Electromagnetic flowmeter sensor

Abstract

The utility model provides an electromagnetic flowmeter sensor which comprises a flow guide pipe assembly, a flow guide pipe, a flow guide pipe, a flow guide pipe, a flow guide pipe and a flow guide pipe assembly, wherein the flow guide pipe assembly is internally provided with a flow guide cavity; the shell is arranged outside the flow guide pipe assembly in a sleeving manner; the two coils are arranged on the inner wall of the shell; the electrode penetrates through the wall surface of the flow guide pipe assembly, and one end of the electrode extends into the flow guide cavity and is used for being in contact with a to-be-detected medium; the converter connecting assembly is arranged on the shell; the coil is connected with the converter connecting assembly through the first lead; the electrode is connected with the converter connecting assembly through the second lead; and the two ends of the shell are respectively connected with one flange. The coil is installed on the shell, the weight borne by the flow guide pipe can be reduced, the wall thickness of the flow guide pipe is reduced, cost is reduced, the first lead and the second lead are connected with the converter through the converter connecting assembly, and reliable connection of the leads can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flowmeter technical field, especially relate to a kind of electromagnetic flowmeter sensor. BACKGROUND

[0002] In industrial automation instrument, electromagnetic flowmeter is a kind of instrument according to Faraday's law of electromagnetic induction to measure the volume flow of conductive liquid, its measurement is not influenced by external factors and fluid itself characteristics, and there is no obstruction in the interior, so it is widely used. Currently, the flow guide tube of small-bore electromagnetic flowmeter is usually stainless steel seamless pipe, and the flow guide tube of medium-large-bore electromagnetic flowmeter is generally rolled from stainless steel plate. The coil in the existing electromagnetic flowmeter sensor is mostly installed on the outer wall of the flow guide tube, so that the flow guide tube not only bears the fluid pressure circulating in the flow guide tube, but also needs to bear the gravity of the coil, which requires the wall thickness of the flow guide tube. The flow guide tube must have a certain thickness, especially for large-bore electromagnetic flowmeters, the coil is heavier, and the price of stainless steel material is expensive. Thickening the wall thickness of the flow guide tube undoubtedly increases the cost. In addition, the lead of the existing electromagnetic flowmeter sensor is mostly directly led out from the upper part of the sensor and directly connected with the lead of the converter. This wiring method is prone to lead entanglement, extrusion or falling off due to improper operation during assembly, thereby affecting the normal use of the flowmeter. SUMMARY

[0003] The utility model aims at providing a kind of electromagnetic flowmeter sensor, coil is installed on shell, can reduce the weight that flow guide tube bears, thin the wall thickness of flow guide tube, reduce cost, and first lead and second lead are connected with converter by converter connecting assembly, can realize the reliable connection of lead.

[0004] In order to achieve the above purpose, the utility model provides a kind of electromagnetic flowmeter sensor, which comprises:

[0005] A flow guide tube assembly has a flow guide cavity for the medium to be measured to pass through;

[0006] A shell is sleeved on the flow guide tube assembly;

[0007] Two coils are installed on the inner wall of the shell, and a space is left between the shell and the flow guide tube assembly for accommodating the coils;

[0008] An electrode is provided on the wall surface of the flow guide tube assembly, and one end of the electrode extends into the flow guide cavity for contacting the medium to be measured;

[0009] A converter connecting assembly is provided on the shell;

[0010] a first lead wire, the coil being connected to the converter connection assembly through the first lead wire;

[0011] a second lead wire, the electrode being connected to the converter connection assembly through the second lead wire;

[0012] two flanges, one of the flanges being connected to each end of the housing.

[0013] Optionally, the flow tube assembly comprises a flow tube and a liner, the liner being arranged on the inner wall of the flow tube.

[0014] Optionally, the electrode is sleeved with an insulating sleeve through a portion of the flow tube to isolate the electrode from the flow tube.

[0015] Optionally, the converter connection assembly comprises a connecting tube and a wiring board, the connecting tube being connected to the housing, the tube opening of the connecting tube extending out of the housing being covered by the wiring board.

