A connection device for a spigot and a snake skin sleeve

Abstract

The utility model discloses a kind of connecting device of gran head and snake skin sleeve, including with the upper joint of gran head connection, for the intermediate connecting component of snake skin sleeve sleeve connection, elastic sealing element and lower joint that sleeve in snake skin sleeve outside, the intermediate connecting component is connected with the upper joint, the elastic sealing element is placed between the intermediate connecting piece with the lower joint, the lower joint is screwed with the intermediate connecting component;The lower joint is screwed into the intermediate connecting component then extrudes the elastic sealing element to make the elastic sealing element and the snake skin sleeve extrusion fixed, the lower joint is unscrewed from the intermediate connecting component then loosen the elastic sealing element to make the elastic sealing element reduce pressure relative to the snake skin sleeve. Through the connecting device of gran head and snake skin sleeve, the effective fixation of gran head and snake skin sleeve can be realized.

Description

Technical Field

[0001] This utility model relates to the field of cable protection and connection technology, and in particular to a connection device between a gland head and a braided sleeve. Background Technology

[0002] In nuclear power plants, it is common for instrument cables to be connected to positioners, solenoid valves, and control boxes. To prevent damage to the cable sheath, metal protective sleeves are usually installed for protection. However, there are problems on site where the metal protective sleeves are not compatible with the positioners, solenoid valves, and control box glands, making it impossible to lock the metal protective sleeves tightly. As a result, the metal protective sleeves pull on the cables and cause stress. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a connection device between the gland head and the snakeskin sleeve.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a connection device for a gland head and a braided sleeve, including an upper connector connected to the gland head, an intermediate connecting component for the braided sleeve to be fitted, an elastic sealing element fitted outside the braided sleeve, and a lower connector. The intermediate connecting component is connected to the upper connector, the elastic sealing element is placed between the intermediate connecting component and the lower connector, and the lower connector is screwed to the intermediate connecting component.

[0005] When the lower connector is screwed into the intermediate connecting assembly, it compresses the elastic seal, causing the elastic seal to be pressed and fixed against the snakeskin sleeve. When the lower connector is screwed out of the intermediate connecting assembly, it loosens the elastic seal, reducing the pressure of the elastic seal relative to the snakeskin sleeve.

[0006] In some embodiments, the intermediate connecting assembly includes a first connector, a second connector, and a third connector. The first connector is sleeved on the upper connector, the second connector is connected to the first connector and screwed to the lower connector, and the third connector is placed inside the second connector and abuts against the second connector.

[0007] In some embodiments, the third connector includes a positioning section, a transition section, and a snap-fit ​​section for the snakeskin sleeve to be fitted onto. The transition section is connected to the positioning section and the snap-fit ​​section respectively. The positioning section is inserted into the second connector, and the snap-fit ​​section is inserted into the elastic seal.

[0008] In some embodiments, the end of the positioning segment near the second connector is connected to the snap-fit ​​segment via the transition segment, and a gap greater than the thickness of the sidewall of the snakeskin sleeve is left between the positioning segment and the snap-fit ​​segment.

[0009] In some embodiments, the snap-fit ​​section is a cylindrical body with an outer diameter the same as the inner diameter of the snakeskin sleeve, and the end of the snap-fit ​​section away from the positioning section is provided with an avoidance notch for the snakeskin sleeve to be screwed in.

[0010] In some embodiments, the upper connector sequentially includes a first connector section matching the inner diameter of the gland, a first drive section for tool connection, a second connector section screwed to the first connector, and an elastic structure for clamping the cable passing through the snakeskin sleeve. The first connector section is provided with an external thread matching the gland, and the second connector section is provided with an external thread matching the first connector.

[0011] In some embodiments, the elastic structure is a toothed structure, including a plurality of toothed racks, the plurality of toothed racks being integrally formed with the second connector segment.

[0012] In some embodiments, the first connector sequentially includes a first threaded segment with internal threads, a second drive segment for tool connection, and a second threaded segment with internal threads. The internal threads of the first threaded segment match the external threads of the second connector segment, and the first threaded segment is screwed to the second connector segment; the second threaded segment is screwed to the second connector.

[0013] In some embodiments, the second connector includes a third threaded segment with external threads, a third drive segment for tool connection, and a fourth threaded segment with external threads. The external threads of the third threaded segment match the internal threads of the second threaded segment. The fourth threaded segment is screwed to the lower connector, and the fourth threaded segment has an internal through hole with an inner diameter greater than or equal to the outer diameter of the third connector.

