Self-cleaning magnetic coupling transmission turbine flowmeter

Abstract

The utility model relates to turbine flowmeter technical field discloses a self -cleaning formula magnetic coupling transmission turbine flowmeter, including shell, transmitter, snap ring, front guide frame, rear guide frame, impeller still include: connecting shaft, rotation is installed in the front guide frame with rear guide frame adjacent surface bearing, the utility model, through to the magnetic coupling transmission turbine flowmeter inside impeller is washed, through with the left end connecting pipeline upstream valve of shell is closed, through the control valve of washing pipe is opened, makes external pump body can pump into the washing pipe in washing liquid, enters annular plate and collecting tube, and the corrugated pipe of multiple sets on the inside diameter of collecting tube and linear pipe injects washing liquid, and the corrugated pipe can be straightened after, thereby makes the nozzle of umbrella shape arrangement on the circumference of linear pipe can stretch out from the forming mouth, like this can wash the blade between impeller adjacent, washes away the dirt of surface adhesion.

Description

Technical Field

[0001] This utility model relates to the field of turbine flow meter technology, specifically a self-cleaning magnetic coupling drive turbine flow meter. Background Technology

[0002] A magnetically coupled turbine flow meter is a flow measurement instrument that uses the principle of magnetic coupling to achieve signal transmission and isolation. When fluid flows through the flow meter, it impacts the turbine (impeller) to make it rotate. Its rotation speed is proportional to the average flow velocity in the pipe. The rotation of the turbine is transmitted to the outside through the magnetic coupling device.

[0003] For example, Chinese Patent Publication No. CN222912819U discloses a turbine flow meter, in which a filter disc is installed inside the flow meter body, and the upper and lower ends of the filter disc are connected to the inside of the flow meter body through a booster spring. A central rod is installed in the middle of the filter disc, and a positioning rod is inserted inside the central rod. The turbine flow meter mentioned in the above-cited document can automatically clean the filter screen through fluid thrust after the filter screen becomes clogged. At the same time, when connected to external pipelines, it can effectively ensure the stability of the connection between the pipeline and the turbine flow meter.

[0004] However, after the turbine inside the aforementioned turbine flow meter rotates and is used for a period of time to pass through the fluid, some dirt will adhere to it. If it is not cleaned for a long time, it will cause the turbine rotation to be obstructed, which will hinder the flow of fluid. It is necessary to disassemble and clean it regularly. However, when disassembling and assembling the turbine in the flow meter cavity, cleaning the impeller requires disassembling and assembling the flow meter, which is extremely inconvenient. Therefore, a self-cleaning magnetic coupling drive turbine flow meter is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a self-cleaning magnetic coupling turbine flow meter that can self-clean the impeller inside the flow meter, avoiding excessive dirt buildup on the impeller and affecting the normal flow rate of the fluid.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a self-cleaning magnetic coupling drive turbine flow meter, including a housing, and further comprising: The transmitter is mounted on the top of the housing; the retaining rings are mounted on both ends of the housing; the front guide frame and the rear guide frame are mounted on two sets of retaining rings respectively; and the impeller is mounted in the middle of the front guide frame and the rear guide frame. A connecting shaft is rotatably installed in the bearings on the adjacent surfaces of the front guide frame and the rear guide frame. The impeller is movably sleeved on the connecting shaft. Positioning rods are installed at equal intervals on the circumference of the front guide frame near the impeller. A spline sleeve is installed on the side of the impeller near the rear guide frame. A spline shaft is installed at the end of the connecting shaft near the rear guide frame. A cleaning pipe installed at the bottom of the housing; An annular plate is integrally formed in the middle of the inner cavity of the outer shell. A liquid collection pipe is installed on the outer circumference of the annular plate. Corrugated pipes are evenly spaced on the outer circumference of the annular plate. A straight pipe is integrally formed at the bottom end of the corrugated pipe. A nozzle is connected through the outer circumference of the straight pipe.

