Tower crane provided with pin shaft sensor

Abstract

The utility model relates to a tower crane with pin shaft sensor, which solves the technical problem of how to prevent the folding of the lifting arm and the collapse of the tower crane, and comprises a rotating platform and a lifting arm. The lifting arm comprises a plurality of arm sections connected in sequence, and the two adjacent arm sections are fixedly connected by a pin shaft sensor. The pin shaft sensor detects the stress, and early warning is achieved, so that timely measures can be taken to prevent the folding of the lifting arm and the collapse of the tower crane.

Description

Technical Field

[0001] This utility model relates to the field of tower crane technology, and more specifically, to a tower crane equipped with a pin sensor. Background Technology

[0002] A tower crane is a type of crane used for vertical and horizontal material transport. The main structure of a tower crane consists of the following parts: base, tower body, slewing platform, operator's cab, counterweight boom, lifting boom, and hoisting mechanism. The tower body is a vertical steel structure, typically composed of multiple standard sections, and its height can be adjusted via bolt connections. The slewing platform is located at the upper part of the tower body, allowing the boom to rotate horizontally around the center of the tower body. The operator's cab is mounted on the slewing platform. The lifting boom is responsible for the actual lifting operation and is composed of multiple boom sections connected together. The counterweight boom is used to install counterweights to balance the torque generated by the lifting boom when lifting heavy objects. The hoisting mechanism, driven by a motor and a reducer, rotates the drum to wind or release the wire rope, thus lifting or lowering the goods. References can be made to invention patent applications CN119160803A and CN118718620A, which disclose a tower crane structure. Utility model patent CN219058361U discloses a tower body structure.

[0003] A crane boom consists of multiple sections connected end-to-end. During tower crane operation, accidents such as boom breakage, damage, or even tower crane collapse can sometimes occur. Therefore, preventing boom breakage and avoiding tower crane collapse is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The present invention aims to solve the technical problem of how to prevent the boom from breaking and avoid the collapse of the tower crane, and provides a tower crane equipped with a pin sensor that can effectively achieve prevention.

[0005] This utility model provides a tower crane equipped with a pin sensor, including a slewing platform and a boom. The boom includes multiple boom sections connected end to end. The first boom section is fixedly connected to the slewing platform. The first boom section includes an upper chord and the upper chord of the first boom section is provided with a tail end lug.

[0006] The lower part of the second boom section is welded to the lower part of the first boom section. The upper chord of the second boom section is provided with a front end ear plate and a rear end ear plate. A second pin sensor is fixedly connected to the rear end ear plate of the first boom section by passing through the front end ear plate of the upper chord of the second boom section. Two second pin positioning plates are connected to the rear end ear plate of the first boom section. A second pin with a hole is passed through the two second pin positioning plates and the pin hole at the front end of the second pin sensor. Then, a second cotter pin is passed through the through hole at the end of the second pin with a hole.

[0007] The lower part of the third boom section is welded to the lower part of the second boom section. The upper chord of the third boom section is provided with a front end ear plate and a rear end ear plate. A third pin sensor is fixedly connected to the rear end ear plate of the second boom section by passing through the front end ear plate of the upper chord of the third boom section. Two third pin positioning plates are connected to the rear end ear plate of the second boom section. A third perforated pin passes through the two third pin positioning plates and the pin hole at the front end of the third pin sensor. Then, a third cotter pin passes through the through hole at the end of the third perforated pin.

[0008] Preferably, the rotary platform includes a fixed frame with ear plates. The lower part of the first arm section is welded to the rotary platform. The upper chord of the first arm section has a head ear plate. The ear plate of the upper chord of the first arm section is connected to the ear plate of the rotary platform. Then, a first pin sensor is fixedly connected by passing through the ear plate of the rotary platform and the ear plate of the upper chord of the first arm section. The ear plate of the rotary platform is connected to two pin positioning plates. A first perforated pin passes through the two pin positioning plates on the ear plate of the rotary platform and the pin hole at the front end of the first pin sensor in sequence. A first cotter pin passes through the through hole at the end of the first perforated pin.

[0009] Preferably, the tower crane equipped with pin sensors also includes a controller and an alarm. The alarm is electrically connected to the controller, and each pin sensor is connected to the controller via a signal line.

[0010] The beneficial effect of this utility model is that at each joint of the boom, the force is detected by a pin sensor, and the abnormality is judged based on the force, so as to provide early warning and take timely measures to avoid the boom of the tower crane from breaking and to prevent the tower crane from collapsing.

[0011] Further features and aspects of this invention will be clearly described in the following detailed description with reference to the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the counterweight boom and lifting boom of a tower crane;

[0013] Figure 2 yes Figure 1 Front view of the structure shown;

[0014] Figure 3 yes Figure 1 The diagram shows the structure in which the first boom section is connected to the slewing platform, the second boom section is connected to the first boom section, and the third boom section is connected to the second boom section.

