A dual-purpose joint suitable for mixed gas charging and detection

Abstract

The application discloses a dual-purpose joint suitable for mixed gas inflation and detection, which comprises a joint main body, a first nut, a first check valve, a second nut, a second check valve, a detection interface nut and a detection interface check valve; further comprising a pressing cover ring, a first thimble, a spring, a second thimble, a thimble knob, a detection thimble, a detection thimble knob and an adjusting needle valve; a first interface is arranged at the upper end of the joint main body, a second interface is arranged at the lower end of the joint main body, and a detection interface is arranged at the side end of the joint main body. The dual-purpose joint suitable for mixed gas inflation and detection has a large-flow interface required for inflation and a small-flow interface required for gas quality detection, can complete the above functions alone or simultaneously, reduces the frequency of joint dismounting and mounting, and reduces the risk of leakage at the inflation and deflation interface of the gas chamber; in addition, a check valve is arranged at each interface, which can further prevent gas leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power maintenance, in particular to a dual-purpose joint suitable for mixed gas charging and detection. BACKGROUND

[0002] To implement the "double carbon" goal, State Grid is vigorously promoting the mixed gas reform to reduce SF6 gas emissions. If the mixed gas leaks, it will cause problems such as density drop, mixed ratio change, and excessive water and decomposition products in the gas, thereby affecting the insulation and arc extinguishing ability of the mixed gas. Currently, mixed gas power equipment operation and maintenance requires multiple detections after the charging process and after the charging is completed, including humidity detection, mixed ratio detection, density detection, etc. The operation process is more complex than SF6 electrical equipment operation and maintenance. The requirements for gas flow are very different for mixed gas charging and detection, and the special joints connected to the gas chamber charging and discharging interface are not universal, and the two work tasks often need to be performed alternately.

[0003] The detection instrument is relatively precise, and the front-end pressure is too high, which can easily damage the equipment, so the gas flow during the detection process cannot be too high, and a special joint is required to reduce the pressure of the gas in the isolation gas chamber; in addition, the special joint connected to the isolation gas chamber charging and discharging interface needs to be able to pass through a large flow of gas instantaneously to reduce the charging time and improve the operation and maintenance efficiency. Therefore, in the field operation work, the special joint needs to be frequently replaced, which is time-consuming and laborious, and increases the risk of leakage at the joint. SUMMARY

[0004] To solve the above problems, the present application provides a dual-purpose joint for mixed gas charging and detection, which has a large-flow charging interface and a small-flow detection interface with an adjusting needle valve, and the two interfaces can be connected to the corresponding equipment separately or simultaneously to complete the corresponding operation and maintenance work. The specific technical scheme is as follows:

[0005] A dual-purpose joint for mixed gas charging and detection, comprising a joint body, a first nut, a first non-return valve, a second nut, a second non-return valve, a detection interface nut, and a detection interface non-return valve; further comprising a compression cover ring, a first thimble, a spring, a second thimble, a thimble knob, a detection thimble, a detection thimble knob, and an adjusting needle valve.

[0006] The upper end of the joint body is provided with a first interface, the lower end of the joint body is provided with a second interface, and the side end of the joint body is provided with a detection interface; the first interface is connected to the pipeline to be charged through the first nut, and the second interface is connected to the isolation gas chamber through the second nut; the detection interface is connected to the detection instrument through the detection interface nut;

[0007] The first nut is connected with the first check valve through the extrusion cover ring, the first thimble and the spring, the second nut is connected with the second check valve through the second thimble and the thimble knob, and the detection interface nut is connected with the detection interface check valve through the detection thimble, the detection thimble knob and the regulating needle valve.

[0008] Further, the baffle is connected with the first nut and the first thimble.

[0009] Further, the first interface sealing cover and the detection interface sealing cover are further included.

[0010] Further, the detection interface sealing cover is made of plastic.

[0011] Compared with the prior art, the beneficial effects are:

[0012] The two-purpose joint suitable for mixed gas inflation and detection has a large-flow interface required for inflation and a small-flow interface required for gas quality detection, and can complete the above functions alone or simultaneously, reduces the frequency of joint loading and unloading, and reduces the risk of leakage at the inflation and deflation interface of the gas chamber; in addition, a check valve is arranged at each interface, which can further prevent gas leakage. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0014] Figure 1 It is a structure diagram of the two-purpose joint for mixed gas inflation and detection.

[0015] As shown in the figure: 101-first interface sealing cover, 102-extrusion cover ring, 103-baffle, 104-first nut, 105-first thimble, 106-spring, 107-first check valve, 108-detection thimble, 109-detection thimble knob, 110-regulating needle valve, 111-detection interface sealing cover, 112-detection interface check valve, 113-detection interface nut, 114-gas cavity, 115-thimble knob, 116-second thimble, 117-second nut, 118-second check valve. DETAILED DESCRIPTION

[0016] The embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0017] Following, the embodiments of the present disclosure are illustrated by specific examples, and other advantages and effects of the present disclosure can be easily understood by those skilled in the art from the disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The present disclosure can also be implemented or applied by other different specific embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0018] As shown in the drawings, a dual-purpose joint for mixed gas inflation and detection includes a joint body, a first nut 104, a first check valve 107, a second nut 117, a second check valve 118, a detection interface nut 113, and a detection interface check valve 112. It also includes a squeeze cover ring 102, a first thimble 105, a spring 106, a second thimble 116, a thimble knob 115, a detection thimble 108, a detection thimble knob 109, and an adjusting needle valve 110. Figure 1 The upper end of the joint body is provided with a first interface, the lower end of the joint body is provided with a second interface, and the side end of the joint body is provided with a detection interface. The first interface is connected to the pipeline to be inflated through the first nut 104, the second interface is connected to the isolation gas chamber through the second nut 117, and the detection interface is connected to the detection instrument through the detection interface nut 113.

