RU2806610C1 - Control indicator of ampoule chemical current source - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to the design of a control indicator (CI) of an ampoule chemical current source (ACCS) of a backup type. The development of the CI design meets the requirements for reliable operation, ensuring the stability of the electrical characteristics of the ACCS before and after operation, which does not require maintenance, checks and adjustments during the entire guaranteed storage period.

EFFECT: increasing the reliability of the CI operation, ensuring the accuracy of determining the moment of activation of the ACCS, at which a pressure pulse is applied to break the ACCS membrane and bring it into working condition.

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Description

The present invention relates to the field of electrical engineering, namely to the design of an indicator for monitoring an ampoule chemical current source (ACHS) of a backup type.

A control indicator device as part of an ampoule chemical current source is known from the prior art (RF patent No. 2168805, IPC N01M 6/14, “Ampoule-type chemical current source,” published 06/10/2001), made in the form of a film conductor on a dielectric substrate , which is pneumatically connected to the pressure pulse source.

The disadvantages of the prototype include a complex technical scheme for the destruction of the rupture conductor, and as a result, a significant spread in the gas pressure gradient for triggering the IR, ensuring reliable sealing of the IR with an adhesive seam with the possible loss of sealing of the IR during the warranty period of storage as a result of aging and cracking of the glue, strict limitations on the dimensions of the IR (discontinuing conductor), leading to technological difficulties in the manufacture of IC, risks of unauthorized operation of the device due to a short circuit and the associated low accuracy of determining the moment of activation of the AHIT.

The technical problem solved by the proposed invention is based on the difficulties of accurately determining the moment of activation of the AHIT, at which a pressure pulse is applied to break the AHIT membrane and the flow of electrolyte into the working cavity of the AHIT from the ampoule with the electrolyte.

The task of the authors of the invention is to develop an IC design that meets the requirements of operation reliability, ensures the stability of the electrical characteristics of the AHIT before and after operation, and does not require maintenance, checks and adjustments during the entire guaranteed storage period.

The technical result provided by the proposed invention is to increase the reliability of operation of the IR, ensuring the accuracy of determining the moment of activation of the AHIT, at which a pressure pulse is applied to the breakthrough of the AHIT membrane and bring it into working condition.

The specified problem and new technical result are ensured by the fact that, in contrast to the known control indicator in the composition of an ampoule chemical current source containing in a cylindrical body an electrical conductor that is destroyed by the influence of a physical factor as part of the IR electrical circuit connecting the IR with the AHIT to indicate the moment of activation of the AHIT, system for fastening and destroying the IR, according to the proposed invention, the electrical circuit of the IR contains a connecting conductor for connecting the electrical circuit of the IR with the electrical contacts of AKhIT, made in the form of a zigzag-shaped two-armed part with different polarity terminals, a movable electrical conductor, made in the form of a piston with the possibility of axial translational movement in the cavity of the IR housing together with the connecting conductor, an electrical conductor made of stainless steel, destroyed by the influence of a physical factor - gas pressure coming from the gas source, made in the form of a flat part, one end fixed on the inner cover of the cylindrical IR housing, and the other on the platform movable electrical conductor, in the IR housing, ring grooves are made on the outer surface of the piston of the movable contact, elastic ring parts are inserted into the annular grooves of the piston to seal the gap between the piston and the body and stop the reverse stroke of the piston of the movable conductor after the rupture of the burst conductor at the moment of activation of the ACHIT, in the lower part of the IR housing, an output contact is made and the output of the movable conductor is brought out for connection with the AKhIT contacts.

The proposed control indicator device as part of an ampoule chemical current source is explained as follows.

In fig. Figure 1 shows a general view of the proposed control indicator device, where 1 - body, 2 - moving contact, 3 - bushing, 4 - central threaded contact, 5 - elastic ring, 6 - connecting conductor, 7 - insulating bushing, 8 - sealed terminal, 9 - body contact, 10 - sealed lead bushing, 11 - sealed lead contact, 12 - electrical insulating glass, 13 - breaking conductor, 14 - plug, 15 - IR cover, 16 - plate.

