CN110043799B - Pressure regulating device, use method thereof and pressure regulating system - Google Patents
Pressure regulating device, use method thereof and pressure regulating system Download PDFInfo
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- CN110043799B CN110043799B CN201910183301.5A CN201910183301A CN110043799B CN 110043799 B CN110043799 B CN 110043799B CN 201910183301 A CN201910183301 A CN 201910183301A CN 110043799 B CN110043799 B CN 110043799B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Abstract
The invention relates to the field of pressure regulating equipment, and provides a pressure regulating device, a use method thereof and a pressure regulating system. The pressure regulating device comprises an air storage chamber, a driving unit and a first valve; a push plate is arranged in the air storage chamber, the side wall of the push plate is in sliding seal fit with the inner wall of the air storage chamber so as to divide the air storage chamber into a fluid cavity and an adjusting cavity, and the fluid cavity is used for storing fluid media; the driving unit is connected with the push plate through a push rod and is used for driving the push plate to move along the length direction of the air storage chamber; the first end of the first valve is communicated with the fluid cavity through a fluid pipeline, and the second end of the first valve is used for being communicated with an external pressure cavity to be regulated. The pressure regulating system comprises a master controller and a plurality of pressure regulating devices. The method can not only provide positive pressure but also provide negative pressure to the external pressure cavity, thereby realizing multiple purposes and greatly reducing the cost.
Description
Technical Field
The invention relates to the field of pressure regulating equipment, in particular to a pressure regulating device, a using method thereof and a pressure regulating system.
Background
Currently, the pressure regulating devices of the prior art have a relatively small pressure regulating range and can only provide positive or negative pressure to the external pressure chamber to be regulated. Taking the most widely used compressor and vacuum pump in the market as an example, since the compressor can only provide positive pressure and the vacuum pump can only provide negative pressure, the compressor and the vacuum pump must be equipped at the same time for occasions requiring positive pressure and negative pressure, which inevitably increases the complexity of the system structure and increases the cost.
Disclosure of Invention
The invention aims to solve the technical problems that the pressure regulating range of the existing pressure regulating equipment is small, the pressure regulating equipment can only provide positive pressure or negative pressure under the fixed hardware configuration, and the system structure is complex and the cost is high due to the simultaneous realization of positive and negative pressure regulation.
In order to solve the above problems, the present invention provides a pressure regulating device, comprising an air reservoir, a driving unit and a first valve; a push plate is arranged in the air storage chamber, the side wall of the push plate is in sliding seal fit with the inner wall of the air storage chamber so as to divide the air storage chamber into a fluid cavity and an adjusting cavity, and the fluid cavity is used for storing fluid media; the driving unit is connected with the push plate through a push rod and is used for driving the push plate to move along the length direction of the air storage chamber; the first end of the first valve is communicated with the fluid cavity through a fluid pipeline, and the second end of the first valve is used for being communicated with an external pressure cavity to be regulated.
The driving unit comprises a lead screw and a motor, and the motor is connected with the lead screw and used for driving the lead screw to rotate; the screw rod is screwed with a nut in threaded fit with the screw rod, and the push rod is connected with the nut.
The driving unit further comprises a transmission rod and a screw sleeve sleeved outside the screw, one end of the transmission rod is connected with the push rod, and the other end of the transmission rod extends into the screw sleeve to be connected with the nut; the transmission rod is coaxial or parallel to the push rod.
The device also comprises a second valve, wherein the first end of the second valve is communicated with the fluid pipeline, and the second end of the second valve is used for being communicated with the atmosphere or an external water source.
The valve further comprises a controller, a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is arranged at the second end of the first valve, and the second pressure sensor is arranged on the fluid pipeline; the first pressure sensor, the second pressure sensor, the first valve, the second valve and the driving unit are electrically connected with the controller respectively.
The method comprises the following steps:
when in inflation:
s1.1, opening the first valve, closing the second valve, and skipping to execute the step S1.2;
s1.2, acquiring the fluid pressure of the external pressure cavity through the first pressure sensor, and skipping to execute the step S1.3;
s1.3, judging whether the fluid pressure of the external pressure cavity is smaller than a preset inflation pressure, if so, skipping to execute the step S1.4, and otherwise, skipping to execute the step S1.5;
s1.4, starting the driving unit to drive the push plate to move towards the first end of the air storage chamber, and jumping to execute the step S1.2; wherein the first end of the air reservoir is the end of the air reservoir adjacent to the fluid conduit;
s1.5, closing the first valve and the driving unit, and skipping to execute the step S1.2.
