A real-time monitoring device for the piston rod stroke of a ram preventer
Patent Information
- Application Number
- CN202510301866.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-09-15
Smart Images
Figure CN122751960A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hydraulic cylinder monitoring devices, and in particular to a real-time monitoring device for the piston rod stroke of a gate blowout preventer. Background Technology
[0002] The new real-time hydraulic cylinder position monitoring device is a device used to monitor the precise position of the blowout preventer gate. It is an important means of judging the operating status of the blowout preventer, and can provide real-time position information of the blowout preventer gate to help operators judge whether the drill pipe has been completely cut off, and also facilitates the early implementation of preventive measures to prevent potential dangers.
[0003] However, in existing technologies, the monitoring device is usually installed inside the end plate mounted outside the liquid cylinder. This makes it inconvenient to disassemble and repair the monitoring device in the long term, and the installation is also inconvenient. If the monitoring device is damaged, the entire end plate and the monitoring device must be replaced. Summary of the Invention
[0004] In view of this, the present invention provides a real-time monitoring device for the piston rod stroke of a gate blowout preventer. The main technical problem to be solved is to facilitate the disassembly and assembly of the monitoring equipment inside the monitoring device so as to enable regular maintenance of the monitoring equipment.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a real-time monitoring device for the piston rod stroke of a blowout preventer, comprising a hydraulic cylinder body, a front end plate slidably connected to the outer wall of the hydraulic cylinder body, a disassembly assembly provided inside the front end plate, the disassembly assembly including a clamping block, a sliding rod one fixedly connected to the outer wall of the clamping block, a sliding rod two fixedly connected to the outer wall of the clamping block, the sliding rod one and the sliding rod two slidably connected inside the front end plate, the clamping block being disposed on the outer wall of the front end plate, a threaded rod rotatably connected inside the clamping block, the threaded rod being threadedly connected to the inside of the front end plate, a knob fixedly connected to the outer wall of the threaded rod, a slot being provided inside the clamping block, a connecting plate slidably connected inside the slot, a laser sensor being provided on the outer wall of the connecting plate; a fixing sleeve being fixedly connected inside the front end plate, a piston rod being slidably fitted inside the fixing sleeve, and the output end of the hydraulic cylinder body being fixedly connected to the rear end of the piston rod.
[0006] By adopting the above technical solution, the laser sensor is installed on the outer wall of the connecting plate, and the connecting plate is clamped inside the two sets of disassembly and assembly components. The two sets of disassembly and assembly components are used to clamp and fix the connecting plate, thereby achieving the effect of easy disassembly and assembly of the laser sensor.
[0007] As a further description of the above technical solution: the disassembly and assembly components are provided in two sets, and the two sets of disassembly and assembly components are respectively arranged on the inner sides of the front end plate. The connecting plate and the laser sensor are fixed together by screws.
[0008] By adopting the above technical solution, the connecting plate and the laser sensor are fixedly connected by screws.
[0009] As a further description of the above technical solution: it also includes a processing unit and a display unit. The laser sensor is a TOF type laser rangefinder. A positioning shaft one is fixedly connected to the outer wall of the piston rod, and a positioning shaft two is fixedly connected to the outer wall of the piston rod. Both positioning shaft one and positioning shaft two are located on the side of the outer wall of the piston rod facing the laser sensor. The distance between positioning shaft one and the rear end of the piston rod is greater than the distance between positioning shaft two and the rear end of the piston rod. The height of positioning shaft one protruding from the outer wall of the piston rod is different from the height of positioning shaft two protruding from the outer wall of the piston rod. The distance between the outer wall of the piston rod and the receiver of the laser sensor is H1. When positioning shaft one moves to the position of the monitoring hole, the distance between the end face of the protruding end of positioning shaft one and the receiver of the laser sensor is H2. When positioning shaft two moves to the position of the monitoring hole, the distance between the end face of the protruding end of positioning shaft two is H2. The distance between the laser sensor and its receiver is H3. The laser sensor outputs an electrical signal representing the measured distance. The processing unit converts the electrical signal into a measured distance and compares it with preset values H1, H2, and H3. When the measured distance equals H1, the processing unit outputs a first signal to the display unit indicating that both positioning axes 1 and 2 are not in position. The display unit then displays a first prompt message indicating that both positioning axes 1 and 2 are not in position based on the first signal. When the measured distance equals H2, the processing unit outputs a second signal to the display unit indicating that positioning axis 1 is in position. The display unit then displays a second prompt message indicating that positioning axis 1 is in position based on the second signal. When the measured distance equals H3, the processing unit outputs a third signal to the display unit indicating that positioning axis 2 is in position. The display unit then displays a third prompt message indicating that positioning axis 2 is in position based on the third signal.
