Pre-alarm pressure relief valve

Abstract

The utility model relates to a pre-alarm pressure relief valve which comprises a pressure relief valve main body and a transformer box body, the pressure relief valve main body is installed on the top of the transformer box body, and a pressure film disc is arranged in the pressure relief valve main body. And a signal rod extending to the outer side of the top of the pressure relief valve main body is fixedly mounted at the top of the pressure diaphragm disc. According to the pre-alarm pressure relief valve, through the arrangement of the touch sensor, when air pressure in a transformer box flows to the pressure relief valve body, air can push the movable base to move and compress the auxiliary spring, and when the auxiliary spring is compressed by the movable base to the maximum, the movable base can touch the touch sensor at the bottom of the mounting base; the touch sensor transmits early warning information to the controller after receiving touch, and the controller prompts in time after receiving an early warning signal, so that the pressure relief valve main body can realize an effect of early warning before rated opening in a use process.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure release valves, in particular to a pre-alarm pressure release valve. Background Art

[0002] The pressure relief valve, also known as the ash bin release valve or ash bin vacuum release valve, is arranged on the top of the ash bin. When the ash bin intake and exhaust are over-pressured and the temperature changes abnormally, it protects the ash bin from excessive positive and negative pressure. The winding coil of the oil-immersed transformer works in the transformer cooling oil. During operation, especially when the distribution line or the transformer itself fails, the pressure in the transformer box will increase rapidly due to the increase in winding coil temperature and the gasification of transformer oil. In order to ensure that the transformer box does not deform or burst when the internal pressure increases rapidly, a pressure relief valve is installed on the transformer box.

[0003] At present, pressure relief valves are widely used in the market. Generally, when the pressure in the transformer box reaches the opening setting value of the pressure relief valve, the pressure relief valve will act quickly within 2ms to release the pressure in the transformer box. After the pressure in the transformer box is reduced, the valve disc is closed under the action of the spring. However, traditional pressure relief valves can only achieve opening pressure values ​​within the rated range and cannot be predicted in advance, resulting in the operator being unable to predict the pressure in the transformer box and take corresponding preventive measures. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pre-alarm pressure relief valve, which has the advantage of early warning and solves the problem that traditional pressure relief valves can only achieve opening pressure values ​​within the rated range and cannot make advance forecasts, resulting in the operator being unable to predict the pressure inside the transformer box and take corresponding preventive measures.

[0005] In order to achieve the above-mentioned purpose of early warning, the utility model provides the following technical solutions: a pre-alarm pressure relief valve, comprising a pressure relief valve body and a transformer box, the pressure relief valve body is installed on the top of the transformer box, a pressure diaphragm disc is arranged inside the pressure relief valve body, a signal rod extending to the outside of the top of the pressure relief valve body is fixedly installed on the top of the pressure diaphragm disc, a first spring is sleeved on the outside of the signal rod, and an early warning mechanism is arranged at the bottom of the pressure diaphragm disc;

[0006] The early warning mechanism includes a mounting seat, the bottom of the pressure membrane disk is movably mounted with a mounting seat, the mounting seat is connected to the bottom of the pressure membrane disk through four mounting bolts, the bottom of the mounting seat is fixedly mounted with a touch sensor, the bottom of the mounting seat is provided with an auxiliary spring, and the bottom of the auxiliary spring is provided with a movable seat.

[0007] Furthermore, a rainproof cap is fixedly installed on the top of the signal rod, and a controller is fixedly installed on the right side of the pressure relief valve body.

[0008] Furthermore, a micro switch is arranged on the right side of the pressure relief valve body, and a flange is fixedly installed on the bottom of the pressure relief valve body.

[0009] Furthermore, the flange is connected to the top of the transformer box through fixing bolts, and the first spring is located on the top of the pressure diaphragm disk.

[0010] Furthermore, a first threaded hole threadedly connected to a mounting bolt is formed at the bottom of the pressure diaphragm disc, and a second threaded hole threadedly connected to a fixing bolt is formed at the top of the transformer box.

[0011] Furthermore, the auxiliary spring is sleeved on the outside of the touch sensor, and the bottom of the mounting seat and the top of the movable seat are both provided with a slot adapted to the auxiliary spring.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] The pre-alarm pressure relief valve is provided with a touch sensor. When the air pressure inside the transformer box flows to the pressure relief valve body, the gas will push the moving seat to move the compressing auxiliary spring. When the moving seat compresses the auxiliary spring to the extreme, the moving seat will touch the touch sensor at the bottom of the mounting seat. When the touch sensor receives the touch, it will transmit the pre-alarm information to the controller. After receiving the pre-alarm signal, the controller will remind in time, so that the pressure relief valve body can realize the pre-alarm function before the rated opening during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0016] Figure 3 It is the explosion diagram of the early warning mechanism of the utility model.

[0017] In the figure: 1. Pressure relief valve body; 2. Transformer box; 3. Pressure diaphragm disk; 4. Signal rod; 5. First spring; 6. Early warning mechanism; 601. Mounting seat; 602. Mounting bolt; 603. Touch sensor; 604. Auxiliary spring; 605. Moving seat; 7. Rain cap; 8. Controller; 9. Micro switch; 10. Flange. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 In this embodiment, a pre-alarm pressure relief valve comprises a pressure relief valve body 1 and a transformer box 2. The pressure relief valve body 1 is mounted on the top of the transformer box 2. A pressure diaphragm disc 3 is arranged inside the pressure relief valve body 1. A signal rod 4 extending to the outside of the top of the pressure relief valve body 1 is fixedly mounted on the top of the pressure diaphragm disc 3. A first spring 5 is sleeved on the outside of the signal rod 4. An early warning mechanism 6 is arranged at the bottom of the pressure diaphragm disc 3.

