Anti-fouling electromagnetic water meter and electromagnetic flowmeter

Abstract

The application belongs to the technical field of measuring instruments, and specifically discloses an electromagnetic flowmeter, which comprises a flowmeter module, wherein the flowmeter module comprises an electrode body, and the top of the electrode body is fixedly connected with an electrode connecting rod; and a scale formation prevention type electromagnetic water meter, which comprises the following components: a flow guide pipe, two connecting flanges, a meter body and a mounting module; wherein the two connecting flanges are fixedly connected to the two ends of the flow guide pipe respectively; the scale removal ring is made of a memory alloy material; when water flows through the electromagnetic flow sensor, the scale removal vibration wave memory alloy can actively transmit the scale removal vibration wave to the water, so that the solubility of the substances soluble in the water is increased, the measuring electrode can be ensured to be not scaled for a long time, and the flow measurement precision can be ensured to be stable for a long time; meanwhile, the fluid self-power is used to drive the rotation of the impeller, and the silicone cleaning block is driven to continuously scrape the surface of the electrode, so that the accumulated scale, dirt and biological membrane can be effectively removed, and the formation of the covering layer on the surface of the electrode is prevented.

Description

Technical Field

[0001] This invention belongs to the field of metering instrument technology, and specifically discloses an anti-scaling electromagnetic water meter and an electromagnetic flow meter. Background Technology

[0002] Electromagnetic flow meters are widely used instruments for measuring liquid flow, especially in water treatment, industrial circulating water systems, and metering management. Based on Faraday's principle of electromagnetic induction, they calculate flow velocity and flow rate by measuring the induced electromotive force generated when a conductive fluid moves in a magnetic field.

[0003] In practical applications, the electrodes of electromagnetic flowmeters are in contact with fluid for extended periods, especially in hard water or mineral-rich media. Scale, dirt, or electrolytic products easily accumulate on the electrode surfaces. These deposits cover the electrode surfaces, leading to signal attenuation, decreased measurement sensitivity, zero drift, and inaccurate readings; in severe cases, they can even cause complete instrument failure.

[0004] Therefore, those skilled in the art have proposed an anti-scaling electromagnetic water meter and an electromagnetic flow meter to solve the problems mentioned above. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide an anti-scaling electromagnetic water meter and electromagnetic flow meter to solve the problem of scale formation affecting the use of existing technologies.

[0006] To achieve the above objectives, the present invention provides an electromagnetic flowmeter, including a flowmeter module.

[0007] The flow meter module includes an electrode body, an electrode connecting rod fixedly connected to the top of the electrode body, an external thread on the upper end of the electrode connecting rod, an installation ring fixedly fixed to the outer side of the electrode body, a rotating ring at the bottom of the installation ring, a rotating plate fixedly connected to the surface of the rotating ring, a cleaning block fixedly connected to the inner side of the rotating plate, the cleaning block being a silicone material component and in contact with the surface of the electrode body, and a first sealing ring sleeved on the surface of the electrode connecting rod.

[0008] In the above technical solution, preferably, the surface of the rotating ring is fixedly connected with uniformly distributed drive blades, and the surface of the rotating plate is fixedly connected with a slip ring that is slidably connected to the inner wall of the mounting ring.

[0009] The top of the slip ring is provided with ring-distributed jacks, the inside of the mounting ring is provided with a connecting cavity, the inner top wall of the connecting cavity is fixedly connected with an electromagnet, the inner wall of the connecting cavity is slidably connected with an adsorption block, the bottom of the adsorption block is fixedly connected with a plug rod, the lower end of the plug rod penetrates out of the mounting ring and extends to the inside of the adjacent jack, a second spring is fixedly connected between the bottom of the adsorption block and the inner wall of the connecting cavity, and the adsorption block is an iron metal material component.

[0010] A scale-preventing electromagnetic water meter comprises the following components:

[0011] A flow guide pipe, two connecting flanges, a meter body and a mounting module;

[0012] The two connecting flanges are fixedly connected to the two ends of the flow guide pipe, the meter body is arranged on the surface of the flow guide pipe, and the mounting module is arranged on the surface of the flow guide pipe and used for mounting a flowmeter module.

[0013] The mounting module comprises a fixing cavity arranged on the surface of the flow guide pipe and connected to the inside of the flow guide pipe, a first isolation column detachably arranged on the inner wall of the fixing cavity, a second sealing ring arranged between one end of the first isolation column and the inner wall of the fixing cavity, a descaling ring arranged on the other end of the first isolation column, and a second isolation column arranged on the other end of the descaling ring.

