Pressure release device for top surface deflation

Abstract

The utility model relates to the technical field of electrical equipment, in particular to a top surface deflation pressure release device, which comprises a main shell, a deflation mechanism and a pressure control mechanism, after an operator arrives at a use area, rapid deflation operation can be carried out by utilizing a pressing cap of the deflation mechanism, if deflation is needed, the pressing cap is rotated to be unlocked and then is slightly pulled outwards, excessive pressure in the transformer is released through a gap reserved in the main shell, and meanwhile, the pressure in the transformer is released through the gap reserved in the main shell. And if the pressure in the oil tank rapidly rises to reach the opening value of the pressure release device due to the fact that the interior of the transformer breaks down, the pressure release device can rapidly act and pop out a warning aluminum sleeve indication mark until a worker overhauls, replaces or resets the transformer, good practicability and economical efficiency are achieved, and application and popularization of equipment are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a pressure release device for top surface deflation. Background Art

[0002] The pressure relief device, referred to as GCRD, is mainly used for pressure release, fault monitoring and indication when the oil tank of distribution transformers, capacitors, reactors and other equipment is overpressured. In actual use, the change of pressure in the oil tank is used to judge the internal use environment with high accuracy.

[0003] Commonly used similar products have simple structures, cannot meet the warning requirements of high-altitude environments, cannot perform simple pressure relief during maintenance, and have great limitations. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model aims to provide a pressure release device for top surface deflation that can perform rapid pressure relief, and can provide early warning and rapid recovery after an overpressure warning;

[0005] The technical solution adopted by the utility model is: a pressure release device for top surface deflation, comprising

[0006] A main shell, wherein a main cavity is provided in the middle of the main shell, the main cavity is in a convex platform structure, a plurality of ventilation windows are provided in the middle of the main cavity, the ventilation windows penetrate the main shell, a plurality of through fixing holes are provided on a side of the main shell away from the convex platform, an inner fixed shell is provided in the middle of the main shell and passes through the main cavity, and a through ventilation cavity is provided at the center of the inner fixed shell;

[0007] The deflation mechanism comprises a sliding buckle block, the sliding buckle block is a funnel-shaped structure, the sliding buckle block is placed in the main cavity, the narrow end of the sliding buckle block is sleeved with an aluminum sleeve, the aluminum sleeve is fixedly connected to the sliding buckle block, the outer wall of the aluminum sleeve is connected to the main shell boss through and slidingly, the bottom of the sliding buckle block is provided with a bottom deflation cavity, the bottom deflation cavity is buckled into and slidably connected to one end of the inner fixed shell close to the main cavity;

[0008] A locking mechanism, the locking mechanism comprising a locking piece, for assisting the fixing of the aluminum sleeve;

[0009] A pressure control mechanism, the pressure control mechanism includes a base support rod, the base support rod is passed through and fixedly connected to the center of the sliding buckle block, the base support rod passes through the ventilation cavity and does not contact the inner fixed shell, and a recovery member is provided at one end of the base support rod away from the sliding buckle block, and the recovery member is arranged in the ventilation cavity.

[0010] In one embodiment, an aluminum sleeve sealing ring is sleeved on the outer periphery of the aluminum sleeve, and a sealing ring groove is provided on the main shell body at the fitting side of the aluminum sleeve, and the aluminum sleeve sealing ring is placed in the sealing ring groove.

[0011] In one embodiment, the locking member includes a plurality of side clamping nuts, the side periphery of the main shell body is provided with a plurality of through sliding grooves, the side clamping nuts are screwed into the sliding grooves, a side push rod is provided between the side clamping nuts and the aluminum sleeve, one side of the side push rod is in contact with the outer periphery of the aluminum sleeve, and a thrust spring is provided between the side push rod and the side clamping nut.

[0012] In one embodiment, the air release mechanism also includes a clamping cap, which has a conical structure. The narrow end of the sliding buckle block is provided with a top air release chamber, and the top air release chamber has an inverted cone barrel structure. The end of the top air release chamber away from the inner fixed shell is provided with a clamping screw, and the clamping screw is fixedly connected to the sliding buckle block. The long rod end of the clamping cap is passed through and slidably connected to the center of the clamping screw. The end of the long rod of the clamping cap is provided with an air release sealing ring, and the air release sealing ring fits the conical side of the top air release chamber. A tension spring is provided between the end of the long rod of the clamping cap and the clamping screw and is penetrated by the long rod of the clamping cap.

