CN214119058U

CN214119058U - Internal spring type pressure release valve

Info

Publication number: CN214119058U
Application number: CN202023236327.9U
Authority: CN
Inventors: 冯蕊; 张平; 李倩; 孙伟; 马宪刚
Original assignee: Shenyang My Electric Technology Co ltd
Current assignee: Shenyang My Electric Technology Co ltd
Priority date: 2020-08-07
Filing date: 2020-12-29
Publication date: 2021-09-03
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to a transformer technical field is an inner spring formula pressure relief valve for locomotive transformer and oil-immersed transformer. The pressure release valve is used for directional oil injection type pressure release valve and a dispersed injection type pressure release valve. The outer side of the spring is provided with the protective cylinder, so that the influence on the pressure value caused by the damage of the spring due to external impact and impact on the spring is avoided, and the opening and closing performance of the pressure release valve is further influenced; when the pressure in the transformer oil tank slowly rises and before the pressure release valve is opened for pressure relief, a pressure rising signal is output to remind an operator to adopt a corresponding processing method, so that unnecessary economic loss caused by oil leakage due to pressure relief is avoided to the maximum extent; the upper rubber ring adopts a pressing ring pressing mode to improve the sealing performance.

Description

Internal spring type pressure release valve

Technical Field

The utility model relates to a transformer technical field, exactly, it is an inner spring formula pressure relief valve for locomotive transformer and oil-immersed transformer.

Background

The internal spring type pressure relief valve is one of essential fittings in a transformer, is mounted in a way that a valve seat is connected with a reserved flange of a transformer oil tank, and the part (including a spring) below the valve seat is arranged in the transformer oil tank, so that the internal spring type pressure relief valve is called as the internal spring type pressure relief valve. When the pressure in the oil tank rises due to a fault in the transformer, the pressure release valve acts to open and discharge oil gas, so that the pressure in the oil tank is reduced to a normal value, and the oil tank is protected from deformation or burst. The pressure release valve can still be reliably closed after action, so that external air cannot enter the oil tank, the interior of the oil tank is guaranteed not to be polluted, and safe operation and driving protection of the transformer are realized.

The internal spring type pressure release valve in the prior art has the defects that after the pressure release valve acts, the pressure release valve is not closed tightly, the sealing performance is unstable, leakage or oil leakage can be caused, or external air enters an oil tank to pollute the oil tank, and transformer explosion or other potential safety hazards can be caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a to the technological improvement of current internal spring formula pressure relief valve, its purpose is exactly to provide one kind and improves sealing performance, the optional internal spring formula pressure relief valve of oil spout mode.

The purpose of the utility model is realized in such a way,

the innerspring pressure relief valve includes: the internal spring type pressure relief valve is installed on a reserved installation flange on the top surface of a transformer oil tank, all parts below a valve seat are arranged in the transformer oil tank, a split pin 1, a hexagonal slotted nut 2, a flat washer 3, the valve seat 4, a die disc rod 5, a die disc cover 6, a valve bonnet 7, a shaft retainer ring 8, a contact column 9, a turnbuckle nut 10, a locking plate 11, an internal tooth locking washer 12, a cross-groove half-round head screw 13, a turnbuckle 14, a hexagonal-head bolt 15, a spring washer 16, an upper rubber ring 17, a pressing ring 18, a side rubber ring 19, an internal hexagonal cylindrical-head screw 20, a hexagonal thin nut 21, a middle ring 22, a spring 23, a spring support 24, a waterproof cable joint 25 and a travel switch 26. The pressure release valve oil injection is a directional oil injection type pressure release valve and a dispersed injection type pressure release valve.

The directional oil injection type pressure release valve is characterized in that a die disc rod penetrates through a center hole of a valve seat and is installed below a die disc cover, an upper rubber ring is arranged at the lower end of the die disc cover, a pressing ring is fixed on the valve seat through an inner hexagonal socket head screw, one half of the pressing ring is pressed below the pressing ring and is fixed in a compression mode, the side rubber ring freely rotates, an upper rubber ring is arranged between the side rubber ring and the pressing ring, the upper rubber ring, the pressing ring and the side rubber ring are used for sealing the die disc cover together, a spring is arranged at the lower section of the die disc rod, a spring support is arranged below the spring, the spring is fixed through a spring support, a slotted nut and a split pin, a contact column on the die disc cover is positioned on a valve cover through a threaded sleeve and a threaded sleeve nut, the contact column slides on the threaded sleeve, a check ring is used for limiting a shaft, the contact column is prevented from sliding out, the valve cover is fixed on the valve seat through a hexagon head bolt, an external stroke switch of the valve cover is installed on one side of the upper surface of the valve cover through a screw, the locking plate is fixed on the valve cover through a screw, and the external travel switch is fixed on the other side of the upper surface of the valve cover through the screw. The side rubber ring is fixed in a compression joint mode, is an elastic rubber ring, has a gap with the grinding disc, can rotate circularly when moving, is fixed on the valve seat by utilizing the pressing ring and the hexagon socket head cap screw to seal the cover of the grinding disc,

the size of the side rubber ring is larger than that of the valve seat and is matched with the die disc cover. The sealing performance is increased.

