JPH08115643A - Device for mounting insulating nozzle of gas-insulated switch - Google Patents

Abstract

PURPOSE: To provide a device for mounting the insulating nozzle of a gas- insulated switch, by which replacement work can be easily performed and measures against electric fields need not be taken from a design standpoint. CONSTITUTION: A puffer cylinder 3 has an internal thread 7 on the inner periphery of its insulating-nozzle storage portion 5 and a projection 6 so formed to be spaced from the internal thread 7 and protruding inward. An insulating nozzle 10 has, on the outer periphery of one end which can be enclosed in the insulating nozzle storage portion 5, an external thread 13 that engages with the internal thread 7 of the puffer cylinder 3 and a locking groove 12 which is spaced from the external thread 13 and locks with the projection 6 of the insulating nozzle storage portion 5. First and second slopes 11, 12b are formed, respectively, at one end of the insulating nozzle 10 and on the side of the locking groove 12 which leads to the end of the insulating nozzle 10, the angle of the second slope 12b being greater than that of the first slope 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switch, and an insulating nozzle can be easily mounted without using a mounting bracket, and the insulating nozzle is mounted with a holding force larger than the thrust at the time of mounting. It relates to the device.

[0002]

2. Description of the Related Art FIG.
It is sectional drawing of the insulation nozzle mounting apparatus in the conventional switch shown by the 2nd publication. In the figure, 1 is a rod-shaped fixed contactor, 2 is a cylindrical movable contactor that is arranged facing the fixed contactor 1 so as to be able to contact and separate, and 8 is a puffer that is arranged so that the movable contactor 2 can be axially moved. A piston, 80 is a puffer cylinder supported integrally with the movable contactor 2 so as to be movable in the axial direction,
Reference numeral 81 is an opening formed at the end of the puffer cylinder 80 to form a predetermined distance from the movable contact 2, and 82 is the movable contact 2.
It is an insulating nozzle arranged so as to cover the tip end portion of the, and is made of plastic such as tetrafluoroethylene.

Reference numeral 83 denotes an inner diameter portion of the insulating nozzle 82 which forms a predetermined distance from the movable contactor 2 on one end side, and 84 denotes an inner diameter portion which is formed on the other end side of the insulating nozzle 82 and is connected to the inner diameter portion 83 with a step. The fixed contact 1 can be inserted and removed through the opening, and the diameter gradually increases toward the other end. 85 is an insulating nozzle 82
A flange 86 is formed at one end of the flange so as to project outward, and 86 is a mounting bracket for mounting the insulating nozzle 82 to the end surface of the puffer cylinder 80, and has a plurality of bolt holes formed therein. Reference numeral 87 is a stepped portion formed on the mounting metal fitting 86 to engage with the collar 85 of the insulating nozzle 82, and 88 is a mounting screw for mounting the mounting metal fitting 86 to the puffer cylinder 80. And the puffer cylinder 80
A puffer chamber 89 is formed by the movable contactor 2 and the puffer piston 8 inside, and insulation for connecting the opening 84 of the insulating nozzle 82 and the puffer chamber 89 between the movable contactor 2 and the opening 81 and the inner diameter portion 83. A gas flow path 90 is formed.

The blow-off puffer type gas insulated switch configured as described above is arranged in an atmosphere filled with an insulating gas, and the movable contactor 2 and the puffer cylinder 80 are arranged in the leftward direction as shown by the chain line in the figure. The movable contact 2 is brought into contact with the fixed contact 1 by moving the movable contact 2 to form an energization contact portion. In this energized state, the volume of the puffer chamber 89 is expanded by the movement of the puffer cylinder 80, so that the insulating gas flows from the flow passage 90 to the puffer chamber 8.
It is filled with 9 inflow. When the movable contactor 2 and the puffer cylinder 80 are moved from the above-described energized contact state to the open state shown in the figure, the insulating gas in the puffer chamber 89 is compressed by the movement of the puffer cylinder 80, and the compressed insulating gas moves. Flow path 90 formed on the outer periphery of the contactor 2
By being sprayed toward the opening 84 of the insulating nozzle 82, the arc generated between the fixed contact 1 and the movable contact 2 is extinguished.

Next, the operation of attaching the insulating nozzle 82 to the puffer cylinder 80 will be described. Mounting bracket 8
The stepped portion 87 of 6 is fitted with the collar 85 of the insulating nozzle 82,
The insulating nozzle 82 is fixed to the buffer cylinder 80 via the mounting bracket 86 by tightening the mounting bracket 86 with the puffer cylinder 80 with the mounting screw 88.

[0006]

Since the conventional insulating nozzle mounting device for the gas insulating switch is configured as described above, the insulating nozzle 82 is caused by the stress relaxation phenomenon which is a physical characteristic of the material of the insulating nozzle 82. A screw is formed on the puffer cylinder 80 and fixed to the puffer cylinder 80 with a screw, or the insulating nozzle 82 is directly attached to the puffer cylinder 80 with a bolt or the like.
Since it can not be fastened with, it must be fixed by tightening with the mounting screw 88 using the mounting bracket 86.
There has been a problem that replacement work of the insulating nozzle 82 is troublesome. Further, since the insulating nozzle 82 is present in the gap between the switches, a high electric field is generally generated around the mounting portion of the insulating nozzle 82. Therefore, the mounting screw 88 of the mounting bracket 86 for fixing the insulating nozzle 82 is changed to the electric field. There is a problem that it is necessary to take measures for electric field design such as covering with a mitigation shield.

The present invention has been made in order to solve the above-mentioned problems, and an insulating nozzle can be attached without using a mounting bracket, and replacement work can be performed easily and electric field design can be performed. It is an object of the present invention to obtain an insulating nozzle mounting device for a gas-insulated switch that does not require the above measures.

[0008]

According to a first aspect of the present invention, there is provided an insulating nozzle mounting device for a gas insulated switch, wherein a puffer cylinder has a tubular shape having a predetermined distance from a movable contact and projects toward the fixed contact. The insulating nozzle has a female thread on the inner circumference of the insulating nozzle housing, and a protrusion protruding inward at a distance from the female thread.The insulating nozzle is one end that can be housed in the insulating nozzle housing of the puffer cylinder. The male screw of the puffer cylinder is screwed on the outer periphery of the puffer cylinder, and the engaging groove that engages with the protrusion of the insulating nozzle accommodating portion at a distance from the male screw is provided. One end of the insulating nozzle and one end side of the insulating nozzle of the engaging groove First and second inclined surfaces are respectively formed on the surfaces connected to each other, and the angle of the second inclined surface is made larger than the angle of the first inclined surface.

Further, in the insulating nozzle mounting device for the gas insulated switch according to the second aspect of the present invention, the puffer cylinder is formed in a cylindrical shape with a predetermined distance from the movable contact so as to project toward the fixed contact. The insulating nozzle has a male thread on the outer periphery and a protrusion formed on the outer periphery of the insulating nozzle at a distance from the male thread. A female thread to be screwed with the male thread, and an engaging groove that is engaged with the protrusion of the insulating nozzle holding portion at a distance from the male thread, are provided on one end of the insulating nozzle and one side of the engaging groove that is connected to the one side of the insulating nozzle, respectively. The first and second inclined surfaces are formed, and the angle of the second inclined surface is made larger than the angle of the first inclined surface.

