WO2020155080A1 - 防爆熔断管及其防爆熔断器和防爆熔断片 - Google Patents

防爆熔断管及其防爆熔断器和防爆熔断片 Download PDF

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Publication number
WO2020155080A1
WO2020155080A1 PCT/CN2019/074352 CN2019074352W WO2020155080A1 WO 2020155080 A1 WO2020155080 A1 WO 2020155080A1 CN 2019074352 W CN2019074352 W CN 2019074352W WO 2020155080 A1 WO2020155080 A1 WO 2020155080A1
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Prior art keywords
fuse
explosion
proof
nut
contact
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PCT/CN2019/074352
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English (en)
French (fr)
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林平
林高山
林威特
林高森
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林平
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Application filed by 林平 filed Critical 林平
Priority to PCT/CN2019/074352 priority Critical patent/WO2020155080A1/zh
Publication of WO2020155080A1 publication Critical patent/WO2020155080A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member

Definitions

  • the invention belongs to the field of power equipment, and particularly relates to an explosion-proof fuse tube, an explosion-proof fuse and an explosion-proof fuse.
  • the fuse tube is a kind of current protector. When the current exceeds the specified value, the fuse is blown by the heat generated by itself, thereby breaking the circuit.
  • Fuse tubes are widely used in high and low voltage power distribution systems and control systems, as well as electrical equipment, as short-circuit and over-current protectors.
  • the existing fuse tube is mainly composed of ordinary fuse links or fuse links. When the machine is started, the current overload or high-intensity fatigue vibration causes the fasteners to loosen and the resistance increases. At this time, the fuse link and the fuse connection column plate Overheating of the contact point causes the fuse link to deform after being heated and expand, and the deformed fuse link expands and spreads outward.
  • the fuse link shrinks and becomes thinner, resulting in a gap between the fuse link and the fuse connection column plate, and the fasteners become loose.
  • the resistance continues to increase, the high temperature generated by overheating will cause the fuse link and the fuse
  • the contact point position of the post plate melts and breaks. Therefore, the fuse tube needs to be replaced frequently, the labor intensity of workers is high, and the use cost is high.
  • the fuse link and the oxide layer on the fuse connection pillar will form a diaphragm.
  • the existence of the diaphragm will increase the resistance and the current will easily be overloaded.
  • the fuse link will expand and contract. The gap makes it easier for the resistance to rise, which leads to the melting of the fuse column plate and a shorter service life.
  • the purpose of the present invention is to overcome the above-mentioned drawbacks and provide an explosion-proof fuse tube, an explosion-proof fuse and an explosion-proof fuse link, which provide a deformation space for the fuse link by adding recessed grooves on the fuse link and the fuse column plate, and at the same time increase
  • the contact area between the deformed fuse link and the fuse connection column plate avoids frequent current overload, high frequency thermal expansion and contraction of the fuse link, resulting in a gap between the fuse link thinning and the fuse connection column plate, resulting in frequent melting of the fuse link Open question.
  • the explosion-proof fuse link includes a middle sheet body, the two sides of the middle sheet body are respectively provided with contact sheets, and the contact sheet body is provided with a recessed groove A.
  • the contact sheet has a structure with a thickness in the middle and gradually thinner around the periphery, and a through hole is provided on the contact sheet.
  • the contact sheet body is wrapped with copper skin or copper wire cloth, and the copper skin or copper wire cloth is provided with a concave groove B that matches with the concave groove A.
  • the middle sheet body is a metal flake or a laser line.
  • the explosion-proof fuse includes a fuse-link, the fuse-link includes a middle piece body, the two sides of the middle piece body are respectively provided with a contact piece body, the contact piece body is connected with the fuse column plate through a fastener, and the contact piece body is With recessed groove A.
  • the contact piece body has a structure in which the thickness of the middle part is gradually thinner around the circumference, the contact piece body is provided with a through hole, the fusing column plate is provided with an annular groove matching the contact piece body, and the annular groove is provided with a concave groove C.
  • a transition groove is provided between the annular groove and the bottom of the fuse column plate.
  • a disc spring washer is provided between the contact sheet body and the fastener, and a concave groove D is provided on the contact surface of the disc spring washer and the contact sheet body.
  • the fastener includes a flange bolt and a flange nut.
