CN218505875U

CN218505875U - Movable and static contact point group matching structure of close-contact checker

Info

Publication number: CN218505875U
Application number: CN202222891600.4U
Authority: CN
Inventors: 徐飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-02-21
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses a close-fitting inspection device moves quiet contact group cooperation structure. The movable contact group can swing relative to the static contact group to realize contact or separation, the static contact group also comprises at least one static contact component which is installed through a support column and extends out of the static contact block, each static contact component consists of a pair of left static contact arms and right static contact arms, and each left static contact arm and each right static contact arm are provided with an upper wing part and a lower wing part which are independent; the movable contact group also comprises at least one movable contact component which extends out of the top of the movable contact block and consists of a contact column, a contact ring sleeved on the contact column and a limiting nut which is arranged on the contact column and used for limiting and preventing the contact ring from falling off. The advantages are that: the contact reliability is ensured, the surface breaking phenomenon is avoided, the influence of dust on the electric conductivity is avoided, and the problem of arc discharge damage is effectively solved. The phenomenon that the split pin is broken in the prior art is eliminated.

Description

Movable and static contact point group matching structure of close-contact checker

Technical Field

The utility model relates to a part structure in the close-fitting inspection ware, specific close-fitting inspection ware moves quiet contact group cooperation structure that says so.

Background

The railway switch close contact checker is used for detecting the close contact and repulsion states of switch tongue rails or point rails. The contact of JM2 type close contact checker is connected in series in the indicating signal loop of the turnout, when the close contact switch rail has a horizontal clearance of more than 5mm with the stock rail or the distance between the close contact switch rail and the stock rail is not up to the specified distance, the close contact checker arranged at the position can cut off the indicating circuit and send out an alarm signal.

For the contact group of the existing JM2 type close contact checker, it is composed of a movable contact group and a stationary contact group, wherein the stationary contact group is usually composed of a stationary contact block, a left (right) contact piece and a left (right) reinforcing piece, etc., the movable contact group is mainly composed of a contact column, a contact ring and a movable contact block, etc., the swing of the movable contact group realizes the contact conduction or separation with the stationary contact group for transmitting the corresponding signal, traditionally, the left contact piece and the right contact piece of the stationary contact group are both single-piece sheet structure (or called single-wing contact piece), and after the contact column and the movable contact block in the movable contact group are molded at the same time, the contact ring is sleeved on the contact column, a small hole is drilled at the top of the contact column for installing an open pin as a stop, therefore, the above-mentioned structure usually has the following defects:

(1) Because the static contact group adopts the structure of the single-wing contact piece and the reinforcing piece, the contact strength and the redundancy design of the static contact group are lacked, the contact group is easy to break due to the over-road vibration in the process of a train passageway, sometimes the train can automatically recover the connection after running, and sometimes manual intervention is needed.

(2) The static contact piece and the contact ring of the contact group of the JM2 type seal detector adopt a nickel plating process, shear friction is generated between the static contact piece and the contact ring in the operation process, and the nickel layer of the contact part of the static contact piece and the contact ring falls off and adheres to the contact part of the contact piece after long-time operation. The parts in the box body of the switch machine are painted, the paint usually contains a large amount of formaldehyde, the formaldehyde in the paint is promoted to be released in a large amount due to high temperature in high-temperature weather, the box body of the switch machine is usually semi-sealed, the released formaldehyde is accumulated in the box body, if high-humidity environment (such as rain and high moisture in air) is accompanied during high temperature, the accumulated formaldehyde gas in the box body can generate chemical reaction with oxygen and water vapor to generate formic acid (namely, the phenomenon of hair growing is generally known by pedestrians), the formic acid can generate chemical reaction with a nickel layer peeled off from a contact part of a contact piece to generate nickel formate, and the nickel formate belongs to an insulating substance, and then the problem of non-conduction of the contact group can be directly caused.

(3) The movable contact group of JM2 type density detector adopts a cotter pin as a stopping way at present, when the movable contact group moves to one side, the movable contact ring generates very large inertia force to impact on a stopping part, the inertia force is concentrated on a contact part of the contact ring and the cotter pin, and the cotter pin can be broken after a long time.

