CN104299846A - Wireless remote transmission type sulfur hexafluoride gas density relay - Google Patents

Abstract

The invention relates to a wireless remote transmission type sulfur hexafluoride gas density relay, which can be applied to sulfur hexafluoride electrical equipment. It includes a housing (8), on which a terminal block (15) and a joint (9) are respectively fixedly installed on the outer side of the housing (8), and a base (5) is fixedly installed in the housing (8). Yes: it also includes a Bourdon tube (3), one end of the Bourdon tube (3) is fixed on the base (5) and the other end is connected to one end of the temperature compensation sheet (4), the temperature compensation sheet ( 4) The other end is connected to the input end of the displacement reduction mechanism (7) through a connecting piece, the output end of the displacement reduction mechanism (7) is connected to the pointer (2), and a scale is fixedly installed on the base (5) disc (1). The invention provides a sulfur hexafluoride gas density relay with high precision, good electrical performance of the signal generator, good contact contact, and the function of density wireless remote transmission.

Description

A wireless remote transmission type sulfur hexafluoride gas density relay

technical field

The invention relates to a wireless remote transmission type sulfur hexafluoride gas density relay, which can be applied to sulfur hexafluoride electrical equipment.

Background technique

Sulfur hexafluoride electrical products have been widely used in the power sector, industrial and mining enterprises, and promoted the rapid development of the power industry. Ensuring the reliable and safe operation of sulfur hexafluoride electrical products has become one of the important tasks of the power sector. The arc extinguishing medium and insulating medium of sulfur hexafluoride electrical products are sulfur hexafluoride gas, and no gas leakage can occur. If gas leakage occurs, the reliable and safe operation of sulfur hexafluoride electrical products cannot be guaranteed. Therefore, it is very necessary to monitor the sulfur hexafluoride density value of sulfur hexafluoride electrical products. At present, a mechanical pointer-type sulfur hexafluoride gas density relay (see Figure 1) is generally used to monitor the density of sulfur hexafluoride gas, that is, when a sulfur hexafluoride electrical product leaks The relay can alarm and lock when the air is too high, and it can also display the density value on site at the same time. The density relay generally adopts a dial, a pointer, a single Baden tube, a single temperature compensation sheet, a base, a movement and a hairspring type magnetic auxiliary electric contact. When the contacts (alarm or latch) are closed, the closing force only depends on the tiny force of the contact hairspring, even if the force of the magnetic assist type is added, it is still very small, so it is extremely afraid of vibration, and the contact closure is not reliable enough. And the most important thing is that when it is oxidized or polluted, the phenomenon of poor contact of electric contacts often occurs, causing serious consequences. In addition, it is particularly emphasized that the breaking speed of the magnetic-assisted electric contact is relatively slow, and the contact capacity is small, resulting in a short service life. Therefore, it is difficult to guarantee the electrical performance and life of the density relay. Once a problem occurs, the user has to replace it again, causing economic losses and failing to meet the requirements.

At the same time, the most important thing is that the mechanical SF6 gas density relay currently used to monitor the SF6 gas density also has the following outstanding defects: 1) when the SF6 electrical product leaks, only when its gas When the pressure drops to the alarm value, the alarm signal is sent out, and at this time the SF6 gas has leaked a lot. For example, SF6 electrical equipment with a rated pressure of 0.6Mpa generally adopts a density relay with an alarm pressure of 0.52Mpa and a blocking pressure of 0.50Mpa. Now many substations are unattended substations, so for this kind of SF6 electrical equipment, if there is a gas leak, when the gas drops from the rated pressure of 0.6Mpa to the alarm pressure of 0.52Mpa, the on-duty personnel will find out and notify the maintenance personnel Go to the scene to deal with the leakage accident, and at this time the SF6 gas has leaked a lot. Therefore, in unattended substations, it is very necessary to monitor the density of SF6 electrical equipment online, and to detect the gas leakage of SF6 electrical equipment in time. 2) The contact of the density relay generally adopts the hairspring type magnetic assist type electric contact. When its contacts are closed, its closing force is very small, and the contact closure is not firm enough. And the most important thing is that when it is oxidized or polluted, the phenomenon of poor contact of electrical contacts often occurs, resulting in failure and serious consequences.