[0010] By adopting the above technical solution, the piston rod is limited to slide inside the fixed sleeve, and positioning shaft one and positioning shaft two facilitate auxiliary position monitoring.
[0011] As a further description of the above technical solution: a mounting plate is installed at the front end of the piston rod, a rear end plate is slidably connected to the outer wall of the hydraulic cylinder body, and a bolt rod is slidably connected inside the rear end plate.
[0012] By adopting the above technical solution, the mounting plate is installed at the front end of the piston rod by means of a threaded connection, which facilitates the connection with the blowout preventer gate.
[0013] As a further description of the above technical solution: four bolt rods are provided, the bolt rods are slidably connected inside the front end plate, and nuts are threaded to both ends of the bolt rods.
[0014] By adopting the above technical solution, the front plate and the rear plate are connected by four bolts, and the hydraulic cylinder body is installed and fixed between the front plate and the rear plate, and then secured with nuts.
[0015] As a further description of the above technical solution: the height of the first positioning shaft protruding from the outer wall of the piston rod is greater than the height of the second positioning shaft protruding from the outer wall of the piston rod, or the height of the first positioning shaft protruding from the outer wall of the piston rod is less than the height of the second positioning shaft protruding from the outer wall of the piston rod.
[0016] By adopting the above technical solution, the different distances between positioning shaft one and positioning shaft two and the piston rod facilitate the differentiation and monitoring of positioning shaft one and positioning shaft two.
[0017] By employing the above technical solution, the present invention provides a real-time monitoring device for the piston rod stroke of a gate blowout preventer, which has at least the following beneficial effects: 1. Compared with the prior art, the real-time monitoring device for the piston rod stroke of the gate blowout preventer fixes the laser sensor to the connecting plate, places the connecting plate between two slots, and rotates two knobs to drive the threaded rod to rotate, causing the two clamping blocks to slide close together to clamp and fix the connecting plate, which facilitates the disassembly and assembly of the laser sensor for regular maintenance in the future.
[0018] 2. Compared with the prior art, this real-time monitoring device for the piston rod stroke of a blowout preventer uses a hydraulic cylinder to drive the piston rod to slide and extend. During the sliding and extension of the piston rod, the positioning shaft one and positioning shaft two are displaced. A laser sensor is used to monitor the positioning of positioning shaft one and positioning shaft two through a monitoring hole. The operator can monitor the movement position of the blowout preventer gate by displaying the first, second, or third prompt information on the display unit. Attached Figure Description
[0019] Figure 1 This is an overall structural diagram of a real-time monitoring device for the piston rod stroke of a gate blowout preventer proposed in this invention; Figure 2 This is a structural diagram of the front-end plate of a real-time monitoring device for the piston rod stroke of a gate blowout preventer proposed in this invention; Figure 3 This is a piston rod structure diagram of a real-time monitoring device for the piston rod stroke of a gate blowout preventer proposed in this invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5This is a schematic diagram of the electrical connection structure of a real-time monitoring device for the piston rod stroke of a gate blowout preventer proposed in this invention.
