A magnetic flap level gauge for corrosive media

Abstract

The present invention relates to the technical field of magnetic flap level gauges, and proposes a magnetic flap level gauge for corrosive media, comprising a connecting pipe, a reinforcement mechanism, a flap box, and a magnetic float. The connecting pipe comprises an intermediate pipe and two end pipes, the two end pipes being detachably fixed to the two ends of the intermediate pipe and connected to the interior thereof, the end pipes and the intermediate pipe being both made of PVC material; the reinforcement mechanism being used to support the intermediate pipe; the flap box being arranged on the circumference of the intermediate pipe; and the magnetic float being slidably arranged in the intermediate pipe. By arranging an intermediate pipe and two end pipes, and making the intermediate pipe and the two end pipes both made of PVC material, the present invention can not only improve the corrosion resistance of the liquid level gauge, but also can utilize the disassembly and assembly of the intermediate pipe to quickly solve the problem when the intermediate pipe is deformed or the magnetic float fails. By arranging the reinforcement mechanism, the anti-deformation ability of the intermediate pipe can be improved, thereby ensuring the normal use of the liquid level gauge.

Description

Technical Field

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

[0002] The magnetic flap level gauge is a liquid level measuring instrument that works on the principle of magnetic coupling. It is usually composed of a connecting pipe, a float, a magnetic flap and other parts. The float moves up and down with the change of liquid level, driving the magnetic flap to flip, thereby intuitively displaying the liquid level height.

[0003] In the fields of chemical industry, petroleum, pharmaceuticals, etc., the media detected by magnetic flap level gauges are usually corrosive. In order to ensure the safe operation of magnetic flap level gauges, corresponding protective mechanisms need to be set up. For example, the utility model with announcement number CN216524271U discloses a highly corrosion-resistant lined flap level gauge, which has a Teflon coating on the inner wall of the level tube, and uses the Teflon coating to improve the corrosion resistance of the level gauge. In actual application, as the use 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 fall off, resulting in the failure of the corrosion resistance of the magnetic flap level gauge. In order to keep the magnetic flap level gauge's corrosion resistance for a long time, the existing technology will directly replace the material of the magnetic flap level gauge with an anti-corrosion material such as PVC.

[0004] However, the toughness of anti-corrosion materials such as PVC is low. Especially when the length of the magnetic flap level gauge is long, it is easy to bend and deform under the influence of pressure and temperature, 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 proposes a magnetic flap level gauge for corrosive media, which can improve the anti-deformation ability of the PVC material magnetic flap level gauge and facilitate the replacement of the deformed intermediate tube to ensure the normal use of the magnetic flap level gauge.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a magnetic flap level gauge for corrosive media, including a connecting pipe, a reinforcement mechanism, a flap box and a magnetic float, wherein the connecting pipe includes an intermediate pipe and two end pipes, and the two end pipes are detachably fixed to the two ends of the intermediate pipe and are connected to the interior thereof, and the end pipes and the intermediate pipe are both made of PVC material; the reinforcement mechanism is used to support the intermediate pipe to keep the intermediate pipe in a straight state; the flap box is arranged on the peripheral side of the intermediate pipe; and the magnetic float is slidably arranged in the intermediate pipe.

[0007] On the basis of the above technical solution, preferably, the end pipe includes an L-shaped pipe, a fixed flange and a mounting flange, and the reinforcement mechanism includes a sleeve, a connecting flange and a fixing bolt, wherein the fixing 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 its two ends are respectively abutted against the two fixing flanges; the connecting flanges are respectively fixedly arranged at both ends of the sleeve, and are connected to the fixing flanges by the fixing bolts, and the connecting flange and the sleeve are both made of a metal material with a hardness greater than that of the connecting pipe.

[0008] Further preferably, three fixing holes are provided on the fixing flange, and the three fixing holes are arranged in a circular array around the axis of the intermediate tube; the connecting flange is provided with an easily removable hole, a shift hole and a locking hole, and the easily removable hole, the shift hole and the locking hole correspond to the three fixing holes one by one, and are connected thereto by the fixing bolts; the axis of the easily removable hole, the axis of the intermediate tube and the axis of the mounting flange are located in the same plane, and the easily removable hole is located on the side of the intermediate tube away from the mounting flange, and the easily removable hole passes through the side of the connecting flange away from the mounting flange.

