Self-elevating tower crane safety monitoring device

Abstract

The present invention relates to a tower crane safety device, and specifically to a self-elevating tower crane safety monitoring device, which is used to solve the shortcomings of existing early warning devices that have a single function and cannot provide early warnings for other problems that may occur when the self-elevating tower crane is used. The self-elevating tower crane safety monitoring device is arranged at the connection between two adjacent standard sections to be monitored, specifically at the connection between the lower crossbeam of the upper standard section and the upper crossbeam of the lower standard section, and the lower crossbeam and the upper crossbeam are both angle steel or square tube; an alarm device with contacts is arranged on a detachable mounting bracket, and a U-shaped bracket is used as a transition device, and the early warning device cooperates with the U-shaped bracket to provide early warning of the increase in the gap at the connection of the standard sections; the monitoring device has a wider early warning range and higher sensitivity than the existing tower crane safety monitoring device.

Description

Technical Field

[0001] The invention relates to a tower crane safety device, in particular to a self-elevating tower crane safety monitoring device. Background Art

[0002] Self-elevating tower cranes are the main mechanical equipment used in high-rise building construction. They are composed of multiple standard sections connected in sequence. Each standard section is made by welding, and adjacent standard sections are fixed with multiple bolts. Due to the high frequency of use of self-elevating tower cranes, there are often problems such as loosening of the connecting bolts of the tower crane standard sections, tensile deformation of the connecting bolts, desoldering or deformation of the bolt sleeves welded on the standard sections, and deformation and desoldering of the adjacent standard section profiles. There are many accidents caused by this.

[0003] Reference Figures 1 to 3 Chinese patent CN207909315U discloses an early warning device for preventing nuts from loosening. The early warning device can avoid accidents by predicting in advance whether the fastening nuts are loose. The early warning device is arranged on the outer layer of the nut to be protected, and its shape and size are similar to those of ordinary nuts. A contact (01) is arranged on the front of the early warning device, and the contact (01) is connected to the shell structure through a spring (02), and a conductive point (03) is arranged at the rear of the contact (01); a light strip (04), a loudspeaker (05), a power supply and a switch (06) are arranged on the back of the early warning device; a contact piece (07) is arranged inside the early warning device, and the contact piece (07) is a conductor; when the contact (01) is pressed and moves backward, the conductive point (03) at the rear of the contact (01) contacts the contact piece (07), so that the circuit arranged inside the early warning device is connected, and the light strip (04) and the loudspeaker (05) are activated to alarm.

[0004] Anhui Tumu Technology Co., Ltd. sells an intelligent early warning nut for tower cranes. Like conventional nuts, it has its own threads and is rotatably installed behind the fastening nut. The early warning nut includes a transparent shell with protruding contacts. A pressure sensor corresponding to the contacts and an alarm light are provided inside the shell. When the fastening nut loosens and the thread is withdrawn, pressure will be applied to the contacts. After the pressure sensor receives the pressure, the alarm light will emit a prompt light.

[0005] Since the working principle of the above-mentioned prior art is to issue an early warning when pressure is applied to the contacts of the early warning device or the early warning nut when the fastening nut is loose, it is impossible to issue an early warning for other problems that may occur when the self-elevating tower crane is in use except for the loosening of the fastening nut. Summary of the invention

[0006] The purpose of the present invention is to provide a self-elevating tower crane safety monitoring device to solve the shortcomings of the existing tower crane safety monitoring device, which has a single function and cannot provide early warning for other problems other than loosening of fastening nuts that may occur when the self-elevating tower crane is in use.

[0007] In order to solve the deficiencies of the above-mentioned prior art, the present invention provides the following technical solutions:

[0008] A self-elevating tower crane safety monitoring device is arranged at the connection of two adjacent standard sections to be monitored, specifically at the connection of the lower beam of the upper standard section and the upper beam of the lower standard section, wherein the lower beam and the upper beam are both angle steels; the lower beam comprises a horizontally arranged lower beam transverse surface and a vertically arranged lower beam facade, and the upper beam comprises a horizontally arranged upper beam transverse surface and a vertically arranged upper beam facade;

[0009] Its special features are: it includes an L-shaped clamp, a mounting bracket, a U-shaped bracket, mounting bolts and an early warning device;

