Automatic tensioning device for driving wheel of duct piece crane and tensioning method of automatic tensioning device

Abstract

The invention discloses a segment crane driving wheel automatic tensioning device and a tensioning method thereof.The segment crane driving wheel automatic tensioning device comprises a sliding base arranged on a walking beam in a sliding mode, and a containing hole channel facing the beam face of the walking beam is formed in the sliding base; the wheel seat is arranged in the accommodating hole channel in a sliding manner, and a rubber wheel is rotatably mounted on the wheel seat; the pressurizing cylinder is used for driving the wheel seat to enable the rubber wheel to press against the beam surface, and is mounted between the wheel seat and the sliding seat; the pressure sensor is used for collecting the pressure value of pressure gas in the pressurizing air cylinder and is mounted on the pressurizing air cylinder; the electric valve is arranged on a gas conveying pipe of the pressurizing cylinder; and the controller is connected to the pressure sensor and the electric valve. The problem that a rubber wheel of an existing driving system of a shield tunneling machine segment crane is prone to slipping is solved.

Description

Technical Field

[0001] The invention relates to the technical field of segment cranes for shield machines, and in particular to an automatic tensioning device for a driving wheel of a segment crane and a tensioning method thereof. Background Art

[0002] The main function of the shield machine segment crane system is to lift the precast concrete segments located at the rear supporting trailer No. 1 to the segment assembly machine grabbing area for the assembly machine to grab, and assemble the segment segments into a complete ring under the rotation, lifting, translation and other actions of the assembly machine; the commonly used segment crane drive systems can generally be divided into three types according to the drive structure type:

[0003] 1) Friction drive between rubber wheel and walking surface;

[0004] 2) Sprocket chain drive;

[0005] 3) Rack and pinion drive.

[0006] The principle of friction drive between the rubber wheel and the walking surface is as follows: the rubber wheel fits tightly against the walking surface under the pressure of the spring. Due to the friction between the surface of the rubber wheel and the walking surface, when the driving motor drives the rubber wheel to rotate, the rubber wheel and the walking beam produce relative displacement under the action of friction, thereby realizing the forward and backward movement of the segment crane system on the walking beam.

[0007] The current problems with the rubber wheel drive structure are as follows: the surface of the rubber wheel will wear after working for a long time, and the diameter of the outer surface of the rubber wheel will decrease. Under the action of the spring pre-pressure, although the rubber wheel fits tightly against the walking surface, the friction between the rubber wheel and the walking beam decreases due to the corresponding reduction in the spring pre-pressure, which can easily cause the rubber wheel to "slip" when rotating. The "slipping" phenomenon aggravates the further wear of the rubber layer of the rubber wheel, further reducing the size and pre-pressure, thus forming a vicious cycle mechanism of reduced rubber wheel size → reduced pre-pressure → reduced friction → rubber wheel "slipping" → wear of the rubber layer on the rubber wheel surface, which greatly reduces the transportation efficiency of the pipe segments. Summary of the invention

[0008] In order to overcome the defects of the prior art, an automatic tensioning device for a segment crane driving wheel and a tensioning method thereof are provided to solve the problem that the rubber wheel of the driving system of the existing shield machine segment crane is prone to slipping.

[0009] In order to achieve the above object, an automatic tensioning device for a driving wheel of a segment crane is provided, comprising:

[0010] A sliding seat is slidably arranged on the walking beam, wherein the sliding seat is formed with an accommodating channel arranged toward the beam surface of the walking beam;

[0011] A wheel seat, slidably disposed in the accommodating channel, and a rubber wheel is rotatably mounted on the wheel seat;

[0012] A pressurized cylinder for driving the wheel seat to press the rubber wheel against the beam surface, installed between the wheel seat and the sliding seat;

[0013] A pressure sensor for collecting the pressure value of the pressurized gas inside the pressurized cylinder, installed in the pressurized cylinder;

[0014] An electric valve installed on the gas pipe of the pressurized cylinder;

[0015] A controller is connected to the pressure sensor and the electric valve.

[0016] Furthermore, one end of the wheel seat is slidably disposed in the accommodating channel, and the other end of the wheel seat extends to the outside of the accommodating channel. Reaction plates are formed on opposite sides of the other end of the wheel seat, and the pressurized cylinder is installed between the reaction plates and the sliding seat.

[0017] Furthermore, the sliding seat is formed with two limit plates, and the two limit plates are respectively arranged on the opposite sides of the accommodating channel. Guide holes are opened on the limit plates, and guide blocks are formed on the opposite sides of the other end of the wheel seat, and the guide blocks are slidably arranged in the guide holes.

