阅读说明：本技术 一种封闭型喷射式熔断器 (Closed type jet fuse ) 是由 王建光 李响 于 2021-05-19 设计创作，主要内容包括：本发明提供了一种封闭型喷射式熔断器,包括：绝缘套管以及套装在绝缘套管内部的产气筒；产气筒的一端可拆卸的固定连接有动弧触头,产气筒的内部滑动设置有与动弧触头相配合的滑动触头；产气筒远离动弧触头的一端对接有绝缘管,且绝缘管的端部设置有用于抵压滑动触头的弹簧；绝缘管的外部套装有中间触头,中间触头与滑动触头之间连接有熔断机构。本发明中,采用全绝缘设计,带电部位不暴露在外,提高了产品的安全性以及使用寿命；且该熔断器内部装配简单、通流能力强大、止位精确,具有一定的实用推广价值。(The present invention provides a closed type expulsion fuse comprising: the gas generating device comprises an insulating sleeve and a gas generating cylinder sleeved in the insulating sleeve; one end of the gas generating cylinder is detachably and fixedly connected with a moving arc contact, and a sliding contact matched with the moving arc contact is arranged in the gas generating cylinder in a sliding manner; one end of the gas generating cylinder, which is far away from the moving arc contact, is butted with an insulating tube, and the end part of the insulating tube is provided with a spring for abutting against the sliding contact; the outside cover of insulating tube is equipped with middle contact, is connected with fusing mechanism between middle contact and the sliding contact. In the invention, the full-insulation design is adopted, and the electrified part is not exposed outside, thereby improving the safety of the product and prolonging the service life; the fuse is simple in internal assembly, high in through-current capacity and accurate in stopping position, and has certain practical popularization value.)

1. A closed type expulsion fuse, comprising: the gas generating device comprises an insulating sleeve and a gas generating cylinder sleeved in the insulating sleeve; wherein the content of the first and second substances,

one end of the gas generating cylinder is detachably and fixedly connected with a movable arc contact, and a sliding contact matched with the movable arc contact is arranged in the gas generating cylinder in a sliding manner; one end of the gas generating cylinder, which is far away from the moving arc contact, is butted with an insulating tube, and the end part of the insulating tube is provided with a spring for abutting against the sliding contact; an intermediate contact is sleeved outside the insulating tube, and a fusing mechanism is connected between the intermediate contact and the sliding contact.

2. An enclosed ejector fuse according to claim 1, wherein an upper cable connector is provided at one end of the insulating sleeve, and a lower cable connector is connected to an end of the insulating sleeve remote from the upper cable connector.

3. An enclosed ejector fuse according to claim 2, wherein a beryllium bronze spring is provided between the moving arc contact and the upper cable connector.

4. An enclosed jetfuse as in claim 2, wherein the intermediate contact is electrically connected to the lower cable connector.

5. An enclosed ejector fuse according to any of claims 1 to 4, wherein the inner layer of the insulating sleeve is an epoxy resin die cast inner housing and the outer layer of the insulating sleeve is a silicone rubber cast outer housing.

6. A closed type expulsion fuse as claimed in any one of claims 1 to 4, characterized in that said fusing mechanism is detachably fixedly connected to said intermediate contact by means of a compression nut.

7. An enclosed ejector fuse in accordance with claim 6 wherein said fusing mechanism comprises: a fuse wire connected to the sliding contact and a soft copper cord connected to the fuse wire; and one end of the soft rope pulling rope, which is far away from the fuse wire, is pressed by the compression nut.

8. An enclosed ejector fuse according to claim 1, wherein the insulating sleeve is provided at an inner portion thereof with a mounting space for mounting a lightning arrester.

9. An enclosed ejector fuse according to claim 8, wherein the moving arcing contacts and the intermediate contacts are each equipped with a sensor for detecting the current capacity of the contacts.

10. An enclosed ejector fuse as in claim 9, wherein an end of the insulative sleeve remote from the moving arc contact is provided with a signal conversion transmitter in signal communication with the sensor.

Technical Field

The invention relates to the technical field of fuses, in particular to a closed type jet fuse.

Background

The fuse is an electric appliance which fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value. The fuse melts the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so as to cut off the circuit; a current protector is made by applying the principle. The fuse is widely applied to high and low voltage distribution systems, control systems and electric equipment, and is one of the most commonly applied protection devices as a short circuit and overcurrent protector.

However, the existing closed fuse mostly adopts a porcelain shell, and fragments can be splashed when the pressure is extremely strong;

and the internal assembly structure is complex, the same flow capacity is small, and the stop position is not accurate. And current fuse and arrester are mostly the components of a whole that can function independently setting to can't carry out on-line measuring to the component in the product, the practicality is lower.

Disclosure of Invention

In view of the above, the invention provides a closed type jet fuse which adopts a full insulation design, does not expose charged parts, improves the safety of products, and has the advantages of simple assembly, strong current capacity and accurate stopping position.