Therefore, improvement and innovation are urgently needed, and a remote transmission type sulfur hexafluoride gas density relay with good contact electrical performance, stable contact contact and good shock resistance is created. In order to ensure the reliable operation of SF6 electrical equipment, improve the continuous and reliable operation capability of the power system, and realize online state detection, monitoring and fault prediction of its performance, it has become an important research direction in the application of SF6 electrical equipment. With the requirements of remote control and telemetry in unattended substations, online monitoring of the SF6 gas density value of SF6 electrical equipment has very important practical significance. In addition, with the development of unattended substations towards networking and digitalization and the increasing requirements for remote control and telemetry, online monitoring of SF6 gas density in SF6 electrical equipment is also of great practical significance. At the same time, it is very difficult to re-arrange the signal transmission lines in the running substation. First, due to the live operation of the equipment, the arrangement of signal transmission lines is not allowed, which involves personal safety issues, and power outages are generally not allowed, and the time is very short. limited, so it is difficult to rearrange signal transmission lines. Second, because the signal transmission line is re-arranged on site, it is time-consuming and laborious work for the operators. So need to use wireless transmission signal.

To sum up, the electrical performance of the current sulfur hexafluoride gas density relay is not good enough, or the contact contact is not stable enough, and the remote transmission function of the density value cannot be realized, and it is difficult to realize the online monitoring of the SF6 gas density of the SF6 electrical equipment, so There is an urgent need to innovate a density relay with good electrical performance, reliable contact contact, good shock resistance, and at the same time realize the function of density wireless remote transmission.

Contents of the invention

The purpose of the present invention is to provide a wireless remote transmission sulfur hexafluoride gas density relay with high precision, shock absorption function, good electrical performance of the signal generator and good contact contact.

A wireless remote transmission type sulfur hexafluoride gas density relay, comprising a housing, on the outside of the housing, a terminal block and a connector are respectively fixedly installed, and a base is fixedly installed in the housing, and its special features are: It includes a Bourdon tube, one end of the Bourdon tube is fixed on the base and the other end is connected to one end of the temperature compensation sheet, the other end of the temperature compensation sheet is connected to the input end of the displacement reduction mechanism through a connecting piece, the The output end of the displacement reduction mechanism is connected with the pointer, and a scale plate is also fixedly installed on the base.

Among them, the Bourdon tube adopts C-type Bourdon tube, and the connecting piece adopts connecting rod.

Wherein the joint communicates with the temperature sensor and the pressure sensor on the base through the pipeline.

The output ends of the temperature sensor and the pressure sensor are connected to the miniature wireless data transmission station successively through the amplifier circuit, the single chip microcomputer and the data collector, and the miniature wireless data transmission station is also connected to the antenna outside the casing.

Wherein, a watch glass is installed on the casing through a sealing ring, and a cover case is also installed on the watch glass.

Among them, the displacement reduction mechanism adopts a fan-shaped curved surface transmission mechanism, which specifically includes an upper splint and a lower splint. Between the upper splint and the lower splint, a sector-shaped curved surface gear and a central gear are respectively installed through a rotating shaft. The sector-shaped curved surface gear acts as a displacement reduction mechanism. The input end of the mechanism, and the rotating shaft of the sun gear is used as the output end of the displacement reduction mechanism.

The radius of the sector gear is smaller than that of the sun gear.

Wherein, a signal generator is also provided in the housing, and the signal generator includes at least one micro switch fixed on the base, and a signal adjustment mechanism cooperating with the micro switch is installed on the rotating shaft of the sun gear, so that When the rotating shaft of the central gear rotates to a certain angle, the micro-switches are triggered, and all the micro-switches are connected with the wire sockets.