[0014] In some embodiments, the lower connector includes a connector body, a plurality of connecting portions for tool connection, and a blocking portion to prevent the elastic seal from dislodging. The plurality of connecting portions are symmetrically disposed on the outer wall of the connector body, and the blocking portion is disposed at the end of the connector body away from the third connector. The connector body is provided with an internal thread that matches the third connector.

[0015] By implementing this utility model, the following beneficial effects can be achieved:

[0016] This utility model discloses a connection device for a gland head and a braided sleeve, comprising an upper connector connected to the gland head, an intermediate connecting assembly for the braided sleeve to be fitted, an elastic sealing element fitted over the braided sleeve, and a lower connector. The intermediate connecting assembly is connected to the upper connector, the elastic sealing element is placed between the intermediate connecting assembly and the lower connector, and the lower connector is screwed to the intermediate connecting assembly. When the lower connector is screwed into the intermediate connecting assembly, it compresses the elastic sealing element, thus fixing the elastic sealing element to the braided sleeve. When the lower connector is screwed out of the intermediate connecting assembly, it loosens the elastic sealing element, thus reducing the pressure of the elastic sealing element relative to the braided sleeve. This connection device effectively secures the gland head and the braided sleeve. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the connection device between the gland head and the snakeskin sleeve according to one embodiment of the present invention;

[0019] Figure 2 yes Figure 1 An exploded view of the connection device between the gland head and the snakeskin sleeve. Detailed Implementation

[0020] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] See Figure 1 and Figure 2 One embodiment of this utility model discloses a connection device for a gland head and a braided sleeve, generally used in nuclear power plants to fix the gland head and the braided sleeve when connecting cables to positioners, solenoid valves, and control boxes. The braided sleeve is a metal sleeve. The connection device includes an upper connector 1 connected to the gland head, an intermediate connecting assembly 2 for the braided sleeve to be fitted, an elastic sealing element 3 fitted over the braided sleeve, and a lower connector 4. The intermediate connecting assembly 2 is connected to the upper connector 1. The elastic sealing element 3 is placed between the intermediate connecting assembly 2 and the lower connector 4, and the lower connector 4 is screwed to the intermediate connecting assembly 2. Screwing the lower connector 4 into the intermediate connecting assembly 2 compresses the elastic sealing element 3, fixing it to the braided sleeve. Screwing the lower connector 4 out of the intermediate connecting assembly 2 loosens the elastic sealing element 3, reducing the pressure on the braided sleeve.

[0025] Generally, the upper connector 1 is used for connection and fixation with the gland head, and can be a threaded connection. The size of the upper connector 1 matches the size of the gland head. The intermediate connector, the elastic seal 3, and the lower connector 4 cooperate with each other to connect and fix with the braided sleeve. The size of the intermediate connector matches the size of the braided sleeve, and the elastic range of the elastic seal 3 matches the size of the braided sleeve. This can achieve a fixed connection between the gland head and the braided sleeve, meeting the fixing requirements of the gland head and the braided sleeve when connecting cables to positioners, solenoid valves, and control boxes in nuclear power plants, and preventing situations where mismatch between the gland head and the braided sleeve leads to the braided sleeve pulling on the cable and causing stress.

[0026] In some embodiments, the intermediate connecting assembly 2 includes a first connecting member 21, a second connecting member 22, and a third connecting member 23. The first connecting member 21 is sleeved on the upper connector 1, the second connecting member 22 is connected to the first connecting member 21 and screwed to the lower connector 4, and the third connecting member 23 is placed inside the second connecting member 22 and abuts against the second connecting member 22. The third connecting member 23 and the second connecting member 22 can be non-detachable, such as by welding; or they can be detachable, such as by snap-fit ​​or screwing; or the third connecting member 23 can simply be placed inside the second connecting member 22. The outer diameter of the third connecting member 23 is slightly smaller than the inner diameter of the second connecting member 22 to prevent displacement.

[0027] In some embodiments, the third connector 23 includes a positioning section 231, a transition section, and a snap-fit ​​section 232 for attaching to a flexible sleeve. The transition section is connected to both the positioning section 231 and the snap-fit ​​section 232. The positioning section 231 is inserted into the second connector 22, and the snap-fit ​​section 232 is inserted into the elastic seal 3. The dimensions of the positioning section 231 match the dimensions of the second connector 22, the dimensions of the snap-fit ​​section 232 match the dimensions of the flexible sleeve, and the transition section is used for dimensional transition. The transition section is obscured and not shown in the figure.

