Gas cylinder heating device and multifunctional SF6 inflation equipment

Abstract

The invention relates to the field of SF6 inflation, and particularly discloses a gas cylinder heating device and multifunctional SF6 inflation equipment. The heating device comprises a heating device body, a containing cavity used for containing a gas cylinder is formed in the heating device body, an opening of the containing cavity faces upwards, a gas curtain is arranged at a top opening of the containing cavity, a containing plate parallel to the bottom wall of the containing cavity is arranged in the containing cavity, and a semi-closed heating area is formed between the gas curtain and the containing plate. And a heating assembly for heating the gas cylinder is arranged in the heating area. And a water bath heating and steam heating combined method is adopted, so that the heat exchange efficiency is higher, and the heating effect is more excellent.

Description

Technical Field

[0001] The present invention relates to the field of SF6 charging, and in particular to a gas cylinder heating device and multifunctional SF6 charging equipment. Background Art

[0002] In recent years, with the rapid development of my country's power industry and the improvement of technical equipment, SF6 electrical equipment has been widely used in power systems. There are many SF6 electrical equipment and they often leak after long-term operation, which requires regular replenishment of SF6 gas to maintain sufficient gas volume. SF6 gas replenishment usually uses SF6 filling equipment to transport SF6 gas cylinders to gas transmission points for gas transmission; due to economic reasons, nitrogen and SF6 mixed gas are usually replenished.

[0003] During the inflation process, the SF6 stored in the gas cylinder is in liquid form inside the gas cylinder. During inflation, the volume of SF6 expands rapidly when the liquid is converted into gas, accompanied by a large amount of heat absorption. The temperature inside the gas cylinder also drops sharply, and the output pressure of the gas cylinder becomes lower and lower, which makes the inflation speed of the gas cylinder slow and the inflation efficiency decreases. Therefore, during the gas replenishment process, a heating device is needed to heat the gas cylinder to ensure sufficient inflation efficiency, but the pressure of nitrogen changes relatively little with temperature, and inflation can be completed without heating. The two require different transportation environments.

[0004] The existing heating method is usually to surround the outer wall of the gas cylinder with a heating plate, and then drive the heating plate to work through an external power supply to heat the gas cylinder. However, the heating temperature of the heating plate is difficult to control, and the temperature of the gas cylinder location needs to be detected in real time through a temperature control component to avoid dangerous accidents due to excessive temperature. The gas replenishment personnel need to monitor the temperature through the temperature control component in real time, which seriously increases the work pressure of the gas replenishment personnel; the existing heating method also uses a steam condensation heat release component to heat the bottom of the gas cylinder, but the gasification process of SF6 gas is from the middle and lower part of the gas cylinder to the bottom, and the low temperature area is mainly the middle and lower part and the bottom. The steam heating component only heats the bottom of the gas cylinder, and its effect is poor. The heating plate and the steam heating component are both in contact with the gas cylinder, and their heat exchange efficiency is poor. Summary of the invention

[0005] The present invention provides a gas cylinder heating device, which can overcome certain or some defects of the prior art. According to a gas cylinder heating device of the present invention, it includes a heating device body, a placement cavity for placing the gas cylinder is formed inside the heating device body, the placement cavity opens upward, an air curtain is provided at the top opening of the placement cavity, a placement plate parallel to the bottom wall of the placement cavity is provided in the placement cavity, a semi-enclosed heating area is formed between the air curtain and the placement plate, and a heating component for heating the gas cylinder is provided in the heating area.

[0006] Through the present invention, an air curtain is provided at the top opening of the placement cavity, and the air curtain forms a protective layer during the heating process to reduce the diffusion of heat and reduce energy loss; the heating component is arranged in a semi-enclosed heating area to further reduce heat loss and improve the heating efficiency of the gas cylinder; the heating component is different from the traditional heating plate and steam heating component, and its heating method is improved to a combination of water bath heating and steam heating, and its heating effect is better.

[0007] Preferably, two rows of positioning holes are evenly formed at the placement plate along its length direction, and two rows of positioning holes are placed in sequence to form two gas cylinders, the inner walls of the positioning holes are in close contact with the outer walls of the gas cylinders, and a vertically arranged first partition plate is provided at the symmetry plane between the two gas cylinders, and the first partition plate is vertically arranged above the placement plate, and a plurality of vertically arranged second partition plates are provided at the symmetry plane between the gas cylinders, and the second partition plates are perpendicular to the first partition plate and the placement plate and are arranged above the placement plate, the first partition plate and the second partition plate divide the placement cavity into a plurality of completely symmetrical heating blocks, the heating blocks constitute a heating area, and the heating blocks are each provided with a heating component.

[0008] Through the present invention, two rows of positioning holes are evenly formed along the length direction of the placement plate, which improves the stability of the gas cylinder during the heating process and prevents the gas cylinder from rolling or shifting; since not every heating block needs to be heated, the gas cylinder loaded with SF6 needs to be heated during the inflation process, while the gas cylinder loaded with nitrogen does not need to be heated, and the design of the first partition plate and the second partition plate helps to separate the various heating blocks, reduce the mutual interference between the heating blocks, and thus improve the stability of the system; the design of multiple heating blocks allows different heating strategies to be used in different inflation occasions, which is specifically manifested in that the gas ratio of SF6 and nitrogen can be adjusted as needed, and then whether the heating block is heated is adjusted according to the gas ratio of SF6 and nitrogen, which has higher flexibility; the first partition plate and the second partition plate are both made of thermal insulation materials.

