SF6 recovery device capable of monitoring liquid level of recovery box

Abstract

The utility model discloses an SF6 recovery device capable of monitoring the liquid level of a recovery box, which belongs to the technical field of SF6 recovery and comprises a recovery component, and a monitoring component is mounted in the recovery component. A purification assembly for removing impurities and moisture in the SF6 gas is mounted at the upper end of the recovery assembly; the purification assembly comprises an impurity removal assembly and a locking assembly, the impurity removal assembly and the locking assembly are both connected with the recovery assembly, and the impurity removal assembly is connected with the locking assembly; and a detection assembly for detecting whether the SF6 gas is qualified or not is mounted on the recovery assembly. By means of the mode, the liquid level height of SF6 in the recycling box is monitored in real time through the liquid level meter, it is ensured that the liquid level height of SF6 in the recycling assembly is within the safety range, and safety risks caused by overfilling are prevented; the molecular sieve in the placing tank can be replaced; whether the purified SF6 gas meets the standard or not can be detected, and whether the molecular sieve in the placing tank needs to be replaced or not can be judged according to the detection result, so that the SF6 gas which does not meet the standard is prevented from being used.

Description

Technical Field

[0001] The utility model relates to the technical field of SF6 recovery, in particular to an SF6 recovery device for monitoring the liquid level of a recovery tank. Background Art

[0002] SF6 (sulfur hexafluoride) gas has excellent insulation performance and arc extinguishing performance, and is widely used in high-voltage electrical equipment, such as circuit breakers, transformers, and gas-insulated metal-enclosed switchgear. However, the used SF6 gas is not pure, containing some sulfur hexafluoride decomposition products, toxic gases or powders generated by reacting with moisture or electrodes and insulating materials inside the equipment. Therefore, it is necessary to purify the recovered sulfur hexafluoride so that it can be used again.

[0003] Chinese Patent CN217130948U discloses an SF6 gas recovery device, including an outer tank, an inner tank, a cooling component, a heating component, and a separation component. The upper parts of both the outer tank and the inner tank are open. The inner tank is placed in the outer tank, and a cavity is reserved between the outer tank and the inner tank. The cooling component and the heating component are both arranged in the cavity. The cooling component surrounds the side wall of the inner tank, the heating component is arranged at the bottom of the inner tank, and an SF6 liquid outlet pipe is provided at the bottom of the inner tank.

[0004] However, when this patent recovers SF6, it is unable to detect whether the separated SF6 meets the standards, and is unable to monitor the height of the SF6 liquid in the inner tank, unable to ensure that the height of the SF6 liquid in the inner tank is within a safe range, and there may be safety risks caused by overfilling.

[0005] Based on this, the utility model designs an SF6 recovery device for monitoring the liquid level of a recovery tank to solve the above problems. Summary of the Utility Model

[0006] In view of the above-mentioned drawbacks of the prior art, the utility model provides an SF6 recovery device for monitoring the liquid level of a recovery tank.

[0007] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0008] An SF6 recovery device for monitoring the liquid level of a recovery tank, including a recovery component, characterized in that:

[0009] A monitoring component is installed inside the recovery component;

[0010] A purification component for removing impurities and moisture in the SF6 gas is installed at the upper end of the recovery component;

[0011] The purification component includes an impurity removal component and a locking component. Both the impurity removal component and the locking component are connected to the recovery component, and the impurity removal component is connected to the locking component.

[0012] A detection component for detecting whether the SF6 gas is qualified is installed on the recovery component.

[0013] Furthermore, the recovery component includes a recovery box, a placement groove, a recovery air pipe, and an air outlet pipe. A placement groove is provided at the upper end of the recovery box, and a recovery air pipe and an air outlet pipe are fixedly connected to the left end of the recovery box.

[0014] Furthermore, the recovery box, the recovery air pipe, and the air outlet pipe are all connected to the detection component, the recovery box and the placement groove are both connected to the impurity removal component, and the recovery box is connected to the locking component.

