A connecting device for a lead plug and a cable sleeve

Abstract

The present invention provides a connection device for a lead plug and a cable sleeve, including a valve body. One side of the valve body is detachably connected to a lead aviation plug. A cable is inserted through the middle of the lead aviation plug, and the cable is detachably connected to the valve body. The other end of the cable penetrates through the cable sleeve, and the cable sleeve and the lead aviation plug are detachably connected through a connection component. By providing the connection component, the present invention effectively prevents the spiral connection between the cable sleeve and the lead aviation plug, thereby avoiding abnormal phenomena such as detachment, cable rubbing, and wear during use.

Description

Technical Field

[0001] The present invention relates to the field of digital electro - hydraulic control of industrial production steam turbines, and particularly to a connecting device for a lead plug and a cable sleeve. Background Art

[0002] Currently, the main function of the electro - hydraulic converter control (DEH) valve in industrial production steam turbines is that it receives the output power and speed signals of the turbogenerator from the distributed control system (DCS) to change the opening of the governing valves, thereby closed - loop controlling the speed and output power (i.e., load) of the turbogenerator. The lead - wire connection method of this electro - hydraulic converter control valve for steam turbines is that the leads are welded to the pins inside the aviation plug and connected to a special socket, and there is usually no protective sleeve or protection and locking device outside.

[0003] With the increase in the service life of the equipment and wear caused by vibration during the operation of the steam turbine, loosening of the connection part of the aviation lead plug and damage to the control cable often occur. In severe cases, even the welding part inside the aviation plug breaks, the lead connection is interrupted, resulting in the technical problem of an instant valve - closing accident. Summary of the Invention

[0004] The present invention mainly provides a connecting device for a lead plug and a cable sleeve to solve the technical problems mentioned in the above background art, that is, with the increase in the service life of the equipment and wear caused by vibration during the operation of the steam turbine, loosening of the connection part of the aviation lead plug and damage to the control cable often occur. In severe cases, even the welding part inside the aviation plug breaks, the lead connection is interrupted, resulting in an instant valve - closing accident.

[0005] The technical solution adopted by the present invention to solve the above - mentioned technical problems is as follows: A connecting device for a lead plug and a cable sleeve, including a valve body, one side of the valve body is detachably connected to a lead aviation plug, a cable is inserted through the middle of the lead aviation plug, and the cable is detachably connected to the valve body;

[0006] The other end of the cable passes through a cable sleeve, and the cable sleeve is detachably connected to the lead aviation plug through a connection component.

[0007] Furthermore, there are reinforcing ribs on the outer side of the cable sleeve, and the reinforcing ribs are arranged in a spiral shape.

[0008] Further, the connection assembly includes a connecting pipe. The lead aviation plug is provided with a tubular joint, and the connecting pipe is slidably connected to the tubular joint. One end of the outer side of the lead aviation plug is detachably connected to a first positioning disc, and the outer side of the connecting pipe is detachably connected to a second positioning disc. The first positioning disc and the second positioning disc are fixed by bolts. One end of the connecting pipe is detachably connected to a positioning nut. One end of the cable sleeve is welded to a threaded cable sleeve, and the internal threaded cable sleeve is spirally connected to the positioning nut.

[0009] Further, the positioning nut is formed by fixing a ring and an internal threaded pipe, and the inner wall of the internal threaded pipe is threadedly connected to the external threaded structure at one end of the threaded cable sleeve.

[0010] Further, the connection assembly is made of SUS304 stainless steel material with greater hardness and better toughness, and the bolt material is an M2*4 galvanized bolt.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] By detachably connecting a connection assembly to one end of the lead aviation plug and using the connection assembly to detachably connect the cable sleeve, the present invention realizes the detachable connection between the cable sleeve and the lead aviation plug. A protection and fixing device is added between the aviation lead plug and the standard cable sleeve, effectively preventing abnormal phenomena such as the loosening of the aviation lead plug, cable rubbing, and wear during operation, especially preventing accidents of control system failure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 is a schematic diagram of the existing structure of the present invention;

[0015] Figure 3 is a schematic structural diagram of the connection assembly of the present invention.

