CN209727178U - A reduced-diameter electromagnetic water meter - Google Patents

Abstract

The utility model discloses a kind of undergauge type electromagnetism water meters, including housing unit, shell, terminal pad, gauge outfit component, magnet exciting coil, housing unit be fixedly connected with shell, gauge outfit component be fixed on above terminal pad, terminal pad be fixed on above shell, housing unit include lining, adapter flange, side plate, measurement pipe, stud, measuring electrode, grounding electrode, lining is bonded adapter flange inner hole and measurement inside pipe wall, lining inner hole forms medium channel, adapter flange includes flange section, reducer, measuring electrode it is at least a pair of, it is distributed horizontally on the symmetrical outer wall in measurement pipe middle, and run through measurement pipe and lining, electromagnetism water meter involved in the utility model can measure flow velocity more lower than through-type electromagnetism water meter, to increase the range ability that can be measured, structure is simple, processing and assembling are all very convenient , while using multiple electrode structure, while guaranteeing suitable zero potential, the occurrence of capable of effectively preventing blank pipe.

Description

A reduced-diameter electromagnetic water meter

technical field

The utility model relates to the field of electromagnetic water meters, in particular to a diameter-reducing electromagnetic water meter.

Background technique

There are two commonly used structures in the technical scheme of the existing electromagnetic water meter: the through-diameter type, which adopts the same diameter size for the entire measurement section, and the size of the circular pipe at the inlet and outlet and the middle position is the same. The reduced-diameter type has a larger entrance and a smaller middle. For the straight-through electromagnetic water meter, since the lower limit flow rate detected by the electromagnetic water meter is related to the flow rate, the fixed pipe diameter corresponds to the fixed flow rate, so the detectable flow rate is fixed with the caliber, and the detectable lower limit flow rate is determined. The flow range is also determined, so for some small flow occasions, it is not suitable for straight-through electromagnetic water meters. For the reduced-diameter electromagnetic water meter, there are currently media channels with a square cross-section. For example, the Chinese patent application number 201721881734.0 discloses a new type of reduced-diameter electromagnetic flowmeter. The middle cross-section of this electromagnetic flowmeter is square, which limits the flow of the medium. The circulation in the medium channel increases the pressure loss, which is not conducive to practical use. At the same time, in some occasions, it is necessary to detect the pressure of the measured medium in real time. Since the inner wall of the electromagnetic water meter has a lining structure, it also increases the difficulty of setting the pressure structure.

Utility model content

The purpose of the utility model is to provide a simple structure, convenient and practical shrinking type electromagnetic water meter.

The purpose of the invention of the utility model is achieved through the following technical solutions:

A reduced-diameter electromagnetic water meter, comprising a housing assembly, a casing, a connection plate, a meter head assembly, and an excitation coil, the casing assembly and the casing are fixedly connected, the meter head assembly is fixed above the connection disk, and the The connecting plate is fixed above the shell, and the housing assembly includes a liner, a variable diameter flange, a side plate, a measuring tube, a stud, a measuring electrode, and a grounding electrode. The lining fits the inner hole of the variable diameter flange and the measuring The inner wall of the pipe, the inner hole of the lining forms a medium channel, the variable diameter flange includes a flange section and a variable diameter section, and there are at least one pair of measuring electrodes, which are horizontally distributed on the symmetrical outer wall in the middle of the measuring tube and run through the measuring tube and the lining, the end face of the variable diameter flange and the end face of the measuring tube are fixedly connected, the side plate can be inserted from the end face of the measuring tube, and is fixedly connected with the outer wall of the measuring tube, and the excitation coil is fixed on the measuring tube through studs. on the outer wall of the tube.

After adopting the above-mentioned technical scheme, it is possible to realize a measurement medium channel with large two ends and a small middle, so that the flow velocity can be increased in the middle part, the output signal of the measurement electrode can be enhanced, and the output signal that can be measured can be achieved, thereby increasing the measurement range and expanding the range At the same time, by reasonably setting the taper of the reducing section of the reducing flange, the pressure loss of the pipeline can be controlled within a reasonable range. The overall interface of the reduced-diameter pipe is circular, which can avoid excessive pressure loss to the medium.

Further settings: the inner hole of the other end face of the variable diameter flange away from the variable diameter section is provided with a small straight pipe section, and a pressure tapping hole can be set on the straight pipe section, which can be processed and set in the environment where pressure tapping is required. Here, an interface can be provided for the place where pressure detection is required. The straight pipe section is conducive to the sealing setting at the pressure interface. If the pressure is taken at the reduced diameter section, it is not conducive to the sealing setting of the pressure taking structure.

Further settings: the number of grounding electrodes is 1, which is arranged on the outer wall of the middle bottom of the measuring tube, and runs through the measuring tube and the lining; the number of grounding electrodes can also be 2, which are vertically arranged on the symmetrical outer wall in the middle of the measuring tube, and Through gauge tube and liner.

The zero potential reference point can be set for the measurement signal through the setting of the grounding electrode, saving the setting of other grounding methods, and the setting of the other two grounding electrodes can provide a more accurate judgment signal for the empty pipe alarm.

A further setting: a split junction box can be used instead of the meter assembly to be fixed on the connection plate, and the meter assembly is electrically connected to the split junction box, and is used in a place where the meter assembly is installed in a split form.

This setting is used when the environment is harsh, and the meter head assembly is not suitable for installation on site, or the head of the meter group needs to be set in a place where the operator can view it, so as to avoid being affected by the harsh environment, and it is also beneficial for the operator to use.

