Pressure equalizing sleeve and intermediate joint for cable

Abstract

The utility model discloses a voltage-sharing sleeve and an intermediate joint for a cable, the voltage-sharing sleeve comprises a body part and an annular part, the body part comprises a side wall and a transition part, and the transition part is connected with the side wall and extends along the radial direction; one end of the annular part is connected with the transition part, the other end of the annular part extends in the radial direction, the annular part can allow signals to penetrate through, a first wire passing hole is formed in the middle of the annular part, and a cable can penetrate through the first wire passing hole. According to the technical scheme of the utility model, the normal realization of the function of the voltage-sharing sleeve is ensured, the external temperature of the connecting pipe can be directly detected, and the safety of the intermediate joint for the cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to an intermediate joint for a voltage equalizing sleeve and a cable. Background Art

[0002] With the rapid development of power systems, people have an increasing demand for temperature monitoring of 110-220kV cable intermediate joints. How to quickly and accurately detect the temperature near the connecting pipe has become a problem that people need to solve. Due to the shielding effect of the equalizing sleeve, the existing cable intermediate joints cannot accurately detect and transmit the temperature signal between the equalizing sleeve and the connecting pipe, which brings inconvenience to people's lives. Utility Model Content

[0003] The main purpose of the utility model is to provide a pressure equalizing sleeve, which is intended to facilitate signal transmission of a temperature detection device.

[0004] In order to achieve the above object, the utility model provides a pressure equalizing sleeve, comprising:

[0005] A main body portion, the main body portion comprising a side wall and a transition portion, the transition portion and the side wall are connected and extend in a radial direction;

[0006] An annular portion, one end of which is connected to the transition portion, and the other end of which extends radially, the annular portion can allow signals to pass through, and a first wire hole is provided in the middle of the annular portion, and the first wire hole allows cables to pass through.

[0007] Optionally, the annular portion includes a hole wall, which encloses the first wire passing hole, and a first connecting hole extending radially is opened on the hole wall. A second connecting hole is arranged on the transition portion corresponding to the first connecting hole, and the connecting piece passes through the first connecting hole and is connected to the second connecting hole.

[0008] Optionally, a connecting groove is provided on the hole wall, and the first connecting hole is provided on the bottom wall of the connecting groove.

[0009] Optionally, the annular portion is a non-metallic material annular portion.

[0010] Optionally, the connecting piece is a connecting piece made of a conductive material, the cable comprises a plurality of conductive wires twisted together, and some of the conductive wires are electrically connected to the main body through the connecting piece.

[0011] Optionally, the pressure equalizing sleeve is arranged on the outside of the connecting pipe, and the diameter of the wall of the first wire hole is equal to the inner diameter of the connecting pipe.

[0012] Optionally, the outer wall diameter of the annular portion is greater than the distance from the temperature detection device to the axis.

[0013] Optionally, the end of the main body away from the annular portion further includes a bottom, and a second wire passing hole is provided on the bottom, and the diameter of the second wire passing hole is equal to the inner diameter of the connecting pipe.

[0014] Optionally, the annular portion is a Teflon material annular portion.

[0015] The utility model also provides an intermediate joint for a cable, which comprises a connecting pipe, a temperature detection device and the pressure equalizing sleeve; the pressure equalizing sleeve is arranged on the outside of the connecting pipe, and a temperature detection device is arranged between the pressure equalizing sleeve and the connecting pipe.

[0016] A technical solution of the utility model is to arrange an annular portion connected to the transition portion on the main body of the pressure equalizing sleeve, and the annular portion can allow signals to pass through. Such arrangement enables wireless signals received and sent by a temperature detection device arranged between the connecting pipe and the pressure equalizing sleeve to pass through the pressure equalizing sleeve smoothly, thereby communicating with external equipment. While ensuring the normal function of the pressure equalizing sleeve, it is also possible to directly detect the temperature outside the connecting pipe, thereby improving the safety of the intermediate joint for the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a partial three-dimensional structural schematic diagram of an embodiment of an intermediate joint for a cable of the utility model.

