Rapid plugging structure for cable and power supply of plasma igniter

Abstract

The invention discloses a rapid plugging structure for a cable and a power supply of a plasma igniter, relates to the technical field of igniters, and solves the problems of long connection time, easy loosening and poor safety of a connection part of the cable and the power supply of the plasma igniter. The power supply rotating locking device is of a centrosymmetric coaxial rotating structure and internally comprises two clamping blocks, two limiting grooves, two annular mounting grooves, two mounting plates and two insertion openings, and the fan-shaped central angles of the clamping blocks and the limiting grooves are smaller than the insertion openings, so that the clamping blocks can be conveniently pushed in from the insertion openings, and the power supply rotating locking device is rotated clockwise or anticlockwise. Mutual clamping of the cable rotation locking ring and the power supply rotation locking ring is realized; blind insertion is achieved through the fan-shaped angle difference between the clamping block and the insertion opening, rapid insertion can be achieved without accurate alignment, rapid and stable connection of the cable and the power supply is achieved, and meanwhile the safety of the connection process is improved.

Description

Technical Field

[0001] This invention relates to the technical field of igniters, and more particularly to a quick-connect structure for a plasma igniter cable and power supply. Background Technology

[0002] Plasma igniters in gas turbine combustion chambers are widely used due to their high efficiency and stable ignition performance. With the continuous expansion of gas turbine applications, the frequency of use of plasma igniters is also increasing. In the entire plasma ignition system, the cable connector is a weak link. The insertion and removal process of the cable and power connection of the plasma igniter relies on multiple thread rotations or complex alignments, which is time-consuming and difficult to adapt to high-frequency maintenance requirements. The connection interface lacks a reliable sealing design, allowing dust and moisture from environments such as the gas turbine combustion chamber to easily penetrate, leading to poor contact or component corrosion. This not only affects ignition efficiency but may also pose safety hazards to gas turbine operation. Cable faults caused by cable connectors account for a major portion of cable faults, and the special location of cable connectors often makes troubleshooting time-consuming, resulting in excessively high fault diagnosis and repair costs. Therefore, to achieve optimal control performance at intermediate and terminal joints and reduce maintenance complexity, the convenience and reliability of the connection method between cable connectors and the power supply have become issues of widespread concern.

[0003] In the manufacturing process of high-voltage cable connectors for plasma igniters, traditional threaded connections are time-consuming and labor-intensive, with lengthy disassembly processes that can sometimes damage the workpiece or injure operators. These inconveniences of traditional connection methods severely reduce the production efficiency of high-voltage cables for plasma igniters. Summary of the Invention

[0004] In view of the problems of long connection time, easy loosening, and poor safety of the cable and power supply connection of the plasma igniter mentioned above, the purpose of this invention is to provide a quick plug-in structure for the cable and power supply of the plasma igniter, so as to realize efficient and safe quick plug-in of the cable and power supply of the gas turbine combustion chamber plasma igniter, ensure the fast and stable connection of the cable and power supply, and improve the safety of the connection process.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A quick-connection structure for a plasma igniter cable and power supply includes: a rotary locking device 1, a cable connector 2, and a power supply rotary locking device 5, wherein the upper ends of the rotary locking device 1 and the cable connector 2 are detachably connected.

[0007] Rotary locking device 1 includes: cable rotary locking ring 11 and hollow hexagonal structure 12; power rotary locking device 5 includes: power rotary locking ring 51;

[0008] The cable rotary locking ring 11 and the power rotary locking ring 51 have the same structural dimensions and are interlocked with each other. The hollow hexagonal structure 12 is used to limit the power rotary locking ring 51.