[0020] Legend: 1. Cylinder body; 2. Front end plate; 3. Clamping block; 4. Slide rod one; 5. Slide rod two; 6. Threaded rod; 7. Knob; 8. Slot; 9. Connecting plate; 10. Laser sensor; 11. Fixing sleeve; 12. Piston rod; 13. Positioning shaft one; 14. Positioning shaft two; 15. Monitoring hole; 16. Mounting plate; 17. Rear end plate; 18. Bolt rod; 19. Nut. Detailed Implementation
[0021] Example 1 Reference Figure 1-5 The present invention provides a real-time monitoring device for the piston rod stroke of a gate blowout preventer: It includes a hydraulic cylinder body 1, a front end plate 2 slidably connected to the outer wall of the hydraulic cylinder body 1, and a disassembly assembly inside the front end plate 2. The disassembly assembly includes a clamping block 3, a sliding rod 4 fixedly connected to the outer wall of the clamping block 3, and a sliding rod 5 fixedly connected to the outer wall of the clamping block 3. The sliding rods 4 and 5 are slidably connected inside the front end plate 2 and are limited to sliding within the front end plate 2. The clamping block 3 is disposed on the outer wall of the front end plate 2, and a threaded rod 6 is rotatably connected inside the clamping block 3. The threaded rod 6 is limited to rotating within the clamping block 3. A knob 7 is fixedly connected to the outer wall of the threaded rod 6 inside the front plate 2. A slot 8 is opened inside the clamping block 3. A connecting plate 9 is slidably connected inside the slot 8. The slot 8 is used to limit the position of the connecting plate 9. A laser sensor 10 is provided on the outer wall of the connecting plate 9. Two sets of disassembly and assembly components are provided. The two sets of disassembly and assembly components are respectively located on both sides inside the front plate 2. The connecting plate 9 and the laser sensor 10 are fixed together by screws. A fixing sleeve 11 is fixedly connected inside the front plate 2. A piston rod 12 is slidably fitted inside the fixing sleeve 11. The output end of the hydraulic cylinder body 1 is fixedly connected to the rear end of the piston rod 12.
[0022] Example 2 In this embodiment, based on Embodiment 1, a processing unit and a display unit are further included. The laser sensor 10 is a TOF type laser rangefinder. A positioning shaft 13 and a positioning shaft 14 are fixedly connected to the outer wall of the piston rod 12. Both positioning shafts 13 and 14 are located on the side of the outer wall of the piston rod 12 facing the laser sensor 10. The distance between positioning shaft 13 and the rear end of the piston rod 12 is greater than the distance between positioning shaft 14 and the rear end of the piston rod 12. Positioning shafts 13 and 14 are used to assist the laser sensor 10 in positioning and monitoring. The height of positioning shaft 13 protruding from the outer wall of the piston rod 12 is different from the height of positioning shaft 14 protruding from the outer wall of the piston rod 12. For example, the height of positioning shaft 13 protruding from the outer wall of the piston rod 12 is greater than that of positioning shaft 14. The height of the protrusion 14 on the outer wall of the piston rod 12 is also different from that of the positioning shaft 13. The height of the protrusion 14 on the outer wall of the piston rod 12 is less than that of the positioning shaft 14. The front plate 2 has a monitoring hole 15 inside. The laser emitting end and receiving end of the laser sensor 10 are aligned with the monitoring hole 15. The front end of the piston rod 12 is equipped with a mounting plate 16. The mounting plate 16 is threadedly connected to the inside of the piston rod 12. Then, the blowout preventer gate is connected to the blowout preventer gate and the piston rod 12. The outer wall of the cylinder body 1 is slidably connected with a rear end plate 17. The cylinder body 1 is connected to the front end plate 2 and the rear end plate 17. The rear end plate 17 is slidably connected with bolt rods 18. There are four bolt rods 18. The bolt rods 18 are slidably connected to the inside of the front end plate 2. Nuts 19 are threadedly connected to both ends of the bolt rods 18.
[0023] The distance between the outer wall of the piston rod 12 and the receiver of the laser sensor 10 is H1; when the positioning shaft 13 moves to the position of the monitoring hole 15, the distance between the end face of the protruding end of the positioning shaft 13 and the receiver of the laser sensor 10 is H2; when the positioning shaft 14 moves to the position of the monitoring hole 15, the distance between the end face of the protruding end of the positioning shaft 14 and the receiver of the laser sensor 10 is H3.
[0024] The processing unit can be a CPU, PLC, etc., and the display unit can be a monitor or other known device that can display text or symbols.
