CN108387280B - Anti-seize rotary piston flowmeter - Google Patents
Anti-seize rotary piston flowmeter Download PDFInfo
- Publication number
- CN108387280B CN108387280B CN201810144622.XA CN201810144622A CN108387280B CN 108387280 B CN108387280 B CN 108387280B CN 201810144622 A CN201810144622 A CN 201810144622A CN 108387280 B CN108387280 B CN 108387280B
- Authority
- CN
- China
- Prior art keywords
- rotary piston
- shaft
- inner cylinder
- elastic
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012535 impurity Substances 0.000 claims abstract description 54
- 230000000452 restraining effect Effects 0.000 claims abstract description 30
- 210000004907 gland Anatomy 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 38
- 238000007599 discharging Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 description 8
- 239000013013 elastic material Substances 0.000 description 6
- 238000005192 partition Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
- G01F11/12—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements
- G01F11/20—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
- G01F11/12—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements
- G01F11/20—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates
- G01F11/22—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates for liquid or semiliquid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses an anti-seize rotary piston flowmeter, comprising: the device comprises a piston outer core with an annular metering cavity, a rotary piston, a gland and a signal acquisition device, wherein an elastic constraint device for elastically constraining the rotary track of the rotary piston in the annular metering cavity is arranged in the annular metering cavity, and the elastic constraint device can constrain the rotary track of the rotary piston when the rotary piston is only driven by torque, so that the rotary piston rotates in the annular metering cavity according to the constrained rotary track; when the rotary piston is driven by torque and the interference force formed by the obstruction of impurities, the elastic restraining device can release the restraint of the rotary piston rotation track until the interference force disappears. The anti-blocking rotary piston flowmeter with the structure effectively avoids the phenomenon that the rotary piston is blocked on the basis of ensuring the high metering precision of the rotary piston flowmeter, and greatly reduces the fault rate of the rotary piston flowmeter.
Description
Technical Field
The invention relates to a flowmeter, in particular to an anti-blocking rotary piston flowmeter.
Background
The rotary piston flowmeter is a positive displacement flowmeter and is mainly used for measuring the flow of fluids such as liquid, gas and the like. The current common rotary piston flowmeter comprises a piston outer core, a rotary piston, a gland and a signal acquisition device, wherein the piston outer core consists of an outer cylinder body, an inner cylinder body, a bottom plate and a separation plate, the bottom plate is covered at the bottom of the outer cylinder body, the inner cylinder body is arranged in the outer cylinder body, a gap between the inner cylinder body and the outer cylinder body forms a ring-shaped metering cavity with the bottom closed, the separation plate is positioned in the ring-shaped metering cavity, two side edges and the bottom edge of the separation plate are respectively in sealing connection with the outer side wall of the inner cylinder body, the inner side wall of the outer cylinder body and the bottom plate, a fluid inlet and a fluid outlet are arranged on the bottom plate positioned at the bottom of the ring-shaped metering cavity, and the fluid inlet and the fluid outlet are respectively positioned at two sides of the separation plate. An open slot is vertically formed in the side wall of the rotary piston, the rotary piston is arranged in the annular metering cavity, the partition plate is clamped in the open slot of the rotary piston, the rotary piston can rotate in the annular metering cavity relative to the partition plate, the rotary piston and the partition plate separate the fluid inlet from the fluid outlet, and the rotary piston is covered in the piston outer core in a sealing mode through the gland. When the rotary piston is driven by the torque to rotate in the annular metering cavity, the revolution of the rotary piston is in direct proportion to the liquid flow flowing through the rotary piston flowmeter, so that the liquid flow flowing through the rotary piston flowmeter can be calculated by collecting the revolution of the rotary piston through the signal collecting device. In the use process of the rotary piston flowmeter with the structure, the rotary track of the rotary piston in the annular metering cavity is not restricted, so that the rotary track of the rotary piston in the annular metering cavity is greatly influenced by fluid flow, pressure and the like, the phenomenon that the rotary piston floats in the annular metering cavity is easy to occur, and the metering precision of the rotary piston flowmeter can be greatly reduced.
At present, a rotary piston flowmeter for restraining a rotary track of a rotary piston is also disclosed, for example, a chinese patent application with patent number 200820048175X and a chinese patent application with patent number 2014204031038 both disclose a rotary piston flowmeter with a rigid restraint device, and the structure of the rigid restraint device is as follows: the fixed shaft is fixedly arranged in the piston outer core, the central shaft is arranged at the axial center of the rotary piston, the central shaft is attached to the side wall of the fixed shaft to rotate when the rotary piston rotates in the annular metering cavity, the rotary track of the rotary piston in the annular metering cavity is restrained by the cooperation of the fixed shaft and the central shaft, when the rotary piston is driven by torque, the outer side wall of the rotary piston is attached to the inner side wall of the outer cylinder to rotate, and the inner side wall of the rotary piston is attached to the outer side wall of the inner cylinder to rotate. The disadvantages of such a rotary piston flowmeter with rigid restraining means are: in the actual use process, impurities are inevitably present in the liquid, and the impurities are easy to clamp between the outer side wall of the rotary piston and the inner side wall of the outer cylinder body and between the inner side wall of the rotary piston and the outer side wall of the inner cylinder body, so that the rotary piston is clamped and cannot normally rotate.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: provided is an anti-seize rotary piston flowmeter which has high measuring precision and can avoid the phenomenon of seizing of a rotary piston.
In order to solve the problems, the invention adopts the following technical scheme: the anti-seize rotary piston flowmeter comprises: the piston outer core with the annular metering cavity, the rotary piston, the gland and the signal acquisition device can adopt various types of signal acquisition devices according to actual demands in the actual process, and the positions of the signal acquisition devices in the rotary piston flowmeter are set according to different types of signal acquisition devices, so that the rotary piston flowmeter belongs to mature technology in the flowmeter field, and the rotary piston flowmeter is not specifically described. An elastic restraining device for elastically restraining the rotation track of the rotary piston in the annular metering cavity is arranged in the annular metering cavity, and the elastic restraining device can restrain the rotation track of the rotary piston when the rotary piston is driven by torque only, so that the rotary piston rotates in the annular metering cavity according to the restrained rotation track; when the rotary piston is driven by torque and the interference force formed by the obstruction of impurities, the elastic restraining device can release the restraint of the rotary piston rotation track until the interference force disappears.
