Pressure-free self-locking integrated closed joint

Abstract

The invention discloses a pressure-free self-locking integrated closed joint which comprises a body installed on a transformer connecting column, the body is composed of an installation head and a hollow wiring body, and the installation head is fixedly installed on the transformer connecting column; a wire hole seat is mounted at one end, far away from the mounting head, of the wiring body; a conical shaft which is reset by a reset spring to plug a wire hole of the wire hole seat is mounted in the wiring body; the cone shaft comprises a cone and a cone shaft tail rod, a wire tightening rod with two ends extending out of the wire connecting body is slidably mounted on the wire connecting body, a wire tightening ring is mounted on the outer wall of the wire connecting body in a threaded manner, an annular groove is formed in the wire tightening ring, two ends of the wire tightening rod extend into the annular groove, and when the wire tightening ring is rotated, the wire tightening ring drives the wire tightening rod to move, so that the wire tightening rod abuts against the tail part of the cone shaft tail rod; the structure has the advantages of quick connection, lock-free self-pressing, wire saving, easiness in high-altitude operation and convenience in maintenance. And an electrified body is completely wrapped by an insulating material, so that the risk of personal electric shock existing in a conventional non-insulating rack can be effectively reduced, and the rack is safe and reliable.

Description

Technical Field

[0001] The invention relates to a connection device for transformers, vacuum circuit breakers and the like in a high-voltage stand, in particular to a pressure-free self-locking integrated closed joint. Background Art

[0002] At present, the connections between transformers, vacuum circuit breakers, fuses, lightning arresters, etc. and wires in high-voltage test racks all use exposed crimping terminals. The disadvantage is that it cannot solve the problem of short circuits caused by ice, snow, rain, strong winds, birds and animals, and corrosion caused by the harsh coastal environment. In addition, this exposed connection has low installation efficiency, high labor intensity, and poor current transmission. The crimping connection method also causes waste of wires and cannot be used for high-altitude operations. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a pressure-free self-locking integrated closed joint.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A pressure-free self-locking integrated closed joint comprises a main body installed on a transformer connecting column, the main body consists of a mounting head and an internally hollow wiring body, the mounting head is fixedly mounted on the transformer connecting column; a wire hole seat is installed at one end of the wiring body away from the mounting head, and a conical shaft is installed in the wiring body, which is reset by a reset spring to block the wire plug hole of the wire hole seat; the conical shaft comprises a cone and a conical shaft tail rod, a tightening rod with two ends extending out of the wiring body is slidably mounted on the wiring body, a part of the outer wall of the wiring body has a first external thread, a tightening ring is threadedly mounted on the wiring body through the first external thread, an annular groove is arranged in the tightening ring, two ends of the tightening rod extend into the annular groove, and when the tightening ring is rotated, the tightening ring drives the tightening rod to move, so that the tightening rod is abutted against the tail of the conical shaft tail rod.

[0005] Furthermore, a sliding groove for the tightening rod to slide is provided at a position of the tightening ring corresponding to the wiring body in the range of axial movement of the wiring body.

[0006] Furthermore, the portion where the cone of the cone shaft contacts the wire hole seat has a first bending angle, and correspondingly, the wire hole seat has a second bending angle matching the first bending angle.

[0007] Furthermore, one end of the tightening ring is provided with a first internal thread, and the other end of the tightening ring is installed with a positioning ring, and the positioning ring and the first internal thread are surrounded to form the annular groove.

[0008] Furthermore, the wiring body is provided with a second external thread on the outer wall near the mounting head, the second external thread and the first external thread are reverse threads, the connector is threadedly mounted with a shell through the second external thread, the shell can cover the tightening wire ring, a sealing portion is provided at one end of the shell away from the mounting head, a sealing ring is installed inside the sealing portion, a tightening cover is threadedly mounted on the outer wall of the sealing portion, and after installation, one end of the sealing ring extends out of the sealing portion, and the inside of the tightening cover abuts against the sealing ring.

[0009] Furthermore, the sealing ring is provided with a first inclined surface, the tightening cover is provided with a second inclined surface corresponding to the first inclined surface, and the first inclined surface abuts against the second inclined surface.

