CN204788507U - Novel turbine flowmeter from feedback system has - Google Patents

Abstract

The utility model discloses a novel turbine flowmeter with a self-feedback system. The central through hole of the meter body is equipped with a front guide, a central shaft and a rear guide in sequence along the axial direction. The turbine is fixedly sleeved on the central shaft through a flat key, and both ends of the central shaft are mounted on the central passage of the meter body through a support frame. The hole is fixed in the radial direction, rolling bearings are installed between the two ends of the central shaft and the support frame, and an inner flange is provided in the center through hole of the watch body between the support frame on the side close to the rear diversion and the rear diversion; the front diversion There is an air bag inside to control the flow rate, the air bag is connected to the rubber tube, the rubber tube passes through the meter body and is connected to the air source through the regulating valve, the outside of the meter body is provided with a meter head, and the meter head is connected to the comparator together with the regulating valve. The utility model is equipped with a feedback system, which can adjust the flow; and reduces the installation accuracy error, reduces the impact damage, increases the service life, saves production and maintenance costs, has better rectification effect and guiding effect, and has strong adaptability. Versatile.

Description

A New Turbine Flowmeter with Self-feedback System

technical field

The utility model relates to a flowmeter, in particular to a new turbine flowmeter with a self-feedback system, which can obtain the required flow according to the set flow value.

Background technique

Turbine flowmeter is a speed type flow meter. The fluid impacts the turbine blades to make the turbine rotate. According to the relationship between the angular velocity of the turbine rotation and the flow value, the flow value is converted into the flow value according to the angular velocity of the turbine rotation. With good repeatability and other characteristics, it is one of the flowmeters with high precision in the flowmeters of today's era.

Turbine flowmeters can be widely used in petrochemical and other fields. Due to the advantages of wide measurement flow range, compact structure, simplicity, and long service life, turbine flowmeters are currently one of the most widely used flowmeters. With the development of my country's national economy since the reform and opening up, there are further requirements for the accuracy, life, function and other characteristics of flowmeters.

However, our country started the work of modern flow measurement technology late. We only had our own designed flowmeter in the 1960s. There is still a big gap with foreign developed countries in terms of flowmeter design technology and measurement accuracy. The disadvantages such as narrow application range, low measurement accuracy, single function and short life have become the main obstacles restricting the development of my country's flowmeter industry, and special technologies are urgently needed to solve and optimize them.

Utility model content

In order to solve the problems existing in the background technology, the utility model proposes a new type of turbine flowmeter with a self-feedback system, which improves the functional diversity of the flowmeter, prolongs the service life of the flowmeter, and makes the flowmeter It plays a very good role in the system, meets the use standard of the required flowmeter, has wider applicability, and meets the requirements of most working conditions.

The utility model not only solves the shortcomings of single function, short life and poor applicability, but also plays the role of a valve in the pipeline, and can obtain the required flow according to the set required flow value; saves production and maintenance costs, and improves The functional diversity of the flowmeter makes it suitable for more occasions, and it has significant technical progress compared with the flowmeter currently used.

The technical scheme that the utility model adopts is:

The utility model includes a meter body, a front diverter, a turbine, a rear diverter and a meter head. The central through hole of the meter body is equipped with a front diverter, a central shaft and a rear diverter in sequence along the axial direction, and the turbine is fixed by a flat key On the central shaft, both ends of the central shaft are installed in the central through hole of the meter body through the support frame and fixed radially. Rolling bearings are installed between the two ends of the central shaft and the support frame. There is an inner flange in the center through hole of the meter body between the rear guides; an air bag for controlling the flow is installed inside the front guide, the air bag is connected to the rubber tube, and the rubber tube passes through the meter body and is connected to the air source through the regulating valve. The outside of the body is provided with a meter head, which is connected to the comparator together with the regulating valve.

The meter head includes an angle sensor and a dial, the angle sensor is installed on the outer wall of the meter body, the angle sensor is connected with the dial, and the angle sensor is installed at a position corresponding to the turbine.

There is an annular groove on the peripheral surface of the middle part of the front guide flow, and an annular air bag is installed in the annular groove. The rubber tube passes through the hole on the watch body and enters the watch body to connect with the air bag. Between the rubber tube and the inner wall of the watch body Filling is installed in between, and the hole on the meter body is provided with a compression nut for compressing the packing.

