Gas taking box structure

Abstract

The utility model provides a kind of gas taking box structure, belong to gas taking box technical field, including box body, the outer wall of box body is provided with and is connected with the branch pipeline of equipment to be examined, and each interface of branch pipeline is connected with the inner chamber of box body, and each interface of branch pipeline is provided with the sealing butt joint convex ring fixed in the outer wall of box body, and the bottom of sealing butt joint convex ring is uniformly attached and is provided with the trapezoidal support fixed on box body, when needing to take gas, the oil drain port below is opened, and transformer oil in box is discharged, gas relay in gas is under the action of oil pressure along with gas leading soft copper pipe into gas collection box, then oil drain port is closed, at this time, transformer oil will be filled again through bottom pipeline gas taking box. Gas taking box is usually linked with gas relay, when gas amount reaches threshold value, relay contact acts, triggers alarm or trip.

Description

Technical Field

[0001] This utility model relates to the field of gas extraction box technology, specifically a gas extraction box structure. Background Technology

[0002] In the operation and maintenance of oil-filled electrical equipment such as transformers and reactors, the aging or failure of the insulating oil and insulating materials inside the equipment will produce characteristic gases. Collecting these gases and analyzing their composition and content is the core means of judging the health status of the equipment.

[0003] The related technology (announcement number: CN208239154U) discloses a gas sampling device for a gas relay gas delivery box. The disclosed technical solution is that the effective cooperation of the rubber cap, double-ended needle, sealing gasket and sealing cap enhances the sealing performance of the entire gas sampling device and improves the quality of the gas sample. The effective cooperation of the plastic clip, metering rod and syringe ensures that the gas sample can be quantitatively obtained, reducing the degassing step in subsequent chromatographic experiments.

[0004] The above-disclosed technical solutions have the following problems: traditional gas sampling boxes only have gas collection functions and cannot be linked with the equipment's protection devices (such as gas relays). When the gas volume inside the equipment reaches the fault threshold, it needs to be detected by manual inspection, which delays the fault warning time. In addition, there are no status indicators such as abnormal oil level or overflow, which rely on regular manual inspection, increasing the workload of maintenance personnel and posing a risk of missed detection. In response, we have proposed a new type of gas sampling box structure.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Utility Model Content

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies, and its specific technical solution is as follows:

[0007] A gas sampling box structure includes a box body. The outer wall of the box body is provided with branch pipes that are connected to the device under test. Each interface of the branch pipes is connected to the inner cavity of the box body. Each interface of the branch pipes is provided with a sealing engagement protrusion fixed to the outer wall of the box body. The bottom of the sealing engagement protrusion is fitted with a trapezoidal support fixed to the box body. The side wall of the box body has a recessed observation port in the shape of an annular step, and the recessed observation port is used to embed a sealing element.

[0008] In the above technical solution, the branch pipeline includes a trip output port that is connected to the connecting pipe of the gas relay.

[0009] The branch pipeline also includes an air intake port and an oil drain port, with the oil drain port located independently on one side of the box, and the trip output port and the air intake port located on the same side.

[0010] Connecting ears are provided at the bottom corners of the box, extending outwards.

[0011] The box body, sealing and mating protrusion ring, trapezoidal support, and connecting ear are integrally formed.

[0012] The inner wall of the box is fixedly connected to a spring-shaped traction rope, and the other end of the traction rope is fixedly connected to a float.

[0013] An overflow slide bar is provided on the inner wall of the box body away from the traction rope. A cover sleeve is fixed to the outer wall of the box body and is fitted outside the overflow slide bar. An anti-overflow indicator component is provided between the cover sleeve and the inner wall of the cover sleeve.

[0014] The overflow warning assembly includes a warning element fixed to the outer wall of the cover, a movable contact electrically connected to the warning element at one end of the overflow slide rod, a fixed contact opposite to the movable contact fixed to the inner wall of the cover, and the inner wall of the cover and the overflow slide rod are connected by an elastic element.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The trip output port in the branch pipeline can be directly connected to the gas relay to realize the linkage between the gas take-up box and the equipment protection device: when the gas relay detects that the amount of gas inside the equipment reaches the fault threshold, it can trigger an alarm or trip signal through the trip output port, eliminating the need for manual inspection, shortening the fault response time, and improving the safety of equipment operation.