The present invention provides a closed type expulsion fuse comprising: the gas generating device comprises an insulating sleeve and a gas generating cylinder sleeved in the insulating sleeve; wherein the content of the first and second substances,

one end of the gas generating cylinder is detachably and fixedly connected with a movable arc contact, and a sliding contact matched with the movable arc contact is arranged in the gas generating cylinder in a sliding manner; one end of the gas generating cylinder, which is far away from the moving arc contact, is butted with an insulating tube, and the end part of the insulating tube is provided with a spring for abutting against the sliding contact; an intermediate contact is sleeved outside the insulating tube, and a fusing mechanism is connected between the intermediate contact and the sliding contact.

Preferably, an upper cable connector is arranged at one end of the insulating sleeve, and a lower cable connector is connected to one end of the insulating sleeve, which is far away from the upper cable connector.

Preferably, a beryllium bronze wire pressure spring is arranged between the movable arc contact and the upper cable connector.

Preferably, the intermediate contact is electrically connected to the lower cable connector.

Preferably, the inner layer of the insulating sleeve is an inner shell which is formed by epoxy resin in a die-casting mode, and the outer layer of the insulating sleeve is an outer shell which is formed by pouring silicon rubber.

Preferably, the fusing mechanism is detachably and fixedly connected to the intermediate contact through a compression nut.

Preferably, the fusing mechanism includes: a fuse wire connected to the sliding contact and a soft copper cord connected to the fuse wire; and one end of the soft rope pulling rope, which is far away from the fuse wire, is pressed by the compression nut.

In another embodiment of the present application, the inside of the insulation sleeve is provided with an installation space for assembling the arrester.

Preferably, the moving arc contact and the middle contact are both provided with sensors for acquiring the current capacity of the contact.

Preferably, one end of the insulating sleeve, which is far away from the moving arc contact, is provided with a signal conversion transmitter in signal connection with the sensor.

In the invention, the full-insulation design is adopted, and the charged part is not exposed outside, so that the safety of the product is improved, and the service life is prolonged; the fuse is simple in internal assembly, strong in current capacity and accurate in stop position; detecting the flowing capacity of the moving arc contact and detecting a signal of the moving track of the sliding contact through a sensor, and transmitting the signal by a signal conversion transmitter to obtain detection data; and the arrester and the fuse are of an integrated structure, the performance operation is stable, and certain practical popularization value is achieved.

Drawings

FIG. 1 is a schematic structural diagram of a closed type expulsion fuse provided in accordance with an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a movable contact assembly provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of a closed type expulsion fuse equipped with an arrester according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an arrester according to an embodiment of the present invention.

Reference numerals:

the device comprises an insulating sleeve-1, an upper cable joint-2, a lower cable joint-3, an air generating cylinder-4, a moving arc contact-5, a beryllium bronze wire pressure spring-6, a sliding contact-7, a middle contact-8, a stop sleeve-9, a spring-10, an insulating tube-11, a fuse-12, a soft copper pull rope-13, a compression nut-14, an anti-friction sleeve-15, a lightning arrester-16, a sensor-17, a signal conversion emitter-18, a conductive support-19 and an isolation sheath-20.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes a closed type expulsion fuse provided in an embodiment of the present application with reference to the drawings.

Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a closed-type expulsion fuse provided in accordance with an embodiment of the present invention; the closed-type expulsion fuse in the embodiment of the present application comprises: an insulating sleeve 1; the insulating sleeve 1 that adopts in this application embodiment is the interior casing of epoxy die-casting, and insulating sleeve 1's skin is the shell body that the silicon rubber was pour. In addition, the upper conductive column, the lower conductive column and the insulating sleeve 1 are cast into a whole by utilizing the casting characteristic, an upper cable joint 2 is arranged at one end of the insulating sleeve, and a lower cable joint 3 is connected to one end, far away from the upper cable joint 2, of the insulating sleeve. The upper cable joint 2 wraps the upper conductive column and the cable connected with the upper conductive column, and the lower cable joint 3 wraps the lower conductive column and the cable connected with the lower conductive column; the high strength of the cast bushing 1, particularly under extremely strong internal pressure, is only cracked, no flying fragments are generated, and the safety of the product is enhanced.

Continuing to refer to fig. 1, the gas generating device further comprises a gas generating cylinder 4 sleeved inside the insulating sleeve 1, wherein two ends of the gas generating cylinder 4 are provided with threads, one end of the threads can be connected with a movable arc contact 5 (made of copper-tungsten alloy), and the other end of the threads is connected with an insulating pipe 11.

