CN220871806U

CN220871806U - Low-flow turbine flowmeter

Info

Publication number: CN220871806U
Application number: CN202321888205.9U
Authority: CN
Inventors: 张蔚; 顾永军
Original assignee: Shanghai Yinliu Measuring Instrument Co ltd
Current assignee: Shanghai Yinliu Measuring Instrument Co ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2024-04-30
Anticipated expiration: 2033-07-18

Abstract

The utility model discloses a low-flow turbine flowmeter, which relates to the technical field of flowmeters and comprises a shell, wherein two first bearing seats are fixedly arranged in the shell, a large impeller is rotationally connected between the two first bearing seats, a branch pipe is fixedly arranged at the bottom of the shell, a connecting pipe is fixedly arranged in the middle of the branch pipe, two second bearing seats are fixedly arranged in the connecting pipe, a small impeller is rotationally connected between the two second bearing seats, a display is fixedly arranged on the front surfaces of the shell and the connecting pipe, a display screen is arranged on the front surfaces of the display, a plugging assembly is fixedly arranged in the shell, and is positioned between the first bearing seats and the connecting part of the branch pipe and the shell.

Description

Low-flow turbine flowmeter

Technical Field

The utility model relates to the technical field of flowmeters, in particular to a low-flow turbine flowmeter.

Background

The turbine flowmeter is a speed type flow metering device with temperature and pressure compensation functions, belongs to one of speed type flowmeters, and has the following working principle: the dynamic force of flowing fluid drives the turbine blade to rotate, the rotation speed is approximately proportional to the volume flow, the fluid volume indication value passing through the flowmeter takes the turbine impeller revolution as a reference, and the turbine flowmeter has the characteristics of high measurement accuracy, good repeatability and stability, wide measuring range, rapid change reaction to the flow, strong anti-interference capability, convenient signal transmission and the like, and is widely applied to the fields of petroleum, chemical industry, electric power, gas pipe networks, urban gas and the like.

At present, the existing turbine flowmeter is often used in a pipeline with a higher flow speed, when the water flow speed is lower, the impeller rotates less, even does not rotate, the flow detection precision is affected, and based on the existing problems, we propose a low-flow turbine flowmeter.

Disclosure of utility model

The present utility model is directed to a low flow turbine flowmeter that solves the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a low-flow turbine flowmeter, includes the shell, set firmly two bearing frames one in the shell, rotate between two bearing frames one and be connected with big impeller, the bottom of shell has set firmly the branch pipe, the middle part of branch pipe has set firmly the connecting pipe, set firmly two bearing frames two in the connecting pipe, rotate between two bearing frames two and be connected with little impeller, the front of shell and connecting pipe has set firmly the display, the display screen is installed in the front of display, still set firmly the shutoff subassembly in the shell, the shutoff subassembly is in the position between bearing frame one and branch pipe and the shell junction.

Preferably, a plurality of annularly arranged rectifying plates are fixedly arranged on the outer wall of the first bearing seat.

Preferably, a shielding cover positioned on the outer side of the display screen is fixedly arranged on the top of the display.

Preferably, a stop valve is arranged on the outer wall of the branch pipe at a position close to the plugging assembly.

Preferably, the plugging component comprises a fixed ring fixedly connected in the shell, a fixed frame is fixedly connected on the side wall of the fixed ring, a movable rod is sleeved in the fixed frame, an anti-drop block is fixedly connected at one end of the movable rod, a spring is sleeved on the outer wall of the fixed rod between the fixed frame and the anti-drop block, and a movable ring is fixedly connected at the other end of the movable rod.

Preferably, the side wall of the movable ring is provided with a plurality of through holes, and the positions of the through holes correspond to the side wall of the fixed ring.

Compared with the prior art, the utility model has the beneficial effects that:

The turbine flowmeter can be adjusted according to the fluid flow state, and the two groups of impellers with different sizes rotate to measure flow data in the high-low flow state, so that the measurement requirement of the turbine flowmeter is met, the application range of the turbine flowmeter is expanded, the measurement accuracy of the turbine flowmeter can be guaranteed not to be affected when the flow is low, and the practicability is higher.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of the overall cross-section of the present utility model;

FIG. 3 is a schematic view of the structure of the plugging assembly of the present utility model;

fig. 4 is a schematic structural view of the movable ring of the present utility model.

In the figure: 1. a housing; 2. a first bearing seat; 3. a large impeller; 4. a rectifying plate; 5. a branch pipe; 6. a connecting pipe; 7. a second bearing seat; 8. a small impeller; 9. a display; 10. a display screen; 11. a shield; 12. a stop valve; 13. a plugging assembly; 131. a fixing ring; 132. a fixing frame; 133. a movable rod; 134. an anti-falling block; 135. a spring; 136. a movable ring; 137. and a through hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-4, a low-flow turbine flowmeter in the drawings comprises a housing 1, two first bearing seats 2 are fixedly arranged in the housing 1, a large impeller 3 is rotationally connected between the first bearing seats 2, a branch pipe 5 is fixedly arranged at the bottom of the housing 1, a connecting pipe 6 is fixedly arranged in the middle of the branch pipe 5, two second bearing seats 7 are fixedly arranged in the connecting pipe 6, a small impeller 8 is rotationally connected between the two second bearing seats 7, a display 9 is fixedly arranged on the front surfaces of the housing 1 and the connecting pipe 6, a display screen 10 is arranged on the front surfaces of the display 9, a plugging component 13 is fixedly arranged in the housing 1, and the plugging component 13 is positioned between the first bearing seats 2 and the joint of the branch pipe 5 and the housing 1.

