A high anti-vibration intelligent density monitoring device and system

Abstract

An embodiment of the present invention relates to a highly vibration-resistant intelligent density monitoring device and system. The device includes: a relay module, which includes a moving contact and a static contact having a first connection end and a second connection end. The first connection end of the moving contact is connected to the electrical equipment to be monitored and undergoes a displacement movement in the contact direction relative to the static contact according to the gas density change of the electrical equipment to be monitored; the static contact is connected to the control equipment; a vibration-resistant module, which includes an engagement unit and a stopping unit. The engagement unit reciprocates following the displacement movement of the moving contact; the stopping unit prevents the engagement unit from moving when vibration occurs to lock the displacement movement of the moving contact. The technical solution of the embodiment of the present invention realizes the triggering of the normal density relay function in the vibration-free state by using the instantaneous change and inertial effect brought by vibration to make the contact act for a short time, and can effectively lock the contact when vibration occurs.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of electrical equipment, and in particular, to a highly vibration-resistant intelligent density monitoring device and system. Background Art

[0002] At present, sulfur hexafluoride (SF6) electrical equipment has been widely used in the power sector, industrial and mining enterprises, promoting the rapid development of the power industry. Ensuring the reliable and safe operation of sulfur hexafluoride (SF6) electrical equipment has become one of the important tasks of the power sector. The role of sulfur hexafluoride (SF6) gas in electrical equipment is arc extinguishing and insulation, and air leakage should not occur. When the density of sulfur hexafluoride (SF6) gas in the equipment decreases to a certain extent, the insulation and arc extinguishing performance will be lost, thus unable to ensure the reliable and safe operation of sulfur hexafluoride (SF6) electrical equipment. Currently, density relays used to monitor the density of sulfur hexafluoride (SF6) gas generally use mechanical pointer-type sulfur hexafluoride (SF6) gas density relays or relative cavity-type sulfur hexafluoride (SF6) density relays to monitor the density of sulfur hexafluoride (SF6) gas. When air leakage occurs in sulfur hexafluoride (SF6) electrical equipment, the density relay can output alarm and locking signals to ensure the safe operation of the electrical equipment. A mechanical pointer-type density relay generally consists of a dial, a pointer, a Bourdon tube, a temperature compensation element, a base, a movement, and a hairspring-type magnetic-assisted electrical contact or a microswitch. When the contact (alarm or lock) of this density relay closes, its closing force depends only on the tiny force of the contact hairspring or the microswitch. Even with the addition of the magnetic-assisted force or the elastic force of the elastic element inside the microswitch, it is still very small. Therefore, when facing relatively large vibrations, it is prone to unstable phenomena such as disconnection and re-closure. At the same time, after a long period of daily work, its contact closure is not firm enough, and it is easy to occur false alarms or locks in the non-leakage state caused by vibrations, resulting in a lot of effort being spent on identifying and handling such phenomena in equipment operation and maintenance.

[0003] At the same time, with the increase in the number of substations and the enrichment of equipment types, the negative impacts of the above-mentioned defects of the density relay itself in actual applications have become more prominent, especially as many substations are located in remote areas. The sensitivity of the density relay itself to vibrations has brought an increasingly obvious burden to the maintenance work. Therefore, there is an urgent need for a sulfur hexafluoride (SF6) gas density monitoring device with excellent vibration resistance. Summary of the Invention

[0004] Based on the above situation of the prior art, the purpose of the embodiments of the present invention is to provide a highly vibration-resistant intelligent density monitoring device and system. By utilizing the instantaneous changes and inertial effects brought about by vibration to cause the contact to actuate and lock for a short period of time, and consuming energy through gravity and internal resistance to self-recover to normal operation, it solves the technical problem that the contact generates misoperation due to vibration, resulting in mis-alarm of the contact point and mis-operation of the equipment.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a highly vibration-resistant intelligent density monitoring device, the device comprising:

[0006] A relay module, including a moving contact and a static contact having a first connection end and a second connection end. The first connection end of the moving contact is connected to the electrical equipment to be monitored, and the moving contact undergoes a displacement movement in the contact direction relative to the static contact according to the gas density change of the electrical equipment to be monitored; the static contact is connected to the control equipment;

[0007] An anti-vibration module, including an engagement unit and a stopping unit. The engagement unit is meshed and connected to the second connection end on the moving contact and reciprocates following the displacement movement of the moving contact; the stopping unit prevents the movement of the engagement unit during vibration to lock the displacement movement of the moving contact.