[0009] The cable rotating locking ring 11 includes: an annular cylinder, a mounting plate 114, and locking blocks 111. The bottom edge of the annular cylinder is connected to the upper end of the hollow hexagonal structure 12. Two mounting plates 114 are centrally symmetrically arranged, and each mounting plate 114 is connected to the top edge of the annular cylinder. An annular mounting groove 113 is provided between each mounting plate 114 and the hollow hexagonal structure 12. Two locking blocks 111 are centrally symmetrically arranged, and each locking block 111 is located between the two mounting plates 114. The bottom of each locking block 111 is connected to the upper surface of the hollow hexagonal structure 12, and both locking blocks 111 are connected to the inner wall of the annular cylinder. Each locking block 111 has a limiting groove 112 facing the outer periphery of the annular cylinder. Both limiting grooves 112 are higher than the upper surface of the mounting plate 114. An insertion port 115 is provided between each locking block 111 and its clockwise / counterclockwise mounting plate 114. The width of the insertion port 115 is greater than the width of the locking block 111.

[0010] When the power supply rotary locking device 5 is connected to the rotary locking device 1, each mounting plate 114 of the cable rotary locking ring 11 is engaged in a limiting groove 112 of the power supply rotary locking ring 51.

[0011] The aforementioned plasma igniter cable and power supply quick-connect structure includes a rotary locking device 1 that further comprises: a rotary locking device tail ring 14. The cable rotary locking ring 11, the hollow hexagonal structure 12, and the rotary locking device tail ring 14 are connected in sequence from top to bottom as a whole and are coaxially arranged. The inner diameter of the hollow hexagonal structure 12 is smaller than the inner diameter of the annular cylinder.

[0012] In the aforementioned plasma igniter cable and power supply quick-connect structure, the inner wall of the tail end ring 14 of the rotary locking device is provided with an internal thread and extends into the hollow hexagonal structure 12.

[0013] The aforementioned plasma igniter cable and power supply quick-connect structure includes a rotary locking device 1 that further includes a retaining ring nut 13. The outer wall of the retaining ring nut 13 is provided with external threads, and the retaining ring nut 13 and the tail end ring 14 of the rotary locking device are connected by threads.

[0014] In the aforementioned quick-connect structure for the plasma igniter cable and power supply, the top end of the cable connector 2 is provided with a retaining ring nut positioning ring 21 and a locking ring 22. The locking ring 22 is coaxially arranged with the retaining ring nut positioning ring 21 and is located above the retaining ring nut positioning ring 21. The outer diameter of the retaining ring nut positioning ring 21 is larger than the inner diameter of the retaining ring nut 13 and smaller than the inner diameter of the tail end ring 14 of the rotary locking device.

[0015] When the rotary locking device 1 and the cable connector 2 are assembled together, the retaining ring nut 13 is sleeved on the cable connector 2 and located below the retaining ring nut positioning ring 21.

[0016] The aforementioned quick-connect structure for the plasma igniter cable and power supply further includes: a knurled nut 3 and a cable connector shielding layer 4. The bottom end of the cable connector connector 2 is provided with an external thread 23 at the tail of the cable connector connector. The knurled nut 3 is connected to the end of the cable connector shielding layer 4 and is threadedly connected to the external thread 23 at the tail of the cable connector connector.

[0017] The aforementioned quick-connect structure for the plasma igniter cable and power supply includes a cable connector 2 with a stepped hollow structure that runs vertically through the inside and has an upper inner diameter larger than its lower inner diameter.

[0018] The aforementioned quick-connection structure for the plasma igniter cable and power supply further includes: a sliding sleeve, the outer diameter of which is smaller than the lower inner diameter of the cable connector 2, and an outwardly extending annular limiting protrusion at the top of the sliding sleeve, the outer diameter of which is larger than the lower inner diameter of the cable connector 2 and smaller than the upper inner diameter of the cable connector 2.

[0019] The aforementioned quick-connect structure for the plasma igniter cable and power supply further includes: a return spring, which is sleeved on a sliding sleeve. The upper end of the return spring abuts against the annular limiting protrusion of the sliding sleeve, and the lower end of the return spring abuts against the stepped diameter change position between the upper and lower sides inside the cable connector 2. Washers are provided at all threaded connections. The sliding sleeve is restricted in the stepped hole inside the cable connector 2 by its own annular limiting protrusion, thereby preventing it from coming out. The power supply rotation locking device 5 is fixed to the connection between the power supply and the cable via a threaded connection. All component materials should be anti-static, insulating, and waterproof.