According to a third aspect of the present invention, there is provided an insulating nozzle mounting device for a gas insulated switch, wherein the puffer cylinder is a cylinder having a predetermined distance from the movable contact, and is formed so as to project toward the fixed contact. A first insulating nozzle holding part having a protrusion protruding outwardly on a portion thereof, and a second female screw forming a gap with the first insulating nozzle holding part and forming a gap on the inner circumference in the axial direction with the protrusion. Has an insulating nozzle holding part, and the insulating nozzle has a male screw threadedly engaged with the female thread of the puffer cylinder on the outer periphery on one end side that can be fitted between the insulating nozzle holding parts, and a first insulating member with a space provided therebetween. An engaging groove that engages with the protrusion of the nozzle holding portion is provided, and the first end is formed on one end of the insulating nozzle and the end groove of the engaging groove is connected to the insulating nozzle.
And a second inclined surface is formed, and the angle of the second inclined surface is set to the first angle.
The angle is larger than the angle of the inclined surface.

According to a fourth aspect of the present invention, in the device for mounting an insulating nozzle of a gas insulated switch, the puffer cylinder is formed in a cylindrical shape having a predetermined distance from the movable contact, and protrudes toward the fixed contact side. A first insulating nozzle holding portion having a male thread formed therein, and a second insulating nozzle holding portion having a protrusion protruding inwardly and forming a gap with the first insulating nozzle holding portion. Is equipped with an internal thread on one end side that can be fitted between both insulating nozzle holding sections and a female thread to be screwed with the male thread of the puffer cylinder, and an engaging groove on the outer circumference that engages with the protrusion of the first insulating nozzle holding section. First and second inclined surfaces are respectively formed on the surfaces of one end of the insulating nozzle and one end side of the insulating nozzle that are connected to the insulating nozzle, and the angle of the second inclined surface is made larger than the angle of the first inclined surface. It is a thing.

According to a fifth aspect of the present invention, in the device for mounting an insulating nozzle of a gas insulated switch, the puffer cylinder is formed in a cylindrical shape with a predetermined distance from the movable contact, and protrudes toward the fixed contact. A first insulating nozzle holding portion having a female screw formed on the first insulating nozzle holding portion, and a second insulating nozzle holding portion having an engagement groove formed inside with a diameter smaller than that of the first insulating nozzle holding portion. The outer circumference on one end side that can be fitted into both the insulating nozzle holding portions is provided with a male screw that is screwed with a female screw of the puffer cylinder, and a protrusion that engages with an engaging groove of the second insulating nozzle holding portion. The first and second inclined surfaces are respectively formed on the connection portion of the insulating nozzle holding portion and the surface of the engagement groove that is connected to the one end side of the second insulating nozzle holding portion, and the angle of the second inclined surface is set to the first angle. The angle is larger than the angle of the inclined surface.

According to a sixth aspect of the present invention, there is provided an insulating nozzle mounting device for a gas insulated switch according to any one of the first to fifth aspects, in which the engaging groove of the protrusion is engaged with the second inclined surface. In addition, an inclined surface that engages with the second inclined surface is formed.

[0014]

In the puffer cylinder of the insulating nozzle mounting device for the gas insulating switch according to the first aspect of the present invention, the female screw formed in the insulating nozzle housing portion is screwed with the male screw of the insulating nozzle, and the protrusion is the engaging portion of the insulating nozzle. The insulating nozzle is held by engaging the mating groove.

According to a second aspect of the present invention, the puffer cylinder of the insulating nozzle mounting device of the gas insulated switchgear according to the present invention,
The male screw formed on the insulating nozzle holding portion is screwed with the female screw of the insulating nozzle, and the projection is engaged with the engaging groove of the insulating nozzle to hold the insulating nozzle.

According to a third aspect of the present invention, the puffer cylinder of the insulating nozzle mounting device for the gas insulated switchgear according to the present invention,
The female screw formed on the second insulating nozzle holding portion is screwed with the male screw of the insulating nozzle, and the protrusion formed on the first insulating nozzle holding portion engages with the engaging groove of the insulating nozzle to form the insulating nozzle. Hold.

According to a fourth aspect of the present invention, the puffer cylinder of the insulating nozzle mounting device for the gas insulated switchgear according to the present invention,
The male screw formed on the first insulating nozzle holding portion is screwed with the female screw of the insulating nozzle, and the projection formed on the second insulating nozzle holding portion engages with the engaging groove of the insulating nozzle to form the insulating nozzle. Hold.

According to a fifth aspect of the present invention, the puffer cylinder of the insulating nozzle mounting device of the gas insulated switchgear according to the present invention,
The female screw formed in the first insulating nozzle holding portion is screwed with the male screw of the insulating nozzle, and the engaging groove formed in the second insulating nozzle holding portion engages with the protrusion of the insulating nozzle to form the insulating nozzle. Hold.

According to a sixth aspect of the present invention, a puffer cylinder of an insulating nozzle mounting device for a gas insulated switchgear,
The inclined surface of the protrusion is engaged with the second inclined surface of the engagement groove to hold the insulating nozzle.

[0020]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to Embodiment 1 of the present invention, FIG. 2 is a sectional view showing a mounting operation of the insulating nozzle shown in FIG. 1, and FIG. 3 is a sectional view of the insulating nozzle shown in FIG. 4A and 4B are explanatory views showing the engagement state between the insulating nozzle and the protrusion, and FIG. 6 is an explanatory view showing the engagement state between the engagement groove and the protrusion when the insulating nozzle is removed. Is. In each drawing, 1 is a rod-shaped fixed contactor, 2 is a cylindrical movable contactor which is arranged facing the fixed contactor 1 so as to be able to contact and separate, and 3 is movable in the axial direction integrally with the movable contactor 2. The puffer cylinders 4 supported by the puffer cylinders 4 are openings formed at the ends of the puffer cylinders 3 for allowing insulating gas to flow at a predetermined distance from the movable contact 2.

Reference numeral 5 denotes an insulating nozzle housing portion projecting from the end portion of the puffer cylinder 3 toward the fixed contactor 1 and connected to the opening 4 with a step inside thereof, and is formed so that an insulating nozzle described later can be housed therein. ing. Reference numeral 6 denotes a projection having an arcuate cross section formed at a predetermined distance from one end of the insulating nozzle housing portion 5, and 7 is formed at a position farther from the one end of the insulating nozzle housing portion 5 than the projection 6 and spaced apart from the projection 6. It is a female screw. Numeral 8 is a puffer cylinder 3 which enables the movable contactor 2 to move axially
It is a puffer piston arranged inside. Then, the movable contact 2, the puffer cylinder 3, and the puffer piston 8
A puffer chamber 9 surrounded by is formed. Reference numeral 10 denotes an insulating nozzle, one end of which is formed so that it can be stored in the insulating nozzle storage portion 5 of the puffer cylinder 3, 11 is a first inclined surface formed at one end of the outer periphery of the insulating nozzle 10 and inclined at a predetermined angle θ ₁ .