  • the flange surfaces of the flange bolt and the flange nut have an arc-shaped structure, and the center of the arc-shaped structure is respectively arranged on the side of the contact sheet.
  • a recessed groove E is provided on the shape structure.
  • the explosion-proof fuse tube includes an explosion-proof sleeve, and the upper and lower ends of the explosion-proof sleeve are respectively provided with a cover, and the feature is that the explosion-proof fuse according to claim 9 is arranged in the explosion-proof sleeve, and the fuse connection column plate passes through The mounting gasket is fixed to the cover.
  • a concave groove A is added to the contact piece body of the explosion-proof fuse link, and a concave groove B is added to the fusible link column plate.
  • the fuse link is heated and deformed, it is prevented from expanding and cooling down; the concave groove A and the concave groove B are in the fuse link Deformation space is provided during expansion.
  • the deformed body of the fuse link fills the recessed groove A and the recessed groove B, which increases the contact surface between the fuse link and the fuse column plate after deformation. After the fuse link cools, it avoids explosion-proof fuse links and fuse connections There is a gap between the column plates, which improves the service life of the explosion-proof fuse link;
  • An annular groove and a transition groove are added to the fuse connection column plate.
  • the contact piece of the explosion-proof fuse link adopts a structure with a middle thickness and a gradually thinning around the circumference, which further prevents the explosion-proof fuse link from being heated and thinned, and the annular groove and the transition groove make the explosion-proof fuse
  • the deformed body moves along the annular groove and the transition groove to avoid local thinning of the explosion-proof fuse sheet and melting and fracture;
  • the fastener adopts flange bolts and flange nuts with arc-shaped structure and recessed groove E, which have rebound characteristics and can prevent high-strength fatigue vibration and inertia loosening after thermal expansion and contraction of explosion-proof fuse links;
  • Disc spring washers also have rebound characteristics, which can prevent high-strength fatigue vibration and inertia loosening after thermal expansion and contraction of explosion-proof fuse links.
  • Figure 1 is the front view of the fuse link
  • Figure 2 is a top view of the fuse link
  • Figure 3 shows a fuse sheet wrapped with copper sheet or copper wire cloth
  • Figure 4 is a fuse sheet wrapped with copper sheet or copper wire cloth, and the middle sheet body is a laser line;
  • Figure 5 is a schematic diagram of the structure of an explosion-proof fuse
  • Figure 6 is a front view of the fuse column plate
  • Figure 7 is a schematic diagram of the structure of the fuse column plate
  • Figure 8 is a front view of the disc spring washer
  • Figure 9 is a left side view of the disc spring washer
  • Figure 10 is a front view of flange bolts
  • Figure 11 is the right view of the flange bolt
  • Figure 12 is the front view of the flange nut
  • Figure 13 is the right view of the flange nut
  • Figure 14 is a schematic diagram of the structure of the fastener in the fifth embodiment
  • 15 is a schematic diagram of the structure of the anti-loosening nut in the fifth embodiment.
  • 16 is a schematic diagram of the structure of the groove and expansion groove of the screw in the fifth embodiment
  • Figure 17 is a schematic view of the structure of the fastener in the sixth embodiment.
  • FIG. 18 is a schematic diagram of the structure of the anti-loosening nut in the sixth embodiment.
  • 19 is a schematic diagram of the structure of the first nut in the sixth embodiment.
  • Figure 20 is a schematic structural diagram of an explosion-proof fuse.
  • Embodiment 1 As shown in FIG. 1, the explosion-proof fuse link includes a middle piece body 11, two sides of the middle piece body 11 are respectively provided with contact pieces 12, and a recessed groove A13 is provided on the contact piece body 12.
  • the contact sheet 12 has a structure with a thickness in the middle and gradually thinner around the periphery, and a through hole 14 is provided on the contact sheet 12.
  • the contact sheet body 12 is wrapped with copper skin or copper wire cloth, and the copper skin or copper wire cloth is provided with a concave groove B15 that matches with the concave groove A13.
  • the middle sheet 11 is a metal foil or a laser line.
  • Embodiment 2 As shown in Figures 5 and 1, the explosion-proof fuse includes a fuse-link 1, which includes a middle piece 11, and two contact pieces 12 are provided on both sides of the middle piece 11, and the contact pieces 12 pass tightly.