[0010] The upper end horizontal plate of the L-shaped clamping plate contacts the upper end of the mounting bracket to form an upper end U-shaped opening opening vertically downward, the upper end U-shaped opening is adapted to the thickness of the lower beam facade, and at least one fixing bolt is provided at the tail of the upper end U-shaped opening, and at least one fixing bolt passes through both sides of the upper end U-shaped opening to clamp the lower beam facade in the upper end U-shaped opening;

[0011] The mounting bracket is also provided with a lower U-shaped opening opening vertically upward, the lower U-shaped opening is adapted to the thickness of the upper beam facade, and the upper beam facade is located in the lower U-shaped opening; one side of the lower U-shaped opening is provided with a support member located at the lower part of the upper beam transverse surface and parallel to the upper beam transverse surface;

[0012] The horizontal plate of the U-shaped bracket is located at the lower part of the support member, and the opening faces upward, and a gap is maintained between the top of the two side plates of the U-shaped bracket and the horizontal surface of the upper crossbeam;

[0013] The mounting bolt is fixedly arranged on the support member, and its tail portion passes through the U-shaped bracket and is fixedly connected to the warning device through a thread, and the U-shaped bracket can move along the mounting bolt relative to the mounting bolt;

[0014] A plurality of contact points on the upper surface of the early warning device are in contact with the bottom surface of the horizontal plate of the U-shaped bracket.

[0015] Furthermore, a gap is maintained between the upper crossbeam facade and the bottom of the U-shaped opening at the lower end, and the gap between the top of the two side panels of the U-shaped bracket and the upper crossbeam cross surface is smaller than the gap between the upper crossbeam facade and the bottom of the U-shaped opening at the lower end, thereby improving the sensitivity of the early warning device.

[0016] Furthermore, a through hole with a smooth inner wall is provided on the transverse plate of the U-shaped bracket, and the tail end of the mounting bolt passes through the through hole on the U-shaped bracket and is fixedly connected to the early warning device by a thread, so as to realize relative movement between the mounting bolt and the U-shaped bracket; the support member is a double-layer structure, including an upper leg and a lower leg, and the mounting bolt is fixedly arranged on the lower leg, so as to improve the stability of the mounting bracket.

[0017] At the same time, the present invention also provides another self-elevating tower crane safety monitoring device, which is arranged at the connection between two adjacent standard sections to be monitored, specifically at the connection between the lower crossbeam of the upper standard section and the upper crossbeam of the lower standard section, and the lower crossbeam and the upper crossbeam are both square tubes; the special feature of the device is that it includes a mounting bracket, a U-shaped bracket, mounting bolts and an early warning device;

[0018] The mounting bracket is a square frame structure surrounding the lower crossbeam and the upper crossbeam, one corner of the mounting bracket is a hinged structure, and another corner of the mounting bracket is a detachable connection structure;

[0019] The horizontal plate of the U-shaped bracket is located at the lower part of the bottom surface of the mounting bracket, and the opening faces upward, and the tops of the two side plates of the U-shaped bracket maintain a gap with the lower surface of the upper crossbeam;

[0020] The mounting bolt is fixedly arranged at the bottom of the mounting bracket, and its tail portion passes through the horizontal plate of the U-shaped bracket and is threadedly connected with the warning device, and the U-shaped bracket can move along the mounting bolt relative to the mounting bolt;

[0021] A plurality of contact points on the upper surface of the early warning device are in contact with the horizontal plate of the U-shaped bracket.

[0022] Furthermore, a gap is maintained between the upper crossbeam and the bottom of the mounting bracket; the gap between the top of the two side plates of the U-shaped bracket and the lower surface of the upper crossbeam is smaller than the gap between the upper crossbeam and the bottom of the mounting bracket, thereby improving the sensitivity of the early warning device.

[0023] Further, the mounting bracket includes two L-shaped brackets hinged to each other, and the non-hinged ends of the two L-shaped brackets are fixedly connected by bolts; or, the mounting bracket includes a U-shaped frame and a cover plate hinged thereto, and the U-shaped frame and the non-hinged ends of the cover plate are fixedly connected by bolts.

[0024] Furthermore, a screw is provided between the lower cross beam and the upper cross beam, the screw passes through both sides of the mounting bracket, and is fixed to the mounting bracket by nuts, so as to enhance the stability of the safety bracket and improve the accuracy of the warning.

