Magnetic flap liquid level meter for corrosive medium

Abstract

The invention relates to the technical field of magnetic turning plate liquid level meters, and provides a magnetic turning plate liquid level meter for corrosive media, which comprises a communicating pipe, a reinforcing mechanism, a turning plate box and a magnetic floater, the communicating pipe comprises a middle pipe and two end pipes, the two end pipes are detachably fixed at the two ends of the middle pipe respectively and are communicated with the interior of the middle pipe, and the middle pipe and the two end pipes are communicated with each other. The end pipes and the middle pipe are made of PVC materials. The reinforcing mechanism is used for abutting against the middle pipe. The turning plate box is arranged on the peripheral side of the middle pipe; the magnetic floater is arranged in the middle pipe in a sliding mode. According to the liquid level meter, the middle pipe and the two end pipes are arranged and are all made of PVC materials, the anti-corrosion performance of the liquid level meter can be improved, the problems caused when the middle pipe deforms or the magnetic floater breaks down can be rapidly solved by disassembling and assembling the middle pipe, and the reinforcing mechanism is arranged, so that the anti-corrosion performance of the liquid level meter is improved. And the anti-deformation capability of the middle pipe can be improved, so that the normal use of the liquid level meter is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic flap level gauges, and particularly to a magnetic flap level gauge for corrosive media. Background Art

[0002] A magnetic flap level gauge is a liquid level measuring instrument that works based on the principle of magnetic coupling. It usually consists of a communicating pipe, a float, magnetic flaps, etc. As the float moves up and down with the change of the liquid level, it drives the magnetic flaps to flip, thereby visually displaying the liquid level height.

[0003] In fields such as chemical industry, petroleum, and pharmaceuticals, the media detected by magnetic flap level gauges are usually corrosive. To ensure the safe operation of magnetic flap level gauges, corresponding protective mechanisms need to be set up. For example, a highly corrosion-resistant lined flap level gauge disclosed in the utility model with the publication number CN216524271U has a Teflon coating on the inner wall of the liquid level tube, and the anti-corrosion performance of the level gauge is improved by using the Teflon coating; in the actual application process, as the usage time of the magnetic flap level gauge increases, the adhesion between the Teflon coating and the base material of the level gauge gradually weakens. Especially when the temperature fluctuates greatly, the Teflon coating is prone to peeling off, resulting in the failure of the anti-corrosion performance of the magnetic flap level gauge. In order to enable the magnetic flap level gauge to maintain long-term anti-corrosion performance, in the prior art, the material of the magnetic flap level gauge is directly replaced with anti-corrosion materials such as PVC.

[0004] However, anti-corrosion materials such as PVC have low toughness. Especially when the length of the magnetic flap level gauge is relatively large, affected by pressure and temperature, the magnetic flap level gauge is prone to bending deformation, resulting in the magnetic float inside the magnetic flap level gauge not being able to move up and down smoothly, thereby affecting the normal use of the magnetic flap level gauge. Summary of the Invention

[0005] In view of this, the present invention provides a magnetic flap level gauge for corrosive media, which can improve the anti-deformation ability of the magnetic flap level gauge made of PVC material, and facilitate the replacement of the deformed intermediate pipe, ensuring the normal use of the magnetic flap level gauge.

[0006] The technical solution of the present invention is realized as follows: The present invention provides a magnetic flap level gauge for corrosive media, including a communicating pipe, a strengthening mechanism, a flap box, and a magnetic float. Among them, the communicating pipe includes an intermediate pipe and two end pipes. The two end pipes are respectively detachably fixed at both ends of the intermediate pipe and are in communication with its interior. The end pipes and the intermediate pipe are both made of PVC material; the strengthening mechanism is used to hold the intermediate pipe to keep it in a straight state; the flap box is arranged on the periphery of the intermediate pipe; the magnetic float is slidably arranged inside the intermediate pipe.

[0007] On the basis of the above technical solutions, preferably, the end pipe includes an L-shaped pipe, a fixed flange and a mounting flange, and the strengthening mechanism includes a sleeve, a connecting flange and a fixing bolt. Among them, the fixed flange and the mounting flange are respectively fixedly arranged at both ends of the L-shaped pipe; the intermediate pipe is slidably arranged in the sleeve, and both ends thereof are respectively abutted against the two fixed flanges; the connecting flanges are respectively fixedly arranged at both ends of the sleeve and are connected to the fixed flange through the fixing bolt, and both the connecting flange and the sleeve are made of a metal material with a hardness greater than that of the connecting pipe.

[0008] More preferably, three fixing holes are formed in the fixed flange, and the three fixing holes are arranged in a circumferential array around the axis of the intermediate pipe; an easy-disassembly hole, a displacement hole and a locking hole are formed in the connecting flange, and the easy-disassembly hole, the displacement hole and the locking hole respectively correspond to the three fixing holes one by one and are connected to them through the fixing bolt; the axis of the easy-disassembly hole, the axis of the intermediate pipe and the axis of the mounting flange are located in the same plane, and the easy-disassembly hole is located on the side of the intermediate pipe away from the mounting flange, and the easy-disassembly hole penetrates to the side of the connecting flange away from the mounting flange.

