A test connector for a sulfur hexafluoride gas-insulated apparatus

Abstract

The application discloses a kind of test joints for sulfur hexafluoride gas insulated equipment, it is related to the technical field of connector, including, gas guide assembly, the gas guide assembly has gas channel, and the gas inlet and exhaust port communicated with the gas channel;Wherein, the gas guide assembly is equipped with the one end of gas inlet and sulfur hexafluoride gas pipeline on sulfur hexafluoride gas insulated equipment communication, the gas guide assembly is equipped with the one end of exhaust port and test equipment communication.Simplify the field test or gas supplement process of SF6 gas insulated electrical equipment, reduce the steps of disassembling SF6 gas valve cover multiple times, thereby shorten the operation time, improve the operation efficiency;Sealing design avoids the deformation of sealing rubber gasket that may be caused by disassembling SF6 gas valve cover multiple times, reduces the risk of gas leakage when SF6 valve is opened / closed;Gas supplement assembly equipped with test joint can supplement SF6 gas into transition gas chamber when necessary, improve the flexibility and practicability of equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of connectors, in particular to a test connector for SF6 gas insulated equipment. BACKGROUND

[0002] SF6 is an artificially synthesized inert gas, which is widely used in the power, semiconductor and metal smelting industries due to its excellent arc extinguishing ability and physical and chemical properties. Currently, the on-site testing and gas replenishment process of SF6 gas insulated electrical equipment is quite cumbersome. Specifically, the staff needs to unscrew two screws that fix the SF6 gas valve cover, remove the valve cover, connect the gas test connector to the SF6 gas test valve, tighten the two screws, then open the SF6 gas switch for testing and detection. After the test is completed, the staff needs to close the SF6 gas switch, use a wrench to remove the screws, cover the SF6 gas valve with the valve cover again, and tighten the screws, so that the entire gas testing process is completed. This traditional method has the following main problems:

[0003] 1. Since the SF6 gas valve cover needs to be disassembled and assembled multiple times, the entire testing process takes a long time, resulting in low work efficiency.

[0004] 2. The traditional detection connector usually uses a rubber pad seal, and frequent disassembly and assembly operations can easily cause the sealing rubber pad to deform, increasing the risk of gas leakage when the SF6 valve is opened / closed. SUMMARY

[0005] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] In view of the above-mentioned problem that the on-site testing and gas replenishment process of SF6 gas insulated electrical equipment is cumbersome, the present application is proposed.

[0007] To solve the above technical problems, the present application provides the following technical solution: a test connector for SF6 gas insulated equipment, comprising a gas introduction assembly, the gas introduction assembly has a gas passage, and an inlet and an outlet communicated with the gas passage; wherein one end of the gas introduction assembly provided with the inlet is communicated with the SF6 gas pipeline on the SF6 gas insulated equipment, and one end of the gas introduction assembly provided with the outlet is communicated with the test equipment.

[0008] As a preferred scheme of the test joint for the SF6 gas insulated equipment according to the application, wherein: the air induction assembly comprises an air induction pipe and a transition air chamber; the air induction pipe has a first end face, a second end face, and an air channel extending from the first end face to the second end face along the air induction pipe; the transition air chamber has a transition air cavity, and an air outlet and an air inlet communicating with the transition air cavity; the first end face of the air induction pipe is provided with a first connecting part for connecting with a terminal flange of an SF6 gas pipeline on the SF6 gas insulated equipment; the second end face of the air induction pipe is connected with the air inlet of the transition air chamber; and the air outlet of the transition air chamber is provided with a second connecting part for connecting with a test device.

[0009] As a preferred scheme of the test joint for the SF6 gas insulated equipment according to the application, wherein: the first connecting part is a flange joint, and the first end face of the air induction pipe is fixedly connected with the first connecting part.

[0010] As a preferred scheme of the test joint for the SF6 gas insulated equipment according to the application, wherein: the second connecting part is an external thread joint, the second connecting part is fixedly connected with the transition air chamber, and communicates with the transition air cavity through the air outlet.

[0011] As a preferred scheme of the test joint for the SF6 gas insulated equipment according to the application, wherein: the air outlet of the transition air chamber is provided with a third connecting part for connecting with the air induction pipe.

[0012] As a preferred scheme of the test joint for the SF6 gas insulated equipment according to the application, wherein: the third connecting part is an external thread joint, the second end face of the air induction pipe is provided with a sealing gasket, and an internal thread joint threadedly matched with the third connecting part is movably sleeved on the outer periphery of the end part corresponding to the second end face of the air induction pipe.

[0013] As a preferred scheme of the test joint for the SF6 gas insulated equipment according to the application, wherein: the air induction pipe, the first connecting part, and the internal thread joint are all made of copper.

