A braking status monitoring device for a wet brake for lifting on an offshore platform

Abstract

This invention discloses a braking status monitoring device for a wet-type lifting brake on an offshore platform, comprising a brake body and a housing installed within the brake body. A lever sleeve is installed at the bottom of the housing, and a cylindrical pin is provided on the inner wall of the internal cavity of the lever sleeve. A lever extending to the housing is movably installed on the outer side of the cylindrical pin. A threaded connecting pipe is installed on one side of the housing, and a push fork is movably installed on the inner wall of the threaded connecting pipe. A return spring is installed at one end of the push fork, and an adjusting bolt is installed in the inner cavity of the threaded connecting pipe at the end away from the push fork. This invention changes the position of the displacement proximity switch on the brake from being built into the cavity to being external, reducing the impact of high temperature, lubricating oil, and metal impurities inside the cavity on the proximity switch, greatly improving the stability and accuracy of the displacement proximity switch's operation, and also significantly improving the accuracy of the brake status display.

Description

Technical Field

[0001] This invention belongs to the field of wet multi-plate hydraulic brakes, and in particular relates to a braking status monitoring device for a wet brake for lifting offshore platforms. Background Technology

[0002] Wet multi-disc hydraulic brakes use hydraulic pressure to drive or release the brake. The internal cavity uses lubricating oil for lubrication and heat dissipation. They are characterized by their compact structure, ease of automation, and long service life, and are widely used in numerous industrial fields. The wet brake for offshore platform lifting is a normally closed wet multi-disc hydraulic brake. When the hydraulic pressure is not connected, internal springs compress the spring disc, friction disc, and gear disc, converting pressure into friction force, generating braking torque. When the hydraulic pressure is connected, the hydraulic oil pushes the brake piston, which in turn pushes the spring disc, counteracting the spring compression force and eliminating the pressure between the friction disc and gear disc, thus releasing the brake. This type of brake is characterized by its small size, high torque, and sensitive response. Monitoring the braking status of the wet brake for offshore platform lifting is an important aspect and necessary guarantee for its normal operation. The braking status must be accurately, clearly, and conveniently fed back to the platform operators.

[0003] Currently, brake status feedback mostly uses electrical signals, that is, displacement proximity switches detect the displacement changes of internal parts during braking. However, this type of brake is compact in size and space is limited. Proximity switches with a slightly larger detection range cannot be installed in the brake cavity due to size constraints. Proximity switches that can be installed in the brake cavity have a shorter detection distance and require very precise positioning during installation, resulting in high parts processing costs and poor economic efficiency. Since the displacement proximity switch is installed inside the brake cavity, the high temperature, vibration, and oily environment make the proximity switch unstable and prone to false alarms and other malfunctions, posing a significant risk to platform operation. Poor sealing allows rainwater and sea vapor to easily enter the brake cavity and the proximity switch, causing brake damage or malfunction.

[0004] A braking status monitoring device for a marine platform lifting wet brake is provided to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a braking status monitoring device for a marine platform lifting wet brake. The device's working environment can be addressed by using an external displacement proximity switch, and the use of a lever method can solve the problem of insufficient displacement, thereby increasing the accuracy of the device in detecting the braking status.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] A braking status monitoring device for a wet-type lifting brake for an offshore platform includes a brake body and a housing installed within the brake body. A lever sleeve is installed at the bottom of the housing. A cylindrical pin is provided on the inner wall of the inner cavity of the lever sleeve. A lever extending to the housing is movably installed on the outer side of the cylindrical pin. A threaded connecting pipe is installed on one side of the housing. A push fork is movably installed on the inner wall of the threaded connecting pipe. A return spring is installed at one end of the push fork. An adjusting bolt is installed in the inner cavity of the threaded connecting pipe at the end of the return spring away from the push fork. A displacement proximity switch is fixedly installed on one side of the housing, and the detection end of the displacement proximity switch extends to one side of the lever.

[0008] Furthermore, an end cap is installed on the top of the housing by fixing bolts, and a rubber sealing gasket is provided at the connection between the end cap and the housing.

[0009] Furthermore, the bottom of the lever sleeve is mounted to the brake body via an internal hex bolt.

[0010] Furthermore, the housing and the lever sleeve are installed by connecting bolts, and a non-asbestos paper gasket is filled between the housing and the lever sleeve.

[0011] Furthermore, the outer side of the lever sleeve is provided with a through hole for use with the lever.

[0012] The present invention has the following beneficial effects:

[0013] This invention changes the position of the displacement proximity switch on the brake from being built into the cavity to being external, reducing the impact of high temperature, lubricating oil, and metal impurities inside the cavity on the proximity switch. This greatly improves the stability and accuracy of the displacement proximity switch's operation and significantly enhances the accuracy of the brake's braking status display. By amplifying the displacement through the lever principle, a displacement proximity switch with a larger range can be selected, reducing the selection requirements for the proximity switch and improving the accuracy of brake status detection. The external proximity switch also reduces the dimensional accuracy requirements for the brake housing, improving the yield rate and economy of the machining process.