Wherein the signal adjusting mechanism is specifically an eccentric wheel installed on the rotating shaft of the central gear with the number equal to that of the micro-switches.

In order to solve the above-mentioned problems in the prior art, the present invention provides a sulfur hexafluoride gas density relay with high precision, good electrical performance of the signal generator, good contact contact, and simultaneously realizes the function of density wireless remote transmission, which is used for Control and monitor the density of sulfur hexafluoride gas in the sealed container, and send out alarm signals and blocking signals in time for the gas leakage in sulfur hexafluoride electrical equipment, and realize online monitoring of the SF6 gas density of SF6 electrical equipment , Play a role in ensuring power safety.

Compared with the existing technology, it also has the following obvious advantages and characteristics: because pressure sensors and temperature sensors are also used, pressure and temperature signals are collected through pressure sensors and temperature sensors, and converted into density values through single-chip processing, and digital collectors. The data from the single chip microcomputer is buffered and then sent to the micro wireless data transmission station. After receiving the data, the micro-digital transmission station modulates it into a radio frequency signal and radiates it into the air to realize long-distance transmission, thereby realizing online monitoring of the density of sulfur hexafluoride gas electrical equipment. And the displacement of the Bourdon tube and the temperature compensation plate is reduced by the displacement reduction mechanism, and then the signal generator (several micro switches) is controlled to achieve the purpose of shock absorption. The displacement shrinking mechanism controls the micro-switch according to the gas density value, so that the micro-switch sends a corresponding signal to complete the function of the density relay, thereby overcoming the problem of low anti-vibration performance in the prior art and ensuring good electrical performance of the density relay , good contact contact, long working life and other advantages ensure the reliable operation of the system, and can be well applied to sulfur hexafluoride electrical equipment.

Description of drawings

Fig. 1 is the structural representation of pointer type sulfur hexafluoride gas density relay in the background technology;

Fig. 2 is the structural representation of gas density relay of the present invention;

Fig. 3 is the local structure schematic diagram of gas density relay of the present invention;

Fig. 4 is a schematic structural view of the displacement reduction mechanism 7 in the gas density relay of the present invention;

Fig. 5 is a schematic circuit diagram of the gas density relay of the present invention.

Detailed ways

As shown in Figures 2, 3, 4, and 5, the present invention provides a wireless remote transmission type sulfur hexafluoride gas density relay, which includes a housing 8, on which a terminal block 15 and The joint 9 is fixedly installed with the base 5 in the housing 8, and also includes a Bourdon tube 3, one end of the Bourdon tube 3 is fixed on the base 5 and the other end thereof is connected to one end of the temperature compensating sheet 4 , the other end of the temperature compensation sheet 4 is connected to the input end of the displacement reduction mechanism 7 through a connector, and the output end of the displacement reduction mechanism 7 is connected to the pointer 2 , and the dial 1 is also fixedly installed on the base 5 .

Wherein the Bourdon tube 3 is a C-type Bourdon tube, and the connecting piece is a connecting rod 6 . Wherein (sulfur hexafluoride gas) joint 9 communicates with the temperature sensor 20 on the base 5 through pipelines (pressure sensor 21 is in direct contact with sulfur hexafluoride gas, temperature sensor 20 and sulfur hexafluoride gas can directly contact or can not direct contact). Wherein the output ends of the temperature sensor 20 and the pressure sensor 21 are connected with the miniature wireless data transmission station successively through the amplifier circuit, the single-chip microcomputer 23, the data (word) collector, and the miniature wireless data transmission station is also connected with the antenna 261 outside the housing 8, Specifically, the connection can be made through the wire socket 15 . Wherein, a watch glass 17 is installed on the casing 8 through a sealing ring, and a cover case 16 is also installed on the watch glass 17 .

