Test joint for sulfur hexafluoride gas insulation equipment

Abstract

The invention discloses a test connector for sulfur hexafluoride gas insulation equipment, and relates to the technical field of connectors, the test connector comprises a gas entraining assembly, the gas entraining assembly is provided with a gas passing channel, and a gas inlet and a gas outlet communicated with the gas passing channel; wherein one end, provided with a gas inlet, of the gas entraining assembly is communicated with a sulfur hexafluoride gas pipeline on sulfur hexafluoride gas insulation equipment, and one end, provided with a gas outlet, of the gas entraining assembly is communicated with test equipment. By simplifying the on-site testing or gas supplementing process of the SF6 gas insulation electrical equipment, the step of disassembling and assembling the SF6 gas valve cover for multiple times is reduced, so that the operation time is shortened, and the operation efficiency is improved; due to the sealing design, deformation of the sealing rubber mat possibly caused by repeated disassembly and assembly of the SF6 gas valve cover is avoided, and the risk of gas leakage during opening / closing of the SF6 valve is reduced; and the gas supplementing assembly arranged on the test connector can supplement SF6 gas into the transition gas chamber when necessary, so that the flexibility and the practicability of the equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, and in particular to a test connector for sulfur hexafluoride gas insulation equipment. Background Art

[0002] SF6 is an artificially synthesized inert gas. Because of its excellent arc extinguishing ability and physical and chemical properties, it is widely used in the power, semiconductor, metal smelting and other industries. At present, the on-site testing and gas replenishment process of SF6 gas-insulated electrical equipment is quite cumbersome. Specifically, the staff needs to first unscrew the two screws that fix the SF6 gas valve cover, remove the valve cover, and then connect the gas test connector to the SF6 gas test valve, and then tighten it with two screws, and then turn on the SF6 gas switch for testing. After the test, the staff needs to close the SF6 gas switch, remove the screws with a wrench, put the valve cover back on the SF6 gas valve port, and tighten the screws. Only then is the entire gas testing process completed. This traditional method has the following major 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 operating efficiency.

[0004] 2. Traditional detection joints usually use rubber gasket seals. Frequent disassembly and assembly operations can easily cause the sealing gasket to deform, increasing the risk of gas leakage when opening / closing the SF6 valve. Summary of the invention

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

[0006] In view of the above-mentioned problem that SF6 gas insulated electrical equipment has complicated on-site testing and gas replenishment procedures, the present invention is proposed.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a test joint for sulfur hexafluoride gas insulation equipment, comprising an air bleed assembly, wherein the air bleed assembly has an air passage, and an air inlet and an exhaust port connected to the air passage; wherein one end of the air bleed assembly having an air inlet is connected to a sulfur hexafluoride gas pipeline on the sulfur hexafluoride gas insulation equipment, and one end of the air bleed assembly having an exhaust port is connected to the test equipment.

[0008] As a preferred embodiment of the test connector for sulfur hexafluoride gas insulation equipment described in the present invention, the air bleed assembly includes an air bleed pipe and a transition air chamber; the air bleed pipe has a first end face, a second end face, and an air passage extending from the first end face to the second end face along the axial direction of the air bleed pipe; the transition air chamber has a transition air cavity, and an air outlet and an air inlet connected to the transition air cavity; the first end face of the air bleed pipe is provided with a first connecting portion, and the first connecting portion is used to be connected to the terminal flange of the sulfur hexafluoride gas pipeline on the sulfur hexafluoride gas insulation equipment; the second end face of the air bleed pipe is connected to the air inlet of the transition air chamber; the air outlet of the transition air chamber is provided with a second connecting portion, and the second connecting portion is used to be connected to the test equipment.

[0009] As a preferred solution of the test joint for sulfur hexafluoride gas insulated equipment of the present invention, the first connecting portion is a flange joint, and the first end surface of the air bleed pipe is fixedly connected to the first connecting portion.

[0010] As a preferred solution of the test joint for sulfur hexafluoride gas insulated equipment of the present invention, the second connection part is an external threaded joint, the second connection part is fixedly connected to the transition gas chamber, and communicates with the transition gas cavity through the gas outlet.

[0011] As a preferred solution of the test joint for sulfur hexafluoride gas insulated equipment of the present invention, a third connecting portion is provided at the gas outlet of the transition gas chamber, and the third connecting portion is used to be connected to the air duct.

