecting hole 533 is always in a conducting state. When the sliding member 530 moves toward the end of the outer cylinder 510 away from the telescopic device 520, the air on the side of the sliding member 530 away from the telescopic device 520 passes through the first axial blind hole 531, the radial connecting hole 533 and the second axial blind hole 532 in sequence, and enters the side of the sliding member 530 close to the telescopic device 520, so that the sliding member 530 can move smoothly along the outer cylinder 510, so that the telescopic mechanism 500 can be smoothly extended as a whole.

[0067] When the telescopic device 520 begins to retract and reset after the connection strength test is completed, the telescopic part 521 and the pressure detection module 600 gradually move toward the end where the telescopic device 520 is located. Under the action of the reset elastic member, the first connecting arm 300 and the second connecting arm 400 have a tendency to move closer to each other, which can prompt the driving rod 550 to push the sliding member 530 to reset synchronously and keep the sliding member 530 in contact with the pressure detection module 600 during the reset process (the retraction speed of the telescopic part 521 of the telescopic device 520 can be set to be less than the speed at which the first connecting arm 300 and the second connecting arm 400 move closer to each other). In this way, during the resetting process, the adjusting column 540 is also always completely located in the mounting blind hole 534, and the radial connecting hole 533 is also always in a conducting state. The air on the side of the sliding member 530 close to the telescopic device 520 can enter the side of the sliding member 530 away from the telescopic device 520 through the second axial blind hole 532, the radial connecting hole 533 and the first axial blind hole 531 in sequence, thereby allowing the sliding member 530 to be successfully reset.

[0068] When the construction workers are at risk of falling, the safety measures formed by the safety rope 200 and the safety hook 100 prevent the construction workers from falling, thereby ensuring the safety of the construction workers. At this time, the safety rope 200 is tightened due to the force from the construction workers, so that the safety rope 200 in the S section is stretched out by the tension applied. At the same time, the first connecting arm 300 and the second connecting arm 400 are also pulled apart, and the angle (distance) between the first connecting arm 300 and the second connecting arm 400 increases. The second connecting arm 400 applies tension to the sliding member 530 through the driving rod 550, so that the sliding member 530 is separated from the pressure detection module 600. Once the sliding member 530 is separated from the pressure detection module 600, the adjusting column 540 is partially pushed out of the mounting blind hole 534 by the adjusting elastic member 542, thereby blocking the radial connecting hole 533. In this way, the air on the side of the sliding member 530 away from the telescopic device 520 cannot enter the side of the sliding member 530 close to the telescopic device 520, and the movement of the sliding member 530 will be hindered, thereby smoothly buffering the force from the construction personnel and alleviating the discomfort caused to the construction personnel by the pulling force of the safety rope 200.

[0069] At the same time, when the construction workers are at risk of falling, the sliding member 530 and the pressure detection module 600 will separate, which will cause the pressure detected by the pressure detection module 600 to change. Conversely, it is possible to determine whether the construction workers have been at risk of falling by monitoring whether the pressure detected by the pressure detection module 600 changes when the connection strength test is not performed. That is, the controller can also be used to determine whether the pressure detection module 600 is in contact with the sliding member 530 based on the pressure data detected by the pressure detection module 600. When the controller determines that the pressure detection module 600 is separated from the sliding member 530, the controller issues a safety status alarm.

[0070] When a safety situation alarm appears, it means that the corresponding construction worker is at risk of falling. This allows the safety status of the construction workers to be monitored proactively, making it easy to promptly identify construction workers who have experienced safety risks, thereby helping to optimize and improve the corresponding construction safety management work in a targeted manner.

[0071] Optionally, a vent hole (not shown) is opened at the bottom of the mounting blind hole 534 , and the vent hole extends and penetrates to a side surface of the sliding member 530 close to the telescopic device 520 , so as to facilitate smooth movement of the adjustment column 540 .

[0072] Optionally, a pressure balance hole 511 is provided on the side wall of the outer cylinder 510. When the telescopic device 520 is in the retracted state, the sliding member 530 fits with the pressure detection module 600. At this time, the pressure balance hole 511 is located on the side of the sliding member 530 close to the telescopic device 520. The pressure balance hole 511 can help balance the air pressure on the side of the sliding member 530 close to the telescopic device 520, so that the movement of the sliding member 530 is smoother.

