Pull rod joint structure of outdoor all-insulation drop-out fuse

Abstract

A pull rod joint structure of an outdoor all-insulation drop-out fuse is characterized in that a pull rod joint comprises a fixing part used for being connected with a fuse cylinder and a hooking part arranged on the lower end face of the fixing part, and the hooking part is provided with a vertical groove with a downward opening and a groove with a lateral opening. When the fuse assembly is installed, the pull rod connector is matched with the high-voltage operating rod, the high-voltage operating rod enters the vertical groove and is manually aligned and installed, and then the fuse cylinder is upwards installed in the fuse base. When the fuse assembly is taken down outdoors, the high-voltage operating rod is inserted into the lower part of the pull rod joint, after visual inspection is performed in place, the operating rod is twisted, the operating rod hook is screwed into the groove of the pull rod joint, and the fuse assembly can be taken down by applying force downwards, so that the fuse assembly is quick and convenient to assemble and disassemble.

Description

Technical Field

[0001] The utility model belongs to the field of electrical technology, and particularly relates to a pull rod joint structure of an outdoor fully insulated drop-out type fuse. Background Art

[0002] The drop-out fuse is the most commonly used short-circuit protection switch for 10kV distribution line branches and distribution transformers. The drop-out fuse is installed on the 10kV distribution line branch to reduce the scope of power outages. Because it has an obvious disconnection point and has the function of an isolating switch, it creates a safe working environment for the maintenance section lines and equipment. Installed on the distribution transformer, it can be used as the main protection of the distribution transformer. It has the characteristics of economy, easy operation, and strong adaptability to outdoor environments. It is widely used in the primary side of 10kV distribution lines and distribution transformers for protection and equipment switching operations, and has been popularized.

[0003] The invention of announcement number CN104752115B discloses a simple load breaker for PRW type drop-out fuse. The key points of its technical solution include an upper connecting plate, a lower connecting plate, a spring tube, an arc-extinguishing tube, a copper ring, a sleeve, an upper fuse winding seat, a lower fuse winding seat, a lead fuse and a hook. The spring tube and the arc-extinguishing tube are both bridged between the upper connecting plate and the lower connecting plate; the copper ring is arranged in the middle of the upper surface of the upper connecting plate and is located directly above the spring tube; the sleeve is arranged on the lower surface of the upper connecting plate and is located on the left side of the spring tube; the upper fuse winding seat and the lower fuse winding seat are arranged one by one at the upper and lower ends of the arc-extinguishing tube; the lead fuse is inserted in the arc-extinguishing tube. The simple load breaker is used for load-breaking the load passing through the drop-out fuse, but the operability of its hook structure can be further improved.

[0004] The utility model with announcement number CN220085954U discloses a standardized high-voltage drop-out fuse. The technical scheme includes a drop-out fuse body and a fuse tube. A mounting piece is fixedly installed on the surface of the drop-out fuse body, a mounting plate is fixedly installed on the upper surface of the mounting piece, a fixed plate is fixedly installed on one side of the mounting plate, a movable plate is arranged on one side of the mounting plate, and a buffer spring is fixedly installed on the upper surface of the fixed plate. The utility model is mainly used for hail weather. When hail falls and hits the upper surface of the movable plate, the movable plate moves downward to squeeze the buffer spring. The impact force of the hail falling is buffered by the buffer spring. The protective pad is used to provide certain protection to reduce the damage to the drop-out fuse body and the fuse tube caused by the impact force of the hail falling. At the same time, the fixed plate and the movable plate are used for protection to avoid the drop-out fuse body and the fuse tube being hit by hail and causing damage. However, the utility model does not involve much about the removal, placement and replacement of the fuse tube.

[0005] In order to facilitate quick outdoor replacement of fuses, it is necessary to develop a new fuse rod joint structure. Summary of the invention

[0006] The utility model aims to provide an outdoor fully insulated drop-out fuse tie rod joint structure in view of the above-mentioned deficiencies in the prior art, which can realize outdoor rapid replacement of the fuse and is convenient and reliable to operate.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] The pull rod joint comprises a fixing part for connecting with the fuse tube and a hooking part arranged on the lower end surface of the fixing part, and the hooking part is provided with a vertical groove opening downward and a groove opening to the side.

