A locking device applied to the intermediate joint of the extension cable of TSI system

Abstract

The utility model discloses a locking device applied to TSI system extension cable intermediate joint, include: male end subassembly, including integrative first hollow thread section and first hollow connecting section, the outer surface of first hollow thread section is equipped with first thread structure, and is equipped with first perforation on first hollow connecting section, female end subassembly, including integrative second hollow thread section and second hollow connecting section, the inner surface of second hollow thread section is equipped with second thread structure with first thread structure, and is equipped with second perforation on second hollow connecting section, first fixed part and second fixed part, both respectively correspond to first perforation and second perforation, for fixed cable of inserting male end subassembly and female end subassembly inside, the utility model discloses the radial constraint mechanism of thread engagement locking structure and fixed part of male end subassembly and female end subassembly, lock and fix to extension cable intermediate joint, effectively prevent the phenomenon of poor contact caused by joint ageing, loosening.

Description

Technical Field

[0001] This utility model relates to the technical field of power plant turbine monitoring equipment, specifically to a locking device for intermediate joints of extension cables in TSI systems. Background Technology

[0002] The Turbine Supervisory Instrumentation (TSI) system is a critical system in generator sets used for real-time monitoring of the turbine's operating status. In the TSI system, sensors are connected to the preamplifier via extension cables. The cable connectors are designed as plug-and-play joints, lacking a locking function. However, during long-term operation, especially under harsh environmental conditions (such as the axial displacement monitoring points in the front bearing housing being subjected to prolonged lubricating oil erosion and high temperatures), the extension cable connectors are prone to aging and loosening, leading to poor contact and abnormal signals, and even triggering malfunctions in unit protection systems, seriously threatening the safe and stable operation of the unit.

[0003] In existing technologies, temporary fixing of intermediate joints by binding is often used to solve the problem of poor contact. However, this method cannot withstand long-term mechanical stress and environmental corrosion, resulting in repeated failures. On the other hand, given the large number of sensors in the TSI system, their high cost, and the fact that the sensors and preamplifier themselves are functioning normally while only the intermediate joint is faulty, replacing the entire sensor system would be too costly and uneconomical.

[0004] Therefore, the reliability defects of the intermediate joints of the extension cables in the current TSI system have become a technical bottleneck that urgently needs to be solved. Summary of the Invention

[0005] The purpose of this utility model is to at least partially address the shortcomings of the existing technology, thereby proposing a locking device for intermediate joints of extension cables in TSI systems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a locking device for intermediate joints of extension cables in TSI systems, comprising:

[0008] The male end component includes an integrally formed first hollow threaded section and a first hollow connecting section. The outer surface of the first hollow threaded section is provided with a first thread structure, and the first hollow connecting section is provided with a first through hole.

[0009] The female end assembly includes an integrally formed second hollow threaded section and a second hollow connecting section. The inner surface of the second hollow threaded section is provided with a second threaded structure corresponding to the first threaded structure, and the second hollow connecting section is provided with a second through hole.

[0010] The first fixing member and the second fixing member, respectively corresponding to the first through hole and the second through hole, are used to fix the cable inserted into the inside of the male end assembly and the female end assembly.

[0011] In an optional implementation, it further includes:

[0012] The first sealing element is used to seal the opening of the first hollow connecting section that is away from the first hollow threaded section;

[0013] The second seal is used to seal the opening of the second hollow connecting section that is away from the second hollow threaded section.

[0014] In one optional embodiment, both the first seal and the second seal are rubber sealing sleeves.

[0015] In one optional implementation, the length of the first threaded structure is greater than the length of the first hollow connecting section;

[0016] The length of the second threaded structure is greater than the length of the second hollow connecting section;

[0017] The length of the first thread structure is the same as the length of the second thread structure.

[0018] In one optional embodiment, there are multiple first perforations, and each first perforation is evenly distributed at equal angles along the circumferential direction of the first hollow connecting section.

[0019] The second perforation is provided in multiple ways, and each second perforation is evenly distributed at equal angles along the circumferential direction of the second hollow connecting section.

[0020] In an optional embodiment, both the first through hole and the second through hole are threaded holes, and both the first fastener and the second fastener include a plurality of screw structures corresponding to the threaded holes.

[0021] In one optional implementation, both the male end component and the female end component are hollow stepped cylinders.