Wherein, a plurality of annularly arranged rectifying plates 4 are fixedly arranged on the outer wall of the bearing seat I2; so that the fluid is in a regular state when flowing through the large impeller 3, thereby eliminating the adverse effect of disturbance on metering and having high metering accuracy.

Wherein, the top of the display 9 is fixedly provided with a baffle cover 11 positioned outside the display screen 10; dust can be reduced from falling on the display screen 10.

Wherein, a stop valve 12 is arranged at the position of the outer wall of the branch pipe 5 close to the plugging component 13; for intercepting the flow through the branch 5.

In this embodiment, when in a high flow state, the stop valve 12 is closed, the movable ring 136 is opened under the action of flow pressure, the fluid passes through the large impeller 3 after passing through the through hole 137, at this time, the large impeller 3 can normally rotate and perform high flow measurement, when in a low flow state, the stop valve 12 is opened, because the fluid can flow through the branch pipe 5, the pressure generated on the movable ring 136 is smaller at this time, the movable ring 136 is not opened under the action of the spring 135, and the fluid completely enters the branch pipe 5 and drives the small impeller 8 to rotate, thereby performing low flow measurement.

Example two

In addition and explanation of the second embodiment, referring to fig. 3 and 4, in the illustration, the plugging assembly 13 includes a fixed ring 131 fixedly connected in the housing 1, a fixed frame 132 is fixedly connected on a side wall of the fixed ring 131, a movable rod 133 is sleeved in the fixed frame 132, one end of the movable rod 133 is fixedly connected with a drop-preventing block 134, a spring 135 is sleeved on an outer wall of the fixed rod between the fixed frame 132 and the drop-preventing block 134, and the other end of the movable rod 133 is fixedly connected with a movable ring 136.

Wherein, a plurality of through holes 137 are arranged on the side wall of the movable ring 136, and the positions of the through holes 137 correspond to the side wall of the fixed ring 131; when the movable ring 136 is restored by the elastic force of the spring 135, the through hole 137 of the movable ring 136 may be blocked by the fixed ring 131, thereby blocking the passage of fluid.

In this embodiment, when the movable ring 136 is in a high flow state, the movable ring 136 is pushed open by the fluid pressure, at this time, the spring 135 is in a compressed state, the fluid passes through the through hole 137 on the movable ring 136, when the movable ring is in a low flow state, the fluid flows to the branch pipe 5, the pressure on the movable ring 136 is small, the movable ring 136 is not enough to push open, the movable ring 136 is attached to one side of the fixed ring 131, the through hole 137 is kept in a closed state, the fluid is blocked, and the whole fluid is ensured to flow into the branch pipe 5.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A low flow turbine flowmeter comprising a housing (1), characterized in that: the novel high-speed hydraulic pump is characterized in that two first bearing seats (2) are fixedly arranged in the shell (1), a large impeller (3) is rotationally connected between the two first bearing seats (2), a branch pipe (5) is fixedly arranged at the bottom of the shell (1), a connecting pipe (6) is fixedly arranged in the middle of the branch pipe (5), two second bearing seats (7) are fixedly arranged in the connecting pipe (6), a small impeller (8) is rotationally connected between the two second bearing seats (7), a display (9) is fixedly arranged on the front surface of the shell (1) and the connecting pipe (6), a display screen (10) is arranged on the front surface of the display (9), a plugging component (13) is fixedly arranged in the shell (1), and the plugging component (13) is positioned between the first bearing seats (2) and the connecting part of the branch pipe (5) and the shell (1).

2. A low flow turbine flow meter as claimed in claim 1, wherein: a plurality of annularly arranged rectifying plates (4) are fixedly arranged on the outer wall of the first bearing seat (2).

3. A low flow turbine flow meter as claimed in claim 1, wherein: a shielding cover (11) positioned at the outer side of the display screen (10) is fixedly arranged at the top of the display (9).

4. A low flow turbine flow meter as claimed in claim 1, wherein: and a stop valve (12) is arranged at the position, close to the plugging assembly (13), of the outer wall of the branch pipe (5).

5. A low flow turbine flow meter as claimed in claim 1, wherein: the plugging assembly (13) comprises a fixed ring (131) fixedly connected inside the shell (1), a fixed frame (132) is fixedly connected to the side wall of the fixed ring (131), a movable rod (133) is sleeved in the fixed frame (132), an anti-falling block (134) is fixedly connected to one end of the movable rod (133), a spring (135) is sleeved on the outer wall of the fixed rod between the fixed frame (132) and the anti-falling block (134), and a movable ring (136) is fixedly connected to the other end of the movable rod (133).

6. A low flow turbine flow meter as in claim 5 wherein: a plurality of through holes (137) are formed in the side wall of the movable ring (136), and the positions of the through holes (137) correspond to the side wall of the fixed ring (131).