[0018] Furthermore, the sliding seat comprises:

[0019] A base plate, the base plate is arranged opposite to the beam surface, the two opposite sides of the base plate are respectively connected with side plates, the two side plates respectively extend to the two opposite sides of the walking beam, the side of the walking beam is formed with a slide groove, and the accommodating channel is formed in the base plate;

[0020] The guide wheel is rotatably mounted on the inner side of the side portion and slidably arranged in the slide groove.

[0021] Furthermore, an assembly groove is formed at one end of the wheel seat, the rubber wheel is rotatably arranged in the assembly groove, one side of the rubber wheel extends to the outside of the assembly groove, and both ends of the wheel axle of the rubber wheel are rotatably installed on two opposite groove walls of the assembly groove.

[0022] The present invention provides a tensioning method for an automatic tensioning device for a driving wheel of a segment crane, comprising the following steps:

[0023] The controller controls the electric valve to input pressurized gas into the pressurized cylinder, and the telescopic end of the pressure cylinder extends out of the driving wheel seat to make the rubber wheel on the wheel seat press against the beam surface;

[0024] The pressure sensor collects the pressure value of the pressure gas inside the pressurized cylinder in real time;

[0025] The controller obtains the pressure value, and a pressure standard value is preset in the controller. When the pressure value is less than the pressure standard value, the controller controls the electric valve to input pressurized gas into the pressurized cylinder so that the pressure value is adapted to the pressure standard value.

[0026] The beneficial effect of the present invention is that the automatic tensioning device for the driving wheel of the segment crane of the present invention can automatically detect the pressure between the rubber wheel and the walking surface. When the pressure data of the rubber wheel is low due to wear, the device can automatically pressurize the contact position between the rubber wheel and the walking surface, and maintain the set pressure unchanged after reaching the set pressure value, so that the friction between the rubber wheel and the walking surface is basically maintained in a relatively stable state, reducing the slippage of the rubber wheel and ensuring the normal operation of the segment crane driving system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0028] Figure 1 It is a schematic structural diagram of an automatic tensioning device for a driving wheel of a segment crane according to an embodiment of the present invention.

[0029] Figure 2 Schematic diagram of the structure of the sliding seat according to an embodiment of the present invention.

[0030] Figure 3 Schematic diagram of the structure of the wheel seat according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the usage status of the automatic tensioning device for the driving wheel of a segment crane according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Reference Figures 1 to 4 As shown, the present invention provides an automatic tensioning device for a driving wheel of a segment crane, comprising: a sliding seat 1, a wheel seat 2, a pressurized cylinder 3, a pressure sensor 4, an electric valve 5, and a controller 6.

[0035] Specifically, the sliding seat 1 is slidably mounted on the walking beam 7 . The sliding seat 1 is formed with an accommodating channel disposed toward the beam surface 70 of the walking beam 7 .

[0036] As a preferred implementation, the sliding seat 1 includes: a base plate 11 and a guide wheel 12 .

[0037] The base plate 11 is in a long strip shape and is arranged along the length direction of the walking beam. The base plate 11 is arranged opposite to the beam surface 70 of the walking beam.

[0038] The two opposite sides of the base plate 11 are connected with side plates 111 respectively. The two side plates 111 extend to the two opposite sides of the walking beam 7 respectively. The side of the walking beam 7 is formed with a slide groove 700. The accommodating channel is formed in the base plate 11.

[0039] The guide wheel 12 is rotatably mounted on the inner side of the side portion and is slidably disposed in the slide groove 700 .

[0040] In this embodiment, two guide wheels are respectively arranged on the inner side of each side plate, and the two guide wheels are arranged along the length direction of the walking beam.

[0041] The wheel seat 2 is slidably disposed in the accommodating channel. The wheel seat 2 is rotatably mounted with a rubber wheel 22.

[0042] Specifically, one end of the wheel seat 2 is slidably disposed in the accommodating channel, and the other end of the wheel seat 2 extends to the outside of the accommodating channel.

[0043] The pressurizing cylinder 3 is installed between the wheel seat 2 and the sliding seat 1. The pressurizing cylinder 3 is used to drive the wheel seat 2 to press the rubber wheel 22 against the beam surface 70.

[0044] Specifically, reaction plates 21 are formed on opposite sides of the other end of the wheel seat 2. The pressurizing cylinder 3 is installed between the reaction plate 21 and the sliding seat 1.

[0045] In this embodiment, ear plates are formed on the outer side of the base plate and the reaction plate, respectively. Two ends of the pressurizing cylinder are hinged to the ear plates of the base plate and the reaction plate, respectively.

[0046] The pressure sensor 4 is installed on the pressurized cylinder 3 . The pressure sensor 4 is used to collect the pressure value of the pressurized gas inside the pressurized cylinder 3 .

