WO2020000119A1

WO2020000119A1 - Linkage-based dual pressurization pneumatic source

Info

Publication number: WO2020000119A1
Application number: PCT/CN2018/000235
Authority: WO
Inventors: 韩利民; 孙凤仙; 赵金桥
Original assignee: 北京斯贝克科技有限责任公司
Priority date: 2018-06-25
Filing date: 2018-06-25
Publication date: 2020-01-02

Abstract

A linkage-based dual pressurization pneumatic source, comprising a three-bar linkage control mechanism (1), a pre-compression cylinder (2), a pressure increasing cylinder (3), and a pressure fine-adjustment mechanism (6). The pre-compression cylinder (2) performs pre-compression by means of air inlet check valves at two ends thereof. The pressure increasing cylinder (3) outputs pressurized air by means of a check valve at a front end thereof. The pressure fine-adjustment mechanism (6) employs movement of a fine-adjustment piston (6-2) in a fine-adjustment cylinder (6-4) to perform fine-adjustment of compressed air therein, thereby performing fine-adjustment of a pressure of a pneumatic source, solving the problem in the prior art in which adjustment of a pneumatic source is less precise and unable to meet various parameter requirements. The invention can be operated easily, creates a high pressure from application of a low pressure, and realizes fine pressure adjustment in a process of checking a pressure meter.

Description

Connecting rod type double boost pressure source

Technical field

The utility model relates to a connecting rod type dual pressure air pressure source, which is mainly applicable to equipment for manually providing pressure on the spot and used for verifying pressure gauges, pressure transmitters, pressure sensors and other pressure instruments.

Background technique

Gas pressure gauges used in industrial production, pressure measurement and other fields must be checked after use for a period of time to determine whether the gas pressure gauge is accurate. The traditional gas pressure calibrator used to verify the pressure gauge is time consuming and laborious to build a pressure. The gas pressure pump currently used in the pressure gauge calibrator or pressure gauge calibration system is a single-piston hand pressure gas pump, which is subject to piston stroke and The pressure applied by the person is limited, and the maximum output pressure will not be greater than 4MPa. Currently, there are two-cylinder pre-charging pressure sources on the market, but the gas circuit design is not perfect. Even if there is a fine-tuning design and a pressure cut-off design, the design is not precise enough to meet the requirements of various parameters.

With the development of science and technology, the pressure resistance of industrial and military pressure equipment is getting stronger and stronger, and the pressure monitoring instruments supporting it are also constantly improved. The requirements for on-site calibration instruments are getting higher and higher. Not only an integrated device is needed, but also simple operation. A small pressure can create a large pressure source. In the process of pressure gauge calibration, To achieve various fine pressure adjustment functions of the pressure gauge.

Utility model content

A connecting rod type double boost pressure source includes three-link control mechanism 1, pre-pressure cylinder 2, pre-pressure piston 2-1, pressure cylinder 3, pressure piston 3-1, pressure rod 4, and connecting rod. 1-1, connecting rod 1-2, connecting rod 1-3, the pre-pressing piston 2-1 in the pre-pressing cylinder 2 and the pressurizing piston 3-1 in the pressurizing cylinder 3 are coaxially connected through a pin, and the pre-pressing The stroke of the piston 2-1 in the pre-pressure cylinder 2 is the same as the stroke of the booster piston 3-1 in the pressure cylinder 3. The diameter of the pre-pressure cylinder 2 is larger than the diameter of the pressure cylinder 3. The pre-pressure cylinder 2 passes The inlet check valves at both ends are preloaded, the booster cylinder 3 outputs the air pressure through the front check valve, and the booster piston 3-1 releases the air pressure through the front check valve. It also includes a pressure fine adjustment mechanism 6, and the fine adjustment mechanism is adjusted by fine adjustment. Circle 6-1, fine-tuning piston 6-2, fine-tuning handwheel 6-3, fine-tuning cylinder 6-4, fine-tuning lead screw 6-5 and screw nut 6-6. The fine-tuning mechanism 6 is fine-tuned by fine-tuning piston 6-2. The movement in the cylinder 6-4 fine-tunes the internal compressed gas to fine-tune the pressure of the pneumatic source.

