CN114791050A - Automatic back pressure valve and fluid metering and adding system - Google Patents
Automatic back pressure valve and fluid metering and adding system Download PDFInfo
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- CN114791050A CN114791050A CN202210426889.4A CN202210426889A CN114791050A CN 114791050 A CN114791050 A CN 114791050A CN 202210426889 A CN202210426889 A CN 202210426889A CN 114791050 A CN114791050 A CN 114791050A
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- 239000012530 fluid Substances 0.000 title claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 62
- 238000007789 sealing Methods 0.000 claims description 91
- 238000009434 installation Methods 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 22
- 230000008569 process Effects 0.000 description 18
- 239000007788 liquid Substances 0.000 description 10
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 238000013016 damping Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
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- 230000006978 adaptation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/202—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means actuated by an electric motor
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- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The application relates to the technical field of valves, and provides an automatic back pressure valve and a fluid metering and adding system, wherein the automatic back pressure valve comprises a back pressure valve body; the pressure sensor is arranged inside the backpressure valve body and positioned at the outlet end of the backpressure valve body, and is used for detecting the pressure value inside the backpressure valve body; pressure adjustment mechanism, including pressure adjustment nut, actuating mechanism who links to each other with pressure adjustment nut and the controller of being connected with the actuating mechanism electricity, pressure adjustment nut links to each other with the back pressure valve body, the controller is connected with the pressure sensor electricity, and receive the pressure value, controller control actuating mechanism drive pressure adjustment nut rotates with the adjustment pressure value, the effect of the pressure value of automatically regulated back pressure valve body has been realized, compared with the prior art, the pressure value adjustment of back pressure valve body is convenient and fast more, and simultaneously, the uncontrollable risk of artificial adjustment has also been avoided, the accuracy of adjustment has been improved.
Description
Technical Field
The application relates to the technical field of valves, in particular to an automatic back pressure valve and a fluid metering and dosing system.
Background
The back pressure valve is generally applied to pipelines of various control systems, and due to the function of the back pressure valve, a medium flowing through the pipeline can form a certain pressure, and the pressure can be generally adjusted, so that the pipeline can be cut off and throttled.
The regulation to the backpressure valve among the prior art at present is through artifical manual regulation, and complex operation not only consumes the manpower, and the precision of regulation is also relatively poor, and to an instrument and equipment, there is manual hardware that needs to exist, and the human factor of introduction just has uncontrollable risk, and the reliability of test result just is poor more.
Disclosure of Invention
An aim at of this application embodiment provides an automatic back pressure valve to realize the pressure of automatically regulated back pressure valve, improve the technological effect of back pressure valve's regulation precision.
In a first aspect, an embodiment of the present application provides an automatic back pressure valve, including: a back pressure valve body; the pressure sensor is arranged inside the back pressure valve body and positioned at the outlet end of the back pressure valve body, and the pressure sensor is used for detecting the pressure value inside the back pressure valve body; the pressure adjusting mechanism comprises a pressure adjusting nut, a driving mechanism and a controller, wherein the driving mechanism is connected with the pressure adjusting nut, the controller is electrically connected with the driving mechanism, the pressure adjusting nut is connected with the back pressure valve body, the controller is electrically connected with the pressure sensor and receives the pressure value, the controller controls the driving mechanism to drive the pressure adjusting nut to rotate, so that the pressure value is automatically adjusted to be a set value.
It should be noted that the set value may be manually input into the controller, or may be sent to the controller through a terminal, and when the controller receives the set value, it also corresponds to receiving a command for adjusting the pressure value inside the back pressure valve body to the set value in real time by controlling the pressure adjusting mechanism.
The embodiment of the application provides an automatic back pressure valve, including back pressure valve body, pressure sensor and pressure adjustment mechanism, wherein, pressure sensor is installed at the exit end of back pressure valve body, and be located the inside of back pressure valve body, when back pressure valve body is used in the equipment and is played the function, fluid medium (for example gas or liquid) gets into back pressure valve body inside from the entry end of back pressure valve body, according to the theory of operation of back pressure valve, after fluid medium forms certain pressure inside back pressure valve body, just inside back pressure valve body will form a passageway, make fluid medium can flow to the exit end of back pressure valve body from the entry end of back pressure valve body, and then flow out back pressure valve body, the pressure sensor in this application embodiment is established in back pressure valve body's inside and is located the exit end position of back pressure valve body, when fluid medium flows to the exit end of back pressure valve body, that is, a passage is formed inside the back pressure valve body at this time, and the pressure sensor can measure the pressure value inside the back pressure valve body at this time, that is, the pressure sensor can measure the pressure value applied by the fluid medium to the back pressure valve body; the pressure regulating mechanism comprises a pressure regulating nut, a controller and a driving mechanism, wherein the pressure regulating nut is connected with the back pressure valve body, the driving mechanism is connected with the pressure regulating nut, the controller is electrically connected with a pressure sensor and the driving mechanism, the pressure sensor can transmit the measured pressure value to the controller in real time, when a user needs to increase or decrease the pressure value inside the back pressure valve body, a target pressure value (also called a set value) can be input into the controller, the controller can control the driving mechanism to drive the pressure regulating nut to rotate according to the target pressure value so as to adjust the pressure value inside the back pressure valve body to the target pressure value, when the adjustment is completed, a fluid medium can form a passage inside the back pressure valve body when reaching the target pressure value inside the back pressure valve body so as to smoothly flow from the inlet end of the back pressure valve body, flow from the exit end, realized the effect of the pressure value of automatically regulated back pressure valve body, compared with the prior art, the pressure value adjustment of back pressure valve body is convenient and fast more, simultaneously, has also avoided the uncontrollable risk of artificial adjustment, has improved the adjustment accuracy.