Further, the anti-blocking rotary piston flowmeter further comprises a base, a containing cavity recessed downwards is formed in the base, a fluid input channel and a fluid output channel are formed in the bottom of the containing cavity, the outer piston core is fixedly arranged in the containing cavity, the gland covers the outer piston core in the containing cavity in a sealing mode, a fluid inlet at the bottom of the outer piston core is communicated with the fluid input channel, and a fluid outlet at the bottom of the outer piston core is communicated with the fluid output channel.
Further, the anti-blocking rotary piston flowmeter has the structure that: an inner cylinder body is arranged in the annular metering cavity, a sliding shaft is inserted into the inner cylinder body and can slide up and down in the inner cylinder body, one end of a tension spring is fixedly connected with the sliding shaft, the other end of the tension spring is fixedly connected with the inner cylinder body, the sliding shaft is positioned at an upper limit position under the action of elasticity of the tension spring, and an adjusting gap is reserved between the bottom of the sliding shaft and the bottom of the inner cylinder body; a guide shaft with gradually increased diameter from top to bottom is arranged at the top of the sliding shaft, a central shaft is arranged at the axial center position of the rotary piston, and the central shaft extends downwards into the inner cylinder body; when the rotary piston is driven by torque only, the central shaft is attached to the side wall of the guide shaft to rotate under the action of the elasticity of the tension spring, and the rotary piston rotates in the annular metering cavity according to the restraining rotation track; when the rotary piston is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the sliding shaft to slide downwards against the elasticity of the tension spring, so that the rotary piston is deviated to give away the impurity discharging distance.
Further, the anti-blocking rotary piston flowmeter is characterized in that a limiting shaft shoulder is arranged on the sliding shaft, an outwards protruding limiting block is arranged on the inner side wall of the inner cylinder body above the limiting shaft shoulder, the sliding shaft is sleeved with the stretching spring, one end of the stretching spring abuts against the limiting shaft shoulder, the other end of the stretching spring is fixedly connected with the inner cylinder body, the limiting shaft shoulder abuts against the limiting block under the action of elasticity of the stretching spring, and an adjusting gap is reserved between the bottom of the sliding shaft and the bottom of the inner cylinder body.
The elastic restraint device is not limited to the above structure, and the structure of the elastic restraint device may also adopt the following structure: an inner cylinder body is arranged in the annular metering cavity, a sliding shaft is arranged in the inner cylinder body in a penetrating way, the sliding shaft can slide up and down in the inner cylinder body, one end of an extension spring is fixedly connected with the sliding shaft, the other end of the extension spring is propped against the bottom of the accommodating cavity, the sliding shaft is positioned at an upper limit under the action of elasticity of the extension spring, and an adjusting gap is reserved between the bottom of the sliding shaft and the bottom of the accommodating cavity; a guide shaft with gradually increased diameter from top to bottom is arranged at the top of the sliding shaft, a central shaft is arranged at the axial center position of the rotary piston, and the central shaft extends downwards into the inner cylinder body; when the rotary piston is driven by torque only, the central shaft is attached to the side wall of the guide shaft to rotate under the action of the elasticity of the tension spring, and the rotary piston rotates in the annular metering cavity according to the restraining rotation track; when the rotary piston is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the sliding shaft to slide downwards against the elasticity of the tension spring, so that the rotary piston is deviated to give away the impurity discharging distance.
Further, the anti-blocking rotary piston flowmeter is characterized in that a limiting shaft shoulder is arranged on the sliding shaft, an outwards protruding limiting block is arranged on the inner side wall of the inner cylinder body above the limiting shaft shoulder, the sliding shaft is sleeved with the stretching spring, one end of the stretching spring abuts against the limiting shaft shoulder, the other end of the stretching spring abuts against the bottom of the accommodating cavity, the limiting shaft shoulder abuts against the limiting block under the action of elasticity of the stretching spring, and an adjusting gap is reserved between the bottom of the sliding shaft and the bottom of the accommodating cavity.
The elastic restraint device is not limited to the above structure, and the structure of the elastic restraint device may also adopt the following structure: an inner cylinder body is arranged in the annular metering cavity, an elastic shaft made of elastic materials is fixedly arranged in the inner cylinder body, a central shaft is arranged at the axial center position of the rotary piston, and the central shaft extends downwards into the inner cylinder body; when the rotary piston is driven by torque only, the central shaft is attached to the side wall of the elastic shaft to rotate, and the rotary piston rotates in the annular metering cavity according to the restraint rotation track; when the rotary piston is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the elastic shaft stress area to elastically deform, so that the rotary piston is deviated to give away the impurity discharge distance.
Further, the anti-seize rotary piston flowmeter is characterized in that the elastic shaft is composed of an upper section elastic shaft and a lower section elastic shaft, the diameter of the upper section elastic shaft is smaller than that of the lower section elastic shaft, a step surface is formed between the upper section elastic shaft and the lower section elastic shaft, and a limiting block protruding outwards is arranged on the inner side wall of the inner cylinder body above the step surface; when the rotary piston is driven by torque only, the central shaft is attached to the side wall of the upper elastic shaft to rotate, and the rotary piston rotates in the annular metering cavity according to the restraining rotation track; when the rotary piston is driven by torque and is blocked by impurities, the interference force can force the stress area of the upper elastic shaft to elastically deform, so that the rotary piston is deviated to give away the impurity discharging distance.
