阅读说明：本技术 一种密封装置及超声波探轮 (Sealing device and ultrasonic probe wheel ) 是由 刘振楠 周新航 雷刚 路纪亚 张剑 杨振芳 吴瑞民 于 2020-06-24 设计创作，主要内容包括：本发明涉及一种密封装置及超声波探轮,密封装置包括密封块和盘轴,盘轴具有贯穿其两端的盘轴通孔,密封块具有多个用于穿设线缆的密封块过线孔,盘轴通孔的至少一端具有内锥面,内锥面的直径由盘轴中部向端部逐渐增加,密封块设置至少一个,并具有与内锥面相适配的外锥面,密封块与盘轴通孔对应的端部过盈配合,且线缆与密封块过线孔过盈配合。本发明的有益效果是：针对超声波探轮的耦合液密封问题,能够方便快速的拆装探轮,改善密封性能,操作方便快捷,减少灌胶需要的干燥时间,提高探轮的组装效率,同时可有效提高探轮使用寿命,减少因探轮漏液而造成的探轮进气、内部压力降低等问题,提高探轮的检测质量。(The invention relates to a sealing device and an ultrasonic probe wheel, wherein the sealing device comprises a sealing block and a reel shaft, the reel shaft is provided with a reel shaft through hole penetrating through two ends of the reel shaft, the sealing block is provided with a plurality of sealing block wire passing holes for penetrating cables, at least one end of the reel shaft through hole is provided with an inner conical surface, the diameter of the inner conical surface is gradually increased from the middle part to the end part of the reel shaft, the sealing block is provided with at least one outer conical surface matched with the inner conical surface, the sealing block is in interference fit with the end part corresponding to the reel shaft through hole, and the cables are in interference fit with the sealing block wire passing holes. The invention has the beneficial effects that: the coupling liquid that surveys the wheel to the ultrasonic wave seals the problem, and the wheel is visited in dismouting that can make things convenient for quick, improves sealing performance, and convenient operation is swift, reduces the drying time that the encapsulating needs, improves the packaging efficiency who surveys the wheel, can effectively improve simultaneously and visit wheel life, reduces because of visiting the wheel weeping and cause the spy wheel admit air, internal pressure reduces the scheduling problem, improves the detection quality who surveys the wheel.)

1. The utility model provides a sealing device, includes sealed piece (2) and dish axle (3), dish axle (3) have the dish axle through-hole that runs through its both ends, sealed piece (2) have a plurality of sealed pieces that are used for wearing to establish the cable and cross line hole (21), its characterized in that, at least one end of dish axle through-hole has interior conical surface, the diameter of interior conical surface by dish axle (3) middle part increases gradually to the tip, sealed piece (2) set up at least one to have with the outer conical surface of interior conical surface looks adaptation, sealed piece (2) with the tip interference fit that dish axle through-hole corresponds, just the cable with sealed piece crosses line hole (21) interference fit.

2. The sealing device according to claim 1, characterized in that the sealing block (2) is made of plastic material, and further comprises a threaded retainer ring (1), the threaded retainer ring (1) is provided with a retainer ring threading hole (13) for threading a cable, and the threaded retainer ring (1) is in threaded connection with the end of the disk shaft through hole and abuts against one end of the sealing block (2) far away from the middle part of the disk shaft (3).

3. A sealing arrangement according to claim 2, characterized in that the end face of the threaded collar (1) remote from the sealing block (2) is provided with at least one process bore (12).

4. A sealing arrangement according to any one of claims 1-3, characterised in that the axis of the block passage hole (21) is angled with respect to the outer cone.

5. The sealing device applied to the probe wheel of claim 4, wherein the sealing block wire passing hole (21) is gradually close to the axis of the sealing block (2) from the middle part to the end part of the disk shaft (3).

6. A sealing arrangement according to claim 5, characterised in that a plurality of said block thread through holes (21) are evenly distributed circumferentially around the axis of the sealing block (2).

7. A sealing device according to any one of claims 1 to 3, wherein said inner conical surface is provided at both ends of said disc shaft through hole, and said sealing blocks (2) are two, and two of said sealing blocks (2) are respectively provided at both ends of said disc shaft through hole.

8. A sealing arrangement according to any one of claims 1-3, characterized in that the disc shaft (3) is made of a corrosion resistant material.

9. An ultrasonic probe comprising a sealing device according to any one of claims 1 to 8.

10. The ultrasonic probe wheel of claim 9, further comprising a wheel film, a probe and a cable, wherein the wheel film is rotatably mounted on the disc shaft (3), the probe is fixed in the wheel film, the wheel film is filled with coupling liquid, one end of the cable extends into the wheel film and is connected with the probe, and the other end of the cable passes through the sealing block wire through hole (21) and extends out of the disc shaft (3).