[0025] Working principle: In use, firstly, the cylinder body 1 drives the piston rod 12 through the front end plate 2 and the fixing sleeve 11, placing the cylinder body 1 between the front end plate 2 and the rear end plate 17. The front end plate 2 and the rear end plate 17 are connected by four bolt rods 18. Then, multiple nuts 19 are installed at both ends of the four bolt rods 18 to limit and fix the cylinder body 1 between the front end plate 2 and the rear end plate 17. Next, the mounting plate 16 is threaded into the inside of the piston rod 12, and the mounting plate 16 is installed and fixed to the blowout preventer gate. Then, the connecting plate 9 and the laser sensor 10 are installed and fixed together using screws, and the connecting plate 9 is placed between the two clamping blocks 3. The connecting plate 9 is positioned between the slots 8 inside the clamping block 3. Rotating the knobs 7 on both sides rotates the threaded rod 6. As the threaded rod 6 rotates, it slides inwards towards the front plate 2, causing the clamping block 3 to slide towards the center of the front plate 2. This secures the connecting plate 9 and the laser sensor 10 to the outer wall of the front plate 2, aligning the laser emitting end of the laser sensor 10 with the center point of the monitoring hole 15. This facilitates the installation of the laser sensor 10. When the laser sensor 10 needs to be disassembled for maintenance, simply rotate the knobs 7 to rotate the threaded rod 6 in the opposite direction and slide the clamping block 3 outwards. At this time, the connecting plate 9 can disengage from the slots 8. This allows the connecting plate 9 and laser sensor 10 to be removed for maintenance, facilitating disassembly. The laser sensor 10 is then connected to the monitoring and warning devices. During operation of the cylinder body 1, the piston rod 12 slides and extends, causing the mounting plate 16 and the blowout preventer gate to operate. During this sliding and extending process, the piston rod 12 moves the positioning shafts 13 and 14. The laser sensor 10 emits a laser beam, which is reflected after hitting the outer wall of the piston rod 12, the end face of the protruding end of the positioning shaft 13, or the end face of the protruding end of the positioning shaft 14. When the reflected laser beam is detected by the laser sensor 10... After receiving the signal from the internal receiver, the laser sensor 10 outputs an electrical signal representing the measured distance. Since the height of the protrusion of the first positioning shaft 13 on the outer wall of the piston rod 12 is different from the height of the protrusion of the second positioning shaft 14 on the outer wall of the piston rod 12, the measured distances are different. This allows the system to determine whether the first positioning shaft 13 or the second positioning shaft 14 has moved to the position of the monitoring hole 15. If the measured distance indicates that the first positioning shaft 13 has moved to the position of the monitoring hole 15, it means that the piston rod 12 has not moved into place. If the measured distance indicates that the second positioning shaft 14 has moved to the position of the monitoring hole 15, it means that the piston rod 12 has moved into place.Specifically, the laser sensor 10 outputs an electrical signal representing the measured distance. The processing unit converts the electrical signal into a measured distance and compares it with preset values H1, H2, and H3 respectively. When the measured distance equals H1, the processing unit outputs a first signal to the display unit indicating that neither positioning axis 13 nor positioning axis 14 is in position. The display unit displays a first prompt message indicating that neither positioning axis 13 nor positioning axis 14 is in position based on the first signal. When the measured distance equals H2, the processing unit outputs a second signal to the display unit indicating that positioning axis 13 is in position. The display unit displays a second prompt message indicating that positioning axis 13 is in position based on the second signal. When the measured distance equals H3, the processing unit outputs a third signal to the display unit indicating that positioning axis 14 is in position. The display unit displays a third prompt message indicating that positioning axis 14 is in position based on the third signal. Based on the first, second, or third prompt information, the operator can determine the positional movement of the piston rod 12, assisting in monitoring the movement of the blowout preventer gate. This facilitates the assessment of the blowout preventer's operating status and whether the drill rod has been completely cut off (when the display unit shows the first or second prompt information, it indicates that the piston rod 12 has not moved to its position, thus indicating that the drill rod has not been cut off or has not been completely cut off; when the display unit shows the third prompt information, it indicates that the piston rod 12 has moved to its position, thus indicating that the drill rod has been completely cut off). It also facilitates taking preventative measures in advance to prevent potential hazards. The first, second, and third prompt information can be text, symbols, etc. The aforementioned "positioning shaft 13 and positioning shaft 14 are not in position" means that neither positioning shaft 13 nor positioning shaft 14 has moved to the position of the monitoring hole 15. "Positioning shaft 13 in position" means that positioning shaft 13 has moved to the position of the monitoring hole 15, and "positioning shaft 14 in position" means that positioning shaft 14 has moved to the position of the monitoring hole 15.