[0013] In one embodiment, a sealing ring is further provided between the sliding buckle block and the inner fixed shell, and a sealing ring fixing groove is provided on one side of the inner fixed shell. The sealing ring is placed in the sealing ring fixing groove to prevent oily substances from adhering to the sliding buckle block and the inner fixed shell.

[0014] In one embodiment, a through cavity is provided on the base support rod, one end of the through cavity leads to the top air relief cavity, one end of the through cavity is provided with a plurality of air permeable cavities, and the air permeable cavities pass through the through cavity and the air vent cavity.

[0015] In one embodiment, the recovery member includes a spring pressure ring base, which is fixedly connected to one end of the base support rod away from the aluminum sleeve. A return spring connecting the spring pressure ring base and the inner fixed shell is provided in the ventilation cavity, and the return spring is penetrated by the base support rod.

[0016] In one embodiment, a fixing nut is further provided on the inner fixed shell, and the fixing nut is used to fix the inner fixed shell to the mounting device.

[0017] The beneficial effects of the utility model are as follows: the utility model is a pressure release device that can quickly release pressure, and can give an early warning and quickly recover from top surface deflation after an overpressure warning. The specific implementation method is as follows:

[0018] After the operator installs the whole equipment on the platform used by fixing the nut, during the maintenance process, the operator pulls the clamping cap outward to squeeze the tension spring and separate the air-release seal ring from the top air-release chamber. The gas inside the platform flows into the air-permeable chamber of the base support rod through the ventilation cavity, and then flows to the through cavity and the top air-release chamber in turn, and flows out through the gap between the clamping cap and the clamping screw, and performs a simple pressure relief operation. After completion, the clamping cap is acted upon by the tension spring to connect it to the clamping screw.

[0019] Usually, the internal pressure fluctuation of the equipment has different time effects. In order to prevent the equipment from being damaged by overpressure, the equipment has the function of automatic overpressure warning and pressure relief: after the overpressure gas flows into the ventilation cavity, the compression cap is fixed to the compression screw and the exhaust cannot be exhausted through this route. Then, after the high-pressure gas flows from the ventilation cavity into the bottom air release cavity, the gap between the sliding buckle block and the inner fixed shell is increased, and the sliding buckle block is moved upward as a whole. At the same time, the sliding buckle block drives the aluminum sleeve to separate from the main shell in contact. When it is lifted to a certain height, the side push rod on the locking mechanism is pushed by the thrust spring to fit the side push rod to the outer periphery of the narrow rod of the sliding buckle block. The aluminum sleeve is also supported by the side push rod and cannot continue to fall. At the same time, the sliding buckle block is completely separated from the buckled inner fixed shell. The overpressure gas flows into the main cavity through the gap and then continues to flow into the air vent until it is discharged. The outer periphery of the aluminum sleeve is painted with a warning color, which can assist the patrol personnel under the platform for rapid positioning and maintenance.

[0020] Since the platform used usually contains grease-like liquids, during the exhaust and pressure reduction process, tiny oil droplets often flow into the gap between the inner fixed shell and the sliding buckle block, forming adhesion, which affects the accuracy of pressure judgment for the next use. A sealing ring is provided to leave a gap between the two to avoid contact and adhesion between them.

[0021] The device has a simple structure and can achieve normal use in different scenarios by changing the gas ventilation airway. It can provide early warning exhaust and rapid recovery after overpressure warning. It has good practicality and economy, and is beneficial to the promotion and use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;

[0025] Figure 3 It is a partial three-dimensional structural schematic diagram of the deflation mechanism of the utility model;

[0026] Figure 4It is a partial three-dimensional structural schematic diagram of the locking mechanism of the utility model;

[0027] Figure 5 This is the second partial three-dimensional structural schematic diagram of the locking mechanism of the utility model;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the pressure control mechanism of the utility model;

[0029] Figure 7 It is a front section structural schematic diagram of the utility model.