[0009] Preferably, a closed steam chamber is formed between the placement plate and the bottom wall of the placement chamber, and water and a heat source for heating the water to generate steam are placed in the steam chamber.

[0010] Through the present invention, the closed steam chamber can effectively reduce the loss of heat to the external environment, thereby improving the thermal efficiency of the entire device; the steam pressure in the closed space can be increased, which helps to improve the water heating speed and steam generation efficiency.

[0011] Preferably, condensed water is stored in the heating block, and the area between below the condensed water surface and the placement plate is the water bath heating zone, which is used to perform water bath heating on the middle and lower part of the gas cylinder; the area between above the condensed water surface and the gas curtain is the steam heating zone, which is used to perform steam heating on the middle and upper part of the gas cylinder; the water bath heating zone and the steam heating zone together constitute the heating block.

[0012] Through the present invention, the heating area is divided into a water bath heating area and a steam heating area, so that the entire gas cylinder can be heated, the heating is more uniform, and the heating efficiency is improved; the water bath heating area has a large specific heat capacity of water and the temperature changes slowly, so there will be no danger of sudden temperature rise; the steam heating area can ensure the safety of the device by controlling the pressure and flow of steam, thereby increasing the safety of the device: uniform heating helps to improve the heating effect and reduce the deformation of the gas cylinder caused by uneven heating during the heating process.

[0013] Preferably, the heating component includes a plurality of steam nozzles arranged above the placement plate, the steam nozzles are used to spray steam, the steam nozzles include a nozzle body, and an air inlet and an air outlet are respectively provided at both ends of the nozzle body, the gas discharge direction of the air outlet points to the upper half of the gas cylinder, and the air outlet is located in the steam heating zone; the heating component also includes a plurality of one-way valve reflux devices for returning condensed water to the steam chamber, the one-way valve reflux devices are embedded in the placement plate and unidirectionally connect the heating block and the steam chamber; each heating block includes a one-way valve reflux device and at least one steam nozzle.

[0014] Through the present invention, steam is generated in the steam chamber, and the steam enters from the air inlet of the steam nozzle, passes through the nozzle body, and is ejected from the air outlet. The gas discharge direction points to the upper part of the gas cylinder, and the steam fills the steam heating zone to heat the upper part of the gas cylinder. The steam is liquefied when it is cooled, and condensed water flows to the bottom of the gas cylinder to form a water bath heating zone. The condensed water itself has a certain temperature, and the temperature is higher than the temperature of the gas cylinder. The condensed water gathers and submerges the bottom of the gas cylinder and heats the bottom of the gas cylinder in a water bath at the same time. Water is a heat conduction medium with large specific heat capacity and high conduction efficiency. Its direct contact with the gas cylinder greatly improves the heat transfer efficiency. The one-way valve reflux device is provided with a connected pressure threshold. With the continuous ejection of steam, the condensed water gathers, and the heating block is heated. As the condensed water level increases, the pressure on the side of the one-way valve reflux device close to the heating block increases. When the pressure is greater than the threshold of the one-way valve reflux device, the condensed water in the heating block begins to reflux, and the liquid level remains constant. The steam chamber reheats the reflux water into steam, forming a stable cycle, thereby ensuring that the temperature and liquid level of the condensed water in the heating block are also relatively stable, that is, ensuring the stability of water bath heating. At the same time, the circulation of the liquid also ensures that steam can be continuously ejected. The combination of the two heating methods can better heat the gas cylinder; each heating block includes a one-way valve reflux device and at least one steam nozzle, and multiple steam nozzles can be provided to achieve rapid steam ejection, thereby further improving the heating efficiency.

[0015] Preferably, the one-way valve reflux device comprises a one-way valve body, and a switch for fully opening the one-way valve body channel is provided on the side of the one-way valve body.

[0016] Through the present invention, after the device is used, condensed water accumulates in the heating block. At this time, turning on the switch can fully open the channel of the one-way valve body to completely discharge the condensed water. In an emergency, if the steam chamber fails and the internal pressure is too high, the one-way valve body can be quickly opened completely by the switch to release the internal pressure of the steam chamber, thereby protecting the safety of the device and improving the overall safety of the device.

[0017] Preferably, the air curtain is provided with a steel ring for fixing the gas cylinder.

[0018] Through the present invention, the steel ring provides fixation for the gas cylinder, prevents the gas cylinder from shifting due to various factors during the heating process, and ensures the stability of the gas cylinder during the heating process.

[0019] Preferably, the steam nozzle further comprises an adjustment switch arranged on the side of the nozzle body, and the adjustment switch is used to adjust the steam size and the opening and closing of the steam nozzle.

[0020] Through the present invention, the regulating switch allows the operator to accurately control the flow rate of steam as needed, thereby realizing temperature control. The operator can quickly adjust the size of the steam, thereby improving the flexibility of operation; the regulating switch also controls whether the corresponding heating block is heated. When the regulating switch is turned on, the heating block is heated, and when the regulating switch is turned off, the heating block is not heated, that is, the heating block where the gas cylinder loaded with SF6 is placed is heated by turning on the regulating switch, and the heating block where the gas cylinder loaded with nitrogen is placed is not heated by turning off the regulating switch.

[0021] Preferably, a pressure-limiting valve is provided on the side of the steam chamber to prevent excessive pressure inside the steam chamber, and a protective cover is provided on the outer side of the pressure-limiting valve to prevent steam from spraying out and injuring people.