[0007] Preferably, a control valve is installed at the bottom opening of the cleaning pipe, the bottom opening of the cleaning pipe is connected to the liquid collection pipe, and the circumferential surface of the liquid collection pipe is connected to the inside of the corrugated pipe.

[0008] Preferably, the impeller has positioning holes at equal intervals on the circumference of the side near the front guide frame. The positioning holes have a flared structure. The three sets of positioning rods correspond to the positioning holes. The positioning holes are located on the outside of the impeller end shaft.

[0009] Preferably, a spring plate is installed between the impeller and the end bearing of the rear guide frame, and the spline sleeve has an outward flare on the side near the rear guide frame, and the spline sleeve is nested on the outside of the spline shaft.

[0010] Preferably, the inner cavity of the outer shell has a mounting groove in the middle, the annular plate is integrally formed inside the mounting groove, the inner diameter of the annular plate has equally spaced forming openings, the bottom end of the straight tube has an integrally formed sealing block, and the sealing block is movably installed at the opening of the inner cavity of the forming opening.

[0011] Preferably, the top end of the corrugated pipe is connected to the forming port and the liquid collection pipe at the top of the inner cavity of the forming port, and a return spring is installed between the top of the inner cavity of the forming port and the outer circumference of the corrugated pipe.

[0012] Preferably, the multiple sets of nozzles are arranged in an umbrella shape with equal spacing, and the corrugated pipe and the inner cavity of the straight pipe form a T-shaped structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In this invention, when cleaning the internal impeller of the magnetically coupled turbine flow meter, the valve upstream of the connecting pipe at the left end of the outer casing is closed, and the control valve at the cleaning pipe is opened, so that the external pump body can pump the cleaning fluid into the cleaning pipe, into the annular plate and the collecting pipe. After the cleaning fluid is injected into the multiple sets of corrugated pipes and straight pipes on the inner diameter of the collecting pipe, the corrugated pipes can be straightened, so that the umbrella-shaped nozzles on the circumference of the straight pipes can extend out from the forming port. This can rinse the adjacent blades of the impeller and clean away the dirt adhering to the surface. In this invention, when the cleaning fluid is sprayed from the nozzle onto the inclined surface of the adjacent blades of the impeller, the impeller can move along the connecting shaft towards the guide frame due to the impact thrust of the cleaning fluid. This allows the spline sleeve on the impeller end shaft to disengage from the spline shaft. At this time, the three sets of positioning rods can move closer to each other with the cooperation of the positioning holes and the outward flare. Simultaneously, the impeller can rotate slightly, thereby allowing the three sets of positioning rods to insert into the positioning holes. This locks the impeller in a locked state, which can more thoroughly wash away the stains adhering between the adjacent blades of the impeller and improve the washing effect. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the side cross-sectional structure of this utility model; Figure 3 This is a schematic diagram of the front guide frame and impeller structure in this utility model; Figure 4 This is a schematic diagram of the rear guide frame and impeller structure in this utility model; Figure 5 This is a schematic diagram of the annular plate structure in this utility model; Figure 6 for Figure 3 A magnified view of the structure at point A in the middle; Figure 7 for Figure 4 A magnified schematic diagram of the structure at point B in the middle; Figure 8 for Figure 5 A magnified schematic diagram of the structure at point C.