[0009] Further preferably, the displacement hole includes an oblong hole, which is opened on the connecting flange, and its length direction is parallel to the axis of the mounting flange; the fixing bolt includes a screw rod, a screw head and a nut, and the screw rod passes through and is slidably arranged in the fixing hole, the easily removable hole, the displacement hole or the locking hole; the screw head is fixedly arranged on the screw rod; the nut is connected to the screw rod by threaded fitting, and is respectively abutted against the connecting flange and the fixing 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 easily removable hole is L2, wherein L1≥(L2+2R0).

[0010] More preferably, the displacement hole also includes a positioning groove, which is opened 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 set 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 of the two ends of the oblong hole and the circumferential side of the connecting flange are L4 and L5 respectively; wherein, 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 is in contact with 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 tube includes a tube body and a limiting ring, wherein the tube body is slidably arranged in the sleeve, and its top end is in abutment against the fixed flange located above; the limiting ring is fixedly arranged in the sleeve, and is in abutment against the tube body and the fixed flange located below.

[0012] Based on the above technical solution, preferably, the end pipe includes an L-shaped pipe, a fixing flange and a mounting flange, and the reinforcement mechanism includes a connecting flange and a fixing bolt, wherein the fixing 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 fixing flange through the fixing bolts, and the connecting flanges are made of PVC material.

[0013] More preferably, the flap box is made of a metal material having a harderness than that of the connecting pipe, and is in contact with the circumference of the intermediate pipe.

[0014] On the basis of the above technical solution, preferably, the reinforcement mechanism also includes two top plates, which are respectively fixed at the two ends of the flip box and respectively abut against the two connecting flanges, and the top plates are connected to the fixing flanges through the fixing bolts.

[0015] On the basis of the above technical solution, preferably, the magnetic float includes two floats and balls, wherein the two floats are rotatably connected; the balls are rollingly arranged on the circumferential side of the floats and are rollingly connected to the inner wall of the intermediate tube, and a plurality of balls are arranged on each float, and the plurality of balls on the same float are arranged in a circular array around the axis of the float.

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

[0017] (1) By setting up an intermediate tube and two end tubes, and making the intermediate tube and the two end tubes all made of PVC material, not only can the anti-corrosion performance of the liquid level gauge be improved, but also the problem of deformation of the intermediate tube or failure of the magnetic float can be quickly solved by disassembling and assembling the intermediate tube. By setting up a reinforcement mechanism, the anti-deformation ability of the intermediate tube can be improved, thereby ensuring the normal use of the liquid level gauge.

[0018] (2) By setting up two strengthening mechanisms, the liquid level meter can be adapted to different operating conditions, thereby improving the adaptability of the liquid level meter.

[0019] (3) By setting up easy-to-remove holes, shift holes and locking holes, the connecting flange can be easily disassembled, thereby improving the replacement efficiency of the intermediate tube and magnetic float and saving the maintenance time of the liquid level gauge.

[0020] (4) By setting the displacement hole to include an oblong hole and a positioning groove, allowing the nut to rotate with the positioning groove, and limiting the specifications of the strengthening mechanism, the maintenance convenience of the intermediate tube can be further improved and the replacement effect of the intermediate tube can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 The present invention is a three-dimensional diagram of a magnetic flap level gauge for corrosive media.

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

[0024] Figure 3 for Figure 2 A is an enlarged view of Example 1.

[0025] Figure 4 The present invention is a cross-sectional view of a casing in a magnetic flap level gauge for corrosive media.

[0026] Figure 5 This is a stereoscopic view of the middle end tube of a magnetic flap level gauge for corrosive media according to the present invention.

[0027] Figure 6 This is an exploded view of the connecting flange of a magnetic flap level gauge for corrosive media in Example 1 of the present invention.

[0028] Figure 7 This is a stereoscopic view of the connection flange of a magnetic flap level gauge for corrosive media in Example 1 of the present invention.

[0029] Figure 8 This is a cross-sectional view of a magnetic flap level gauge for corrosive media in Example 1 of the present invention, showing a state where the easily removable hole is separated from the fixing bolt.

[0030] Figure 9 This is a cross-sectional view of a magnetic flap level gauge for corrosive media in Example 1 of the present invention, showing Figure 8 In this state, the sleeve is rotated clockwise.

