Supporting deformation monitoring system for supporting oil cylinder

Abstract

The utility model belongs to the technical field of hydraulic oil cylinders, and particularly relates to a supporting deformation monitoring system for a supporting oil cylinder, which comprises a cylinder body and a piston arranged on the inner wall of the cylinder body in a sliding manner, a piston rod is arranged at one end of the piston, the supporting deformation monitoring system further comprises a locking ring, and internal threads are arranged on the locking ring; a supporting ring is arranged at one end of the cylinder body, external threads are arranged on the section, away from the cylinder body, of the piston rod, and the piston rod is in threaded connection with a locking ring. A gap is formed between the locking ring and the thread of the piston rod, and when the locking ring is screwed and attached to the supporting ring, the piston rod can axially move in the direction of the piston (rodless cavity); a supporting assembly is arranged at the tail end of the piston rod and used for supporting a main body structure. According to the system, the phenomenon that the collapse phenomenon cannot be monitored due to the fact that the pressure in the rodless cavity rigid body is not changed because the oil cylinder body is rigidly locked by the locking ring and force acts on the cylinder body when main structures such as supporting beams, columns and walls supported by the steel support deform is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic oil cylinders, in particular to a supporting oil cylinder support deformation monitoring system. Background Art

[0002] Support cylinders are hydraulic cylinders used to support main structures such as beams, columns, walls, etc. Support cylinders are usually used in engineering machinery, metallurgical equipment, ships and other fields to support various main structures. Support cylinders can effectively improve the stability and safety of the cylinders, prevent the cylinders from tilting or shaking during operation, and ensure the normal operation and work efficiency of the equipment.

[0003] When the support cylinder is supporting, its cylinder pressure is fixed. Generally, a pressure sensor or a displacement sensor is set in the cylinder. The pressure sensor is used to detect whether the pressure in the cylinder changes, and the displacement sensor is used to detect whether the piston rod of the support cylinder moves, so as to determine whether the support cylinder is deformed during the supporting process. It is used to determine and detect whether the supported main structure collapses.

[0004] The shortcomings of the prior art 1:

[0005] (1) Only the cylinder pressure or the hydraulic cylinder stroke is collected, and the hydraulic cylinder stroke and the cylinder pressure are not cross-validated to determine the change of external load;

[0006] (2) When the external load remains unchanged and the cylinder is static for a long time, the pressure inside the cylinder increases with the increase of ambient temperature. The pressure increase caused by the hydraulic cylinder itself will lead to misjudgment of the deformation of the supported main structures such as beams, columns, and walls. Utility Model Content

[0007] In view of the technical problems existing in the background technology, the utility model provides a support cylinder support deformation monitoring system.

[0008] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0009] A support oil cylinder support deformation monitoring system comprises a hydraulic cylinder, wherein the hydraulic cylinder comprises a cylinder body and a piston slidably arranged on the inner wall of the cylinder body, a piston rod is arranged at one end of the piston, and a locking ring is also included, on which an internal thread is arranged; a support ring is arranged at one end of the cylinder body, an external thread is arranged at a section of the piston rod away from the cylinder body, and a locking ring is threadedly connected to the piston rod; an axial gap is provided between the locking ring and the piston rod thread, and when the locking ring is screwed tightly onto the support ring and the piston rod is compressed, the piston rod can move axially toward the piston; a support assembly is arranged at the end of the piston rod, and the support assembly is used to support the main structure.

[0010] Optionally, a magnetostrictive displacement sensor is arranged in the cylinder body, a waveguide tube of the magnetostrictive displacement sensor is arranged inside the cylinder body, the piston rod is arranged hollow inside, one end of the waveguide tube passes through the piston and extends into the piston rod, a magnetic ring is arranged on the inner wall of the piston close to the piston rod, and the magnetic ring is sleeved on the outside of the waveguide tube.

[0011] Optionally, a sealing ring is provided on the inner wall of the piston away from the piston rod, and the sealing ring is arranged closely against the outer wall of the waveguide.

[0012] Optionally, the inner wall of the support ring is the same as the outer wall of the piston rod, and the piston rod is slidably arranged close to the inner wall of the support ring.

[0013] Optionally, the support assembly includes a plug, a support plate and a pressure cover, the plug is arranged at the end of the piston rod, the support plate is arranged close to the plug, a stepped hole is arranged in the support plate, a pressure cover is arranged in the stepped hole, and the pressure cover, the support plate and the plug are fixed by locking screws.

[0014] Optionally, the contact surface between the plug and the support plate is a spherical surface.

