CN210863964U

CN210863964U - Multi-way joint with pressure adjusting mechanism

Info

Publication number: CN210863964U
Application number: CN201921457556.8U
Authority: CN
Inventors: 贺兵; 常敏; 廖海明; 王乐乐; 曾伟; 叶小伟
Original assignee: Shanghai Roye Electric Science and Technology Co Ltd
Current assignee: Shanghai Roye Electric Science and Technology Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-06-26
Anticipated expiration: 2029-09-04

Abstract

The utility model provides a many pass through and connect with pressure adjustment mechanism, connect the body and connect the pressure adjustment mechanism on many pass through and connect the body including many pass through, the inside of many pass through connects the body is equipped with first air passage, second air passage and the third air passage of mutual intercommunication, pressure adjustment mechanism's gas circuit with second air passage is linked together, pressure adjustment mechanism is configured to adjust gas pressure in first air passage, second air passage, the third air passage. The utility model discloses a lead to the joint more for the gas circuit of the gas density relay on the intercommunication high-tension electrical equipment has brought the convenience for the check-up of gas density relay, and sealed effectual, reliable, safety and convenience during the check-up.

Description

Multi-way joint with pressure adjusting mechanism

Technical Field

The utility model relates to an electric power tech field especially relates to an use on high-voltage electric equipment, have pressure adjustment mechanism lead to joint more.

Background

The gas density relay is used for monitoring and controlling the density of insulating gas in high-voltage and medium-voltage electrical equipment, a contact signal control loop is arranged in the gas density relay, a gas path of the gas density relay is communicated with a gas chamber of the high-voltage and medium-voltage electrical equipment, when gas leakage is detected, a contact of the gas density relay acts to generate a contact signal, and the contact signal control loop gives an alarm or locks according to the contact signal, so that the safe operation protection of the electrical equipment is realized.

At present, SF6 (sulfur hexafluoride) electrical equipment is widely applied to electric power departments and industrial and mining enterprises, and rapid development of the electric power industry is promoted. In recent years, with the rapid development of economy, the capacity of a power system in China is rapidly expanded, and the usage amount of SF6 electrical equipment is more and more. The SF6 gas plays a role in arc extinction and insulation in high-voltage electrical equipment, and the safe operation of the SF6 high-voltage electrical equipment is seriously influenced if the density of the SF6 gas in the high-voltage electrical equipment is reduced and the micro water content is exceeded: 1) the reduction of SF6 gas density to some extent will result in loss of insulation and arc extinguishing properties. 2) Under the participation of some metal substances, SF6 gas can generate hydrolysis reaction with water at the high temperature of more than 200 ℃ to generate active HF and SOF₂The insulation and metal parts are corroded and generate a large amount of heat, so that the pressure of the gas chamber is increased. 3) When the temperature is reduced, excessive moisture may form condensed water, so that the surface insulation strength of the insulation part is remarkably reduced, and even flashover occurs, thereby causing serious harm. Grid operating regulations therefore mandate that the density and moisture content of SF6 gas must be periodically checked both before and during operation of the equipment.

With the development of the unattended transformer substation towards networking and digitization and the continuous enhancement of the requirements on remote control and remote measurement, the online monitoring of the gas density and micro-water content state of the SF6 electrical equipment has important practical significance. With the continuous and vigorous development of the intelligent power grid in China, intelligent high-voltage electrical equipment is used as an important component and a key node of an intelligent substation, and plays a significant role in improving the safety of the intelligent power grid. At present, most of high-voltage electrical equipment is SF6 gas insulation equipment, and if the gas density is reduced (caused by leakage and the like), the electrical performance of the equipment is seriously influenced, and serious hidden danger is caused to safe operation. Currently, on-line monitoring of gas density values in SF6 high-voltage electrical equipment is very common, and existing gas density monitoring systems (devices) are basically: 1) The remote transmission type SF6 gas density relay is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. 2) The gas density transmitter is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. The SF6 gas density relay is the core and key component. However, because the environment for the field operation of the high-voltage transformer substation is severe, particularly the electromagnetic interference is very strong, in the currently used gas density monitoring system (device), the remote transmission type SF6 gas density relay is composed of a mechanical density relay and an electronic remote transmission part; in addition, the traditional mechanical density relay is reserved in a power grid system applying the gas density transmitter. The mechanical density relay is provided with one group, two groups or three groups of mechanical contacts, and when the pressure reaches the state of alarming, locking or overpressure, information is transmitted to a target equipment terminal in time through a contact connecting circuit, so that the safe operation of the equipment is ensured. Meanwhile, the monitoring system is also provided with a safe and reliable circuit transmission function, an effective platform is established for realizing real-time data remote data reading and information monitoring, and information such as pressure, temperature, density and the like can be transmitted to target equipment (such as a computer terminal) in time to realize online monitoring.