Wherein, still include the following step:
when in air release:
s2.1, opening the first valve, closing the second valve, and skipping to execute the step S2.2;
s2.2, acquiring the fluid pressure of the external pressure cavity through the first pressure sensor, and skipping to execute the step S2.3;
s2.3, judging whether the fluid pressure of the external pressure cavity is larger than a preset deflation pressure, if so, skipping to execute the step S2.4, otherwise, skipping to execute the step S2.5;
s2.4, starting the driving unit to drive the push plate to move towards the second end of the air storage chamber, and jumping to execute the step S2.2; wherein the second end of the air reservoir is the end of the air reservoir away from the fluid conduit;
s2.5, closing the first valve and the driving unit, and skipping to execute the step S2.2.
Wherein, still include the following step:
when tonifying qi:
s3.1, acquiring the position information of the push plate, and skipping to execute the step S3.2;
s3.2, judging whether the push plate reaches the first end of the air storage chamber, if so, skipping to execute the step S3.3, and if not, skipping to execute the step S3.1;
s3.3, acquiring the fluid pressure of the external pressure cavity through the first pressure sensor, and skipping to execute the step S3.4;
s3.4, judging whether the fluid pressure of the external pressure cavity is smaller than the preset fluid pressure, if so, skipping to execute the step S3.5, otherwise, skipping to execute the step S3.3;
s3.5, closing the first valve, opening the second valve, and skipping to execute the step S3.6;
s3.6, starting the driving unit to drive the push plate to move towards the second end of the air storage chamber, and jumping to execute the step S3.7;
s3.7, judging whether the starting time of the driving unit is less than the preset air supplementing time, if so, skipping to execute the step S3.6, and if not, skipping to execute the step S3.8;
s3.8, closing the second valve, and skipping to execute the step S3.9;
s3.9, starting the driving unit to drive the push plate to move towards the first end of the air storage chamber, and jumping to execute the step S3.10;
s3.10, acquiring the fluid pressure of the fluid cavity through the second pressure sensor, and jumping to execute the step S3.11;
s3.11, judging whether the fluid pressure of the fluid cavity is smaller than the fluid pressure of the external pressure cavity, if so, skipping to execute the step S3.10, otherwise, skipping to execute the step S3.12;
s3.12, opening the first valve, starting the driving unit to drive the push plate to move towards the first end of the air storage chamber, and jumping to execute the step S3.1.
Wherein, before executing step S1.1, the following steps are also included:
s1.0, setting the preset inflation pressure on the controller, and skipping to execute the step S1.1;
before step S2.1 is executed, the following steps are also included:
s2.0, setting the preset deflation pressure on the controller, and skipping to execute the step S2.1;
before step S3.1 is executed, the following steps are also included:
and S3.0, setting the preset air replenishing time and the preset fluid pressure on the controller, and skipping to execute the step S3.1.
In order to solve the problems, the invention also provides a pressure regulating system which comprises a master controller and a plurality of pressure regulating devices, wherein all the controllers are electrically connected with the master controller.
The invention has simple structure, convenient operation and large pressure adjusting range, and when the external pressure cavity needs to increase pressure, namely, inflation: the first valve can be opened to communicate the external pressure cavity with the fluid cavity; and then starting the driving unit to drive the push plate to move towards the first end of the air storage chamber, namely the end of the air storage chamber close to the fluid pipeline. As the fluid medium stored in the fluid chamber is gradually pressed into the outer pressure chamber, the fluid pressure in the outer pressure chamber increases. When the external pressure chamber needs to be depressurized, i.e. deflated: the first valve can be opened to communicate the external pressure cavity with the fluid cavity; the drive unit is then activated to drive the push plate towards the second end of the air reservoir, i.e. the end of the air reservoir remote from the fluid conduit. As the fluid medium stored in the external pressure chamber is gradually drawn into the fluid chamber, the fluid pressure in the external pressure chamber is reduced. Therefore, the invention not only can provide positive pressure to the external pressure cavity, but also can provide negative pressure to the external pressure cavity, thereby realizing multiple purposes of one machine and greatly reducing the cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pressure regulating device in embodiment 1 of the present invention;
FIG. 2 is a schematic view showing the installation of the air reservoir and the drive unit in embodiment 1 of the present invention;
FIG. 3 is a schematic view showing another installation of the air reservoir and the drive unit in embodiment 1 of the present invention;
fig. 4 is a partial structural schematic view of a pressure regulating device in embodiment 1 of the present invention;
FIG. 5 is a schematic view of the inflation of the pressure-regulating device in embodiment 1 of the invention;
FIG. 6 is a schematic view of air bleeding of the pressure regulating means in embodiment 1 of the present invention;
FIG. 7 is a schematic diagram of the pressure regulating device for supplying air in embodiment 1 of the present invention;
FIG. 8 is a flowchart of a method of using the pressure-adjusting device during inflation in embodiment 2 of the present invention;
FIG. 9 is a flow chart showing a method of using the pressure regulating means during air bleeding in embodiment 2 of the present invention;
FIG. 10 is a flowchart of a method for using the pressure regulating device during air compensation according to embodiment 2 of the present invention;
fig. 11 is a schematic structural diagram of a voltage regulation system in embodiment 3 of the present invention.
