Pressure-regulated sf6 gas wireless density detection device

Abstract

This invention belongs to the field of gas density detection technology, specifically relating to a pressure-regulated wireless SF6 gas density detection device. It includes a detection chamber and an SF6 gas density detection mechanism. A pressure pipe is connected to the lower part of the detection chamber, and the pressure pipe is connected to an SF6 circuit breaker. The SF6 gas density detection mechanism includes a pressure plate, a sealing ring, a fixing plate, a pressure rod, a gear plate, and a shaft. The sealing ring is sleeved on the outside of the pressure plate and slidably connected to the inner wall of the detection chamber. The fixing plate is fixedly installed on the inner wall of the detection chamber and located above the pressure plate. Holes are provided in the middle of the fixing plate and at the top of the detection chamber. This device solves the problem that current SF6 gas density detection typically uses pressure detection, which requires a spring. Using springs can lead to reduced detection accuracy due to spring lifespan issues or increased costs due to frequent spring replacements.

Description

Technical Field

[0001] This invention belongs to the field of gas density detection technology, specifically relating to a pressure-regulated wireless density detection device for SF6 gas. Background Technology

[0002] SF6 gas is sulfur hexafluoride, a colorless, odorless, non-toxic, and non-flammable inert gas with excellent insulation and arc-quenching properties. It is widely used in high-voltage electrical equipment. High-density SF6 gas brings heat dissipation limitations, decomposition corrosion, and safety risks to electrical equipment, so its purity, sealing properties, and operating temperature must be strictly controlled.

[0003] Therefore, it is necessary to detect the density of SF6 gas using a gas density detection device. The core principles are mainly based on two methods: pressure change monitoring and temperature compensation. The pressure change monitoring principle uses intelligent sensors to measure changes in gas pressure and determine density changes. Such detection devices generally require springs; the density change is determined by the gas pressure and spring deformation. After prolonged use, the springs become fatigued, and their lifespan cannot be guaranteed. Therefore, frequent spring replacements or replacement of the detection equipment are necessary. The lifespan of the detection equipment is a critical issue. Furthermore, most gas detection devices have fixed peak values, and different electrical equipment uses different models of gas detection devices, limiting their usability. This phenomenon has become a problem that urgently needs to be solved by those in the field. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure-regulated wireless density detection device for SF6 gas to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pressure-regulated SF6 gas wireless density detection device, including a detection chamber and an SF6 gas density detection mechanism. A pressure pipe is connected to the lower part of the detection chamber, and the pressure pipe is connected to an SF6 circuit breaker. The SF6 gas density detection mechanism includes a pressure plate, a sealing ring, a fixing plate, a pressure rod, a gear disc, and a shaft. The sealing ring is sleeved on the outside of the pressure plate and slidably connected to the inner wall of the detection chamber. The fixing plate is fixedly installed on the inner wall of the detection chamber and located above the pressure plate. Holes are provided in the middle of the fixing plate and above the detection chamber. The pressure rod is disposed in the holes, and its bottom end is bearing-connected to the upper surface of the pressure plate. The shaft is fixedly installed on the inner wall of the detection chamber. Several toothed blocks are connected to one side of the pressure rod and mesh with the gear disc. The gear disc is sleeved on the outside of the shaft.

[0006] The present invention further illustrates that a plurality of contact blocks are fixed on one side of the toothed disc, a connecting rod is fixed on the inner wall of the detection cavity, and a swing block is sleeved on the outer side of the connecting rod. After the toothed disc rotates, the outer end of the contact block contacts the upper end of the swing block, and a counterweight cavity is fixed on the lower end of the swing block.

[0007] The present invention further describes that an intelligent sensor is provided at the upper end of the swing block, and the intelligent sensor is internally provided with a count sensing module, a density detection module, and a wireless transmission module; the count sensing module, the density detection module, and the wireless transmission module are electrically connected to each other; the count sensing module is used to detect the number of times the upper end of the swing block contacts the outer end of the contact block; the density detection module is used to determine whether the SF6 gas density value exceeds the standard based on the number of contacts; and the wireless transmission module is used to transmit a signal to the terminal when the SF6 gas density value exceeds the standard.

[0008] The present invention further illustrates that a plurality of the contact blocks are evenly distributed on one side of the toothed disk, and the lengths extending out of the edge of the toothed disk increase sequentially.

[0009] The present invention further illustrates that the inner wall of the detection cavity is connected to an inlet tube, and a plurality of counterweights are arranged inside the inlet tube; a through hole is provided in the middle of the counterweight cavity, and in the initial state, when the counterweights are pushed, the counterweights enter the through hole.

