CN109268592B - A connecting device suitable for transformer oil drain valve - Google Patents

Abstract

The invention provides a connecting device suitable for an oil drain valve of a transformer, which is used for connecting the flange of the oil drain valve with an oil pipe, and comprises a flange fixing clamp, a flange connector, a sealing gasket and an adapter, wherein the flange fixing clamp comprises a clamping body, a cantilever, a locking screw and a rotary wrench, the flange connector comprises a connecting flange and a connecting pipe, the connecting flange is coaxially and fixedly connected with the connecting pipe, the connecting flange is fixedly connected with the flange of the oil drain valve through at least two groups of flange fixing clamps, the sealing gasket is arranged between the flange of the oil drain valve and the connecting flange, and the adapter comprises a connecting pipe joint end for connecting the connecting pipe and an oil pipe joint end for connecting the oil pipe. The invention provides a connecting device suitable for a transformer oil drain valve, which can be suitable for various types of transformer oil drain valves and realize quick connection between an oil drain valve flange and an oil pipe.

Description

A connecting device suitable for transformer oil drain valve

Technical field

The present invention relates to a pipeline connection device, and in particular to a connection device suitable for a transformer oil drain valve.

Background technique

Depending on the actual situation of the transformer in the substation, due to different manufacturers and different models, the diameter of the oil drain valve flange is different, and the center distance of the screw hole is also different. When performing oil filling and draining work, the valve port There is no uniform size for the connected external flange, and multiple types of external flanges need to be prepared. Due to the diversity of the external flange, the diameter of the oil outlet pipe is different, which leads to the need to prepare a variety of oil pipes suitable for different diameters and different models at the same time during actual oil filling and discharge. This results in inconvenient operation, easy oil leakage, heavy workload, and low efficiency during the entire operation.

Contents of the invention

The object of the present invention is to provide a connection device suitable for a transformer oil drain valve, which can be applied to various types of transformer oil drain valves and realize quick connection between the oil drain valve flange and the oil pipe.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A connecting device suitable for a transformer oil drain valve. The connecting device connects the oil drain valve flange and the oil pipe. The connecting device includes a flange fixing fixture, a flange connector, a sealing gasket and an adapter. The flange The fixed clamp includes a card body, a cantilever, a locking screw and a rotating wrench. The card body is L-shaped. The card body includes a first card body arm and a second card body arm. One end of the cantilever arm is fixedly connected to the second card body arm. , the other end of the cantilever is threadedly connected to the locking screw, the rotating wrench is fixedly connected to one end of the locking screw and is perpendicular to the locking screw, the other end of the locking screw is provided with a first locking seat, and the first locking seat The body arm is provided with a second locking seat at the end. The flange connector includes a connecting flange and a connecting pipe. The connecting flange and the connecting pipe are coaxially fixedly connected. The connecting flange and the oil drain valve flange pass through at least two The set of flange fixing clamps is fixedly connected, the sealing gasket is provided between the oil drain valve flange and the connecting flange, the adapter includes a connecting pipe joint end for connecting the connecting pipe and The oil pipe joint end is used to connect the oil pipe. The inner diameter of the connecting pipe joint end is 0.3mm-0.8mm larger than the outer diameter of the connecting pipe. There are at least two self-locking handles on the outside of the connecting pipe joint end. At least two self-locking handles are provided along the The adapter is evenly arranged around the circumference. The head of the self-locking handle is cylindrical or spherical. The head of the self-locking handle is eccentrically hinged on the adapter through the hinge axis. When the self-locking handle is rotated, the head of the self-locking handle is in contact with the outer wall of the adapter. Separate or press together, an annular sealing ring installation groove is provided at the end of the connecting pipe, and a sealing ring is installed in the sealing ring installation groove.

Further, a gasket mounting groove is provided on the gasket mounting surface of the connecting flange, and a plurality of first ratchet rings are provided in the gasket mounting groove along the radial direction.

Further, the outer diameter of the oil pipe joint end is equal to the inner diameter of the oil pipe, the oil pipe joint end is inserted into the oil pipe, and a plurality of second ratchet rings are provided on the outer wall of the oil pipe joint end along the axial direction.

Further, the connecting flange and the oil drain valve flange are fixedly connected through six sets of flange fixing clamps, and the six sets of flange fixing clamps are evenly arranged along the circumferential direction of the connecting flange and the oil drain valve flange.

Further, the sealing ring is an O-ring.

After adopting the above technical solution, the present invention has the following advantages:

1. Install the sealing gasket between the connecting flange and the oil drain valve flange, and attach the connecting flange and the oil drain valve flange to each other, and then clamp the flange fixing clamp between the connecting flange and the oil drain valve. On the flange, by turning the rotating wrench, the locking screw is tightened, so that the first locking seat of the locking screw and the second locking seat of the card body press the connecting flange and the oil drain valve flange, and then the adapter The joint end of the connecting pipe is connected to the connecting pipe, and the oil pipe joint end of the adapter is connected to the oil pipe, thus completing the quick connection between the oil drain valve flange and the oil pipe. In the prior art, the oil drain valve flange and the connecting flange are connected by bolts. The oil drain valve flange diameters are different and the screw hole center distances are different. When performing oil filling and draining work, the connecting flange connected to the valve port is not unified. size, multiple types of flange connectors need to be prepared, and in the present invention, the connecting flange of the flange connector and the oil drain valve flange are fixed through at least two sets of flange fixing clamps, without the need for bolting. Therefore, the present invention The flange connector can be applied to the oil drain valves of various types of transformers, avoiding the need to prepare multiple types of flange connectors, and enabling quick disassembly and assembly of the flange connectors.

