A fixed pulley block with drilling tool position detection and tension detection functions

Abstract

A fixed pulley block with drill bit position detection and tension detection functions includes a frame, which includes a base plate and ear plates. The pulley block is mounted on the base plate, and a rotary encoder is mounted on the frame. A gear set is installed between the pulley block and the rotary encoder, and the rotary encoder is communicatively connected to a control system. The ends of the two ear plates furthest from the weighing support plate are hinged to one end of a pressure block via a first pin. The end of the pressure block furthest from the first pin is connected to a collar for fixing the non-moving end of a wire rope via a second pin. A pressure sensor is located between the middle of the pressure block and the weighing support plate. When the non-moving end of the wire rope is subjected to force, the pressure block is driven to rotate around the hinge point, causing the force to act on the pressure sensor. The pressure sensor transmits an electrical signal to the control system to detect the tension of the wire rope. This invention enables real-time detection of the drill bit position and wire rope tension while ensuring the normal operation of the pulley block, thereby improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of equipment for hydraulic coke cutting lifting systems in delayed coking in the petroleum refining industry, and in particular to a fixed pulley block with drill bit position detection and tension detection functions. Background Technology

[0002] In existing hydraulic decoking systems of delayed coking units in the petrochemical industry, the drilling rig winch controls the vertical movement of the drilling equipment via a wire rope to achieve the decoking function. The wire rope between the drilling rig winch and the drilling equipment requires guide pulley blocks, fixed pulley blocks, and floating pulley blocks for fixation and displacement transmission. During the decoking process, real-time position detection of the drilling equipment and tension detection of the wire rope are necessary. The detection equipment is generally integrated into a platform between the drilling rig winch platform and the guide pulley platform, or a separate displacement detection device can be placed on the intermediate platform, and a separate tension detection device can be placed on the drilling rig winch platform. The integrated detection equipment on the intermediate platform mainly consists of pulley blocks, inductive sensors, and pressure sensors. In newly built delayed coking units, a separate platform is generally required on the derrick to install the detection equipment. Adding an installation platform undoubtedly impacts the overall cost and structural strength calculation of the entire unit. If the delayed coking unit does not have a corresponding installation platform, the equipment cannot be used. The pulley blocks of the detection device are equipped with sensing blocks, and the electric... When the inductive sensor and sensing block move to the working gap, they generate a current signal, which is sent to the control system. The control system then calculates the real-time position of the drill bit. However, inductive sensors can experience problems such as low accuracy, insensitive signals, and signal loss during operation. Similarly, the detection device installed on the intermediate platform can also experience insensitive and inaccurate signals when detecting wire rope tension, and may also experience wire rope loosening and derailment, or overload. A separate tension detection device installed on the drilling rig winch platform requires a longer wire rope and more pulleys to return the non-moving end of the wire rope to the drilling rig winch platform. This increases the length of the wire rope and the number of pulleys, making it easier for the wire rope to loosen and derail during operation, causing the entire system to malfunction.

[0003] Therefore, it is essential to improve the structure of existing pulley block equipment in delayed coking units so that it can safely, efficiently, sensitively, and accurately detect the position of drill bits while fulfilling the functions of the pulley block. This is crucial for improving production safety and efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a fixed pulley group with drill bit position detection and tension detection functions. It can realize real-time detection of drill bit position and wire rope tension under the premise of normal operation of the pulley group. At the same time, it can effectively avoid the occurrence of low detection signal accuracy, insensitivity, signal loss and wire rope loosening and derailment. It can also save a set of pulley equipment, reduce usage restrictions, and eliminate the need to set up a separate installation platform.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a fixed pulley block with drill bit position detection and tension detection functions, including a frame, a pulley block for operating a wire rope, a rotary encoder for drill bit position detection, and a pressure sensor for detecting the tension of the wire rope. The frame includes a base plate, with several first upright plates vertically arranged on one side of the base plate. A weighing support plate is provided on the first upright plate, and two ear plates are vertically arranged on one side of the upper surface of the weighing support plate. The pulley block is mounted on the base plate, and the rotary encoder is mounted on the frame. A gear set is installed between the plates, and the rotary encoder and pressure sensor are communicatively connected to the control system. The ends of the two ear plates away from the weighing support plate are hinged to one end of the pressure block via a first pin. The end of the pressure block away from the first pin is connected to a collar for fixing the non-moving end of the wire rope via a second pin. The pressure sensor is located between the middle of the pressure block and the weighing support plate. When the non-moving end of the wire rope is subjected to force, the pressure block is driven to rotate around the hinge point, so that the force is applied to the pressure sensor. The pressure sensor transmits an electrical signal to the control system to detect the tension of the wire rope.

[0006] As a preferred embodiment, the base plate is further provided with several uniformly symmetrical second upright plates, which form a square frame. A pulley shaft is vertically provided on the square frame, and a bearing is sleeved on the pulley shaft. The pulley assembly is rotatably mounted on the pulley shaft through the bearing.

[0007] As a preferred embodiment, both ends of the pulley shaft are also provided with locking nuts for fixing the pulley assembly to the second vertical plate.