The elastic restraint device is not limited to the above structure, and the structure of the elastic restraint device may also adopt the following structure: an inner cylinder body is arranged in the annular metering cavity, a first step hole is formed in the upper section of the inner cylinder body, the diameter of the first step hole is larger than that of the inner wall of the inner cylinder body, an elastic eccentric ring made of elastic materials is arranged in the first step hole, the elastic eccentric ring can rotate around the axis of the first step hole in the first step hole, a central shaft is arranged at the axis position of the rotary piston and extends into the eccentric hole of the elastic eccentric ring, and when the rotary piston is driven by torque only, the central shaft pushes the eccentric ring to rotate and enables the rotary piston to rotate in the annular metering cavity according to a restraint rotation track; when the rotary piston is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the stress area of the eccentric hole to elastically deform, so that the rotary piston is deviated to give away the impurity discharge distance.
The elastic restraint device is not limited to the above structure, and the structure of the elastic restraint device may also adopt the following structure: an inner cylinder body is arranged in the annular metering cavity, a limiting shaft is fixedly arranged in the inner cylinder body, an elastic central shaft made of elastic materials is arranged at the axial center position of the rotary piston, the elastic central shaft stretches downwards into the inner cylinder body, when the rotary piston is driven by torque only, the elastic central shaft is attached to the side wall of the limiting shaft to rotate, and the rotary piston rotates in the annular metering cavity according to a restraining rotation track; when the rotary piston is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the elastic central shaft stress area to elastically deform, so that the rotary piston is deviated to give away the impurity discharge distance.
Further, the anti-blocking rotary piston flowmeter is characterized in that the limiting shaft consists of an upper-section limiting shaft and a lower-section limiting shaft, and the diameter of the upper-section limiting shaft is smaller than that of the lower-section limiting shaft; when the rotary piston is driven by torque only, the elastic central shaft is jointed with the side wall of the upper section elastic shaft to rotate, and the rotary piston rotates in the annular metering cavity according to the restraining rotation track; when the rotary piston is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the elastic central shaft stress area to elastically deform, so that the rotary piston is deviated to give away the impurity discharge distance.
The beneficial effects of the invention are as follows: on the basis of guaranteeing high metering accuracy of the rotary piston flowmeter, the phenomenon of locking of the rotary piston is effectively avoided, and the fault rate of the rotary piston flowmeter is greatly reduced.
Drawings
Fig. 1 is a schematic view of a second embodiment of an anti-seize rotary piston flowmeter according to the invention.
Fig. 2 is an exploded view of a second embodiment of an anti-seize rotary piston flowmeter according to the present invention.
Fig. 3 is a schematic diagram of the structure of the rotary piston and the piston outer core in the top view of fig. 1.
Fig. 4 is a schematic view of a structure in which the sliding shaft in fig. 1 releases the restriction of the rotation locus of the rotary piston.
Fig. 5 is a schematic structural view of a fourth embodiment of an anti-seize rotary piston flowmeter according to the present invention.
Fig. 6 is a schematic view of the structure in which the elastic shaft in fig. 5 releases the restriction of the rotation locus of the rotary piston.
Fig. 7 is a schematic view of a fifth embodiment of an anti-seize rotary piston flowmeter according to the invention.
Fig. 8 is a schematic diagram of the top view of the rotary piston and the piston outer core of fig. 7.
Fig. 9 is a schematic view of the structure in which the elastic eccentric ring in fig. 7 releases the restriction of the rotation locus of the rotary piston.
Fig. 10 is a schematic structural view of a sixth embodiment of an anti-seize rotary piston flowmeter according to the present invention.
Fig. 11 is a schematic view of the structure in which the elastic center shaft in fig. 10 releases the restriction on the rotation locus of the rotary piston.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings and the preferred embodiments.
Example 1
Referring to fig. 1, 2 and 3, an anti-seize rotary piston flowmeter according to the present embodiment includes: the piston outer core 1, the rotary piston 2, the gland 3 and the signal acquisition device are of a mature technology in the field of flow meters, and detailed description thereof is omitted. The rotary piston 2 may be a C-type rotary piston or an H-type rotary piston, and for convenience of description, the embodiment will be described by taking the C-type rotary piston as an example. The piston outer core 1 is composed of an outer cylinder 11, an inner cylinder 12, a bottom plate 13 and a separation plate 14, wherein the bottom plate 13 is covered at the bottom of the outer cylinder 11, the inner cylinder 12 is arranged in the outer cylinder 11, a gap between the inner cylinder 12 and the outer cylinder 11 forms an annular metering cavity 10 with the bottom closed, the separation plate 14 is positioned in the annular metering cavity 10, and two side edges and the bottom edge of the separation plate 14 are respectively connected with the outer side wall of the inner cylinder, the inner side wall of the outer cylinder and the bottom plate 13 in a sealing way. A fluid inlet 15 and a fluid outlet 16 are arranged on a bottom plate 13 positioned at the bottom of the annular metering cavity 10, the fluid inlet 15 and the fluid outlet 16 are respectively positioned at two sides of a separation plate 14, and a gland 3 seals and covers the rotary piston 2 in the piston outer core 1. An open slot 21 is vertically formed in the side wall of the rotary piston 2, the rotary piston 2 is arranged in the annular metering cavity 10, the partition plate 14 is clamped in the open slot 21 of the rotary piston 2, the rotary piston 2 can rotate in the annular metering cavity 10 relative to the partition plate 14, and the rotary piston 2 and the partition plate 14 separate the fluid inlet 15 from the fluid outlet 16. An elastic restraining device is arranged in the inner cylinder 12 for elastically restraining the rotation track of the rotary piston in the annular metering cavity 10, and the elastic restraining device can restrain the rotation track of the rotary piston 2 when the rotary piston 2 is driven by torque only, so that the rotary piston 2 rotates in the annular metering cavity 10 according to the restrained rotation track even if the outer side wall of the rotary piston 2 is jointed with the inner side wall of the outer cylinder 11 to rotate and the inner side wall of the rotary piston 2 is jointed with the outer side wall of the inner cylinder 12 to rotate. When the rotary piston 2 is subjected to a disturbance force caused by torque driving and foreign matter blocking, the disturbance force can cause the elastic restraining means to release the restraint of the rotary locus of the rotary piston 2 until the disturbance force disappears.