(4) The JM2 type closed detection device movable contact block is provided with two mounting holes on the left and right of the lower half part of the movable contact block, the two mounting holes can indirectly reduce the strength of the movable contact block, and if uncontrollable factors in the mould pressing process are added, the strength of the movable contact block can be reduced. When the movable contact group moves to one side, the movable contact block generates a very large inertia force, and if the above factors are added, the inertia force can make the movable contact block break off at the same time.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a close-fitting inspection ware moves quiet contact group cooperation structure of effectively avoiding contact group to show absolutely, the contact does not switch on and contact piece fracture scheduling problem.

In order to solve the technical problem, the utility model discloses a close subsides inspection device double-wing contact group integrated configuration, including the stationary contact group that has the stationary contact piece and the movable contact group that has the movable contact piece, movable contact group can swing relative stationary contact group and realize the contact or break away from, stationary contact group still includes at least one through the support column installation and stretch out the stationary contact piece outside stationary contact piece stationary contact subassembly, each stationary contact subassembly comprises a pair of left stationary contact arm and right stationary contact arm, each left stationary contact arm and right stationary contact arm all have upper and lower two independent alar parts; the movable contact group also comprises at least one movable contact component which extends out of the top of the movable contact block and consists of a contact column, a contact ring sleeved on the contact column and a limiting nut which is arranged on the contact column and used for limiting and preventing the contact ring from falling off.

The upper end of each contact column is provided with a section of threaded section, the connection part of the threaded section and the contact column forms a step, and the limiting nut can be limited on the step so that the contact ring can rotate freely.

Each wing part comprises a static joint sheet and a reinforcing sheet matched with the static joint sheet.

The static contact group is fixedly installed on the base, and the movable contact group is hinged to the base through a rotating shaft.

And each left static contact arm and each right static contact arm are respectively arranged on one support column.

And a gasket pressed between the limiting nut and the step is sleeved on the thread section.

And the lower half part of the movable contact block is provided with a reinforcing rib.

The width of each static joint sheet is more than 5 mm.

The utility model has the advantages that:

(1) Because each left static contact arm and each right static contact arm are provided with an upper wing part and a lower wing part which are independent, a double-wing structure is formed respectively, and therefore the double-wing structure is ingeniously utilized, on one hand, two independent static contact pieces in the double-wing structure can be contacted with the movable contact group at the same time, even if one static contact piece is separated when passing vibration occurs, the other static contact piece can still be contacted, the contact reliability is guaranteed, the occurrence of the phenomenon that the contact group is broken due to the passing vibration is avoided, on the other hand, the two independent static contact pieces are provided with a plurality of side edges, therefore, the dust can be cleaned by the plurality of side edges in the relative motion process, the influence on the electric conductivity of the dust is avoided, moreover, the two independent static contact pieces can be separated from the movable contact group in sequence, overlarge electric arcs cannot be produced, the range of the electric arcs is reduced, and the problem of arc damage is effectively improved.

(2) Because the limiting nut used for limiting and preventing the joint ring from falling off is directly installed on the joint column, a split pin does not need to be specially designed, and the phenomenon that the split pin is broken in the prior art is eliminated.

(3) The movable contact group is hinged on the base through the rotating shaft, so that the sufficient strength of the node block is ensured, and the service life is prolonged.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention;

fig. 2 is a schematic front view of a first embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a second embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a movable contact group according to a second embodiment of the present invention;

fig. 5 is a schematic front view of a mating state of a stationary contact group and a movable contact group in the second embodiment of the present invention;

fig. 6 is a schematic top view of a mating state of a stationary contact group and a movable contact group in the second embodiment of the present invention.

Detailed Description

The moving and stationary contact group matching structure of the plaster checker according to the present invention will be described in detail with reference to the accompanying drawings and the embodiments.

