CN110159854A - A kind of sulfur hexafluoride equipment tonifying Qi crossover sub, air compensating system and its supplementing method for air - Google Patents

Abstract

The invention discloses a gas supplement conversion joint for sulfur hexafluoride equipment, which includes a joint body, the joint body is provided with an operation through hole, and one end of the operation through hole is provided with a threaded connection with a self-sealing check valve of sulfur hexafluoride equipment. nut, the other end of the operation through hole is provided with a sealing hole, and a sealing and fixing structure is arranged in the sealing hole, and there is an air supply hole penetrating through the operation through hole and the outside of the joint body between the sealing and fixing structure and the connecting piece, and the inside of the operation through hole is provided with An operating rod that moves in the axial direction of the operating through hole. The invention also discloses a gas supply system for sulfur hexafluoride equipment and a gas supply method for sulfur hexafluoride equipment. The invention is simple in structure and reasonable in design. The connector thimble has a certain degree of activity, reduces errors and damage caused by frequent processing and assembling of the connector thimble, and has the function of removing moisture before replenishing air, and can also display the countdown of moisture removal, and has a good use effect.

Description

Gas supply conversion joint for sulfur hexafluoride equipment, gas supply system and gas supply method thereof

technical field

The invention relates to the technical field of gas replenishment for sulfur hexafluoride equipment used in substations, in particular to a gas replenishment conversion joint for sulfur hexafluoride equipment, a gas replenishment system and a gas replenishment method thereof.

Background technique

Sulfur hexafluoride (SF6) is a colorless, odorless, stable chemical substance that is gaseous at normal temperature and pressure. Because it has very good insulation and arc extinguishing capabilities, it is used as an insulating medium and arc extinguishing medium It is widely used in power equipment.

In recent years, with the rapid development of my country's electric power industry and the improvement of technical equipment, a large number of SF6 electrical equipment has been put into operation. SF6 gas has been widely used in power systems due to its excellent insulation and arc extinguishing properties, and has almost become a medium The only insulating and arc extinguishing medium used in high voltage, high voltage and extra high voltage switches. At present, SF6 gas insulated circuit breakers and SF6 gas insulated substations (GIS) have been widely used in the 63-750KV power system in our country, so the daily supervision of SF6 electrical equipment is becoming more and more important. Due to the large number of SF6 equipment and long-term operation, there is often the possibility of air leakage, which requires regular air replenishment.

Relevant national standards, industry standards, and enterprise standards all have corresponding requirements for the on-site storage and installation environment of gas-insulated substations (GIS) in infrastructure projects. (GIS) Whether the gas pressure in each air chamber of the transport unit is consistent with the factory air pressure record. Each compartment should meet the standard micro positive pressure [0.02MPa, 0.05MPa] of sulfur hexafluoride gas or nitrogen." And during the storage process In the middle, "The pressure value should be checked regularly and recorded according to the requirements of the product technical documents (if the product has no clear requirements, it should be checked at least once every half a month), and if there is any abnormality, it should be reported to the manufacturer in time and measures should be taken." "Micro positive pressure The "status" is a necessary condition to ensure that the gas-insulated substation (GIS) equipment is stored to prevent moisture in the air from entering the gas-insulated substation (GIS) equipment and causing internal corrosion of the GIS equipment.

The following problems exist in the gas replenishment operation: 1. When the sulfur hexafluoride equipment is in use, when it is necessary to replenish the gas, usually the gas storage tank is directly connected to the sulfur hexafluoride equipment through the pipeline, and the six The self-sealing valve core of the sulfur fluoride equipment supplies air to the sulfur hexafluoride equipment directly through the gas storage tank, and the sealing effect cannot be guaranteed. 2. It is impossible to dehumidify the pipeline before replenishing the gas, which will cause the moisture in the pipeline to enter the sulfur hexafluoride equipment, affecting the safety of the sulfur hexafluoride equipment.