The peripheral surfaces of the front flow guide, the support frame and the rear flow guide are symmetrically provided with protruding lines along the radial direction on both sides, and the convex lines are embedded in the grooves of the watch body to form circumferential positioning.

The thickness L of the front diversion is 0.8-1.2 times the diameter D of the center through hole of the surface body, the width d of the annular groove of the front diversion is 0.2-0.4 times the thickness L of the front diversion, and the inner and outer rings of the front diversion The number a of the partitions between is 6-8.

The thickness m of the rear guide is 0.7-0.9 times the diameter D of the center through hole of the surface body, and the number b of partitions between the inner and outer rings of the rear guide is 4-6.

The thickness n of the support frame is 0.6-0.8 times the diameter D of the central through hole of the surface body, and the number c of partitions between the inner and outer rings of the support frame is 4-6.

The blades of the turbine are rotating blades, the inner hole is provided with grooves, the number n of turbine blades is 6-10, and the blade rotation angle β is 25-50 degrees.

The beneficial effect that the utility model has is:

In addition to the basic functions of the flowmeter, the utility model also adds a self-feedback system to obtain the required flow according to the set flow value, which improves the functional diversity of the flowmeter and has a better effect on the fluid flowing through the flowmeter. The rectification and guiding function reduce the impact damage to the internal turbine of the flowmeter due to the sudden increase of the flow velocity.

The utility model saves the cost of production and maintenance, replaces the function of the valve in the pipeline, reduces the installation accuracy error when installing the valve, thereby increases the functional diversity of the flowmeter, and can obtain the required flow rate according to the set flow value. flow, wider adaptability, longer life, with significant technological innovation and technological progress.

The utility model can meet the needs of fields such as petroleum and chemical industry.

Description of drawings

Fig. 1 is a structural schematic diagram of a turbine flowmeter with a self-feedback system of the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the leading flow of the present invention.

Fig. 3 is a schematic diagram of the front diversion structure of the utility model.

Fig. 4 is a schematic diagram of the three-dimensional structure of the rear diversion flow.

Fig. 5 is a schematic diagram of the rear diversion structure.

Fig. 6 is a schematic diagram of the three-dimensional structure of the support frame.

Fig. 7 is a schematic diagram of the structure of the support frame.

Fig. 8 is a schematic diagram of a three-dimensional structure of a turbine.

Figure 9 is a structural diagram of the turbine.

In the figure: 1. Air source, 2. Regulating valve, 3. Comparator, 4. Meter body, 5. Rubber tube, 6. Compression nut, 7. Packing, 8. Front diversion, 9. Air bag, 10. Support frame, 11, turbine, 12, central shaft, 13, rolling bearing, 14, rear diversion, 15, flat key, 16, meter head.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, the utility model comprises a watch body 4, a front guide 8, a turbine 11, a rear guide 14 and a meter head 16, and the front guide 8, The central shaft 12 and the rear guide 14, the turbine 11 is fixedly sleeved on the central shaft 12 through the flat key 15, and both ends of the central shaft 12 are installed in the central through hole of the watch body 4 through the support frame 10 and fixed radially, the central shaft 12 Rolling bearings 13 are installed between the two ends and the support frame 10, and the center through hole of the surface body 4 between the support frame 10 and the rear flow guide 14 on the side close to the rear flow guide 14 is provided with an inner flange, which is close to the rear flow guide 14 The support frame 10 on one side is positioned in contact with the step of the inner flange; the air bag 9 used to control the flow is installed inside the front guide 8, the air bag 9 is connected with the rubber tube 5, and the rubber tube 5 passes through the meter body 4 and then passes through the regulating valve 2 The gas source 1 is connected, and a meter head 16 is arranged on the outside of the meter body 4 , and the meter head 16 is connected to the comparator 3 together with the regulating valve 2 .

The comparator 3, the regulating valve 2 and the air bag 9 of the utility model constitute a self-feedback system. Air is supplied to the air bag 9 through the air source 1, and the flow value flowing through the meter body is controlled according to the volume of the air bag 9, which functions as a valve.

The meter head 16 detects the rotation rate of the meter body and converts it into an instantaneous flow value. The meter head 16 has an instantaneous flow display, and a flow output signal is connected to the comparator 3. The comparator 3 compares the actual flow value with the required flow value. , the required flow value is the size of the flow controlled by the airbag 9 . The comparator 3 compares the instantaneous flow rate of the turbine flowmeter with the required flow value and then controls the opening of the regulating valve 2: when the required flow value is inconsistent with the actual flow value flowing through the flowmeter, the flow rate of the regulating valve is controlled. The opening is used to control the size of the airbag, thereby controlling the flow rate; when the instantaneous flow value of the turbine flowmeter is the same as the required flow value, the regulating valve 2 is closed, and the volume of the airbag remains unchanged. Control the opening degree of the regulating valve 2, indirectly control the size of the air bag 9, and simultaneously control the size of the flow.