The first embodiment is as follows:

as shown in fig. 1-2, the movable contact and stationary contact group matching structure of the contact detector of the present embodiment includes a base 11, two stationary contact groups 2 fixedly installed on the left and right sides of the base 11, and a movable contact group 4 installed in the middle of the base 11 and located between the two stationary contact groups 2, wherein the movable contact group 4 is hinged on the base 11 and can swing relative to the stationary contact groups 2 to selectively contact with one of the stationary contact groups 2, wherein each of the stationary contact groups 2 includes a stationary contact block 1 fixedly installed on the base 11 and three stationary contact blocks 5 respectively installed on and extending out of the stationary contact block through a support column 13, each of the stationary contact blocks 5 is composed of a pair of left and right stationary contact arms, as can be seen from fig. 1, the left and right stationary contact arms in each of the stationary contact blocks 5 are respectively installed on one support column 13, each of the left and right stationary contact arms has two independent upper and lower contact arms 6 (double wing structure), wherein each of the left and right contact arms 6 includes a reinforcing contact piece 14 and a reinforcing piece 15, and each of the left and right contact pieces 6 can increase the contact area through the design; each said movable contact group 4 includes the movable contact block 3 hinged on the base 11 through the spindle 12, stretch out of the movable contact block 3 top three separately by the contact post 7, the contact ring 8 that is fitted on the contact post and used for spacing the movable contact assembly 10 that the stop nut 9 that the contact ring carries on spacing anti-disengaging on the contact post, thus make the movable contact assembly 10 cooperate with stationary contact assembly 5 to realize and switch on or break off, adopt this structure, the stationary contact piece 14 of the double-wing structure is after the contact ring is hit into, the upper and lower two-layer stationary contact piece of the upper wing and lower wing are in the conducting state, through adopting the form of the upper and lower two-layer stationary contact piece, especially under the condition of frost or raining, even if certain layer stationary contact piece in certain group is influenced by frost and disengaged from contacting with the contact ring, another layer stationary contact piece and contact ring in this group are still in the conducting state, thus form the signal path double insurance; moreover, the arc discharge of the static contact and the contact ring is always in the moment of disconnection, then the electric corrosion is formed in the arc discharge area, the static contact piece is divided into an upper part and a lower part by the double-wing structure, after the upper wing is disconnected, the lower wing is still in a state of passage, at the moment, the upper wing cannot be subjected to arc discharge, when the lower wing is disconnected, electric sparks occur in the static contact group and the movable contact group, the electric corrosion is formed at the disconnection position of the static contact piece and the contact ring, so that the electric arc is usually concentrated in the lower wing area, and the upper wing and the lower wing are relatively independent, so that the influence of the electric arc on the upper wing can be reduced to the minimum, and the reliability of the whole contact is improved; in addition, when the movable contact ring is driven into the static contact piece, the static contact piece can have a cutting function on the static contact ring, if dirt and frost are on the static contact ring, the dirt and the frost can be removed through the cutting function, and the upper wing and the lower wing are separated in the design of the double-wing structure, so that the cleaning function of the piece is enhanced through twice cutting.

Further, the upper end of each contact column 7 is provided with a section of threaded section, the connection part of the threaded section and the contact column 7 forms a step, the limiting nut 9 can be limited on the step, so that the contact ring 8 can rotate freely, and of course, in order to ensure reliability, the threaded section can be sleeved with a gasket pressed between the limiting nut 9 and the step.

The second embodiment:

as shown in fig. 3 to 6, the movable and stationary contact group matching structure of the contact closure checker of the present embodiment is substantially the same as the structure of the first embodiment, and the difference is only in the arrangement of the stationary contact group 2 and the movable contact group 4, as shown in fig. 5 and 6, three stationary contact assemblies 5 are provided on the stationary contact blocks 1 of the two stationary contact groups 2, the left stationary contact arm and the right stationary contact arm of each stationary contact assembly 5 are respectively mounted on the two support columns 13 which are arranged in a staggered manner, and meanwhile, the movable contact group 4 includes two movable contact blocks 3 which are arranged in a staggered manner, wherein one movable contact block 3 is provided with one movable contact assembly 10, and the other movable contact block 3 is provided with one movable contact assembly 10, and the working principle thereof is substantially the same as that of the first embodiment.