The inner diameter of the connecting pipe joint end is 0.3mm-0.8mm larger than the outer diameter of the connecting pipe. After installing the sealing ring in the sealing ring installation groove of the connecting pipe, insert the connecting pipe into the connecting pipe joint end, and rotate the self-locking handle to connect the pipe joint end. The extruded diameter is reduced, and the sealing ring is compressed to seal between the adapter and the connecting pipe.

2. A sealing gasket mounting groove is provided on the gasket mounting surface of the connecting flange, and a number of first ratchet rings are arranged in the radial direction in the gasket mounting groove. The gasket installation groove can prevent the gasket from slipping and ensure good sealing performance of the gasket. A plurality of first ratchet rings are provided to increase the friction between the connecting flange and the sealing gasket on the one hand to prevent the sealing gasket from slipping, and on the other hand to lock the overflowing oil layer by layer, thereby improving the efficiency of the present invention. The role of sealing between the connecting flange and the drain valve flange.

3. The outer diameter of the oil pipe joint end is equal to the inner diameter of the oil pipe. The oil pipe joint end is inserted into the oil pipe. A number of second ratchet rings are provided on the outer wall of the oil pipe joint end along the axial direction. After the oil enters between the second ratchet rings, it is locked layer by layer by the second ratchet rings to achieve a sealing effect between the adapter and the oil pipe.

4. The connecting flange and the oil drain valve flange are fixedly connected through six sets of flange fixing clamps, and the six sets of flange fixing clamps are evenly arranged along the circumferential direction of the connecting flange and the oil drain valve flange. The connecting flange and oil drain valve flange are evenly stressed along the circumference, and are firmly fixed and have good sealing performance.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings:

Figure 1 is a schematic structural diagram of a connection device suitable for a transformer oil drain valve according to the present invention.

Figure 2 is a top view of a connecting device suitable for a transformer oil drain valve according to the present invention.

Figure 3 is a partial enlarged view of position A in Figure 1.

Figure 4 is a partial enlarged view of B in Figure 1.

Figure 5 is a partial enlarged view of C in Figure 1.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 5, the present invention provides a connection device suitable for a transformer oil drain valve. The connection device connects the oil drain valve flange 1 and the oil pipe 7. The connection device includes a flange connector 4, a sealing gasket 3, Adapter 5 and flange fixing clamp 2.

The flange connector 4 includes a connecting flange 41 and a connecting pipe 42. The connecting flange 41 and the connecting pipe 42 are coaxially connected. The connecting flange 41 and the oil drain valve flange 1 are fixedly connected through at least two sets of flange fixing clamps 2. . In this embodiment, the connecting flange 41 and the oil drain valve flange 1 are fixedly connected through six sets of flange fixing clamps 2. As shown in Figure 2, the six sets of flange fixing clamps 2 are fixed along the connecting flange 41 and the oil drain valve flange 1. The flange 1 is evenly arranged in the circumferential direction, so that the connecting flange and the oil drain valve flange are evenly stressed along the circumference, and are firmly fixed and have good sealing performance.

A sealing gasket 3 is provided between the oil drain valve flange 1 and the connecting flange 41 . In this embodiment, as shown in FIGS. 1 and 3 , a gasket mounting groove 411 is provided on the gasket mounting surface of the connecting flange 41 , and a plurality of first ratchet rings 412 are provided in the gasket mounting groove 411 along the radial direction. . The gasket installation groove can prevent the gasket from slipping and ensure good sealing performance of the gasket. A plurality of first ratchet rings are provided to increase the friction between the connecting flange and the sealing gasket on the one hand to prevent the sealing gasket from slipping, and on the other hand to lock the overflowing oil layer by layer, thereby improving the efficiency of the present invention. The role of sealing between the connecting flange and the drain valve flange.

The flange fixing fixture 2 includes a card body 21, a cantilever 22, a locking screw 23 and a rotating wrench 24. The card body 21 is L-shaped. The card body 21 includes a first card body arm 211 and a second card body arm 212. The cantilever arm 22 One end is fixedly connected to the second card body arm 212, the other end of the cantilever 22 is threadedly connected to the locking screw 23, the rotating wrench 24 is fixedly connected to one end of the locking screw 23 and is perpendicular to the locking screw 23, and the locking screw 23 The other end is provided with a first locking seat 231, and the first card body arm 211 is provided with a second locking seat 213 at the end. After the rotating wrench 24 is rotated, the first locking seat 231 and the second locking seat 213 are clamped together. Tightly connect flange 41 and oil drain valve flange 1.