[0010] The present invention further illustrates that the inner wall of the through hole is provided with sliding holes at both the front and rear, and a limit rod is slidably connected in both sliding holes. The SF6 gas wireless density detection device is equipped with a magnetic suction rod; the two ends of the magnetic suction rod are positive and negative poles respectively, and the counterweight is magnetic, with the magnetic poles being negative.

[0011] The present invention further illustrates that the interior of the pneumatic rod is hollow, and a round rod is rotatably connected inside, with a cam fixed at the lower end of the round rod.

[0012] The present invention further illustrates that each of the toothed blocks has a slide rod fixed to its inner end, each of the pneumatic rods has a round hole on one side, and the slide rod is slidably connected in the round hole. Each of the slide rods has an arc-shaped block fixed to its inner end. After the cam rotates, it contacts the arc-shaped block, and the toothed block abuts against the toothed disc. Limiting blocks are provided at both the front and rear of the toothed disc, and the limiting blocks are fixed to the outside of the shaft. The distance between the two limiting blocks is greater than the thickness of the toothed disc.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention determines the gas pressure level by the contact between the touch block and the swing block, that is, it determines the density level of SF6 gas. It can accurately determine the density change, and the detection accuracy is high. The common method is to set a spring between the pressure plate and the upper part of the inner wall of the detection chamber. The lifespan of the spring is consumed after repeated deformation, which cannot guarantee the subsequent detection accuracy, and the replacement cost of the spring will also increase. However, the density detection method described above does not require the replacement of the internal structure of the detection device, can be used continuously, and has a significantly increased service life. Moreover, the structural cost is relatively low. It is applicable to SF6 gas density detection in various devices, improves the detection accuracy of SF6 gas density, and automates the detection without human intervention. As the density increases, the gas pressure gradually increases, and the reaction result after density detection is rapid, so that it can know whether the gas density exceeds the standard immediately.

[0014] The overall structure is relatively simple and the manufacturing cost is low. It can effectively detect SF6 circuit breakers or other equipment with different SF6 gas density tolerance limits, and has a wide range of applications. Its biggest advantage is that it does not require frequent replacement or maintenance of the internal structure of the detection device, which effectively saves maintenance costs and replacement costs of the detection device. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the detection cavity of the present invention;

[0018] Figure 3 This is an exploded view of the entire detection cavity of the present invention;

[0019] Figure 4 This is an exploded view of a portion of the internal structure of the detection cavity of the present invention;

[0020] Figure 5 This is a schematic diagram showing the positional relationship between the gear disk and the swing block of the present invention;

[0021] Figure 6 This is a schematic diagram of the internal structure of the inlet tube and the counterweight cavity of the present invention;

[0022] Figure 7 This is a schematic diagram of the internal structure of the pneumatic rod of the present invention;

[0023] Figure 8 This is a schematic diagram of Embodiment 1 of the present invention;

[0024] Figure 9 This is a schematic diagram of Embodiment 3 of the present invention;

[0025] Figure 10 This is a schematic diagram of Embodiment 4 of the present invention;

[0026] Figure 11 This is a schematic diagram of the meshing position of the tooth block and the toothed disc in Embodiment 5 of the present invention;

[0027] Figure 12 This is a schematic diagram showing the positional relationship between the touch block and the swing block in Embodiment 5 of the present invention;

[0028] In the diagram: 1. Detection chamber; 11. Air pressure plate; 12. Sealing ring; 13. Fixing plate; 14. Air pressure rod; 141. Tooth block; 142. Round rod; 143. Cam; 144. Arc block; 15. Toothed disc; 151. Contact block; 16. Shaft; 17. Connecting rod; 171. Swing block; 172. Counterweight chamber; 173. Limiting rod; 18. Inlet tube; 181. Counterweight block; 19. Magnetic suction rod; 2. Air pressure pipe. Detailed Implementation

[0029] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-12 The present invention provides a technical solution: a pressure-regulated SF6 gas wireless density detection device, including a detection chamber 1 and an SF6 gas density detection mechanism, wherein a pressure pipe 2 is connected to the lower part of the detection chamber 1, and an SF6 circuit breaker is connected to the pressure pipe 2.