Contents of the invention

The technical problem to be solved by the present invention is to provide a gas supply conversion joint for sulfur hexafluoride equipment, a gas supply system and a gas supply method for the above-mentioned deficiencies in the prior art. The structure is simple, the design is reasonable, and the joint thimble It has a certain degree of activity, which can reduce errors and damage caused by frequent processing and assembling joint thimbles, and has the function of dehumidification before replenishing air, and can also display the countdown of dehumidification, and the use effect is good.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a sulfur hexafluoride equipment gas supply conversion joint, which is characterized in that it includes a joint body, and the joint body is provided with an operation through hole, and the operation through hole One end is provided with a connecting nut threadedly connected with the self-sealing check valve of sulfur hexafluoride equipment, the other end of the operation through hole is provided with a sealing hole, and a sealing and fixing structure is arranged in the sealing hole, and the sealing and fixing structure is connected with the There is an air supply hole that passes through the operation through hole and the outside of the joint body between the connecting pieces. An operation rod that moves along the axial direction of the operation through hole is arranged inside the operation through hole. One end of the operation rod is provided with six The thimble of the gas charging port of the sulfur fluoride equipment is flexibly connected to the joint thimble, and the other end of the operating rod passes through the sealing and fixing structure and is connected with a pushing assembly.

The above-mentioned gas supply adapter for sulfur hexafluoride equipment is characterized in that: the inner wall of the operation through hole is provided with an internal thread, and the outer wall of the operating rod is provided with an external thread compatible with the internal thread.

The above-mentioned gas supply conversion joint for sulfur hexafluoride equipment is characterized in that: the sealing and fixing structure includes: a sealing nut and a sealing ring; the sealing nut is fixedly connected to the sealing hole, and the sealing ring is arranged at One side of the seal hole.

A sulfur hexafluoride equipment air supplement system, characterized in that it includes a gas storage bottle, an air storage valve, an air intake pipeline, a moisture removal device, an air supply pipeline, and the sulfur hexafluoride equipment supplement described in claim 1 or 2. The gas conversion joint, the air intake pipeline and the air supply pipeline are all electric heating wire tubes, and the dehumidification device includes a control cabinet, a control panel arranged on the control cabinet, and a controller, a vacuum pump and a controller installed in the control cabinet. Three-way valve, the air intake pipeline and the air supply pipeline are respectively connected to one port of the three-way valve, the third port of the three-way valve is connected to the vacuum pump, and the input terminal of the controller is connected to a power supply module, A parameter input module, an intake air humidity sensor for detecting the humidity value in the air intake pipeline, an air supply humidity sensor for detecting the humidity value in the air supply pipeline, and an air supply humidity sensor for detecting the temperature value in the air intake pipeline an intake air temperature sensor, an air supply temperature sensor for detecting the temperature value in the air supply pipeline, and a pressure gauge for detecting the outlet pressure of the air intake pipeline, and the output terminal of the controller is connected with a parameter display module, a countdown timer A display module, a prompt module, and a heating switch module connected to the power supply module. The control cabinet is provided with an air supply interface for connecting the air supply pipeline, an air intake interface for connecting the intake pipeline, and an electrical connection with the air supply interface. The connected first charging output interface and the second charging output interface are electrically connected to the air intake interface, and the air supply interface and the air intake interface are both provided with electrode contacts electrically connected to the heating wire tube.

The above-mentioned air supply system for sulfur hexafluoride equipment is characterized in that: the air intake pipeline includes a pipe fitting, a first insulation layer and a second insulation layer sleeved on the outer surface of the pipe fitting, and the A heating wire is arranged between the first insulation and heat insulation layer and the second insulation and heat insulation layer.

A method for supplementing sulfur hexafluoride equipment, characterized in that the method comprises the following steps:

Step 1. Airtightness inspection: check the airtightness of the air supply pipeline and the intake pipeline;

Step 2. Parameter acquisition:

Step 201, parameter input: input the pumping rate S _e of the vacuum pump, the length d ₁ and the inner diameter φ ₁ of the air supply pipeline, and the length d ₂ and inner diameter φ ₂ of the intake pipeline through the parameter input module;

Step 202, Obtain detection values: the intake humidity sensor acquires the humidity value H ₁ in the intake pipeline, the air supply humidity sensor acquires the humidity value H ₂ in the air supply pipeline, and the intake air temperature sensor acquires the temperature in the intake pipeline value T ₁ , the temperature sensor obtains the temperature value T ₂ in the air supply pipeline, and the pressure gauge obtains the pressure value P ₁ at the outlet position of the intake pipeline;

Step 3. Calculate the dehumidification time: the controller calculates the dehumidification time according to the formula Calculate the first dehumidification time t, where V represents the dehumidification volume, k represents the correction coefficient, P ₂ represents the pressure set value, H _set represents the humidity set value, T _set represents the humidity set value, α represents the humidity influence factor, β represents the temperature influence factor, ω ₁ represents the vacuum weight, ω ₂ represents Humidity weight, ω ₁ +ω ₂ =1;

