Sealing detection device for oil-immersed transformer

Abstract

The utility model provides an oil-immersed transformer sealing detection device, which belongs to the technical field of oil-immersed transformer sealing detection and comprises a mounting seat and a gas filling pipe arranged on the mounting seat, a filling head is arranged at the exhaust end of the gas filling pipe, and a one-way valve is arranged at one end, close to the gas filling pipe, of an inner cavity of the filling head. A pressure gauge and an exhaust valve are arranged at the positions, close to the one-way valve, of the outer portion of the filling head, a sealing mechanism used for sealing the gap between the oil filling port of the oil-immersed transformer and the filling head is further arranged on the filling head, and the sealing mechanism comprises a fixing ring arranged at the position, close to the air outlet, of the outer arc face of the filling head. A locking cover movably sleeves one end outside the filling head close to the gas filling pipe; and a sealing cover is in threaded connection with the outer arc surface of the filling head close to the gas outlet. Through the sealing mechanism, the oil filling device can adapt to oil filling ports of oil-immersed transformers of different specifications, the application range of equipment is greatly widened, the operation difficulty is reduced, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oil -immersed transformer sealing detection technical field, concretely relates to a kind of oil -immersed transformer sealing detection device. BACKGROUND

[0002] Oil-immersed transformer is a common power transformer type, widely used in power system. Its main feature is to fill insulation oil between the core and winding of transformer to improve insulation performance and heat dissipation effect. Currently, oil-immersed transformer needs to use special oil-immersed transformer sealing detection when in use to detect it.

[0003] The existing oil-immersed transformer sealing detection device usually connects the filling head with the oil filling port of the transformer, then pumps air into the transformer, and judges the sealing effect of the transformer by observing the reading change of the pressure gauge. Although this method can realize basic sealing detection, there are still some problems in actual use. When dealing with oil filling ports of different specifications of oil-immersed transformers, effective detection cannot be carried out, which limits the application range of the equipment. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides an oil-immersed transformer sealing detection device, which can adapt to oil filling ports of different specifications of oil-immersed transformers through the sealing mechanism, greatly improves the application range of the equipment, reduces the operation difficulty and improves the work efficiency.

[0005] To solve the above technical problems, the utility model provides an oil-immersed transformer sealing detection device, which comprises a mounting seat and a gas filling pipe arranged on the mounting seat. The exhaust end of the gas filling pipe is provided with a filling head. The inner cavity of the filling head near the gas filling pipe is provided with a one-way valve. The outside of the filling head near the one-way valve is respectively provided with a pressure gauge and an exhaust valve. The filling head is also provided with a sealing mechanism for sealing the gap between the oil filling port of the oil-immersed transformer and the filling head. The sealing mechanism can adapt to oil filling ports of different specifications of oil-immersed transformers, greatly improves the application range of the equipment, reduces the operation difficulty and improves the work efficiency.

[0006] The sealing mechanism comprises a fixing ring arranged on the outer arc surface of the filling head near the gas outlet. The outer end of the filling head near the gas filling pipe is movably sleeved with a locking cover. The outer arc surface of the filling head near the gas outlet is threadedly connected with a sealing cover. The side of the sealing cover near the gas outlet of the filling head is provided with an annular groove. The annular groove is provided with an annular gasket. The gap between the oil filling port of the oil-immersed transformer and the filling head is sealed, gas leakage is effectively prevented, and the accuracy of detection is improved.

[0007] The sealing mechanism further comprises sealing pads arranged on the inner and outer diameter arcs of the annular groove, which further seals the gap between the oil filling port and the filling head.

[0008] It also includes a sealing assembly, which is used to seal the gap between the fixing ring and the sealing cover. The sealing assembly includes a first gasket disposed on the side of the fixing ring near the sealing cover, and a second gasket disposed on the side of the sealing cover near the fixing ring. The second gasket is configured to cooperate with the first gasket so that the second gasket and the first gasket fit tightly together to seal.