In summary, the utility model has the following beneficial effects:

The electromagnetic water meter involved in the utility model can measure a flow rate lower than that of the through-type electromagnetic water meter, thereby increasing the measurable range range, simple structure, convenient processing and assembly, and adopting a multi-electrode structure at the same time to ensure a suitable zero potential At the same time, it can effectively prevent the occurrence of empty traffic situations.

Description of drawings

Fig. 1 is the overall structural diagram of the utility model;

Fig. 2 is a structural diagram of the split junction box of the present invention;

Fig. 3 is a structural diagram of the housing assembly of the utility model;

Fig. 4 is a longitudinal sectional view of the housing assembly of the utility model;

Fig. 5 is the structural diagram of the reducing flange of the utility model.

Reference signs: 1. Shell assembly; 2. Shell; 3. Connecting plate; 4. Meter assembly; 5. Exciting coil; 6. Split junction box; 11. Lining; 12. Reducing flange; 13. Pressure hole; 14, side plate; 15, measuring tube; 16, stud; 17, measuring electrode; 18, grounding electrode; 19, medium channel; 121, flange section; 122, variable diameter section; 123, straight pipe section .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution according to needs after reading this specification, but as long as they are within the utility model All new claims are protected by patent law.

Referring to Figures 1 to 5, in the embodiment of the present utility model, a reduced-diameter electromagnetic water meter includes a housing assembly 1, a housing 2, a connection plate 3, a gauge assembly 4, and an excitation coil 5. The housing The body assembly 1 is fixedly connected to the shell 2, the meter head assembly 4 is fixed above the connecting plate 3, and the connecting plate 3 is fixed above the shell 2, and the feature is that the shell assembly 1 includes a lining 11, Reduced diameter flange 12, side plate 14, measuring tube 15, stud 16, measuring electrode 17, grounding electrode 18, the lining 11 fits the inner hole of the reducing flange 12 and the inner wall of the measuring tube 15, and the inner hole of the lining 11 is formed The medium channel 19, the reducing flange 12 includes a flange section 121 and a reducing section 122, and the measuring electrodes 17 have at least one pair, which are horizontally distributed on the symmetrical outer wall in the middle of the measuring tube 15 and run through the measuring tube 15 and the lining 11, the end surface of the variable diameter flange 12 and the end surface of the variable diameter section 122 are fixedly connected to the end surface of the measuring tube 15, the side plate 14 can be inserted from the position of the end surface of the measuring tube 15, and is fixedly connected to the outer wall of the measuring tube 15, the excitation The coil 5 is fixed on the outer wall of the measuring tube 15 through a stud 16 .

A small section of straight pipe section 123 is provided on the inner hole of the other end surface of the reducing flange 12 away from the reducing section 122, and a pressure-taking hole 13 can be arranged on the straight pipe section 123, which can be processed and set in an environment where pressure-taking is required.

The number of the ground electrode 18 can be one, which is arranged on the outer wall of the middle bottom of the measuring tube 15 and runs through the measuring tube 15 and the liner 11 . There may also be two, vertically arranged on the symmetrical outer wall in the middle of the measuring tube 15, and passing through the measuring tube 15 and the liner 11.

Moreover, the split junction box 6 can be used instead of the meter assembly 4 to be fixed on the connection plate 3, and the meter assembly 4 is electrically connected to the split junction box 6, and is used for the place where the meter assembly 4 is installed in a split form.

Claims (5)

1. a kind of undergauge type electromagnetism water meter, including housing unit (1), shell (2), terminal pad (3), gauge outfit component (4), excitation wire It encloses (5), the housing unit (1) is fixedly connected with shell (2), and the gauge outfit component (4) is fixed on terminal pad (3) Side, the terminal pad (3) are fixed on above shell (2), it is characterized in that: the housing unit (1) includes lining (11), becomes Diameter flange (12), side plate (14), measurement pipe (15), stud (16), measuring electrode (17), grounding electrode (18), the lining (11) it is bonded adapter flange (12) inner hole and measurement pipe (15) inner wall, lining (11) inner hole forms medium channel (19), the change Diameter flange (12) includes flange section (121), reducer (122), and the measuring electrode (17) is at least a pair of, is distributed horizontally to On the symmetrical outer wall in measurement pipe (15) middle, and run through measurement pipe (15) and lining (11), the adapter flange (12) becomes Diameter section (122) end face is fixedly connected with measurement pipe (15) end face, and side plate (14) can be inserted in from measurement pipe (15) endface position, and with Measurement pipe (15) outer wall is fixedly connected, and the magnet exciting coil (5) is fixed on measurement pipe (15) outer wall by stud (16).

2. undergauge type electromagnetism water meter according to claim 1, it is characterized in that: the adapter flange (12) is far from reducer (122) other end inner hole is provided with a bit of straight pipe (123), and pressure port can be set on the straight pipe (123) (13), processing sets up in the environment of needing pressure.

3. undergauge type electromagnetism water meter according to claim 1 or 2, it is characterized in that: grounding electrode (18) quantity is 1 It is a, it is arranged on measurement pipe (15) central bottom outer wall, and run through measurement pipe (15) and lining (11).

4. undergauge type electromagnetism water meter according to claim 1 or 2, it is characterized in that: described grounding electrode (18) quantity is 2 It is a, it is vertically arranged on the symmetrical outer wall in measurement pipe (15) middle, and run through measurement pipe (15) and lining (11).

5. undergauge type electromagnetism water meter according to claim 1, it is characterized in that: gauge outfit can be replaced with Split type connecting box (6) Component (4) is fixed on terminal pad (3), is electrically connected between the gauge outfit component (4) and Split type connecting box (6), for dividing Body formula installs the place of gauge outfit component (4).