[0017] II. The layout of the branch pipelines (the trip output port and the gas intake port are on the same side, and the oil drain port is set independently) not only conforms to the pipeline connection logic of the transformer gas relay, but also avoids pipeline cross-interference, ensures smooth gas and oil circuits, and the inner wall of the gas intake port is smooth to reduce gas flow resistance, ensure gas collection efficiency, and avoid sample cross-contamination caused by gas residue.

[0018] Third, the sealing ring on the outer wall of the box fits precisely with the pipeline interface, and the trapezoidal support provides support at the joint. This not only improves the stability of the pipeline connection, but also effectively prevents gas leakage and transformer oil seepage under high-voltage conditions through the double sealing of the ring and the sealing gasket, ensuring the purity of the collected gas samples and providing an accurate data basis for subsequent testing and analysis. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a gas extraction box according to the present invention. Figure I ;

[0020] Figure 2 This is a schematic diagram of the structure of a gas extraction box according to the present invention. Figure II ;

[0021] Figure 3 This is a structural cross-sectional view of the box body portion of this utility model;

[0022] Figure 4 for Figure 3 A magnified view of part A;

[0023] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-box body, 2-sealing mating protrusion ring, 3-trapezoidal support, 4-recessed observation port, 5-trip output port, 6-air intake interface, 7-oil drain port, 8-connecting ear, 9-traction rope, 10-float ball, 11-overflow slide bar, 12-cover, 13-indicator, 14-moving contact, 15-fixed contact, 16-elastic component. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The following are specific implementation cases and appendices. Figure 1-4 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0026] A gas sampling box structure includes a box body 1. The outer wall of the box body 1 is provided with branch pipes that are connected to the equipment to be tested, and each interface of the branch pipes is connected to the inner cavity of the box body 1. The box body 1 is cubic in shape. Each interface of the branch pipes is provided with a sealing engagement protrusion ring 2 fixed to the outer wall of the box body 1, and the bottom of the sealing engagement protrusion ring 2 is fitted with a trapezoidal support 3 fixed to the box body 1. The sealing engagement protrusion ring 2 improves the sealing performance between the sealing engagement ring 2 and the box body 1.

[0027] The trapezoidal support 3 improves the stability of the pipe connection. The width of the annular step of the recessed observation port is 2-5mm, and the step height is 1-3mm to accommodate the installation of conventional sealing gaskets. The side wall of the housing 1 has an annular stepped recessed observation port 4, which is used to install a sealing element. The sealing element can be a graduated transparent observation window. This allows observation of the oil level inside the housing 1.

[0028] The gas extraction box is typically installed in the lower middle part of the transformer. One end of the trip output port 5 is led out from the gas relay's side vent via a flexible copper vent pipe. Normally, the gas extraction box is filled with transformer oil. When gas extraction is needed, the lower drain port 7 is opened to release the transformer oil. Gas accumulated in the gas relay, under oil pressure, flows through the flexible copper vent pipe into the gas extraction box. Afterward, the drain port 7 is closed, and the transformer oil refills the gas extraction box through the bottom pipeline. The gas extraction box is usually linked to the gas relay. When the gas volume reaches a threshold, the relay contacts actuate, triggering an alarm or tripping.

[0029] The branch pipeline includes a trip output port 5 connected to the connecting pipe of the gas relay. The branch pipeline also includes a gas intake port 6 and an oil drain port 7. The oil drain port 7 is located independently on one side of the box 1, and the trip output port 5 and the gas intake port 6 are located on the same side.

[0030] The diameter of the air intake port 6 is 5-15mm, and the inner wall of the air intake port 6 is a smooth cylindrical surface with a surface roughness Ra≤1.6μm.

[0031] It is worth noting that connecting ears 8 are provided at the bottom corners of the box body 1, extending outwards. The air extraction box is installed in the corresponding position through the connecting ears 8 at the four corners.

