Sensor structure of micro-small-caliber electromagnetic flowmeter

Abstract

The utility model discloses a sensor structure of a micro-small-caliber electromagnetic flowmeter, which relates to the technical field of electromagnetic flowmeter sensors and comprises a mold core, an inner shell is slidably clamped on the outer surface of the middle of the mold core, and two symmetrically distributed finished coils are arranged on each of the upper side and the lower side of the inner shell. Magnetic cores are installed in the middles of the two finished coils, magnetic pole heads are slidably clamped in the middles of the two magnetic cores, flat-head set screws are installed in the middles of the two magnetic cores in a threaded mode, and one ends of the two flat-head set screws make contact with one ends of the magnetic pole heads; the flange cover of the external interface assembly can be screwed through the third bolt to press the sealing surfaces on the two sides of the end face of the mold core, so that internal liquid cannot leak, meanwhile, external liquid cannot immerse into the meter body, the sensor changes an original lining process mode, a high-cost mold extrusion mode is abandoned, and the production cost is reduced. The manufacturing cost is reduced, and the manufacturing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electromagnetic flowmeter sensor technical field, concretely is a kind of sensor structure of small-bore electromagnetic flowmeter. BACKGROUND

[0002] At present, the market of small-bore flowmeter is mainly dominated by imported brands. Since the electrode spacing of small-bore electromagnetic flowmeter is relatively small (less than 10 mm), and the electrode installation is difficult, the imported flowmeter mechanism currently uses integrated die-casting method. When die-casting the insulating pipe, the electrode is placed in the pipe to realize the sealing of the electrode. Therefore, a relatively complex injection mold is required to manufacture the electrode and the measuring pipe. The existing technology uses mold die-casting forming. The disadvantages are high one-time mold cost, complex process, large magnetic gap spacing and low magnetic field strength.

[0003] To solve the above problems, the inventor proposes a sensor structure of small-bore electromagnetic flowmeter. SUMMARY

[0004] To solve the problem of using mold die-casting forming in the prior art, which has the disadvantages of high one-time mold cost, complex process, large magnetic gap spacing and low magnetic field strength, the purpose of the utility model is to provide a sensor structure of small-bore electromagnetic flowmeter.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: a sensor structure of small-bore electromagnetic flowmeter, comprising a mold core, an inner shell body is slidably clamped on the outer surface of the middle part of the mold core, two symmetrical product coils are arranged on the upper and lower sides of the inner shell body, a magnetic core is installed in the middle part of each product coil, a magnetic pole head is slidably clamped on the middle part of each magnetic core, a flat head set screw is threadedly installed on the middle part of each magnetic core, one end of each flat head set screw is in contact with one end of the magnetic pole head, a No. 1 bolt is threadedly installed on the opposite middle part of each magnetic core, one end of each No. 1 bolt is in contact with one end of the flat head set screw, one end of each magnetic pole head is slidably clamped in the middle part of the mold core, a measuring electrode is slidably clamped on the middle part of each mold core, an electrode seat is fixedly installed on the left and right sides of the inner shell body, a hexagonal nut is threadedly installed in the middle part of each electrode seat, a silicon steel sheet is arranged on the outer side of the inner shell body, the inner wall of the silicon steel sheet is in contact with one side of each product coil and hexagonal nut, the outer wall of the silicon steel sheet is in contact with one side of each No. 1 bolt, and a No. 2 bolt fixed electrode welding piece is threadedly installed on the two sides of each measuring electrode. The gap between the electrode welding piece and the silicon steel sheet ensures the insulation performance of the electrode.

[0006] Two symmetrical circular end plates are slidably clamped on two sides of the mold core, the inner shell is fixedly installed at the middle of the opposite side of the circular end plate, a first O-shaped sealing ring is fixedly installed at the middle of the two circular end plates, the inner wall of the first O-shaped sealing ring is in contact with the mold core, the inner shell is fixedly installed at the middle of the opposite side of the circular end plate, a flange plate is arranged on one side of the two circular end plates, a short connecting pipe is fixedly installed on one side of the two flange plates, a first flange is fixedly installed on the opposite side of the two short connecting pipes, an outer shell is fixedly installed on the opposite side of the two circular end plates, and a catheter assembly is fixedly installed at the top of the outer shell.

