Non-contact contact group for point switch

Abstract

The invention provides a non-contact contact group for a switch machine, which realizes the non-wiring and non-contact effects in the switch machine, and comprises a static contact group, the static contact group comprises a signal acquisition piece installed in the switch machine, and a control unit and a wiring terminal which are installed in a magnetic shielding box outside the switch machine; the signal acquisition piece is connected with the control unit through a cable assembly so as to transmit a switching signal of the movable contact column to the control unit, and then the control unit connects or disconnects an electrical loop of the wiring terminal. The signal acquisition and control unit is physically isolated, particularly, wiring looseness caused by narrow installation space, high frequency and long-time vibration in a traditional switch machine is avoided, the wiring reliability is ensured, meanwhile, the defects existing in the switch machine due to looseness of a binding post and interference with other conductive parts are overcome, and the service life of the switch machine is prolonged. The working reliability is ensured, and the creepage or arc discharge phenomenon is avoided. The electromagnetic compatibility is good, the service life is long and the reliability is high.

Description

Technical Field

[0001] The invention belongs to the technical field of railway signals, and in particular relates to a contactless contact group for a switch machine. Background Art

[0002] A switch machine is an important signal infrastructure equipment used to reliably switch the switch position, change the direction of switch opening, lock the switch point rail, and respond to the switch position. It can well ensure driving safety, improve operating efficiency, and improve the labor intensity of drivers.

[0003] The device for connecting the identification signal in the switch machine is mainly a contact group composed of a moving contact group and a static contact group. Among them, when the moving contact ring or the moving contact column on the moving contact group is repeatedly and highly impacted into the left and right contact pieces of the static contact group (mainly two static contact pieces clamping a single moving contact column as a group, including the left contact piece and the right contact piece located on the left and right sides of the moving contact column when clamping a single moving contact column), it will cause a great mechanical impact to the left and right contact pieces, which will cause a long time During use, the elasticity and impact resistance of the static contact piece may decrease, or even break, resulting in unstable signal identification and causing major safety accidents. For this reason, it is necessary to enhance the mechanical elasticity and impact resistance of the static contact piece. Generally, this is done by selecting materials with better performance to make the static contact piece, or by adding mechanical structures such as reinforcement pieces and compression springs to the static contact piece, thereby enhancing the clamping force of the static contact piece during the process of being driven in or pulled out by the moving contact ring, and ensuring stable contact between the static contact piece and the moving contact ring or the moving contact column. Regardless of how it is designed, it is obvious that the entire design concept still uses the traditional mechanical structure design to achieve circuit switching, and it is impossible to fundamentally avoid the inherent faults in the mechanical structure, such as fatigue of mechanical components, arc discharge generated during the high-frequency switching between the moving contact column and the static contact piece, creepage in the terminal bolts, and other common faults that cannot be eliminated by relying on the current mainstream mechanical structure.

[0004] To this end, the Chinese invention patent with patent number 202222034711.3 provides a contactless switch and moving contact group for a switch machine, which mainly arranges a magnet on the moving contact column, and arranges a matching sensor module (magnetic induction switch or photoelectric induction switch) and a matching control board module on the static contact seat. The sensor module transmits the action signal of the moving contact column being inserted or pulled out to the control board module (integrated control circuit). The control board module realizes the function of connecting or disconnecting the circuit of the corresponding terminal by connecting and disconnecting its built-in relay or transistor. Although this technical solution overcomes the defects of the traditional mechanical matching structure and realizes the control of the control signal without contact, it still has the most obvious defect, that is, its sensor module, control panel module, terminal and its wiring are all integrated and assembled on the static contact seat, resulting in a large size of the entire static contact seat, and still cannot avoid the difficulties of traditional installation and maintenance methods. For example, if the machine needs to be shut down for operation, the switch box cover needs to be opened. The installation or maintenance process will inevitably interfere with other components in the switch box, posing a safety hazard. At the same time, it still cannot avoid the loosening of the terminal and its fixing components and electrical safety hazards (the space in the switch box is small, the wiring is numerous, and it is easy to cause short circuits of adjacent terminals due to environmental influences or operational errors). Summary of the invention

[0005] The purpose of the present invention is to overcome the problems of inconvenient installation and maintenance in the prior art.

[0006] To achieve the above object, the present invention provides a technical solution: a contactless contact group for a switch machine, including a static contact group, which is special in that the static contact group includes a signal collection component installed in the switch machine, a control unit installed outside the switch machine, and a wiring terminal;

[0007] The signal acquisition component is connected to the control unit through a cable assembly to transmit the switch signal of the moving contact column to the control unit, and the control unit then connects or disconnects the electrical circuit of the terminal.