It also includes a frame 11, which includes: a lever chamber 11-1, a three-link chamber 11-2, a booster cylinder 11-3, a pre-press cylinder 11-4, a front end of the rack 11-5, a stop Plate 11-6, feet 11-7 and chute 11-8, the three-link control mechanism 1 is provided in the three-link cavity 11-2, and the fixed rod 4-1 is provided in the pressure rod cavity 11-1, The pre-pressing cylinder 2 is arranged in the pre-pressing cylinder block 11-4, the supercharging cylinder 3 is set in the supercharging cylinder block 11-3, the pressure trimming mechanism 6 is set at the front end 11-5 of the rack, and the feet 11-7 support the air pressure source The pin connected to the connecting rod 1-3 and the preload piston 2-1 slides in the chute 11-8, and the frame 11 is used to accommodate the entire air pressure source.

One end of the fine-tuning screw 6-5 is connected to the fine-tuning handwheel 6-3, and the fine-tuning screw 6-6 is connected and fixed to the fine-tuning cylinder 6-4 through the screw nut 6-6. The fine adjustment piston 6-2 is connected.

Fine adjustment cylinder 6-4 includes: 6-4-1 external thread on both ends, fixed column 6-4-2, gasket area 6-4-3, and fine adjustment piston movement area 6-4-4, external threads on both ends One end of the wire 6-4-1 is connected to the screw nut 6-6, and one end is connected to the front end of the rack 11-5 and fixed on the rack.

The outer wall of the fine adjustment piston 6-2 is provided with a 0-ring and a fine adjustment ring. The fine adjustment piston movement area 6-4-4 is sealed in the fine adjustment cylinder 6-4.

It also includes a pressure cut-off mechanism 7. The cut-off mechanism is composed of a cut-off handwheel 7-1, a cut-off valve needle 7-2, a gear nut 7-4, a cut-off ring and a copper pad 7-3. The hand wheel 7-1 is fixed in the front end 11-5 of the rack through the gear nut 7-4, and the internal path of the compressed gas blocked by the needle part of the stop valve needle 7-2 is sealed by the stop ring and the copper pad 7-3. The air pressure transmission and pressure cut-off mechanism 7 is arranged on the front end of the frame 11 opposite to the pressure fine adjustment mechanism 6.

It also includes at least one pressure output mechanism 8. The pressure output mechanism 8 includes: a pressure output frame 8-1, a pressure output adjustment valve 8-2, a pressure output adjustment handwheel 8-3, a pressure output port 8-4, and a pressure output adjustment valve 8. -2 is set on the pressure output frame 8-1, and the pressure output port 8-4 is set in the pressure output regulating valve 8-2 for connecting the pressure gauge.

Also includes a deflation device 9, the deflation device includes: a bleed valve sleeve 9-1, a bleed valve needle 9-2, a bleed valve handle 9-3, a bleed valve seat 9-4, a bleed valve handle 9- 3 is connected to the air bleed valve sleeve 9-1, the air bleed needle 9-2 and the air bleed valve seat 9-4, and the air bleed device 9 is provided at the pressure output regulating valve 8-2.

It also includes a positive-negative pressure switching mechanism 5. The positive-negative pressure switching mechanism 5 is composed of a directional valve 5-1, a switching handwheel 5-2, and a compression spring 5-3. The positive-negative pressure switching mechanism 5 is arranged in front of the booster cylinder 3. After the pressure fine-tuning mechanism 6, the switching handwheel 5-2 is set on one side of the pressure fine-tuning mechanism 6. The switching mechanism controls the switching of positive and negative pressure by controlling the reversing valve 5-1, and adjusts the positive pressure input to the pressure output mechanism 8. The negative pressure is adjusted to output the pressure in the pressure output mechanism (8), and the positive and negative pressure switching mechanism 5 is provided on the front side of the frame 11 on the same side as the pressure fine adjustment mechanism 6.

The switching handwheel 5-2 is fixed to one end of the switching valve 5-1 through a compression spring 5-3.

The directional valve 5-1 is provided with two vent holes 5-1-1 and a sliding pin port 5-1-2.

A resetting device 10 is also included. The resetting device 10 includes a compression spring 10-1 and a sliding pin 10-2. The resetting device 10 is provided at the pressure switching mechanism 5 for resetting the switching mechanism. The resetting device 10 is provided for fine adjustment with the pressure. Institution 6 is on the same side.