[0031] Figure 10This is a cross-sectional view of a magnetic flap level gauge for corrosive media in Example 1 of the present invention, showing Figure 9 In this state, the sleeve is rotated clockwise.

[0032] Figure 11 This is a cross-sectional view of a magnetic flap level gauge for corrosive media in Example 1 of the present invention, showing Figure 10 In this state, the sleeve is allowed to slide relative to the screw and rotate counterclockwise.

[0033] Figure 12 The present invention is a cross-sectional view of a magnetic float in a magnetic flap level gauge for corrosive media.

[0034] Figure 13 This is a partial side view of a magnetic flap level gauge for corrosive media in Example 2 of the present invention.

[0035] Figure 14 for Figure 2 A is an enlarged view of Example 2.

[0036] Figure 15 This is an exploded view of the connecting flange in Example 2 of a magnetic flap level gauge for corrosive media of the present invention.

[0037] Among them: 1. Connecting pipe; 11. Intermediate pipe; 12. End pipe; 111. Pipe body; 112. Limiting ring; 121. L-shaped pipe; 122. Fixing flange; 123. Mounting flange; 101. Fixing hole; 2. Reinforcement mechanism; 21. Casing; 22. Connecting flange; 23. Fixing bolt; 24. Top plate; 231. Screw; 232. Screw head; 233. Nut; 201. Easy-to-remove hole; 202. Shifting hole; 203. Locking hole; 2021. Oblong hole; 2022. Positioning groove; 3. Flip box; 4. Magnetic float; 41. Float; 42. Ball. DETAILED DESCRIPTION

[0038] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example 1

[0040] A magnetic flap level gauge for corrosive media of the present invention comprises a connecting pipe 1, a reinforcing mechanism 2, a flap box 3 and a magnetic float 4. The connecting pipe 1 has one high and one low end and is connected to a container to be measured. The liquid medium in the container to be measured flows into the connecting pipe 1, and the liquid level of the liquid medium in the connecting pipe 1 is the same as the liquid level of the liquid medium in the container to be measured. At the same time, the magnetic float 4 floats on the liquid level of the liquid medium due to buoyancy and rises and falls with the fluctuation of the liquid level of the liquid medium.

[0041] There are multiple flip columns inside the flip box 3, which are painted in two colors. A magnetic component is set inside the magnetic float 4. When the magnetic float 4 rises to a certain height with the liquid level, it can drive the flip columns below the corresponding height in the flip box 3 to rotate, thereby using the difference in color to display the liquid level height of the liquid medium in the container to be tested.

[0042] In the fields of chemical industry, petroleum, pharmaceuticals, electric power, etc., corrosive solutions are widely used. Traditional magnetic flap level gauges are mostly made of metal materials such as stainless steel, carbon steel or aluminum alloy. These materials are prone to oxidation, corrosion or pitting in corrosive media such as strong acid, strong alkali, salt spray, etc., causing equipment failure.

[0043] In existing technology, anti-corrosion coatings (such as Teflon and ceramic coatings) are often applied to improve the corrosion resistance of magnetic level gauges. However, the coating has a weak bond with the substrate and is easily peeled off due to temperature fluctuations, mechanical vibration, or long-term media erosion, which accelerates localized corrosion of the magnetic level gauge.

[0044] To address corrosion issues, some magnetic level gauges use plastics such as PVC and PP instead of metal. However, plastics have poor mechanical properties, are prone to deformation and aging, and lack high-temperature and pressure resistance. Especially when the magnetic level gauge is long, it can bend under external forces, temperature, or pressure fluctuations. This can cause the magnetic float 4 to become stuck or the flap to malfunction, affecting its proper operation.

[0045] In order to solve the above problems, the present invention configures the connecting pipe 1 to include an intermediate pipe 11 and two end pipes 12. The two end pipes 12 are arranged one high and one low, and are connected to the container to be tested. The intermediate pipe 11 is detachably fixed between the two end pipes 12 and is connected to the interior of the container. The end pipes 12 and the intermediate pipe 11 are both made of PVC material. The length of the end pipe 12 is very small and not easy to deform. When the longer 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 providing a detachable intermediate tube 11, not only the maintenance cost of the magnetic flap level gauge can be reduced, but also the maintenance or replacement of the magnetic float 4 can be facilitated, thereby improving the maintenance convenience of the magnetic flap level gauge.

