Oil gun

Abstract

The utility model discloses an oil injection gun which comprises a first oil delivery pipe, a valve, a reducer union and an oil injection pipe, the first oil delivery pipe and the valve are arranged on the first oil delivery pipe, the reducer union is provided with a large-diameter end and a small-diameter end, the large-diameter end is arranged on the valve, and the oil injection pipe comprises a first pipe section, a bending section and a second pipe section which are sequentially connected. The first pipe section is connected with the small-diameter end of the reducer union, and the second pipe section is used for being inserted into an oil tank oil filling opening and can extend to the bottom of an oil tank. The bending part can change the output direction of the second pipe section for oiling, so that a worker can conveniently operate oiling at the side part of the oil tank without moving the whole oiling gun to the top of the transformer oil tank for oiling, the operation is convenient, and the second pipe section can extend into the bottom of the oil tank, so that discharged oil can enter from the lower part of the oil tank; therefore, air and oil in the tank are prevented from being severely sheared, air entrapment is reduced, and bubbles can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer production equipment, and in particular to an oil injection gun. Background Technology

[0002] As a key piece of equipment in the power system, the insulation performance of transformers directly affects the safe and stable operation of the power grid. Oil filling is a crucial step in transformer manufacturing and maintenance, and its quality directly impacts the transformer's insulation performance and service life. In existing technology, ordinary oil filling guns typically add oil directly to the transformer's oil tank filling port. This process often generates a large amount of foam, which not only reduces filling efficiency but may also lead to decreased insulation performance and even equipment failure. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an oil injection gun that can solve the problem of air bubbles generated during oil injection.

[0004] According to a first aspect of the present invention, an oil injection gun includes: a first oil supply pipe, a valve, a reducing connector, and an oil injection pipe. The first oil supply pipe has the valve disposed on it. The reducing connector has a large-diameter end and a small-diameter end, with the large-diameter end disposed on the valve. The oil injection pipe includes a first pipe section, a bent section, and a second pipe section connected in sequence. The first pipe section is connected to the small-diameter end of the reducing connector. The second pipe section is used to insert into the oil filling port of the oil tank and can extend to the bottom of the oil tank.

[0005] The oil injection gun according to the embodiment of this utility model has at least the following beneficial effects: the bent part can change the output direction of the second pipe section used for oil injection, which makes it convenient for personnel to operate oil injection from the side of the oil tank without having to move the entire oil injection gun to the top of the transformer oil tank for oil injection, which is convenient to operate. In addition, the second pipe section can extend into the bottom of the oil tank, so that the oil can enter from the bottom of the oil tank, avoiding severe shearing between air and oil in the tank, reducing air entrainment, and thus reducing the generation of air bubbles.

[0006] According to some embodiments of the present invention, when the second pipe section is inserted into the oil tank filling port, the bent section enables the second pipe section to be hung on the oil filling port.

[0007] According to some embodiments of the present invention, the bent section and the second pipe section can define a mounting portion, which is used to mount the tank to a mounting frame.

[0008] According to some embodiments of the present invention, the included angle between the first pipe segment and the second pipe segment is set to 40°-90°.

[0009] According to some embodiments of the present invention, a flow meter is provided between the valve and the first oil pipeline, and the flow meter is connected to the valve and the first oil pipeline via a quick connector.

[0010] According to some embodiments of the present invention, a vacuum sight glass component is also included, which is connected to the first oil supply pipe via a quick connector.

[0011] According to some embodiments of the present invention, the first oil delivery pipe is configured as a flexible hose.

[0012] According to some embodiments of the present invention, it further includes a second oil delivery pipe and a vacuum sight glass component. The second oil delivery pipe is a rigid pipe, and the vacuum sight glass component is disposed between the first oil delivery pipe and the second oil delivery pipe. The second oil delivery pipe is used to connect to the oil tank.

[0013] According to some embodiments of the present invention, the vacuum sight glass component is connected to the second oil pipeline via a quick-connect flange, and the vacuum sight glass component is connected to the first oil pipeline via a pagoda connector.

[0014] According to some embodiments of this utility model, the valve is configured as a manual ball valve.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a general schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the other direction;

[0019] Figure 3 This is an exploded view of the oil injection gun structure;

[0020] Figure 4 This is a schematic diagram of oil filling.

