Heat tracing cable connector for nuclear power station

Abstract

The heat tracing cable connector for the nuclear power station comprises a connecting cylinder and a connecting assembly, the connecting cylinder is provided with a first interface and a second interface, the first interface is used for accessing a heat tracing cable, and the second interface is used for accessing a power supply cable; the connecting assembly is arranged at the first interface and is used for fixing the heat tracing cable and the connecting cylinder; the connecting assembly comprises a fastener, the fastener is of a split type structure, and the fastener is arranged in the first interface and used for fixing the cold end cable connector of the heat tracing cable. Under the action of the connecting cylinder, the power supply cable and the heat tracing cable can be connected, the power supply cable can supply power to the heat tracing cable, the connecting procedure is simplified, the connecting position is located in the connecting cylinder and is not exposed outside, and the use safety is high; the fastener can fix the cold end cable joint of the heat tracing cable in the connecting cylinder, so that heat conduction of the heat tracing cable to the power supply cable is reduced; and the fastener is arranged to be of a split type structure, the size of the fastener can be adjusted, and installation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power equipment, in particular to a heat tracing cable connector for nuclear power plants. BACKGROUND

[0002] There are a large number of pipelines conveying liquid or gas (such as cooling water, chemical reagents, instrument air, etc.) in nuclear power plants, especially in cold environments or when the equipment is shut down, low temperature can cause the medium to freeze or flow to decrease, causing pipeline blockage, instrument failure or equipment damage, etc. In the prior art, a heat tracing cable is provided in the nuclear power plant to maintain the pipeline temperature by continuous heating to ensure that the medium is in a liquid or gaseous state, ensuring flowability and system function. The heat tracing cable is one of the key equipment to ensure the safe and stable operation of the system in the nuclear power plant.

[0003] However, in the prior art, when the heat tracing cable is powered, crimping or welding is often used to achieve the connection of the power supply cable of the heat tracing cable. However, this connection method makes the interface of the power supply cable and the heat tracing cable exposed, which can easily cause safety hazards and the connection stability of the power supply cable and the heat tracing cable is unreliable.

[0004] Therefore, the connection of the heat tracing cable and the power supply cable in the prior art has further improvement space. CONTENT OF THE INVENTION

[0005] Therefore, in view of the technical problem of low reliability and safety of the connection of the heat tracing cable and the power supply cable in the prior art, the present application provides a heat tracing cable connector for nuclear power plants, which is provided with a connecting barrel to accommodate the heat tracing cable and the power supply cable, and both ends are provided with ports for inserting the heat tracing cable and the power supply cable. The connection assembly is provided at the port for fastening the heat tracing cable, thereby realizing the reliability of the connection of the heat tracing cable and the power supply cable, and the connection of the power supply cable and the heat tracing cable is not exposed to the outside, greatly improving the safety.

[0006] The present application provides a heat tracing cable connector for nuclear power plants, comprising:

[0007] The connecting barrel is provided with a first interface and a second interface, the first interface is used to access the heat tracing cable, and the second interface is used to access the power supply cable;

[0008] The connection assembly is provided at the first interface and is used to fix the heat tracing cable and the connecting barrel;

[0009] The connection assembly includes a fastener, the fastener is a split structure, and the fastener is arranged in the first interface and is used to fix the cold end cable joint of the heat tracing cable.

[0010] Compared with the prior art, the application provides a heat tracing cable connector for a nuclear power plant, which is provided with a first interface and a second interface on a connecting barrel, a heat tracing cable can be connected into the connecting barrel through the first interface, and a power supply cable can be connected into the connecting barrel through the second interface, so that the power supply cable and the heat tracing cable can be connected under the action of the connecting barrel, the power supply cable can supply power to the heat tracing cable, the connection procedure of the power supply cable and the heat tracing cable is simplified, the connection position of the two is located in the connecting barrel and is not exposed outside, and the use safety is high; in addition, the connecting assembly can fasten the heat tracing cable on the connecting barrel, so as to ensure the connection reliability of the heat tracing cable and the power supply cable; the fastener is arranged, the cold end cable joint of the heat tracing cable can be fixed in the connecting barrel, and the heat conduction of the heat tracing cable to the power supply cable is reduced; and the fastener is arranged in a split structure, the size of the fastener can be adjusted, and the fastener is convenient to install.

