Chemical tank with liquid level abnormity alarm function
By adopting a duckbill-type float switch and float structure in the chemical tank, the problems of high cost and poor reliability of liquid level detection in the existing technology are solved, realizing low-cost and reliable liquid level anomaly alarm and ensuring the safe operation of rare earth extraction tank.
Patent Information
- Application Number
- CN202423187826.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In the existing technology, the liquid level detection device for rare earth extraction tank is expensive and not suitable for multi-stage extraction and separation production lines. It is also prone to overflow due to the liquid level rising caused by the agitator failure or the overflow box blockage, resulting in organic phase loss and environmental pollution.
A chemical tank with abnormal liquid level alarm function was designed. It adopts a duckbill float switch and float structure. The corrosion resistance is ensured by interference fit and sealing ring. Combined with the signal line to connect to the alarm, the abnormal liquid level alarm is realized. The float triggers the liquid level switch to act as the liquid level changes.
It achieves low-cost and reliable liquid level anomaly alarm, prevents the liquid level in the tank from rising, ensures production safety, and avoids organic phase loss and environmental pollution.
Smart Images
Figure CN223660154U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of liquid level switch, concretely relates to a chemical tank with liquid level abnormality alarm function. BACKGROUND
[0002] In the rare earth production process, the separation of rare earth elements adopts extraction separation technology, and a box type mixing and clarifying extractor is used in the production process. The device adopts a multi-stage series connection and countercurrent extraction mode, and the organic phase and the aqueous phase realize flow circulation. The extraction force is formed by stirring rotation to extract the organic phase of the upper stage and the aqueous phase of the lower stage into a mixing chamber for mixing, overflow to a clarification chamber for layering, and the layered organic phase is extracted into the mixing chamber of the next stage through an organic overflow box, and the aqueous phase is extracted into the mixing chamber of the previous stage through an aqueous phase overflow box. When the stirring motor fails to be extracted, or the organic phase and the aqueous phase overflow box are blocked and cannot flow, the overall liquid level in the extraction tank will rise, which may cause the tank to overflow and cause loss of the organic phase and environmental pollution if not discovered in time.
[0003] In order to discover the rise of the liquid level in time, a liquid level meter or a liquid level switch is used to detect the change of the liquid level position, and an alarm is given when the liquid level is abnormal. Since the organic phase and the extraction tank body environment are corrosive, a non-contact liquid level meter such as a radar liquid level meter is often used, or a corrosion-resistant liquid level switch such as a liquid level switch made of tetrafluoro material is used. The above liquid level meter is expensive and not suitable for a rare earth extraction separation production line with a large number of stages. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims to provide a chemical tank with liquid level abnormality alarm function, which can realize liquid level abnormality alarm and ensure normal operation of production.
[0005] The technical scheme is as follows:
[0006] The chemical tank with liquid level abnormality alarm function comprises a tank body, a deviation correction sleeve, a float, a switch fixing plate, a liquid level switch and an alarm. The tank body is provided with a tank cover plate at the top. The tank cover plate is provided with a cover plate through hole. The deviation correction sleeve is connected to the cover plate through hole. The cover plate through hole is circular in shape. The deviation correction sleeve is a cylindrical structure with open ends. The float is a cylindrical structure with closed ends. The float is provided with a float top cover at the top. The float is sleeved in the deviation correction sleeve and the cover plate through hole. The outer diameter of the float top cover is larger than the outer diameter of the deviation correction sleeve. The switch fixing plate is located at the side of the deviation correction sleeve and connected to the top of the tank cover plate at the bottom. The switch fixing plate is provided with a fixing plate through hole. The liquid level switch is fixed in the fixing plate through hole. The float ball of the liquid level switch is located at the upper part of the float top cover. The signal output end of the liquid level switch is connected to the alarm through a signal line.
[0007] Further, the inner diameters of the deviation correction sleeve and the cover plate through hole are the same. The outer diameter of the float is the same as the inner diameters of the deviation correction sleeve and the cover plate through hole. The float is in interference fit with the deviation correction sleeve and the cover plate through hole.
[0008] Further, the top end of the deviation rectifying sleeve is higher than the groove cover plate.
[0009] Further, the top cover of the float is provided with a sealing ring in the contact part with the upper end surface of the deviation rectifying sleeve.
[0010] Further, the through hole of the fixing plate is a long hole.
[0011] Further, the liquid level switch is a duckbill type float ball switch, which is internally provided with a reed tube and a magnet, the float ball is connected to the end of a connecting rod, the connecting rod is hingedly connected to a transmission rotating shaft of the duckbill type float ball switch, and the transmission rotating shaft is connected to the magnet.
[0012] Further, the alarm is fixed on the switch fixing plate.