[0047] The electric valve 5 is installed on the air supply pipe of the pressurized cylinder 3 .

[0048] The controller 6 is connected to the pressure sensor 4 and the electric valve 5 .

[0049] As a preferred embodiment, the sliding seat 1 is formed with two limit plates 13. The two limit plates 13 are respectively arranged on opposite sides of the accommodating channel. A guide hole is opened on the limit plate 13. A guide block 23 is formed on opposite sides of the other end of the wheel seat 2. The guide block 23 is slidably arranged in the guide hole.

[0050] In this embodiment, one end of the guide hole passes through a side of the limiting plate away from the base plate.

[0051] As a preferred embodiment, a mounting groove is formed at one end of the wheel seat 2. The rubber wheel 22 is rotatably disposed in the mounting groove. One side of the rubber wheel 22 extends to the outside of the mounting groove. Both ends of the wheel axle of the rubber wheel 22 are rotatably mounted on two opposite groove walls of the mounting groove.

[0052] The present invention provides a tensioning method for an automatic tensioning device for a driving wheel of a segment crane, comprising the following steps:

[0053] S1 , the controller 6 controls the electric valve 5 to input pressurized gas into the pressurized cylinder 3 , and the telescopic end of the pressure cylinder extends out to drive the wheel seat 2 so that the rubber wheel 22 on the wheel seat 2 is pressed against the beam surface 70 .

[0054] S2. The pressure sensor 4 collects the pressure value of the pressurized gas inside the pressurized cylinder 3 in real time.

[0055] S3, the controller 6 obtains the pressure value. The controller 6 has a preset pressure standard value. When the pressure value is less than the pressure standard value, the controller 6 controls the electric valve 5 to input pressurized gas into the pressurized cylinder 3 so that the pressure value is adapted to the pressure standard value.

[0056] In this embodiment, the rubber wheel is a composite travel wheel, with a rubber layer vulcanized on the outer surface and an internal structure made of steel. The wheel axle of the rubber wheel is connected to the reducer through a spline shaft. Bearings are installed at both ends of the wheel axle. The bearings are installed in the bearing holes on the groove wall of the assembly groove of the wheel axle. When the motor is working, the torque output by the motor is transmitted to the rubber wheel through the reducer and the spline shaft, thereby driving the rotation of the rubber wheel.

[0057] The wheel seat is a steel structure, and the bearing holes for installing the rubber wheel bearings are processed on both sides of the wheel seat. At the same time, guide blocks and reaction plates for installing the pressurized cylinder are designed in front and behind the wheel seat. The guide block of the wheel seat cooperates with the guide hole designed on the sliding seat (the guide hole is a strip hole and is along the depth direction of the assembly groove). After the two are assembled, the guide block can move up and down in the guide hole.

[0058] The pressurized cylinder is a device for pressurizing the rubber wheel. The pressurized cylinder is connected to the wheel seat and the sliding seat respectively. Under the action of the pressurized gas, the pressurized cylinder presses the rubber wheel tightly against the beam surface (walking surface), thereby ensuring sufficient friction between the rubber wheel and the walking surface.

[0059] In this embodiment, the electric valve is an electromagnetic ball valve. The electromagnetic ball valve is a valve for controlling the introduction of pressurized gas into the pressurized cylinder. By opening and closing the ball valve, pressurized gas can be introduced into the pressurized cylinder or the pressure in the pressurized cylinder can be kept constant. The opening and closing of the electromagnetic ball valve is controlled by the signal output by the controller.

[0060] The pressure sensor is a detection element that detects the internal pressure of the pressurized cylinder and is installed between the electromagnetic ball valve and the pressurized cylinder. When the internal pressure of the pressurized cylinder decreases, the pressure sensor sends a signal to the controller, and the controller issues an action command based on the received signal.

[0061] The controller is the core control element of the entire automatic tensioning device. It is pre-programmed with a control program and a calculated initial pressure value according to system requirements. The value detected by the pressure sensor is compared with the initial pressure value. When the detected value is less than the pressure standard value, the controller sends a signal to open the electromagnetic ball valve. At this time, the electromagnetic ball valve opens and pressurized air enters the pressurized cylinder; when the value detected by the pressure sensor is consistent with the initial pressure value, the controller sends a signal to close the electromagnetic ball valve. At this time, the electromagnetic ball valve closes and the pressurized cylinder enters a constant pressure state.