[0025] Furthermore, a through hole with a smooth inner wall is provided on the transverse plate of the U-shaped bracket, and the tail of the mounting bolt passes through the through hole on the U-shaped bracket and is threadedly connected to the early warning device to achieve relative movement between the mounting bolt and the U-shaped bracket.

[0026] The present invention provides a self-elevating tower crane safety monitoring method, which is special in that it comprises the following steps:

[0027] Step (1): installing a bracket between the upper beam and the lower beam of two adjacent standard sections to be monitored; the bracket and the lower beam are relatively fixed, and a first gap is maintained between the bracket and the bottom of the upper beam;

[0028] Step (2): fixing an alarm device with contacts at the bottom of the bracket or at an area extending outside the bottom of the bracket;

[0029] Step (3): placing a transition device that can move up and down above the contact of the alarm device; maintaining a second gap between the transition device and the bottom of the upper crossbeam above it; requiring the first gap to be larger than the second gap;

[0030] Step (4): When the distance between two adjacent standard sections to be detected increases and exceeds the second gap, the bottom of the upper beam pushes the transition device downward, triggering the contact of the alarm device, and the alarm device generates an alarm signal.

[0031] Furthermore, the two adjacent standard sections to be detected are located above the attachment rod of the tower crane; and the alarm device is provided with a reset button for shutting down the early warning device.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The present invention is provided with an alarm device with contacts on a detachable mounting bracket, and a U-shaped bracket is used as a transition device. The alarm device cooperates with the U-shaped bracket to give an alarm for the increase in the gap at the connection of the standard section. Compared with the alarm scheme in which the alarm device is installed after the fastening nut, the present invention can effectively give an alarm for a variety of problems such as loosening of connecting bolts of adjacent standard sections, tensile deformation of connecting bolts, desoldering or deformation of bolt sleeves welded on the standard section, and deformation and desoldering of adjacent standard section profiles, and the alarm range is wider.

[0034] (2) The present invention uses a detachable mounting bracket between the upper beam and the lower beam of two adjacent standard sections to be monitored to fix the alarm device and the U-shaped bracket, so that the present invention can be applied to upper beams and lower beams of different models and is easy to install and disassemble.

[0035] (3) The present invention sets a first gap between the bracket and the bottom of the upper beam, and sets a second gap between the transition device and the bottom of the upper beam above it, and the first gap is larger than the second gap, so that when the gap between the lower beam and the upper beam increases, the transition device can trigger the contacts of the alarm device in time, thereby improving the sensitivity of the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front structural schematic diagram of an existing early warning device for preventing nut loosening;

[0037] Figure 2 for Figure 1 Schematic diagram of the back structure;

[0038] Figure 3 for Figure 1 Schematic diagram of the cross-section structure.

[0039] Figures 1 to 3 The markings are as follows: 01-contact, 02-spring, 03-conductive point, 04-light strip, 05-speaker, 06-power supply and switch, 07-contact piece.

[0040] Figure 4 It is a schematic cross-sectional view of an embodiment of the present invention;

[0041] Figure 5 for Figure 4 A left-side structural schematic diagram of an embodiment;

[0042] Figure 6 It is a cross-sectional structural schematic diagram of another embodiment of the present invention;

[0043] Figure 7 for Figure 6 A left-side structural schematic diagram of an embodiment.

[0044] Figures 4 to 7 The markings are as follows: 1-lower crossbeam, 11-cross surface of lower crossbeam, 12-vertical surface of lower crossbeam; 2-upper crossbeam, 21-cross surface of upper crossbeam, 22-vertical surface of upper crossbeam; 3-mounting bracket, 31-Upper U-shaped opening, 32-Lower U-shaped opening, 33-support, 34-upper leg, 35-lower leg; 4-U-shaped bracket; 5-mounting bolt; 6-early warning device, 61-contact; 7-fixing bolt; 8-L-shaped clamp. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] Embodiment 1

[0047] Reference Figure 4 , Figure 5 A self-elevating tower crane safety monitoring device is arranged at the connection of two adjacent standard sections to be monitored, specifically at the connection of the lower beam 1 of the upper standard section and the upper beam 2 of the lower standard section, the lower beam 1 and the upper beam 2 are both angle steels; the lower beam 1 includes a horizontally arranged lower beam cross surface 11 and a vertically arranged lower beam facade 12, and the upper beam 2 includes a horizontally arranged upper beam cross surface 21 and a vertically arranged upper beam facade 22.