[0009] The lower end of the fixing part is configured as a ring-shaped structure, and the inside thereof is configured as a bell-mouth shape.

[0010] The hooking portion is configured as an arc-shaped structure and is fixedly arranged below the ring-shaped structure.

[0011] The groove comprises a hooking portion and an avoidance hole extending upward and opening straight to the side.

[0012] The fixing part and the hooking part are an integrally formed part.

[0013] A connecting shaft for connecting the fuse tube is provided above the upper end surface of the fixing portion, and the two are fixedly connected by a pin after being matched.

[0014] The beneficial effects of the utility model are:

[0015] (1) The pull rod joint structure of the outdoor fully insulated drop-out fuse includes a fixing portion for connecting with the fuse barrel and a hook portion provided on the lower end surface of the fixing portion, and the hook portion is provided with a vertical groove opening downward and a groove opening to the side. After the fuse barrel assembly of the fuse is installed, the pull rod joint is connected with the fuse barrel pin. When installing the fuse assembly, the pull rod joint cooperates with the high-voltage operating rod, the high-voltage operating rod enters the vertical groove, is manually aligned and installed, and then the fuse barrel is upwardly loaded into the fuse base; when removing the fuse assembly outdoors, the high-voltage operating rod is inserted into the lower part of the pull rod joint. After visually checking that it is in place, the operating rod is twisted to screw the operating rod hook into the groove of the pull rod joint, and the fuse assembly can be removed by applying force downward. The installation and removal are quick and convenient.

[0016] (2) The fixing part and the hook part are one-time molded parts with high structural strength and reliable quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a three-dimensional Figure 1 ;

[0018] Figure 2 The utility model is a three-dimensional Figure 2;

[0019] Figure 3 This is the installation diagram of the fuse;

[0020] Figure 4 This is a schematic diagram of the fuse removal;

[0021] Figure 5 It is a schematic diagram of the structure of the high-pressure operating lever;

[0022] Figure 6 It is a schematic diagram of the structure of the fuse base;

[0023] Figure 7 It is a structural diagram of the fusible core tube. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of 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 and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] The utility model provides a pull rod joint structure of an outdoor fully insulated drop-out fuse, such as Figures 1 to 7 shown.

[0027] A pull rod joint structure of an outdoor fully insulated drop-out fuse includes a pull rod joint 3, wherein the pull rod joint 3 includes a fixing portion 3-1 for connecting with a fuse tube and a hook portion 3-2 arranged on the lower end surface of the fixing portion 3-1, and the hook portion 3-2 is provided with a vertical groove 3-2-1 opening downward and a groove 3-2-2 opening to the side.

[0028] In this embodiment, the lower end of the fixing portion 3-1 is set as an annular structure, and its interior is set as a trumpet shape, which is convenient for inserting the high-voltage operating rod during installation and removal. The hook portion 3-2 is correspondingly set as an arc structure and fixedly arranged below the annular structure, and the groove 3-2-2 includes a hook portion and an avoidance hole extending upward and opening straight to the side. When the fuse assembly needs to be removed outdoors, the high-voltage operating rod 4 is inserted into the lower part of the pull rod joint 3. After visually checking that it is in place, the high-voltage operating rod 4 is twisted, and the hook of the high-voltage operating rod 4 is screwed from the avoidance hole into the groove 3-2-2 of the pull rod joint, and then force is applied downward to remove the fuse assembly.

[0029] A connecting shaft for connecting the fuse tube is provided above the upper end surface of the fixing part 3-1 and the two are fixedly connected by a pin after being matched. At the same time, in order to improve the structural strength, the fixing part 3-1 and the hook part 3-2 are an integrally formed part.

[0030] Furthermore, the fuse core barrel 2 of the fuse also includes a fuse barrel 2-5 and a pull rod sleeve 2-1 arranged at the end of the fuse barrel 2-5, the upper moving contact 2-4 is fixedly arranged at the upper end of the fuse barrel 2-5, the lower moving contact 2-8 is movably sleeved on the fuse barrel 2-5 and one end of the fuse 2-3 is fixedly arranged on its side wall, and the other end of the fuse 2-3 is arranged on the fuse barrel 2-5 above the pull rod sleeve 2-1; a first compression spring 1-9 is arranged between the upper part of the upper contact 1-8 and the fuse base, a second compression spring 2-2 is arranged on the fuse barrel between the lower moving contact 2-8 and the pull rod sleeve 2-1, and the fuse 2-3 pulls the second compression spring 2-2 in a compressed state. In this embodiment, a copper threaded sleeve 2-7 and an insulating positioning sleeve 2-6 are also arranged at the lower end of the upper moving contact 2-8.