[0012] As a preferred embodiment of the test joint for sulfur hexafluoride gas insulated equipment described in the present invention, the third connecting portion is an external threaded joint, the second end face of the air bleed pipe is provided with a sealing gasket, and the outer periphery of the end portion of the air bleed pipe corresponding to the second end face is movably sleeved with an internal threaded joint that is threadably matched with the third connecting portion.

[0013] As a preferred embodiment of the test joint for sulfur hexafluoride gas insulated equipment of the present invention, the gas duct, the first connecting portion, and the internal thread joint are all made of copper.

[0014] As a preferred solution of the test connector for sulfur hexafluoride gas insulated equipment of the present invention, the materials of the transition gas chamber, the second connecting part, and the third connecting part are all copper.

[0015] As a preferred embodiment of the test connector for sulfur hexafluoride gas insulated equipment described in the present invention, the test connector further comprises an air supply assembly, which comprises an air supply pipe, both ends of which are provided with external threads of the same structure; the transition air chamber is provided with an air supply port connected to the transition air cavity, and the air supply port is provided with an internal thread that can be adapted to the external thread at the end of the air supply pipe.

[0016] As a preferred embodiment of the test connector for sulfur hexafluoride gas insulated equipment described in the present invention, the test connector also includes a plugging assembly, which includes a first plugging head and a second plugging head; wherein the first plugging head is an internal threaded plug that is compatible with the external thread of the second connecting part; and the second plugging head is an internal threaded plug that is compatible with the external thread of the end of the gas supply pipe.

[0017] The beneficial effects of the present invention are as follows: by simplifying the on-site testing or gas replenishment process of SF6 gas-insulated electrical equipment, the steps of multiple disassembly and assembly of SF6 gas valve covers are reduced, thereby shortening the operation time and improving the operation efficiency; the sealing design avoids the deformation of the sealing gasket that may be caused by multiple disassembly and assembly of the SF6 gas valve cover, and reduces the risk of gas leakage when opening / closing the SF6 valve; the gas replenishment component equipped with the test joint can replenish SF6 gas into the transition gas chamber when necessary, thereby improving the flexibility and practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

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

[0020] Figure 2 It is a cross-sectional view of the present invention.

[0021] Figure 3 It is a schematic diagram of the connection structure of the air duct, the first connecting part, and the internal threaded joint in the present invention.

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

[0023] Figure 5 It is a structural schematic diagram of the gas replenishing component in the present invention.

[0024] Figure 6 for Figure 3 Enlarged view of point A in the middle.

[0025] Figure 7 for Figure 3 Enlarged view of point B in the middle.

[0026] In the figure: 100, air bleed assembly; 101, air passage; 102, air inlet; 103, exhaust port; 104, air bleed pipe; 104a, first end face; 104b, second end face; 104c, airway; 105, transition air chamber; 105a, transition air cavity; 105b, air outlet; 105c, air inlet; 105d, air supply 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 gasket; 110, internal threaded joint; 200, air supply assembly; 201, air supply pipe; 300, plugging assembly; 301, first plugging head; 302, second plugging head. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] Example 1

[0032] Reference Figure 1 to Figure 7 , which is the first embodiment of the present invention, provides a test connector for sulfur hexafluoride gas insulation equipment, which is used to connect the terminal flange of the sulfur hexafluoride gas pipeline on the sulfur hexafluoride gas insulation equipment and the test equipment

[0033] Specifically, the air bleed assembly 100 has an air passage 101, and an air inlet 102 and an air outlet 103 connected to the air passage 101; wherein, one end of the air bleed assembly 100 provided with the air inlet 102 is connected to the sulfur hexafluoride gas pipeline on the sulfur hexafluoride gas insulation device, and one end of the air bleed assembly 100 provided with the air outlet 103 is connected to the test equipment. After the sulfur hexafluoride gas flows out of the sulfur hexafluoride gas insulation device, 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 test joint outlet 103 for detection.

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

[0035] As a further improvement, the first end face 104a of the air bleed pipe 104 is provided with a first connecting portion 106, which is used to be connected to the terminal flange of the sulfur hexafluoride gas pipeline on the sulfur hexafluoride gas insulation equipment; that is, the test joint is connected to the terminal flange through the first connecting portion 106.