[0030] Description of the drawings: 1. Main shell; 102. Sliding groove; 103. Sealing ring groove; 104. Main cavity; 12. Ventilation window; 13. Fixing hole; 14. Inner fixed shell; 141. Sealing ring fixing groove; 142. Sealing ring; 143. Ventilation cavity; 15. Fixing nut; 2. Degassing mechanism; 21. Clamping cap; 23. Clamping screw; 24. Aluminum sleeve; 241. Aluminum sleeve sealing ring; 25. Tension spring; 26. Degassing sealing ring; 27. Sliding buckle block; 271. Bottom degassing cavity; 272. Top degassing cavity; 3. Locking mechanism; 31. Side clamping nut; 311. Side push rod; 312. Thrust spring; 4. Pressure control mechanism; 41. Spring pressure ring base; 42. Reset spring; 43. Base support rod; 44. Through cavity; 441. Ventilation cavity. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0033] Combine the following Figure 1-7 The specific implementation mode of the utility model is described, a pressure release device for top surface deflation comprises

[0034] Reference Figure 1 , 2As shown, a main shell 1 is provided in the middle of the main shell 1 with a main cavity 104, the main cavity 104 is in a convex platform structure, a plurality of air windows 12 are provided in the middle of the main cavity 104, the air windows 12 penetrate the main shell 1, a plurality of through fixing holes 13 are provided on a side of the main shell 1 away from the convex platform, an inner fixed shell 14 is provided in the middle of the main shell 1 and passes through the main cavity 104, the fixing holes 13 assist in fixing the inner fixed shell 14 in the main cavity 104, and a through ventilation cavity 143 is provided at the center of the inner fixed shell 14;

[0035] It can be seen that the main gas flow channel of the pressure release device is to flow in from the ventilation cavity 143 and then continue to flow out through the top of the main cavity 104 and a plurality of ventilation windows 12 in the middle.

[0036] Reference Figure 2 As shown, the deflation mechanism 2 includes a sliding buckle block 27, the sliding buckle block 27 is a funnel-shaped structure, the sliding buckle block 27 is placed in the main cavity 104, the sliding buckle block 27 is arranged between the main shell 1 and the inner fixed shell 14, the narrow end of the sliding buckle block 27 is sleeved with an aluminum sleeve 24, the aluminum sleeve 24 is fixedly connected to the sliding buckle block 27, the aluminum sleeve 24 is a warning color sleeve structure, the outer wall of the aluminum sleeve 24 is connected to the main shell 1 at the boss, and the outer periphery of the aluminum sleeve 24 is sleeved with an aluminum sleeve sealing ring 241, the main shell 1 is provided with a sealing ring groove 103 on the fitting side of the aluminum sleeve 24, the aluminum sleeve sealing ring 241 is placed in the sealing ring groove 103, and a bottom deflation chamber 271 is provided at the bottom of the sliding buckle block 27. The bottom deflation chamber 271 is buckled into and slidably connected to one end of the inner fixed shell 14 close to the main cavity 104;

[0037] Beneficially, the air release mechanism 2 also includes a clamping cap 21, which has a needle-cone structure. The narrow end of the sliding buckle block 27 is provided with a top air release chamber 272, and the top air release chamber 272 has an inverted cone barrel structure. The end of the top air release chamber 272 away from the inner fixed shell 14 is provided with a clamping screw 23, and the clamping screw 23 is fixedly connected to the sliding buckle block 27. The long rod end of the clamping cap 21 is passed through and slidably connected to the center of the clamping screw 23. The end of the long rod of the clamping cap 21 is provided with an air release sealing ring 26, which fits the cone side of the top air release chamber 272. A tension spring 25 is provided between the end of the long rod of the clamping cap 21 and the clamping screw 23 and is penetrated by the long rod of the clamping cap 21.

[0038] Reference Figure 3 , 4As shown in Figure 5, the locking mechanism 3 includes a locking piece to assist in fixing the aluminum sleeve 24; the locking piece includes two sets of side clamping nuts 31, and the side surrounding of the main shell 1 near the middle of the aluminum sleeve 24 is provided with two sets of through sliding grooves 102, the side clamping nuts 31 are screwed into the sliding grooves 102, and a side push rod 311 is provided between the side clamping nut 31 and the aluminum sleeve 24, one side of the side push rod 311 is in contact with the outer periphery of the aluminum sleeve 24, and a thrust spring 312 is provided between the side push rod 311 and the side clamping nut 31.

