CN210426715U - Closed electric commutator - Google Patents
Closed electric commutator Download PDFInfo
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- CN210426715U CN210426715U CN201921465132.6U CN201921465132U CN210426715U CN 210426715 U CN210426715 U CN 210426715U CN 201921465132 U CN201921465132 U CN 201921465132U CN 210426715 U CN210426715 U CN 210426715U
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Abstract
The utility model provides a closed electric commutator, which comprises a bottom plate, a shell, a flow distributing nozzle, a flow guiding hopper in a pants-shaped structure and a motor electrically connected with an external PLC controller, wherein the shell is pants-shaped and is provided with an inlet top cover and two outlet flow channels, and the shell is fixedly supported on the bottom plate through a corner fitting of the waist part after passing through the bottom plate; the flow guide hopper is suspended in the shell through a rotating shaft which is vertically connected to the front side surface and the rear side surface of the flow guide hopper and penetrates through the shell, a partition plate for separating two outlets of the flow guide hopper is vertically arranged in the middle of the flow guide hopper, and each outlet corresponds to one outlet flow channel; the flow distribution nozzle passes through the inlet top cover in the middle, the outlet of the flow distribution nozzle extends into the flow guide hopper, and a gap is reserved between the flow distribution nozzle and the top end of the partition plate; the motor is fixedly arranged on the bottom plate at the front side of the shell and is connected with the rotating shaft through a coupler. The motor is controlled by the PLC to drive the diversion hopper to rotate, the action is stable and reliable, the reversing noise and the vibration of the commutator are effectively reduced, and when fluid passes through the double-underpants type structure with internal movement and external static movement, the splashing is less, the flow fluctuation is small, and the uncertainty is reduced.
Description
Technical Field
The invention belongs to the technical field of liquid flow measurement, and particularly relates to a closed electric commutator which is stable and reliable in control, small in uncertainty, even in fluid distribution, capable of realizing three-photoelectric positioning and fast in commutation time.
Background
Flow metering is an important component of measurement technology. The flow measurement technology plays an important role in energy metering, trade settlement, process control, environmental protection and the like. In recent years, with the implementation of national sustainability development strategy, the fields of energy conservation and emission reduction, environmental protection, resource utilization and the like, higher requirements are put forward on flow measurement technology. Exploring a flow measurement technology capable of adapting to different working conditions, and improving the flow measurement precision becomes an important task for scientific researchers.
In addition to meeting the use requirements, the measuring instrument used in the flow measurement process also needs to consider many other factors, such as flow measurement range, site size, pressure loss size, disturbance resistance, corrosion resistance, explosion prevention, supply period, price and the like. Various types of flow meters have been developed to meet different environmental conditions and to adapt to measurements of different media. Statistically, the types of flowmeters are as many as 100, and each flowmeter has its own specific application.
In order to ensure the uncertainty level of the flowmeter, flow standard devices which can adapt to different media and different uncertainty levels are built in all national measurement supervision and detection scientific research institutes and all flowmeter manufacturers.
The commutator is an important component of the flow standard device, is a necessary device of the flow standard device by a static mass method and a static volume method, and has larger influence on the integral synthesis uncertainty of the device due to the uncertainty. It is generally installed above the working gauge (or container) and serves as the basis for the introduction and discharge of the flow rate of the liquid for each examination by changing the direction of the liquid flow.
At present, traditional commutator is mostly open commutator, is difficult to use in the liquid device that has volatility, and mainly uses compressed gas to carry out reciprocating motion about its reversing mechanism of power supply control, drives the change of liquid flow direction, will detect fluid from the pipeline to interchange the circulation between container and water storage box fast, fully, accurately in the examination time, directly influences flow measurement result's uncertainty to directly influence examination result. Because the gas pressure acting on the reversing mechanism is non-constant pressure, the reversing mechanism has acceleration and hysteresis in action, and the flow metering result is influenced; meanwhile, in order to obtain faster reversing time and smaller reversing travel time difference, a reversing mechanism always bears larger acting force, larger vibration is caused to the whole reverser, and the measurement uncertainty and the service life are influenced.