Step 4, dehumidification: the controller sends the calculated first dehumidification time t to the countdown display module, and starts the drive module and the heating switch module at the same time;

Step 401, start dehumidification: the vacuum pump works at the pumping rate S _e , the first charging output interface supplies power to the air supply interface, and the second charging output interface supplies power to the air intake interface, when the temperature in the air intake pipeline and the air supply pipeline If the value is greater than T _set , the heating switch module stops working;

Step 402, duration verification: the countdown display module first displays the dehumidification duration t, and then decreases to zero on this basis, when it decreases to zero, enter step five, otherwise, enter step 401;

Step 5. Verification of dehumidification effect: the air intake humidity sensor obtains the humidity value H' ₁ after dehumidification in the air intake pipeline, and the air supply humidity sensor obtains the humidity value H' ₂ after dehumidification in the air supply pipeline, and the parameters display The module displays the humidity value H' ₁ after dehumidification and the humidity value H' ₂ after dehumidification, and the controller compares H' ₁ , H' ₂ and H _set , if H' ₁ <H _set and H' ₂ <H _set , go to step seven, otherwise go to step six;

Step 6. Dehumidification compensation:

Step 601, the controller according to the formula Calculate the dehumidification compensation time t';

Step 602, the controller sends the calculated dehumidification compensation duration t' to the countdown display module, and the countdown display module first displays the dehumidification compensation duration t', and on this basis, decrements to zero, and when it decrements to zero, enter step 7;

Step seven, replenishing qi:

Step 701, the drive module and the heating switch module stop working;

Step 702, open the gas storage valve and the gas supply conversion joint of the sulfur hexafluoride equipment;

Step 703, turn on the vacuum pump to realize the air supply of the sulfur hexafluoride equipment by the gas storage cylinder.

Compared with the prior art, the present invention has the following advantages:

1. The structure of the present invention is simple, the design is reasonable, and the realization, use and operation are convenient.

2. In the present invention, the operating rod drives the joint thimble to move along the axial direction of the operation through hole, so that the joint thimble has a certain degree of mobility, which reduces the error of the fixed thimble caused by processing, assembly, etc., and can well eliminate Due to the long-term on-site installation, the self-sealing check valve of the sulfur hexafluoride equipment is damaged. Therefore, the gas supply conversion joint of the sulfur hexafluoride equipment has good sealing performance, which can prevent the leakage of sulfur hexafluoride gas.

3. In the present invention, when the vacuum pump vacuumizes the gas supply pipeline and the intake pipeline from atmospheric pressure to the pressure setting value, the gas storage valve is closed, and the gas supply pipeline and the intake pipeline are both energized and heated to accelerate the pressure in the pipeline. The water vapor evaporates, and the evaporated water vapor is discharged with the vacuuming process, which acts as a dehumidifier and prevents moisture from entering the sulfur hexafluoride equipment and causing corrosion problems inside the equipment.

4. In the present invention, the dehumidification time is calculated by the controller, and the countdown display module displays the dehumidification countdown, which can play a role in reminding the staff and prevent the staff from blindly waiting for the dehumidification to end. The use effect is good.

To sum up, the present invention has a simple structure and a reasonable design. The joint thimble has a certain degree of activity, which reduces errors and damage caused by frequent processing and assembly of the joint thimble. It works well.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a cross-sectional view of a gas supply adapter for sulfur hexafluoride equipment in the present invention.

Fig. 2 is a sectional view of the main body of the street in the present invention.

Fig. 3 is a cross-sectional view of the connection between the air supply conversion joint of the sulfur hexafluoride equipment and the self-sealing check valve of the sulfur hexafluoride equipment in the present invention.

Fig. 4 is a structural schematic diagram of the gas supply system of the sulfur hexafluoride equipment in the present invention.

Fig. 5 is a structural schematic diagram of the moisture removal device in the present invention.

Fig. 6 is a structural schematic diagram of the air intake pipeline in the present invention.

Fig. 7 is a schematic circuit diagram of the gas supply system of the sulfur hexafluoride equipment in the present invention.

Fig. 8 is a flow chart of the method for replenishing gas to sulfur hexafluoride equipment in the present invention.

