Measuring tube with electrode, flow meter, concentration meter and imaging system

Abstract

The utility model discloses a measuring tube containing electrode, flowmeter, concentration meter and imaging system, the measuring tube containing electrode comprises a tube body and a lining connected to the inner wall of the tube body, the tube body and the lining are provided with electrode holes for the electrode to pass through, the electrode comprises an electrode tip which is matched with the inner wall of the lining in a crimping way, and the electrode tip is provided with a through hole. The electrode tip is connected with a threaded structure body used for being in threaded connection with a locking part through a conical electrode body matched with the electrode hole. According to the technical scheme, the lining covers the inner wall of the tube body and can enter the electrode hole of the tube body, the electrode body of the electrode is inserted into the electrode hole, the lining can be extruded between the inner wall of the electrode hole of the tube body and the outer wall of the electrode body, and then a reliable second-stage sealing structure is formed; the first-stage sealing structure and the second-stage sealing structure formed between the electrode tip and the inner wall of the lining act together, so that the sealing performance of the measuring tube at the electrode can be effectively improved, and the service life of the measuring tube containing the electrode is further prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of fluid measurement devices, and in particular to measuring tubes containing electrodes, flow meters, concentration meters and imaging systems. Background Technology

[0002] In the field of tunnel boring machine technology, especially shield machines equipped with slurry pipelines, it is necessary to use concentration meters to measure the concentration of slurry inlet and outlet pipelines, flow meters to measure the flow rate of slurry inlet and outlet pipelines, and sometimes resistance scanning imaging systems to display the status of slurry and slag in the pipeline in real time. These products, such as flow meters, concentration meters, and resistance scanning imaging systems, generally require measuring tubes containing electrodes to achieve their measurement objectives. However, several problems exist in practical engineering applications. On the one hand, the slurry medium is often harsh, causing rapid wear of the lining and electrodes on the measuring tube, resulting in poor measurement data and imaging effects. In severe cases, lining wear and leakage or detachment may occur. Because the electrodes on the measuring tube need to pass through the lining and the metal tube outside the lining, once the electrodes wear out, slurry leakage is most likely to occur between the electrodes and the lining and metal tube, and repairs are often difficult. On the other hand, the slurry medium inside the pipeline has certain special properties, which can cause the electrodes to become coated, easily forming a mud film on the electrode surface, affecting measurement data and imaging effects.

[0003] A search revealed that a patent with a publication date of March 9, 2016, and publication number CN105393093A, discloses a flow meter with a first layer protecting the metal support material from damage by the corrosive measured medium. A second layer is arranged in the measuring tube on the side of the first layer facing the medium to reduce wear load. An electrode passes through the first layer, the second layer, and the measuring tube and is fixed to the metal structure. A utility model patent with an authorization announcement date of August 19, 2022, and authorization announcement number CN217236887U, disclosed an electrode for an electromagnetic flow meter and the electromagnetic flow meter itself. The measuring end of the electrode body has a contact portion for the measured medium, which includes several protruding conductive parts that penetrate into the clearance of the measuring tube, increasing the contact area and providing a cleaning function. The electrode passes through the liner and the measuring tube and is fixed to the measuring tube.

[0004] Although the technical solutions disclosed in the above patent documents improve the wear resistance of the liner or electrode, they still have the following shortcomings: (1) The electrode structure design is unreasonable, the connection between the electrode and the liner and the metal tube is not tight, and after the electrode or the liner near the electrode wears, the high pressure slurry may leak from the contact surface between the electrode and the liner; (2) The liner structure size is unreasonable and the wear resistance is poor; (3) The connection method between the liner and the metal tube is not reflected, which leads to a greater risk of the liner falling off the metal tube.

[0005] It should be noted that the above technical information is intended only to enhance the understanding of the overall background technology of this utility model, and should not be regarded as an admission or in any form implying that the above technical information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings in the above-mentioned background technology, this utility model proposes a measuring tube containing electrodes, a flow meter, a concentration meter and an imaging system. The technical problem to be solved is: how to improve the service life of the measuring tube containing electrodes.