[0047] The end tube 12 is usually L-shaped or T-shaped. The connection between the end tube 12 and the middle tube 11 is prone to burrs, which may cause the magnetic float 4 to get stuck in the end tube 12. Figure 1 and Figure 2 As shown, the flap box 3 is set on the peripheral side of the middle tube 11, so that the magnetic float 4 is only slidably set in the middle tube 11, and does not slide into the end tube 12 and the connection between the end tube 12 and the middle tube 11.

[0048] The reinforcing mechanism 2 is used to support the intermediate tube 11 so as to keep the intermediate tube 11 in a straight state, thereby reducing the risk of bending of the intermediate tube 11 and extending the service life of the magnetic flap level gauge.

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

[0050] The reinforcing mechanism 2 includes a sleeve 21, a connecting flange 22 and a fixing bolt 23. The sleeve 21 is a cylindrical structure. The intermediate tube 11 is slidably arranged in the sleeve 21. The two ends of the intermediate tube 11 are respectively abutted against the two fixing flanges 122. The connecting flanges 22 are respectively fixed at the two ends of the sleeve 21 and are connected to the fixing flanges 122 by fixing bolts 23. The connecting flange 22 and the sleeve 21 are both made of a metal material with a hardness greater than that of the connecting tube 1 and have good toughness. The sleeve 21 is used to support the side wall of the intermediate tube 11, which can reduce the risk of deformation of the intermediate tube 11 and extend the service life of the liquid level gauge.

[0051] During use, the sleeve 21 shields and protects the intermediate tube 11, thereby reducing the aging rate of the intermediate tube 11 and further extending the service life of the level gauge. However, in different operating conditions, the sleeve 21 can also be hollowed out to increase the weight of the level gauge and to promptly detect any defects in the appearance of the intermediate tube 11.

[0052] like Figure 5-Figure 7 As shown, three fixing holes 101 are provided on the fixing flange 122, and the three fixing holes 101 are arranged in a circular array around the axis of the intermediate tube 11. The connecting flange 22 is provided with an easily removable hole 201, a shift hole 202 and a locking hole 203. The easily removable hole 201, the shift hole 202 and the locking hole 203 correspond to the three fixing holes 101 one by one, and are connected thereto by fixing bolts 23.

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

[0054] Since the intermediate tube 11 is located in the sleeve 21 , when replacing the intermediate tube 11 , it is not necessary to completely remove the sleeve 21 . The sleeve 21 can be rotated to a position where the intermediate tube 11 does not interfere with other components of the liquid level gauge.

[0055] like Figure 6 As shown, 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 set in the fixing hole 101, the easily removable hole 201, the shift hole 202 or the locking hole 203. The screw head 232 is fixedly set on the screw rod 231. The nut 233 is connected to the screw rod 231 through threaded fitting. The nut 233 and the screw head 232 are respectively abutted against the connecting flange 22 and the fixing flange 122, thereby realizing a fixed connection between the connecting flange 22 and the fixing flange 122.

[0056] like Figure 6 and Figure 7 As shown, the displacement hole 202 includes an oblong hole 2021, which 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 easily removable hole 201, and the screw 231 can slide in the oblong hole 2021 along the length direction of the oblong hole 2021. When the screw 231 moves to the end of the oblong hole 2021, the axis of the screw 231 coincides with the center point of the end of the oblong hole 2021; when the fixing bolt 23 in the locking hole 203 is removed and the nut 233 connected to the displacement hole 202 and the easily removable hole 201 is loosened, as shown in FIG. Figure 8 As shown, the sliding sleeve 21 and the connecting flange 22 can be used to separate the screw 231 originally located in the easily removable hole 201 from the easily removable hole 201, so that the connecting flange 22 and the fixed flange 122 are connected only by the screw 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 fixed flange 122, thereby replacing the intermediate tube 11 or the magnetic float 4.

[0057] like Figure 8As shown, the diameter of the screw 231 is 2R0, the length of the oblong hole 2021 is L1, and the length of the easily removable hole 201 is L2. When L1≥L2+2R0, the above-mentioned sliding operation can be used to separate the screw 231 originally located in the easily removable hole 201 from the easily removable hole 201.