In one possible implementation, the back pressure valve body comprises: a chamber; the sealing assembly is arranged in the cavity; the inlet pipeline is arranged in the cavity, and the outlet end of the inlet pipeline is abutted with the sealing component; the outlet pipeline is arranged on the side wall of the cavity, a fluid medium enters the inlet pipeline and extrudes the sealing assembly, and the inlet pipeline is communicated with the outlet pipeline.
In the above-mentioned realization process, the backpressure valve body includes: the back pressure valve comprises a cavity, a sealing assembly, an inlet pipeline and an outlet pipeline, wherein the cavity is limited in the back pressure valve body, one end of the sealing assembly is connected with a pressure adjusting nut, and the other end of the sealing assembly is abutted to the outlet end of the inlet pipeline. When the pressure value in the back pressure valve body is zero, the sealing assembly is in a state of being just contacted with the outlet end of the inlet pipeline at the moment, in the state, after a fluid medium enters the inlet pipeline, the fluid medium can smoothly enter the outlet pipeline without applying force to squeeze the sealing assembly and flows out of the back pressure valve body, and at the moment, the pressure value measured by the pressure sensor is also zero; when the user need adjust the pressure value of the inside of back pressure valve body to the setting value, pressure adjusting nut can take place to rotate under the control of controller, make seal assembly be close to the exit end of inlet pipeline and be in the state of in close contact with the exit end of inlet pipeline, under this state, fluid medium gets into behind the inlet pipeline, need exert certain power extrusion seal assembly, make seal assembly keep away from the exit end of inlet pipeline, thereby communicate inlet pipeline and outlet pipeline, at this moment, fluid medium has certain pressure, and the pressure value is the set pressure value.
In one possible implementation, the seal assembly includes: the sealing ring is arranged at the outlet end of the inlet pipeline and is communicated with the inlet pipeline; the first end of the spring is connected with the pressure adjusting nut; the valve needle structure comprises a valve needle and a pressure spring pad, one end of the pressure spring pad is connected with the second end of the spring, the other end of the pressure spring pad is connected with one end of the valve needle, the valve needle extends along the length direction of the cavity, and the other end of the valve needle points to the sealing ring; the spring is compressed or stretched and pushes the valve needle to press the sealing ring or move away from the sealing ring so as to seal off or open the outlet end of the inlet pipeline.
In the implementation process, the sealing ring is an elastic part with a through hole, two ends of the through hole of the sealing ring are respectively communicated with the inlet pipeline and the outlet pipeline, when the pressure value in the back pressure valve body is zero, the spring pressure is zero, the pressure borne by the pressure spring pad and the valve needle is zero, the valve needle and the sealing ring are in a rigid contact state, at the moment, fluid media can enter from the inlet pipeline and flow to the through hole of the sealing ring and finally flow to the outlet pipeline, and the pressure value measured by the pressure sensor is zero at the moment; when a user inputs a set value (assumed as NMPa) to the controller and needs to execute the automatic back pressure valve, the driving mechanism can control the pressure adjusting nut to rotate, the pressure adjusting nut pushes the spring to compress the spring, so that the pressure spring pad of the valve needle structure pushes the valve needle to move close to the sealing ring and extrude the sealing ring to apply a certain acting force to seal the outlet end of the inlet pipeline, namely, the through hole of the sealing ring is sealed, at the moment, the fluid medium can increase the pressure of the fluid medium because the outlet end of the inlet pipeline is sealed by the valve needle and the sealing ring, the increased pressure can act on the valve needle to force the valve needle to move towards one end close to the spring, and the fluid medium can enable the through hole of the sealing ring to be communicated with the outlet pipeline again until the pressure value is increased to NMPa.
In one possible implementation, the seal assembly further includes: the sealing pressing piece is arranged on one side, away from the inlet pipeline, of the sealing ring, and the valve needle penetrates through the sealing pressing piece and is abutted to the sealing ring; the valve needle sealing ring is sleeved on the outer peripheral side of the valve needle and is abutted with the side wall of the cavity; and the distance between the sealing pressing piece and the valve needle sealing ring is equal to the diameter of the outlet pipeline.