[0020] In the aforementioned quick-connect structure for the plasma igniter cable and power supply, the length of either the mounting plate 114 located on the cable rotating locking ring 11 or the power rotating locking ring 51 is twice that of the locking block 111.

[0021] The present invention, by employing the above-mentioned technology, has the following positive effects compared with the prior art:

[0022] (1) In this invention, the cable rotary locking ring and the power rotary locking ring have the same structural dimensions and are both coaxial rotating structures with central symmetry. They include two locking blocks, two limiting grooves, two annular mounting grooves, two mounting plates and two insertion ports. The central angle of the sector of the locking blocks and the limiting grooves is smaller than that of the insertion ports, which makes it easier for the locking blocks to be pushed in through the insertion ports and for the power rotary locking device to be rotated clockwise or counterclockwise to achieve mutual locking of the cable rotary locking ring and the power rotary locking ring.

[0023] (2) In this invention, both the cable rotating locking ring and the power rotating locking ring adopt the design that the fan-shaped central angle of the mounting plate is twice that of the card block, and the annular mounting groove is axially equal to the width of the card block. This makes the axial fixation of the cable rotating locking ring and the power rotating locking ring more secure after they are inserted, improves the vibration resistance, and allows free rotation at a certain angle to avoid cable twisting.

[0024] (3) In this invention, blind insertion is achieved by the fan-shaped angle difference between the card block and the insertion port. It can be quickly inserted without precise alignment. Combined with the anti-slip design of the knurled nut, it solves the problem of "difficulty in aligning the hole" in the traditional structure. The insertion process takes ≤2 seconds. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a quick-connect structure for a plasma igniter cable and power supply according to the present invention.

[0026] Figure 2 This is a cross-sectional view of the cable and power supply after the assembly of a plasma igniter cable and power supply quick-connect structure according to the present invention.

[0027] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0028] Figure 4 This is a schematic diagram of the rotating locking device of a plasma igniter cable and power supply quick-connect structure according to the present invention.

[0029] Figure 5 This is a cross-sectional view of a rotary locking device for a quick-connect structure of a plasma igniter cable and power supply according to the present invention.

[0030] Figure 6 This is a schematic diagram of the power supply rotary locking device of the plasma igniter cable and power supply quick-connect structure of the present invention.

[0031] In the attached diagram: 1. Rotary locking device; 2. Cable connector; 3. Knurled nut; 4. Cable connector shielding layer; 5. Power supply rotary locking device; 11. Cable rotary locking ring; 111. Locking block; 112. Limiting groove; 113. Annular mounting groove; 114. Mounting plate; 115. Insertion port; 12. Hollow hexagonal structure; 13. Retaining ring nut; 14. Tail end ring of rotary locking device; 21. Retaining ring nut positioning ring; 22. Locking ring; 23. Tail external thread of cable connector; 51. Power supply rotary locking ring. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0033] Please refer to Figures 1 to 6 As shown, a quick-connect structure for a plasma igniter cable and power supply is illustrated, comprising: a rotary locking device 1, a cable connector 2, and a knurled nut 3, wherein the rotary locking device 1, the cable connector 2, and the knurled nut 3 are directly or indirectly connected by threads.

[0034] Furthermore, in a preferred embodiment, the rotary locking device 1 includes: a cable rotary locking ring 11, a hollow hexagonal structure 12, and a retaining ring nut 13, wherein the hollow hexagonal structure 12 is connected to the tail end ring 14 of the rotary locking device.