[0014] In the above technical solution, preferably, the electrode connecting rod penetrates from the inside of the flow guide pipe to the inside of the fixing cavity, the first sealing ring is located between the electrode body and the inner wall of the flow guide pipe, the electrode connecting rod penetrates the first isolation column, the descaling ring and the second isolation column in sequence, and the descaling ring is in contact with the surface of the electrode connecting rod.

[0015] In the above technical solution, preferably, the surface of the second isolation column is provided with a butterfly-shaped gasket sleeved on the surface of the electrode connecting rod, the end of the butterfly-shaped gasket away from the second isolation column is provided with a metal gasket in contact with the surface of the electrode connecting rod, the surface of the metal gasket is fixedly connected with a wiring terminal, the other end of the metal gasket is provided with an isolation gasket, and the other end of the isolation gasket is threadedly connected with a fastening bolt on the surface of the electrode connecting rod.

[0016] In the above technical solution, preferably, the inner wall of the fixing cavity is provided with a clamping groove, and the surface of the flow guide pipe is provided with a sliding groove in communication with the fixing cavity.

[0017] In the above technical scheme, preferably, the surface of the flow guide pipe is provided with the blocking blocks which are uniformly distributed and matched with the fixed cavities, the lower end of the blocking block extends to the inside of the fixed cavity, and the upper end diameter of the blocking block is greater than the lower end diameter, the cross section of the blocking block is provided in a T shape, the surface of the blocking block is provided with the resistance increasing ring in contact with the surface of the flow guide pipe, the lower end of the blocking block is embedded with the clamping sleeve corresponding to the electrode connecting rod, the blocking block is a rubber material component, and the inner diameter of the clamping sleeve is smaller than the diameter of the electrode connecting rod.

[0018] In the above technical scheme, preferably, the surface of the blocking block is provided with the mounting cavities which are uniformly distributed, the inner wall of the mounting cavity is fixedly connected with the two symmetrically distributed stop blocks, the inner wall of the mounting cavity is slidingly connected with the connecting plate, the first spring is fixedly connected between one side of the connecting plate and the inner wall of the mounting cavity, the other side of the connecting plate is fixedly connected with the clamping block, the other end of the clamping block penetrates into the inside of the clamping groove, and the one side of the clamping block is provided with the inclined surface.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1. The descaling ring adopts a memory alloy material. When water flows through the electromagnetic flow sensor, the descaling vibration memory alloy actively transmits the descaling vibration to the water, increases the solubility of the water-soluble substances, and can ensure that the measuring electrode is not scaled for a long time, thereby ensuring the long-term stability of the flow measurement accuracy. At the same time, the fluid itself is used to drive the impeller to rotate, and the silicone cleaning block is used to continuously scrape the surface of the electrode, which can effectively remove accumulated scale, dirt and biofilm, and prevent the formation of a cover layer on the surface of the electrode.

[0021] 2. The double-mechanism scale prevention structure effectively prolongs the electrode maintenance cycle, reduces the frequency of manual cleaning and calibration, and ensures that the electromagnetic flowmeter still maintains high measurement accuracy and stability under harsh working conditions. This design helps to maintain the uniformity of the fluid state inside the flow passage and around the electrode, further improving the long-term operation reliability and service life of the overall instrument, and is especially suitable for water treatment, industrial circulating water and other easy scaling scenarios.

[0022] 3. The flowmeter adopts a unique clamping and elastic sealing design. By rotating the blocking block, the inclined clamping block and the first spring can be used to quickly engage and lock or release the threaded groove of the electrode connecting rod, greatly simplifying the installation and disassembly process, making the maintenance work efficient and simple, and integrating multiple sealing units such as the first sealing ring, the second sealing ring and the metal gasket inside the structure to form reliable sealing from the inner wall of the flow guide pipe to the fixed cavity, effectively eliminating the risk of leakage under high pressure and pulse flow state. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The figure is a structural schematic diagram of the present application.