[0008] As a preferred embodiment, the gear set includes a large gear and a small gear that mesh with each other. The large gear is mounted on the axle of the pulley assembly, and the small gear is mounted on the output shaft of the rotary encoder.

[0009] As a preferred embodiment, the rotary encoder is vertically mounted on the second upright plate of the frame via a bracket. There are several rotary encoders, and the number of brackets and pinions corresponds to the number of rotary encoders, and they are all located on the same side of the frame.

[0010] As a preferred embodiment, the bracket is also provided with several encoder protective covers for protecting the rotary encoder.

[0011] As a preferred embodiment, the base plate is also provided with a pulley block protective cover for protecting the pulley block.

[0012] As a preferred embodiment, the weighing support plate is also provided with a sensor protective cover for protecting the pressure sensor.

[0013] Based on the above technical solution, the beneficial effects of this utility model are:

[0014] This utility model discloses a fixed pulley block with drill bit position detection and tension detection functions. It integrates three devices—drill bit position detection device, tension detection device, and fixed pulley block—into a single functional fixed pulley block. This allows for real-time detection of the drill bit position and wire rope tension while the pulley block functions normally, making the overall structure of the hydraulic decoking lifting system more compact, streamlined, and efficient.

[0015] From a system operation perspective, while effectively ensuring the normal operation of the hydraulic decoking system, it can better avoid phenomena such as low detection signal accuracy, insensitivity, signal loss, and wire rope loosening and derailment. It also saves on a set of pulley equipment, reducing usage limitations and eliminating the need for a separate installation platform. The device boasts high overall safety and reliability, good sensitivity and accuracy, effectively improving production efficiency and operational safety while reducing production costs. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention;

[0017] Figure 2 for Figure 1 Sectional view of plane AA.

[0018] The markings in the diagram are as follows: 1. Frame; 101. Base plate; 102. First upright plate; 103. Weighing support plate; 104. Ear plate; 105. Second upright plate; 2. Pulley block; 3. Large gear; 4. Small gear; 5. Rotary encoder; 6. Pressure block; 7. Pressure sensor; 8. Bracket; 9. Encoder protective cover; 10. Pulley shaft; 11. Bearing; 12. First pin; 13. Collar; 14. Pulley block protective cover; 15. Sensor protective cover; 16. Second pin. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] It should also be noted that, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "front end," "rear end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0022] like Figure 1 and Figure 2 As shown, a fixed pulley block with drill position detection and tension detection functions includes a frame 1, a pulley block 2 for running a wire rope, a large gear 3, a small gear 4, a rotary encoder 5 for drill position detection, a pressure block 6, a pressure sensor 7 for detecting the tension of the wire rope, a bracket 8, an encoder protective cover 9, a pulley shaft 10, a bearing 11, a first pin 12, a collar 13, a pulley block protective cover 14, a sensor protective cover 15, and a second pin 16.

[0023] In this embodiment, the frame includes a base plate 101, a first upright plate 102, a weighing support plate 103, ear plates 104, and a second upright plate 105. Several first upright plates 102 are vertically arranged on one side of the base plate 101, and the several first upright plates 102 form a square frame. The weighing support plate 103 is mounted on the square frame, and two ear plates 104 are vertically arranged on one side of the upper end face of the weighing support plate 103.

[0024] The base plate 101 is further provided with several uniformly symmetrical second upright plates 105, which form a square frame. Holes are opened in the front and rear second upright plates 105. The pulley shaft 10 is mounted on the second upright plate 105 through two holes. Bearings 11 are fitted onto the pulley shaft 10. The pulley assembly 2 is rotatably mounted on the pulley shaft 10 via the bearings 11, allowing the pulley assembly 2 to operate normally, guide the wire rope, and increase the lifting force of the system. In this embodiment, locking nuts are also provided at both ends of the pulley shaft 10 for fixing the pulley assembly 2 onto the second upright plates 105.

[0025] The rotary encoder 5 is vertically bolted to the second upright plate 105 of the frame 1 via a bracket 8. There are several rotary encoders 5. The number of brackets 8 and pinions 4 corresponds to the number of rotary encoders 5, and they are all set on the same side of the frame 1. The brackets 8 are also equipped with several encoder protective covers 9 for protecting the rotary encoders 5.

[0026] A gear set is installed between the pulley block 2 and the rotary encoder 5. The gear set includes a large gear 3 and a small gear 4 that mesh with each other. The large gear 3 is mounted on the axle of the pulley block 2, and the small gear 4 is mounted on the output shaft of the rotary encoder 5. The pulley block 2 transmits mechanical displacement to the rotary encoder 5 through the gear set. The rotary encoder 5 converts the mechanical displacement into an electrical signal and transmits it to the control system to detect the position of the drill bit. The frame 1 is also equipped with a pulley block protective cover 14 to protect the pulley block 2.