[0019] Figure 2 for Figure 1 Right view of .

[0020] Figure 3 for Figure 1 main view.

[0021] Description of Figure Numbers:

[0022] 1. Pressure equalizing sleeve; 10. Main body; 101. Side wall; 102. Transition part; 103. Bottom; 1031. Second wire hole; 20. Annular part; 201. First wire hole; 202. First connecting hole; 203. Hole wall; 204. Connecting groove; 30. Connecting pipe; 40. Temperature detection device.

[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] With the rapid development of power systems, people have an increasing demand for temperature monitoring of 110-220kV cable intermediate joints. However, when using a temperature monitoring module to monitor the temperature and transmit signals to the intermediate joints, since the intermediate joints require high sealing performance, a wireless and passive temperature monitoring and signal transmission solution is required. The wireless temperature measurement module (such as a temperature sensor and an RFID chip) is placed inside the intermediate joint, that is, the wireless temperature measurement module is close to the surface of the connecting pipe after crimping. However, since the connecting pipe and the equalizing sleeve are both made of metal, the equalizing sleeve outside the connecting pipe can shield the signal of the wireless temperature measurement module. This makes it difficult to achieve signal transmission between external equipment and the temperature measurement module.

[0028] In view of this, the utility model proposes a pressure equalizing sleeve 1.

[0029] Please refer to Figure 1-Figure 3 , Figure 1This is a partial three-dimensional structural diagram of an embodiment of an intermediate joint for cables of the utility model. It can be understood that the figure removes half of the complete pressure equalizing sleeve to facilitate the display of the positional relationship between the various parts of the pressure equalizing sleeve 1, the connecting pipe 30 and the temperature detection device 40. In actual use, the pressure equalizing sleeve 1 is a cylindrical structure surrounding the connecting pipe 30.

[0030] In an embodiment of the utility model, the voltage equalizing sleeve 1 includes a main body 10 and an annular portion 20, the main body 10 includes a side wall 101 and a transition portion 102, the transition portion 102 is connected to the side wall 101 and extends radially; one end of the annular portion 20 is connected to the transition portion 102, and the other end extends radially, the annular portion 20 can allow signals to pass through, and a first wire hole 201 is provided in the middle of the annular portion 20, and the first wire hole 201 allows cables to pass through.

[0031] According to the present embodiment, the pressure equalizing sleeve 1 includes a main body 10 and an annular portion 20, the main body 10 surrounds the outside of the connecting tube 30, the main body 10 includes a cylindrical side wall 101 and a transition portion 102 connected to the side wall 101, and the transition portion 102 extends radially; the transition portion 102 can be a ring, such as a circular ring. One end of the annular portion 20 is connected to the transition portion 102, and the other end extends radially, so that the transition portion 102 and the annular portion 20 together form a bottom surface of the pressure equalizing sleeve 1, and the bottom surface can be perpendicular to the side wall 101, the transition portion 102 forms an outer ring of the bottom surface, and the annular portion 20 forms an inner ring of the bottom surface. A first wire hole 201 is provided in the middle of the annular portion 20, and the first wire hole 201 allows the cable to pass through. Since the annular portion 20 can allow the signal to pass through, the signal sent by the temperature detection device 40 arranged on the outside of the connecting tube 30 can pass through the annular portion 20 to be sent to the external processing device, and the signal sent by the external processing device can also pass through the annular portion 20 and be received by the temperature detection device 40.

[0032] It is understandable that in the prior art, in order to stabilize the electrical performance of the cable connection, the connecting tube 30 is often crimped on the outer wall of the cable connection, and a pressure equalizing sleeve 1 is sleeved on the outside of the connecting tube 30. Since the connecting tube 30 and the pressure equalizing sleeve 1 are both made of metal, if a temperature detection device 40 is set on the outer wall of the connecting tube 30, the shielding effect of the pressure equalizing sleeve 1 will make it impossible for the temperature detection device 40 to send and receive wireless signals normally. Therefore, the utility model sets a transition portion 102 and an annular portion 20 on the bottom surface of the pressure equalizing sleeve 1 close to the temperature detection device 40. The annular portion 20 can allow the signal to pass through, thereby ensuring that the signal can be transmitted wirelessly between the temperature detection device 40 and the external device through the annular portion 20.