Therefore, the commutator structure is reasonably designed, and a proper control mode and an accurate timing method are selected, so that the commutator structure is of great importance for reducing the uncertainty of the commutator.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a closed electric commutator which has the characteristics of stable and reliable control, small uncertainty, uniform fluid distribution, three-photoelectric positioning, quick commutation time and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a closed electric commutator, which comprises:
the bottom plate is used for bearing other parts;
the shell is integrally in a pants shape, is provided with an inlet top cover and two outlet flow channels, and is fixedly supported on the bottom plate through a corner piece at the waist part of the bottom plate after penetrating through the bottom plate;
the flow distribution nozzle penetrates through the inlet top cover in the middle and is used for liquid inlet and flow equalization;
the flow guide hopper is suspended in the shell through a rotating shaft which is vertically connected to the front side surface and the rear side surface of the flow guide hopper and penetrates through the shell, and is used for changing the flow direction of liquid and realizing the interchange circulation of the liquid in the two outlet flow channels;
the motor is fixedly arranged on the bottom plate on the front side of the shell, is connected with the rotating shaft through a coupler and is used for driving the diversion bucket to rotate back and forth according to a set angle;
the flow guide hopper is of a pants-shaped structure, a partition plate for separating two outlets of the flow guide hopper is vertically arranged in the middle of the flow guide hopper, and each outlet corresponds to one outlet flow channel; the outlet of the flow distribution nozzle extends into the flow guide hopper, and a gap is reserved between the outlet of the flow distribution nozzle and the top end of the partition plate; the motor is electrically connected with an external PLC controller. The motor is used as a transmission source, the rotation angle of the motor is set in a control program through the PLC, so that the diversion hopper is driven to rotate in the set angle, the action is stable and reliable, the reversing noise and vibration of the commutator are effectively reduced, when fluid passes through a double-underpants type structure with internal movement and external static, splashing is less, flow fluctuation is small, and uncertainty is reduced; through the test of a flowmeter method in the calibration regulation of a liquid flow standard device, the uncertainty of the commutator is better than 0.05 percent.
Further, shaft sleeves are symmetrically arranged on the front side and the rear side of the flow guide hopper, through holes corresponding to the shaft sleeves are symmetrically formed in the front side and the rear side of the shell, and the rotating shaft is fixedly connected with the shaft sleeves and then penetrates through the through holes to be rotatably connected with bearings with seats fixed on the bottom plate. The flow guide hopper is arranged on the rotating shaft, the rotating shaft is arranged on the rotating shaft, and the rotating shaft is arranged on the rotating shaft.
Furthermore, the rotating shaft at the rear side of the shell is fixedly connected with three sensing pieces which are arranged at intervals, each sensing piece corresponds to one photoelectric switch, and the photoelectric switches are arranged on the bottom plate and electrically connected with the PLC.
Further, the induction sheets are perpendicular to the rotating shaft and are arranged along the rotating shaft in a staggered mode in the radial direction.
Further, two of the three photoelectric switches are located on the same side of the rotating shaft.
Furthermore, the outlet of the flow distribution nozzle is arranged in a prolate shape, and the length-width ratio of the outlet is 9: 1-14: 1. The fluid distribution is more uniform within the range, and the influence on the uncertainty of the flow is also minimum.
Further, the outlet of the flow distribution nozzle is arranged to be flat and long, and the length-width ratio of the outlet of the flow distribution nozzle is 10: 1.
Further, the motor is a stepping motor.
According to the technical scheme, the general working principle of the invention is as follows:
after liquid enters the flow distribution nozzle to finish flow equalization, the PLC controls the motor to drive the flow guide hopper to deflect, is positioned and limited by the photoelectric switch, and then flows into the container or the water storage tank from an outlet on one side of the flow guide hopper through an outlet flow channel of the shell.
Therefore, the commutator takes the motor as a transmission source, the motor is controlled by the PLC to drive the diversion bucket to rotate, the commutation time is short, the action is stable and reliable, the fluid is uniformly distributed, the flow fluctuation is small, the uncertainty is small, and the automatic positioning, resetting and secondary protection of the commutator are realized by utilizing the three photoelectric switches.