  • the firmware is connected to the fuse column plate 2, and the contact sheet body 12 is provided with a recessed groove A13.
  • the contact sheet body 12 has a structure with a thickness in the middle and gradually thinner around the periphery.
  • the contact sheet body 12 is provided with through holes 14.
  • the fuse connection pillar plate 2 is provided with The contact plate 21 is provided with an annular groove 23 matched with the contact sheet body 12, a recessed groove C22 is provided in the annular groove 23, and a transition groove 24 is provided between the annular groove 23 and the bottom of the fuse connection column plate 2.
  • one or both sides of the fusible connection column plate 2 are installed with the fusible link 1 through fasteners.
  • the contact sheet body 12 closely fits the annular groove 23.
  • the instantaneous current overload When the resistance increases, the fuse link 1 will be deformed due to thermal expansion.
  • the deformed body of the fuse link 1 will enter the recessed groove A13, the recessed groove C22 and the annular groove 23, and will not spread out and overflow, avoiding the overflow of the deformed body and causing fusing.
  • Embodiment 3 As shown in Figures 8 and 9, a disc spring washer 5 is provided between the contact sheet body 12 and the fastener. As shown in Fig. 8, the contact surface of the disc spring washer 5 and the contact sheet body 12 A concave groove D51 is provided on the upper part; the others are the same as in the second embodiment.
  • the disc spring washer 5 has spring-back characteristics and can absorb high-strength fatigue vibration. At the same time, after the fuse link 1 expands and contracts with heat, it can rebound to avoid inertial looseness of the fastener.
  • the recessed groove D51 also provides deformation space for the fuse link 1 to prevent it from becoming thin after thermal expansion and contraction.
  • Embodiment 4 The fastener is a bolt and nut assembly; the others are the same as in the third embodiment.
  • the fastener includes a screw 33, one end of the screw 33 is provided with a bolt head, and the bolt head is provided with an anti-loosening flange, and the anti-loosening flange is integrated with the bolt head
  • the other end of the screw 33 is provided with a groove 34 and an expansion slot 36.
  • the screw 33 is provided with an anti-loosening nut.
  • the anti-loosening nut includes a normal nut 42 and a flange nut A41.
  • the end surface of the flange nut A41 is provided with a slope
  • the angle between the surface 44 and the inclined surface 44 and the end surface of the ordinary nut 42 when mated is greater than 0° and less than or equal to 6°, and a screw 35 is provided in the groove 34; other things are the same as in the third embodiment.
  • the screw 33 passes through the fuse link 1 and the fuse column plate 2, and then the flange nut A41 is screwed into the screw 33, and then the ordinary nut 42 is screwed into the screw 33, as shown in Figure 15, the ordinary nut 42 and When the flange nut A41 is in contact, due to the action of the inclined surface 44, the ordinary nut 42 and the end face of the flange nut A41 will not fit closely, but there is only one contact point 43 in contact.
  • the flange nut A41 Since the forces are mutual, at the contact point 43, the flange nut A41 generates an upward force F2 on the ordinary nut 42, causing the right side of the ordinary nut 42 to generate a leftward rotating moment A2, forcing the ordinary nut 42 to have a direction There is a tendency to rotate to the left, but due to the presence of the screw 33, the ordinary nut 42 will not turn to the left, but will squeeze the screw 33. Therefore, the right thread of the ordinary nut 42 generates a force F4 to the screw 33, so that The right side thread closely fits the screw 33, while the left side thread and the screw 33 have a certain gap.
  • Embodiment 6 As shown in Figures 17 to 19, the screw 33 is provided with an anti-loosening nut.
  • the anti-loosening nut includes a first nut 47 and a second nut 45.
  • the first nut 47 is provided with a boss 48 ,
  • the boss 48 is an eccentric boss, and the boss 48 is provided with a shrinking groove 49;
  • the second nut 45 is provided with a second groove 46 that cooperates with the boss 48 on the first nut 47; boss
  • boss The height of 48 is h, and the value range of h is greater than 0.4 times the diameter of the internal thread of the first nut 47, and less than or equal to 3 times the diameter of the internal thread of the first nut; the others are the same as the fifth embodiment. If h is too large or too small, the first nut 47 and the second nut 45 cannot be prevented from loosening and falling off.