[0022] Through the present invention, the pressure limiting valve can prevent the internal pressure of the steam chamber from exceeding the safety threshold, thereby avoiding equipment damage or explosion risks caused by excessive pressure, and the protective cover protects the operator from direct harm from high-temperature steam, reducing the potential risk of injury to the operator.

[0023] A multifunctional SF6 charging equipment includes a device body, the device body includes a movable carrier, and a carrying area for carrying a gas cylinder is formed on the carrier; a heating device for heating the gas cylinder is also arranged on the carrier, and the heating device includes a gas cylinder heating device as described in any one of claims 1-9.

[0024] Through the present invention, the operator moves the device body to the work site, connects to the heat source power supply, and then opens or closes the regulating switch according to the type of gas cylinder placed in the heating block. The regulating switch of the gas cylinder loaded with SF6 is opened, and the regulating switch of the gas cylinder loaded with nitrogen is closed. The gas cylinder is heated by the gas cylinder heating device, and a good heating effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the multifunctional SF6 charging equipment in Example 1; Figure 2 This is a schematic diagram of the electromagnetic lifting assembly in Example 2; Figure 3 It is a schematic diagram of the main body of the electromagnetic component in Example 2; Figure 4 It is a schematic diagram of a part B of the electromagnetic component body in Example 2; Figure 5 It is a schematic cross-sectional view of a part B of the main body of the electromagnetic component in Example 2; Figure 6 This is a schematic diagram of the power supply circuit in Example 2; Figure 7 This is a schematic diagram of the electromagnetic component body and the gas cylinder in Example 2; Figure 8 It is a schematic diagram of local A in Example 2; Fig. 9 It is a schematic diagram of the main body of the electromagnetic component in Example 2; Fig.10 It is a schematic diagram of the main body of the electromagnetic component in Example 2; Fig.11 is a cross-sectional schematic diagram of the first switch element in Embodiment 2; Fig.12 is a schematic cross-sectional view of the main body of the electromagnetic component in Example 2; Fig.13 This is an exploded schematic diagram of the first switch member in Example 2; Fig.14 This is a schematic diagram of the plastic sleeve in Example 2; Fig.15 is a schematic diagram of the metal electrode in Example 2; Fig.16 It is a cross-sectional schematic diagram of the gas cylinder heating device and the multifunctional SF6 charging equipment in Example 3; Fig.17 Schematic diagram of the partition plate in Example 3; Fig.18 This is a schematic diagram of the placement plate and the heating assembly in Example 3; Fig.19 This is a schematic diagram of the steam nozzle in Example 3; Fig. 20 This is a schematic diagram of a one-way valve reflux device in Example 3; Fig.21 is a schematic diagram of the air curtain in Example 3; Fig. 22 This is a schematic diagram of the pressure limiting valve and protective cover in Example 3; Fig.23It is a schematic diagram of the gas cylinder heating device and the multifunctional SF6 charging equipment in Example 3; Fig.24 It is a schematic diagram of local D in Example 3; Fig.25 This is a schematic diagram of the heat source in Example 3. DETAILED DESCRIPTION

[0026] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0027] Example 1 like Figure 1 As shown, this embodiment provides a multifunctional SF6 charging equipment, which includes a device body 1010, and the device body 1010 includes a movable carrier 1011, and a carrying area 1012 for carrying a gas cylinder 1013 is formed at the carrier 1011; a lifting mechanism 1014 for lifting the gas cylinder 1013 is arranged at the carrier 1011; and a heating device 1015 for heating the gas cylinder 1013 is also arranged at the carrier 1011.

[0028] Through this embodiment, the operator moves the device body 1010 to the work site, ensures that the bearing area 1012 is in a stable state, and uses the electromagnetic lifting assembly 2010 in the lifting mechanism 1014 to lift the gas cylinder 1013. Under the action of the lifting mechanism 1014, the gas cylinder 1013 is moved to the specified position. The integration of the lifting mechanism 1014 makes the lifting process of the gas cylinder 1013 faster and more efficient; the design of the lifting mechanism 1014 ensures the safety during the lifting process and reduces the risk of accidents that may be caused by manual operation of the hook; the design of the lifting mechanism 1014 reduces the work intensity of the operator and improves the comfort of the operation; after the gas cylinder is lifted, it is inflated, and the gas cylinder 1013 is heated by the gas cylinder heating device 2020 in the heating equipment 1015, which has a good heating effect.