Through the technical scheme and the combination of the working principle of the invention, the important beneficial effects of the invention can be summarized as follows:
1. the motor is used as a transmission source, the rotation angle of the motor is set in a control program through the PLC, so that the diversion hopper is driven to rotate in the set angle, the action is stable and reliable, the reversing noise and vibration of the commutator are effectively reduced, when fluid passes through a double-underpants type structure with internal movement and external static, splashing is less, flow fluctuation is small, and uncertainty is reduced;
2. through the test of a flowmeter method in the calibration regulation of a liquid flow standard device, the uncertainty of the commutator is better than 0.05 percent;
3. the flow guide hopper is prevented from interfering with the shell when rotating back and forth according to a set angle by forming a support structure of the flow guide hopper through the bearing with the seat and the rotating shaft, so that vibration is prevented from being transmitted to the shell when the flow guide hopper rotates, and the influence of the flow guide hopper on the uncertainty of the flow is reduced;
4. when the motor drives the diversion hopper to rotate, the photoelectric switches positioned on the two sides of the rotating shaft can respectively limit the left-right rotating angle of the diversion hopper, so that the diversion hopper is prevented from being impacted with the shell in excessive rotation, the automatic positioning and resetting functions of the commutator are realized, and the secondary protection function on the whole commutator is realized, so that the whole commutator can safely and stably operate for a long time;
5. based on the three arranged photoelectric switches, no matter how the initial position of the diversion bucket is, the action of reversing the diversion bucket after rotating does not influence the uncertainty of the flow, the diversion bucket rotates quickly, and the rotation time of the diversion bucket is less than 4 ms;
6. after the fluid passes through the flow distribution nozzle with the outlet length-width ratio of 9:1 to 14:1, the distribution of the fluid is more uniform, and the influence on the uncertainty of the flow is also minimized.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic sectional view taken along line A-A in FIG. 2;
FIG. 4 is a schematic perspective view of the housing (with the inlet cover and corner fittings removed);
FIG. 5 is a front view of the diverter nozzle;
FIG. 6 is a left side view of the diverter nozzle;
FIG. 7 is a front view of the diversion hopper;
FIG. 8 is a left side view of the scoop;
fig. 9 is a sectional view taken along line B-B in fig. 7.
The reference numerals are explained below:
1: a bottom plate 2: shell body
21: inlet header 22: outlet flow passage
23: corner fitting 24: through hole
3: the flow distribution nozzle 4: flow guide hopper
41: separator 42: shaft sleeve
5: a rotating shaft 6: electric machine
7: the seated bearing 8: induction sheet
9: the photoelectric switch 10: and (4) a flange.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 9, the present invention provides a closed electric commutator, which has the characteristics of stable and reliable control, small uncertainty, uniform fluid distribution, three-photoelectric positioning, fast commutation time, etc., and specifically comprises:
the bottom plate 1 is used for bearing other parts;
the shell 2 is integrally in a pants shape, is provided with an inlet top cover 21 and two outlet flow channels 22, and is fixedly supported on the bottom plate 1 through a corner piece 23 at the waist part of the bottom plate 1 after penetrating through the bottom plate 1;
the flow distribution nozzle 3 passes through the inlet top cover 21 in the middle and is used for liquid inlet and flow equalization;
the flow guide hopper 4 is suspended in the shell 2 through a rotating shaft 5 which is vertically connected to the front side surface and the rear side surface of the flow guide hopper and penetrates through the shell 2, and is used for changing the flow direction of liquid and realizing the interchange circulation of the liquid in the two outlet flow channels 22;
the motor 6 is fixedly arranged on the bottom plate 1 at the front side of the shell 2, is connected with the rotating shaft 5 through a coupler and is used for driving the diversion hopper 4 to rotate back and forth according to a set angle;
the diversion hopper 4 is of a pants-shaped structure, a partition plate 41 for separating two outlets of the diversion hopper is vertically arranged in the middle of the diversion hopper, and each outlet corresponds to one outlet flow channel 22; the outlet of the flow distribution nozzle 3 extends into the flow guide hopper 4 and has a gap with the top end of the clapboard 41; the motor 6 is electrically connected with an external PLC (not shown in the figure). The motor is used as a transmission source, the rotation angle of the motor is set in a control program through the PLC, so that the diversion hopper is driven to rotate in the set angle, the action is stable and reliable, the reversing noise and vibration of the commutator are effectively reduced, when fluid passes through a double-underpants type structure with internal movement and external static, splashing is less, flow fluctuation is small, and uncertainty is reduced; through the test of a flowmeter method in the calibration regulation of a liquid flow standard device, the uncertainty of the commutator is better than 0.05 percent. In the present embodiment, the motor 6 is a stepping motor.
Specifically, shaft sleeves 42 are symmetrically arranged on the front side and the rear side of the diversion hopper 4, through holes 24 corresponding to the shaft sleeves 42 are symmetrically formed in the front side and the rear side of the shell 2, and the rotating shaft 5 is fixedly connected with the shaft sleeves 42, penetrates through the through holes 24 and is rotatably connected with a bearing with a seat 7 fixed on the bottom plate 1. This design forms a structure that supports water conservancy diversion fill 4 for water conservancy diversion fill 4 does not take place to interfere with casing 2 when making a round trip to rotate according to the angle of settlement, thereby has avoided water conservancy diversion fill 4 to the transmission vibration of casing 2 when rotating, has reduced its influence to the flow uncertainty itself.
