An integrated sealed contact assembly for railways

Abstract

The invention discloses an integrated sealed contact group for railway, comprising a bottom shell, an upper shell, a central swing body, a static point unit, a moving contact, a drive block, an insulating protective cover and a terminal. The integrated sealed contact group for railway is a sealed and insulated integrated contact unit, the original installation and external dimensions are almost unchanged, and it can be completely interchangeable with existing contacts, the function is greatly upgraded, and no adjustment is required during installation and use, which is simple and fast; electrical contact redundancy technology, reciprocating linear motion technology, concave-convex nested physical isolation technology, integrated sealing technology and interchangeability technology are adopted; optical axis, bearing and rolling technology are adopted in many places, so that the contact group has low wear during use, flexible movement and rotation, no card group, reliable electrical action, long life, no trouble, and maintenance-free, and has met the highest requirements of the railway company for the contact group after various tests, and the electrical performance is reliable, stable and safe.

Description

Technical Field

[0001] The invention relates to an integrated sealed contact group for railways, belonging to the technical field of railway turnout machines. Background Art

[0002] The contact group currently produced and used was designed in the 1970s, adapted to the planned economy era with little population mobility and little material transportation. With the economic reform, the flow of talents, tourism development, material circulation, and international trade development have put great pressure on railway transportation, which has not been able to meet the development of the national economy. Since April 1997, the railway has carried out 6 consecutive speed increases, but passenger transportation still cannot meet the demand; in 2008, the high-speed railway has a certain scale, and in 2015, the high-speed railway has entered a new journey, with advanced scale and strengthened management, and higher requirements for equipment. The original contact products are no longer suitable for high-speed railway transportation production, and zero failure and maintenance-free requirements have been put forward. The existing contacts cannot overcome the design defects. Although a lot of effort has been put into materials, production and processing, and quality control, various failures still occur, resulting in missing or errors in representation, affecting the time for trains to enter and exit the station, reducing the efficiency of railway transportation, and causing huge losses in railway transportation. The contact assembly products currently in use have a simple structure, an open type dispersed structure, and the moving contacts and static contacts are installed and used in combination. According to statistics, common faults include ring falling out, split pin breakage, point contact, poor contact, contact piece bias to one side, short circuit, contact piece contamination, low insulation resistance, low electrical life, etc. These faults are difficult to completely eliminate, and the root cause lies in the design. According to relevant technical standards, in TB / 1477-2005 "ZD6 Series Electric Switch Machine", the 4.18 switch machine has a reliable service life of 300,000 times. In order to adapt to high-speed rail operations, the new national standard GB / T 25338[1].1-2010 was implemented in March 2011. The number of actions of the 5.10.1 switch machine test life is divided into two levels: 300,000 times and 1 million times, and the 1 million times level is added. According to statistics, the existing contacts cannot complete 1 million times of normal on-site use. The equipment has been running with problems for a long time. The maintenance task of the electrical section is very large, and rescue repairs are often carried out, which requires a lot of manpower and financial resources. The most harmful thing is that it affects the normal operation of the train. The reason is that although the contacts are installed inside the switch machine, the switch machine equipment is an outdoor equipment after all. It is subject to high temperature, high humidity, severe cold coastal climate conditions and air pollution, which naturally causes the surface deterioration of the contacts, increased contact resistance, reduced insulation, etc. In addition, unintentional human damage cannot be completely eliminated, which is the fatal defect of the open contact. From the above situation, it can be seen that the technical solution of the existing contacts can no longer meet the needs of high-speed railway passenger cars and subway operations, and the improvement plan cannot fundamentally solve the major problems existing in the original design. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the design defects of existing products, provide an integrated sealed contact group for railways, and solve the problems existing in the prior art. Only by combining two static and one dynamic products into an integral product can the physical sealing technology be adopted. In terms of design concept, the advantages of the existing contact products in use, such as sweeping range, rotation of the moving point, large-area line contact, large starting and passing current, large disconnection distance, and rapid disconnection, are maintained, and the original external dimensions and installation dimensions are adopted to ensure complete interchangeability with existing contacts. Obvious advantages such as complete line contact, contact redundancy, good rotation of the moving point, low wear, and long life are achieved. At the same time, the influence of the harsh conditions of the outdoor environment is overcome, and common faults such as the fall-out of the retaining ring, the breakage of the cotter pin, point contact, poor contact, the contact piece deviating to one side, short circuit, contact piece contamination, low insulation resistance, low electrical life, etc., which are difficult to completely eliminate, are solved.

