CN211504341U

CN211504341U - Automatic exhaust device and flowmeter verification equipment

Info

Publication number: CN211504341U
Application number: CN201922421239.7U
Authority: CN
Inventors: 李�杰
Original assignee: Qingdao Huade Meter Manufactured And Engineering Co ltd
Current assignee: Qingdao Huade Meter Manufactured And Engineering Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-09-15
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses an automatic exhaust device and flowmeter verification equipment, which comprises a verification pipeline, wherein a high point of the verification pipeline is vertically connected with an exhaust pipe, and the exhaust pipe is sequentially connected with an ultrasonic sensor group and an electric valve from bottom to top; the ultrasonic sensor group at least comprises two ultrasonic sensors which are respectively arranged on two sides of the exhaust pipe, and ultrasonic waves emitted by the ultrasonic sensor group cover the cross section of the exhaust pipe. The utility model has the advantages of simple and reasonable structure, the structural design of blast pipe is unique, and electric valve passes through control system automatic control, can discharge effectively and examine and determine the bubble in the pipeline, and furthest has guaranteed the accuracy of flowmeter examination result.

Description

Automatic exhaust device and flowmeter verification equipment

Technical Field

The utility model belongs to the technical field of the measuring equipment examination and specifically relates to an automatic exhaust apparatus and flowmeter examination equipment.

Background

The flow meter needs to be certified by flow meter certification equipment before shipment or after a certain period of use, and the certification equipment needs to be pre-vented before being certified or calibrated. The existing exhaust method is to discharge gas from a water outlet of a calibration pipeline before calibration is started, a large-caliber water flow meter calibration device is generally provided with a plurality of water inlet pipelines and water return pipelines, the pipe diameters are different, the flow meters to be detected are different, the required exhaust time is greatly different, and the difficulty is high by manual control; and the catchment pipe diameter of the return water pipeline of water inlet pipeline is greater than the sum of each inlet tube or return water pipe diameter, and the phenomenon of bubble gathering appears easily behind water entering catchment pipe by water inlet pipeline, and the catchment pipe end is the undergauge, and it is longer to examine and determine the pipeline, and the bubble is difficult for discharging, and once the bubble gets into the examination pipeline, the flowmeter by the examination flows through, then can lead to measuring unstability or the examination result deviation is too big.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a simple structure is reasonable, can discharge effectively and examine and determine the bubble in the pipeline, improves the automatic exhaust apparatus and the flowmeter calibration equipment of flowmeter examination precision.

The utility model adopts the technical proposal that:

an automatic exhaust device comprises a verification pipeline, wherein a high point of the verification pipeline is vertically connected with an exhaust pipe, and the exhaust pipe is sequentially connected with an ultrasonic sensor group and an electric valve from bottom to top; the ultrasonic sensor group at least comprises two ultrasonic sensors which are respectively arranged on two sides of the exhaust pipe, and ultrasonic waves emitted by the ultrasonic sensor group cover the cross section of the exhaust pipe.

The ultrasonic waves emitted by the ultrasonic sensor group cover the cross section of the exhaust pipe, when bubbles pass through the exhaust pipe, the ultrasonic sensor group can immediately detect signals and then send the signals to an external control system, and the control system controls the electric valve to be in an open state to exhaust; when the gas is exhausted completely, the ultrasonic sensor group cannot detect that bubbles pass through, and the detected flow is consistent with the flow of the standard flowmeter on the pipeline, the ultrasonic sensor group sends a signal to the control system, and the control system controls the electric valve to be closed to finish the exhaust.

Preferably, the ultrasonic sensor further comprises a manual valve and a glass window which are fixedly connected to the exhaust pipe, and the glass window is arranged between the manual valve and the ultrasonic sensor; the glass window is a transparent glass tube, and two ends of the glass window are hermetically connected with the exhaust tube; whether bubbles pass through the exhaust pipe or not can be observed through the glass window when the electric valve is in an open state, so that debugging and maintenance of the control system, the ultrasonic sensor and the electric valve are realized; when the electric valve or the ultrasonic sensor group is damaged, manual exhaust can be performed through the manual valve, and when bubbles cannot be observed from the glass window, the manual valve is closed, and the exhaust is finished.

Preferably, both ends of the glass window are fixedly connected to the exhaust pipe through flanges, and a sealing gasket is arranged between both ends of the glass window and the flanges to prevent water from leaking from the flange.

A flow meter verification device comprises a water storage tank, a water pump, a pressure stabilizing container, a water inlet pipe, a water collecting pipe, a detected flow meter, a water return pipe, a commutator and a metering container which are sequentially connected, wherein any one of the automatic exhaust devices is respectively arranged at the high point of the water collecting pipe and the high point of the water return pipe.

The utility model has simple and reasonable structure, unique structural design of the exhaust pipe, and the electric valve can effectively discharge bubbles in the verification pipeline through automatic control of the control system; bubbles in the pipeline always float above water, the automatic exhaust device is arranged at a high point of the verification pipeline, the bubbles in the pipeline enter the exhaust pipe, and the gas in the pipeline is ensured to be completely exhausted; in order to prevent the pipeline pressure change from influencing the verification result in the verification process, the exhaust valve is kept closed in the verification process, a small amount of generated bubbles enter the exhaust pipe and are retained in the exhaust pipe, the bubbles are prevented from flowing through the flowmeter to influence the verification result, and the accuracy of the verification result of the flowmeter is ensured to the maximum extent.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Reference numerals: 1. calibrating a pipeline; 2. an exhaust pipe; 3. a manual valve; 4. a glass window; 5. an ultrasonic sensor group; 6. an electrically operated valve; 7. a flange; 8. a long rod bolt.