[0022] The beneficial effects of the embodiments provided by this utility model include:

[0023] This utility model uses the threaded engagement locking structure of the male and female end components and the radial constraint mechanism of the fixing parts to lock and fix the intermediate joint of the extension cable, effectively preventing poor contact caused by joint aging and loosening. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0025] Figure 1 A front sectional view of the locking device in an embodiment of this specification is shown;

[0026] Figure 2 A right-side cross-sectional view of the male terminal component in an embodiment of this specification is shown;

[0027] Figure 3 A schematic diagram of the intermediate joint in an embodiment of this specification is shown;

[0028] Figure 4 This specification shows a three-dimensional schematic diagram of the locking device after it is fully engaged in an embodiment of this specification;

[0029] Wherein, 1 is the male end assembly; 101 is the first hollow threaded section; 102 is the first hollow connecting section; 103 is the first through hole; 104 is the first fixing member; 2 is the female end assembly; 201 is the second hollow threaded section; 202 is the second hollow connecting section; 203 is the second through hole; 204 is the second fixing member; 3 is the first sealing member; 301 is the interface end; 302 is the cable end; 4 is the second sealing member; and 5 is the cable. Detailed Implementation

[0030] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

[0031] The TSI system mainly consists of sensors, a preamplifier, and monitoring instruments. Sensors (such as vibration sensors, displacement sensors, and speed sensors) collect turbine operating parameters and convert them into electrical signals. The preamplifier receives the sensor signals, amplifies and filters them, and converts them into signals suitable for transmission before sending them to the monitoring instruments or control system. The monitoring instruments display, analyze, process, store, and alarm the signals. The sensors and preamplifier are connected via extension cables. These cables typically have plug-in, non-locking intermediate connectors at both ends. However, due to long-term operation and harsh environments (such as lubricating oil erosion in the front bearing housing and high temperatures), these connectors are prone to aging and loosening, leading to poor contact, inaccurate measurements, and even malfunctions of unit protection systems, threatening unit safety. Previously, binding was used to address loose connectors, but this method had limited effectiveness and was prone to recurrence. Given the large number of sensors in the TSI system, the high cost of replacement (a single sensor typically costs over 20,000 yuan), and the fact that the sensors and preamplifier themselves are functioning normally, the problem mainly lies in poor contact at the extension cable intermediate connectors.

[0032] The technical solution of the present invention will be described in detail below with reference to specific embodiments.

[0033] Example 1

[0034] like Figure 1 As shown, this embodiment discloses a locking device for a TSI system extension cable intermediate joint, including a male end assembly 1, a female end assembly 2, a first fixing member 104, and a second fixing member 204;

[0035] For example, the male end component 1 includes an integrally formed first hollow threaded section 101 and a first hollow connecting section 102. The outer surface of the first hollow threaded section 101 is provided with a first thread structure, and the first hollow connecting section 102 is provided with a first through hole 103.

[0036] The female end assembly 2 includes an integrally formed second hollow threaded section 201 and a second hollow connecting section 202. The inner surface of the second hollow threaded section 201 is provided with a second threaded structure corresponding to the first threaded structure, and the second hollow connecting section 202 is provided with a second through hole 203.

[0037] The first fixing member 104 and the second fixing member 204 correspond to the first through hole 103 and the second through hole 203, respectively, and are used to fix the cable 5 inserted into the inner side of the male end assembly 1 and the female end assembly 2.

[0038] In some embodiments, the locking device further includes a first seal 3 and a second seal 4;

[0039] The first sealing element 3 is disposed at the opening of the first hollow connecting section 102 away from the opening of the first hollow threaded section 101, so as to seal the opening and cover the cable 5; the second sealing element 4 is disposed at the opening of the second hollow connecting section 202 away from the opening of the second hollow threaded section 201, so as to seal the opening and cover the cable 5.

[0040] In this embodiment, both the first sealing element 3 and the second sealing element 4 include a cylindrical interface end 301 and a hemispherical cable end 302. A cable through hole is opened in the center of the cable end 302. Both the interface end 301 and the inner wall of the cable through hole are provided with an annular anti-slip structure.

[0041] The interface end 301 of the first sealing member 3 is sleeved on the outside of the first hollow connecting section 102 of the male end assembly 1, and the interface end 301 of the second sealing member 4 is sleeved on the outside of the second hollow connecting section 202 of the female end assembly 2.

[0042] Both the first seal 3 and the second seal 4 are made of high-temperature resistant and wear-resistant silicone rubber to enhance friction without damaging the cable 5 and the connector.

[0043] In some embodiments, the length of the first threaded structure is greater than the length of the first hollow connecting section 102; the length of the second threaded structure is greater than the length of the second hollow connecting section 202; the length of the first threaded structure is the same as the length of the second threaded structure.

[0044] In this embodiment, both the male end component 1 and the female end component 2 are hollow stepped cylinders with a length of 25mm, an outer diameter of 16mm, and an inner diameter of 8mm; the external thread of the first hollow threaded section 101 and the internal thread of the second hollow threaded section 201 are both M16*1.25 and have a thread length of 16mm.

