A pressure relief valve detection device

Abstract

The present invention discloses a pressure release valve detection device, comprising: a housing, a pressure release valve, a pressurized tank, a pressurized air pump, a pressure sensor and a flow rate sensor; the pressurized tank is installed in the housing, an opening is provided on the top of the housing, the outlet of the pressurized tank faces the opening, the pressurized air pump is connected to the inlet of the pressurized tank through a pipeline, the pressure release valve is installed on the pressurized tank, and the air inlet of the pressure release valve is connected to the outlet of the pressurized tank, a cover body that can be covered on the outside of the pressure release valve is provided on the top of the housing, air diffusion holes are provided on the side wall of the cover body, an installation port is provided at the position of the side wall of the pressurized tank near the air release port of the pressure release valve, the pressure sensor is installed at the installation port, the sensing end of the pressure sensor extends into the pressurized tank, and the flow rate sensor is installed on the outer surface of the top of the housing and is located in the cover body after the cover is closed. The present invention improves the comprehensiveness of the detection, thereby increasing the effective basis for evaluating the detection state of the converter transformer pressure release valve.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure relief valves, and in particular to a pressure relief valve detection device. Background Art

[0002] At present, the relevant institutions at home and abroad generally use the method of simulating the protection action of the pressure relief valve to test the transformer pressure protection device. The existing detection device cannot detect key data such as the flow rate after the pressure relief valve gas is released, resulting in incomplete detection. Summary of the invention

[0003] The embodiment of the present invention provides a pressure relief valve detection device to solve the problem that the data detected by the pressure relief valve detection device in the prior art is incomplete.

[0004] The embodiment of the present invention provides the following technical solution:

[0005] A pressure relief valve detection device, comprising: a shell, a pressure relief valve, a pressurized tank, a pressurized air pump, a pressure sensor and a flow rate sensor; the pressure relief valve comprises: a relief valve housing, and a sealing gasket and at least two sealing rings with different diameters arranged in the relief valve housing and movable up and down, an air inlet is provided at the bottom of the relief valve housing, an openable and closable air release port is provided on the side wall of the relief valve housing, the sealing gasket is located above the air inlet and can be crimped onto the air inlet, the area of ​​the sealing gasket is larger than the area of ​​the air inlet, the centers of at least two of the sealing rings coincide, and at least two of the sealing rings are arranged between the lower surface of the sealing gasket and the inner surface of the bottom of the relief valve housing; the pressure relief valve comprises: a relief valve housing, and a sealing gasket and at least two sealing rings arranged in the relief valve housing and movable up and down, an air inlet is provided at the bottom of the relief valve housing, an openable and closable air release port is provided on the side wall of the relief valve housing, the sealing gasket is located above the air inlet and can be crimped onto the air inlet, the area of ​​the sealing gasket is larger than the area of ​​the air inlet, the centers of at least two of the sealing rings coincide, and at least two of the sealing rings are arranged between the lower surface of the sealing gasket and the inner surface of the bottom of the relief valve housing; The pressure tank is installed in the shell, and an opening is provided on the top of the shell. The outlet of the pressure tank faces the opening, and the pressurized air pump is connected to the inlet of the pressure tank through a pipeline. The pressure relief valve is installed on the pressure tank, and the air inlet of the pressure relief valve is connected to the outlet of the pressure tank. A cover body that can cover the outside of the pressure relief valve is provided on the top of the shell, and air diffusion holes are provided on the side wall of the cover body. An installation port is provided on the side wall of the pressure tank near the air release port of the pressure relief valve. The pressure sensor is installed at the installation port, and the sensing end of the pressure sensor extends into the pressure tank. The flow rate sensor is installed on the outer surface of the top of the shell and is located in the cover body after the cover is closed.

[0006] Further: the flow velocity sensor has a time relay inside.

[0007] Further: the flange of the pressure relief valve is fixedly installed on the top of the shell.