[0024] Figure 2 is a sectional view of the application;

[0025] Figure 3 is a structural view of the flow meter module of the application;

[0026] Figure 4 is a connection view of the mounting ring, rotating ring, rotating plate and driving blade of the application;

[0027] Figure 5 is Figure 4 an enlarged view of D

[0028] Figure 6 is a connection view of the electrode connecting rod and mounting module of the application;

[0029] Figure 7 is Figure 6 an enlarged view of A

[0030] Figure 8 is Figure 6 an enlarged view of B

[0031] Figure 9 is a sectional view of the flow guide pipe of the application;

[0032] Figure 10 is Figure 9 an enlarged view of C

[0033] In the figure: 1, flow guide pipe; 101, connecting flange; 2, meter body; 3, mounting module; 301, first isolation column; 302, second sealing ring; 303, descaling ring; 304, second isolation column; 305, butterfly gasket; 306, plugging block; 307, resistance increasing ring; 308, clamping block; 309, stop block; 310, mounting cavity; 311, metal gasket; 312, first spring; 313, connecting plate; 314, fastening bolt; 315, isolation gasket; 316, wiring terminal; 317, fixing cavity; 318, clamping groove; 319, sliding groove; 4, flow meter module; 401, electrode connecting rod; 402, mounting ring; 403, first sealing ring; 404, electrode body; 405, driving blade; 406, rotating plate; 407, rotating ring; 408, slip ring; 409, cleaning block; 410, adsorption block; 411, second spring; 412, insertion rod; 413, insertion hole; 414, electromagnet. DETAILED DESCRIPTION

[0034] In order to enable the above-mentioned objects, features and advantages of the present application to be more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0035] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be recognized by one skilled in the art that the present application can be practiced without the specific details and, therefore, the scope of the present application is not limited to the details disclosed herein.

[0036] As shown in one of the electromagnetic flowmeters, comprising a flowmeter module 4, Figures 1-9

[0037] Wherein, the flowmeter module 4 comprises an electrode body 404, the top of the electrode body 404 is fixedly connected with an electrode connecting rod 401, the upper end of the electrode connecting rod 401 is provided with external threads, the outer side of the electrode body 404 is fixedly connected with a mounting ring 402, the bottom of the mounting ring 402 is provided with a rotating ring 407, the surface of the rotating ring 407 is fixedly connected with a rotating plate 406, the inner side of the rotating plate 406 is fixedly connected with a cleaning block 409, the cleaning block 409 is a silica gel material member, and the cleaning block 409 is in contact with the surface of the electrode body 404, the surface of the electrode connecting rod 401 is sleeved with a first sealing ring 403.

[0038] The surface of the rotating ring 407 is fixedly connected with uniformly distributed driving leaves 405, the surface of the rotating plate 406 is fixedly connected with a slip ring 408 which is in sliding connection with the inner wall of the mounting ring 402;

[0039] The top of the slip ring 408 is provided with a ring-shaped distribution of the insertion hole 413, the inside of the mounting ring 402 is provided with a connecting cavity, the inner top wall of the connecting cavity is fixedly connected with an electromagnet 414, the inner wall of the connecting cavity is in sliding connection with an adsorption block 410, the bottom of the adsorption block 410 is fixedly connected with an insertion rod 412, the lower end of the insertion rod 412 penetrates out of the mounting ring 402 and extends to the inside of the adjacent insertion hole 413, the bottom of the adsorption block 410 and the inner wall of the connecting cavity are fixedly connected with a second spring 411, and the adsorption block 410 is an iron metal material member.

[0040] By rotating the driving leaves 405, the rotating ring 407 can be driven to rotate synchronously, in the process, the rotating plate 406 can be driven to rotate, and in turn, the cleaning block 409 can clean the surface of the electrode body 404, reducing the influence of scale adhesion on the surface of the electrode body 404 during use.

[0041] ​The electromagnet 414 in normal state is in power-off state, at this time, the plug rod 412 is inserted into the inside of the insertion hole 413 by the second spring 411, thereby limiting the position of the slip ring 408, when cleaning is needed, the electromagnetic flowmeter is first closed to stop detection, the electromagnet 414 is powered to generate suction force on the adsorption block 410 of the ferrous metal material component, thereby pulling the adsorption block 410 to move upwards, in this process, the second spring 411 can be stretched and the plug rod 412 is separated from the insertion hole 413 to release the limitation on the slip ring 408, at this time, the surface of the electrode body 404 can be cleaned by rotating the driving blade 405.

