Stroke sensor induction magnetic ring and hydraulic support stroke detection device

Abstract

The utility model relates to the technical field of detection, in particular to a stroke sensor induction magnetic ring and a hydraulic support stroke detection device.The stroke sensor induction magnetic ring comprises an inner ring part arranged on a piston rod of a hydraulic support jack, and an installation groove is formed in the outer circumferential face of the inner ring part; the outer ring part is arranged on the periphery of the inner ring part in a sealing and sleeving manner, so that a sealed space is formed between the inner circumferential surface of the outer ring part and the mounting groove; and the magnetic piece is arranged in the mounting groove. According to the scheme, the defect that magnetism is weakened due to the fact that a magnetic ring is prone to corrosion and pressure damage in the prior art is overcome, and enhanced protection for improving the measurement precision and stability of the sensor is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection technical field especially relates to a stroke sensor induction magnetic ring and hydraulic support stroke detection device. BACKGROUND

[0002] In the mining work of the coal mine, the hydraulic support as the key equipment plays an important role in maintaining the stability of the working face and the production efficiency. The stroke sensor induction magnetic ring as one of the key components for monitoring the moving distance of the hydraulic support push jack is very important for real-time position feedback and straightness control.

[0003] The stroke sensor induction magnetic ring is usually installed in the hydraulic support jack, moves with the piston and is directly exposed to the high-pressure emulsion environment. However, due to the influence of the humid environment and the extreme working pressure of the coal mine, the magnetic parts in the magnetic ring are easily corroded and damaged by pressure, resulting in weakened magnetism. In this case, not only the measurement accuracy and stability of the sensor are affected, but also the whole machine electrical performance failure may be caused, thereby adversely affecting the production activities. SUMMARY

[0004] The utility model provides a stroke sensor induction magnetic ring and hydraulic support stroke detection device to solve the defect that the magnetic ring is easily corroded and damaged by pressure and causes weakened magnetism in the prior art, and realizes the enhanced protection of improving the measurement accuracy and stability of the sensor.

[0005] The utility model provides a stroke sensor induction magnetic ring, which comprises an inner ring part arranged on a piston rod of a hydraulic support jack, an outer ring part sealingly sleeved on an outer periphery of the inner ring part to form a sealed space between an inner periphery of the outer ring part and the mounting groove, and a magnetic part arranged in the mounting groove.

[0006] According to one embodiment of the utility model, the cooperation mode between the outer periphery of the inner ring part and the inner periphery of the outer ring part is interference fit.

[0007] According to one embodiment of the utility model, the inner periphery of the outer ring part is provided with an inner ring limiting step for stopping one end of the inner ring part.

[0008] According to one embodiment of the utility model, a first annular groove is arranged on the outer periphery of the inner ring part at a position adjacent to one side of the mounting groove, and a first O-ring is arranged in the first annular groove; in the assembled state of the inner ring part and the outer ring part, the distance between the first annular groove and the inner ring limiting step is greater than the distance between the mounting groove and the inner ring limiting step.

[0009] According to one embodiment of the utility model, the outer circumferential surface of the inner ring part is provided with an outer ring limiting step for stopping one end of the outer ring part.

[0010] According to one embodiment of the utility model, the outer circumferential surface of the inner ring part is provided with an outer ring limiting step for stopping one end of the outer ring part.

[0011] According to one embodiment of the utility model, the inner ring part is provided with a plurality of the installation grooves, and the plurality of installation grooves are evenly distributed around the circumferential direction of the inner ring part.

[0012] According to one embodiment of the utility model, in the plurality of installation grooves, the same polarity of the magnetic member is all inward or all outward relative to the radial direction of the inner ring part.

[0013] According to one embodiment of the utility model, the surface of the magnetic member is coated with a sealing glue layer, and / or the magnetic member is arranged at the groove bottom of the installation groove, and sealing glue is injected above the magnetic member in the installation groove.