[0019] The first nut 104 is connected to the first check valve 107 through the squeeze cover ring 102, the first thimble 105, and the spring 106, the second nut 117 is connected to the second check valve 118 through the second thimble 116 and the thimble knob 115, and the detection interface nut 113 is connected to the detection interface check valve through the detection thimble 108, the detection thimble knob 109, and the adjusting needle valve 110.

[0020] Specifically, during the process of connecting the inflation pipeline joint to the first nut 104 by clockwise rotation through threads, the squeeze cover ring 102 is slowly pushed, so that the first thimble 105 pushes the spring 106 to open the first check valve 107. Rotate the detection thimble knob 109 to connect it to the detection interface nut 113, and continue to slowly rotate to make the detection thimble 108 open the detection interface check valve 112; the adjusting needle valve 110 can be rotated to adjust the gas flow of the detection interface; the air cavity 114 and the second thimble 116 are in communication, and the second check valve 118 can be opened by rotating the thimble knob 115; the second nut 117 is connected to the inflation and deflation joint of the isolation gas chamber.

[0021]

[0022] ​In this embodiment, the baffle 103 is also included, which is connected with the first nut 104 and the first needle 105. The baffle 103 is mainly used to fix the first needle 105 of the inflation interface inside the first interface.

[0023] In this embodiment, the first interface sealing cover 101 and the detection interface sealing cover 111 are also included. The inflation interface sealing cover 101 has a sealing effect and needs to be sealed when the interface is idle. The detection interface sealing cover 111 has a function of preventing dust pollution.

[0024] In this embodiment, the detection interface sealing cover 111 is made of plastic, and the other parts are made of metal materials.

[0025] Specifically, a dual-purpose joint suitable for mixed gas inflation and detection is provided with three interfaces, which can be connected with the inflation pipeline and the detection pipeline respectively. The needle is translated and advanced by rotating the corresponding nut to open the two interfaces and the check valve inside the air chamber; the first interface is designed with a compression ring 102 and a spring 106, and the first check valve 104 is opened by rotating the first nut 104, and a baffle 103 is designed to fix the first needle 105; the detection interface is provided with an adjusting needle valve 110, which can further accurately control the gas flow.

[0026] A dual-purpose joint suitable for mixed gas inflation and detection is used as follows:

[0027] 1. Under the premise that the parts of the dual-purpose joint are not separated, rotate the detection interface nut 113 and the needle knob 115 counterclockwise to the bottom of the thread, and check whether the first nut 104 is sealed; if not, rotate clockwise to tighten;

[0028] 2. Remove the detection interface sealing cover 111 from the detection interface nut 113;

[0029] 3. If the inflation task is to be performed, including the task of inflation and detection at the same time, the first interface sealing cover 101 needs to be rotated counterclockwise first, and the pipeline to be inflated needs to be rotated clockwise and sealed to the first nut 104; if this task is not needed, this step is skipped;

[0030] 4. Rotate the second nut 117 clockwise and install it on the isolation air chamber inflation and deflation interface to ensure that it is sealed;

[0031] 5. Connect the detection interface nut 113 of the quick connector of the detection instrument, rotate the adjusting needle valve 110 according to the needs to control the gas flow, rotate clockwise to increase, and vice versa; if the detection task is not needed, this step is skipped;

[0032] 6. When disassembling, follow the order of first pulling out the quick connector of the testing instrument, then unscrewing the second nut 117 counterclockwise, and finally disassembling the inflation pipe by rotating it counterclockwise, and installing the first interface sealing cover 101; if there are no related tasks, skip the disassembly steps of the corresponding interface.

[0033] 7. After removing the connector, put the test interface sealing cap 11 on. The on-site disassembly of the special connector is now complete.

[0034] The present invention provides a dual-purpose connector suitable for filling and testing mixed gases. It has a high-flow-rate interface for filling and a low-flow-rate interface for gas quality testing. It can perform the above functions individually or simultaneously, reducing the frequency of connecting and disconnecting the connector and lowering the risk of leakage at the gas chamber filling and discharging interface. In addition, two check valves are designed inside to further prevent gas leakage.

[0035] In the description of this invention, it should be understood that the terms "middle," "length," "upper," "lower," "front," "rear," "vertical," "horizontal," "inner," "outer," "radial," "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] In this invention, unless otherwise expressly specified and limited, the first feature "on" the second feature may be in direct contact with the first and second features, or indirect contact with the first and second features through an intermediate medium. "A plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] The above description is merely illustrative of the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made without creative effort within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-purpose connector suitable for mixed gas inflation and detection, characterized in that, The joint body, the first nut, the first check valve, the second nut, the second check valve, the detection interface nut and the detection interface check valve are included. The upper end of the joint body is provided with a first interface, the lower end of the joint body is provided with a second interface, and the side end of the joint body is provided with a detection interface. The first interface is connected with a pipeline to be inflated through the first nut, the second interface is connected with an isolated air chamber through the second nut, and the detection interface is connected with a detection instrument through the detection interface nut.

2. The dual-purpose fitting for mixed gas inflation and detection according to claim 1, wherein, The first nut is connected with the first check valve through the extrusion cover ring, the first needle and the spring, the second nut is connected with the second check valve through the second needle and the needle knob, and the detection interface nut is connected with the detection interface check valve through the detection needle, the detection needle knob and the adjusting needle valve.

3. The dual-purpose fitting for mixed gas inflation and detection of claim 1, wherein, The baffle is connected with the first nut and the first needle.

4. The dual-purpose joint for mixed gas inflation and detection according to claim 3, wherein, The first interface sealing cover and the detection interface sealing cover are further included. The detection interface sealing cover is made of plastic.

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