[0011] Preferably, the connecting assembly further comprises a gland;

[0012] The gland is sleeved outside the first interface and is used for connecting the heat tracing cable with the connecting barrel and limiting the fastener in the connecting barrel.

[0013] In the embodiment, the gland can connect and fix the heat tracing cable with the connecting barrel and limit the fastener in the connecting barrel, so as to ensure the connection stability of the heat tracing cable and the connecting barrel.

[0014] Preferably, the fastener comprises at least two fastening blocks, the fastening blocks are distributed on the same circumference to form at least one locking port, and the locking port is used for allowing the cold end cable joint of the heat tracing cable to pass through.

[0015] In the embodiment, the locking port can allow the cold end cable joint to pass through, so as to send the cold end cable joint into the heat dissipation cavity of the connecting barrel to realize the connection with the power supply cable; the size of the locking port of the fastener can be adjusted to install heat tracing cables of different specifications, and the use flexibility of the connector is improved.

[0016] Preferably, the fastener comprises two locking ports, and the two locking ports are distributed on the same radial line.

[0017] The center point between the two locking ports is the center of the fastener.

[0018] In the embodiment, the two locking ports can be arranged to install the cold end cable joint of a heat tracing cable with a smaller specification.

[0019] Preferably, the first interface is provided with a mounting portion, and the mounting portion is used for mounting the fastener.

[0020] The outer side wall of the fastener and the inner side wall of the mounting portion are matched in inclination.

[0021] In the embodiment, the outer side wall of the fastener and the inner side wall of the mounting portion are matched in inclination, so that the fastener forms a tapered columnar structure. On the one hand, the fastener can be guided during installation, and the fastener can be quickly and smoothly inserted into the first interface. On the other hand, the fastener has a split structure, and the size of the locking port is proportional to the outer diameter of the fastener. When the outer diameter of the fastener is larger, the locking port is larger. By controlling the axial length of the fastener and the mounting portion, the size of the locking port can be adjusted.

[0022] Preferably, the mounting portion includes a first end portion and a second end portion, the first end portion is arranged away from the second interface, and the second end portion is arranged close to the second interface.

[0023] Preferably, the inner diameter of the first end portion is greater than the inner diameter of the second end portion.

[0024] In the embodiment, the first end portion is located outside the first interface, and the second end portion is located inside the first interface, so that the mounting portion is large outside and small inside, facilitating the installation of the fastener.

[0025] Preferably, along the axial direction, the length of the inner side wall of the mounting portion is greater than the length of the outer side wall of the fastener.

[0026] The connecting barrel is provided with a heat dissipation cavity, and the minimum inner diameter of the mounting portion is less than or equal to the inner diameter of the heat dissipation cavity.

[0027] In the embodiment, the length of the mounting portion is greater than the length of the fastener, so that the locking port of the fastener has an adjustment space, thereby improving the flexibility of use.

[0028] Preferably, the fastener and the connecting barrel are made of brass.

[0029] The connecting barrel is provided with a first ring groove and a second ring groove, the first ring groove is arranged close to the first interface, and the second ring groove is arranged close to the second interface.

[0030] In the embodiment, the first ring groove and the second ring groove are arranged, so that the external connecting piece can be limited at the first ring groove and the second ring groove, thereby facilitating the fixation of the connector. The fastener and the connecting barrel are made of brass, so that the fastener and the connecting barrel have conductivity, and the power cable can be electrically connected with the heat tracing cable through the connecting barrel.

[0031] Preferably, the gland includes a first mounting port and a second mounting port, and the first mounting port and the second mounting port are arranged along the axial direction.

[0032] The gland is mounted with the heat tracing cable through the first mounting port, and the gland is threadedly connected to the connecting cylinder through the second mounting port.

[0033] In the embodiment, the heat tracing cable and the connecting cylinder can be mounted respectively through the two mounting ports, so that the heat tracing cable can be mounted on the connecting cylinder.

[0034] Preferably, the first mounting port and the second mounting port are coaxially arranged, and the inner diameter of the first mounting port is smaller than that of the second mounting port.

[0035] The gland is provided with a grounding bolt.

