Double-clip type thermal gas mass flow meter

Abstract

The utility model relates to a wafer type thermal gas mass flow meter, which comprises a meter head, a meter rod and a meter body, the meter head is connected to the upper end of the meter rod, the meter body is connected to the lower end of the meter rod, the meter body comprises a pipe body, two independent flanges and a plurality of connecting screw rods, the two flanges are respectively positioned at two ends of the pipe body, and the connecting screw rods are respectively positioned at two ends of the pipe body. Gaskets are arranged between the flanges and the ends of the pipe body, and the connecting screw penetrates through corresponding flange holes of the two flanges. An original integrated meter body is changed into a split type meter body, compared with an integrated stainless steel meter body, cost can be saved in the aspects of raw materials and the manufacturing process, and the split type structure also has the advantage of being convenient to install.

Description

TECHNICAL FIELD

[0001] The utility model relates to flowmeter technical field, concretely relates to a pair of clamping type hot gas mass flowmeter. BACKGROUND

[0002] The hot gas mass flowmeter is an instrument for measuring gas flow by using thermal diffusion principle. The sensor is composed of two reference level resistance temperature detectors (RTD). One is a velocity sensor RH, and the other is a temperature sensor RMG for measuring the temperature change of the gas. When the two RTDs are placed in the measured gas, the sensor RH is heated, and the other sensor RMG is used to sense the temperature of the measured gas. With the increase of the gas flow rate, the gas flow carries away more heat, and the temperature of the sensor RH decreases. The hot gas mass flowmeter is mainly divided into plug-in type and pipe segment type according to the installation mode. The pipe segment type is integrated with the flanges at both ends, and the manufacturing process is complex, such as welding the flange plate first and then processing, which requires high processing precision. SUMMARY

[0003] The utility model discloses a pair of clamping type hot gas mass flowmeter, relative to pipe segment type hot gas mass flowmeter, reduce the manufacturing cost.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A pair of clamping type hot gas mass flowmeter, including the meter head, the meter rod, the meter body, the meter head is connected to the upper end of the meter rod, the meter body is connected to the lower end of the meter rod, the meter body includes the pipe body, two independent flanges and a plurality of connecting screws, two flanges are located at both ends of the pipe body, and a gasket is arranged between the flange and the end of the pipe body, and the connecting screw passes through the corresponding flange hole of the two flanges.

[0006] Further, one end face of the flange is concave with an annular mounting groove for placing the gasket.

[0007] Further, the gasket is a flexible gasket wound by a sheet.

[0008] Further, the bottom surface of the annular mounting groove is provided with a sealing groove.

[0009] Further, the both ends of the pipe body are provided with sealing grooves.

[0010] Further, the sealing groove comprises a plurality of concentric circles.

[0011] Further, both ends of the connecting screw are provided with nuts for clamping the two flanges at both ends of the pipe body.

[0012] The utility model has the advantages of:

[0013] The utility model discloses a pair of clamping hot type gas mass flowmeter, the integral type meter body of original is changed into split type, and the pipe body part of meter body adopts stainless steel to make, and two independent flanges can adopt ordinary carbon steel to make, compared with integral type stainless steel meter body, can save cost in raw material aspect;The form of split, the manufacturing technology of meter body is relatively simple, also can save manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the perspective view of the pair of clamping hot type gas mass flowmeter of the utility model;

[0015] Fig. 2 It is the explosion schematic view of the pair of clamping hot type gas mass flowmeter of the utility model;

[0016] Fig. 3 It is partial structure diagram in the pair of clamping hot type gas mass flowmeter of the utility model.

[0017] 1, meter head;11, display screen;12, wiring hole;2, meter rod;3, flange;31, annular mounting groove;32, through hole;4, pipe body;41, display screen;5, connecting screw;51, circular ring;6, gasket;7, thermal resistance. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art belong to the protection scope of the utility model.

[0019] Embodiments of the utility model:

[0020] As Figs. 1-3 Indicated, a pair of clamping hot type gas mass flowmeter, including meter head 1, meter rod 2, meter body, and meter head 1 is connected to the upper end of meter rod 2, and meter body is connected to the lower end of meter rod 2. One side of meter head 1 is equipped with display screen 11, and it is convenient to read data on site;Meter head 1 is also equipped with wiring hole 12, for connecting remote data line, and the detection data is remotely transmitted;The through hole 32 of meter body is equipped with thermal resistance 7, and is connected with the data processing module in meter head 1.