[0014] As a preferred scheme of the test joint for the SF6 gas insulated equipment according to the application, wherein: the transition air chamber, the second connecting part, and the third connecting part are all made of copper.

[0015] As a preferred scheme of the test joint for the SF6 gas insulated equipment according to the application, wherein: the test joint further comprises a gas supplement assembly comprising a gas supplement pipe, the gas supplement pipe is provided with external threads of the same structure at both ends; the transition air chamber is provided with a gas supplement port communicating with the transition air cavity, and the gas supplement port is provided with an internal thread capable of threadedly matching with the external threads of the end part of the gas supplement pipe.

[0016] As a preferred scheme of the test joint for the SF6 gas insulated device, wherein: the test joint further comprises a plugging assembly, the plugging assembly comprises a first plugging head and a second plugging head; wherein the first plugging head is an internal thread plug that is matched with the external thread of the second connecting part; the second plugging head is an internal thread plug that is matched with the external thread of the end of the air supplement pipe.

[0017] The beneficial effects of the present application: by simplifying the on-site test or air supplement process of the SF6 gas insulated electrical device, the steps of disassembling and assembling the SF6 gas valve cover multiple times are reduced, thereby shortening the operation time and improving the operation efficiency; the sealing design avoids the deformation of the sealing rubber gasket caused by the multiple disassembly and assembly of the SF6 gas valve cover, and reduces the risk of gas leakage when the SF6 valve is opened / closed; the air supplement assembly equipped with the test joint can supplement SF6 gas into the transition gas chamber when necessary, thereby improving the flexibility and practicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0020] Figure 2 It is a sectional view of the present application.

[0021] Figure 3 It is a schematic diagram of the connection structure of the air inlet pipe, the first connecting part, and the internal thread joint in the present application.

[0022] Figure 4 It is a schematic diagram of the structure of the transition gas chamber in the present application.

[0023] Figure 5 It is a schematic diagram of the structure of the air supplement assembly in the present application.

[0024] Figure 6 It is Figure 3 It is an enlarged view of A in the figure.

[0025] Figure 7 It is Figure 3 It is an enlarged view of B in the figure.

[0026] In the figure: 100, air entraining assembly; 101, air passage; 102, air inlet; 103, air outlet; 104, air entraining pipe; 104a, first end surface; 104b, second end surface; 104c, air passage; 105, transition air chamber; 105a, transition air cavity; 105b, air outlet; 105c, air inlet; 105d, air supplementing port; 105e, second annular groove; 106, first connecting part; 106a, connecting hole; 106b, first annular groove; 107, second connecting part; 108, third connecting part; 109, sealing washer; 110, internally threaded joint; 200, air supplementing assembly; 201, air supplementing pipe; 300, plugging assembly; 301, first plugging head; 302, second plugging head. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0029] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or selected from other embodiments.

[0030] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual manufacture.

[0031] Embodiment 1

[0032] Reference Figures 1-7 For the first embodiment of the present application, a test joint for a sulfur hexafluoride gas insulated device is provided, which is used for connecting the terminal flange of the sulfur hexafluoride gas pipeline on the sulfur hexafluoride gas insulated device and the test equipment

[0033] Specifically, the air induction assembly 100 has an air passage 101, and an air inlet 102 and an air outlet 103 in communication with the air passage 101; wherein one end of the air induction assembly 100 provided with the air inlet 102 is in communication with the SF6 gas pipeline on the SF6 gas insulated equipment, and one end of the air induction assembly 100 provided with the air outlet 103 is in communication with the test equipment. After the SF6 gas flows out of the SF6 gas insulated equipment, it enters the test joint from the air inlet 102 of the test joint, flows along the air passage, and flows into the test equipment through the air outlet 103 of the test joint for detection.

[0034] As a further improvement, the air induction assembly 100 includes an air induction pipe 104 and a transition gas chamber 105; wherein the air induction pipe 104 has a first end surface 104a, a second end surface 104b, and an air passage 104c extending from the first end surface 104a to the second end surface 104b along the axial direction of the air induction pipe 104; the transition gas chamber 105 has a transition gas cavity 105a, and an air outlet 105b and an air inlet 105c in communication with the transition gas cavity 105a.

[0035] As a further improvement, the first end surface 104a of the air induction pipe 104 is provided with a first connecting part 106, and the first connecting part 106 is used to connect with the terminal flange of the SF6 gas pipeline on the SF6 gas insulated equipment; that is, by connecting the first connecting part 106 with the terminal flange, the test joint is connected with the terminal flange.