[0029] Example 2 This embodiment provides a lifting mechanism 1014 that can be used in Embodiment 1, such as Figure 2-15 As shown, it includes an electromagnetic lifting assembly 2010, the electromagnetic lifting assembly 2010 includes a lifting assembly body 100, the lifting assembly body 100 includes a first electromagnetic component 110 and a second electromagnetic component 120 for cooperating with each other; the first electromagnetic component 110 includes a first electromagnetic component body 111, and the second electromagnetic component 120 includes a second electromagnetic component body 121; A first electromagnet 210 is disposed inside the first electromagnetic member 110, and a second electromagnet 220 is disposed inside the second electromagnetic member 120. The first electromagnet 210 and the second electromagnet 220 are used to connect to a power supply circuit 240 through a main switch member 230 to generate magnetic force. A first hoisting mating surface 112 is formed on one side of the first electromagnetic component body 111, and a second hoisting mating surface 122 is formed on one side of the second electromagnetic component body 121; the first hoisting mating surface 112 and the second hoisting mating surface 122 are used to form a hoisting magnetic attraction working surface 130 with the side of the object to be hoisted 140 at the same height, and the hoisting magnetic attraction working surface 130 has a contour corresponding to the side shape of the object to be hoisted 140; a triggering member 310 is provided at the first hoisting mating surface 112, and a first switch member 320 for being triggered by the triggering member 310 is provided at the second hoisting mating surface 122; A safety chain 410 is disposed on the upper portion of the first electromagnetic component body 111, and a buckle connection portion 420 for buckling with the safety chain 410 is disposed on the upper portion of the second electromagnetic component body 121; the safety chain 410 is buckled and connected to the buckle connection portion 420 after being matched with a safety hanging point 430 located at the object to be hoisted 140, and a second switch 510 for being triggered by the safety chain 410 is disposed at the buckle connection portion 420; The first switch element 320 , the second switch element 510 and the main switch element 230 are connected in series to the power supply circuit 240 .

[0030] Through this embodiment, the electromagnetic lifting assembly 2010 is used to replace the traditional hook for lifting, which has higher safety; the first electromagnet 210 and the second electromagnet 220 are respectively arranged inside the first electromagnetic part 110 and the second electromagnetic part 120, which can generate magnetic force for lifting by connecting to the power supply circuit 240, which greatly reduces the safety risks caused by the hook falling off or breaking, and has higher safety; the shape design of the dedicated lifting magnetic suction working surface 130 can ensure that the lifting magnetic suction working surface 130 and the surface of the object to be lifted 140 are in contact during the lifting process, thereby improving the stability of the lifting; the safety chain 410 is matched with the safety hanging point 430 located at the object to be lifted 140 and is connected to the buckle connection part 420 after being buckled, which not only increases safety, but also provides double protection. The operator must put the safety chain before lifting. After the safety chain 410 passes through the safety hanging point 430 and is installed in place to trigger the second switch 510, the first electromagnet 210 and the second electromagnet 220 can be normally energized. During the lifting process, the safety chain 410 can also prevent the first electromagnet 210 and the second electromagnet 220 from falling due to accidental failure, further improving safety; a trigger member 310 is provided at the first lifting matching surface 112 and a first switch member 320 for being triggered by the trigger member 310 is provided at the second lifting matching surface 122. The trigger member 310 and the first switch member 320 cooperate to further provide a layer of safety protection. Only after the operator installs the first electromagnetic member body 111 and the second electromagnetic member body 121 in place before lifting, the first electromagnet 210 and the second electromagnet 220 can be normally energized, further improving safety.

[0031] In this embodiment, the first hoisting mating surface 112 includes a first mating surface 610 and a second mating surface 620 respectively formed at both ends of the one side of the first electromagnetic component body 111, and the second hoisting mating surface 122 includes a third mating surface 630 and a fourth mating surface 640 respectively formed at both ends of the one side of the second electromagnetic component body 121; the first mating surface 610 is used to form a mating with the third mating surface 630, and the second mating surface 620 is used to form a mating with the fourth mating surface 640; A first docking structure 650 is disposed at at least one of the first mating surface 610 and the second mating surface 620, and a second docking structure 660 is disposed correspondingly at at least one of the third mating surface 630 and the fourth mating surface 640; the first docking structure 650 and the second docking structure 660 together form a safety docking component 670; The trigger member 310 is formed at the first docking structure 650 , and the first switch member 320 is formed at the second docking structure 660 .

[0032] Through this embodiment, the first lifting mating surface 112 and the second lifting mating surface 122 each have mating surfaces at both ends. The design of multiple larger contact surfaces between the first electromagnetic component 110 and the second electromagnetic component 120 can enhance the accuracy and speed of the alignment of the first electromagnetic component 110 and the second electromagnetic component 120 in the lifting preparation stage; the design of multiple first docking structures 650 and the second docking structure 660 can further improve the accuracy of the alignment of the first electromagnetic component 110 and the second electromagnetic component 120 in the lifting preparation stage. Only after the multiple first docking structures 650 and the second docking structures 660 are accurately aligned, the first electromagnetic component 110 and the second electromagnetic component 120 can reach the predetermined pre-lifting state, thereby preventing the possibility of misoperation and irregular operation.

[0033] In this embodiment, the first docking structure 650 adopts an insertion rod structure, and the second docking structure 660 adopts a slot structure; the insertion rod structure includes a guide rod 710 arranged on the first contact surface 610 and the fourth contact surface 640; the slot structure includes a guide hole 720 arranged on the second contact surface 620 and the third contact surface 630; the guide rod 710 and the guide hole 720 are clearance-matched.

[0034] According to the present embodiment, the hoisting point is usually higher. For the sake of safety, the traditional hook hoisting requires the participation of multiple people to install the hook to the predetermined hoisting position during the hoisting preparation stage. In the present invention, the structural design of the first docking structure 650 and the second docking structure 660 greatly reduces the work in the preparation stage. Only one person can easily complete the pre-hoisting preparation, insert the guide rod 710 into the guide hole 720, complete the docking of the first docking structure 650 and the second docking structure 660, so that the first electromagnetic component 110 and the second electromagnetic component 120 reach the predetermined hoisting state; the guide rod 710 and the guide hole 720 are clearance-matched. This design can accommodate the slight misalignment between the first electromagnetic component 110 and the second electromagnetic component 120, avoiding damage caused by excessive stress during use. At the same time, since the clearance fit does not require a tight tolerance, the guide rod 710 can be more easily installed in the guide hole 720, which is also more convenient when maintenance or replacement is required. When there is a gap between the guide rod 710 and the guide hole 720, even in the presence of contaminants, it is not easy to get stuck.