[0062] Before the whole device of the automatic tensioning device for driving wheels of the pipe segment crane of the present invention is installed, the friction force between the rubber wheel and the walking surface is calculated, and the pressure (standard pressure value) between the rubber wheel and the walking surface is reversed according to the calculation result, and the pressure value is written into the program of the controller as the standard pressure value. During the operation of the pipe segment crane, the rubber wheel will inevitably wear due to long-term friction rotation. After wear, the outer diameter of the rubber wheel decreases, and the wheel seat and the sliding seat produce relative displacement in the vertical direction. The wheel seat moves upward under the action of the pressurized cylinder. At this time, the pressure value of the contact position between the rubber wheel and the walking surface decreases, and the pressure value of the pressure gas inside the pressurized cylinder decreases accordingly. After the pressure sensor detects the pressure value reduction, it sends a relevant signal to the controller. The controller compares the received pressure value with the standard pressure value. When the measured value is less than the standard pressure value, the controller sends an opening instruction to the electromagnetic ball valve, the electromagnetic ball valve opens, and the pressure gas enters the pressurized cylinder, and the pressure value increases accordingly; when the pressure value detected by the pressure sensor is consistent with the standard pressure value, the controller sends a closing instruction to the electromagnetic ball valve, and the electromagnetic ball valve closes. At this time, the pressurized cylinder 4 is in a pressure-maintaining state until the next cycle.

[0063] The automatic tensioning device for the driving wheel of the segment crane of the present invention can automatically detect the pressure between the rubber wheel and the walking surface. When the pressure data of the rubber wheel is low due to wear, the device can automatically pressurize the contact position between the rubber wheel and the walking surface, and maintain the set pressure unchanged after reaching the set pressure value, so that the friction between the rubber wheel and the walking surface is basically maintained in a relatively stable state, reducing the slippage of the rubber wheel and ensuring the normal operation of the segment crane driving system.

[0064] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An automatic tensioning device for driving wheels of a segment crane, characterized in that: include: A sliding seat is slidably arranged on the walking beam, wherein the sliding seat is formed with an accommodating channel arranged toward the beam surface of the walking beam; A wheel seat, slidably disposed in the accommodating channel, and a rubber wheel is rotatably mounted on the wheel seat; A pressurized cylinder for driving the wheel seat to press the rubber wheel against the beam surface, installed between the wheel seat and the sliding seat; A pressure sensor for collecting the pressure value of the pressurized gas inside the pressurized cylinder, installed in the pressurized cylinder; An electric valve installed on the gas pipe of the pressurized cylinder; A controller is connected to the pressure sensor and the electric valve.

2. The automatic tensioning device for driving wheels of a segment crane according to claim 1, characterized in that: One end of the wheel seat is slidably disposed in the accommodating channel, and the other end of the wheel seat extends to the outside of the accommodating channel. Reaction plates are formed on opposite sides of the other end of the wheel seat, and the pressurizing cylinder is installed between the reaction plates and the sliding seat.

3. The automatic tensioning device for driving wheels of a segment crane according to claim 2, characterized in that: The sliding seat is formed with two limit plates, and the two limit plates are respectively arranged on the opposite sides of the accommodating channel. The limit plates are provided with guide holes, and the opposite sides of the other end of the wheel seat are formed with guide blocks, and the guide blocks are slidably arranged in the guide holes.

4. The automatic tensioning device for driving wheels of a segment crane according to claim 1, characterized in that: The sliding seat comprises: A base plate, the base plate is arranged opposite to the beam surface, the two opposite sides of the base plate are respectively connected with side plates, the two side plates respectively extend to the two opposite sides of the walking beam, the side of the walking beam is formed with a slide groove, and the accommodating channel is formed in the base plate; The guide wheel is rotatably mounted on the inner side of the side portion and slidably arranged in the slide groove.

5. The automatic tensioning device for driving wheels of a segment crane according to claim 1, characterized in that: A mounting groove is formed at one end of the wheel seat, the rubber wheel is rotatably arranged in the mounting groove, one side of the rubber wheel extends to the outside of the mounting groove, and both ends of the wheel axle of the rubber wheel are rotatably installed on two opposite groove walls of the mounting groove.

6. A tensioning method for the automatic tensioning device for driving wheels of a segment crane according to any one of claims 1 to 5, characterized in that: The following steps are involved: The controller controls the electric valve to input pressurized gas into the pressurized cylinder, and the telescopic end of the pressure cylinder extends out of the driving wheel seat to make the rubber wheel on the wheel seat press against the beam surface; The pressure sensor collects the pressure value of the pressure gas inside the pressurized cylinder in real time; The controller obtains the pressure value, and a pressure standard value is preset in the controller. When the pressure value is less than the pressure standard value, the controller controls the electric valve to input pressurized gas into the pressurized cylinder so that the pressure value is adapted to the pressure standard value.

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