Gas flowmeter

Abstract

The utility model relates to the technical field of flowmeter sealing, in particular to a gas flowmeter which is characterized in that a gas flowmeter body is mounted on a conveying pipeline through connecting flanges on two sides; sealing devices are arranged outside the connecting flanges on the two sides; the sealing device comprises an adjusting rotary drum and two rubber sleeves; the rubber sleeves are rotationally connected to the outer surface of the conveying pipeline and the outer surface of the measuring pipe in a sleeving mode. An external thread is arranged on the outer surface of the rubber sleeve; the rotating directions of the external threads of the two rubber sleeves are opposite; the wall thickness of the rubber sleeve is gradually increased from one end close to the connecting flange to the outer side; the adjusting rotary drum is rotationally arranged outside the connecting flange; an internal thread is arranged in the adjusting rotary drum; the rotating directions of the internal threads are opposite, and the internal threads are matched with the external threads of the two rubber sleeves; an air outlet is formed in the adjusting rotary drum; a detection sensor is further arranged on the adjusting rotary drum; the maintenance efficiency is effectively improved, and the practicability of the flowmeter is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flowmeter sealing technical field especially a gas flowmeter. BACKGROUND

[0002] Flow instrument is one of the large category instruments in process automation instrument and device, it is widely used in metallurgy, electric power, coal, chemical industry, petroleum, transportation, building, light and textile, food, medicine, agriculture, environmental protection and people's daily life etc. national economy each field, is the important tool of developing industrial and agricultural production, saving energy, improving product quality, improving economic benefit and management level and occupies the important position in national economy.

[0003] In the use process of gas flowmeter, sealing structure is designed to seal the pipe end of gas flowmeter, so as to prevent gas leakage and cause inaccurate gas flow measurement, the existing sealing structure is generally elastic rubber sealing gasket, which is easy to cause its own material aging and lose elasticity after long time use or due to environmental reasons, so that the sealing effect is poor, and gas leaks from the connecting flange, since the leakage degree is small, it is not easy to detect, so that the maintenance personnel cannot timely repair the leakage, thereby leading to poor practicability. UTILITY MODEL CONTENTS

[0004] The purpose of the present application is to provide a gas flowmeter, which aims to solve the problems in the prior art.

[0005] The gas flowmeter provided by the embodiment of the present application comprises a gas flowmeter body and a sealing device, the gas flowmeter body is installed on a conveying pipeline through two side connecting flanges; the gas flowmeter body comprises a display instrument, a measuring pipe and a connecting flange; the two side connecting flanges are each provided with the sealing device outside; the sealing device comprises an adjusting rotating cylinder and two rubber sleeves; the rubber sleeves are respectively rotationally sleeved on the outer surfaces of the conveying pipeline and the measuring pipe; the outer surfaces of the rubber sleeves are provided with external threads; the external threads of the two rubber sleeves are opposite in direction; the wall thickness of the rubber sleeve gradually increases from one end close to the connecting flange to the outside; the adjusting rotating cylinder is rotationally arranged outside the connecting flange; the adjusting rotating cylinder is internally provided with internal threads; the internal threads are located at two ends of the adjusting rotating cylinder; the internal threads are opposite in direction and match with the external threads of the two rubber sleeves; the adjusting rotating cylinder is provided with a gas outlet; the adjusting rotating cylinder is further provided with a detection sensor; the gas flowmeter body is provided with an alarm device; and the gas output end of the conveying pipeline is provided with a connecting port.

[0006] Further, the connecting port is in communication with a connecting pipe, and the end of the connecting pipe is provided with a branch; and the connecting pipe is a telescopic pipe.

[0007] Further, the branch of the connecting pipe is respectively provided with a one-way valve.

[0008] Further, the display instrument is provided with a wireless transmission module; the wireless transmission module is electrically connected with the gas flow meter body and the detection sensor respectively.

[0009] Further, the detection sensor is electrically connected with an alarm device; the alarm device is installed on the front side of the measuring pipe.

[0010] The utility model discloses a beneficial effect is: the utility model discloses a rotary adjusting drum, and the rubber sleeve of both sides moves to the direction of connecting flange in the middle, because the wall thickness of rubber sleeve increases, gradually fills the gap between adjusting drum and pipeline along with the movement, and finally forms a sealed space, effectively prevents the slight leakage caused by equipment aging, transports the leaked gas to the conveying pipeline through the connecting pipe, prevents the gas from leaking out, increases the practicability of flow meter, and sets up detection device and alarm equipment to prompt the maintenance personnel, and conveniently carries out the repair to the leakage place in time. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is structural schematic diagram of the utility model.

[0012] Figure 2 It is structural schematic diagram of the sealing device.