Referring to fig. 1 and 4, the elastic restraint device in this embodiment has the following structure: the sliding shaft 5 is arranged in the inner cylinder 12 in a penetrating way, the sliding shaft 5 can slide up and down in the inner cylinder 12, one end of the stretching spring 6 is fixedly connected with the sliding shaft 5, the other end of the stretching spring 6 is fixedly connected with the inner cylinder 12, the sliding shaft 5 is positioned at an upper limit position under the action of the elasticity of the stretching spring 6, an adjusting gap is reserved between the bottom of the sliding shaft 5 and the bottom of the inner cylinder 12, and the adjusting gap provides a movement space for the sliding shaft 5 to move downwards against the elasticity of the stretching spring 6. The top of the sliding shaft 5 is provided with a guide shaft 52 with gradually increased diameter from top to bottom, and the guide shaft 52 can be of a conical structure or a truncated cone structure. A central shaft 22 is provided at the axial center of the rotary piston 2, and the central shaft 22 extends downward into the inner cylinder 12. When the rotary piston 2 is driven by torque only, the central shaft 22 is attached to the side wall of the guide shaft 52 to rotate under the action of the elasticity of the tension spring 6, and the rotary piston 2 rotates in the annular metering cavity 10 according to the restraining rotation track; when the rotary piston 2 is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the sliding shaft 5 to slide downwards against the elastic force of the tension spring 6, so that the rotary piston 2 is deviated to give away the impurity discharging distance.
In this embodiment, the connection manner between the extension spring 6 and the sliding shaft 5 may be the above-mentioned fixed connection, or the sliding shaft 5 may be provided with a limiting shaft shoulder 51, and an outwardly protruding limiting block 121 is disposed on the inner sidewall of the inner cylinder 12 above the limiting shaft shoulder 51, where the limiting block 121 may be an annular limiting block. The extension spring 6 is sleeved on the sliding shaft 5, one end of the extension spring 6 abuts against the limiting shaft shoulder 51, the other end of the extension spring 6 is fixedly connected with the inner cylinder 12, the limiting shaft shoulder 51 abuts against the limiting block 121 under the action of elasticity of the extension spring 6, and an adjusting gap is reserved between the bottom of the sliding shaft 5 and the bottom of the inner cylinder 12.
When the rotary piston 2 is driven to rotate in the annular metering cavity 10 only by torque under the action of differential pressure of fluid inlet and outlet during operation, as shown in fig. 3, the central shaft 22 is jointed with the side wall of the guide shaft 52 to rotate under the action of the elasticity of the extension spring 6, the rotary piston 2 rotates in the annular metering cavity 10 according to a restraint rotation track, at the moment, the rotation track of the rotary piston 2 is restrained through the cooperation of the guide shaft 52 and the central shaft 22, and when the central shaft 22 rotates along the side wall of the guide shaft 52, the outer side wall of the rotary piston 2 is jointed with the inner side wall of the outer cylinder 11 to rotate and the inner side wall of the rotary piston 2 is jointed with the outer side wall of the inner cylinder 12 to rotate. Referring to fig. 4, when the rotary piston 2 is driven by torque and the interference force generated by the interference of the impurities, the interference force can force the sliding shaft 5 to slide downwards against the elastic force of the tension spring 6, so that the rotary piston 2 is deviated to give away the impurity discharging distance, namely, the constraint of the rotary track of the rotary piston 2 is released, the rotary piston 2 which rotates tangentially to the inner cylinder 12 and the outer cylinder 11 respectively can smoothly bypass the impurities, when the rotary piston 2 smoothly bypasses the impurities or the impurities are washed away by the fluid, the interference force applied to the rotary piston 2 disappears, and the tension spring 6 rapidly enables the sliding shaft 5 to move upwards to return to the original position under the elastic force, and at the moment, the rotary track of the rotary piston 2 can be restrained through the cooperation of the guide shaft 52 and the central shaft 22.
Example two
As shown in fig. 1, 2, 3 and 4, the present embodiment is different from the first embodiment in that:
the anti-blocking rotary piston flowmeter in this embodiment further includes a base 4, a containing cavity recessed downward is provided on the base 4, a fluid input channel 41 and a fluid output channel 42 are provided at the bottom of the containing cavity, the piston outer core 1 is fixedly disposed in the containing cavity, the gland 3 covers the piston outer core 1 in the containing cavity in a sealing manner, the fluid inlet 15 at the bottom of the piston outer core 1 is communicated with the fluid input channel 41, and the liquid outlet 16 at the bottom of the piston outer core 1 is communicated with the fluid output channel 42.
The elastic restraint device in this embodiment has the following structure: the sliding shaft 5 is arranged in the inner cylinder 12 in a penetrating way, the sliding shaft 5 can slide up and down in the inner cylinder 12, one end of the stretching spring 6 is fixedly connected with the sliding shaft 5, the other end of the stretching spring 6 is propped against the bottom of the accommodating cavity, the sliding shaft 5 is positioned at an upper limit position under the action of the elasticity of the stretching spring 6, an adjusting gap is reserved between the bottom of the sliding shaft 5 and the bottom of the accommodating cavity, and the adjusting gap provides a movement space for the sliding shaft 5 to move downwards against the elasticity of the stretching spring 6. The top of the sliding shaft 5 is provided with a guide shaft 52 with gradually increased diameter from top to bottom, and the guide shaft 52 can be of a conical structure or a truncated cone structure. A central shaft 22 is provided at the axial center of the rotary piston 2, and the central shaft 22 extends downward into the inner cylinder 12. When the rotary piston 2 is driven by torque only, the central shaft 22 is attached to the side wall of the guide shaft 52 to rotate under the action of the elasticity of the tension spring 6, and the rotary piston 2 rotates in the annular metering cavity 10 according to the restraining rotation track; when the rotary piston 2 is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the sliding shaft 5 to slide downwards against the elastic force of the tension spring 6, so that the rotary piston 2 is deviated to give away the impurity discharging distance.