[0008] Furthermore, the signal collection member includes a fixing portion and a plurality of comb teeth fixed to the front side of the fixing portion and arranged in sequence along the axial direction;

[0009] At least one first sensor module is arranged in each comb-tooth portion, which is used to collect switch signals when the moving contact column is driven into or pulled out of adjacent comb-tooth portions, and transmit the signals to the control unit.

[0010] Further, the control unit includes at least one control board module group;

[0011] The wiring terminal includes more than two wiring post groups;

[0012] The control panel module group includes a first control panel module group, which is formed by axially arranging more than two first control panel modules in sequence;

[0013] Each first control board module receives a switch signal of a moving contact post collected by the first sensor module to connect or disconnect the electrical circuit of the first terminal group matched with the first control board module;

[0014] The first terminal group includes adjacent first terminals and second terminals.

[0015] Furthermore, a second sensor module is also disposed in each comb tooth portion;

[0016] The control panel module group includes a second control panel module group, which is composed of more than two second control panel modules arranged in sequence axially;

[0017] Each second control board module receives a switch signal of a moving contact post collected by the second sensor module to connect or disconnect the electrical circuit of the second terminal group matched with the second control board module;

[0018] The second binding post group includes adjacent third binding posts and fourth binding posts.

[0019] Furthermore, the first sensor module and the second sensor module are arranged sequentially along the length direction of the comb-tooth portion.

[0020] Further, the first control board module group and the first terminal group are fixed to one side of the mounting member;

[0021] The second control board module group and the second terminal group are fixed on the other side of the mounting member;

[0022] The first control board module group and the second control board module group are both installed in the top surface installation groove of the installation member;

[0023] The first terminal post group and the second terminal post group are both fixed outside the top surface mounting groove.

[0024] Furthermore, a top cover is provided on the top of the top surface mounting cavity, and stud holes for mounting the first terminal group and the second terminal group are provided on the top cover.

[0025] Furthermore, the first sensor module and the second sensor module are both magnetic induction switch modules, and an induction magnet is respectively arranged on the left and right side walls of the movable contact column, or an induction magnetic ring is arranged on the movable contact column.

[0026] Furthermore, the first sensor module and the second sensor module are both composed of light emitting elements and photosensitive elements respectively arranged on two opposite side walls of adjacent comb teeth, and the movable contact column is used to block or avoid the light path, thereby completing the switching action of the switch signal.

[0027] The beneficial effects of the present invention are: the signal acquisition and circuit control are physically isolated, that is, the signal acquisition component and the wiring control component are installed inside and outside the switch machine respectively, and the physical installation and subsequent maintenance do not affect each other, especially avoiding the loose wiring caused by the narrow space, high frequency, and long-term vibration in the traditional switch machine, ensuring the reliability of the wiring, and at the same time overcoming the defects of the switch machine due to the loose terminal and the interference with other conductive parts, ensuring the working reliability, and avoiding creepage or arcing. Long life and high reliability.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the static contact group.

[0030] Figure 2 This is a diagram showing the state when the moving contact post is driven into the adjacent comb teeth.

[0031] Figure 3 It is a three-dimensional diagram of the moving contact group.

[0032] Figure 4 This is a schematic diagram of the wiring control components.

[0033] Figure 5 This is a schematic diagram of the signal acquisition component.

[0034] Figure 6 It is a schematic diagram of the arrangement of the photosensitive element and the light-emitting element on the signal acquisition component.

[0035] Figure 7 It is the block diagram of the signal acquisition control circuit.

[0036] In the figure: 1. fixing part; 2. comb-tooth part; 3. first sensor module; 4. mounting part; 5. top surface mounting groove; 6. first control board module; 7. first terminal; 8. second terminal; 9. comb-tooth part between ends; 10. second control board module; 11. moving contact post; 12. top cover; 13. stud hole; 14. induction magnet; 15. light-emitting element; 16. photosensitive element; 17. second terminal group; 18. aviation plug mounting hole of mounting part; 19. screw fixing side ear of mounting part; 20. aviation plug mounting hole of fixing part; 21. stud mounting hole; 22. second sensor module; 23. third terminal group; 24. fourth terminal group. DETAILED DESCRIPTION

[0037] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlap", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] The contactless contact group for a switch machine provided in this embodiment includes a static contact group, which is installed in a signal acquisition component inside the switch machine, a control unit installed outside the switch machine, and a wiring terminal; wherein the signal acquisition component is connected to the control unit through a cable assembly to transmit the switch signal of the moving contact column 11 to the control unit, and the control unit then connects or disconnects the electrical circuit of the wiring terminal.