[0008] Further: the lower surface of the sealing gasket is provided with at least two concentric first semicircular grooves, and the inner surface of the bottom of the release valve housing is provided with at least two concentric second semicircular grooves, the positions of each of the first semicircular grooves and each of the second semicircular grooves correspond to each other, the diameters of each of the first semicircular grooves and the corresponding second semicircular grooves are the same as the diameter of each of the sealing rings, one of the two adjacent sealing rings is installed in a first semicircular groove with the same diameter as the sealing ring, and the other sealing ring is installed in a second semicircular groove with the same diameter as the sealing ring.

[0009] Furthermore, the pressure relief valve also includes: a first spring, the upper surface of the sealing gasket is connected to one end of the first spring, the other end of the first spring is connected to the inner surface of the top of the relief valve housing, and the first spring is always in a compressed state.

[0010] Further: a first guide column extending upward is provided on the upper surface of the sealing gasket, a second guide column extending downward is provided on the inner surface of the top of the release valve housing, one end of the first spring is sleeved outside the first guide column, and the other end of the first spring is sleeved outside the second guide column.

[0011] Furthermore, the pressure relief valve also includes: a second spring and a handwheel, an opening is provided at the top of the relief valve housing, a third guide column is provided on the upper surface of the sealing gasket, the handwheel is connected to one end of the rotating shaft, the other end of the rotating shaft extends into the opening and is connected to the third guide column, the diameter of the rotating shaft matches the diameter of the opening, the upper surface of the sealing gasket is connected to one end of the second spring, the other end of the second spring is connected to the inner surface of the top of the relief valve housing, the second spring is sleeved outside the rotating shaft and the third guide column, and the second spring is always in a compressed state.

[0012] Further: the size of the installation port is the same as the size of the air release port of the pressure relief valve.

[0013] Furthermore, the pressure release valve detection device also includes: a controller, and the pressure sensor and the flow rate sensor are both electrically connected to the controller.

[0014] Further: a pull-out drawer is provided at the bottom of the shell, and the controller is arranged in the drawer.

[0015] The pressure relief valve detection device of the embodiment of the present invention collects various data of the converter transformer pressure relief valve during the detection process, thereby improving the comprehensiveness of the detection, thereby increasing the effective basis for evaluating the detection status of the converter transformer pressure relief valve, reducing the test items for manual testing, and improving the efficiency of the detection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0017] Figure 1 is a schematic structural diagram of a pressure relief valve detection device according to an embodiment of the present invention;

[0018] Figure 2 is a cross-sectional view of a pressure relief valve according to a preferred embodiment of the present invention;

[0019] Figure 3 is a cross-sectional view of a pressure relief valve according to another preferred embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The embodiment of the present invention discloses a pressure relief valve detection device. Figures 1 to 3 As shown, the pressure release valve detection device includes: a housing 1, a pressure release valve 2, a pressurized tank 3, a pressurized air pump 4, a pressure sensor 5 and a flow rate sensor 6.

[0022] The pressurized tank 3 is installed in the shell 1. It should be understood that the shell 1 can have an openable and closed door, which not only allows the pressurized tank 3 to be installed and removed by opening the door, but also facilitates the maintenance of the pressurized tank 3. An opening is provided at the top of the shell 1. The outlet of the pressurized tank 3 is generally located at the top of the pressurized tank 3. The outlet of the pressurized tank 3 faces the opening. The pressurized air pump 4 is connected to the inlet of the pressurized tank 3 through a pipeline. The pressure relief valve 2 is installed on the pressurized tank 3, and the air inlet of the pressure relief valve 2 is connected to the outlet of the pressurized tank 3. Specifically, the flange of the pressure relief valve 2 is fixedly installed on the top of the shell 1, so that the pressure relief valve 2 is firmly fixed. A cover body 7 that can be covered on the outside of the pressure relief valve 2 is provided on the top of the shell 1. A diffuser hole 701 is provided on the side wall of the cover body 7, which can guide the gas after the pressure relief valve 2 is depressurized to be effectively dispersed through the diffuser hole 701. Specifically, the diffuser hole 701 can be provided on the entire side wall of the cover body 7, not limited to one side wall. The side wall of the pressurized tank 3 is provided with an installation port near the air release port 205 of the pressure release valve 2. The pressure sensor 5 is installed at the installation port. Preferably, the size of the installation port is the same as the size of the air release port 205 of the pressure release valve 2, so as to ensure that the internal pressure is consistent with the pressure at the air release port 205, thereby improving the measurement accuracy. The sensing head of the pressure sensor 5 extends into the pressurized tank 3, so that the gas pressure in the pressurized tank 3 can be detected. The flow rate sensor 6 is installed on the outer surface of the top of the housing 1 and is located in the cover body 7 after the cover is closed, so that the flow rate of the gas discharged from the air release port 205 of the pressure release valve 2 can be detected. In addition, a time relay is provided inside the flow rate sensor 6. The time relay is a gas micro-motion time relay. When the air flow enters the flow rate sensor 6 along the air inlet structure of the flow rate sensor 6, the time relay is driven to close, not only starting to measure the gas flow, but also starting to time, thereby realizing the simultaneous collection of gas flow rate and flow time data.