[0009] More preferably, the displacement hole includes an oblong hole, the oblong hole is formed in the connecting flange, and the length direction thereof is parallel to the axis of the mounting flange; the fixing bolt includes a screw rod, a screw head and a nut, the screw rod penetrates and is slidably arranged in the fixing hole, the easy-disassembly hole, the displacement hole or the locking hole; the screw head is fixedly arranged on the screw rod; the nut is threadedly connected to the screw rod and respectively abuts against the connecting flange and the fixed flange with the screw head; the diameter of the screw rod is 2R0, the length of the oblong hole is L1, and the length of the easy-disassembly hole is L2, where L1≥(L2 + 2R0).

[0010] More preferably, the displacement hole further includes a positioning groove, the positioning groove is formed on the top side of the connecting flange and is located at one end of the oblong hole close to the mounting flange, and one of the nuts is rotatably arranged in the positioning groove; the radius of the connecting flange is R1, the distance between the center point of the fixing hole corresponding to the displacement hole and the mounting flange is L3, and the minimum distances between the center points at both ends of the oblong hole and the circumferential side of the connecting flange are L4 and L5 respectively; where L4 < L5, and (R1 - L5) ≤ L3 < (R1 - L4); the fixing hole corresponding to the displacement hole coincides with the positioning groove, and when the connecting flange abuts against the mounting flange, the projections of the intermediate pipe and the end pipe on the horizontal plane do not intersect.

[0011] More preferably, the intermediate pipe includes a pipe body and a limiting ring. Among them, the pipe body is slidably arranged in the sleeve, and its top is abutted against the upper fixed flange; the limiting ring is fixedly arranged in the sleeve and abutted against the pipe body and the lower fixed flange.

[0012] On the basis of the above technical solutions, preferably, the end pipe includes an L-shaped pipe, a fixed flange and a mounting flange, and the strengthening mechanism includes a connecting flange and a fixing bolt. Among them, the fixed flange and the mounting flange are respectively fixedly arranged at both ends of the L-shaped pipe; the connecting flanges are respectively fixedly arranged at both ends of the intermediate pipe and are connected to the fixed flange through the fixing bolt, and the connecting flange is made of PVC material.

[0013] More preferably, the flap box is made of a metal material with a hardness greater than that of the communicating pipe and is abutted against the peripheral side of the intermediate pipe.

[0014] On the basis of the above technical solutions, preferably, the strengthening mechanism further includes two top plates, and the two top plates are respectively fixedly arranged at both ends of the flap box and respectively abut against the two connecting flanges, and the top plates are connected to the fixed flange through the fixing bolts.

[0015] On the basis of the above technical solutions, preferably, the magnetic float includes two floating cylinders and rolling balls. Among them, the two floating cylinders are rotatably connected; the rolling balls are rollingly arranged on the peripheral side of the floating cylinder and are rollingly connected to the inner wall of the intermediate pipe, and a plurality of the rolling balls are arranged on each floating cylinder, and the plurality of rolling balls on the same floating cylinder are arranged in a circumferential array around the axis of the floating cylinder.

[0016] A magnetic flap level gauge for corrosive media according to the present invention has the following beneficial effects compared with the prior art:

[0017] (1) By arranging the intermediate pipe and the two end pipes and making both the intermediate pipe and the two end pipes made of PVC material, not only can the anti-corrosion performance of this level gauge be improved, but also the problem when the intermediate pipe is deformed or the magnetic float fails can be quickly solved by disassembling and assembling the intermediate pipe. By arranging the strengthening mechanism, the anti-deformation ability of the intermediate pipe can be improved, thus ensuring the normal use of the level gauge.

[0018] (2) By arranging two kinds of strengthening mechanisms, this level gauge can be adapted to different use conditions, thus expanding the applicable range of this level gauge.

[0019] (3) By arranging the easy-disassembly hole, the displacement hole and the locking hole, the disassembly of the connecting flange can be facilitated, thus improving the replacement efficiency of the intermediate pipe and the magnetic float and saving the maintenance time of the level gauge.

[0020] (4) By setting the shifting hole to include an oblong hole and a positioning groove, enabling the nut to rotate in cooperation with the positioning groove, and defining the specifications of the strengthening mechanism, the maintenance convenience of the intermediate pipe can be further improved, and the replacement effect of the intermediate pipe can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention 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 drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A three-dimensional view of a magnetic flap level gauge for corrosive media according to the present invention.

[0023] Figure 2 A cross-sectional view of a magnetic flap level gauge for corrosive media according to the present invention.

[0024] Figure 3 For Figure 2 An enlarged view of the position A in Embodiment 1.

[0025] Figure 4 A cross-sectional view of the casing part of a magnetic flap level gauge for corrosive media according to the present invention.

[0026] Figure 5 A three-dimensional view of the end pipe of a magnetic flap level gauge for corrosive media according to the present invention.

