CN107645082A - Electrical connection arrangement - Google Patents

Abstract

The present invention relates to electrical connection arrangement, including diametrically ecto-entad successively the cover for seat of mutual socket joint connection, patch set and wire clamp, the end of wire clamp are connected with tail-hood.Cover for seat and patch the socket joint of set and coordinate in section, there is a circular step structure at cover for seat inwall, and its with patch set bell end between be combined with the first sealing structure, cover for seat and patch set socket joint coordinate section between be additionally provided with second seals structure；The shell of locking locking structure is also combined with the outside of cover for seat；It is sequentially provided with vertically through the second spacing insulator of inner wall surface thereof ledge structure patching in set, and the first insulator that can extend to cover for seat direction, the first location structure and the second location structure that can be cooperated are respectively equipped with the first insulator and the second insulator；Patch and insulation plugging structure is provided between set and wire clamp.The electrical connection arrangement of the present invention can realize more reliable sealing in device between each element, and can realize fast and accurately location and installation.

Description

electrical connection device

technical field

The invention relates to a safety-level electrical connection device, which is especially suitable for but not limited to the electrical connection device used in nuclear power plants.

Background technique

With the development of measurement technology, equipment such as measuring instruments and meters are used more and more widely, and these devices generally need to be connected to signal cables through electrical connection devices, so electrical connection devices have played a pivotal role in industrial connection technology. Especially in special environmental conditions, such as nuclear power plants, there are usually higher requirements for the performance of electrical connection devices. The connection of electrical connection devices must be fast and effective to prevent operators from being exposed to sensitive areas. At the same time, in addition to working under normal working conditions, the electrical connection devices of nuclear power plants must also be able to withstand conditions such as earthquakes, loss of water accidents (LOCA) and radiation conditions, so as to ensure electrical connection under severe accident conditions.

Traditional safety-level electrical connection devices generally use a single axial seal. In this structure, the gasket must be replaced every time it is disassembled and reassembled. The gasket is usually made of rubber, which is easily damaged during the installation process, and the installation quality is not easy. Guaranteed, and only one seal, it is difficult to withstand long-term radiation, high temperature and thermal aging after the LOCA accident, and eventually lead to connection failure.

Contents of the invention

The invention provides an electrical connection device to provide more reliable sealing and quick positioning, so that operators can be exposed to sensitive areas in the shortest possible time and ensure the safety of operators.

The electrical connection device of the present invention includes a seat sleeve, a socket sleeve and a wire clamp which are connected to each other in a radial direction from outside to inside in sequence, and the end of the wire clamp is connected with a tail cover. In the socket fitting section between the seat cover and the socket sleeve, an annular stepped structure is provided on the inner wall of the seat cover, and a first sealing structure is fitted between the stepped structure and the socket end of the socket sleeve. There is also a second sealing structure between the socket and mating sections of the socket sleeve; a housing with a locking structure is also equipped on the outside of the seat sleeve; a step structure through the inner wall surface is arranged in the socket sleeve along the axial direction The position-limiting second insulator and the first insulator that can extend toward the seat cover are respectively provided with a first positioning structure and a second positioning structure that can cooperate with each other on the first insulator and the second insulator; the socket sleeve and the wire An insulating sealing structure is provided between the clips.

In a general electrical connection device, since there is only one sealing mechanism, although it can generally play a sealing role, it is easily damaged due to reasons such as the operating environment and working conditions. Therefore, in the above structure, the first sealing structure respectively provided The second sealing structure and the second sealing structure can play a complementary sealing role, which can make the sealing performance more reliable. When one of the sealing structures fails, the other sealing structure can also play a sealing role, so that the sealer can operate normally.

Regarding the specific arrangement of the first sealing structure and the second sealing structure, although it is not excluded that they can be arranged in parallel as two having the same effect, a more preferred way is that the first sealing structure is the above-mentioned The sealing ring structure between the step structure on the inner wall of the seat cover and the socket mating end of the socket is used to prevent external water or water vapor from entering the device, so as to avoid the degradation or loss of the performance of the internal insulator; the second sealing structure is It may be a sealing ring structure arranged between the mating wall surface of the socket fitting section of the seat sleeve and the socket sleeve, and it is a backup sealing structure provided on the basis of the first sealing structure. Since the two sealing ring structures are set on the leakage channel, and can also be set to withstand pressure in different directions, and both have the ability to independently block external water or water vapor from entering the device, avoiding the decline or loss of insulator performance The role of the realization of double insurance. At the same time, different materials can also be used according to the different compression directions of the two to achieve a certain complementarity.