[0036] Specifically, the first connection part 106 is a flange joint. The first connection part 106 uses a diamond-shaped flange joint with the same structure as the terminal flange. The diamond-shaped flange joint is provided with a connection hole 106a corresponding to the round hole on the terminal flange. During installation, the locking bolt passes through the connection hole 106a on the diamond-shaped flange joint and the round hole on the terminal flange in sequence, and the nut is screwed on to complete the connection between the test joint and the terminal flange. Figure 6 As shown, a first annular groove 106b is provided on the side of the diamond-shaped flange joint facing the sulfur hexafluoride gas insulation equipment. The first annular groove 106b is coaxially arranged around the air inlet 102. An annular sealing ring is provided in the first annular groove 106b to ensure the sealing of the test joint after being connected to the terminal flange.

[0037] Specifically, the first end surface 104a of the air duct 104 is fixedly connected to the first connection portion 106, and the air duct 104 and the first connection portion 106 are connected by any connection method such as welding or integral molding to achieve seamless fixed connection.

[0038] As a further improvement, the second end face 104b of the air bleed pipe 104 is connected to the air inlet 105c of the transition air chamber 105; the air outlet 105b of the transition air chamber 105 is provided with a second connection part 107, and the second connection part 107 is used to connect with the test equipment. When in use, the test equipment is connected to the transition air chamber 105 by threading the input end interface of the test equipment with the second connection part 107, that is, the connection between the test equipment and the test joint is realized, that is, the connection between the test equipment and the sulfur hexafluoride gas pipeline on the sulfur hexafluoride gas insulation device is realized.

[0039] Specifically, the second connection portion 107 is an external threaded joint, the second connection portion 107 is fixedly connected to the transition air chamber 105, and communicates with the transition air cavity 105a through the air outlet 105b.

[0040] As a further improvement, a third connecting portion 108 is provided at the air outlet 105 b of the transition air chamber 105 , and the third connecting portion 108 is used to connect with the air duct 104 .

[0041] Specifically, the third connection part 108 is an external threaded joint, and the outer periphery of the end of the air duct 104 corresponding to the second end face 104b is movably sleeved with an internal threaded joint 110 threadably matched with the third connection part 108. When in use, the air duct 104 is connected to the transition air chamber 105 by screwing the internal threaded joint 110 on the air duct 104 with the third connection part 108.

[0042] As a further improvement, a sealing gasket 109 is provided on the second end face 104b of the air duct 104, and the sealing gasket 109 is installed on the second end face 104b of the air duct 104 by gluing to ensure the sealing of the air duct 104 and the transition air chamber 105 after connection.

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

[0044] As a further improvement, the materials of the transition air chamber 105 , the second connection portion 107 , and the third connection portion 108 are all copper.

[0045] Copper material has good plasticity and ductility, which makes the test joint easy to process. Copper material also has good thermal conductivity and corrosion resistance, which meets the requirements of sulfur hexafluoride gas flow transfer for testing.

[0046] The remaining structures are the same as those of Example 1.

[0047] Example 2

[0048] Reference Figure 1 , Figure 2 and Figure 5, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the test joint further includes a gas replenishing component 200 for replenishing sulfur hexafluoride gas into the transition gas cavity 105a of the transition gas chamber 105 when necessary.

[0049] Specifically, the gas supply assembly 200 includes a gas supply pipe 201, both ends of which are provided with external threads of the same structure; the transition gas chamber 105 is provided with a gas supply port 105d connected to the transition gas cavity 105a, and the gas supply port 105d is provided with an internal thread that can be adapted to the external thread at the end of the gas supply pipe 201. When in use, the connection between the gas supply pipe 201 and the test joint is completed by screwing the external thread part at either end of the gas supply pipe 201 into the gas supply port 105d provided with the internal thread, and the external thread part at the other end of the gas supply pipe 201 is connected to 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 air chamber 105, and the first annular groove 106b is coaxially arranged around the air supply port 105d. An annular sealing ring is provided in the second annular groove 105e to ensure the sealing after the air supply pipe 201 is connected to the test joint.

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

[0052] Example 3

[0053] Reference Figure 1 and Figure 2 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the test connector further includes a blocking component 300 for blocking the second connecting portion 107 and the air supply pipe 201.

