Overhead crane weight weighing device

Abstract

The utility model belongs to crown block hoisting equipment, and particularly relates to a crown block weight weighing device. The pressure measurement sensor is arranged at the tail end of the lifting hook of the travelling crane, so that the weighing measurement effect on a heavy object lifted by the lifting hook can be effectively realized, and the weighing precision is high. Comprising an annular pressure sensor which is installed on the upper surface of a U-shaped support of a crown block lifting hook through a fixing base. The fixing seat is used for providing radial limiting for the annular pressure sensor. In the assembling process, after a rotating shaft of a crown block lifting hook penetrates through a lifting hook hole of the U-shaped support and a center hole of the annular pressure sensor, the end, penetrating out, of the rotating shaft is sleeved with a baffle ring, and the rotating shaft and the baffle ring are connected into a whole through a pin. The bottom of the baffle ring makes contact with the sensing face of the annular pressure sensor and is used for transmitting the weight of the goods to the annular pressure sensor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the overhead crane hoisting equipment, especially relates to a heavy weight device of overhead crane. BACKGROUND

[0002] In the steel industry, the overhead crane is mainly used as a device for lifting heavy objects in the steel plant and ensuring the operation of the production process. At present, most domestic steel plants rely on weighing sensors as measuring mechanisms in the weight acquisition link of the overhead crane to realize material lifting measurement, equipment load monitoring and other production needs.

[0003] There are several ways to install common weighing sensors: first, the fixed pulley measurement method, which combines the weighing sensor with the mechanical properties of the fixed pulley system of the overhead crane, and converts the monitoring of the force on the fixed pulley into the perception of the weight of the lifted heavy object; second, the dynamic track scale of the track type weighing sensor, which embeds the sensor in the overhead crane running track, and captures the pressure change on the track in real time when the overhead crane passes with heavy objects, and then calculates the weight; third, installing a weighing sensor under the balance lever shaft, which uses the mechanical balance change of the balance lever during lifting to accurately feedback the force on the sensor and calculate the weight of the heavy object; fourth, by increasing the platform scale structure to build a weighing area, the overhead crane places the heavy object on it to realize static weighing; and fifth, directly installing two sensors at both ends of the original fixed pulley shaft, which work together.

[0004] However, when the steel plant needs to upgrade and replace equipment, and needs to modify the weight acquisition system of the existing overhead crane, the above traditional installation methods have many drawbacks. On the one hand, the modification project involves a lot of complicated procedures such as dismantling, rewiring, and structural reinforcement, which is a huge amount of work and seriously affects the normal production of the steel plant. On the other hand, the procurement of new equipment requires a lot of investment, which hinders the improvement of the weight acquisition efficiency of the overhead crane. SUMMARY

[0005] The utility model provides a heavy weight device of overhead crane in view of the defects in the prior art.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a heavy weight device for an overhead crane, comprising a ring-shaped pressure sensor, which is installed on the upper surface of the U-shaped bracket of the overhead crane hook through a fixed seat; the fixed seat is used to provide radial limiting for the ring-shaped pressure sensor.

[0007] During assembly, the rotating shaft of the overhead crane hook passes through the hook hole of the U-shaped bracket and the center hole of the ring-shaped pressure sensor, and the end of the rotating shaft that passes out is sleeved with a retaining ring, and the rotating shaft and the retaining ring are connected by a pin to form an integral body; and the bottom of the retaining ring is in contact with the sensing surface of the ring-shaped pressure sensor to conduct the weight of the goods to the ring-shaped pressure sensor.

[0008] Further, the free end of the rotating shaft is provided with a pin hole one, and the stop ring is provided with a through pin hole two; the pin is locked by the pin lock after penetrating the pin hole one and the pin hole two, so as to prevent the pin from falling off.

[0009] Further, the stop ring adopts a ring structure, and the inner diameter of the ring structure is matched with the rotating shaft, so that the rotating shaft can penetrate the ring structure and the rotating shaft is in contact with the inner wall of the ring structure.

[0010] Further, the fixing seat is provided with a limiting portion and a connecting portion, wherein the limiting portion is provided with a limiting hole for placing the annular pressure sensor, and the connecting portion comprises a connecting lug for connecting with the U-shaped support (3), and the screw is screwed into the U-shaped support after penetrating the connecting lug.