At above-mentioned realization in-process, sealed piece that compresses tightly is injectd the sealing washer in certain space, prevents that the sealing washer from taking place to remove, influences the use of automatic back pressure valve. In addition, the valve needle sealing ring is sleeved on the outer periphery of the valve needle and abutted against the side wall of the cavity, the distance between the sealing pressing piece and the valve needle sealing ring is equal to the diameter of the outlet pipeline, and the distance between the sealing pressing piece and the valve needle sealing ring is called as the volume in the closed space of the back pressure valve, compared with the back pressure valve in the prior art, the volume in the closed space of the back pressure valve is greatly reduced, and the volume in the closed space of the back pressure valve is a problem which is neglected for a long time, the inventor of the application finds that the volume in the closed space of the back pressure valve is a very important problem under the requirements of high-pressure and high-precision instruments, gas and liquid can be compressed under high pressure, when the compressed space of the gas or the liquid is very large, the space becomes a damping system, when the back pressure adjusts the pressure of the valve, the pressure display is not high or low, so that the back pressure valve is difficult to be accurately controlled, and particularly when a testing instrument provided with the back pressure valve is used for testing a certain index, if the tested index is related to the volume of gas or liquid, the volume of gas or liquid which changes continuously along with the pressure change can cause the testing process to become very complicated and even fail.
In one possible implementation, the drive mechanism includes: a reduction motor; the output end of the speed reducing motor is connected with the first end of the coupler, and the pressure adjusting nut is connected with the second end of the coupler.
In the implementation process, the driving mechanism comprises a speed reducing motor and a coupler, the two ends of the coupler are connected with the output ends of the pressure adjusting nut and the speed reducing motor respectively, the speed reducing motor is controlled by the controller to rotate, the output end of the speed reducing motor drives the pressure adjusting nut to rotate, and therefore the pressure value inside the back pressure valve body is adjusted to the target pressure value.
In one possible implementation, the automatic back pressure valve further includes: the back pressure valve comprises a bottom plate, wherein a back pressure valve fixing seat is arranged at one end of the bottom plate in the length direction, an installation groove matched with a back pressure valve body is formed in the back pressure valve fixing seat, and the back pressure valve body is embedded in the installation groove and is fixedly connected with the back pressure valve fixing seat; the first sliding rail and the second sliding rail are positioned at the other end of the bottom plate in the length direction and are arranged on two sides of the bottom plate in the width direction in parallel; the first sliding block and the second sliding block are respectively connected with the first sliding rail and the second sliding rail in a sliding mode, the coupler is connected with the first sliding block and the second sliding block, the coupler rotates to drive the pressure adjusting nut to rotate and follow the length direction of the bottom plate, and the coupler drives the first sliding block and the second sliding block to respectively follow the first sliding rail and the second sliding rail to move.
In the above-mentioned implementation process, automatic back pressure valve still includes: the back pressure valve comprises a base plate, wherein a back pressure valve fixing seat is arranged on the base plate and used for installing a back pressure valve body, specifically, an installation groove is formed in the back pressure valve fixing seat, the back pressure valve body is embedded in the installation groove and fixed on the back pressure valve fixing seat through a fastener (such as a screw), a pressure adjusting nut is positioned above the base plate and arranged along the length direction of the base plate, one end of the pressure adjusting nut is connected with the back pressure valve body, the other end of the pressure adjusting nut is connected with a coupler, a first slide rail and a second slide rail which are parallel to each other are also arranged on the base plate and positioned on two sides of the width direction of the base plate, a first slide block and a second slide block are connected on the coupler in a sliding manner, the first slide block and the second slide block are respectively connected with the first slide rail and the second slide rail in a sliding manner, when the output end of a speed reducing motor drives the coupler to rotate, the coupler drives the pressure adjusting nut to rotate, and the pressure adjusting nut can move along the length direction of the base plate to be close to or far away from the back pressure valve body, at the moment, the pressure adjusting nut also drives the coupler to move along the length direction of the base plate, and when the coupler moves, the first sliding block and the second sliding block which are connected with the coupler are suitable for moving along the first sliding rail and the second sliding rail, so that the smoothness of the automatic back pressure valve during pressure adjustment is guaranteed.
In one possible implementation, the automatic back pressure valve further comprises: the connecting piece comprises a connecting plate and a mounting plate vertically connected with one end of the connecting plate, the connecting plate is positioned above the first sliding block and the second sliding block and fixedly connected with the first sliding block and the second sliding block, a groove matched with the coupler is formed in the mounting plate, and the coupler is arranged in the groove in a penetrating manner; the motor fixing plate, with mounting panel fixed connection, gear motor with the motor fixing plate is connected, just the first end of shaft coupling passes the motor fixing plate with gear motor's output is connected.
In the above-mentioned realization process, automatic back pressure valve still includes connecting piece and motor fixed plate, the connecting piece includes connecting plate and the mounting panel of being connected with the connecting plate is perpendicular, wherein, the connecting plate is on a parallel with the axis direction setting of shaft coupling, and be connected with first slider and second slider, set up the recess with shaft coupling looks adaptation on the mounting panel, motor fixed plate and mounting panel fixed connection, and set up the mounting hole that is linked together with the recess on the mounting panel on the motor fixed plate, gear motor is connected with the motor fixed plate, the recess is passed in proper order to the first section of shaft coupling, the mounting hole is connected with gear motor's output, the second end and the pressure adjusting nut of shaft coupling are connected, make automatic back pressure valve can be more stable when carrying out pressure adjustment like this, prevent the unexpected removal of each part.