[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A ram preventer piston rod stroke real-time monitoring device, comprising a hydraulic cylinder body (1), characterized in that: The outer wall of the hydraulic cylinder body (1) is slidably connected to a front end plate (2). The front end plate (2) is internally equipped with a disassembly assembly, which includes a clamping block (3). A sliding rod (4) is fixedly connected to the outer wall of the clamping block (3), and a sliding rod (5) is fixedly connected to the outer wall of the clamping block (3). The sliding rod (4) and the sliding rod (5) are slidably connected inside the front end plate (2). The clamping block (3) is located on the outer wall of the front end plate (2). A threaded rod (6) is rotatably connected inside the clamping block (3). 6) The threaded connection is inside the front end plate (2), and the outer wall of the threaded rod (6) is fixedly connected to a knob (7). The inside of the clamping block (3) is provided with a slot (8), and the inside of the slot (8) is slidably connected to a connecting plate (9). The outer wall of the connecting plate (9) is provided with a laser sensor (10). The inside of the front end plate (2) is fixedly connected to a fixing sleeve (11), and the inside of the fixing sleeve (11) is slidably fitted with a piston rod (12). The output end of the hydraulic cylinder body (1) is fixedly connected to the rear end of the piston rod (12).
2. The real-time monitoring device for the stroke of the piston rod of a ram preventer according to claim 1, characterized in that: The disassembly and assembly components are provided in two sets, and the two sets of disassembly and assembly components are respectively located on the inner sides of the front end plate (2). The connecting plate (9) and the laser sensor (10) are fixed together by screws.
3. The real-time monitoring device for the piston rod stroke of a gate blowout preventer according to claim 1, characterized in that: It also includes a processing unit and a display unit. The laser sensor (10) is a TOF type laser ranging sensor. A monitoring hole (15) is opened inside the front end plate (2). The laser emitting end and the receiving end of the laser sensor (10) are aligned with the monitoring hole (15). A positioning shaft one (13) is fixedly connected to the outer wall of the piston rod (12). A positioning shaft two (14) is fixedly connected to the outer wall of the piston rod (12). The positioning shaft one (13) and the positioning shaft two (14) are both set on the outer wall of the piston rod (12) facing the laser sensor (1). On the side of 0), the distance between the rear end of positioning shaft one (13) and piston rod (12) is greater than the distance between the rear end of positioning shaft two (14) and piston rod (12). The height of positioning shaft one (13) protruding from the outer wall of piston rod (12) is different from the height of positioning shaft two (14) protruding from the outer wall of piston rod (12). The distance between the outer wall of piston rod (12) and the receiver of laser sensor (10) is H1. When positioning shaft one (13) moves to the position of monitoring hole (15), the end face of the protruding end of positioning shaft one (13) and the laser sensor ( The distance between the receivers of the laser sensor (10) is H2; when the positioning shaft (14) moves to the position of the monitoring hole (15), the distance between the end face of the protruding end of the positioning shaft (14) and the receiver of the laser sensor (10) is H3; the laser sensor (10) outputs an electrical signal representing the measured distance, and the processing unit converts the electrical signal into a measured distance and compares it with the preset H1, H2, and H3 respectively; when the measured distance is equal to H1, the processing unit outputs a first signal to the display unit indicating that neither the positioning shaft (13) nor the positioning shaft (14) is in position. The display unit displays a first prompt message indicating that both positioning axis 1 (13) and positioning axis 2 (14) are not in position based on the first signal; when the measured distance is equal to H2, the processing unit outputs a second signal indicating that positioning axis 1 (13) is in position to the display unit, and the display unit displays a second prompt message indicating that positioning axis 1 (13) is in position based on the second signal; when the measured distance is equal to H3, the processing unit outputs a third signal indicating that positioning axis 2 (14) is in position to the display unit, and the display unit displays a third prompt message indicating that positioning axis 2 (14) is in position based on the third signal.
4. The real-time monitoring device for the piston rod stroke of a gate blowout preventer according to claim 3, characterized in that: The piston rod (12) is equipped with a mounting plate (16) at its front end, and the cylinder body (1) is slidably connected to a rear end plate (17) on its outer wall. The rear end plate (17) is slidably connected to a bolt rod (18) inside.
5. A real-time monitoring device for the piston rod stroke of a gate blowout preventer according to claim 4, characterized in that: Four bolt rods (18) are provided. The bolt rods (18) are slidably connected inside the front end plate (2). Nuts (19) are threadedly connected to both ends of the bolt rods (18).
6. The real-time monitoring device for the piston rod stroke of a gate blowout preventer according to claim 3, characterized in that: The height of the first positioning shaft (13) protruding from the outer wall of the piston rod (12) is greater than the height of the second positioning shaft (14) protruding from the outer wall of the piston rod (12), or the height of the first positioning shaft (13) protruding from the outer wall of the piston rod (12) is less than the height of the second positioning shaft (14) protruding from the outer wall of the piston rod (12).