[0015] Optionally, a top block is inserted into the outer side of the support plate, and the top block and the support plate are welded and fixed.

[0016] Optionally, a clamp is provided on the outer wall of the plug, and the clamp is fixed to the plug by fixing screws.

[0017] Optionally, a pressure sensor for detecting the pressure of the rodless cavity and the rod cavity is provided in the cylinder body.

[0018] Optionally, when the locking ring is screwed tightly onto the supporting ring, it is connected to the supporting ring as a whole through a fixing mechanism.

[0019] The utility model has the following advantages and beneficial effects:

[0020] In the utility model, according to the deformation warning requirements of the main structures such as the supporting beams, columns, walls, etc. supported by the steel support, the axial assembly accuracy of the trapezoidal internal thread on the locking device (locking ring) and the trapezoidal external thread on the piston rod 3 is designed, so that when the locking ring contacts the upper cylinder body support ring to generate a pre-tightening force, a certain amount of axial displacement △L can still be generated between the locking ring and the piston rod (the displacement is equal to the deformation of the main structures such as the supporting beams, columns, walls, etc. supported by the steel support) to ensure the deformation of the main structures such as the supporting beams, columns, walls, etc. supported by the steel support in the axial direction from the rod cavity to the rodless cavity of the cylinder, to prevent the locking ring from rigidly locking the cylinder body, causing the force to act on the cylinder body when the main structures such as the supporting beams, columns, walls, etc. supported by the steel support are deformed, resulting in no change in the pressure in the rigid body of the rodless cavity and the inability to monitor the collapse phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A half-section view of the support cylinder provided by the utility model;

[0022] Figure 2 An isometric cross-sectional view of the support cylinder provided by the utility model;

[0023] Figure 3 A cross-sectional view of the magnetic ring and the piston provided by the utility model;

[0024] Figure 4 for Figure 1 Right view of;

[0025] Figure 5 A cross-sectional view of the connection between the support ring, the locking ring and the piston rod provided by the utility model;

[0026] Figure 6 A cross-sectional view of the connection of the locking ring, the piston rod and the clip provided by the utility model;

[0027] Icon: 1-cylinder body, 2-piston, 3-piston rod, 4-seal, 5-support ring, 6-locking ring, 7-support plate, 8-magnetotropic displacement sensor, 9-magnetic ring, 10-waveguide tube, 11-seal ring, 12-plug, 13-top block, 14-pressure cover, 15-locking screw, 16-hoop, 17-fixing screw, 18-guide sleeve, 19-connecting screw, 20-limiting ring, 21-clip, 22-locking screw. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] like Figures 1 to 4As shown, a support oil cylinder support deformation monitoring system includes a hydraulic oil cylinder, which includes a cylinder body 1, a piston 2, a piston rod 3, a support ring 5, a locking ring 6, a support assembly, etc. The inner wall of the cylinder body 1 is slidably provided with a piston 2, one end of the cylinder body 1 is provided with an oil port connected to the rodless cavity, and the other end of the cylinder body 1 is plugged with a guide sleeve 18, the guide sleeve 18 and the cylinder body 1 are fixed as a whole by a connecting screw 19, and the guide sleeve 18 is provided with an oil port connected to the rod cavity. A piston rod 3 is welded to one end of the piston 2, and the outer wall of the piston rod 3 is slidably arranged close to the inner wall of the guide sleeve 18, and a seal 4 is provided on the inner wall and the outer wall of the guide sleeve 18 to ensure the sealing effect. Specifically, a sealing retainer is provided on the outer wall of the guide sleeve 18, and a shaft wear-resistant ring, a sealing retainer and a dustproof ring are provided on the inner wall of the guide sleeve 18 in sequence from the inside to the outside. A support assembly is provided at the end of the piston rod 3, and the support assembly is used to support the main structure. The locking ring 6 is provided with a trapezoidal internal thread; a support ring 5 is provided at one end of the cylinder body 1, a section of the piston rod 3 away from the cylinder body 1 is provided with a trapezoidal external thread, and the piston rod 3 is threadedly connected with the locking ring 6; there is an axial gap between the locking ring 6 and the piston rod 3 threads, and when the locking ring 6 is screwed tightly onto the support ring 5 (such as Figure 5 As shown, at this time, the upper side thread pair of the piston rod 3 thread is in direct contact with the lower side thread pair of the locking ring 6 thread). When the support is deformed, the piston rod 3 can move axially toward the piston 2 when it is compressed, that is, the locking ring 6 is fixed, and the piston rod 3 moves relative to the locking ring 6. When the support is allowed to deform, the piston rod 3 can be displaced a certain distance so that the displacement sensor can detect the support deformation. When the displacement sensor detects that the deformation exceeds the warning amount, it can alarm to remind the staff, and after the piston rod 3 moves a certain distance relative to the locking ring 6, the threads of the piston rod 3 and the locking ring 6 will be locked, thereby preventing the piston rod 3 from continuing to be compressed, playing the role of mechanical limit.

