Redundant contact group

Abstract

The utility model provides a redundant contact group, which comprises a movable contact group consisting of a movable contact seat, a vertical column vertically fixed on the top surface of the movable contact seat, at least two movable contact rings sleeved on the vertical column, and a locking nut or a spigot pin fixed at the top end of the vertical column and used for limiting the movable contact rings, comprising a lower contact ring and an upper contact ring. By arranging the two moving contact rings which are arranged up and down, the two moving contact rings can be well matched with the redundant static contact sheets in a one-to-one correspondence manner to form two sets of independent contact groups which are independently used and do not interfere with each other, so that the phenomenon that the upper and lower static contact sheets interfere with the single moving contact ring in the prior art is effectively avoided; therefore, the fault of a single layer of static contact sheet does not affect the safe operation of another layer of static contact sheet, and the use reliability and safety of the contact group are improved. The drawing force of the static contact piece is reduced, the abrasion of the static contact piece is weakened, the service life is prolonged, and the operation and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the rail transit technical field, concretely relates to a redundancy contact group. BACKGROUND

[0002] The existing contact group is mainly composed of static contact group and dynamic contact group, and belongs to the most important contact assembly in the switch machine. In order to overcome the adverse effects of rain, snow and frost, people have developed a redundancy static contact group with upper and lower static contact pieces, such as Chinese utility model patent 201920546587.4 and 202322330871.7, which are about the design of the redundancy static contact group. Through the double-layer design, the contact area of the static contact piece and the dynamic contact ring is increased, and double insurance is realized. However, the dynamic contact group matched with it still adopts the common structure. In practice, when one layer of static contact piece fails to work stably, that is, when a fault occurs, it will still have intermittent contact with the dynamic contact ring, which will interfere with the work of the static contact piece of the other layer working normally. Specifically, abnormal contact between the abnormal static contact piece and the dynamic contact ring will cause disturbance, causing the dynamic contact ring to rotate to deviate, that is, to sway rotation, which is not a stable rotation around the shaft. Instead, it will increase the failure of such abnormal contact, especially the occurrence of electric arc, which is very serious and absolutely not allowed. Moreover, in practice, only one dynamic contact ring cooperates with the static contact pieces on the upper and lower sides, which will result in a large resistance when the static contact piece and the dynamic contact ring are punched in or pulled out, requiring a large pulling force. More importantly, it will increase the wear of the static contact piece, shorten its service life, and increase the maintenance and use cost. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the problems of unstable operation and unreliability caused by the redundancy design of the static contact group in the existing contact group (including the dynamic contact group and the static contact group), and reducing the pulling force, reducing the wear and prolonging the service life.

[0004] To achieve the above purpose, the utility model provides a redundancy contact group, which comprises a dynamic contact group, the dynamic contact group is composed of a dynamic contact seat, a vertical column fixed on the top surface of the dynamic contact seat, a dynamic contact ring sleeved on the vertical column and a locking nut or a stop pin fixed on the top end of the vertical column to limit the dynamic contact ring, and the special part is that the dynamic contact ring is at least two, including a lower contact ring and an upper contact ring.

[0005] The utility model discloses a beneficial effect is: through setting up two upper and lower installation's dynamic contact ring, can very good and the corresponding cooperation of redundancy static contact piece one, suitable, constitute two sets of independent contact group, each other single use, do not interfere with each other, effectively put an end to the interference phenomenon of upper and lower static contact piece and single dynamic contact ring of prior art, can ensure that single layer static contact piece failure does not influence the safe operation of another layer static contact piece, has promoted the reliability and security of the use of contact group. Reduce the pulling force of static contact piece, weaken the wear and tear of static contact piece, prolong the service life, reduce the operation and maintenance cost.

[0006] The utility model will make further detailed description in combination with the drawings. DRAWINGS

[0007] Figure 1 It is the structural diagram of prior dynamic contact group.

[0008] Figure 2 It is the half cut structure diagram of prior dynamic contact group.