The proposed device for an indicator for monitoring the operating state of AKhIT contains a housing 1, inside of which there is a movable contact 2, a plug 14 with a rupture conductor 13 installed in the threaded hole of the central threaded contact 4, a connecting conductor 6, one end of which is fixed to the protrusion of the central contact 4, the second - on contact 11 of the sealed terminal 8 and the insulating sleeve 7. On the end surfaces of the housing 1 there is a sealed terminal 8 installed on one side, and on the other - a cover 15 with a plate 16 with a discontinuous conductor 13 attached to it. A housing contact 9 is installed on the outer surface of the housing. A moving contact 2 consists of a bushing 3 made of insulating material, two elastic rings 5, a central contact 4. The sealing terminal 8 is connected by a high-temperature metal-to-glass junction with the sealing bushing 10, contact 11 and glass 12.

The closed electrical circuit between contacts 9 and 11 of the control (initial state) indicator (IC) is formed by housing 1, cover 15, plate 16, discontinuous conductor 13, plug 14, central contact 4 and connecting conductor 6 corresponds to the state of ACHIT - “non-activated”.

The opening of the circuit between contacts 9 and 11 after activation of the ACIT occurs when the conductor 13 breaks when the movable contact 2 moves in direction G (Fig. 1) under the influence of gas pressure coming from cavity B from the gas system of the ACIT, while compression and laying of the connecting conductor occurs 6 in the internal cavity of the sleeve 7. In the final position, the movable contact 2 is fixed by an elastically deformable elastic ring 5 (or one of the elastic rings of equivalent value shown in Fig. 1) in the annular groove in the body 1. In this position, the ACIT corresponds to the “activated” state.

Before installing the IR plug 14 and the breaking conductor 13, the movement and fixation in the final position of the movable contact 2 is monitored under the influence of a given force on the movable contact 2 applied in the direction G. Return to the original position is carried out mechanically using a technological auxiliary device (not shown in the drawing). shown) carried out through a threaded hole in the central contact 4.

To ensure the necessary strength of the IR to mechanical loads, the structural elements mentioned above are connected to each other by laser welding, which ensures the structural strength of the IR, tightness and electrical conductivity of the IR.

The presence or break of the electrical circuit and the resistance value of the initial and final state of the IR is determined by measuring the electrical resistance between contacts 9 and 11.

Increased requirements for non-failure operation imposed on AHIT are dictated by the need to ensure reliable and accurate control of the AHIT state: “activated - non-activated” as a result of coordinated activation of the IR and activated by a pressure pulse from the gas source - the AHIT gas system, taking into account the achievement of minimum mass-dimensional indicators and on IR and on ACHIT in general.

As shown by experimental studies and pilot testing, when using the proposed IC design, a new technical result is achieved, which consists in ensuring reliable operation of the IC with the required electrical characteristics before and after activation of the AHIT in the entire range of mechanical and temperature loads during the entire warranty period, while ensuring the requirements minimum weight, ease of installation and control of the assembly process of IR and ACHIT.

The proposed device works as follows.

Initially, a pulse with a calculated amount of displacement is applied to the sensing element of the AHIT - movable contact 2, connected to the breaking conductor 13, which, under the influence of a gas pressure pulse supplied from the gas system of the AHIT to the IR, moves, resulting in the rupture of the associated breaking conductor 13 IR and the transition of ACHIT to the “activated” state. In this case, the calculated amount of movement makes it possible to obtain a reliable break and the required electrical resistance between the contacts of the IR after the break of the breaking conductor 13. On the movable contact 2, sealing elastic rings 5 are installed, lubricated with anti-friction lubricant, to reduce the flow of gas along the side surface of the movable contact 2 and fixing it in final position by an elastic ring 5. Along the axis of the movable contact 2, a central threaded contact 4 is installed, which acts as a conductive connecting element for conductors 6 and 13, ensuring the return of the movable contact 2 to its original position. The connecting conductor 6 serves to transmit an electrical signal to the central threaded contact 4 and contact 11 of the sealed terminal 8, and is made of a zigzag shape (in the form of two arms of a part) from a metal strip with the required amount of deformation, and is installed in the provided seat of the cavity of the sleeve 7 in a free state. The electrical insulating sleeve 7 serves to prevent a short circuit of the connecting element 6 with the IR body during the movement of the movable contact 2, which ensures the safe operation of the device.