[0032] Furthermore, a magnetostrictive displacement sensor 8 is provided in the cylinder body 1, and the magnetostrictive displacement sensor 8 adopts the existing technology. The magnetostrictive displacement sensor measures the actual displacement value of the detected product by accurately detecting the absolute position of the active magnetic ring 9 through the internal non-contact measurement and control technology. The magnetostrictive displacement sensor 8 includes a waveguide tube 10, a magnetic ring 9, etc., and the sensitive element in the waveguide tube 10 is made of a special magnetostrictive material. The measurement process is that a current pulse is generated in the electronic chamber of the sensor, and the current pulse is transmitted in the waveguide tube 10, thereby generating a circumferential magnetic field outside the waveguide tube 10. When the magnetic field intersects with the magnetic field generated by the active magnetic ring 9 as a position change on the waveguide tube 10, due to the effect of magnetostriction, a strain mechanical wave pulse signal is generated in the waveguide tube 10. This strain mechanical wave pulse signal is transmitted at a fixed sound speed and is quickly detected by the electronic chamber.

[0033] like Figure 2 , Figure 3 As shown, the waveguide tube 10 of the magnetostrictive displacement sensor 8 is arranged inside the cylinder body 1, and is hollow inside the piston rod 3. One end of the waveguide tube 10 passes through the piston 2 and extends into the piston rod 3. A magnetic ring 9 is arranged on the inner wall of the piston 2 close to the piston rod 3, and the magnetic ring 9 is sleeved on the outside of the waveguide tube 10. A sealing ring 11 is arranged on the inner wall of the piston 2 away from the piston rod 3, and the sealing ring 11 is arranged closely against the outer wall of the waveguide tube 10. Through the built-in displacement sensor, the displacement change can be sensed when the piston 2 is extended and retracted, and the extension and retraction of the piston 2 can be detected.

[0034] Furthermore, the inner wall of the support ring 5 is the same as the outer wall of the piston rod 3, and the piston rod 3 is slidably arranged close to the inner wall of the support ring 5 to support the telescopic limit of the piston rod 3 and prevent the piston rod 3 from telescopically deviating.

[0035] like Figures 1 to 4 As shown, the support assembly includes a plug 12, a support plate 7 and a pressure cover 14. The plug 12 is plugged and arranged at the end of the piston rod 3, and the support plate 7 is arranged close to the plug 12. Preferably, the contact surface between the plug 12 and the support plate 7 is a spherical surface, and the two are pressed against each other. A stepped hole is arranged in the support plate 7, and the middle of the plug 12 extends into the trapezoidal hole. A pressure cover 14 is arranged in the stepped hole, and the pressure cover 14 is pressed against the support plate 7. The pressure cover 14, the support plate 7 and the plug 12 are fixed by locking screws 15.

[0036] Furthermore, a top block 13 is inserted into the outer side of the support plate 7. The top block 13 is square in shape. The top block 13 and the support plate 7 are welded and fixed to increase the support area.

[0037] Furthermore, a clamp 16 is provided on the outer wall of the plug 12 , and the clamp 16 is fixed to the outer wall of the plug 12 by a fixing screw 17 , and the locking ring 6 can be limited by the clamp 16 .

[0038] Furthermore, a pressure sensor for detecting the pressure in the rodless cavity and the rod cavity is arranged in the cylinder body 1. Preferably, the pressure sensor can be arranged only in the rodless cavity to detect the pressure in the rodless cavity.

[0039] In the present invention, the displacement direction of the hydraulic cylinder piston rod 3 can also be determined by methods other than displacement sensors. Pressure sensors can be installed in both the rod chamber and the rodless chamber of the cylinder to perform pressure comparison to determine the movement direction of the cylinder piston rod 3, thereby eliminating false alarms caused by the cylinder's own errors.