  • the screw 33 passes through the fuse link 1 and the fuse column plate 2, and then the first nut 47 is screwed into the screw 33, and then the second nut 45 is screwed into the screw 33, and the first nut 47
  • the upper boss 48 is screwed into the second groove 46 on the second nut 45.
  • the boss 48 on the first nut 47 is manufactured by eccentric processing, and the second nut 45 is processed with a normal center circle.
  • the first nut 47 and the second nut 45 are screwed together, it is like inserting a wedge into the nut. So as to achieve the effect of preventing loosening.
  • the boss 48 on the first nut 47 is an eccentric boss, there will be a gap between the boss 48 and the second groove 46 when tightening, but under the action of the tightening groove 49, the first nut
  • the internal thread on 47 will shrink inward and "hold tight” the screw 33.
  • the rigid and flexible threads increase friction and achieve the effect of resisting high-strength fatigue vibration without loosening.
  • the screw 35 can be optionally installed in the groove 34 on the screw 33.
  • Embodiment 7 As shown in Figures 10 to 13, the fastener includes a flange bolt 3 and a flange nut 4.
  • the flange surfaces of the flange bolt 3 and the flange nut 4 are respectively an arc-shaped structure 31.
  • the centers of the shaped structures 31 are respectively arranged on one side of the contact sheet 12, and the arc-shaped structure 31 is provided with a recessed groove E32; the others are the same as in the second embodiment.
  • the flange bolt 3 passes through the fuse link 1 and the fuse column plate 2, and then the flange nut 4 is screwed into the flange bolt 3, because the flange of the flange bolt 3 and the flange nut 4
  • the surfaces are respectively arc-shaped structures 31.
  • the arc-shaped structures 31 and the fuse link 1 are closely attached.