[0009] Figure 3 It is the schematic diagram of the top end installation stop mouth pin of the column of prior dynamic contact group.

[0010] Figure 4 It is the structure schematic diagram of dynamic contact group with upper and lower dynamic contact ring.

[0011] Figure 5 It is the half cut view of Figure 4 .

[0012] Figure 6 It is the schematic diagram of setting up the partition ring.

[0013] Figure 7 It is the schematic diagram of eccentric compensation isolation cylinder dynamic contact group.

[0014] Figure 8 It is the setting schematic diagram of eccentric compensation isolation cylinder.

[0015] Figure 9 It is the setting schematic diagram of the thread part of column.

[0016] Figure 10 It is the schematic diagram of another eccentric compensation isolation cylinder.

[0017] Figure 11 It is the schematic diagram of redundancy static contact group.

[0018] Explanation of reference numerals in the attached drawings: 1. Moving contact seat; 2. Column; 3. Moving contact ring; 4. Locking nut or stop pin; 5. Lower contact ring; 6. Upper contact ring; 7. Separator ring; 8. Eccentric compensation isolation cylinder; 9. Cylinder body; 10. Annular retaining ring; 11. Threaded part; 12. Top end part; 13. Bottom end part; 14. Middle section; 15. Stationary contact seat; 16. Terminal post; 17. Upper contact plate; 18. Lower contact plate. Detailed Implementation

[0019] To further illustrate the technical means and effects of this utility model in achieving its intended purpose, the following detailed description of the specific implementation methods, structural features, and effects of this utility model is provided in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1 , 2 Figure 3 shows a redundant contact group provided in this embodiment, including a moving contact group. This moving contact group consists of a moving contact seat 1, a column 2 vertically fixed to the top surface of the moving contact seat 1, a moving contact ring 3 fitted onto the column 2, and a locking nut or stop pin 4 fixed to the top of the column 2 to restrict the moving contact ring 3. To overcome the unreliability and insecurity of existing contact groups, this embodiment specifically sets two moving contact rings 3, including... Figure 4 , 5 The lower contact ring 5 and the upper contact ring 6 are shown in 6 or 7. In this way, the following is achieved: Figure 8 Each static contact piece shown is paired with either the lower contact ring 5 or the upper contact ring 6 of the same layer (the upper static contact piece is matched with the upper contact ring, and the lower static contact piece is matched with the lower contact ring). If a static contact piece in a certain layer fails, such as due to positional displacement or loosening of the clamp, the matched moving contact ring (lower contact ring 5 or upper contact ring 6) is unique and forms its own system. It does not interfere with the pairing of independently operating moving contact rings and static contact pieces. Therefore, the interference phenomenon caused by multiple static contact pieces matching the same moving contact ring, which exists in the prior art, will not occur. Moreover, the contact surface between the moving contact ring and the corresponding static contact piece is always a large area of ​​surface contact, effectively avoiding line or point contact caused by interference, thus preventing electric arcing and greatly ensuring operational safety. Meanwhile, each layer of stationary contact plates is used in conjunction with the moving contact ring of the same layer. Tests have shown that this greatly reduces the pull-out force of the stationary contact plates, which helps to reduce wear on the stationary contact plates and also reduces mechanical wear on equipment related to the pull-out action, thus significantly reducing maintenance costs.

[0021] To further ensure that the upper and lower moving and stationary groups (moving contact rings on the same layer matching stationary contact pieces on the same layer) operate independently, this embodiment provides a connection between the lower contact ring 5 and the upper contact ring 6. Figure 6The dividing ring 7 shown increases the spacing between the upper and lower moving contact rings, achieving physical isolation and preventing direct contact and mutual interference.