In this embodiment, the connection manner between the extension spring 6 and the sliding shaft 5 may be the above-mentioned fixed connection, or a limiting shaft shoulder 51 may be provided on the sliding shaft 5, and an outwardly protruding limiting block 121 may be provided on the inner sidewall of the inner cylinder 12 above the limiting shaft shoulder 51, where the limiting block 121 may be an annular limiting block. The extension spring 6 is sleeved on the sliding shaft 5, one end of the extension spring 6 abuts against the limiting shaft shoulder 51, the other end of the extension spring 6 abuts against the bottom of the accommodating cavity, the limiting shaft shoulder 51 abuts against the limiting block 121 under the action of elasticity of the extension spring 6, and an adjusting gap is reserved between the bottom of the sliding shaft 5 and the bottom of the inner cylinder 12.
The rest of the structure and the use mode are the same as those of the first embodiment, and are not repeated.
Example III
Referring to fig. 5 and 6, the difference between the present embodiment and the first or second embodiment is that the elastic restraining device has a different structure, and the elastic restraining device in the present embodiment has the following structure: an inner cylinder 12 is arranged in the annular metering cavity 10, an elastic shaft 7 made of elastic materials is fixedly arranged in the inner cylinder 12, a central shaft 22 is arranged at the axial center position of the rotary piston 2, and the central shaft 22 extends downwards into the inner cylinder 12; when the rotary piston 2 is driven by torque only, the central shaft 22 is attached to the side wall of the elastic shaft 7 to rotate, and the rotary piston 2 rotates in the annular metering cavity according to the rotation track of the restraint; when the rotary piston 2 is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the stress area of the elastic shaft 7 to elastically deform, so that the rotary piston 2 is deviated to give away the distance for discharging the impurities. The other structures are the same as those of the first embodiment or the second embodiment, and will not be described again.
When the rotary piston 2 is driven to rotate in a certain direction by the differential pressure of fluid inlet and outlet, as shown in fig. 5, the central shaft 22 is jointed with the side wall of the elastic shaft 7 to rotate, the rotary piston 2 rotates in the annular metering cavity 10 according to the rotation track of the constraint beam, at the moment, the rotation track of the rotary piston 2 is restrained by the cooperation of the elastic shaft 7 and the central shaft 22, and when the central shaft 22 rotates along the side wall of the elastic shaft 7, the outer side wall of the rotary piston 2 is jointed with the inner side wall of the outer cylinder 11 to rotate, and the inner side wall of the rotary piston 2 is jointed with the outer side wall of the inner cylinder 12 to rotate. Referring to fig. 6, when the rotary piston 2 is driven by torque and the interference force generated by the interference of the impurities, the interference force can force the stress area of the elastic shaft 7 to elastically deform, so that the rotary piston 2 is offset to give away the impurity-discharging distance, that is, the constraint of the rotary track of the rotary piston 2 is released, the rotary piston 2 which rotates tangentially to the inner cylinder 12 and the outer cylinder 11 respectively can smoothly bypass the impurities, when the rotary piston 2 smoothly bypasses the impurities or the impurities are washed away by the fluid, the interference force applied to the rotary piston 2 disappears, and the deformation area of the elastic shaft 7 returns to the original shape, and at the moment, the rotary track of the rotary piston 2 can be constrained by the cooperation of the elastic shaft 7 and the central shaft 22.
Example IV
As shown in fig. 5 and 6, the present embodiment is different from the third embodiment in that: the elastic shaft 7 is composed of an upper elastic shaft 71 and a lower elastic shaft 72, the diameter of the upper elastic shaft 71 is smaller than that of the lower elastic shaft 72, a step surface is formed between the upper elastic shaft 71 and the lower elastic shaft 72, a limiting block 121 protruding outwards is arranged on the inner side wall of the inner cylinder 12 above the step surface, and the limiting block 121 can be an annular limiting block. When the rotary piston 2 is driven by torque only, the central shaft 22 is attached to the side wall of the upper elastic shaft 71 to rotate, and the rotary piston 2 rotates in the annular metering cavity 10 according to a restraining rotation track; when the rotary piston 2 is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the stress area of the upper elastic shaft 71 to elastically deform, so that the rotary piston is deviated to give away the distance for discharging the impurities. The rest structure and the use mode are the same as those of the embodiment, and are not repeated.
Example five
As shown in fig. 7, 8 and 9, the difference between the present embodiment and the first or second embodiment is that the elastic restraining device has a different structure, and the elastic restraining device in the present embodiment has the following structure: an inner cylinder body 12 is arranged in the annular metering cavity 10, a first step hole is formed in the upper section of the inner cylinder body, the diameter of the first step hole is larger than that of the inner wall of the inner cylinder body, an elastic eccentric ring 8 made of elastic materials is arranged in the first step hole, the elastic eccentric ring 8 can rotate around the axis of the first step hole in the first step hole, a central shaft 22 is arranged at the axis position of the rotary piston 2, the central shaft 22 stretches into an eccentric hole 81 of the elastic eccentric ring 8, and when the rotary piston 2 is driven by torque, the central shaft 22 pushes the eccentric ring 8 to rotate and enables the rotary piston 2 to rotate in the annular metering cavity 10 according to a restraint rotation track; when the rotary piston 2 is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the stress area of the eccentric hole 81 to elastically deform, so that the rotary piston 2 is deviated to give away the distance for discharging the impurities. The other structures are the same as those of the first embodiment or the second embodiment, and will not be described again.