[0040] In the utility model, according to the deformation warning requirements of the main structures such as the supporting beams, columns, walls, etc. supported by the steel support, the axial assembly accuracy of the trapezoidal internal thread set in the locking ring 6 and the trapezoidal external thread on the piston rod 3 is designed, so that when the locking ring 6 contacts the upper support ring 5 to generate a pre-tightening force, a certain amount of axial displacement △L can still be generated between the locking ring 6 and the piston rod 3 (the displacement is equal to the deformation of the main structures such as the supporting beams, columns, walls, etc. supported by the steel support), so as to ensure the deformation of the main structures such as the supporting beams, columns, walls, etc. supported by the steel support in the axial direction of the cylinder from the rod cavity to the rodless cavity, and prevent the locking ring 6 from rigidly locking the cylinder body 1 and the piston rod 6, causing the main structures such as the supporting beams, columns, walls, etc. supported by the steel support to be deformed. The force acts directly on the cylinder body 1, resulting in compression deformation and damage to the cylinder body 1. At the same time, due to the force on the cylinder body 1, the piston rod 3 cannot be extended or retracted, resulting in no change in pressure and displacement in the rigid body of the rodless cavity, and the collapse phenomenon cannot be monitored.

[0041] In the utility model, a pressure sensor and a displacement sensor are designed through the matching connection between the locking ring 6 and the piston rod 3, and the actual change of the external load can be judged by the pressure increment △P; it can be judged whether the cylinder piston rod 3 is in a contraction or extension state when the pressure in the cylinder increases; when the piston rod 3 is extended, the pressure in the rodless chamber exceeds the system setting pressure, and the hydraulic pump can be started to maintain the pressure of the system after the pressure is released. When the piston rod 3 is contracted, the pressure in the rodless chamber exceeds the system setting pressure, which means that the deformation of the main structure such as the supporting beam, column, wall, etc. supported by the steel support is close to or exceeds the warning requirements, and manual inspection is required to ensure construction safety. This structure and judgment method avoids the misjudgment of the deformation of the main structure such as the supporting beam, column, wall, etc. supported by the pressure increase caused by the hydraulic cylinder itself.

[0042] By installing a pressure sensor in the rodless cavity of the hydraulic cylinder, the deformation of the main structures such as the supporting beams, columns, and walls supported by the steel support is monitored according to the pressure difference (△P), and a displacement sensor is installed to determine the movement direction of the cylinder piston rod 3. Then, combined with the pressure changes in the rodless cavity of the cylinder, it is determined whether the pressure fluctuation is caused by the collapse of the main structures such as the supporting beams, columns, and walls, or the pressure increase caused by the cylinder itself (temperature, etc.).

[0043] For example, when the main body structure undergoes support deformation, the piston rod 3 will be compressed, and the piston rod 3 and the locking ring 6 can move axially, that is, the piston rod 3 can move, and this movement is then detected by the displacement sensor, so that the support deformation can be detected in time.

[0044] When the temperature changes, a pressure change caused by the temperature change is detected in the cylinder 1, and there are two specific situations.

[0045] The first is that temperature changes lead to pressure changes, but the pressure change value is small and not enough to affect the displacement of the piston rod 3. Therefore, the displacement sensor cannot detect the displacement, thereby judging that the pressure increase is caused by the hydraulic cylinder itself, rather than the deformation of the supported main structure such as the supporting beams, columns, walls, etc., which causes the pressure increase, thus avoiding the misjudgment of the deformation of the main structure.

[0046] The second is that temperature changes cause pressure changes, but the pressure change value is large enough to affect the displacement of the piston rod 3, so the displacement sensor can detect the displacement, thereby judging that the pressure increase is caused by the hydraulic cylinder itself, and the force of the increased pressure in the cylinder drives the piston rod 3 to push up, acting on the supported main structure, which will cause support deformation or damage to the support cylinder. Therefore, when the temperature rises, the pressure in the rodless cavity of the support cylinder increases, and the piston rod extends outward. Therefore, the increase in pressure in the rodless cavity of the cylinder caused by the increase in ambient temperature can be judged by the change in displacement and the increase in pressure in the cylinder, and the pressure can be relieved to avoid support deformation and cylinder damage.

[0047] Example 2

[0048] In view of the situation that the temperature change causes the pressure change to be too large, the force of the increased pressure in the cylinder drives the piston rod 3 to push up and act on the supported main structure, thereby causing the support to deform, this embodiment is further optimized.

[0049] When the locking ring 6 is screwed and fitted on the support ring 5, it is connected to the support ring 5 as a whole through the fixing mechanism. That is, after the piston rod 3 is extended for support, the locking ring 6 is rotated to fit on the support ring 5, and then the locking ring 6 and the support ring 5 are fixed as a whole by the fixing mechanism.