Reference numeral 12 is an engaging groove formed on the outer periphery of the insulating nozzle 10 at a predetermined distance from the first inclined surface 11 to engage with the protrusion 6 of the insulating nozzle housing portion 5, and an arc portion 12a is formed in one half. A second inclined surface 12b inclined at an angle θ ₂ larger than the angle θ ₁ of the first inclined surface 11 is formed on one end side in each half. 13 is an engaging groove 12 on the outer periphery of the insulating nozzle 10.
A male screw formed at a predetermined interval and screwed into the female screw 7 of the puffer cylinder 3, 14 is an inner diameter portion formed at one end of the insulating nozzle 10 and forming a predetermined space with the movable contact 2, and 15 is an insulating nozzle. Inner diameter part 1 formed on the other end side of 10
4, the fixed contactor 1 has an opening connected to form a step.
Can be inserted and removed, and the diameter gradually increases toward the other end.
The inner diameter of the protrusion 6 of the puffer cylinder 3 is formed to have a diameter 16 smaller than the outer diameter of the insulating nozzle 10, and the opening 15 of the insulating nozzle 10 is connected to the puffer chamber 9.

Next, the operation of attaching the insulating nozzle 10 to the puffer cylinder 3 will be described with reference to FIGS. 2 and 3. As shown in FIG. 2, when the insulating nozzle 10 is inserted into the insulating nozzle housing portion 5 with the first inclined surface 11 first, the male screw 13 of the insulating nozzle 10 comes into contact with the female screw 7 of the housing portion 5 and stops. When the insulating nozzle 10 is rotated clockwise in this state, the male screw 13 is screwed with the female screw 7 and the insulating nozzle 10 is propelled in the direction of the arrow shown in the drawing, and the first inclined surface 1
It temporarily stops at the position where 1 contacts the projection 6.

When the rotational force for rotating the insulating nozzle 10 is increased in this state, the thrust of the insulating nozzle 10 causes the first
The inclined surface 11 of the insulating nozzle 10 is deformed inward while engaging with the protrusion 6, the outer periphery of the insulating nozzle 10 contacts the protrusion 6 as shown in FIG. And the engaging groove 12 engages with the projection 6 as shown in FIG.
The male screw 13 is screwed onto the female screw 7 of the insulating nozzle housing portion 5, and the engaging groove 12 is engaged with and retained by the projection 6. Further, when the insulating nozzle 10 is removed from the mounted state shown in FIG. 1, when the insulating nozzle 10 is rotated counterclockwise and the insulating nozzle 10 is moved in the removing direction, the inclined surface 12b of the engagement groove 12 is projected. Slope 12 due to contact with
It is pushed up while being deformed along b, and the insulating nozzle 10
Since the tip end portion of the above is disengaged after overcoming the dimensional difference 16, it is removed by rotating the insulating nozzle 10 counterclockwise thereafter.

Here, a contact operation and an engaging operation when the insulating nozzle 10 is attached to and detached from the insulating nozzle housing portion 5 will be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 4, the insulating nozzle 10 is rotated and propelled in the direction of the arrow shown in the drawing, and when the first inclined surface 11 at the tip comes into contact with the protrusion 6, a contact portion 11 a is formed. Due to the formation of the contact portion 17, the insulating nozzle 10 receives a force P in a direction perpendicular to the first inclined surface 11 and is deformed by a component force P ₁ according to the inclination angle θ ₁ of the first inclined surface 11. Therefore, the rotational force of the insulating nozzle 10 is divided into the component force P ₂
By rotating so as to generate a larger thrust, the tip of the insulating nozzle 10 is deformed from the broken line to the solid line as shown in FIG. 5, and this deformation causes the protrusion 6 to come into contact with the outer periphery of the insulating nozzle 10. The insulating nozzle 10 is held by overcoming the dimensional difference 16 and engaging the engaging groove 12 with the protrusion 6.

When the insulating nozzle 10 is removed from the insulating nozzle housing portion 5, that is, the puffer cylinder 3, the insulating nozzle 10 is moved in the opposite direction to that of the mounting groove 12 as shown in FIG. Second inclined surface 12b
And the projection 6 come into contact with each other. In this case, the second inclined surface 12b
Since the rotational torque required to remove the insulating nozzle 10 is determined by the axial inclination angle θ ₂ of the insulating nozzle 10, the setting of the inclination angle θ ₂ of the second inclined surface 12b to a predetermined angle results in the insulating nozzle. 10 for puffer cylinder 3
A small rotating force can be applied when the insulating nozzle 10 is attached, and a larger rotating force can be applied when the insulating nozzle 10 is removed.

By the way, when the switch is operated, the insulating nozzle 1
Torque is generated by the external force applied to 0. If this torque value is smaller than the torque value required to deform the insulating nozzle 10, the engagement between the engagement groove 12 and the protrusion 6 is not released, and therefore the engagement with the protrusion 6 is not achieved. By appropriately selecting the inclination angle θ ₂ of the second inclined surface 12b to be matched, the insulating nozzle 10
Can be reliably fixed to the insulating nozzle housing portion 5.

As described above, according to the first embodiment, the puffer cylinder 3 has a cylindrical shape with a predetermined distance from the movable contact, and the inner periphery of the insulating nozzle accommodating portion 5 formed toward the fixed contact 1 is formed. Has a female screw 7 and a protrusion 6 formed so as to project inward at a distance from the female screw 7.
Is a male screw 13 that engages with the female thread 6 of the puffer cylinder 3 on the outer periphery of one end side that can be stored in the insulating nozzle storage portion 5 of the puffer cylinder 3, and is engaged with the protrusion 7 of the insulating nozzle storage portion 5 with a gap between the male screw 13 and the male screw 13. Forming a mating engagement groove 12,
One end of the insulating nozzle 10 and the insulating nozzle 10 of the engaging groove 12
Since the first slanted surface 11 and the second slanted surface 12b are formed on the surfaces connected to one end side of the insulating nozzle 10 and the angle of the first slanted surface 11 is made small, the insulating nozzle 10 is attached to the puffer cylinder 3
Insulation nozzle 10 can be mounted with a small rotational force when mounted on the base, the angle of second inclined surface 12b is increased, and the rotational force required when detaching insulating nozzle 10 is the rotational force generated during operation of the switch. Insulation nozzle 1
0 can be securely fixed, and the insulating nozzle 10
The work to attach and detach the puffer cylinder to and from the puffer cylinder
This can be easily performed by screwing the male screw 0 of 0 and the female screw 7 of the storage portion 5 into engagement with each other and rotating them.

Example 2. FIG. 7 is a cross-sectional view showing the engagement state of the engagement groove of the insulation nozzle and the protrusion of the insulation nozzle housing portion in the insulation nozzle mounting device of the gas insulation switch according to the second embodiment of the present invention. An inclined surface 17 is formed so as to be in surface contact with and engage with the second inclined surface 12b of the insulating nozzle 10 on the protrusion 6 of the insulating nozzle housing portion 5. In this way, when the inclined surface 17 of the projection 6 and the second inclined surface 12b of the engagement groove 12 engage with each other, a load is applied to the engaging portion when a force that moves in the direction of the arrow in the figure is applied to the insulating nozzle 10. It is possible to prevent the engagement angle from changing due to the concentrated and locally deformed contact angle, which reduces the rotational force required for removal.