Reference numerals:
1. an air storage chamber; 1-1, a fluid cavity; 1-2, adjusting the cavity;
1-3, a first end of an air reservoir; 1-4, a second end of the air reservoir; 2. pushing the plate;
3. a push rod; 4. a drive unit; 4-1, a motor; 4-2, a screw sleeve;
4-3, a transmission rod; 5. a first valve; 6. an external pressure chamber; 7. a fluid conduit;
8. a second valve; 9. a controller; 10. a first pressure sensor;
11. a second pressure sensor; 12. a power source; 13. a master controller; 14. a housing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
It is to be understood that, unless otherwise expressly stated or limited, the term "coupled" is used in a generic sense as defined herein, e.g., fixedly attached or removably attached or integrally attached; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a pressure regulating device including an air reservoir 1, a driving unit 4, and a first valve 5; a push plate 2 is arranged in the air storage chamber 1, the side wall of the push plate 2 is in sliding seal fit with the inner wall of the air storage chamber 1 so as to divide the air storage chamber 1 into a fluid cavity 1-1 and an adjusting cavity 1-2, and the fluid cavity 1-1 is used for storing fluid media; the driving unit 4 is connected with the push plate 2 through the push rod 3 and is used for driving the push plate 2 to move along the length direction of the air storage chamber 1; a first valve 5 has a first end communicating with the fluid chamber 1-1 via a fluid conduit 7 and a second end for communicating with an external pressure chamber 6 to be regulated. Wherein the fluid medium is gas or liquid.
As shown in fig. 5, when the external pressure chamber 6 needs to be pressurized, i.e. inflated: first, the first valve 5 is opened to communicate the external pressure chamber 6 with the fluid chamber 1-1; the drive unit 4 is then activated to drive the push plate 2 towards the first end 1-3 of the air reservoir, i.e. the end of the air reservoir 1 adjacent to the fluid conduit 7. As the push plate 2 approaches the first end 1-3 of the air reservoir, i.e. as the volume of the fluid chamber 1-1 decreases and the volume of the adjustment chamber 1-2 increases, the fluid medium stored in the fluid chamber 1-1 is pressed into the external pressure chamber 6. Finally, the first valve 5 and the drive unit 4 are closed when the fluid pressure in the external pressure chamber 6 reaches the preset inflation pressure. At this time, the external pressure chamber 6 is disconnected from the air reservoir 1, and the external pressure chamber 6 is in a fully closed state, so that the fluid pressure in the external pressure chamber 6 can be stably maintained at the preset inflation pressure.
As shown in fig. 6, when the external pressure chamber 6 needs to be reduced in pressure, i.e. deflated: first, the first valve 5 is opened to communicate the external pressure chamber 6 with the fluid chamber 1-1; the drive unit 4 is then activated to drive the push plate 2 towards the second end 1-4 of the air reservoir, i.e. the end of the air reservoir 1 remote from the fluid conduit 7. As the push plate 2 approaches the second end 1-4 of the air reservoir, i.e. as the volume of the fluid chamber 1-1 increases and the volume of the adjustment chamber 1-2 decreases, the fluid medium stored in the external pressure chamber 6 is drawn into the fluid chamber 1-1. Finally, the first valve 5 and the drive unit 4 are closed when the fluid pressure in the external pressure chamber 6 reaches the preset deflation pressure. At this time, the external pressure chamber 6 is disconnected from the air reservoir 1, and the external pressure chamber 6 is in a fully closed state, so that the fluid pressure in the external pressure chamber 6 can be stably maintained at the preset inflation pressure.
It should be noted that, in practical use, the fluid pressure in the external pressure cavity 6 may be directly detected to determine whether the fluid pressure meets the requirement, or the position information of the push plate 2 may be detected to determine whether the fluid pressure in the external pressure cavity 6 meets the requirement. The position information of the push plate 2 can be determined by the starting time of the driving unit 4, or by providing a position sensor on the push plate 2.
Further, in order to facilitate the movement, the pressure regulating device further comprises a housing 14, and the air reservoir 1, the driving unit 4 and the first valve 5 are all arranged in the housing 14.