[0016] In the figure: 1, valve body; 2, lead aviation plug; 21, tubular joint; 22, first positioning disc; 3, cable; 4, cable sleeve; 41, reinforcing rib; 5, connection assembly; 51, connecting pipe; 52, second positioning disc; 53, bolt; 54, cable sleeve; 55, threaded cable sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0018] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the specification of this invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0020] For the embodiments, please refer to the attached Figures 1 - 3 , a connecting device for a lead plug and a cable sleeve, comprising a valve body 1, one side of the valve body 1 is detachably connected to a lead aviation plug 2, a cable 3 is inserted through the middle of the lead aviation plug 2, and the cable 3 is detachably connected to the valve body 1;

[0021] The other end of the cable 3 penetrates through a cable sleeve 4, the cable sleeve 4 is detachably connected to the lead aviation plug 2 through a connecting component 5, and reinforcing ribs 41 are arranged on the outer side of the cable sleeve 4, and the reinforcing ribs 41 are arranged in a spiral shape. The cable sleeve 4 is detachably connected to the lead aviation plug 2 through the connecting component 5. By using the connecting component 5, a protection and fixing device is added between the aviation lead plug and the standard cable sleeve, effectively preventing abnormal phenomena such as loosening of the aviation lead plug, rubbing and abrasion of the cable during operation, and especially preventing accidents of control system failure.

[0022] For the embodiments, please refer to the attached Figure 3 , the connecting component 5 includes a connecting pipe 51, the lead aviation plug 2 is provided with a tubular joint 21, the connecting pipe 51 is slidably connected to the tubular joint 21, one end of the outer side of the lead aviation plug 2 is detachably connected to a first positioning disc 22, the outer side of the connecting pipe 51 is detachably connected to a second positioning disc 52, the first positioning disc 22 and the second positioning disc 52 are fixed by bolts 53, one end of the connecting pipe 51 is detachably connected to a positioning nut 54, one end of the cable sleeve 4 is welded to a threaded cable sleeve 55, and the threaded cable sleeve 55 is screwed to the positioning nut 54. The positioning nut 54 is formed by fixing a ring and an internal threaded pipe, and the inner wall of the internal threaded pipe is threadedly connected to the external threaded structure at one end of the threaded cable sleeve 55.

[0023] Operation principle: First, the lead aviation plug is detachably connected on one side of the valve body 1. A first positioning plate is provided at one end of the lead aviation plug. The tubular joint is first slid through the connecting pipe, and the first positioning plate is connected to the second positioning plate by bolts, and the M2*4 galvanized bolts are used. The connecting device is made of SUS304 stainless steel.

[0024] The cable passes through the middle thereof. At the same time, a positioning nut is provided at one end of the connecting tube. The middle part of the positioning bolt is spirally connected to the external thread structure at one end of the threaded cable sleeve 55 to form a fixation. At the same time, one side of the threaded cable sleeve 55 is welded and connected to the cable sleeve to form an overall fixation.

[0025] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A connecting device for a lead plug and a cable sleeve, comprising a valve body (1), characterized in that: One side of the valve body (1) is detachably connected to a lead aviation plug (2). A cable (3) is inserted through the middle of the lead aviation plug (2), and the cable (3) is detachably connected to the valve body (1). The other end of the cable (3) penetrates through a cable sleeve (4), and the cable sleeve (4) is detachably connected to the lead aviation plug (2) through a connection assembly (5). The connection assembly (5) includes a connecting pipe (51). The lead aviation plug (2) is provided with a tubular joint (21). The connecting pipe (51) is slidably connected to the tubular joint (21). One end of the outer side of the lead aviation plug (2) is detachably connected to a first positioning disc (22). The outer side of the connecting pipe (51) is detachably connected to a second positioning disc (52). The first positioning disc (22) and the second positioning disc (52) are fixed by bolts (53). One end of the connecting pipe (51) is detachably connected to a positioning nut (54). One end of the cable sleeve (4) is welded to a threaded cable sleeve (55), and the threaded cable sleeve (55) is screwed to the positioning nut (54). The positioning nut (54) is formed by fixing a ring and an internal threaded pipe, and the inner wall of the internal threaded pipe is threadedly connected to the external threaded structure at one end of the threaded cable sleeve (55). The connection assembly is made of SUS304 stainless steel material with greater hardness and better toughness, and the bolts are M2*4 galvanized bolts.

2. The connecting device for a lead plug and a cable sleeve according to claim 1, characterized in that: Reinforcing ribs (41) are arranged on the outer side of the cable sleeve (4), and the reinforcing ribs (41) are arranged in a spiral shape.

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