[0015] Furthermore, the monitoring component includes a condensing pipe, a heating pipe, and a liquid level gauge. The condensing pipe and the liquid level gauge are both fixedly connected to the inner wall of the recovery box, and the heating pipe is fixedly connected to the lower inner wall of the recovery box.

[0016] Furthermore, the liquid level gauge is an ultrasonic liquid level gauge.

[0017] Furthermore, the impurity removal component includes a placement tank, a sealing door, a ventilation hole, a clamping block, and a through groove. The placement tank is filled with molecular sieve. The placement tank is embedded in the placement groove and is in sliding fit connection with the placement groove. Ventilation holes are provided on both the position of the placement tank at the recovery air pipe and the lower right inner wall. The left end of the sealing door is hinged to the front side of the right end of the placement tank. Two groups of clamping blocks are fixedly connected to the right rear side of the sealing door. Two groups of through grooves for inserting the clamping blocks are provided at the rear end of the placement tank.

[0018] Furthermore, both the clamping block and the through groove are connected to the locking component.

[0019] Furthermore, a handle is fixedly connected to the upper side of the right end of the placement tank.

[0020] Furthermore, the locking component includes an installation groove, a sliding rod, a spring, a connecting plate, a fixing plate, and an insertion block. Two installation grooves are provided at the right rear side of the recovery box. Sliding rods are slidably connected in the installation grooves. One end of each sliding rod is embedded in the through groove and is fixedly connected to the fixing plate. An insertion block is fixedly connected to the outer side of the rear end of the fixing plate. The insertion block is clamped with the clamping block. The other ends of the sliding rods are both fixedly connected to the connecting plate. Springs are sleeved on the sliding rods, and the two ends of each spring are respectively fixedly connected to the inner wall of the installation groove and the sliding rod.

[0021] Furthermore, the detection component includes a square plate, an air pump, an air extraction pipe, a gas detector, an exhaust pipe, a three-way valve, a control valve, a fixed box and a connecting pipe. The square plate is fixedly connected to the upper side of the front end of the recovery box. An air pump is fixedly connected to the upper end of the square plate. The air inlet end of the air pump is fixedly connected to one end of the fixed box. The other end of the fixed box is communicated with the recovery box through the air extraction pipe. The air outlet end of the air pump is fixedly connected to one end of the exhaust pipe. A connecting pipe is fixedly connected to the exhaust pipe. The connecting pipe is fixedly connected to the front end of the recovery box and is communicated with the recovery box. A three-way valve is fixedly connected to the recovery pipe. Control valves are fixedly connected to the air outlet pipe, the exhaust pipe and the connecting pipe. The control valve on the exhaust pipe is located on the left side of the connecting pipe. The other end of the exhaust pipe is fixedly connected to an air inlet end of the three-way valve. A gas detector is fixed on the top of the fixed box. The detection end of the gas detector is located inside the fixed box.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] The present utility model can monitor the liquid level height of SF6 in the recovery box in real time through a liquid level gauge, ensure that the liquid level height of SF6 in the recovery component is within a safe range, and prevent safety risks caused by overfilling.

[0024] The present utility model can replace the molecular sieve in the placement tank.

[0025] The present utility model can detect whether the purified SF6 gas meets the standards. The specific standard parameters are determined according to actual requirements or national standards. It can also judge whether it is necessary to replace the molecular sieve in the placement tank according to the detection results, and can avoid the use of unqualified SF6 gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a three-dimensional view of an SF6 recovery device for monitoring the liquid level of a recovery box of the present utility model Figure 1 ;

[0028] Figure 2 is a front view of an SF6 recovery device for monitoring the liquid level of a recovery box of the present utility model;

[0029] Figure 3 is a right view of an SF6 recovery device for monitoring the liquid level of a recovery box of the present utility model;