When the output flow signal of the turbine flowmeter is greater than the required flow value, the comparator outputs an electrical signal to control the opening of the regulating valve 2, quantitatively controlling the amount of air supplied by the air source 1 to the air bag 9, thereby adjusting the flow through the meter body the size of.

Head 16 comprises angle sensor and dial, and angle sensor is installed on the outer wall of watch body 4, and angle sensor is connected with dial, and angle sensor is contained in the corresponding position with turbine 11.

There is an annular groove on the peripheral surface of the middle part of the front diversion flow 8, and an annular air bag 9 is housed in the annular groove. 4. Packing 7 is installed between the inner walls, and the hole on the surface body 4 is provided with a compression nut 6 for compressing the packing 7.

There is an annular groove inside the leading flow 8, so that the air bag is installed. When the air bag 9 is full, the air bag 9 is in close contact with the surfaces of the annular groove of the leading flow 8 to form a seal, and the air bag 9 and the shaft of the leading flow 8 have a good sealing effect.

Both sides of the peripheral surfaces of the front diverter 8 , the support frame 10 and the rear diverter 14 are symmetrically provided with protruding lines along the radial direction, and the protruding lines are embedded in the grooves of the watch body 4 to form circumferential positioning.

As shown in Figure 2 and Figure 3, the thickness L of the leading flow 8 is 0.8-1.2 times the diameter D of the central through hole of the surface body 4, and the width d of the annular groove of the leading flow 8 is 0.2 times the thickness L of the leading flow 8. -0.4 times, the number a of the partitions between the inner and outer rings of the front guide 8 is 6-8, which has a better rectification effect, and can reduce the impact damage to the turbine when the flow pressure is relatively high.

As shown in Figure 4 and Figure 5, the thickness m of the rear guide 14 is 0.7-0.9 times the diameter D of the central through hole of the surface body 4, and the number b of the partitions between the inner and outer rings of the rear guide 14 is 4-6 A, at this time there is a better steady flow effect.

As shown in Figures 6 and 7, the thickness n of the support frame 10 is 0.6-0.8 times the diameter D of the central through hole of the surface body 4, and the number c of partitions between the inner and outer rings of the support frame 10 is 4-6.

As shown in Figures 8 and 9, the blades of the turbine 11 are rotary blades, and the inner hole is provided with grooves, so that the turbine 11 is inserted into the central shaft 12 and fixed circumferentially by the flat key 15. The number n of blades of the turbine 11 is 6-10 blades, the blade rotation angle β is 25-50 degrees, when the fluid impinges on the blades to drive the turbine to rotate, there is a good proportional relationship between the fluid flow and the number of rotations of the turbine.

Working process and principle of the present utility model are:

When the fluid flows through the inlet of the meter body, it is rectified and guided by the leading flow to obtain a stable fluid, and the fluid impacts the turbine to make the turbine rotate. Under certain circumstances, the angular velocity of the turbine rotation and the flow through the meter body The fluid flow value is directly proportional, and the angular velocity of the turbine rotation is measured by the angular velocity sensor, and converted into a fluid flow signal at the same time, and displayed on the dial of the meter head.

The meter output flow signal according to the measured flow value, the flow signal is connected to the comparator, and the comparator compares the set flow value with the output flow value signal of the meter head, when the flow value is inconsistent, the comparator sends out a power Signal to control the opening of the regulating valve. The gas is released from the air source and reaches the regulating valve through the rubber tube. Due to the change of the opening of the regulating valve, the gas delivered to the airbag is also constantly changing, and the volume of the airbag is also changing. Due to the change of the volume of the air bag, the flow rate flowing through the inside of the meter body also changes. The turbine flowmeter measures the flow rate at this time, and the flow signal is transmitted to the comparator. When the flow value is consistent, the comparator sends out an electrical signal to close the regulating valve; if the set flow value at this time is inconsistent with the flow value measured by the flowmeter, the comparator continues to control and adjust the opening until the flow signal is consistent. When the set flow value is zero, when the gas in the airbag is full, the airbag forms a good seal with the shaft and surface body of the leading flow, and no fluid flows through the turbine at this time.