The gas density relay on the SF6 electrical equipment is regularly checked, which is a necessary measure for preventing the gas density relay from being in the bud and ensuring the safe and reliable operation of the SF6 electrical equipment; the 'electric power preventive test regulations' and the 'twenty-five key requirements for preventing serious accidents in electric power production' both require that the gas density relay be periodically checked. From the actual operation condition, the periodic verification of the gas density relay is one of the necessary means for ensuring the safe and reliable operation of the power equipment. Therefore, the calibration of the SF6 gas density relay is very important and popular in the power system, and various power supply companies, power plants and large-scale industrial and mining enterprises are implemented. And power supply companies, power plants and large-scale industrial and mining enterprises need to be equipped with testers, equipment vehicles and high-value SF6 gas for completing the field verification and detection work of the gas density relay. Including power failure and business loss during detection, the detection cost of each high-voltage switch station, which is allocated every year, is about tens of thousands to tens of thousands yuan. In addition, if the field check of the detection personnel is not standard in operation, potential safety hazards also exist. Therefore, it is necessary to innovate the existing gas density relay, so that the gas density relay for realizing the online gas density monitoring or the monitoring system formed by the gas density relay also has the checking function of the gas density relay, and further regular checking work of the (mechanical) gas density relay is completed, no maintainer is required to arrive at the site, the efficiency is greatly improved, and the cost is reduced. Meanwhile, the micro-water value in the gas chamber of the electrical equipment can be accurately measured in the online self-checking gas density relay or a monitoring system consisting of the gas density relay.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-voltage electrical equipment is used, have pressure adjustment mechanism's joint that leads to more for when solving the gas density to the electrical equipment of gas insulation or arc extinguishing and monitoring, still accomplish the online check-up to gas density relay, raise the efficiency, reduce the operation maintenance cost, guarantee electric wire netting safe operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a multi-way connector with a pressure adjustment mechanism, comprising:

the multi-way joint comprises a multi-way joint body, a first connecting piece, a second connecting piece and at least one third connecting piece, wherein the multi-way joint body comprises a first interface used for connecting electrical equipment, a second interface used for connecting a pressure adjusting mechanism and at least one third interface used for connecting a sensor instrument;

the pressure adjusting mechanism is connected with a second interface of the multi-way connector body, a gas path of the pressure adjusting mechanism is communicated with the second gas passage through the second interface, and the pressure adjusting mechanism is configured to adjust gas pressure in the first gas passage, the second gas passage and the third gas passage.

Preferably, the multi-way joint further comprises a self-sealing valve, and the self-sealing valve is communicated with the second air vent channel on an air path or communicated with the first air vent channel.

More preferably, the multi-way joint further comprises an air supplement port and/or a test port, and the air supplement port and/or the test port are/is arranged on the pressure adjusting mechanism; or the air supplementing port and/or the test port are/is arranged on the electrical equipment; or the air supplementing port and/or the test port are/is arranged on the multi-way joint body; alternatively, the air supply port and/or the test port are/is provided on the self-sealing valve.

Preferably, the multi-way joint further comprises a valve, wherein the valve is communicated with the first air channel and used for closing the air channel of the electrical equipment or closing the first air channel.

More preferably, the valve is embedded in the multi-way connector body.

More preferably, the valve is sealed within a chamber or housing.

More preferably, the valve and the pressure regulating mechanism are sealed within a single chamber or housing.

