Vacuum degree detection device, method, computer equipment and computer readable storage medium

Abstract

The present invention discloses a vacuum detection device, method, computer equipment, and computer storage device. The vacuum detection device includes: a second air chamber structure, wherein a second air chamber is provided within the second air chamber structure; a first air chamber structure, wherein a first air chamber is provided within the first air chamber structure, and the second air chamber surrounds the first air chamber; a vacuum interrupter, wherein the first air chamber surrounds the vacuum interrupter; a first air pressure monitoring meter, connected to the second air chamber and used to measure the air pressure within the second air chamber; and a second air pressure monitoring meter, connected to the first air chamber and used to measure the air pressure within the first air chamber. The vacuum detection device determines whether the vacuum interrupter has failed by changing the air pressure in the first air chamber, thereby achieving online monitoring of the vacuum degree of the vacuum interrupter.

Description

Technical Field

[0001] The present invention belongs to the technical field of vacuum degree detection, and in particular relates to a vacuum degree detection device, method, computer equipment and computer-readable storage medium. Background Art

[0002] With rapid economic development and increasing load capacity, the problem of excessive short-circuit currents is becoming increasingly serious. Short-circuit currents exceeding the interrupting current capacity of circuit breakers can lead to fault interruption failures, seriously impacting the safe operation of power grids. Installing fault current limiters (FCLs) in the power grid and fast-acting circuit breakers at busbars or sections is an effective means of addressing excessive short-circuit currents. FCLs consist of fast-acting switches and shunt reactors. The core component of fast-acting switches and circuit breakers is the vacuum interrupter, which rapidly interrupts the arc. With increasing emphasis on environmental protection worldwide, the widely used SF6 insulating gas in circuit breakers is being phased out in favor of environmentally friendly gases. These gas circuit breakers utilize vacuum interrupters to interrupt the arc.

[0003] Vacuum interrupter circuit breakers and switches are increasingly used, but there's currently no effective online monitoring method for the vacuum level of these chambers, posing risks. When the circuit breaker opens and arcs, the arc in the vacuum interrupter, if the vacuum level is compromised, cannot be extinguished. After a certain period of time, the arc can cause the chamber to rupture, damaging the breaker's internal structure. Online monitoring of the vacuum level in vacuum interrupters has become one of the biggest obstacles hindering the application of these circuit breakers and switches. Summary of the Invention

[0004] Purpose of the invention: The present invention provides a vacuum detection device, method, computer equipment and computer-readable storage medium, which can solve the problem of risks in online monitoring of the vacuum degree of the vacuum interrupter of the circuit breaker.

[0005] Technical solution:

[0006] A vacuum detection device, comprising:

[0007] a second air chamber structure, wherein a second air chamber is provided in the second air chamber structure;

[0008] a first air chamber structure, wherein a first air chamber is provided in the first air chamber structure, and the second air chamber surrounds the first air chamber;

[0009] a vacuum interrupter chamber, wherein the first gas chamber surrounds the vacuum interrupter chamber;

[0010] a first air pressure monitoring meter, the first air pressure monitoring meter being connected to the second air chamber and being used to measure the air pressure in the second air chamber;

[0011] A second air pressure monitoring meter is connected to the first air chamber and is used to measure the air pressure in the first air chamber.

[0012] In some embodiments, the second air chamber structure includes a support tube, a second cover plate and a second support plate respectively provided at both ends of the support tube;

[0013] The first air chamber structure is arranged in the support cylinder, and the first air chamber structure includes an axially arranged first cylinder and a second cylinder, a first support disk is provided between the first cylinder and the second cylinder, a first cover plate is provided at one end of the first cylinder away from the first support disk, a bellows is provided at one end of the second cylinder away from the first support disk, the second cylinder is connected to the second support disk, and a pull ring is provided in the second cylinder.

[0014] In some embodiments, the support cylinder, the second cover plate, the second support plate, the first cover plate, the first cylinder and the second cylinder form the second air chamber;

[0015] The first cover plate, the first cylinder, the second cylinder, the vacuum interrupter and the bellows form the first air chamber;

[0016] The vacuum interrupter is located in a cavity enclosed by the first cover plate, the first cylinder, and the first support plate.