There is an annular groove on the surface where the front guide flow and the surface body are in contact with the air bag, so that the air bag has a better sealing effect with the surface body and the front guide flow under the condition of a certain volume. The front diversion and rear diversion have a good rectification and guiding effect on the flowing fluid when the number of partitions is constant, and the front diversion has a good buffering effect on the fluid with a sudden increase in flow velocity. The damage to the turbine caused by the sudden increase of the fluid velocity is alleviated.

The utility model does not need to adjust the valve in the pipeline to obtain the required flow value, replaces the role of the valve in the pipeline, reduces the installation accuracy error when the valve and the flow meter are installed separately in the entire pipeline, and uses the airbag to seal It can effectively avoid the friction damage of the valve core and the valve seat during the movement process, thus the utility model improves the function and adaptability of the flowmeter, adapts to the control of fluid and the measurement of flow in various occasions, and improves the The life of the flowmeter reduces maintenance and manufacturing costs, and has prominent social and technical effects.

Claims (8)

1. A new type of turbine flowmeter with self-feedback system, including meter body (4), front guide (8), turbine (11), rear guide (14) and meter head (16), meter body (4 ) in the central through hole along the axial direction in order to install the front guide (8), the central shaft (12) and the rear guide (14), the turbine (11) is fixed on the central shaft (12) through the flat key (15) It is characterized in that both ends of the central shaft (12) are installed in the central through hole of the watch body (4) through the support frame (10) and fixed radially, and the two ends of the central shaft (12) are connected with the support frame (10) Rolling bearings (13) are installed between them, and an inner flange is provided in the center through hole of the surface body (4) between the support frame (10) on the side of the rear guide (14) and the rear guide (14); The flow (8) is equipped with an air bag (9) for flow control, the air bag (9) is connected to the rubber tube (5), the rubber tube (5) passes through the meter body (4) and then connects to the air source through the regulating valve (2) (1), the outer side of the meter body (4) is provided with a meter head (16), and the meter head (16) is connected to the comparator (3) together with the regulating valve (2). 2. A new type of turbine flowmeter with a self-feedback system according to claim 1, characterized in that: the meter head (16) includes an angle sensor and a dial, and the angle sensor is installed on the outside of the meter body (4) wall, the angle sensor is connected with the dial, and the angle sensor is installed in the position corresponding to the turbine (11). 3. A new type of turbine flowmeter with a self-feedback system according to claim 1, characterized in that: an annular groove is formed on the middle surface of the front diversion flow (8), and an annular groove is installed in the annular groove. The airbag (9), the rubber tube (5) passes through the hole on the surface body (4) and enters the surface body (4) to connect the airbag (9), between the rubber tube (5) and the inner wall of the surface body (4) Packing (7) is installed, and the hole on the meter body (4) is provided with a compression nut (6) for compressing the packing (7). 4. A new type of turbine flowmeter with a self-feedback system according to claim 1, characterized in that: the peripheral surfaces of the front guide (8), the support frame (10) and the rear guide (14) Both sides are symmetrically provided with convex lines along the radial direction, and the convex lines are embedded in the grooves of the watch body (4) to form circumferential positioning. 5. A new type of turbine flowmeter with a self-feedback system according to claim 1, characterized in that: the thickness L of the front diversion flow (8) is 0.8 of the diameter D of the central through hole of the meter body (4) —1.2 times, the width d of the annular groove of the front guide (8) is 0.2-0.4 times of the thickness L of the front guide (8), and the number a of the partitions between the inner and outer rings of the front guide (8) is 6 -8. 6. A new type of turbine flowmeter with a self-feedback system according to claim 1, characterized in that: the thickness m of the rear diversion flow (14) is 0.7 of the diameter D of the central through hole of the meter body (4) -0.9 times, the number b of partitions between the inner and outer rings of the rear diversion (14) is 4-6. 7. A new type of turbine flowmeter with a self-feedback system according to claim 1, characterized in that: the thickness n of the support frame (10) is 0.6— 0.8 times, the number c of partitions between the inner and outer ring bodies of the support frame (10) is 4-6. 8. A new type of turbine flowmeter with a self-feedback system according to claim 1, characterized in that: the blades of the turbine (11) are rotary blades with grooves in the inner hole, and the number of turbine blades is n 6-10, the blade rotation angle β is 25-50 degrees.