[0013] Compared with the prior art, the utility model has the following advantages:
[0014] The utility model discloses simple structure, reliable performance, low manufacturing cost have the characteristics of corrosion resistance, apply to extraction tank, can realize liquid level abnormality alarm, guarantee normal operation of production. DETAILED DESCRIPTION
[0015] Figure 1 It is the structure schematic diagram of extraction tank in the utility model.
[0016] Figure 2 It is the use state schematic diagram of extraction tank in the utility model. DETAILED DESCRIPTION
[0017] The following description fully shows the specific implementation scheme of the utility model, so that the person skilled in the art can practice and reproduce.
[0018] As Figure 1 It is the structure schematic diagram of extraction tank in the utility model.
[0019] The chemical tank with liquid level abnormality alarm function includes: tank body 1, deviation rectifying sleeve 2, float 3, switch fixing plate 4, liquid level switch 5, the top of tank body 1 is provided with groove cover plate 11, the groove cover plate 11 is provided with cover plate through hole, and the cover plate through hole is connected with deviation rectifying sleeve 2;The shape of cover plate through hole is circular, deviation rectifying sleeve 2 is the open cylinder structure of both ends, and the both ends of float 3 are closed and are cylindrical structure, and the top of float 3 is provided with float top cover 31, float 3 is sleeved in deviation rectifying sleeve 2, cover plate through hole, and the outer diameter of float top cover 31 is greater than the outer diameter of deviation rectifying sleeve 2;Switch fixing plate 4 is located at the side of deviation rectifying sleeve 2, and the bottom is connected at the top of groove cover plate 11, and switch fixing plate 4 is provided with fixing plate through hole, and liquid level switch 5 is fixed in fixing plate through hole, and the float ball 51 of liquid level switch 5 is located at the upper portion of float top cover 31.
[0020] The inner diameter of the deviation rectifying sleeve 2 and the cover plate through hole is same, the outer diameter of the float 3 is same with the inner diameter of the deviation rectifying sleeve 2 and the cover plate through hole, and an interference fit is adopted, so that sealing is facilitated, and overflow of gas in the extraction tank is prevented. The top end of the deviation rectifying sleeve 2 is higher than the tank cover plate 11. The top end of the deviation rectifying sleeve 2 is polished. The deviation rectifying sleeve 2 functions to restrict the float 3 to move up and down within a fixed range along with the liquid level change.
[0021] The bottom end of the float 3 can be at a position 20-30mm above the mixed rare earth liquid, the top pipe of the float 3 is welded with a float top cover 31, and the float top cover 31 is provided with an anti-corrosion sealing ring at the contact part with the upper end surface of the deviation rectifying sleeve 2. Under normal liquid level conditions, the sealing ring is tightly buckled at the bottom end of the deviation rectifying sleeve 2, the upper end surface of the deviation rectifying sleeve 2 is polished, the overflow of volatile gas in the tank is prevented, and the operation environment is ensured. The float 3 can be processed by using a thin-walled pipe of a corrosion-resistant organic molecular material such as PVC, PE and PP according to the liquid property, the material range is wide, and the processing is simple.
[0022] The through hole of the fixed plate is a long hole, so that the installation position of the liquid level switch 5 is facilitated. The liquid level switch 5 is selected to be a duckbill type float ball switch, which is internally provided with a dry reed tube and a magnet, the float ball 51 is connected to the end of a connecting rod, the connecting rod is hingedly connected with a transmission rotating shaft of the duckbill type float ball switch 5, the transmission rotating shaft is connected with the magnet, and the magnet is driven to make a small displacement. The duckbill type float ball switch is a liquid level control part with simple structure and convenient use. Since the liquid level switch 5 does not contact with the liquid, the duckbill switch can meet the working condition requirements, the material quality is not specially required, and the procurement cost is low.
[0023] The alarm 6 is fixed on the switch fixed plate 4, and the alarm 6 can also be installed at other positions such as a control room. The alarm 6 is connected with the signal output end of the liquid level switch 5 through a signal line.
[0024] As shown in FIG. 1, it is a use state schematic view of the extraction tank in the utility model. Figure 2
[0025] The liquid level switch keeps a normally open state. When the liquid surface rises, the float 3 rises along the inner wall of the deviation rectifying sleeve 2, the float top cover 31 pushes the float ball 51 to rise, the liquid level switch 5 is touched to a closed state, and a signal is transmitted to the alarm 6 through a signal line to trigger an alarm.
[0026] The liquid level switch 5 can also transmit a signal to a central control system through a signal line to realize remote alarm.
[0027] Example 1
[0028] In combination with the actual production situation, the rare earth extraction tank flow abnormal detection method is proposed. During the liquid level rising process, it is found that the organic overflow box liquid level rises first each time the flow is abnormal. When the organic overflow box is full, the alarm will be triggered in 1-3 seconds. There is one alarm device for each level, which can accurately know the fault point at the first time and reach the scene in time.