A sliding contact 7 matched with the moving arc contact 5 is arranged in the gas generating cylinder 4 in a sliding mode, and a beryllium bronze wire pressure spring 6 is arranged between the moving arc contact 5 and the upper cable connector 2. And the end of the insulating tube 11 is provided with a spring 10 for pressing the sliding contact 7; an intermediate contact 8 is sleeved outside the insulating tube 11, and a fusing mechanism is connected between the intermediate contact 8 and the sliding contact 7.

As shown in fig. 2, the fusing mechanism is detachably and fixedly connected to the intermediate contact 8 by means of a compression nut 14. The fusing mechanism includes: a fuse wire 12 connected to the slider 7 and a soft copper cord 13 connected to the fuse wire 12; wherein, the end of the cord far away from the fuse 12 is pressed by the pressing nut 14. The fuse 12 is externally sleeved with a paper tube with a gas generating function, the right end of the paper tube is provided with an antifriction sleeve 15, and the antifriction sleeve 15 is bonded with the insulating tube 11. The intermediate contact 8, the compression nut 14, the stop sleeve 9 and the like are mounted on the outside of the insulating tube 11.

The moving arc contact 5 is provided with a small hole which can accelerate the speed of the gas flow when the gas in the gas generating cylinder 4 is sprayed out.

The sliding contact 7 can transfer the current transmitted by the gas generating cylinder 4 to the fuse wire 12, and also has the function of a gas compression piston, so that compressed air is upwards sprayed out under the compression of the first compression spring when the fuse wire 12 is fused.

The right end face of the middle contact 8 is stopped by a contact finger seat, and the left end of the second compression spring is stopped by a compression spring stop table of the middle contact 8 during brake opening, so that the compression spring can only press the gas generating cylinder 4 of the movable arc contact 5, the fuse 12 mechanism, the insulating tube 11, the stop sleeve 9 and the anti-friction sleeve 15 to move rightwards until the stop table of the gas generating cylinder 4 is contacted with the brake opening stop table of the middle contact 8 and stops moving. The anti-slow separation stop groove on the middle contact 8 is stopped by the steel ball in the middle contact finger seat assembly, so that the core part can only be hung on the middle contact 8 when the whole moving contact assembly is protected from free falling of the separating brake.

With continued reference to fig. 3 and 4, the interior of the bushing 1 is provided with an installation space for fitting the arrester 16. The moving arc contact 5 and the middle contact 8 are both provided with sensors 17 for acquiring the current capacity of the contact. The end of the insulating sleeve 1 far away from the moving arc contact 5 is provided with a signal conversion transmitter 18 which is in signal connection with the sensor 17. And the lightning arrester 16 is connected with a conductive bracket 19, and one end of the conductive bracket 19 far away from the lightning arrester 16 is connected with the outer wall of the insulating sleeve 1.

The sensors 17 are additionally arranged on the contact seat of the front moving arc contact 5 and the contact seat of the rear middle contact 8, so that the acquisition of signals of contact pressure, temperature rise, current capacity and the like can be completed.

The withstand voltage of the optical fiber is 500kV/m in a dry environment, and the optical fiber is 100kV/m beyond the dry environment. "this feature, the optical fiber is outputted from the sensor 17 and then coated along the inner surface of the housing of the insulating sleeve 1 to the signal conversion transmitter 18 mounted on the lower portion of the fuse.

Similarly, the discharge information of the lightning arrester 16 and the on/off state information of the fuse collected from the position sensor 17 mounted on the bracket and on the protection gap contact of the lightning arrester 16 are also collected to the signal conversion transmitter 18.

The signal conversion transmitter 18 then converts the various signals of the acquisition band into electrical signals that can be received by a remote device, thereby completing the on-line monitoring function.

The isolating sheath 20 plays a role in the opening and closing operation process of the fuse, and the moving contact component cannot collide with the lightning arrester 16; the insulating sheath 20 is fixed to the contact block of the intermediate contact 8. It should be specifically noted that the sensor 17 transmits the detection information of the contact by the signal conversion transmitter 18 after receiving the detection information of the contact, which is well known in the prior art and will not be described herein.

In the invention, the epoxy resin casting insulation sleeve 1 plays the role of insulation and protection, and all components (contacts and fusion tubes) are not influenced by the external environment, so that the long-term reliable and stable work of the product can be ensured, and the service life of the product is greatly prolonged. The arc extinguishing mode of the slit is adopted, gas generating materials are contained in the arc extinguishing mode, and the switch can be opened and closed manually. The hydrophobicity of the silicon rubber can improve the insulation strength by 25 percent compared with the porcelain bushing. The epoxy resin inner sleeve has good strength, and can only enable the sleeve to crack and release pressure even if the internal pressure of the sleeve is abnormally increased, so that fragments can not fly randomly and damage personnel or equipment. The full-insulation design is adopted, the charged part is not exposed outside, the safety of the product is improved, and the service life is prolonged; the fuse is simple in internal assembly, high in through-current capacity and accurate in stopping position, and has certain practical popularization value.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.