[0030] Figure 4Three-dimensional view of an SF6 recovery device for monitoring the liquid level of a recovery tank of the present utility model Figure 2 ;

[0031] Figure 5 Three-dimensional view of the impurity removal component of an SF6 recovery device for monitoring the liquid level of a recovery tank of the present utility model;

[0032] Figure 6 Along Figure 3 Cross-sectional view taken along the A-A direction of;

[0033] Figure 7 For Figure 4 Enlarged view at B in;

[0034] The reference numerals in the figure respectively represent:

[0035] 1. Recovery component; 11. Recovery tank; 12. Placing groove; 13. Recovery gas pipe; 14. Outlet pipe; 2. Purification component; 21. Impurity removal component; 211. Placing tank; 212. Sealing door; 213. Vent hole; 214. Clamping block; 215. Through groove; 22. Locking component; 221. Installation groove; 222. Slide bar; 223. Spring; 224. Connecting plate; 225. Fixed plate; 226. Insert block; 3. Detection component; 31. Square plate; 32. Air pump; 33. Suction pipe; 34. Gas detector; 35. Exhaust pipe; 36. Three-way valve; 37. Control valve 38. Fixed box; 39. Connecting pipe; 4. Monitoring component 41. Condensing pipe; 42. Heating pipe; 43. Liquid level gauge. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0037] The "left", "right", "front", "rear", "upper" and "lower" mentioned in the following description are oriented in the perspective direction of the front view. Embodiment

[0038] In some embodiments, please refer to the accompanying drawings of the specification Figures 1-7 , an SF6 recovery device for monitoring the liquid level of a recovery tank, includes a recovery component 1;

[0039] A monitoring component 4 is installed in the recovery component 1;

[0040] At the upper end of the recovery component 1, a purification component 2 for removing impurities and moisture in SF6 gas is installed;

[0041] The purification component 2 includes an impurity removal component 21 and a locking component 22. Both the impurity removal component 21 and the locking component 22 are connected to the recovery component 1, and the impurity removal component 21 and the locking component 22 are connected;

[0042] On the recovery component 1, a detection component 3 for detecting whether the SF6 gas is qualified is installed.

[0043] During use, the SF6 gas enters the impurity removal component 21 through the recovery component 1. The impurity removal component 21 removes the impurities and moisture in the SF6 gas, thereby achieving the effect of purifying the SF6 gas. Then, the purified SF6 gas is discharged into the recovery component 1. The detection component 3 detects whether the purified SF6 gas meets the standard. The specific standard parameters are determined according to actual requirements or national standards. If the detection is unqualified, the SF6 gas is re-passed through the impurity removal component 21 for re-purification through the detection component 3, and the re-purified SF6 gas is re-detected. If the detection is still unqualified, it means that the molecular sieve in the impurity removal component 21 needs to be replaced. If the detection is qualified, the SF6 gas can be re-passed into the recovery component 1. It can detect whether the purified SF6 gas meets the standard, and can also judge whether it is necessary to replace the molecular sieve in the impurity removal component 21 according to the detection result. The qualified SF6 gas is condensed into a liquid state by the monitoring component 4. At the same time, the monitoring component 4 monitors the height of the liquid SF6 in the recovery component 1 to ensure that the height of the SF6 liquid in the recovery component 1 is within a safe range and prevent safety risks caused by overfilling;

[0044] The recovery component 1 includes a recovery box 11, a placement groove 12, a recovery gas pipe 13, and an outlet pipe 14. A placement groove 12 is opened at the upper end of the recovery box 11, and a recovery gas pipe 13 and an outlet pipe 14 are fixedly connected to the left end of the recovery box 11.

[0045] The recovery box 11, the recovery gas pipe 13, and the outlet pipe 14 are all connected to the detection component 3. The recovery box 11 and the placement groove 12 are both connected to the impurity removal component 21, and the recovery box 11 is connected to the locking component 22.