  • the arc structure 31 can rebound to avoid the inertial looseness of the fastener.
  • the recessed groove E32 can also provide deformation space for the fuse link 1 to prevent it from becoming thin after thermal expansion and contraction.
  • the explosion-proof fuse tube includes an explosion-proof sleeve 63.
  • the upper and lower ends of the explosion-proof sleeve 63 are respectively provided with a cover 61, and the explosion-proof sleeve 63 is provided with the second embodiment to the seventh embodiment.
  • the fusible connection column plate 2 is fixed to the cover 61 through a mounting gasket 62.
  • the installation gasket 62, the explosion-proof casing 63 and the cover 61 are all the prior art.
  • the installation gasket 62 is provided with a slot. During installation, the slots on the two installation gaskets 62 are arranged opposite to each other. The fuse post plate 2 is stuck.

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Abstract

一种防爆熔断管及其防爆熔断器和防爆熔断片，属于电力设备领域，主要用于电机及空气压缩机等电力设备。主要包括熔断片（1），熔断片（1）包括中部片体（11），中部片体（11）两侧分别设有接触片体（12），接触片体（12）通过紧固件与熔断接柱板（2）连接，所述接触片体（12）上设有凹陷槽A（13）；接触片体（12）为中间厚四周逐渐变薄的结构，接触片体（12）上设有通孔（14），熔断接柱板（2）上设有与接触片体（12）配合的环形槽（23），环形槽（23）内设有凹陷槽C（22）。通过在熔断片（1）和熔断接柱板（2）上增设凹陷槽，为熔断片（1）提供变形空间，同时增加了变形后的熔断片（1）与熔断接柱板（2）的接触面积，避免了由于电流频繁过载，熔断片（1）高频率热胀冷缩，使熔断片（1）变薄与熔断接柱板（2）之间产生间隙，导致熔断片（1）频繁熔融断开的问题。

Description

防爆熔断管及其防爆熔断器和防爆熔断片 技术领域
本发明属于电力设备领域，具体地说，尤其涉及一种防爆熔断管及其防爆熔断器和防爆熔断片。
背景技术
熔断管是一种电流保护器，其在电流超过规定值时，以本身产生的热量使熔体熔断，从而断开电路。熔断管广泛应用于高低压配电系统和控制系统以及用电设备中，作为短路和过电流的保护器。现有的熔断管内主要是普通型的熔断片或熔断丝，在机器启动瞬间电流过载或高强度疲劳震动时，导致紧固件松动，电阻增大，此时，熔断片与熔断接柱板的接触点过热，使熔断片受热膨胀后发生变形，变形的熔断片膨胀向外扩散溢出。待电流平稳后，熔断片冷却收缩变薄，导致熔断片与熔断接柱板之间产生间隙，紧固件相对应变得松动，当电阻继续增大时，过热产生的高温会使熔断片与熔断接柱板的接触点位置熔融断开。因此，需要频繁更换熔断管，工人劳动强度大，使用成本高。
其次，由于金属表面易产生氧化层，熔断片与熔断接柱板上的氧化层叠加会形成隔膜，隔膜的存在将使电阻增大，电流容易过载，再加上熔断片热胀冷缩后产生间隙，使电阻更易升高，导致熔断接柱板熔融，使用寿命较短。
发明内容
本发明的目的在于克服上述缺陷，提供一种防爆熔断管及其防爆熔断器和防爆熔断片，其通过在熔断片和熔断接柱板上增设凹陷槽，为熔断片提供变形空间，同时增加了变形后的熔断片与熔断接柱板的接触面积，避免了电流频繁过载，熔断片高频率热胀冷缩，使熔断片变薄与熔断接柱板之间产生间隙，导致熔断片频繁熔融断开的问题。