[0035] In this embodiment, the first switch component 320 includes two metal electrodes 810 arranged inside the guide hole 720, and the two metal electrodes 810 are connected in series to the power supply circuit 240; the trigger component 310 includes a metal conductive block 820 formed at the end of the guide rod 710, and the metal conductive block 820 is used to cooperate with the two metal electrodes 810.

[0036] Through this embodiment, when the guide rod 710 is inserted into the guide hole 720, the metal conductive block 820 automatically cooperates with the metal electrode 810 to trigger the first switch 320, thereby simplifying the operation process and making the operation simpler; the cooperation between the metal electrode and the conductive block is designed to complete the circuit connection only after full alignment and insertion, which increases the safety of operation and reduces circuit errors or equipment failures caused by misoperation; the metal electrode 810 is designed inside the guide hole 720, so that the overall structure is more compact and saves space, and the structure of the metal electrode 810 and the metal conductive block 820 is relatively simple, easy to inspect and maintain, and easy to discover and solve problems.

[0037] In this embodiment, an electrical installation cavity 830 is formed inside the second electromagnetic component 120, and two first electrode plug holes 850 are formed on the bottom wall of the guide hole 720 to connect the guide hole cavity 840 and the electrical installation cavity 830; The first switch member 320 further includes a plastic sleeve 860 for carrying the two metal electrodes 810, the outer wall of the plastic sleeve 860 is threadedly matched with the inner wall of the guide hole 710; an insertion cavity 870 for inserting the guide rod 710 is formed inside the plastic sleeve 860, and one end of the insertion cavity 870 that matches with the bottom wall 850 of the guide hole is closed to form an insertion cavity bottom plate 880, and the insertion cavity bottom plate 880 forms two second electrode plug holes 890 corresponding to the two first electrode plug holes 850; The metal electrode 810 includes an electrode main body 811, and a metal electrode mounting groove 812 is radially formed on the side wall of the insertion cavity 870 for plugging and mating with the electrode main body 811; an electrode insertion portion 910 is formed at the electrode main body 811 corresponding to the second electrode socket 890, and the electrode insertion portion 910 is used to be inserted into the electrical installation cavity 830 through the second electrode socket 890 and the first electrode socket 850.

[0038] Through this embodiment, the electrical installation cavity 830 formed inside the second electromagnetic component 120 provides a centralized space for installing and fixing electrical components, making the overall structure more concise; the plastic sleeve 860 is used to carry the metal electrode 810, and the outer wall of the plastic sleeve 860 is threadedly connected to the inner wall of the guide hole 720 and is provided with a metal electrode installation groove 812. This design provides protection for the metal electrode 810 and ensures that the metal electrode 810 will not shift during use; the design of the insertion cavity bottom plate 880 ensures that the guide rod 710 inserted into the cavity will not continue to go deeper after reaching a certain depth, thereby playing a limiting role; the metal electrode 810 simultaneously passes through the first electrode socket 850 and the second electrode socket 890 and is inserted into the electrical installation cavity 830. This design can provide a fixation between the plastic sleeve 860 and the guide hole 710 to prevent the plastic sleeve 860 and the guide hole 710 from rotating during use.

[0039] In this embodiment, the electrode body 811 includes a base portion 813 , and one side of the base portion 813 used to cooperate with the metal conductive block 820 is formed by stamping to form a contact portion 814 that arches toward the inner cavity of the plastic sleeve 860 .

[0040] Through this embodiment, the design of the contact portion 814 arching toward the inner cavity of the plastic sleeve 860 can ensure better contact pressure with the metal conductive block 820, thereby improving the reliability of contact conduction. At the same time, the arched contact portion 814 helps to stabilize the position of the metal conductive block 820 and prevent accidental power failure due to vibration or other external forces. Due to the existence of the contact portion 814, the metal conductive block 820 can be prevented from directly hitting the inner wall of the plastic sleeve 860 to a certain extent, thereby protecting the inner wall from damage. If the contact portion 814 is worn or damaged, it can be easily replaced because it is designed as an independent component. The contact portion 814 formed by stamping has good wear resistance and can maintain a good contact state during long-term use. The stamping process of the contact portion 814 is relatively simple and easy to mass produce, which can reduce manufacturing costs.

[0041] In this embodiment, one side of the base portion 813 used to cooperate with the metal electrode mounting groove 812 is bent at both ends in the width direction to form a plug-in portion 815, and the plug-in portion 815 and the base portion 813 together form a C-shaped plug-in area 816. A T-shaped track 817 for cooperating with the C-shaped plug-in area 816 is formed at the bottom wall of the metal electrode mounting groove 812.

[0042] Through this embodiment, the design of the T-shaped track 817 makes the metal electrode 810 more firmly fixed, does not shift during installation and use, and helps to accurately guide the plug-in portion 815, thereby improving the installation accuracy and ensuring the correct installation of the metal electrode 810; the bent plug-in portion 815 increases the mechanical strength of the structure and improves the mechanical strength of the electrode; the shape design of the plug-in area 816 and the T-shaped track 817 simplifies the installation process, making the installation process of the metal electrode 810 simpler and reducing the installation time and difficulty.