[0007] The technical solution of this utility model is as follows:

[0008] A measuring tube containing electrodes includes a tube body and an inner liner connected to the inner wall of the tube body. Electrode holes are provided on the tube body and the inner liner for the electrodes to pass through. The electrodes include an electrode head that presses against the inner wall of the inner liner. The electrode head is connected to a threaded structure for a threaded connection locking part via a tapered electrode body. In this technical solution, the inner liner not only covers the inner wall of the tube body but also enters the electrode hole. When the electrode body is inserted into the electrode hole, the inner liner is pressed between the inner wall of the electrode hole and the outer wall of the electrode body, thus forming a reliable second-level sealing structure. The first-level sealing structure formed between the electrode head and the inner wall of the inner liner, together with the second-level sealing structure, effectively improves the sealing performance of the measuring tube at the electrode, thereby increasing the service life of the measuring tube containing electrodes.

[0009] Based on the above technical solutions, as a preferred technical solution for a measuring tube containing electrodes, the side of the electrode head that is pressed against the inner liner is provided with at least one sealing protrusion surrounding the electrode body. The cross-section of the sealing protrusion is a regular or irregular shape. When the threaded structure moves outward towards the tube body, causing the electrode head to press against the inner liner and the electrode body to press against the inner liner of the electrode hole, the sealing protrusion on the electrode head first presses against the inner wall surface of the inner liner until the outer surface of the electrode head is in complete contact with the inner liner. A zigzag sealing contact surface is then formed between the electrode head and the inner wall surface of the inner liner. This also improves the fixing effect of the electrode head on the inner liner, further enhancing the sealing performance of the primary sealing structure. Furthermore, the improved fixing effect on the inner liner prevents contact between the inner liner of the electrode hole and the measured fluid, thus preventing wear of the secondary sealing structure due to contact with the measured fluid, and further improving the sealing performance of the secondary sealing structure. The regular shape includes, but is not limited to, trapezoidal, rectangular, arc-shaped, and triangular shapes, while the irregular shape includes, but is not limited to, multi-fold concave shapes and multi-fold convex shapes.

[0010] Based on the above technical solutions, as a preferred technical solution for a measuring tube containing electrodes, the outer periphery of the inner liner is provided with an electrode hole liner that is adapted to the inner wall of the electrode hole of the tube body. The electrode hole liner is directly equipped inside the electrode hole of the tube body, without relying on the electrode body for compression. When the electrode body is compressed, the electrode hole liner inside the electrode hole can be directly pressed, further improving the reliability of the assembly and sealing of the secondary sealing structure.

[0011] Based on the above technical solutions, a preferred technical solution for a measuring tube containing electrodes is described, in which the inner liner is a wear-resistant rubber tube and the tube body is a metal tube, with the inner liner connected to the tube body via a vulcanization bonding process. This technical solution uses a metal tube as the main structure of the measuring tube, ensuring structural strength, while using a wear-resistant rubber tube as the inner liner improves the ease of connection between the liner and the tube body and enhances wear resistance compared to polyurethane tubes. This technical solution employs a vulcanization bonding process to achieve the connection structure between the liner and the tube body, which, compared to traditional adhesive structures, improves the strength of the connection structure and prevents negative pressure inside the measuring tube from tearing the liner.

[0012] Based on the above technical solutions, as a preferred technical solution for a measuring tube containing electrodes, the electrode hole liner is connected to the electrode hole of the tube body through a vulcanization bonding process, so that the connection structure generated by the vulcanization bonding process of the electrode hole liner is integrated with the electrode hole on the tube body, thereby forming an integral structure between the inner wall of the electrode hole and the liner, which works synergistically with the compression sealing effect formed by the electrode body, further improving the sealing performance of the primary sealing structure.

[0013] Based on the above technical solutions, as a preferred technical solution for a measuring tube containing electrodes, the threaded structure is an externally threaded post, and the locking part is a nut or bolt; the threaded structure is an internally threaded cylinder, and the locking part is a stud or bolt. The stud is connected to a stop edge that engages with the outer wall of the tube, and the nut of the bolt engages with the outer wall of the tube. This technical solution provides two types of structural forms for fixing electrodes. One type is where a nut or bolt with internal threads is adapted to an externally threaded post, and the nut or bolt engages with the outer wall of the tube. When the nut or bolt is tightened, the externally threaded post moves outward from the tube, thereby causing the electrode head to press against the inner liner, while the electrode body presses against the inner liner of the electrode hole. The other type is where a stud with external threads is adapted to an internally threaded cylinder, and the stop edge on the stud engages with the outer wall of the tube. When the stud is tightened, the internally threaded cylinder moves outward from the tube, thereby causing the electrode head to press against the inner liner, while the electrode body presses against the inner liner of the electrode hole.

