Fixing mechanism of magnetostrictive displacement sensor

Abstract

The utility model discloses a fixing mechanism of a magnetostrictive displacement sensor, which is used for externally fixing the magnetostrictive displacement sensor and a hydraulic oil cylinder and comprises a magnetic ring fixing support, a sliding rail supporting piece and a fixing support. One end of the magnetic ring fixing support is connected with the movable end of the hydraulic oil cylinder, and the other end of the magnetic ring fixing support is connected with the magnetostrictive displacement sensor. The upper portion of the sliding rail supporting piece is connected with the hydraulic oil cylinder, the middle of the sliding rail supporting piece is movably connected with the first magnetic ring fixing support, and the bottom of the sliding rail supporting piece is movably connected with a detection rod of the magnetostriction displacement sensor. The upper side of the fixed support is connected with the fixed end of the hydraulic oil cylinder, and the lower side of the fixed support is connected with the magnetostrictive displacement sensor. The magnetostrictive displacement sensor is adopted as a displacement sensor of the deepwater hydraulic oil cylinder, and the deepwater hydraulic oil cylinder has the advantages of being high in anti-interference performance, high in positioning accuracy, simple in structure and the like. And the elongation of the oil cylinder is consistent with that of the sensor, so that a connecting piece at the other connecting end of the oil cylinder cannot interfere with the sensor.

Description

Technical Field

[0001] This utility model relates to the technical field of installation of displacement sensors for deep-water hydraulic cylinders, and specifically to a fixing mechanism for a magnetostrictive displacement sensor. Background Technology

[0002] Hydraulic cylinders in deep-sea equipment require precise position information during operation. Considering the influence of seawater pressure and turbidity during deep-sea operations, magnetostrictive displacement sensors are recommended to ensure high reliability, strong anti-interference capabilities, and high precision for deep-sea equipment. Magnetostrictive displacement sensors are typically installed on cylinders in two ways: internal and external. Internal installation requires customization, resulting in poor versatility and increased costs. External cylinder mounting typically involves fixing the magnetostrictive displacement sensor body to the fixed end of the cylinder and installing a magnetic ring on the moving end. Distance is measured by detecting the strain mechanical wave pulse signal change caused by the magnetic ring's extension and retraction of the moving end. With this external cylinder mounting method, the effective detection length of the sensor is much greater than the cylinder's extension. When space is limited at both ends of the cylinder, interference may occur between the measuring rod and the connecting part at one end of the cylinder during retraction. Utility Model Content

[0003] The present invention aims to overcome at least one of the defects of the prior art and provide a fixing mechanism for a magnetostrictive displacement sensor so as to ensure that the connection between the detection rod and the moving end of the cylinder does not interfere when accurately measuring the displacement of the cylinder.

[0004] This utility model provides a fixing mechanism for a magnetostrictive displacement sensor, used for external fixing of the magnetostrictive displacement sensor and a hydraulic cylinder. It includes a magnetic ring fixing bracket, a slide rail support, and a fixing bracket. One end of the magnetic ring fixing bracket is fixed to the piston rod of the hydraulic cylinder, and the other end is connected to the magnetostrictive displacement sensor. The hydraulic cylinder is fixed above the slide rail support, with a central opening allowing the magnetic ring fixing bracket to pass freely, and the bottom is movably connected to the detection rod of the magnetostrictive displacement sensor. The upper side of the fixing bracket is fixed to the fixed end of the hydraulic cylinder, and the lower side is fitted with the magnetostrictive displacement sensor.

[0005] The calibration method for the magnetostrictive displacement sensor on the cylinder push rod is as follows: Assuming the cylinder's extension range is (Lmin, Lmax) millimeters, due to the magnetic ring, the sensor's electrical signal range within the (Lmin, Lmax) extension range is milliamperes. The code value range transmitted to the computer via cable is [value missing]. Extend the cylinder from its zero position to its maximum position and record the code value Cmax. By proportionally mapping the code value to the cylinder extension Lmax, the cylinder's extension / retraction can be measured. This calibration method demonstrates that the offset fixed magnetic ring ensures the sensor's extension rod measurement area is the same length as the cylinder's extension, significantly shortening the sensor's extension rod length, saving space, and avoiding interference. Furthermore, this offset sensor and magnetic ring fixing method has a relatively simple structure, is easy to disassemble, and has low maintenance costs.

