The invention discloses a sulfur hexafluoride gas density relay assembling joint capable of preventing maloperation. The assembling joint comprises a valve seat, a self-sealing valve device and a blocking component, wherein the valve seat is internally provided with a relay ventilating passage, a switch ventilating passage and a self-sealing valve ventilating passage which are communicated with one another. When having no external transition joint, the self-sealing valve device can automatically enable gas circuits of the relay ventilating passage and the switch ventilating passage to be communicated; when having an external transition inflation joint, the self-sealing valve device can enable the gas circuits of the transition inflation joint and the switch ventilating passage to be communicated, thus inflating a sulfur hexafluoride electrical switch; when having an external check transition joint, the self-sealing valve device can enable gas circuits of the relay ventilating passage and the switch ventilating passage to be sealed, so that the check of a density relay can be realized without the diassembly of the density relay and the need of the additional passage opening and closing operations, the sealing of the sulphur hexafluoride electric switch can be guaranteed, and the check maloperation can be thoroughly prevented.

Sulfur hexafluoride gas density relay assembling joint capable of preventing maloperation

The invention discloses a flame-proof switch which comprises a shell and a conversion switch, wherein the conversion switch is arranged in the shell and is provided with a wiring terminal, the wiring terminal is provided with an outgoing lead which extends outside the shell, one end of the conversion switch is provided with a switch connecting shaft, an operation device is arranged at one end of the switch connecting shaft, which is far from the conversion switch, the switch connecting shaft passes through one end of the shell, and a sealing piece is arranged at one end of the shell, which is far from the switch connecting shaft. The flame-proof switch is capable of realizing leading outage so as to cut off power before a cover is opened; moreover, sparks generated when the switch is in use are all in a switch protective shell and cannot be transferred to a wiring cavity of equipment to form an ignition source. In addition, the flame-proof switch has the advantages of simple operation, convenience in installation and reliable casting.

Flame-proof switch

Forming method for assembling connector of gas density relay capable of preventing misoperation

The present invention relates to an arrangement comprising a housing (2) and at least one busbar (4) for connecting a printed circuit board, which is arranged in the housing (2), to a power supply which is present outside the housing (2), wherein the housing (2) has an aperture (3) out of which the busbar (4) projects, wherein a ferrite core (10) and a moulded seal (5), which accommodates the ferrite core (10), are inserted into the housing aperture (3) in a media-tight manner, and the moulded seal (5) containing the ferrite core (10) surrounds the busbar (4) in a form-fitting manner.

Media tight housing

The invention relates to a t-junction used for detecting a pointer type SF6 gas density controller, and belongs to the technical field of electric power electrical equipment detection joints. The t-junction is composed of a multi-pass joint base, a self-styled valve component, an open valve mechanism and the like, wherein the upper part of the multi-pass joint base is connected to an electrical equipment main body through a connecting head, the lower part of the multi-pass joint base is connected to the gas density controller through a controller base; air inlet holes are formed in the top of a mounting hole of the self-styled component inside the multi-pass joint base, air outlet holes are formed in the upper part of a mounting hole of the open valve mechanism; the self-styled valve component is arranged inside the mounting hole of the self-styled valve component, the open valve mechanism is arranged inside the mounting hole of the open valve mechanism, the self-styled valve component is composed of a valve rod, a valve core, a spring, a blocking element and a sealing element; the open valve mechanism is composed of a top rod, a nut, a blocking ring and a sealing ring; the open valve mechanism is movably connected to the valve core of the self-styled valve component through the top rod, a spring is arranged on the valve rod of the self-styled valve component. Detection can be conducted without dismantling; in addition, the t-junction used for detecting the pointer type SF6 gas density controller has simple structure, convenient operation, good sealing effect, and is safe and reliable to use.

T-junction used for detecting pointer type SF6 gas density controller

The utility model relates to a connecting device for checking a gas density relay, and the connecting device can ensure airtightness and safety. The connecting device comprises a multi-pass joint seat which is at least provided with a first interface for connecting the relay, a second interface for connecting a switch body and a third interface for connecting a transition joint, a valve opening mechanism, a stop valve and a protective cover, wherein, the multi-pass joint seat is internally provided with a first air channel, a second air channel and a third air channel which are communicated with each other and correspond to the first interface, the second interface and the third interface. Under a normal condition, a sealing element on a valve rod of a self-sealing valve is sealed with an orifice of a valve opening main body, and a sealing element on the stop valve body is separated from an orifice between the middle air channel and the rear air channel in the third air channel so that the second air channel is communicated with the first air channel; and when the valve opening mechanism is removed, the sealing element on the stop valve body is sealed with the orifice between the middle air channel and the rear air channel in the third air channel so that the second air channel is separated from the first air channel.

Connecting device for checking gas density relay

The utility model discloses a sealing structure of contact outgoing lines of a gas density relay. The sealing structure comprises a relay shell, an outgoing line seat, inner and outer outgoing lines, conductive components, sealing components and a sheath, wherein the outgoing line seat is welded on the surface of the shell; the inner and outer outgoing lines are respectively connected with the internal and external ends of the conductive components, and the conductive components are partially or completely embedded into holes of the sealing components; the conductive components and the sealing components are hermetically fixed in the cavity of the outgoing line seat by insulating components and fixing components, so that a plurality of conductive components are in insulating connection with each other, and the conductive components are in insulating connection with the outgoing line seat; the parts, which are arranged in the cavity of the outgoing line seat, of the outer outgoing lines are fixed by binders; and the sheath is covered on the outer ends of the bonders, the end face of the sheath is provided with a plurality of outlet holes, so that the outer outgoing lines are led out from the outlet holes. By utilizing the sealing structure provided by the utility model, the sealing performance of the whole relay shell is better, and no air leakage phenomenon happens, thus the sealing quality of a product is greatly improved, and the service life of the product is further improved.

Sealing structure of contact outgoing lines of gas density relay

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Connecting device for checking gas density relay

Sealing structure of contact outgoing lines of gas density relay