Novel self-resetting multi-yield shock absorber and working method thereof

Abstract

The invention relates to the technical field of electrical equipment shock absorption, and provides a novel self-resetting multi-yield shock absorber and a working method thereof.The novel self-resetting multi-yield shock absorber comprises an upper bottom plate, a lower bottom plate, a self-resetting spring, an inner sleeve, an energy consumption inner core and an outer sleeve, the length of the energy consumption inner core is equal to that of the self-reset spring in the free state, the length of the inner sleeve and the length of the outer sleeve are smaller than that of the energy consumption inner core, the two ends of the energy consumption inner core and the two ends of the self-reset spring are fixedly connected with the upper bottom plate and the lower bottom plate respectively, and the bottom ends of the inner sleeve and the outer sleeve are fixedly connected with the lower bottom plate; the energy dissipation inner core is divided into a plurality of yield sections, each yield section is provided with a plurality of limiting grooves with the same length, the number and the length of the limiting grooves formed in different yield sections are different, and the energy dissipation capacity of each yield section is jointly controlled by the number and the length of the limiting grooves. Multi-stage yield energy dissipation can be achieved, energy dissipation and shock absorption can be achieved in both small earthquakes and strong earthquakes, and the shock absorption efficiency is obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorption of electrical equipment, and in particular to a novel self-resetting multi-yield shock absorber and a working method thereof. Background Art

[0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] At present, the distribution of energy bases and power loads is uneven, and many substations or converter stations are inevitably built in high-intensity areas. However, more than 3 / 5 of the key equipment in substations or converter stations are pillar-type electrical equipment (such as lightning arresters, current and voltage transformers, etc.), which usually use porcelain materials to ensure that they have good insulation properties. In order to meet the requirements of electrical clearance, pillar-type electrical equipment is thin and tall in appearance, and it is difficult to take into account the seismic performance in design and manufacturing. Therefore, pillar-type electrical equipment is seriously damaged by earthquakes. At present, the shock absorption control of pillar-type electrical equipment mostly adopts the method of connecting the electrical equipment and the bracket with shock-absorbing bolts. This method is simple and easy to implement, and can achieve effective energy consumption under strong earthquakes. However, under small earthquakes, the shock-absorbing bolts do not play a shock-absorbing role; at the same time, after shock absorption, there will be residual displacement after the earthquake, and the electrical equipment is prone to adverse effects such as cumulative tilt and offset.

[0004] Therefore, it is necessary to develop a shock absorbing device which can play a shock absorbing role in both small earthquakes and strong earthquakes and has a self-resetting function. Summary of the invention

[0005] In order to address the deficiencies in the prior art, the present invention provides a novel self-resetting multi-yield shock absorber and a working method thereof. The energy dissipation capacity of different yield sections is controlled by the number and length of limit grooves, thereby realizing multi-stage yield energy dissipation. Energy dissipation and shock absorption can be achieved in both small and strong earthquakes, and the shock absorption efficiency is significantly improved. The shock absorber also has a self-resetting function, which can significantly reduce the post-earthquake residual displacement of the shock absorber, prevent the upper electrical equipment from experiencing adverse effects such as cumulative tilt and offset, and no replacement is required after the earthquake.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A first aspect of the present invention provides a novel self-resetting multi-yield shock absorber.

[0007] A novel self-resetting multi-yield shock absorber comprises an upper base plate, a lower base plate, and a self-resetting spring, an inner sleeve, an energy-absorbing inner core and an outer sleeve which are sequentially sleeved from the inside to the outside; The energy-absorbing inner core and the self-resetting spring in a free state are of equal length, the lengths of the inner sleeve and the outer sleeve are both shorter than the length of the energy-absorbing inner core, the two ends of the energy-absorbing inner core and the self-resetting spring are respectively fixedly connected to the upper bottom plate and the lower bottom plate, and the bottom ends of the inner sleeve and the outer sleeve are both fixedly connected to the lower bottom plate; The energy-absorbing inner core is divided into a plurality of yield sections, each of which is provided with a plurality of limit grooves of equal length. The number and length of the limit grooves provided in different yield sections are different, and the energy-absorbing capacity of each yield section is jointly controlled by the number and length of the limit grooves.

[0008] Furthermore, a limiting bolt is arranged in each limiting groove of the yield section with the strongest energy dissipation capacity.

[0009] Furthermore, the limiting bolt is in an I-shaped structure with a thin middle and thick ends, through holes are provided on the inner sleeve and the outer sleeve, and the two ends of the limiting bolt pass through the through holes on the inner sleeve and the outer sleeve respectively.

[0010] Furthermore, the length of the energy dissipation inner core satisfies: Lh-Ln=(∑Lxi)-Ls Among them, Lh is the length of the energy-absorbing inner core, Ln is the length of the inner sleeve or the outer sleeve, Lxi is the length of the limit groove opened in the i-th yield section, and Ls is the minimum diameter of the limit bolt.