[0008] Further, the anti-vibration module unlocks the locking of the displacement movement of the moving contact if no further vibration occurs within a predetermined time after the vibration occurs.

[0009] Further, a groove for connection and cooperation with the engagement unit is provided on the moving contact of the relay module to form the second connection end;

[0010] The engagement unit includes at least two protrusions that cooperate with the groove. When reciprocating, the at least two protrusions are inserted into the groove in turn.

[0011] Further, the engagement unit includes a stopping groove that cooperates with the stopping unit;

[0012] The stopping unit inserts into the stopping groove during vibration to lock the displacement movement of the moving contact.

[0013] Further, the stopping unit includes a stopping rod and an elastic member connected to the stopping rod;

[0014] The stopping rod moves linearly in the telescopic direction of the elastic member following the telescopic movement of the elastic member.

[0015] Further, the stopping unit includes an inertia component, and the inertia component is flexibly connected to the stopping rod;

[0016] In the non-vibrating state, the combined gravity of the inertial component and the stop rod acts on the elastic component, reaching an equilibrium with the elastic force of the elastic component itself under the action of gravity, causing the stop rod to disengage from the stop groove and allowing the engaging unit to move freely;

[0017] In the vibrating state, the mechanical equilibrium between the gravity of the inertial component and the stop rod and the elastic force of the elastic component itself under the action of gravity is disrupted, causing the elastic component to swing back and forth in its telescopic direction and pushing the stop rod to move into and engage with the stop groove, locking the movement of the engaging unit.

[0018] Furthermore, within a predetermined time after vibration occurs, if no further vibration occurs, the flexible connection between the inertial component and the stop rod oscillates until the energy dissipates, and then restores the mechanical equilibrium between the gravity of the inertial component and the stop rod and the elastic force of the elastic component itself under the action of gravity;

[0019] During the oscillation process, the moving contact remains in the locked state.

[0020] According to another aspect of the present invention, there is provided a highly vibration-resistant intelligent density monitoring system, including a highly vibration-resistant intelligent density monitoring device, an intelligent monitoring device, and a host computer;

[0021] The highly vibration-resistant intelligent density monitoring device includes the highly vibration-resistant intelligent density monitoring device as described in the first aspect of the present invention;

[0022] The intelligent monitoring device is connected to the highly vibration-resistant intelligent density monitoring device and the electrical equipment to be monitored, and is used to calculate the gas density value of the electrical equipment to be monitored;

[0023] The intelligent monitoring device is also communicatively connected to the host computer, and uploads the gas density value of the electrical equipment to be monitored to the host computer.

[0024] Furthermore, the intelligent monitoring device includes a displacement sensor, a temperature sensor, an intelligent processor, and a communication unit;

[0025] The displacement sensor is connected to the moving contact of the relay module, detects the displacement change value of the moving contact, and sends the displacement change value to the intelligent processor;

[0026] The temperature sensor is used to collect the temperature value of the electrical equipment to be monitored;

[0027] The intelligent processor calculates the gas density value of the electrical equipment to be monitored according to the displacement change value and the temperature value based on a preset mathematical model.

[0028] The communication unit is used to upload the calculated gas density value of the electrical equipment to be monitored to the host computer.

[0029] Furthermore, the communication unit includes wired communication and wireless communication.

[0030] In summary, the embodiment of the present invention provides a highly anti-vibration intelligent density monitoring device and system. The device includes: a relay module, which includes a moving contact and a static contact having a first connection end and a second connection end. The first connection end of the moving contact is connected to the electrical equipment to be monitored, and the moving contact moves in the contact direction relative to the static contact according to the gas density change of the electrical equipment to be monitored; the static contact is connected to the control equipment; an anti-vibration module, which includes an engagement unit and a stopping unit. The engagement unit is engaged with the second connection end on the moving contact and reciprocates following the displacement movement of the moving contact; the stopping unit prevents the engagement unit from moving when vibration occurs to lock the displacement movement of the moving contact. The technical solution of the embodiment of the present invention makes use of the instantaneous change and inertial effect brought by vibration to make the contact act and lock for a short time, and consumes energy through gravity and internal resistance and then returns to normal operation by itself, realizing the triggering of the normal density relay function in the non-vibration state. At the same time, when vibration occurs, the contact can be effectively locked, thereby preventing the contact from malfunctioning due to vibration, resulting in the phenomenon of false alarm of the contact and misoperation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the front view of the highly anti-vibration intelligent density monitoring device provided by the embodiment of the present invention;

[0032] Figure 2 is the side view of the highly anti-vibration intelligent density monitoring device provided by the embodiment of the present invention;

[0033] Figure 3 is the block diagram of the composition of the intelligent monitoring device provided by the embodiment of the present invention.