[0023] In addition, the pressure release valve detection device also includes: a controller 8. The pressure sensor 5 and the flow rate sensor 6 are both electrically connected to the controller 8, so that the detection data can be sent to the controller 8, and stored or processed by the controller 8. The pressure sensor 5 and the flow rate sensor 6 can be sensors with built-in batteries. In addition, the controller 8 can also be integrated with a power supply (such as a 24V power supply), so that the pressure sensor 5 and the flow rate sensor 6 are powered by the controller 8. A pull-out drawer 9 is provided at the bottom of the housing 1. The controller 8 is arranged in the drawer 9. The pressurized tank 3 is arranged on the top plate of the drawer 9.

[0024] Therefore, through the above-mentioned structural design, the pressurized air pump 4 is turned on to deliver gas to the pressurized tank 3, and the pressure sensor 5 can detect the gas pressure in the pressurized tank 3 in real time; when the pressure release valve 2 begins to deflate after the pressurized air pump 4 continuously increases the gas pressure in the pressurized tank 3, the leaked gas will be discharged along the diffuser hole 701. In this process, the air flow can enter the flow velocity sensor 6 along the air inlet structure of the flow velocity sensor 6, and drive the time relay to close, not only starting to measure the gas flow, but also starting the timing of the time relay, thereby realizing the simultaneous collection of gas flow rate and flow time data; thus, the gas pressure, gas flow rate and flow time data can be measured at the same time, improving the comprehensiveness of the detection. The data of the pressure release valve 2 collected by the sensor can be used as an important basis for the on-site injection amount of the converter transformer pressure release valve 2, the time calculation after the on-site action release and the accident restoration, which makes up for the shortcomings of the traditional relay protection test method.

[0025] In addition, the pressure relief valve in the prior art has poor rapid closing performance. In view of this, a pressure relief valve is designed in the embodiment of the present invention. Specifically, Figure 2 and 3 As shown, the pressure relief valve 2 includes: a relief valve housing 201, and a sealing gasket 202 and at least two sealing rings 203 with different diameters disposed in the relief valve housing 201. The number of sealing rings 203 can be set according to the requirements for sealing and rapid shut-off. The sealing rings 203 are generally made of rubber. Figure 2 and Figure 3 The number of sealing rings 203 shown is two. An air inlet 204 is provided at the bottom of the release valve housing 201. An air vent 205 is provided on the side wall of the release valve housing 201. It should be understood that the air vent 205 is openable and closable. The sealing gasket 202 is located above the air inlet 204 and can be crimped onto the air inlet 204. The area of ​​the sealing gasket 202 is larger than the area of ​​the air inlet 204, so that the air inlet 204 can be sealed. The material of the sealing gasket 202 is generally metal. The centers of at least two sealing rings 203 coincide, that is, the sealing rings 203 are a structure in which rings are nested. At least two sealing rings 203 are arranged between the lower surface of the sealing gasket 202 and the inner surface of the bottom of the release valve housing 201, which further strengthens the seal.