Furthermore, the width of each static contact piece 14 is more than 5mm, in this embodiment, the effective contact width of a single wing is 9mm, the effective contact width of the double-wing structure of the JM2 type close-contact checker is 11mm, the effective contact area is increased by 22%, so that the contact stability is enhanced, and the double-insurance redundancy design of the double wings greatly reduces the virtual connection and the jump meter phenomenon caused by the passing vibration, and simultaneously, the contact area is increased, and the contact pressure is not changed. According to the pressure formula P (pressure) = F (pressure)/S (area), the pressure on the unit area becomes lower, thereby reducing the abrasion of the stationary contact piece and the contact ring.

Furthermore, formation that reinforcing piece and contact ring can block nickel formate from the root through passivation technology preparation, simultaneously, has increased two semicircular strengthening ribs in the latter half both sides of moving the contact piece as locking position, and first can improve the intensity of moving the contact piece, and the second, two strengthening ribs still can form self-align, the installation of being convenient for.

In addition, the original aluminum bronze (QAL 10-3-1.5) of the movable contact ring is changed into beryllium bronze (QBe2.0, state is TH 04), so the TH04 hard beryllium bronze is used as the contact ring material because the contact surface of the static contact piece and the contact ring is increased after the double-wing structure is changed, the rigidity and the reliability of the contact are improved, simultaneously, the disengaging force is increased along with the abrasion of the contact piece and the contact ring and the roughness is reduced, therefore, a new material with high hardness and abrasion resistance is required to be adopted, and the test also proves the point.

Claims

1. The utility model provides a close-fitting inspection ware moves quiet contact group cooperation structure, is including quiet contact group (2) that have quiet contact piece (1) and movable contact group (4) that have movable contact piece (3), movable contact group (4) can swing relative quiet contact group (2) and realize the contact or break away from its characterized in that: the static contact group (2) further comprises at least one static contact component (5) which is installed through a support column (13) and extends out of the static contact block, each static contact component (5) is composed of a pair of left static contact arms and right static contact arms, and each left static contact arm and each right static contact arm are provided with an upper wing part and a lower wing part (6) which are independent; the movable contact group (4) also comprises at least one movable contact component (10) which extends out of the top of the movable contact block (3) and consists of a contact column (7), a contact ring (8) sleeved on the contact column and a limit nut (9) which is arranged on the contact column and used for limiting and preventing the contact ring from falling off.

2. The movable contact and fixed contact group matching structure of the adherence inspection device according to claim 1, wherein: the upper end of each contact column (7) is provided with a section of threaded section, the threaded section and the connection part of the contact column (7) form a step, and the limiting nut (9) can be limited on the step so as to enable the contact ring (8) to rotate freely.

3. The movable contact and fixed contact group fitting structure of the contact checker according to claim 1 or 2, characterized in that: each wing part (6) comprises a static joint sheet (14) and a reinforcing sheet (15) matched with the static joint sheet (14).

4. The movable contact and fixed contact group fitting structure of the contact checker according to claim 3, wherein: the static contact group (2) is fixedly arranged on the base (11), and the movable contact group (4) is hinged on the base (11) through a rotating shaft (12).

5. The movable contact and fixed contact group fitting structure of the contact checker according to claim 4, wherein: each left static contact arm and each right static contact arm are respectively arranged on one supporting column (13).

6. The movable contact and fixed contact group matching structure of the adherence inspection device according to claim 2, wherein: the threaded section is sleeved with a gasket pressed between the limiting nut (9) and the step.

7. The movable contact and fixed contact group fitting structure of a contact checker according to claim 6, wherein: the contact ring (8) is made of beryllium bronze material.

8. The movable contact and fixed contact group fitting structure of the contact checker according to claim 7, wherein: and the lower half part of the movable contact block (3) is provided with a reinforcing rib.

9. The movable contact and fixed contact group fitting structure of the contact checker according to claim 3, wherein: the width of each static joint sheet (14) is more than 5 mm.