[0029] The float 3 is made of Φ50*2.4mm PVC pipe with a length of 40mm. The float top cover 31 is cut from a PVC plate with a diameter R=40mm. The float top cover 31 is welded at the top end of the float 3, and the other end is sealed with a PVC welding rod around the round cover plate. The float 3 transmits the position signal of the abnormally rising liquid level through the buoyancy, triggers the action of the liquid level switch 5 and feeds back the signal. Since the float 5 can withstand high-temperature permeable corrosion environment and also can play a physical isolation role, it can prolong the service life of the liquid level switch 5.
[0030] The deviation sleeve 2 is made of Φ63*4.7mm*30mm PVC pipe. The deviation sleeve 2 can make the float 3 move vertically up and down with the liquid level, accurately trigger the action of the duckbill type liquid level switch. The switch fixing plate 4 can also prevent the float ball 51 from being kicked or stepped on during maintenance, and plays a role in protecting the liquid level switch 5.
[0031] The duckbill liquid level switch generates a signal through the internal dry reed tube, transmits the alarm signal to the DCS system, and informs the control personnel. Turning on the stirrer causes the flow in the tank body to be abnormal, and the organic liquid surface of the organic overflow port rises rapidly. The float 3 is pushed vertically upward by the buoyancy, the float 3 pushes the duckbill type liquid level switch, the normally open point of the duckbill type liquid level switch is closed, and the alarm 6 issues an audible and visual alarm.
[0032] Example 2
[0033] In rare earth chemical production, hydrochloric acid storage tank is a common device for storing corrosive hydrochloric acid. When feeding the hydrochloric acid storage tank, the float 5 rises with the rising liquid level. The duckbill type float liquid level switch works by using the principle of buoyancy, and the float 5 is linked with the duckbill type liquid level switch. When the hydrochloric acid liquid level rises to a certain high liquid level, the float 5 rises to the corresponding position and triggers the duckbill type liquid level switch. The duckbill liquid level switch transmits a signal to the control system, and the control system generates an alarm after receiving the signal. This can effectively prevent hydrochloric acid from overflowing the storage tank and avoid serious corrosion of the surrounding environment and equipment due to hydrochloric acid leakage, ensuring production safety and normal operation of equipment.
[0034] The float 3 is made of Φ75*3.6mm PVC pipe with a length of 800mm. The float 3 can withstand high-temperature permeable corrosion environment and also can play a physical isolation role, prolonging the service life of the liquid level switch 5. The deviation sleeve 2 is made of Φ90*6.7mm*530mm PVC pipe.
[0035] The terms used in the present application are illustrative and exemplary, but not restrictive terms. Since the present application can be embodied in various forms without departing from the spirit or essential characteristics of the technical scheme, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but are to be broadly interpreted within the spirit and scope of the appended claims, and thus all changes and modifications that fall within the meaning and range of equivalency of the claims are to be embraced by the appended claims.
Claims
1. A chemical tank with an abnormal liquid level alarm function, characterized in that, The utility model relates to a kind of liquid level control device, including: Tank body, deviation rectification sleeve, float, switch fixed plate, liquid level switch, alarm, tank body top is provided with tank cover, tank cover is opened with cover through-hole, cover through-hole is connected with deviation rectification sleeve;The shape of cover through-hole is circular, deviation rectification sleeve is the cylindrical structure of two ends opening, float is the cylindrical structure of two ends closing, float top is provided with float top cover, float is sleeved in deviation rectification sleeve, cover through-hole, the outer diameter of float top cover is greater than the outer diameter of deviation rectification sleeve;Switch fixed plate is located deviation rectification sleeve side portion, bottom is connected in tank cover top, switch fixed plate is provided with fixed plate through-hole, liquid level switch is fixed in fixed plate through-hole, the float ball of liquid level switch is located float top cover upper portion, the signal output end of liquid level switch is connected alarm through signal line.
2. The chemical tank with liquid level abnormality alarm function according to claim 1, characterized in that, The inner diameter of deviation rectification sleeve and cover through-hole is same, the outer diameter of float is same with the inner diameter of deviation rectification sleeve and cover through-hole, and float is respectively with deviation rectification sleeve and cover through-hole using interference fit.
3. The chemical tank with liquid level abnormality alarm function according to claim 1, wherein The top end of deviation rectification sleeve is higher than tank cover.
4. The chemical tank with liquid level abnormality alarm function according to claim 1, wherein The contact part of float top cover and deviation rectification sleeve upper end surface is equipped with sealing ring.
5. The chemical tank with liquid level abnormality alarm function according to claim 1, wherein Fixed plate through-hole is long hole.
6. The chemical tank with liquid level abnormality alarm function according to claim 1, wherein Liquid level switch selects duckbill type float ball switch, is provided with reed and magnet inside, float ball is connected in connecting rod end, connecting rod is hinged with the transmission pivot of duckbill type float ball switch, transmission pivot is connected with magnet.
7. The chemical tank with liquid level abnormality alarm function according to claim 1, wherein Alarm is fixed on switch fixed plate.