[0027] The two ear plates 104 have symmetrical coaxial mounting holes at their ends away from the weighing support plate 103. The pressure block 6 has through holes at both ends. The first pin 12 passes through the mounting hole on one ear plate, the through hole at the end of the pressure block 6, and the mounting hole on the other ear plate, forming a hinge structure. This allows one end of the pressure block 6 to rotate around the first pin 12 between the ear plates 104. The other end of the pressure block 6, the end away from the first pin 12, is connected to a collar 13 via a second pin 16. The collar 13 is used to fix the non-moving end of the wire rope. The pressure sensor 7 is vertically mounted on the force transmission path between the middle of the pressure block 6 and the weighing support plate 103. When the non-moving end of the wire rope is subjected to force, it drives the pressure block 6 to rotate around the hinge point, causing the force to act on the pressure sensor 7. The pressure sensor 7 transmits an electrical signal to the control system via a wire to detect the tension of the wire rope. The weighing support plate 103 is also provided with a sensor protective cover 15 for protecting the pressure sensor 7. In this embodiment, the sensor protective cover 15 is fixed to the weighing support plate 103 by bolts.

[0028] In this embodiment, the rotary encoder 5 and the pressure sensor 7 are communicatively connected to the control system; specifically, the control system is existing technology and will not be described in detail in this embodiment.

[0029] In use, the non-moving end of the wire rope is connected to the collar 13. When the wire rope is under stress, it causes one end of the pressure block 6 to descend, applying force to the pressure sensor 7. The pressure sensor 7 transmits an electrical signal to the control system via a wire, thereby detecting the tension in the wire rope. Simultaneously, the wire rope drives the pulley block 2 to rotate. The pulley block 2 transmits the mechanical displacement of the wire rope to the rotary encoder 5 via the large gear 3 and the small gear 4. The rotary encoder 5 converts the mechanical displacement into an electrical signal, which is then transmitted to the control system via a wire, thus enabling real-time detection of the drill bit's position.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, but the protection scope of this utility model is not limited thereto. Any modifications or equivalent substitutions made by those skilled in the art within the technical scope disclosed in this utility model should be covered within the protection scope of this utility model.

Claims

1. A fixed pulley block with drill bit position detection and tension detection functions, characterized in that: The device includes a frame (1), a pulley block (2) for operating the wire rope, a rotary encoder (5) for detecting the position of the drill bit, and a pressure sensor (7) for detecting the tension of the wire rope. The frame includes a base plate (101), and several first upright plates (102) are vertically arranged on one side of the base plate (101). A weighing support plate (103) is provided on the first upright plate (102), and two ear plates (104) are vertically arranged on one side of the upper end face of the weighing support plate (103). The pulley assembly (2) is mounted on the base plate (101), the rotary encoder (5) is mounted on the frame (1), a gear set is installed between the pulley assembly (2) and the rotary encoder (5), and the rotary encoder (5) is connected to the control system in communication. The two ear plates (104) are connected to the end of the pressure block (6) via the first pin (12) to form a hinge structure. The end of the pressure block (6) away from the first pin (12) is connected to the collar (13) for fixing the non-moving end of the wire rope via the second pin (16). The pressure sensor (7) is located between the middle of the pressure block (6) and the weighing support plate (103). When the non-moving end of the wire rope is subjected to force, the pressure block (6) is driven to rotate around the hinge point, so that the force is applied to the pressure sensor (7). The pressure sensor (7) transmits the electrical signal to the control system to realize the detection of the tension of the wire rope.

2. A fixed pulley block with drill bit position detection and tension detection functions according to claim 1, characterized in that: The base plate (101) is also provided with several uniformly symmetrical second upright plates (105), which form a square frame. A pulley shaft (10) is vertically provided on the square frame. A bearing (11) is sleeved on the pulley shaft (10). The pulley group (2) is rotatably mounted on the pulley shaft (10) through the bearing (11).

3. A fixed pulley block with drill bit position detection and tension detection functions according to claim 2, characterized in that: The two ends of the pulley shaft (10) are also provided with locking nuts for fixing the pulley assembly (2) on the second vertical plate (105).

4. A fixed pulley block with drill bit position detection and tension detection functions according to claim 1, characterized in that: The gear set includes a large gear (3) and a small gear (4) that mesh with each other. The large gear (3) is mounted on the axle of the pulley set (2), and the small gear (4) is mounted on the output shaft of the rotary encoder (5).

5. A fixed pulley block with drill bit position detection and tension detection functions according to claim 4, characterized in that: The rotary encoder (5) is vertically mounted on the second upright plate (105) of the frame (1) via a bracket (8). There are several rotary encoders (5). The number of brackets (8) and pinions (4) corresponds to the number of rotary encoders (5), and they are all located on the same side of the frame (1).

6. A fixed pulley block with drill bit position detection and tension detection functions according to claim 5, characterized in that: The bracket (8) is also provided with several encoder protective covers (9) for protecting the rotary encoder (5).

7. A fixed pulley block with drill bit position detection and tension detection functions according to claim 1, characterized in that: The base plate (101) is also provided with a pulley block protective cover (14) for protecting the pulley block (2).

8. A fixed pulley block with drill bit position detection and tension detection functions according to claim 1, characterized in that: The weighing support plate (103) is also provided with a sensor protective cover (15) for protecting the pressure sensor (7).

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