Technical Field

The invention relates to the field of rail ultrasonic detection, in particular to a sealing device and an ultrasonic detection wheel, and is particularly suitable for a detection wheel of a rail flaw detection vehicle.

Background

With the rapid development of railways, the safety of steel rails has gained particular attention. The rail nondestructive detection technology is widely applied to railways, and the ultrasonic flaw detection trolley on the railways makes great contribution to the detection of the rails for a long time, but the development of the flaw detection trolley technology is delayed seriously. The single-rail hand-push type detection speed is low, the manual interference factor is large, and the control technology difficulty is high. In recent years, double-rail steel rail flaw detectors are rapidly developed, and ultrasonic detection wheels are adopted as flaw detection devices. The probe is placed in the coupling liquid by the probe wheel of the ultrasonic wave, the probe wheel rolls on the steel rail, and the probe transmits the ultrasonic wave to detect the flaw of the steel rail, so that the technology is mature gradually and is applied rapidly.

The ultrasonic detection wheel is a key component of a double-rail steel rail ultrasonic flaw detector, and mainly comprises a probe module, a probe frame, a wheel film, coupling liquid, a disc set module and the like, wherein the probe module is arranged in the coupling liquid in the wheel film, a wire on the probe is connected with the outside through the disc set module, the disc set module supports the movement of devices in the wheel film and also seals the coupling liquid in the wheel film, a connecting wire of the probe needs to be connected with the outside through a disc set, and the operation of the detection wheel cannot be influenced due to the phenomenon that liquid leakage cannot be generated. This place is one of the probe wheel design points.

The existing method generally adopts a manual mode, the cable is sealed with a threading hole and the sealing block is sealed with the disc shaft by pouring glue into the disc shaft of the disc group module, the sealing effect of the glue is uneven and easy to generate liquid leakage due to the influence of human experience factors, the glue needs the solidification time of generally 2-3 days, the working efficiency is seriously lagged, and meanwhile, the detection wheel is damaged when being detached and maintained, and the use performance of the detection wheel is restricted.

Disclosure of Invention

The invention aims to solve the technical problem of how to improve the sealing performance of the probe wheel disc shaft and facilitate disassembly, assembly and maintenance.

The technical scheme for solving the technical problems is as follows: the utility model provides a sealing device, includes sealed piece and dish axle, the dish axle has the dish axle through-hole that runs through its both ends, sealed piece has a plurality of sealed pieces that are used for wearing to establish the cable and crosses the line hole, at least one end of dish axle through-hole has interior conical surface, the diameter of interior conical surface by dish axle middle part increases gradually to the tip, sealed piece sets up at least one, and have with the outer conical surface of interior conical surface looks adaptation, sealed piece with the tip interference fit that dish axle through-hole corresponds, just the cable with sealed piece crosses line hole interference fit.

The invention has the beneficial effects that: the outer conical surface of the sealing block and the inner conical surface of the disc shaft are matched and pressed tightly, the cables are gradually squeezed tightly relative to the wire passing holes of the sealing block on the sealing block due to the effect of the conical surface, sealing is achieved, sealing between the sealing block and the cables is guaranteed, sealing performance between the sealing block and the disc shaft is guaranteed, and leakage of internal coupling liquid is avoided. The method is simple to operate, has good operability, and reduces interference of human factors. Because there is not encapsulating between dish axle and the sealing block, need not wait for a long time, directly can carry out next step's process, make things convenient for the dismouting maintenance of probe, save the time, improve efficiency. The coupling liquid that surveys the wheel to the ultrasonic wave seals the problem, and the wheel is visited in dismouting that can make things convenient for quick, improves sealing performance, and convenient operation is swift, reduces the drying time that the encapsulating needs, improves the packaging efficiency who surveys the wheel, can effectively improve simultaneously and visit wheel life, reduces because of visiting the wheel weeping and cause the spy wheel admit air, internal pressure reduces the scheduling problem, improves the detection quality who surveys the wheel.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the sealing block is made of plastic materials and further comprises a thread retainer ring, the thread retainer ring is provided with a retainer ring thread passing hole for penetrating a cable, and the thread retainer ring is in threaded connection with the end part of the through hole of the disc shaft and is abutted against one end, far away from the middle part of the disc shaft, of the sealing block.