[0028] In some embodiments, the end of the positioning segment 231 near the second connector 22 is connected to the snap-fit ​​segment 232 via a transition segment, and a gap larger than the thickness of the sidewall of the braided sleeve is left between the positioning segment 231 and the snap-fit ​​segment 232. This gap allows the braided sleeve to pass through. Understandably, in other embodiments, the length of the snap-fit ​​segment 232 is extended to meet the required length for the braided sleeve to be inserted and fixed, and the positioning segment 231 may also be connected to the snap-fit ​​segment 232 via a transition segment at the end furthest from the second connector 22.

[0029] In some embodiments, the snap-fit ​​section 232 is a cylindrical body with an outer diameter the same as the inner diameter of the braided sleeve, and the end of the snap-fit ​​section 232 away from the positioning section 231 is provided with a clearance notch for the braided sleeve to be screwed in. The end of the snap-fit ​​section 232 away from the positioning section 231 is inclined, and the clearance notch is arc-shaped, which can better adapt to the end interface of the braided sleeve.

[0030] In some embodiments, the upper connector 1 sequentially includes a first connector section 11 matching the inner diameter of the gland, a first drive section 12 for tool connection, a second connector section 13 screwed to the first connector 21, and an elastic structure 14 for clamping the cable passing through the braided sleeve. The first connector section 11 has an external thread matching the gland, and the second connector section 13 has an external thread matching the first connector 21. Specifically, the first connector section 11 is used to connect the gland, and its size matches the gland. The first drive section 12 is used to connect tools such as wrenches or sockets, and can be a square head or hexagonal head. The second connector section 13 is used to connect to the first connector 21, has an external thread, and its size matches the first connector 21. The elastic structure 14 is used to fix the cable inside the braided sleeve, and elastic engagement with the cable is achieved by tightening the second connector section 13 with the first connector 21.

[0031] In some embodiments, the elastic structure 14 is a toothed structure, including a plurality of racks, which are integrally formed with the second connector section 13. The free ends of the racks are rounded to prevent scratching the cable.

[0032] In some embodiments, the first connector 21 sequentially includes a first threaded section 211 with internal threads, a second drive section 212 for tool connection, and a second threaded section 213 with internal threads. The internal thread of the first threaded section 211 matches the external thread of the second connector section 13, and the first threaded section 211 is screwed to the second connector section 13; the second threaded section 213 is screwed to the second connector 22. The first threaded section 211 is used for connection to the second connector section 13. The second drive section 212 is used for connection to tools such as wrenches, sockets, etc., and can be a square head, hexagonal head, etc. The second threaded section 213 is used for screwing to the second connector 22, and its dimensions match those of the second connector 22.

[0033] In some embodiments, the second connector 22 includes a third threaded section 221 with external threads, a third drive section 222 for tool connection, and a fourth threaded section 223 with external threads. The external thread of the third threaded section 221 matches the internal thread of the second threaded section 213. The fourth threaded section 223 is screwed to the lower connector 4, and the fourth threaded section 223 has an internal through hole with an inner diameter greater than or equal to the outer diameter of the third connector 23. The third drive section 222 is used for connecting tools such as wrenches and sockets, and can be a square head, hexagonal head, etc.

[0034] In some embodiments, the lower connector 4 includes a connector body 41, a plurality of connecting portions 42 for tool connection, and a blocking portion to prevent the resilient seal 3 from dislodging. The plurality of connecting portions 42 are symmetrically arranged on the outer wall of the connector body 41, and the blocking portion is located at the end of the connector body 41 away from the third connector 23. The connector body 41 is provided with an internal thread that matches the third connector 23. The blocking portion is obstructed and is not shown in the figure.

[0035] By implementing this utility model, the following beneficial effects can be achieved:

[0036] The connection device between the gland head and the braided sleeve of this utility model is connected to the gland head through the upper connector 1, and connected to the braided sleeve through the middle connecting component 2, the elastic sealing element 3 and the lower connector 4, so as to achieve effective fixation of the gland head and the braided sleeve.