[0006] The magnetic ring fixing bracket provides a buffer space during the extension and retraction of the hydraulic cylinder, thus preventing the piston rod from rotating during the cylinder's movement and causing interference between the magnetic ring fixing structure and the detection rod. The slide rail support ensures the magnetic ring fixing bracket remains stable along its longitudinal axis, preventing lateral swaying and improving the accuracy of the detection rod's measurement.

[0007] Furthermore, the magnetic ring fixing bracket includes a clamp, a first bracket, a sliding bushing, a connecting rod, and a magnetic ring fixing structure connected in sequence; the upper end of the clamp is fixedly connected to the piston rod of the hydraulic cylinder, and the lower end is movably connected to the first bracket; one end of the magnetic ring fixing structure is connected to the connecting rod, and the other end is sleeved on the magnetic ring of the magnetostrictive displacement sensor and fixedly connected.

[0008] Furthermore, the first bracket has an annular hole in the middle, and the clamp passes through the annular hole to be fixed to the piston rod.

[0009] The first bracket has an annular hole at its upper part for the clamp to pass through. This secures the entire magnetic ring fixing bracket to the cylinder piston rod. The sliding bushing connects the first bracket and the connecting rod, preventing the cylinder piston rod from rotating during cylinder extension and retraction, thus avoiding interference between the magnetic ring fixing structure and the detection rod. The opening of the magnetic ring fixing structure matches the magnetic ring and is fixed with screws. It is preferably made of organic or ceramic material, and its contact surface with the cylinder has an arc shape and a smooth surface.

[0010] Furthermore, the slide rail support is provided with a first mounting hole, a first through hole, and a second through hole from top to bottom; the hydraulic cylinder passes through the first mounting hole for fixation, the connecting rod passes through the first through hole, and the detection rod of the magnetostrictive displacement sensor passes through the second through hole.

[0011] Furthermore, the slide rail support includes a support structure, a first clamp, and fastening screws. The top of the support structure has an arc-shaped recess, which forms a first mounting hole for installing a hydraulic cylinder with the first clamp. The support structure and the first clamp are fixed to the hydraulic cylinder by fastening screws. The lower part of the support structure has a first through hole and a second through hole in sequence. The first through hole and the second through hole are sequentially located on the lower side of the support structure, and there is no friction between the first through hole and the second through hole in the sliding direction.

[0012] Furthermore, the slide rail support also includes a limit switch, which is located below the support structure and is used to limit the maximum allowable displacement of the hydraulic cylinder push rod.

[0013] Furthermore, the fixing mechanism also includes a control module, which is communicatively connected to the magnetostrictive displacement sensor, the hydraulic cylinder, and the limit switch. When the magnetic ring reaches the maximum allowable position, it triggers the limit switch, which sends a shut-off signal to the control module to automatically stop the hydraulic cylinder from continuing to move.

[0014] The support structure is used to support the connecting rod and the detection rod. Its first and second through holes are designed to allow the rod to pass through without friction in the sliding direction. The contact surface size with the oil cylinder matches the outer diameter of the oil cylinder. The first clamp is used to fix the integral slide rail support to the oil cylinder. Its size depends on the outer diameter of the oil cylinder. The limit switch is used to limit the maximum allowable displacement of the oil cylinder push rod. At this time, a shutdown signal can be sent to the control module in a timely manner to automatically stop the continued movement of the oil cylinder.

[0015] Furthermore, the fixed bracket includes a second bracket and a second clamp. The second bracket is connected to the cylinder body of the hydraulic cylinder through the second clamp, and the other end is fixed to the magnetostrictive displacement sensor.

[0016] Furthermore, the fixed bracket also includes a limit switch, which is used to limit the minimum allowable displacement of the push rod of the hydraulic cylinder.