[0050] like Figure 6 As shown, as a preferred mode of the utility model, the structure of the fixing mechanism is: a U-shaped clip 21 is designed, a limit ring 20 is arranged on the outer wall of the upper end of the support ring 5, one end of the clip 21 is clamped on the bottom wall of the limit ring 20, and the other end is clamped on the upper end surface of the locking ring 6, and the clip 21 and the locking ring 6 are fixed by a locking screw 22. This design connects the locking ring 6 and the support ring 5 as a whole.

[0051] In the utility model, the displacement sensor is used to determine the movement direction of the piston rod 3, thereby determining whether the pressure increase in the rodless cavity is caused by the collapse of the support or the pressure increase in the rodless cavity cylinder is caused by the temperature increase. When the object on the support collapses, the piston rod 3 can have a margin for retraction, and its displacement deformation causes the pressure in the rodless cavity to increase, but the force will not immediately act on the thread pair, which plays a role in protecting the cylinder structure.

[0052] When the pressure in the rodless chamber of the oil cylinder increases due to the increase in temperature, the upper side pair of the piston rod 3 thread is in direct contact with the lower side thread pair of the locking ring 6 thread (such as Figure 6 As shown in the figure, the force of the increased pressure in the cylinder directly acts on the threaded pair, which will not cause deformation of the support. However, excessive force acting on the threaded pair will cause deformation of the thread and damage to the support cylinder. Therefore, when the temperature rises, the pressure in the rodless cavity of the support cylinder increases, and the piston rod 3 does not extend outward. Therefore, the increase in pressure in the rodless cavity of the cylinder caused by the increase in ambient temperature can be judged by the fact that there is no change in displacement and the increase in pressure in the cylinder, and non-support objects collapse, and the pressure can be relieved.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A support oil cylinder support deformation monitoring system, comprising a hydraulic oil cylinder, the hydraulic oil cylinder comprising a cylinder body and a piston slidably arranged on the inner wall of the cylinder body, one end of the piston is provided with a piston rod, characterized in that : It also includes a locking ring, which is provided with an internal thread; a support ring is provided at one end of the cylinder body, an external thread is provided on a section of the piston rod away from the cylinder body, and a locking ring is threadedly connected to the piston rod; there is an axial gap between the locking ring and the piston rod thread, and when the locking ring is screwed tightly onto the support ring and the piston rod is compressed, it can move axially toward the piston; a support assembly is provided at the end of the piston rod, and the support assembly is used to support the main structure.

2. The support cylinder support deformation monitoring system according to claim 1 is characterized in that: A magnetostrictive displacement sensor is arranged in the cylinder body, a waveguide tube of the magnetostrictive displacement sensor is arranged inside the cylinder body, the piston rod is arranged hollow inside, one end of the waveguide tube passes through the piston and extends into the piston rod, a magnetic ring is arranged on the inner wall of the piston close to the piston rod, and the magnetic ring is sleeved on the outside of the waveguide tube.

3. The support cylinder support deformation monitoring system according to claim 2 is characterized in that: A sealing ring is arranged on the inner wall of the piston away from the piston rod, and the sealing ring is arranged closely against the outer wall of the waveguide.

4. The support cylinder support deformation monitoring system according to claim 1, characterized in that: The inner wall of the support ring is the same as the outer wall of the piston rod, and the piston rod is slidably arranged close to the inner wall of the support ring.

5. The support cylinder support deformation monitoring system according to claim 1, characterized in that: The support assembly includes a plug, a support plate and a pressure cover. The plug is arranged at the end of the piston rod. The support plate is arranged close to the plug. A stepped hole is arranged in the support plate. A pressure cover is arranged in the stepped hole. The pressure cover, the support plate and the plug are fixed by locking screws.

6. The support cylinder support deformation monitoring system according to claim 5, characterized in that: The contact surface between the plug and the support plate is a spherical surface.

7. The support cylinder support deformation monitoring system according to claim 5, characterized in that: A top block is inserted into the outer side of the support plate, and the top block and the support plate are welded and fixed.

8. The support cylinder support deformation monitoring system according to claim 5, characterized in that: The outer wall of the plug is provided with a clamp, and the clamp is fixed to the plug by a fixing screw.

9. The support cylinder support deformation monitoring system according to claim 2, characterized in that: The cylinder body is provided with a pressure sensor for detecting the pressure of the rodless cavity and the rod cavity.

10. The support cylinder support deformation monitoring system according to claim 1, characterized in that: When the locking ring is screwed tightly onto the supporting ring, it is connected to the supporting ring as a whole through the fixing mechanism.

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