[0011] Further, one connecting portion is arranged on each side of the limiting portion. A soft gasket or rubber ring is arranged in the limiting hole, so as to protect the sensor from mechanical impact.

[0012] Further, the annular pressure sensor is connected with a control box through a sensor signal line, so as to transmit the data of the pressure sensor to the control box; the control box is provided with a controller and a wireless communication module, wherein the controller is used for receiving pressure information and calculating the weight of the hoisted goods according to the pressure information; and the wireless communication module is used for transmitting the weight information of the goods calculated by the controller to a remote terminal.

[0013] Further, the control box is mounted on the outer wall of the U-shaped support.

[0014] Further, the wireless communication module is provided with a wireless signal rod, and the wireless signal rod is mounted on the top of the control box.

[0015] Further, the control box is provided with a display screen for instantaneously displaying the weight of the hoisted goods.

[0016] Compared with the prior art, the utility model has the beneficial effects.

[0017] The overhead crane weight measuring device sets the pressure measuring sensor at the end of the hook of the travelling crane, can effectively realize the weighing measurement of the hoisted weight of the hook, has high weighing precision, and has stable and reliable structure design; and has low transformation cost and good use effect.

[0018] The pressure measuring sensor is transmitted to the crane control room in a wireless mode, so as to reduce the connection cable of the transmission data and be simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described in combination with the drawings and specific embodiments. The protection scope of the utility model is not limited to the following content.

[0020] Figure 1 is the main view of the example overhead crane weight measuring device.

[0021] Figure 2 is the sectional view of the hook part of the example overhead crane weight measuring device.

[0022] Figure 3 is the schematic diagram of the hook system structure in the prior art.

[0023] In the figure, 1, hook; 2, rotating shaft; 3, U-shaped support; 4, blocking ring; 5, fixed seat; 6, pin; 7, annular pressure sensor; 8, control box; 9, steel wire rope; 10, sensor signal line; 11, wireless signal rod; 12, locking pin; 13, rotating seat. DETAILED DESCRIPTION

[0024] In order to better understand the technical scheme of the utility model, the specific implementation scheme is provided as follows; and the following scheme is only used for illustration.

[0025] The hook system of the overhead crane in the prior art is shown in Figure 3 The rotating shaft of the hook is fixed on the upper surface of the U-shaped support 3 through the rotating seat 12, and the hook is rotatably connected with the rotating shaft. In the implementation of the technical scheme, the rotating seat 12 on the U-shaped support 3 is removed, and the annular pressure sensor and the fixed seat are installed, so that the installation of the weight measuring device is completed, and the modification is completed. The modification is easy, and the investment cost is low. The weight of the load under the hook can be accurately measured.

[0026] As shown in Figures 1-2 The utility model is used for the weight measuring device of the overhead crane, which comprises an annular pressure sensor 7, and the annular pressure sensor 7 is installed on the upper surface of the U-shaped support 3 of the hook of the overhead crane through a fixed seat 5. The fixed seat 5 is used for providing radial limiting of the annular pressure sensor 7. When assembled, the rotating shaft 2 of the hook of the overhead crane passes through the hook hole of the U-shaped support 3 and the center hole of the annular pressure sensor 7, and then one end of the rotating shaft 2 that penetrates out is sleeved with a blocking ring 4, and the rotating shaft 2 and the blocking ring 4 are connected as a whole through a pin 6. The bottom of the blocking ring 4 is in contact with the sensing surface of the annular pressure sensor 7, so as to conduct the weight of the goods to the annular pressure sensor.

[0027] The stop ring 4 limits the axial movement of the rotating shaft 2 and its bottom directly contacts the sensing surface of the annular pressure sensor 7. This direct contact is the key path for the transmission of the weight of the goods to the annular pressure sensor 7, enabling the sensor to detect the actual force and convert it into measurable data. To ensure that the stop ring 4 and the rotating shaft 2 form an inseparable whole, they are connected by a pin 6. The pin 6 passes through the pin holes prepared in advance on the stop ring 4 and the rotating shaft 2, so that the two components are firmly combined together. In this way, when the goods are lifted, any force applied to the rotating shaft 2 will be directly transmitted to the stop ring 4 and then to the annular pressure sensor 7, ensuring that the sensor can accurately record the weight change in each lifting operation. When the goods are lifted, the weight borne by the overhead crane hook is transmitted to the stop ring 4 through the rotating shaft 2, and then to the sensing surface of the annular pressure sensor 7. Due to the close contact between the stop ring 4 and the annular pressure sensor 7, the weight of the goods is effectively transmitted to the sensor, enabling it to sense the actual pressure value. The annular pressure sensor 7 converts this physical quantity into an electrical signal for subsequent processing and display.