[0014] The utility model also provides a kind of hydraulic support stroke detection device, including stroke sensor and the stroke sensor induction magnetic ring of above-mentioned embodiment;The stroke sensor is arranged at the outside of hydraulic support jack;The stroke sensor induction magnetic ring is arranged on the piston rod of the hydraulic support jack.

[0015] The stroke sensor induction magnetic ring and the hydraulic support stroke detection device provided by the utility model, the inner ring part with installation groove is arranged on the piston rod of the hydraulic support jack, then sealing space is formed between outer ring part and inner ring part, and magnetic member is placed in installation groove, so that external high-pressure emulsion can be effectively avoided to enter sealing space, the reliability of stroke sensor is protected, and simultaneously, the design makes that magnetic member can produce displacement along with the telescopic movement of jack piston rod, stroke sensor accurately reflects the stroke change of jack by detecting the position change of magnetic member, and the accurate control of hydraulic support in operation process is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the utility model or prior art, the drawings needed to be used in the following embodiment or prior art description will be simply introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and for ordinary skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0017] Figure 1 It is the exploded structure schematic view of the stroke sensor induction magnetic ring provided by the utility model.

[0018] Figure 2 is a cross-sectional structure schematic view of the travel sensor induction magnetic ring provided by the utility model.

[0019] Figure 3 is Figure 2 the axial structure schematic view of the travel sensor induction magnetic ring shown.

[0020] Figure 4 is a cross-sectional structure schematic view of the travel sensor induction magnetic ring provided by the utility model.

[0021] Reference signs:

[0022] 10, inner ring part; 11, mounting groove; 12, first annular groove; 13, first O-shaped ring; 14, second annular groove; 15, second O-shaped ring; 16, outer ring limiting step; 20, outer ring part; 21, inner ring limiting step; 30, magnetic member. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] In the description of the embodiments of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the drawings shown, and is only for the convenience of describing the embodiments of the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. It should be explained that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] In the operation of hydraulic support in coal mine, the stroke sensor induction magnetic ring is a key component for detecting the moving distance of the push jack, which is crucial for ensuring the straightness control of the hydraulic support in the working face. Traditionally, the induction magnetic ring is installed on the piston rod of the hydraulic support jack and directly immersed in the emulsion environment, bearing a hydraulic pressure of up to 40 MPa. Long-term operation in such harsh conditions can cause the internal boron steel magnet of the induction magnetic ring to be damaged due to moisture and high pressure, resulting in rust and magnetic decay, and ultimately causing the overall failure of the stroke sensor.

[0026] The utility model provides a kind of stroke sensor induction magnetic ring with high reliability. By optimizing the structure design, effectively prevent high-pressure liquid in hydraulic support from invading induction magnetic ring, so as to protect the internal boron steel magnet from the influence of moisture and high pressure environment, improve the stability and durability of product, ensure that it can maintain performance in long-term use without replacement, significantly improve the safety and efficiency of hydraulic support operation.

[0027] The specific implementation of the stroke sensor induction magnetic ring of the utility model will be described below. Figures 1 to 4

[0028] As shown in Figure 1 The utility model provides a kind of stroke sensor induction magnetic ring, comprising: inner ring part 10, set up in the piston rod of hydraulic support jack, the outer periphery of inner ring part 10 is provided with installation groove 11;Outer ring part 20, sealing cover is set to the outer periphery of inner ring part 10, to form sealed space between the inner periphery of outer ring part 20 and installation groove 11;Magnetic piece 30, is set in installation groove 11.The stroke sensor induction magnetic ring realizes the effect of preventing high-pressure emulsion from invading and protecting magnetic piece 30 from moisture and pressure damage by optimizing the sealing structure design.