[0017] In some embodiments, the pull ring and the second cylinder are coaxially arranged; the vacuum interrupter and the first cylinder are coaxially arranged; the pull ring is located in a space enclosed by the first support plate, the second cylinder, the second support plate and the bellows.

[0018] In some embodiments, the first cover plate, the first cylinder, the first support plate, the second support plate and the bellows are sequentially connected in series; and

[0019] The second cover plate, the support tube and the second support disk are sequentially connected in series.

[0020] In some embodiments, the vacuum interrupter includes a static contact and a moving contact, a first chamber is provided in the vacuum interrupter, one end of the static contact passes through the first cover plate and extends into the second air chamber, the other end of the static contact is located in the first chamber, one end of the moving contact passes through the first support plate and is connected to the pull ring, and the other end of the moving contact is located in the first chamber.

[0021] In some embodiments, the first air chamber structure further includes a connecting piece, one end of which passes through the bellows and is connected to the pull ring, and the other end of which is connected to the repulsion mechanism.

[0022] The present application also provides a detection method based on the vacuum detection device, comprising the following steps:

[0023] Assume the rated pressure of the second air chamber is P 30 , the rated pressure of the first air chamber is P 20 , the pressure constants of the first air chamber are Pb j1 , Pb j2 , Pb j3 、P bs1 , the pressure constants of the second air chamber are P bj1 、P bj4 、P bs2 Among them, P bj1 is the leakage alarm value between the second air chamber and the first air chamber, P bj2 is the leakage alarm value of the vacuum interrupter, P bj3 is the leakage alarm value of the first air chamber, P bs1 is the leakage blocking value of the first air chamber, P bj1 is the leakage alarm value between the second air chamber and the first air chamber, P bj4 is the leakage alarm value of the second air chamber, P bs2 is the leakage blocking value of the second air chamber; and, P 30 >P 20 , P 30 >P bj1 >P 20 , P 20 >P bj2 >P bj3 >P bs1 , P bj1 >P bj4 >P bs2 ;

[0024] The air pressure of the first air chamber is detected to be P2, and the air pressure of the second air chamber is detected to be P3. When P2>P bj1 When P3=P2, it will report "Gas leakage between the second and first air chambers, waiting for power outage for maintenance"; when P2 <P bj2 When P2 <P bj3 When P2 <P bs1 When P3 <P bj4 When P3 <P bs2 When the power is cut off for maintenance, the vacuum degree of the vacuum interrupter is tested.

[0025] In some embodiments, the sensitivity of the first air pressure monitoring meter and the second air pressure monitoring meter is ΔP, P bj1 、P 20 、P bj2 、P bj3 、P bs1 The differences are all greater than △P, P 30 、P bj1 、P bj4 、P bs2 The difference is greater than △P; (P 20 +0.1)*V2=(P bj2 +0.1)*(V1+V2),

[0026] (P 20 +0.1)*V2+(P 30 +0.1)*V3=(P bj1 +0.1)*(V2+V3), where V1 is the inner volume of the vacuum interrupter, V2 is the volume of the first gas chamber, and V3 is the volume of the second gas chamber.

[0027] In some embodiments, when a power outage occurs for maintenance, testing the vacuum degree of the vacuum interrupter includes the following steps:

[0028] Multiple vacuum interrupters of a circuit breaker are connected in series. Each vacuum interrupter includes a static contact and a moving contact. A distance d is set between the static contact and the moving contact of a vacuum interrupter to be tested, while the other vacuum interrupters are closed.

[0029] Obtain a breakdown voltage value V0 of the vacuum interrupter. When the factory vacuum degree is intact, the breakdown voltage value of the distance d between the static contact and the moving contact of the vacuum interrupter is V. The difference between V0 and V is △V. If △V is within a preset deviation range, the vacuum degree of the vacuum interrupter is intact. If not, the vacuum interrupter is leaking.

[0030] The present application also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the method are implemented when the processor executes the computer program.

[0031] The present application also provides a computer-readable storage medium having a computer program stored thereon, and the steps of the method are implemented when the computer program is executed by a processor.