[0007] Compared with the prior art, the utility model has the advantages that:

[0008] 1、The application can press the sealing surface on both sides of the end surface of the mold core through the flange cover of the external interface assembly screwed by the third bolt, so that the internal liquid cannot leak and the external liquid cannot enter the body, and the application changes the original lining process mode, discards the high-cost mold extrusion mode, reduces the manufacturing cost and improves the manufacturing efficiency.

[0009] 2、The application can press the magnetic core and the magnetic pole head through the flat head set screw, so that the magnetic pole head extends into the groove of the mold core, the distance between the upper and lower magnetic poles is shortened, and the magnetic field strength is enhanced.

[0010] 3、The application can ensure the insulation index of the measuring electrode through the butterfly-shaped elastic sheet, the insulating gasket and the insulating sleeve, so that the sealing surface of the measuring electrode of the structure is increased. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is a sectional structure schematic diagram of the utility model.

[0014] Figure 3 It is a structural schematic diagram of the utility model after the mold core and the inner shell are split.

[0015] Figure 4 It is a sectional structure schematic diagram of the mold core and the inner shell of the utility model.

[0016] Figure 5 It is the connection structure schematic view of finished coil plate and silicon steel sheet in the utility model.

[0017] Figure 6 It is the cross section structure schematic view of magnetic core in the utility model.

[0018] Figure 7 It is the cross section structure schematic view of measuring electrode in the utility model.

[0019] Figure 8 It is the structure schematic view after flange plate and short connecting pipe are split in the utility model.

[0020] Figure 9 It is the connection structure schematic view of chuck and first flange in the utility model.

[0021] In the drawing: 1, mold core; 11, inner shell; 12, silicon steel sheet; 13, round end plate; 14, first O-shaped sealing ring; 2, finished coil; 21, magnetic core; 22, magnetic pole head; 23, flat head set screw; 24, first bolt; 3, hexagonal nut; 31, electrode seat; 32, measuring electrode; 33, insulating gasket; 34, butterfly spring; 35, insulating sleeve; 36, second bolt; 37, electrode welding piece; 4, first flange; 41, short connecting pipe; 42, flange plate; 43, third bolt; 44, threaded hole; 45, chuck; 5, catheter assembly; 6, outer shell; 61, through hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Embodiment: as Figures 1-9The utility model provides a kind of sensor structure of small-bore electromagnetic flowmeter, including mould core 1, the middle part outer surface of mould core 1 is slidably clamped with inner shell 11, the upper and lower sides of inner shell 11 are equipped with two symmetrical distribution finished coils 2, the middle part of two finished coils 2 is equipped with magnetic core 21, the middle part of two magnetic cores 21 is slidably clamped with magnetic pole head 22, the middle part of two magnetic cores 21 is threadedly installed with flat head set screw 23, one end of two flat head set screws 23 is contacted with one end of magnetic pole head 22, the middle part of the opposite side of two magnetic cores 21 is threadedly installed with one bolt 24, one end of two one bolts 24 is contacted with one end of flat head set screw 23, one end of two magnetic pole heads 22 is slidably clamped in the middle part of mould core 1, the middle part of two mould cores 1 is slidably clamped with measuring electrode 32, the left and right sides of inner shell 11 are fixedly installed with electrode holder 31, the middle part of two electrode holders 31 is threadedly installed with hexagon nut 3, the outside of inner shell 11 is equipped with silicon steel sheet 12, one side of two finished coils 2 and hexagon nut 3 is contacted with the inner wall of silicon steel sheet 12, one side of two one bolts 24 is contacted with the outer wall of silicon steel sheet 12, the left and right sides of two measuring electrodes 32 are threadedly installed with two bolts 36 fixed electrode pad 37.