Preferably, the driving unit 4 is a nut-screw mechanism, specifically, the driving unit 4 includes a screw and a motor 4-1, and the motor 4-1 is connected with the screw and is used for driving the screw to rotate; the screw rod is screwed with a nut which is in threaded fit with the screw rod, and the push rod 3 is connected with the nut. Further, in order to avoid the lead screw being exposed outside for a long time and being damaged or scratching operators, the driving unit 4 further comprises a transmission rod 4-3 and a lead screw sleeve 4-2 sleeved outside the lead screw, the push rod 3 is connected with the nut through the transmission rod 4-3, namely, one end of the transmission rod 4-3 is connected with the push rod 3, and the other end of the transmission rod extends into the lead screw sleeve 4-2 to be connected with the nut; the transmission rod 4-3 is coaxial or parallel to the push rod 3.
The working principle of the driving unit 4 is explained below by taking the driving rod 4-3 and the push rod 3 as an example: when inflation is required, the motor 4-1 is started to drive the lead screw to rotate forwards. Since the screw rod is screwed with the nut which is in threaded fit with the screw rod, when the screw rod rotates forwards, the nut moves leftwards along the axial direction of the screw rod. Meanwhile, the push rod 3 is connected with the nut through the transmission rod 4-3, so that the nut moves and simultaneously drives the push rod 3 to synchronously move leftwards, and the push plate 2 can gradually approach to the second end 1-4 of the air storage chamber. On the contrary, when the screw rod rotates reversely, the nut drives the push rod 3 to move rightwards together, and the push plate 2 can gradually approach the first end 1-3 of the air storage chamber.
Similarly, when the transmission rod 4-3 is arranged parallel to the push rod 3, that is, when the air reservoir 1 is located above or below the screw housing 4-2: if the nut moves towards the left along the axial direction of the screw rod under the driving of the motor 4-1, the push plate 2 gradually approaches to the first end 1-3 of the air storage chamber; if the nut moves towards the right along the axial direction of the screw rod under the driving of the motor 4-1, the push plate 2 gradually approaches the second end 1-4 of the air storage chamber. Compared with the mode that the transmission rod 4-3 and the push rod 3 are coaxially arranged, the transmission rod 4-3 and the push rod 3 are arranged in parallel, so that the occupied space of the whole pressure regulating device can be obviously reduced, and the whole device is more compact.
In addition, when the preset inflation pressure of the external pressure cavity 6 is relatively high, the external pressure cavity 6 leaks air or the pressure regulating device leaks air, the problem of insufficient air storage capacity in the air storage chamber 1 may occur, that is, when the push plate 2 reaches the first end 1-3 of the air storage chamber, namely the volume of the fluid cavity 1-1 becomes zero, the fluid pressure in the external pressure cavity 6 still cannot reach the preset fluid pressure, so that the air storage chamber 1 can be supplemented with air in time, the pressure regulating device further comprises a second valve 8, the first end of the second valve 8 is communicated with the fluid pipeline 7, and the second end is communicated with the atmosphere or an external water source. Thus, as shown in fig. 7, when the air reservoir 1 needs to be replenished with air: firstly, closing the first valve 5 and opening the second valve 8 to communicate the fluid chamber 1-1 with the atmosphere or an external water source; the drive unit 4 is then activated to drive the push plate 2 towards the second end 1-4 of the air reservoir, i.e. the end of the air reservoir 1 remote from the fluid conduit 7. As the push plate 2 approaches the second end 1-4 of the air reservoir, that is, as the volume of the fluid chamber 1-1 increases and the volume of the adjustment chamber 1-2 decreases, the external air or the external water source is drawn into the fluid chamber 1-1. When the volume of the fluid chamber 1-1 is increased to a certain extent, the second valve 8 is closed and the driving unit 4 is started, so that the driving unit 4 drives the push plate 2 to move towards the first end 1-3 of the air storage chamber, namely the end of the air storage chamber 1 close to the fluid pipeline 7. Since both the first valve 5 and the second valve 8 are closed at this time, the pressure of the fluid in the fluid chamber 1-1 is increased as the volume of the fluid chamber 1-1 is gradually decreased. When the fluid pressure in the fluid cavity 1-1 is not less than the fluid pressure in the external pressure cavity 6, the first valve 5 is opened, the driving unit 4 is started, the driving unit 4 drives the push plate 2 to move towards the first end 1-3 of the air storage chamber, so that the fluid newly filled in the fluid cavity 1-1 is pressed into the external pressure cavity 6 until the fluid pressure in the external pressure cavity 6 is increased to the preset fluid pressure.
Preferably, in order to further improve the adjustment precision and realize automatic control, the pressure adjusting device further comprises a controller 9, a first pressure sensor 10, a second pressure sensor 11 and a power supply 12 electrically connected with the controller 9, wherein the first pressure sensor 10 is arranged at the second end of the first valve 5, and the second pressure sensor 11 is arranged on the fluid pipeline 7; the first pressure sensor 10, the second pressure sensor 11, the first valve 5, the second valve 8, and the driving unit 4 are electrically connected to the controller 9, respectively. The first valve 5 and the second valve 8 may be, but are not limited to, solenoid valves.