[0009] The lower part of the mounting base is equipped with a shelf, which makes it convenient for relevant personnel to place the filling head.

[0010] The inner diameter of the locking cap is larger than the diameter of the retaining ring, while the inner diameter of the sealing cap is smaller than the diameter of the retaining ring, thus ensuring that the sealing cap is screwed in place.

[0011] The axial section of the contact area between washer two and washer one is serrated, which further improves the sealing effect between the retaining ring and the sealing cap.

[0012] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0013] 1. Based on the specifications of the oil-immersed transformer's filler port, select a locking cover and a sealing cover of appropriate diameter. Then, movably fit the selected locking cover onto the end of the filling head near the gas filling pipe. Next, thread the sealing cover onto the filling head. Then, insert the gas outlet of the filling head into the oil-immersed transformer's filler port. At this time, the oil-immersed transformer's filler port will enter the annular groove and be positioned between the two sealing gaskets. Simultaneously, the filler port will abut against the annular gasket. Then, thread the locking cover onto the oil-immersed transformer's filler port and tighten it. At this time, the locking cover presses against the sealing cover, thereby deforming the sealing gasket and the annular gasket, sealing the oil-immersed transformer's filler port and the filling head, effectively preventing gas leakage, improving the accuracy of detection, and adapting to oil-immersed transformer filler ports of different specifications. This greatly expands the applicability of the equipment, reduces the difficulty of operation, and improves work efficiency.

[0014] 2. Subsequently, gas is supplied into the gas supply pipe through an external gas supply unit. The gas is injected into the oil-immersed transformer through a one-way valve and a filling head. Then, the pressure gauge is observed. Once the pressure inside the oil-immersed transformer reaches the set value, the external gas supply unit stops supplying gas. After a period of time, the pressure gauge reading is observed to see if it decreases. If the pressure gauge reading remains stable for a period of time, it indicates that the oil-immersed transformer is well sealed. If the pressure gauge reading decreases, it indicates that there is a leak. After the test is completed, the exhaust valve is opened to release the excess gas. Then, the above steps are reversed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of an oil-immersed transformer sealing detection device according to the present invention;

[0016] Figure 2The sectional view structure schematic diagram of the utility model;

[0017] Figure 3 The A place amplification structure schematic diagram of the utility model;

[0018] Figure 4 The B place amplification structure schematic diagram of the utility model.

[0019] Mark 100, mounting seat; 101, gas pipe; 102, filling head; 103, check valve; 104, pressure gauge; 105, exhaust valve; 200, fixing ring; 201, locking cover; 202, sealing cover; 203, annular groove; 204, annular pad; 205, sealing pad; 300, washer one; 301, washer two; 400, placing rack. Specific embodiments

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the following will combine the drawings of the embodiments of the utility model Figures 1-4 The technical scheme of the embodiments of the utility model is clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, not all. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art belong to the scope of the utility model.

[0021] The embodiment provides a kind of oil-immersed transformer sealing detection device, as shown in Figures 1-4 It includes mounting seat 100 and the gas pipe 101 of setting on mounting seat 100, and the exhaust end of gas pipe 101 is equipped with filling head 102, the one end of filling head 102 inner cavity near gas pipe 101 is equipped with check valve 103, and the outside of filling head 102 near check valve 103 is equipped with pressure gauge 104 and exhaust valve 105 respectively, and filling head 102 is also equipped with sealing mechanism for sealing the gap between oil-immersed transformer oil filling port and filling head 102.