[0024] The left and right sides of mould core 1 are slidably clamped with two symmetrical distribution round end plates 13, the opposite side middle part of round end plate 13 is fixedly installed at the both ends of inner shell 11, the middle part of two round end plates 13 is fixedly installed with first O-shaped sealing ring 14, the inner wall of first O-shaped sealing ring 14 is contacted with mould core 1, one side of two round end plates 13 is equipped with flange plate 42, one side of two flange plates 42 is fixedly installed with short connecting pipe 41, the opposite side of two short connecting pipes 41 is fixedly installed with one flange 4, the opposite side of two round end plates 13 is fixedly installed with outer shell 6, the top of outer shell 6 is fixedly installed with conduit assembly 5, by setting flange plate 42, wherein flange plate 42 can be used with chuck 45 mutually.

[0025] The middle part of one side of two measuring electrodes 32 is equipped with insulating gasket 33, by setting insulating gasket 33, it is guaranteed that measuring electrode 32 will not be disturbed.

[0026] The opposite side of two insulating gaskets 33 is equipped with butterfly spring 34, the opposite side of two butterfly springs 34 is contacted with one side of hexagon nut 3, by setting butterfly spring 34, so that measuring electrode 32 realizes sealing pre-tightening force.

[0027] The outside of two measuring electrodes 32 is equipped with insulating sleeve 35, the outer wall of two insulating sleeves 35 is contacted with the middle part of hexagon nut 3, by setting insulating sleeve 35, it can be insulated that measuring electrode 32 and hexagon nut 3 are mutually separated.

[0028] The outer side of the silicon steel sheet 12 is provided with an electrode welding sheet 37, and one side of the two second bolts 36 is in contact with one side of the electrode welding sheet 37. The electrode welding sheet 37 is not in contact with the two sides of the silicon steel sheet 12, and the tail end of the measuring electrode 32 is in contact with the second bolt 36 through the electrode welding sheet 37. The measuring electrode 32 is used for welding a lead wire to transmit a signal to the converter.

[0029] A plurality of threaded holes 44 are arranged in the middle of the two flanges 42 and the circular end plate 13, and the middle of the plurality of threaded holes 44 is screwed with a third bolt 43. The third bolt 43 and the threaded hole 44 are arranged to connect the circular end plate 13 and the flange 42.

[0030] A through hole 61 is arranged in the middle of the top end of the shell 6. The through hole 61 can accommodate the electrode signal line and the excitation lead wire of the finished coil 2 to pass through the hole.

[0031] Working principle: In actual use, the magnetic core 21 and the magnetic pole head 22 are pressed tightly by the flat head set screw 23, so that the magnetic pole head 22 extends into the groove of the mold core 1, shortens the distance between the upper and lower magnetic poles, and strengthens the magnetic field intensity. The finished coil 2 is installed on the magnetic core 21, and is wrapped with a circle of silicon steel sheet 12 outside. The finished coil 2 is fixed by the first bolt 24, and the closed magnetic circuit structure is formed.

[0032] The measuring circuit structure is fixed by the electrode holder 31 and the hexagonal nut 3, and is pre-tightened by the butterfly spring 34 to realize the sealing of the electrode. The insulation between the measuring electrode 32, the electrode holder 31 and the hexagonal nut 3 is achieved by the insulating gasket 33 and the insulating sleeve 35, so as to ensure the insulation index of the measuring electrode 32. The tail end of the measuring electrode 32 is designed with a threaded hole, and the second bolt 36 is arranged to fix the electrode welding sheet 37. The induced electromotive force is led out by welding a lead wire.

[0033] In the installation, the two circular end plates 13 are welded and spliced by two semicircular circular end plates 13, and the two ends of the inner shell 11 are welded and installed on the opposite sides of the circular end plate 13. The outer shell 6 is welded between the two circular end plates 13, so that the two circular end plates 13 are in a sealed state. The flange 42 and the circular end plate 13 are connected by the third bolt 43, and the short connecting pipe 41 is connected between the flange 42 and the first flange 4 by welding. The pipe assembly 5 is fixed and installed above the outer shell 6 by welding, and is used for connecting the sensor and the converter.