[0027] Figure 6 An exploded view of the connecting flange of a magnetic flap level gauge for corrosive media according to the present invention in Embodiment 1.

[0028] Figure 7 A three-dimensional view of the connecting flange of a magnetic flap level gauge for corrosive media according to the present invention in Embodiment 1.

[0029] Figure 8 A cross-sectional view of a magnetic flap level gauge for corrosive media according to the present invention in Embodiment 1, showing the state where the detachable hole is separated from the fixing bolt.

[0030] Figure 9 A cross-sectional view of a magnetic flap level gauge for corrosive media according to the present invention in Embodiment 1, showing the state of rotating the casing clockwise in the Figure 8 state.

[0031] Figure 10The sectional view of a magnetic flap level gauge for corrosive media according to the present invention in Embodiment 1 shows the state where the casing rotates clockwise in the Figure 9 state.

[0032] Figure 11 The sectional view of a magnetic flap level gauge for corrosive media according to the present invention in Embodiment 1 shows the state where the casing slides relative to the screw rod and rotates counterclockwise in the Figure 10 state.

[0033] Figure 12 The sectional view of the magnetic float in a magnetic flap level gauge for corrosive media according to the present invention.

[0034] Figure 13 The partial side view of a magnetic flap level gauge for corrosive media according to the present invention in Embodiment 2.

[0035] Figure 14 For Figure 2 the enlarged view of A in

[0036] Figure 15 The exploded view of the connection flange in Embodiment 2 of a magnetic flap level gauge for corrosive media according to the present invention.

[0037] Wherein: 1, communicating pipe; 11, intermediate pipe; 12, end pipe; 111, pipe body; 112, limiting ring; 121, L-shaped pipe; 122, fixed flange; 123, mounting flange; 101, fixing hole; 2, strengthening mechanism; 21, casing; 22, connection flange; 23, fixing bolt; 24, top plate; 231, screw rod; 232, screw head; 233, nut; 201, easy-disassembly hole; 202, displacement hole; 203, locking hole; 2021, oblong hole; 2022, positioning groove; 3, flap box; 4, magnetic float; 41, float; 42, ball. Detailed implementation manners

[0038] Next, in combination with the specific implementation manners of the present invention, the technical solutions in the present invention will be clearly and completely described. Obviously, the described implementation manners are only a part of the implementation manners of the present invention, rather than all of the implementation manners. Based on the implementation manners in the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present invention.

[0039] Embodiment 1

[0040] A magnetic flap level gauge for corrosive media according to the present invention includes a connecting pipe 1, a strengthening mechanism 2, a flap box 3 and a magnetic float 4. The two ends of the connecting pipe 1 are at different heights and are connected to the container to be measured. The liquid medium in the container to be measured flows into the connecting pipe 1, and the liquid level height of the liquid medium in the connecting pipe 1 is the same as that of the liquid medium in the container to be measured. At the same time, the magnetic float 4 floats on the liquid surface of the liquid medium under the action of buoyancy and rises and falls with the fluctuation of the liquid level height of the liquid medium.

[0041] A plurality of turning columns are arranged inside the flap box 3, and two colors are coated on the turning columns. A magnetic attraction component is arranged inside the magnetic float 4. When the magnetic float 4 rises to a certain height along with the liquid level, it can drive the turning columns at positions below the corresponding height in the flap box 3 to rotate, so as to display the liquid level height of the liquid medium in the container to be measured by using the difference in colors.

[0042] In the fields of chemical industry, petroleum, pharmacy, electric power, etc., corrosive solutions are widely used. Traditional magnetic flap level gauges mostly adopt metal materials such as stainless steel, carbon steel or aluminum alloy. These materials are prone to oxidation, erosion or pitting in corrosive media such as strong acids, strong alkalis and salt mists, resulting in equipment failure.

[0043] In the prior art, the corrosion resistance of magnetic flap level gauges is often improved by spraying anti-corrosion coatings (such as Teflon and ceramic coatings). However, the bonding force between the coating and the substrate is weak and is prone to peeling under temperature fluctuations, mechanical vibrations or long-term medium scouring, resulting in accelerated local corrosion of the magnetic flap level gauge.

[0044] To solve the corrosion problem, some magnetic flap level gauges directly use plastic materials such as PVC and PP to replace metals. However, plastics have poor mechanical properties, are prone to deformation and aging, and have insufficient high-temperature and pressure resistance. Especially when the length of the magnetic flap level gauge is relatively large, the level gauge is prone to bending under external forces, temperature or pressure fluctuations, resulting in jamming of the magnetic float 4 or malfunction of the flap flipping, affecting the normal use of the magnetic flap level gauge.

[0045] To solve the above problems, the present invention sets the connecting pipe 1 to include an intermediate pipe 11 and two end pipes 12. The two end pipes 12 are arranged at different heights and are connected to the container to be measured. The intermediate pipe 11 is detachably fixed between the two end pipes 12 and is internally connected to them. Both the end pipe 12 and the intermediate pipe 11 are made of PVC material. The length of the end pipe 12 is very small and is not prone to deformation. When the relatively long intermediate pipe 11 is deformed, the intermediate pipe 11 can be disassembled and replaced to ensure the normal use of the magnetic flap level gauge.