[0029] Specifically, the stroke sensor induction magnetic ring utilizes the close fit between outer ring part 20 and inner ring part 10 to create an effective barrier, preventing liquids and impurities in the external environment from entering the interior of installation groove 11. Outer ring part 20 not only plays a mechanical protection role, but also provides an additional sealing layer, ensuring that magnetic piece 30 can maintain its original performance unaffected even under extreme working conditions, such as high pressure and high humidity environment, allowing magnetic piece 30 to work in a relatively stable and controlled environment, thereby improving the overall reliability and life of the stroke sensor.

[0030] ​The outer ring part 20 can be made of corrosion-resistant, high-strength engineering plastics or metal alloys, and the sealing method between the outer ring part 20 and the inner ring part 10 can be selected from O-rings, lip seals or other forms of seals to enhance the sealing effect. The magnetic member 30 can be various types of permanent magnets, etc., and is preferably a ferritic boron magnet, which has high residual magnetism and coercive force, can provide a larger magnetic field in a smaller volume, and is suitable for application scenarios with limited size and weight. Although the ferritic boron magnet is susceptible to moisture and pressure, it can effectively avoid these problems under the sealing protection provided by the utility model, ensuring long-term stable magnetic performance.

[0031] Further, according to the stroke sensor sensing magnetic ring of the utility model, the cooperation mode between the outer circumferential surface of the inner ring part 10 and the inner circumferential surface of the outer ring part 20 is interference fit. Specifically, the inner diameter of the outer ring part 20 is slightly smaller than the outer diameter of the inner ring part 10, so that a certain force needs to be applied to complete the assembly when the outer ring part 20 is sleeved into the inner ring part 10. The interference fit assembly mode ensures close contact between the two, thereby forming an effective mechanical connection and sealing effect. During installation, the interference fit can be achieved by hot mounting, cold shrinking or pressing, etc. By adopting the interference fit mode, the stroke sensor sensing magnetic ring provided by the utility model not only enhances the mechanical strength and sealing performance, but also simplifies the assembly process, improves the durability and stability of the product.

[0032] As shown in Figure 2 According to the stroke sensor sensing magnetic ring of the utility model, the inner circumferential surface of the outer ring part 20 is provided with an inner ring limiting step 21 for stopping one end of the inner ring part 10. Specifically, the inner ring limiting step 21 forms a stepped structure on the inner side of the outer ring part 20, and in the assembled state, one end of the inner ring part 10 touches the stepped structure, thereby preventing the inner ring part 10 from moving further inward. The inner ring limiting step 21 ensures the precise positioning of the inner ring part 10 during assembly and prevents axial displacement between the inner ring part 10 and the outer ring part 20 due to external impact or vibration during use. Preferably, in the assembled state, the stepped structure of the inner ring part 10 and the outer ring part 20 is complementary, and there is no additional structural gap on the inner and outer circumferential sides of the overall structure, which not only has a simple appearance, but also has a compact structure, suitable for installation in limited space.

[0033] As shown in Figure 3As shown, the inner ring limiting step 21 is preferably also provided with an end face assembly hole matching the axial end of the inner ring part 10, and an axial fixing effect between the outer ring part 20 and the inner ring part 10 can be additionally provided by fasteners such as bolts. Specifically, in the installed state of the inner ring part 10 and the outer ring part 20, the axial one end of the inner ring part 10 contacts the inner ring limiting step 21. By passing through the assembly hole and fastening with fasteners such as bolts, the inner ring limiting step 21 and the axial end of the inner ring part 10 can be fixed.