[0021] Meter head 1, meter rod 2 are the structure in prior art, and will not be repeated here;The improvement of the utility model is in meter body part, and the original integral type is changed into split type.

[0022] The table body comprises a pipe body 4, two independent flanges 3 and a plurality of connecting screws 5, the two flanges 3 are respectively located at two ends of the pipe body 4, and a gasket 6 is arranged between the flange 3 and the end of the pipe body 4. An annular mounting groove 31 is concave in one end surface of the flange 3, and is used for placing the gasket 6. The flange 3 and the gasket 6 both have through holes 32 corresponding to the inner hole of the pipe body 4, and are used for passing the fluid to be measured.

[0023] In use, the connecting screws 5 pass through the corresponding flange holes of the two flanges 3, and four connecting screws 5 are arranged in the embodiment. Nut is arranged at both ends of the connecting screw 5, and is used for clamping the two flanges 3 at both ends of the pipe body 4.

[0024] The gasket 6 is not an integral structure, but a flexible gasket wound by a sheet. The thin steel sheet is wound in a circle, and is tightly wound, and finally the end is welded and fixed. After the gasket 6 is subjected to axial force, the thin steel sheets of different circles can have a small amount of relative displacement in the axial direction, so that the gasket 6 can better fit the bottom surface of the annular mounting groove 31, and sealing cooperation is realized.

[0025] Further, a layer of graphene is coated on the surface of the thin steel sheet during the winding process of the gasket 6, so as to improve the sealing effect and the high temperature resistance.

[0026] The pipe body 4 is provided with a sealing groove at both ends, and the sealing groove comprises a plurality of concentric annular rings 51, the annular ring 51 is relatively shallow, about 1mm, and can be used for filling graphene to further improve the sealing performance. Similarly, the bottom surface of the annular mounting groove 31 is also provided with a sealing groove.

[0027] The pipe body 4 of the table body is made of stainless steel, and the two independent flanges 3 can be made of ordinary carbon steel. Compared with the integral stainless steel table body, the cost of raw materials can be saved; the split form is relatively simple in manufacturing process, and the manufacturing cost can also be saved. Under the premise of meeting the detection performance requirements of the flowmeter, the cost is reduced, so as to meet the users who pursue good quality and low price.

[0028] The utility model discloses a pair of clamping type hot gas mass flowmeter, when installing and using, the flange 3 of both sides is welded fixed with the one end of pipeline, then utilizes screw and clamps the flange 3, gasket 6 in the both sides of pipe body 4. Not only is applicable to the installation of new pipeline, also is applicable to the transformation such as replacement old flowmeter of old pipeline, also can replace only the intermediate main part except the flange 3. A group of screw is used to realize the clamping installation, and the installation is convenient.

Claims

1. A clamp-on thermal gas mass flow meter comprising a meter head, a meter stem, a meter body, the meter head connected to an upper end of the meter stem, the meter body connected to a lower end of the meter stem, characterized in that: The table body comprises a pipe body, two independent flanges and a plurality of connecting screws, the two flanges are respectively located at two ends of the pipe body, a gasket is arranged between the flange and the end of the pipe body, and the connecting screws pass through corresponding flange holes of the two flanges.

2. The dual-element thermal gas mass flow meter of claim 1, wherein: An annular mounting groove is concave in an end face of the flange, and is used for placing the gasket.

3. A dual-element thermal gas mass flow meter as set forth in either of claims 1 or 2, further characterized by: The gasket is a flexible gasket formed by winding a sheet.

4. The dual-element thermal gas mass flow meter of claim 2, wherein: A bottom surface of the annular mounting groove is provided with a sealing groove.

5. The dual-element thermal gas mass flow meter of claim 1, wherein: Sealing grooves are arranged at two ends of the pipe body.

6. The dual-element thermal gas mass flow meter of claim 5, wherein: The sealing groove comprises a plurality of concentric circles.

7. The dual-element thermal gas mass flow meter of claim 1, wherein: Nuts are arranged at two ends of the connecting screw, and are used for clamping the two flanges at two ends of the pipe body.

Images