[0011] Furthermore, the outer edge of the self-resetting spring contacts the end of the limiting bolt.

[0012] Furthermore, the space between the energy-absorbing inner core and the outer sleeve, and the space between the inner sleeve and the energy-absorbing inner core are filled with a non-adhesive sliding material, a polytetrafluoroethylene sheet.

[0013] Furthermore, the energy dissipation inner core is divided into two yield sections, the first yield section includes four limit grooves of equal length, and the second yield section includes two limit grooves of equal length.

[0014] Furthermore, the inner sleeve and the outer sleeve are both made of Q345 round tubes, and the energy-absorbing inner core is made of Q235 steel tubes.

[0015] Furthermore, the inner sleeve and the outer sleeve are of equal length.

[0016] The second aspect of the present invention provides a working method of a novel self-resetting multi-yield shock absorber as described in the first aspect, comprising the following steps: When an earthquake occurs, each yield section dissipates energy and reduces shock in turn according to the strength of its energy dissipation capacity.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The novel self-resetting multi-yield shock absorber described in the present invention controls the energy dissipation capacity of different yield sections by the number and length of the limit grooves, can realize multi-stage yield energy dissipation, can realize energy dissipation and shock absorption in both small earthquakes and strong earthquakes, and the shock absorption efficiency is significantly improved. It also has a self-resetting function, which can significantly reduce the post-earthquake residual displacement of the shock absorber, prevent the upper electrical equipment from having adverse effects such as cumulative tilt and offset, and can be replaced after the earthquake.

[0018] 2. The novel self-resetting multi-yield shock absorber described in the present invention is small in size and simple in structure, can be processed and assembled in an assembled manner, and is easy to construct.

[0019] 3. Compared with the shock absorbing bolts commonly used in pillar-type electrical equipment, the novel self-resetting multi-yield shock absorber described in the present invention is simple to manufacture, has low production cost, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 It is an exploded view of a novel self-resetting multi-yield shock absorber according to Example 1 of the present invention; Figure 2 It is a top view of a novel self-resetting multi-yield shock absorber according to Example 1 of the present invention; Figure 3 This is an overall diagram of a novel self-resetting multi-yield shock absorber according to Example 1 of the present invention; Figure 4 This is a schematic diagram of the installation position of the new self-resetting multi-yield shock absorber according to Example 1 of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0025] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0026] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0027] Example 1 Embodiment 1 of the present invention provides a novel self-resetting multi-yield shock absorber.

[0028] This embodiment provides a novel self-resetting multi-yield shock absorber for use in ultra-high voltage pillar-type electrical equipment.

[0029] A new type of self-resetting multi-yield shock absorber provided in this embodiment is arranged between the bottom plate of the upper equipment and the top plate of the lower support to solve the engineering problem that traditional shock absorbing devices have large post-earthquake displacement and low shock absorption efficiency under the action of strong earthquakes; at the same time, the new type of self-resetting multi-yield shock absorber provided in this embodiment is simple to manufacture, low in production cost, and has broad application prospects.

[0030] This embodiment provides a novel self-resetting multi-yield shock absorber, such as Figure 1 As shown, it includes: an outer sleeve 7, an energy-absorbing inner core 9, an inner sleeve 8, a self-resetting spring 16, an upper base plate 15, and a lower base plate 14.

[0031] like Figure 2 As shown, the self-resetting spring 16, the inner sleeve 8, the energy-absorbing inner core 9 and the outer sleeve 7 are sequentially sleeved from the inside to the outside.

[0032] The energy-absorbing inner core 9 and the self-resetting spring 16 in the free state are of equal length; the inner sleeve 8 and the outer sleeve 7 are of equal length, and both are shorter than the energy-absorbing inner core 9 by at least the length of a limiting groove 11 .

[0033] Preferably, the length of the energy-consuming inner core satisfies the formula: Lh-Ln=(∑Lxi)-Ls Among them, Lh is the length of the energy-absorbing inner core, Ln is the length of the inner sleeve or the outer sleeve, Lxi is the length of the limit groove opened in the i-th yield section, and Ls is the minimum diameter of the limit bolt.

[0034] In this embodiment, the difference between the length of the energy-absorbing inner core 9 and the length of the inner sleeve 8 or the outer sleeve 7 is equal to the difference between the sum of the lengths of the two limiting grooves 11 and the minimum diameter (the diameter of the detail) of the limiting bolt 10 .

[0035] The bottoms of the inner sleeve 8 and the outer sleeve 7 are connected to the lower base plate 14 by welding.