[0073] To sum up, the construction site safety alarm system provided by the embodiment of the present invention can carry out targeted supervision of each construction worker, and can continuously evaluate and monitor the safety measures of the construction workers during the construction process, ensuring that the safety measures are in a normal state as much as possible, which is of positive significance for further reducing the safety risks of construction workers.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction site safety alarm system, characterized in that: include: Safety hook, safety rope, first connecting arm, second connecting arm, telescopic mechanism, pressure detection module and controller; One end of the safety rope is connected to the safety hook; One end of the first connecting arm is hinged to one end of the second connecting arm, one end of the first connecting arm away from the second connecting arm is connected to the safety hook, one end of the second connecting arm away from the first connecting arm is connected to the safety rope, and the connection point between the second connecting arm and the safety rope is spaced apart from the safety hook; One end of the telescopic mechanism is hinged to the first connecting arm, and the other end is hinged to the second connecting arm; The hinged ends of the first connecting arm and the second connecting arm are equipped with a reset elastic member, and the reset elastic member is used to drive the first connecting arm and the second connecting arm to move closer to each other; The pressure detection module is used to detect the force between the telescopic mechanism and the first connecting arm, and / or between the telescopic mechanism and the second connecting arm; The telescopic mechanism and the pressure detection module are both electrically connected to the controller. The controller is used to control the telescopic mechanism to switch from a retracted state to an extended state according to a preset frequency, and use the pressure detection module to collect extended length-force data; when the force detected by the pressure detection module is less than the standard force at the corresponding extended length, the controller issues a safety hazard alarm.

2. The construction site safety alarm system according to claim 1 is characterized in that: One end of the first connecting arm away from the second connecting arm is fixedly connected with a matching ring, and the matching ring is buckled with the safety hook.

3. The construction site safety alarm system according to claim 1 is characterized in that: The telescopic mechanism comprises: an outer cylinder, a telescopic device, a sliding member and a driving rod; Both ends of the outer cylinder are closed structures, the telescopic device is arranged in the middle of the outer cylinder and located at one end of the outer cylinder, and the telescopic part of the telescopic device is arranged toward the other end of the outer cylinder; The sliding member is slidably fitted in the outer cylinder, and a sliding seal is provided between the sliding member and the outer cylinder; The driving rod is fixedly connected to a side of the sliding member away from the telescopic device, the driving rod extends along the axial direction of the outer cylinder and penetrates the end wall of the outer cylinder, and a sliding seal is formed between the driving rod and the end wall of the outer cylinder; One of the end of the outer cylinder away from the driving rod and the end of the driving rod away from the sliding member is hinged to the first connecting arm, and the other is hinged to the second connecting arm; A first axial blind hole is formed on a side of the sliding member close to the driving rod, a second axial blind hole is formed on a side of the sliding member close to the telescopic device, and a radial connecting hole is formed on the sliding member for connecting the first axial blind hole with the second axial blind hole; The sliding member is further provided with a mounting blind hole, the mounting blind hole extending from a side of the sliding member close to the telescopic device along its axial direction toward a side where the driving rod is located, the mounting blind hole extending to communicate with the radial connecting hole and further extending toward the driving rod; An adjusting column is slidably fitted in the mounting blind hole, and the outer diameter of the adjusting column is adapted to the hole diameter of the mounting blind hole; a radial conducting hole is provided in the adjusting column, and an adjusting elastic member is further provided between the adjusting column and the bottom of the mounting blind hole, and in a natural state, the adjusting elastic member partially pushes the adjusting column out of the mounting blind hole, so that the radial conducting hole moves to the side of the radial communicating hole close to the telescopic device, thereby blocking the radial communicating hole; The pressure detection module is installed on a side of the telescopic part close to the sliding member, so that when the telescopic device uses the telescopic part to push the sliding member, the telescopic part can push the adjustment column through the pressure detection module, and then push the adjustment column completely into the mounting blind hole, so that the radial conducting hole is matched with the radial communicating hole to make the radial communicating hole conductive; Wherein, the diameter of the pressure detection module is larger than the aperture of the mounting blind hole.

4. The construction site safety alarm system according to claim 3 is characterized in that: A vent hole is provided at the bottom of the installation blind hole, and the vent hole extends and penetrates to a side surface of the sliding member close to the telescopic device.

5. The construction site safety alarm system according to claim 3 is characterized in that: A gas pressure balance hole is provided on the side wall of the outer cylinder. When the telescopic device is in a retracted state, the gas pressure balance hole is located on a side of the sliding member close to the telescopic device.

6. The construction site safety alarm system according to claim 3 is characterized in that: The controller is also used to determine whether the pressure detection module is in contact with the sliding member according to the pressure data detected by the pressure detection module; When the controller determines that the pressure detection module is separated from the sliding member, the controller issues a safety status alarm.

Images