[0022] The gas outlet of the filling head 102 is inserted into the oil filling port of the oil-immersed transformer, and then the sealing mechanism seals the oil filling port of the oil-immersed transformer and the filling head 102, then the external gas supplier supplies gas into the gas filling pipe 101, the gas is injected into the oil-immersed transformer through the one-way valve 103 and the filling head 102, and then the pressure gauge 104 is observed, the external gas supplier stops supplying gas when the pressure in the oil-immersed transformer reaches the set value, then a period of time is waited, and the reading of the pressure gauge 104 is observed, if the reading of the pressure gauge 104 remains stable within a period of time, it indicates that the oil-immersed transformer is well sealed, if the reading of the pressure gauge 104 decreases, it indicates that there is a leakage point, after the detection is completed, the excess gas is discharged by opening the exhaust valve 105, and then the above steps are operated in reverse, which can adapt to different specifications of the oil filling port of the oil-immersed transformer, greatly improves the application range of the equipment, reduces the operation difficulty, and improves the work efficiency.

[0023] As shown in Figures 1-3 The sealing mechanism includes a fixed ring 200 arranged on the outer arc surface of the filling head 102 close to the gas outlet thereof, a locking cover 201 movably sleeved on one end of the filling head 102 close to the gas filling pipe 101, and a sealing cover 202 threadedly connected to the outer arc surface of the filling head 102 close to the gas outlet thereof.

[0024] The locking cover 201 and the sealing cover 202 with appropriate diameters are selected, then the selected locking cover 201 is movably sleeved on one end of the filling head 102 close to the gas filling pipe 101, and then the sealing cover 202 is threadedly connected to the filling head 102, then the gas outlet of the filling head 102 is inserted into the oil filling port of the oil-immersed transformer, at this time the oil filling port of the oil-immersed transformer enters the annular groove 203 and is between the two sealing pads 205, and the oil filling port abuts against the annular pad 204, then the locking cover 201 is threadedly connected to the oil filling port of the oil-immersed transformer and is tightened, at this time the locking cover 201 presses the sealing cover 202, so that the sealing pads 205 and the annular pad 204 are deformed, thereby sealing the oil filling port of the oil-immersed transformer and the filling head 102, effectively preventing gas leakage and improving the detection accuracy.

[0025] As shown in Figures 1-3 The sealing mechanism further includes sealing pads 205 arranged on the inner and outer diameter arc surfaces of the annular groove 203, which further seals the gap between the oil filling port and the filling head 102.

[0026] As shown in Figures 2-4As shown, the sealing assembly is used to seal the gap between the fixing ring 200 and the sealing cover 202, and the sealing assembly comprises a gasket 1 300 arranged on the side of the fixing ring 200 close to the sealing cover 202, and the sealing cover 202 is provided with a gasket 2 301 on the side close to the fixing ring 200, and the gasket 2 301 is arranged in cooperation with the gasket 1 300.

[0027] After the sealing cover 202 is screwed into place, the sealing cover 202 is in contact with the fixing ring 200, so that the gasket 2 301 and the gasket 1 300 are tightly attached to each other for sealing.

[0028] As shown, Figure 1 the lower part of the mounting seat 100 is provided with a placing rack 400, and the filling head 102 and its accessories are clamped in the placing rack 400 after use, so as to facilitate the relevant staff to place the filling head 102.

[0029] As shown, Figures 1-4 the inner diameter of the locking cover 201 is greater than the diameter of the fixing ring 200, so as to ensure the smooth movement of the locking cover 201, and the inner diameter of the sealing cover 202 is smaller than the diameter of the fixing ring 200, and the fixing ring 200 limits the sealing cover 202, so as to ensure that the sealing cover 202 is screwed into place.

[0030] As shown, Figures 2-4 the axial section of the contact part of the gasket 2 301 and the gasket 1 300 is sawtooth-shaped, which greatly improves the contact area of the gasket 2 301 and the gasket 1 300, and further improves the sealing effect of the fixing ring 200 and the sealing cover 202.