The rotating shaft 5 positioned at the rear side of the shell 2 is fixedly connected with three sensing pieces 8 which are arranged at intervals, each sensing piece 8 corresponds to one photoelectric switch 9, and the photoelectric switches 9 are arranged on the bottom plate 1 and are electrically connected with the PLC; the sensing pieces 8 are perpendicular to the rotating shaft 5 and are arranged along the rotating shaft 5 in a staggered mode in the radial direction, namely the three sensing pieces 8 are not located in the same radial direction of the rotating shaft 5, and therefore only one photoelectric switch 9 sends out a sensing signal when the rotating shaft 5 rotates to a set position. In the present embodiment, two of the three photoelectric switches 9 are located on the same side of the rotating shaft 5. When the motor drives the diversion hopper to rotate, the photoelectric switches positioned on the two sides of the rotating shaft can respectively limit the left-right rotating angle of the diversion hopper, so that the diversion hopper is prevented from being impacted with the shell in excessive rotation, the automatic positioning and resetting functions of the commutator are realized, and the secondary protection function on the whole commutator is realized, so that the whole commutator can safely and stably operate for a long time; meanwhile, based on the three photoelectric switches, a flowmeter test method shows that the timing effects of the initial position of the diversion bucket starting to rotate at the left side and the right side of the diversion nozzle and the middle position of the diversion nozzle are the same, namely the uncertainty of the test result of the commutator stroke difference method is better than 0.05%, and the rotation time of the diversion bucket is lower than 4ms, namely that the rotation of the diversion bucket can not influence the uncertainty of the flow no matter how the initial position is, and the action of completing the diversion can not be influenced.
The outlet of the flow distribution nozzle 3 is arranged in a prolate shape, and through deep research on fluid distribution of a flow distribution nozzle 3 structure by finite element analysis software CFD and ANSYS, the length-width ratio of the outlet is preferably 9:1 to 14:1, the fluid distribution is more uniform in the range, the influence on the uncertainty of the flow is also minimum, and the optimal length-width ratio is 10: 1.
The specific working principle of the commutator is as follows:
as shown in fig. 1, the flow distribution nozzle 3 is connected with a liquid inlet pipeline (not shown in the figure) through a flange 10, one outlet flow passage 22 of the shell 2 is suspended and extends into a container (not shown in the figure), and the other outlet flow passage 22 is externally connected with a water storage tank (not shown in the figure), so that the shell 2 is closed front and back to form a closed commutator;
liquid enters the interior of the flow distribution nozzle 3 from a liquid inlet pipeline, is guided by the flow distribution nozzle 3 and then enters the flow guide hopper 4; the diversion hopper 4 is driven by the motor 6 to rotate and stops at a limit point after the limit of the photoelectric switch 9, at the moment, liquid flows into the container from an outlet flow channel 22 of the shell 2, the time for flowing into the container is different according to different use conditions, and the flow is assumed to flow for 1 minute;
when the liquid flows into the container from the diversion hopper 4 for 1 minute, the program can simultaneously give a running signal to the motor 6 at the same time, so that the motor 6 reversely rotates for 20 degrees at the current position, the rotation angle is a corresponding rotation angle preset in the program for the running steering of the motor 6, the limit protection is finished by the photoelectric switch 9, and the secondary protection effect on the whole commutator is achieved, because the diversion hopper 4 rotates very fast, the rotation finishing time is only about 4ms, the upper liquid flow continuously flows downwards at the moment, because the diversion hopper 4 rapidly finishes the rotation action, the liquid flow is almost simultaneously and instantly switched from an outlet at one side of the diversion hopper 4 to an outlet at the other side of the diversion hopper 4, flows out to another outlet flow passage 22 of the shell 2 through an outlet flow passage 22 of the shell 2, and then flows to an external water storage tank through another outlet flow passage 22 of the shell 2. By this point, the device has completed one operational state.
