CN215409921U

CN215409921U - Viscous damper with over-current protection

Info

Publication number: CN215409921U
Application number: CN202121714155.3U
Authority: CN
Inventors: 吕江; 李东超; 程震; 盛能军; 尹琪; 刘鹏飞; 张汉卫; 陶金峰; 谢世达
Original assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd; China Railway Bridge Research Technology Co Ltd
Current assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd; China Railway Bridge Research Technology Co Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-01-04
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a viscous damper with over-current protection, which relates to the technical field of dampers, and comprises: the cylinder comprises a cylinder barrel, a piston rod and a conductive connecting piece, wherein one end of the cylinder barrel is provided with an end cover; one end of the piston rod penetrates through the end cover and extends into the cylinder barrel, and the other end of the piston rod extends out of the cylinder barrel and is provided with an ear plate used for connecting a main beam; one end of the conductive connecting piece is connected with the end cover, and when the piston rod slides along the cylinder barrel, the other end of the conductive connecting piece is always in contact with the piston rod or the lug plate. According to the embodiment of the utility model, the end cover is always contacted with the piston rod or the lug plate through the conductive connecting piece, so that the viscous damper is electrified through the conductive connecting piece when the viscous damper is used as a conductor in the welding construction process, the gap discharge phenomenon cannot be generated, and the surface of the piston rod cannot be damaged.

Description

Viscous damper with over-current protection

Technical Field

The utility model relates to the technical field of dampers, in particular to a viscous damper with over-current protection.

Background

With the continuous development of bridge design and construction technology, the span of the bridge is continuously increased. The development and application of the viscous damper as a safety belt of a bridge under various vibration conditions become one of essential projects in the bridge construction process. The viscous damper has the working principle that a piston reciprocates in an oil cylinder, and fluid in the oil cylinder generates designed damping force under the condition of pressure difference of a left oil cylinder and a right oil cylinder, so that the safety of structural parts of a bridge under various vibration conditions is further protected. The pressure in the damper and the pressure difference between the left oil cylinder and the right oil cylinder are mainly ensured by the sealing element, so the reliability and the sealing property of the sealing element greatly influence the functional use of the viscous damper. At present, sealing elements at home and abroad are mainly made of insulating materials such as rubber and the like, and the service life of the materials can be prolonged to a certain extent.

However, in practical engineering projects, the phenomenon of abnormal leakage after the viscous damper which is tested well is installed is found, disassembly researches find that damage of different degrees occurs on the surface of the piston rod of the damper which leaves a factory well, and researches determine that the damage position is in a welding process, the damper serves as a conductor to form loop over current, and high-temperature electric arcs generated at the position of the piston rod cause damage to the surface of the piston rod. The specific phenomenon is that after the damper is installed, other constructors perform over-welding operation at the position around the damper. In the welding process, the damper is used as a conductor loop, a sealing element is arranged between the damper piston rod and the cylinder body, and a small gap exists, so that the damper is not a conductor, when the damper is used as an electric current of the welding loop, high-temperature electric sparks are generated at the gap between the sealing element and the piston rod, the surface of the piston rod is directly damaged, and when the damaged position passes through the sealing element, the sealing failure is caused by the irregular shape.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a viscous damper with over-current protection, which can solve the technical problem that the surface of a piston rod is damaged due to electric sparks generated in a gap between an end cover and the piston rod of the conventional viscous damper.

The embodiment of the utility model provides a viscous damper with over-current protection, which comprises:

the cylinder barrel is provided with an end cover at one end;

one end of the piston rod penetrates through the end cover and extends into the cylinder barrel, and the other end of the piston rod extends out of the cylinder barrel and is provided with an ear plate used for connecting a main beam;

and one end of the conductive connecting piece is connected with the end cover, and when the piston rod slides along the cylinder barrel, the other end of the conductive connecting piece is always in contact with the piston rod or the lug plate.

In some embodiments, the conductive connecting member includes a metal spring plate, one end of the metal spring plate is connected to the end cap, and the other end of the metal spring plate is always in contact with the piston rod when the piston rod slides along the cylinder.

In some embodiments, the conductive connecting member further includes a set screw, a through hole is formed at one end of the metal spring plate, and the set screw connects the metal spring plate with the end cap through the through hole.