Detailed Description

In order to enable those skilled in the art to better understand the present invention, the following detailed description of the invention is provided in conjunction with the accompanying drawings.

Example 1

An automatic exhaust device comprises a verification pipeline 1, wherein a high point of the verification pipeline 1 is vertically connected with an exhaust pipe 2, and the exhaust pipe 2 is sequentially connected with a manual valve 3, a glass window 4, an ultrasonic sensor group 5 and an electric valve 6 from bottom to top; the glass window 4 is a transparent glass tube, two ends of the glass window are hermetically connected with the exhaust pipe 2 through flanges 7, the two flanges 7 fix the glass window 4 through long rod bolts 8, and sealing gaskets are arranged between the two ends of the glass window 4 and the flanges 7; the ultrasonic sensor group 5 at least comprises two ultrasonic sensors which are respectively arranged at two sides of the exhaust pipe 2, so that ultrasonic waves emitted by the ultrasonic sensor group 5 cover the cross section of the exhaust pipe 2; the electric valve 6 and the ultrasonic sensor group 5 are respectively connected with a control system (not shown) arranged outside in a communication way.

Before the flowmeter is detected, all valves of the pipeline are kept in an open state, a flushing flow is operated for 1 minute, a water return main valve is closed, and exhaust is started; the ultrasonic waves emitted by the ultrasonic sensor group 5 cover the cross section of the exhaust pipe 2, when bubbles pass through the exhaust pipe 2, the ultrasonic sensor group 5 immediately detects a signal and then sends the signal to a control system, and the control system controls the electric valve 6 to keep an open state for exhausting; when the ultrasonic sensor group 5 cannot detect that bubbles pass and the detected flow rate is consistent with the flow rate of a standard flowmeter on the pipeline, indicating that the bubbles are exhausted, the ultrasonic sensor group 5 sends a signal to a control system, and the control system controls the electric valve 6 to close to finish exhaust; after the exhaust is completed, the electric valve 6 is not opened any more in the verification process. Observing whether bubbles pass through the exhaust pipe 2 when the electric valve 6 is in an open state through the glass window 4, thereby realizing debugging and maintenance of the control system, the ultrasonic sensor group 5 and the electric valve 6; when the electric valve 6 or the ultrasonic sensor group 5 is damaged, manual exhaust can be performed through the manual valve 3, when bubbles cannot be observed from the glass window 4, the manual valve 3 is closed, and the exhaust is finished; when the electric valve is damaged and can not be closed, the manual valve 3 is closed to prevent water from leaking from the exhaust pipe.

The bubble in the pipeline always floats above water, the automatic exhaust device is arranged at the high point of the verification pipeline 1, the bubble in the pipeline preferentially enters the exhaust pipe 2, the gas in the pipeline is completely discharged, and the accuracy of the verification result of the flowmeter is ensured to the maximum extent.

Example 2

The utility model also provides a flowmeter verification equipment, including water storage box, water pump, steady voltage container, inlet tube, catchment pipe, the flowmeter of being examined, wet return, commutator, the measurement container that connect gradually, water storage box, water pump, steady voltage container, inlet tube, the flowmeter of being examined, commutator, measurement container are prior art, and this embodiment does not do any improvement to it, and its structure is the same with prior art, no longer gives details; the improvement of the embodiment is that the automatic exhaust device of the embodiment 1 is respectively arranged at the high point of the water collecting pipe and the high point of the water return pipe, the specific structure of the automatic exhaust device is the same as that described in the embodiment 1, and the detailed description is omitted.

It is right above the utility model provides an automatic exhaust apparatus and flowmeter calibration equipment have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be subject to several improvements and modifications, which also fall within the scope of the claims of the present invention.

Claims

1. An automatic exhaust device comprises a verification pipeline and is characterized in that a high point of the verification pipeline is vertically connected with an exhaust pipe, and the exhaust pipe is sequentially connected with an ultrasonic sensor group and an electric valve from bottom to top; the ultrasonic sensor group at least comprises two ultrasonic sensors which are respectively arranged on two sides of the exhaust pipe, and ultrasonic waves emitted by the ultrasonic sensor group cover the cross section of the exhaust pipe.

2. The automatic exhaust device according to claim 1, further comprising a manual valve fixedly connected to the exhaust pipe and a glass window, wherein the glass window is disposed between the manual valve and the ultrasonic sensor; the glass window is a transparent glass tube, and two ends of the glass window are hermetically connected with the exhaust tube.

3. The automatic exhaust device according to claim 2, wherein two ends of the glass window are fixedly connected to the exhaust pipe through flanges, and sealing gaskets are arranged between the two ends of the glass window and the flanges.

4. A flow meter verification device comprises a water storage tank, a water pump, a pressure stabilizing container, a water inlet pipe, a water collecting pipe, a detected flow meter, a water return pipe, a commutator and a metering container which are connected in sequence, and is characterized in that an automatic exhaust device as claimed in any one of claims 1 to 3 is arranged at the high point of the water collecting pipe and the high point of the water return pipe respectively.