JPH02280014A - Positive displacement flow rate measuring instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a volumetric flow rate measuring device, and more particularly to a volumetric flow rate measuring device that is easy to assemble.

(Prior art) Positive displacement flowmeters that measure the flow rate based on rotor rotation need to correct errors due to thermal expansion of the fluid. It is configured to correct the flow rate by inputting detected fluid temperature data into a temperature correction circuit built into the meter body. For this reason, when installing this type of flow I measurement device, it requires laborious work such as installing the temperature sensor in the pipeline, wiring work between the temperature sensor and the flowmeter body, and requires long-term work. Depending on the use of the lead wire, the lead wire may corrode or break.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a new volumetric flow rate measuring bag that is easy to install and has no risk of disconnection. The goal is to provide M.

(Means for Solving the Problems) In other words, the present invention provides a volumetric flow rate measurement snowmaker for achieving the above problems, in which the output shaft of the rotor is protruded from the top surface, and a temperature sensor insertion hole is provided in a part of the top surface. An electrical device comprising a rotor storage casing that forms part of a fluid flow path, a temperature correction circuit, a rotary electromechanical conversion means, and a temperature sensor inside, and an input shaft of the electromechanical conversion means and a temperature sensor protruding from the bottom surface. By assembling the electrical equipment housing on the rotor housing casing, the temperature sensor is inserted into the temperature sensor insertion hole and the input shaft end is coupled to the output shaft end.

(Example) Therefore, the illustrated embodiment will be explained below.

In the rotor housing casing indicated by reference numeral 1 in the figure,
A rotor press plate 4 is integrally attached with a port 6 so as to cover the upper opening of the rotor storage chamber 2. This rotor holding plate 4 is provided with an insertion hole 5 for inserting a temperature sensor 18 into the inflow side portion of the casing 1, and also has an insertion hole 5 for inserting a temperature sensor 18 into the inlet side portion of the casing 1. The rotor shaft projects as an output shaft 8 onto the presser plate 4, and is connected to an input shaft 16 of a rotor encoder via an annular permanent magnet 10 to which a bracket 9 is fixed to the shaft end. It is configured.

On the other hand, electrical equipment storage is installed directly above the rotor storage chamber 2 mentioned above! Reference numeral 112 is configured as a unit that houses a rotary encoder 15 as a rotary electromechanical conversion means, a temperature sensor 18 that detects the temperature of the fluid, a temperature correction circuit, a pulse generation circuit, and the like. A cover 14 made of a non-magnetic material is integrally and airtightly attached to the bottom plate 13 of the electrical equipment storage case 12 and penetrates into the annular magnet 1° of the rotor output shaft 8:js. The input shaft 16 of the rotary encoder 15 extending downward is protected by the cover 14, and the permanent magnet 17 fixed to the end of the shaft 16 is magnetically coupled to the annular magnet 10 at the end of the rotor output shaft 8. It is configured as a so-called magnetic joint.

On the other hand, the above-mentioned temperature sensor 18 is attached to the air so as to protrude below the portion of the storage casing bottom plate 13 corresponding to the insertion hole 5 on the rotor holding plate 4, and the storage casing 12 is attached to the rotor storage casing. When installed on 1, presser plate 4
It is configured to pass through the upper insertion hole 5 and the insertion hole 3 on the casing 1 and protrude into the pipe line.

In the figure, reference numeral 19 indicates a liquid crystal flow rate indicator provided on the upper surface of the electrical equipment storage case 12, and 20 indicates a glass covering the top.

The device configured in this way first includes a temperature sensor 18.
Insert the tip of the housing into the insertion hole 5 on the rotor holding plate 4 to position the electrical equipment storage value 12, and then lower the storage case] 2 onto the rotor holding plate 4 as it is, thereby inserting the input shaft 16 of the rotary encoder 15. non-magnetic cover 14 covering
penetrates into the annular magnet 10 at the end of the rotor output shaft 8 and magnetically couples both shafts 8.16, and at the same time
is placed on the rotor housing casing 1.

Therefore, in this state, the storage case 128 is opened by Porto 22.
Once it is connected onto the casing 1, all assembly lFr can be completed. In this state, a part of the fluid flowing inside the pipe flows into between the casing 1 and the storage case 12 through the gap between the temperature sensor 18 and the insertion hole 3.5, but it is airtightly protected by the non-magnetic cover 14. Intrusion of fluid into the storage case] 2 is prevented.

(Effects) As described above, according to the present invention, the rotor output shaft protrudes from the upper surface of the row or storage casing, and a temperature sensor insertion hole is provided in a part of the upper surface, while the rotary By protruding the input shaft and temperature sensor of the electromechanical conversion means and assembling the electrical equipment storage value on the rotor storage casing, the temperature sensor is inserted into the temperature sensor insertion hole, and the input shaft end is coupled to the output shaft end. This makes it extremely easy to assemble this type of temperature-compensated flow rate measuring snowmaking machine, and also eliminates lead wire corrosion, cutting, etc., greatly improving the reliability of the device. .

[Brief explanation of drawings]

FIG. 1 is a sectional view of a device showing an embodiment of the present invention, and FIG. 2 is a plan view of the device with the electrical equipment storage case removed. 1...Rotor storage casing 3.5...Temperature sensor insertion hole 4...Rotor press plate 8...Rotor output shaft 10...Annular magnet 12...Electrical equipment Storage case 15...Rotary encoder 16...Input shaft 17...Magnet 18...Temperature sensor

Claims (1)

[Scope of Claims] A rotor housing casing constituting a part of a fluid flow path with a rotor output shaft protruding from the top surface and a temperature sensor insertion hole provided in a part of the top surface, a temperature compensation circuit inside, and a rotary type. an electrical equipment storage case comprising a mechanical/electrical conversion means and a temperature sensor, and from which the input shaft of the mechanical/electrical conversion means and the temperature sensor protrude from the bottom surface, and the electrical equipment storage case is assembled on the rotor storage casing. A volumetric flow rate measuring device characterized in that the temperature sensor is inserted into the temperature sensor insertion hole and the input shaft end is coupled to the output shaft end.