[0021] Figure label:

[0022] First oil pipeline 110, second oil pipeline 120;

[0023] Valve 200;

[0024] 300mm reducing fitting;

[0025] Oil injection pipe 400, first pipe section 410, bend section 420, second pipe section 430;

[0026] Tank body 500, mounting rack 510;

[0027] Flow meter 600;

[0028] Vacuum sight glass component 700, quick-connect flange 710, pagoda connector 720;

[0029] Fuel tank 800, fuel filler port 810. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Reference Figures 1 to 4According to a first aspect of the present invention, an oil injection gun includes a first oil supply pipe 110, a valve 200, a reducing connector 300, and an oil injection pipe 400. The first oil supply pipe 110 and the valve 200 are disposed on the first oil supply pipe 110. The reducing connector 300 has a large-diameter end and a small-diameter end, with the large-diameter end disposed on the valve 200. The oil injection pipe 400 includes a first pipe section 410, a bent section 420, and a second pipe section 430 connected in sequence. The first pipe section 410 is connected to the small-diameter end of the reducing connector 300. The second pipe section 430 is used to insert into the oil injection port 810 of the oil tank 800, and the second pipe section 430 can extend to the bottom of the oil tank 800. The bend can change the output direction of the second pipe section 430 used for oil injection, making it easier for personnel to operate the oil injection from the side of the oil tank 800 without having to move the entire oil injection gun to the top of the transformer oil tank 800 for oil injection. This facilitates operation. Furthermore, the second pipe section 430 can extend into the bottom of the oil tank 800, allowing the oil to enter from the bottom of the oil tank 800. This avoids severe shearing between the air and oil inside the tank, reduces air entrapment, and thus reduces the generation of air bubbles.

[0034] Specifically, foam formation primarily stems from the mixing and stabilization of gases in the oil. When transformer oil is subjected to violent agitation or rapid flow during the filling process, air is easily entrained into the oil, forming bubbles. These bubbles, under the influence of surfactants, form stable foam structures that are difficult to eliminate on their own. The presence of foam reduces the oil's insulation strength, increases the risk of partial discharge, and also affects the oil's heat dissipation performance. The filling speed is positively correlated with the amount of foam generated. High-speed filling leads to turbulent flow, generating severe shearing forces that entrain more air into the oil. Experiments show that when the filling speed exceeds a critical value, the amount of foam increases dramatically. Therefore, controlling the appropriate filling speed is crucial for reducing foam. Simultaneously, the design of the filling pipeline and the location of the filling also affect the oil flow pattern, thus influencing foam formation. In this embodiment, the first oil supply pipe 110 is used to connect to the oil tank. The valve 200 can control the oil injection on / off and control the oil injection flow rate by controlling the opening of the valve 200. The reducing joint 300 can connect the valve 200 to the small-diameter oil injection pipe 400. The special structure of the oil injection pipe 400 can reduce oil injection foaming and facilitate operation. The bending section 420 can bend the second pipe section 430 at a certain angle so that the operator can insert it into the oil injection port 810. The second pipe section 430 is extended so that the oil outlet of the second pipe section 430 can be close to the bottom of the transformer oil tank 800, which can reduce the impact between the oil outlet and the oil tank 800. Furthermore, the oil outlet of the second pipe section 430 can be submerged by the added oil, thereby achieving the effect of bottom inlet and top outlet. This can avoid the violent shearing between air and oil in the tank, reduce air entrainment, and thus reduce the generation of bubbles.

[0035] Reference Figures 1 to 4In some embodiments of this utility model, when the second pipe section 430 is inserted into the oil inlet 810 of the oil tank 800, the bent section 420 enables the second pipe section 430 to be hooked onto the oil inlet 810. Specifically, when the oil gun is inserted into the oil inlet 810, since the first pipe section 410 and the second pipe section 430 form a certain angle through the bent section 420, the second pipe section 430 can hook onto the oil inlet 810 after being inserted. On the one hand, this makes it convenient for the oil injection pipe 400 to be placed into the required oil inlet 810 of the transformer, etc. On the other hand, due to a certain lateral torque for hooking, the oil injection pipe 400 will not detach from the oil inlet 810 due to oil flow and pressure.

[0036] Reference Figures 1 to 2 In some embodiments of this utility model, the bent section 420 and the second pipe section 430 can define a mounting part, which is used to mount the tank body 500 on a mounting frame. Specifically, a mounting frame can be provided on the oil supply tank body 500, and the bent oil injection pipe 400 can be mounted on the mounting frame for easy storage of the oil injection gun, which can both improve the oil injection effect and facilitate storage.

[0037] In some embodiments of this utility model, the included angle between the first pipe section 410 and the second pipe section 430 is set to 40°-90°. Specifically, the first pipe section 410 and the second pipe section 430 can be bent at 45°. The operator can tilt the oil gun upward at 45° to insert the second pipe section 430 into the oil filling port 810, which makes it easier for the operator to apply force. After insertion, it can also be hung on the oil filling port 810.

[0038] It is understandable that the angle between the first pipe section 410 and the second pipe section 430 can also be set to 90°, which also allows the operator to insert the oil injection pipe 400 into the oil injection port 810 from the side.