[0010] Furthermore, a second internal thread is provided in the tightening cover, a step buckle is provided on the sealing portion, the length of the second internal thread is greater than the length of the step buckle, and when the tightening cover is loosened to the limit, the end face of the second internal thread abuts against the step buckle.

[0011] Furthermore, a soft gasket is installed between the tightening cover and the shell.

[0012] Furthermore, an outer sheath is mounted on the mounting head, one end of the outer sheath close to the transformer connecting column is in contact with the transformer connecting column, and the other end of the outer sheath is in contact with the end surface of the outer shell, and a hard gasket is installed between the mounting head and the transformer connecting column.

[0013] Furthermore, the mounting head is provided with symmetrical screw holes, and the mounting head is provided with symmetrical through grooves, the through grooves divide the screw holes into a nut portion and a threaded portion, and a screw is installed between the nut portion and the threaded portion to squeeze the through grooves.

[0014] The beneficial effects of the present invention are as follows: the main body of the present invention is composed of a mounting head and an internally hollow wiring body, the mounting head is fixedly mounted on the transformer connecting column; a wire hole seat is mounted on one end of the wiring body away from the mounting head, a conical shaft is mounted inside the wiring body, and the wire hole seat plug hole is blocked by a reset spring, the conical shaft includes a cone and a tail rod of the conical shaft, a tightening rod with both ends extending out of the wiring body is slidably mounted on the wiring body, a tightening ring is threadedly mounted on the outer wall of the wiring body, an annular groove is arranged inside the tightening ring, and both ends of the tightening rod extend into the annular groove, and when the tightening ring is rotated, the tightening ring drives the tightening rod to move, and the tightening rod is engaged with the tail of the tail rod of the conical shaft. This structure can be quickly connected, self-pressurized without lock, saves wires, is easy to work at high altitudes, and is convenient to maintain. The live body is completely wrapped with insulating material on the outside, which can effectively reduce the risk of electric shock to people in conventional non-insulating rigs, and is safe and reliable.

[0015] On this basis, the charged body is completely wrapped with insulating material on the outside and each internal connection link has sealing components, which can effectively reduce the risk of electric shock in conventional non-insulated rigs, and has strong prevention and control capabilities for faults caused by falling objects, making it safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural diagram of the present invention; Figure 2 is an exploded view of the present invention; Figure 3 is a cross-sectional view of the present invention; Figure 4 yes Figure 3 A magnified view of middle; Figure 5 It is a schematic diagram of the assembly of the tapered shaft and the wire hole seat; Figure 6 It is the structural diagram of the ontology; Figure 7 It is a schematic diagram of the assembly of the tightening ring and the positioning ring. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0019] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0020] Some embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0021] Reference Figures 1 to 7A pressure-free self-locking integrated closed joint comprises a body 1 installed on a transformer connecting column 4, the body 1 (being a conductor) being composed of a mounting head 2 and a wiring body 3 having a hollow interior, the mounting head 2 being fixedly mounted on the transformer connecting column 4; a wire hole seat 5 is mounted on one end of the wiring body 3 away from the mounting head 2, a conical shaft 7 is mounted in the wiring body 3 for sealing the wire hole of the wire hole seat 5 by a reset spring 6, the conical shaft 7 comprises a conical body 71 and a conical shaft tail rod 72, a portion of an outer wall of the wiring body 3 has a first external thread 301, a tightening ring 9 is threadedly mounted on the wiring body 3 through the first external thread 301, an annular groove 10 is arranged in the tightening ring 9, both ends of the tightening rod 8 extend into the annular groove 10, when the tightening ring 9 is rotated, the tightening ring 9 drives the tightening rod 8 to move, and the tightening rod 8 is abutted against the tail of the conical shaft tail rod 72. The multi-strand wires are inserted from the gap between the wire hole seat and the cone shaft, and rotate back and forth, evenly distributed inside the wiring body, and the cone shaft 7 is pushed by the reset spring 6 to compact the wires. In order to further lock the wires, by rotating the tightening ring 9, the tightening ring drives the tightening rod 8 to move toward the cone shaft 7, and finally the tightening rod 8 and the tail of the cone shaft tail rod 72 are engaged, thereby pushing the cone shaft to move toward the wire insertion hole 52 of the wire hole seat 5, and then further locking the wires. This wiring method realizes quick connection, lock-free self-compression, saves wires, is easy to work at high altitudes, and is convenient for maintenance. Figure 5 The cone 71 of the cone shaft 7 has a first bending angle 73, and correspondingly, the wire hole seat 5 has a second bending angle 51 that matches the first bending angle 73. A wire insertion hole 52 is provided in the wire hole seat 5, and the wire hole seat 5 is provided with a bending angle 51 that matches the bending angle of the cone shaft 7. When the wire passes through, the bending angle forms a bent wire, thereby increasing the tensile strength. The bending angle can be multi-angle, that is, there can be multiple bends. The more bending angles there are, the higher the degree of wire locking will be. The entrance of the wire insertion hole 52 is set to be trumpet-shaped (such as Figure 5 As shown), it is convenient to insert the wire 100.