[0039] Reference Figure 6 , 7 As shown, the pressure control mechanism 4 includes a base support rod 43, the base support rod 43 passes through and is fixedly connected to the center of the sliding buckle block 27, the base support rod 43 passes through the ventilation cavity 143 and does not contact the inner fixed shell 14, a through cavity 44 is provided on the base support rod 43, one end of the through cavity 44 passes through the top air relief cavity 272 provided on the sliding buckle block 27, and the through cavity 44 is provided with a plurality of air permeable cavities 441 at one end away from the top air relief cavity 272, and the air permeable cavity 441 passes through the through cavity 44 and the ventilation cavity 143, and a restoring member is provided at one end of the base support rod 43 away from the sliding buckle block 27, and the restoring member is arranged in the ventilation cavity 143, and the restoring member includes a spring pressure ring base 41, and the spring pressure ring base 41 is fixedly connected to one end of the base support rod 43 away from the aluminum sleeve 24, and a return spring 42 connecting the spring pressure ring base 41 and the inner fixed shell 14 is provided in the ventilation cavity 143, and the return spring 42 is penetrated by the base support rod 43.

[0040] Advantageously, a sealing ring 142 is provided between the sliding buckle block 27 and the inner fixed shell 14 , and a sealing ring fixing groove 141 is provided on one side of the inner fixed shell 14 close to the sliding buckle block 27 , and the sealing ring 142 is placed in the sealing ring fixing groove 141 to prevent oily substances from adhering to the sliding buckle block 27 and the inner fixed shell 14 .

[0041] Advantageously, a fixing nut 15 is further provided on the inner fixed housing 14, and the fixing nut 15 is used to fix the inner fixed housing 14 to the mounting device.

[0042] Working principle of this utility model:

[0043] After the operator installs the whole equipment on the platform used by fixing the nut 15, during the maintenance process, the clamping cap 21 is pulled outward to squeeze the tension spring 25, and the air leakage seal ring 26 is separated from the top air leakage chamber 272. The gas inside the platform flows into the air permeable chamber 441 of the base support rod 43 through the ventilation cavity 143, and continues to flow to the through cavity 44 and the top air leakage chamber 272 in sequence, and flows out through the gap between the clamping cap 21 and the clamping screw 23, and a simple pressure relief operation is performed. After completion, the clamping cap 21 is acted upon by the tension spring 25, so that it is connected to the clamping screw 23;

[0044] Usually, the internal pressure of the equipment fluctuates at different times. In order to prevent the equipment from being damaged by overpressure, the equipment has the function of automatic overpressure warning and pressure relief: after the overpressure gas flows into the ventilation cavity 143, since the clamping cap 21 is fixed to the clamping screw 23, it cannot be exhausted through this route. Then, after the high-pressure gas flows from the ventilation cavity 143 into the bottom air release cavity 271, the gap between the sliding buckle block 27 and the inner fixed shell 14 is increased, and the sliding buckle block 27 is moved upward as a whole. At the same time, the sliding buckle block 27 drives the aluminum sleeve 24 to separate from the main shell 1. When the sliding buckle block 27 is in contact with the main shell 1, the aluminum sleeve 24 is pulled away from the main shell 1. When it is lifted to a certain height, the side push rod 311 on the locking mechanism 3 is pushed by the push spring 312 to fit the side push rod 311 to the outer periphery of the narrow rod of the sliding buckle block 27, and the aluminum sleeve 24 is also supported by the side push rod 311 and cannot continue to fall. At the same time, the sliding buckle block 27 is completely separated from the buckled inner fixed shell 14, and the overpressure gas flows into the main cavity 104 through the gap therebetween and then continues to flow into the air vent 12 until it is discharged. The outer periphery of the aluminum sleeve 24 is painted with a warning color, which can assist the patrol personnel under the platform to quickly locate and repair;