[0039] Reference Figures 1 to 4 In some embodiments of this utility model, a flow meter 600 is provided between the valve 200 and the first oil delivery pipe 110. The flow meter 600 is connected to the valve 200 and the first oil delivery pipe 110 via a quick connector. Specifically, the flow meter 600 can be a digital display flow meter 600, which can intuitively measure the actual oil injection volume, thereby enabling the modification of corresponding process parameters in the control system to form a closed loop and become more intelligent. The quick connector structure facilitates the assembly and disassembly of the flow meter 600. The specific structure of the quick connector is not described in detail here.

[0040] Reference Figures 1 to 2In some embodiments of this utility model, a vacuum sight glass component 700 is also included, which is connected to the first oil supply pipe 110 via a quick connector. Specifically, the vacuum sight glass component 700 has a sight glass tube and a sealing connection component. The oil in the pipe can be directly observed through the vacuum sight glass component 700 to facilitate observation of the oil filling status. Furthermore, the vacuum sight glass component 700 can be connected via a quick connector for easy disassembly and maintenance.

[0041] Reference Figures 1 to 4 In some embodiments of this utility model, the first oil delivery pipe 110 is a flexible hose. Specifically, the flexible hose can be a steel wire-lined flexible hose to facilitate the movement of the oil injection gun and to facilitate connection with the oil injection port 810.

[0042] Reference Figures 1 to 2 In some embodiments of this utility model, a second oil delivery pipe 120 and a vacuum sight glass component 700 are also included. The second oil delivery pipe 120 is a rigid pipe, and the vacuum sight glass component 700 is located between the first oil delivery pipe 110 and the second oil delivery pipe 120. The second oil delivery pipe 120 is used to connect to the oil tank. Specifically, the second oil delivery pipe 120 can be a metal pipe connected to the oil tank, and the vacuum sight glass component 700 is connected to the rigid pipe, which can fix the position of the vacuum sight glass component 700 so as to stably observe the oil condition without being disturbed by the movement of the pipe.

[0043] Reference Figures 1 to 2 In some embodiments of this utility model, the vacuum sight glass component 700 is connected to the second oil supply pipe 120 via a quick-connect flange 710, and the vacuum sight glass component 700 is connected to the first oil supply pipe 110 via a pagoda connector 720. Specifically, the quick-connect flange 710 facilitates connection to the rigid second oil supply pipe 120, while the pagoda connector 720 facilitates connection between the rigid pipe and the flexible pipe.

[0044] Reference Figures 1 to 4 In some embodiments of this utility model, valve 200 is configured as a manual ball valve. The manual ball valve has a simple structure, opens and closes quickly, facilitates control of oil flow, and allows manual adjustment of the opening to control the oil flow rate, thus reducing the generation of air bubbles.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. An oil filling gun, characterized in that, include: First oil pipeline (110); A valve (200) is provided on the first oil pipeline (110); A reducing fitting (300) has a large diameter end and a small diameter end, wherein the large diameter end is located on the valve (200); The oil filling pipe (400) includes a first pipe section (410), a bent section (420) and a second pipe section (430) connected in sequence. The first pipe section (410) is connected to the small diameter end of the reducing connector (300). The second pipe section (430) is used to insert into the oil filling port (810) of the oil tank (800) and can extend to the bottom of the oil tank (800).

2. The oil injection gun according to claim 1, characterized in that, When the second pipe section (430) is inserted into the oil inlet (810) of the oil tank (800), the bent section (420) enables the second pipe section (430) to be hung on the oil inlet (810).

3. The oil injection gun according to claim 1, characterized in that, The bent section (420) and the second pipe section (430) define a mounting section for mounting on a rack of the tank body (500).

4. The oil injection gun according to claim 1, characterized in that, The angle between the first pipe section (410) and the second pipe section (430) is set to 40°-90°.

5. The oil injection gun according to claim 1, characterized in that, A flow meter (600) is provided between the valve (200) and the first oil pipeline (110), and the flow meter (600) is connected to the valve (200) and the first oil pipeline (110) through a quick connector.

6. The oil injection gun according to claim 1, characterized in that, It also includes a vacuum sight glass component (700), which is connected to the first oil pipe (110) via a quick connector.

7. The oil injection gun according to claim 1, characterized in that, The first oil pipeline (110) is a flexible hose.

8. The oil injection gun according to claim 7, characterized in that, It also includes a second oil delivery pipe (120) and a vacuum sight glass component (700). The second oil delivery pipe (120) is a rigid pipe. The vacuum sight glass component (700) is located between the first oil delivery pipe (110) and the second oil delivery pipe (120). The second oil delivery pipe (120) is used to connect to the oil tank.

9. The oil injection gun according to claim 8, characterized in that, The vacuum sight glass component (700) is connected to the second oil pipeline (120) via a quick-connect flange (710), and the vacuum sight glass component (700) is connected to the first oil pipeline (110) via a pagoda connector (720).

10. The oil injection gun according to claim 1, characterized in that, The valve (200) is a manual ball valve.

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