[0037] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A connection device for a gland head and a snakeskin sleeve, characterized in that, It includes an upper connector (1) connected to the gland head, an intermediate connecting assembly (2) for the snakeskin sleeve to be fitted, an elastic seal (3) fitted outside the snakeskin sleeve, and a lower connector (4). The intermediate connecting assembly (2) is connected to the upper connector (1), the elastic seal (3) is placed between the intermediate connecting assembly and the lower connector (4), and the lower connector (4) is screwed to the intermediate connecting assembly (2). When the lower connector (4) is screwed into the intermediate connecting assembly (2), it squeezes the elastic seal (3) so that the elastic seal (3) is squeezed and fixed to the snakeskin sleeve. When the lower connector (4) is screwed out of the intermediate connecting assembly (2), it loosens the elastic seal (3) so that the elastic seal (3) reduces the pressure relative to the snakeskin sleeve.

2. The connection device between the gland head and the snakeskin sleeve according to claim 1, characterized in that, The intermediate connecting assembly (2) includes a first connector (21), a second connector (22) and a third connector (23). The first connector (21) is sleeved on the upper connector (1). The second connector (22) is connected to the first connector (21) and screwed to the lower connector (4). The third connector (23) is placed inside the second connector (22) and abuts against the second connector (22).

3. The connection device between the gland head and the snakeskin sleeve according to claim 2, characterized in that, The third connector (23) includes a positioning section (231), a transition section, and a snap-fit ​​section (232) for the snakeskin sleeve to be fitted. The transition section is connected to the positioning section (231) and the snap-fit ​​section (232) respectively. The positioning section (231) is inserted into the second connector (22), and the snap-fit ​​section (232) is inserted into the elastic seal (3).

4. The connection device between the gland head and the snakeskin sleeve according to claim 3, characterized in that, The end of the positioning section (231) near the second connector (22) is connected to the snap-fit ​​section (232) through the transition section, and a gap greater than the thickness of the side wall of the snakeskin sleeve is left between the positioning section (231) and the snap-fit ​​section (232).

5. The connection device between the gland head and the snakeskin sleeve according to claim 3, characterized in that, The snap-fit ​​section (232) is a cylindrical body with an outer diameter that is the same as the inner diameter of the snakeskin sleeve. The snap-fit ​​section (232) is provided with a clearance notch at one end away from the positioning section (231) for the snakeskin sleeve to be screwed in.

6. The connection device between the gland head and the snakeskin sleeve according to claim 2, characterized in that, The upper connector (1) sequentially includes a first connector section (11) that matches the inner diameter of the gland, a first drive section (12) for tool connection, a second connector section (13) that is screwed to the first connector (21), and an elastic structure (14) for clamping the cable that passes through the snakeskin sleeve. The first connector section (11) is provided with an external thread that matches the gland, and the second connector section (13) is provided with an external thread that matches the first connector (21).

7. The connection device between the gland head and the snakeskin sleeve according to claim 6, characterized in that, The elastic structure (14) is a toothed structure, including a plurality of toothed racks, which are integrally formed with the second joint section (13).

8. The connection device between the gland head and the snakeskin sleeve according to claim 6, characterized in that, The first connector (21) includes, in sequence, a first threaded section (211) with internal threads, a second drive section (212) for tool connection, and a second threaded section (213) with internal threads. The internal thread of the first threaded section (211) matches the external thread of the second connector section (13), and the first threaded section (211) is screwed to the second connector section (13); the second threaded section (213) is screwed to the second connector (22).

9. The connection device between the gland head and the snakeskin sleeve according to claim 8, characterized in that, The second connector (22) includes a third threaded section (221) with external threads, a third drive section (222) for tool connection, and a fourth threaded section (223) with external threads. The external threads of the third threaded section (221) match the internal threads of the second threaded section (213). The fourth threaded section (223) is screwed to the lower connector (4), and the fourth threaded section (223) has an internal through hole with an inner diameter greater than or equal to the outer diameter of the third connector (23).

10. The connection device between the gland head and the snakeskin sleeve according to any one of claims 2-8, characterized in that, The lower connector (4) includes a connector body (41), a plurality of connecting parts (42) for tool connection, and a blocking part to prevent the elastic seal (3) from falling out. The plurality of connecting parts (42) are symmetrically arranged on the outer wall of the connector body (41), and the blocking part is located at the end of the connector body (41) away from the third connector (23). The connector body (41) is provided with an internal thread that matches the third connector (23).

Images