[0036] In the embodiment, the inner diameter of the first mounting port is reduced to adapt to the caliber of the heat tracing cable, and the difference between the inner diameters of the first mounting port and the second mounting port forms a limiting step to limit the outer side of the fastener, so that the fastener can be limited in the first interface; and the grounding bolt can reliably connect the connector with the grounding system to ensure electrical safety and normal operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a cross-sectional structure schematic view of a heat tracing cable connector for nuclear power plants provided by an embodiment of the present application;

[0038] Figure 2 is a cross-sectional structure schematic view of a gland provided by an embodiment of the present application;

[0039] Figure 3 is a structure schematic view of a fastener provided by an embodiment of the present application Figure 1 ;

[0040] Figure 4 is a structure schematic view of a fastener provided by an embodiment of the present application Figure 2 ;

[0041] Figure 5 is Figure 1 a local A enlarged schematic view.

[0042] Reference signs: 1, heat tracing cable connector for nuclear power plants;

[0043] 11, connecting cylinder; 12, connecting assembly;

[0044] 111, first interface; 112, second interface; 113, heat dissipation cavity; 114, first ring groove; 115, second ring groove; 1111, mounting portion;

[0045] 121, fastener; 122, gland; 123, grounding bolt;

[0046] 1211, fastening block; 1212, locking port; 1221, first mounting port; 1222, second mounting port. DETAILED DESCRIPTION

[0047] In order for those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present disclosure and do not limit the present disclosure.

[0048] In the description of the present application, if the first, second, etc. are described for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implying the number of technical features indicated or the order of the technical features indicated.

[0049] Those skilled in the art should understand that in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as limiting the present application.

[0050] The present application will be further described in detail below in conjunction with the drawings, see Figures 1 to 5 Description.

[0051] The present application provides a heat tracing cable connector 1 (hereinafter referred to as connector 1) for nuclear power plants, which is applied in a nuclear power environment, used for heating equipment that needs to maintain the temperature of the pipeline in the nuclear power environment, to ensure that the medium is in a liquid or gaseous state, and to ensure fluidity and system function.

[0052] Specifically, as Figure 1 shown, the connector 1 includes a connecting barrel 11 and a connecting assembly 12, the connecting barrel 11 is a straight barrel structure, and a cavity is arranged in the connecting barrel 11; the connector 1 includes two interfaces, which are a first interface 111 and a second interface 112, the first interface 111 is used for connecting the heat tracing cable, and the second interface 112 is used for connecting the power cable, that is, the heat tracing cable and the power cable are connected to the connecting barrel 11 through the first interface 111 and the second interface 112 respectively, and the connecting barrel 11 is used for conducting electricity, and then the power cable is used for supplying power to the heat tracing cable, so as to ensure the function of the heat tracing cable.

[0053] Among them, as Figure 1 , Figure 5As shown, the connecting assembly 12 is arranged at the first interface 111 for connecting and fixing the heat tracing cable with the connecting barrel 11, so that the heat tracing cable will not be randomly detached; and, in view of the characteristics of the heat tracing cable, in order to avoid the heat tracing cable heating part affecting the power supply cable in terms of heat conduction, therefore, the connecting assembly 12 comprises a fastener 121 arranged in the first interface 111 for fixing the cold cable joint of the heat tracing cable, that is, the cold cable of the heat tracing cable passes through the fastener 121 fixed in the first interface 111, and then the cold cable is connected with the power supply cable through the connecting barrel 11, as a bridge between the heating part of the heat tracing cable system and the power supply, responsible for transmitting electric energy from the power supply to the heating part of the heat tracing cable, ensuring that the heat tracing cable can work normally.

[0054] Therefore, in the present application, the fastener 121 plays a role in fixing the cold cable of the heat tracing cable on one hand, and plays a role in heat insulation on the other hand; and the cavity of the connecting barrel 11 is also a heat dissipation cavity 113, the hollow space in the heat dissipation cavity 113 plays a certain role in heat insulation and heat dissipation, which can effectively dissipate the heat of the connecting barrel 11, and at the same time, can effectively prevent the heat outside the connector 1 from entering the connector 1, avoiding affecting the power supply cable.

