CN114458659A - High-pressure gas pressure micro-adjusting device - Google Patents
High-pressure gas pressure micro-adjusting device Download PDFInfo
- Publication number
- CN114458659A CN114458659A CN202210142560.5A CN202210142560A CN114458659A CN 114458659 A CN114458659 A CN 114458659A CN 202210142560 A CN202210142560 A CN 202210142560A CN 114458659 A CN114458659 A CN 114458659A
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- piston
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- fine adjustment
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- 230000000712 assembly Effects 0.000 claims abstract description 18
- 238000000429 assembly Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 230000033001 locomotion Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
Abstract
The invention discloses a high-pressure gas pressure fine adjustment device which comprises a cylinder barrel with a piston cavity, an air inlet and an air outlet which are arranged on the peripheral wall of the cylinder barrel and communicated with the piston cavity, a piston assembly arranged in the piston cavity, and a driving assembly for driving the piston assembly to reciprocate in the piston cavity, wherein the piston assembly is arranged in the piston cavity; the piston assembly comprises two sets of piston assemblies and a piston connecting piece arranged between the two sets of piston assemblies, the peripheral walls of the two sets of piston assemblies are respectively provided with a sealing assembly to be in sealing arrangement with the cylinder barrel, and a storage cavity which is only communicated with the air inlet or the air outlet simultaneously is formed between the two sets of piston assemblies. Through the mode, the high-pressure gas fine-tuning cylinder is simple in structure, the piston assemblies are driven by the driving assembly to do linear reciprocating motion in the cylinder barrel, so that the storage cavity formed between the piston assemblies is sequentially communicated with the gas inlet and the gas outlet, less gas input from the high-pressure end is transferred to the low-pressure end and then output, and fine tuning of the high-pressure gas is achieved.
Description
Technical Field
The invention relates to the technical field of gas pressure gradual adjustment, in particular to a high-pressure gas pressure fine adjustment device.
Background
The hydraulic regulation of the low-pressure end in the common mechanical equipment can be completed by matching a hydraulic pump and a servo valve, and the servo valve realizes the micro regulation of the pressure of the low-pressure end by controlling the volume of liquid leading to the low-pressure end. This is because the liquid has a high bulk compression modulus, the volume of liquid supplied through the servo valve is extremely small, and the flow rate is slow. However, this pressure regulation principle cannot be used for gas pressure regulation, particularly in the field of high-pressure gas pressure regulation. Because the flow rate of gas under high pressure is uncontrollable and the flow state is complicated, the conventional techniques and apparatuses are difficult to be applied to the regulation of the pressure of high pressure gas. However, the mechanical design scheme using high-pressure gas as power cannot be used for fine adjustment of pressure, and the technical problem of fine adjustment of the pressure of the high-pressure gas needs to be solved urgently.
The prior art provides a micro flow continuous regulating system under high pressure, which comprises a cooling structure, a high-pressure pump conveying structure and a flow regulating structure. The cooling structure comprises a cooling coil and a low-temperature tank. The cooling coil is arranged in the low-temperature tank, the front end of the cooling coil is connected with an external pipeline, and the rear end of the cooling coil is connected with one end of the inlet tee joint. The high-pressure pump conveying structure comprises an inlet tee joint, an inlet one-way valve, a high-pressure pump, an outlet tee joint, an outlet one-way valve, a pressure gauge tee joint and an outlet pressure gauge which are connected in sequence. One end of the inlet tee is connected with the rear end of the cooling coil or connected with an external pipeline. One end of the pressure gauge tee joint is connected with the flow regulating structure. The flow regulating structure comprises a high-pressure fine-tuning valve, a high-pressure fine-tuning metering valve and a flow restrictor which are connected in sequence. The high-pressure fine-tuning valve is connected with one end of the outlet tee joint, and the current limiter is connected with the inlet tee joint in the conveying structure of the high-pressure pump. Although the adjusting system can realize fine adjustment conveying of high-pressure gas, the whole structure is too complex, the cost is too high, the fine adjustment effect is poor, pressure fine adjustment can not be simultaneously performed on a plurality of hydraulic devices, and the limitation is large.
Therefore, it is necessary to design a fine adjustment device for high pressure gas pressure, which has a simple structure, a good fine adjustment effect, is convenient to operate and can perform fine adjustment on the pressure of a plurality of low pressure ends simultaneously.