[0015] In the diagram: 100, outer casing; 200, cleaning pipe; 300, annular plate; 10, mounting groove; 11, transmitter; 12, retaining ring; 13, front guide frame; 14, rear guide frame; 15, impeller; 16, connecting shaft; 131, positioning rod; 141, splined shaft; 142, spring plate; 151, positioning hole; 152, splined sleeve; 1521, flared opening; 21, control valve; 31, liquid collection pipe; 32, forming port; 33, bellows; 34, straight pipe; 35, nozzle; 36, return spring; 37, sealing block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Please see Figure 1-8 This utility model provides a technical solution: a self-cleaning magnetic coupling drive turbine flow meter, including a housing 100, and further including: A transmitter 11 is installed on the top of the housing 100, retaining rings 12 are installed at both ends of the housing 100, a front guide frame 13 and a rear guide frame 14 are respectively installed on the two sets of retaining rings 12, and an impeller 15 is installed in the middle of the front guide frame 13 and the rear guide frame 14. A connecting shaft 16 is rotatably installed in the bearings on the adjacent surfaces of the front guide frame 13 and the rear guide frame 14. The impeller 15 is movably sleeved on the connecting shaft 16. Positioning rods 131 are installed at equal intervals on the circumference of the front guide frame 13 near the impeller 15. A spline sleeve 152 is installed on the side of the impeller 15 near the rear guide frame 14. A spline shaft 141 is installed on the end of the connecting shaft 16 near the rear guide frame 14. A cleaning pipe installed at the bottom of the housing 100; An annular plate 300 is integrally formed in the middle of the inner cavity of the outer shell 100. A liquid collection pipe 31 is installed on the outer circumference of the annular plate 300. Corrugated pipes 33 are evenly spaced on the outer circumference of the annular plate 300. A straight pipe 34 is integrally formed at the bottom end of the corrugated pipe 33. A nozzle 35 is connected through the outer circumference of the straight pipe 34.

[0018] The cleaning pipe 200 is equipped with a control valve 21 at its bottom opening. The bottom opening of the cleaning pipe 200 is connected to the liquid collection pipe 31. The circumferential surface of the liquid collection pipe 31 is connected to the inside of the corrugated pipe 33. Through the external pump body, the external cleaning fluid can be automatically pumped into the cleaning pipe 200 and into the annular plate 300 and the liquid collection pipe 31, so that the umbrella-shaped nozzles 35 on the circumference of the straight pipe 34 can extend out from the forming port 32. This allows the adjacent blades of the impeller 15 to be rinsed and the dirt adhering to the surface to be cleaned.

[0019] The impeller 15 has 151 positioning holes 151 evenly spaced on its circumference near the front guide frame 13. The positioning holes 151 have a flared structure. Three sets of positioning rods 131 correspond to the positioning holes 151. The positioning holes 151 are located on the outer side of the end shaft of the impeller 15. The spline sleeve 152 has an outwardly flared opening 1521 near the rear guide frame 14. The spline sleeve 152 is nested on the outside of the spline shaft 141. When the cleaning fluid is sprayed from the nozzle 35 onto the rear inclined surface of the adjacent blades of the impeller 15, the impeller 15 can be subjected to the impact thrust of the cleaning fluid along the... The connecting shaft 16 moves forward to the guide frame 13, allowing the spline sleeve 152 on the impeller 15 end shaft to disengage from the spline shaft 141. At this time, the three sets of positioning rods 131 can move closer to each other with the cooperation of the positioning hole 151 and the outer flare 1521. Simultaneously, the impeller 15 can rotate slightly, thereby allowing the three sets of positioning rods 131 to insert into the positioning hole 151. This locks the impeller 15, which allows for more thorough rinsing of the dirt adhering between adjacent blades of the impeller 15 and improves the rinsing effect.

[0020] The outer shell 100 has an installation groove 10 in the middle of its inner cavity. The annular plate 300 is integrally formed inside the installation groove 10. The annular plate 300 has forming openings 32 at equal intervals on its inner diameter. The bottom end of the straight tube 34 has a sealing block 37 integrally formed. The sealing block 37 is movably installed at the opening of the inner cavity of the forming opening 32. The top end of the corrugated tube 33 is connected to the forming opening 32 and the liquid collection tube 31 at the top of the inner cavity of the forming opening 32. A return spring 36 is installed between the top of the inner cavity of the forming opening 32 and the outer circumference of the corrugated tube 33. When the cleaning fluid stops being injected into the liquid collection tube 31, the corrugated tube 33 is reset by the elastic force of the return spring 36, which pulls the nozzle 35 and the sealing block 37 back into the forming opening 32 to seal it.