[0004] In order to solve the above-mentioned product defects and realize a new technical method, the present invention provides the following technical solutions:

[0005] The present invention discloses an integrated sealed contact group for railway, comprising a bottom shell, an upper shell, a central swing body, a static point unit, a moving contact, a driving block, an insulating protective cover and a terminal. The bottom shell and the upper shell are fixed as a whole by fixing bolts, and the contact group is installed on the base of an automatic switch by installing bolts. The upper shell is arranged above the bottom shell, and the upper shell is fixedly connected to the bottom shell by fixing bolts. Six terminals are symmetrically arranged at both ends of the top of the upper shell, and a static point upper piece and a static point lower piece are arranged below the terminal. The static point upper piece and the static point lower piece are combined into a static point unit. The static point unit is located on both sides of the moving point optical axis. The static point unit is provided with a static point right unit and a static point left unit. The static point right unit and the static point left unit group The central swing body is arranged inside the bottom shell, and the central swing body is composed of a moving point optical axis, a roller, a moving point, a swing lower block, a swing upper block and a roller shaft. The moving point optical axis is arranged inside the bottom shell, and three moving point optical axes are arranged at equal intervals. Moving points are arranged at both ends of the three moving point optical axes. An upper swing block is arranged above the moving point optical axis, and a lower swing block is arranged below the moving point optical axis. A roller shaft is arranged at the bottom of the swing lower block, and a roller is arranged on the axis of the roller shaft. The roller and the driving block are in an active connection state when the switch is in action. The driving block is independent of the contact group and is mounted on the automatic switch bracket by an M6 bolt.

[0006] As a preferred technical solution of the present invention, the moving point optical axis and the bottom shell are supported by guide blocks arranged on two middle partitions, and the guide blocks are equipped with sealing rings. The moving point optical axis can move on two symmetrical guide blocks.

[0007] As a preferred technical solution of the present invention, the moving contact adopts a solid cylindrical dumbbell structure and is installed at both ends of the moving point optical axis. When in action, it forms a contact switch combination with the static point right unit and the static point left unit, forming a total of six groups of moving point and static point combinations, which are closed in a line contact manner.

[0008] As a preferred technical solution of the present invention, a protrusion or groove-shaped physical isolation is added between the adjacent static point right unit and static point left unit to increase the electrical creepage distance.

[0009] As a preferred technical solution of the present invention, an insulating protective cover is provided outside the terminal of the binding post.

[0010] As a preferred technical solution of the present invention, the connecting parts of the upper shell and the bottom shell are provided with concave-convex grooves, the inner partition connecting the guide block and the bottom shell is also provided with concave-convex grooves, and a sealing ring is provided between the guide block and the moving point optical axis. The upper and lower shells are fixedly connected by fixing bolts, and insulating sealant is provided on the edges and in the grooves to form an integrated sealed contact group.

