Novel main cable anti-twisting device of tower crane

Abstract

The utility model discloses a novel anti-twisting device for a main cable of a tower crane, and relates to the technical field of safety protection of cables of tower cranes. The novel main cable anti-twisting device of the tower crane comprises a compression nut, a conical rubber sleeve, a travel switch, a fixed screw sleeve, a support and a screw rod, the compression nut is mounted at the end part of the screw rod, is used for compressing the conical rubber sleeve to fix the main cable, and can rotate along with the main cable of the tower crane and the screw rod to touch the travel switch to realize alarming and limiting; the conical rubber sleeves are mounted in inner holes in two end parts of the screw rod and are used for penetrating through and fixing a main cable; the travel switch adopts a universal double-control travel switch and is mounted on the support; the fixed screw sleeve is mounted at a rest platform in the tower crane rotary table; the support is mounted on the fixed screw sleeve, and the travel switch is mounted on the support; a round hole is formed in the center of the screw, standard threads are arranged at the two ends and used for installing the pressing nut, and a transmission thread is arranged in the middle and meshed with the fixing thread sleeve.

Description

Technical Field

[0001] The utility model relates to a cable anti-twisting device, in particular to a novel tower crane main cable anti-twisting device. Background Art

[0002] In recent years, the construction industry has developed rapidly and high-rise buildings have become more and more common, which has led to the extensive use of tower cranes in construction projects. However, during the application of tower cranes, the problem of cable sprains caused by the failure of the turntable slewing limit and the careless installation resulting in the self-torsion of the cable has become increasingly prominent. Therefore, it is urgent to study a new type of tower crane main cable anti-twist device. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the utility model is to provide a safe and reliable novel anti-twisting device for the main cable of a tower crane.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the utility model discloses a novel anti-twisting device for the main cable of a tower crane, which is characterized by comprising: a clamping nut, a cone rubber sleeve, a travel switch, a fixed screw sleeve, a support, and a screw rod; the clamping nut is integrally cast by acrylic resin, has a built-in thread, is installed at the end of the screw rod through the thread, and is used to clamp the cone rubber sleeve to fix the main cable, and can rotate with the tower crane main cable and the screw rod to touch the travel switch; the cone rubber sleeve is made of rubber, is installed in the inner holes at both ends of the screw rod, and the tower crane main cable passes through its center hole, and is used to fix the main cable Cable; the travel switch adopts a universal double-control travel switch, which is fixed on the support by bolt connection; the fixed screw sleeve is integrally cast by acrylic resin and fixed on the rest platform inside the tower crane turntable by bolts; the support is made by cutting steel plates and is connected to the fixed screw sleeve by bolts for installing and fixing the travel switch; the screw rod is integrally cast by acrylic resin, and standard threads are provided at both ends for installing the clamping nut, and a transmission thread is provided in the middle part for meshing with the fixed screw sleeve, and a built-in round hole is provided in the center, and cone rubber sleeves are installed at both ends of the built-in round hole.

[0007] Preferably, the clamping nut is cast from acrylic resin into a flange structure with an upper portion of φ100mm×20mm and a lower portion of φ150mm×10mm, and is provided with an M80mm threaded circular hole.

[0008] Preferably, the cone rubber sleeve has a taper of 1:10, and an inner hole matching the main cable of the tower crane is provided at the center.

[0009] Preferably, the travel switch adopts a double-control travel switch, with one group of normally open contacts and one group of normally closed contacts.

[0010] Preferably, the fixing screw sleeve is cast from acrylic resin into a φ150mm×200mm cylinder, with a φ220mm×20mm disc in the middle of the cylinder forming an integrated structure, with M100mm×200mm threaded holes inside, and the middle disc is provided with 4 φ18mm bolt fixing holes, which are fixed to the rest platform inside the tower crane turntable by bolts.

[0011] Preferably, the support is made by cutting a 3mm thick steel plate, and a long strip hole is provided on the vertical surface for adjusting the travel switch up and down.

[0012] Preferably, the screw is cast from acrylic resin, with M80 30mm long standard threads at both ends, M100 transmission threads in the middle, and a φ60mm×460mm round hole in the center.

[0013] (III) Beneficial effects

[0014] The technical problem to be solved by the utility model is to provide a safe and reliable new type of tower crane main cable anti-twist device to solve the cable twisting problem at the turntable caused by the failure of the existing tower crane slewing limit and the twisting force of the main cable caused by careless installation. The utility model has the advantages of novel structure, safety, reliability, and convenient installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of a novel tower crane main cable anti-twisting device according to an embodiment of the utility model;

[0016] Figure 2 It is a cross-sectional view of a novel tower crane main cable anti-twisting device according to an embodiment of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of a compression nut of a new type of anti-twist device for main cables of a tower crane described in an embodiment of the utility model;

[0018] Figure 4 It is a three-dimensional diagram of a screw rod of a new type of anti-twist device for main cables of a tower crane described in an embodiment of the utility model;

[0019] Figure 5 It is a three-dimensional diagram of a fixing screw sleeve of a new tower crane main cable anti-twist device according to an embodiment of the utility model; DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the present utility model in conjunction with the accompanying drawings and examples. The following implementation is only used to illustrate the present utility model, but is not intended to limit the scope of the present utility model.