[0026] Specifically, at least two concentric first semicircular grooves 206 are provided on the lower surface of the sealing gasket 202. At least two concentric second semicircular grooves 207 are provided on the inner surface of the bottom of the release valve housing 201. The positions of each first semicircular groove 206 and each second semicircular groove 207 correspond to each other. The diameters of each first semicircular groove 206 and the corresponding second semicircular groove 207 are the same as the diameter of each sealing ring 203, so as to install the corresponding sealing ring 203. One of the two adjacent sealing rings 203 is installed in the first semicircular groove 206 with the same diameter as the sealing ring 203, and the other sealing ring 203 is installed in the second semicircular groove 207 with the same diameter as the sealing ring 203, that is, one of the two adjacent sealing rings 203 is installed on the lower surface of the sealing gasket 202, and the other is installed on the inner surface of the bottom of the release valve housing 201. This staggered installation method of at least two sealing rings 203 is more conducive to improving the sealing performance.

[0027] In a preferred embodiment, the sealing gasket 202 is designed to move up and down by the following structure. The pressure relief valve 2 also includes: a first spring 208. The upper surface of the sealing gasket 202 is connected to one end of the first spring 208. The other end of the first spring 208 is connected to the inner surface of the top of the release valve housing 201. The first spring 208 is always in a compressed state. More preferably, the upper surface of the sealing gasket 202 is provided with a first guide column 209 extending upward, and the inner surface of the top of the release valve housing 201 is provided with a second guide column 210 extending downward. One end of the first spring 208 is sleeved outside the first guide column 209, and the other end of the first spring 208 is sleeved outside the second guide column 210. The movement of the first spring 208 is limited by the guide column to avoid shaking left and right.

[0028] Through the above structural design, the gas in the pressurized tank 3 enters the air inlet 204. When the air vent 205 is opened, the gas in the pressurized tank 3 pushes the sealing gasket 202 (in the original state, the sealing gasket 202 is crimped above the air inlet 204 to seal the air inlet 204) and then is discharged from the air vent 205. After the air vent 205 is closed, the sealing gasket 202 can be tightly pressed above the air inlet 204 under the elastic force of the first spring 208 and its own gravity to seal the air inlet 204. Through the design of the first spring 208 and the sealing ring 203 that is nested in annularly, the valve formed by the sealing gasket 202 and the air inlet 204 can be quickly closed and stopped, and the pressure can be accurately controlled.

[0029] In another preferred embodiment, the sealing gasket 202 is moved up and down by the following structural design. The pressure relief valve 2 also includes: a second spring 211 and a hand wheel 212. An opening is provided at the top of the release valve housing 201. A third guide column 213 is provided on the upper surface of the sealing gasket 202. The hand wheel 212 is connected to one end of the rotating shaft 214. The other end of the rotating shaft 214 extends into the opening and is connected to the third guide column 213. The diameter of the rotating shaft 214 matches the diameter of the opening, thereby ensuring the sealing at the opening. The upper surface of the sealing gasket 202 is connected to one end of the second spring 211, and the other end of the second spring 211 is connected to the inner surface of the top of the release valve housing 201. The second spring 211 is sleeved outside the rotating shaft 214 and the third guide column 213, and the rotating shaft 214 and the third guide column 213 can limit the movement of the second spring 211 to avoid shaking left and right. The second spring 211 is always in a compressed state.

[0030] Through the above structural design, the gas in the pressurized tank 3 enters the air inlet 204. When the air vent 205 is opened, the gas in the pressurized tank 3 pushes the sealing gasket 202 and is discharged from the air vent 205. After closing the air vent 205, the air inlet 204 can be quickly sealed by pressing the hand wheel 212. The sealing gasket 202 can be tightly pressed above the air inlet 204 under the elastic force of the second spring 211 and its own gravity to seal the air inlet 204. Through the design of the hand wheel 212, the second spring 211 and the sealing ring 203, the valve formed by the sealing gasket 202 and the air inlet 204 can be quickly closed and stopped, and the pressure can be accurately controlled.

[0031] In summary, the pressure relief valve detection device of the embodiment of the present invention collects various data of the converter transformer pressure relief valve during the detection process, thereby improving the comprehensiveness of the detection, thereby increasing the effective basis for evaluating the detection status of the converter transformer pressure relief valve, reducing the test items for manual testing, and improving the efficiency of the detection work.