[0042] As shown in Figures 1-9 A scale prevention type electromagnetic water meter, comprising the following components:

[0043] The flow guide pipe 1, the two connecting flanges 101, the meter body 2 and the installation module 3;

[0044] The two connecting flanges 101 are respectively fixedly connected to the two ends of the flow guide pipe 1, the meter body 2 is arranged on the surface of the flow guide pipe 1, and the installation module 3 is arranged on the surface of the flow guide pipe 1 and is used for installing the flowmeter module 4;

[0045] The installation module 3 comprises a fixed cavity 317 which is arranged on the surface of the flow guide pipe 1 and is in communication with the inside of the flow guide pipe 1, a first isolation column 301 which is detachably arranged on the inner wall of the fixed cavity 317, a second sealing ring 302 which is arranged between one end of the first isolation column 301 and the inner wall of the fixed cavity 317, a descaling ring 303 which is arranged on the other end of the first isolation column 301, and a second isolation column 304 which is arranged on the other end of the descaling ring 303.

[0046] The electrode connecting rod 401 penetrates from the inside of the flow guide pipe 1 to the inside of the fixed cavity 317, the first sealing ring 403 is arranged between the electrode body 404 and the inner wall of the flow guide pipe 1, the electrode connecting rod 401 penetrates the first isolation column 301, the descaling ring 303 and the second isolation column 304 in sequence, and the descaling ring 303 is in contact with the surface of the electrode connecting rod 401.

[0047] The electrode connecting rod 401 can penetrate from the inside of the flow guide pipe 1 to the inside of the fixed cavity 317 for installation, at the same time, the installation ring 402 can be installed, and the driving blade 405 can be pushed to drive the rotation of the rotating ring 407 in the process that the fluid passes through the flow guide pipe 1, thereby reducing the situation that the scale is adhered to the surface of the electrode body 404 in use;

[0048] The surface of the second isolation column 304 is provided with a butterfly gasket 305 sleeved on the surface of the electrode connecting rod 401, the end of the butterfly gasket 305 away from the second isolation column 304 is provided with a metal gasket 311 in contact with the surface of the electrode connecting rod 401, the surface of the metal gasket 311 is fixedly connected with a terminal 316, the other end of the metal gasket 311 is provided with an isolation gasket 315, the other end of the isolation gasket 315 is threadedly connected with a fastening bolt 314 on the surface of the electrode connecting rod 401.

[0049] Specifically, the descaling ring 303 is a descaling vibration memory alloy, when water flows through the electromagnetic flow sensor, the descaling vibration memory alloy actively transmits descaling vibration to the water, increases the solubility of the substance soluble in the water, and can ensure that the measuring electrode is not scaled for a long time, thereby ensuring the long-term stability of the flow measurement accuracy.

[0050] The first sealing ring 403 and the second sealing ring 302 are arranged to enhance the sealing strength after installation, and the fastening bolt 314 and the butterfly gasket 305 can cooperate with the positioning effect of the first isolation column 301, the second isolation column 304 and the descaling ring 303, thereby completing the installation of the flowmeter module 4.

[0051] The terminal 316 is used for connection with the meter body 2, and the signal detected by the electrode body 404 can be transmitted to the meter body 2 for display. This technical means is a common technical means in existing technology applications, and will not be described in detail here.

[0052] As shown in Figures 1-9 The inner wall of the fixed cavity 317 is provided with a clamping groove 318, and the surface of the flow guide pipe 1 is provided with a sliding groove 319 in communication with the fixed cavity 317.

[0053] The surface of the flow guide pipe 1 is provided with a plurality of blocking blocks 306 uniformly distributed and matched with the fixed cavity 317, the lower end of the blocking block 306 extends into the interior of the fixed cavity 317, the upper end of the blocking block 306 has a larger diameter than the lower end, the cross section of the blocking block 306 is T-shaped, the surface of the blocking block 306 is provided with a resistance increasing ring 307 in contact with the surface of the flow guide pipe 1, the lower end of the blocking block 306 is embeddedly connected with a clamping sleeve corresponding to the electrode connecting rod 401, the blocking block 306 is a rubber material member, and the inner diameter of the clamping sleeve is smaller than the diameter of the electrode connecting rod 401.

[0054] The surface of the blocking block 306 is provided with uniformly distributed mounting cavities 310, the inner wall of the mounting cavity 310 is fixedly connected with two symmetrically distributed stoppers 309, the inner wall of the mounting cavity 310 is slidably connected with a connecting plate 313, one side of the connecting plate 313 and the inner wall of the mounting cavity 310 are fixedly connected with a first spring 312, the other side of the connecting plate 313 is fixedly connected with a clamping block 308, the other end of the clamping block 308 penetrates into the inside of the clamping groove 318, and one side of the clamping block 308 is provided with an inclined surface.