[0032] Beneficial Effects: Compared to the prior art, the vacuum detection device of the present invention comprises: a second air chamber structure, wherein a second air chamber is provided within the second air chamber structure; a first air chamber structure, wherein a first air chamber is provided within the first air chamber structure, and the second air chamber surrounds the first air chamber; a vacuum interrupter, wherein the first air chamber surrounds the vacuum interrupter; a first air pressure monitoring meter connected to the second air chamber; and a second air pressure monitoring meter connected to the first air chamber. This vacuum detection device employs a dual-chamber design. When the vacuum interrupter leaks, the air pressure in the first air chamber drops significantly. By setting a leakage constant, leaks in the vacuum interrupter can be effectively detected, thereby resolving the risk associated with online vacuum level monitoring in circuit breakers. The detection method of the vacuum detection device is as follows: the rated air pressure of the second air chamber is greater than the rated air pressure of the first air chamber, and the volume of the second air chamber is much larger than the volume of the first air chamber. When there is air leakage between the second air chamber and the first air chamber, the air pressure of the second air chamber will obviously exceed the rated air pressure. By setting a leakage constant value, the air leakage between the second air chamber and the first air chamber can be effectively detected without removing the vacuum interrupter from the circuit breaker for detection. The method is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0034] Figure 1 A schematic structural diagram of a vacuum degree detection device provided in an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the rated air pressure and set air pressure of the first air chamber;

[0036] Figure 3 A schematic diagram of the rated air pressure and set air pressure of the second air chamber;

[0037] Figure 4 This is the vacuum test circuit diagram of the vacuum interrupter;

[0038] Figure markings, 1-vacuum interrupter, 10-first chamber, 101-static contact, 102-moving contact, 2-first air chamber, 3-second air chamber, 4-first air pressure monitoring meter, 5-second air pressure detection meter, 201-first cover plate, 202-first cylinder, 203-first support plate, 204-second cylinder, 205-pull ring, 206-second support plate, 207-bellows, 208-connecting piece, 301-support cylinder, 302-second cover plate. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" 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, an electrical connection, or mutual communication; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly specified and specifically limited. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0041] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0042] See also Figure 1 The present invention provides a vacuum degree detection device for vacuum degree detection, which is used to realize online monitoring of the vacuum degree of a vacuum interrupter in a circuit breaker, and belongs to the field of vacuum degree detection technology. The vacuum degree detection device includes: a vacuum interrupter 1, a first air chamber structure, a second air chamber structure, a first air pressure monitoring meter 4, and a second air pressure detection meter 5. A first chamber 10 is provided in the vacuum interrupter 1, a second air chamber 3 is provided in the second air chamber structure, the first air chamber structure is placed in the second air chamber 3, a first air chamber 2 is provided in the first air chamber structure, the second air chamber 3 surrounds the first air chamber 2, the vacuum interrupter 1 is placed in the first air chamber 2, and the first air chamber 2 surrounds the vacuum interrupter 1; the first air pressure monitoring meter 4 is connected to the second air chamber 3, and the first air pressure monitoring meter 4 is used to monitor the air pressure of the second air chamber 3; the second air pressure monitoring meter 5 is connected to the first air chamber 2, and the second air pressure monitoring meter 5 is used to monitor the air pressure of the first air chamber 2.

[0043] The second air chamber structure 3 includes a support tube 301, a second cover plate 302 and a second support plate 206, and the second cover plate 302 and the second support plate 206 are respectively arranged at both ends of the support tube 301; the first air chamber structure is arranged in the support tube 301, and the first air chamber structure 2 includes a first cylinder body 202, a second cylinder body 204, a first support plate 203, a first cover plate 201, a second support plate 206, a bellows 207, a pull ring 205 and a connecting piece 208.