[0031] The working principle of the sealing detection device of the oil-immersed transformer is as follows: firstly, according to the oil filling port specification of the oil-immersed transformer, the locking cover 201 and the sealing cover 202 with appropriate diameters are selected, then the selected locking cover 201 is movably sleeved on the filling head 102 close to one end of the gas filling pipe 101, then the sealing cover 202 is threadedly connected with the filling head 102, then the gas outlet of the filling head 102 is inserted into the oil filling port of the oil-immersed transformer, at this time, the oil filling port of the oil-immersed transformer enters the annular groove 203 and is between the two sealing gaskets 205, at the same time, the oil filling port is in contact with the annular gasket 204, then the locking cover 201 is threadedly connected with the oil filling port of the oil-immersed transformer and is screwed, at this time, the locking cover 201 presses the sealing cover 202, so that the sealing gasket 205 and the annular gasket 204 are deformed, the oil filling port of the oil-immersed transformer and the filling head 102 are sealed, gas leakage is effectively prevented, the accuracy of detection is improved, the oil filling port of the oil-immersed transformer of different specifications can be adapted, the application range of the equipment is greatly improved, the operation difficulty is reduced, the working efficiency is improved, then the external gas supply machine supplies gas into the gas filling pipe 101, the gas is injected into the oil-immersed transformer through the one-way valve 103 and the filling head 102, then the pressure gauge 104 is observed, after the pressure in the oil-immersed transformer reaches the set value, the external gas supply machine stops supplying gas, then a period of time is waited, and whether the reading of the pressure gauge 104 decreases is observed, if the reading of the pressure gauge 104 remains stable within a period of time, it indicates that the oil-immersed transformer is sealed well, if the reading of the pressure gauge 104 decreases, it indicates that there is a leakage point, after detection is completed, the exhaust valve 105 is opened, and then the above steps are reversely operated.

[0032] In addition, it should be further pointed out that, in the description of the utility model, unless there is an explicit provision and limitation, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. An oil-immersed transformer seal detection device, characterized by: The utility model provides a kind of oil-immersed transformer filling head sealing mechanism, including mounting seat (100) and be provided on mounting seat (100) gas filling pipe (101), the exhaust end of gas filling pipe (101) is equipped with filling head (102), the inner cavity of filling head (102) is equipped with one-way valve (103) close to one end of gas filling pipe (101), the outside of filling head (102) is equipped with pressure gauge (104) and exhaust valve (105) respectively close to one-way valve (103), filling head (102) is also equipped with sealing mechanism for sealing the gap between oil-immersed transformer oil filling port and filling head (102).

2. The sealed detection device of an oil-immersed transformer according to claim 1, characterized in that: The sealing mechanism includes a fixed ring (200) disposed on the outer arc surface of the filling head (102) near its gas outlet, a locking cover (201) movably sleeved on the outside of the filling head (102) near one end of the gas filling pipe (101), a sealing cover (202) threadedly connected to the outer arc surface of the filling head (102) near its gas outlet, an annular groove (203) provided on one side of the sealing cover (202) near the gas outlet of the filling head (102), and an annular gasket (204) provided in the annular groove (203).

3. The sealed detection device of an oil-immersed transformer according to claim 2, characterized in that: The sealing mechanism further includes sealing gaskets (205) disposed on the inner and outer diameter arc surfaces of the annular groove (203).

4. The sealed detection device for oil-immersed transformer according to claim 2, characterized in that: The sealing mechanism further includes a sealing assembly for sealing the gap between the fixed ring (200) and the sealing cover (202), the sealing assembly including a gasket one (300) disposed on one side of the fixed ring (200) near the sealing cover (202), a gasket two (301) provided on one side of the sealing cover (202) near the fixed ring (200), and the gasket two (301) and the gasket one (300) being cooperatively arranged.

5. The sealed detection device for oil-immersed transformer according to claim 1, characterized in that: The lower part of the mounting seat (100) is provided with a placing rack (400).

6. An oil-immersed transformer seal detection device as claimed in claim 2, characterized in that: The inner diameter of the locking cover (201) is larger than the diameter of the fixed ring (200), and the inner diameter of the sealing cover (202) is smaller than the diameter of the fixed ring (200).

7. An oil-immersed transformer seal detection device as claimed in claim 4, characterized in that: The contact part of the gasket two (301) and the gasket one (300) has a sawtooth-shaped axial cross section.

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