[0042] Specifically, the signal acquisition components include Figure 1 The fixing part 1 shown in the figure (the fixing part 1 is fixed to the mounting seat or mounting position of the static contact group in the switch machine by installing screws or studs) and a plurality of comb teeth 2 fixed to the front side of the fixing part 1 and arranged in sequence along the axial direction (in actual application, 2 or 3 comb teeth 2 are mostly used); at least one first sensor module 3 is arranged in the comb teeth 2 to collect Figure 2 The movable contact post 11 shown drives in or out a switch signal between adjacent comb teeth 2 and transmits it to the control unit.

[0043] The control unit includes at least one control board module group; the matching wiring terminals include more than two wiring post groups; Figure 1As shown, the control panel module group includes a first control panel module group, which is composed of more than two first control panel modules 6 arranged axially in sequence; each first control panel module 6 receives a switch signal of a moving contact post 11 collected by a first sensor module 3 to connect or disconnect the electrical circuit of a first terminal group matching the first control panel module 6; the first terminal group includes adjacent first terminals 7 and second terminals 8, which are the same as the setting method of the terminals on the traditional static contact group, that is, a plurality of terminals are installed axially in sequence on the contact seat of the static contact group, that is, the mounting member 4 in this embodiment (generally, studs are selected, and the studs are fixed to the mounting member 4 by nuts and gaskets).

[0044] Depend on Figure 1 It can also be seen that a second sensor module 22 is also provided in each comb tooth portion 2, which is arranged sequentially with the first sensor module 3 along the length direction of the comb tooth portion 2, that is, arranged sequentially in a direction perpendicular to the axial direction of the fixed portion 1, thereby reducing the length of the comb tooth portion 2. In particular, the two do not interfere with each other front and back, forming a redundant design, providing mutual insurance, and ensuring safe operation.

[0045] The second sensor module 22 is matched with the second control board module group included in the control board module group, which consists of Figure 1 The two or more second control board modules 10 shown are arranged axially in sequence; each second control board module 10 receives a switch signal of a moving contact post 11 collected by a second sensor module 22 to connect or disconnect the electrical circuit of the second terminal group 17 matched with the second control board module 10;

[0046] The second terminal group 17 includes a third terminal 23 and a fourth terminal 24 which are adjacent to each other.

[0047] In order to facilitate installation, the first control board module group and the first terminal group provided in this embodiment are fixed on one side of the mounting member 4 (which may also be referred to as a bottom shell or a bearing member in practice, mainly realizing a fixed connection with the mounting seat and bearing electrical and mechanical components such as a control circuit board or a circuit module and a terminal, and in order to avoid interference, in practice, the mounting member is fixed in a magnetic shielding box outside the switch machine);

[0048] The second control panel module group and the second terminal group are fixed on the other side of the mounting member 4; and the first control panel module group (refer to the first control panel module 6) and the second control panel module group (refer to the second control panel module 10) are both installed in the top surface mounting groove 5 of the mounting member 4; and the first terminal group (refer to the first terminal 7 and the second terminal 8) and the second terminal group 17 are both fixed outside the top surface mounting groove 5. That is, the two groups of control panel module groups are opposite, respectively arranged on both sides of the mounting member 4, do not interfere with each other, are convenient for installation and maintenance, and constitute a 1+1 redundant design, which is mutually insured and improves the safety and reliability of operation.

[0049] The first sensor module 3 is electrically connected to the first control board module 6 through a conductive cable assembly (it is recommended to use an aviation plug and a matching cable as a signal acquisition and transmission, and a conductive cable assembly with excellent anti-interference and waterproof properties) to transmit the collected Figure 2 The action switch signal of the moving contact post 11 driven into or pulled out of the adjacent comb teeth is transmitted to the first control board module 6. That is, the moving contact post 11 drives into or pulls out the adjacent comb teeth 2, cooperates with the first sensor module 3, and realizes the transmission of the action switch signal of the moving contact post 11 to the first control board module 6, and the first control board module 6 controls the connection or disconnection of the circuit of the first terminal 7 and the second terminal 8 connected thereto according to the switch signal.