[0044] The first cylinder 202 and the second cylinder 204 are axially arranged, and a first support disk 203 is provided between the first cylinder 202 and the second cylinder 204. A first cover plate 201 is provided at the end of the first cylinder 202 away from the first support disk 203, and a bellows 207 is provided at the end of the second cylinder 204 away from the first support disk 203. The second cylinder 204 and the second support disk 206 are connected. A pull ring 205 is provided in the second cylinder 204, and the pull ring 205 and the second cylinder 204 are coaxially arranged. The pull ring 205 is located in the space enclosed by the first support disk 203, the second cylinder 204, the second support disk 206 and the bellows 207; one end of the connecting piece 208 passes through the bellows 207 and is connected to the pull ring 205, and the other end of the connecting piece 208 is connected to the repulsion mechanism.

[0045] The support tube 301 , the second cover plate 302 , the second support plate 206 , the first cover plate 201 , the first cylinder 202 and the second cylinder 204 form a second air chamber 3 , and the first air pressure monitoring gauge 4 is provided on the second support plate 206 .

[0046] The first cover plate 201 , the first cylinder 202 , the second cylinder 204 , the vacuum interrupter 1 and the bellows 207 form a first air chamber 2 , and the second air pressure detection gauge 5 is provided on the second cylinder 204 .

[0047] A vacuum interrupter 1 is provided within the first cylinder 202. The vacuum interrupter 1 is located within a cavity enclosed by the first cover plate 201, the first cylinder 202, and the first support plate 203. The vacuum interrupter 1 and the first cylinder 202 are coaxially arranged. The vacuum interrupter 1 is connected to the first cover plate 201 and the pull ring 205, respectively. Specifically, the vacuum interrupter 1 includes a static contact 101 and a moving contact 102. The vacuum interrupter 1 is provided with a first chamber 10. One end of the static contact 101 passes through the first cover plate 201 and extends into the second air chamber 3. The other end of the static contact 101 is located within the first chamber 10. One end of the moving contact 202 passes through the first support plate 203 and is connected to the pull ring 205. The other end of the moving contact 202 is located within the first chamber 10.

[0048] The first cover plate 201 , the first cylinder 202 , the first support disk 203 , the second support disk 206 and the bellows 207 are sequentially connected in series; and the second cover plate 302 , the support cylinder 301 and the second support disk 206 are sequentially connected in series.

[0049] In addition, the second support plate 206 extends laterally inside the end of the second cylinder 204 away from the first cylinder 204, and the second support plate 206 is disconnected inside the second cylinder 204, and the second support plate 206 passes through the cylinder wall of the second cylinder 204 and extends outward to connect with the support cylinder 301; the bellows 207 is provided at the end of the second cylinder 204 away from the first cylinder 202, and the bellows 207 extends to the position where the second support plate 206 is disconnected inside the second cylinder 204.

[0050] In this application, the first air chamber 2 should be as small as possible, and the volume of the first air chamber 2 can be reduced by thickening the wall thickness of the first cylinder 202 and / or the second cylinder 204. The smaller the volume of the first air chamber 2, the more obvious the pressure drop in the first air chamber 2 after the vacuum interrupter 1 leaks.

[0051] The vacuum degree detection device of the present application is suitable for online monitoring of the vacuum degree of the vacuum interrupter of the circuit breaker. The second air chamber 3 is used to surround the first air chamber 2, and the first air chamber 2 surrounds the vacuum interrupter 1. The first air pressure monitoring meter 4 tests the air pressure of the second air chamber 3, and the second air pressure monitoring meter 5 tests the air pressure of the first air chamber 2. That is, a dual-chamber structure design of the first air chamber 2 and the second air chamber 3 is adopted. The volume of the first air chamber 2 is equivalent to that of the first chamber 10 of the vacuum interrupter 1. When the vacuum interrupter 1 leaks, the air pressure of the first air chamber 2 drops significantly. By setting a leakage constant, the leakage of the vacuum interrupter 1 can be effectively detected, which can solve the problem of risk in online monitoring of the vacuum degree of the vacuum interrupter 1 of the circuit breaker.