[0014] Based on the above technical solutions, a preferred technical solution for a measuring tube containing electrodes includes an annular protective cover on the outer periphery of the tube body to protect the electrodes. The annular protective cover comprises at least two detachably connected arc-shaped plates, and has a cable hole and a detection hole, with the detection hole located at the bottom of the annular protective cover. This technical solution provides an annular protective cover that not only protects the electrodes, preventing damage to the portion of the structure outside the tube body, but also allows cables connected to the electrodes to pass through through the cable hole, and the detection hole at the bottom of the annular protective cover enables immediate detection of any leakage of the measured fluid.

[0015] Based on the above technical solutions, as a preferred technical solution for a measuring tube containing electrodes, the liner includes an inner liner flange and an inner liner body located between two inner liner flanges. The thickness of the inner liner flange is 5mm-20mm, and the thickness of the inner liner body is 10-30mm. In traditional flow meters, concentration meters, resistance scanning imaging systems, etc., the inner liner thickness is 5mm and the flange thickness is 3mm, which is not wear-resistant under severe wear conditions. However, the inner liner 1 structure in this technical solution is more wear-resistant. The preferred embodiment is an inner liner body thickness of 30mm and an inner liner flange thickness of 15mm, which makes the structure more wear-resistant.

[0016] Based on the above technical solutions, as a preferred technical solution for a measuring tube containing electrodes, a plurality of electrodes are arranged along the circumferential direction of the same cross-section of the tube body, and there are a plurality of cross-sections. In this technical solution, "a plurality of" refers to at least one, that is, there can be one, two or more electrodes 3 at the same cross-section, that is, the cross-section where the electrodes 3 are set can be one, two or more, thereby forming a dual-section or multi-section measurement function.

[0017] A flow meter comprising a measuring tube containing electrodes as described in any of the above technical solutions.

[0018] A concentration meter comprising a measuring tube containing electrodes as described in any of the above technical solutions.

[0019] An imaging system comprising a measuring tube containing electrodes as described in any of the above technical solutions, wherein the imaging system is a resistance scanning imaging system or other types of imaging systems.

[0020] The electrode-containing measuring tube, flow meter, concentration meter, and resistance scanning imaging system proposed in this utility model have a longer service life and lower risk of slurry leakage compared with existing technologies, which is of great significance for improving the life and reliability of the flow meter, concentration meter, and resistance scanning imaging system. The direct technical effects of the technical solution provided by this utility model include, but are not limited to, the following: ① The electrode uses an electrode body to prevent slurry leakage from the contact surface between the electrode body and the lining; ② The electrode head connected to the electrode body is provided with at least one sealing protrusion that presses against the lining to prevent slurry leakage from the contact surface between the electrode measuring end and the lining; ③ The inner wall of the tube is bonded with thickened wear-resistant rubber through a vulcanization bonding process, making the measuring tube more wear-resistant; ④ It improves the data acquisition accuracy of the concentration meter and flow meter, and improves the imaging quality and the accuracy and stability of the displayed data of the resistance scanning imaging system. Its indirect technical effects include: reducing the risk of component failure in the circulation system, which is of great significance for guiding construction and ensuring construction efficiency. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of Embodiment 1, which includes a measuring tube with electrodes.

[0023] Figure 2 For the measuring tube containing electrodes Figure 1 A cross-sectional view of the AA plane;

[0024] Figure 3 For the measuring tube containing electrodes Figure 1 A cross-sectional view of the BB plane;

[0025] Figure 4 for Figure 1 and Figure 2 Magnified view of the middle electrode;

[0026] Figure 5 This is a cross-sectional view of Embodiment 2, which includes a measuring tube with electrodes.

[0027] Explanation of icon numbers:

[0028] 1. Liner; 2. Inlet flange; 3. Pipe body; 4. Bolt; 5. Washer; 6. First ring plate; 7. Second ring plate; 8. Outlet flange; 9. Electrode; 10. Nut; 11. Electrode washer; 12. First protective cover; 13. Second protective cover; 14. Third protective cover; 15. Cable hole; 16. Detection hole; 17. Electrode hole.