[0046] By setting the detachable intermediate pipe 11, not only can the maintenance cost of the magnetic flap level gauge be reduced, but also the maintenance or replacement of the magnetic float 4 can be facilitated, improving the maintenance convenience of the magnetic flap level gauge.

[0047] The end pipe 12 is usually L-shaped or T-shaped. Burrs and other phenomena are likely to occur at the connection position between the end pipe 12 and the intermediate pipe 11, resulting in the problem that the magnetic float 4 gets stuck in the end pipe 12. Therefore, as Figure 1 and Figure 2 shown, the flap box 3 is arranged on the periphery of the intermediate pipe 11, so that the magnetic float 4 only slides in the intermediate pipe 11 and does not slide into the end pipe 12 and the connection between the end pipe 12 and the intermediate pipe 11.

[0048] The strengthening mechanism 2 is used to hold the intermediate pipe 11, keep the intermediate pipe 11 in a straight state, reduce the bending risk of the intermediate pipe 11, and extend the service life of the magnetic flap level gauge.

[0049] As Figure 5 shown, the end pipe 12 includes an L-shaped pipe 121, a fixed flange 122 and a mounting flange 123. The L-shaped pipe 121 is an L-shaped tubular structure with a small specification and is not easily deformed. The fixed flange 122 and the mounting flange 123 are respectively fixedly arranged at both ends of the L-shaped pipe 121, and the mounting flange 123 is used to connect with the container to be measured.

[0050] The strengthening mechanism 2 includes a sleeve 21, a connecting flange 22 and a fixing bolt 23. The sleeve 21 is a cylindrical structure. The intermediate pipe 11 is slidably arranged in the sleeve 21. Both ends of the intermediate pipe 11 are respectively abutted against the two fixed flanges 122. The connecting flange 22 is respectively fixedly arranged at both ends of the sleeve 21 and is connected with the fixed flange 122 through the fixing bolt 23. Both the connecting flange 22 and the sleeve 21 are made of a metal material with a hardness greater than that of the communicating pipe 1 and have good toughness. By using the abutment of the sleeve 21 on the side wall of the intermediate pipe 11, the risk of deformation of the intermediate pipe 11 can be reduced, and the service life of this level gauge can be extended.

[0051] During the use of the magnetic flap level gauge, the sleeve 21 shields and protects the intermediate pipe 11, thereby reducing the aging efficiency of the intermediate pipe 11 and further extending the service life of this level gauge. However, in different use conditions, the sleeve 21 can also be designed with a hollow structure to improve the lightweight of the level gauge and observe the appearance defects of the intermediate pipe 11 in time.

[0052] As Figures 5 - 7 shown, three fixing holes 101 are formed on the fixed flange 122. The three fixing holes 101 are arranged in a circumferential array around the axis of the intermediate pipe 11. An easy-to-remove hole 201, a displacement hole 202 and a locking hole 203 are formed on the connecting flange 22. The easy-to-remove hole 201, the displacement hole 202 and the locking hole 203 respectively correspond to the three fixing holes 101 one by one and are connected with them through the fixing bolt 23.

[0053] The axis of the detachable hole 201, the axis of the intermediate pipe 11, and the axis of the mounting flange 123 are located in the same plane. The detachable hole 201 is located on the side of the intermediate pipe 11 away from the mounting flange 123, and the detachable hole 201 penetrates to the side of the connecting flange 22 away from the mounting flange 123. That is, the fixing bolt 23 that cooperates with the detachable hole 201 does not need to pass through from one side of the connecting flange 22 to the other side, and can directly slide into the detachable hole 201 from the circumferential side of the connecting flange 22, or directly slide out from the detachable hole 201. Therefore, the setting of the detachable hole 201 greatly simplifies the disassembly convenience of the sleeve 21 and improves the maintenance efficiency of this liquid level gauge.

[0054] Since the intermediate pipe 11 is located inside the sleeve 21, when replacing the intermediate pipe 11, it is not necessary to completely remove the sleeve 21. It is only necessary to rotate the sleeve 21 to a position where the intermediate pipe 11 will not interfere with other components of the liquid level gauge.

[0055] As Figure 6 shown, the fixing bolt 23 includes a screw rod 231, a screw head 232, and a nut 233. The screw rod 231 penetrates and is slidably arranged in the fixing hole 101, the detachable hole 201, the displacement hole 202, or the locking hole 203. The screw head 232 is fixedly arranged on the screw rod 231, and the nut 233 is connected to the screw rod 231 by thread fit. The nut 233 and the screw head 232 respectively abut against the connecting flange 22 and the fixing flange 122, thereby realizing the fixed connection between the connecting flange 22 and the fixing flange 122.