[0021] Figure 1 It is a three-dimensional diagram of a novel tower crane main cable anti-twist device according to an embodiment of the utility model, comprising: a clamping nut (1), a cone rubber sleeve (2), a travel switch (3), a fixing screw sleeve (4), a support (5) and a screw rod (6);

[0022] Figure 2 This is a cross-sectional view of a novel tower crane main cable anti-twist device according to an embodiment of the utility model, comprising: a compression nut (1), a cone rubber sleeve (2), a fixing screw sleeve (4), and a screw rod (6);

[0023] Figure 3 It is a new type of tower crane main cable anti-twist device tightening nut diagram described in the embodiment of the utility model, which is cast from acrylic resin into a flange structure with an upper part of φ100mm×20mm and a lower part of φ150mm×10mm, and an M80mm threaded circular hole is arranged inside.

[0024] Figure 4 It is a new type of tower crane main cable anti-twisting device fixing screw sleeve described in the embodiment of the utility model. It is cast from acrylic resin into a φ150mm×200mm cylinder, with a φ220mm×20mm disc in the middle of the cylinder to form an integrated structure, with M100mm×200mm threaded holes inside, and 4 φ18mm bolt fixing holes in the middle disc, which are fixed to the rest platform inside the tower crane turntable by bolts.

[0025] Figure 5 It is a new type of tower crane main cable anti-twist device screw diagram described in the embodiment of the utility model. It is cast by acrylic resin, with M80 30mm long standard threads at both ends, M100 transmission threads in the middle, and a φ60mm×460mm round hole in the center.

[0026] The specific working principle is as follows:

[0027] A new type of anti-twist device for the main cable of a tower crane. When in use, the device is fixed to the rest platform inside the tower crane turntable by bolts, and the main cable is inserted through the clamping nut, cone rubber sleeve, and screw inner hole at the bottom of the device, and is led out from the screw inner hole, cone rubber sleeve, and clamping nut at the top of the device to enter the main control box in the cab. At this time, it is noted that about 150mm margin must be left for the main cable passing through the upper and lower positions of the device, and then the main cable and the upper and lower parts of the screw are locked into one by the clamping nut and cone rubber sleeve. At this time, when the tower crane turntable rotates, the cable follows When the screw rotates forward or reverses to ±450°, the normally open contacts of the travel switch are triggered by the upper or lower clamping nut to give an audible and visual alarm. When the screw rotates forward or reverses to more than ±540°, the normally closed contacts of the travel switch are triggered by the upper or lower clamping nut to stop the forward or reverse operation of the tower crane. The crane can only run in the opposite direction of the original direction. The early warning and limit function of the device can achieve early warning of the slewing operation of the tower crane to ensure safe operation and prevent the main cable from being twisted.

[0028] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. All equivalent technical solutions also belong to the scope of the present invention. The scope of patent protection of the present invention should be limited by the claims.

Claims

1. A new type of tower crane main cable anti-twist device, characterized in that: include: A clamping nut (1), a cone rubber sleeve (2), a travel switch (3), a fixing screw sleeve (4), a support (5), and a screw rod (6); the clamping nut (1) is integrally cast from acrylic resin and has a built-in thread. It is installed at the end of the screw rod (6) through the thread and is used to clamp the cone rubber sleeve (2) to fix the main cable. At the same time, it can rotate with the tower crane main cable and the screw rod (6) to touch the travel switch (3); the cone rubber sleeve (2) is made of rubber and is installed in the inner holes at both ends of the screw rod (6). The tower crane main cable passes through its center hole and is used to fix the main cable; the travel switch (3) is made of A universal double-control stroke switch is fixed to a support (5) by bolt connection; the fixing screw sleeve (4) is integrally cast from acrylic resin and fixed to the rest platform inside the tower crane turntable by bolts; the support (5) is cut and manufactured from a steel plate and connected to the fixing screw sleeve (4) by bolts for mounting a fixed stroke switch (3); the screw rod (6) is integrally cast from acrylic resin and has standard threads at both ends for mounting a clamping nut (1); a transmission thread is provided in the middle portion for meshing with the fixing screw sleeve (4); a circular hole is provided in the center, and conical rubber sleeves are mounted at both ends of the circular hole.

2. A novel tower crane main cable anti-twisting device as claimed in claim 1, characterized in that: The clamping nut (1) is cast from acrylic resin into a flange structure with an upper portion of φ100mm×20mm and a lower portion of φ150mm×10mm, and has an M80mm threaded circular hole built in.

3. A novel tower crane main cable anti-twisting device as claimed in claim 1, characterized in that: The cone rubber sleeve (2) has a taper of 1:10 and is provided at its center with an inner hole matching the main cable of a tower crane.

4. A novel tower crane main cable anti-twisting device as claimed in claim 1, characterized in that: The travel switch (3) is a double-control travel switch, with one group of normally open contacts and one group of normally closed contacts.

5. A novel tower crane main cable anti-twisting device as claimed in claim 1, characterized in that: The fixing screw sleeve (4) is cast from acrylic resin into a φ150mm×200mm cylinder, with a φ220mm×20mm disc in the middle of the cylinder to form an integrated structure, with M100mm×200mm threaded holes arranged inside, and the middle disc is provided with 4 φ18mm bolt fixing holes, which are fixed to the rest platform inside the tower crane turntable by bolts.

6. A novel tower crane main cable anti-twisting device as claimed in claim 1, characterized in that: The support (5) is made by cutting a 3 mm thick steel plate, and a long strip hole is provided on the vertical surface for adjusting the travel switch (3) up and down.

7. A novel tower crane main cable anti-twisting device as claimed in claim 1, characterized in that: The screw (6) is cast from acrylic resin, has M80 standard threads at both ends, an M100 transmission thread in the middle, and a φ60 mm round hole in the center.

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