[0035] Furthermore, in a preferred embodiment, the cable connector 2 includes: a retaining ring nut positioning ring 21, a locking ring 22, and an external thread 23 at the tail of the cable connector;

[0036] Furthermore, in a preferred embodiment, one end of the cable connector 2 is threadedly connected to the tail ring 14 of the rotary locking device via a retaining ring nut 13, and the retaining ring nut positioning ring 21 ensures axial positioning, while the locking ring 22 and the hollow hexagonal structure 12 inside the rotary locking device 1 ensure radial positioning. The other end is connected to the knurled nut 3 via the external thread 23 at the tail of the cable connector, and positions the cable connector shielding layer 4. The hollow hexagonal structure 12 and the locking ring 22 cooperate to form a double radial locking structure, which makes the radial force uniform and extends the insertion and extraction life.

[0037] Furthermore, in a preferred embodiment, the present invention provides a quick-connect structure for the cable and power supply of a plasma igniter. This invention relates to the field of igniter technology, addressing the common problems of long connection time, easy loosening, and poor safety in the cable and power supply connection of plasma igniters. It optimizes the connection for the specific requirements of plasma igniters, such as speed of high-frequency insertion and removal, sealing, and high-voltage insulation. The quick-connect structure includes: a rotary locking device 1, a cable connector 2, and a knurled nut 3; the rotary locking device 1 has a retaining ring nut 13, a hollow hexagonal structure 12, and a cable rotary locking ring 11, which can be quickly locked with the power supply rotary locking ring 51 on the power supply box; the cable connector 2 has a coaxial hollow structure inside, with a retaining ring nut positioning ring 21 at one end, which is assembled with the rotary locking device 1 via the retaining ring nut 13, and the other end is assembled with the knurled nut 3 via a threaded connection, ensuring the overall stability of the cable connector, and also includes a cable connector shielding layer 4 to provide insulation.

[0038] The present invention enables quick connection between the cable connector and the power supply through the power supply rotary locking device 5 and the rotary locking device 1 of the cable connector.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0040] In addition to the above, the present invention also has the following embodiments:

[0041] In a further embodiment of the present invention, the cable rotary locking ring 11 and the power supply rotary locking ring 51 have the same structural dimensions and are both centrally symmetrical coaxial rotating structures. Each includes two locking blocks 111, two limiting grooves 112, two annular mounting grooves 113, two mounting plates 114, and two insertion ports 115. The central angle of the sector of the locking blocks 111 and the limiting grooves 112 is smaller than that of the insertion ports 115, facilitating the insertion of the locking blocks 111 through the insertion ports 115 and the rotation of the power supply rotary locking device 5 clockwise or counterclockwise to achieve the connection between the cable rotary locking ring 11 and the power supply rotary locking ring 51. The mutual locking of the mounting plate 114 and the power supply rotating locking ring 51 is achieved by interlocking the mounting plate 114. The central angle of the sector of the mounting plate 114 is at least twice that of the locking block 111 and the limiting groove 112, leaving room for at least one rotation angle of the central angle of the sector of the locking block 111, so that the locking block 111 can rotate within a certain range. The axial widths of the locking block 111 and the annular mounting groove 113 are equal, and the axial widths of the limiting groove 112 and the annular mounting groove 113 are equal, so that the locking block 111 can be locked in the annular mounting groove 113 and the mounting plate 114 can be locked in the limiting groove 112, thereby achieving the mutual locking of the cable rotating locking ring 11 and the power supply rotating locking ring 51.

[0042] In a further embodiment of the present invention, both the cable rotating locking ring 11 and the power rotating locking ring 51 adopt a design where the central angle of the sector of the mounting plate 114 is twice that of the locking block 111, and the annular mounting groove 113 is axially equal in width to the locking block 111. This design makes the axial fixation of the cable rotating locking ring 11 and the power rotating locking ring 51 more secure after insertion, improves the vibration resistance, and allows free rotation at a certain angle to avoid cable twisting.

[0043] In a further embodiment of the present invention, blind insertion is achieved by the fan-shaped angular difference between the card block 111 and the insertion port 115, which allows for quick insertion without precise alignment. Combined with the anti-slip design of the knurled nut 3, the problem of "difficult hole alignment" in the traditional structure is solved, and the insertion process takes ≤2 seconds.