[0031] The SF6 gas density detection mechanism includes a pressure plate 11, a sealing ring 12, a fixing plate 13, a pressure rod 14, a gear disc 15, and a shaft 16. The sealing ring 12 is sleeved on the outside of the pressure plate 11 and slidably connected to the inner wall of the detection chamber 1. The fixing plate 13 is fixedly installed on the inner wall of the detection chamber 1 and is located above the pressure plate 11. Holes are provided in the middle of the fixing plate 13 and above the detection chamber 1. The pressure rod 14 is set in the hole and its bottom end is connected to the upper surface of the pressure plate 11 by a bearing. The shaft 16 is fixedly installed on the inner wall of the detection chamber 1. Several toothed blocks 141 are connected to one side of the pressure rod 14 and mesh with the gear disc 15. The gear disc 15 is sleeved on the outside of the shaft 16.

[0032] A number of contact blocks 151 are fixed on one side of the gear disk 15. A connecting rod 17 is fixed on the inner wall of the detection cavity 1. A swing block 171 is sleeved on the outer side of the connecting rod 17. After the gear disk 15 rotates, the outer end of the contact block 151 contacts the upper end of the swing block 171. A counterweight cavity 172 is fixed at the lower end of the swing block 171.

[0033] Gas inside the SF6 circuit breaker enters the detection chamber 1 through a pipeline. When the density of SF6 gas inside the SF6 circuit breaker increases, the gas pressure increases accordingly. The gas pressure pushes the pressure plate 11 to slide upward along the inner wall of the detection chamber 1, thereby driving the pressure rod 14 to move upward. The pressure rod 14 drives the toothed block 141 to rise, thereby engaging the toothed disc 15 to rotate. When the toothed disc 15 rotates on the shaft 16, it drives several contact blocks 151 to rotate around its center.

[0034] Example 1:

[0035] like Figure 8 As shown, when the contact block 151 contacts the swing block 171, as the air pressure increases, the gear disk 15 drives the contact block 151 to press the swing block 171. Then, the swing block 171 rotates on the connecting rod 17, and drives the counterweight cavity 172 to rotate around the center of the connecting rod 17, until the contact block 151 presses over the swing block 171. After the two separate from contact, the swing block 171 swings in the opposite direction, contacting several contact blocks 151 in sequence. This method provides high accuracy for detecting air pressure and density. The higher the density, the higher the air pressure, and the greater the amplitude of rotation of the gear disk 15. The contact between the contact block 151 and the swing block 171... Determining the gas pressure level indicates the density of SF6 gas, allowing for accurate detection of density changes and high precision. Currently, a common method involves placing a spring between the pressure plate 11 and the inner wall of the detection chamber 1. However, this spring's lifespan diminishes with repeated deformation, compromising subsequent detection accuracy and increasing replacement costs. The aforementioned density detection method eliminates the need for internal structural replacement, allowing for continuous use and significantly extending its lifespan. Furthermore, the structural cost is relatively low, and it is suitable for SF6 gas density detection in various equipment.

[0036] The upper end of the swing block 171 is equipped with a smart sensor, which contains a count sensing module, a density detection module and a wireless transmission module.

[0037] The number of times sensing module, density detection module and wireless transmission module are electrically connected to each other. The number of times sensing module is used to detect the number of times the upper end of the swing block 171 contacts the outer end of the touch block 151. The density detection module is used to determine whether the SF6 gas density value exceeds the standard based on the number of contacts. The wireless transmission module is used to transmit the signal to the terminal when the SF6 gas density value exceeds the standard.

[0038] Example 2:

[0039] After the first contact block 151 contacts and then separates from the swing block 171, the contact count sensing module detects that the contact count is one, and the SF6 gas density value at this time is set to... After the second contact block 151 contacts and then separates from the swing block 171, the number of contacts sensed by the count sensing module is two. At this time, the SF6 gas density value is set to... Similarly, if the number of contacts between the touch block 151 and the swing block 171 is six, and the SF6 gas density value exceeds the standard, the information will be transmitted to the terminal via the wireless transmission module to remind the testing personnel to maintain or repair the SF6 circuit breaker. This improves the accuracy of SF6 gas density detection and enables automated detection without human intervention. As the density increases, the gas pressure gradually increases, and the reaction result after density detection is rapid, allowing for immediate detection of whether the gas density exceeds the standard.

[0040] Furthermore, the program of the wireless transmission module can be modified to add functions, such as: setting a certain touch block 151 as an intermediate value, and sending a signal to the terminal when the touch block 151 and the swing block 171 make contact for the second time. At this time, the toothed disk 15 rotates in the opposite direction, the air pressure drops, and the density decreases. Whether the density increases or decreases, it can be detected, making the detection more comprehensive and greatly improving the safety.