[0052] The present application also provides a detection method based on the vacuum detection device, comprising the following steps:

[0053] Step 100: Assume the rated pressure of the second air chamber 3 is P 30 , the rated pressure of the first air chamber 2 is P 20 The pressure constants of the first air chamber 2 are P bj1 、P bj2 、P bj3 、P bs1 The pressure constants of the second air chamber 3 are P bj1 、P bj4 、P bs2 ;in,

[0054] P bj1 is the leakage alarm value between the second air chamber 3 and the first air chamber 2, P bj2 is the gas leakage alarm value of vacuum interrupter 1, P bj3 is the leakage alarm value of the first air chamber 2, P bs1 is the leakage blocking value of the first air chamber 2, P bj1 is the leakage alarm value between the second air chamber 3 and the first air chamber 2, P bj4is the leakage alarm value of the second air chamber 3, P bs2 is the leakage blocking value of the second air chamber 3; and

[0055] P 30 >P 20 , P 30 >P bj1 >P 20 , P 20 >P bj2 >P bj3 >P bs1 , P bj1 >P bj4 >P bs2 ;

[0056] Step 200: Detect the air pressure of the first air chamber 2 to be P2, and detect the air pressure of the second air chamber 3 to be P3.

[0057] When P2>P bj1 When P3=P2, the report “Gas leakage between the second and first chambers, waiting for power outage for maintenance” is given; that is, the gas pressure of the first chamber 2 is detected to be higher than P bj1 , and the air pressure of the second air chamber 3 is equal to the air pressure of the first air chamber 2, then the alarm "Gas leakage between the second air chamber and the first air chamber, waiting for power outage for maintenance";

[0058] When P2 <P bj2 When the pressure of the first gas chamber 2 is detected to be less than P bj2 , then it will report "vacuum interrupter is leaking, waiting for power outage for maintenance", and the leaking vacuum interrupter 1 will be closed. The vacuum interrupter 1 includes a static contact 101 and a moving contact 102, so that the static contact 101 and the moving contact 102 of the vacuum interrupter 1 are in contact with each other;

[0059] When P2 <P bj3 When the pressure in the first gas chamber 2 is detected to be less than P, the system will report "Gas leakage in the first gas chamber, please add gas, and wait for power outage for maintenance", and close the vacuum interrupter 1 in the leaking first gas chamber 2; that is, the pressure in the first gas chamber 2 is detected to be less than P bj3 , then it will report "Gas leakage in the first gas chamber, please replenish gas, wait for power outage for maintenance", and the vacuum interrupter 1 in the first gas chamber 2 will be closed, so that the static contact 101 and the moving contact 102 of the vacuum interrupter 1 are in contact with each other;

[0060] When P2 <P bs1 When the pressure of the first gas chamber 2 is detected to be less than P bs1, then the report "small gas chamber leakage, immediate power outage for maintenance" is given, and all vacuum interrupters 1 of the circuit breaker are closed so that the static contacts 101 and the moving contacts 102 of all vacuum interrupters 1 are in contact with each other;

[0061] When P3 <P bj4 When the pressure of the second air chamber 3 is detected to be less than P bj4 , then it will report “the second air chamber is leaking, please add air”;

[0062] When P3 <P bs2 When the pressure of the second air chamber 3 is detected to be less than P bs2 , then it will report "the second air chamber is leaking, immediately shut down the power for maintenance";

[0063] Also, when the power is turned off for maintenance, the vacuum degree of the vacuum interrupter 1 is tested.

[0064] In some embodiments, the rated air pressure P of the first air chamber 2 20 , rated air pressure P of the second air chamber 3 30 , Leakage alarm value P between the first air chamber 2 and the second air chamber 3 bj1 , Vacuum interrupter 1 leakage alarm value P bj2 , Leakage alarm value P of the first air chamber 2 bj3 , Leakage blocking value P of the first air chamber 2 bs1 , Leakage alarm value P of the second air chamber 3 bj4 , Leakage blocking value P of the second air chamber 3 bs2 , the specific value is determined according to the following method:

[0065] The rated pressure P2 of the first air chamber 2 is set with a large safety margin according to the insulation requirements of the components of the first air chamber structure;

[0066] Leakage blocking value P of the first gas chamber 2 bs1 , according to the insulation requirements of the components of the first air chamber structure, a smaller safety margin setting is reserved;

[0067] Leakage blocking value P of the second gas chamber 3 bs2 , according to the insulation requirements of the components of the second air chamber structure, a smaller safety margin setting is reserved;

[0068] Assume that the sensitivity of the first air pressure monitoring meter 4 and the second air pressure monitoring meter 5 is △P, P bj1 、P 20 、P bj2 、P bj3 、P bs1 The differences are all greater than △P, P 30 、P bj1 、Pbj4 、P bs2 The differences are all greater than △P.