As described above, according to the second embodiment, the protrusion 7 of the insulating nozzle housing portion 5 has the second inclined surface 1 of the insulating nozzle 10.
Since the structure is provided with the inclined surface 17 having substantially the same angle as 2b, the insulating nozzle 10 is less likely to come off, can be securely fixed, and can be easily attached and detached.

Example 3. 8 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a third embodiment of the present invention. In the figure, reference numerals 1, 2, 8, 9, and 16 are the same as those in FIG. 18 is a puffer cylinder arranged so as to cover the movable contact 2,
The movable contactor 2 and the puffer piston 8 form a puffer chamber 9. 19 is a puffer cylinder 1
8 is a cylindrical insulating nozzle holding portion formed so as to surround the movable contactor 2 at an end portion thereof with a gap and project toward the fixed contactor 1 side, and is connected to the puffer chamber 9 between the movable contactor 2 and the movable contactor 2. The flow path 20 is formed. 21 is an insulating nozzle holder 19
Arc-shaped projections formed on the outer periphery of one end of the
Reference numeral 2 designates a male screw formed on the outer periphery of the insulating nozzle holding portion 19 at a distance from the protrusion 21.

[0032] 23 insulating nozzle bore 24 which covers the insulating nozzle holder 19 of the puffer cylinder 18 at one end is formed, 25 is first formed to be inclined at one end a predetermined angle theta ₁ of the inner diameter portion 24 Is an engaging groove formed on the inner surface of the inner diameter portion 24 at a distance from the inclined surface 25 to engage with the protrusion 22 of the insulating nozzle holding portion 19, and the arc portion 26 is formed in half.
On the other half of a, a second inclined surface 26b is formed on one end side, which is inclined at a predetermined angle θ ₂ . Reference numeral 27 denotes a female screw formed on the inner surface of the inner diameter portion 24 at a distance from the engagement groove 26 to be screwed with the male screw 22 of the holding portion 19, and 28 is connected to the inner surface of the insulating nozzle 23 by forming a step with the inner diameter portion 24. The opening is connected to the flow path 20, the fixed contact 1 can be inserted and removed, and the diameter gradually increases toward the other end. The outer diameter of the protrusion 21 of the puffer cylinder 19 is larger than the inner diameter of the inner diameter portion 24 of the insulating nozzle 23, and a dimensional difference 16 is formed between the protrusion 22 and the inner diameter portion 24.

In the insulating nozzle mounting device for the gas insulated switch according to the third embodiment, the puffer cylinder 1 is used.
No. 8 insulation nozzle holding portion 19 has an inner diameter portion 24 with insulation nozzle 2
3 is inserted, the insulating nozzle 23 is rotated clockwise, the female screw 27 is screwed with the male screw 22 of the insulating nozzle holding portion 19, and the rotational force is increased when the first inclined surface 25 contacts the protrusion 21. Then, the insulating nozzle 23 is held by deforming the tip end portion of the insulating nozzle 23 to overcome the dimensional difference 16 and engaging the engaging groove 26 with the protrusion 21.

As described above, according to the third embodiment, the puffer cylinder 18 has a cylindrical shape with a predetermined distance from the movable contact 2, and the outer periphery of the insulating nozzle holding portion 19 formed so as to project toward the fixed contact 1 side. Has a male screw 22 and a protrusion 21 formed on the male screw 22 so as to be spaced apart from the male screw 22 and project outward.
The insulating nozzle 23 has a female screw 27 that is screwed into the male thread of the puffer cylinder 18 on the inner periphery on one end side that can be inserted into the insulating nozzle holding portion 19, and a protrusion 21 of the insulating nozzle holding portion 25 that is spaced apart from the female screw 27. An engaging groove 26 for engaging is provided, and the first inclined surface 25 is provided on each of the end of the insulating nozzle 23 and the surface of the engaging groove 26 that is connected to one end of the insulating nozzle 23.
Since the second inclined surface 26b is formed and the angle of the second inclined surface 26b is made larger than the angle of the first inclined surface 25, the same effect as that of the above embodiment can be obtained and the outer periphery of the insulating nozzle can be obtained. It is possible to reduce the size and weight of the shield of the section, improve the opening speed, or reduce the operating force.

Example 4. 9 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a fourth embodiment of the present invention. In the figure, reference numerals 1, 2, 8, 9, and 16 are the same as those in the first embodiment, and therefore the description thereof is omitted. Reference numeral 29 is a puffer cylinder arranged so as to cover the movable contactor 2, and the movable contactor 2 and the puffer piston 8 form a puffer chamber 9. Reference numeral 30 denotes a cylindrical first insulating nozzle holding portion which is connected to the end portion of the puffer cylinder 29 so as to surround the movable contactor 2 with a gap and project toward the fixed contactor 1 side, and 31 denotes a first insulating nozzle holding portion. An arc-shaped projection formed at the tip of 30 to project outward, and 32 is a puffer cylinder 29.
A second insulating nozzle holding portion that is connected to the second insulating nozzle holding portion 32 and that projects toward the fixed contact 1 and has an inner diameter larger than that of the first insulating nozzle holding portion 30; 31 is a female screw formed at a predetermined interval in the axial direction.

Reference numeral 34 designates an insulating nozzle holding portion 32 having a second outer diameter.
An insulating nozzle formed to have a diameter substantially the same as the inner diameter of the second insulating nozzle 34, an inner diameter portion 35 formed at one end of the insulating nozzle 34 and having a diameter substantially the same as the inner diameter of the second insulating nozzle holding portion 30, and an inner diameter portion 35.
Is connected to the cylinder chamber 9 through the inner diameter portion 35, the fixed contact 1 can be inserted and removed, and the diameter gradually increases toward the other end. Reference numeral 37 denotes an engaging portion formed at one end of the insulating nozzle 34 with the protrusion 31 of the first insulating nozzle holding portion 30 and the step 16 and having a diameter smaller than that of the protrusion 31, and 38 at one end of the engaging portion 37. Angle θ ₁
The first inclined surface 39, 39 is formed on the insulating nozzle 34 at a predetermined distance from the first inclined surface 38 and is formed on the projection 31.
An arc groove 39a is formed in one half of the engaging groove that engages with the other half, and a second inclined surface 39b is formed in the other half of the engaging groove, the second inclined surface 39b being inclined at a predetermined angle θ ₂ . A male screw 40 is formed on the outer periphery of the insulating nozzle 34 and is screwed with the female screw 33 of the second insulating nozzle holding portion 32.

In the insulating nozzle mounting device for the gas insulated switch according to the fourth embodiment, the puffer cylinder 2 is used.
Insert one end side of the insulating nozzle 34 into the second insulating nozzle holding portion 32 of No. 9 and rotate the insulating nozzle 34 in the clockwise direction to set the male screw 40 to the female screw 33 of the second insulating nozzle holding portion 32.
When the first inclined surface 38 comes into contact with the projection 31, the rotational force is increased to deform the tip end of the insulating nozzle 34 to overcome the dimensional difference 16, and the engagement groove 39 is projected into the projection 3.
By engaging with 1, the insulating nozzle 34 is held.