As mentioned above, the first sealing structure and the second sealing structure can be made of different materials in addition to different shapes according to the actual situation. For example, the first sealing structure can be a silicone sealing structure, and the second sealing structure can be It can be EPDM (ethylene propylene diene monomer) sealing structure with excellent ozone resistance, heat resistance, aging resistance and other properties. Through the further complementary effects of different forms of material sealing structures, it is more conducive to ensuring the insulation performance of the electrical connector and improving its reliability.

On this basis, the first insulator and the second insulator are preferably engineering plastic structures with radiation resistance, low water absorption, and high mechanical strength. The preferred material for the first insulator and the second insulator is PEEK material (polyether ether ketone, a special engineering plastic), which can meet the requirements of radiation resistance after a nuclear power plant containment accident. The first insulator and the second insulator pass through the above-mentioned The first positioning structure and the second positioning structure, which can be plugged and matched with each other, perform positioning and precise docking.

The seat cover, shell, socket sleeve, wire clip and tail cover in the structure can all be made of corrosion-resistant stainless steel.

In the above-mentioned electrical connection device, in addition to the corresponding structural forms that have been reported and/or used for the housing with the locking structure, a preferred simple structure is that the locking structures can cooperate with each other The card slot-bay pin structure.

Further, for a specific structure of the slot-bay pin, the slot can be arranged on the outer wall surface of the seat cover that is mated with the socket sleeve, and it can be used to have an open end and serve as a A curved tail section continues behind the axially extending straight groove section. The curved tail section is preferably a helical curved structure, and an anti-retreat structure is provided in the curved tail section; The slot moves and locks with the anti-retraction structure in the tail section of the slot to engage with the bayonet pin, and an elastic reset structure is arranged between the shell and the socket sleeve. In addition to this method, the arrangement of the locking groove and the bayonet pin can also adopt the opposite method. That is, the locking groove is arranged on the inner wall of the housing, and the locking pin is arranged on the corresponding outer wall of the seat cover. In addition, the curved tail section of the card slot in these structures may preferably be a helical curved structure, so that the locking or unlocking operation is smoother and more convenient.

The bayonet pin and the elastic reset structure can be made of corrosion-resistant stainless steel. The elastic reset structure can use common springs and other components; the axial limit of the elastic reset structure can be used such as stoppers, pins, snap rings, retaining rings, etc. set on the socket sleeve to limit the axial displacement of the elastic reset structure the appropriate structure. The shell is connected with the socket sleeve through an elastic return structure such as a spring and a corresponding limit structure, and can realize relative axial movement with the socket sleeve. The elastic reset structure can provide axial pre-compression or tensile force. After the bayonet pin moves along the slot to the anti-retraction structure under the elastic force against the elastic reset structure, the bayonet pin can enter the self-locking state. The detent will not exit the self-locking state by itself, except that it can be released from the self-locking state by the additional release force against the elastic force again, which improves the reliability of the bayonet pin positioning. The initial section of the card slot is an axially extending straight slot structure, which is conducive to guiding and quick insertion of the card pin, so that it can be inserted and locked more quickly, reducing the operator's operation and exposure time to sensitive areas.

A more convenient form of the above-mentioned card slot anti-retreat structure may be that the card slot is a blind slot structure with a closed end (such as a straight blind slot, or a blind slot with a curved tail, etc.) , the anti-retraction structure is arranged at the tail end (ie blind end) of the blind groove structure, and the anti-retreat structure is preferably a concave-convex structure that can hang the bayonet pins with each other. After the bayonet pin is spirally inserted into and compressed the elastic reset structure, the bayonet pin is clamped in the axial concave-convex structure at the tail of the helical slot by the restoring force of the elastic reset structure to achieve axial locking and fixing.

Further, when the first insulator in the above structure extends toward the seat cover and extends into the inner cavity space of the seat cover, in order to facilitate its fixing, a Tight fit of the extension in the seat cover.

Further, the inner side of the wire clamp is provided with a clamping structure for fixing the wire harness, for example, it may be a plurality of tooth groove structures, etc., and by cooperating with the tail cover, the external cable is fixed so that it can be effectively clamped and fastened At the same time, it can also make the deformation of the external cable uniform and symmetrical, which is convenient for effective and reliable sealing.

Further, the insulating sealing structure between the socket sleeve and the clamp may generally include an insulator fixing piece, a compression ring and a sealing ring of EPDM structure arranged in sequence along the axial direction. The electrical connection device and the external cable are sealed by a sealing ring. EPDM is ethylene propylene diene monomer, which has excellent ozone resistance, heat resistance, aging resistance, etc., and can be used between the tail of the electrical connection device and the external cable at the same time. Radiation-resistant heat-shrinkable sleeves prevent external water or steam from entering.