[0013] In the drawing:

[0014] 1, conveying pipeline;11, gas output end;12, connecting port;2, measuring pipe;3, connecting flange;4, adjusting drum;41, internal thread;42, gas outlet;5, rubber sleeve;51, external thread;6, display instrument;7, connecting pipe;71, detection sensor;72, one-way valve. DETAILED DESCRIPTION

[0015] 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 ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0016] As Figure 1 And Figure 2The gas flow meter shown in the figure, including gas flow meter body and sealing device, the gas flow meter body is installed on the conveying pipeline 1 by two side connecting flanges 3; the gas flow meter body includes display instrument 6, measuring pipe 2 and connecting flange 3; the two side connecting flanges 3 are provided with sealing devices outside; the sealing device includes adjusting rotating cylinder 4 and two rubber sleeves 5; the rubber sleeves 5 are respectively rotatably sleeved on the outer surfaces of the conveying pipeline 1 and the measuring pipe 2; the rubber sleeves 5 are located on the two sides of the connecting flange 3, and the outer surfaces of the rubber sleeves 5 are provided with external threads 51; the external threads of the two rubber sleeves 5 are opposite in direction; the wall thickness of the rubber sleeve 5 gradually increases from one end close to the connecting flange 3 to the outside; the adjusting rotating cylinder 4 is rotatably arranged outside the connecting flange 3; the adjusting rotating cylinder 4 is provided with internal threads 41 inside; the internal threads 41 are located at the two ends of the adjusting rotating cylinder 4; the internal threads 41 are opposite in direction and match with the external threads 51 of the two rubber sleeves 5; rotating the adjusting rotating cylinder 4 makes the two rubber sleeves 5 on the two sides move towards the middle connecting flange 3; due to the gradually increasing wall thickness of the rubber sleeve 5, the gap between the adjusting rotating cylinder 4 and the pipeline is gradually filled as the rubber sleeve 5 moves inward, and finally a sealed space is formed, which effectively prevents the slight gas leakage caused by equipment aging, and at the same time, the leaked gas is transported into the conveying pipeline 1 through the connecting pipe 7, so that the gas is not leaked outside; the adjusting rotating cylinder 4 is provided with a gas outlet 42; the adjusting rotating cylinder 4 is also provided with a detection sensor 71; when the detection sensor 71 detects gas leakage, it indicates that the sealing gasket between the pipelines has been damaged and needs to be replaced in time; the gas flow meter body is provided with an alarm device; the gas output end 11 of the conveying pipeline is provided with a connecting port 12.

[0017] The connecting port 12 communicates with the connecting pipe 7, and the end of the connecting pipe 7 is provided with a branch; the connecting pipe 7 is a telescopic pipe.

[0018] The branch of the connecting pipe 7 is respectively provided with a one-way valve 72; the one-way valve 72 is mainly used for preventing the gas in the conveying pipeline 1 from flowing backward; the end of the branch is connected with the gas outlet 42 through threads; due to the telescopic nature of the connecting pipe 7, no matter where the gas outlet 42 on the adjusting rotating cylinder 4 is rotated, the connecting pipe 7 can be connected with the gas outlet 42.

[0019] The display instrument 6 is provided with a wireless transmission module, which is not shown in the figure; the wireless transmission module is electrically connected with the gas flow meter body and the detection sensor 71 respectively; the wireless transmission module can remotely send the leakage information to the control center at the first time when the gas leakage occurs.

[0020] The detection sensor 71 is electrically connected with an alarm device; the alarm device is installed on the front side of the measuring pipe 2, and the alarm device can be an alarm or a warning light, which is not shown in the figure; when the detection sensor 7 detects that gas appears to leak, the alarm device can control the alarm to alarm, so as to remind the staff to replace in time, thereby enhancing the practicability.

[0021] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A gas flow meter, comprising a gas flow meter body and a sealing device, characterized in that, The gas flow meter body is mounted on the delivery pipeline via connecting flanges on both sides. The gas flow meter body includes a display instrument, a measuring tube, and connecting flanges. Sealing devices are provided on the exterior of both connecting flanges. Each sealing device includes an adjusting drum and two rubber sleeves. The rubber sleeves are rotatably fitted onto the outer surfaces of the delivery pipeline and the measuring tube, respectively. External threads are provided on the outer surfaces of the rubber sleeves. The external threads of the two rubber sleeves rotate in opposite directions. The wall thickness of the rubber sleeves gradually increases outwards from the end closest to the connecting flange. The adjusting drum is rotatably positioned outside the connecting flange. Internal threads are provided inside the adjusting drum. The internal threads are located at both ends of the adjusting drum. The internal threads rotate in opposite directions and mesh with the external threads of the two rubber sleeves. An outlet is provided on the adjusting drum. A detection sensor is also provided on the adjusting drum. An alarm device is provided on the gas flow meter body. A connection port is provided at the gas output end of the delivery pipeline.

2. The gas flow meter according to claim 1, characterized in that, The connection port is connected to the connecting pipe, and the end of the connecting pipe is provided with a branch; the connecting pipe is a telescopic pipe.

3. The gas flow meter according to claim 2, characterized in that, Each branch of the connecting pipe is equipped with a one-way valve; the end of each branch is connected to the air outlet by a thread.

4. The gas flow meter according to claim 1, characterized in that, The display instrument is equipped with a wireless transmission module; the wireless transmission module is electrically connected to the gas flow meter body and the detection sensor respectively.

5. The gas flow meter according to claim 4, characterized in that, The detection sensor is electrically connected to the alarm device; the alarm device is installed on the front side of the measuring tube.

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