CN209857980U

CN209857980U - Sealed gear flowmeter

Info

Publication number: CN209857980U
Application number: CN201920736886.4U
Authority: CN
Inventors: 卢强; 年亚东; 张�浩
Original assignee: Hefei Jingjie Instrument Co Ltd
Current assignee: Hefei Jingjie Instrument Co Ltd
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2019-12-27
Anticipated expiration: 2029-05-22

Abstract

The utility model relates to a sealed gear flowmeter, inlet and liquid outlet including the flowmeter body and being located flowmeter body both ends, it is located the connecting rod of connection on shells inner wall to be equipped with between inlet and the liquid outlet, radial helical blade on the connecting rod outer wall is used for the rotation of liquid flow direction, radial helical blade bottom is connected with the thrust bearing frame that is located the shells inner wall bottom through footstep bearing, and the connecting rod inner wall both ends are respectively through changeing tooth and central tooth intermeshing transmission, central tooth one end runs through the connecting rod and is connected with the loose axle transmission, the other end with run through the connecting rod and be connected with the footstep bearing transmission, the loose axle both ends all are connected with the journal bearing that is located on the shells inner wall, the journal bearing top. Has the advantages that: the utility model discloses measurement accuracy is high, also can realize the higher mechanical transmission of sensitivity to less flow, and the transmission is stable, long service life.

Description

Sealed gear flowmeter

Technical Field

The utility model relates to a flowmeter technical field, concretely relates to sealed gear flowmeter.

Background

The gear flowmeter has high processing precision, precise installation and high resolution, and the measured medium of the gear flowmeter is required to be lubricating and can not measure non-lubricating medium, such as water. Meanwhile, the gear flowmeter is not suitable for fluid containing solid particles, measurement errors can be caused if gas is mixed in a measured liquid medium, a pair of gears meshed with each other is arranged in a flowmeter cavity and serves as a rotor, the two gears and the cavity can respectively form a fixed volume, and flow counting is carried out by calculating the number of standard volumes in a certain time.

The gear flowmeter of the present day has the following problems in the working process: most conventional gear flow meters use mechanical transmission counters to indicate the accumulated flow on site. But because the friction between the mechanical transmission spare is great for transmission efficiency reduces, can not great drive gear rotation to the small change of flow, influences the counting precision, and the transmission of using each transmission spare for a long time simultaneously also can receive it to influence, is unfavorable for the installation to use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sealed gear flowmeter provides the sealed gear flowmeter that measurement accuracy is high and the sensitivity is strong.

In order to realize the above purpose, the utility model discloses a technical scheme be: a sealed gear flowmeter comprises a flowmeter body, a liquid inlet and a liquid outlet which are arranged at two ends of the flowmeter body, a connecting rod which is arranged on the inner wall of a shell and is connected between the liquid inlet and the liquid outlet, a radial helical blade on the outer wall of the connecting rod is used for rotating in the flowing direction of liquid, the bottom end of the radial helical blade is connected with a thrust bearing seat which is arranged at the bottom of the inner wall of the shell through a thrust bearing, two ends of the inner wall of the connecting rod are respectively meshed with a central tooth through a rotating tooth for transmission, one end of the central tooth penetrates through the connecting rod and is connected with a movable shaft in a transmission way, the other end of the central tooth penetrates through the connecting rod and is connected with the thrust bearing seat in a transmission way, two ends of the movable shaft are both connected with radial bearings which are arranged on the inner wall of the shell, a shaft connecting, and one end of the movable shaft is connected with a counter positioned on the flowmeter body through a transmitting disc.

Furthermore, the connecting rod is movably connected with the inner wall of the shell through a rolling seat, and a shaft sleeve arranged on the rolling seat is arranged between the connecting rod and the inner wall of the shell.

Furthermore, an oil cup is installed on the outer wall of the flowmeter body, and is provided with a through hole extending to the movable shaft.

Furthermore, a hand wheel on the flowmeter body is installed at one end of the flowmeter body through the valve, and the hand wheel is used for adjusting the degree of opening and closing of the valve.

Furthermore, the control circuit on the letter sending disc and the wiring terminal on the counter are controlled by a relay circuit, and the PLC control can also be adopted.

The technical effects of the utility model reside in that: the radial helical blade is adopted between the liquid inlet and the liquid outlet, the rotation of a gear transmission system can be caused aiming at the small change of the flow, the radial helical blade firstly drives the connecting rod to rotate, then the central tooth is enabled to realize reversing rotation through the rotating tooth, the thrust bearing seat connected with the thrust bearing on the central tooth can prevent the rotation of the blade from influencing the metering result, finally, the rotating signal is transmitted to the counter through the transmitting disc by the movable shaft, the exhaust cock on the connecting shaft seat can balance the overlarge pressure in the shaft sealing cavity, the service performance is greatly improved by the sealed gear flowmeter, the sealed gear flowmeter is safe and stable, the measuring precision is high, the mechanical transmission with higher sensitivity can be realized for smaller flow, and the applicability is strong.

Drawings

FIG. 1 is a schematic structural view of a sealed gear flow meter according to the present invention;

fig. 2 is a schematic view of the connection between the rotary teeth and the central teeth of the present invention.

Reference numerals: 1-a flow meter body; 2-liquid inlet; 3-a liquid outlet; 4-a connecting rod; 5-radial helical blades; 6-a thrust bearing; 7-thrust bearing seats; 8-rotating teeth; 9-center tooth; 10-a movable shaft; 11-a radial bearing; 12-connecting a shaft seat; 13-exhaust cock; 14-a shaft-out seal cavity; 15-a counter; 16-a rolling seat; 17-oil cup; 18-handwheel.