Before inflation, the operator can directly set a preset inflation pressure on the controller 9. During inflation, after the controller 9 controls the first valve 5 to be opened and the second valve 8 to be closed, the first pressure sensor 10 sends the fluid pressure of the external pressure cavity 6 monitored in real time to the controller 9: if the fluid pressure of the external pressure cavity 6 is less than the preset inflation pressure, the controller 9 controls the driving unit 4 to drive the push plate 2 to move towards the first end 1-3 of the air storage chamber so as to reduce the volume of the fluid cavity 1-1; wherein the first end 1-3 of the air reservoir is the end of the air reservoir 1 adjacent to the fluid conduit 7. If the fluid pressure of the external pressure chamber 6 is not less than the preset inflation pressure, the controller 9 controls the first valve 5 and the driving unit 4 to close. At this time, the external pressure cavity 6 and the air storage chamber 1 are disconnected, the external pressure cavity 6 is in a fully closed state, and the fluid pressure in the external pressure cavity 6 can be stably kept at the preset inflation pressure.
Of course, the controller 9 may also monitor the volume change of the external pressure chamber 6 in real time during the inflation process using the monitoring result of the first pressure sensor 10 and the moving stroke of the push plate 2. Taking gas as the fluid medium as an example, assuming that the fluid medium is an ideal gas, the gas flow process is an adiabatic process, and the influence of high frequency components such as the fluid pipeline 7, the viscous resistance of the gas flow, and the numbers I/O, D/A, A/D is neglected. V can be obtained according to the state equation of ideal gasP2：
P1*(L1*S+VP1)＝P2*(L2*S+VP2) (1)；
Wherein, P1Indicating the fluid pressure of the outer pressure chamber 6 in the initial state; l is1The length of the fluid cavity 1-1 in the initial state is shown, namely the distance between the first end 1-3 of the air storage chamber and the push plate 2; vP1Represents the volume of the external pressure chamber 6 in the initial state; p2Indicating the fluid pressure of the outer pressure chamber 6 in the present state; l is2The length of the fluid cavity 1-1 in the current state is shown, namely the distance between the first end 1-3 of the air storage chamber and the push plate 2; vP2Represents the volume of the external pressure chamber 6 in the present state; s represents the longitudinal sectional area of the fluid chamber 1-1, i.e. the air storage chamber 1; d represents the diameter of the fluid chamber 1-1, i.e. the air reservoir 1.
In the above parameters P1、L1、VP1And D are both known values, P2Obtainable by the first pressure sensor 10; l is2Can be obtained by the driving time and the driving speed of the driving unit 4, for example, when the driving unit 4 is a nut-screw mechanism, the controller 9 can calculate the moving distance of the push plate 2 in the air storage chamber 1 according to the rotating speed of the motor 4-1 and the starting time of the motor 4-1, and then can obtain L2。
It should be noted that the maximum pressure that the pressure regulating device can provide to the outside is related to the pressure-resistant range of the first valve 5, the maximum stroke of the motor 4-1 and the volume of the air reservoir 1, specifically:
it is assumed that the volume change of the outer pressure chamber 6 during inflation is negligible, i.e.
VP1＝VP2Meanwhile, it is assumed that: vP1＝VP2＝k*L1*S (3)；
Wherein k is a natural number. Since the volume of the external pressure chamber 6 is usually much smaller than the volume of the air reservoir 1 in actual use, k <1/6 is preferred. Substituting the above equations (2) and (3) into equation (1) can obtain:
due to L2Indicating the length of the fluid chamber 1-1 in the current state, whereas the length of the fluid chamber 1-1 cannot be less than 0, so that if L is to be ensured2Greater than or equal to 0, i.e.
Then
Therefore, the pressure regulating device can provide the maximum pressure to the outside
The maximum thrust F exerted by the driving unit 4 on the push plate 2 is
In actual use, a worker can match the motor 4-1 with corresponding thrust and stroke and the air storage chamber 1 with corresponding volume in the pressure regulating device according to the actual required pressure regulating range.