The first positioning structure and the second positioning structure mentioned in the above structure may respectively preferably be a plug-fit positioning pin structure extending along the axis of the seat cover. For example, the first positioning structure and the second positioning structure of the positioning pin structure may be gold-plated crimping cores or soldering cores that can be inserted into each other.

Due to the above-mentioned structure of the electrical connection device of the present invention, more reliable and sufficient sealing can be realized between the various components in the device, and it has extremely high reliability and safety performance. And it can realize fast positioning and reliable installation in place during installation, especially in harsh or even dangerous/harmful environments such as nuclear power plants, which can make operators exposed to sensitive areas in the shortest possible time, effectively ensuring the safety of operators .

The content of the present invention will be further described in detail below in conjunction with the specific implementation manners of the examples. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following examples. Without departing from the above-mentioned technical idea, various replacements or changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

Description of drawings

Fig. 1 is a schematic structural view of the electrical connection device of the present invention.

Fig. 2 is the A-direction view of the spiral groove in Fig. 1 .

FIG. 3 is a partial enlarged view of B in FIG. 2 .

detailed description

What Fig. 1 shows is a kind of electric connecting device of the present invention that can be used in nuclear power plant, comprises the socket cover 1 that connects with each other successively from outside to inside in the radial direction, socket cover 7 and wire clamp 15, the end of wire clamp 15 A tail cover 16 is connected. The inner side of the cable clamp 15 is provided with a plurality of slotted structure 151 for fixing the wire harness, etc., and through cooperation with the tail cover 16, the externally entered cables are fixed, so that they can effectively clamp and fasten the external cables. At the same time, it can also make the deformation of the external cable uniform and symmetrical, which is convenient for effective and reliable sealing. In the socket fitting section between the seat cover 1 and the socket sleeve 7, an annular stepped structure is provided on the inner wall of the seat cover 1, and a step structure is provided between it and the socket end of the socket sleeve 7 to block external water or water vapor Enter the first sealing structure 4 inside the device, and a spare second sealing structure 5 is also provided between the mating wall surface of the socket fitting section of the seat cover 1 and the socket sleeve 7 . Wherein the first sealing structure 4 can be a sealing structure made of a silicone material, and the second sealing structure 5 is a sealing structure made of an EPDM (ethylene propylene diene monomer) material. A second insulator 9 limited by a stepped structure on the inner wall surface and a first insulator 2 that can extend toward the seat cover 1 and partially extend into the inner cavity of the seat cover 1 are provided sequentially in the axial direction in the socket sleeve 7 . A conventional insulator 22 is also provided in the axial direction of the first insulator 2 and the second insulator 9 . The seat cover 1 is also provided with a tight fitting 3 for fixing the extension part of the first insulator 2 protruding into the inner cavity of the seat cover 1 . The first insulator 2 and the second insulator 9 are provided with a first positioning structure 17 and a second positioning structure 17 in the form of a gold-plated crimping core or a soldering core, which extend along the axis of the seat cover 1 and can be plugged into each other. structure18. In addition, the first insulator 2 and the second insulator 9 can also be positioned through an appropriate positioning anti-wrong insertion structure 19, and the precise docking of the first positioning structure 17 and the second positioning structure 18 of the needle core can be realized. Between the socket sleeve 7 and the clamp 15, there is an insulating sealing structure composed of an insulator fixing piece 12, a compression ring 13, and an EPDM sealing ring 14, which are all corrosion-resistant stainless steel structures, arranged in sequence along the axial direction. The electrical connection device and the external cable can be further sealed by a sealing ring 14 such as EPDM, and at the same time, a radiation-resistant heat-shrinkable sleeve can be used between the tail of the electrical connection device and the external cable to prevent external water or steam from entering. The first insulator 2 and the second insulator 9 can be made of materials with good radiation resistance, low water absorption and high mechanical strength, so as to meet the requirements of radiation resistance after a nuclear power plant containment accident. Seat cover 1 , housing 6 , socket sleeve 7 , wire clamp 15 and tail cap 16 can all be made of corrosion-resistant stainless steel; the first insulator 2 and the second insulator 9 are preferably made of PEEK (polyetheretherketone).