[0021] Among them, multiple sets of nozzles 35 are arranged in an umbrella shape with equal spacing. The inner cavity of the bellows 33 and the straight tube 34 forms a T-shaped structure. The T-shaped cavity formed by the bellows 33 and the straight tube 34 can increase the pressure of the cleaning fluid, so that the bellows 33 can be straightened. The umbrella-shaped nozzles 35 arranged on the circumference of the straight tube 34 can extend out from the forming port 32, so as to rinse the adjacent blades of the impeller 15 and clean the dirt adhering to the surface.

[0022] In this embodiment, the front guide frame 13 and the rear guide frame 14 are connected in the inner cavity bushing of the outer casing 100 by the retaining rings 12 at both ends. The impeller 15 rotates, and since the rotational angular velocity of the impeller 15 is proportional to the fluid velocity, the fluid velocity can be obtained from the rotational angular velocity of the impeller 15, and thus the fluid flow rate of the pipeline can be calculated. When the blades of the impeller 15 cut the magnetic lines of force generated by the magnetoelectric converter in the preamplifier of the transmitter 11, it causes a change in the magnetic flux in the sensing coil. The preamplifier in the transmitter 11 amplifies and shapes the periodic change signal of the magnetic flux detected by the internal sensing coil to generate a pulse square wave signal proportional to the flow velocity, thereby measuring the flow rate of the fluid. This magnetic coupling drive turbine flow meter working technology is existing technology and will not be described in detail here. In this embodiment, when cleaning the impeller 15 inside the magnetically coupled turbine flow meter, the valve upstream of the pipe connected to the left end of the housing 100 is closed, and the control valve 21 at the cleaning pipe 200 is opened, so that the external pump can pump the cleaning fluid into the cleaning pipe 200, into the annular plate 300 and the collection pipe 31. After the cleaning fluid is injected into the multiple sets of corrugated pipes 33 and straight pipes 34 on the inner diameter of the collection pipe 31, the corrugated pipes 33 can be straightened, so that the umbrella-shaped nozzles 35 on the circumference of the straight pipe 34 can extend out from the forming port 32. This can rinse the adjacent blades of the impeller 15 and clean away the dirt adhering to the surface. In this embodiment, when the cleaning fluid is sprayed from the nozzle 35 onto the rear inclined surface of the adjacent blades of the impeller 15, the impeller 15 can be moved forward along the connecting shaft 16 to the guide frame 13 by the impact thrust of the cleaning fluid, so that the spline sleeve 152 on the end shaft of the impeller 15 can be disengaged from the spline shaft 141. At this time, the three sets of positioning rods 131 can move closer to each other with the cooperation of the positioning hole 151 and the outer flare 1521, and the impeller 15 can rotate slightly, so that the three sets of positioning rods 131 are inserted into the positioning hole 151, thus making the impeller 15 in a locked state. This allows for more thorough rinsing of the dirt adhering between the adjacent blades of the impeller 15 and improves the rinsing effect. In this embodiment, after cleaning the impeller 15, the thrust on the rear inclined surface of the impeller 15 disappears, the spring plate 142 pulls, and the spline sleeve 152 at the end shaft of the impeller 15 is re-nested on the spline shaft 141 through the flared outer opening 1521. The impeller 15 is reset to the initial position on the side of the connecting shaft 16 near the rear guide frame 14, and the impeller 15 can continue to measure the flow rate of the fluid passing through the front side. Working principle: When the magnetically coupled turbine flow meter is self-cleaning, first close the valve upstream of the pipe connected to the left end of the housing 100 and open the control valve 21 at the cleaning pipe 200. The cleaning fluid can be pumped into the cleaning pipe 200 by the external pump body, and then into the annular plate 300 and the collection pipe 31. After the cleaning fluid is injected into the multiple sets of corrugated pipes 33 and straight pipes 34 on the inner diameter of the collection pipe 31, the corrugated pipes 33 can be straightened, so that the umbrella-shaped nozzles 35 on the circumference of the straight pipe 34 can extend out from the forming port 32. This can rinse the adjacent blades of the impeller 15 and clean the dirt adhering to the surface. After cleaning, the waste liquid can flow out from the right end of the outer casing 100. When the cleaning liquid stops being injected into the collection pipe 31, the bellows 33 is reset by the spring force of the reset spring 36, which pulls the nozzle 35 and the sealing block 37 back into the forming port 32 to close them. At this time, the thrust of the rear inclined surface of the impeller 15 disappears. Through the pulling force of the spring plate 142, the spline sleeve 152 at the end shaft of the impeller 15 is re-nested on the spline shaft 141 through the flared outer flare 1521. This allows the impeller 15 to be reset back onto the connecting shaft 16, so that the flow rate measurement of the fluid can continue.