[0069] According to the ideal gas state equation, for the same gas, when the gas volume changes, the product of gas pressure and gas volume remains unchanged, and the gas pressure is the absolute pressure;

[0070] Vacuum interrupter 1 gas leakage alarm value P bj2 The rated pressure P2 of the first air chamber 2 is in MPa, and the absolute pressure is equal to the absolute pressure plus 0.1 MPa. Before the vacuum interrupter 1 leaks, the volume of the first air chamber 2 is V2, and the absolute pressure is P 20 +0.1; After the vacuum interrupter 1 leaks, the volume of the first chamber 2 is V1+V2, and the absolute pressure of the first chamber 2 is P bj2 +0.1; the product of the volume of vacuum interrupter 1 before and after leakage and the absolute pressure is equal, that is:

[0071] (P 20 +0.1)*V2=(Pbj2+0.1)*(V1+V2);

[0072] Rated air pressure P of the first air chamber 2 20 , rated air pressure P of the second air chamber 3 30 , Leakage alarm value P between the second air chamber 3 and the first air chamber 2 bj1 The units are all MPa; before the air leaks between the second air chamber 3 and the first air chamber 2, the volume of the first air chamber 2 is V2, the absolute pressure is P2+0.1, the volume of the second air chamber 3 is V3, the absolute pressure is P 30 +0.1; After the air leaks between the second air chamber 3 and the first air chamber 2, the total volume of the second air chamber 3 and the first air chamber 2 is V2+V3, and the absolute pressure of the second air chamber 3 and the first air chamber 2 is P bj1 +1; the product of the volume and absolute pressure before and after the leakage between the second air chamber 3 and the first air chamber 2 is equal, that is:

[0073] (P 20 +0.1)*V2+(P 30 +0.1)*V3=(Pbj1+0.1)*(V2+V3).

[0074] In some embodiments, combined Figure 4 The vacuum degree test circuit diagram of the vacuum interrupter 1 is shown. When the power is off for maintenance, the vacuum degree test of the vacuum interrupter 1 includes the following steps:

[0075] Multiple vacuum interrupters 1 of the circuit breaker are connected in series. Each vacuum interrupter 1 includes a static contact 101 and a moving contact 102. A distance d is set between the static contact 101 and the moving contact 102 of a vacuum interrupter 1 to be tested, and the other vacuum interrupters 1 are closed.

[0076] Obtain a breakdown voltage value V0 of a vacuum interrupter 1. When the factory vacuum degree is intact, the breakdown voltage value of the distance d between the static contact 101 and the moving contact 102 of the vacuum interrupter 1 is V. The difference between V0 and V is △V. If △V is within a preset deviation range, the vacuum degree of the vacuum interrupter 1 is intact. If not, the vacuum interrupter 1 is leaking.

[0077] Among them, the other vacuum interrupter 1 is closed, that is, the static contact 101 and the moving contact 102 of the other vacuum interrupter 1 are in contact with each other; a voltage is applied between the incoming bushing 2001 and the outgoing bushing 2002 of the circuit breaker using the power supply 3001 to obtain a breakdown voltage value V0.

[0078] In this vacuum detection device's detection method, the rated air pressure of the second air chamber 3 is greater than that of the first air chamber 2, and the volume of the second air chamber 3 is much larger than that of the first air chamber 2. When air leaks between the second air chamber 3 and the first air chamber 2, the air pressure in the first air chamber 2 significantly exceeds the rated air pressure. By setting a set leakage value, air leaks between the first and second air chambers 2 and 3 can be effectively detected. This vacuum detection device's detection method does not require removing the vacuum interrupter 1 from the circuit breaker for testing, and is simple and reliable.

[0079] The present application also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the method are implemented when the processor executes the computer program.