In one possible implementation, the automatic back pressure valve further comprises: the moving plate is fixedly connected to the motor fixing plate; the photoelectric switch is fixedly connected to the bottom plate and electrically connected with the driving mechanism, when the moving plate and the photoelectric switch are both located at the same position in the length direction of the bottom plate, the pressure adjusting mechanism is configured to be at an initial position, and the pressure value is zero; when the set value is zero, the pressure adjusting mechanism rotates and moves along the length direction of the bottom plate, and the photoelectric switch controls the driving mechanism to stop running when the moving plate moves to the same position as the photoelectric switch.
In the above-mentioned implementation process, automatic back pressure valve still includes: the movable plate and the photoelectric switch are fixedly connected to the motor fixing plate, when the first sliding block and the second sliding block drive the connecting piece and the motor fixing plate to move, the movable plate and the motor fixing plate can also move synchronously, the photoelectric switch is arranged on the bottom plate and electrically connected with the driving mechanism, when the pressure adjusting mechanism is located at an initial position, the movable plate and the photoelectric switch are located at the same position in the length direction of the bottom plate, at the moment, the pressure value inside the back pressure valve body is zero, and the automatic back pressure valve is in an initial state. When the automatic back pressure valve is used for pressure adjustment, the movable plate can be far away from the photoelectric switch, when a user needs to restore the pressure adjusting mechanism to the initial position, the user only needs to input an instruction with a set value of zero to the controller, at the moment, the controller can control the driving mechanism to rotate and move along the length direction of the bottom plate, when the movable plate moves to the position same as the photoelectric switch, at the moment, the photoelectric switch can automatically control the driving mechanism to stop running, the pressure adjusting mechanism is restored to the initial position, and the user can restore the automatic back pressure valve to the initial state quickly and accurately.
In one possible implementation, the drive mechanism further comprises: and one end of the mechanical claw is connected with the second end of the coupler, and the other end of the mechanical claw is clamped on the outer peripheral side of the pressure adjusting nut.
In the implementation process, the second end of the coupler is connected with the mechanical claw, the mechanical claw is clamped on the outer peripheral side of the pressure adjusting nut, and the mechanical claw is driven to rotate through the coupler so as to drive the pressure adjusting nut to rotate.
In a second aspect, embodiments of the present application further provide a fluid dosing system comprising an automatic back pressure valve as claimed in any one of claims 1 to 9.
The fluid metering dosing system provided by the embodiment of the second aspect of the present application includes the automatic back pressure valve described in any one of the embodiments of the first aspect, and therefore has the technical effects of any one of the embodiments described above, and is not described herein again.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a view angle of an automatic back pressure valve provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a back pressure valve body according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another view of an automatic back pressure valve according to an embodiment of the present disclosure;
wherein, the direction indicated by the double-headed arrow in fig. 1 is the length direction of the bottom plate;
wherein the direction indicated by the double-headed arrow in fig. 2 is the length direction of the chamber.
An icon: 100-automatic back pressure valve; 1-back pressure valve body; 2-a pressure sensor; 3-a pressure adjusting nut; 4-a drive mechanism; 401-a geared motor; 402-a coupling; 403-gripper; 5-a chamber; 6-a sealing assembly; 601-sealing ring; 602-a spring; 603-a valve needle; 604-pressure spring pad; 605-a seal compression member; 606-a valve needle sealing ring; 7-an inlet line; 8-an outlet line; 801-outlet end of outlet line; 10-a base plate; 11-backpressure valve fixing seat; 12-a first slide rail; 13-a second slide rail; 14-a first slide; 15-a second slide; 16-a connecting plate; 17-mounting a plate; 18-motor fixing plate; 19-moving the plate; 20-photoelectric switch.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
In a first aspect, referring to fig. 1, an automatic back pressure valve 100 provided in an embodiment of the present invention includes a back pressure valve body 1, a pressure sensor 2 and a pressure regulating mechanism, wherein the pressure sensor 2 is installed at an outlet end of the back pressure valve body 1 and is located inside the back pressure valve body 1, when the back pressure valve body 1 is applied to a device to perform a function, a fluid medium (e.g., gas or liquid) enters the back pressure valve body 1 from the inlet end of the back pressure valve body 1, and according to a working principle of the back pressure valve, after the fluid medium forms a certain pressure inside the back pressure valve body 1, a passage is formed inside the back pressure valve body 1, so that the fluid medium can flow from the inlet end of the back pressure valve body 1 to the outlet end of the back pressure valve body 1 and then flows out of the back pressure valve body 1, the pressure sensor 2 in the embodiment of the present invention is installed inside the back pressure valve body 1 and located at the outlet end of the back pressure valve body 1, when the fluid medium flows to the outlet end of the backpressure valve body 1, namely, a passage is formed inside the backpressure valve body 1 at the moment, the pressure sensor 2 can measure the pressure value inside the backpressure valve body 1 at the moment, namely, the pressure sensor 2 can measure the pressure value applied to the backpressure valve body 1 by the fluid medium; the pressure regulating mechanism comprises a pressure regulating nut 3, a controller (not shown in the figure) and a driving mechanism 4, wherein the pressure regulating nut 3 is connected with the back pressure valve body 1, the driving mechanism 4 is connected with the pressure regulating nut 3, the controller is electrically connected with the pressure sensor 2 and the driving mechanism, the pressure sensor 2 can transmit the measured pressure value to the controller in real time, when a user needs to increase or decrease the pressure value in the back pressure valve body 1, a target pressure value can be input into the controller, namely, a set value is input, the controller can control the driving mechanism 4 to drive the pressure regulating nut 3 to rotate according to the target pressure value so as to adjust the pressure value in the back pressure valve body 1 to the target pressure value, and after the adjustment is completed, a fluid medium can form a passage in the back pressure valve body 1 when the fluid medium needs to reach the target pressure value in the back pressure valve body 1, to supply fluid medium to flow into from the entrance point of back pressure valve body 1 smoothly, flow from the exit end, realized the effect of automatically regulated back pressure valve body 1's pressure value, compare with prior art, back pressure valve body 1's pressure value adjustment convenient and fast more, simultaneously, also avoided the uncontrollable risk of artificial adjustment, improved the adjustment precision.