[0031] During assembly, the fuse tube 2 is arranged in the fuse base 1 and passes through the transparent glass cover 1-7, and the upper moving contact 2-8 of the fuse tube abuts against the upper contact 1-8 for conduction, and the lower moving contact 2-8 of the fuse tube contacts the contact body 1-5 for conduction. In this embodiment, the fuse base 1 is set as a vertically arranged U-shaped seat, and the U-shaped seat includes an upper edge portion and a lower edge portion that are extended, the upper contact 1-8 is arranged in the installation groove of the upper edge portion, the contact body 1-5 is installed in the center hole of the lower edge portion, and the lower end of the lower edge portion is also fixed with a protective sleeve 1-4, and the inside of the protective sleeve 1-4 is opened with a guide hole extending from top to bottom, and the contact body 1-5 is located above the protective sleeve 1-4. In this embodiment, the right side wall of the U-shaped seat is set as an insulating support 1-2, and the lower end of the transparent glass cover is also fixedly installed with a guide sleeve 1-6.

[0032] When the fuse fails and falls off, force is required to separate the lower moving contact 2-4 from the contact body, and then the fuse core tube can be removed and replaced.

[0033] The fuse base 1 is provided with an incoming cable 1-1, an outgoing cable 1-3 and a transparent glass cover 1-7 for observation; the fuse base 1 located above the transparent glass cover 1-7 is provided with an upper contact 1-8 connected to the incoming cable 1-1, and the fuse base located below the transparent glass cover 1-7 is provided with a contact body 1-5 connected to the outgoing cable 1-3.

[0034] After the fuse core barrel assembly of the fuse is installed, the pull rod connector is connected to the fuse barrel pin. When installing the fuse assembly, Figure 3 As shown, the pull rod joint cooperates with the "up" head of the high-voltage operating rod, the high-voltage operating rod 4 enters the vertical slot 3-2-1, is manually aligned and installed, and then the fuse barrel is upwardly installed into the fuse base; when the fuse assembly is removed outdoors, Figure 4 As shown, insert the high-voltage operating rod 4 into the lower part of the pull rod joint 3. After visually checking that it is in place, twist the operating rod, screw the operating rod hook into the groove of the pull rod joint, and apply force downward to remove the fuse assembly. It is quick and convenient to install and remove.

[0035] If the words "first", "second" and so on are used in this patent to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description, and the above words have no special meaning.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

[0037] In the description of the present utility model, it should be understood that the terms "front", "rear", "left", "right", "center", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the protection content of the present utility model. In the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Claims

1. A pull rod joint structure of an outdoor fully insulated drop-out fuse, comprising a pull rod joint, characterized in that: The pull rod joint comprises a fixing part for connecting with the fuse tube and a hooking part arranged on the lower end surface of the fixing part, and the hooking part is provided with a vertical groove opening downward and a groove opening to the side.

2. The outdoor fully insulated drop-out fuse pull rod joint structure according to claim 1 is characterized in that: The lower end of the fixing part is configured as a ring-shaped structure, and the inside thereof is configured as a bell-mouth shape.

3. The outdoor fully insulated drop-out fuse pull rod joint structure according to claim 2 is characterized in that: The hooking portion is configured as an arc-shaped structure and is fixedly arranged below the ring-shaped structure.

4. An outdoor fully insulated drop-out fuse tie rod joint structure according to any one of claims 1 to 3, characterized in that: The groove comprises a hooking portion and an avoidance hole extending upward and opening straight to the side.

5. The outdoor fully insulated drop-out fuse tie rod joint structure according to claim 4, characterized in that: The fixing part and the hooking part are an integrally formed part.

6. The outdoor fully insulated drop-out fuse tie rod joint structure according to claim 4, characterized in that: A connecting shaft for connecting the fuse tube is provided above the upper end surface of the fixing portion, and the two are fixedly connected by a pin after being matched.

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