[0017] Furthermore, the second bracket has an arc-shaped groove on its upper part, which forms a cylinder mounting position for fixing the hydraulic cylinder with the second clamp; the second bracket has a third through hole on its lower part, and the magnetostrictive displacement sensor is fixed in the third through hole.

[0018] The second bracket is used to fix the magnetostrictive displacement sensor body and is fixed to the cylinder body by the second clamp. The limit switch is used to limit the minimum allowable displacement of the cylinder push rod. At this time, a shut-off signal can be sent to the control module to automatically stop the cylinder from moving.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] Since deep-water pressure has minimal impact on the measurements of magnetostrictive sensors, this invention can be used to measure cylinder displacement under deep-water pressure environments, such as for measuring the stroke of deep-sea equipment during seabed operations. Furthermore, the structure of this invention, employing an external cylinder displacement sensor, avoids interference with the connecting rings at both ends of the cylinder. Moreover, this invention has a simple structure, is easy to install, and effectively prevents interference between the connecting part at the other end of the cylinder and the sensor extension rod. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the installation of the fixing mechanism of this utility model.

[0022] Figure 2 This is a schematic diagram of the installation of the magnetic ring fixing bracket of the fixing mechanism of this utility model.

[0023] Figure 3 This is a front view structural diagram of the magnetic ring fixing bracket of this utility model.

[0024] Figure 4 This is a schematic diagram of the installation of the slide rail support component of this utility model.

[0025] Figure 5 This is a front view structural diagram of the slide rail support component of this utility model.

[0026] Figure 6 This is a schematic diagram of the installation of the fixed bracket of this utility model.

[0027] Figure 7 This is a front view schematic diagram of the fixed bracket of this utility model. Detailed Implementation

[0028] The accompanying drawings illustrate the technical solutions of this utility model in more detail. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are only some, not all, of the embodiments of this utility model. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] Example

[0032] This embodiment provides a fixing mechanism for a magnetostrictive displacement sensor, such as... Figure 1 As shown, one end of the hydraulic cylinder 200 is a piston rod 201, the middle part is a cylinder body 202, and the other end is a fixed end 203; the magnetostrictive displacement sensor includes a detection rod 101 and a main body 102; the magnetostrictive displacement sensor is connected to the hydraulic cylinder 200 through the fixing mechanism of this application to achieve external fixing.

[0033] The fixing mechanism of this utility model includes a magnetic ring fixing bracket 1, a slide rail support 2, and a fixing bracket 3; one end of the magnetic ring fixing bracket 1 is fixed to the piston rod 201 of the hydraulic cylinder 200, and the other end is connected to the magnetostrictive displacement sensor; the hydraulic cylinder 200 is fixed above the slide rail support 2, with an opening in the middle for the magnetic ring fixing bracket 1 to pass freely, and the detection rod 101 of the magnetostrictive displacement sensor is movably connected to the bottom; the upper side of the fixing bracket 3 is connected to the fixed end 203 of the hydraulic cylinder 200, and the magnetostrictive displacement sensor is installed on the lower side.

[0034] Combination Figures 2-3As shown, the magnetic ring fixing bracket 1 includes a clamp 11, a first bracket 12, a sliding bushing 13, a connecting rod 14, and a magnetic ring fixing structure 15 connected in sequence; the upper end of the clamp 11 is fixedly connected to the piston rod 201 of the hydraulic cylinder 200, and the lower end is movably connected to the first bracket 12; one end of the magnetic ring fixing structure 15 is connected to the connecting rod 14, and the other end is sleeved on the magnetic ring of the magnetostrictive displacement sensor and fixedly connected. The first bracket 12 has an annular hole 121 in the middle for the clamp 11 to pass through, so that the clamp 11 passes through the annular hole 121 and is fixed to the piston rod 201, thereby fixing the entire magnetic ring fixing bracket 1 to the cylinder piston rod 201. The sliding bushing 13 is used to connect the first bracket 12 and the connecting rod 14 to prevent the cylinder piston rod 201 from rotating during the cylinder extension and retraction movement, which would cause interference between the magnetic ring fixing structure 15 and the detection rod 101. The opening of the magnetic ring fixing structure 15 matches the magnetic ring and is fixed with screws. It is preferably made of organic or ceramic material, and the contact surface with the cylinder is arc-shaped and has a smooth surface.