The adapter 5 includes a connecting pipe joint end 51 and an oil pipe joint end 52. The inner diameter of the connecting pipe joint end 51 is 0.3mm-0.8mm larger than the outer diameter of the connecting pipe 42. The connecting pipe 42 is inserted into the connecting pipe joint end 51; the outer diameter of the oil pipe joint end 52 is The diameter is equal to the inner diameter of the oil pipe 7, and the oil pipe joint end 52 is inserted into the oil pipe 7.

As shown in Figures 1 and 4, at least two self-locking handles 53 are provided outside the connecting pipe joint end 51. The self-locking handles 53 are evenly arranged along the circumferential direction of the adapter 5, and the heads of the self-locking handles 53 are cylindrical. Or spherical, the head of the self-locking handle 53 is eccentrically hinged on the adapter 5 through the hinge axis. When the self-locking handle 53 is rotated, the head of the self-locking handle 53 separates or presses together with the outer wall of the adapter 5 . An annular sealing ring installation groove 421 is provided at the end of the connecting pipe 42. The sealing ring 8 is installed in the sealing ring installation groove 421. After the connecting pipe 42 is inserted into the connecting pipe joint end 51, the self-locking handle 53 is rotated to connect the connecting pipe joint end 51. The extruded diameter is reduced, and the sealing ring 8 is pressed to achieve a sealing effect between the adapter 5 and the connecting pipe 42 .

In this embodiment, the sealing ring 8 is an O-ring.

As shown in Figures 1 and 5, the outer wall of the oil pipe joint end 52 is provided with a number of second ratchet rings 521 along the axial direction. After the oil enters between the second ratchet rings 521, it is locked layer by layer by the second ratchet rings 521. , to play a sealing role between the adapter 5 and the oil pipe 7.

The present invention fixes the connecting flange of the flange connector and the oil drain valve flange through at least two sets of flange fixing clamps without requiring bolt connection. Therefore, the flange connector of the present invention can be suitable for the discharge of various types of transformers. The oil valve avoids the fact that the flange diameter of the oil drain valve is different and the center distance of the screw hole is different. When filling and draining oil, the connecting flange connected to the valve port does not have a uniform size, and multiple types of flange connectors need to be prepared. Case.

In addition to the above preferred embodiments, the present invention also has other embodiments. Those skilled in the art can make various changes and deformations according to the present invention. As long as they do not deviate from the spirit of the present invention, they shall all fall within the scope of the invention as defined by the appended claims. scope.

Claims (5)

1. The connecting device suitable for the oil drain valve of the transformer is connected with an oil drain valve flange (1) and an oil pipe (7), and is characterized in that the connecting device comprises a flange fixing clamp (2), a flange connector (4), a sealing gasket (3) and an adapter (5), the flange fixing clamp comprises a clamping body (21), a cantilever (22), a locking screw (23) and a rotating spanner (24), the clamping body is L-shaped, the clamping body comprises a first clamping body arm (211) and a second clamping body arm (212), one end of the cantilever is fixedly connected to the second clamping body arm, the other end of the cantilever is in threaded connection with the locking screw, the rotating spanner is fixedly connected to one end of the locking screw and is perpendicular to the locking screw, the other end of the locking screw is provided with a first locking seat (231), the first clamping body arm is provided with a second locking seat (213) at the end part, the flange connector comprises a connecting flange (41) and a connecting pipe (42), the connecting flange is fixedly connected with the oil drain valve flange through at least two groups of flange fixing clamps, the sealing gasket is arranged between the sealing gasket and the connecting pipe connector and the connecting pipe end (3) is at least one end of the connecting pipe (3 mm-connecting pipe end is connected with the connecting pipe end (52 mm) at the outer diameter of the connecting pipe end of the connecting pipe (0), at least two self-locking handles are evenly arranged along the circumferential direction of the adapter, the heads of the self-locking handles are cylindrical or spherical, the heads of the self-locking handles are eccentrically hinged to the adapter through hinge shafts, the self-locking handles are rotated, the heads of the self-locking handles are separated or pressed with the outer wall of the adapter, annular sealing ring mounting grooves are formed in the end portions of the connecting pipes, and sealing rings (8) are mounted in the sealing ring mounting grooves.

2. The connecting device for the transformer oil drain valve according to claim 1, wherein a gasket mounting groove (411) is formed in a gasket mounting surface of the connecting flange, and a plurality of first ratchet rings (412) are radially arranged in the gasket mounting groove.

3. The connecting device for the transformer oil drain valve according to claim 1, wherein the outer diameter of the oil pipe joint end is equal to the inner diameter of the oil pipe, the oil pipe joint end is inserted into the oil pipe, and a plurality of second ratchet rings (521) are axially arranged on the outer wall of the oil pipe joint end.

4. The connecting device for the oil drain valve of the transformer according to claim 1, wherein the connecting flange is fixedly connected with the oil drain valve flange through six groups of flange fixing clamps, and the six groups of flange fixing clamps are uniformly arranged along the circumferential directions of the connecting flange and the oil drain valve flange.

5. The connecting device for a transformer oil drain valve according to claim 1, wherein the sealing ring is an O-ring.