[0043] In this embodiment, a first docking structure 650 is provided at the first mating surface 610 and the fourth mating surface 640, and a second docking structure 660 is correspondingly provided at the second mating surface 620 and the third mating surface 630; the two first switch elements 320 formed at the second mating surface 620 and the third mating surface 630 are connected in parallel and then connected in series with the second switch element 510 and the main switch element 230 to the power supply circuit 240.

[0044] Through this embodiment, the two first switch components 320 are connected in parallel to improve the reliability of the circuit. When one switch component has a problem, the other one can still work, ensuring the continuity of the circuit and improving the safety of the lifting. After the two first switch components 320 are connected in parallel, they are connected in series with the second switch component 510 and the main switch component 230 to the power supply circuit 240. This design provides triple safety protection. The circuit will be connected only when the first switch component 320, the second switch component 510 and the main switch component 230 are all turned on, which greatly increases the safety of the lifting assembly.

[0045] In this embodiment, the hoisting assembly body 100 further includes a hanging point assembly 440 for detachably cooperating with the object to be hoisted 140 , and the hanging point assembly 440 is used to provide a safe hanging point 430 .

[0046] Through this embodiment, the design of the hanging point assembly 440 avoids directly setting the safety hanging point 430 on the object to be hoisted 140, thereby reducing damage to the object to be hoisted 140.

[0047] Example 3 This embodiment provides a heating device 1015 that can be used in Embodiment 1, such as Figure 16-25 As shown, it includes a gas cylinder heating device 2020, which includes a heating device body 1110. A placement cavity 1112 for placing a gas cylinder is formed inside the heating device body 1110. The placement cavity 1012 opens upward, and an air curtain 1113 is provided at the top opening of the placement cavity 1012. A placement plate 1114 parallel to the bottom wall of the placement cavity 1012 is provided in the placement cavity 1012. A semi-enclosed heating area 1210 is formed between the air curtain 1113 and the placement plate 1112. A heating component 1211 for heating the gas cylinder 1013 is provided in the heating area 1210.

[0048] According to the present embodiment, an air curtain 1113 is provided at the top opening of the placement cavity 1012, and the air curtain 1113 forms a protective layer during the heating process to reduce the diffusion of heat and reduce energy loss; the heating component 1211 is arranged in a semi-enclosed heating area 1210 to further reduce heat loss and improve the heating efficiency of the gas cylinder 1013; the heating component 1211 is different from the traditional heating plate and steam heating component, and its heating method is improved to a combination of water bath heating and steam heating, and its heating effect is better.

[0049] In this embodiment, two rows of positioning holes 1115 are evenly formed along the length direction of the placement plate 1114, and the two rows of positioning holes 1115 are placed in sequence to form two gas cylinders 1013. The inner walls of the positioning holes 1115 are in close contact with the outer walls of the gas cylinders 1013, and a vertically arranged first partition plate 1116 is provided at the symmetry plane between the two gas cylinders 1013. The first partition plate 1116 is vertically arranged above the placement plate 1114, and a plurality of vertically arranged second partition plates 1117 are provided at the symmetry plane between the gas cylinders 1013. The second partition plate 1117 is perpendicular to the first partition plate 1116 and the placement plate 1114 and is arranged above the placement plate 1114. The first partition plate 1116 and the second partition plate 1117 divide the placement cavity 1012 into a plurality of completely symmetrical heating blocks 1118. The heating blocks 1118 constitute a heating area 1210, and the heating blocks 1118 are each provided with a heating assembly 1211.

[0050] Through this embodiment, two rows of positioning holes 1115 are evenly formed along the length direction of the placement plate 1114, which improves the stability of the gas cylinder 1013 during the heating process and prevents the gas cylinder 1013 from rolling or shifting; since not every heating block 1118 needs to be heated, the gas cylinder 1013 loaded with SF6 needs to be heated during the inflation process, while the gas cylinder 1013 loaded with nitrogen does not need to be heated, and the design of the first partition plate 1116 and the second partition plate 1117 helps to separate the various heating blocks 1118 and reduce the mutual interference between the heating blocks 1118, thereby improving the stability of the system; the design of multiple heating blocks 1118 allows different heating strategies to be used in different inflation occasions, which is specifically manifested in that the gas ratio of SF6 and nitrogen can be adjusted as needed, and then whether the heating block 1118 is heated is adjusted according to the gas ratio of SF6 and nitrogen, which has higher flexibility; the first partition plate 1116 and the second partition plate 1117 are both made of insulating materials.

[0051] In this embodiment, a sealed steam chamber 1310 is formed between the placement plate 1114 and the bottom wall of the placement chamber 1012 , and water and a heat source 1320 for heating the water to generate steam are placed in the steam chamber 1310 .

[0052] Through this embodiment, the closed steam chamber 1310 can effectively reduce the loss of heat to the external environment, thereby improving the thermal efficiency of the entire device; the steam pressure in the closed space can be increased, which helps to improve the water heating speed and steam generation efficiency.

[0053] In this embodiment, condensed water is stored in the heating block 1118, and the area between below the condensed water liquid level 1330 and the placement plate 1114 is the water bath heating zone 1340, and the water bath heating zone 1340 is used to perform water bath heating on the middle and lower part of the gas cylinder 1013; the area between above the condensed water liquid level 1330 and the air curtain 1113 is the steam heating zone 1350, and the steam heating zone 1350 is used to perform steam heating on the middle and upper part of the gas cylinder 1013; the water bath heating zone 1340 and the steam heating zone 1350 together constitute the heating block 1118.