[0046] The monitoring component 4 includes a condensing pipe 41, a heating pipe 42, and a liquid level gauge 43. The condensing pipe 41 and the liquid level gauge 43 are both fixedly connected to the inner wall of the recovery box 11, and the heating pipe 42 is fixedly connected to the lower inner wall of the recovery box 11.

[0047] Preferably, the liquid level gauge 43 is an ultrasonic liquid level gauge.

[0048] The impurity removal component 21 includes a placement tank 211, a sealing door 212, ventilation holes 213, clamping blocks 214 and through grooves 215. The placement tank 211 is filled with molecular sieve. The placement tank 211 is embedded in the placement groove 12 and is in sliding fit connection with the placement groove 12. Ventilation holes 213 are provided on both the position of the recovery gas pipe 13 and the right inner wall of the lower end of the placement tank 211. The left end of the sealing door 212 is hinged to the front side of the right end of the placement tank 211. Two groups of clamping blocks 214 are fixedly connected to the right rear side of the sealing door 212. Two groups of through grooves 215 into which the clamping blocks 214 are inserted are provided at the rear end of the placement tank 211.

[0049] Both the clamping blocks 214 and the through grooves 215 are connected to the locking component 22.

[0050] Preferably, a handle is fixedly connected to the upper side of the right end of the placement tank 211.

[0051] The locking component 22 includes installation grooves 221, sliding rods 222, springs 223, connecting plates 224, fixing plates 225 and insertion blocks 226. Two installation grooves 221 are provided at the right rear side of the recovery box 11. Sliding rods 222 are slidably connected in the installation grooves 221. One end of each sliding rod 222 is embedded in the through groove 215 and is fixedly connected to the fixing plate 225. An insertion block 226 is fixedly connected to the outer side of the rear end of the fixing plate 225. The insertion block 226 is clamped with the clamping block 214. The other ends of the sliding rods 222 are fixedly connected to the connecting plates 224. Springs 223 are sleeved on the sliding rods 222. The two ends of each spring 223 are fixedly connected to the inner wall of the installation groove 221 and the sliding rod 222 respectively.

[0052] During purification, SF6 gas is introduced into the placement tank 211 through the recovery gas pipe 13 and the ventilation holes 213. The molecular sieve in the placement tank 211 removes moisture and impurities in the SF6 gas. Then, the purified SF6 gas is introduced into the recovery box 11 through the ventilation holes 213 on the right inner wall of the lower end of the placement tank 211. Then, the detection component 3 detects whether the purified SF6 gas meets the standards. After passing the detection, the condensing pipe 41 cools the SF6 gas in the recovery box 11 to condense the SF6 gas into a liquid state. The liquid level gauge 43 monitors the liquid level height of SF6 in the recovery box 11 in real time to ensure that the liquid level height of SF6 in the recovery component 1 is within a safe range. When SF6 gas is needed, the heating pipe 42 heats the liquid SF6 to make it become gas again;

[0053] When replacing the molecular sieve, press the connecting plate 224, the connecting plate 224 drives the slide bar 222 to move forward to compress the spring 223, the slide bar 222 drives the fixing plate 225 and the plug block 226 to move forward to disengage from the block 214, and press against the sealing door 212, and at the same time pull the handle at the right end of the placement tank 211 to the right until the placement tank 211 is separated from the placement slot 12, and the molecular sieve in the placement tank 211 will not fall out of the placement tank 211 during the movement, then open the sealing door 212, pour out the molecular sieve in the placement tank 211, and then The new molecular sieve is put back into the placement tank 211, the sealing door 212 is closed, the sealing door 212 drives the card block 214 to be inserted into the through groove 215, the placement tank 211 is put back into the placement groove 12, the connecting plate 224 is loosened, the slide bar 222 drives the connecting plate 224 to move backward under the elastic action of the spring 223, and at the same time, the slide bar 222 drives the fixing plate 225 and the insert block 226 to move backward so that the insert block 226 is inserted into the card groove on the card block 214, so as to realize the locking and limiting of the sealing door 212 and the placement tank 211;