[0029] Inner lining flange 1-1, inner lining body 1-2;

[0030] Electrode head 9-1, first trapezoidal tooth 9-2, second trapezoidal tooth 9-3, electrode body 9-4, threaded structure. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0033] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0035] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0036] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0038] To address the shortcomings of the aforementioned background technologies, this invention proposes a measuring tube for use in imaging, concentration measurement, and flow measurement fields, which solves the problems of short service life and easy slurry leakage at the electrodes. Key Invention Point 1: The electrode body adopts a conical design to prevent slurry leakage from the contact surface between the electrode body and the liner. Key Invention Point 2: The back of the electrode measuring end adopts a serrated design to prevent slurry leakage from the contact surface between the back of the electrode measuring end and the liner. Key Invention Point 3: The liner and the tube body are bonded using a vulcanization process to prevent tearing under negative pressure.

[0039] Specific embodiments are shown below:

[0040] A measuring tube containing electrodes, such as Figures 1 to 3 As shown, the device includes a tube body 3 and an inner liner 1 connected to the inner wall of the tube body 3. The tube body 3 and the inner liner 1 are provided with electrode holes 17 for electrodes 9 to pass through. The electrode 9 includes an electrode head 9-1 that is press-fitted to the inner wall of the inner liner 1. The electrode head 9-1 is connected to a threaded structure for a threaded connection locking part through an electrode body 9-4 adapted to the electrode hole. By dragging the threaded structure with the locking part 10, the electrode head 9-1 can be pressed against the inner liner 1, and the electrode body 9-4 can be pressed against the portion of the inner liner 1 that enters the electrode hole 17 on the tube body 3.

[0041] In this embodiment, the liner 1 not only covers the inner wall of the tube body 3, but also enters the electrode hole 17 of the tube body 3. When the electrode body 9-4 of the electrode is inserted into the electrode hole 17, the liner 1 can be squeezed between the inner wall of the electrode hole 17 of the tube body 3 and the outer wall of the electrode body 9-4, thereby forming a reliable second-level sealing structure. The first-level sealing structure formed between the electrode head 9-1 and the inner wall of the liner 1 works together with the second-level sealing structure to effectively improve the sealing performance of the measuring tube at the electrode 9, thereby increasing the service life of the measuring tube containing the electrode.

[0042] Based on the above embodiments, as a preferred embodiment of the measuring tube containing electrodes, the outer periphery of the inner liner 1 is provided with an electrode hole liner that is adapted to the inner wall of the electrode hole 17 of the tube body 3. The electrode hole liner is directly equipped in the electrode hole 17 of the tube body 3 without relying on the electrode body 9-4 for compression. When the electrode body 9-4 is compressed, the electrode hole liner in the electrode hole 17 can be directly pressed, further improving the reliability of the assembly of the secondary sealing structure and the reliability of the seal.

[0043] Based on the above embodiments, in a preferred embodiment of the measuring tube containing electrodes, the inner liner 1 is a wear-resistant rubber tube, and the tube body 3 is a metal tube. The inner liner 1 is connected to the tube body 3 via a vulcanization bonding process. This embodiment uses a metal tube as the main structure of the measuring tube, ensuring structural strength. Using a wear-resistant rubber tube as the inner liner 1 improves the ease of connection between the inner liner 1 and the tube body 3, and also enhances wear resistance compared to polyurethane tubes. This embodiment uses a vulcanization bonding process to achieve the connection structure between the inner liner 1 and the tube body 3. Compared to traditional adhesive structures, this improves the strength of the connection structure and prevents negative pressure inside the measuring tube from tearing the inner liner 1.

[0044] Based on the above embodiments, as a preferred embodiment of the measuring tube containing electrodes, the electrode hole liner is connected to the electrode hole 17 of the tube body 3 through a vulcanization bonding process, so that the connection structure generated by the electrode hole liner through the vulcanization bonding process is integrated with the electrode hole 17 on the tube body 3, thereby making the inner wall of the electrode hole 17 and the liner 1 form an integrated structure, which works synergistically with the compression sealing effect formed by the electrode body 9-4, further improving the sealing performance of the primary sealing structure.