[0022] A sliding groove 302 for sliding the tightening rod 8 is provided at the part of the tightening ring 9 corresponding to the wiring body 3 in the axial movement range of the wiring body 3. The sliding groove facilitates the smooth sliding of the tightening rod 8. The outer edge of the tightening ring 9 is a polygonal structure, which is convenient for increasing friction when turning the knob.

[0023] One end of the tightening ring 9 is provided with a first internal thread 18 , and the other end of the tightening ring 9 is installed with a positioning ring 11 . The positioning ring 11 and the first internal thread 18 together form an annular groove 10 to prevent the tightening rod 8 from loosening from the annular groove 10 .

[0024] The outer wall of the wiring body 3 near the mounting head 2 is provided with a second external thread 303, and the second external thread 303 is inversely threaded with the first external thread 301. The connecting body 3 is threadedly mounted with the housing 12 through the second external thread 303, and the housing 12 can cover the tightening ring 9. Figure 6It is shown that the cylinder diameter of the external thread 303 is larger than the cylinder diameter of the external thread 301, so that it is convenient for the housing to be inserted into the tightening ring 9. The end of the housing 12 away from the installation head 2 is provided with a sealing portion 13, and a sealing ring 14 is installed inside the sealing portion 13. The outer thread of the sealing portion 13 is installed with a tightening cover 15. After installation, one end of the sealing ring 14 extends out of the sealing portion 13, and the inside of the tightening cover 15 abuts against the sealing ring 14. The sealing ring 14 is provided with a first inclined surface 16, and the tightening cover 15 is provided with a second inclined surface 17 corresponding to the first inclined surface 16. The first inclined surface 16 abuts against the second inclined surface 17. When the knob tightens the cover 15, the first inclined surface 16 is pushed by the second inclined surface 17, so that the sealing ring 14 is squeezed between the tightening cover 15 and the housing 12, so that it is deformed to eliminate the gap between the wire, so as to achieve the purpose of dustproof and waterproof.

[0025] A limiting portion is provided in the sealing portion 13. For example, an inner ring 131 having a diameter smaller than that of the sealing ring 14 is provided in the sealing portion 13. After installation, one end of the sealing ring 14 contacts the end surface of the inner ring 131. When the knob is turned to tighten the cover 15, the sealing ring 14 is squeezed between the tightening cover 15 and the limiting portion, causing it to deform.

[0026] A second internal thread 19 is provided in the tightening cover 15, and a step buckle 20 is provided on the sealing portion 13. The length of the second internal thread 19 is greater than the length of the step buckle 20. When the tightening cover 15 is loosened to the limit, the end surface of the second internal thread 19 abuts against the step buckle 20. Figure 3 As shown, in order to improve the convenience of on-site operation, the tightening cover 15 is pre-installed on the sealing part 13 before leaving the factory, that is, the tightening cover 15 is loosened to the limit, at which time the tightening cover 15 can only be tightened inwards and cannot be screwed outwards.