As shown in Figures 1 to 3, on the outer side of the socket connection section between the seat cover 1 and the socket sleeve 7, there is also a housing 6 with a locking structure, and the locking structure between the socket sleeve 7 and the housing 6 is Interoperable card slot - bayonet structure. Its specific structure is that the card groove is a blind groove structure arranged on the outer wall surface of the seat cover 1 of the socket mating part with the socket sleeve 7 and the tail end is closed, and is adopted as a straight groove section with an open end and extending axially After 20, there is a helically curved tail section 21 , and at the tail end of the curved tail section 21 , there is a concave-convex anti-retreat structure 201 that can be hooked with the bayonet pin 8 . The shell 6 is provided with a bayonet pin 8 that can move along the slot 20 and interlock with the anti-retreat structure 201 at the tail of the slot, and an elastic reset structure is arranged between the shell 6 and the socket sleeve 7 11, wherein the locking structure and the elastic reset structure 11 are made of corrosion-resistant stainless steel. The housing 6 is connected to the socket sleeve 7 through an elastic reset structure 11 such as a spring and a corresponding retaining ring 10 , and can achieve relative axial movement with the socket sleeve 7 . When the bayonet 8 enters from the straight groove section 20 and is pushed to the anti-retreat structure 201 of the curved tail section 21 along the helical curved structure, the elastic force of the elastic reset structure 11 can make the bayonet 8 enter a reliable automatic position. lock state.

Claims (10)

1. electrical connection arrangement, including the diametrically ecto-entad cover for seat that mutual socket joint connects successively（1）, patch set（7）With Wire clamp（15）, wire clamp（15）End be connected with tail-hood（16）, it is characterized in that：

Cover for seat（1）With patching set（7）Socket joint coordinate section in, in cover for seat（1）A circular step structure is provided with inwall, and at this Ledge structure is with patching set（7）Bell end between be combined with the first sealing structure（4）, in cover for seat（1）With patching set（7）Socket joint Second seals structure is additionally provided between cooperation section（5）；

In cover for seat（1）Outside be also combined with the shell of locking locking structure（6）；

Patching set（7）Inside it is sequentially provided with vertically through the second spacing insulator of inner wall surface thereof ledge structure（9）, and can be to Cover for seat（1）First insulator of direction extension（2）, in the first insulator（2）With the second insulator（9）On be respectively equipped with can be mutual The first location structure coordinated（17）With the second location structure（18）；

Patch set（7）With wire clamp（15）Between be provided with insulation plugging structure.

2. electrical connection arrangement as claimed in claim 1, it is characterized in that：It is described to patch set（7）With shell（6）Between locking knot Structure is the neck-clamping pin structure that can be cooperated.

3. electrical connection arrangement as claimed in claim 2, it is characterized in that：Described neck is arranged on patches set with described（7） The cover for seat of socket joint auxiliary section（1）It is with openend and to make axially extending straight trough section in outside wall surface（20）After continue with it is curved Bent endpiece（21）Structure, described bending endpiece is preferably spiral helicine warp architecture, bending endpiece（21）In be provided with Anti-back structure（201）；The shell（6）Be provided with can be moved along the neck and with the anti-back structure in the groove endpiece（201） The bayonet lock that phase interlocking clamp coordinates（8）, shell（6）With patching set（7）Between and be configured with elastic reset structure（11）.

4. electrical connection arrangement as claimed in claim 2, it is characterized in that：Described neck is the blind slot structure of tail end closing, Described anti-back structure（201）It is arranged on the tail end of blind slot structure, anti-back structure（201）Preferably can be with the bayonet lock（8）Phase The concaveconvex structure mutually to hang tag.

5. electrical connection arrangement as claimed in claim 1, it is characterized in that：In cover for seat（1）Interior be provided with is used to fix described first Insulator（2）Stretch into cover for seat（1）The close-fitting set of interior extending part（3）.

6. electrical connection arrangement as claimed in claim 1, it is characterized in that：The wire clamp（15）Inner side be provided with fixed beam Card holding structure（151）.

7. electrical connection arrangement as claimed in claim 1, it is characterized in that：The second seals structure（5）It is described to be arranged on Cover for seat（1）With patching set（7）Socket joint coordinate section coordinate wall between ring structure.

8. electrical connection arrangement as claimed in claim 1, it is characterized in that：It is described to patch set（7）With wire clamp（15）Between it is exhausted Edge plugging structure is the insulator stator set gradually vertically（12）, hold-down ring（13）And sealing ring（14）.

9. the electrical connection arrangement as described in one of claim 1 to 8, it is characterized in that：First location structure（17）With Two location structures（18）Respectively can be along cover for seat（1）Axis extension grafting coordinate pilot pin.

10. the electrical connection arrangement as described in one of claim 1 to 8, it is characterized in that：First sealing structure（4）With Two sealing structures（5）For the sealing structure of unlike material.