[0014] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] In the diagram: 1. Adjusting bolt; 2. Return spring; 3. Threaded connecting pipe; 4. Push fork; 5. Displacement proximity switch; 6. Fixing bolt; 7. End cap; 8. Rubber sealing gasket; 9. Housing; 10. Connecting bolt; 11. Non-asbestos paper gasket; 12. Lever sleeve; 13. Socket headstock bolt; 14. Cylindrical pin; 15. Lever. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", "side", "end", "bottom", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0020] Example: Figure 1 As shown, a braking status monitoring device for a wet-type lifting brake on an offshore platform includes a brake body and a housing 9 installed within the brake body. A lever sleeve 12 is installed at the bottom of the housing 9. A cylindrical pin 14 is provided on the inner wall of the internal cavity of the lever sleeve 12. A lever 15 extending to the housing 9 is movably installed on the outer side of the cylindrical pin 14. The lever 15 can move around the cylindrical pin 14 as a fulcrum. The shape of the lever 15 can be changed according to actual needs, altering the lever's magnification ratio to adapt to different equipment. The parts that the lever 15 contacts inside the brake can be different parts, such as the brake body. Piston, pressure plate, spring plate, etc., are installed on one side of the housing 9 with a threaded connecting pipe 3. A push fork 4 is movably installed on the inner wall of the threaded connecting pipe 3. A return spring 2 is installed on one end of the push fork 4. An adjusting bolt 1 is installed in the inner cavity of the threaded connecting pipe 3 at the end of the return spring 2 away from the push fork 4. The threaded connecting pipe 3 allows the adjusting bolt 1 to rotate in the middle to adjust the depth of the adjusting bolt 1. A displacement proximity switch 5 is fixedly installed on one side of the housing 9. The displacement proximity switch 5 can be rotated to replace different types, and the detection end of the displacement proximity switch 5 extends to one side of the lever 15 to detect the displacement of the lever 15.

[0021] An end cover 7 is installed on the top of the housing 9 by fixing bolts 6. The end cover 7 can be opened to facilitate personnel to maintain and repair the device. A rubber sealing gasket 8 is provided at the connection between the end cover 7 and the housing 9. The rubber sealing gasket 8 increases the sealing performance of the device and is kept away from heat sources to avoid the problem of rubber gasket aging.

[0022] The bottom of the lever sleeve 12 is installed to the brake body by an internal hex bolt 13;

[0023] The housing 9 and the lever sleeve 12 are installed by connecting bolts 10. A non-asbestos paper gasket 11 is filled between the housing 9 and the lever sleeve 12. Since it is relatively close to the brake, some heat will still be conducted, so the rubber gasket is replaced with a non-asbestos paper gasket 11.

[0024] Workflow: 1. When in use, lever 15, cylindrical pin 14 and lever sleeve 12 are assembled and fixed on the brake cavity. Lever 15 contacts the horizontally axially moving parts inside the brake. Then, the cylindrical pin is used as the lever fulcrum. The ratio of the lengths of the two parts of the lever is the ratio of the brake displacement amplification. Displacement proximity switch 5 detects the displacement of the lever. It is used to detect the proportionally amplified lever movement and convert the position status into an electrical signal output of the switch quantity.

[0025] 2. When adjustment is required, the adjusting bolt 1 can be rotated to make the return spring 2 press the push fork 4. The adjusting bolt 1 supports the return spring 2. The return spring 2 is used to fix the position of the push fork 4 so that the push fork 4 can hold the lever 15 and prevent the lever 15 from transmitting incorrect signals. When the internal parts of the brake return to their original position and move away from the lever 15, the return spring 2 pushes the push fork 4 and then pushes the lever away from the displacement proximity switch 5.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The preferred embodiments of the present invention disclosed above are only for the purpose of illustrating the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A braking status monitoring device for a wet brake for lifting offshore platforms, comprising a brake body and a housing (9) installed within the brake body, characterized in that, A lever sleeve (12) is installed at the bottom of the housing (9). A cylindrical pin (14) is provided on the inner wall of the cavity of the lever sleeve (12). A lever (15) extending to the housing (9) is movably installed on the outer side of the cylindrical pin (14). A threaded connecting pipe (3) is installed on one side of the housing (9). A push fork (4) is movably installed on the inner wall of the threaded connecting pipe (3). A return spring (2) is installed at one end of the push fork (4). An adjusting bolt (1) is installed in the inner cavity of the threaded connecting pipe (3) at the end of the return spring (2) away from the push fork (4). A displacement proximity switch (5) is fixedly installed on one side of the housing (9), and the detection end of the displacement proximity switch (5) extends to one side of the lever (15). An end cap (7) is installed on the top of the housing (9) by fixing bolts (6), and a rubber sealing gasket (8) is provided at the connection between the end cap (7) and the housing (9); The bottom of the lever sleeve (12) is installed to the brake body by an internal hex bolt (13); The housing (9) and the lever sleeve (12) are installed by connecting bolts (10), and a non-asbestos paper pad (11) is filled between the housing (9) and the lever sleeve (12).

2. A braking status monitoring device for a marine platform lifting wet brake according to claim 1, characterized in that, The lever sleeve (12) has a through hole on its outer side for use with the lever (15).

Images