[0056] As Figure 6 and Figure 7 shown, the displacement hole 202 includes an oblong hole 2021. The oblong hole 2021 is opened on the connecting flange 22, and its length direction is parallel to the axis of the mounting flange 123, that is, the length direction of the oblong hole 2021 is parallel to the length direction of the detachable hole 201. The screw rod 231 can slide in the oblong hole 2021 along the length direction of the oblong hole 2021. When the screw rod 231 moves to the end of the oblong hole 2021, the axis of the screw rod 231 coincides with the center point of the end of the oblong hole 2021; when removing the fixing bolt 23 in the locking hole 203 and loosening the nut 233 connected to the displacement hole 202 and the detachable hole 201, as Figure 8 shown, by sliding the sleeve 21 and the connecting flange 22, the screw rod 231 originally located in the detachable hole 201 can be separated from the detachable hole 201, so that the connecting flange 22 and the fixing flange 122 are only connected by the screw rod 231 in the displacement hole 202. At this time, by rotating the sleeve 21 and the connecting flange 22, the sleeve 21 can be deviated from the fixing flange 122, thereby replacing the intermediate pipe 11 or the magnetic float 4.

[0057] As Figure 8As shown, the diameter of the screw rod 231 is 2R0, the length of the long circular hole 2021 is L1, and the length of the detachable hole 201 is L2. When L1 ≥ L2 + 2R0, the screw rod 231 originally located in the detachable hole 201 can be separated from the detachable hole 201 by using the above sliding operation.

[0058] As Figure 8 shown, the detachable hole 201 is located to the left of the connecting flange 22, and the displacement hole 202 is located to the lower right of the connecting flange 22. The rotation axis of the sleeve 21 is the axis of the screw rod 231 located in the displacement hole 202. At this time, if the sleeve 21 is rotated counterclockwise, interference collision will occur between the circumferential side of the connecting flange 22 and the screw rod 231 on the left. Therefore, the sleeve 21 can only be rotated clockwise.

[0059] When the projection of the intermediate pipe 11 on the horizontal plane intersects with the projection of the end pipe 12 on the horizontal plane, the intermediate pipe 11 will be blocked by the end pipe 12, making it inconvenient to remove the intermediate pipe 11 from the sleeve 21. As Figure 9 shown, since the rotation axis of the sleeve 21 is located below the axis of the end pipe 12, when the sleeve 21 is rotated by a small angle only, the intermediate pipe 11 will still interfere with the fixed flange 122. When the sleeve 21 is rotated to a position below the end pipe 12, the projection of the intermediate pipe 11 on the horizontal plane can be made not to intersect with the projection of the end pipe 12 on the horizontal plane, so as to realize the rapid replacement of the intermediate pipe 11.

[0060] As Figure 9 shown, when the sleeve 21 is rotated to a position below the end pipe 12, it is certain that the sleeve 21 will be rotated to the position as Figure 10 shown. At this time, the straight line connecting the center line of the lower right screw rod 231 and the center point of the sleeve 21 is parallel to the axis of the mounting flange 123, that is, the distance between the right side of the sleeve 21 and the axis of the lower right screw rod 231 is the largest at this time. If you want the sleeve 21 to continue to rotate clockwise, the distance between the mounting flange 123 and the axis of the lower right screw rod 231 needs to be greater than the distance between the right side of the sleeve 21 and the axis of the lower right screw rod 231 at this time.

[0061] As Figure 9 shown, when the sleeve 21 continues to rotate clockwise by a certain angle, the projection of the intermediate pipe 11 on the horizontal plane can be made not to intersect with the projection of the end pipe 12 on the horizontal plane, so as to realize the disassembly, installation and maintenance of the intermediate pipe 11. However, due to the lack of a mechanism for fixing the connecting flange 22 and the sleeve 21, when the intermediate pipe 11 is disassembled and installed, the sleeve 21 may rotate, causing the intermediate pipe 11 during the installation process to rotate and collide with the end pipe 12, resulting in deformation of the intermediate pipe 11 and waste of resources.

[0062] As Figures 8 - 10As shown, the radius of the connecting flange 22 is R1. The distance between the center point of the fixing hole 101 corresponding to the displacement hole 202 and the mounting flange 123 is L3. The minimum distances between the center points at both ends of the oblong hole 2021 and the circumferential side of the connecting flange 22 are L4 and L5 respectively. That is, when the screw 231 moves to both ends of the oblong hole 2021, the minimum distances between the axis of the screw 231 and the circumferential side of the connecting flange 22 are L4 and L5 respectively. Assuming L4 < L5, if L3 ≥ (R1 - L4), then no matter where the lower right screw 231 slides to any position in the oblong hole 2021, it can make Figure 10 the sleeve 21 in continue to rotate clockwise; and if L3 < (R1 - L5), then no matter where the lower right screw 231 slides to any position in the oblong hole 2021, it cannot make Figure 10 the sleeve 21 in continue to rotate clockwise; if (R1 - L5) ≤ L3 < (R1 - L4), then when the screw 231 slides to one end inside the oblong hole 2021, it can make Figure 10 the sleeve 21 in continue to rotate clockwise, and when the screw 231 slides to the other end inside the oblong hole 2021, it cannot make Figure 10 the sleeve 21 in continue to rotate clockwise.