[0080] The present application also provides a computer-readable storage medium having a computer program stored thereon, and the steps of the method are implemented when the computer program is executed by a processor.

[0081] The vacuum detection device, method, computer equipment and computer-readable storage medium of the present application include: a second air chamber structure, in which a second air chamber 3 is provided; a first air chamber structure, in which a first air chamber 2 is provided, in which the second air chamber 3 surrounds the first air chamber 2; a vacuum interrupter 1, in which the first air chamber 2 surrounds the vacuum interrupter 1; a first air pressure monitoring meter 4, in which the first air pressure monitoring meter 4 is connected to the second air chamber 3; and a second air pressure monitoring meter 5, in which the second air pressure monitoring meter 5 is connected to the first air chamber 2. The vacuum detection device adopts a dual-chamber structure design of the first air chamber 2 and the second air chamber 3. When the vacuum interrupter 1 leaks, the air pressure of the first air chamber 2 drops significantly. By setting a leakage constant, the leakage of the vacuum interrupter 1 can be effectively detected, which can solve the problem of the risk of online monitoring of the vacuum degree of the vacuum interrupter of the circuit breaker. The detection method of the vacuum detection device does not require the vacuum interrupter 1 to be removed from the circuit breaker for detection, and the method is simple and reliable.

[0082] The vacuum detection device, method, computer equipment and computer-readable storage medium provided in the embodiments of the present invention are introduced in detail above. Specific examples are used in the present invention to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum detection device, characterized in that: Used for online monitoring of vacuum degree of vacuum interrupter of circuit breaker, including: A second air chamber structure, wherein a second air chamber (3) is provided in the second air chamber structure, and the second air chamber structure comprises a support tube (301), a second cover plate (302) and a second support plate (206) respectively provided at both ends of the support tube (301); A first air chamber structure, the first air chamber structure being arranged in a supporting cylinder (301), a first air chamber (2) being arranged in the first air chamber structure, the second air chamber (3) surrounding the first air chamber (2), and the first air chamber structure comprising a first cylinder (202) and a second cylinder (204) arranged axially; A vacuum interrupter (1), wherein the first gas chamber (2) surrounds the vacuum interrupter (1), and the vacuum interrupter (1) and the first cylinder (202) are coaxially arranged; a first chamber (10) is provided in the vacuum interrupter (1); a first air pressure monitoring meter (4), the first air pressure monitoring meter (4) being connected to the second air chamber (3), and the first air pressure monitoring meter (4) being used to measure the air pressure in the second air chamber (3); a second air pressure monitoring meter (5), the second air pressure monitoring meter (5) being connected to the first air chamber (2), and the second air pressure monitoring meter (5) being used to measure the air pressure in the first air chamber (2); A dual-chamber structure design of a first air chamber (2) and a second air chamber (3) is adopted, the volume of the first air chamber (2) is comparable to the first cavity (10) of the vacuum interrupter (1), and when the vacuum interrupter (1) leaks, the air pressure of the first air chamber (2) drops significantly.

2. The vacuum degree detection device according to claim 1, characterized in that: A first support disk (203) is provided between the first cylinder (202) and the second cylinder (204); a first cover plate (201) is provided at one end of the first cylinder (202) away from the first support disk (203); a bellows (207) is provided at one end of the second cylinder (204) away from the first support disk (203); the second cylinder (204) and the second support disk (206) are connected; and a pull ring (205) is provided inside the second cylinder (204).

3. The vacuum degree detection device according to claim 2, characterized in that: The support cylinder (301), the second cover plate (302), the second support disk (206), the first cover plate (201), the first cylinder (202) and the second cylinder (204) enclose the second air chamber (3); The first cover plate (201), the first cylinder (202), the second cylinder (204), the vacuum interrupter (1) and the bellows (207) enclose the first air chamber (2); The vacuum interrupter (1) is located in a cavity enclosed by the first cover plate (201), the first cylinder (202) and the first support plate (203).

4. The vacuum degree detection device according to claim 3, characterized in that: The pull ring (205) and the second cylinder (204) are coaxially arranged, and the pull ring (205) is located in a space enclosed by the first support plate (203), the second cylinder (204), the second support plate (206) and the bellows (207).