[0055] It should be noted that in the present application, the connecting barrel 11 and the fastener 121 are made of No. 62 brass, so that the fastener 121 and the connecting barrel 11 have electrical conductivity, so that the power supply cable can be electrically connected with the heat tracing cable through the connecting barrel 11. And the wall thickness of the connecting barrel 11 is 3mm.

[0056] In the present application, the power supply cable is connected at the second interface 112 through a cable joint of M24X1.5.

[0057] Further, the connecting assembly 12 is further described; as Figures 1 to 5 As shown, the connecting assembly 12 further comprises a gland 122, the gland 122 is sleeved outside the first interface 111, the gland 122 is used for connecting the heat tracing cable with the connecting barrel 11, and the gland 122 can limit the fastener 121 in the connecting barrel 11, avoiding the fastener 121 from being detached from the first interface 111, ensuring the connection stability of the heat tracing cable and the connecting barrel 11.

[0058] Specifically, as Figure 2As shown, the gland 122 comprises a first mounting port 1221 and a second mounting port 1222, the first mounting port 1221 and the second mounting port 1222 are arranged in an axial direction, the first mounting port 1221 is located outside the second mounting port 1222, the first mounting port 1221 and the second mounting port 1222 are coaxially arranged, and the first mounting port 1221 and the second mounting port 1222 are both cylindrical structures; wherein, an inner thread is arranged on the inner side wall of the second mounting port 1222, an outer thread is arranged on the outer circumferential side wall of the connecting barrel 11 corresponding to the first interface 111, and the gland 122 is threadedly connected to the connecting barrel 11 through the second mounting port 1222; the gland 122 is used to install the heating cable through the first mounting port 1221, and the cold end cable of the heating cable enters the fastener 121 through the first mounting port 1221 to realize the connection between the heating cable and the connecting barrel 11.

[0059] As shown in the drawings, Figure 2 the inner diameter of the first mounting port 1221 is smaller than the inner diameter of the second mounting port 1222, a limiting step is formed between the first mounting port 1221 and the second mounting port 1222 due to the difference in inner diameter, the limiting step at least partially coincides with the first interface 111, when the fastener 121 is installed in the first interface 111, the limiting step can be attached to the outer side wall of the fastener 121 to limit the fastener 121, prevent the fastener 121 from being pulled out, and ensure the fastening of the cold end cable.

[0060] As shown in the drawings, Figure 2 the caliber of the first mounting port 1221 is set to 14.5mm, the caliber of the second mounting port 1222 is set to 28mm, and the outer diameter of the gland 122 is set to 32mm; along the axial direction of the first mounting port 1221, the depth of the first mounting port 1221 is 8mm, and the depth of the second mounting port 1222 is 15mm.

[0061] Further, as shown in the drawings, Figure 1 , Figure 2 , Figure 5 the gland 122 is provided with a grounding bolt 123, the grounding bolt 123 is arranged on the outer side of the gland 122 corresponding to the first mounting port 1221, the grounding bolt 123 is arranged away from the second mounting port 1222, and the insertion direction of the grounding bolt 123 is perpendicular to the axis of the first mounting port 1221; in this embodiment, the grounding bolt 123 can reliably connect the connector 1 with the grounding system to ensure electrical safety and normal operation of the equipment.

[0062] On the basis of any of the above embodiments, the connecting barrel 11 is further described; as shown in the drawings, Figure 1 , Figure 5As shown, the connecting cylinder 11 is provided with a first annular groove 114 and a second annular groove 115. The first annular groove 114 is located near the first interface 111, and the second annular groove 115 is located near the second interface 112. Both the first annular groove 114 and the second annular groove 115 are annular structures and are recessed towards the center of the connecting cylinder 11.

[0063] The first annular groove 114 has a gap of 30 mm between it and the outer wall of the first interface 111. The depth of the first annular groove 114 is 0.5 mm, and the diameter of the arc of the annular groove is 0.5 mm. The length of the first annular groove 114 is 11 mm along the axial direction.

[0064] Similarly, there is a gap of 30mm between the second annular groove 115 and the outer wall of the second interface 112, and the depth of the second annular groove 115 is 0.5mm, and the diameter of the arc of its annular groove is 0.5mm; along the axial direction, the length of the first annular groove 114 is 11mm.