[0034] Description of the reference numerals:

[0035] 101 - static contact; 102 - housing; 201 - moving contact; 301 - ratchet; 302 - stopping groove; 401 - elastic component; 501 - stopping rod; 601 - inertial component; 701 - displacement sensor; 801 - temperature sensor; 901 - intelligent processor; 1001 - power supply; 1101 - communication unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0037] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of the present invention should have the ordinary meaning understood by those of ordinary skill in the art to which this disclosure belongs. The "first", "second" and similar terms used in one or more embodiments of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0038] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. An embodiment of the present invention provides a highly vibration-resistant intelligent density monitoring device, and the device includes a relay module and a vibration-resistant module. The relay module can be a microswitch contact used in an existing sulfur hexafluoride (SF6) density relay, and this contact is connected to the electrical equipment to be monitored, and generates a displacement when the density of the sulfur hexafluoride (SF6) gas in the electrical equipment to be monitored changes (which can act through a pressure change). In this embodiment of the present invention, a vibration-resistant module is added on the basis of the microswitch contact, so that in the normal working state, the vibration-resistant module does not participate in the normal operation of the contact. When the whole comes into contact with vibration, the vibration-resistant module can accurately intervene through its own structural characteristics, lock the contact so that it cannot change its state due to vibration, and ensure that it will be unlocked after a certain delay for a period of time after the vibration. In this embodiment of the present invention, the relay module includes a moving contact and a stationary contact having a first connection end and a second connection end. The first connection end of the moving contact is connected to the electrical equipment to be monitored, and the moving contact moves in the contact direction relative to the stationary contact according to the gas density change of the electrical equipment to be monitored; the stationary contact is connected to the control equipment; the vibration-resistant module includes an engagement unit and a stop unit. The engagement unit is engaged with the second connection end on the moving contact and reciprocates with the displacement movement of the moving contact; the stop unit prevents the movement of the engagement unit when vibration occurs to lock the displacement movement of the moving contact. The vibration-resistant module unlocks the locked displacement movement of the moving contact if no further vibration occurs within a predetermined time after the vibration occurs.

[0039] Figure 1 The front view of the highly vibration-resistant intelligent density monitoring device is shown in Figure 2 The side view of the highly vibration-resistant intelligent density monitoring device is shown in the following in conjunction with Figure 1 and Figure 2A detailed description of the high anti-vibration intelligent density monitoring device is given. The moving contact 201 of the relay module is provided with a groove for connecting and cooperating with the meshing unit to form a second connection end. A groove matching the ratchet is arranged inside the moving contact 201, and this groove can be matched and engaged with the ratchet. Through the above cooperation, when the ratchet can rotate freely, the relay module can complete the normal contact opening and closing function, while in the state where the ratchet is locked, the moving contact of the relay module cannot move. The ratchet can rotate freely in the non-vibrating state and does not affect the displacement of the moving contact 201 with the change of gas density (pressure).

[0040] The meshing unit includes at least two protrusions that cooperate with the groove. When performing reciprocating motion, the at least two protrusions are inserted into the groove in turn. Figure 1 and Figure 2 In the high anti-vibration intelligent density monitoring device shown, taking the meshing unit composed of the ratchet 301 as an example for description, and this meshing unit is not limited to the ratchet, and can also be other mechanical structures such as gears and linkages that can achieve the functions described in the present invention. The meshing unit further includes a stop groove that cooperates with the stop unit; the stop unit inserts into the stop groove when vibration occurs to lock the displacement movement of the moving contact.

[0041] The stop unit includes a stop rod 501 and an elastic component 401 connected to the stop rod; the stop rod 501 moves linearly in the telescopic direction of the elastic component 401 following the telescopic movement of the elastic component 401. The stop unit further includes an inertia component 601, and the inertia component 601 is flexibly connected to the stop rod 501. The inertia component 601 can be, for example, a heavy object component with a certain weight.