[0048] The safety monitoring device for a self-elevating tower crane comprises an L-shaped clamping plate 8, a mounting bracket 3, a U-shaped bracket 4, a mounting bolt 5 and an early warning device 6; the upper end horizontal plate of the L-shaped clamping plate 8 contacts the upper end of the mounting bracket 3 to form an upper end U-shaped opening opening vertically downward, the upper end U-shaped opening 31 is adapted to the thickness of the lower beam facade 12, and two fixing bolts 7 are arranged at the tail of the upper end U-shaped opening 31, and the two fixing bolts 7 pass through the two sides of the upper end U-shaped opening 31 to clamp the lower beam facade 12 in the upper end U-shaped opening 31; a lower end U-shaped opening 32 opening vertically upward is also arranged on the mounting bracket 3, the lower end U-shaped opening 32 is adapted to the thickness of the upper beam facade 22, the upper beam facade 22 is located in the lower end U-shaped opening 32, and a gap is maintained with the bottom of the lower end U-shaped opening 32.

[0049] A support member 33 is provided on one side of the lower U-shaped opening 32, which is located at the lower part of the upper beam cross surface 21 and parallel to the upper beam cross surface 21. The support member 33 is a double-layer structure, including an upper leg 34 and a lower leg 35; the cross plate of the U-shaped bracket 4 is located at the lower part of the support member 33, and the opening faces upward, and the tops of the two side plates of the U-shaped bracket 4 maintain a gap with the upper beam cross surface 21, and the cross plate of the U-shaped bracket 4 is provided with a through hole with a smooth inner wall; the mounting bolt 5 is fixedly set on the lower leg 35, and its tail passes through the through hole on the U-shaped bracket 4 and is threadedly connected to the early warning device 6, and the U-shaped bracket 4 can move along the mounting bolt 5 relative to the mounting bolt 5; multiple contacts 61 on the upper surface of the early warning device 6 are in contact with the bottom surface of the cross plate of the U-shaped bracket 4.

[0050] During installation, the mounting bracket 3 and the L-shaped clamping plate 8 are first sleeved outside the lower beam elevation 12 and the upper beam elevation 22, and the mounting bracket 3 and the L-shaped clamping plate 8 are fixedly connected by two fixing bolts 7, and then the mounting bolt 5 is fixedly set on the lower leg 35, and its tail passes through the through hole on the U-shaped bracket 4 and is threadedly connected to the warning device 6, ensuring that the gap between the top of the two side plates of the U-shaped bracket 4 and the bottom of the upper beam horizontal surface 21 is smaller than the gap between the upper beam elevation 22 and the bottom of the lower U-shaped opening 32. When disassembling, the order is opposite to that of installation.

[0051] When the connecting bolts of two adjacent standard sections to be monitored are loose, the connecting bolts are stretched and deformed, the bolt sleeves are desoldered or deformed, and the standard section profiles are deformed or desoldered, the gap between the lower beam cross surface 11 of the upper standard section and the upper beam cross surface 21 of the lower standard section will increase, and the U-shaped bracket 4 will be forced to move downward. Similarly, the force on the bottom of the lower U-shaped opening 32 will drive the lower leg 35 and the early warning device 6 connected to the lower leg 35 to move downward. Since the distance between the upper beam facade 22 and the bottom of the lower U-shaped opening 32 is greater than the distance between the bottom of the upper beam cross surface 21 and the two side plates of the U-shaped bracket 4, the U-shaped bracket 4 moves downward relative to the mounting bolts 5, exerting pressure on the multiple contacts 61 on the upper surface of the early warning device 6, thereby sending out an alarm signal.

[0052] Embodiment 2

[0053] Reference Figure 6 and Figure 7 A self-elevating tower crane safety monitoring device is arranged at the connection between two adjacent standard sections to be monitored, specifically at the connection between the lower crossbeam 1 of the upper standard section and the upper crossbeam 2 of the lower standard section, and both the lower crossbeam 1 and the upper crossbeam 2 are square tubes.

[0054] The self-elevating tower crane safety monitoring device includes a mounting bracket 3, a U-shaped bracket 4, a mounting bolt 5 and an early warning device 6; the mounting bracket 3 is a square frame structure surrounding a lower crossbeam 1 and an upper crossbeam 2, including two L-shaped brackets hinged to each other by hinges, the two L-shaped brackets are welded and fixed to the hinges, and the non-hinged ends of the two L-shaped brackets are fixedly connected by bolts; a screw rod 9 is arranged between the lower crossbeam 1 and the upper crossbeam 2, the screw rod 9 passes through both sides of the mounting bracket, and is fixed to the mounting bracket 3 by nuts.