[0065] Based on any of the above embodiments, the fastener 121 will be further described; such as Figure 1 , Figures 3 to 5 As shown, the fastener 121 has a segmented structure, comprising at least two fastening blocks 1211, each with the same structure. Multiple fastening blocks 1211 are spaced apart on the same circumference to form at least one locking opening 1212. The locking opening 1212 is used for the cold end cable connector of the heat tracing cable to pass through, thereby securing the cold end cable. In this embodiment, by setting the fastener 121 to a segmented structure, the size of the fastener 121 can be adjusted, and it is convenient to install the fastener 121 into the first interface 111.

[0066] Furthermore, such as Figure 5 As shown, the overall external structure of the fastener 121 is roughly a frustum-shaped structure. Correspondingly, the first interface 111 has a mounting portion 1111 for mounting the fastener 121. The fastener 121 is disposed within the mounting portion 1111, and the outer sidewall of the fastener 121 fits against the inner sidewall of the mounting portion 1111, so that the mounting portion 1111 has a conical structure. Specifically, as shown... Figure 5 As shown, along the axial direction, the outer wall of the fastener 121 is an inclined surface, and the inner wall of the mounting part 1111 is an inclined surface. That is, the inner wall of the mounting part 1111 and the inner wall of the fastener 121 both have an angle with the axis, which is approximately 2-3°.

[0067] In the embodiment, the outer side wall of the fastener 121 and the inner side wall of the mounting portion 1111 are provided with inclined surfaces with matching inclination, so that the fastener 121 forms a tapered columnar structure, which can guide the fastener 121 to be quickly and smoothly inserted into the first interface 111 when the fastener 121 is installed, and can control the size of the locking opening 1212 by controlling the axial length of the fastener 121 and the mounting portion 1111.

[0068] As shown in FIG. 1, the mounting portion 1111 includes a first end portion and a second end portion, the first end portion is arranged away from the second interface 112, and the second end portion is arranged close to the second interface 112, that is, the first end portion is located on the outer side, and the second end portion is located on the inner side, and the inner diameter of the first end portion is greater than that of the second end portion, so that the mounting portion 1111 forms an outer large and inner small structure, and the fastener 121 can be installed by first putting the thinner end into the mounting portion 1111 and then pushing it inward. Figure 5 Further, as shown in FIG. 1, in the axial direction, the length of the inner side wall of the mounting portion 1111 is greater than the length of the outer side wall of the fastener 121, so that the locking opening 1212 of the fastener 121 has a control space, and as the fitting length of the fastener 121 and the mounting portion 1111 in the axial direction increases, the caliber of the locking opening 1212 becomes smaller, and vice versa. Such arrangement can improve the applicability of the heat tracing cable with different caliber and improve the use flexibility of the connector 1.

[0069] Figure 5 In addition, the minimum inner diameter of the mounting portion 1111 is less than or equal to the inner diameter of the heat dissipation cavity 113, so as to avoid the inner end of the fastener 121 from sliding into the heat dissipation cavity 113.

[0070] On the basis of any of the above embodiments, the fastener 121 is further expanded; as shown in FIG. 1, the fastener 121 includes a fastening block 1211 and a locking opening 1212, the fastening block 1211 is arranged on the outer side of the fastener 121, and the locking opening 1212 is arranged on the inner side of the fastener 121.

[0071] In addition, the minimum inner diameter of the mounting portion 1111 is less than or equal to the inner diameter of the heat dissipation cavity 113, so as to avoid the inner end of the fastener 121 from sliding into the heat dissipation cavity 113. Figure 3 ​As shown in the figure, the fastener 121 can be provided with only one locking port 1212, the center of which is on the same straight line with the center of the fastener 121, and the two fastening blocks 1211 are in a sheet-shaped annular structure; the diameter of the locking port 1212 is 5.72-5.82mm; the locking port 1212 is used to install a cold end cable joint with a diameter of 12mm.

[0072] As shown in the figure, Figure 4 As shown in the figure, the fastener 121 includes two locking ports 1212, which are composed of two fastening blocks 1211, and the inner side of the two fastening blocks 1211 has two C-shaped grooves; the two locking ports 1212 are distributed along the same radial line, and the center point between the two locking ports 1212 is the center of the fastener 121; the diameter of the two locking ports 1212 is 2.83-2.93mm; the locking port 1212 is used to install a cold end cable joint with a diameter of 6mm.