[0050] As described above, the coupling scheme without mechanical contact provided in this embodiment, the first sensor module 3 (the second sensor module 22) mainly includes a magnetic induction module and a photoelectric induction module, wherein the magnetic induction contact technology is different from the traditional contact technology, which is mainly reflected in that the friction, collision and contact between the moving and static contacts are avoided during the action of the contact. A specific magnet is fixed on the induction contact of the moving contact column 11. When the moving contact column 11 is driven into the induction area of ​​the static contact, that is, between the adjacent comb teeth 2, the magnetic field in the area changes. At this time, the magnetic induction sensor module embedded in the comb teeth 2 senses the change in the magnetic field and converts it into an electrical signal and transmits it to the first control board module 6. The first control board module 6 processes and logically judges the transmitted electrical signal, and reliably drives the built-in relay or transistor of the first control board module 6. By connecting and disconnecting the built-in relay or transistor, the function of connecting or disconnecting the corresponding terminal circuit is realized, that is, the electrical circuit of the first terminal 7 and the second terminal 8 of the first terminal group is realized, and the transmission of the action signal of the moving contact column 11 is completed, thereby realizing the on and off of the railway turnout control circuit.

[0051] When the first sensor module 3 (second sensor module 22) adopts photoelectric sensing technology, the two opposite side walls of the static contact sensing groove, i.e., the adjacent comb teeth 2 mentioned above, are respectively equipped with light-emitting elements and photosensitive elements that have been maturely applied. When the moving contact column 11 is driven into the sensing area between the adjacent comb teeth 2, the light is blocked and cut off. When the photosensitive element senses the light change, it converts the optical signal into an electrical signal and transmits it to the first control board module 6. The first control board module 6 processes and performs logical judgment on the transmitted electrical signal, and enables it to reliably drive the built-in relay or transistor. By connecting and disconnecting the built-in relay or transistor, the electrical connection and disconnection between the corresponding two terminals is realized, such as connecting or disconnecting the electrical circuit of the first terminal 7 and the second terminal 8 of the first terminal group, completing the transmission of the action signal of the moving contact column 11, and then realizing the connection and disconnection of the railway turnout control circuit. These two technologies are already common technologies in this field. Commonly used circuits such as Figure 7 As shown, it is well known to technicians with this skill and will not be described in detail here. It is only necessary to select specific appropriate electronic components and electronic circuits based on industry standards when manufacturing the static contact group provided in this embodiment.

[0052] Based on the above description, it is not difficult to find that in practical application, at least three comb teeth 2 are provided, located at two ends (i.e. Figure 1 A sensor module 3 is respectively arranged in the left and right side walls of the inter-end comb-tooth portion 9 (i.e., the comb-tooth portion located between the left and right ends in the axial direction, referred to as the inter-end comb-tooth portion) to match the moving contact post 11 driven in or pulled out from the interval of the adjacent comb-tooth portion 2, so as to realize the collection of the action switch signal of the moving contact post 11. Of course, there are at least three first control board modules 6 in the mounting portion 4 of the matching wiring control component, and at least three corresponding first terminal groups (i.e., each first control board module 6 cooperates with a first terminal group to realize the on and off of the electrical connection between the two terminals in the first terminal group).

[0053] To facilitate a better understanding, in this embodiment, only the settings of the first control board module 6 and the second control board module 10 are explained: the first control board module 6 and the first terminal group are both arranged on one side of the top surface mounting groove 5 and arranged axially. At the same time, a plurality of second control board modules 10 arranged axially are arranged on the other side of the top surface mounting cavity 5. The mounting member 4 is provided with a plurality of second terminal groups 17 arranged axially and matched one by one with the second control board module 10 on the other side of the top surface mounting groove 5. The second control board module 10 and its matching second terminal group 17 constitute a backup control circuit to improve the reliability of the control circuit, that is, this embodiment adopts a 1+1 redundancy solution. Of course, a corresponding second sensor module 22 is provided in the comb tooth portion 2 to match the second control board module 10 for signal acquisition.

[0054] Finally, by Figure 4 It can be seen that a top cover 12 is provided on the top of the top surface mounting groove 5, and a first terminal group and a second terminal group are installed on the top cover 12. Figure 4 The stud holes 13 are shown for mounting the first terminal post 7 , the second terminal post 8 , the third terminal post 23 and the fourth terminal post 24 .

[0055] When the first sensor module 3 and the second sensor module 22 are magnetic induction switch modules, a magnetic induction switch module is provided on the left and right side walls of the movable contact column 11. Figure 2 The induction magnet 14 or the moving contact post 11 shown is provided with an induction magnetic coil.