[0027] The mounting head 2 is sheathed with an outer sheath 21 , one end of the outer sheath 21 close to the transformer connecting column 4 abuts against the transformer connecting column 4 , and the other end of the outer sheath 21 abuts against the end surface of the shell 12 , so that the mounting head 2 achieves a relatively sealed effect.

[0028] The transformer connection column 4 is provided with an installation step, and the outer sheath 21 is provided with a sleeve portion 29 corresponding to the installation step, and the sleeve portion 29 wraps the installation step, and the length of the sleeve portion is slightly longer than the height of the installation step. When the installation head 2 is tightened, the end face of the sleeve portion contacts the transformer connection column 4, and the sleeve portion is squeezed to produce deformation, thereby filling the gap between the transformer connection column 4 and the sleeve portion, thereby achieving a sealing effect. The outer sheath 21 can be made of materials such as insulating rubber.

[0029] A soft gasket 26 is installed between the tightening cover 15 and the housing 12. When the tightening cover 15 is tightened, the soft gasket 26 is squeezed to deform, thereby achieving a sealing effect.

[0030] A mounting column is arranged on the transformer connection column 4, and the mounting head 2 is fixedly connected to the mounting column by means of threads. Two planes are symmetrically arranged on the outer side of the mounting head 2 to facilitate clamping when the knob mounting head 2 is turned.

[0031] The mounting head 2 is provided with symmetrical screw holes and symmetrical through grooves 23. The through grooves 23 divide the screw holes into a nut portion 22 and a threaded portion 24. A screw 25 is installed between the nut portion 22 and the threaded portion 24 to squeeze the through grooves 23 and further squeeze the mounting head 2 against the mounting column, so that the mounting head 2 is tightly connected to the transformer connecting column 4.

[0032] The outer side of the mounting head 2 is symmetrically provided with two planes whose connecting line and the connecting line of the through groove 23 are at a 90° angle. Figure 6 shown.

[0033] A hard gasket 27 is installed between the mounting head 2 and the transformer connection column 4, so that the body 1 will not come into direct contact with the transformer connection column 4, avoid hard contact with the transformer connection column 4, and cause wear. At the same time, it can buffer the impact current generated when the equipment is short-circuited. When leaving the factory, the hard gasket 27 is clamped in the set part. The mounting head 2 and the transformer connection column 4 can be threadedly connected with the transformer connection column 4 through the internal thread 28 of the mounting head 2.

[0034] When leaving the factory, the tightening ring 9 is located at one end of the wiring body 3 close to the installation head 2. At this time, the tightening rod 8 is separated from the tail of the cone shaft tail rod 72. When installing, first install the body on the installation head, then put the shell 12 and the tightening cover 15 on the wire, insert the multi-strand wire 100 from the trumpet mouth of the wire hole seat 5 and push the cone shaft 7 backwards, the spring 6 is compressed, and the wire will enter all from the gap between the cone shaft and the wire hole seat. After entering, rotate the wire back and forth several times, and the multi-strand wire will be evenly distributed and tightly wrapped around the inner wall of the body. Then turn the knob tightening ring 9 to drive the tightening rod 8 to slide in the direction of the cone shaft 7, and then push the cone shaft 7 to reduce the gap between the cone shaft 7 and the wire hole seat 5, thereby further locking the wire. Then rotate the shell 12 to cover the outside of the body. In order to avoid the action of inserting the shell 12 to affect the tightening ring 9, the first external thread 301 and the second external thread 303 on the connector 3 are reverse teeth.

[0035] In addition to the advantages of quick connection, pressure-free, and safe operation, the present invention is also beautiful as a whole. The charged body is completely wrapped with insulating material on the outside, and each internal connection link has sealing components, which can effectively reduce the risk of electric shock to people in conventional non-insulated stands. It has strong prevention and control capabilities for faults caused by falling objects, and is safe and reliable.