[0073] It should be noted that in the present application, the maximum outer diameter of the fastener 121 is 11.34mm, the minimum outer diameter is 10.4mm, and the axial length of the fastener 121 is 12.29mm; and all tolerances are ±0.05mm.

[0074] In the present application, the fastener 121 with different diameters and different numbers of locking ports 1212 can be replaced to install different specifications of heat tracing cables, improving the flexibility of use.

[0075] It should be noted that the embodiments of the present application can be arbitrarily combined into new embodiments when the schemes do not conflict and the technical schemes can coexist.

[0076] The above has introduced the present application in detail, and the principles and implementation modes of the present application have been described by applying specific examples. The above description of the embodiments is only used to help understand the present application and the core idea. It should be noted that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A heat tracing cable connector for nuclear power plants, characterized in that, The application relates to a nuclear power plant heat tracing cable connector, comprising: a connecting cylinder (11) provided with a first interface (111) for connecting a heat tracing cable and a second interface (112) for connecting a power cable; a connecting assembly (12) arranged in the first interface (111) and used for fixing the heat tracing cable to the connecting cylinder (11); wherein the connecting assembly (12) comprises a fastener (121) in a split structure, the fastener (121) is arranged in the first interface (111) and used for fixing a cold end cable joint of the heat tracing cable.

2. The nuclear power plant heat tracing cable connector according to claim 1, wherein: the connecting assembly (12) further comprises a gland (122); the gland (122) is arranged outside the first interface (111) and used for connecting the heat tracing cable to the connecting cylinder (11) and limiting the fastener (121) in the connecting cylinder (11).

3. The nuclear power plant heat tracing cable connector according to claim 1, wherein: the fastener (121) comprises at least two fastening blocks (1211) which are arranged on the same circumference and are spaced apart to form at least one locking opening (1212) for the cold end cable joint of the heat tracing cable.

4. The nuclear power plant heat tracing cable connector according to claim 3, wherein: the fastener (121) comprises two locking openings (1212) which are arranged on the same radial line and are spaced apart; wherein the center point between the two locking openings (1212) is the center of the fastener (121).

5. The nuclear power plant heat tracing cable connector according to claim 1, wherein: the first interface (111) is provided with a mounting portion (1111) for mounting the fastener (121); wherein the outer side wall of the fastener (121) is an inclined surface in the axial direction, the inner side wall of the mounting portion (1111) is an inclined surface, and the outer side wall of the fastener (121) is attached to the inner side wall of the mounting portion (1111).

6. The nuclear power plant heat tracing cable connector according to claim 5, wherein: the mounting portion (1111) comprises a first end portion and a second end portion, the first end portion is arranged away from the second interface (112), and the second end portion is arranged close to the second interface (112); wherein the inner diameter of the first end portion is greater than that of the second end portion.

7. The nuclear power plant heat tracing cable connector according to claim 5, wherein: in the axial direction, the length of the inner side wall of the mounting portion (1111) is greater than that of the outer side wall of the fastener (121); the connecting cylinder (11) is provided with a heat dissipation cavity (113), and the minimum inner diameter of the mounting portion (1111) is less than or equal to the inner diameter of the heat dissipation cavity (113).

8. The nuclear power plant heat tracing cable connector according to claim 1, wherein: The fastener (121) and the connecting barrel (11) are made of brass; The connecting barrel (11) is provided with a first ring groove (114) and a second ring groove (115), the first ring groove (114) is arranged close to the first interface (111), and the second ring groove (115) is arranged close to the second interface (112).

9. The heat tracing cable connector for nuclear power plants according to claim 2, characterized in that, The gland (122) comprises a first mounting port (1221) and a second mounting port (1222), and the first mounting port (1221) and the second mounting port (1222) are arranged in an axial distribution; The gland (122) is mounted on the connecting barrel (11) through the second mounting port (1222) in a threaded connection.

10. The heat tracing cable connector for nuclear power plants according to claim 9, characterized in that, The first mounting port (1221) and the second mounting port (1222) are coaxially arranged, the inner diameter of the first mounting port (1221) is smaller than that of the second mounting port (1222); and The gland (122) is provided with a grounding bolt (123).

Images