[0033] The utility model proposes an embodiment, the annular portion 20 includes a hole wall 203, the hole wall 203 surrounds the first wire hole 201, the hole wall 203 is provided with a first connecting hole 202 extending radially, and a second connecting hole is arranged on the transition portion 102 corresponding to the first connecting hole 202, and the connecting piece passes through the first connecting hole 202 and is connected to the second connecting hole.

[0034] According to the present embodiment, the annular portion 20 includes a hole wall 203, which is one end of the annular portion 20 away from the transition portion 102. The hole wall 203 encloses and forms a first wire hole 201, and the first wire hole 201 allows the cable to pass through. The hole wall 203 is provided with a first connecting hole 202 extending in the radial direction, and a second connecting hole is provided on the transition portion 102 corresponding to the first connecting hole 202. The connecting member passes through the first connecting hole 202 and is connected to the second connecting hole, thereby connecting the annular portion 20 and the transition portion 102. It can be understood that the connecting member can be a screw, a bolt, etc.

[0035] The present invention proposes an embodiment in which a connection groove 204 is provided on the hole wall 203 , and the first connection hole 202 is provided on the bottom wall of the connection groove 204 .

[0036] Through this embodiment, in order to prevent a connector from being directly arranged on the hole wall 203, where one end of the connector protrudes from the hole wall 203 and causes wear between the connector and the cable, a connecting groove 204 is provided on the hole wall 203. By arranging the first connecting hole 202 on the bottom wall of the connecting groove 204, one end of the connector will not protrude from the hole wall 203, thereby preventing wear on the cable.

[0037] The utility model proposes an embodiment, the annular portion 20 is a non-metallic material annular portion 20. It can be understood that in order to ensure that the wireless signal passes smoothly through the annular portion 20, the annular portion 20 can be made of non-metallic materials. Optionally, the non-metallic material can be glass, plastic or porcelain.

[0038] The utility model proposes an embodiment, in which the connecting piece is a connecting piece made of conductive material, the cable includes a plurality of conductive wires twisted together, and some of the conductive wires are electrically connected to the main body 10 through the connecting piece.

[0039] It can be understood that the cable includes a plurality of mutually twisted metal wires, and some of the metal wires are electrically connected to the main body 10 through a connector, thereby satisfying the requirement of electrical connection between the voltage equalizing sleeve 1 and the cable, while improving the voltage equalizing characteristics of the voltage equalizing sleeve 1.

[0040] An embodiment of the present utility model is proposed. The equalizing sleeve 1 is sleeved outside the connecting pipe 30, and the diameter of the hole wall 203 of the first wire passing hole 201 is equal to the inner diameter of the connecting pipe 30. Optionally, the outer diameter of the annular portion 20 is greater than the distance from the temperature detection device 40 to the axis. By making the diameter R1 of the hole wall 203 of the first wire passing hole 201 equal to the inner diameter of the connecting pipe 30, and the outer diameter R2 of the annular portion 20 greater than the distance r from the temperature detection device 40 to the axis, the distance r from the temperature detection device 40 to the axis satisfies R1 < r < R2, ensuring that the projection of the temperature detection device 40 on the bottom surface of the equalizing sleeve 1 is within the annular portion 20, so as to ensure that the wireless signal can smoothly pass through the annular portion 20 and be received and transmitted by the temperature detection device 40. Optionally, the outer diameter of the annular portion 20 is 90 mm.

[0041] An embodiment of the present utility model is proposed. One end of the body portion 10 away from the annular portion 20 further includes a bottom 103, and a second wire passing hole 1031 is provided on the bottom 103. The diameter of the second wire passing hole 1031 is equal to the inner diameter of the connecting pipe 30.