[0056] When the first sensor module 3 and the second sensor module 22 are photoelectric sensing modules, they are respectively arranged Figure 6 The light emitting element 15 and the light sensing element 16 on two opposite side walls of the adjacent comb teeth 2 are shown, and the moving contact post 11 is used to block or avoid the light path, thereby completing the switching action of the switching signal.

[0057] In summary, it is not difficult to see that the static contact group provided in the above embodiments, when in use, has its signal acquisition component installed in the switch machine, which greatly reduces the installation space, and only the signal acquisition component is installed in the switch machine, and the control unit and the wiring terminal used in conjunction with it are installed in a magnetic shielding installation box or installation box outside the switch machine, thereby achieving physical isolation from the switch machine and avoiding the defect of loose wiring on the wiring posts of the traditional contact group installed in the switch machine due to high-frequency and long-term vibration, thereby ensuring the stability of the wiring. At the same time, during installation and subsequent maintenance, it can be carried out separately without affecting the switch machine, especially not being restricted by the adverse limitations of the narrow space of the switch machine, thereby greatly improving the convenience of installation and subsequent maintenance.

[0058] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A contactless contact group for a switch machine, comprising a static contact group, characterized in that: The static contact group includes a signal collection component installed in the switch machine, a control unit installed outside the switch machine, and a connection terminal; The signal acquisition component is connected to the control unit via a cable assembly to transmit the switch signal of the moving contact column (11) to the control unit, and the control unit then connects or disconnects the electrical circuit of the connection terminal.

2. The contactless contact assembly for a switch machine according to claim 1, characterized in that: The signal collection component comprises a fixing portion (1) and a plurality of comb teeth portions (2) fixed to the front side of the fixing portion (1) and arranged in sequence along the axial direction; At least one first sensor module (3) is arranged in each comb tooth portion (2) for collecting switch signals when the moving contact column (11) is driven in or out between adjacent comb tooth portions (2) and transmitting the signals to the control unit.

3. The contactless contact assembly for a switch machine according to claim 2, characterized in that: The control unit includes at least one control board module group; The wiring terminal includes more than two wiring post groups; The control panel module group comprises a first control panel module group, which is formed by axially arranging more than two first control panel modules (6) in sequence; Each first control board module (6) receives a switch signal of a moving contact post (11) collected by the first sensor module (3) to connect or disconnect an electrical circuit of a first terminal group matched with the first control board module (6); The first terminal group comprises adjacent first terminals (7) and second terminals (8).

4. The contactless contact assembly for a switch machine according to claim 3, characterized in that: A second sensor module (22) is also arranged in each comb tooth portion (2); The control panel module group comprises a second control panel module group, which is formed by two or more second control panel modules (10) arranged in sequence axially; Each second control board module (10) receives a switch signal of a moving contact post (11) collected by the second sensor module (22) to connect or disconnect an electrical circuit of a second terminal group matched with the second control board module (10); The second terminal group includes adjacent third terminals (23) and fourth terminals (24).

5. The contactless contact assembly for a switch machine according to claim 3, characterized in that: The first sensor module (3) and the second sensor module (22) are arranged in sequence along the length direction of the comb tooth portion (2).

6. The contactless contact assembly for a switch machine according to claim 4 or 5, characterized in that: The first control panel module group and the first terminal group are fixed on one side of the mounting member (4); The second control panel module group and the second terminal group are fixed on the other side of the mounting member (4); The first control board module group and the second control board module group are both installed in a top surface installation groove (5) of the installation member (4); The first terminal post group and the second terminal post group are both fixed outside the top surface mounting groove (5).

7. The contactless contact assembly for a switch machine according to claim 6, characterized in that: A top cover (12) is provided on the top of the top surface installation cavity (5), and a stud hole (13) for installing the first terminal group and the second terminal group is provided on the top cover (12).

8. The contactless contact assembly for a switch machine according to claim 4 or 5, characterized in that: The first sensor module (3) and the second sensor module (22) are both magnetic induction switch modules, and an induction magnet (14) is respectively arranged on the left and right side walls of the movable contact column (11), or an induction magnetic ring is arranged on the movable contact column (11).

9. The contactless contact assembly for a switch machine according to claim 4 or 5, characterized in that: The first sensor module (3) and the second sensor module (22) are both composed of a light emitting element (15) and a light sensing element (16) respectively arranged on two opposite side walls of adjacent comb teeth (2), and the movable contact column (11) is used to block or avoid the light path, thereby completing the switching action of the switch signal.

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