[0063] As shown in Figure 6 and Figure 7 , the displacement hole 202 further includes a positioning groove 2022. The positioning groove 2022 is opened on the top side of the connecting flange 22 and is located at one end of the oblong hole 2021 close to the mounting flange 123. And one of the nuts 233 is rotatably arranged in the positioning groove 2022. That is, if (R1 - L5) ≤ L3 < (R1 - L4), then when the screw 231 slides to the end inside the oblong hole 2021 far from the positioning groove 2022, it can make Figure 10 the sleeve 21 in continue to rotate clockwise, and when the screw 231 slides into the positioning groove 2022, it cannot make Figure 10 the sleeve 21 in continue to rotate clockwise.

[0064] As shown in Figure 10 , first make the lower right screw 231 located at the end inside the oblong hole 2021 far from the positioning groove 2022, and rotate the sleeve 21 clockwise. Then, by sliding the sleeve 21, make the lower right screw 231 move into the positioning groove 2022. At this time, the nut 233 on this screw 231 will slide down from the top side of the connecting flange 22 into the positioning groove 2022, so as to prevent the lower right screw 231 from sliding in the oblong hole 2021 and only allow this screw 231 to rotate in the oblong hole 2021. Finally, rotate the sleeve 21 counterclockwise. As shown in Figure 11 , the side wall of the connecting flange 22 can be made to abut against the mounting flange 123 to realize the limit fixation of the sleeve 21.

[0065] As shown inFigure 10 As shown, since the screw 231 at the lower right is located in the positioning groove 2022, the fixing hole 101 corresponding to the displacement hole 202 coincides with the positioning groove 2022. At this time, the connecting flange 22 abuts against the mounting flange 123. By limiting the specification of the end pipe 12, the projection of the intermediate pipe 11 on the horizontal plane does not intersect with the projection of the end pipe 12 on the horizontal plane at this time, so that the effect of being able to replace the intermediate pipe 11 when the sleeve 21 is limited and fixed can be realized, ensuring that the intermediate pipe 11 does not shake during replacement and will not interfere and collide with the end pipe 12, improving the maintenance efficiency of the intermediate pipe 11.

[0066] As Figure 3 shown, the intermediate pipe 11 includes a pipe body 111 and a limiting ring 112. The pipe body 111 is slidably arranged in the sleeve 21, and its top abuts against the bottom side of the upper fixing flange 122. The limiting ring 112 is fixedly arranged in the sleeve 21 and abuts against the lower end of the pipe body 111 and the top side of the lower fixing flange 122. By providing the limiting ring 112, the bottom end of the pipe body 111 can be supported, preventing the pipe body 111 from automatically falling when the sleeve 21 is rotated, and facilitating the replacement and maintenance of the pipe body 111.

[0067] The inner diameter of the limiting ring 112 is smaller than the inner diameter of the pipe body 111 and the outer diameter of the magnetic float 4, thus preventing the magnetic float 4 from falling into the end pipe 12.

[0068] As Figure 1 and Figure 7 shown, the strengthening mechanism 2 further includes two top plates 24. The two top plates 24 are respectively fixedly arranged at both ends of the flap box 3, respectively abut against the two connecting flanges 22, and the top plate 24 is connected to the fixing flange 122 through a fixing bolt 23.

[0069] As Figure 7 shown, during the use of the magnetic flap level gauge, the flap box 3 abuts against the circumferential side of the sleeve 21. As Figures 8 - 11 shown, since the easy-to-dismantle hole 201 penetrates to the circumferential side of the connecting flange 22, during the replacement process of the intermediate pipe 11, it is not necessary to disassemble the fixing bolt 23 corresponding to the easy-to-dismantle hole 201. Therefore, during the replacement process of the intermediate pipe 11, the position of the flap box 3 can only rotate and cannot move. After the sleeve 21 rotates back to its original position and abuts against the flap box 3, the position of the flap box 3 will not change, so it is not necessary to adjust the position of the flap box 3 again, greatly improving the maintenance efficiency of the level gauge.

[0070] Since the intermediate pipe 11 is made of PVC material and is easily bent under the influence of temperature or pressure, in order to extend the maintenance cycle of the intermediate pipe 11 and reduce the frequency of maintenance of the intermediate pipe 11, the magnetic float 4 is also improved so that the magnetic float 4 can adapt to the intermediate pipe 11 with a smaller degree of bending.

[0071] As shown in Figure 4 and Figure 12 shown, the magnetic float 4 includes two floating cylinders 41 and ball bearings 42. The two floating cylinders 41 are rotatably connected, preferably connected in a universal manner through a universal ball head structure. The ball bearings 42 are arranged to roll on the circumferential side of the floating cylinder 41 and are in rolling connection with the inner wall of the intermediate pipe 11. A plurality of ball bearings 42 are arranged on each floating cylinder 41, and the plurality of ball bearings 42 located on the same floating cylinder 41 are arranged in a circumferential array around the axis of the floating cylinder 41. When the intermediate pipe 11 is bent, the two ends of the magnetic float 4 can rotate correspondingly, so that the magnetic float 4 can pass through the bent intermediate pipe 11.

[0072] In this embodiment, the operation method for replacing the intermediate pipe 11 is as follows: First, disconnect the connection between the two end pipes 12 and the container to be measured, and remove the fixing bolts 23 in the locking holes 203. Loosen the nuts 233 in the easy-to-remove holes 201 and the displacement holes 202, and slide the sleeve 21. As Figure 8 shown, make the screw 231 in the easy-to-remove hole 201 disengage from the easy-to-remove hole 201, and then rotate the sleeve 21 clockwise in the manner shown in Figure 9 and Figure 10 shown. Then, by sliding the sleeve 21, move the screw 231 in the displacement hole 202 to the positioning groove 2022, make the nut 233 on the screw 231 snap into the positioning groove 2022, and rotate the sleeve 21 counterclockwise so that the connecting flange 22 abuts against the mounting flange 123 in the manner shown in Figure 11 . Finally, replace the pipe body 111. After the replacement is completed, reverse the above steps to reset the liquid level gauge.

[0073] Embodiment 2

[0074] As Figures 13 - 15 shown, different from Embodiment 1, the sleeve 21 is not provided in the strengthening mechanism 2, the intermediate pipe 11 is not configured to include a pipe body 111 and a limiting ring 112, and the shape of the hole on the connecting flange 22 that cooperates with the fixing bolt 23 is different.

[0075] Specifically, as Figure 13 and Figure 14 shown, the strengthening mechanism 2 includes a connecting flange 22 and fixing bolts 23. The connecting flanges 22 are respectively fixedly arranged at both ends of the intermediate pipe 11 and are connected to the fixing flange 122 through the fixing bolts 23, and the connecting flange 22 is made of PVC material. After the intermediate pipe 11 is bent, the intermediate pipe 11 can be directly disassembled and replaced.

[0076] The flap box 3 and the top plate 24 are both made of a metal material with a harderness greater than that of the connecting tube 1. The flap box 3 abuts against the circumferential side of the intermediate tube 11 to prevent the intermediate tube 11 from bending. The top plates 24 are fixedly arranged at both ends of the flap box 3. The two top plates 24 respectively abut against the connecting flanges 22 at both ends of the intermediate tube 11, thereby axially stretching the intermediate tube 11, further preventing the intermediate tube 11 from bending and extending the service life of the intermediate tube 11.

[0077] like Figure 15 As shown, two easily removable holes 201 and one locking hole 203 are provided on the connecting flange 22. Relative to Example 1, the displacement hole 202 is replaced by the easily removable hole 201, and the directions of the two easily removable holes 201 are consistent, both penetrating the side of the connecting flange 22 away from the locking hole 203. When the fixing bolt 23 in the locking hole 203 is removed and the other two nuts 233 are loosened, the intermediate tube 11 and the connecting flange 22 can be quickly removed by sliding the intermediate tube 11, thereby improving the maintenance efficiency of the liquid level meter.

[0078] At the same time, during the process of replacing the middle tube 11, the flap box 3 can only rotate but cannot slide. When the middle tube 11 is replaced and abuts against the flap box 3, the position of the flap box 3 remains unchanged, and there is no need to adjust the flap box 3, thereby improving the maintenance efficiency of the liquid level meter.

[0079] In this embodiment, the method for replacing the intermediate tube 11 is as follows: first remove the fixing bolt 23 in the locking hole 203, loosen the other two nuts 233, then slide the intermediate tube 11, remove the intermediate tube 11, and finally reverse the above steps to install the new intermediate tube 11 between the two end tubes 12.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic flap level gauge for corrosive media, characterized in that: It includes a connecting pipe (1), a strengthening mechanism (2), a flap box (3) and a magnetic float (4). Among them, the connecting pipe (1) includes an intermediate pipe (11) and two end pipes (12). The two end pipes (12) are respectively detachably fixed at both ends of the intermediate pipe (11) and are in communication with its interior. Both the end pipe (12) and the intermediate pipe (11) are made of PVC material; the strengthening mechanism (2) is used to abut against the intermediate pipe (11) to keep the intermediate pipe (11) in a straight state; the flap box (3) is arranged on the circumference of the intermediate pipe (11); the magnetic float (4) is slidably arranged in the intermediate pipe (11).

2. The magnetic flap level gauge for corrosive medium according to claim 1, characterized in that: The end pipe (12) includes an L-shaped pipe (121), a fixing flange (122) and a mounting flange (123). The strengthening mechanism (2) includes a sleeve (21), a connecting flange (22) and a fixing bolt (23). Among them, the fixing flange (122) and the mounting flange (123) are respectively fixedly arranged at both ends of the L-shaped pipe (121); the intermediate pipe (11) is slidably arranged in the sleeve (21), and its two ends are respectively abutted against the two fixing flanges (122); the connecting flanges (22) are respectively fixedly arranged at both ends of the sleeve (21) and are connected to the fixing flange (122) through the fixing bolt (23). Both the connecting flange (22) and the sleeve (21) are made of a metal material with a hardness greater than that of the connecting pipe (1).