Detailed Description

Referring to the attached drawings 1-2, a sealed gear flowmeter comprises a flowmeter body 1, and a liquid inlet 2 and a liquid outlet 3 which are arranged at two ends of the flowmeter body 1, and is characterized in that a connecting rod 4 which is arranged on the inner wall of a shell is arranged between the liquid inlet 2 and the liquid outlet 3, a radial helical blade 5 on the outer wall of the connecting rod 4 is used for rotating in the flowing direction of liquid, the bottom end of the radial helical blade 5 is connected with a thrust bearing seat 7 which is arranged at the bottom of the inner wall of the shell through a thrust bearing 6, two ends of the inner wall of the connecting rod 4 are respectively meshed with a central tooth 9 through a rotating tooth 8 for transmission, one end of the central tooth 9 penetrates through the connecting rod 4 and is in transmission connection with a movable shaft 10, the other end of the central tooth penetrates through the connecting rod 4 and is in transmission connection with the, a connecting shaft seat 12 connected with the movable shaft 10 is arranged above the radial bearing 11, an output shaft sealing cavity 14 positioned at the top of the inner wall of the shell is arranged at the top end of the connecting shaft seat 12 through an exhaust cock 13, and one end of the movable shaft 10 is connected with a counter 15 positioned on the flowmeter body 1 through a signal transmitting disc.

Preferably, the bottom end of the radial helical blade 5 is connected with a thrust bearing seat 7 positioned at the bottom of the inner wall of the shell through a thrust bearing 6, when liquid enters the liquid inlet 2, the radial helical blade 5 can rotate towards one direction under the action of pressure difference, the thrust bearing 6 connected with a connecting rod 4 on the radial helical blade 5 can effectively prevent the radial helical blade 5 from rotating under the action of the thrust bearing seat 7, the measurement and counting of the flowmeter are not facilitated, two ends of the inner wall of the connecting rod 4 are respectively in meshed transmission with a central tooth 8 and a central tooth 9, one end of the central tooth 9 penetrates through the connecting rod 4 and is in transmission connection with the movable shaft 10, the rotation of the connecting rod 4 can drive the rotating teeth 8 at two ends of the inner wall to move, the axial movement of the rotating teeth 8 can drive the radial movement of the central tooth 9, so that the power is transmitted to the movable, therefore, the flow information is reflected by the counter through the transmission system.

Preferably, the connecting rod 4 and the inner wall of the shell are movably connected through a rolling seat 16 and are provided with shaft sleeves arranged on the rolling seat 16, and the shaft sleeves on the rolling seat 16 can play an effective friction protection role when the connecting rod 4 and balls in the rolling seat move, so that the service life is prolonged.

Preferably, an oil cup 17 is installed on the outer wall of the flowmeter body 1, the oil cup 17 is provided with a through hole extending to the movable shaft 10, and when the transmission of the mechanical transmission part is not smooth, lubricating oil can be led in through the through hole in the oil cup 17, so that the sliding effect of the parts is increased.

Preferably, the hand wheel 18 on the flowmeter body 1 is installed through the valve to flowmeter body 1 one end for the degree of opening and closing of regulating valve, through the regulation of hand wheel 18, can control the valve switch, and then lets flowmeter body 1 prevent that the dust granule from entering into the pipeline when not using, and then influences the use of device.

Preferably, the terminal on the counter 15 and the control circuit on the letter-sending plate are controlled by a relay circuit, and can also be controlled by a PLC.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A sealed gear flowmeter comprises a flowmeter body (1) and a liquid inlet (2) and a liquid outlet (3) which are positioned at two ends of the flowmeter body (1), and is characterized in that a connecting rod (4) which is positioned and connected on the inner wall of a shell is arranged between the liquid inlet (2) and the liquid outlet (3), a radial helical blade (5) on the outer wall of the connecting rod (4) is used for rotating in the flowing direction of liquid, the bottom end of the radial helical blade (5) is connected with a thrust bearing seat (7) which is positioned at the bottom of the inner wall of the shell through a thrust bearing (6), two ends of the inner wall of the connecting rod (4) are respectively meshed with a central tooth (9) through rotating teeth (8) for transmission, one end of the central tooth (9) penetrates through the connecting rod (4) and is in transmission connection with a movable shaft (10), and the other end of the central tooth penetrates through, the movable shaft is characterized in that both ends of the movable shaft (10) are connected with radial bearings (11) located on the inner wall of the shell, a shaft connecting seat (12) connected with the movable shaft (10) is arranged above the radial bearings (11), the top end of the shaft connecting seat (12) is arranged on an outlet shaft sealing cavity (14) at the top of the inner wall of the shell through an exhaust cock (13), and one end of the movable shaft (10) is connected with a counter (15) located on the flowmeter body (1) through a letter sending disc.

2. A sealed gear flowmeter according to claim 1, characterized in that the connecting rod (4) is movably connected to the inner wall of the housing by means of a rolling seat (16) and is provided with a bushing placed on the rolling seat (16).

3. A sealed gear flow meter according to claim 1, characterized in that an oil cup (17) is mounted on the outer wall of the flow meter body (1), said oil cup (17) being provided with a through hole extending to said movable shaft (10).

4. A sealed gear flow meter according to claim 1, characterized in that the flow meter body (1) is fitted at one end with a hand wheel (18) on the flow meter body (1) via the valve for adjusting the degree of opening and closing of the valve.

5. A sealed gear flow meter according to claim 1, characterised in that the terminals on the counter (15) and the control circuit on the letter plate and between them are controlled by means of a relay circuit, also PLC.