It should be noted that the pressure sensor 2 indicated in fig. 1 represents only the position where the pressure sensor 2 is located, the sensing surface of the pressure sensor 2 being located substantially inside the backpressure valve body 1.
As shown in fig. 2, in a possible implementation, the backpressure valve body 1 comprises: a chamber 5; the sealing assembly 6 is arranged in the cavity 5, the inlet pipeline 7 is arranged in the cavity 5, and the outlet end of the inlet pipeline 7 is abutted to the sealing assembly 6; and the outlet pipeline 8 is arranged in the chamber 5, the outlet end 801 of the outlet pipeline 8 is arranged on the side wall of the chamber 5, and fluid medium enters the inlet pipeline 7 and presses the sealing assembly 6 to communicate the inlet pipeline 7 with the outlet pipeline 8.
In the above-mentioned implementation process, the back pressure valve body 1 includes: the back pressure valve comprises a cavity 5, a sealing assembly 6, an inlet pipeline 7 and an outlet pipeline 8, wherein the cavity 5 is limited inside the back pressure valve body 1, one end of the sealing assembly 6 is connected with a pressure adjusting nut 3, and the other end of the sealing assembly is abutted to the outlet end of the inlet pipeline 7. When the pressure value inside the backpressure valve body 1 is zero, the sealing assembly 6 is in a state of just contacting with the outlet end of the inlet pipeline 7 at the moment, in the state, after a fluid medium enters the inlet pipeline 7, the fluid medium can smoothly enter the outlet pipeline 8 without applying force to extrude the sealing assembly 6 and flow out of the backpressure valve body 1, and at the moment, the pressure value measured by the pressure sensor 2 is also zero; when the user need adjust the pressure value of the inside of back pressure valve body 1 to the setting value, pressure adjusting nut can 3 take place to rotate under the control of controller, make seal assembly 6 be close to the exit end of inlet pipeline 7 and be in the state of in close contact with the exit end of inlet pipeline 7, under this state, fluid medium gets into inlet pipeline 7 after, need apply certain power extrusion seal assembly 6, make seal assembly 6 keep away from the exit end of inlet pipeline 7, thereby be linked together inlet pipeline 7 and outlet pipeline 8, at this moment, fluid medium has certain pressure, and the pressure value is the settlement pressure value.
As shown in fig. 2, in one possible implementation, the sealing assembly 6 comprises: the sealing ring 601 is arranged at the outlet end of the inlet pipeline 7 and is communicated with the inlet pipeline 7; a spring 602, a first end of which is connected with the pressure adjusting nut 3; the valve needle structure comprises a valve needle 603 and a pressure spring pad 604 connected with the valve needle 603, wherein one end of the pressure spring pad 604 is connected with the second end of the spring 602, and the other end of the pressure spring pad is connected with one end of the valve needle 603; the valve needle 603 extends along the length direction of the cavity 5, and the other end of the valve needle 603 points to the sealing ring 601; spring 602 is compressed or stretched and pushes needle 603 against sealing ring 601 or away from sealing ring 601 to close off or open the outlet end of inlet line 7.
In the implementation process, the sealing ring 601 is an elastic member with a through hole, two ends of the through hole of the sealing ring 601 are respectively communicated with the inlet pipeline 7 and the outlet pipeline 8, when the pressure value inside the back pressure valve body 1 is zero, the pressure of the spring 602 is zero, the pressures borne by the pressure spring pad 604 and the valve needle 603 are zero, the valve needle 603 and the sealing ring 601 are in a state of just contacting, at this time, fluid media can enter from the inlet pipeline 7 and flow to the through hole of the sealing ring 601 and finally flow to the outlet pipeline 8, and the pressure value measured by the pressure sensor 2 is zero at this time; when a user inputs a set value (assumed to be NMPa) to the controller and needs to execute the automatic back pressure valve 100, the driving mechanism 4 controls the pressure adjusting nut 3 to rotate, the pressure adjusting nut 3 pushes the spring 602 to compress the spring 602, so that the pressure spring pad 604 of the valve needle structure pushes the valve needle 603 to move close to the sealing ring 601 and press the sealing ring 601, so as to apply a certain acting force to seal the outlet end of the inlet pipeline 7, that is, to seal the through hole of the sealing ring 601, at this time, the fluid medium raises the pressure of the fluid medium because the outlet end of the inlet pipeline 7 is sealed by the valve needle 603 and the sealing ring 601, the raised pressure acts on the valve needle 603, and the valve needle 603 is forced to move towards one end close to the spring 602, and when the pressure value is raised to NMPa, the fluid medium makes the through hole of the sealing ring 601 communicate with the outlet pipeline 8 again.