[0044] In a further embodiment of the present invention, the cable connector shielding layer 4 is integrally connected with the knurled nut 3, and after assembly, it is clamped and fixed with hydraulic clamps. The lower part of the cable connector connector 2 and the cable connector shielding layer 4 adopt an interference fit design to reduce the contact resistance. Figure 2 As shown.

[0045] In a further embodiment of the present invention, the power supply rotary locking device 5 on the plasma igniter power supply includes a power supply rotary locking ring 51. The power supply rotary locking ring 51 and the cable rotary locking ring 11 in the rotary locking device 1 have the same geometric structure and are mutually engaged.

[0046] In a further embodiment of the present invention, by designing the central angle of the sector of the mounting plate 114 to be twice that of the locking block 111, the axial position of the power supply rotating locking ring 51 and the cable rotating locking ring 11 is fixed after rotational locking, but relative free rotation can be achieved within a certain range.

[0047] In a further embodiment of the present invention, the cable connector shielding layer 4 can ensure insulation under high-voltage conditions.

[0048] In a further embodiment of the present invention, a quick-connection structure for a plasma igniter cable and power supply is provided. Through optimized structural design, a rotating locking ring within the rotating locking device of the power supply and cable connector is used to achieve quick connection between the cable connector and the power supply, thereby realizing an efficient and safe quick-connection structure for a gas turbine combustion chamber plasma igniter cable and power supply.

[0049] In further embodiments of the present invention, such as Figures 1 to 5As shown in the embodiment of the present invention, a quick-connect structure for a plasma igniter cable and power supply is provided, which enables a quick, stable and safe connection between the cable (cable connector 2) and the power supply (power supply rotary locking device 5). During the connection process, the locking block 111 and the limiting groove 112 are inserted into the insertion port 115, and the upper part of the locking block 111 is pressed against the bottom of the annular mounting groove 113. Then, it is rotated clockwise or counterclockwise until the limiting groove 112 is fully assembled with the mounting plate 114. After the assembly is completed, the power supply rotary locking device 5 and the rotary locking device 1 are axially and completely fixed.

[0050] In a further embodiment of the present invention, the central angle of the sector of the locking block 111 and the limiting groove 112 in the rotating locking ring 11 on the cable connector is smaller than that of the insertion port 115. The central angle of the sector of the mounting plate 114 is at least twice that of the locking block 111 and the limiting groove 112. The axial widths of the locking block 111 and the annular mounting groove 113 are equal, and the axial widths of the limiting groove 112 and the annular mounting groove 113 are equal. The power rotating locking ring 51 included in the power rotating locking device 5 on the plasma igniter power supply has the same geometric structure as the cable rotating locking ring 11 in the rotating locking device 1. Furthermore, when processing the above structure, the tolerance processing standard should conform to GB / T 1804-f.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-connect structure for a plasma igniter cable and power supply, characterized in that, include: Rotary locking device (1), cable connector (2) and power supply rotary locking device (5), the upper ends of the rotary locking device (1) and cable connector (2) are detachably connected; The rotary locking device (1) includes: a cable rotary locking ring (11) and a hollow hexagonal structure (12); the power rotary locking device (5) includes: a power rotary locking ring (51); The cable rotary locking ring (11) and the power rotary locking ring (51) have the same structural dimensions and are interlocked with each other. The hollow hexagonal structure (12) is used to limit the power rotary locking ring (51). The cable rotating locking ring (11) includes: an annular cylinder, a mounting plate (114), and a locking block (111). The bottom edge of the annular cylinder is connected to the upper end of the hollow hexagonal structure (12). Two mounting plates (114) are centrally symmetrically arranged, and both mounting plates (114) are connected to the top edge of the annular cylinder. An annular mounting groove (113) is provided between each mounting plate (114) and the hollow hexagonal structure (12). Two locking blocks (111) are centrally symmetrically arranged, and each locking block (111) is located between the two mounting plates (114). Between, the bottom of both locking blocks (111) is connected to the upper surface of the hollow hexagonal structure (12), and both locking blocks (111) are connected to the inner wall of the annular cylinder. Each locking block (111) has a limiting groove (112) facing the outer periphery of the annular cylinder. Both limiting grooves (112) are higher than the upper surface of the mounting plate (114). Each locking block (111) has an insertion port (115) between it and the clockwise / counterclockwise mounting plate (114). The width of the insertion port (115) is greater than the width of the locking block (111). When the power supply rotary locking device (5) is connected to the rotary locking device (1), each mounting plate (114) of the cable rotary locking ring (11) is engaged in a limiting groove (112) of the power supply rotary locking ring (51); each mounting plate (114) of the power supply rotary locking ring (51) is engaged in a limiting groove (112) of the cable rotary locking ring (11).