5. The vacuum degree detection device according to claim 4, characterized in that: The first cover plate (201), the first cylinder (202), the first support plate (203), the second support plate (206) and the bellows (207) are sequentially connected in series; and The second cover plate (302), the support cylinder (301) and the second support disk (206) are sequentially connected in series.

6. The vacuum degree detection device according to claim 4, characterized in that: The vacuum interrupter (1) comprises a static contact (101) and a moving contact (102), one end of the static contact (101) passes through the first cover plate (201) and extends into the second air chamber (3), and the other end of the static contact (101) is located in the first chamber (10), one end of the moving contact (102) passes through the first support plate (203) and is connected to the pull ring (205), and the other end of the moving contact (102) is located in the first chamber (10).

7. The vacuum degree detection device according to claim 4, characterized in that: The first air chamber structure further comprises a connecting piece (208), one end of the connecting piece (208) passes through the bellows (207) and is connected to the pull ring (205), and the other end of the connecting piece (208) is connected to the repulsive mechanism.

8. A detection method based on the vacuum detection device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Assume that the rated pressure of the second air chamber (3) is P 30 , the rated pressure of the first air chamber (2) is P 20 , the pressure constants of the first air chamber (2) are Pb j1 , Pb j2 , Pb j3 、P bs1 , the pressure constants of the second air chamber (3) are P bj4 、P bs2 ; Among them, P bj1 is the air leakage alarm value between the second air chamber (3) and the first air chamber (2), P bj2 is the gas leakage alarm value of the vacuum interrupter (1), P bj3 is the leakage alarm value of the first air chamber (2), P bs1 is the leakage blocking value of the first air chamber (2), P bj4 is the leakage alarm value of the second air chamber (3), P bs2 is the leakage blocking value of the second air chamber (3); and, P 30 >P 20 , P 30 >P bj1 >P 20 , P 20 >P bj2 >P bj3 >P bs1 , P bj1 >P bj4 >P bs2 ; The air pressure of the first air chamber (2) is detected to be P2, and the air pressure of the second air chamber (3) is detected to be P3. When P2>P bj1 When P3=P2, it will report "Gas leakage between the second and first air chambers, waiting for power outage for maintenance"; when P2 <P bj2 When P2 <P bj3 When P2 <P bs1 When P3 <P bj4 When P3 <P bs2 When the power is turned off for maintenance, the vacuum degree of the vacuum interrupter (1) is tested.

9. The detection method of the vacuum detection device according to claim 8, characterized in that The sensitivity of the first air pressure monitoring meter (4) and the second air pressure monitoring meter (5) is △P, P bj1 、P 20 、P bj2 、P bj3 、P bs1 The differences are all greater than △P, P 30 、P bj1 、P bj4 、P bs2 The differences are all greater than △P; (P 20 +0.1)*V2=(P bj2 +0.1)*(V1+V2), (P 20 +0.1)*V2+(P 30 +0.1)*V3=(P bj1 +0.1)*(V2+V3), wherein V1 is the volume inside the vacuum interrupter (1), V2 is the volume of the first gas chamber (2), and V3 is the volume of the second gas chamber (3).

10. The detection method of the vacuum detection device according to claim 8, characterized in that: When the power is turned off for maintenance, the vacuum degree of the vacuum interrupter (1) is tested, which includes the following steps: A plurality of vacuum interrupter chambers (1) of a circuit breaker are connected in series, each vacuum interrupter chamber (1) comprising a static contact (101) and a moving contact (102), a distance d is left between the static contact (101) and the moving contact (102) of the vacuum interrupter chamber (1) to be tested, and the other vacuum interrupters (1) are closed; The breakdown voltage value V0 of the vacuum interrupter (1) is obtained. When the factory vacuum degree is intact, the breakdown voltage value of the distance d between the static contact (101) and the moving contact (102) of the vacuum interrupter (1) is V. The difference between V0 and V is ΔV. If ΔV is within a preset deviation range, the vacuum degree of the vacuum interrupter (1) is intact. If not, the vacuum interrupter (1) is leaking.

11. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to claim 8 are implemented.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 8 are implemented.

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