[0016] Optionally, the wiring board is a circuit board, the wiring board being provided with wiring terminals on both the side facing the flow tube assembly and the side away from the flow tube assembly.

[0017] Optionally, the connecting tube is provided with a hole shoulder at the tube opening extending out of the housing, the wiring board being mounted on the hole shoulder.

[0018] Optionally, the converter connection assembly comprises a matching board for connecting to a converter, the matching board being connected to the end of the connecting tube extending out of the housing, the matching board being provided with a through hole communicating with the connecting tube.

[0019] Optionally, the electromagnetic flowmeter sensor comprises an electrode cover, the electrode cover being mounted on the outer wall of the flow tube and covering the electrode, the electrode cover being provided with a hole for the second lead wire to pass through.

[0020] Optionally, the housing and the flow tube are filled with a first filler.

[0021] Optionally, the electromagnetic flowmeter sensor comprises a coil fixing assembly, each coil being mounted on the inner wall of the housing through at least two coil fixing assemblies, the coil fixing assembly comprising a clamping ring member and a screw, the screw being arranged on the inner wall of the housing, the coil being connected to the screw through the clamping ring member.

[0022] As configured above, the coil is mounted on the shell, avoiding mounting the coil on the flow guide pipe, reducing the weight borne by the flow guide pipe, thinning the wall thickness of the flow guide pipe, significantly reducing the cost, and the first lead wire and the second lead wire are connected with the converter through the converter connecting assembly, realizing reliable connection of the lead wire, avoiding the lead wire entanglement, extrusion or falling off of the lead wire of the sensor and the lead wire of the converter in the prior art, and ensuring the lead wire connection quality. BRIEF DESCRIPTION OF DRAWINGS

[0023] Those skilled in the art should understand that the provided drawings are used to better understand the present application, and do not constitute any limitation on the scope of the present application. Among them:

[0024] Figure 1 It is a schematic diagram of the electromagnetic flowmeter sensor of an embodiment of the present application;

[0025] Figure 2 It is a connection schematic diagram of the shell and the flange of an embodiment of the present application;

[0026] Figure 3 It is Figure 1 the enlarged view of B of

[0027] Figure 4 It is the enlarged view of A of Figure 1 .

[0028] Among them, the reference signs are as follows:

[0029] 11-flow guide pipe; 12-liner; 2-shell; 31-coil; 32-first screw; 33-clip member; 41-electrode; 42-insulating sleeve; 43-electrode cover; 44-second filler; 5-converter connecting assembly; 51-connecting pipe; 52-wiring board; 53-wiring terminal; 54-matching plate; 55-through hole; 56-second screw; 61-first lead wire; 62-second lead wire; 63-ground wire; 7-flange; 71-extension; 8-stop bar. DETAILED DESCRIPTION

[0030] In this paper, unless otherwise stated, the terms "upper", "lower", "left", "right", "inner", "outer", "front", "back", "top", "bottom", etc. are used to indicate the orientation or positional relationship based on the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation and operation, therefore it cannot be understood as a limitation on the present application.

[0031] The specific embodiments of the present application will be described in more detail below with reference to the accompanying drawings. The advantages and features of the present application will be more apparent from the following description. It should be noted that all the drawings are in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the present application.

[0032] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, and will be described in detail.

[0033] Figure 1 is a schematic diagram of an electromagnetic flowmeter sensor of an embodiment of the present application, Figure 2 is a schematic diagram of the connection of the shell and the flange of an embodiment of the present application, please refer to Figure 1 and Figure 2 The embodiment of the present application provides an electromagnetic flowmeter sensor, which comprises a flow guide pipe assembly, a shell 2, two coils 31, electrodes 41, a converter connecting assembly 5, a first lead wire 61, a second lead wire 62 and two flanges 7.