When the rotary piston 2 is driven to rotate in the annular metering cavity 10 only by torque under the action of differential pressure of fluid inlet and outlet during operation, as shown in fig. 7, the central shaft 22 pushes the eccentric ring 8 to rotate and enables the rotary piston 2 to rotate in the annular metering cavity 10 according to a constraint rotation track, at the moment, the rotation track of the rotary piston 2 is constrained through the cooperation of the eccentric ring 8 and the central shaft 22, and when the central shaft 22 pushes the eccentric ring 8 to rotate, the outer side wall of the rotary piston 2 is jointed with the inner side wall of the outer cylinder 11 to rotate and the inner side wall of the rotary piston 2 is jointed with the outer side wall of the inner cylinder 12 to rotate. As shown in fig. 9, when the rotary piston 2 is driven by torque and the interference force generated by the interference of the impurities, the interference force can force the stressed area of the eccentric hole 81 to elastically deform, so that the rotary piston 2 is offset to give away the impurity discharging distance, that is, the constraint of the rotary track of the rotary piston 2 is released, the rotary piston 2 which rotates tangentially to the inner cylinder 12 and the outer cylinder 11 respectively can smoothly bypass the impurities, when the rotary piston 2 smoothly bypasses the impurities or the impurities are washed away by the fluid, the interference force applied to the rotary piston 2 disappears, and the deformed area of the eccentric hole 81 returns to the original shape, and at the moment, the rotary track of the rotary piston 2 can be constrained by the cooperation of the eccentric ring 8 and the central shaft 22.
Example six
Referring to fig. 10 and 11, the difference between the present embodiment and the first or second embodiment is that the elastic restraining device has a different structure, and the elastic restraining device in the present embodiment has the following structure: an inner cylinder 12 is arranged in the annular metering cavity 10, a limiting shaft 9 is fixedly arranged in the inner cylinder 12, an elastic central shaft 23 made of elastic materials is arranged at the axial center position of the rotary piston 2, the elastic central shaft 23 stretches downwards into the inner cylinder 12, when the rotary piston 2 is driven by torque only, the elastic central shaft 23 is attached to the side wall of the limiting shaft to rotate, and the rotary piston 2 rotates in the annular metering cavity 10 according to a limiting rotation track; when the rotary piston 2 is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the stress area of the elastic central shaft 23 to elastically deform, so that the rotary piston 2 is deviated to give away the distance for discharging the impurities. The other structures are the same as those of the first embodiment or the second embodiment, and will not be described again.
When the rotary piston 2 is driven to rotate in the annular metering cavity 10 only by torque under the action of differential pressure of a fluid inlet and a fluid outlet, the elastic central shaft 23 is attached to the side wall of the limiting shaft 9 to rotate, the rotary piston 2 rotates in the annular metering cavity 10 according to a constraint rotation track, at the moment, the rotation track of the rotary piston 2 is constrained through the cooperation of the limiting shaft 9 and the elastic central shaft 23, and when the elastic central shaft 23 rotates along the side wall of the limiting shaft 9, the outer side wall of the rotary piston 2 is attached to the inner side wall of the outer cylinder 11 to rotate, and the inner side wall of the rotary piston 2 is attached to the outer side wall of the inner cylinder 12 to rotate, as shown in fig. 10. Referring to fig. 11, when the rotary piston 2 is driven by torque and the interference force generated by the interference of the impurities, the interference force can force the stress area of the elastic central shaft 23 to elastically deform, so that the rotary piston 2 is deviated to give away the impurity discharging distance, that is, the constraint of the rotary track of the rotary piston 2 is released, the rotary piston 2 which rotates tangentially to the inner cylinder 12 and the outer cylinder 11 respectively can smoothly bypass the impurities, when the rotary piston 2 smoothly bypasses the impurities or the impurities are washed away by the fluid, the interference force applied to the rotary piston 2 disappears, the deformation area of the elastic central shaft 23 returns to the original shape, and at the moment, the rotary track of the rotary piston 2 can be constrained by the cooperation of the elastic central shaft 23 and the limiting shaft 9.
Example seven
As shown in fig. 10 and 11, the present embodiment is different from the sixth embodiment in that: the limiting shaft 9 is composed of an upper-section limiting shaft 91 and a lower-section limiting shaft 92, and the diameter of the upper-section limiting shaft 91 is smaller than that of the lower-section limiting shaft 92; when the rotary piston 2 is driven by torque only, the elastic central shaft 23 is attached to the side wall of the upper elastic shaft 91 to rotate, and the rotary piston 2 rotates in the annular metering cavity 10 according to a restraining rotation track; when the rotary piston 2 is driven by torque and the interference force formed by the obstruction of impurities, the interference force can force the stress area of the elastic central shaft 23 to elastically deform, so that the rotary piston 2 is deviated to give away the distance for discharging the impurities. In the actual processing process, the limiting shaft 9 and the inner cylinder 11 can be integrally processed and formed. The rest of the structure and the use mode are the same as those of the sixth embodiment, and are not repeated.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any other way, but any modifications or equivalent variations according to the technical spirit of the present invention are still included in the scope of the present invention.
The invention has the advantages that: on the basis of guaranteeing high metering accuracy of the rotary piston flowmeter, the phenomenon that the rotary piston 2 is blocked is effectively avoided, and the fault rate of the rotary piston flowmeter is greatly reduced.
Claims (2)
1. An anti-seize rotary piston flowmeter comprising: piston outer core, rotary piston, gland and signal acquisition device in annular measurement chamber in area, its characterized in that: an elastic restraining device for elastically restraining the rotation track of the rotary piston in the annular metering cavity is arranged in the annular metering cavity, and the elastic restraining device can restrain the rotation track of the rotary piston when the rotary piston is driven by torque only, so that the rotary piston rotates in the annular metering cavity according to the restrained rotation track; when the rotary piston is driven by torque and is blocked by impurities, the interference force can enable the elastic constraint device to release the constraint of the rotary piston rotation track until the interference force disappears;
the elastic restraint device has the structure that: an inner cylinder body is arranged in the annular metering cavity, a sliding shaft is inserted into the inner cylinder body and can slide up and down in the inner cylinder body, one end of a tension spring is fixedly connected with the sliding shaft, the other end of the tension spring is fixedly connected with the inner cylinder body, the sliding shaft is positioned at an upper limit position under the action of elasticity of the tension spring, and an adjusting gap is reserved between the bottom of the sliding shaft and the bottom of the inner cylinder body; a guide shaft with gradually increased diameter from top to bottom is arranged at the top of the sliding shaft, a central shaft is arranged at the axial center position of the rotary piston, and the central shaft extends downwards into the inner cylinder body; when the rotary piston is driven by torque only, the central shaft is attached to the side wall of the guide shaft to rotate under the action of the elasticity of the tension spring, and the rotary piston rotates in the annular metering cavity according to the restraining rotation track; when the rotary piston is driven by torque and is blocked by impurities, the interference force can force the sliding shaft to overcome the elasticity of the tension spring to slide downwards, so that the rotary piston is deviated to give away the impurity discharging distance;
the piston outer core is fixedly arranged in the accommodating cavity, the gland covers the piston outer core in the accommodating cavity in a sealing way, the fluid inlet at the bottom of the piston outer core is communicated with the fluid input channel, and the fluid outlet at the bottom of the piston outer core is communicated with the fluid output channel.