[0058] like Figure 8 As shown, the easily removable hole 201 is located on the left side of the connecting flange 22, and the shift hole 202 is located at the lower right side of the connecting flange 22. The rotation axis of the sleeve 21 is the axis of the screw 231 located in the shift hole 202. At this time, if the sleeve 21 is rotated counterclockwise, the peripheral side of the connecting flange 22 will interfere with and collide with the screw 231 on the left, so the sleeve 21 can only be rotated clockwise.

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

[0060] like Figure 9 As shown, rotate the sleeve 21 to a position below the end pipe 12. Figure 10 At this point, the center line of the lower right screw 231 and the straight line containing the center point of the sleeve 21 are 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 231 is the largest. If the sleeve 21 is to continue to rotate clockwise, the distance between the mounting flange 123 and the axis of the lower right screw 231 needs to be larger than the distance between the right side of the sleeve 21 and the axis of the lower right screw 231.

[0061] like Figure 9 As shown, if the sleeve 21 continues to rotate clockwise a certain angle, the projection of the intermediate tube 11 on the horizontal plane will not intersect with the projection of the end tube 12 on the horizontal plane, thereby facilitating the removal and maintenance of the intermediate tube 11. However, due to the lack of a mechanism to secure the connecting flange 22 and the sleeve 21, the sleeve 21 may rotate during the removal and installation of the intermediate tube 11, causing the intermediate tube 11 to rotate during installation and collide with the end tube 12, resulting in deformation of the intermediate tube 11 and a waste of resources.

[0062] like 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, and the minimum distances between the center points of the two ends of the oblong hole 2021 and the circumference of the connecting flange 22 are L4 and L5 respectively. That is, when the screw rod 231 moves to the two ends of the oblong hole 2021, the minimum distances between the axis of the screw rod 231 and the circumference of the connecting flange 22 are L4 and L5 respectively; assuming that L4 is less than L5, if L3 ≥ (R1-L4), then no matter where the screw rod 231 slides to the oblong hole 2021, it can make Figure 10 The sleeve 21 in the middle continues to rotate clockwise; and if L3 < (R1-L5), the screw rod 231 on the lower right side cannot slide to any position of the oblong hole 2021. Figure 10 The sleeve 21 in the middle continues to rotate clockwise; if (R1-L5)≤L3<(R1-L4), when the screw 231 slides to one end of the oblong hole 2021, Figure 10 The sleeve 21 in the middle continues to rotate clockwise, and when the screw 231 slides to the other end of the oblong hole 2021, it cannot be Figure 10 The sleeve 21 in the middle continues to rotate clockwise.

[0063] like Figure 6 and Figure 7 As shown, the displacement hole 202 further includes a positioning groove 2022, which 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), when the screw 231 slides to the end of the oblong hole 2021 away from the positioning groove 2022, it can allow Figure 10 The sleeve 21 in the middle continues to rotate clockwise, and when the screw 231 slides into the positioning groove 2022, it cannot be Figure 10 The sleeve 21 in the middle continues to rotate clockwise.

[0064] like Figure 10 As shown, first, the lower right screw 231 is located in the oblong hole 2021 at one end away from the positioning groove 2022, and the sleeve 21 is rotated clockwise. Then, the sleeve 21 is slid to move the lower right screw 231 into the positioning groove 2022. At this time, the nut 233 on the screw 231 will slide downward from the top side of the connecting flange 22 into the positioning groove 2022, thereby preventing the lower right screw 231 from sliding in the oblong hole 2021 and allowing only the screw 231 to rotate in the oblong hole 2021. Finally, the sleeve 21 is rotated counterclockwise. Figure 11 As shown, the side wall of the connecting flange 22 can be abutted against the mounting flange 123 to achieve position limiting and fixing of the sleeve 21 .

[0065] like Figure 10 As shown, since the screw rod 231 on the lower right is located in the positioning groove 2022, the fixing hole 101 corresponding to the shift hole 202 coincides with the positioning groove 2022. At this time, the connecting flange 22 is in contact with the mounting flange 123. By limiting the specifications 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. This can achieve the effect of being able to replace the intermediate pipe 11 when the sleeve 21 is limited and fixed, so as to ensure that the intermediate pipe 11 will not shake during replacement, and will not interfere with or collide with the end pipe 12, thereby improving the maintenance efficiency of the intermediate pipe 11.