Preferably, the multi-way joint further comprises a connecting pipe, and the pressure adjusting mechanism is communicated with the second vent channel through the connecting pipe.

Preferably, the sensor meter comprises a micro water sensor, and/or a pressure sensor, and/or a temperature sensor.

Preferably, the multi-way joint body further comprises a fourth interface, the fourth interface is used for connecting a gas density relay, a fourth air passage is formed in the multi-way joint body corresponding to the fourth interface, and the fourth air passage is communicated with the first air passage, the second air passage and the third air passage.

More preferably, the first air duct is closed, the pressure regulating mechanism increases the pressure and increases the load, or the pressure regulating mechanism decreases the pressure and decreases the load, and the change speed of the load is not more than 10 per mill of the measuring range of the gas density relay per second (which may be separately specified according to specific requirements).

Preferably, the pressure adjusting mechanism is manually adjusted or automatically adjusted.

Preferably, the pressure adjusting mechanism is a closed air chamber, a heating element and/or a refrigerating element is arranged outside or inside the air chamber, and the temperature of the air in the air chamber is changed by heating the heating element and/or refrigerating through the refrigerating element, so that the pressure of the air is increased or decreased.

More preferably, the heating element, and/or the cooling element is a semiconductor.

More preferably, the pressure adjusting mechanism further comprises a heat insulating member, and the heat insulating member is arranged outside the air chamber.

Preferably, the pressure regulating mechanism is a cavity with an opening at one end, and the other end of the cavity is communicated with the second vent channel; the cavity is internally provided with a piston, one end of the piston is connected with an adjusting rod, the outer end of the adjusting rod is connected with a driving part, the other end of the piston extends into the opening and is in sealing contact with the inner wall of the cavity, and the driving part drives the adjusting rod and then drives the piston to move in the cavity.

Preferably, the pressure adjusting mechanism is a closed air chamber, a piston is arranged in the air chamber, the piston is in sealing contact with the inner wall of the air chamber, a driving component is arranged outside the air chamber, and the driving component pushes the piston to move in the air chamber through electromagnetic force.

Preferably, the pressure adjustment mechanism is an air bag having one end connected to a driving member, and the air bag is driven by the driving member to generate a volume change.

Preferably, the pressure adjusting mechanism is a corrugated pipe, one end of the corrugated pipe is communicated with the second vent passage, and the other end of the corrugated pipe stretches under the driving of the driving part.

The driving component of the pressure adjusting mechanism includes, but is not limited to, one of a magnetic force, a motor (variable frequency motor or stepping motor), a reciprocating mechanism, a carnot cycle mechanism, and a pneumatic element.

Preferably, the pressure regulating mechanism is a release valve, and the release valve is arranged in a closed air chamber or is connected with the closed air chamber.

More preferably, the pressure regulating mechanism further comprises a flow valve controlling the gas release flow rate.

More preferably, the air release valve is an electromagnetic valve or an electric valve, or other air release valves realized by electric or pneumatic means.

Preferably, the pressure regulating mechanism is a compressor.

Preferably, the pressure regulating mechanism is a pump.

More preferably, the pump includes, but is not limited to, a pressurizing pump, an electric air pump, or an electromagnetic air pump.

Preferably, the pressure regulating mechanism is sealed within a chamber or housing.

Preferably, the pressure adjusting mechanism further comprises a capillary tube, the capillary tube is arranged between the pressure adjusting mechanism and the air path of the second interface of the multi-way connector body, and the pressure adjusting mechanism is communicated with the multi-way connector body on the air path through the capillary tube.