2. The plasma igniter cable and power supply quick-connect structure according to claim 1, characterized in that, The rotary locking device (1) also includes: a rotary locking device tail ring (14), a cable rotary locking ring (11), a hollow hexagonal structure (12) and a rotary locking device tail ring (14) connected in sequence from top to bottom as a whole and the three are coaxially arranged. The inner diameter of the hollow hexagonal structure (12) is smaller than the inner diameter of the annular cylinder.

3. The quick-connect structure for the plasma igniter cable and power supply according to claim 2, characterized in that, The inner wall of the end ring (14) of the rotary locking device is provided with internal threads and extends into the hollow hexagonal structure (12).

4. The quick-connect structure for the plasma igniter cable and power supply according to claim 3, characterized in that, The rotary locking device (1) also includes a retaining ring nut (13), the outer wall of which is provided with external threads, and the retaining ring nut (13) and the tail end ring (14) of the rotary locking device are connected by threads.

5. The quick-connect structure for the plasma igniter cable and power supply according to claim 4, characterized in that, The top end of the cable connector (2) is provided with a retaining ring nut positioning ring (21) and a locking ring (22). The locking ring (22) is coaxially arranged with the retaining ring nut positioning ring (21) and located above the retaining ring nut positioning ring (21). The outer diameter of the retaining ring nut positioning ring (21) is larger than the inner diameter of the retaining ring nut (13) and smaller than the inner diameter of the tail end ring (14) of the rotary locking device. When the rotary locking device (1) and the cable connector (2) are assembled together, the retaining ring nut (13) is fitted onto the cable connector (2) and located below the retaining ring nut positioning ring (21).

6. The quick-connect structure for the plasma igniter cable and power supply according to claim 5, characterized in that, Also includes: Knurled nut (3) and cable connector shielding layer (4), the bottom end of the cable connector connector (2) is provided with cable connector tail external thread (23), the knurled nut (3) is connected to the end of the cable connector shielding layer (4) and threadedly connected to the cable connector tail external thread (23).

7. The quick-connect structure for the plasma igniter cable and power supply according to claim 6, characterized in that, The cable connector (2) has a stepped hollow structure that runs vertically through the inside and the inner diameter of the upper side is larger than that of the lower side.

8. The quick-connect structure for the plasma igniter cable and power supply according to claim 7, characterized in that, Also includes: The sliding sleeve has an outer diameter smaller than the lower inner diameter of the cable connector (2). The top of the sliding sleeve has an outwardly extending annular limiting protrusion. The outer diameter of the annular limiting protrusion is larger than the lower inner diameter of the cable connector (2) and smaller than the upper inner diameter of the cable connector (2).

9. The quick-connect structure for the plasma igniter cable and power supply according to claim 8, characterized in that, Also includes: The return spring is sleeved on the sliding sleeve. The upper end of the return spring abuts against the annular limiting protrusion of the sliding sleeve, and the lower end of the return spring abuts against the stepped diameter change position between the upper and lower sides inside the cable connector (2).

10. The quick-connect structure for the plasma igniter cable and power supply according to claim 9, characterized in that, The length of either mounting plate (114) located on the cable rotary locking ring (11) or the power rotary locking ring (51) is twice that of the locking block (111).

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