Further, wherein the displacement reduction mechanism 7 adopts a fan-shaped curved surface transmission mechanism, which specifically includes an upper clamping plate 75 and a lower clamping plate, and a sector-shaped curved surface gear 71 and a central gear 73 that are engaged with each other are respectively installed through a rotating shaft between the upper clamping plate 75 and the lower clamping plate , the curved sector gear 71 serves as the input end of the displacement reduction mechanism 7 , and the rotating shaft of the central gear 73 serves as the output end of the displacement reduction mechanism 7 . Wherein the radius of the sector gear 71 is smaller than the radius of the sun gear 73 .

Also be provided with signal generator in described housing 8 in addition, this signal generator comprises at least one (such as 3) microswitches 10 that are fixed on the base 5, and on the rotating shaft of sun gear 73, be installed with this The signal adjustment mechanism 11 that the microswitch 10 cooperates can trigger the microswitch 10 when the rotating shaft of the central gear 73 rotates to a certain angle (taking 3 microswitches 10 as an example, it can be triggered simultaneously, or the three switches can be triggered simultaneously. The trigger amounts are different to represent three different gas pressure conditions respectively), and all the microswitches 10 are connected with the terminal block 15 in addition. Wherein the signal adjustment mechanism 11 is specifically a plurality of eccentric wheels installed on the rotating shaft of the sun gear 73 equal to the number of micro switches 10 .

In order to better understand the technical solution of the present invention, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings:

Example 1:

Please refer to Figures 2, 3, 4 and 5, the present invention is a wireless remote transmission sulfur hexafluoride gas density relay, including a Bourdon tube 3, a temperature compensation sheet 4, a base 5, a connecting rod 6, and a displacement reduction mechanism 7. Shell 8, joint 9, micro switch 10, signal adjustment mechanism 11, connecting arm 13, pipe riser 14, wiring seat 15, watch glass 17, cover 16, temperature sensor 20, pressure sensor 21, amplifying circuit, Single-chip microcomputer, power module, digital-to-analog converter, voltage-to-current converter, current constant current device, printed (circuit) board 28, electric wire 12 and switch strengthening mechanism, present embodiment uses three microswitches 10 as gas density relay signal generation The gas density relay also has a dial 1 and a pointer 2 for displaying the value. Wherein, the temperature sensor 20 is sealed and fixed on the right side of the base 5, and the temperature sensor 20 is in contact with the sulfur hexafluoride gas, so that the temperature value of the sulfur hexafluoride gas can be accurately measured. The pressure sensor 21 is sealed and fixed on the back of the base 5, and the amplifying circuit, single-chip microcomputer, power supply module, digital-to-analog converter, voltage-to-current converter, and current constant current device are fixed on the printed (circuit) board, and the printed board 28 Located behind the base 5 and behind the housing 8 , the amplifying circuit, single-chip microcomputer, power supply module, digital-to-analog converter, voltage-to-current converter, and current constant current regulator are located around the pressure sensor 21 .

The working principle or steps of the wireless remote transmission type sulfur hexafluoride gas density relay of the present invention are as follows: the pressure and temperature are measured by the pressure sensor 21 and the temperature sensor 20, and the signals of the measured pressure and temperature are amplified by the amplifying circuit 22 , the amplified pressure and temperature signals are collected by the single-chip microcomputer 23, and the sulfur hexafluoride gas density _P20 is obtained through the internal calculation of the single-chip microcomputer 23, and then the data _P20 transmitted by the single-chip microcomputer 23 is buffered and processed by the data (word) collector , and then send the miniature wireless data transmission station. After receiving the data, the miniature digital transmission station modulates it into a wireless radio frequency signal and radiates into the air through the antenna 261 . In this way, the wireless data transmission station at the remote sulfur hexafluoride gas online monitoring system can receive the signal from the miniature wireless data transmission station in the air, and after amplifying, demodulating and restoring the data signal, send the sulfur hexafluoride gas online The computer in the monitoring system center processes, calculates and displays, and generates data reports and other related information, so that this product can transmit the sulfur hexafluoride gas density value through wireless remote transmission to achieve long-distance transmission, which is conducive to the realization of online monitoring of hexafluoride Density P ₂₀ of sulfur gas electrical equipment. The signal acquisition, internal calculation, and voltage signal output of the above-mentioned single-chip microcomputer all adopt existing conventional technical means. For example, the internal calculation process can be obtained through formula calculation or querying the SF ₆ density data under the corresponding temperature and pressure conditions.