[0035] like Figures 4-5 As shown, the slide rail support 2 includes a support structure 21, a first clamp 22, a fastening screw 23, and a limit switch 24. The top of the support structure 21 has an arc-shaped recess, forming a first mounting hole 10 for mounting the hydraulic cylinder 200 with the first clamp 22. The support structure 21 and the first clamp 22 are fixed to the hydraulic cylinder 200 by the fastening screw. Below the support structure 21, a first through hole 20 and a second through hole 30 are sequentially provided, located on the lower side of the support structure 21, and the first through hole 20 and the second through hole 30 have no or minimal friction in the sliding direction. The connecting rod 14 passes through the first through hole 20; the detection rod 101 of the magnetostrictive displacement sensor passes through the second through hole 30. The limit switch 24 is located below the support structure 21 and is used to limit the maximum allowable extension displacement of the hydraulic cylinder 200 push rod.

[0036] The fixing mechanism in this embodiment also includes a control module (not shown in the figure). The control module is communicatively connected to the magnetostrictive displacement sensor, the hydraulic cylinder 200, and the limit switch 24. When the magnetic ring reaches the maximum allowable position, it triggers the limit switch, which sends a shut-off signal to the control module, automatically stopping the continued movement of the hydraulic cylinder 200. The support structure 21 is used to support the connecting rod 14 and the detection rod 101. Its first through hole 20 and second through hole 30 are designed to accommodate the passage of the connecting rod 14 and the detection rod 101, with no or minimal friction in the sliding direction. The contact surface size between the support structure 21 and the cylinder matches the outer diameter of the cylinder. The first clamp 22 is used to fix the integral slide rail support 2 to the cylinder, and its size depends on the outer diameter of the cylinder. The limit switch 24 is used to limit the maximum allowable extension displacement of the cylinder push rod. At this time, a shut-off signal can be sent to the control module in a timely manner to automatically stop the continued movement of the cylinder. The control module can be remotely set, enabling remote monitoring and adjustment, and can be implemented using existing central control equipment.

[0037] like Figures 6-7 As shown, the fixed bracket 3 includes a second bracket 31, a second clamp 32, and a limit switch 33. The second bracket 31 is connected to the cylinder body of the hydraulic cylinder 200 via the second clamp 32, and the other end is fixed to the magnetostrictive displacement sensor. The limit switch 33 is used to limit the minimum allowable displacement of the push rod of the hydraulic cylinder 200. At this time, a shut-off signal can be sent to the control module to automatically stop the cylinder from continuing to move. The limit switch 33 is located at the bottom of the second bracket 31 facing the piston rod 201 of the hydraulic cylinder.

[0038] The second bracket 31 has an arc-shaped groove on its upper part, which, together with the second clamp 32, forms a cylinder mounting position 40 for fixing the hydraulic cylinder 200, and is cylindrical in shape. The second bracket 31 has a third through hole 50 on its lower part. The second bracket 31 has a detachable structure, that is, by disassembling it in half, the size of the third through hole 50 can be adjusted to facilitate the fixing of the magnetostrictive displacement sensor in the third through hole 50. The third through hole 50 is also circular, so that the magnetostrictive displacement sensor can pass through it for fixing.

[0039] Therefore, this utility model uses a magnetostrictive displacement sensor as the displacement sensor of the deep-water hydraulic cylinder 200, which has the advantages of strong anti-interference, high positioning accuracy and simple structure; and the fixing mechanism of this application is suitable for fixing the measuring sensor and the magnetic ring. The offset fixing magnetic ring bracket design can make the elongation of the cylinder and the sensor consistent, ensuring that the connecting part at the other end of the cylinder will not interfere with the sensor.

[0040] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the preferred embodiments above, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model should not depart from the spirit and scope of this utility model. Those skilled in the art can also make other changes within the spirit of this utility model for its design, as long as they do not deviate from the technical effect of this utility model. These changes made according to the spirit of this utility model should all be included within the scope of protection claimed by this utility model.