Compared with the prior art, the technical scheme of the utility model following beneficial effect has:

the utility model provides a many pass through and connect with pressure adjustment mechanism, connect the body and connect the pressure adjustment mechanism on many pass through and connect the body including many pass through, the inside of many pass through and connect the body is equipped with first air passage, second air passage and the third air passage of mutual intercommunication, pressure adjustment mechanism's gas circuit with second air passage is linked together. The utility model discloses a lead to the joint more for the gas circuit of the gas density relay on the intercommunication high-tension electrical equipment has brought the convenience for the check-up of gas density relay, and sealed effectual, reliable, safety and convenience during the check-up.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 is a schematic structural view of a multi-way joint according to a first embodiment;

FIG. 2 is a schematic structural diagram (connecting gas density relay) of a multi-way joint in a checking state according to the second embodiment;

FIG. 3 is a schematic structural view of a multi-way joint according to a third embodiment;

FIG. 4 is a schematic view of a multi-way joint according to a fourth embodiment;

FIG. 5 is a schematic view of a multi-way joint of the fifth embodiment;

FIG. 6 is a schematic view of a manifold according to the sixth embodiment;

FIG. 7 is a schematic view of a multi-way joint according to the seventh embodiment;

FIG. 8 is a schematic view of a manifold according to the eighth embodiment;

FIG. 9 is a schematic structural view of a multi-way joint according to the ninth embodiment.

Detailed Description

The utility model provides a lead to and connect more with pressure adjustment mechanism, for making the utility model discloses a purpose, technical scheme and effect are clearer, make clear and definite, and it is right that the following refers to the drawing and lifts the example the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, it being understood that the data so used may be interchanged under appropriate circumstances. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such system, article, or apparatus.

The first embodiment is as follows:

fig. 1 is a schematic structural diagram of a multi-way joint with a pressure adjusting mechanism, which comprises a multi-way joint body 9 and the pressure adjusting mechanism 5. Wherein:

the multi-way joint comprises a multi-way joint body 9 and a pressure regulating mechanism, wherein the multi-way joint body 9 comprises a first interface used for connecting electrical equipment, a second interface used for connecting the pressure regulating mechanism and at least one third interface used for connecting a sensor instrument, and a first air channel, a second air channel and a third air channel which are communicated with each other are arranged in the multi-way joint body 9 corresponding to the first interface, the second interface and the third interface;

the pressure adjusting mechanism 5 is connected with a second interface of the multi-way joint body 8, an air passage of the pressure adjusting mechanism 5 is communicated with the second air passage through the second interface, and the pressure adjusting mechanism 5 is configured to adjust the air pressure in the first air passage, the second air passage and the third air passage.

In a preferred embodiment, the multi-way joint body 9 further includes a fourth interface, the fourth interface is used for connecting a gas density relay, a fourth air passage is formed in the multi-way joint body 9 corresponding to the fourth interface, and the fourth air passage is communicated with the first air passage, the second air passage and the third air passage.

Example two:

FIG. 2 is a schematic view of a multi-way joint with a pressure adjustment mechanism in a verified state.

As shown in FIG. 2, the multi-way joint of this embodiment adds a valve 4 and a gas patch port 10 (or test port) to the embodiment. The valve 4 is communicated with the first air passage and used for closing the air passage of the electrical equipment 8 or sealing the first air passage, and the valve 4 can also be embedded in the multi-way joint body 9. The air supplementing port 10 is arranged on the multi-way joint body 9.

The pressure adjustment mechanism 5 of this embodiment is one end open-ended cavity, there is piston 51 (piston 51 is equipped with sealing washer 510) in the cavity, piston 51's one end is connected with an adjusting lever, drive unit 52 is connected to the outer end of adjusting lever, piston 51's the other end stretches into in the opening, and with the inner wall of cavity contacts, drive unit 52 drive adjust the pole and then drive piston 51 is in the intracavity removes. The driving member 52 includes, but is not limited to, one of a magnetic force, a motor (variable frequency motor or step motor), a reciprocating mechanism, a carnot cycle mechanism, and a pneumatic element.

In a preferred embodiment, the multi-way joint further comprises a connecting pipe, and the pressure adjusting mechanism 5 is communicated with the second air vent channel through the connecting pipe.

In a checking state, a first interface of the multi-way joint body 9 is connected with one end of the valve 4, and the other end of the valve 4 is connected to the electrical equipment 8 in a sealing mode; a second interface of the multi-way joint body 9 is communicated with the pressure regulating mechanism 5; a third interface of the multi-way joint body 9 is connected with the pressure sensor 2; the fourth interface of the multi-way joint body 9 is connected with the gas density relay 1.