And one end of the Bourdon tube 3 of the density relay is welded on the base 5, and the other end is welded on the tube riser 14, and the tube riser 14 is fixed together with one end of the temperature compensation sheet 4, and the other end of the temperature compensation sheet 4 is connected to the The connecting arms 13 are fixed together; the connecting arms 13 are fixed with one end of the connecting rod 6, and the other end of the connecting rod 6 is connected with the starting end of the displacement reducing mechanism 7; the displacement reducing mechanism 7 is a fan-shaped curved surface transmission mechanism. The micro switches 10 are respectively fixed on the base 5 , and the micro switches 10 respectively have contact operating handles 1011 . The signal adjustment mechanism 11 and the three micro-switches 10 are arranged in pairs and installed on the central shaft 72 respectively. The central shaft 72 is an extension of the gear shaft 70 and is integrated with the gear shaft 70 . The signal adjustment mechanism 11 is three eccentric wheels installed on the central shaft 72 at intervals. The dial 1 is fixed on the base 5 , and the pointer 2 is fixed on the front end of the movement gear shaft 70 . The signal adjustment mechanism 11 drives the contact operating handle 1011 according to the gas density value and pressure value, so that the contact on the micro switch 10 is turned on or off; On the casing 8; the joint 9 is fixed on the casing 8, the watch glass 17, the cover 16 and its sealing ring are respectively fixed on the casing 8, which can protect the internal mechanism of the casing 8 from mechanical damage, dirt and rainwater intrusion . One end of the pipe is connected with the base 5 and is reliably sealed; the other end of the pipe is connected with the joint 9 and is reliably sealed; the switch reinforcement mechanism (the switch reinforcement mechanism is connected by several reinforcements and fixed with screws and nuts) On the side of each micro switch (type) switch, form a strengthening mechanism respectively adapted to the width of the switch housing, only play a good reinforcing effect on the housing of each micro switch, and its shape is a rectangle) fixed on the micro switch 10 In addition, when the switch is opened and closed to generate strong vibration, the shell of the micro switch 10 can be prevented from breaking, and the contact operating handle 1011 of the micro switch 10 can be prevented from falling off, thereby greatly improving the anti-vibration performance of the relay and ensuring reliable operation of the system.

Referring to Fig. 4, connecting arm 13 is connected with one end of connecting rod 6 again, and the other end of connecting rod 6 is connected with the starting end of displacement reducing mechanism 7; Curved surface gear 71, central gear 73, upper clamping plate 75, lower clamping plate; Upper clamping plate 75 and lower clamping plate are fixed on the support 5 at intervals and in parallel, and a fan-shaped curved surface gear rotating shaft 710 is connected between the upper clamping plate 75 and the lower clamping plate. The center of circle of the gear 71 also radially extends a transmission arm 711 integrally, the fan-shaped curved surface gear 71 is installed on the fan-shaped curved surface gear rotating shaft 710, and one end of the transmission arm 711 is connected with the other end of the connecting rod 6 as the starting end of the displacement reduction mechanism 7; The central gear 73 is fixedly installed on the gear shaft 70 as the reducing end of the displacement reducing mechanism 7 and is meshed with the curved sector gear 71; since the radius of the curved sector gear 71 is 3 times smaller than the radius of the central gear 73, it is 1/3. So it can be reduced. Sulfur hexafluoride gas density relay of the present invention adopts micro-switch 10 because signal generator, and the control of micro-switch 10 contacts is all controlled by displacement reduction mechanism 7 after reducing, utilizes this displacement reduction mechanism 7 to reduce displacement, purpose makes Vibration is reduced to achieve the effect of shock absorption.