[0028] In this embodiment, the free end of the rotating shaft 2 is designed with a pin hole I, which is drilled along the radial direction of the rotating shaft 2 to ensure that the pin 6 can be inserted transversely. The stop ring 4 is an annular component that can be fitted on the rotating shaft 2. The stop ring 4 is provided with a through pin hole II at a corresponding position, which is also radially arranged and aligned with the pin hole I on the rotating shaft 2. When the pin 6 passes through the two aligned pin holes, it fixes the stop ring 4 at one end of the rotating shaft 2.

[0029] To further enhance the safety of the device, a locking pin 12 is also provided at the end of the pin 6. The locking pin 12 is used to lock the position of the pin 6 to ensure that it does not accidentally fall off during work, even if it is affected by vibration or other external forces, thereby ensuring the stability and safety of the entire structure. This double locking mechanism greatly reduces the safety hazards caused by loose or missing parts.

[0030] The stop ring 4 adopts a ring structure, and its inner diameter is precisely machined to match the outer diameter of the rotating shaft 2, so that the stop ring 4 can be tightly fitted on the rotating shaft 2. This adaptability not only ensures good contact between the stop ring 4 and the rotating shaft 2, but also ensures that there is no unnecessary gap between them, reducing wear caused by friction or vibration. In summary, the rotating shaft 2, the stop ring 4, the pin 6 and the locking pin 12 in this embodiment work together to form a safe and efficient mechanical connection system, which not only meets the needs of weighing heavy objects in overhead crane lifting operations, but also realizes the stable connection and precise positioning between key components through a mechanical interface.

[0031] The fixed seat 5 not only provides a mounting position for the annular pressure sensor 7, but also ensures that the sensor can be stably and reliably fixed during operation. The fixed seat 5 is composed of two main parts: a limiting part and a connecting part.

[0032] The limiting part is located at the center of the fixed seat 5, and a precisely machined limiting hole is opened on it. The size of the limiting hole is completely matched with the shape of the annular pressure sensor 7, so that the sensor can be accurately placed in it. The design of the limiting hole takes into account the shape and size of the sensor, ensuring that the sensor will not move unnecessarily in any case, thereby guaranteeing the accuracy of the weighing data. In addition, soft pads or rubber rings can be provided inside the limiting hole to protect the sensor from mechanical impact and further improve the stability of the installation.

[0033] The connecting part is distributed on both sides of the limiting part, and each connecting part is equipped with a connecting ear. By passing a screw through the through hole on the connecting ear and fastening it in the corresponding threaded hole on the U-shaped support 3, a firm combination between the fixed seat 5 and the U-shaped support 3 is achieved. Such design ensures that the fixed seat 5 will not shift due to vibration during hoisting or changes in the weight of the goods. At the same time, since the connecting part is located on both sides of the limiting part, this symmetrical layout helps to evenly distribute the force, preventing structural deformation or damage caused by uneven force, ensuring the long-term stability and reliability of the entire device. In order to optimize the force balance, one connecting part is provided on each side of the fixed seat 5, arranged symmetrically to ensure that when the annular pressure sensor 7 bears pressure from above, the force can be evenly distributed to the U-shaped support 3. This symmetrical design also improves the system's ability to resist external impact, reducing the risk of accidental failure.

[0034] In embodiment 3, the annular pressure sensor 7 is connected to a control box 8 through a sensor signal line 10 for transmitting pressure sensor data to the control box. The control box 8 is provided with a controller and a wireless communication module, wherein the controller is used to receive pressure information and calculate the weight of the hoisted goods according to the pressure information; the wireless communication module is used to transmit the weight information calculated by the controller to a remote terminal. That is, the annular pressure sensor can convert the detected pressure size into an electrical signal and transmit it to the control box through the sensor signal line, so that the control box can calculate the actual weight of the hoisted goods. The control box 8 is installed on the outer wall of the U-shaped support 3, and is centrally arranged to save space. The wireless communication module is equipped with a wireless signal rod 11, which is installed on the top of the control box 8. It is convenient to transmit wireless signals, and the weight data is sent to the operating area away from the overhead crane through the wireless signal rod 11, so that the operator can obtain the weight information of the hoisted goods in real time. A display screen is provided on the control box for instant display of the weight of the hoisted goods. It is convenient for on-site operators to monitor the weight of the goods to adjust the configuration.