In some embodiments, the metal spring plate is made of copper material.

In some embodiments, the conductive connecting member includes a metal connecting piece and a metal roller, one end of the metal connecting piece is connected with the end cover, the other end of the metal connecting piece is connected with the metal roller, and when the piston rod slides along the cylinder barrel, the metal roller rolls along the piston rod.

In some embodiments, the metal roller comprises two trapezoidal guide wheels arranged oppositely.

In some embodiments, the metal connecting sheet and the metal roller are both made of copper material.

In some embodiments, a telescopic dust-proof sleeve is disposed between the end cover and the ear plate, and the telescopic dust-proof sleeve is sleeved outside the piston rod.

In some embodiments, the conductive connector includes a wire having one end connected to the end cap and the other end connected to the ear plate.

In some embodiments, the wires are attached along the inner wall of the telescopic dust cover.

The technical scheme provided by the utility model has the beneficial effects that:

the embodiment of the utility model provides a viscous damper with over-current protection, wherein an end cover is always contacted with a piston rod or an ear plate through a conductive connecting piece, so that the viscous damper is over-current through the conductive connecting piece when the viscous damper is used as a conductor in the welding construction process, the gap discharge phenomenon cannot be generated, and the surface of the piston rod cannot be damaged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of a viscous damper with over-current protection according to an embodiment of the present invention;

FIG. 2 is another schematic diagram of a viscous damper with over-current protection according to an embodiment of the present invention;

FIG. 3 is a schematic view of the direction A-A of FIG. 2 according to an embodiment of the present invention;

FIG. 4 is a further schematic diagram of a viscous damper with over-current protection according to an embodiment of the present invention;

in the figure: 1. a cylinder barrel; 2. a piston rod; 3. a conductive connection member; 31. a metal spring piece; 32. tightening the screw; 33. a metal connecting sheet; 34. a metal roller; 35. a wire; 4. an end cap; 5. an ear plate; 6. a telescopic dustproof sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1, a viscous damper with over-current protection, the viscous damper comprising: cylinder 1, piston rod 2 and electrically conductive connecting piece 3.

The improved hydraulic cylinder is characterized in that an end cover 4 is arranged at one end of the cylinder barrel 1, one end of the piston rod 2 penetrates through the end cover 4 and extends into the cylinder barrel 1, the other end of the piston rod extends out of the cylinder barrel 1 and is provided with an ear plate 5 used for being connected with a main beam, one end of the conductive connecting piece 3 is connected with the end cover 4, and when the piston rod 2 slides along the cylinder barrel 1, the other end of the conductive connecting piece 3 is always in contact with the piston rod 2 or the ear plate 5.

According to the viscous damper with the over-current protection function, the conductive connecting piece 3 is arranged, the end cover 4 is always contacted with the piston rod 2 or the lug plate 5 through the conductive connecting piece 3, so that the viscous damper is over-current through the conductive connecting piece 3 when the viscous damper is used as a conductor in the welding construction process, the gap discharge phenomenon cannot be generated, and the surface of the piston rod cannot be damaged.

As an alternative embodiment, referring to fig. 1, in the viscous damper with over-current protection in the embodiment of the present invention, the conductive connecting member 3 includes a metal spring plate 31, one end of the metal spring plate 31 is connected to the end cap 4, and when the piston rod 2 slides along the cylinder 1, the other end of the metal spring plate 31 is always in contact with the piston rod 2. Because the metal spring piece 31 has certain elasticity and can effectively contact with the piston rod 2, the mode has the advantages of simple structure, low cost and price, easy replacement, small structural form and no influence on other parts.

Further, in the viscous damper with over-current protection in the embodiment of the present invention, the conductive connecting member 3 further includes a set screw 32, a through hole is formed at one end of the metal spring plate 31, and the set screw 32 connects the metal spring plate 31 and the end cover 4 through the through hole. Preferably, the metal spring piece is made of copper material.