Explanation of reference signs:

11—operation through hole; 12—operating rod; 13—internal thread;

14—air supply hole; 15—sealing hole; 16—internal thread;

17—propelling assembly; 18—joint thimble; 19—connecting nut;

110—sealing ring; 111—sealing nut; 112—joint body;

2—air supply pipeline; 3—air storage cylinder; 4—intake pipeline;

41—the second insulation layer; 42—the first insulation layer; 43—the heating wire;

44—pipe fittings; 5—air storage valve; 6—dehumidification device;

61—control panel; 62—countdown display module; 63—three-way valve;

64—vacuum pump; 65—traveling wheel; 66—parameter display module;

67—second charging output interface; 68—air intake interface;

69—the first charging output interface; 610—air supply interface;

611—prompt module; 612—parameter input module; 613—push rod;

7—controller; 71—drive module; 72—heating switch module;

73—air supply humidity sensor; 74—intake air humidity sensor; 75—air supply temperature sensor;

76—intake air temperature sensor; 77—power supply module; 78—pressure gauge;

8—self-sealing check valve for sulfur hexafluoride equipment;

81—Inflatable port of sulfur hexafluoride equipment.

Detailed ways

The gas supply conversion joint for sulfur hexafluoride equipment, the gas supply system and the gas supply device thereof of the present invention will be further described in detail with reference to the accompanying drawings and the embodiments of the present invention.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or elements need not be limited to those steps explicitly listed or units, but may include other steps or units not explicitly listed or inherent to the process, method, product or apparatus.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations”. Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

As shown in Figures 1 to 3, the present invention includes a joint body 112, and the joint body 112 is provided with an operation through hole 11, and one end of the operation through hole 11 is provided with a self-closing check valve connected with sulfur hexafluoride equipment. 8 threaded connection nut 19, the other end of the operation through hole 11 is provided with a sealing hole 15, and a sealing and fixing structure is arranged in the sealing hole 15, and a through-hole is provided between the sealing and fixing structure and the connecting piece 19. The operation through hole 11 and the air supply hole 14 outside the joint body 112 are provided inside the operation through hole 11 with an operation rod 12 that moves along the axial direction of the operation through hole 11, and one end of the operation rod 12 is provided with a hexafluoro The joint thimble 18 is flexibly connected to the thimble of the charging port 81 of the sulfur sulfurization equipment, and the other end of the operating rod 12 passes through the sealing and fixing structure and is connected with a pushing assembly 17 .

In this embodiment, the inner wall of the operation through hole 11 is provided with an internal thread 16 , and the outer wall of the operating rod 12 is provided with an external thread compatible with the internal thread.

In actual use, the connecting nut 19 is threadedly connected with the self-sealing check valve 8 of the sulfur hexafluoride equipment, and the connection effect is good and the operation is convenient. The push assembly 17 is a handle. When the handle is turned, the operating rod 12 is threadedly matched with the operating through hole 11, so that the operating rod 12 moves along the axial direction of the operating through hole 11, and the operating rod 12 drives the joint thimble 18 along the axis of the operating through hole 11. Move in the direction, so that the connector thimble 18 has a certain degree of mobility, which reduces the error of the fixed thimble caused by processing, assembly, etc., and can well eliminate the self-sealing backstop of sulfur hexafluoride equipment caused by long-term on-site installation Damage to valve 8. When the joint thimble 18 pushes away the thimble of the gas charging port 81 of the sulfur hexafluoride equipment, the self-sealing check valve 8 of the sulfur hexafluoride equipment is opened, so the air supply conversion joint of the sulfur hexafluoride equipment has good sealing performance and can prevent six Sulfur fluoride gas leakage.

At the same time, the screw fit between the operating rod 12 and the operating through hole 11 also plays a role in limiting the position of the operating rod 12 .

The connecting nut 19 is provided with an internal thread 13 for screwing the self-sealing check valve 8 of the sulfur hexafluoride equipment. The bottom of the internal thread 13 is provided with a sealing groove. A sealing structure, such as a sealing ring or other sealing structures, may be provided in the sealing groove to meet the sealing effect.

In this embodiment, the seal fixing structure includes: a seal nut 111 and a seal ring 110; side.