Before deflation, the operator can set a preset deflation pressure directly on the controller 9. During deflation, after the controller 9 controls the first valve 5 to open and the second valve 8 to close, the first pressure sensor 10 sends the fluid pressure of the external pressure cavity 6 monitored in real time to the controller 9: if the fluid pressure of the external pressure cavity 6 is greater than the preset deflation pressure, the controller 9 controls the driving unit 4 to drive the push plate 2 to move towards the second end 1-4 of the air storage chamber so as to increase the volume of the fluid cavity 1-1; wherein the second end 1-4 of the air reservoir is the end of the air reservoir 1 remote from the fluid conduit 7. If the fluid pressure of the external pressure chamber 6 is not greater than the preset deflation pressure, the controller 9 controls the first valve 5 and the driving unit 4 to close. At this time, the external pressure cavity 6 and the air storage chamber 1 are disconnected, the external pressure cavity 6 is in a fully closed state, and the fluid pressure in the external pressure cavity 6 can be stably kept at the preset deflation pressure.
Therefore, in the embodiment, the pressure regulating device not only is convenient for regulating the pressure regulating range, but also can realize the pressure regulation from the negative pressure to the positive pressure.
During air supply, the operator can directly set the preset air supply time and the preset fluid pressure on the controller 9. When air is supplied, the controller 9 controls the first valve 5 to close and the second valve 8 to open so as to communicate the fluid chamber 1-1 with the atmosphere or an external water source. The drive unit 4 is then activated to drive the push plate 2 towards the second end 1-4 of the air reservoir, i.e. the end of the air reservoir 1 remote from the fluid conduit 7. As the push plate 2 approaches the second end 1-4 of the air reservoir, that is, as the volume of the fluid chamber 1-1 increases and the volume of the adjustment chamber 1-2 decreases, the external air or the external water source is drawn into the fluid chamber 1-1. When the starting time of the driving unit 4 reaches the preset air supplementing time, the second valve 8 is closed, the driving unit 4 is started, and the driving unit 4 drives the push plate 2 to move towards the first end 1-3 of the air storage chamber, namely the end of the air storage chamber 1 close to the fluid pipeline 7. Since both the first valve 5 and the second valve 8 are closed at this time, the pressure of the fluid in the fluid chamber 1-1 is increased as the volume of the fluid chamber 1-1 is gradually decreased. In the process, the second pressure sensor 11 sends the real-time monitored fluid pressure of the fluid chamber 1-1 to the controller 9, and if the fluid pressure of the fluid chamber 1-1 reaches the fluid pressure of the external pressure chamber 6, the controller 9 controls the first valve 5 to open and the driving unit 4 to start. At this time, the driving unit 4 may continue to drive the push plate 2 to move toward the first end 1-3 of the air storage chamber, so as to press the fluid newly filled in the fluid chamber 1-1 into the external pressure chamber 6 until the pressure of the fluid in the external pressure chamber 6 is increased to the preset fluid pressure.
Example 2
The embodiment provides a use method of a pressure regulating device, which comprises the following steps:
as shown in fig. 8, when inflated:
s1.0', initializing the device, and skipping to execute the step S1.0;
s1.0, setting a preset inflation pressure on a controller 9, and skipping to execute the step S1.1;
s1.1, opening a first valve 5, closing a second valve 8, and skipping to execute the step S1.2;
s1.2, acquiring the fluid pressure of the external pressure cavity 6 through the first pressure sensor 10, and skipping to execute the step S1.3;
s1.3, judging whether the fluid pressure of the external pressure cavity 6 is smaller than a preset inflation pressure, if so, skipping to execute the step S1.4, and otherwise, skipping to execute the step S1.5;
s1.4, starting a driving unit 4 to drive a push plate 2 to move towards a first end 1-3 of the air storage chamber, and jumping to execute the step S1.2; wherein, the first end 1-3 of the air storage chamber is the end of the air storage chamber 1 close to the fluid pipeline 7;
s1.5, closing the first valve 5 and the driving unit 4, and skipping to execute the step S1.2;
as shown in fig. 9, when deflated:
s2.0', initializing the device, and skipping to execute the step S2.0;
s2.0, setting a preset deflation pressure on the controller 9, and skipping to execute the step S2.1;
s2.1, opening the first valve 5, closing the second valve 8, and skipping to execute the step S2.2;
s2.2, acquiring the fluid pressure of the external pressure cavity 6 through the first pressure sensor 10, and skipping to execute the step S2.3;
s2.3, judging whether the fluid pressure of the external pressure cavity 6 is larger than a preset deflation pressure, if so, skipping to execute the step S2.4, otherwise, skipping to execute the step S2.5;
s2.4, starting the driving unit 4 to drive the push plate 2 to move towards the second end 1-4 of the air storage chamber, and jumping to execute the step S2.2; wherein, the second end 1-4 of the air storage chamber is the end of the air storage chamber 1 far away from the fluid pipeline 7;
s2.5, closing the first valve 5 and the driving unit 4, and skipping to execute the step S2.2;
as shown in fig. 10, when air is supplied:
s3.0', initializing the device, and skipping to execute the step S3.0;
s3.0, setting preset air supplementing time and preset fluid pressure on the controller 9, and skipping to execute the step S3.1;
s3.1, acquiring the position information of the push plate 2, and skipping to execute the step S3.2; it should be noted that the position information of the push plate 2 can be determined by the activation time of the driving unit 4, or by providing a position sensor on the push plate 2. For example, when the driving unit 4 is a nut-and-screw mechanism, the controller 9 can calculate the moving distance of the push plate 2 in the air storage chamber 1 according to the rotation speed of the motor 4-1 and the starting time of the motor 4-1, and further can obtain the position information of the push plate 2.