[0034] The flow guide pipe assembly has a flow guide cavity for the passage of the medium to be measured inside, further, the flow guide pipe assembly comprises a flow guide pipe 11 and a liner 12, the liner 12 is arranged on the inner wall of the flow guide pipe 11, and the liner 12 can generally be rubber or polytetrafluoroethylene.

[0035] The shell 2 is sleeved on the flow guide pipe assembly, and the shell 2 is cylindrical, for example, and the two ends of the shell 2 are respectively connected with a flange 7, and in the embodiment, the flange 7 is provided with an extension 71 extending in the axial direction, the outer diameter of the end of the extension 71 is equivalent to the inner diameter of the shell 2, and the shell 2 is sleeved on the extension 71 of the flange 7 and welded with the extension 71. The shell is directly welded with the flange, instead of the side plate welded on the flow guide pipe and then the shell welded on the side plate in the prior art, thereby reducing the welding workload. Further, the shell 2 comprises an upper half shell and a lower half shell, and a space for accommodating the flow guide pipe is formed in the middle after the upper half shell and the lower half shell are welded, and the welding of the upper half shell and the lower half shell is provided with a blocking strip 8 to facilitate the filling of the upper half shell and the lower half shell during welding, and to prevent the welding slag from falling into the inside of the electromagnetic flowmeter sensor to cause the risk of short circuit.

[0036] Two coils 31 are installed on the inner wall of the shell 2, and the coils 31 are connected with the converter connecting assembly 5 through the first lead 61. Compared with the prior art of installing the coil on the flow guide pipe, the coil 31 is installed on the shell 2 in the utility model, only the wall thickness of the shell 2 needs to be increased, the weight borne by the flow guide pipe is reduced, so that the wall thickness of the flow guide pipe 11 can be reduced, the shell 2 can generally adopt carbon steel material, the flow guide pipe 11 generally adopts stainless steel material, the price of carbon steel is relatively cheaper than that of stainless steel, and the cost is reduced. The shell 2 and the flow guide pipe assembly are left with a space for accommodating the coil 31, preferably, the shell 2 and the flow guide pipe 11 are filled with a first filler, so as to share the stress of the flow guide pipe 11 to the shell 2, increase the reliability, and also reduce the requirement on the wall thickness of the flow guide pipe 11, and the first filler can be AB glue (two-liquid mixed hardening glue).

[0037] The electromagnetic flowmeter sensor comprises a coil fixing assembly, each coil 31 is installed on the inner wall of the shell 2 through at least two coil fixing assemblies, the coil fixing assembly comprises a ring member 33 and a first screw 32, the first screw 32 is arranged on the inner wall of the shell 2, and the coil 31 is connected with the first screw 32 through the ring member 33. Exemplarily, the ring member 33 can comprise two clamps, and a hole for the coil 31 to pass through is formed in the middle of the two clamps after the two clamps are folded. The coil 31 can be wound by high-temperature-resistant enameled wire, and the outer surface of the coil 31 is wrapped with a layer of glass fiber adhesive tape. The fixing position of the coil on the inner wall of the shell 2 is circled by using a marker pen, the coil 31 is removed, the first screw 32 is installed on the inner wall of the shell according to the coil fixing position, and then the ring member 33 and the coil are installed.

[0038] The electrode 41 penetrates the wall surface of the flow guide pipe assembly, one end of the electrode 41 extends into the flow guide cavity for contacting the medium to be measured. Exemplarily, reference can be made to Figure 3The electrode 41 is pulled out from the inside of the flow tube 11 to the outside through the electrode hole by means of a positioning tool, and the electrode 41 is fixed to the outer wall of the flow tube 11 by means of a tool and a series of fasteners after the electrode is pulled out. The part of the electrode 41 passing through the flow tube 11 is sleeved with an insulating sleeve 42 to isolate the electrode 41 from the flow tube 11. The material of the insulating sleeve 42 can be, for example, polytetrafluoroethylene, so as to avoid the conduction between the electrode 41 and the flow tube 11 affecting the measurement work of the electromagnetic flowmeter. The electromagnetic flowmeter sensor comprises an electrode cover 43 installed on the outer wall of the flow tube 11 and covering the electrode 41, and the electrode cover 43 is provided with a hole for the second lead wire 62 to pass through, and the electrode 41 is connected with the converter connection assembly 5 through the second lead wire 62. For example, the electrode cover 43 is spot-welded on the outer wall of the flow tube, and the inside of the electrode cover 43 is filled with a second filler 44, which can be, for example, silica gel, so as to prevent impurities from falling on the electrode 41 and causing the electrode 41 to conduct with places that should not be conducted, thereby increasing the reliability.