[0041] Several contact blocks 151 are evenly distributed on one side of the toothed disk 15, and the lengths extending out of the edge of the toothed disk 15 increase sequentially.

[0042] Example 3:

[0043] like Figure 9 As shown, after the first contact block 151 contacts and then separates from the swing block 171, the swing block 171 contacts the second contact block 151. At this time, because the outer end of the second contact block 151 extends longer, the contact area between the two increases after contacting the swing block 171. The contact and separation process of the swing block 171 is prolonged, that is, the upper limit of the density value is controlled. Therefore, in Embodiment 2, the gas density value required when the number of contacts between the contact block 151 and the swing block 171 reaches six is ​​higher, which is suitable for some equipment with a higher upper limit for the density value of SF6 gas, and the application range of the detection device is increased.

[0044] The inner wall of the detection chamber 1 is connected to an inlet tube 18, and several counterweights 181 are arranged inside the inlet tube 18.

[0045] The counterweight cavity 172 has a through hole in the middle, and in the initial state, when the counterweight block 181 is pushed, the counterweight block 181 enters the through hole.

[0046] The inner wall of the through hole is provided with sliding holes at both the front and back, and the two sliding holes are slidably connected with limit rods 173. The SF6 gas wireless density detection device is equipped with a magnetic suction rod 19.

[0047] The magnetic rod 19 has positive and negative poles at both ends, and the counterweight 181 is magnetic with negative poles.

[0048] Example 4:

[0049] like Figure 10 As shown in Embodiment 3, for equipment with a higher upper limit for SF6 gas density, the counterweight 181 can be pushed into the through hole of the counterweight cavity 172 by the magnetic suction rod 19. The counterweight 181 first contacts the limiting rod 173, then presses past the limiting rod 173, and then the limiting rod 173 limits the counterweight 181, increasing the weight of the counterweight cavity 172. This results in a greater force required for the swing block 171 to swing, i.e., greater gas pressure and greater gas density. Therefore, it can be applied to large electrical equipment with higher SF6 gas density tolerance limits, improving the upper limit for density detection and further expanding the application range. When it is necessary to reduce the weight of the counterweight cavity 172, simply turn the magnetic suction rod 19 so that its positive end faces the counterweight 181, and remove the counterweight 181 from the counterweight cavity 172. The operation is convenient, and the upper limit for gas density detection is higher.

[0050] The pneumatic rod 14 is hollow inside and has a round rod 142 rotatably connected inside. A cam 143 is fixed to the lower end of the round rod 142.

[0051] Each toothed block 141 has a slide rod fixed to its inner end. Each pneumatic rod 14 has a round hole on one side, and the slide rod is slidably connected in the round hole. Each slide rod has an arc-shaped block 144 fixed to its inner end. After the cam 143 rotates, it contacts the arc-shaped block 144. The toothed block 141 presses against the toothed disc 15. Limiting blocks are provided at the front and rear of the toothed disc 15, and the limiting blocks are fixed to the outside of the shaft 16. The distance between the two limiting blocks is greater than the thickness of the toothed disc 15.

[0052] Example 5:

[0053] like Figure 11 and Figure 12As shown, when the wear of the touch block 151 and the swing block 171 is severe, or when the intelligent sensor is not sensitive to the touch block 151 and the swing block 171, the operator can first hold the pneumatic rod 14 and rotate the round rod 142 to drive the cam 143 to rotate. The cam 143 contacts and squeezes the arc block 144, pushing the toothed block 141 outward through the slide rod. The toothed block 141 fits tightly with the toothed disc 15. Then, rotate the pneumatic rod 14 to move the toothed disc 15 through the toothed block 141. The toothed disc 15 slides backward through the shaft 16 and is limited by the limiting block. After the toothed disc 15 moves, the contact area between the touch block 151 and the swing block 171 increases, thereby greatly improving the contact sensitivity and maximizing the use of the structure to greatly improve the service life of the SF6 gas wireless density detection device. When it is necessary to continue detection, the round rod 142 is reset, and then the pneumatic rod 14 is reset. The operation is simple.

[0054] The overall structure is relatively simple and the manufacturing cost is low. It can effectively detect SF6 circuit breakers or other equipment with different SF6 gas density tolerance limits, and has a wide range of applications. Its biggest advantage is that it does not require frequent replacement or maintenance of the internal structure of the detection device, which effectively saves maintenance costs and replacement costs of the detection device.