[0045] Based on the above embodiments, as a preferred embodiment of the measuring tube containing electrodes, the threaded structure is an external threaded post, and the locking part is a nut 10 or a bolt; the threaded structure is an internal threaded cylinder, and the locking part is a stud or a bolt, the stud is connected to a stop edge that stops and cooperates with the outer wall of the tube body 3, and the nut of the bolt stops and cooperates with the outer wall of the tube body 3.

[0046] This embodiment provides two types of structures for fixing the electrode 9. One type is a nut or screw with internal threads that is adapted to an externally threaded post. The nut or screw is in a stop-fitting engagement with the outer wall of the tube body 3. When the nut or screw is tightened, the externally threaded post will move outward in the direction of the tube body 3, thereby causing the electrode head 9-1 to press against the inner liner 1, while the electrode body 9-4 presses against the inner liner of the electrode hole. The other type is a stud with external threads that is adapted to an internally threaded cylinder. The stop edge on the stud is in a stop-fitting engagement with the outer wall of the tube body 3. When the stud is tightened, the internally threaded cylinder will move outward in the direction of the tube body 3, thereby causing the electrode head 9-1 to press against the inner liner 1, while the electrode body 9-4 presses against the inner liner of the electrode hole.

[0047] Based on the above embodiments, as a preferred embodiment of the measuring tube containing electrodes, such as... Figure 4 As shown, the side of the electrode head 9-1 that is pressed into the inner liner 1 is provided with at least one sealing protrusion surrounding the electrode body 9-4, and the cross-section of the sealing protrusion is a regular or irregular shape.

[0048] When the threaded structure moves outward from the tube body 3, causing the electrode head 9-1 to press against the inner liner 1 and the electrode body 9-4 to press against the inner liner of the electrode hole, the sealing protrusion on the electrode head 9-1 first presses against the inner wall surface of the inner liner 1 until the outer side of the electrode head 9-1 is in complete contact with the inner liner 1. Then, a zigzag sealing contact surface will be formed between the electrode head 9-1 and the inner wall surface of the inner liner 1. At the same time, it can also improve the fixing effect of the electrode head 1 on the inner liner 1, further improving the sealing performance of the primary sealing structure. In addition, due to the improved fixing effect on the inner liner 1, it can also prevent the inner liner of the electrode hole from contacting the fluid being measured, that is, prevent the secondary sealing structure from contacting the fluid being measured and causing wear, thereby also improving the sealing performance of the secondary sealing structure.

[0049] The regular shapes include, but are not limited to, trapezoids, rectangles, arcs, triangles, etc., and the irregular shapes include, but are not limited to, concave shapes with multiple folds and convex shapes with multiple folds.

[0050] Based on the above embodiments, in a preferred embodiment of the measuring tube containing electrodes, an annular protective cover for protecting the electrodes 9 is provided on the outer periphery of the tube body 3. The annular protective cover has a cable hole 15 and a detection hole 16, with the detection hole 16 located at the bottom of the annular protective cover. The annular protective cover provided in this embodiment not only protects the electrodes 9, preventing damage to the portion of the electrode 9 located outside the tube body 3, but also allows the cable hole 15 to facilitate the passage of cables connected to the electrodes 9, and the detection hole 16, located at the bottom of the annular protective cover, enables immediate detection of any leakage of the measured fluid.

[0051] Based on the above embodiments, in a preferred embodiment of the measuring tube containing electrodes, the inner liner 1 includes an inner liner flange 1-1 and an inner liner body 1-2 located between the two inner liner flanges 1-1. The thickness of the inner liner flange 1-1 is 5mm-20mm, and the thickness of the inner liner body 1-2 is 10-30mm. In traditional flow meters, concentration meters, resistance scanning imaging systems, etc., the inner liner thickness is 5mm and the flange thickness is 3mm, which is not wear-resistant under severe wear conditions. However, the inner liner 1 structure in this embodiment is more wear-resistant. Preferably, the inner liner body 1-2 is 30mm thick and the inner liner flange 1-1 is 15mm thick, that is, the thickness of the inner liner body 1-2 is twice the thickness of the inner liner flange 1-1, making the structure more wear-resistant.

[0052] Based on the above embodiments, as a preferred embodiment of the measuring tube containing electrodes, such as... Figure 5 As shown, a plurality of electrodes 3 are arranged along the circumferential direction of the same cross-section of the tube body 3, and there are a plurality of cross-sections. In this embodiment, "a plurality of" refers to at least one, that is, there can be one, two or more electrodes 3 at the same cross-section, that is, the cross-section where the electrodes 3 are set can be one, two or more, thereby forming a dual-section or multi-section measurement function.