[0022] Similarly, this embodiment provides Figure 7 , 8 The physical isolation and stabilization structure shown in Figure 9 specifically involves an eccentric compensation isolation cylinder 8 installed on column 2 (ensuring coaxial installation; specifically, this involves adding coaxial components and increasing the coaxial contact surface to achieve eccentric compensation, i.e., enhancing coaxiality. In this embodiment, the coaxial constraint on the upper and lower ends of the moving contact ring is achieved through the column itself and the eccentric compensation isolation cylinder 8). The eccentric compensation isolation cylinder 8 and... Figure 9 The threaded part 11 of the column 2 shown is threaded.

[0023] Eccentric compensation isolation cylinder 8 Figure 8 The cylinder 9 shown is threadedly connected to the column 2, and an annular retaining ring 10 surrounds the circumferential sidewall of the cylinder 9. The top end 12 and bottom end 13 of the cylinder 9 are both... Figure 10 The axially symmetrical frustum shown has a cylindrical middle section 14. An annular retaining ring 10 is positioned at the axial center line of the middle section 14. The bottom cavity of the lower contact ring 5 and the top cavity of the upper contact ring 6 are channels adapted to the frustum, respectively fitted onto the top end 12 and the bottom end 13. This eccentrically compensated isolation cylinder 8 effectively achieves physical isolation between the lower contact ring 5 and the upper contact ring 6, while ensuring their coaxiality during installation, thus improving their operational stability and reliability.

[0024] In both of the above embodiments, whether it is the partition ring 7 or the eccentric compensation isolation cylinder 8, the purpose is to achieve physical isolation between the lower contact ring 5 and the upper contact ring 6, avoid mutual interference, ensure the maximum area or the maximum chance of contact with the matching static contact piece of the same layer, and avoid arcing caused by skewed line contact or even point contact with the static contact piece of the upper or lower layer, thus ensuring operational safety.

[0025] Of course, ensuring the effectiveness of the above embodiments requires Figure 11 The redundant stationary contact assembly shown has an upper contact piece 17 and a lower contact piece 18 stacked in the height direction of the mounting groove on its stationary contact base 15, for use in conjunction with the lower contact ring 5 and the upper contact ring 5, respectively.

[0026] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention; however, it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention; all such deductions or substitutions should be considered to fall within the protection scope of the present invention.

Claims

1. A redundant contact group comprising a moving contact group, which is composed of a moving contact seat (1), a vertical post (2) fixed on the top surface of the moving contact seat (1), a moving contact ring (3) sleeved on the vertical post (2), and a locking nut or a stop pin (4) fixed on the top end of the vertical post (2) to limit the moving contact ring (3), characterized in that: The movable contact point ring (3) is at least two, including the lower contact point ring (5) and the upper contact point ring (6).

2. The redundant contact set of claim 1, wherein: The lower contact point ring (5) and the upper contact point ring (6) are provided with a partition ring (7) therebetween.

3. The redundant contact set of claim 1, wherein: The post (2) is provided with an eccentric compensation isolation cylinder (8) which is threadedly connected with the threaded part (11) of the post (2).

4. The redundant contact set of claim 3, wherein: The eccentric compensation isolation cylinder (8) is composed of a cylinder body (9) which is threadedly connected with the post (2) and an annular retainer ring (10) which is circumferentially arranged on the side wall of the cylinder body (9).

5. The redundant contact set of claim 4, wherein: The top end part (12) and the bottom end part (13) of the cylinder body (9) are both axisymmetric circular truncated cones, and the middle section (14) is a cylinder; the annular retainer ring (10) is arranged at the axial center position line of the middle section (14); The bottom section hole cavity of the lower contact point ring (5) and the top section hole cavity of the upper contact point ring (6) are hole passages which are adapted to the circular truncated cones, so as to be respectively sleeved on the top end part (12) and the bottom end part (13).

6. The redundant contact set of claim 1 or 2 or 3 or 4, wherein: It also includes a redundant static contact point group which has an upper contact point sheet (17) and a lower contact point sheet (18) which are stacked in the height direction of the mounting groove, so as to be respectively matched with the lower contact point ring (5) and the upper contact point ring (6).

Images