[0054] Through this embodiment, the heating block 1118 is divided into a water bath heating zone 1340 and a steam heating zone 1350, so that the entire gas cylinder 1013 can be heated, making the heating more uniform, which helps to improve the heating efficiency; the water bath heating zone 1340 has a large specific heat capacity of water and the temperature changes slowly, so there will be no sudden temperature rise to cause danger, and the steam heating zone 1350 can ensure the safety of the device by controlling the pressure and flow of steam, thereby increasing the safety of the device: uniform heating helps to improve the heating effect and reduce the deformation of the gas cylinder 1013 caused by uneven heating during the heating process.

[0055] In this embodiment, the heating component 1211 includes a plurality of steam nozzles 1410 arranged above the placement plate 1114, the steam nozzles 1410 are used to spray steam, and the steam nozzles 1410 include a nozzle body 1411, and an air inlet 1412 and an air outlet 1413 are respectively provided at both ends of the nozzle body 1411, and the gas discharge direction of the air outlet 1413 points to the upper half of the gas cylinder 1013, and the air outlet 1413 is located in the steam heating zone 1350; the heating component 1211 also includes a plurality of one-way valve reflux devices 1420 for returning condensed water to the steam chamber 1310, the one-way valve reflux devices 1420 are embedded in the placement plate 1114 and unidirectionally connect the heating block 1118 and the steam chamber 1310; each heating block 1118 includes a one-way valve reflux device 1420 and at least one steam nozzle 1410.

[0056] Through this embodiment, steam is generated in the steam chamber 1310, and the steam enters from the air inlet 1412 of the steam nozzle 1410, passes through the nozzle body 1411, and is ejected from the air outlet 1413. The gas discharge direction points to the upper part of the gas cylinder 1013, and the steam fills the steam heating area 1350 to heat the upper part of the gas cylinder 1013. The steam is liquefied when it is cooled, and condensed water flows to the bottom of the gas cylinder 1013 to form a water bath heating area 1340. The condensed water itself has a certain temperature, and the temperature is higher than the temperature of the gas cylinder 1013. The condensed water gathers and submerges the bottom of the gas cylinder 1013 and heats the bottom of the gas cylinder 1013 in a water bath. Water is a heat conduction medium with large specific heat capacity and high conduction efficiency. Its direct contact with the gas cylinder 1013 greatly improves the heat transfer efficiency. The one-way valve reflux device 1420 is provided with a connected pressure threshold. As the steam continues to be ejected, the condensed water gathers, and the heating The condensed water level 1330 in the hot block 1118 increases, and the pressure on the side of the one-way valve reflux device 1420 close to the heating block 1118 increases. When the pressure is greater than the threshold of the one-way valve reflux device 1420, the condensed water in the heating block 1118 begins to reflux, and the liquid level remains constant. The steam chamber 1310 reheats the reflux water into steam, forming a stable cycle, thereby ensuring that the temperature and liquid level of the condensed water in the heating block 1118 are also relatively stable, that is, ensuring the stability of the water bath heating. At the same time, the circulation of the liquid also ensures that the steam can be continuously ejected. The combination of the two heating methods can better heat the gas cylinder 1013; each heating block 1118 includes a one-way valve reflux device 1420 and at least one steam nozzle 1410, and multiple steam nozzles 1410 can be provided to achieve rapid steam ejection, thereby further improving the heating efficiency.

[0057] In this embodiment, the one-way valve reflux device 1420 includes a one-way valve body 1421 , and a switch 1422 for fully opening the channel of the one-way valve body 1421 is provided on the side of the one-way valve body 1421 .

[0058] Through this embodiment, after the device is used, condensed water accumulates in the heating block 1118. At this time, opening the switch 1422 can fully open the channel of the one-way valve body 1421 to completely discharge the condensed water. In an emergency, if the steam chamber 1310 fails and the internal pressure is too high, the one-way valve body 1421 can be fully opened quickly through the switch 1422 to release the internal pressure of the steam chamber 1310, thereby protecting the safety of the device and improving the overall safety of the device.

[0059] In this embodiment, a steel ring 1510 for fixing the gas cylinder 1013 is provided on the air curtain 1113 .

[0060] Through this embodiment, the steel ring 1510 provides fixation for the gas cylinder 1013, prevents the gas cylinder 1013 from shifting due to various factors during the heating process, and ensures the stability of the gas cylinder 1013 during the heating process.

[0061] In this embodiment, the steam spray head 1410 further includes an adjustment switch 1414 disposed on the side of the spray head body 1411 , and the adjustment switch 1414 is used to adjust the steam volume and the opening and closing of the steam spray head 1410 .

[0062] Through this embodiment, the regulating switch 1414 allows the operator to accurately control the flow rate of steam as needed, thereby achieving temperature control. The operator can quickly adjust the size of the steam to improve the flexibility of operation; the regulating switch 1414 also controls whether the corresponding heating block 1118 is heated. When the regulating switch 1414 is turned on, the heating block 1118 is heated, and when the regulating switch 1414 is turned off, the heating block 1118 is not heated, that is, the heating block 1118 where the gas cylinder 1013 loaded with SF6 is placed turns on the regulating switch 1414 for heating, and the heating block 1118 where the gas cylinder 1013 loaded with nitrogen is placed turns off the regulating switch 1414 for no heating.