2. An anti-seize rotary piston flowmeter as set forth in claim 1 wherein: the sliding shaft is provided with a limiting shaft shoulder, an outwards protruding limiting block is arranged on the inner side wall of the inner cylinder body above the limiting shaft shoulder, the sliding shaft is sleeved with a stretching spring, one end of the stretching spring is propped against the limiting shaft shoulder, the other end of the stretching spring is fixedly connected with the inner cylinder body, the limiting shaft shoulder is propped against the limiting block under the action of elasticity of the stretching spring, and an adjusting gap is reserved between the bottom of the sliding shaft and the bottom of the inner cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810144622.XA CN108387280B (en) | 2018-02-12 | 2018-02-12 | Anti-seize rotary piston flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810144622.XA CN108387280B (en) | 2018-02-12 | 2018-02-12 | Anti-seize rotary piston flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108387280A CN108387280A (en) | 2018-08-10 |
| CN108387280B true CN108387280B (en) | 2024-03-15 |
Family
ID=63068777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810144622.XA Active CN108387280B (en) | 2018-02-12 | 2018-02-12 | Anti-seize rotary piston flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108387280B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414492B (en) * | 2020-12-10 | 2024-06-25 | 张家港海纳德智能科技有限公司 | Piston core in rotary piston flowmeter |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB363722A (en) * | 1930-09-23 | 1931-12-23 | Kent Ltd G | Improvements in or relating to liquid measuring apparatus |
| GB625698A (en) * | 1946-11-08 | 1949-07-01 | Sydney Ewart Bullock | A device for supplying a measured quantity of liquid |
| GB764550A (en) * | 1954-02-17 | 1956-12-28 | Rockwell Mfg Co | Predetermining dispensing apparatus |
| CA2047012A1 (en) * | 1990-07-12 | 1992-01-13 | Michel Deal | Dosing device for grains or powder-like products, process for mixing raw rubber materials using this device |
| AU1021892A (en) * | 1991-03-25 | 1992-10-01 | Kubota Corporation | Hydraulic clutch operating apparatus |
| JPH05133429A (en) * | 1991-11-11 | 1993-05-28 | Sumitomo Electric Ind Ltd | Piston returning mechanism of disc brake |
| US6018995A (en) * | 1997-08-01 | 2000-02-01 | Spanner-Pollux Gmbh | Oscillating piston flowmeter |
| CN1484002A (en) * | 2002-07-09 | 2004-03-24 | Volumetric fluid meter | |
| US7191646B1 (en) * | 2004-07-12 | 2007-03-20 | Link-Tech, Inc. | Positive displacement flow meter |
| CN101305269A (en) * | 2005-08-10 | 2008-11-12 | 埃尔斯特计量有限公司 | Positive displacement fluid flow meter |
| CN201993131U (en) * | 2010-10-29 | 2011-09-28 | 曾立文 | Anti-drip water meter |
| CN204282198U (en) * | 2014-12-08 | 2015-04-22 | 湖南科技大学 | Speed displacement twin-lock adjustable type viscous damper |
| CN105737927A (en) * | 2014-12-12 | 2016-07-06 | 西安北斗星数码信息股份有限公司 | Piston type anti-disturbance water meter |
| DE102015000904A1 (en) * | 2015-01-23 | 2016-07-28 | Brand Gmbh + Co Kg | Valve block assembly for a bottle top device |
| CN106352932A (en) * | 2016-11-01 | 2017-01-25 | 张家港海纳德智能科技有限公司 | Liquid measurement device with backflow mechanism |
| CN206450274U (en) * | 2017-01-19 | 2017-08-29 | 山东协和学院 | A kind of measuring box of piston volume type water meter |
| CN206959933U (en) * | 2017-07-20 | 2018-02-02 | 宁波宁水仪表有限公司 | A kind of water meter |
| CN207866306U (en) * | 2018-02-12 | 2018-09-14 | 张家港海纳德智能科技有限公司 | A kind of anti-sticking rotary-piston flowmeter |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB857348A (en) * | 1958-03-27 | 1960-12-29 | Avery Hardoll Ltd | Improvements in or relating to rotary metering devices for liquids |
| DD238445A1 (en) * | 1985-06-20 | 1986-08-20 | Univ Schiller Jena | HOLDING AND SEALING ELEMENT FOR A DOSING DEVICE |
| CN2153044Y (en) * | 1992-11-21 | 1994-01-12 | 王留生 | Rotary pendulum piston, volumetric water meter |
| DE29614473U1 (en) * | 1996-08-21 | 1997-12-18 | Rappenhöner, Hans Richard, 51789 Lindlar | Rotary piston dispenser |
| DE10123429A1 (en) * | 2001-05-14 | 2002-11-21 | Hans-Peter Dewald | Water meter with combined meters for measuring high and low mass flows has reduced pressure loss due to use of a weak spring in the changeover valve insert that automatically controls water flow between meters |
| CN2482682Y (en) * | 2001-07-06 | 2002-03-20 | 温州市煤矿机械厂 | Flow meter for fuel charger |
| FR2893125B1 (en) * | 2005-11-10 | 2008-06-06 | Sappel Soc Par Actions Simplif | CHAMBER OF CYLINDRICAL MEASUREMENT OF LIQUID COUNTER |
| CN201203447Y (en) * | 2008-05-23 | 2009-03-04 | 杨�远 | Rotary-piston type flowmeter |
| CN203519087U (en) * | 2013-10-15 | 2014-04-02 | 山东冠翔仪表有限公司 | Ball valve locking prevented type IC (Integrated Circuit) card water meter casing |