[0055] After the electromagnetic flowmeter is installed, the blocking block 306 can be inserted into the inside of the fixing cavity 317, in this process, the upper end of the electrode connecting rod 401 is inserted into the inside of the clamping sleeve, because the upper end of the electrode connecting rod 401 is provided with external threads and the inner diameter of the clamping sleeve is smaller than the diameter of the electrode connecting rod 401, after the clamping sleeve and the electrode connecting rod 401 are tightly combined, the external threads can be cut into the thread groove to enhance the connection strength of the two, so that the connection strength of the flowmeter module 4 can be enhanced, and the possibility of falling off can be reduced, in the installation process, the inclined surface of the clamping block 308 is extruded to drive the connecting plate 313 to slide along the inner wall of the mounting cavity 310 and compress the first spring 312, until it is installed in place, it can be reset under the action of the first spring 312, and then it can be inserted into the inside of the clamping groove 318, the inner wall of the clamping groove 318 cooperates with the top of the clamping block 308 to limit the position of the blocking block 306, when disassembling, by rotating the blocking block 306, the clamping block 308 can be moved to the communication position of the sliding groove 319 and the clamping groove 318 to release the limiting so that the blocking block 306 can be disassembled.

[0056] Working principle: the electrode connecting rod 401 can be installed from the inside of the flow guide pipe 1 to the inside of the fixed cavity 317, at the same time, the installation of the installation ring 402 can be installed, and the driving blade 405 can be pushed to drive the rotation of the rotating ring 407 during the fluid passing through the flow guide pipe 1, thereby reducing the scale adhesion on the surface of the electrode body 404 during use, and the descaling ring 303 is a descaling vibration memory alloy, which actively transmits descaling vibration to water when water flows through the electromagnetic flow sensor, increases the solubility of the substance soluble in water, and can ensure that the measuring electrode is not scaled for a long time, thereby ensuring the long-term stability of the flow measurement accuracy, and the first sealing ring 403 and the second sealing ring 302 are arranged to strengthen the sealing strength after installation, and the fastening bolt 314 and the butterfly gasket 305 can cooperate with the positioning effect of the first isolation column 301, the second isolation column 304 and the descaling ring 303, thereby completing the installation of the flowmeter module 4, and after the electromagnetic flowmeter is installed, the plugging block 306 is inserted into the inside of the fixed cavity 317, the upper end of the electrode connecting rod 401 is provided with external threads, and the inner diameter of the clamping sleeve is smaller than the diameter of the electrode connecting rod 401, after the clamping sleeve and the electrode connecting rod 401 are tightly fitted, the connection strength of the two can be enhanced by cutting into the thread groove of the external thread, so that the connection strength of the flowmeter module 4 can be enhanced, and the possibility of falling off can be reduced, during installation, the inclined surface of the clamping block 308 is extruded to drive the connecting plate 313 to slide along the inner wall of the installation cavity 310 and compress the first spring 312, until the clamping block 308 is reset under the action of the first spring 312, and then the clamping block 308 is inserted into the clamping groove 318, and the inner wall of the clamping groove 318 cooperates with the top of the clamping block 308 to limit the position of the plugging block 306, when disassembling, the plugging block 306 can be disassembled by rotating the plugging block 306 to move the clamping block 308 to the communication position of the sliding groove 319 and the clamping groove 318 to release the limiting to remove the plugging block 306.

[0057] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic flowmeter, comprising a flowmeter module (4), characterized in that, wherein the flowmeter module (4) comprises an electrode body (404), a top of the electrode body (404) is fixedly connected with an electrode connecting rod (401), an upper end of the electrode connecting rod (401) is provided with external threads, an outer side of the electrode body (404) is fixedly connected with a mounting ring (402), a bottom of the mounting ring (402) is provided with a rotating ring (407), a surface of the rotating ring (407) is fixedly connected with a rotating plate (406), an inner side of the rotating plate (406) is fixedly connected with a cleaning block (409), the cleaning block (409) is a member made of silica gel, and the cleaning block (409) is in contact with a surface of the electrode body (404), and a surface of the electrode connecting rod (401) is sleeved with a first sealing ring (403).