The beneficial effect of adopting the further scheme is that: the sealing block has high elasticity, high waterproof performance and high sealing performance. The screw retainer ring is in threaded connection with the through hole of the disc shaft and extrudes the sealing block, so that the inner conical surface and the outer conical surface can be completely compressed, the sealing performance can be better improved, and the hidden trouble caused by unreasonable sealing devices is completely eradicated by double sealing.

Further, the end face, far away from the sealing block, of the threaded retainer ring is provided with at least one process hole.

The beneficial effect of adopting the further scheme is that: the process hole is convenient for inserting a tool, and the threaded retainer ring is rotated by the tool, so that the operation is convenient and fast.

Furthermore, an included angle is formed between the axis of the sealing block wire passing hole and the outer conical surface.

The beneficial effect of adopting the further scheme is that: in the process that the sealing block extrudes in the through hole of the disc shaft, due to the existence of the inner conical surface and the outer conical surface, the sealing block is subjected to extrusion force perpendicular to the outer conical surface, when the axis of the line passing hole of the sealing block and the outer conical surface form an included angle, compared with the situation that the axis of the line passing hole of the sealing block is parallel to the outer conical surface, the deformation of the line passing hole of the sealing block is larger, the interference between the line passing hole of the sealing block and a cable is larger, and the sealing effect is better.

Further, the sealing block wire passing hole is gradually close to the axis of the sealing block from the middle part to the end part of the disc shaft.

The beneficial effect of adopting the further scheme is that: the sealing block is larger in deformation of the wire passing hole, and the sealing effect is better.

Further, a plurality of the sealing block wire passing holes are uniformly distributed around the axis of the sealing block along the circumferential direction.

The beneficial effect of adopting the further scheme is that: the sealing block wire passing holes are uniform in stress and identical in deformation, so that each sealing block wire passing hole can be well sealed.

Furthermore, the inner conical surface is arranged at two ends of the disc shaft through hole, the number of the sealing blocks is two, and the two sealing blocks are respectively arranged at two ends in the disc shaft through hole.

The beneficial effect of adopting the further scheme is that: both ends all set up sealed piece, double-seal, and the reliability is high.

Further, the disc shaft is made of a corrosion-resistant material.

The beneficial effect of adopting the further scheme is that: the disc shaft can adapt to coupling liquid with various pH values and severe working conditions.

The invention also relates to an ultrasonic probe wheel comprising the sealing device.

The disc shaft is rotatably arranged on the disc shaft, the probe is fixed in the disc film, coupling liquid is filled in the disc film, one end of the cable extends into the disc film and is connected with the probe, and the other end of the cable penetrates through the sealing block wire passing hole and extends out of the disc shaft.

Drawings

FIG. 1 is a view showing the construction of a sealing device according to the present invention;

FIG. 2 is a front view of the seal block of the present invention;

FIG. 3 is a left side view of the seal block of the present invention;

FIG. 4 is a front view of the threaded retainer of the present invention;

FIG. 5 is a left side view of the threaded retainer of the present invention;

FIG. 6 is a perspective view of an ultrasonic probe wheel of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the ultrasonic detection wheel comprises a threaded retainer ring, 12 process holes, 13 retainer ring line holes, 2 sealing blocks, 21 sealing blocks and 3 disc shafts, 4 ultrasonic detection wheels.

Detailed Description

The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

As shown in fig. 1-5, the present embodiment relates to a sealing device, which includes a sealing block 2 and a reel 3, the reel 3 has a reel through hole penetrating through both ends thereof, the sealing block 2 has a plurality of sealing block wire passing holes 21 for passing through a cable, at least one end of the reel through hole has an inner conical surface, the diameter of the inner conical surface gradually increases from the middle part to the end part of the reel 3, the sealing block 2 is provided with at least one and has an outer conical surface adapted to the inner conical surface, the sealing block 2 is in interference fit with the end part corresponding to the reel through hole, and the cable is in interference fit with the sealing block wire passing holes 21.

Specifically, as shown in fig. 1, the sealing block 2 is in a circular truncated cone shape, the middle of the disk shaft through hole is a cylindrical through hole with an equal diameter, and the end of the disk shaft through hole is a conical inner taper hole.

Specifically, in this embodiment, the sealing block 2 may be pressed into the through hole of the disc shaft by using a tool, or the following further embodiment of this embodiment may be adopted.

Specifically, the sealing block 2 is in interference fit with the through hole of the disc shaft and in interference fit with the cable, and can be assembled in a mode of expansion with heat and contraction with cold. More preferably: sealing block 2 adopts moulding material, wears to establish the sealing block earlier in the line hole 21 with the cable, then fills in sealing block 2 in the interior cone, sealing block 2 is owing to have plasticity to sealing block is crossed line hole 21 and is compressed to and cable interference fit, outer conical surface and dish axle through-hole interference fit.