[0034] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Therefore, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technology, the present application also intends to include these modifications and variations.

Claims

1. A sensor structure for a small-bore electromagnetic flowmeter comprising a die core (1), characterised in that: The middle outer surface of the mold core (1) is slidably clamped with an inner shell (11), the upper and lower sides of the inner shell (11) are each provided with two symmetrical finished coils (2), the middle part of the two finished coils (2) is provided with a magnetic core (21), the middle part of the two magnetic cores (21) is slidably clamped with a magnetic pole head (22), the middle part of the two magnetic cores (21) is threadedly installed with a flat head set screw (23), one end of the two flat head set screws (23) is in contact with one end of the magnetic pole head (22), the middle part of the two magnetic cores (21) is threadedly installed with a No. One bolt (24), one end of the two No. One bolt (24) is in contact with one end of the flat head set screw (23), one end of the two magnetic pole heads (22) is slidably clamped in the middle part of the mold core (1), the middle part of the two mold cores (1) is slidably clamped with a measuring electrode (32), the left and right sides of the inner shell (11) are fixedly installed with an electrode holder (31), the middle part of the two electrode holders (31) is threadedly installed with a hexagon nut (3), the outer side of the inner shell (11) is provided with a silicon steel sheet (12), one side of the two finished coils (2) and the hexagon nut (3) is in contact with the inner wall of the silicon steel sheet (12), one side of the two No. One bolt (24) is in contact with the outer wall of the silicon steel sheet (12), the two sides of the two measuring electrodes (32) are threadedly installed with a No. Two bolt (36) fixed electrode welding piece (37), and the electrode welding piece (37) and the silicon steel sheet (12) maintain a gap to ensure the insulation performance of the electrode.

2. A sensor structure for a small-bore electromagnetic flowmeter as defined in claim 1, characterized in that The two sides of the mold core (1) are slidably clamped with two symmetrical circular end plates (13), the two ends of the inner shell (11) are fixedly installed in the middle part of the opposite sides of the circular end plate (13), the middle part of the two circular end plates (13) is fixedly installed with a first O-shaped sealing ring (14), the inner wall of the first O-shaped sealing ring (14) is in contact with the mold core (1), one side of the two circular end plates (13) is provided with a flange plate (42), one side of the two flange plates (42) is fixedly installed with a short connecting pipe (41), the opposite sides of the two short connecting pipes (41) are fixedly installed with a No. One flange (4), the opposite sides of the two circular end plates (13) are fixedly installed with an outer shell (6), and the top end of the outer shell (6) is fixedly installed with a pipe assembly (5).

3. A sensor structure for a small-bore electromagnetic flowmeter as defined in claim 1, wherein The middle part of one side of the two measuring electrodes (32) is provided with an insulating gasket (33).

4. A sensor structure for a small-bore electromagnetic flowmeter as defined in claim 3, wherein The opposite sides of the two insulating gaskets (33) are provided with butterfly-shaped elastic pieces (34), and the opposite sides of the two butterfly-shaped elastic pieces (34) are in contact with one side of the hexagon nut (3).

5. A sensor structure for a small-bore electromagnetic flowmeter as defined in claim 1, wherein, The outer side of the two measuring electrodes (32) is provided with an insulating sleeve (35), and the outer wall of the two insulating sleeves (35) is in contact with the middle part of the hexagon nut (3).

6. A sensor structure for a small-bore electromagnetic flowmeter as defined in claim 1, wherein, The outer side of the silicon steel sheet (12) is provided with an electrode welding piece (37), and one side of the two No. Two bolts (36) is in contact with one side of the electrode welding piece (37).

7. A sensor structure for a small-bore electromagnetic flowmeter as defined in claim 2, wherein Two flanges (42) and the middle part of the circular end plate (13) are provided with a plurality of threaded holes (44) matched with each other, and the middle part of the plurality of threaded holes (44) is threadedly installed with a third bolt (43).

8. A sensor structure for a small-bore electromagnetic flowmeter as defined in claim 2, wherein, The top middle part of the shell (6) is provided with a through hole (61).

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