[0054] The detection assembly 3 includes a square plate 31, an air pump 32, an air extraction pipe 33, a gas detector 34, an exhaust pipe 35, a three-way valve 36, a control valve 37, a fixing box 38 and a connecting pipe 39. The square plate 31 is fixedly connected to the upper side of the front end of the recovery box 11, and the upper end of the square plate 31 is fixedly connected to the air pump 32. The air inlet end of the air pump 32 is fixedly connected to one end of the fixing box 38, and the other end of the fixing box 38 is connected to the recovery box 11 through the air extraction pipe 33. The air outlet end of the air pump 32 is fixedly connected to one end of the exhaust pipe 35. A connecting pipe 39 is fixedly connected, and the connecting pipe 39 is fixedly connected to the front end of the recovery box 11 and communicates with the recovery box 11. A three-way valve 36 is fixedly connected to the recovery air pipe 13. A control valve 37 is fixedly connected to the air outlet pipe 14, the exhaust pipe 35 and the connecting pipe 39. The control valve 37 on the exhaust pipe 35 is located on the left side of the connecting pipe 39. The other end of the exhaust pipe 35 is fixedly connected to an air inlet end of the three-way valve 36. A gas detector 34 is fixed on the top of the fixed box 38, and the detection end of the gas detector 34 is located inside the fixed box 38.

[0055] The gas detector 34 is an existing detection instrument for detecting whether the SF6 gas is standard. Since it is an existing instrument, it will not be described in detail.

[0056] In use, start the air pump 32 to suck the SF6 gas that has been decontaminated through the suction pipe 33 into the fixed box 38. The gas detector 34 detects whether the SF6 gas is qualified. If the detection is qualified, open the control valve 37 on the connecting pipe 39, and the SF6 gas can return to the gas storage tank 10 through the air pump 32, the exhaust pipe 35 and the connecting pipe 39 and wait for normal use. When the detection is unqualified, open the control valve 37 on the exhaust pipe 35, and the SF6 gas is discharged into the placement tank 211 through the air pump 32, the exhaust pipe 35, the three-way valve 36 and the recovery pipe 13, and then decontaminated again. Then, the re-purified SF6 gas is detected again. If the detection is still unqualified, it means that the molecular sieve in the placement tank 211 has been saturated with adsorption, and the molecular sieve needs to be replaced. The operation is simple, and it can avoid the use of unqualified SF6 gas.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A SF6 recovery device for monitoring the liquid level of a recovery box (11), comprising a recovery component (1), characterized in that: A monitoring component is installed in the recovery component (1); A purification component (2) for removing impurities and moisture from SF6 gas is installed at the upper end of the recovery component (1); The purification component (2) comprises an impurity removal component (21) and a locking component (22), wherein the impurity removal component (21) and the locking component (22) are both connected to the recovery component (1), and the impurity removal component (21) and the locking component (22) are connected; The recovery component (1) is provided with a detection component (3) for detecting whether the SF6 gas is qualified.

2. The SF6 recovery device for monitoring the liquid level of the recovery tank (11) according to claim 1 is characterized in that: The recovery component (1) comprises a recovery box (11), a placement slot (12), a recovery air pipe (13) and an air outlet pipe (14); the placement slot (12) is provided at the upper end of the recovery box (11), and the recovery air pipe (13) and the air outlet pipe (14) are fixedly connected to the left end of the recovery box (11).

3. The SF6 recovery device for monitoring the liquid level of the recovery box (11) according to claim 2 is characterized in that: The recovery box (11), the recovery air pipe (13) and the air outlet pipe (14) are all connected to the detection component (3), the recovery box (11) and the placement slot (12) are all connected to the impurity removal component (21), and the recovery box (11) is connected to the locking component (22).