[0045] Since the platform used usually contains grease-like liquid inside, during the process of exhaust and pressure reduction, tiny oil droplets often flow into the gap between the inner fixed shell 14 and the sliding buckle block 27, forming adhesion, which affects the accuracy of pressure judgment for the next use. By setting the sealing ring 142, a gap is left between the two to avoid contact and adhesion between them.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A pressure release device for top surface deflation, characterized in that: include A main shell (1), wherein a main cavity (104) is provided in the middle of the main shell (1), the main cavity (104) is in a convex platform structure, a plurality of air vents (12) are provided in the middle of the main cavity (104), the air vents (12) penetrate the main shell (1), a plurality of through fixing holes (13) are provided on a side of the main shell (1) away from the convex platform, an inner fixed shell (14) is provided in the middle of the main shell (1) and is connected to the main cavity (104), and a through ventilation cavity (143) is provided at the center of the inner fixed shell (14); A deflation mechanism (2), the deflation mechanism (2) comprising a sliding buckle block (27), the sliding buckle block (27) being of a funnel-shaped structure, the sliding buckle block (27) being placed in the main cavity (104), the narrow end of the sliding buckle block (27) being sleeved with an aluminum sleeve (24), the aluminum sleeve (24) being fixedly connected to the sliding buckle block (27), the outer wall of the aluminum sleeve (24) being connected slidably to the boss of the main shell (1), the bottom of the sliding buckle block (27) being provided with a bottom deflation cavity (271), the bottom deflation cavity (271) being inserted into and slidably connected to one end of the inner fixed shell (14) close to the main cavity (104); A locking mechanism (3), the locking mechanism (3) comprising a locking piece, used to assist in fixing the aluminum sleeve (24); A pressure control mechanism (4), the pressure control mechanism (4) comprising a base support rod (43), the base support rod (43) passing through and fixedly connected to the center of the sliding buckle block (27), the base support rod (43) passing through the ventilation cavity (143) and not contacting the inner fixed shell (14), and a restoring member is provided at one end of the base support rod (43) away from the sliding buckle block (27), and the restoring member is arranged in the ventilation cavity (143).

2. The pressure release device for top surface deflation according to claim 1, characterized in that: The aluminum sleeve (24) is covered with an aluminum sleeve sealing ring (241) on its outer periphery, and the main housing (1) is provided with a sealing ring groove (103) on the bonding side of the aluminum sleeve (24), and the aluminum sleeve sealing ring (241) is placed in the sealing ring groove (103).

3. The pressure release device for top surface deflation according to claim 1, characterized in that: The locking member comprises a plurality of side clamping nuts (31), the side periphery of the main shell (1) is provided with a plurality of through sliding grooves (102), the side clamping nuts (31) are screwed into the sliding grooves (102), a side push rod (311) is provided between the side clamping nuts (31) and the aluminum sleeve (24), one side of the side push rod (311) is in contact with the outer periphery of the aluminum sleeve (24), and a thrust spring (312) is provided between the side push rod (311) and the side clamping nut (31).

4. The pressure release device for top surface deflation according to claim 1, characterized in that: The air release mechanism (2) also includes a clamping cap (21), the clamping cap (21) is in a conical structure, a top air release chamber (272) is provided at the narrow end of the sliding buckle block (27), the top air release chamber (272) is in an inverted cone barrel structure, a clamping screw (23) is provided at one end of the top air release chamber (272) away from the inner fixed shell (14), the clamping screw (23) is fixedly connected to the sliding buckle block (27), the long rod end of the clamping cap (21) is passed through and slidably connected to the center of the clamping screw (23), a air release sealing ring (26) is provided at the end of the long rod of the clamping cap (21), the air release sealing ring (26) is in contact with the conical side of the top air release chamber (272), and a tension spring (25) is provided between the end of the long rod of the clamping cap (21) and the clamping screw (23) and is penetrated by the long rod of the clamping cap (21).

5. The pressure release device for top surface deflation according to claim 1, characterized in that: A sealing ring (142) is also provided between the sliding buckle block (27) and the inner fixed shell (14), and a sealing ring fixing groove (141) is provided on one side of the inner fixed shell (14). The sealing ring (142) is placed in the sealing ring fixing groove (141) to prevent oily substances from adhering to the sliding buckle block (27) and the inner fixed shell (14).

6. The pressure release device for top surface deflation according to claim 4, characterized in that: The base support rod (43) is provided with a through cavity (44), one end of which is connected to the top air relief cavity (272), and one end of the through cavity (44) is provided with a plurality of air permeable cavities (441), which pass through the through cavity (44) and the air permeable cavity (441).

7. The pressure release device for top surface deflation according to claim 1, characterized in that: The recovery member comprises a spring pressure ring base (41), wherein the spring pressure ring base (41) is fixedly connected to one end of the base support rod (43) away from the aluminum sleeve (24), and a return spring (42) connecting the spring pressure ring base (41) and the inner fixed shell (14) is arranged in the ventilation cavity (143), and the return spring (42) is penetrated by the base support rod (43).

8. The top surface venting pressure release device according to claim 1, characterized in that: The inner fixed shell (14) is also provided with a fixing nut (15), and the fixing nut (15) is used to fix the inner fixed shell (14) to the installation equipment.

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