[0039] Reference can be made to Figure 4 The converter connection assembly 5 is arranged on the shell 2, and it can be understood that the shell 2 is provided with an opening in communication with the converter connection assembly 5, and the lead wires in the electromagnetic flowmeter sensor are led out from the opening. Further, the converter connection assembly 5 comprises a connecting pipe 51 and a wiring board 52, the connecting pipe 51 is connected with the shell 2, and the pipe mouth of the connecting pipe 51 extending out of the shell 2 is covered by the wiring board 52. The wiring board 52 is a circuit board, and the wiring board 52 is provided with a wiring terminal 53 on the side facing the flow tube assembly and the side facing away from the flow tube assembly. Generally, a ground wire 63 is further connected between the electromagnetic flowmeter sensor and the converter, and the ground wire 63 can be led out from the first screw 32 and connected with the wiring terminal 53, for example. In the embodiment, the first lead wire 61 and the ground wire 63 are routed along the inner wall surface of the shell 2 to the wiring board 52.

[0040] For example, the number of electrodes 41 is two and symmetrically distributed on the flow tube 11, each electrode 41 leads out a second lead 62, the two second leads 62 are twisted and led out along the outer wall of the flow tube upward to reduce the electromagnetic induction noise caused by the magnetic lines on the lead. Each coil 31 leads out a first lead 61, plus a ground wire 63, so there are at least five terminals 53 on each face of the terminal board 52. In this embodiment, the face of the terminal board 52 away from the flow tube assembly is provided with five female plug terminals for cooperating with male terminals to connect the leads of the converter to the terminal board. The connecting tube 51 extending out of the tube opening of the housing 2 is provided with a hole shoulder, and the terminal board 52 is mounted on the hole shoulder, and the terminal board 52 can be fixed on the hole shoulder by the second screw 56. The converter connection assembly 5 includes a matching board 54 for connecting with the converter, the matching board 54 is connected with the end of the connecting tube 51 extending out of the housing 2, and the matching board 54 is provided with a through hole 55 communicating with the connecting tube 51. All the leads inside the electromagnetic flowmeter sensor can be fixed by silicone spot coating, such as the first lead 61 and the ground wire 63 are fixed on the inner wall of the housing by silicone spot coating to prevent the leads from falling off and increase reliability.

[0041] As configured above, the utility model installs the coil 31 on the housing 2, avoids installing the coil on the flow tube 11, reduces the weight borne by the flow tube 11, the wall thickness of the flow tube 11 can be thinned, the cost is significantly reduced, and the first lead 61 and the second lead 62 are connected with the converter through the converter connection assembly 5, reliable connection of the leads is realized, the situation of lead entanglement, extrusion or falling off when the leads of the sensor and the leads of the converter are directly connected in the prior art is avoided, and the lead connection quality is guaranteed.

[0042] It should be noted that the references in the description to "one embodiment", "an embodiment", "the embodiment", "some embodiments" and the like indicate that the described embodiment can include a particular feature, structure, or characteristic, but not necessarily every embodiment. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, where a particular feature, structure or characteristic is described in connection with an embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure or characteristic in connection with other embodiments whether or not explicitly described.

[0043] It should be noted that the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0044] It should also be noted that, although the utility model has disclosed as above with preferred embodiments, the above embodiments are not used to limit the utility model. For any skilled person in the art, without departing from the scope of the utility model technical scheme, the above disclosed technical content can be used to make many possible changes and modifications to the utility model technical scheme, or modified as equivalent examples of equivalent changes. Therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model, which does not deviate from the content of the utility model technical scheme, still belongs to the scope of the utility model technical scheme protection.