所述的防爆熔断片，包括中部片体，中部片体两侧分别设有接触片体，所述接触片体上设有凹陷槽A。
进一步地，所述接触片体为中间厚四周逐渐变薄的结构，接触片体上设有通孔。
进一步地，所述接触片体上包裹有铜皮或铜丝布，铜皮或铜丝布上设有与凹陷槽A配合的凹陷槽B。
进一步地，所述中部片体为金属薄片或激光线。
所述的防爆熔断器，包括熔断片，熔断片包括中部片体，中部片体两侧分别设有接触片 体，接触片体通过紧固件与熔断接柱板连接，所述接触片体上设有凹陷槽A。
进一步地，所述接触片体为中间厚四周逐渐变薄的结构，接触片体上设有通孔，熔断接柱板上设有与接触片体配合的环形槽，环形槽内设有凹陷槽C。
进一步地，所述环形槽与熔断接柱板底部之间设有过渡槽。
进一步地，所述接触片体与紧固件之间设有碟形弹簧垫圈，碟形弹簧垫圈与接触片体的接触面上设有凹陷槽D。
进一步地，所述紧固件包括法兰螺栓和法兰螺母，法兰螺栓和法兰螺母的法兰面分别为弧形结构，弧形结构的圆心分别设置于接触片体的一侧，弧形结构上设有凹陷槽E。
所述的防爆熔断管，包括防爆套管，防爆套管上下两端分别设有盖体，其特征在于：所述防爆套管内设有权利要求9所述的防爆熔断器，熔断接柱板通过安装垫片与盖体固定。
与现有技术相比，本发明的有益效果是：
1、防爆熔断片的接触片体上增设凹陷槽A、熔断接柱板上增设凹陷槽B，在熔断片受热变形时，避免其膨胀后冷却变薄；凹陷槽A和凹陷槽B在熔断片膨胀时提供变形空间，熔断片的变形体填满凹陷槽A和凹陷槽B，增大了变形后熔断片与熔断接柱板的接触面，熔断片冷却后，从而避免防爆熔断片和熔断接柱板之间产生间隙，提高了防爆熔断片的使用寿命；
2、熔断接柱板上增设环形槽和过渡槽，防爆熔断片的接触片体采用中间厚四周逐渐变薄的结构，进一步避免了防爆熔断片受热变薄，同时环形槽和过渡槽使防爆熔断片变形时，变形体沿环形槽和过渡槽移动，避免防爆熔断片局部变薄，熔融断裂；
3、紧固件采用带弧形结构和凹陷槽E的法兰螺栓和法兰螺母，其具有回弹特性，能防止高强度的疲劳震动，及防爆熔断片热胀冷缩后的惯性松动；
4、碟形弹簧垫圈同样具有回弹特性，能防止高强度的疲劳震动，及防爆熔断片热胀冷缩后的惯性松动。
附图说明
图1为熔断片的主视图；
图2为熔断片的俯视图；
图3为包裹铜皮或铜丝布的熔断片；
图4为包裹铜皮或铜丝布、中部片体为激光线的熔断片；
图5为防爆熔断器的结构示意图；
图6为熔断接柱板的主视图；
图7为熔断接柱板的结构示意图；
图8为碟形弹簧垫圈的主视图；
图9为碟形弹簧垫圈的左视图；
图10为法兰螺栓的主视图；
图11为法兰螺栓的右视图；
图12为法兰螺母的主视图；
图13为法兰螺母的右视图；
图14为实施例五中紧固件的结构示意图；
图15为实施例五中防松脱螺母的结构示意图；
图16为实施例五中螺杆的凹槽及膨胀切槽的结构示意图；
图17为实施例六中紧固件的结构示意图；
图18为实施例六中防松脱螺母的结构示意图；
图19为实施例六中第一螺母的结构示意图；
图20为防爆熔断管的结构示意图。
图中，1、熔断片；2、熔断接柱板；3、法兰螺栓；4、法兰螺母；5、碟形弹簧垫圈；11、中部片体；12、接触片体；13、凹陷槽A；14、通孔；15、凹陷槽B；21、接触板；22、凹陷槽C；23、环形槽；24、过渡槽；31、弧形结构；32、凹陷槽E；33、螺杆；34、凹槽；35、螺钉；36、膨胀切槽；41、法兰螺母A；42、普通螺母；43、接触点；44、倾斜面；45、第二螺母；46、第二凹槽；47、第一螺母；48、凸台；49、缩紧切槽；51、凹陷槽D；61、盖体；62、安装垫片；63、防爆套管。
具体实施方式
下面结合附图对本发明作进一步说明：
实施例一：如图1所示，防爆熔断片包括中部片体11，中部片体11两侧分别设有接触片体12，所述接触片体12上设有凹陷槽A13。
如图2所示，所述接触片体12为中间厚四周逐渐变薄的结构，接触片体12上设有通孔14。
如图3所示，所述接触片体12上包裹有铜皮或铜丝布，铜皮或铜丝布上设有与凹陷槽A13配合的凹陷槽B15。
如图4所示，所述中部片体11为金属薄片或激光线。
实施例二：如图5和图1所示，防爆熔断器包括熔断片1，熔断片1包括中部片体11，中部片体11两侧分别设有接触片体12，接触片体12通过紧固件与熔断接柱板2连接，所述接触片体12上设有凹陷槽A13。