As an alternative embodiment, referring to fig. 2 and 3, in the viscous damper with over-current protection in the embodiment of the present invention, the conductive connecting member 3 includes a metal connecting piece 33 and a metal roller 34, the metal connecting piece 33 is connected to the end cap 4 at one end and to the metal roller 34 at the other end, and when the piston rod 2 slides along the cylinder 1, the metal roller 34 rolls along the piston rod 2. The metal roller 34 is attached to the piston rod 2 in a rolling mode, damage to the piston rod 2 is small, the structure is simple, and cost and price are low. Further, the metal roller 34 includes two trapezoidal guide wheels disposed oppositely. The middle parts of the two trapezoidal guide wheels form a groove which can be perfectly attached to the piston rod 2, and the dislocation phenomenon caused by vibration or other improper movements can be avoided. Preferably, the metal connecting sheet 33 and the metal roller 34 are both made of copper material.

As an alternative embodiment, referring to fig. 1, fig. 2 and fig. 4, in the viscous damper with overvoltage protection in the embodiment of the present invention, a telescopic dust-proof sleeve 6 is disposed between the end cover 4 and the ear plate 5, and the telescopic dust-proof sleeve 6 is sleeved outside the piston rod 2. The telescopic dustproof sleeve 6 can effectively block the improper influence of the external environment on the piston rod 2. The telescopic dust-proof cover 6 can effectively protect the metal spring piece 31 and the set screw 32, and can also effectively protect the metal connecting piece 33 and the metal roller 34.

As an alternative embodiment, referring to fig. 4, in the viscous damper with over-current protection in the embodiment of the present invention, the conductive connecting member 3 includes a wire 35, and one end of the wire 35 is connected to the end cap 4, and the other end is connected to the ear plate 5. Further, the wire 35 is attached to the inner wall of the telescopic dust-proof sleeve 6.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; 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 by those skilled in the art according to specific situations.

It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A viscous damper with over-current protection, comprising:

the cylinder barrel (1), one end of the cylinder barrel (1) is provided with an end cover (4);

one end of the piston rod (2) penetrates through the end cover (4) and extends into the cylinder barrel (1), and the other end of the piston rod extends out of the cylinder barrel (1) and is provided with an ear plate (5) used for connecting a main beam;

the cylinder barrel comprises a conductive connecting piece (3), one end of the conductive connecting piece (3) is connected with an end cover (4), and when the piston rod (2) slides along the cylinder barrel (1), the other end of the conductive connecting piece (3) is always in contact with the piston rod (2) or an ear plate (5).

2. The viscous damper with over-current protection of claim 1, wherein:

the conductive connecting piece (3) comprises a metal spring piece (31), one end of the metal spring piece (31) is connected with the end cover (4), and when the piston rod (2) slides along the cylinder barrel (1), the other end of the metal spring piece is always in contact with the piston rod (2).

3. The viscous damper with over-current protection of claim 2, wherein:

the conductive connecting piece (3) further comprises a set screw (32), a through hole is formed in one end of the metal spring piece (31), and the set screw (32) is used for connecting the metal spring piece (31) with the end cover (4) through the through hole.

4. The viscous damper with over-current protection of claim 2, wherein: the metal spring piece is made of copper materials.

5. The viscous damper with over-current protection of claim 1, wherein:

the conductive connecting piece (3) comprises a metal connecting piece (33) and a metal roller (34), one end of the metal connecting piece (33) is connected with the end cover (4), the other end of the metal connecting piece is connected with the metal roller (34), and when the piston rod (2) slides along the cylinder barrel (1), the metal roller (34) rolls along the piston rod (2).

6. The viscous damper with over-current protection of claim 5, wherein: the metal roller (34) comprises two trapezoidal guide wheels which are oppositely arranged.

7. The viscous damper with over-current protection of claim 5, wherein: the metal connecting sheet (33) and the metal roller (34) are both made of copper materials.

8. The viscous damper with over-current protection of claim 1, wherein:

and a telescopic dustproof sleeve (6) is arranged between the end cover (4) and the ear plate (5), and the piston rod (2) is sleeved with the telescopic dustproof sleeve (6).

9. The viscous damper with over-current protection of claim 8, wherein:

the conductive connecting piece (3) comprises a wire (35), one end of the wire (35) is connected with the end cover (4), and the other end of the wire is connected with the ear plate (5).

10. The viscous damper with over-current protection of claim 9, wherein: the wire (35) is arranged along the inner wall of the telescopic dustproof sleeve (6) in a fitting mode.