In actual use, in order to simplify the sealing and fixing structure and ensure its sealing effect, especially to cooperate with the sealing of the operating rod, the sealing and fixing structure includes: a sealing nut 111 and a sealing ring 110; the operating through hole 11 is connected to the sealing and fixing structure One end is provided with a sealing hole 15 with a pit structure, and the sealing nut 111 is fixedly connected inside the sealing hole 15, which facilitates the connection of the sealing nut 111; in order to further improve the sealing effect, a sealing ring is arranged between the sealing nut 111 and the bottom of the sealing hole 15 110 seal. In actual use, there are multiple sealing rings 110, and the multiple sealing rings 110 ensure that there is basically no SF6 leakage during the installation process, and ensure the reliable sealing of the connection during the operation of the equipment.

As shown in Figure 4, Figure 5 and Figure 8, the present invention also includes a sulfur hexafluoride equipment air supply system, including a gas storage bottle 3, a gas storage valve 5, an air intake pipeline 4, a moisture removal device 6, and an air supply pipe Road 2 and the above-mentioned sulfur hexafluoride equipment gas supply conversion joint, the air intake pipeline 4 and the gas supply pipeline 2 are both electric heating wire tubes, and the moisture removal device 6 includes a control cabinet and a control panel arranged on the control cabinet 61, and a controller 7, a vacuum pump 64 and a three-way valve 63 arranged in the control cabinet, the air intake pipeline 4 and the air supply pipeline 2 are respectively connected to a port of the three-way valve 63, and the three-way valve The third port of 63 is connected with the vacuum pump 64, and the input terminal of the controller 7 is connected with a power supply module 77, a parameter input module 612, an intake humidity sensor 74 for detecting the humidity value in the intake pipeline 4, The air supply humidity sensor 73 for detecting the humidity value in the air supply pipeline 2, the intake air temperature sensor 76 for detecting the temperature value in the air intake pipeline 4, and the air intake temperature sensor 76 for detecting the temperature value in the air supply pipeline 2 The air supply temperature sensor 75 and the pressure gauge 78 for detecting the outlet pressure of the air intake pipeline 4, the output terminal of the controller 7 is connected with a parameter display module 66, a countdown display module 62, a prompt module 611 and the The heating switch module 72 connected to the power supply module 77, the control cabinet is provided with an air supply interface 610 for connecting the air supply pipeline 2, an air intake interface 68 for connecting the air intake pipeline 4, and an electrical connection with the air supply interface 610. The first charging output interface 69 and the second charging output interface 67 electrically communicate with the air inlet interface 68 , and the air supply interface 610 and the air inlet interface 68 are both provided with electrode contacts electrically communicating with the heating wire tube.

In this embodiment, the countdown display module 62 , the parameter display module 66 , the prompt module 611 and the parameter input module 612 are all arranged on the control panel 61 . A heating switch for turning on the heating switch module 72 is arranged on the control panel 61 .

In actual use, the vacuum pump 64 and the heating switch module 72 provide moisture removal functions for the air supply system of the sulfur hexafluoride equipment through heating and vacuuming operations.

The humidity setting value, the temperature setting value and the pressure setting value are set through the parameter input module 612 . When the vacuum pump 64 vacuumizes the gas supply pipeline 2 and the intake pipeline 4 from the atmospheric pressure to the pressure setting value, the gas storage valve 5 is closed, and the gas supply pipeline 2 and the intake pipeline 4 are both energized and heated to accelerate the pressure in the pipeline. The water vapor evaporates, and the evaporated water vapor is discharged along with the vacuuming process, which plays the role of dehumidification until the humidity values in the air supply pipeline 2 and the intake pipeline 4 are lower than the humidity setting value, and the dehumidification ends.

During the heating process, when the temperature in the pipeline is higher than the temperature setting value, both the supply air pipeline 2 and the intake pipeline 4 are powered off to stop heating; when the temperature in the pipeline is lower than the temperature setting value, the supply air pipeline 2 and the intake pipeline Road 4 is re-energized for heating.

In actual use, the bottom of the control cabinet is provided with traveling wheels 65 . A push rod 613 is arranged on the control cabinet.

As shown in Figure 6, in this embodiment, the air intake pipeline 4 includes a pipe fitting 44, a first insulation layer 42 and a second insulation layer 41 sleeved on the outer surface of the pipe fitting 44, the first insulation layer A heating wire 43 is arranged between the first insulation layer 42 and the second insulation layer 41 .