[0023] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning magnetically coupled turbine flow meter, comprising a housing (100), a transmitter (11) mounted on the top of the housing (100), retaining rings (12) mounted at both ends of the housing (100), a front guide frame (13) and a rear guide frame (14) respectively mounted on two sets of retaining rings (12), and an impeller (15) mounted in the middle of the front guide frame (13) and the rear guide frame (14); characterized in that, Also includes: A connecting shaft (16) is rotatably installed in the bearings on the adjacent surfaces of the front guide frame (13) and the rear guide frame (14). The impeller (15) is sleeved on the connecting shaft (16). Positioning rods (131) are installed at equal intervals on the circumference of the front guide frame (13) near the impeller (15). A spline sleeve (152) is installed on the side of the impeller (15) near the rear guide frame (14). A spline shaft (141) is installed on one end of the connecting shaft (16) near the rear guide frame (14). A cleaning pipe installed at the bottom of the housing (100); An annular plate (300) is integrally formed in the middle of the inner cavity of the outer shell (100). A liquid collection pipe (31) is installed on the outer circumference of the annular plate (300). Corrugated pipes (33) are evenly spaced on the outer circumference of the annular plate (300). A straight pipe (34) is integrally formed at the bottom end of the corrugated pipe (33). A nozzle (35) is connected through the outer circumference of the straight pipe (34).

2. The self-cleaning magnetically coupled turbine flow meter according to claim 1, characterized in that: A control valve (21) is installed at the bottom opening of the cleaning pipe (200). The bottom opening of the cleaning pipe (200) is connected to the liquid collection pipe (31). The circumferential surface of the liquid collection pipe (31) is connected to the inside of the corrugated pipe (33).

3. The self-cleaning magnetically coupled turbine flow meter according to claim 1, characterized in that: The impeller (15) has positioning holes (151) spaced at equal intervals on the circumference of the side near the front guide frame (13). The positioning holes (151) are flared structures. The three sets of positioning rods (131) correspond to the positioning holes (151). The positioning holes (151) are located on the outer side of the end shaft of the impeller (15).

4. The self-cleaning magnetically coupled turbine flow meter according to claim 1, characterized in that: A spring plate (142) is installed between the impeller (15) and the end bearing of the rear guide frame (14). The spline sleeve (152) has an outward flare (1521) on the side near the rear guide frame (14). The spline sleeve (152) is nested on the outside of the spline shaft (141).

5. A self-cleaning magnetically coupled turbine flow meter according to claim 1, characterized in that: The inner cavity of the outer shell (100) is provided with an installation groove (10), the annular plate (300) is integrally formed inside the installation groove (10), the inner diameter of the annular plate (300) is provided with forming openings (32) at equal intervals, the bottom end of the straight tube (34) is integrally formed with a sealing block (37), and the sealing block (37) is movably installed at the opening of the inner cavity of the forming opening (32).

6. A self-cleaning magnetically coupled turbine flow meter according to claim 5, characterized in that: The top end of the corrugated pipe (33) is connected to the forming port (32) and the liquid collection pipe (31) at the top of the inner cavity of the forming port (32). A return spring (36) is installed between the top of the inner cavity of the forming port (32) and the outer circumference of the corrugated pipe (33).

7. A self-cleaning magnetically coupled turbine flow meter according to claim 1, characterized in that: The multiple sets of nozzles (35) are arranged in an umbrella shape with equal spacing, and the inner cavity of the corrugated pipe (33) and the straight pipe (34) form a T-shaped structure.

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