[0055] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure-regulated SF6 gas wireless density detection device, comprising a detection cavity (1) and an SF6 gas density detection mechanism, characterized in that: The lower side of the detection cavity (1) is connected with an air pressure pipe (2), and the air pressure pipe (2) is connected with an SF6 circuit breaker; The SF6 gas density detection mechanism comprises an air pressure plate (11), a sealing ring (12), a fixed plate (13), an air pressure rod (14), a toothed disc (15) and a shaft rod (16), the sealing ring (12) is sleeved on the outer side of the air pressure plate (11) and is slidingly connected to the inner wall of the detection cavity (1), the fixed plate (13) is fixedly installed on the inner wall of the detection cavity (1) and is located above the air pressure plate (11), the middle of the fixed plate (13) and the upper side of the detection cavity (1) are provided with holes, the air pressure rod (14) is arranged in the hole and is bearing-connected to the upper surface of the air pressure plate (11) at the bottom end, the shaft rod (16) is fixedly installed on the inner wall of the detection cavity (1), one side of the air pressure rod (14) is connected with a plurality of tooth blocks (141) and is engaged with the toothed disc (15), and the toothed disc (15) is sleeved on the outer side of the shaft rod (16). One side of the toothed disc (15) is fixedly provided with a plurality of touch blocks (151), the inner wall of the detection cavity (1) is fixedly provided with a connecting rod (17), the outer side of the connecting rod (17) is sleeved with an oscillating block (171), after the toothed disc (15) rotates, the outer end of the touch block (151) is in contact with the upper end of the oscillating block (171), and the lower end of the oscillating block (171) is fixedly provided with a counterweight cavity (172). The upper end of the oscillating block (171) is provided with an intelligent sensor, and the inside of the intelligent sensor is provided with a frequency sensing module, a density detection module and a wireless transmission module. The frequency sensing module, the density detection module and the wireless transmission module are electrically connected with each other, the frequency sensing module is used for the frequency of mutual contact between the upper end of the oscillating block (171) and the outer end of the touch block (151), the density detection module is used for judging whether the SF6 gas density value is over standard according to the contact frequency, and the wireless transmission module is used for transmitting a signal to a terminal when the SF6 gas density value is over standard. The wireless transmission module has the following functions: setting a certain touch block (151) as a middle value, sending a signal to the terminal when the touch block (151) is in contact with the oscillating block (171) for the second time, at this time, the toothed disc (15) rotates reversely, the air pressure decreases, and then the density decreases.

2. The pressure-regulated SF6 gas wireless density detection device according to claim 1, characterized in that: A plurality of the touch blocks (151) are uniformly distributed on one side of the toothed disc (15) and the lengths of the touch blocks (151) extending out of the edge of the toothed disc (15) increase in turn.

3. The pressure-regulated SF6 gas wireless density detection device according to claim 2, characterized in that: The inner wall of the detection cavity (1) is connected with an inlet pipe (18), and the inside of the inlet pipe (18) is provided with a plurality of counterweight blocks (181). The middle of the counterweight cavity (172) is provided with a through hole, and in the initial state, the counterweight block (181) is pushed into the through hole.

4. The pressure-regulated SF6 gas wireless density detection device according to claim 3, characterized in that: The inner wall of the through hole is provided with sliding holes at the front and back, and a limiting rod (173) is slidingly connected in each of the two sliding holes, and the SF6 gas wireless density detection device is provided with a magnetic attraction rod (19). The two ends of the magnetic attraction rod (19) are positive and negative poles respectively, the counterweight block (181) has magnetism and the magnetic pole is negative.

5. The pressure-regulated SF6 gas wireless density detection device according to claim 4, characterized in that: The inside of the air pressure rod (14) is hollow, and a round rod (142) is rotationally connected inside, and the lower end of the round rod (142) is fixed with a cam (143).

6. The pressure-regulated SF6 gas wireless density detection device according to claim 5, characterized in that: The inner end of the tooth block (141) is fixed with a sliding rod, one side of the air pressure rod (14) is provided with a round hole, and the sliding rod is slidingly connected in the round hole, the inner end of the sliding rod is fixed with an arc block (144), the cam (143) is in contact with the arc block (144) after being rotated, and the tooth block (141) abuts against the tooth disc (15), the front and back of the tooth disc (15) are provided with limiting blocks, the limiting blocks are fixed to the outer side of the shaft rod (16), and the distance between the two limiting blocks is greater than the thickness of the tooth disc (15).

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