[0054] Specifically, the plugging assembly 300 includes a first plugging head 301 and a second plugging head 302; wherein the first plugging head 301 is an internal thread plug adapted to the external thread of the second connection part 107; and the second plugging head 302 is an internal thread plug adapted to the external thread of the end of the air supply pipe 201. When in use, the first plugging head 301 is screwed into the external thread of the second connection part 107, and the second plugging head 302 is screwed into the external thread of the end of the air supply pipe 201, so as to achieve the plugging work of the second connection part 107 and the air supply pipe 201, that is, after the test, there is no need to disassemble the test joint, and only the opening needs to be plugged, which is convenient for subsequent test experiments.

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

[0056] The remaining structure is the same as that of Example 2.

[0057] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0058] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0059] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A test connector for sulfur hexafluoride gas insulated equipment, characterized in that: include, An air bleed assembly (100) is provided with an air passage (101), and an air inlet (102) and an air outlet (103) which are in communication with the air passage (101); wherein one end of the air bleed assembly (100) provided with the air inlet (102) is in communication with a sulfur hexafluoride gas pipeline on a sulfur hexafluoride gas insulation device, and one end of the air bleed assembly (100) provided with the air outlet (103) is in communication with a test device.

2. The test connector for sulfur hexafluoride gas insulated equipment according to claim 1, characterized in that: The air bleed assembly (100) comprises an air bleed pipe (104) and a transition air chamber (105); The air duct (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 duct (104); The transition air chamber (105) comprises a transition air cavity (105a), and an air outlet (105b) and an air inlet (105c) communicating with the transition air cavity (105a); The first end surface (104a) of the air duct (104) is provided with a first connection portion (106), and the first connection portion (106) is used to be connected to a terminal flange of a sulfur hexafluoride gas pipeline on a sulfur hexafluoride gas insulation device; The second end surface (104b) of the air duct (104) is connected to the air inlet (105c) of the transition air chamber (105); A second connection portion (107) is provided at the air outlet (105b) of the transition air chamber (105), and the second connection portion (107) is used to connect to a test device.

3. The test connector for sulfur hexafluoride gas insulated equipment according to claim 2, characterized in that: The first connection portion (106) is a flange joint, and the first end surface (104a) of the air duct (104) is fixedly connected to the first connection portion (106).

4. The test connector for sulfur hexafluoride gas insulated equipment according to claim 3, characterized in that: The second connection portion (107) is an external threaded joint, the second connection portion (107) is fixedly connected to the transition air chamber (105), and is communicated with the transition air cavity (105a) through the air outlet (105b).

5. The test connector for sulfur hexafluoride gas insulated equipment according to claim 4, characterized in that: A third connection portion (108) is provided at the air outlet (105b) of the transition air chamber (105), and the third connection portion (108) is used to be connected to the air duct (104).

6. The test connector for sulfur hexafluoride gas insulated equipment according to claim 5, characterized in that: The third connection part (108) is an external threaded joint, the second end face (104b) of the air duct (104) is provided with a sealing gasket (109), and the end of the air duct (104) corresponding to the second end face (104b) is movably sleeved with an internal threaded joint (110) threadably matched with the third connection part (108).

7. The test connector for sulfur hexafluoride gas insulated equipment according to claim 6, characterized in that: The air duct (104), the first connecting portion (106), and the internal thread joint (110) are all made of copper.

8. The test connector for sulfur hexafluoride gas insulated equipment according to claim 5 or 6, characterized in that: The transition air chamber (105), the second connection portion (107), and the third connection portion (108) are all made of copper.

9. The test connector for sulfur hexafluoride gas insulated equipment according to any one of claims 2 to 6, characterized in that: The test joint further comprises an air supply assembly (200), which comprises an air supply pipe (201), and both ends of the air supply pipe (201) are provided with external threads of the same structure; The transition air chamber (105) is provided with an air supply port (105d) communicating with the transition air cavity (105a), and the air supply port (105d) is provided with an internal thread that can be matched with the external thread at the end of the air supply pipe (201).

10. The test connector for sulfur hexafluoride gas insulated equipment according to claim 9, characterized in that: The test joint further comprises a plugging assembly (300), wherein the plugging assembly (300) comprises a first plugging head (301) and a second plugging head (302); Wherein, the first plugging head (301) is an internal thread plug adapted to the external thread of the second connecting portion (107); The second plugging head (302) is an internal thread plug adapted to fit the external thread of the end of the air supply pipe (201).

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