[0055] The horizontal plate of the U-shaped bracket 4 is located at the lower part of the bottom surface of the mounting bracket 3, and the opening faces upward. The tops of the two side plates of the U-shaped bracket 4 maintain a gap with the lower surface of the upper crossbeam 2, and a through hole with a smooth inner wall is provided on the horizontal plate of the U-shaped bracket 4; the mounting bolt 5 is fixedly set at the bottom of the mounting bracket 3, and its tail passes through the through hole on the U-shaped bracket 4 and is threadedly connected with the early warning device 6. The U-shaped bracket 4 can move along the mounting bolt 5 relative to the mounting bolt 5, and the multiple contacts 61 on the upper surface of the early warning device 6 are in contact with the bottom surface of the horizontal plate of the U-shaped bracket 4.

[0056] During installation, first open the two mutually hinged L-shaped brackets, put them around the outer periphery of the lower crossbeam 1 and the upper crossbeam 2, and fix the two L-shaped brackets at the unhinged ends with bolts, then pass the screws 9 through both sides of the mounting bracket 3 to tighten the mounting bracket 3; then fix the mounting bolts 5 at the bottom of the mounting bracket, and the tail of the mounting bolts 5 passes through the through holes on the horizontal plate of the U-shaped bracket 4 and is threadedly connected with the warning device 6 to ensure that the gap between the top of the two side plates of the U-shaped bracket 4 and the lower surface of the upper crossbeam 2 is smaller than the gap between the bottom surface of the upper crossbeam 2 and the mounting bolts 5. When disassembling, the order is opposite to that of installation.

[0057] When the connecting bolts of two adjacent standard sections to be monitored are loose, the connecting bolts are stretched and deformed, the bolt sleeves are desoldered or deformed, and the standard section profiles are deformed or desoldered, the gap between the lower beam 1 of the upper standard section and the upper beam 2 of the lower standard section will increase, and the U-shaped bracket 4 will be forced to move downward. Similarly, the force on the bottom of the mounting bracket 3 will drive the early warning device 6 to move downward. Since the gap between the top of the two side plates of the U-shaped bracket 4 and the lower surface of the upper beam 2 is smaller than the gap between the bottom surface of the upper beam 2 and the mounting bolts 5, the U-shaped bracket 4 moves downward relative to the mounting bolts 5, exerting pressure on the multiple contacts 61 on the upper surface of the early warning device 6, thereby sending out an alarm signal.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. For ordinary professional and technical personnel in the field, the specific technical solutions recorded in the aforementioned embodiments can be modified, or some of the technical features therein can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions protected by the present invention.

Claims

1. A self-elevating tower crane safety monitoring device, arranged at the connection of two adjacent standard sections to be monitored, specifically at the connection of a lower crossbeam (1) of an upper standard section and an upper crossbeam (2) of a lower standard section, wherein both the lower crossbeam (1) and the upper crossbeam (2) are angle steels; the lower crossbeam (1) comprises a horizontally arranged lower crossbeam transverse surface (11) and a vertically arranged lower crossbeam facade (12), and the upper crossbeam (2) comprises a horizontally arranged upper crossbeam transverse surface (21) and a vertically arranged upper crossbeam facade (22); the device is characterized in that: It comprises an L-shaped clamping plate (8), a mounting bracket (3), a U-shaped bracket (4), a mounting bolt (5) and an early warning device (6); The upper end horizontal plate of the L-shaped clamping plate (8) contacts the upper end of the mounting bracket (3), forming an upper end U-shaped opening (31) opening vertically downward, the upper end U-shaped opening (31) is adapted to the thickness of the lower cross beam facade (12), and at least one fixing bolt (7) is provided at the tail of the upper end U-shaped opening (31), and the at least one fixing bolt (7) passes through both sides of the upper end U-shaped opening (31) to clamp the lower cross beam facade (12) in the upper end U-shaped opening (31); The mounting bracket (3) is also provided with a lower U-shaped opening (32) opening vertically upward, the lower U-shaped opening (32) is adapted to the thickness of the upper beam vertical surface (22), the upper beam vertical surface (22) is located in the lower U-shaped opening (32), and a gap is maintained between the upper beam vertical surface (22) and the bottom of the lower U-shaped opening (32); a support member (33) is provided on one side of the lower U-shaped opening (32) and is located at the lower part of the upper beam horizontal surface (21) and is parallel to the upper beam horizontal surface (21); The horizontal plate of the U-shaped bracket (4) is located at the bottom of the support member (33) and has an opening facing upwards; a gap is maintained between the tops of the two side plates of the U-shaped bracket (4) and the horizontal surface of the upper beam (21); the gap between the tops of the two side plates of the U-shaped bracket (4) and the horizontal surface of the upper beam (21) is smaller than the gap between the vertical surface of the upper beam (22) and the bottom of the U-shaped opening (32) at the lower end; The mounting bolt (5) is fixedly mounted on the support member (33), and its tail portion passes through the U-shaped bracket (4) and is threadedly connected to the warning device (6), and the U-shaped bracket (4) can move relative to the mounting bolt (5) and along the mounting bolt (5); A plurality of contact points (61) on the upper surface of the early warning device (6) are in contact with the bottom surface of the horizontal plate of the U-shaped bracket (4).