The upper rubber ring is designed into a sealing rubber ring with a trapezoidal section.

And a protective barrel is arranged outside the spring.

The locking plate is fixed on the valve cover through screws and used for the whole sealing test of the transformer and the transportation and hoisting of the pressure release valve, and the external travel switch is fixed on the other side of the upper surface of the valve cover through screws and is convenient to replace and maintain.

Be equipped with the rubber ring between side rubber ring and clamping ring, when the mould dish rose, the rubber ring inner circle relies on its self elasticity can follow the mould dish and raise together to owing to be the fixed mode of crimping, but the side rubber ring free rotation to this balances inside atress inequality, reseals during the whereabouts, improves the stability that improves opening pressure.

The loose-spraying type pressure release valve is characterized in that a protective cylinder is not arranged on the outer side of a spring, a die plate rod penetrates through a center hole of a valve seat, a bottom rubber ring is arranged at the lower end of the valve seat, a top rubber ring is arranged below a die plate cover, a side rubber ring is fixed on the valve seat through a pressing ring and an inner hexagonal socket head screw to seal the die plate cover, a spring is arranged at the lower section of the die plate rod and is fixed through a spring support, a slotted nut and a split pin, a contact post on the die plate cover is positioned on a valve bonnet through a threaded sleeve and a threaded sleeve nut, the contact post slides up and down in the threaded sleeve, a check ring is limited to avoid sliding of the contact post, the valve bonnet is fixed on the valve seat through a hexagon head bolt, an external stroke switch of the valve bonnet is mounted on the upper surface of the valve bonnet through a screw, and the valve bonnet adopts a loose-spraying mode to guide oil.

The utility model has the advantages that: the outer side of the spring is provided with the protective cylinder, so that the influence on the pressure value caused by the damage of the spring due to external impact and impact on the spring is avoided, and the opening and closing performance of the pressure release valve is further influenced; when the pressure in the transformer oil tank slowly rises and before the pressure release valve is opened for pressure relief, a pressure rising signal is output to remind an operator to adopt a corresponding processing method, so that unnecessary economic loss caused by oil leakage due to pressure relief is avoided to the maximum extent; the upper rubber ring adopts a pressing ring pressing mode to improve the sealing performance.

Drawings

Fig. 1 is a front view of the directional oil injection type of the present invention.

Fig. 2 is a top view of the directional oil injection type of the present invention.

Fig. 3 is a front view of the spray-type injector of the present invention.

Fig. 4 is a plan view of the present invention.

Detailed Description

Example 1: an internal spring type directional oil injection pressure relief valve is installed on a reserved installation flange on the top surface of a transformer oil tank, all components below a valve seat 4 are arranged in the transformer oil tank, a die disc rod 5 penetrates through a central hole of the valve seat 4 and is installed below a die disc cover 6, an upper rubber ring 17 is arranged at the lower end of the die disc cover 6, a side rubber ring 19 is fixed on the valve seat 4 through a pressing ring 18 and an inner hexagonal socket head screw 20 to seal the die disc cover 6, a spring 23 is installed at the lower section of the die disc rod 5 and is fixed 1 through a spring support 24, a slotted nut 2 and a split pin, a contact column 9 on the die disc cover 6 is positioned on a valve cover 7 through a threaded sleeve 14 and a threaded sleeve nut 10, the contact column 9 can slide up and down in the threaded sleeve 14, a shaft check ring 8 is used for limiting to prevent the contact column 9 from sliding out, the valve cover 7 is fixed on the valve seat 4 through a hexagon head screw 15, an external travel switch 26 of the valve cover 7 is installed on one side of the upper surface of the valve cover 7 through screws, and a locking plate 11 is fixed on the valve cover through screws, the external travel switch 26 is fixed to the other side of the upper surface of the valve housing 7 by screws.

Be equipped with rubber ring 17 between side rubber ring 19 and clamping ring 18, when mould lid 6 rose, rubber ring 17 relied on its elasticity can be followed mould lid 6 and raised together to owing to be the fixed mode of crimping, but side rubber ring 19 free rotation to this balances inside atress inequality, reseals during the whereabouts, improves opening pressure's stability.

The outer side of the spring 23 is provided with a protective cylinder which is a part of the valve seat 4 and is integrally formed, so that the spring 23 is protected from being impacted by the outside and damage is avoided.

The valve cover 7 adopts a directional oil guiding mode.