[0063] In this embodiment, a pressure limiting valve 1610 is provided on the side of the steam chamber 1310 to prevent excessive pressure inside the steam chamber 1310, and a protective cover 1620 is provided on the outer side of the pressure limiting valve 1610 to prevent steam from spraying out and injuring people.

[0064] Through this embodiment, the pressure limiting valve 1610 can prevent the internal pressure of the steam chamber 1310 from exceeding the safety threshold, thereby avoiding equipment damage or explosion risks caused by excessive pressure. The protective cover 1620 protects the operator from direct harm from high-temperature steam, reducing the potential risk of injury to the operator.

[0065] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0066] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A gas cylinder heating device, characterized in that: The invention comprises a heating device body (1110), wherein a placement cavity (1012) for placing a gas cylinder (1013) is formed inside the heating device body (1110), the placement cavity (1012) is opened upward, an air curtain (1113) for isolating steam is provided at the top opening of the placement cavity (1012), a placement plate (1114) parallel to the bottom wall of the placement cavity (1012) is provided in the placement cavity (1012), a semi-enclosed heating area (1210) is formed between the air curtain (1113) and the placement plate (1114), and a heating component (1211) for heating the gas cylinder (1013) is provided in the heating area (1210).

2. A gas cylinder heating device according to claim 1, characterized in that: Two rows of positioning holes (1115) are evenly formed along the length direction of the placement plate (1114). The two rows of positioning holes (1115) are placed in sequence to form two gas cylinders (1013). The inner walls of the positioning holes (1115) are in close contact with the outer walls of the gas cylinders (1013). A vertically arranged first partition plate (1116) is provided at the symmetric plane between the two gas cylinders (1013). The first partition plate (1116) is vertically arranged above the placement plate (1114) and is at the symmetric plane between the gas cylinders (1013). A plurality of second partition plates (1117) are arranged vertically. The second partition plates (1117) are arranged above the placement plate (1114) perpendicular to the first partition plate (1116) and the placement plate (1114). The first partition plate (1116) and the second partition plate (1117) divide the placement cavity (1012) into a plurality of completely symmetrical heating blocks (1118). The heating blocks (1118) form a heating area (1210). The heating blocks (1118) are all provided with a heating assembly (1211).

3. A gas cylinder heating device according to claim 1, characterized in that: A sealed steam chamber (1310) is formed between the placement plate (1114) and the bottom wall of the placement chamber (1012); water and a heat source (1320) for heating the water to generate steam are placed in the steam chamber (1310).

4. A dual heating device for gas cylinders according to claim 2, characterized in that: Condensed water is stored in the heating block (1118); the area between below the condensed water liquid level (1330) and the placement plate (1114) is a water bath heating zone (1340), and the water bath heating zone (1340) is used to perform water bath heating on the middle and lower parts of the gas cylinder (1013); the area between above the condensed water liquid level (1330) and the air curtain (1113) is a steam heating zone (1350), and the steam heating zone (1350) is used to perform steam heating on the middle and upper parts of the gas cylinder (1013); the water bath heating zone (1340) and the steam heating zone (1350) together constitute the heating block (1118).

5. A gas cylinder heating device according to claim 1, characterized in that: The heating component (1211) comprises a plurality of steam nozzles (1410) arranged above the placement plate (1114), the steam nozzles (1410) being used to spray steam, the steam nozzles (1410) comprising a nozzle body (1411), the nozzle body (1411) being provided with an air inlet (1412) and an air outlet (1413) at both ends, the gas discharge direction of the air outlet (1413) being directed toward the upper half of the gas cylinder (1013); the heating component (1211) further comprises a plurality of one-way valve reflux devices (1420) for returning condensed water to the steam chamber (1310), the one-way valve reflux devices (1420) being embedded in the placement plate (1114) and unidirectionally connecting the heating block (1118) and the steam chamber (1310); each heating block (1118) comprises a one-way valve reflux device (1420) and at least one steam nozzle (1410).

6. A gas cylinder heating device according to claim 5, characterized in that: The one-way valve reflux device (1420) comprises a one-way valve body (1421), and a switch (1422) for fully opening the channel of the one-way valve body (1421) is provided on the side of the one-way valve body (1421).

7. A gas cylinder heating device according to claim 1, characterized in that: The air curtain (1113) is provided with a steel ring (1510) for fixing the gas cylinder (1013).

8. A gas cylinder heating device according to claim 5, characterized in that: The steam spray head (1410) further comprises an adjustment switch (1414) arranged on the side of the spray head body (1411), and the adjustment switch (1414) is used to adjust the steam volume and the opening and closing of the steam spray head (1410).

9. A gas cylinder heating device according to claim 3, characterized in that: A pressure limiting valve (1610) is provided on the side of the steam chamber (1310) to prevent excessive pressure inside the steam chamber (1310), and a protective cover (1620) is provided on the outside of the pressure limiting valve (1610) to prevent steam from spraying out and injuring people.

10. A multifunctional SF6 charging equipment, comprising a device body (1010), the device body (1010) comprising a movable carrier (1011), a carrying area (1012) for carrying a gas cylinder (1013) being formed at the carrier (1011); a heating device (1015) for heating the gas cylinder (1013) is also arranged at the carrier (1011), the heating device (1015) comprising a gas cylinder heating device as described in any one of claims 1 to 9.

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