| CH709451A1 (en) * | 2014-03-31 | 2015-10-15 | Capartis Ag | Metering device for a liquid feed from a container or hose with nozzle. |
| CN204007750U (en) * | 2014-07-21 | 2014-12-10 | 四川理工学院 | Photoelectromagnetic coupling rotary-piston type flowmeters |
| CN204575157U (en) * | 2015-04-20 | 2015-08-19 | 泸州市慧江机械制造有限公司 | A kind of rotary-piston type flowmeters |
-
2018
- 2018-02-12 CN CN201810144622.XA patent/CN108387280B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB363722A (en) * | 1930-09-23 | 1931-12-23 | Kent Ltd G | Improvements in or relating to liquid measuring apparatus |
| GB625698A (en) * | 1946-11-08 | 1949-07-01 | Sydney Ewart Bullock | A device for supplying a measured quantity of liquid |
| GB764550A (en) * | 1954-02-17 | 1956-12-28 | Rockwell Mfg Co | Predetermining dispensing apparatus |
| CA2047012A1 (en) * | 1990-07-12 | 1992-01-13 | Michel Deal | Dosing device for grains or powder-like products, process for mixing raw rubber materials using this device |
| AU1021892A (en) * | 1991-03-25 | 1992-10-01 | Kubota Corporation | Hydraulic clutch operating apparatus |
| JPH05133429A (en) * | 1991-11-11 | 1993-05-28 | Sumitomo Electric Ind Ltd | Piston returning mechanism of disc brake |
| US6018995A (en) * | 1997-08-01 | 2000-02-01 | Spanner-Pollux Gmbh | Oscillating piston flowmeter |
| CN1484002A (en) * | 2002-07-09 | 2004-03-24 | Volumetric fluid meter | |
| US7191646B1 (en) * | 2004-07-12 | 2007-03-20 | Link-Tech, Inc. | Positive displacement flow meter |
| CN101305269A (en) * | 2005-08-10 | 2008-11-12 | 埃尔斯特计量有限公司 | Positive displacement fluid flow meter |
| CN201993131U (en) * | 2010-10-29 | 2011-09-28 | 曾立文 | Anti-drip water meter |
| CN204282198U (en) * | 2014-12-08 | 2015-04-22 | 湖南科技大学 | Speed displacement twin-lock adjustable type viscous damper |
| CN105737927A (en) * | 2014-12-12 | 2016-07-06 | 西安北斗星数码信息股份有限公司 | Piston type anti-disturbance water meter |
| DE102015000904A1 (en) * | 2015-01-23 | 2016-07-28 | Brand Gmbh + Co Kg | Valve block assembly for a bottle top device |
| CN106352932A (en) * | 2016-11-01 | 2017-01-25 | 张家港海纳德智能科技有限公司 | Liquid measurement device with backflow mechanism |
| CN206450274U (en) * | 2017-01-19 | 2017-08-29 | 山东协和学院 | A kind of measuring box of piston volume type water meter |
| CN206959933U (en) * | 2017-07-20 | 2018-02-02 | 宁波宁水仪表有限公司 | A kind of water meter |
| CN207866306U (en) * | 2018-02-12 | 2018-09-14 | 张家港海纳德智能科技有限公司 | A kind of anti-sticking rotary-piston flowmeter |
Non-Patent Citations (5)
| Title |
|---|
| Evolutionary-based aeroelastic tailoring of stiffened laminate composite panels in supersonic flow regime;Marques，FD;《COMPOSITE STRUCTURES》;第167卷;第30-37页 * |
| Power piston support components design of free piston Stirling linear generator;Jigui Zheng;《2016 IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)》;第668 - 671页 * |
| 基于ADAMS的曲轴连杆活塞建模与仿真;陈立辉 等;《机械传动》;第34卷(第7期);第60-63页 * |
| 滤池过滤与反冲洗优化试验研究;唐德翠 等;《供水技术》;第5卷(第3期);第10-14页 * |
| 特种凸轮发动机活塞部件振动频率与温度的关系;李斌茂 等;《机械与电子》(第3期);第26-28页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108387280A (en) | 2018-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104565521B (en) | Novel metering ball valve | |
| CN108387280B (en) | Anti-seize rotary piston flowmeter | |
| SE438195B (en) | BACK VALVE AND WAY TO MANUFACTURE IT | |
| CN113465812B (en) | Inductance type water pressure sensor | |
| CN112797169B (en) | Back flush type stop valve | |
| US9719604B2 (en) | Check valve for a fluid flow regulation system | |
| RU2345264C2 (en) | Device for positioning of metering diaphragm in body, unit of two-chamber metering diaphragm attachment (versions) | |
| US4637244A (en) | Meter provers | |
| US20100089471A1 (en) | Valve | |
| CN100381793C (en) | Water meter with micro starting flow | |
| CN212180005U (en) | Flowmeter convenient to adjust flow and take temperature measurement function | |
| US6581457B2 (en) | Compound fluid meter with flow distributor | |
| CN109058129A (en) | pressure switch suitable for pump | |
| CN201050998Y (en) | A compound water meter | |
| CN101038193A (en) | Compound water meter | |
| CN217655067U (en) | Pressure mixing and equalizing damper and liquid chromatograph | |
| CN116989147B (en) | Precise flow regulating valve and assembling method thereof | |
| CN219624816U (en) | Flow module of thermal gas meter | |
| CN212745211U (en) | Flow locking function balance valve | |
| CN217466801U (en) | Ultrasonic detection flow adjusting device | |
| CN212692992U (en) | Manually-adjusted electronic flowmeter | |
| US20160069721A1 (en) | Porting configuration for a fluid flow meter | |
| CN218066590U (en) | Flowmeter for water-saving analysis | |
| CN214149684U (en) | Pressure detection device of vertical pump | |
| CN212988470U (en) | Corrosion-resistant orifice plate flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |