A pipe thermal gas flowmeter

Abstract

This utility model belongs to the field of flow meter technology, specifically a pipeline-type thermal gas flow meter, installed on an installation pipeline. It includes: a measuring mechanism installed on the installation pipeline, a protective gasket mechanism disposed between the installation pipeline and the measuring mechanism, and a shock-absorbing mechanism disposed outside the protective gasket mechanism. The protective gasket mechanism includes a stainless steel support layer supporting the installation pipeline, a buffer layer attached to the stainless steel support layer, a sealing layer covering the buffer layer, and a heat dissipation layer connected to the outside of the sealing layer. Compared with traditional gaskets, this protective gasket mechanism has strong support, high corrosion resistance, good sealing effect, and a certain degree of elastic buffering effect. It can also accelerate the dissipation of heat generated during the operation of the measuring mechanism, resulting in a longer overall service life and effectively ensuring the safety of the measuring mechanism.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, specifically a pipeline-type thermal gas flow meter. Background Technology

[0002] Thermal mass flow meters are flow meters that measure fluid mass flow by utilizing the temperature field changes generated when a fluid flows through a pipe heated by an external heat source, or by utilizing the relationship between the energy required for the fluid temperature to rise to a certain value when heating the fluid and the fluid mass. This enables high-precision measurement of gas mass flow.

[0003] Existing pipeline thermal gas flow meters require gaskets for protection and sealing during installation. However, the performance of conventional gaskets gradually declines after prolonged use, affecting normal operation and causing significant transmission of pipeline vibrations to the flow meter, thus compromising safety. Therefore, we propose a pipeline thermal gas flow meter. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A pipeline-type thermal gas flow meter, installed on an installation pipeline, includes: a measuring mechanism installed on the installation pipeline, a protective mechanism disposed between the installation pipeline and the measuring mechanism, and a shock-absorbing mechanism disposed outside the protective mechanism; the protective mechanism includes a stainless steel support layer on the installation pipeline, a buffer layer attached to the stainless steel support layer, a sealing layer covering the buffer layer, and a heat dissipation layer connected to the outside of the sealing layer.

[0007] In a preferred embodiment, the present invention can be further configured such that: the measuring mechanism includes a housing mounted on the mounting pipe, a sensor substrate disposed within the housing, a silicon nitride thin film fixed to the inner side of the sensor substrate, a heating resistor disposed within the silicon nitride thin film, temperature measuring resistors distributed on both sides of the heating resistor, and an instrument mounted on the housing.

[0008] In a preferred embodiment, the present invention can be further configured such that the shock absorption mechanism includes a heat dissipation sleeve disposed on the outer layer of the buffer layer and located on the side of the sealing layer, and a spring disposed inside the heat dissipation sleeve.

[0009] In a preferred embodiment, the present invention can be further configured such that a heat dissipation vent is provided at the bottom of the housing above the heat dissipation layer.

[0010] In a preferred embodiment, the present invention can be further configured such that the buffer layer is a fluororubber structure with a thickness of 0.5-2 mm.

[0011] In a preferred embodiment, the present invention can be further configured such that the sealing layer adopts a flexible graphite sheet structure.

[0012] In a preferred embodiment, the present invention can be further configured such that the heat dissipation layer is a composite structure of graphene and carbon fiber, wherein the mass percentage of graphene is 10%-30% and the carbon fiber is distributed in a mesh pattern.

[0013] In a preferred embodiment, the present invention can be further configured such that the heat dissipation sleeve is a honeycomb silicone rubber structure.

[0014] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0015] 1. This utility model, compared with traditional gaskets, has strong support, high corrosion resistance, good sealing effect, and a certain elastic buffering effect. At the same time, it can accelerate the dissipation of heat generated during the operation of the measuring mechanism, and has a longer overall service life, which can effectively ensure the safety of the measuring mechanism.

[0016] 2. This utility model can effectively dampen the shell by using a heat dissipation sleeve and a spring. At the same time, the honeycomb design of the heat dissipation sleeve can further improve the heat dissipation effect, making it highly practical. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the pipeline-type thermal gas flow meter of this utility model;

[0018] Figure 2 This is an enlarged view of section A of the pipeline-type thermal gas flow meter of this utility model;

[0019] Figure 3 This is a schematic diagram of the heat dissipation port structure of this utility model.

[0020] Figure label:

[0021] 100. Install pipes;

[0022] 210. Stainless steel support layer; 220. Buffer layer; 230. Sealing layer; 240. Heat dissipation layer;

[0023] 310. Housing; 320. Sensor substrate; 330. Silicon nitride thin film; 340. Heating resistor; 350. Temperature sensing resistor; 360. Instrument; 370. Heat dissipation sleeve; 380. Spring; 390. Heat dissipation port. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0025] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0026] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a pipeline-type thermal gas flow meter.

[0027] Combination Figure 1-3 As shown, this utility model provides a pipeline-type thermal gas flow meter, installed on an installation pipeline 100, including: a measuring mechanism installed on the installation pipeline 100, a protective pad mechanism disposed between the installation pipeline 100 and the measuring mechanism, and a shock-absorbing mechanism disposed outside the protective pad mechanism; the protective pad mechanism includes a stainless steel support layer 210 supporting the installation pipeline 100, a buffer layer 220 attached to the stainless steel support layer 210, a sealing layer 230 covering the buffer layer 220, and a heat dissipation layer 240 connected to the outside of the sealing layer 230. Compared with traditional gaskets, this protective pad mechanism has strong support, high corrosion resistance, good sealing effect, and a certain elastic buffering effect. At the same time, it can accelerate the dissipation of heat generated during the operation of the measuring mechanism, has a longer overall service life, and can effectively ensure the safety of the measuring mechanism.