When the gas density value changes, the Bourdon tube 3 and the temperature compensation plate 4 produce a displacement, and the displacement is transmitted to the starting end of the displacement reduction mechanism 7 through the connecting rod 6, and the reduction end of the displacement reduction mechanism 7 (the central gear 73 and the gear shaft 70 ) is connected to the contact operating handle 1011 of the micro switch 10 through the signal adjustment mechanism 11, and the contact operating handle 1011 is driven according to the gas density value and the pressure value, so that the contact on the micro switch 10 is turned on or off, and then the micro switch 10 sends a corresponding signal. The (switching value) signal completes the function of the density relay.

The sulfur hexafluoride gas density relay of the present invention is based on the elastic element Bourdon tube 3, uses the temperature compensation plate 4 to correct the changing pressure and temperature, and reflects the change of the sulfur hexafluoride gas density. That is, under the pressure of sulfur hexafluoride gas in the measured medium, due to the effect of the temperature compensation sheet 4, the change of its density value and the corresponding change of the pressure value will force the end of the Bourdon tube 3 to produce corresponding elastic deformation —The displacement is transmitted to the gear shaft 70 of the displacement reduction mechanism 7 by means of the temperature compensating plate 4 and the connecting rod 6, and the gear shaft 70 is transmitted to the pointer 2, and then the measured sulfur hexafluoride gas density value is displayed on the dial 1 indicated above. If there is an air leak, its density value drops to a certain level (reaching the alarm or blocking value), the Bourdon tube 3 produces a corresponding downward displacement, and the connecting arm 13 moves downward through the temperature compensation sheet 4, which is transmitted to the connecting rod 6 , the connecting rod 6 is transmitted to the displacement reduction mechanism 7, the sector shaft 71 is transmitted to the central axis and then reduced, the central axis 72 drives the corresponding signal adjustment mechanism 11 to rotate, and when it reaches a certain level, the signal adjustment mechanism 11 triggers the corresponding micro switch 10 The contact operating handle 1011 of the corresponding micro switch 10 contacts is just connected, and a corresponding signal (alarm or blocking) is sent to monitor and control the sulfur hexafluoride gas density in equipment such as electrical switches, so that the electrical equipment can work safely. If the density value increases, the pressure value also increases correspondingly. When it rises to a certain extent, the Bourdon tube 3 also produces a corresponding upward displacement. Through the temperature compensation sheet 4, the connecting arm 13 is displaced upward and transmitted to the connecting rod. 6. The connecting rod 6 is transmitted to the displacement reduction mechanism 7, the fan-shaped shaft 71 is transmitted to the central shaft 72, and the central shaft 72 drives the corresponding signal adjustment mechanism 11. When it reaches a certain level, the signal adjustment mechanism 11 does not trigger the corresponding micro switch 10. Corresponding microswitch 10 contacts just disconnect, and signal (alarm or blocking) just removes.

In summary, the sulfur hexafluoride gas density relay of the present invention adopts pressure sensor 21, temperature sensor 20, gathers pressure and temperature signal by pressure sensor 21, temperature sensor 20, through amplifying circuit 22 pair of measured pressure and temperature Signal amplification, the amplified pressure and temperature signals are collected by the single-chip microcomputer 23, and the sulfur hexafluoride gas density _P20 is obtained through the internal calculation of the single-chip microcomputer 23, and then the data _P20 transmitted by the single-chip microcomputer 23 is processed by the data (word) collector. Buffer processing, and then send to the micro wireless data transmission station. After receiving the data, the miniature digital transmission station modulates it into a wireless radio frequency signal and radiates into the air through the antenna 261 . The signal acquisition, internal calculation, and voltage signal output of the above-mentioned single-chip microcomputer all adopt existing conventional technical means. For example, the internal calculation process can be obtained through formula calculation or querying the SF ₆ density data under the corresponding temperature and pressure conditions.

In addition, because the signal generator of the density relay adopts a micro switch 10, and the control of the contacts of the micro switch 10 is all controlled by the displacement reduction mechanism 7 after the reduction, the purpose is to reduce the vibration and achieve the effect of shock absorption, so the anti-vibration performance is high, and the contact Good electrical performance, long life, more accurate temperature compensation performance.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than as a limitation to the present invention, as long as within the scope of the spirit of the present invention, the above described embodiments All changes and modifications fall within the scope of the claims of the present invention.

Claims (9)

1. A wireless remote transmission type sulfur hexafluoride gas density relay, comprising a housing (8), on the outer side of the housing (8) respectively fixedly installed with a terminal block (15) and a joint (9), on the housing (8) A base (5) is fixedly installed in the body (8), and it is characterized in that: it also includes a Bourdon tube (3), one end of the Bourdon tube (3) is fixed on the base (5) and the other end It is connected with one end of the temperature compensation sheet (4), and the other end of the temperature compensation sheet (4) is connected with the input end of the displacement reduction mechanism (7) through a connecting piece, and the output end of the displacement reduction mechanism (7) is connected with the pointer (2 ) connection, and the dial (1) is also fixedly installed on the base (5). 2. A wireless remote transmission type sulfur hexafluoride gas density relay as claimed in claim 1, characterized in that: wherein the Bourdon tube (3) adopts a C-type Bourdon tube (3), and the connector adopts a connecting rod ( 6). 3. A wireless remote transmission type sulfur hexafluoride gas density relay as claimed in claim 1, characterized in that: wherein the joint (9) passes through the temperature sensor (20) and the pressure sensor on the pipeline and the base (5) (21) CONNECTED. 4. A wireless remote transmission type sulfur hexafluoride gas density relay as claimed in claim 3, characterized in that: wherein the output terminals of the temperature sensor (20) and the pressure sensor (21) pass through the amplifier circuit, the single chip microcomputer (23) ), the data collector is connected with the miniature wireless data transmission station, and this miniature wireless data transmission station is also connected with the antenna (261) outside the casing (8). 5. A kind of wireless remote transmission type sulfur hexafluoride gas density relay as claimed in claim 1, characterized in that: wherein a watch glass (17) is installed on the housing (8) through a sealing ring, and the watch glass ( 17) casing (16) is also installed on. 6. A wireless remote transmission type sulfur hexafluoride gas density relay according to any one of claims 1 to 5, characterized in that: the displacement reduction mechanism (7) adopts a fan-shaped curved surface transmission mechanism, which specifically includes the above Clamping plate (75) and lower clamping plate, between this upper clamping plate (75) and lower clamping plate, are respectively installed with meshing fan-shaped surface gear (71) and central gear (73) by rotating shaft, this fan-shaped curved surface gear (71) is used as displacement The input end of the reduction mechanism (7), and the rotating shaft of the central gear (73) is used as the output end of the displacement reduction mechanism (7). 7. A wireless remote transmission type sulfur hexafluoride gas density relay as claimed in claim 6, characterized in that: the radius of the fan-shaped curved gear (71) is smaller than the radius of the central gear (73). 8. A wireless remote transmission type sulfur hexafluoride gas density relay as claimed in claim 6, characterized in that: a signal generator is also provided in the housing (8), and the signal generator includes a fixed At least one micro switch (10) on the base (5), and the signal adjustment mechanism (11) that cooperates with this micro switch (10) is installed on the rotating shaft of sun gear (73), thereby can be on this sun gear The rotating shaft of (73) triggers microswitch (10) when rotating to a certain angle, and all microswitches (10) are all connected with terminal block (15). 9. A wireless remote transmission type sulfur hexafluoride gas density relay as claimed in claim 8, characterized in that: the signal adjustment mechanism (11) is specifically installed on the rotating shaft of the central gear (73) and a micro switch (10) Eccentric wheels of equal quantity.