Disclosure of Invention
In order to overcome the problems, the invention provides a high-pressure gas pressure fine adjustment device, which drives piston assemblies to do linear reciprocating motion in a cylinder barrel through a driving assembly, so that a storage cavity formed between the piston assemblies is sequentially communicated with a gas inlet and a gas outlet, less gas input from a high-pressure end is transferred to a low-pressure end and then output, and the fine adjustment of the high-pressure gas is realized.
In order to realize the purpose, the invention adopts the technical scheme that:
a high-pressure gas pressure fine adjustment device comprises a cylinder barrel with a piston cavity, an air inlet and an air outlet which are arranged on the peripheral wall of the cylinder barrel and communicated with the piston cavity, a piston assembly arranged in the piston cavity, and a driving assembly for driving the piston assembly to reciprocate in the piston cavity;
the piston assembly comprises two sets of piston assemblies and a piston connecting piece arranged between the two sets of piston assemblies, the peripheral walls of the two sets of piston assemblies are respectively provided with a sealing assembly so as to be in sealing arrangement with the cylinder barrel, and a storage cavity which is only simultaneously communicated with the air inlet or the air outlet is formed between the two sets of piston assemblies.
Furthermore, the piston cavity is of a first cylindrical structure, the two sets of piston pieces are of a second cylindrical structure, the central axis of the piston pieces coincides with the central axis of the piston cavity, and the distance between the two sets of piston pieces is smaller than the distance between the air inlet and the air outlet in the direction of the central axis of the cylinder barrel.
Further, the seal assembly comprises a seal groove and a seal ring, wherein the seal groove is arranged on the outer peripheral wall of the piston piece along the circumferential direction, the seal ring is contained in the seal groove, and the outer peripheral wall of the seal ring is close to the inner peripheral wall of the cylinder barrel.
Furthermore, the piston connecting piece is of a rod-shaped structure, the outer diameter of the piston connecting piece is smaller than that of the piston connecting piece, and the air inlet and the air outlet are respectively provided with one group and are positioned on the same side or the opposite side of the piston connecting piece.
Furthermore, the piston connecting piece is of a plate-shaped structure, and two ends of the piston connecting piece and the cylinder barrel are arranged in a sealing mode so as to divide the storage cavity into an upper cavity and a lower cavity.
Furthermore, the air outlets and the air inlets are arranged into two groups and symmetrically arranged above and below the piston connecting piece.
Furthermore, the two groups of air outlets are respectively and correspondingly communicated with the upper cavity and the lower cavity, and a vent valve is arranged on the piston connecting piece to control whether the upper cavity is communicated with the lower cavity or not.
Furthermore, one end of the cylinder barrel is provided with an opening, the other end cover of the cylinder barrel is provided with a cover plate, and the cover plate is provided with a vent hole.
Further, the drive assembly comprises a stepping motor arranged on the outer side of the cylinder barrel, a rotary disc coaxially connected with the drive end of the stepping motor, a connecting rod with one end connected with the rotary disc in a rotating mode, and a rotating bearing arranged at one end, close to the stepping motor, of the piston assembly, and the other end of the connecting rod is connected with the rotating bearing in a rotating mode.
Further, the air inlet is communicated with the high-pressure end, and the air outlet is communicated with the low-pressure end.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the high-pressure gas pressure fine adjustment device, the driving assembly is arranged to drive the piston assemblies to do linear reciprocating motion in the cylinder barrel, so that the storage cavity formed between the piston assemblies is sequentially communicated with the gas inlet and the gas outlet, less gas input from the high-pressure end is transferred to the low-pressure end and then output, fine adjustment of the high-pressure gas is achieved, and the whole device is simple in structure, low in cost and convenient to operate.
2. According to the high-pressure gas pressure fine adjustment device, the sealing ring is arranged, so that high-pressure airflow at a high-pressure end cannot flow to a low-pressure end from a gap between the piston assembly and the inner wall of the cylinder barrel in the process of linear reciprocating motion of the piston assembly in the cylinder barrel, and the precision of fine adjustment of air pressure is guaranteed.
3. The high-pressure gas pressure fine-adjustment device provided by the invention has the advantages that the piston connecting piece is arranged into a plate-shaped structure, so that the storage cavity is divided into the upper cavity and the lower cavity, the upper cavity and the lower cavity are respectively communicated with different gas outlets, and whether the upper cavity is communicated with the lower cavity is controlled by the vent valve arranged on the piston connecting piece, so that the pressure fine adjustment of different low-pressure ends is selectively realized.