[0066] like Figure 3 As shown, the intermediate tube 11 includes a tube body 111 and a retaining ring 112. The tube body 111 is slidably disposed within the sleeve 21, with its top end abutting against the bottom side of the upper fixing flange 122. The retaining ring 112 is fixedly disposed within the sleeve 21 and abuts against the lower end of the tube body 111 and the top side of the lower fixing flange 122. The retaining ring 112 supports the bottom end of the tube body 111, preventing the tube body 111 from automatically falling when the sleeve 21 is rotated, and facilitating replacement and maintenance of the tube body 111.

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

[0068] like Figure 1 and Figure 7 As shown, the reinforcing mechanism 2 further includes two top plates 24 , which are respectively fixedly arranged at both ends of the flip box 3 and respectively abut against the two connecting flanges 22 , and the top plates 24 are connected to the fixing flanges 122 via fixing bolts 23 .

[0069] like Figure 7 As shown, during the use of the magnetic flap level gauge, the flap box 3 is in contact with the peripheral side of the sleeve 21. Figures 8-11 As shown, since the easily removable hole 201 penetrates the circumferential side of the connecting flange 22, during the replacement of the intermediate tube 11, there is no need to remove the fixing bolts 23 corresponding to the easily removable hole 201. Therefore, during the replacement of the intermediate tube 11, the position of the flip box 3 can only be rotated but not moved. When the sleeve 21 is rotated back to its original position and abuts against the flip box 3, the position of the flip box 3 will not change, so there is no need to adjust the position of the flip box 3, which greatly improves the maintenance efficiency of the liquid level meter.

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

[0071] like Figure 4 and Figure 12 As shown, the magnetic float 4 includes two floats 41 and balls 42. The two floats 41 are rotationally connected, preferably through a universal ball head structure. The balls 42 are rollingly arranged on the circumferential side of the floats 41 and are rollingly connected to the inner wall of the intermediate tube 11. Each float 41 is provided with a plurality of balls 42. The plurality of balls 42 located on the same float 41 are arranged in a circular array around the axis of the float 41. When the intermediate tube 11 bends, the two ends of the magnetic float 4 can rotate accordingly, so that the magnetic float 4 can pass through the bent intermediate tube 11.

[0072] In this embodiment, the operation method for replacing the intermediate tube 11 is as follows: first, disconnect the two end tubes 12 from the container to be tested, 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. Figure 8 As shown, the screw rod 231 in the easily detachable hole 201 is separated from the easily detachable hole 201, and then Figure 9 and Figure 10 The sleeve 21 is rotated clockwise in the manner shown, and then the sleeve 21 is slid to move the screw 231 in the displacement hole 202 into the positioning groove 2022, so that the nut 233 on the screw 231 is engaged with the positioning groove 2022, and the sleeve 21 is rotated counterclockwise to make the connecting flange 22 rotate as shown. Figure 11 The tube body 111 is finally replaced. After the replacement is completed, the above steps are reversed to reset the liquid level gauge.

[0073] Example 2

[0074] like Figure 13-15 As shown, different from Example 1, the sleeve 21 is not provided in the reinforcing mechanism 2, the intermediate tube 11 is not provided to include the tube body 111 and the limiting ring 112, and the shape of the hole on the connecting flange 22 that matches the fixing bolt 23 is different.

[0075] Specifically, such as Figure 13 and Figure 14 As shown, the reinforcement mechanism 2 includes connecting flanges 22 and fixing bolts 23. The connecting flanges 22 are fixedly mounted at both ends of the intermediate tube 11 and connected to the fixing flanges 122 via fixing bolts 23. The connecting flanges 22 are made of PVC. If the intermediate tube 11 bends, it can be simply removed 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 is in contact with 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 support 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 a locking hole 203 are provided on the connecting flange 22. Compared with Example 1, the shift hole 202 is replaced by the easily removable hole 201, and the directions of the two easily removable holes 201 are consistent, both passing through 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 gauge.

[0078] At the same time, during the replacement of the intermediate tube 11, the flip box 3 can only rotate and cannot slide. When the intermediate tube 11 is replaced and abuts against the flip box 3, the position of the flip box 3 remains unchanged, and there is no need to adjust the flip 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 to 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 scope of protection of the present invention.