[0035] Working principle and working process are briefly described:

[0036] 1、When the need to weigh the goods hoisting, artificial open to the goods, the hook through the lifting rope to the need to hoist the goods hoisting, when the crane wire process, the hook is lifted, the goods are lifted off the ground, the hook at this time the weight is transmitted to the ring pressure sensor through the blocking ring.

[0037] 2、The pressure sensor transmits the measured pressure to the control box through the signal line, and the control box transmits the pressure data to the control room (or manually holds the crane operator) through the wireless signal rod, so that the operator can obtain the weight of the hoisted goods.

[0038] 3、A display screen is arranged on the control box, which displays the weight of the hoisted goods at all times, so that the on-site operator can know the weight of the hoisted goods in real time, so as to configure the weight of the goods according to the demand.

[0039] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some or all of the technical features can be replaced by equivalents; therefore, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope defined by the claims of the present application.

Claims

1. A crown block load weighing device, characterized by, The application relates to a load sensor for a crane hook, which comprises a ring-shaped pressure sensor (7) installed on the upper surface of a U-shaped support (3) of the crane hook through a fixing seat (5); the fixing seat (5) is used for providing radial limiting of the ring-shaped pressure sensor (7). During assembly, the rotating shaft (2) of the crane hook passes through the hook hole of the U-shaped support (3) and the center hole of the ring-shaped pressure sensor (7), and then the end of the rotating shaft (2) that penetrates out is sleeved with a retaining ring (4); the rotating shaft (2) and the retaining ring (4) are connected as a whole through a pin (6); and the bottom of the retaining ring (4) is in contact with the sensing surface of the ring-shaped pressure sensor (7) to conduct the weight of goods to the ring-shaped pressure sensor.

2. The heavy weight device of claim 1, wherein: A pin hole one is formed in the free end of the rotating shaft (2), and a through pin hole two is horizontally arranged on the retaining ring (4); the pin (6) passes through the pin hole one and the pin hole two and is locked by a lock pin (12) to prevent the pin (6) from being axially separated.

3. The heavy weight device of claim 1, wherein: The retaining ring (4) adopts a ring structure, and the inner diameter of the ring structure is matched with the rotating shaft (2) so that the rotating shaft (2) can pass through the ring structure and be in contact with the inner wall of the ring structure.

4. The heavy weight device of claim 1, wherein: The fixing seat (5) is provided with a limiting portion and a connecting portion; a limiting hole is formed in the limiting portion and is used for placing the ring-shaped pressure sensor (7); the connecting portion comprises a connecting lug which is used for being connected with the U-shaped support (3); and a screw is screwed into the U-shaped support (3) through the connecting lug.

5. The heavy weight device of claim 4, wherein: One connecting portion is arranged on each side of the limiting portion.

6. The heavy weight device of claim 4, wherein: A soft gasket or rubber ring is arranged in the limiting hole to protect the sensor from mechanical impact.

7. The heavy weight device of claim 1, wherein: The ring-shaped pressure sensor (7) is connected with a control box (8) through a sensor signal line (10) and is used for transmitting the data of the pressure sensor to the control box; the control box (8) is provided with a controller and a wireless communication module; the controller is used for receiving pressure information and calculating the weight of the hoisted goods according to the pressure information; and the wireless communication module is used for transmitting the weight information of the goods calculated by the controller to a remote terminal.

8. The heavy weight device of claim 7, wherein: The control box (8) is installed on the outer wall of the U-shaped support (3).

9. The heavy weight device of claim 7, wherein: The wireless communication module is provided with a wireless signal rod (11) which is installed on the top of the control box (8).

10. The heavy weight device of claim 7, wherein: A display screen is arranged on the control box and is used for instantaneously displaying the weight of the hoisted goods.

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