4. According to the high-pressure gas pressure fine adjustment device, the piston connecting piece is arranged to be of the plate-shaped structure, the storage cavity is divided into the upper cavity and the lower cavity, the upper cavity and the lower cavity are respectively communicated with the different gas inlets and the different gas outlets, so that one set of device can simultaneously perform pressure fine adjustment on two sets of equipment, the pressure fine adjustment is realized by a single motor, and the two sets of adjustment processes cannot be interfered with each other.
Drawings
FIG. 1 is a schematic view of the high pressure gas pressure fine adjustment apparatus of the present invention;
FIG. 2 is a schematic structural diagram of a piston assembly and a driving assembly of the fine adjustment device for high-pressure gas pressure according to the present invention;
the parts in the drawings are numbered as follows: 10. a cylinder barrel; 11. a cover plate; 12. a vent hole; 20. a piston member; 21. a piston connector; 22. a seal ring; 30. a stepping motor; 31. a turntable; 32. a connecting rod; 33. an ear plate; 40. an air inlet; 41. a high-voltage end; 50. an air outlet; 51. a low-voltage end.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that 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.
Examples
As shown in fig. 1, a high-pressure gas pressure fine adjustment device 100 includes a cylinder 10 having a piston chamber, an air inlet 40 and an air outlet 50 disposed on an outer peripheral wall of the cylinder 10 and communicated with the piston chamber, a piston assembly disposed in the piston chamber, and a driving assembly for driving the piston assembly to reciprocate in the piston chamber. The gas inlet 40 communicates with the high pressure end 41 to receive high pressure gas output from the high pressure end 41. The gas outlet 50 communicates with the low pressure end 51 to output the received high pressure gas to the low pressure end 51.
The piston assembly comprises two sets of piston members 20 and a piston connecting member 21 disposed between the two sets of piston members 20. The two sets of piston members 20 are identical in shape and structure, and a piston connecting member 21 is provided for connecting the two sets of piston members 20 to achieve synchronous movement. The periphery wall of two sets of piston spare 20 all is provided with seal assembly in order to be sealed setting with cylinder 10, guarantees that piston assembly is the straight reciprocating motion in-process in cylinder 10, and the high-pressure draught of high-pressure end 41 can not circulate to low pressure end 51 from the clearance between piston assembly and the cylinder 10 inner wall, guarantees the precision of atmospheric pressure fine setting. In addition, a storage chamber which is only communicated with the gas inlet 40 or the gas outlet 50 at the same time is formed between the two sets of piston elements 20, so that the function of transporting high-pressure gas by the storage chamber is realized.
So set up, drive piston assembly through setting up drive assembly and be straight reciprocating motion in cylinder 10 for the storage chamber that forms between the piston assembly communicates with air inlet 40 and gas outlet 50 in proper order, thereby exports after transporting the less gas of high-pressure end 41 input to low pressure end 51, and then realizes high-pressure gas's fine setting, whole device simple structure, with low costs and convenient operation.
In some embodiments, one end of the cylinder 10 is provided with an opening to facilitate connection of the piston assembly within the cylinder 10 to a drive assembly. The other end cover of cylinder 10 is equipped with apron 11, is provided with air vent 12 on the apron 11 to communicate the space of keeping away from piston assembly of cylinder 10 with the external world, maintain the atmospheric pressure unanimity between the two, guarantee piston assembly's smooth motion.
As shown in fig. 1 to 2, in some embodiments, the driving assembly includes a stepping motor 30 disposed outside the cylinder 10, a turntable 31 coaxially connected to a driving end of the stepping motor 30, a connecting rod 32 having one end rotatably connected to the turntable 31, and a rotary bearing disposed at one end of the piston assembly near the stepping motor 30. The step motor 30 adjusts the step pitch and the rotation speed in advance to ensure that the piston assembly does linear reciprocating motion, the piston assembly is not pulled out of the cylinder 10, and the linear reciprocating motion of the piston assembly is realized through the slider-crank mechanism. The other end of the connecting rod 32 is rotatably connected with the rotating bearing, and the connecting position of the connecting rod 32 and the rotating disc 31 is located in the region of the rotating disc 31 except the central position, so as to ensure that the axis of the connecting rod 32 and the rotating disc 31 when rotating around the rotating disc 31 does not coincide with the central axis of the rotating disc 31. Specifically, the middle position of one end of the piston assembly close to the stepping motor 30 is symmetrically provided with an ear plate 33, the ear plate 33 is provided with a mounting hole, a rotating bearing is arranged in the mounting hole, and two sides of one end of the connecting rod 32 close to the rotating bearing are provided with rotating columns accommodated in the rotating bearing. So set up, step motor 30 drive carousel 31 rotates, and carousel 31 and then drive connecting rod 32 and rotate around the axis of connecting rod 32 and carousel 31 junction department, and connecting rod 32 is at the pivoted in-process and then the pulling piston assembly is straight reciprocating motion in cylinder 10.