3. The magnetic flap level gauge for corrosive medium according to claim 2, wherein: Three fixing holes (101) are formed in the fixing flange (122), and the three fixing holes (101) are arranged in a circumferential array around the axis of the intermediate pipe (11); The connecting flange (22) is provided with a detachable hole (201), a displacement hole (202) and a locking hole (203). The detachable hole (201), the displacement hole (202) and the locking hole (203) respectively correspond to the three fixing holes (101) one by one and are connected to them through the fixing bolt (23); the axis of the detachable hole (201), the axis of the intermediate pipe (11) and the axis of the mounting flange (123) are located in the same plane, and the detachable hole (201) is located on the side of the intermediate pipe (11) away from the mounting flange (123), and the detachable hole (201) penetrates to the side of the connecting flange (22) away from the mounting flange (123).

4. The magnetic flap level gauge for corrosive medium according to claim 3, wherein: The displacement hole (202) includes an oblong hole (2021), and the oblong hole (2021) is formed in the connecting flange (22), and its length direction is parallel to the axis of the mounting flange (123); The fixing bolt (23) includes a screw rod (231), a screw head (232) and a nut (233). The screw rod (231) passes through and is slidably arranged in the fixing hole (101), the detachable hole (201), the displacement hole (202) or the locking hole (203). The screw head (232) is fixedly arranged on the screw rod (231). The nut (233) is connected to the screw rod (231) by thread fit and abuts against the connecting flange (22) and the fixing flange (122) respectively with the screw head (232). The diameter of the screw rod (231) is 2R0, the length of the oblong hole (2021) is L1, and the length of the detachable hole (201) is L2. Wherein, L1≥(L2 + 2R0).

5. The magnetic flap level gauge for corrosive medium according to claim 4, characterized in that: The displacement hole (202) further includes a positioning groove (2022). The positioning groove (2022) is opened on the top side of the connecting flange (22) and is located at one end of the oblong hole (2021) close to the mounting flange (123), and one of the nuts (233) is rotatably arranged in the positioning groove (2022). The radius of the connecting flange (22) is R1, the distance between the center point of the fixing hole (101) corresponding to the displacement hole (202) and the mounting flange (123) is L3, and the minimum distances between the center points at both ends of the oblong hole (2021) and the circumferential side of the connecting flange (22) are L4 and L5 respectively. Wherein, L4 < L5, and (R1 - L5) ≤ L3 < (R1 - L4). The fixing hole (101) corresponding to the displacement hole (202) coincides with the positioning groove (2022), and when the connecting flange (22) abuts against the mounting flange (123), the projections of the intermediate pipe (11) and the end pipe (12) on the horizontal plane do not intersect.

6. The magnetic flap level gauge for corrosive medium according to claim 2, characterized in that: The intermediate pipe (11) includes a pipe body (111) and a limiting ring (112), wherein, The pipe body (111) is slidably arranged in the sleeve (21), and its top end abuts against the upper fixing flange (122). The limiting ring (112) is fixedly arranged in the sleeve (21) and abuts against the pipe body (111) and the lower fixing flange (122).

7. A magnetic flap level gauge for corrosive media according to claim 1, characterized in that: The end pipe (12) includes an L-shaped pipe (121), a fixing flange (122) and a mounting flange (123), and the strengthening mechanism (2) includes a connecting flange (22) and a fixing bolt (23), wherein, The fixing flange (122) and the mounting flange (123) are respectively fixedly arranged at both ends of the L-shaped pipe (121). The connecting flange (22) is respectively fixedly arranged at both ends of the intermediate pipe (11) and is connected to the fixing flange (122) by the fixing bolt (23), and the connecting flange (22) is made of PVC material.

8. A magnetic flap level gauge for corrosive media according to claim 7, characterized in that: The flap box (3) is made of a metal material with a hardness greater than that of the communicating pipe (1) and abuts against the circumferential side of the intermediate pipe (11).

9. A magnetic flap level gauge for corrosive media according to any one of claims 2 - 8, characterized in that: The strengthening mechanism (2) further includes two top plates (24), the two top plates (24) are respectively fixedly arranged at two ends of the flap box (3), and respectively abut against the two connecting flanges (22), and the top plate (24) is connected to the fixed flange (122) through the fixing bolt (23).

10. A magnetic flap level gauge for corrosive media according to any one of claims 1-8, characterized in that: The magnetic float (4) includes two floating cylinders (41) and ball bearings (42), wherein, the two floating cylinders (41) are rotatably connected to each other; the ball bearings (42) are arranged to roll on the circumferential side of the floating cylinder (41) and are in rolling connection with the inner wall of the intermediate pipe (11), and a plurality of the ball bearings (42) are arranged on each floating cylinder (41), and the plurality of ball bearings (42) located on the same floating cylinder (41) are arranged in a circumferential array around the axis of the floating cylinder (41).

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