As described above, according to the fourth embodiment, the puffer cylinder 29 has a cylindrical shape with a predetermined distance from the movable contact 2 and is formed so as to protrude toward the fixed contact 1 and the end thereof protrudes outward. A first insulating nozzle holding part 30 having 31;
And a second insulating nozzle holding portion 32 formed with a gap from the first insulating nozzle holding portion 30 and having a female thread 33 formed on the inner circumference thereof with a protrusion 31 axially spaced from it. A male screw 40 that is screwed into the female screw 33 of the puffer cylinder 29 on the outer periphery of one end side that can be fitted between the first and second insulating nozzle holding portions 30 and 32, and a first screw that is spaced apart from the male screw 40. An engaging groove 39 that engages with the protrusion 31 of the insulating nozzle holding portion 30 is provided, and the first and second inclined surfaces 38 are respectively formed on one end of the insulating nozzle 34 and a surface of the engaging groove 39 that is connected to one end side of the insulating nozzle 34. , 39b are formed, and the angle of the second inclined surface 39b is made larger than that of the first inclined surface 38, the same effect as the above embodiment can be obtained and the total length of the insulating nozzle mounting structure can be reduced. Is possible,
It is possible to reduce the size of the puffer cylinder.

Example 5. 10 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a fifth embodiment of the present invention. In the figure, reference numerals 1, 2, 8, 9, and 16 are the same as those in FIG. 41 is a puffer cylinder arranged to cover the movable contact 2.
The movable contactor 2 and the puffer piston 8 form a puffer chamber 9. 42 is a puffer cylinder 4
In the first insulating nozzle holding portion, which is connected to surround the movable contactor 2 at an end with a gap, and projects toward the fixed contactor 1 side,
Flow path 4 connected to puffer chamber 9 between movable contact 2
3 is formed. 44 is the first insulating nozzle holding portion 42
A male screw formed on the outer periphery of the second insulating nozzle holding portion 45, which surrounds the first insulating nozzle holding portion 42 at a predetermined distance and is formed to project to the fixed contact 1 side by a predetermined length. Reference numeral 46 denotes a protrusion formed on the end portion of the second insulating nozzle holding portion 45, which is a male screw 44 of the first insulating nozzle holding portion 45.
Is projected toward.

Reference numeral 47 denotes a first insulating nozzle holder 42 at one end.
An insulating nozzle 49 having an inner diameter portion 48 that can be inserted into
Screwed with the male screw 44 of the first insulating nozzle holding portion 42 is formed on the inner diameter portion 48 the internal thread 50 is first formed to be inclined at an angle theta ₁ one end of a predetermined outer periphery of the insulating nozzle 47
, 51 is an engaging groove formed on the outer periphery of the insulating nozzle 47 with a predetermined distance from the first inclined surface 50 and engaging with the protrusion 46 of the second insulating nozzle holding portion 45. A second inclined surface 51b, which is inclined at a predetermined angle θ ₂ on one end side of the arc portion 51a, is formed in the other half. Reference numeral 52 denotes an opening connected to the other end side of the insulating nozzle 47 by forming a step with the opening 48. The opening 52 is connected to the puffer chamber 9 through the flow path 43 so that the fixed contactor 1 can be inserted into and removed from the other end. The diameter gradually increases toward the end. The inner diameter of the protrusion 46 of the puffer cylinder 41 is smaller than the outer diameter of the insulating nozzle 47, and the step 16 is formed between the protrusion 46 and the insulating nozzle 47.

In the insulating nozzle mounting device for the gas insulated switch according to the fifth embodiment, the puffer cylinder 4 is used.
The insulating nozzle 47 is fitted into the first insulating nozzle holding portion 42 of the first and the insulating nozzle 47 is rotated in the clockwise direction so that the female screw 4
9 is screwed into the male screw 44 of the first insulating nozzle holding portion 42, and when the first inclined surface 50 comes into contact with the protrusion 46, the rotational force is increased, and the tip portion of the insulating nozzle 47 is deformed. The insulating nozzle 47 is held by overcoming the difference 16 and engaging the engagement groove 51 with the protrusion 46.

As described above, according to the fifth embodiment, the puffer cylinder 41 has a cylindrical shape with a predetermined distance from the movable contact 2 and is formed so as to project toward the fixed contact 1 and has an external thread 44 on the outside.
A first insulating nozzle holding portion 42 formed with a second insulating nozzle holding portion 45 and a second insulating nozzle holding portion 45 having a protrusion 46 that is spaced from the first insulating nozzle holding portion 42 and protrudes inward. Reference numeral 47 denotes a female thread 49 that is screwed into the male thread 44 of the puffer cylinder 41 on the inner circumference on one end side that can be fitted between the first and second insulating nozzle holding sections 42 and 45, and the second holding section 45 on the outer circumference. Of the insulating nozzle 47, and the first inclined surface 5 is formed on one end of the insulating nozzle 47 and on the surface of the engaging groove 51 connected to one end of the insulating nozzle 47.
0 and the second inclined surface 51b are formed, and the second inclined surface 51b is formed.
Since the angle is larger than that of the first inclined surface 50, it is possible to obtain the same effect as that of the above-described embodiment, and also to downsize the insulating nozzle mounting portion and the shield around the insulating nozzle outer peripheral portion. Therefore, it is possible to reduce the size and weight of the puffer cylinder, improve the opening speed, and reduce the operating force.

Example 6. 11 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a sixth embodiment of the present invention. In the figure, reference numerals 1, 2, 8, 9, and 16 are the same as those in the first embodiment, and therefore the description thereof is omitted. Reference numeral 52 denotes a puffer cylinder arranged so as to cover the movable contactor 2, and the movable contactor 2 and the puffer piston 8 form a puffer chamber 9. Reference numeral 53 denotes an insulating nozzle holding portion which is connected to the end of the puffer cylinder 52 so as to project toward the fixed contactor 1, 54 denotes a first insulating nozzle holding portion formed on the insulating nozzle holding portion 53 and having a predetermined inner diameter, 55. Is a second insulating nozzle holding portion formed with a predetermined inner diameter smaller than the first insulating nozzle holding portion 54, and 56 is a connecting portion between the first insulating nozzle holding portion 54 and the second insulating nozzle holding portion 55. A first inclined surface formed and inclined at a predetermined angle θ ₁ , 57 is a first
Female screw formed on the insulating nozzle holding portion 55 of the above, 58 is an engaging groove formed on the second insulating nozzle holding portion 55, and the circular arc portion 58a is inclined in one half at one end side at a predetermined angle θ ₂ The inclined surface 58b is formed.

Reference numeral 59 denotes an insulating nozzle, one end of which is formed so as to be inserted into each of the insulating nozzle holding portions 54 and 55 of the insulating nozzle holding portion 53, and 60 is formed on the outer periphery of the insulating nozzle 59, and the female screw 57 of the first holding portion 54 is formed. A male screw 61 to be screwed with is an insertion portion formed on one end side of the insulating nozzle 59 and has a predetermined diameter smaller than that of the second insulating nozzle holding portion 55. Reference numeral 62 denotes a protrusion formed on one end of the insertion portion 61 so as to protrude outward, and which is engaged with the engagement groove 58 of the second insulating nozzle holding portion 55.
Is an inner diameter portion formed inside the insulating nozzle 59 at a distance from the movable contact 2, and 64 is an opening portion connected to the other end side of the insulating nozzle 59 by forming a step with the inner diameter portion 63. It is connected to the puffer chamber 9 via 63, the fixed contact 1 can be inserted and removed, and the diameter gradually increases toward the other end.