To ensure the operation of the IC, a similar factor of activation of the chemical reactor is used as in the prototype (from the same source of gas generation).

Thus, when using the proposed indicator of an ampoule chemical current source, a higher technical result is ensured than that achieved in the prototype - increasing the accuracy of determining the moment of activation of the chemical current source, at which an impulse is given to break the membrane of the chemical current source and bring it into working condition, safety, and reliability of operation .

The possibility of industrial implementation of the proposed invention is confirmed by the following example of a specific implementation.

Example 1. In laboratory conditions, the proposed control indicator (IC) ACHIT was tested on a prototype device shown in Fig. 1.

Under the conditions of this example, prototypes of the IR were manufactured and tested, both during autonomous testing of the element, and as part of a tested AHIT. The manufactured prototype contains a housing 1, a movable contact 2, a sealed terminal 8, a cover 15 with a plate 16, contacts 9 and 11 for electrical communication with the AHS, a threaded contact 4, a plug 14, a breaking conductor 13 and a connecting conductor 6, forming a closed electrical circuit, showing the state of ACHIT as “inactive”. The electrical insulation parts are bushings 3 and 7, made of polyamide grade PA6, glass 12 grade C52-1. On body 1, made of steel grade 12Х18Н10Т, there is a support flange for mounting the IR in AKHIT. Gas from the AKHIT gas system is supplied under a pressure of 25...30 atm to the movable contact 2 through the hole in the plate 16 and the segment holes formed by the surfaces of the cover 15 and plate 16. When the movable contact 2 moves, the breaking conductor 13 is destroyed, the internal electrical circuit of the IR is broken, which corresponds to the state of ACHIT - “activated”. Fixation of the moving contact in the final position is carried out by an elastic ring 5 in the annular groove of the housing 1. Reducing friction when moving the moving contact 2 is carried out by applying OKB-122 grease to the surface of the rings 5 and the inner surface of the housing 1.

As a result of research into the manufacture and testing of the assembled IC structure, the following technical characteristics were obtained:

- weight - 3.5 g;

- dimensions D 7×22 mm (excluding contacts and flange);

- electrical resistance of the circuit - no more than 1 Ohm in the initial state;

- electrical resistance of the circuit is more than 1 Mohm, in the activated state;

- response time - 0.1 s;

- gas pressure at the moment of activation - 6-8 atm;

- reliability (calculated) - not less than 0.995.

Experimental studies have confirmed the achievement, using the proposed IR ACHIT technical result, which consists in increasing the reliability of IR operation, ensuring the accuracy of determining the moment of activation of the ACHIT, at which an impulse is given to break the ACHIT membrane and bring it into working condition.

Claims (1)

A control indicator (IC) of an ampoule chemical current source (ACHIT), containing in a cylindrical housing an electrical discontinuous conductor that is destroyed by the influence of a physical factor as part of the electrical circuit of the IR, connecting the IC to the ACHIT to indicate the moment of activation of the ACHIT, a system for attaching and destroying the IC, characterized in that that the electrical circuit of the IR contains a connecting conductor for connecting the electrical circuit of the IR with the electrical contacts of AKhIT, made in the form of a zigzag two-armed part with opposite-pole leads, a movable electrical conductor made in the form of a piston with the possibility of axial translational movement in the cavity of the IR housing together with the connecting conductor , an electrical conductor made of stainless steel, destroyed by the influence of a physical factor - gas pressure coming from a gas source, made in the form of a flat part, one end fixed on the inner cover of the cylindrical IR housing, and the other on the platform of the movable electrical conductor, in the IR housing on The outer surface of the piston of the movable contact has ring grooves, elastic ring parts are inserted into the ring grooves of the piston to seal the gap between the piston and the body and stop the reverse stroke of the piston of the movable conductor after the breaking conductor breaks at the moment of activation of the AHIT, an output contact is made in the lower part of the IR body and is brought out output of a movable conductor for connection with AKhIT contacts.

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