Claims

1. A magnetic flap level gauge for corrosive media, characterized by: It includes a connecting pipe, a reinforcing mechanism, a flip box and a magnetic float, wherein: The connecting pipe includes a middle pipe and two end pipes. The two end pipes are detachably fixed to the two ends of the middle pipe and are connected to the interior of the middle pipe. Both the end pipes and the middle pipe are made of PVC material. The reinforcing mechanism is used to support the middle tube to keep it straight; The flap box is arranged on the peripheral side of the intermediate tube; The magnetic float is slidingly arranged in the middle tube; The end pipe includes an L-shaped pipe, a fixing flange and a mounting flange, and the reinforcement mechanism includes a sleeve, a connecting flange and fixing bolts, wherein: The fixed flange and the mounting flange are fixedly arranged at both ends of the L-shaped pipe respectively; The middle pipe is slidably arranged in the sleeve, and its two ends are respectively in contact with the two fixed flanges; The connecting flanges are fixedly arranged at both ends of the sleeve and connected to the fixed flanges by fixing bolts, and the connecting flanges and the sleeve are made of a metal material with a harderness greater than that of the connecting pipe; The fixing flange is provided with three fixing holes, which are arranged in a circular array around the axis of the intermediate tube; The connecting flange is provided with an easy-to-remove hole, a shift hole and a locking hole, which correspond to the three fixing holes one by one and are connected to them by fixing bolts; The axis of the easy-to-remove hole, the axis of the intermediate pipe, and the axis of the mounting flange are located in the same plane, and the easy-to-remove hole is located on the side of the intermediate pipe away from the mounting flange, and the easy-to-remove hole penetrates to the side of the connecting flange away from the mounting flange; The displacement hole comprises an oblong hole, which is provided on the connecting flange and has a length direction parallel to the axis of the mounting flange; The fixing bolt includes a screw rod, a screw head and a nut. The screw rod passes through and is slidably arranged in the fixing hole, the easy-to-remove hole, the shift hole or the locking hole; the screw head is fixedly arranged on the screw rod; the nut is connected to the screw rod through threaded engagement, and is respectively abutted against the connecting flange and the fixing flange with the screw head; The diameter of the screw is 2R0, the length of the oblong hole is L1, and the length of the easily removable hole is L2, where L1 ≥ (L2 + 2R0); The displacement hole also includes a positioning groove, which is opened 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 shift hole and the mounting flange is L3. The minimum distances between the center points of the two ends of the oblong hole and the circumference of the connecting flange are L4 and L5 respectively; where L4 < L5, and (R1-L5) ≤ L3 < (R1-L4); The fixing hole corresponding to the shift 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.

2. A magnetic flap level gauge for corrosive media according to claim 1, characterized in that: The intermediate tube includes a tube body and a limiting ring, wherein: The tube body is slidably arranged in the sleeve, and its top end abuts against the fixed flange located above; The limiting ring is fixedly arranged in the sleeve and abuts against the pipe body and the fixing flange located below.

3. The magnetic flap level gauge for corrosive media according to claim 1, characterized in that: The end pipe includes an L-shaped pipe, a fixing flange and a mounting flange, and the reinforcement mechanism includes a connecting flange and fixing bolts, wherein: The fixed flange and the mounting flange are fixedly arranged at both ends of the L-shaped pipe respectively; The connecting flanges are respectively fixedly arranged at both ends of the intermediate pipe and connected to the fixing flanges through fixing bolts, and the connecting flanges are made of PVC material.

4. A magnetic flap level gauge for corrosive media according to claim 3, characterized in that: The flap box is made of a metal material with a harderness than that of the connecting pipe, and is in contact with the peripheral side of the intermediate pipe.

5. A magnetic flap level gauge for corrosive media according to any one of claims 1 to 4, characterized in that: The reinforcement mechanism also includes two top plates, which are respectively fixed at both ends of the flip box and respectively abut against the two connecting flanges, and the top plates are connected to the fixing flanges by fixing bolts.

6. A magnetic flap level gauge for corrosive media according to any one of claims 1 to 4, characterized in that: The magnetic float consists of two floats and a ball, The two buoys are rotatably connected; The balls are arranged on the circumference of the buoy and are connected to the inner wall of the intermediate tube in a rolling manner. Each buoy is provided with a plurality of balls, and the plurality of balls on the same buoy are arranged in a circular array around the axis of the buoy.

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