In the insulating nozzle mounting device for the gas insulated switch according to the sixth embodiment, the puffer cylinder 5 is used.
The insulating nozzle 59 is inserted into the second insulating nozzle holding portion 53, that is, the first and second insulating nozzle holding portions 54 and 55, and the insulating nozzle 59 is rotated clockwise to hold the male screw 60 in the first insulating nozzle holding portion. The projection 6 is screwed into the female screw 57 of the portion 54.
When 2 comes into contact with the first inclined surface 56, the rotational force is increased to overcome the dimensional difference 16 while deforming the protrusion 62 of the insulating nozzle 59, and the protrusion 62 is engaged with the engaging groove 58. , Holds the insulating nozzle 59.

As described above, according to the sixth embodiment, the puffer cylinder 52 has a cylindrical shape with a predetermined distance from the movable contact 2, and is formed so as to project toward the fixed contact 1 and is internally threaded with the female screw 5.
7 has a first insulating nozzle holding portion 54, and a second insulating nozzle holding portion 55 having a smaller diameter than the first insulating nozzle holding portion 54 and an engaging groove 58 formed inside thereof. The insulating nozzle 59 is the first and second insulating nozzle holders 5.
A male screw 60 that is screwed into the female screw 57 of the puffer cylinder 52 and a protrusion 62 that is engaged with the engaging groove 58 of the second holding portion 55 are provided on the outer periphery on one end side that can be inserted into the first and second holes 4 and 55.
The first and second inclined surfaces 56 and 58b are formed on the connecting portion of the second insulating nozzle holding portions 54 and 55 and the surface of the engaging groove 58 that is connected to the one end side of the second insulating nozzle holding portion 55, respectively. Since the angle of the second inclined surface 58b is made larger than the angle of the first inclined surface 56, it is possible to obtain the same effect as that of the above-described embodiment and to downsize the puffer cylinder.

Example 7. 12 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a seventh embodiment of the present invention. In the figure, 1 is a rod-shaped fixed contactor, 65 is a cylindrical movable contactor that is arranged facing the fixed contactor 1 so as to be able to contact and separate, and 66 is concentric with the movable contactor 65 and the movable contactor 6.
A cylindrical insulating nozzle holder having a diameter larger than 5 and one end connected to the movable contactor 65, and 67 is an insulating nozzle holder 66.
An arc-shaped projection formed on one end side of the inner circumference of the insulating nozzle holding section 66, 68 is a female screw formed on the inner circumference of the insulating nozzle holding section 66 with a space between the projection 67, and 69 is a space formed on one end side of the insulating nozzle holding section 66. A puffer piston 70, which is opened and connected to the movable contactor 2, is an intake hole formed in the movable contactor 65, and is arranged close to the puffer piston 69.

Reference numeral 71 denotes a puffer cylinder that supports the movable contactor 2 so as to be axially movable, and forms a puffer chamber 72 in cooperation with the puffer piston 69, and 73 has an insulating nozzle housing portion 6 at one end.
6, an insulating nozzle that can be inserted into the insulating nozzle 73, a first inclined surface 74 formed at one end of the outer periphery of the insulating nozzle 73 and inclined at a predetermined angle θ ₁ , and a first inclined surface 75 on the outer periphery of the insulating nozzle 73. Insulation nozzle holding part 6 formed with a gap from 74
6 is an engaging groove that engages with the protrusion 67 of the circular arc 75a.
On the other half, a second inclined surface 75b inclined at a predetermined angle θ ₂ is formed on one end side. Reference numeral 76 denotes a male screw formed on the outer periphery of the insulating nozzle 73 with a gap between the engaging groove 75 and the male screw 68 of the insulating nozzle housing portion 66, and 77 has a gap between the movable contact 65 and one end of the insulating nozzle 73. An inner diameter portion 78 is an opening portion which is connected to the other end side of the insulating nozzle 73 by forming a step with the inner diameter portion 77. The fixed contactor 1 can be inserted into and removed from the opening portion and gradually expanded toward the other end. The inner diameter of the protrusion 67 of the insulating nozzle housing portion 66 is smaller than the outer diameter of the insulating nozzle 73, and a dimensional difference 16 is formed between the protrusion 67 and the insulating nozzle 73. In addition, the opening 78 is provided inside the movable contactor 65 and the puffer chamber 72 through the intake hole 70.
Is connected to

In the insulating nozzle mounting device for the gas insulated switch according to the seventh embodiment, the insulating nozzle 73 is inserted into the insulating nozzle housing portion 66 of the movable contact 65, and the insulating nozzle 73 is rotated clockwise to set the male screw 76. Insulation nozzle storage part 6
6 and the first slanted surface 74 is projected onto the projection 6.
7, the rotating force is increased when it comes into contact with the insulating nozzle 73.
The insulating nozzle 73 is held by deforming the tip portion of the above so as to overcome the dimensional difference 16 and engaging the engaging groove 75 with the protrusion 67. As described above, according to the seventh embodiment, the male screw 68 of the insulating nozzle 73 is screwed into the female screw 68 of the insulating nozzle housing 66 that is connected to the movable contact 65 and surrounds the movable contact 65, and the engaging groove of the insulating nozzle 73 is engaged. 75 is engaged with the protrusion 67 of the insulating nozzle housing portion 66, and the angle of the second inclined surface 75b of the engaging groove 75 is made larger than the angle of the first inclined surface 74 at the tip of the insulating nozzle 73. Of course, it is possible to obtain the same effect as that of the above-mentioned embodiment and to apply it to a suction puffer type gas insulated switch.

Example 8. In the second embodiment, the projection 6 is formed on the puffer cylinder 3 and the engagement groove 12 is formed on the insulating nozzle 10. However, as shown in the sixth embodiment, the projection 62 is formed on the insulating nozzle 59. And again
Even if the engagement groove 58 is applied to the puffer cylinder 52, the same effect can be obtained.

[0051]

As described above, according to the first aspect of the present invention, the puffer cylinder is of a cylindrical shape having a predetermined distance from the movable contact, and the puffer cylinder of the insulating nozzle accommodating portion is formed protruding toward the fixed contact. It has a female screw on the inner circumference and a protrusion formed to project inward at a distance from this female screw.The insulating nozzle can be stored in the insulating nozzle housing part of the puffer cylinder. A male screw for mating and an engaging portion that engages with the protrusion of the insulating nozzle housing at a distance from the male screw are provided.
And the second inclined surface is formed, and the angle of the second inclined surface is made larger than the angle of the first inclined surface, so that the female screw formed in the insulating nozzle housing portion is screwed with the male screw of the insulating nozzle. At the same time, since the protrusion is engaged with the engaging groove of the insulating nozzle to hold the insulating nozzle, the insulating nozzle can be securely fixed without using a mounting bracket, and the replacement work can be easily performed. It is possible to obtain the mounting of the insulating nozzle of the gas insulated switch which facilitates the electric field design.