2. An electromagnetic flowmeter according to claim 1, wherein a surface of the rotating ring (407) is fixedly connected with uniformly distributed driving leaves (405), and a surface of the rotating plate (406) is fixedly connected with a slip ring (408) in sliding connection with an inner wall of the mounting ring (402). a top of the slip ring (408) is provided with ring-shaped distribution insertion holes (413), an inner portion of the mounting ring (402) is provided with a connecting cavity, an inner top wall of the connecting cavity is fixedly connected with an electromagnet (414), an inner wall of the connecting cavity is in sliding connection with an adsorption block (410), a bottom of the adsorption block (410) is fixedly connected with an insertion rod (412), a lower end of the insertion rod (412) penetrates out of the mounting ring (402) and extends into an inner portion of the adjacent insertion hole (413), and a bottom of the adsorption block (410) and the inner wall of the connecting cavity are fixedly connected with a second spring (411), and the adsorption block (410) is a member made of ferrous metal material.

3. An electromagnetic water meter of the scale prevention type, applied to the installation of the electromagnetic flowmeter according to any one of claims 1-2, characterized in that, It comprises the following components: a flow guide pipe (1), two connecting flanges (101), a surface body (2), and a mounting module (3); wherein the two connecting flanges (101) are fixedly connected to two ends of the flow guide pipe (1), the surface body (2) is arranged on a surface of the flow guide pipe (1), and the mounting module (3) is arranged on the surface of the flow guide pipe (1) and is used for mounting the flowmeter module (4); the mounting module (3) comprises a fixing cavity (317) arranged on the surface of the flow guide pipe (1) and in communication with an inner portion of the flow guide pipe (1), an inner wall of the fixing cavity (317) is detachably provided with a first isolation column (301), one end of the first isolation column (301) and the inner wall of the fixing cavity (317) are provided with a second sealing ring (302), the other end of the first isolation column (301) is provided with a descaling ring (303), and the other end of the descaling ring (303) is provided with a second isolation column (304).

4. The scale-resistant electromagnetic water meter of claim 3, wherein, The electrode connecting rod (401) penetrates from the inner side of the flow guide pipe (1) to the inside of the fixing cavity (317), the first sealing ring (403) is located between the electrode body (404) and the inner wall of the flow guide pipe (1), and the electrode connecting rod (401) penetrates the first isolation column (301), the descaling ring (303) and the second isolation column (304) in sequence, and the descaling ring (303) is in contact with the surface of the electrode connecting rod (401).

5. A scale resistant electromagnetic water meter according to claim 4, wherein The surface of the second isolation column (304) is provided with a butterfly gasket (305) sleeved on the surface of the electrode connecting rod (401), one end of the butterfly gasket (305) away from the second isolation column (304) is provided with a metal gasket (311) in contact with the surface of the electrode connecting rod (401), the surface of the metal gasket (311) is fixedly connected with a terminal (316), and the other end of the metal gasket (311) is provided with an isolation gasket (315), and the other end of the isolation gasket (315) is threadedly connected with a fastening bolt (314) on the surface of the electrode connecting rod (401).

6. A scale resistant electromagnetic water meter according to claim 5, wherein The inner wall of the fixing cavity (317) is provided with a clamping groove (318), and the surface of the flow guide pipe (1) is provided with a sliding groove (319) in communication with the fixing cavity (317).

7. A scale resistant electromagnetic water meter according to claim 6, wherein The surface of the flow guide pipe (1) is provided with evenly distributed and matched blocking blocks (306) of the fixing cavity (317), the lower end of the blocking block (306) extends into the inside of the fixing cavity (317), and the upper end diameter of the blocking block (306) is greater than the lower end diameter, the cross section of the blocking block (306) is T-shaped, the surface of the blocking block (306) is provided with a resistance increasing ring (307) in contact with the surface of the flow guide pipe (1), and the lower end of the blocking block (306) is embedded with a clamping sleeve corresponding to the electrode connecting rod (401), the clamping sleeve is a rubber material member, and the inner diameter of the clamping sleeve is smaller than the diameter of the electrode connecting rod (401).

8. A scale resistant electromagnetic water meter according to claim 7, wherein The surface of the blocking block (306) is provided with evenly distributed mounting cavities (310), the inner wall of the mounting cavity (310) is fixedly connected with two symmetrically distributed stop blocks (309), the inner wall of the mounting cavity (310) is slidably connected with a connecting plate (313), one side of the connecting plate (313) and the inner wall of the mounting cavity (310) are fixedly connected with a first spring (312), the other side of the connecting plate (313) is fixedly connected with a clamping block (308), the other end of the clamping block (308) penetrates into the inside of the clamping groove (318), and one side of the clamping block (308) is provided with an inclined surface.

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