[0036] The two ends of the energy-absorbing inner core 9 are respectively connected to the upper bottom plate 15 and the lower bottom plate 14 by welding; the two ends of the self-resetting spring 16 are respectively connected to the upper bottom plate 15 and the lower bottom plate 14 by welding.

[0037] In this embodiment, the inner sleeve 8 and the outer sleeve 7 constrain the energy-absorbing inner core 9 to prevent it from buckling and failure during the compression process. The inner sleeve 8 and the outer sleeve 7 are both made of Q345 round tube.

[0038] like Figure 1 As shown, the energy-absorbing inner core 9 is divided into two yield sections: a first yield section 12 and a second yield section 13. Limiting grooves 11 and limiting bolts 10. The lengths of the limiting grooves in the same yield section are equal, the lengths of the limiting grooves in different yield sections are not equal, and the number of limiting grooves in different yield sections is not equal, and the widths of the limiting grooves in different yield sections are equal. Among them, the first yield section 12 includes four limiting grooves 11 of equal length, and the second yield section 13 includes two limiting grooves 11 of equal length. The energy absorption capacity of the two yield sections is jointly controlled by the number and length of the limiting grooves of the two yield sections.

[0039] A limiting bolt 10 is arranged in each limiting groove 11 of the first yielding section 12; and through holes are provided on the inner sleeve 8 and the outer sleeve 7, and the two ends of the limiting bolt 10 pass through the through holes on the inner sleeve 8 and the outer sleeve 7, respectively. The limiting bolt 10 is an I-shaped structure with a thin middle and thick ends, and the through holes on the inner sleeve 8 and the outer sleeve 7 have the same diameter as the thin part of the limiting bolt 10, and the thick part of the limiting bolt 10 is located outside the outer sleeve 7 and inside the inner sleeve 8, respectively.

[0040] In this embodiment, the entire energy dissipation core 9 is made of Q235 low yield point steel pipe; the limit bolts 10 are 4 12.9 grade M20 high-strength bolts.

[0041] The self-resetting spring 16 is located inside the inner sleeve 8 , close to the outer edge of the limiting bolt 10 , and its two ends are respectively welded to the upper base plate 15 and the lower base plate 14 .

[0042] like Figure 4As shown, during use, a new type of self-resetting multi-yield shock absorber 1 provided in this embodiment is arranged between the pillar-type electrical equipment and the pillar connecting member 6, specifically: the upper base plate 15 is fixedly connected to the upper connecting steel plate 4, and the pillar-type electrical equipment 2 is arranged on the upper connecting steel plate 4; the lower base plate 14 is fixedly connected to the lower connecting steel plate 5, and the pillar 3 is arranged under the lower connecting steel plate 5; a plurality of the new type of self-resetting multi-yield shock absorbers 1 provided in this embodiment are arranged between the upper connecting steel plate 4 and the lower connecting steel plate 5.

[0043] When a small earthquake occurs, the first yield section 12 consumes energy first due to the largest number of limit grooves, the smallest cross section, and the strongest energy consumption capacity. At this time, the limit bolt 10 cannot touch the end of the limit groove 11; when a strong earthquake occurs, the first yield section 12 consumes energy first due to the smallest cross section. At this time, the limit bolt 10 slides in the limit groove 11 until it touches the end of the limit groove 11. The first yield section 12 stops working, and the second yield section 13 starts to consume energy. In summary, energy consumption and shock reduction can be achieved in both small and strong earthquakes, and the shock reduction efficiency is significantly improved.

[0044] After the earthquake, the self-resetting spring 16 drives the energy-absorbing inner core 9 to reset under the elastic force. The existence of the self-resetting spring 16 can significantly reduce the residual displacement of the shock absorber after the earthquake, and prevent the upper electrical equipment from having adverse effects such as cumulative tilt and offset.

[0045] Among them, the non-bonding sliding material-polytetrafluoroethylene sheet 17 is filled between the energy-absorbing inner core 9 and the outer sleeve 7, and between the inner sleeve 8 and the energy-absorbing inner core 9, which can reduce the friction resistance between the three and make the energy absorption more sufficient.

[0046] The novel self-resetting multi-yield shock absorber provided in this embodiment has the following advantages: It can realize double-stage yield energy dissipation, and can realize energy dissipation and shock absorption in both small and strong earthquakes, and the shock absorption efficiency is significantly improved. It also has a self-reset function, which can significantly reduce the residual displacement of the shock absorber after the earthquake, and prevent the upper electrical equipment from having adverse effects such as cumulative tilt and offset, and it can be replaced after the earthquake. Small size, simple structure, can be processed and assembled, and easy to construct; Compared with the shock-absorbing bolts commonly used in pillar-type electrical equipment, this shock absorber is simple to manufacture, has low production cost and broad application prospects.