[0042] In the non-vibrating state, the combined gravity of the inertia component 601 and the stop rod 501 acts on the elastic component 401, reaching an equilibrium with the elastic force of the elastic component 401 itself under the action of gravity, so that the stop rod 501 just disengages from the stop groove 302 on the ratchet 301, enabling the ratchet 301 to rotate freely and the meshing unit to move freely; in the vibrating state, due to vibration conduction of the inertia component, because the connection between the stop rod 501 and the inertia component 601 is a flexible connection, the inertia component 601 will conduct vibration slowly due to the flexible connection part during vibration, and the elastic component 401 vibrates as a whole, and the gravity of the inertia component 601 connected below it changes suddenly, breaking the mechanical equilibrium between the previous gravity of the inertia component 601 and the stop rod 501 and the elastic force of the elastic component 401 itself under the action of gravity, causing the elastic component 401 to swing back and forth in its telescopic direction and pushing the stop rod 501 to move partially into the stop groove 302, locking the ratchet 301 so that it cannot rotate, that is, the movement of the meshing unit is locked. As a result, the moving contact 201 cannot come into contact with or disengage from the static contact 101, so that the relay module cannot generate a false action due to vibration and send a false alarm signal.

[0043] Within a predetermined time after the vibration occurs, if no further vibration occurs, the flexible connection between the inertial component 601 and the stop lever 501 will oscillate, and after the energy is exhausted, it will restore the balance with the elastic force of the elastic component 401 before the vibration resumes. During the above oscillation process, the moving contact 201 will always remain locked, thus preventing the influence of aftershock fluctuations on the contact.

[0044] An embodiment of the present invention further provides a highly vibration-resistant intelligent density monitoring system, including a highly vibration-resistant intelligent density monitoring device, an intelligent monitoring device, and a host computer. Among them, the highly vibration-resistant intelligent density monitoring device is, for example, the highly vibration-resistant intelligent density monitoring device described in the above embodiments of the present invention. The intelligent monitoring device is connected to the highly vibration-resistant intelligent density monitoring device and the electrical equipment to be monitored, and is used to calculate the gas density value of the electrical equipment to be monitored. The intelligent monitoring device includes a displacement sensor 701, a temperature sensor 801, an intelligent processor 901, and a communication unit 1101. The displacement sensor 701 is connected to the moving contact 201 of the relay module (the displacement sensor 701 can be fixed near the moving contact 201 and maintain a relative distance) to directly detect the displacement change value of the moving contact 201 and send the displacement change value to the intelligent processor 901; the temperature sensor 801 is used to collect the temperature value of the electrical equipment to be monitored; the intelligent processor 901 is respectively connected to the temperature sensor 801, the displacement sensor 701, and the communication unit 1101, and calculates the gas density value of the electrical equipment to be monitored according to the displacement change value, the temperature value, and a preset mathematical model. The intelligent processor 901 can be implemented by a general computer, an industrial control computer, a CPU, a single-chip microcomputer, an ARM chip, an AI chip, a quantum chip, a photon chip, an MCU, an FPGA, a PLC, etc., an industrial control main board, an embedded main control board, etc. The preset data model can be based on the technical solutions involved in the patents already applied by the applicant of this application, or can be based on the methods involved in the gas density monitoring scheme of electrical equipment, which will not be elaborated here one by one. The intelligent monitoring device also communicates with the host computer through the communication unit 1101, and is used to upload the calculated gas density value of the electrical equipment to be monitored, as well as the monitored gas pressure value, temperature value, etc. to the host computer. Among them, the communication unit 1101 can communicate in wired communication and wireless communication modes. The intelligent monitoring device also includes a power supply 1001 to supply power to each module in the device. The power supply 1001 can be a switching power supply, AC 220V, DC power supply, LDO, programmable power supply, solar energy, storage battery, rechargeable battery, battery, etc.

[0045] In summary, the embodiments of the present invention relate to a highly vibration-resistant intelligent density monitoring device and system. The device includes: a relay module, which includes a moving contact and a static contact having a first connection end and a second connection end. The first connection end of the moving contact is connected to the electrical equipment to be monitored, and the moving contact undergoes a displacement movement in the contact direction relative to the static contact according to the gas density change of the electrical equipment to be monitored; the static contact is connected to the control equipment; a vibration-resistant module, which includes an engagement unit and a stopping unit. The engagement unit is engaged with the second connection end on the moving contact and reciprocates following the displacement movement of the moving contact; the stopping unit prevents the engagement unit from moving when vibration occurs to lock the displacement movement of the moving contact. The technical solution of the embodiments of the present invention makes use of the instantaneous change and inertial effect brought by vibration to make the contact act for a short time of locking, and consumes energy through gravity and internal resistance and then resumes normal operation by itself, realizing the triggering of the normal density relay function in the non-vibrating state. At the same time, when vibration occurs, the contact can be effectively locked, thereby preventing the contact from malfunctioning due to vibration, resulting in the phenomenon of false alarm of the contact and misoperation of the equipment.