S3.2, judging whether the push plate 2 reaches the first end 1-3 of the air storage chamber, if so, skipping to execute the step S3.3, otherwise, skipping to execute the step S3.1;
s3.3, acquiring the fluid pressure of the external pressure cavity 6 through the first pressure sensor 10, and skipping to execute the step S3.4;
s3.4, judging whether the fluid pressure of the external pressure cavity 6 is smaller than the preset fluid pressure, if so, skipping to execute the step S3.5, otherwise, skipping to execute the step S3.3;
s3.5, closing the first valve 5, opening the second valve 8, and skipping to execute the step S3.6;
s3.6, starting the driving unit 4 to drive the push plate 2 to move towards the second end 1-4 of the air storage chamber, and jumping to execute the step S3.7;
s3.7, judging whether the starting time of the driving unit 4 is less than the preset air supplementing time, if so, skipping to execute the step S3.6, and if not, skipping to execute the step S3.8;
s3.8, closing the second valve 8, and skipping to execute the step S3.9;
s3.9, starting the driving unit 4 to drive the push plate 2 to move towards the first end 1-3 of the air storage chamber, and jumping to execute the step S3.10; since both the first valve 5 and the second valve 8 are closed at this time, the pressure of the fluid in the fluid chamber 1-1 is increased as the volume of the fluid chamber 1-1 is gradually decreased.
S3.10, acquiring the fluid pressure of the fluid cavity 1-1 through the second pressure sensor 11, and skipping to execute the step S3.11;
s3.11, judging whether the fluid pressure of the fluid cavity 1-1 is smaller than the fluid pressure of the external pressure cavity 6, if so, skipping to execute the step S3.10, otherwise, skipping to execute the step S3.12;
s3.12, opening the first valve 5, starting the driving unit 4 to drive the push plate 2 to move towards the first end 1-3 of the air storage chamber, and jumping to execute the step S3.1.
Example 3
As shown in fig. 11, the present embodiment provides a voltage regulating system, which includes an overall controller 13 and a plurality of voltage regulating devices as described above, and all the controllers 9 are electrically connected to the overall controller 13. Wherein the overall controller 13 can be but is not limited to a computer, and the controller 9 can be but is not limited to a PLC controller. The pressure regulating system can be applied to the fields of flexible robots, industrial production lines, medical auxiliary breathing devices and the like, and all the pressure regulating devices can be coordinately controlled by master control.
For example, when a pressure regulating system is installed on the pneumatic manipulator, a pressure regulating device may be connected to each of the pneumatic fingers of the pneumatic manipulator, and the overall controller 13 may charge/discharge air to/from each pneumatic hand to move it independently by sending commands individually to each controller 9.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the invention, but not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A pressure regulating device is characterized by comprising an air storage chamber, a driving unit, a first valve and a second valve; a push plate is arranged in the air storage chamber, the side wall of the push plate is in sliding seal fit with the inner wall of the air storage chamber so as to divide the air storage chamber into a fluid cavity and an adjusting cavity, and the fluid cavity is used for storing fluid media; the driving unit is connected with the push plate through a push rod and is used for driving the push plate to move along the length direction of the air storage chamber; a first end of the first valve is communicated with the fluid cavity through a fluid pipeline, and a second end of the first valve is used for being communicated with an external pressure cavity to be regulated; a first end of the second valve is in communication with the fluid conduit and a second end of the second valve is for communication with the atmosphere or an external water source.
2. The pressure regulating device of claim 1, wherein the driving unit comprises a lead screw and a motor, and the motor is connected with the lead screw and used for driving the lead screw to rotate; the screw rod is screwed with a nut in threaded fit with the screw rod, and the push rod is connected with the nut.
3. The pressure regulating device according to claim 2, wherein the driving unit further comprises a transmission rod and a screw sleeve sleeved outside the screw, one end of the transmission rod is connected with the push rod, and the other end of the transmission rod extends into the screw sleeve to be connected with the nut; the transmission rod is coaxial or parallel to the push rod.