Further, according to the second aspect of the present invention, the puffer cylinder is a tubular shape having a predetermined distance from the movable contact and is formed on the outer periphery of the insulating nozzle holding portion formed so as to project toward the fixed contact side. And a projection formed to project outward with a gap from this male screw, and the insulating nozzle has a female screw threadedly engaged with the male screw of the puffer cylinder on the inner periphery of one end side that can be fitted into the insulating nozzle holding portion, and Equipped with an engaging portion that engages with the protrusion of the insulating nozzle holding portion at a distance from the female screw,
First and second inclined surfaces are respectively formed on a surface of one end of the insulating nozzle and a surface of the engaging groove that is connected to one end side of the insulating nozzle.
By making the angle of the inclined surface larger than the angle of the first inclined surface, the male screw formed in the insulating nozzle holding portion is screwed with the female screw of the insulating nozzle, and the protrusion is engaged with the engaging groove of the insulating nozzle. Since the insulating nozzle is held by fitting it, the insulating nozzle can be securely fixed without using a mounting bracket, and the replacement work can be easily performed, and the insulating nozzle of the gas-insulated switch for easy electric field design A mounting device can be obtained.

According to the third aspect of the present invention, the puffer cylinder has a cylindrical shape with a predetermined distance from the movable contact and is formed so as to protrude toward the fixed contact side and has an outwardly protruding projection at the end thereof. A first insulating nozzle holding part and this first
Has a second insulating nozzle holding portion which is spaced from the insulating nozzle holding portion and which has a female thread formed on the inner circumference thereof so as to be axially spaced from the projection, and the insulating nozzle is fitted between both insulating nozzle holding portions. One end of the insulating nozzle and the engaging groove are provided on the outer circumference of one end side that can be provided with an external thread that is screwed into the internal thread of the puffer cylinder, and an engaging groove that is engaged with the protrusion of the first insulating nozzle with a gap from the external thread. The second insulating nozzle is formed by forming the first and second inclined surfaces on the surface connected to one end side of the insulating nozzle, and making the angle of the second inclined surface larger than the angle of the first inclined surface. Since the female screw formed on the holding portion is screwed with the male screw of the insulating nozzle, and the projection formed on the insulating nozzle holding portion of item 1 engages with the engaging groove of the insulating nozzle to hold the insulating nozzle. Reliable fixing of the insulation nozzle without using metal fittings Possible, it is possible to perform the replacement work can be easily obtained insulating nozzle mounting arrangement facilitates gas insulated switchgear of an electric field design.

According to a fourth aspect of the present invention, the puffer cylinder is a first cylindrical member having a predetermined distance from the movable contact member and formed so as to project toward the fixed contact member and has an external thread formed on the outer side. There is an insulating nozzle holding portion and a second insulating nozzle holding portion that is spaced apart from the first insulating nozzle holding portion and has a protrusion protruding inward, and the insulating nozzle is fitted between both insulating nozzle holding portions. A female thread that is screwed into the male thread of the puffer cylinder is provided on the inner periphery of the insertable one end side, and an engagement groove that engages with the protrusion of the first insulating nozzle holding portion is provided on the outer periphery. The first and second inclined surfaces are respectively formed on the surfaces connected to one end side of the insulating nozzle, and the angle of the second inclined surface is made larger than the angle of the first inclined surface. The male screw formed on the part is the same as the female screw of the insulating nozzle. At the same time, the projection formed on the second insulating nozzle holding portion engages with the engaging groove of the insulating nozzle to hold the insulating nozzle, so that the insulating nozzle can be securely fixed without using a mounting bracket. Thus, it is possible to obtain an insulating nozzle mounting device for a gas insulated switch, which can be easily replaced and in which electric field design is easy.

According to a fifth aspect of the present invention, the puffer cylinder is a first cylinder having a movable contact and a predetermined space formed to project toward the fixed contact, and a female screw formed inside. It has an insulating nozzle holding part and a second insulating nozzle holding part having an engagement groove formed inside with a diameter smaller than that of the first insulating nozzle holding part, and the insulating nozzles can be inserted into both insulating nozzle holding parts. A male screw screwed into the female screw of the puffer cylinder and a projection engaged with the engagement groove of the second insulating nozzle holding portion are provided on the outer periphery of the one end side, and a connecting portion between the first and second insulating nozzle holding portions and First and second inclined surfaces are respectively formed on the surfaces of the engaging groove that are connected to the one end side of the second insulating nozzle holding portion, and the angle of the second inclined surface is made larger than the angle of the first inclined surface. As a result, the female screw formed on the first insulating nozzle holder is completely removed. Since the engaging groove formed in the second insulating nozzle holding portion engages with the protrusion of the insulating nozzle to hold the insulating nozzle while being screwed with the male screw of the nozzle, the insulating nozzle can be securely mounted without using a mounting bracket. It is possible to obtain an insulating nozzle mounting device for a gas insulated switch, which can be easily fixed, can be easily replaced, and whose electric field can be easily designed.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the engaging groove engages with the second inclined surface of the engaging groove of the protrusion formed in the insulating nozzle housing portion of the puffer cylinder. By forming an inclined surface that engages with the second inclined surface on the side where the insulating nozzle is held, the protrusion is engaged with the engaging groove to hold the insulating nozzle, and thus the insulating nozzle can be easily mounted. It is possible to obtain an insulating nozzle mounting device for a gas insulated switch which can prevent the engagement from being disengaged when a force is applied in the detaching direction.

[Brief description of drawings]

FIG. 1 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a mounting operation of the insulating nozzle shown in FIG.

FIG. 3 is a cross-sectional view showing a deforming operation of the insulating nozzle shown in FIG.

FIG. 4 is an explanatory diagram of engagement between the insulating nozzle and the protrusion shown in FIG.

FIG. 5 is an explanatory diagram of engagement between the insulating nozzle and the protrusion shown in FIG.

FIG. 6 is an explanatory view of the engagement between the engagement groove and the protrusion when the insulating nozzle shown in FIG. 1 is removed.

FIG. 7 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a second embodiment of the present invention.

FIG. 8 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a third embodiment of the present invention.

FIG. 9 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a fourth embodiment of the present invention.

FIG. 10 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a fifth embodiment of the present invention.

FIG. 11 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a sixth embodiment of the present invention.

FIG. 12 is a sectional view of an insulating nozzle mounting device for a gas insulated switch according to a seventh embodiment of the present invention.

FIG. 13 is a cross-sectional view of a conventional insulating nozzle mounting device for a gas insulated switch.

[Explanation of symbols]

1 fixed contactor, 2,65 movable contactor, 3,18,2
9, 41, 52, 71 puffer cylinder, 4 openings,
5 Insulation nozzle storage part, 6, 21, 31, 46, 62,
67 protrusions, 7, 27, 33, 49, 57, 68 female screw, 8, 69 puffer piston, 9, 72 puffer chamber 10, 23, 34, 47, 59, 73 insulating nozzles 11, 25, 38, 50, 56,74 1st inclined surface, 11a contact part, 12, 26, 39, 51, 58,
75 engagement grooves, 12a, 26a, 39a, 51a, 58
a, 75a arc part, 12b, 26b, 39b, 51
b, 58b, 75b second inclined surface, 13, 22, 4
0,44,60,76 male screw, 14,24,48,3
5,63,77 inner diameter part, 15,28,36,52,6
4,78 opening, 16 dimensional difference, 17 inclined surface, 1
9, 53, 66 insulating nozzle holding part, 20, 43 flow path, 30, 42, 54 first insulating nozzle holding part, 3
2, 45, 55 2nd insulating nozzle holding part, 37 engaging part, 61 insertion part, 70 intake hole.