[0047] Example 2 Embodiment 2 of the present invention provides a working method of a novel self-resetting multi-yield shock absorber as in Embodiment 1, comprising the following steps: A new type of self-resetting multi-yield shock absorber 1 in Example 1 is arranged between the pillar-type electrical equipment and the pillar connecting member 6, specifically: the upper base plate 15 is fixedly connected to the upper connecting steel plate 4, and the pillar-type electrical equipment 2 is arranged on the upper part of the upper connecting steel plate 4; the lower base plate 14 is fixedly connected to the lower connecting steel plate 5, and the pillar 3 is arranged under the lower connecting steel plate 5; multiple new type of self-resetting multi-yield shock absorbers 1 in Example 1 are arranged between the upper connecting steel plate 4 and the lower connecting steel plate 5.

[0048] When a small earthquake occurs, the first yield section 12 consumes energy first due to its smallest cross section, and the limit bolt 10 cannot touch the end of the limit slot 11 at this time; when a strong earthquake occurs, the first yield section 12 consumes energy first due to its smallest cross section, and the limit bolt 10 slides in the limit slot 11 until it touches the end of the limit slot 11, and the first yield section 12 stops functioning, and the second yield section 13 starts to consume energy. In summary, energy consumption and shock reduction can be achieved in both small and strong earthquakes, and the shock reduction efficiency is significantly improved.

[0049] After the earthquake, the self-resetting spring 16 drives the energy-absorbing inner core 9 to reset under the action of elastic force. The existence of the self-resetting spring 16 can significantly reduce the post-earthquake residual displacement of the shock absorber and prevent the upper electrical equipment from experiencing adverse effects such as cumulative tilt and offset.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have 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 new type of self-resetting multi-yield shock absorber, characterized in that: It includes an upper bottom plate, a lower bottom plate, and a self-resetting spring, an inner sleeve, an energy-absorbing inner core and an outer sleeve which are sleeved in sequence from the inside to the outside; The energy-absorbing inner core and the self-resetting spring in a free state are of equal length, the lengths of the inner sleeve and the outer sleeve are both shorter than the length of the energy-absorbing inner core, the two ends of the energy-absorbing inner core and the self-resetting spring are respectively fixedly connected to the upper bottom plate and the lower bottom plate, and the bottom ends of the inner sleeve and the outer sleeve are both fixedly connected to the lower bottom plate; The energy-absorbing inner core is divided into a plurality of yield sections, each of which is provided with a plurality of limit grooves of equal length. The number and length of the limit grooves provided in different yield sections are different, and the energy-absorbing capacity of each yield section is jointly controlled by the number and length of the limit grooves.

2. A novel self-resetting multi-yield shock absorber as claimed in claim 1, characterized in that: A limiting bolt is arranged in each limiting groove of the yield section with the strongest energy dissipation capacity.

3. A novel self-resetting multi-yield shock absorber as claimed in claim 2, characterized in that: The limiting bolt is in an I-shaped structure with a thin middle and thick ends. Through holes are provided on the inner sleeve and the outer sleeve, and the two ends of the limiting bolt pass through the through holes on the inner sleeve and the outer sleeve respectively.

4. A novel self-resetting multi-yield shock absorber as claimed in claim 2, characterized in that: The length of the energy-consuming inner core satisfies: Lh-Ln=(∑Lxi)-Ls Among them, Lh is the length of the energy-absorbing inner core, Ln is the length of the inner sleeve or the outer sleeve, Lxi is the length of the limit groove opened in the i-th yield section, and Ls is the minimum diameter of the limit bolt.

5. A novel self-resetting multi-yield shock absorber as claimed in claim 2, characterized in that: The outer edge of the self-resetting spring contacts the end of the limiting bolt.

6. A novel self-resetting multi-yield shock absorber as claimed in claim 1, characterized in that: The energy-absorbing inner core and the outer sleeve, as well as the inner sleeve and the energy-absorbing inner core are filled with a non-adhesive sliding material, a polytetrafluoroethylene sheet.

7. A novel self-resetting multi-yield shock absorber as claimed in claim 1, characterized in that: The energy-absorbing inner core is divided into two yielding sections, the first yielding section comprises four limiting grooves of equal length, and the second yielding section comprises two limiting grooves of equal length.

8. A novel self-resetting multi-yield shock absorber as claimed in claim 1, characterized in that: The inner sleeve and the outer sleeve are both made of Q345 round tubes, and the energy-absorbing inner core is made of Q235 steel tubes.

9. A novel self-resetting multi-yield shock absorber as claimed in claim 1, characterized in that: The inner sleeve and the outer sleeve are equal in length.

10. A method for operating a novel self-resetting multi-yield shock absorber according to any one of claims 1 to 9, characterized in that: include: When an earthquake occurs, each yield section dissipates energy and reduces shock in turn according to the strength of its energy dissipation capacity.

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