[0046] It should be understood that the discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the present invention as described above, which are not provided in detail for the sake of brevity. The above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention and do not constitute a limitation to the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention shall be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims or the equivalent forms of such scope and boundaries.

Claims

1. A high anti-vibration intelligent density monitoring device, characterized in that, The device includes: A relay module, which includes a moving contact and a static contact having a first connection end and a second connection end. The first connection end of the moving contact is connected to the electrical equipment to be monitored. The moving contact undergoes a displacement movement in the contact direction relative to the static contact according to the gas density change of the electrical equipment to be monitored. The static contact is connected to the control equipment; An anti-vibration module, which includes an engagement unit and a stop unit. The engagement unit is meshed and connected to the second connection end on the moving contact and reciprocates following the displacement movement of the moving contact. The stop unit prevents the engagement unit from moving during vibration to lock the displacement movement of the moving contact.

2. The device according to claim 1, characterized in that, The anti-vibration module unlocks the locked displacement movement of the moving contact if no further vibration occurs within a predetermined time after the vibration occurs.

3. The device according to claim 1, wherein, The moving contact of the relay module is provided with a groove that is connected and cooperates with the engagement unit to form the second connection end; The engagement unit includes at least two protrusions that cooperate with the groove. During the reciprocating movement, the at least two protrusions are sequentially inserted into the groove in turn.

4. The device according to claim 2 or 3, characterized in that The engagement unit includes a stop groove that cooperates with the stop unit; The stop unit inserts into the stop groove during vibration to lock the displacement movement of the moving contact.

5. The device according to claim 4, characterized in that, The stop unit includes a stop rod and an elastic member connected to the stop rod; The stop rod moves linearly in the telescopic direction of the elastic member following the telescopic movement of the elastic member.

6. The device according to claim 5, wherein, The stop unit includes an inertia component, and the inertia component is flexibly connected to the stop rod; In a vibration-free state, the combined gravity of the inertia component and the stop rod acts on the elastic member, reaching an equilibrium with the elastic force of the elastic member under the action of gravity itself, so that the stop rod disengages from the stop groove and the engagement unit moves freely; In a vibration state, the mechanical equilibrium of the gravity of the inertia component and the stop rod and the elastic force of the elastic member itself under the action of gravity is destroyed, causing the elastic member to swing reciprocally in its telescopic direction and pushing the stop rod to move into and embed in the stop groove, locking the movement of the engagement unit.

7. The device according to claim 6, wherein If no further vibration occurs within a predetermined time after the vibration occurs, the flexible connection between the inertia component and the stop rod oscillates until the energy disappears and then restores the mechanical equilibrium of the gravity of the inertia component and the stop rod and the elastic force of the elastic member itself under the action of gravity; During the oscillation process, the moving contact remains in the locked state.

8. A high anti-vibration intelligent density monitoring system, characterized in that, It includes a high anti-vibration intelligent density monitoring device, an intelligent monitoring device, and a host computer; The high anti-vibration intelligent density monitoring device includes the high anti-vibration intelligent density monitoring device according to any one of claims 1-7; The intelligent monitoring device is connected to the high anti-vibration intelligent density monitoring device and the electrical equipment to be monitored, and is used to calculate the gas density value of the electrical equipment to be monitored; The intelligent monitoring device is also communicatively connected to the host computer and uploads the gas density value of the electrical equipment to be monitored to the host computer.

9. The system according to claim 8, wherein The intelligent monitoring device includes a displacement sensor, a temperature sensor, an intelligent processor, and a communication unit; The displacement sensor is connected to the moving contact of the relay module, detects the displacement change value of the moving contact, and sends the displacement change value to the intelligent processor; The temperature sensor is used to collect the temperature value of the electrical equipment to be monitored; The intelligent processor calculates the gas density value of the monitored electrical equipment according to the displacement change value and the temperature value based on a preset mathematical model; The communication unit is used to upload the calculated gas density value of the monitored electrical equipment to the host computer.

10. The system according to claim 9, wherein The communication unit includes wired communication and wireless communication.

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