[0036] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] It should be noted that when an element is referred to as being "assembled on", "installed on", "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0038] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pressure-free self-locking integrated closed joint, comprising a body (1) mounted on a transformer connection column (4), Features The main body (1) is composed of a mounting head (2) and a wiring body (3) with a hollow interior, wherein the mounting head (2) is fixedly mounted on the transformer connecting column (4); a wire hole seat (5) is mounted on one end of the wiring body (3) away from the mounting head (2); a conical shaft (7) is mounted in the wiring body (3) and is reset by a reset spring (6) to seal the wire insertion hole of the wire hole seat (5); the conical shaft (7) comprises a cone (71) and a conical shaft tail rod (72); two ends of the conical shaft (71) extending out of the wiring body (3) are slidably mounted on the wiring body (3); A tightening rod (8) is disposed outside the wiring body (3), a portion of the outer wall of the wiring body (3) has a first external thread (301), a tightening ring (9) is threadedly mounted on the wiring body (3) through the first external thread (301), an annular groove (10) is provided inside the tightening ring (9), both ends of the tightening rod (8) extend into the annular groove (10), and when the tightening ring (9) is rotated, the tightening ring (9) drives the tightening rod (8) to move, so that the tightening rod (8) abuts against the tail of the tapered shaft tail rod (72).

2. The pressure-free self-locking integrated closed joint according to claim 1, Features A sliding groove (302) for the tightening rod (8) to slide is provided at a position of the tightening ring (9) corresponding to the connecting body (3) in the range of axial movement of the connecting body (3).

3. The pressure-free self-locking integrated closed joint according to claim 1, Features The portion where the cone (71) of the cone shaft (7) contacts the wire hole seat (5) has a first bending angle (73), and correspondingly, the wire hole seat (5) has a second bending angle (51) matching the first bending angle (73).

4. The pressure-free self-locking integrated closed joint according to claim 1, Features One end of the tightening ring (9) is provided with a first internal thread (18), and the other end of the tightening ring (9) is provided with a positioning ring (11), wherein the positioning ring (11) and the first internal thread (18) together form the annular groove (10).

5. The pressure-free self-locking integrated closed joint according to claim 1, Features The outer wall of the wiring body (3) close to the mounting head (2) is provided with a second external thread (303), the second external thread (303) and the first external thread (301) being reverse threads, the connecting body (3) being threadedly mounted with a housing (12) via the second external thread (303), the housing (12) being capable of sheathing the tightening ring (9), the housing (12) being provided with a sealing portion (13) at one end away from the mounting head (2), a sealing ring (14) being mounted inside the sealing portion (13), a tightening cover (15) being threadedly mounted on the outer wall of the sealing portion (13), and after mounting, one end of the sealing ring (14) protrudes out of the sealing portion (13), and the inside of the tightening cover (15) is in contact with the sealing ring (14).

6. The pressure-free self-locking integrated closed joint according to claim 5, Features The sealing ring (14) is provided with a first inclined surface (16), and the tightening cover (15) is provided with a second inclined surface (17) corresponding to the first inclined surface (16), and the first inclined surface (16) and the second inclined surface (17) are in contact with each other.

7. The pressure-free self-locking integrated closed joint according to claim 5, Features The tightening cover (15) is provided with a second internal thread (19), and the sealing portion (13) is provided with a step buckle (20). The length of the second internal thread (19) is greater than the length of the step buckle (20). When the tightening cover (15) is loosened to the limit, the end surface of the second internal thread (19) abuts against the step buckle (20).

8. The pressure-free self-locking integrated closed joint according to claim 5, Features A soft gasket (26) is installed between the tightening cover (15) and the outer shell (12).

9. The pressure-free self-locking integrated closed joint according to claim 5, Features An outer sheath (21) is sheathed on the mounting head (2); one end of the outer sheath (21) close to the transformer connection column (4) abuts against the transformer connection column (4); the other end of the outer sheath (21) abuts against the end surface of the housing (12); and a hard gasket (27) is installed between the mounting head (2) and the transformer connection column (4).

10. The pressure-free self-locking integrated closed joint according to claim 1, Features The mounting head (2) is provided with symmetrical screw holes, and the mounting head (2) is provided with symmetrical through grooves (23), the through grooves (23) dividing the screw holes into a nut portion (22) and a threaded portion (24), and a screw (25) is installed between the nut portion (22) and the threaded portion (24) to press the through grooves (23).

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