Example 2: the internal spring type dispersion spraying type pressure release valve is installed on a reserved installation flange on the top surface of a transformer oil tank, a protection cylinder is not arranged on the outer side of a spring 23, a mold rod 5 penetrates through a central hole of a valve seat 4, an upper rubber ring 17 is arranged below the mold cover, a side rubber ring 19 is fixed on the valve seat 4 through a pressing ring 18 and an inner hexagonal cylinder head screw 20 to seal a mold cover 6, the spring 23 is installed on the lower section of the mold rod 5 and is fixed through a spring support 24, a slotted nut 2 and a split pin 1, a contact column on the mold cover 6 is positioned on a valve cover 7 through a threaded sleeve 14 and a threaded sleeve nut 10, the contact column 9 slides up and down in the threaded sleeve 14, a check ring is limited to avoid sliding out of the contact column, the valve cover 7 is fixed on the valve seat through a hexagon head bolt, an external stroke switch of the valve cover 7 is installed on the upper surface of the valve cover through a screw, and the valve cover 7 conducts oil in a dispersion spraying mode.

Claims

1. Internal spring formula pressure relief valve, including split pin (1), slotted nut (2), plain washer (3), disk seat (4), disk pole (5), disk lid (6), valve bonnet (7), retaining ring (8) for the axle, touch post (9), swivel nut (10), locking plate (11), internal tooth lock washer (12), cross recess half round head screw (13), swivel nut (14), hexagon head bolt (15), spring washer (16), go up rubber ring (17), clamping ring (18), side rubber ring (19), interior hexagonal cylinder head screw (20), thin nut of hexagonal (21), well circle (22), spring (23), spring support (24), cable water joint (25), travel switch (26), its characterized in that: the internal spring type pressure release valve is installed on a reserved installation flange on the top surface of the transformer oil tank, and oil injection of the internal spring type pressure release valve is a directional oil injection type pressure release valve or a dispersed injection type pressure release valve.

2. The innerspring pressure relief valve of claim 1, wherein: the directional oil injection type pressure release valve is characterized in that a die disc rod (5) penetrates through a center hole of a valve seat (4) and is installed below a die disc cover (6), an upper rubber ring (17) is arranged at the lower end of the die disc cover (6), a pressing ring (18) is fixed on the valve seat (4) through an inner hexagonal cylinder head screw (20), a side rubber ring (19), a space between the valve seat (4) and the pressing ring (18), a half of the side rubber ring is pressed below the pressing ring (18) and is fixed in a compression joint mode, the side rubber ring (19) freely rotates, the upper rubber ring is arranged between the side rubber ring and the pressing ring, the upper rubber ring (17), the pressing ring and the side rubber ring (19) are used for sealing the die disc cover (6), a spring (23) is installed on the lower section of the die disc rod (5), a spring support (24) is installed below the spring (23), the spring (23) is fixed through the spring support (24), a slotted nut (2) and an opening pin (1), a contact column (9) on the die disc cover (6) is positioned on an upper valve cover (7) through a threaded sleeve (14) and a threaded nut (10), the contact column (9) slides on the threaded sleeve (14), the shaft is limited by the retainer ring (8), the contact column (9) is prevented from sliding out, the valve cover (7) is fixed on the valve seat (4) by the hexagon bolt (15), the external travel switch (26) of the valve cover (7) is installed on one side of the upper surface of the valve cover (7) by screws, the locking plate (11) is fixed on the valve cover (7) by the screws (13), and the external travel switch (26) is fixed on the other side of the upper surface of the valve cover (7) by the screws.

3. The innerspring pressure relief valve of claim 2, wherein: the size of the side rubber ring (19) is larger than that of the valve seat (4) and matched with the die disc cover (6).

4. The innerspring pressure relief valve of claim 2, wherein: the upper rubber ring (17) is designed into a sealing rubber ring with a trapezoidal section.

5. The innerspring pressure relief valve of claim 2, wherein: a protective barrel is arranged outside the spring.

6. The innerspring pressure relief valve of claim 1, wherein: in the dispersed spraying type pressure release valve, a protective cylinder is not arranged outside a spring (23), a die disc rod (5) penetrates through a central hole of a valve seat (4), an upper rubber ring (17) is arranged below a die disc cover, a side rubber ring (19) is fixed on the valve seat (4) by a pressing ring (18) and an inner hexagonal socket head cap screw (20) to seal the die disc cover (6), the spring (23) is arranged at the lower section of the die disc rod (5), the valve seat is fixed by a spring support (24), a slotted nut (2) and a split pin (1), a contact column on a die plate cover (6) is positioned on the valve seat cover (7) by a threaded sleeve (14) and a threaded sleeve nut (10), the contact column (9) slides up and down in the threaded sleeve (14), a check ring is limited to avoid the contact column from sliding out, the valve seat cover (7) is fixed on the valve seat by a hexagon bolt, an external travel switch of the valve seat cover (7) is installed on the upper surface of the valve seat cover by a screw, and the valve seat cover (7) guides oil by a scattered spraying mode.