In actual use, the structure of the intake pipeline 4 and the supplementary air pipeline 2 is the same. The heating wire 43 in the air intake pipeline 4 is electrically connected to the electrode contact provided in the air intake interface 68 , and the heating wire 43 in the air supply pipeline 2 is electrically connected to the electrode contact provided in the air supply interface 610 . The first heat insulation layer 42 and the second heat insulation layer 41 not only reduce the heat exchange between the heating wire 43 and the environment outside the pipeline, but also protect the staff from high temperature burns.

As shown in Figure 8, the present invention also includes a method for supplementing sulfur hexafluoride equipment, the method comprising the following steps:

Step 1. Airtightness inspection: Check the airtightness of the air supply pipeline 2 and the air intake pipeline 4 . Check the system installation, check the management connections, and make sure the system is airtight.

Step 2. Parameter acquisition:

Step 201 , parameter input: input the pumping rate _Se of the vacuum pump 64 , the length d ₁ and inner diameter φ ₁ of the air supply pipeline 2 , and the length d ₂ and inner diameter φ ₂ of the intake pipeline 4 through the parameter input module 612 .

Step 202, obtain detection values: the intake air humidity sensor 74 obtains the humidity value H ₁ in the air intake pipeline 4 , the air supply humidity sensor 73 obtains the humidity value H ₂ in the air supply pipeline 2 , and the intake air temperature sensor 76 obtains the humidity value H 2 in the air supply pipeline 2 . The temperature value T ₁ in the air pipeline 4 , the temperature sensor 75 acquires the temperature value T ₂ in the air supply pipeline 2 , and the pressure gauge 78 acquires the pressure value P ₁ at the outlet of the intake pipeline 4 .

In actual use, the pressure value P1 at the outlet of the intake pipe ₄ is atmospheric pressure.

Step 3. Calculate the first dehumidification duration: the controller 7 calculates the time according to the formula Calculate the first dehumidification time t, where V represents the dehumidification volume, k represents the correction coefficient, P ₂ represents the pressure set value, H _set represents the humidity set value, T _set represents the humidity set value, α represents the humidity influence factor, β represents the temperature influence factor, ω ₁ represents the vacuum weight, ω ₂ represents Humidity weight, ω ₁ +ω ₂ =1.

The first dehumidification time t consists of two parts, vacuuming and heating dehumidification. The value of k is shown in the table below:

In actual use, the value of _ω1 is:

Step 4. Dehumidification: the controller 7 sends the calculated first dehumidification duration t to the countdown display module 62, and starts the driving module 71 and the heating switch module 72 at the same time.

Step 401, start dehumidification: the vacuum pump 64 works at the pumping rate _Se , the first charging output interface 69 supplies power to the air supply interface 610, and the second charging output interface 67 supplies power to the air inlet interface 68. When the air intake pipeline 4 and When the temperature in the supplementary air pipeline 2 is greater than T _set , the heating switch module 72 stops working.

During the heating process, when the temperature in the pipeline is higher than the temperature setting value, both the supply air pipeline 2 and the intake pipeline 4 are powered off to stop heating; when the temperature in the pipeline is lower than the temperature setting value, the supply air pipeline 2 and the intake pipeline Road 4 is re-energized for heating. When the vacuum pump 64 vacuumizes the gas supply pipeline 2 and the intake pipeline 4 from the atmospheric pressure to the pressure setting value, the gas storage valve 5 is closed, and the gas supply pipeline 2 and the intake pipeline 4 are both energized and heated to accelerate the pressure in the pipeline. The water vapor evaporates, and the evaporated water vapor is discharged along with the vacuuming process, which plays the role of dehumidification until the humidity values in the air supply pipeline 2 and the intake pipeline 4 are lower than the humidity setting value, and the dehumidification ends.

Step 402, duration verification: the countdown display module 62 firstly displays the first dehumidification duration t, and on this basis, decrements to zero. When the decrement reaches zero, go to step five, otherwise go to step 401. Through step 402, it is ensured that the first dehumidification time reaches the duration t, and it can serve as a reminder to the staff, preventing the staff from blindly waiting for the dehumidification to end, and the use effect is good.

Step 5. Verification of dehumidification effect: the intake air humidity sensor 74 obtains the primary air intake humidity value H'1 in the air intake pipeline ₄ , and the air supply humidity sensor 73 obtains the primary air supply humidity value H' in the air supply pipeline 2 _2. The parameter display module 66 displays the primary air intake humidity value _H'1 and the primary air supply humidity value H'2. _The controller 7 compares _H'1 , _H'2 and _Hset , if _H'1 < _Hset and H' ₂ <H _set , go to step seven, otherwise go to step six. When the first dehumidification time is over, if the humidity in the air intake pipeline 4 and the air supply pipeline 2 are both lower than the humidity setting value, it is considered that the dehumidification is over, otherwise it is considered that the dehumidification has not reached the standard. In order to prevent moisture from entering the sulfur hexafluoride equipment , so proceed to step six.