[0042] Through this embodiment, by providing the bottom 103 with the second wire passing hole 1031 at one end of the body portion 10 away from the annular portion 20, the sealing performance of the entire equalizing sleeve 1 can meet the requirements.

[0043] An embodiment of the present utility model is proposed. The material of the annular portion 20 is Teflon. It can be understood that by setting the material of the annular portion 20 as Teflon, the electrical and thermal properties of the entire equalizing sleeve 1 are maintained at a relatively excellent level. While meeting the electrical properties of the equalizing sleeve 1, it can also ensure that the wireless signal stably passes through the annular portion 20. Optionally, the material of the body portion 10 is metal. Preferably, the body portion 10 can be copper, especially brass.

[0044] The present utility model also proposes an intermediate joint for a cable. The intermediate joint for a cable includes a connecting pipe 30, a temperature detection device 40, and an equalizing sleeve 1. The specific structure of the equalizing sleeve 1 refers to the above embodiment; the equalizing sleeve 1 is sleeved outside the connecting pipe 30, and a temperature detection device 40 is provided between the equalizing sleeve 1 and the connecting pipe 30. Since the intermediate joint for a cable adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0045] The above are only optional embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A pressure equalizing sleeve (1), characterized in that: The pressure equalizing sleeve (1) comprises: A main body portion (10), the main body portion (10) comprising a side wall (101) and a transition portion (102), the transition portion (102) and the side wall (101) being connected and extending in a radial direction; An annular portion (20), one end of the annular portion (20) is connected to the transition portion (102), and the other end extends radially. The annular portion (20) can allow signals to pass through. A first wire hole (201) is provided in the middle of the annular portion (20), and the first wire hole (201) allows cables to pass through.

2. The pressure equalizing sleeve (1) according to claim 1, characterized in that: The annular portion (20) comprises a hole wall (203), the hole wall (203) encloses the first wire passing hole (201), a first connecting hole (202) extending radially is provided on the hole wall (203), a second connecting hole is provided on the transition portion (102) corresponding to the first connecting hole (202), and a connecting piece passes through the first connecting hole (202) and is connected to the second connecting hole.

3. The pressure equalizing sleeve (1) according to claim 2, characterized in that: A connecting groove (204) is provided on the hole wall (203), and the first connecting hole (202) is provided on the bottom wall of the connecting groove (204).

4. The pressure equalizing sleeve (1) according to claim 3, characterized in that: The annular portion (20) is an annular portion made of a non-metallic material.

5. The pressure equalizing sleeve (1) according to claim 4, characterized in that: The connecting piece is a connecting piece made of conductive material, the cable comprises a plurality of conductive threads twisted together, and some of the conductive threads are electrically connected to the main body (10) via the connecting piece.

6. The pressure equalizing sleeve (1) according to claim 5, characterized in that: The pressure equalizing sleeve (1) is sleeved on the outside of the connecting pipe (30), and the diameter of the hole wall (203) of the first wire passing hole (201) is equal to the inner diameter of the connecting pipe (30).

7. The pressure equalizing sleeve (1) according to claim 6, characterized in that: The outer wall diameter of the annular portion (20) is greater than the distance from the temperature detection device (40) to the axis.

8. The pressure equalizing sleeve (1) according to claim 7, characterized in that: The end of the main body (10) away from the annular portion (20) further comprises a bottom portion (103), and a second wire passing hole (1031) is provided on the bottom portion (103), and the diameter of the second wire passing hole (1031) is equal to the inner diameter of the connecting pipe (30).

9. The pressure equalizing sleeve (1) according to claim 8, characterized in that: The annular portion (20) is a Teflon material annular portion (20).

10. An intermediate joint for a cable, characterized in that: The intermediate joint for the cable comprises a connecting tube (30), a temperature detecting device (40) and a pressure equalizing sleeve (1) according to any one of claims 1 to 9; the pressure equalizing sleeve (1) is sleeved on the outside of the connecting tube (30), and a temperature detecting device (40) is provided between the pressure equalizing sleeve (1) and the connecting tube (30).

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