[0011] The beneficial effects achieved by the present invention are as follows: the integrated sealed contact group for railways of the present invention is a sealed and insulated integrated contact unit, the original installation and external dimensions are almost unchanged, it can be completely interchangeable with existing contacts, the functions are greatly upgraded, no adjustment is required during installation, and it is simple, convenient and fast; it adopts electric contact redundancy technology, reciprocating linear motion technology, concave-convex physical nesting isolation technology, integrated sealing technology and interchangeability technology, etc.; optical axis, bearing and rolling technology are adopted in many places, so that the contact group has low wear during use, flexible rotation and movement, no card group, reliable electrical action, long life, no trouble, and maintenance-free. After various tests, it exceeds the current highest requirements of the China Railway Corporation for the contact group, and the electrical performance is reliable, stable and safe; it solves many defects of existing equipment, such as point contact, broken retaining ring, broken contact column, large wear, large unilateral deviation of contact piece, large micro-environmental impact (frost, contamination, white wax) and many other faults that affect electrical contact, and can ensure the quality and safety of the use of key railway equipment. The bottom shell and the upper shell are both made of transparent materials with excellent physical and chemical properties. The contact status and contact wear and other usage conditions can be seen through the shell to prevent any electrical failure, which can be discovered and replaced or repaired in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2is a top view of the present invention;

[0015] Figure 3 is a side view of the present invention;

[0016] Figure 4 It is a structural schematic diagram of the central swing body of the present invention;

[0017] Figure 5 is a side view of the central swing body of the present invention;

[0018] Figure 6 It is a schematic diagram of the contact combination of the present invention.

[0019] In the figure: 1. bottom shell; 2. upper shell; 3. central swing body; 4. static point upper piece; 5. moving contact; 6. static point lower piece; 7. driving block; 8. fixing bolt; 9. mounting bolt; 10. terminal; 11. static point right unit; 12. static point left unit; 13. guide block; 14. concave and convex groove; 15. moving point optical axis; 16. roller; 17. insulating protective cover; 18. sealing ring; 19. moving point; 20. swing lower block; 21. swing upper block; 22. roller shaft. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] Example

[0022] like Figure 1-6As shown, the present invention provides an integrated sealed contact group for railways, including a bottom shell 1, an upper shell 2, a central swing body 3, a static point unit, a moving contact 5, a drive block 7, an insulating protective cover 17 and a terminal 10. The bottom shell 1 and the upper shell 2 are fixed as a whole by fixing bolts 8, and the contact group is installed on the base of the automatic switch by installing bolts 9. The upper shell 2 is arranged above the bottom shell 1, and the upper shell 2 is fixedly connected to the bottom shell 1 by fixing bolts 8. Six terminals 10 are symmetrically arranged at both ends of the top of the upper shell 2, and a static point upper piece 4 and a static point lower piece 6 are arranged below the terminal 10. The static point upper piece 4 and the static point lower piece 6 are combined into a static point unit. The static point unit is located on both sides of the moving point optical axis 15. The static point unit is provided with a static point right unit 11 and a static point left unit 12. The static point right unit 11 and the static point left unit 12 are combined Become a group of static contacts, forming a total of six groups of static contacts; the central swing body 3 is arranged inside the bottom shell 1, and the central swing body 3 is composed of a moving point optical axis 15, a roller 16, a moving point 19, a swing lower block 20, a swing upper block 21 and a roller shaft 22. The moving point optical axis 15 is arranged inside the bottom shell 1, and three moving point optical axes 15 are arranged at equal intervals, and moving points 19 are arranged at both ends of the three moving point optical axes 15. A swing upper block 21 is arranged above the moving point optical axis 15, and a swing lower block 20 is arranged below the moving point optical axis 15. A roller shaft 22 is arranged at the bottom of the swing lower block 20, and a roller 16 is arranged on the axis of the roller shaft 22. The roller 16 and the driving block 7 are in an active connection state when the switch is in action. The driving block 7 is separate from the contact group and is mounted on the automatic switch bracket by an M6 bolt.