Step 6. Dehumidification compensation:

Step 601, controller 7 according to the formula Calculate the dehumidification compensation time t'. In actual use, the dehumidification compensation time t' is calculated based on the primary humidity value H'1 _of the intake air and the primary air supply humidity value _H'2 as the initial values of the parameters.

Step 602, the controller 7 sends the calculated dehumidification compensation duration t' to the countdown display module 62, and the countdown display module 62 first displays the dehumidification compensation duration t', and then decreases to zero on this basis. Step seven.

After the dehumidification compensation, the dehumidification effect is no longer verified, and the dehumidification effect meets the set conditions by default.

Step seven, replenishing qi:

Step 701, the drive module 71 and the heating switch module 72 stop working;

Step 702, open the gas storage valve 5 and the gas supply conversion joint of the sulfur hexafluoride equipment;

Step 703, turn on the vacuum pump 64 to realize the air supply of the gas storage bottle 3 to the sulfur hexafluoride equipment.

The above is only an embodiment of the present invention, and does not limit the present invention in any way. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical solution of the present invention. within the scope of protection.

Claims (6)

1. A gas supply conversion joint for sulfur hexafluoride equipment, characterized in that: it includes a joint body (112), and the joint body (112) is provided with an operation through hole (11), and the operation through hole (11) One end is provided with a connecting nut (19) threadedly connected with the self-sealing check valve (8) of sulfur hexafluoride equipment, and the other end of the operation through hole (11) is provided with a sealing hole (15), and the sealing hole ( 15) There is a sealing and fixing structure inside, and there is an air supply hole (14) passing through the operation through hole (11) and the outside of the joint body (112) between the sealing and fixing structure and the connector (19). The inside of the through hole (11) is provided with an operating rod (12) that moves along the axial direction of the operating through hole (11), and one end of the operating rod (12) is provided with a thimble that is connected to the charging port (81) of the sulfur hexafluoride equipment. A joint thimble (18) for flexible connection, the other end of the operating rod (12) passes through the sealing and fixing structure and is connected with a pushing assembly (17). 2. A gas supply adapter for sulfur hexafluoride equipment according to claim 1, characterized in that: the inner wall of the operation through hole (11) is provided with internal threads, and the outer wall of the operating rod (12) is provided with There are external threads adapted to said internal threads. 3. A sulfur hexafluoride equipment gas supply conversion joint according to claim 1, characterized in that: the sealing and fixing structure includes: a sealing nut (111) and a sealing ring (110); the sealing nut (111 ) is fixedly connected with the sealing hole (15), and the sealing ring (110) is arranged on the side of the sealing nut (111) facing the sealing hole (15). 4. A gas supply system for sulfur hexafluoride equipment, characterized in that it includes a gas storage bottle (3), a gas storage valve (5), an air intake pipeline (4), a moisture removal device (6), and a gas supply pipeline ( 2) and the sulfur hexafluoride equipment gas supply conversion joint described in claim 1 or 2, the air intake pipeline (4) and the gas supply pipeline (2) are both electric heating wire tubes, and the moisture removal device (6) Including a control cabinet, a control panel (61) arranged on the control cabinet, and a controller (7), a vacuum pump (64) and a three-way valve (63) arranged in the control cabinet, the air intake pipeline (4) and the air supply pipeline (2) are respectively connected with one port of the three-way valve (63), the third port of the three-way valve (63) is connected with the vacuum pump (64), and the input of the controller (7) The terminal is connected with a power supply module (77), a parameter input module (612), an intake air humidity sensor (74) for detecting the humidity value in the air intake line (4), and an intake air humidity sensor (74) for detecting the air supply line (2) The air supply humidity sensor (73) for the internal humidity value, the intake air temperature sensor (76) for detecting the temperature value in the air intake pipeline (4), and the air intake temperature sensor (76) for detecting the temperature value in the air supply pipeline (2) An air supply temperature sensor (75) and a pressure gauge (78) for detecting the outlet pressure of the intake pipeline (4), the output terminal of the controller (7) is connected with a parameter display module (66) and a countdown display module (62), a prompt module (611) and a heating switch module (72) connected to the power supply module (77), the control cabinet is provided with an air supply interface (610) for connecting the air supply pipeline (2), The air intake interface (68) for connecting the intake pipeline (4), the first charging output interface (69) electrically connected with the air supply interface (610), and the second charging output interface (68) electrically communicated with the air intake interface (68) The interface (67), the air supply interface (610) and the air inlet interface (68) are all provided with electrode contacts electrically connected to the heating wire tube. 5. The air supply system for sulfur hexafluoride equipment according to claim 4, characterized in that: the air intake pipeline (4) includes a pipe fitting (44), a pipe sleeved on the outer surface of the pipe fitting (44) The first insulation and heat insulation layer (42) and the second insulation and heat insulation layer (41), an electric heating wire (43) is arranged between the first insulation and heat insulation layer (42) and the second insulation and heat insulation layer (41) . 6. A method utilizing the sulfur hexafluoride equipment gas supply system as claimed in claim 4 to supplement the gas, characterized in that the method comprises the following steps: Step 1. Airtightness inspection: check the airtightness of the air supply pipeline (2) and the air intake pipeline (4); Step 2. Parameter acquisition: Step 201, parameter input: input the pumping rate S _e of the vacuum pump (64), the length d ₁ and inner diameter φ ₁ of the air supply pipeline (2), and the length d of the intake pipeline (4) through the parameter input module (612) ₂ and inner diameter φ ₂ ; Step 202, Obtain detection values: the intake humidity sensor (74) acquires the humidity value H ₁ in the intake pipeline (4), and the air supply humidity sensor (73) acquires the humidity value H ₂ in the air supply pipeline (2) , the intake air temperature sensor (76) obtains the temperature value T ₁ in the intake pipe (4), the temperature sensor (75) obtains the temperature value T ₂ in the air supply pipe (2), and the pressure gauge (78) obtains the The pressure value P1 of the outlet position of the air intake pipeline ( ₄ ); Step 3, calculate the dehumidification duration: the controller (7) according to the formula Calculate the first dehumidification time t, where V represents the dehumidification volume, k represents the correction coefficient, P ₂ represents the pressure set value, H _set represents the humidity set value, T _set represents the humidity set value, α represents the humidity influence factor, β represents the temperature influence factor, ω ₁ represents the vacuum weight, ω ₂ represents Humidity weight, ω ₁ +ω ₂ =1; Step 4, dehumidification: the controller (7) sends the calculated first dehumidification duration t to the countdown display module (62), and simultaneously starts the drive module (71) and the heating switch module (72); Step 401, start dehumidification: the vacuum pump (64) works at the pumping rate _Se , the first charging output interface (69) supplies power to the air supply interface (610), and the second charging output interface (67) is the air intake interface ( 68) power supply, when the temperature value in the air intake pipeline (4) and the air supply pipeline (2) is greater than T _set , the heating switch module (72) stops working; Step 402, duration verification: the countdown display module (62) first displays the dehumidification duration t, and then decreases to zero on this basis, when it decreases to zero, enter step five, otherwise enter step 401; Step 5. Verification of dehumidification effect: the intake air humidity sensor (74) obtains the humidity value H'1 after dehumidification in the air intake pipeline ( ₄ ), and the air supply humidity sensor (73) obtains the humidity value H'1 in the air supply pipeline (2). The humidity value H' ₂ after dehumidification, the parameter display module (66) displays the humidity value H' ₁ after dehumidification and the humidity value H' ₂ after dehumidification, and the controller (7) controls H' ₁ , H' ₂ and H _set , if H' ₁ <H _set and H' ₂ <H _set , go to step 7, otherwise go to step 6; Step 6. Dehumidification compensation: Step 601, controller (7) according to the formula Calculate the dehumidification compensation time t'; Step 602, the controller (7) sends the calculated dehumidification compensation duration t' to the countdown display module (62), and the countdown display module (62) first displays the dehumidification compensation duration t', and then decreases to zero on this basis , when it decreases to zero, go to step 7; Step seven, replenishing qi: Step 701, the drive module (71) and the heating switch module (72) stop working; Step 702, open the gas storage valve (5) and the gas supply conversion joint of the sulfur hexafluoride equipment; Step 703, turn on the vacuum pump (64) to realize the air supply of the sulfur hexafluoride equipment from the gas storage bottle (3).