如图2所示，所述接触片体12为中间厚四周逐渐变薄的结构，接触片体12上设有通孔14，如图6和图7所示，熔断接柱板2上设有接触板21，接触板21上设有与接触片体12配合的环形槽23，环形槽23内设有凹陷槽C22，环形槽23与熔断接柱板2底部之间设有过渡槽24。
本实施例在安装时，熔断接柱板2的一侧或两侧通过紧固件安装熔断片1，通过紧固，接触片体12与环形槽23紧密贴合，使用时，当瞬时电流过载时，电阻增大，导致熔断片1受热膨胀发生变形，熔断片1的变形体将进入凹陷槽A13、凹陷槽C22和环形槽23内，不会向外扩散溢出，避免了变形体溢出导致熔断片1变薄的问题；当电流平稳，熔断片1降温后冷却，熔断片1的变形体增大了与熔断接柱板2的接触面积，避免现有技术中熔断片1热胀冷缩后与熔断接柱板2之间产生间隙，导致熔断片1熔融断裂的现象。
实施例三：如图8和图9所示，接触片体12与紧固件之间设有碟形弹簧垫圈5，如图8所示，碟形弹簧垫圈5与接触片体12的接触面上设有凹陷槽D51；其它与实施二相同。
碟形弹簧垫圈5具有回弹特性，能对高强度疲劳震动进行减震，同时，在熔断片1热胀冷缩后，能进行回弹，避免紧固件的惯性松动。凹陷槽D51也为熔断片1提供变形空间，防止其热胀冷缩后变薄。
实施例四：所述紧固件为螺栓和螺母组件；其它与实施三相同。
实施例五：如图14至图16所示，所述紧固件包括螺杆33，螺杆33一端设有螺栓头，螺栓头处设有防松脱法兰，所述防松脱法兰与螺栓头一体成型，螺杆33另一端设有凹槽34和膨胀切槽36，螺杆33上设有防松脱螺母，防松脱螺母包括普通螺母42和法兰螺母A41，法兰螺母A41的端面设有倾斜面44，倾斜面44在配合时与普通螺母42的端面之间的角度大于0°，小于等于6°，凹槽34内设有螺钉35；其它与实施三相同。
使用时，螺杆33穿过熔断片1和熔断接柱板2，然后将法兰螺母A41旋入螺杆33上，再将普通螺母42旋入螺杆33上，如图15所示，普通螺母42与法兰螺母A41接触时，由于倾斜面44的作用，普通螺母42与法兰螺母A41的端面并不会紧密贴合，而是只有一个接触点43接触，在给普通螺母42施加力的作用下，法兰螺母A41的接触点43处会产生一个向下的力F1，使法兰螺母A41的左侧产生向右旋转的力矩A1，迫使法兰螺母A41有向右旋转的倾 向，但由于螺杆33的存在，法兰螺母A41不会向右侧翻转，但会对螺杆33挤压施力，因此法兰螺母A41的左侧螺纹处向螺杆33产生一个力F3，使左侧螺纹与螺杆33紧密贴合不松动，即使在发生震动的情况下，也不会松脱。
由于力的作用是相互的，在接触点43处，法兰螺母A41对普通螺母42产生一个向上的力F2，使普通螺母42的右侧产生向左旋转的力矩A2，迫使普通螺母42有向左旋转的倾向，但由于螺杆33的存在，普通螺母42不会向左侧翻转，但会对螺杆33挤压施力，因此普通螺母42的右侧螺纹处向螺杆33产生一个力F4，使右侧螺纹与螺杆33紧密贴合，而左侧螺纹与螺杆33则有一定的空隙，将螺钉35拧入凹槽34内时，在膨胀切槽36的作用下螺杆33的端部会有些许膨胀，而膨胀后的地方正好填补了左侧螺纹与螺杆33的空隙处，因此位于螺杆33上的普通螺母42即使在松动的情况下也不会退出螺杆33，即使在发生高强度疲劳震动的情况下，也不会松脱。
实施例六：如图17至图19所示，螺杆33上设有防松脱螺母，防松脱螺母包括第一螺母47和第二螺母45，所述第一螺母47上设有凸台48，凸台48为偏心凸台，凸台48上设有缩紧切槽49；第二螺母45上设有和第一螺母47上的凸台48相互配合安装的第二凹槽46；凸台48的高度为h，h的取值范围大于第一螺母47的内螺纹直径的0.4倍，小于等于第一螺母的内螺纹直径的3倍；其它与实施例五相同。若h太大或太小都对第一螺母47和第二螺母45无法起到防松与防脱的目的。
本实施例在使用时，螺杆33穿过熔断片1和熔断接柱板2，然后将第一螺母47旋入螺杆33上，再将第二螺母45旋入螺杆33上，而第一螺母47上的凸台48旋入第二螺母45上的第二凹槽46内即可。第一螺母47上的凸台48制造时采用偏心加工，第二螺母45则是正常的中心圆形加工，当第一螺母47和第二螺母45拧在一起，就像螺母中插入楔子一样，从而实现了防松动的效果。
由于第一螺母47上的凸台48为偏心凸台，拧紧时凸台48与第二凹槽46之间一侧会留有一处缝隙，但在缩紧切槽49的作用下，第一螺母47上的内螺纹会向内收缩而“抱紧”螺杆33，刚柔相济的螺纹增加摩擦力，达到抗高强度疲劳震动而不松动的效果。螺杆33上的凹槽34内可选择性的安装螺钉35。