[0023] The moving point optical axis 15 and the bottom shell 1 are supported by guide blocks 13 arranged on two partitions in the middle. The guide blocks 13 are installed with sealing rings 18. The moving point optical axis 15 can move on two symmetrical guide blocks 13. The moving contact 5 adopts a solid cylindrical dumbbell structure and is installed at both ends of the moving point optical axis 15. When in motion, it forms a group of contact switch combinations with the static point right unit 11 and the static point left unit 12, forming a total of six groups of moving points 19 and static point combinations, which are closed in a line contact manner. A protrusion or groove-shaped physical isolation is added between the adjacent static point right unit 11 and the static point left unit 12 to increase electrical creepage. distance, an insulating protective cover 17 is provided at the terminal of the terminal post 10 to ensure the electrical insulation resistance and impact withstand voltage. The design forms a forced disconnection, which is not disturbed by other factors such as wear and tear, foreign matter and moisture, thereby ensuring the excellent overall electrical insulation performance of the product. The connecting parts of the upper shell 2 and the bottom shell 1 are provided with concave-convex grooves 14, and the inner partition connecting the guide block 13 and the bottom shell 1 is also provided with a concave-convex groove 14. A sealing ring 18 is provided between the guide block 13 and the moving point optical axis 15. The upper and lower shells are fixedly connected by fixing bolts 8, and insulating sealant is provided on the edges and in the grooves to form an integrated sealed contact group.

[0024] The contact switch combination maintains the original left and right unit structure, but the direction is different from the original, rotated 90°, and is designed as two upper and lower spring pieces with the same potential, with an additional contact point to form a redundant structure. The upper piece or the lower piece on either side can be electrically connected to any upper or lower contact piece on the other side through the moving contact 5 to form a connected state, forming contact redundancy, making the contact group safer and more reliable when in contact.

[0025] The moving point 19 adopts a solid dumbbell structure, and the side of the moving point 19 has an arc surface with a small angle and small friction. The moving point 19 can rotate freely and smoothly in the light holes at both ends of the optical axis under the push of the contact sheet friction. The axis is small and the rotation inertia is large, which is conducive to rotation, and there is no wear of the fixed point to affect the life of the moving point 19. The existing thin-walled moving contact 5 ring and retaining ring blocking structure are eliminated, forming a high mechanical strength, good rotation, and no potential breakage failure of the split pin retaining ring contact column.

[0026] The connecting parts of the upper shell 2 and the bottom shell 1 are both provided with concave-convex grooves 14, and the inner partition connecting the guide block 13 and the bottom shell 1 is also provided with concave-convex grooves 14. There is a seal between the guide block 13 and the moving point optical axis 15. The upper and lower shells are fixedly connected by fixing bolts 8, and insulating sealant is provided on the edges and in the grooves to form an integrated sealed contact group.

[0027] Specifically, when the present invention is used, the bottom shell 1 and the upper shell 2 are both made of transparent materials with excellent physical and chemical properties. The contact status and contact wear and other usage conditions can be seen through the shell to prepare for timely discovery and replacement or maintenance. The original installation and external dimensions are almost unchanged, and it can be completely interchangeable with the existing contacts, with a significant upgrade in function. No adjustment is required during installation, and it is simple and fast. The present invention adopts electrical contact redundancy technology, converting fan-shaped rotation and swing into reciprocating linear motion technology, concave-convex physical nesting isolation technology, integrated sealing technology and interchangeability technology, etc. Optical axis, bearing and rolling technology are used in many places, so that the contact group has low wear during use, flexible movement and rotation, no card group, reliable electrical action, long life, no trouble, and maintenance-free. After various tests, it exceeds the highest requirements of the China Railway Corporation for the contact group, and the electrical performance is reliable, stable and safe. It solves many defects of existing equipment, such as point contact, broken retaining ring, broken contact column, large unilateral deviation of contact piece, large impact of small environment (frost, contamination, white wax) and many other faults affecting electrical contact, which can ensure the quality and safety of the use of key railway equipment.

[0028] Furthermore, the closed structure may be in the form of a semi-closed structure.

[0029] Furthermore, the combination of the central swing body 3 and the moving point 19 can be divided into three parts, each of which is independent. The swing block is then modified into three slots.