In a possible implementation, the sealing assembly 6 further comprises: the sealing pressing piece 605 is arranged on one side of the sealing ring 601 far away from the inlet pipeline 7, and the valve needle 603 penetrates through the sealing pressing piece 605 and is abutted against the sealing ring 601; a valve needle sealing ring 606 which is sleeved on the outer peripheral side of the valve needle 603 and is abutted with the side wall of the cavity 5; the distance between the sealing pressing part 605 and the valve needle sealing ring 606 is equal to the diameter of the outlet pipe 8.
In the implementation process, the sealing pressing piece 605 limits the sealing ring 601 in a certain space, so that the sealing ring 601 is prevented from moving and the use of the automatic back pressure valve 100 is prevented from being influenced. In addition, the valve needle sealing ring 606 is sleeved on the outer periphery side of the valve needle 603 and is abutted against the side wall of the cavity 5, the distance between the sealing pressing member 605 and the valve needle sealing ring 606 is equal to the diameter of the outlet pipeline 8, and the distance between the sealing pressing member 605 and the valve needle sealing ring 606 is called as the volume in the closed space of the back pressure valve, compared with the back pressure valve in the prior art, the volume in the closed space of the back pressure valve is greatly reduced, and the volume in the closed space of the back pressure valve is a problem which is neglected for a long time, the inventor of the present application finds that under the requirements of high-pressure and high-precision instruments, the volume in the closed space of the back pressure valve is a very important problem, gas and liquid can be compressed under high pressure, when the compressed space of the gas or the liquid is very large, the space becomes a damping system, when the pressure of the back pressure valve is adjusted, the pressure display is not high or low, which makes the back pressure valve difficult to be controlled accurately, especially when a testing instrument equipped with the back pressure valve is used for testing a certain index, if the tested index is related to the volume of gas or liquid, the volume of gas or liquid which changes continuously along with the pressure change can make the testing process become very complicated and even fail.
As shown in fig. 3, in one possible implementation, the drive mechanism 4 comprises: a reduction motor 401; the output end of the speed reducing motor 401 is connected with the first end of the coupler 402, and the pressure adjusting nut 3 is connected with the second end of the coupler 402.
In the implementation process, the driving mechanism 4 comprises a speed reducing motor 401 and a coupler 402, two ends of the coupler 402 are connected with the output ends of the pressure adjusting nut 3 and the speed reducing motor 401 respectively, the controller controls the speed reducing motor 401 to rotate, and the output end of the speed reducing motor 401 drives the pressure adjusting nut 3 to rotate, so that the pressure value inside the back pressure valve body 1 is adjusted to a target pressure value.
As shown in fig. 3, in one possible implementation, the automatic back pressure valve 100 further includes: the back pressure valve comprises a base plate 10, wherein a back pressure valve fixing seat 11 is arranged at one end of the base plate 10 in the length direction, an installation groove matched with a back pressure valve body 1 is formed in the back pressure valve fixing seat 11, and the back pressure valve body 1 is embedded in the installation groove and fixedly connected with the back pressure valve fixing seat 11; a first slide rail 12 and a second slide rail 13 which are located at the other end of the bottom plate 10 in the length direction and are arranged on both sides of the bottom plate 10 in the width direction in parallel; the first sliding block 14 and the second sliding block 15 are respectively connected with the first sliding rail 12 and the second sliding rail 13 in a sliding mode, the coupler 402 is connected with the first sliding block 14 and the second sliding block 15, and when the coupler 402 rotates to drive the pressure adjusting nut 3 to rotate and move along the length direction of the bottom plate 10, the coupler 402 drives the first sliding block 14 and the second sliding block 15 to respectively move along the first sliding rail 12 and the second sliding rail 13.
In the above implementation, the automatic back pressure valve 100 further comprises: the back pressure valve comprises a base plate 10, a back pressure valve fixing seat 11 is arranged on the base plate 10 and used for installing a back pressure valve body 1, specifically, an installation groove is formed in the back pressure valve fixing seat 11, the back pressure valve body 1 is embedded in the installation groove and fixed on the back pressure valve fixing seat 11 through a fastener (such as a screw), a pressure adjusting nut 3 is arranged above the base plate 10 and arranged along the length direction of the base plate 10, one end of the pressure adjusting nut 3 is connected with the back pressure valve body 1, the other end of the pressure adjusting nut is connected with a coupler 402, a first sliding rail 12 and a second sliding rail 13 which are parallel to each other are further arranged on the base plate 10 and are arranged on two sides of the width direction of the base plate 10, a first sliding block 14 and a second sliding block 15 are connected on the coupler 402, the first sliding block 14 and the second sliding block 15 are respectively connected with the first sliding rail 12 and the second sliding rail 13 in a sliding manner, when the output end of a speed reducing motor 401 drives the coupler 402 to rotate, the coupler 402 drives the pressure adjusting nut 3 to rotate, the pressure regulating nut 3 moves along the length of the base plate 10 to approach or move away from the back pressure valve body 1, at this time the pressure regulating nut 3 also drives the coupler 402 to move along the length of the base plate 10, and when the coupler 402 moves, the first slider 14 and the second slider 15 connected with the coupler 402 are suitable for moving along the first sliding rail 12 and the second sliding rail 13, so that the smoothness of the automatic back pressure valve 100 in pressure adjustment is ensured.
As shown in fig. 3, in one possible implementation, the automatic back pressure valve 100 further comprises: the connecting piece comprises a connecting plate 16 and a mounting plate 17 vertically connected with one end of the connecting plate 16, the connecting plate 16 is positioned above the first sliding block 14 and the second sliding block 15 and is fixedly connected with the first sliding block 14 and the second sliding block 15, a groove matched with the coupler 402 is formed in the mounting plate 17, and the coupler 402 is arranged in the groove in a penetrating manner; and the motor fixing plate 18 is fixedly connected with the mounting plate 17, the speed reducing motor 401 is connected with the motor fixing plate 18, and the first end of the coupler 402 penetrates through the motor fixing plate 18 to be connected with the output end of the speed reducing motor 401.
In the above implementation process, the automatic back pressure valve 100 further comprises a connecting member and a motor fixing plate 18, the connecting member comprises a connecting plate 16 and a mounting plate 17 vertically connected with the connecting plate 16, wherein, the connecting plate 16 is arranged parallel to the axial direction of the coupler 402 and is connected with the first slide block 14 and the second slide block 15, the mounting plate 17 is provided with a groove matched with the coupler 402, the motor fixing plate 18 is fixedly connected with the mounting plate 17, and the motor fixing plate 18 is provided with a mounting hole communicated with the groove on the mounting plate 17, the reducing motor 401 is connected with the motor fixing plate 18, the first section of the coupler 402 sequentially passes through the groove and the mounting hole to be connected with the output end of the reducing motor 401, the second end of the coupler 402 is connected with the pressure adjusting nut 3, this makes the automatic back pressure valve 100 more stable when performing pressure adjustment, preventing accidental movement of the various components.
As shown in fig. 3, in a possible implementation, the automatic back pressure valve 100 further comprises: the moving plate 19 is fixedly connected to the motor fixing plate 18; the photoelectric switch 20 is fixedly connected to the bottom plate 10 and electrically connected with the driving mechanism 4, and when the moving plate 19 and the photoelectric switch 20 are both located at the same position in the length direction of the bottom plate 10, the pressure adjusting mechanism is configured as an initial position, and the pressure value is zero; when the set value is zero, the pressure adjusting mechanism rotates and moves along the length direction of the bottom plate 10, and when the moving plate 19 moves to be at the same position as the photoelectric switch 20, the photoelectric switch 20 controls the driving mechanism 4 to stop operating.
In the above implementation, the automatic back pressure valve 100 further comprises: the movable plate 19 and the photoelectric switch 20 are fixed, specifically, the movable plate 19 is fixedly connected to the motor fixing plate 18, when the first slider 14 and the second slider 15 drive the connecting piece and the motor fixing plate 18 to move, the movable plate 19 also moves synchronously with the motor fixing plate 18, the photoelectric switch 20 is arranged on the bottom plate 10 and electrically connected with the driving mechanism 4, when the pressure adjusting mechanism is at an initial position, the movable plate 19 and the photoelectric switch 20 are located at the same position in the length direction of the bottom plate 10, at this time, the pressure value inside the back pressure valve body 1 is zero, and the automatic back pressure valve 100 is in an initial state. When the automatic back pressure valve 100 performs pressure adjustment, the moving plate 19 is far away from the photoelectric switch 20, when a user needs to restore the pressure adjusting mechanism to the initial position, the user only needs to input an instruction with a set value of zero to the controller, at this time, the controller controls the driving mechanism 4 to rotate and move along the length direction of the bottom plate 10, when the moving plate 19 moves to the same position as the photoelectric switch 20, at this time, the photoelectric switch 20 automatically controls the driving mechanism 4 to stop running, so that the pressure adjusting mechanism is restored to the initial position, and the user can conveniently, quickly and accurately restore the automatic back pressure valve 100 to the initial state.
As shown in fig. 3, in a possible implementation, the driving mechanism 4 further comprises: one end of the gripper 403 is connected to the second end of the coupling 402, and the other end of the gripper 403 is held on the outer peripheral side of the pressure adjusting nut 3.
In the implementation process, the second end of the coupler 402 is connected with the gripper 403, the gripper 403 is clamped on the outer periphery of the pressure adjusting nut 3, and the coupler 402 drives the gripper 403 to rotate, so as to drive the pressure adjusting nut 3 to rotate.
In a second aspect, the embodiments of the present application further provide a fluid dosing system comprising an automatic back pressure valve 100 as claimed in any one of claims 1 to 9.