实施例七：如图10至图13所示，所述紧固件包括法兰螺栓3和法兰螺母4，法兰螺栓3和法兰螺母4的法兰面分别为弧形结构31，弧形结构31的圆心分别设置于接触片体12的一侧，弧形结构31上设有凹陷槽E32；其它与实施二相同。
本实施例在使用时，法兰螺栓3穿过熔断片1和熔断接柱板2，然后将法兰螺母4旋入 法兰螺栓3上，由于法兰螺栓3和法兰螺母4的法兰面分别为弧形结构31，旋紧时，弧形结构31与熔断片1贴合紧密。在高强度疲劳震动进行减震，或者，熔断片1热胀冷缩后，弧形结构31能进行回弹，避免紧固件的惯性松动。凹陷槽E32也能为熔断片1提供变形空间，防止其热胀冷缩后变薄。
实施例八：如图20所示，防爆熔断管，包括防爆套管63，防爆套管63上下两端分别设有盖体61，所述防爆套管63内设有实施例二至实施例七中任一种防爆熔断器，熔断接柱板2通过安装垫片62与盖体61固定。
安装垫片62、防爆套管63和盖体61均为现有技术，安装垫片62上设有卡槽，安装时，两个安装垫片62上的卡槽相对布置，将防爆熔断器的熔断接柱板2卡住。

Claims (13)

  1. 一种防爆熔断片，包括中部片体(11)，中部片体(11)两侧分别设有接触片体(12)，其特征在于：所述接触片体(12)上设有凹陷槽A(13)。
  2. 根据权利要求1所述的防爆熔断片，其特征在于：所述接触片体(12)为中间厚四周逐渐变薄的结构，接触片体(12)上设有通孔(14)。
  3. 根据权利要求1所述的防爆熔断片，其特征在于：所述接触片体(12)上包裹有铜皮或铜丝布，铜皮或铜丝布上设有与凹陷槽A(13)配合的凹陷槽B(15)。
  4. 根据权利要求1至3中任一项所述的防爆熔断片，其特征在于：所述中部片体(11)为金属薄片或激光线。
  5. 一种防爆熔断器，包括熔断片(1)，熔断片(1)包括中部片体(11)，中部片体(11)两侧分别设有接触片体(12)，接触片体(12)通过紧固件与熔断接柱板(2)连接，其特征在于：所述接触片体(12)上设有凹陷槽A(13)。
  6. 根据权利要求5所述的防爆熔断器，其特征在于：所述接触片体(12)为中间厚四周逐渐变薄的结构，接触片体(12)上设有通孔(14)，熔断接柱板(2)上设有与接触片体(12)配合的环形槽(23)，环形槽(23)内设有凹陷槽C(22)。
  7. 根据权利要求6所述的防爆熔断器，其特征在于：所述环形槽(23)与熔断接柱板(2)底部之间设有过渡槽(24)。
  8. 根据权利要求7所述的防爆熔断器，其特征在于：所述接触片体(12)与紧固件之间设有碟形弹簧垫圈(5)，碟形弹簧垫圈(5)与接触片体(12)的接触面上设有凹陷槽D(51)。
  9. 根据权利要求8所述的防爆熔断器，其特征在于：所述紧固件包括螺杆(33)，螺杆(33)一端设有螺栓头，螺栓头处设有防松脱法兰，所述防松脱法兰与螺栓头一体成型，螺杆(33)另一端设有凹槽(34)和膨胀切槽(36)，凹槽(34)内设有螺钉(35)，螺杆(33)上设有防松脱螺母。
  10. 根据权利要求9所述的防爆熔断器，其特征在于：所述防松脱螺母包括普通螺母(42)和法兰螺母A(41)，法兰螺母A(41)的端面设有倾斜面(44)，倾斜面(44)与普通螺母(42)的端面之间的角度大于0°，小于等于6°。
  11. 根据权利要求9所述的防爆熔断器，其特征在于：所述防松脱螺母包括第一螺母(47)和第二螺母(45)，所述第一螺母(47)上设有凸台(48)，凸台(48)为偏心凸台，凸台(48)上设有缩紧切槽(49)；第二螺母(45)上设有和第一螺母(47)上的凸台(48)相互配合安装的第二凹槽(46)；凸台(48)的高度为h，h的取值范围大于第一螺母(47)的内螺纹直 径的0.4倍，小于等于第一螺母(47)的内螺纹直径的3倍。
  12. 根据权利要求5至8中任一项所述的防爆熔断器，其特征在于：所述紧固件包括法兰螺栓(3)和法兰螺母(4)，法兰螺栓(3)和法兰螺母(4)的法兰面分别为弧形结构(31)，弧形结构(31)的圆心分别设置于接触片体(12)的一侧，弧形结构(31)上设有凹陷槽E(32)。
  13. 一种防爆熔断管，包括防爆套管(63)，防爆套管(63)上下两端分别设有盖体(61)，其特征在于：所述防爆套管(63)内设有权利要求12所述的防爆熔断器，熔断接柱板(2)通过安装垫片(62)与盖体(61)固定。
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