The working principle of the embodiment is as follows:

when the gas density relay 1 needs to be checked, the valve 4 is closed, so that the gas density relay 1 is isolated from the electrical equipment 8 on the gas path, and then the gas density relay 1 is adjusted to a checking state. The driving part 52 pushes the piston 51 to move in the cavity under the control of a control mechanism, so that the volume of a sealed cavity consisting of the piston 51, the gas density relay 1, the valve 4 and the like is changed, the pressure of the gas is changed, the gas density relay 1 generates an alarm and/or locking contact signal action, the contact signal action is sampled and then transmitted to a processing unit, and the processing unit detects the alarm and/or locking contact action value and/or return value of the gas density relay 1 according to the gas density value during the contact signal (alarm and/or locking) action, so that the verification work of the gas density relay 1 is completed.

Wherein, in the closed state of the valve 4 (or the first passage closed state), the pressure adjusting mechanism 5 can slowly increase the load at the time of pressure increase or can slowly decrease the load at the time of pressure decrease. The load change speed is not more than 10 per second of the measuring range of the gas density relay 1, namely the pressure of the pressure adjusting mechanism 5 can be adjusted (steadily increased or decreased).

Example three:

as shown in fig. 3, the present embodiment is different from the first embodiment in that:

1) the multi-way connector further comprises a valve 4, the valve 4 is communicated with the first air channel and used for closing an air channel of the electrical equipment or closing the first air channel, and of course, the valve 4 can also be embedded in the multi-way connector body 9.

2) The multi-way joint further comprises a self-sealing valve 11. One end of the self-sealing valve 11 is connected to the electrical equipment in a sealing manner, and the other end of the self-sealing valve 11 is communicated with one end of the valve 4, namely, the self-sealing valve 11 is communicated with the first air passage on an air path.

3) The multi-way joint further comprises an air supplement port 10 (or a test port), wherein the air supplement port 10 is arranged on the multi-way joint body 9, and of course, the air supplement port 10 can also be arranged on the self-sealing valve 11.

4) The pressure adjusting mechanism 5 is an air bag 53, and the driving part 52 is used for driving the air bag 53 to perform air suction or inflation operation, so that the volume of the air changes, and the pressure rise and fall are completed.

Example four:

as shown in fig. 4, the present embodiment is different from the third embodiment in that: the pressure adjusting mechanism 5 is composed of a corrugated pipe 54 and a driving part 52, and an air chamber 57 inside the corrugated pipe 54 is communicated with the second vent channel to form a reliable sealed cavity. The driving part 52 drives the corrugated pipe 54 to stretch and contract, and the volume of the sealed cavity changes accordingly, so that the pressure is lifted and lowered.

Example five:

as shown in fig. 5, the present embodiment is different from the third embodiment in that:

the pressure adjusting mechanism 5 includes a vent (not shown), an air chamber 57, a heating element 58 (which may also be a cooling element), and a temperature control unit (not shown). A vent hole is formed in the air chamber 57, and the air chamber 57 is communicated with the second vent channel through the vent hole; the heating element 58 is provided outside (or inside) the gas chamber 57; the temperature control unit is electrically connected to the heating element 58, and is configured to control the heating element 58 to heat (or control the refrigeration element to refrigerate), so that the temperature of the gas in the sealed gas chamber 57 changes, and the pressure rise and fall are completed.

The working principle of the embodiment is as follows:

when the gas density relay 1 needs to be checked, the temperature control unit controls the heating element 58 of the pressure adjusting mechanism 5 to heat, and when the temperature reaches a preset value, the valve 4 is closed, so that the gas density relay 1 is isolated from the electrical equipment on a gas path; then, the heating element 58 is immediately turned off, the heating of the heating element 58 is stopped, the temperature of the gas in the gas chamber 57 of the pressure adjusting mechanism 5 is changed, the pressure of the gas is gradually reduced, so that the gas density relay 1 generates an alarm and/or a locking contact signal action, the contact signal action is sampled and then transmitted to a processing unit, and the processing unit detects the alarm and/or locking contact action value and/or return value of the gas density relay 1 according to the gas density value during the contact signal (alarm and/or locking) action, thereby completing the verification work of the gas density relay 1.