[0036] Specifically, the first connecting part 106 is a flange joint, and the first connecting part 106 selects a rhombic flange joint with the same structure as the terminal flange, and the rhombic flange joint is provided with a connecting hole 106a corresponding to the circular hole on the terminal flange, and when installed, the locking bolt passes through the connecting hole 106a on the rhombic flange joint and the circular hole on the terminal flange in sequence, and the nut is screwed, and the test joint is connected with the terminal flange. As shown in Figure 6 The rhombic flange joint is provided with a first annular groove 106b on the side facing the SF6 gas insulated equipment, the first annular groove 106b is coaxially arranged around the air inlet 102, and a ring-shaped sealing ring is arranged in the first annular groove 106b to ensure the sealing performance after the test joint is connected with the terminal flange.

[0037] Specifically, the first end surface 104a of the air induction pipe 104 is fixedly connected with the first connecting part 106, and the air induction pipe 104 and the first connecting part 106 are connected by any connecting mode such as welding or integral molding to realize seamless fixed connection.

[0038] As a further improvement, the second end surface 104b of the air inlet pipe 104 is connected with the air inlet 105c of the transition chamber 105; the air outlet 105b of the transition chamber 105 is provided with a second connecting part 107, which is used for connecting with the testing device. In use, the testing device is connected with the transition chamber 105 by screwing the input end interface of the testing device with the second connecting part 107, that is, the testing device is connected with the testing joint, and the testing device is communicated with the SF6 gas pipeline on the SF6 gas insulated device.

[0039] Specifically, the second connecting part 107 is an external thread joint, which is fixedly connected with the transition chamber 105 and communicated with the transition cavity 105a through the air outlet 105b.

[0040] As a further improvement, the air outlet 105b of the transition chamber 105 is provided with a third connecting part 108, which is used for connecting with the air inlet pipe 104.

[0041] Specifically, the third connecting part 108 is an external thread joint, and the end portion of the air inlet pipe 104 corresponding to the second end surface 104b is movably sleeved with an internal thread joint 110 which is screw-adapted with the third connecting part 108. In use, the internal thread joint 110 on the air inlet pipe 104 is screwed with the third connecting part 108 to realize the connection between the air inlet pipe 104 and the transition chamber 105.

[0042] As a further improvement, the second end surface 104b of the air inlet pipe 104 is provided with a sealing gasket 109, which is installed on the second end surface 104b of the air inlet pipe 104 by means of adhesive to ensure the sealing after the connection between the air inlet pipe 104 and the transition chamber 105.

[0043] As a further improvement, the air inlet pipe 104, the first connecting part 106, and the internal thread joint 110 are all made of copper.

[0044] As a further improvement, the transition chamber 105, the second connecting part 107, and the third connecting part 108 are all made of copper.

[0045] The copper material has good plasticity and ductility, so that the testing joint is easy to process, and the copper material has good heat conductivity and corrosion resistance, which meets the needs of the flow transfer of the SF6 gas for testing.

[0046] The rest of the structure is the same as that of Example 1.

[0047] Example 2

[0048] Reference Figure 1 , Figure 2 and Figure 5For the second embodiment of the present application, which is different from the first embodiment, the test connector further comprises a gas supplement assembly 200 for supplementing sulfur hexafluoride gas into the transition gas cavity 105a of the transition gas chamber 105 when necessary.

[0049] Specifically, the gas supplement assembly 200 comprises a gas supplement pipe 201, both ends of the gas supplement pipe 201 are provided with outer threads of the same structure; the transition gas chamber 105 is provided with a gas supplement port 105d in communication with the transition gas cavity 105a, and the gas supplement port 105d is provided with an inner thread capable of adapting to the outer thread of the end of the gas supplement pipe 201. In use, the connection of the gas supplement pipe 201 with the test connector is completed by screwing the outer thread part of either end of the gas supplement pipe 201 into the gas supplement port 105d provided with the inner thread, and the outer thread part of the other end of the gas supplement pipe 201 is connected with the end joint of the sulfur hexafluoride gas pipeline.

[0050] As a further improvement, a second annular groove 105e is provided on the outer wall of the transition gas chamber 105, and the first annular groove 106b is coaxially arranged around the gas supplement port 105d, and a ring-shaped sealing ring is arranged in the second annular groove 105e to ensure the sealing performance of the gas supplement pipe 201 after being connected with the test connector.

[0051] As a further improvement, the material of the gas supplement pipe 201 is copper.

[0052] Embodiment 3

[0053] Reference Figure 1 and Figure 2 For the third embodiment of the present application, which is different from the second embodiment, the test connector further comprises a plugging assembly 300 for plugging the second connecting part 107 and the gas supplement pipe 201.