[0045] Both male terminal component 1 and female terminal component 2 are made of high-strength, lightweight aluminum alloy material to ensure mechanical strength and environmental adaptability.

[0046] In some embodiments, there are multiple first perforations 103, and each first perforation 103 is evenly distributed at equal angles in the circumferential direction of the first hollow connecting section 102; there are multiple second perforations 203, and each second perforation 203 is evenly distributed at equal angles in the circumferential direction of the second hollow connecting section 202.

[0047] In some embodiments, the first through hole 103 and the second through hole 203 are both threaded holes, and the first fastener 104 and the second fastener 204 both include a plurality of screw structures corresponding to the threaded holes.

[0048] It should be noted that the locking device in this embodiment is not only applicable to the TSI system, but also to;

[0049] This embodiment reliably locks and fixes the intermediate joint of the extension cable through the threaded engagement locking structure of the male end component 1 and the female end component 2 and the radial constraint mechanism of the fixing component. This effectively prevents poor contact caused by joint aging and loosening, significantly improves the accuracy and reliability of the TSI system measurement signal, and fundamentally avoids the unit protection malfunction caused by measurement inaccuracy, thereby strongly ensuring the safe and stable operation of the unit.

[0050] This embodiment specifically addresses the reliability issue of the intermediate joint, a vulnerable point, avoiding the need to frequently replace the entire sensor set or extension cable 5 due to poor joint contact, significantly reducing equipment maintenance and replacement costs; at the same time, the device is easy to install and operate, requiring no complicated temporary treatment such as binding, effectively reducing the labor intensity of maintenance personnel.

[0051] The working principle and process of this embodiment are described as follows:

[0052] During installation, first, put the male end component 1 onto the extension cable 5 at one end of the intermediate connector, and put the female end component 2 onto the extension cable 5 at the other end of the intermediate connector. After cleaning the mating surface of the intermediate connector, complete the insertion of the intermediate connector. Move the male end component 1 and the female end component 2 to both sides of the intermediate connector so that the first thread structure of the male end component 1 is opposite to the second thread structure of the female end component 2.

[0053] Rotate the male end assembly 1 and / or the female end assembly 2 to engage the first threaded structure with the second threaded structure. Screw until the threads are fully engaged, generating axial clamping force to ensure a tight and reliable connection of the intermediate joint. Screw the first fixing member 104 into the first through hole 103 to lock and fix the male end assembly 1 onto its corresponding cable 5. Screw the second fixing member 204 into the second through hole 203 to lock and fix the female end assembly 2 onto its corresponding cable 5. Finally, adjust the first sealing member 3 and the second sealing member 4 to completely cover the connection between the cable 5 and the male end assembly 1 or the female end assembly 2, providing protection.

[0054] In summary, the above embodiments do not involve the formulation of strategies or the improvement of methods.

[0055] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A locking device for intermediate joints of extension cables in TSI systems, characterized in that, include: The male end component includes an integrally formed first hollow threaded section and a first hollow connecting section. The outer surface of the first hollow threaded section is provided with a first thread structure, and the first hollow connecting section is provided with a first through hole. The female end assembly includes an integrally formed second hollow threaded section and a second hollow connecting section. The inner surface of the second hollow threaded section is provided with a second threaded structure corresponding to the first threaded structure, and the second hollow connecting section is provided with a second through hole. The first fixing member and the second fixing member, respectively corresponding to the first through hole and the second through hole, are used to fix the cable inserted into the inside of the male end assembly and the female end assembly.

2. The locking device according to claim 1, characterized in that, Also includes: The first sealing element is used to seal the opening of the first hollow connecting section that is away from the first hollow threaded section; The second seal is used to seal the opening of the second hollow connecting section that is away from the second hollow threaded section.

3. The locking device according to claim 2, characterized in that, Both the first and second seals are rubber sealing sleeves.

4. The locking device according to claim 1, characterized in that, The length of the first threaded structure is greater than the length of the first hollow connecting section; The length of the second threaded structure is greater than the length of the second hollow connecting section; The length of the first thread structure is the same as the length of the second thread structure.

5. The locking device according to claim 1, characterized in that, The first perforation is provided in multiple ways, and each first perforation is evenly distributed at equal angles along the circumferential direction of the first hollow connecting section; The second perforation is provided in multiple ways, and each second perforation is evenly distributed at equal angles along the circumferential direction of the second hollow connecting section.

6. The locking device according to claim 1 or 5, characterized in that, Both the first through hole and the second through hole are threaded holes, and both the first fastener and the second fastener include multiple screw structures corresponding to the threaded holes.

7. The locking device according to claim 1, characterized in that, Both the male end component and the female end component are hollow stepped cylinders.

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