[0028] Furthermore, the measuring mechanism includes a housing 310 mounted on the mounting pipe 100, a sensor substrate 320 disposed within the housing 310, a silicon nitride thin film 330 fixed inside the sensor substrate 320, a heating resistor 340 disposed within the silicon nitride thin film 330, temperature measuring resistors 350 distributed on both sides of the heating resistor 340, and an instrument 360 mounted on the housing 310. The heating resistor 340 releases heat during operation, the temperature measuring resistors 350 detect the heat on both sides of the heating resistor 340, and the flowing medium carries away the heat generated by the heating resistor 340, thereby realizing the measurement of flow rate.

[0029] Specifically, the shock absorption mechanism includes a heat dissipation sleeve 370 disposed on the outer layer of the buffer layer 220 and located on the side of the sealing layer 230, and a spring 380 disposed inside the heat dissipation sleeve 370. The heat dissipation sleeve 370 and the spring 380 can play a good shock absorption role for the housing 310. At the same time, the honeycomb design of the heat dissipation sleeve 370 can further improve the heat dissipation effect and has high practicality.

[0030] Furthermore, the bottom of the housing 310 is provided with a heat dissipation port 390 located above the heat dissipation layer 240. Through the heat dissipation port 390, the heat transferred from below the heat dissipation layer 240 can flow to the heat dissipation sleeve 370 and be discharged outward, which is highly practical.

[0031] Preferably, the buffer layer 220 is made of fluororubber with a thickness of 0.5-2mm. The fluororubber structure has a certain elastic buffering effect, thereby reducing the impact of pipeline vibration on the stainless steel support layer 210.

[0032] Preferably, the sealing layer 230 adopts a flexible graphite plate structure, which has good corrosion resistance and sealing performance.

[0033] Preferably, the heat dissipation layer 240 is a graphene and carbon fiber composite structure, wherein the graphene accounts for 10%-30% of the mass, and the carbon fiber is distributed in a mesh, resulting in better heat dissipation.

[0034] Furthermore, the heat dissipation sleeve 370 has a honeycomb silicone rubber structure, which can achieve a good heat dissipation effect, and together with the spring 380, it has a certain shock absorption effect.

[0035] The working principle and usage process of this utility model are as follows: First, press the bottom of the housing 310, which is fixed by the heat dissipation sleeve 370 and the spring 380. Then, place the composite gasket composed of the stainless steel support layer 210, the buffer layer 220, the sealing layer 230 and the heat dissipation layer 240 under the stainless steel support layer 210, so that the heat dissipation sleeve 370 is located on the side of the sealing layer 230 and the heat dissipation layer 240. Finally, bolt the housing 310 onto the installation pipe 100. During the installation process, appropriately compress the spring 380 and the composite gasket until the housing 310 is stably installed on the installation pipe 100.

[0036] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pipeline-type thermal gas flow meter, installed in an installation pipeline (100), characterized in that, include: A measuring mechanism installed on the installation pipe (100), a padding mechanism disposed between the installation pipe (100) and the measuring mechanism, and a shock-absorbing mechanism disposed outside the padding mechanism; The padding mechanism includes a stainless steel support layer (210) padding the installation pipe (100), a buffer layer (220) attached to the stainless steel support layer (210), a sealing layer (230) covering the buffer layer (220), and a heat dissipation layer (240) connected to the outside of the sealing layer (230).

2. The pipeline-type thermal gas flow meter according to claim 1, characterized in that, The measuring mechanism includes a housing (310) mounted on the mounting pipe (100), a sensor substrate (320) disposed within the housing (310), a silicon nitride thin film (330) fixed inside the sensor substrate (320), a heating resistor (340) disposed within the silicon nitride thin film (330), temperature measuring resistors (350) distributed on both sides of the heating resistor (340), and an instrument (360) mounted on the housing (310).

3. The pipeline-type thermal gas flow meter according to claim 1, characterized in that, The shock absorption mechanism includes a heat dissipation sleeve (370) disposed on the outer layer of the buffer layer (220) and located on the side of the sealing layer (230) and a spring (380) disposed inside the heat dissipation sleeve (370).

4. A pipeline-type thermal gas flow meter according to claim 2, characterized in that, The bottom of the housing (310) has a heat dissipation vent (390) located above the heat dissipation layer (240).

5. A pipeline-type thermal gas flow meter according to claim 1, characterized in that, The buffer layer (220) is made of fluororubber with a thickness of 0.5-2 mm.

6. A pipeline-type thermal gas flow meter according to claim 1, characterized in that, The sealing layer (230) adopts a flexible graphite plate structure.

7. A pipeline-type thermal gas flow meter according to claim 1, characterized in that, The heat dissipation layer (240) is a composite structure of graphene and carbon fiber, wherein the mass percentage of graphene is 10%-30% and the carbon fiber is distributed in a mesh.

8. A pipeline-type thermal gas flow meter according to claim 3, characterized in that, The heat dissipation sleeve (370) has a honeycomb silicone rubber structure.

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