[0015] Figure 4 yes Figure 2 A magnified view of a section at point A in the middle;

[0016] Figure 5 yes Figure 2 A magnified view of a section at point B in the middle;

[0017] Figure 6 yes Figure 2 A magnified view of a section at point C;

[0018] Figure 7 yes Figure 3 The diagram shows a structural design in which the upper chord of the first arm section is fixedly connected to the ear plate on the slewing platform via a pin sensor.

[0019] Figure 8 yes Figure 3 The diagram shows a structure in which the upper chord of the second arm section is fixedly connected to the upper chord of the first arm section via a pin sensor.

[0020] Figure 9 This is an isometric view of the pin sensor;

[0021] Figure 10 yes Figure 9 The front view of the pin sensor is shown.

[0022] Figure 11 yes Figure 9 The top view of the pin sensor shown;

[0023] Figure 12 yes Figure 9 The bottom view of the pin sensor shown;

[0024] Figure 13 This is an isometric view of the pin sensor from another perspective;

[0025] Figure 14 This is a schematic diagram of the structure in which the lug plate of the rotary platform is fixedly connected to the head lug plate of the first arm section through a pin sensor.

[0026] Figure 15 yes Figure 14 The diagram shows the positional relationship between the pin sensor and the two ear plates in the structure shown.

[0027] Explanation of symbols in the diagram:

[0028] 1. Counterbalance boom, 2. Slewing platform, 2-1. Fixed frame, 2-1-1. Ear plate, 3. Lifting boom, 3-1. First boom section, 3-1-1. Upper chord, 3-1-1a. Head ear plate, 3-1-1b. Tail ear plate, 3-2. Second boom section, 3-2-1. Upper chord, 3-2-1a. Head ear plate, 3-2-1b. Tail ear plate, 3-3. Third boom section, 3-3-1. Upper chord, 3-3-1a. Head ear plate; 4. Pin sensor, 4-1. Pin hole, 4-2. Rear end, 5. Pin sensor, 6. Pin sensor, 7. Pin positioning plate, 8. Pin positioning plate, 9. Perforated pin, 10. Cotter pin. Detailed Implementation

[0029] The application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] The specific embodiments described below are merely preferred embodiments of this application, and the scope of protection of this application is not limited thereto. Those skilled in the art can make modifications or variations based on the principles, concepts, and spirit of this application, and the resulting technical solutions should all be covered within the scope of protection of this application.

[0031] This utility model discloses a tower crane equipped with a pin sensor, which is an improvement on the existing tower crane structure. The adjacent boom sections are fixedly connected by a pin sensor, and the first boom section is fixedly connected to the slewing platform by a pin sensor.

[0032] like Figure 1-6 As shown, the tower crane includes a tower body, a slewing platform 2, a counterweight boom 1, a lifting boom 3, etc. The lifting boom 3 includes multiple boom sections connected end to end. The first boom section 3-1 of the lifting boom 3 is connected to the slewing platform 2, the second boom section 3-2 of the lifting boom 3 is connected to the first boom section 3-1, the third boom section 3-3 of the lifting boom 3 is connected to the second boom section 3-2, the fourth boom section of the lifting boom 3 is connected to the third boom section 3-3, and so on, with the last boom section connected to the second-to-last boom section.

[0033] The fixed frame 2-1 of the rotary platform 2 is equipped with a lug plate 2-1-1. The lower part (lower chord) of the first arm section 3-1 is welded to the rotary platform 2. The upper chord 3-1-1 of the first arm section 3-1 is equipped with a head lug plate 3-1-1a and a tail lug plate 3-1-1b. The lug plate 3-1-1a is mated with the lug plate 2-1-1. Then, a pin sensor 4 is fixedly connected by passing through the lug plate 3-1-1a and the lug plate 2-1-1. The pin sensor 4 is a common part on the market. The pin sensor 4 includes a body, and the sensor is installed inside the body, such as... Figure 9-13 As shown, a pin hole 4-1 is made at the front end of the pin sensor 4. (Reference) Figure 3 ,4 Pin positioning plates 7, 14, and 15 are fixedly connected to ear plates 2-1-1. A perforated pin 9 passes sequentially through pin positioning plate 7, pin hole 4-1 at the front end of pin sensor 4, and pin positioning plate 8. A cotter pin 10 then passes through the through hole at the end of the perforated pin 9. When the tower crane's boom 3 lifts a heavy object, the first boom section 3-1 is pulled downwards. Pin sensor 4 detects the force, and the force data detected by pin sensor 4 is sent to the controller via a signal line.