[0045] It should also be understood that, unless specifically described or indicated, the terms "first", "second", "third" and the like in the specification are merely used to distinguish different components, elements, steps and the like in the specification, and not to indicate a logical relationship or sequence relationship between the components, elements, steps and the like.

[0046] In addition, it should be recognized that the terms described herein are used only to describe particular embodiments and not to limit the scope of the utility model. It must be noted that the singular forms "a", "an", and "the" used herein include plural referents unless the context clearly dictates otherwise. For example, reference to "a step" or "a means" means reference to one or more steps or means and can include sub-steps and sub-means. All conjunctions used herein should be interpreted in the broadest possible sense. In addition, the word "or" should be interpreted as having the logical "or" definition rather than the logical "exclusive or" definition, unless the context clearly indicates otherwise. In addition, the implementation of the method and / or device in the embodiments of the utility model can include manually, automatically or a combination of performing selected tasks.

Claims

1. An electromagnetic flowmeter sensor characterized by, The electromagnetic flowmeter sensor comprises: a flow guide pipe assembly, the inside of the flow guide pipe assembly having a flow guide cavity for the medium to be measured to pass through; a shell, which is sleeved outside the flow guide pipe assembly; two coils, the two coils being mounted on the inner wall of the shell, and a space for accommodating the coils being left between the shell and the flow guide pipe assembly; an electrode, which is provided through the wall of the flow guide pipe assembly, one end of the electrode extending into the flow guide cavity for contacting the medium to be measured; a converter connecting assembly, which is provided on the shell; a first lead wire, the coil being connected with the converter connecting assembly through the first lead wire; a second lead wire, the electrode being connected with the converter connecting assembly through the second lead wire; two flanges, one of the flanges being connected with each end of the shell.

2. The electromagnetic flowmeter sensor of claim 1, wherein, The flow guide pipe assembly comprises a flow guide pipe and a liner, the liner being provided on the inner wall of the flow guide pipe.

3. The electromagnetic flowmeter sensor of claim 2, wherein, The electrode is sleeved with an insulating sleeve through the part of the flow guide pipe, so as to isolate the electrode from the flow guide pipe.

4. The electromagnetic flowmeter sensor of claim 1, wherein, The converter connecting assembly comprises a connecting pipe and a wiring board, the connecting pipe being connected with the shell, the connecting pipe extending out of the pipe opening of the shell being covered by the wiring board.

5. The electromagnetic flowmeter sensor of claim 4, wherein, The wiring board is a circuit board, the wiring board being provided with a wiring terminal on one side facing the flow guide pipe assembly and on the other side facing away from the flow guide pipe assembly.

6. The electromagnetic flow meter sensor of claim 4, wherein, The connecting pipe extending out of the pipe opening of the shell is provided with a hole shoulder, and the wiring board is mounted on the hole shoulder.

7. The electromagnetic flowmeter sensor of claim 4, wherein, The converter connecting assembly comprises a matching board for connecting with a converter, the matching board being connected with one end of the connecting pipe extending out of the shell, and the matching board being provided with a through hole communicating with the connecting pipe.

8. The electromagnetic flow meter sensor of claim 1, wherein, The electromagnetic flowmeter sensor comprises an electrode cover, the electrode cover being mounted on the outer wall of the flow guide pipe and covering the electrode, and the electrode cover being provided with a hole for the second lead wire to pass through.

9. The electromagnetic flow meter sensor of claim 1, wherein, The shell and the flow guide pipe are filled with a first filler.

10. The electromagnetic flow meter sensor of claim 1, wherein, The electromagnetic flowmeter sensor comprises a coil fixing assembly, each coil being mounted on the inner wall of the shell through at least two coil fixing assemblies, the coil fixing assembly comprising a clamping ring member and a screw, the screw being provided on the inner wall of the shell, and the coil being connected with the screw through the clamping ring member.

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