[0034] Further, according to the stroke sensor sensing magnetic ring of the utility model, on the adjacent position of one side of the installation groove 11, the outer circumferential surface of the inner ring part 10 is provided with a first annular groove 12, and a first O-shaped ring 13 is arranged in the first annular groove 12; in the assembled state of the inner ring part 10 and the outer ring part 20, the distance between the first annular groove 12 and the inner ring limiting step 21 is greater than the distance between the installation groove 11 and the inner ring limiting step 21. Specifically, the first annular groove 12 and the first O-shaped ring 13 inside it are located on the upstream side of the installation groove 11, that is, on the side away from the inner ring limiting step 21. When the hydraulic support jack is working, even if the emulsion pressure increases, the liquid on the upstream side first contacts the first O-shaped ring 13, thereby providing a sealing barrier. The first O-shaped ring 13 can effectively block the emulsion from entering the installation groove 11 from the upstream side, thereby protecting the magnetic part 30 from direct impact of high-pressure liquid.

[0035] Further, according to the stroke sensor sensing magnetic ring of the utility model, on the adjacent position of the other side of the installation groove 11, the outer circumferential surface of the inner ring part 10 is provided with a second annular groove 14, and a second O-shaped ring 15 is arranged in the second annular groove 14. Specifically, the second annular groove 14 and the second O-shaped ring 15 inside it are located on the downstream side of the installation groove 11, that is, on the side close to the inner ring limiting step 21, thereby providing a sealing defense line on the downstream side of the installation groove 11, resisting the high-pressure emulsion that may invade from the inside of the sensing magnetic ring, and further enhancing the sealing effect.

[0036] Through the combination of the first O-shaped ring 13 and the second O-shaped ring 15, the stroke sensor sensing magnetic ring realizes a bidirectional sealing mechanism. This design significantly improves the sealing effect, reduces the risk of invasion of high-pressure emulsion from both sides, and ensures the continuous and reliable operation and high-precision performance of the stroke sensor sensing magnetic ring in harsh working environments.

[0037] As Figure 4As shown, the outer peripheral surface of the inner ring part 10 is provided with an outer ring limiting step 16 for stopping one end of the outer ring part 20. Specifically, during the assembly of the outer ring part 20 to the inner ring part 10, the outer ring limiting step 16 is located on the outer peripheral surface of the inner ring part 10, thereby preventing the outer ring part 20 from further moving. The step ensures that the outer ring part 20 can be accurately positioned during installation, and prevents axial displacement between the inner ring part 10 and the outer ring part 20 during use due to external impact or vibration.

[0038] The implementation of the outer ring limiting step 16 can be combined with the implementation of the inner ring limiting step 21 described above. Specifically, the inner ring limiting step 21 and the outer ring limiting step 16 work together to provide axial positioning from both the inner and outer sides, so that the inner ring part 10 and the outer ring part 20 form an approximately standard cylindrical structure in the assembled state, with a simple appearance and compact structure.

[0039] Preferably, according to the travel sensor induction magnetic ring of the utility model, the inner ring part 10 is provided with a plurality of mounting grooves 11; the plurality of mounting grooves 11 are uniformly distributed around the circumferential direction of the inner ring part 10. Specifically, the plurality of mounting grooves 11 are uniformly distributed along the circumferential direction of the inner ring part 10, ensuring that the magnetic pieces 30 can provide consistent magnetic field strength and induction performance in all directions. By providing a plurality of mounting grooves 11, the risk of failure of a single magnetic piece 30 can be dispersed. If a magnetic piece 30 in one mounting groove 11 fails, the other magnetic pieces 30 can still work normally, thereby ensuring the continuous and reliable operation of the entire induction magnetic ring. By providing a plurality of mounting grooves 11 uniformly distributed in the circumferential direction on the inner ring part 10, the travel sensor induction magnetic ring provided by the utility model not only improves the measurement accuracy and reliability, but also optimizes the magnetic field distribution and enhances the ability to adapt to complex environments.

[0040] Further, according to the travel sensor induction magnetic ring of the utility model, in the plurality of mounting grooves 11, the same polarity of the magnetic pieces 30 relative to the radial direction of the inner ring part 10 is either inward or outward. Specifically, the same polarity (e.g. N or S) of all magnetic pieces 30 is directed towards the radial inside or outside of the inner ring part 10, ensuring that the magnetic field direction generated by the magnetic pieces 30 is consistent, thereby forming a uniform and concentrated magnetic field environment, which helps to improve the consistency and stability of the induction signal and reduce measurement errors caused by uneven magnetic fields.