As a further scheme of this embodiment, the sealing block 2 is made of a plastic material, and further includes a threaded retainer ring 1, the threaded retainer ring 1 has a retainer ring threading hole 13 for threading a cable, and the threaded retainer ring 1 is in threaded connection with an end portion of the disk shaft through hole and abuts against one end of the sealing block 2, which is far away from the middle portion of the disk shaft 3.

Specifically, as shown in fig. 1, the outer end of the inner taper hole is provided with a cylindrical inner thread hole.

The sealing device of this embodiment, thread retainer ring 1 can extrude sealing washer 2 when being connected through screw thread and dish axle 3, makes the external conical surface of sealing washer 2 is under thread retainer ring 1's extrusion, and receive pressure gradually and produce deformation to make sealing washer 2 move in to the interior taper hole of dish axle 3, sealing washer 2 removes to the little one end of interior taper hole diameter gradually, because the external conical surface diameter of sealing washer 2 is greater than the interior taper hole of dish axle 3, make sealing washer 2 more crowded tighter and tighter in dish axle 3 interior taper hole department, the cable passes sealed block wire passing hole 21 simultaneously, along with sealed block 2 by the extrusion, the gap between cable and sealed block wire passing hole 21 reduces gradually, disappear until the gap, thereby reach complete sealing. The size of deformation of the sealing block 2 and the force extruding into the disc shaft 3 can be controlled by adjusting the screwing force of the threaded retainer ring 1, so that the leakage of coupling liquid between the sealing block 2 and the disc shaft 3 is avoided.

In this embodiment, the sealing between the sealing block 2 and the disc shaft 3 is realized by forcing the sealing block 2 to be tightly pressed against the disc shaft 3 from outside to inside by the threaded retainer ring 1. The sealing structure in the related technology adopts the structure that the large-diameter cylindrical sealing ring is plugged into the small-diameter cylindrical hole, the sealing ring is tightly extruded by the diameter difference, and because the diameter of the sealing ring is larger than that of the hole, if the external force action is not uniform during assembly, the sealing ring is easy to deform or damage, so the assembly difficulty of the sealing ring is higher.

As a further development of this embodiment, the end face of the threaded collar 1 remote from the sealing block 2 has at least one passage opening 12.

Specifically, as shown in fig. 4 to 5, a retainer threading hole 13 for threading a cable is formed in the middle of the threaded retainer 1, the process holes 12 are formed around the end of the threaded retainer 1, and the process holes 12 may be cylindrical holes or hexagonal holes, or holes of other shapes. The technical hole 12 is arranged to facilitate the insertion of a wrench, so that the threaded retainer ring 1 is rotated to push the sealing block 2 into the through hole of the disc shaft, the installation and the disassembly are convenient, and the compression degree of the sealing block 2 is convenient to adjust.

As a further solution of this embodiment, the axis of the sealing block wire through hole 21 and the outer conical surface form an included angle.

As a further solution of this embodiment, the seal block through hole 21 gradually approaches the axis of the seal block 2 from the middle of the disc shaft 3 to the end.

As a further solution of this embodiment, a plurality of the seal block wire through holes 21 are uniformly distributed in the circumferential direction around the axis of the seal block 2.

As a further scheme of this embodiment, the inner conical surface is provided at both ends of the through hole of the disc shaft, the number of the sealing blocks 2 is two, and the two sealing blocks 2 are respectively disposed at both ends of the through hole of the disc shaft.

As a further version of this embodiment, the disc shaft 3 is made of a corrosion-resistant material.

Specifically, the threaded retainer ring 1 and the disc shaft 3 are made of corrosion-resistant materials, preferably stainless steel, and other corrosion-resistant materials can be adopted, so that the coupling liquid has better corrosion resistance and cannot react with the coupling liquid.

As shown in fig. 6, the present embodiment further provides an ultrasonic probe including the sealing device.

As a further scheme of this embodiment, the disc shaft type coupling device further includes a wheel film, a probe and a cable, the wheel film is rotatably mounted on the disc shaft 3, the probe is fixed in the wheel film, coupling liquid is filled in the wheel film, one end of the cable extends into the wheel film and is connected with the probe, and the other end of the cable passes through the sealing block wire passing hole 21 and extends out of the disc shaft 3.

Specifically, the outside of dish axle 3 has the installation department that is used for the installation bearing and other spy wheel parts, the wheel membrane pass through the bearing with dish axle 3 rotates and connects, still the cover is equipped with the sealing washer on the dish axle 3, the sealing washer is used for sealing dish axle 3 with take turns the clearance between the membrane.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.