2. A self-elevating tower crane safety monitoring device according to claim 1, characterized in that: A through hole with a smooth inner wall is provided on the horizontal plate of the U-shaped bracket (4), and the tail of the mounting bolt (5) passes through the through hole on the U-shaped bracket (4) and is fixedly connected to the warning device (6) by means of a thread; The support member (33) is a double-layer structure, comprising an upper support leg (34) and a lower support leg (35), and the mounting bolt (5) is fixedly arranged on the lower support leg (35).

3. A self-elevating tower crane safety monitoring device, arranged at the connection between two adjacent standard sections to be monitored, specifically at the connection between the lower crossbeam (1) of the upper standard section and the upper crossbeam (2) of the lower standard section, wherein both the lower crossbeam (1) and the upper crossbeam (2) are square tubes; characterized in that: It comprises a mounting bracket (3), a U-shaped bracket (4), a mounting bolt (5) and an early warning device (6); The mounting bracket (3) is a square frame structure surrounding the lower crossbeam (1) and the upper crossbeam (2); one corner of the mounting bracket (3) is a hinged structure, and another corner of the mounting bracket (3) is a detachable connection structure; The horizontal plate of the U-shaped bracket (4) is located at the lower part of the bottom surface of the mounting bracket (3) and has an opening facing upwards, and a gap is maintained between the tops of the two side plates of the U-shaped bracket (4) and the lower surface of the upper crossbeam (2); The mounting bolt (5) is fixedly arranged at the bottom of the mounting bracket (3), and its tail portion passes through the horizontal plate of the U-shaped bracket (4) and is threadedly connected to the warning device (6), and the U-shaped bracket (4) can move relative to the mounting bolt (5) along the mounting bolt (5); A plurality of contact points (61) on the upper surface of the early warning device (6) are in contact with the bottom surface of the horizontal plate of the U-shaped bracket (4); A gap is maintained between the upper crossbeam (2) and the bottom of the mounting bracket (3); and a gap between the tops of the two side plates of the U-shaped bracket (4) and the lower surface of the upper crossbeam (2) is smaller than a gap between the upper crossbeam (2) and the bottom of the mounting bracket (3).

4. A self-elevating tower crane safety monitoring device according to claim 3, characterized in that: The mounting bracket (3) comprises two L-shaped brackets hinged to each other, and the non-hinged ends of the two L-shaped brackets are fixedly connected by bolts; Alternatively, the mounting bracket (3) comprises a U-shaped frame and a cover plate hinged thereto, and the U-shaped frame and the cover plate are fixedly connected at the non-hinged ends by bolts.

5. A self-elevating tower crane safety monitoring device according to claim 4, characterized in that: A screw rod (9) is provided between the lower cross beam (1) and the upper cross beam (2); the screw rod (9) passes through two sides of the mounting bracket and is fixed to the mounting bracket (3) by nuts.

6. A self-elevating tower crane safety monitoring device according to claim 5, characterized in that: A through hole with a smooth inner wall is provided on the transverse plate of the U-shaped bracket (4), and the tail of the mounting bolt (5) passes through the through hole on the U-shaped bracket (4) and is threadedly connected to the early warning device (6).

Images