[0032] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A pressure relief valve detection device, characterized in that: include: Housing, pressure relief valve, pressurized tank, pressurized air pump, pressure sensor and flow rate sensor; The pressure release valve comprises: a release valve housing, and a sealing gasket and at least two sealing rings with different diameters arranged in the release valve housing and movable up and down, an air inlet is provided at the bottom of the release valve housing, an air release port which can be opened and closed is provided on the side wall of the release valve housing, the sealing gasket is located above the air inlet and can be pressed on the air inlet, the area of ​​the sealing gasket is larger than the area of ​​the air inlet, the centers of at least two of the sealing rings coincide, and at least two of the sealing rings are arranged between the lower surface of the sealing gasket and the inner surface of the bottom of the release valve housing; The pressurized tank is installed in the shell, the top of the shell is provided with an opening, the outlet of the pressurized tank faces the opening, the pressurized air pump is connected to the inlet of the pressurized tank through a pipeline, the pressure relief valve is installed on the pressurized tank, and the air inlet of the pressure relief valve is communicated with the outlet of the pressurized tank, the top of the shell is provided with a cover body that can cover the outside of the pressure relief valve, the side wall of the cover body is provided with air diffusion holes, the side wall of the pressurized tank is provided with an installation port near the air release port of the pressure relief valve, the pressure sensor is installed at the installation port, the sensing end of the pressure sensor extends into the pressurized tank, and the flow rate sensor is installed on the outer surface of the top of the shell, and is located in the cover body after the cover is closed; The flange of the pressure relief valve is fixedly mounted on the top of the housing; The size of the installation port is the same as the size of the air release port of the pressure relief valve.

2. The pressure relief valve detection device according to claim 1, characterized in that: The flow rate sensor has a time relay inside.

3. The pressure relief valve detection device according to claim 1, characterized in that: The lower surface of the sealing gasket is provided with at least two concentric first semicircular grooves, and the inner surface of the bottom of the release valve housing is provided with at least two concentric second semicircular grooves, the positions of each of the first semicircular grooves and each of the second semicircular grooves correspond to each other, the diameters of each of the first semicircular grooves and the corresponding second semicircular grooves are the same as the diameter of each of the sealing rings, one of the two adjacent sealing rings is installed in a first semicircular groove with the same diameter as the sealing ring, and the other sealing ring is installed in a second semicircular groove with the same diameter as the sealing ring.

4. The pressure relief valve detection device according to claim 1, characterized in that: The pressure relief valve further comprises: a first spring, the upper surface of the sealing gasket is connected to one end of the first spring, the other end of the first spring is connected to the inner surface of the top of the relief valve housing, and the first spring is always in a compressed state.

5. The pressure relief valve detection device according to claim 4, characterized in that: The upper surface of the sealing gasket is provided with a first guide column extending upward, the inner surface of the top of the release valve housing is provided with a second guide column extending downward, one end of the first spring is sleeved outside the first guide column, and the other end of the first spring is sleeved outside the second guide column.

6. The pressure relief valve detection device according to claim 1, characterized in that: The pressure relief valve also includes: a second spring and a handwheel, an opening is provided at the top of the relief valve housing, a third guide column is provided on the upper surface of the sealing gasket, the handwheel is connected to one end of the rotating shaft, the other end of the rotating shaft extends into the opening and is connected to the third guide column, the diameter of the rotating shaft matches the diameter of the opening, the upper surface of the sealing gasket is connected to one end of the second spring, the other end of the second spring is connected to the inner surface of the top of the relief valve housing, the second spring is sleeved outside the rotating shaft and the third guide column, and the second spring is always in a compressed state.

7. The pressure relief valve detection device according to claim 1, characterized in that: Also includes: The controller is electrically connected to the pressure sensor and the flow rate sensor.

8. The pressure relief valve detection device according to claim 7, characterized in that: A pull-out drawer is provided at the bottom of the shell, and the controller is arranged in the drawer.

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