[0020] The early warning mechanism 6 includes a mounting seat 601, and the mounting seat 601 is movably installed at the bottom of the pressure diaphragm disk 3. The mounting seat 601 is connected to the bottom of the pressure diaphragm disk 3 through four mounting bolts 602. A touch sensor 603 is fixedly installed at the bottom of the mounting seat 601. When the movable seat 605 compresses the auxiliary spring 604 to the extreme, the movable seat 605 will touch the touch sensor 603 at the bottom of the mounting seat 601. When the touch sensor 603 receives the touch, it will transmit the early warning information to the controller 8. After receiving the early warning signal, the controller 8 will promptly remind. An auxiliary spring 604 is arranged at the bottom of the mounting seat 601, and a movable seat 605 is arranged at the bottom of the auxiliary spring 604. When the air pressure inside the transformer box 2 flows to the pressure release valve body 1, the gas will push the movable seat 605, so that the movable seat 605 moves to compress the auxiliary spring 604.

[0021] In the case implementation, a rain cap 7 is fixedly installed on the top of the signal rod 4, and a controller 8 is fixedly installed on the right side of the pressure relief valve body 1. The controller 8 and the electronic components in this patent are electrically connected through wires, so that it is convenient to operate the controller 8 to control the operation of the electronic components.

[0022] In the case implementation, a micro switch 9 is provided on the right side of the pressure relief valve body 1, and a flange 10 is fixedly installed on the bottom of the pressure relief valve body 1. The flange 10 is connected to the top of the transformer box 2 through fixing bolts. A second threaded hole threadedly connected to the fixing bolt is opened on the top of the transformer box 2, which facilitates the installation of the pressure relief valve body 1 on the top of the transformer box 2 through the flange 10 and the fixing bolts.

[0023] When implementing, follow these steps:

[0024] 1) When the gas pressure inside the transformer box 2 flows to the pressure relief valve body 1, the gas pushes the moving seat 605, causing the moving seat 605 to move and compress the auxiliary spring 604;

[0025] 2) When the movable seat 605 compresses the auxiliary spring 604 to the extreme, the movable seat 605 will touch the touch sensor 603 at the bottom of the mounting seat 601;

[0026] 3) The touch sensor 603 receives the touch and transmits the warning information to the controller 8;

[0027] 4) Finally, the controller 8 will give a prompt reminder after receiving the warning signal, so that the pressure relief valve body 1 can achieve a pre-alarm before the rated opening during use.

[0028] To summarize, the pre-alarm pressure relief valve is provided with a touch sensor 603. When the air pressure inside the transformer box 2 flows to the pressure relief valve body 1, the gas will push the movable seat 605, causing the movable seat 605 to move and compress the auxiliary spring 604. When the movable seat 605 compresses the auxiliary spring 604 to the extreme, the movable seat 605 will touch the touch sensor 603 at the bottom of the mounting seat 601. When the touch sensor 603 receives the touch, it will transmit the early warning information to the controller 8. After receiving the early warning signal, the controller 8 will promptly remind, so that the pressure relief valve body 1 can realize the pre-alarm function before the rated opening during use, which solves the problem that the traditional pressure relief valve can only realize the opening pressure value within the rated range and cannot make advance prediction, thereby causing the operator to be unable to predict the pressure in the transformer box and take corresponding preventive measures.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-alarm pressure relief valve, comprising a pressure relief valve body (1) and a transformer box (2), characterized in that: The pressure relief valve body (1) is mounted on the top of the transformer box (2), a pressure diaphragm disc (3) is arranged inside the pressure relief valve body (1), a signal rod (4) extending to the outside of the top of the pressure relief valve body (1) is fixedly mounted on the top of the pressure diaphragm disc (3), a first spring (5) is sleeved on the outside of the signal rod (4), and an early warning mechanism (6) is arranged at the bottom of the pressure diaphragm disc (3); The early warning mechanism (6) comprises a mounting seat (601), the mounting seat (601) is movably mounted on the bottom of the pressure membrane disc (3), the mounting seat (601) is connected to the bottom of the pressure membrane disc (3) via four mounting bolts (602), a touch sensor (603) is fixedly mounted on the bottom of the mounting seat (601), an auxiliary spring (604) is arranged at the bottom of the mounting seat (601), and a movable seat (605) is arranged at the bottom of the auxiliary spring (604).

2. A pre-alarm pressure relief valve according to claim 1, characterized in that: A rainproof cap (7) is fixedly mounted on the top of the signal rod (4), and a controller (8) is fixedly mounted on the right side of the pressure relief valve body (1).

3. The pre-alarm pressure relief valve according to claim 1, characterized in that: A micro switch (9) is arranged on the right side of the pressure relief valve body (1), and a flange (10) is fixedly mounted on the bottom of the pressure relief valve body (1).

4. A pre-alarm pressure relief valve according to claim 3, characterized in that: The flange (10) is connected to the top of the transformer box (2) via fixing bolts, and the first spring (5) is located on the top of the pressure diaphragm disk (3).

5. A pre-alarm pressure relief valve according to claim 4, characterized in that: The bottom of the pressure membrane disc (3) is provided with a first threaded hole threadedly connected to the mounting bolt (602), and the top of the transformer box (2) is provided with a second threaded hole threadedly connected to the fixing bolt.

6. The pre-alarm pressure relief valve according to claim 1, characterized in that: The auxiliary spring (604) is sleeved on the outside of the touch sensor (603), and the bottom of the mounting seat (601) and the top of the movable seat (605) are both provided with a slot adapted to the auxiliary spring (604).

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