Claims (6)

[Claims] 1. A cylindrical movable contact arranged opposite to a rod-shaped fixed contact so as to be able to come in contact with and separate from the rod-shaped fixed contact, and a puffer cylinder in which the movable contact is attached to an end portion and axially movably supported. An insulating nozzle in which the movable contact is surrounded by an axis and one end is attached to the puffer cylinder and the other end has an opening into which the fixed contact can be inserted, and the opening is connected to a puffer chamber of the puffer cylinder. In a device for mounting an insulating nozzle of a gas insulated switch equipped with a puffer cylinder, the puffer cylinder is formed in a tubular shape with a predetermined distance from the movable contact and protrudes toward the fixed contact side. The insulating nozzle has a protrusion formed to protrude inward at a distance from the female screw, and the insulating nozzle is attached to the insulating nozzle housing portion of the puffer cylinder. A male screw screwed with the female screw of the above, and an engaging groove that engages with the projection of the insulating nozzle accommodating portion at a distance from the male screw, one end of the insulating nozzle and one end of the insulating nozzle of the engaging groove. Insulation of a gas-insulated switch, characterized in that first and second inclined surfaces are respectively formed on the surfaces connected to the side, and the angle of the second inclined surface is made larger than the angle of the first inclined surface. Nozzle mounting device. 2. A cylindrical movable contact arranged opposite to a rod-shaped fixed contact so as to be able to come into contact with and separate from the rod-shaped fixed contact, and a puffer cylinder in which the movable contact is attached to an end portion and axially movably supported. An insulating nozzle in which the movable contact is surrounded by an axis and one end is attached to the puffer cylinder and the other end has an opening into which the fixed contact can be inserted, and the opening is connected to a puffer chamber of the puffer cylinder. In a device for mounting an insulating nozzle of a gas insulated switch equipped with a puffer cylinder, a male screw is formed on the outer periphery of an insulating nozzle holding part formed in a cylindrical shape with a predetermined distance from a movable contact and protruding toward the fixed contact, and The insulating nozzle has a protrusion formed so as to project to the outside with a gap, and the insulating nozzle is screwed with the male screw of the puffer cylinder on the inner periphery of one end side that can be fitted into the insulating nozzle holding portion. A female screw and an engaging groove that is engaged with the protrusion of the insulating nozzle holding portion at a distance from the female screw, and is provided on one end of the insulating nozzle and a surface of the engaging groove that is connected to one end side of the insulating nozzle, respectively. First and second
Of the first slanted surface and the angle of the second slanted surface is set to the first slanted surface.
An insulating nozzle mounting device for a gas insulated switch, characterized in that the angle is larger than the angle of the inclined surface. 3. A cylindrical movable contact arranged opposite to a rod-shaped fixed contact so as to be able to come into contact with and separate from the rod-shaped fixed contact, and a puffer cylinder in which the movable contact is attached to an end portion and axially supported. An insulating nozzle in which the movable contact is surrounded by an axis and one end is attached to the puffer cylinder and the other end has an opening into which the fixed contact can be inserted, and the opening is connected to a puffer chamber of the puffer cylinder. In the device for mounting an insulating nozzle of a gas insulated switch, the puffer cylinder has a cylindrical shape with a predetermined distance from the movable contact and is formed to project toward the fixed contact, and has a protrusion protruding outward at the end. A first insulating nozzle holding portion, and a second insulating nozzle holding portion which is formed with a space from the first insulating nozzle holding portion and has a female screw formed on the inner circumference at a distance from the protrusion in the axial direction, Insulation The slur is formed on the outer periphery of one end side that can be fitted between the both insulating nozzle holding portions, with a male screw that is screwed with the female screw of the puffer cylinder, and with the protrusion of the first insulating nozzle holding portion at a distance from the female screw. An engaging groove for engaging is provided, and the first and second surfaces are respectively connected to one end of the insulating nozzle and a surface of the engaging groove connected to one end of the insulating nozzle.
Of the first slanted surface and the angle of the second slanted surface is set to the first slanted surface.
An insulating nozzle mounting device for a gas insulated switch, which is larger than the inclined surface of the. 4. A cylindrical movable contact arranged opposite to a rod-shaped fixed contact so as to be able to come into contact with and separate from the rod-shaped fixed contact, and a puffer cylinder in which the movable contact is attached to an end portion and axially movably supported. An insulating nozzle in which the movable contact is surrounded by an axis and one end is attached to the puffer cylinder and the other end has an opening into which the fixed contact can be inserted, and the opening is connected to a puffer chamber of the puffer cylinder. In an insulating nozzle mounting device for a gas insulated switch, the puffer cylinder is a cylindrical shape having a predetermined distance from a movable contact and is formed so as to protrude toward the fixed contact side, and a male screw is formed on the outside. It has a nozzle holding part and a second insulating nozzle holding part which is spaced apart from the first insulating nozzle holding part and which is formed with a protrusion protruding inward, and the insulating nozzle is provided between the two insulating nozzle holding parts. One end of the insulating nozzle is provided with an internal thread on one end side that can be inserted and inserted, and an internal thread that is screwed with the male thread of the puffer cylinder, and an engaging groove that engages with the protrusion of the first insulating nozzle holding portion on the outer circumference. And a first and a second surface, respectively, on a surface of the engagement groove connected to the one end side of the insulating nozzle.
Of the first slanted surface and the angle of the second slanted surface is set to the first slanted surface.
An insulating nozzle mounting device for a gas insulated switch, which is larger than the inclined surface of the. 5. A cylindrical movable contact arranged opposite to a rod-shaped fixed contact so as to be able to come into contact with and separate from the rod-shaped fixed contact, and a puffer cylinder in which the movable contact is attached to an end portion and axially movably supported. An insulating nozzle in which the movable contact is surrounded by an axis and one end is attached to the puffer cylinder and the other end has an opening into which the fixed contact can be inserted, and the opening is connected to the puffer cylinder puffer chamber. In an insulating nozzle mounting device for a gas insulated switch, the puffer cylinder has a tubular shape with a predetermined distance from a movable contact and is formed to project toward the fixed contact side and has a female screw formed inside. It has a nozzle holding part and a second insulating nozzle holding part having an engagement groove formed inside with a diameter smaller than that of the first insulating nozzle holding part, and the insulating nozzle can be inserted into both of the insulating nozzle holding parts. A male screw screwed into the female screw of the puffer cylinder and a protrusion that engages with the engagement groove of the second insulating nozzle holding portion are provided on the outer periphery of the one end side, and the first and second insulating nozzle holding portions are provided. The first and second inclined surfaces are formed on the surfaces of the connecting portion and the engaging groove that are connected to the one end side of the insulating nozzle supporting portion, and the angle of the second inclined surface is set to be smaller than that of the first inclined surface. Insulated nozzle mounting device for gas-insulated switch characterized by large size. 6. The inclined surface which engages with the second inclined surface is formed on the side of the engagement groove of the protrusion which engages with the second inclined surface. An insulating nozzle mounting device for a gas insulated switch according to claim 1.