It is noted that the drive assembly may also be provided as a lead screw mechanism driven by a reciprocating cylinder drive mechanism or an electric motor.
As shown in fig. 1-2, in some embodiments, the piston chambers are arranged in a first cylindrical configuration and both piston members 20 are arranged in a second cylindrical configuration to match the shape of the piston chambers. The central axis of the piston member 20 coincides with the central axis of the piston chamber, ensuring smooth sliding of the piston member 20. In particular, the distance between the two sets of piston members 20 is smaller than the distance between the air inlet 40 and the air outlet 50 along the central axis of the cylinder 10, so as to ensure that the air outlet 50 is not communicated with the storage chamber when the storage chamber is communicated with the air inlet 40, and to ensure that the air inlet 40 is not communicated with the storage chamber when the storage chamber is communicated with the air outlet 50.
As shown in fig. 1-2, in some embodiments, the seal assembly includes a seal groove circumferentially disposed on the outer circumferential wall of the piston member 20, and a seal ring 22 received in the seal groove, the outer circumferential wall of the seal ring 22 abutting the inner circumferential wall of the cylinder 10 to seal between the piston member 20 and the cylinder 10 when the piston member 20 moves.
As shown in fig. 1 to 2, in some embodiments, the piston connecting member 21 is provided in a rod-like structure having an outer diameter smaller than that of the piston members 20 to ensure that the storage chamber formed between the piston members 20 is a single chamber. The air inlet 40 and the air outlet 50 are arranged in a group and are positioned on the same side or opposite side of the piston connecting piece 21. In particular, the air inlet 40 is located on a side of the air outlet 50 remote from the drive assembly. So configured, when the piston assembly moves to the storage chamber and communicates with the gas inlet 40, the high pressure end 41 inputs high pressure gas into the storage chamber, and with the continued movement of the piston assembly, the storage chamber is disconnected from the gas inlet 40 and communicates with the gas outlet 50, and the high pressure gas in the storage chamber enters the low pressure end 51.
In other embodiments, the piston connecting member 21 is disposed in a plate-like structure, and two ends of the piston connecting member are sealed with the cylinder 10 to divide the storage chamber into an upper chamber and a lower chamber, and the upper chamber and the lower chamber are not communicated with each other.
The air outlets 50 and the air inlets 40 are arranged in two groups and are symmetrically arranged above and below the piston connecting piece 21. The air inlet 40 and the air outlet 50 which are positioned in the same group are positioned on the same side of the piston connecting piece 21, so that one set of device can simultaneously carry out pressure fine adjustment on two groups of equipment, the pressure fine adjustment is realized by a single motor, and the two groups of adjusting processes cannot be mutually interfered.
It should be noted that, when the piston connecting member 21 is provided in a plate-like structure, a vent valve (not shown) may be provided on the piston connecting member 21 to control whether the upper chamber and the lower chamber are communicated with each other or not by the vent valve. In this case, the air outlets 50 are arranged in two groups and respectively and correspondingly communicated with the upper cavity and the lower cavity, so that the pressure fine adjustment of different low-pressure ends 51 is selectively realized, and the technical effect of performing the pressure fine adjustment of multiple groups of low-pressure ends 51 by the same high-pressure end 41 is realized.
The following describes a specific operation of the present embodiment:
initially, the stepping motor 30 drives the turntable 31 to rotate, and the turntable 31 in turn drives the connecting rod 32 to rotate around the axis at the connecting position of the connecting rod 32 and the turntable 31. When the connecting rod 32 rotates in the upper semicircular area of the turntable 31, the connecting rod 32 pulls the piston assembly to move outwards in the rotating process, the piston assembly moves firstly until the storage cavity is communicated with the gas inlet 40, the high-pressure end 41 inputs high-pressure gas into the storage cavity, the storage cavity is disconnected with the gas inlet 40 and communicated with the gas outlet 50 along with the continuous outward movement of the piston assembly, and the high-pressure gas in the storage cavity enters the low-pressure end 51, so that the pressure fine adjustment is realized. Since the stepping motor 30 is preset with a step and a rotation speed, when the fine adjustment of the pressure is completed, the connecting rod 32 rotates to be located in the lower semicircular area of the disc, and the connecting rod 32 pulls the piston assembly to move inwards and resets the piston assembly in the rotating process. Subsequently, the connecting rod 32 is rotated to be located in the semicircular region of the disk, and the above operation is repeated until the predicted pressure fine adjustment amount is completed.