Claims

1. A fixing mechanism of a magnetostrictive displacement sensor for external fixing of a magnetostrictive displacement sensor to a hydraulic cylinder (200), characterized in that, It comprises a magnetic ring fixing support (1), a slide rail support (2) and a fixing support (3). One end of the magnetic ring fixing support (1) is fixed with the movable end of the hydraulic cylinder (200), and the other end is connected with the magnetostrictive displacement sensor. The upper part of the slide rail support (2) is fixed with the hydraulic cylinder (200), the middle part is provided with a hole for the free passing of the magnetic ring fixing support (1), and the bottom is movably connected with the detection rod (101) of the magnetostrictive displacement sensor. The upper side of the fixing support (3) is fixed on the fixed end (203) of the hydraulic cylinder (200), and the lower side is provided with the magnetostrictive displacement sensor.

2. The securing mechanism of claim 1, wherein, The magnetic ring fixing support (1) comprises a hoop (11), a first support (12), a sliding bushing (13), a connecting rod (14) and a magnetic ring fixing structure (15) connected in sequence. The upper end of the hoop (11) is fixedly connected with the piston rod (201) of the hydraulic cylinder (200), and the lower end is movably connected with the first support (12). One end of the magnetic ring fixing structure (15) is connected with the connecting rod (14), and the other end is sleeved on the magnetic ring of the magnetostrictive displacement sensor and is fixedly connected.

3. The securing mechanism of claim 2, wherein, The first support (12) is provided with an annular hole (121) in the middle, and the hoop (11) passes through the annular hole (121) and is fixed on the piston rod (201).

4. The securing mechanism of claim 2, wherein, The slide rail support (2) is provided with a first mounting hole (10), a first through hole (20) and a second through hole (30) from top to bottom in sequence; the hydraulic cylinder (200) penetrates through the first mounting hole (10) to be fixed, the connecting rod (14) penetrates through the first through hole (20), and the detection rod (101) of the magnetostrictive displacement sensor penetrates through the second through hole (30).

5. The securing mechanism of claim 4, wherein, The slide rail support (2) comprises a support structure (21), a first clamp (22) and a fastening screw (23), the top of the support structure (21) is provided with an arc-shaped recess, and the first clamp (22) forms a first mounting hole (10) for mounting the hydraulic cylinder (200); the support structure (21) and the first clamp (22) are fixed with the hydraulic cylinder (200) through the fastening screw; the first through hole (20) and the second through hole (30) are sequentially arranged on the lower side of the support structure (21), and the first through hole (20) and the second through hole (30) have no friction in the sliding direction.

6. The securing mechanism of claim 5, wherein, The slide rail support (2) further comprises a travel switch (24), which is arranged below the support structure (21) and is used for limiting the maximum displacement of the allowable elongation of the push rod of the hydraulic cylinder (200).

7. The securing mechanism of claim 5, wherein, It further comprises a control module, which is in communication connection with the magnetostrictive displacement sensor, the hydraulic cylinder (200) and the travel switch (24); when the magnetic ring reaches the maximum allowable position, the travel switch (24) is triggered, the travel switch sends a shutdown signal to the control module, and the continuous movement of the hydraulic cylinder (200) is automatically stopped.

8. The securing mechanism of claim 2, wherein, The fixed support (3) comprises a second support (31) and a second clamp (32), the second support (31) is connected with the cylinder body of the hydraulic oil cylinder (200) through the second clamp (32), and the other end is fixed with the magnetostrictive displacement sensor.

9. The securing mechanism of claim 8, wherein, The fixed support (3) further comprises a limit switch (33) for limiting the allowable minimum displacement of the push rod of the hydraulic oil cylinder (200).

10. The securing mechanism of claim 8, wherein, An arc-shaped groove is arranged above the second support (31), the arc-shaped groove and the second clamp (32) form a cylinder body mounting position (40) for fixing the hydraulic oil cylinder (200); a third through hole (50) is arranged below the second support (31), and the magnetostrictive displacement sensor is fixed in the third through hole (50).

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