[0030] Furthermore, the moving point 19 may also be in the shape of an existing ring or inclined insert.

[0031] Furthermore, the static point unit may adopt a rearward extension structure of the wiring portion rather than an upward flipping structure.

[0032] The technology of the present invention is used to control the action of railway turnout switch machines, indicate that the inbound and outbound turnouts stay in the fixed or reverse position and state, and realize five groups of moving contacts of mechanism locking and electrical interlocking, and is particularly suitable for the supporting contact groups of switch machines used in high-speed railways or subways.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An integrated sealed contact assembly for railway, comprising a bottom shell (1), an upper shell (2), a central swing body (3), a static point unit, a moving contact (5), a drive block (7), an insulating protective cover (17) and a terminal (10), wherein the bottom shell (1) and the upper shell (2) are fixed together by fixing bolts (8), and the contact assembly is installed on the base of an automatic switch by mounting bolts (9), characterized in that: The upper shell (2) is arranged above the bottom shell (1), and the upper shell (2) is fixedly connected to the bottom shell (1) by fixing bolts (8). Six connecting posts (10) are symmetrically arranged at both ends of the top of the upper shell (2), and a static point upper piece (4) and a static point lower piece (6) are arranged below the connecting posts (10). The static point upper piece (4) and the static point lower piece (6) are combined into a static point unit. The static point unit is located on both sides of the moving point optical axis (15), and the static point unit is provided with a static point right unit (11) and a static point left unit (12). 2), the static point right unit (11) and the static point left unit (12) are combined into a group of static contacts, forming a total of six groups of static contacts; the central swing body (3) is arranged inside the bottom shell (1), the central swing body (3) is composed of a moving point optical axis (15), a roller (16), a moving point (19), a swing lower block (20), a swing upper block (21) and a roller shaft (22), the moving point optical axis (15) is arranged inside the bottom shell (1), and three moving point optical axes (15) are arranged at equal intervals, and the three moving point optical axes (15) Both ends of the movable point (19) are provided, an upper swing block (21) is provided above the movable point optical axis (15), a lower swing block (20) is provided below the movable point optical axis (15), a roller shaft (22) is provided at the bottom of the lower swing block (20), a roller (16) is provided on the axis of the roller shaft (22), the roller (16) and the driving block (7) are in an active link state when the switch is in operation, the driving block (7) is independent of the contact group, and is installed on the automatic switch bracket by M6 bolts; The moving point optical axis (15) and the bottom shell (1) are supported by guide blocks (13) arranged on two partitions in the middle. The guide blocks (13) are equipped with sealing rings (18). The moving point optical axis (15) can move on two symmetrical guide blocks (13). The moving contact (5) adopts a solid cylindrical dumbbell structure and is installed at both ends of the moving point optical axis (15). When in motion, it forms a contact switch combination with the static point right unit (11) and the static point left unit (12), forming a total of six groups of moving points (19) and static point combinations, which are closed in a line contact manner.

2. The integrated sealed contact assembly for railway according to claim 1, characterized in that: A protrusion or groove-shaped physical isolation is added between the adjacent static point right unit (11) and static point left unit (12) to increase the electrical creepage distance.

3. The integrated sealed contact assembly for railway according to claim 1, characterized in that: An insulating protective cover (17) is arranged outside the terminal of the binding post (10).

4. The integrated sealed contact assembly for railway use according to claim 1, characterized in that: The connection parts of the upper shell (2) and the bottom shell (1) are both provided with concave-convex grooves (14), and the inner partition plate connecting the guide block (13) and the bottom shell (1) is also provided with concave-convex grooves (14). A sealing ring (18) is provided between the guide block (13) and the moving point optical axis (15). The upper and lower shells are fixedly connected by fixing bolts (8), and insulating sealant is provided on the edges and in the grooves to form an integrated sealed contact group.

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