The invention has the advantages that the fluid is uniformly distributed, the uncertainty of the flow is reduced, the diversion bucket is driven to act by the motor, and the control is stable and reliable and the reversing time is fast by the PLC control and the three-photoelectric positioning and limiting dual protection.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A closed-type electric commutator, comprising:
the bottom plate (1) is used for bearing parts;
the shell (2) is integrally in a pants shape, is provided with an inlet top cover (21) and two outlet flow channels (22), and is fixedly supported on the bottom plate (1) through a corner piece (23) at the waist part of the bottom plate (1) after penetrating through the bottom plate (1);
the flow distribution nozzle (3) passes through the inlet top cover (21) in the center and is used for feeding liquid and equalizing flow;
the flow guide hopper (4) is suspended in the shell (2) through a rotating shaft (5) which is vertically connected to the front side surface and the rear side surface of the flow guide hopper and penetrates through the shell (2) and is used for changing the flow direction of liquid and realizing the exchange and circulation of the liquid in the two outlet flow channels (22);
the motor (6) is fixedly arranged on the bottom plate (1) on the front side of the shell (2), is connected with the rotating shaft (5) through a coupler and is used for driving the flow guide hopper (4) to rotate back and forth according to a set angle;
the flow guide hopper (4) is of a pants-shaped structure, a partition plate (41) for separating two outlets of the flow guide hopper is vertically arranged in the middle of the flow guide hopper, and each outlet corresponds to one outlet flow channel (22); the outlet of the flow distribution nozzle (3) extends into the flow guide hopper (4) and has a gap with the top end of the partition plate (41); the motor (6) is electrically connected with an external PLC controller.
2. The closed electric commutator recited in claim 1, wherein the front and rear sides of the flow guide hopper (4) are symmetrically provided with shaft sleeves (42), the front and rear sides of the housing (2) are symmetrically provided with through holes (24) corresponding to the shaft sleeves (42), and the rotating shaft (5) is fixedly connected with the shaft sleeves (42) and then passes through the through holes (24) to be rotatably connected with the bearings (7) with seats fixed on the base plate (1).
3. The closed electric commutator according to claim 1 or 2, wherein three sensing pieces (8) arranged at intervals are fixedly connected to the rotating shaft (5) at the rear side of the housing (2), each sensing piece (8) corresponds to one photoelectric switch (9), and the photoelectric switches (9) are installed on the bottom plate (1) and electrically connected with the PLC controller.
4. A closed-type electric commutator according to claim 3, characterized in that the induction segments (8) are arranged perpendicularly to the rotor shaft (5) and radially offset along the rotor shaft (5).
5. A closed-type electric commutator as claimed in claim 3, characterized in that two of the three photoelectric switches (9) are located on the same side of the rotor shaft (5).
6. The closed electric commutator of claim 1, wherein the outlet of the flow distribution nozzle (3) is arranged in an oblong shape, and the length-width ratio of the outlet is in a range of 9: 1-14: 1.
7. The closed electric commutator of claim 6, wherein the outlet aspect ratio of the flow divider nozzle (3) is 10: 1.
8. Closed-end electrodynamic commutator according to claim 1, characterized in that the motor (6) is a stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921465132.6U CN210426715U (en) | 2019-09-04 | 2019-09-04 | Closed electric commutator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921465132.6U CN210426715U (en) | 2019-09-04 | 2019-09-04 | Closed electric commutator |
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| Publication Number | Publication Date |
|---|---|
| CN210426715U true CN210426715U (en) | 2020-04-28 |
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| CN201921465132.6U Active CN210426715U (en) | 2019-09-04 | 2019-09-04 | Closed electric commutator |
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| CN (1) | CN210426715U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595582A (en) * | 2019-09-04 | 2019-12-20 | 成都赫泰智能科技有限公司 | Closed electric commutator |
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2019
- 2019-09-04 CN CN201921465132.6U patent/CN210426715U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595582A (en) * | 2019-09-04 | 2019-12-20 | 成都赫泰智能科技有限公司 | Closed electric commutator |
| CN110595582B (en) * | 2019-09-04 | 2024-08-13 | 成都洛丁森智能科技有限公司 | Closed electric commutator |
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Address after: 610000 building 3, No. 228, Nansi Road, economic development zone, Chengdu Economic and Technological Development Zone, Sichuan Province (Longquanyi District) Patentee after: Chengdu luodingsen Intelligent Technology Co.,Ltd. Address before: 610100 No. 4-2, floor 3, building D2, No. 1666, second section of Chenglong Avenue, Chengdu Economic and Technological Development Zone (Longquanyi District), Sichuan Province Patentee before: CHENGDU HETAI INTELLIGENT TECHNOLOGY Co.,Ltd. |
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