[0053] As a preferred embodiment of a measuring tube containing electrodes, such as Figures 1 to 5 As shown, the main structure includes liner 1, inlet flange 2, pipe body 3, bolt 4, gasket 5, first ring plate 6, second ring plate 7, outlet flange 8, electrode 9, nut 10, electrode gasket 11, first protective cover 12, second protective cover 13, third protective cover 14, cable hole 15, detection hole 16, and electrode hole 17.

[0054] The inner liner 1 mainly consists of an inner liner flange 1-1 and an inner liner body 1-2. The inner liner flange 1-1 is located outside the sealing surfaces of the inlet flange 2 and the outlet flange 8, and is flush with the sealing surface bosses of the inlet flange 2 and the outlet flange 8. The inner liner body 1-2 is located inside the pipe body 3, with its outer side in contact with the pipe body 3 and its inner side in contact with the medium being measured.

[0055] The pipe body 3 passes through the inlet flange 2 and the outlet flange 8, and the two end faces of the pipe body 3 are flush with the end faces of the inlet flange 2 and the outlet flange 8.

[0056] The electrode 9 is mainly composed of an electrode head 9-1, a first trapezoidal tooth 9-2, a second trapezoidal tooth 9-3, and an electrode body 9-4. The electrode head 9-1 is connected to the electrode body 9-4. The position where the electrode body 9-4 contacts the electrode head 9-1 is tapered, wider at the bottom and narrower at the top. The upper end of the electrode body 9-4 is cylindrical.

[0057] Electrode holes 17 are respectively provided on the liner 1 and the tube body 3. A layer of liner material is wrapped around the electrode holes 17 on the tube body 3. The electrode 9, wrapped by the liner material, passes through the liner body 1-2 and the tube body 3 sequentially through the electrode holes 17. The electrode holes 17 on the liner body 1-2 are cylindrical. After the electrode 9 passes through the electrode holes 17, electrode washers 11 and nuts 10 are sequentially nested on the electrode 9. By tightening the nuts 10, the electrode washers 11 are gradually compressed. After compression, the first trapezoidal teeth 9-2 and the second trapezoidal teeth 9-3 on the electrode 9 are embedded in the liquid-contact side of the liner body 1-2, forming two seals. During the pre-tightening process, the conical structure on the electrode body 9-4 gradually compresses the liner material inside the electrode holes 17, forming a third seal.

[0058] The tube 3 has 1 to N electrodes 9 arranged on the same cross section, which are evenly distributed. The fixing method of each electrode 9 is as shown above. The electrodes 9 can be symmetrically distributed or asymmetrically distributed about the center.

[0059] Preferably, the tube body 3 has eight electrodes 9 evenly distributed on the same cross-section, and each electrode 9 is fixed as shown above. The eight electrodes 9 are divided into four pairs, and each pair is symmetrical about the center. In addition, the number of electrodes 9 on the same cross-section of the tube body 3 can be four, eight, sixteen, or thirty-two.

[0060] The protective cover is mainly assembled from a first protective cover 12, a second protective cover 13, and a third protective cover 14. Cable holes 15 and detection holes 16 are provided on the protective cover, with the detection hole 16 located at the bottom of the measuring tube and the cable hole 15 located at the top or upper part of the protective cover. The protective cover has a C-shaped cross-section with an arc plate in the middle. Multiple protective covers form a 360° enclosed space. Side plates are located on both sides, with fixing holes on the side plates. The side plates of the protective cover contact the first ring plate 6 and the second ring plate 7, which are located inside the protective cover. The first ring plate 6 and the second ring plate 7 have threaded holes at the top and are connected to the tube body 3 at the bottom. Bolts 4 pass through the fixing holes on the side plates and the threaded holes on the ring plates to ensure a tight connection between the protective cover and the ring plates. The protective cover encloses components such as electrodes 9, electrode washers 11, and nuts 10.