4. The SF6 recovery device for monitoring the liquid level of the recovery tank (11) according to claim 3 is characterized in that: The monitoring assembly comprises a condenser, a heating tube (42) and a liquid level gauge, the condenser and the liquid level gauge are both fixedly connected to the inner wall of the recovery box (11), and the heating tube (42) is fixedly connected to the inner wall of the lower end of the recovery box (11).

5. The SF6 recovery device for monitoring the liquid level of the recovery box (11) according to claim 4 is characterized in that: The liquid level meter is an ultrasonic liquid level meter (43).

6. The SF6 recovery device for monitoring the liquid level of the recovery box (11) according to claim 5, characterized in that: The impurity removal component (21) comprises a placement tank (211), a sealing door (212), a vent (213), a block (214) and a through groove (215); the placement tank (211) is filled with a molecular sieve; the placement tank (211) is embedded in the placement groove (12) and is slidably connected to the placement groove (12); the placement tank (211) is provided with a vent (213) at the right inner wall of the recovery air pipe (13) and the lower end; the left end of the sealing door (212) is hinged to the front side of the right end of the placement tank (211); two groups of blocks (214) are fixedly connected to the right side of the rear end of the sealing door (212); and the rear end of the placement tank (211) is provided with two groups of through grooves (215) plugged with the blocks (214).

7. The SF6 recovery device for monitoring the liquid level of the recovery box (11) according to claim 6 is characterized in that: The clamping block (214) and the through slot (215) are both connected to the locking assembly (22).

8. The SF6 recovery device for monitoring the liquid level of the recovery box (11) according to claim 7, characterized in that: A handle is fixedly connected to the upper side of the right end of the placement tank (211).

9. The SF6 recovery device for monitoring the liquid level of the recovery box (11) according to claim 8, characterized in that: The locking assembly (22) comprises a mounting groove (221), a slide bar (222), a spring (223), a connecting plate (224), a fixing plate (225) and an insert block (226). Two mounting grooves (221) are provided at the rear side of the right end of the recycling box (11). The mounting grooves (221) are slidably connected with slide bars (222). One end of the slide bar (222) is embedded in the through groove (215) and fixedly connected to the fixing plate (225). An insert block (226) is fixedly connected to the outer side of the rear end of the fixing plate (225). The insert block (226) is clamped with the clamping block (214). The other end of the slide bar (222) is fixedly connected to the connecting plate (224). The slide bar (222) is sleeved with a spring (223). The two ends of the spring (223) are respectively fixedly connected to the inner wall of the mounting groove (221) and the slide bar (222).

10. The SF6 recovery device for monitoring the liquid level of the recovery box (11) according to claim 9, characterized in that: The detection assembly (3) comprises a square plate (31), an air pump (32), an air extraction pipe (33), a gas detector (34), an exhaust pipe (35), a three-way valve (36), a control valve, a fixing box and a connecting pipe (39), wherein the square plate (31) is fixedly connected to the upper side of the front end of the recovery box (11), the upper end of the square plate (31) is fixedly connected to the air pump (32), the air inlet end of the air pump (32) is fixedly connected to one end of the fixing box, the other end of the fixing box is connected to the recovery box (11) via the air extraction pipe (33), the air outlet end of the air pump (32) is fixedly connected to one end of the exhaust pipe (35), and the exhaust pipe (39) is connected to the recovery box (11). 5) is fixedly connected to a connecting pipe (39), the connecting pipe (39) is fixedly connected to the front end of the recovery box (11) and communicates with the recovery box (11), the recovery air pipe (13) is fixedly connected to a three-way valve (36), the outlet pipe (14), the exhaust pipe (35) and the connecting pipe (39) are all fixedly connected to a control valve, the control valve on the exhaust pipe (35) is located on the left side of the connecting pipe (39), the other end of the exhaust pipe (35) is fixedly connected to an air inlet end of the three-way valve (36), and a gas detector (34) is fixed on the top of the fixed box, and the detection end of the gas detector (34) is located inside the fixed box.

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