[0032] In addition, the box body 1, the sealing and docking protrusion ring 2, the trapezoidal support 3, and the connecting ear 8 are all integrally molded. The integrally molded structure is easy to process and can also improve the overall stability.

[0033] In addition, a spring-shaped traction rope 9 is fixed to the inner wall of the box 1, and a float 10 is fixed to the other end of the traction rope 9. The internal oil level can be clearly understood by observing the position of the float 10 inside.

[0034] Furthermore, an overflow slide bar 11 is provided on the inner wall of the box body 1 away from the traction rope 9, penetrating the box body 1. A cover 12 is fixedly connected to the outer wall of the box body 1, which is fitted over the overflow slide bar 11, and an anti-overflow indicator component is provided between the cover 12 and its inner wall. The overflow slide bar 11 and the traction rope 9 are located on both sides of the air intake box, and the satisfied slide bar 11 slides within the through hole in the side wall of the box body 1. The cover 12 covers the outside of the satisfied slide bar 11 extending out of the box body 1.

[0035] The overflow warning assembly includes a warning element 13 fixed to the outer wall of the cover 12. One end of the overflow slide 11 is fixedly connected to a movable contact 14 electrically connected to the warning element 13. A fixed contact 15, opposite to the movable contact 14, is fixedly connected to the inner wall of the cover 12. The inner wall of the cover 12 and the overflow slide 11 are connected by an elastic element 16. Both the movable contact 14 and the fixed contact 15 are metallic conductors. The warning element 13 can be an indicator light, which is electrically connected to the movable contact 14. The fixed contact 15 is electrically connected to an external power source via a wire.

[0036] When the air intake box is filled with oil, push the satisfaction slide 11 to slide, so that the satisfaction slide 11 drives the moving contact 14 to the fixed contact 15. At this time, the indicator 13 will sound an alarm to prevent oil from overflowing from the pipeline branch pipe.

[0037] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 utility model.

[0038] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection 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 utility model according to the specific circumstances.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas extraction box structure, comprising a box body (1), characterized in that: The outer wall of the box (1) is provided with branch pipes that are connected to the equipment to be inspected, and each interface of the branch pipes is connected to the inner cavity of the box (1). Each interface of the branch pipes is provided with a sealing and docking protrusion ring (2) fixed to the outer wall of the box (1), and the bottom of the sealing and docking protrusion ring (2) is fitted with a trapezoidal support (3) fixed to the box (1). The side wall of the box (1) is provided with a recessed observation port (4) in the shape of an annular step, and the recessed observation port (4) is used to embed a sealing element.

2. The gas extraction box structure according to claim 1, characterized in that: The branch pipeline includes a trip output port (5) that is connected to the connecting pipe of the gas relay.

3. The gas extraction box structure according to claim 1, characterized in that: The branch pipeline also includes an air intake port (6) and an oil drain port (7), and the oil drain port (7) is independently located on one side of the box (1), and the trip output port (5) is located on the same side as the air intake port (6).

4. The gas extraction box structure according to claim 1, characterized in that: Connecting ears (8) are provided at the bottom corners of the box (1) and extend outwards.

5. The gas extraction box structure according to claim 1, characterized in that: The box body (1), sealing and docking protrusion (2), trapezoidal support (3) and connecting ear (8) are integrally formed.

6. The gas extraction box structure according to claim 1, characterized in that: The inner wall of the box (1) is fixed with a spring-shaped traction rope (9), and the other end of the traction rope (9) is fixed with a float (10).

7. The gas extraction box structure according to claim 1, characterized in that: An overflow slide bar (11) is provided on the inner wall of the box body (1) away from the traction rope (9). An overflow warning component is provided between the box body (1) and the outer wall of the box body (1).

8. The gas extraction box structure according to claim 7, characterized in that: The overflow warning assembly includes a warning element (13) fixed to the outer wall of the cover (12), one end of the overflow slide rod (11) is fixed to a moving contact (14) electrically connected to the warning element (13), the inner wall of the cover (12) is fixed to a fixed contact (15) opposite to the moving contact (14), and the inner wall of the cover (12) and the overflow slide rod (11) are connected by an elastic element (16).

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