Example six:

as shown in fig. 6, the present embodiment is different from the third embodiment in that:

the pressure adjusting mechanism 5 is a closed air chamber, a piston 51 (the piston 51 is provided with a sealing ring 510) is arranged in the air chamber, the piston 51 is in sealing contact with the inner wall of the air chamber, a driving part 52 is arranged outside the air chamber, and the driving part 52 pushes the piston 51 to move in the air chamber through electromagnetic force, so that the volume of the air chamber is changed, and then the pressure is lifted.

Example seven:

as shown in fig. 7, the present embodiment is different from the first embodiment in that:

2) The multi-way joint further comprises an air supplement port 9 (or a test port), and the air supplement port 10 is arranged on the pressure adjusting mechanism 5.

3) The pressure adjustment mechanism 5 is provided in a housing 55.

Example eight:

as shown in fig. 8, the present embodiment is different from the first embodiment in that:

1) the multi-way connector further comprises a valve 4, and the valve 4 is communicated with the first air channel and used for closing an air channel of the electrical equipment. The valve 4 is sealed in the first shell 41, and the control cable of the valve 4 is led out through the first lead-out wire sealing member 42 sealed with the first shell 41, so that the valve 4 is ensured to keep sealed and can work reliably for a long time. The pressure adjusting mechanism 5 is sealed in the second shell 55, and a control cable of the pressure adjusting mechanism 5 is led out through a second outgoing line sealing part 56 sealed with the second shell 55, so that the pressure adjusting mechanism 5 is ensured to keep sealed and can work reliably for a long time. The second casing 55 and the first casing 41 may be integrated into one body.

2) The multi-way joint further comprises a micro-water sensor 13 for monitoring the micro-water content of the electrical device. The micro water sensor 13 is arranged on a third interface of the multi-way joint body 9. Specifically, the pressure of the pressure adjusting mechanism 5 is adjusted to rise and fall, so that a gas circulation function is achieved, gas between the interior of the electrical equipment and the micro water sensor 13 is promoted to flow, and the micro water content of the gas in the interior of the electrical equipment is detected.

Example nine:

as shown in fig. 9, the present embodiment is different from the first embodiment in that:

2) The multi-way joint further comprises an air supplement port 10 (or a test port), and the air supplement port 10 is arranged on the multi-way joint body 9.

4) The pressure adjusting mechanism 5 mainly comprises an electromagnetic valve and a second housing 55. The pressure regulating mechanism 5 is controlled to open the electromagnetic valve, pressure change occurs, and then pressure lifting is completed.

To sum up, the utility model provides a many lead to connect with pressure adjustment mechanism, connect the body and connect the pressure adjustment mechanism on many lead to connect the body including many lead to, many lead to the inside of connecting the body and be equipped with first air passage, second air passage and the third air passage that communicate each other, pressure adjustment mechanism's gas circuit with second air passage is linked together. The utility model discloses a lead to the joint more for the gas circuit of the gas density relay on the intercommunication high-tension electrical equipment has brought the convenience for the check-up of gas density relay, and sealed effectual, reliable, safety and convenience during the check-up.

The present invention has been described in detail with reference to the specific embodiments, but the present invention is only by way of example and is not limited to the specific embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are intended to be within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.

Claims

1. The utility model provides a lead to and connect with many with pressure adjustment mechanism which characterized in that includes:

2. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the multi-way joint further comprises a self-sealing valve, and the self-sealing valve is communicated with the second air channel or the first air channel on an air channel.

3. The multi-way joint with a pressure adjustment mechanism of claim 2, wherein: the multi-way joint further comprises an air supplementing port and/or a test port, and the air supplementing port and/or the test port are/is arranged on the pressure adjusting mechanism; or the air supplementing port and/or the test port are/is arranged on the electrical equipment; or the air supplementing port and/or the test port are/is arranged on the multi-way joint body; alternatively, the air supply port and/or the test port are/is provided on the self-sealing valve.

4. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the multi-way connector further comprises a valve, and the valve is communicated with the first air channel and used for closing an air channel of the electrical equipment or closing the first air channel.

5. The multi-way joint with a pressure adjustment mechanism of claim 4, wherein: the valve is embedded in the multi-way joint body.

6. The multi-way joint with a pressure adjustment mechanism of claim 4, wherein: the valve is sealed in a cavity or a shell; or,

the valve and the pressure regulating mechanism are sealed within a chamber or housing.

7. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the multi-way joint further comprises a connecting pipe, and the pressure adjusting mechanism is communicated with the second air passage through the connecting pipe.

8. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the sensor meter comprises a micro-water sensor, and/or a pressure sensor, and/or a temperature sensor.

9. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the multi-way joint body further comprises a fourth interface, the fourth interface is used for being connected with a gas density relay, a fourth air passage is formed in the multi-way joint body corresponding to the fourth interface, and the fourth air passage is communicated with the first air passage, the second air passage and the third air passage.

10. The multi-way joint with a pressure adjustment mechanism of claim 9, wherein: the first air passage is closed, the pressure regulating mechanism boosts pressure and increases load, or the pressure regulating mechanism reduces pressure and decreases load, and the change speed of the load is not more than 10 per mill of the measuring range of the gas density relay per second.

11. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the pressure adjusting mechanism is manually adjusted or automatically adjusted.

12. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the pressure adjusting mechanism is a closed air chamber, a heating element and/or a refrigerating element are arranged outside or inside the air chamber, and the temperature of the air in the air chamber is changed by heating the heating element and/or refrigerating through the refrigerating element, so that the lifting of the air pressure is completed.

13. The multi-way joint with a pressure adjustment mechanism of claim 12, wherein: the heating element, and/or the cooling element is a semiconductor.

14. The multi-way joint with a pressure adjustment mechanism of claim 12, wherein: the pressure adjusting mechanism further comprises a heat insulation piece, and the heat insulation piece is arranged outside the air chamber.

15. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the pressure adjusting mechanism is a cavity with one end open, and the other end of the cavity is communicated with the second vent channel; a piston is arranged in the cavity, one end of the piston is connected with an adjusting rod, the outer end of the adjusting rod is connected with a driving part, the other end of the piston extends into the opening and is in sealing contact with the inner wall of the cavity, and the driving part drives the adjusting rod to further drive the piston to move in the cavity; or,

the pressure adjusting mechanism is a closed air chamber, a piston is arranged in the air chamber and is in sealing contact with the inner wall of the air chamber, a driving part is arranged outside the air chamber, and the driving part pushes the piston to move in the air chamber through electromagnetic force; or,

the pressure adjusting mechanism is an air bag with one end connected with a driving part, and volume change is generated by the air bag under the driving of the driving part; or,

the pressure adjusting mechanism is a corrugated pipe, one end of the corrugated pipe is communicated with the second vent passage, and the other end of the corrugated pipe stretches under the driving of the driving part;

wherein, the driving part comprises one of a magnetic force, a motor, a reciprocating mechanism, a Carnot cycle mechanism and a pneumatic element.

16. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the pressure adjusting mechanism is a deflation valve which is arranged in a closed air chamber or is connected with the closed air chamber; the air release valve is an electromagnetic valve or an electric valve.

17. The multi-way joint with a pressure adjustment mechanism of claim 16, wherein: the pressure regulating mechanism also includes a flow valve that controls the gas release flow.

18. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the pressure regulating mechanism is a compressor.

19. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the pressure regulating mechanism is a pump, and the pump comprises a pressure generating pump, a booster pump, an electric air pump or an electromagnetic air pump.

20. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the pressure regulating mechanism is sealed in a cavity or a shell.

21. The multi-way joint with a pressure adjustment mechanism of claim 1, wherein: the pressure adjusting mechanism further comprises a capillary tube, the capillary tube is arranged between the pressure adjusting mechanism and the air path of the second interface of the multi-way connector body, and the pressure adjusting mechanism is communicated with the multi-way connector body on the air path through the capillary tube.