[0034] The lower part of the second arm segment 3-2 is welded to the lower part of the first arm segment 3-1. The upper chord 3-2-1 of the second arm segment 3-2 is provided with a head end ear plate 3-2-1a and a tail end ear plate 3-2-1b. The head end ear plate 3-1-1a of the upper chord 3-2-1 is connected to the tail end ear plate 3-1-1b of the first arm segment 3-1. Then, a pin sensor 5 is fixedly connected by passing through the tail end ear plate 3-1-1b and the head end ear plate 3-1-1a. The structure of the pin sensor 5 is the same as that of the pin sensor 4. Two pin positioning plates are connected to the tail end ear plate 3-1-1b. A pin with a hole passes through the two pin positioning plates and the pin hole at the front end of the pin sensor 5. Then, a cotter pin passes through the through hole at the end of the pin with a hole.

[0035] The lower part of the third arm segment 3-3 is welded to the lower part of the second arm segment 3-2. The upper chord 3-3-1 of the third arm segment 3-3 is provided with a head end ear plate 3-3-1a and a tail end ear plate. The head end ear plate 3-3-1a is connected to the tail end ear plate 3-2-1b of the upper chord 3-2-1 of the second arm segment 3-2. Then, a pin sensor 6 is fixedly connected by passing through the tail end ear plate 3-2-1b and the head end ear plate 3-3-1a. The structure of the pin sensor 6 is the same as that of the pin sensor 4. Two pin positioning plates are connected to the tail end ear plate 3-2-1b. A pin with a hole passes through the two pin positioning plates and the pin hole at the front end of the pin sensor 6. Then, a cotter pin passes through the through hole at the end of the pin with a hole.

[0036] Similarly, the fourth section of boom 3 is also fixedly connected to the third section 3-3 via pin sensors, and so on, with the last section also fixedly connected to the penultimate section via pin sensors. In other words, the lower parts of adjacent boom sections are fixed by welding, while the upper parts are fixed by pin sensors.

[0037] During tower crane operation, each pin sensor detects force data and sends it to the controller. This allows for real-time monitoring of the force at each pin sensor location. The controller can then determine if any abnormalities have occurred based on the force magnitude. For example, if the force value exceeds a certain set threshold, an abnormality is considered to have occurred, providing early warning and enabling timely measures to prevent the tower crane's boom from breaking or the tower crane from collapsing.

[0038] An alarm can be set up so that when the force exceeds a threshold, the controller instructs the alarm to sound an alarm and alert the operator. Alternatively, a display screen can be installed in the control room to show the force value.

Claims

1. A tower crane equipped with a pin-type sensor, comprising a slewing platform and a boom, characterized in that, The lifting boom includes multiple boom sections connected end to end. The first boom section is fixedly connected to the slewing platform. The first boom section includes an upper chord, and the upper chord of the first boom section is provided with a tail end lug. The lower part of the second boom section is welded to the lower part of the first boom section. The upper chord of the second boom section is provided with a front end ear plate and a rear end ear plate. A second pin sensor is fixedly connected to the rear end ear plate of the first boom section by passing through the front end ear plate of the upper chord of the second boom section. Two second pin positioning plates are connected to the rear end ear plate of the first boom section. A second pin with holes is passed through the two second pin positioning plates and the pin hole at the front end of the second pin sensor. Then, a second cotter pin is passed through the through hole at the end of the second pin with holes. The lower part of the third boom section is welded to the lower part of the second boom section. The upper chord of the third boom section is provided with a front end ear plate and a rear end ear plate. A third pin sensor is fixedly connected to the rear end ear plate of the second boom section by passing through the front end ear plate of the upper chord of the third boom section. Two third pin positioning plates are connected to the rear end ear plate of the second boom section. A third perforated pin passes through the two third pin positioning plates and the pin hole at the front end of the third pin sensor. Then, a third cotter pin passes through the through hole at the end of the third perforated pin.

2. The tower crane equipped with a pin-shaft sensor according to claim 1, characterized in that, The rotary platform includes a fixed frame with ear plates. The lower part of the first arm section is welded to the rotary platform. The upper chord of the first arm section has a head ear plate. The ear plate of the upper chord of the first arm section is connected to the ear plate of the rotary platform. Then, a first pin sensor is fixedly connected by passing through the ear plate of the rotary platform and the ear plate of the upper chord of the first arm section. The ear plate of the rotary platform is connected to two pin positioning plates. A first perforated pin passes through the two pin positioning plates on the ear plate of the rotary platform and the pin hole at the front end of the first pin sensor in sequence. A first cotter pin passes through the through hole at the end of the first perforated pin.

3. The tower crane equipped with a pin-shaft sensor according to claim 2, characterized in that, The tower crane equipped with pin sensors also includes a controller and an alarm. The alarm is electrically connected to the controller, and each pin sensor is connected to the controller via a signal line.

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