The fluid metering dosing system provided in the second aspect of the present application includes the automatic back pressure valve 100 according to any one of the first aspect of the present application, so that the technical effects of any one of the above embodiments are achieved, and the details are not repeated herein.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. An automatic back pressure valve, comprising:
a back pressure valve body;
the pressure sensor is arranged inside the back pressure valve body and positioned at the outlet end of the back pressure valve body, and the pressure sensor is used for detecting the pressure value inside the back pressure valve body;
the pressure adjusting mechanism comprises a pressure adjusting nut, a driving mechanism and a controller, wherein the driving mechanism is connected with the pressure adjusting nut, the controller is electrically connected with the driving mechanism, the pressure adjusting nut is connected with the back pressure valve body, the controller is electrically connected with the pressure sensor and receives the pressure value, and the controller controls the driving mechanism to drive the pressure adjusting nut to rotate so as to automatically adjust the pressure value to be a set value.
2. The automatic back pressure valve of claim 1, wherein the back pressure valve body comprises:
a chamber;
the sealing assembly is arranged in the cavity;
the inlet pipeline is arranged in the cavity, and the outlet end of the inlet pipeline is abutted to the sealing component;
the outlet pipeline is arranged on the cavity, the outlet end of the outlet pipeline is arranged on the side wall of the cavity, and fluid media enter the inlet pipeline and extrude the sealing assembly to communicate the inlet pipeline with the outlet pipeline.
3. The automatic back pressure valve of claim 2, wherein the sealing assembly comprises:
the sealing ring is arranged at the outlet end of the inlet pipeline and is communicated with the inlet pipeline;
the first end of the spring is connected with the pressure adjusting nut;
the valve needle structure comprises a valve needle and a pressure spring pad, one end of the pressure spring pad is connected with the second end of the spring, the other end of the pressure spring pad is connected with one end of the valve needle, the valve needle extends along the length direction of the cavity, and the other end of the valve needle points to the sealing ring;
the spring is compressed or stretched and pushes the valve needle to press the sealing ring or move away from the sealing ring so as to seal off or open the outlet end of the inlet pipeline.
4. The automatic back pressure valve of claim 3, wherein the seal assembly further comprises:
the sealing pressing piece is arranged on one side, away from the inlet pipeline, of the sealing ring, and the valve needle penetrates through the sealing pressing piece and is abutted to the sealing ring;
the valve needle sealing ring is sleeved on the outer peripheral side of the valve needle and is abutted with the side wall of the cavity;
and the distance between the sealing pressing piece and the valve needle sealing ring is equal to the diameter of the outlet pipeline.
5. The automatic back pressure valve of any of claims 1-3, wherein the drive mechanism comprises:
a reduction motor;
the output end of the speed reducing motor is connected with the first end of the coupler, and the pressure adjusting nut is connected with the second end of the coupler.
6. The automatic back pressure valve of claim 5, further comprising:
the back pressure valve comprises a base plate, a back pressure valve fixing seat and a valve body, wherein one end of the base plate in the length direction is provided with the back pressure valve fixing seat, the back pressure valve fixing seat is provided with an installation groove matched with the back pressure valve body, and the back pressure valve body is embedded in the installation groove and is fixedly connected with the back pressure valve fixing seat;
the first sliding rail and the second sliding rail are positioned at the other end of the bottom plate in the length direction and are arranged on two sides of the bottom plate in the width direction in parallel;
the first sliding block and the second sliding block are connected with the first sliding rail and the second sliding rail in a sliding mode respectively, the coupler is connected with the first sliding block and the second sliding block, the coupler rotates to drive the pressure adjusting nut to rotate and move along the length direction of the bottom plate, and the coupler drives the first sliding block and the second sliding block to move along the first sliding rail and the second sliding rail respectively.
7. The automatic back pressure valve of claim 6, further comprising:
the connecting piece comprises a connecting plate and a mounting plate vertically connected with one end of the connecting plate, the connecting plate is positioned above the first sliding block and the second sliding block and is fixedly connected with the first sliding block and the second sliding block, a groove matched with the coupler is formed in the mounting plate, and the coupler is arranged in the groove in a penetrating mode;
the motor fixing plate is fixedly connected with the mounting plate, the speed reduction motor is connected with the motor fixing plate, and the first end of the coupler penetrates through the motor fixing plate and is connected with the output end of the speed reduction motor.
8. The automatic back pressure valve of claim 7, further comprising:
the moving plate is fixedly connected to the motor fixing plate;
the photoelectric switch is fixedly connected to the bottom plate and electrically connected with the driving mechanism, when the moving plate and the photoelectric switch are both located at the same position in the length direction of the bottom plate, the pressure adjusting mechanism is configured to be at an initial position, and the pressure value is zero;
when the set value is zero, the pressure adjusting mechanism rotates and moves along the length direction of the bottom plate, and the photoelectric switch controls the driving mechanism to stop running when the moving plate moves to the same position as the photoelectric switch.
9. The automatic back pressure valve of claim 5, wherein the drive mechanism further comprises:
and one end of the mechanical claw is connected with the second end of the coupler, and the other end of the mechanical claw is clamped on the outer peripheral side of the pressure adjusting nut.
10. A fluid dosing system comprising an automatic back pressure valve as claimed in any one of claims 1 to 9.
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| CN202210426889.4A CN114791050B (en) | 2022-04-21 | 2022-04-21 | Automatic back pressure valve and fluid metering and adding system |
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| CN202210426889.4A CN114791050B (en) | 2022-04-21 | 2022-04-21 | Automatic back pressure valve and fluid metering and adding system |
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| CN114791050B (en) | 2024-06-04 |
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