[0041] Preferably, according to the travel sensor induction magnetic ring of the utility model, the surface of the magnetic piece 30 is coated with a sealing glue layer. The surface of the magnetic piece 30 is coated with a layer of sealing glue, which can effectively isolate high-pressure emulsion, moisture and other corrosive substances in the external environment, protecting the magnetic piece 30 from chemical corrosion and physical damage.

[0042] On the other hand, the magnetic piece 30 is preferably arranged at the bottom of the mounting groove 11, and the mounting groove 11 above the magnetic piece 30 can also be filled with sealant. Specifically, the sealant not only plays a sealing role, but also serves as a fixing medium to firmly bond the magnetic piece 30 in the mounting groove 11, preventing position deviation caused by vibration or impact. The sealant completely fills the gap between the mounting groove 11 and the magnetic piece 30, further improving the sealing performance of the overall structure and effectively blocking the intrusion of high-pressure emulsion.

[0043] Through the above-mentioned method of coating the surface of the magnetic piece 30 with a sealant layer and filling the mounting groove 11 with sealant, the stroke sensor sensing magnetic ring provided by the utility model not only realizes effective protection and fixation of the magnetic piece 30, but also significantly improves the sealing performance and service life of the product, ensuring its continuous and reliable operation under complex working conditions.

[0044] According to the stroke sensor sensing magnetic ring of the preferred embodiment of the utility model, at least three reliable pressure-resistant sealing means are provided for the magnetic piece 30 through the sealing installation mode (interference fit) of the outer ring part 20 and the inner ring part 10, the combination of the first O-shaped ring 13 and the second O-shaped ring 15, and the method of coating the surface of the magnetic piece 30 with a sealant layer and filling the mounting groove 11 with sealant.

[0045] Specifically, the interference fit assembly mode is adopted between the outer ring part 20 and the inner ring part 10 to ensure that the two are in close contact and form a firm mechanical connection, while creating an effective first sealing barrier between the outer ring part 20 and the inner ring part 10 to prevent the intrusion of external high-pressure emulsion. The first O-shaped ring 13 and the second O-shaped ring 15 are embedded in the first annular groove 12 and the second annular groove 14 respectively arranged on both sides of the mounting groove 11, and the two work together to form a bidirectional sealing mechanism. The surface of the magnetic piece 30 is coated with a sealant layer to directly protect it from corrosion and physical damage; at the same time, the mounting groove 11 above the magnetic piece 30 is filled with sealant, which not only realizes the stable fixation of the magnetic piece 30, but also fills all possible gaps to form the last line of defense against high-pressure emulsion.

[0046] Through the comprehensive application of the above-mentioned sealing means, the stroke sensor sensing magnetic ring provided by the utility model can maintain excellent sealing performance in extreme working environments, effectively protect the magnetic piece 30 from the influence of high-pressure emulsion environment, and ensure long-term stable operation.

[0047] The hydraulic support stroke detection device provided by the utility model is described below, and the hydraulic support stroke detection device described below can be correspondingly referred to the stroke sensor sensing magnetic ring described above.

[0048] The utility model provides a kind of hydraulic support stroke detection device, including stroke sensor and the stroke sensor induction magnetic ring of above implementation mode.Stroke sensor is set to the outside of hydraulic support jack, for detecting the moving distance of piston rod and converting it into electrical signal;While stroke sensor induction magnetic ring is installed on the piston rod of jack, and piston rod synchronous movement is moved.The induction magnetic ring adopts interference fit, double O-ring seal and the mode that magnetic piece 30 surface is coated with seal glue layer and installs groove 11 and injects glue, provides at least three reliable compression seal means, ensure that magnetic piece 30 is not influenced by high pressure emulsion and harsh environment.Hydraulic support stroke detection device not only realizes high-precision displacement measurement, also enhances the stability and durability of system, especially suitable for complex working environment such as coal mine underground.

[0049] The hydraulic support stroke detection device utilizes optimized magnetic field distribution and stable induction mechanism to ensure real-time monitoring of the moving distance of the hydraulic support push jack and the accuracy of the working face straightness control. The design of the inner and outer ring limiting steps 16 and the secure fixation of the magnetic piece 30 ensure that the stroke sensor induction magnetic ring maintains good stability when subjected to pressure and vibration in different directions, reducing maintenance frequency and cost, and being particularly suitable for the operation requirements of the hydraulic support in the coal mine.

[0050] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the utility model embodiments. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or modes. In addition, the skilled in the art can combine and combine the different embodiments or modes described in the present specification and the characteristics of different embodiments or modes without contradiction.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A travel sensor sensing magnetic ring, characterized by, The application relates to a magnetic ring for a stroke sensor, which comprises an inner ring part (10) arranged on a piston rod of a hydraulic support jack, wherein an outer circumferential surface of the inner ring part (10) is provided with a mounting groove (11); an outer ring part (20) is arranged on the outer circumferential surface of the inner ring part (10) to form a sealed space between an inner circumferential surface of the outer ring part (20) and the mounting groove (11); and a magnetic part (30) is arranged in the mounting groove (11). The cooperation mode between the outer circumferential surface of the inner ring part (10) and the inner circumferential surface of the outer ring part (20) is interference fit. The inner circumferential surface of the outer ring part (20) is provided with an inner ring limiting step (21) for stopping one end of the inner ring part (10). On one side of the mounting groove (11), the outer circumferential surface of the inner ring part (10) is provided with a first annular groove (12), and a first O-shaped ring (13) is arranged in the first annular groove (12).

2. The travel sensor sensing magnet ring of claim 1, wherein, In the assembled state of the inner ring part (10) and the outer ring part (20), the distance between the first annular groove (12) and the inner ring limiting step (21) is greater than the distance between the mounting groove (11) and the inner ring limiting step (21).

3. The travel sensor sensing magnet ring of claim 1, wherein, On the other side of the mounting groove (11), the outer circumferential surface of the inner ring part (10) is provided with a second annular groove (14), and a second O-shaped ring (15) is arranged in the second annular groove (14).

4. The travel sensor sensing magnet ring of claim 3, wherein, The outer circumferential surface of the inner ring part (10) is provided with an outer ring limiting step (16) for stopping one end of the outer ring part (20). The inner ring part (10) is provided with a plurality of mounting grooves (11).

5. The travel sensor sensing magnet ring of claim 4, wherein, The plurality of mounting grooves (11) are uniformly distributed around the circumferential direction of the inner ring part (10).

6. The travel sensor sensing magnet ring of claim 3, wherein, In the plurality of mounting grooves (11), the same polarity of the magnetic part (30) is all inward or all outward relative to the radial direction of the inner ring part (10).

7. The travel sensor sensing magnet ring according to any one of claims 1 to 6, characterized in that The surface of the magnetic part (30) is coated with a sealing glue layer. And / or, the magnetic part (30) is arranged at the groove bottom of the mounting groove (11), a sealing glue is injected into the mounting groove (11) above the magnetic part (30).

8. The travel sensor sensing magnet ring of claim 7, wherein, The application further relates to a stroke sensor and a stroke sensor sensing magnetic ring as claimed in any one of claims 1 to 9.

9. The stroke sensor sensing magnet ring according to any one of claims 1 to 6, characterized in that The stroke sensor is arranged outside a hydraulic support jack. The stroke sensor sensing magnetic ring is arranged on a piston rod of the hydraulic support jack.

10. A hydraulic support stroke detection device, characterized by, ​ ​ ​

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