The above description is only for the purpose of illustrating the technical solutions of the present invention and is not intended to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; all the equivalent structures or equivalent processes performed by using the contents of the specification and the drawings of the invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The high-pressure gas pressure fine adjustment device is characterized by comprising a cylinder barrel (10) with a piston cavity, an air inlet (40) and an air outlet (50) which are arranged on the peripheral wall of the cylinder barrel (10) and communicated with the piston cavity, a piston assembly arranged in the piston cavity, and a driving assembly for driving the piston assembly to reciprocate in the piston cavity;
the piston assembly comprises two groups of piston assemblies (20) and a piston connecting piece (21) arranged between the two groups of piston assemblies (20), the peripheral walls of the two groups of piston assemblies (20) are respectively provided with a sealing assembly so as to be in sealing arrangement with the cylinder barrel (10), and a storage cavity which is communicated with the air inlet (40) or the air outlet (50) at the same time is formed between the two groups of piston assemblies (20).
2. The high-pressure gas pressure fine adjustment device according to claim 1, wherein the piston chamber is arranged in a first cylindrical structure, the two sets of piston members (20) are arranged in a second cylindrical structure, the central axis of the piston members coincides with the central axis of the piston chamber, and the distance between the two sets of piston members (20) is smaller than the distance between the gas inlet (40) and the gas outlet (50) along the central axis of the cylinder (10).
3. A high-pressure gas pressure fine adjustment device according to claim 2, characterized in that the sealing assembly comprises a sealing groove provided circumferentially to the outer circumferential wall of the piston member (20), and a sealing ring (22) accommodated in the sealing groove, the outer circumferential wall of the sealing ring (22) being in close proximity to the inner circumferential wall of the cylinder tube (10).
4. The high-pressure gas pressure fine adjustment device according to claim 2, wherein the piston connecting member (21) is provided in a rod-like structure having an outer diameter smaller than that of the piston member (20), and the gas inlet port (40) and the gas outlet port (50) are provided in a set and located on the same side or opposite side of the piston connecting member (21).
5. The high-pressure gas pressure fine adjustment device according to claim 2, wherein the piston connection member (21) is provided in a plate-like structure, and both ends thereof are sealingly provided with the cylinder (10) so as to divide the storage chamber into an upper chamber and a lower chamber.
6. The high-pressure gas pressure fine adjustment device according to claim 5, wherein the gas outlet (50) and the gas inlet (40) are provided in two sets and are symmetrically provided above and below the piston connection member (21).
7. The fine adjustment apparatus for high-pressure gas pressure according to claim 5, wherein the gas outlets (50) are provided in two sets and are respectively communicated with the upper chamber and the lower chamber, and a vent valve is provided on the piston connecting member (21) to control whether the upper chamber and the lower chamber are communicated or not.
8. The fine adjustment device for the pressure of high-pressure gas according to claim 1, wherein one end of the cylinder (10) is provided with an opening, the other end of the cylinder is provided with a cover plate (11), and the cover plate (11) is provided with a vent hole (12).
9. The high-pressure gas pressure fine adjustment device according to claim 1, wherein the driving assembly includes a stepping motor (30) disposed outside the cylinder (10), a turntable (31) coaxially connected to a driving end of the stepping motor (30), a connecting rod (32) having one end rotatably connected to the turntable (31), and a rotary bearing disposed at one end of the piston assembly near the stepping motor (30), and the other end of the connecting rod (32) is rotatably connected to the rotary bearing.
10. A high-pressure gas pressure fine adjustment device according to claim 1, characterized in that the gas inlet (40) communicates with a high-pressure end (41) and the gas outlet (50) communicates with a low-pressure end (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210142560.5A CN114458659A (en) | 2022-02-16 | 2022-02-16 | High-pressure gas pressure micro-adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210142560.5A CN114458659A (en) | 2022-02-16 | 2022-02-16 | High-pressure gas pressure micro-adjusting device |
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| CN114458659A true CN114458659A (en) | 2022-05-10 |
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| CN202210142560.5A Pending CN114458659A (en) | 2022-02-16 | 2022-02-16 | High-pressure gas pressure micro-adjusting device |
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