4. The pressure regulating device of claim 1, further comprising a controller, a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is disposed at the second end of the first valve, and the second pressure sensor is disposed on the fluid conduit; the first pressure sensor, the second pressure sensor, the first valve, the second valve and the driving unit are electrically connected with the controller respectively.
5. The use method of the pressure regulating device according to claim 4, characterized by comprising the following steps:
when in inflation:
s1.1, opening the first valve, closing the second valve, and skipping to execute the step S1.2;
s1.2, acquiring the fluid pressure of the external pressure cavity through the first pressure sensor, and skipping to execute the step S1.3;
s1.3, judging whether the fluid pressure of the external pressure cavity is smaller than a preset inflation pressure, if so, skipping to execute the step S1.4, and otherwise, skipping to execute the step S1.5;
s1.4, starting the driving unit to drive the push plate to move towards the first end of the air storage chamber, and jumping to execute the step S1.2; wherein the first end of the air reservoir is the end of the air reservoir adjacent to the fluid conduit;
s1.5, closing the first valve and the driving unit, and skipping to execute the step S1.2;
when in air release:
s2.1, opening the first valve, closing the second valve, and skipping to execute the step S2.2;
s2.2, acquiring the fluid pressure of the external pressure cavity through the first pressure sensor, and skipping to execute the step S2.3;
s2.3, judging whether the fluid pressure of the external pressure cavity is larger than a preset deflation pressure, if so, skipping to execute the step S2.4, otherwise, skipping to execute the step S2.5;
s2.4, starting the driving unit to drive the push plate to move towards the second end of the air storage chamber, and jumping to execute the step S2.2; wherein the second end of the air reservoir is the end of the air reservoir away from the fluid conduit;
s2.5, closing the first valve and the driving unit, and skipping to execute the step S2.2.
6. The use method of the pressure regulating device according to claim 5, further comprising the steps of:
when tonifying qi:
s3.1, acquiring the position information of the push plate, and skipping to execute the step S3.2;
s3.2, judging whether the push plate reaches the first end of the air storage chamber, if so, skipping to execute the step S3.3, and if not, skipping to execute the step S3.1;
s3.3, acquiring the fluid pressure of the external pressure cavity through the first pressure sensor, and skipping to execute the step S3.4;
s3.4, judging whether the fluid pressure of the external pressure cavity is smaller than the preset fluid pressure, if so, skipping to execute the step S3.5, otherwise, skipping to execute the step S3.3;
s3.5, closing the first valve, opening the second valve, and skipping to execute the step S3.6;
s3.6, starting the driving unit to drive the push plate to move towards the second end of the air storage chamber, and jumping to execute the step S3.7;
s3.7, judging whether the starting time of the driving unit is less than the preset air supplementing time, if so, skipping to execute the step S3.6, and if not, skipping to execute the step S3.8;
s3.8, closing the second valve, and skipping to execute the step S3.9;
s3.9, starting the driving unit to drive the push plate to move towards the first end of the air storage chamber, and jumping to execute the step S3.10;
s3.10, acquiring the fluid pressure of the fluid cavity through the second pressure sensor, and jumping to execute the step S3.11;
s3.11, judging whether the fluid pressure of the fluid cavity is smaller than the fluid pressure of the external pressure cavity, if so, skipping to execute the step S3.10, otherwise, skipping to execute the step S3.12;
s3.12, opening the first valve, starting the driving unit to drive the push plate to move towards the first end of the air storage chamber, and jumping to execute the step S3.1.
7. The method of using a pressure regulating device of claim 6,
before step S1.1 is executed, the following steps are also included:
s1.0, setting the preset inflation pressure on the controller, and skipping to execute the step S1.1;
before step S2.1 is executed, the following steps are also included:
s2.0, setting the preset deflation pressure on the controller, and skipping to execute the step S2.1;
before step S3.1 is executed, the following steps are also included:
and S3.0, setting the preset air replenishing time and the preset fluid pressure on the controller, and skipping to execute the step S3.1.
8. A pressure regulating system comprising a master controller and a plurality of pressure regulating devices according to claim 4, all of said controllers being electrically connected to said master controller.
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| JPH08296607A (en) * | 1995-04-25 | 1996-11-12 | Smc Corp | Driving circuit of fluid pressure actuator |
| CN2861706Y (en) * | 2005-11-29 | 2007-01-24 | 郗腾来 | Easy automatic make-up device for pressure tank |
| CN102635587A (en) * | 2012-04-28 | 2012-08-15 | 汕头市甜甜乐糖果食品有限公司 | Gas supply control structure of cylinder |
| CN108732104B (en) * | 2018-04-18 | 2019-08-06 | 中国科学院合肥物质科学研究院 | A kind of photo-acoustic spectrometer on-line measuring device |
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