[0054] Specifically, the plugging assembly 300 comprises a first plugging head 301 and a second plugging head 302; wherein the first plugging head 301 is an inner thread plug head adapted to the outer thread of the second connecting part 107; the second plugging head 302 is an inner thread plug head adapted to the outer thread of the end of the gas supplement pipe 201. In use, the first plugging head 301 is screwed with the outer thread of the second connecting part 107, and the second plugging head 302 is screwed with the outer thread of the end of the gas supplement pipe 201, so as to realize the plugging work of the second connecting part 107 and the gas supplement pipe 201, that is, after the test, the test connector does not need to be disassembled, but only needs to be plugged, which is convenient for subsequent test experiments.

[0055] As a further improvement, the materials of the first plugging head 301 and the second plugging head 302 are both copper.

[0056] The rest of the structure is the same as that of embodiment 2.

[0057] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Thus, the foregoing description is by way of example only, and is not intended to be limiting. The application is limited only as defined in the following claims and equivalents thereto. The sequence of any process or method steps, or the order in which they are carried out, can be altered or re-ordered without departing from the scope of the application. Any "articles of manufacture" or "manufacturing" as described herein are intended to encompass structures constructed of a multitude of different physical elements or components. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and also cover structures yet to be invented which perform the recited function but operate in a different manner. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims.

[0058] Also, to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (that is, not all implementations can include all of the features described or optional implementations can include only a subset of the features described).

[0059] It should be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0060] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and all should be included in the scope of the claims of the present application.

Claims

1. A test connector for a sulfur hexafluoride gas insulated apparatus, characterized by: The utility model relates to a test joint for SF6 gas insulated equipment, which comprises a gas leading component (100) having a gas channel (101), an inlet (102) and an outlet (103) in communication with the gas channel (101), wherein one end of the gas leading component (100) provided with the inlet (102) is in communication with a SF6 gas pipeline on the SF6 gas insulated equipment, and the other end of the gas leading component (100) provided with the outlet (103) is in communication with a test device. The gas leading component (100) comprises a gas leading pipe (104) and a transition gas chamber (105). The gas leading pipe (104) has a first end surface (104a), a second end surface (104b), and a gas channel (104c) extending from the first end surface (104a) to the second end surface (104b) along the axial direction of the gas leading pipe (104). The transition gas chamber (105) has a transition gas cavity (105a), an outlet (105b) and an inlet (105c) in communication with the transition gas cavity (105a). The first end surface (104a) of the gas leading pipe (104) is provided with a first connecting part (106) for connecting with a terminal flange of the SF6 gas pipeline on the SF6 gas insulated equipment. The second end surface (104b) of the gas leading pipe (104) is connected with the inlet (105c) of the transition gas chamber (105). The outlet (105b) of the transition gas chamber (105) is provided with a second connecting part (107) for connecting with the test device. The test joint further comprises a gas supplement component (200) comprising a gas supplement pipe (201), both ends of the gas supplement pipe (201) are provided with external threads of the same structure. The transition gas chamber (105) is provided with a gas supplement port (105d) in communication with the transition gas cavity (105a), and the gas supplement port (105d) is provided with internal threads capable of adapting to the external threads of the end of the gas supplement pipe (201). The test joint further comprises a plugging component (300) comprising a first plugging head (301) and a second plugging head (302). The first plugging head (301) is an internal thread plug head capable of adapting to the external threads of the second connecting part (107). The second plugging head (302) is an internal thread plug head capable of adapting to the external threads of the end of the gas supplement pipe (201). The first connecting part (106) is a flange joint, and the first end surface (104a) of the gas leading pipe (104) is fixedly connected with the first connecting part (106).

2. The test tap for a sulfur hexafluoride gas insulated device according to claim 1, characterized by: The second connecting part (107) is an external thread joint, and the second connecting part (107) is fixedly connected with the transition gas chamber (105) and in communication with the transition gas cavity (105a) through the outlet (105b).

3. The test tap for a sulfur hexafluoride gas insulated device according to claim 2, characterized by: The outlet (105b) of the transition gas chamber (105) is provided with a third connecting part (108) for connecting with the gas leading pipe (104).

4. The test tap for a sulfur hexafluoride gas insulated device according to claim 3, characterized by: ​ 5. The test tap for a sulfur hexafluoride gas insulated device according to claim 4, characterized by: The third connecting part (108) is an external thread joint, a second end surface (104b) of the air pipe (104) is provided with a sealing washer (109), and an end portion of the air pipe (104) corresponding to the second end surface (104b) is movably sleeved with an internal thread joint (110) which is threadedly matched with the third connecting part (108).

6. The test tap for a sulfur hexafluoride gas- insulated device according to claim 5, characterized in that: The air pipe (104), the first connecting part (106), and the internal thread joint (110) are all made of copper.

7. The test tap for a sulphur hexafluoride gas- insulated apparatus according to claim 4 or 5, characterized in that: The transition gas chamber (105), the second connecting part (107), and the third connecting part (108) are all made of copper.

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