[0061] The specific working principle is as follows:

[0062] Slurry flows into the measuring pipe from the inlet flange. During its flow through the channel, the slurry wears down the lining and electrodes. To enhance the wear resistance of the lining, this invention selects wear-resistant lining materials and optimizes the molding process of the lining and electrodes. It also optimizes the lining structure by increasing the flange thickness and the overall lining thickness. During use, the electrodes inevitably experience wear. To prevent slurry leakage, this invention increases the thickness of the electrode ends to enhance wear resistance. Furthermore, the back of the electrode measuring end features a serrated design, and the electrode body has a conical design. Under pre-tightening force, this reduces the risk of slurry leakage from the contact surfaces between the electrode measuring end and the lining, and between the electrode body and the lining.

[0063] Therefore, the concentration meter measuring tube according to the present invention has the following direct technical effects: ① The electrode body adopts a conical design to prevent slurry leakage from the contact surface between the electrode body and the inner lining; ② The back of the electrode measuring end adopts a serrated design to prevent slurry leakage from the contact surface between the back of the electrode measuring end and the inner lining; ③ Thickened wear-resistant rubber is pasted on the inner wall of the measuring tube, making the measuring tube more wear-resistant; ④ It improves the data acquisition accuracy of the concentration meter and flow meter, and improves the imaging quality and the accuracy and stability of the displayed data. The measuring tube lining has a long service life and a low risk of slurry leakage, which is of great significance to improving the service life and reliability of the measuring tube.

[0064] Its indirect technical effect is to reduce the risk of component failure in the circulating system, which is of great significance for guiding construction and ensuring construction efficiency.

[0065] A flow meter comprising a measuring tube containing electrodes as described in any of the above embodiments.

[0066] A concentration meter comprising a measuring tube containing electrodes as described in any of the above embodiments.

[0067] An imaging system comprising a measuring tube containing electrodes as described in any of the above embodiments, wherein the imaging system is a resistance scanning imaging system or other types of imaging system.

[0068] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0069] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A measuring tube containing electrodes, comprising a tube body (3) and an inner liner (1) connected to the inner wall of the tube body (3), wherein the tube body (3) and the inner liner (1) are provided with electrode holes (17) for electrodes (9) to pass through, characterized in that: The electrode (9) includes an electrode head (9-1) that is press-fitted to the inner wall of the liner (1). The electrode head (9-1) is connected to a threaded structure for threaded connection locking parts via a tapered electrode body (9-4).

2. The measuring tube containing electrodes according to claim 1, characterized in that: The electrode head (9-1) is provided with at least one sealing protrusion around the electrode body (9-4) on the side where it is pressed into contact with the inner liner (1). The cross-section of the sealing protrusion is a regular or irregular shape. The regular shape is a trapezoid, rectangle, arc or triangle. The irregular shape is a concave shape with multiple folds or a convex shape with multiple folds.

3. The measuring tube containing electrodes according to claim 1 or 2, characterized in that: The outer periphery of the liner (1) is provided with an electrode hole liner that is adapted to the inner wall of the electrode hole (17) of the tube body (3).

4. The measuring tube containing electrodes according to claim 3, characterized in that: The inner liner (1) is a wear-resistant rubber tube, the tube body (3) is a metal tube, the inner liner (1) is connected to the tube body (3) by a vulcanization bonding process, and the electrode hole liner is connected to the electrode hole (17) of the tube body (3) by a vulcanization bonding process.

5. The measuring tube containing electrodes according to any one of claims 1, 2, and 4, characterized in that: The threaded structure is an external threaded column, and the locking part is a nut (10) or a screw cap; the threaded structure is an internal threaded cylinder, and the locking part is a stud or bolt, with the stud connected to a stop edge that cooperates with the outer wall of the tube (3).

6. The measuring tube containing electrodes according to claim 5, characterized in that: The outer periphery of the tube (3) is provided with an annular protective cover for protecting the electrode (9). The annular protective cover includes at least two detachably connected arc plates. The annular protective cover is provided with a cable hole (15) and a detection hole (16). The detection hole (16) is located at the bottom of the annular protective cover.

7. The electrode-containing measuring tube according to any one of claims 1, 2, 4, 6, characterized in that: Several electrodes (3) are arranged along the circumferential direction of the same cross section of the tube (3), and there are several cross sections.

8. A flow meter characterized by: Including the measuring tube containing electrodes as described in any one of claims 1-7.

9. A densitometer characterized by: Including the measuring tube containing electrodes as described in any one of claims 1-7.

10. An imaging system, characterized in that: Including the measuring tube containing electrodes as described in any one of claims 1-7.

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