It includes a positive pressure gas path and a negative pressure gas path, and both of the positive pressure gas path and the negative pressure gas path are controlled by the pressure cut-off mechanism 7 and the fine adjustment mechanism 6.

The pressure range that the utility model can provide is in the pressure range of (-0.095-0 to 10) MPa, which is light in weight, convenient to carry, and simple and reliable to operate. And can realize the accurate calibration of the pressure gauge in the process of fine pressure adjustment, and realize the convenient switching of positive pressure and negative pressure; in the process of pressure calibration, the pressure can be smoothly cut off, and the pressure gauge and the output pressure can be verified in real time. size. After the pressure gauge is calibrated, the pressure gas can be smoothly released.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 Front view of a connecting rod type dual boost pressure source

Figure 2

Figure 3 perspective view of the connecting rod type dual boost pressure source

Figure 4 Structure of fine-tuning mechanism

Fig. 5 Fine-tuning cylinder structure

Figure 6 Fine-tuning piston structure

Figure 7 Structure of the pressure cut-off mechanism

Figure 8 Structure diagram of pressure output mechanism

Figure 9 Structure of positive and negative pressure switching mechanism

Figure 10 Structure of the directional valve

Figure 11 Structure of the reset device

Among them 1, three-link control mechanism, 2, pre-pressure cylinder, 3, booster cylinder, 4, pressure rod, 5, positive and negative pressure switching mechanism, 6, pressure trimming mechanism, 7, pressure cut-off mechanism, 8, pressure output Mechanism, 9, deflation device, 10, reset device, 11, rack

1-1 connecting rod, 1-2, connecting rod, 1-3, connecting rod

2-1. Preload piston

3-1, booster piston

4-1, Fixed rod, 4-2, Tail rod end, 4-3, Pole holder

5-1, Reversing valve, 5-2, Switching handwheel, 5-3, Compression spring

5-1-1, ventilation hole, 5-1-2, sliding pin

6-1, fine-tuning ring, 6-2, fine-tuning piston, 6-3, fine-tuning handwheel, 6-4, fine-tuning cylinder, 6-5, fine-tuning lead screw, 6-6, screw nut

6-4-1, external thread pair at both ends, 6-4-2, fixed column, 6-4-3, gasket area, 6-4-4, fine adjustment piston movement area

7-1, stop handwheel, 7-2, stop valve needle, 7-3, stop ring

8-1, pressure output rack, 8-2, pressure output adjustment valve, 8-3, pressure output adjustment handwheel, 8-4, pressure output port

9-1, bleed valve sleeve, 9-2, bleed valve needle, 9-3, bleed valve handle, 9-4, bleed valve seat

10-1, compression spring, 10-2, sliding pin

11-1, Rod cavity, 11-2, Three-link cavity, 11-3, Booster cylinder, 11-4, Pre-press cylinder, 11-5, Front of rack, 11-6, Baffle, 11-7, feet, 11-8, chute

detailed description

Preparations: Turn the rotary pressure fine-tuning mechanism 6 counterclockwise, and turn the rotary pressure fine-tuning mechanism 6 counterclockwise to the outer end. Each output port is equipped with a seal and connected to the test and standard instruments. During the calibration during the boosting process, the air release device 9 is first closed, and the pressure lever 4 is moved up and down. When the pressure is close to the first verification point, the pressure cut-off mechanism 7 is closed clockwise, and the pressure fine adjustment mechanism 6 is rotated to this point. Record data. Open the pressure blocking mechanism 7 counterclockwise and continue to move the pressure lever 4 up and down. When the pressure approaches the second verification point, close the pressure blocking mechanism 7 clockwise, and rotate the pressure fine adjustment mechanism 6 to this point, and record the data after comparison. And so on, and then calibrate the other pressure points of the pressure instrument rising process to full scale. When it is difficult to move the pressure lever 4 up and down during the pressure increase, the pressure fine adjustment mechanism 6 can be used to rotate clockwise to continue the pressure increase until the points of the full scale are calibrated.

When calibrating the depressurization process, first, when the pressure cut-off mechanism 7 is closed, slowly open the deflation device 9 counterclockwise. When the pressure is close to the first point of the return check, quickly close the pressure cut-off mechanism 7 clockwise, and rotate the pressure fine-tuning mechanism. 6 to this point, record the data after comparison. And so on, and then check the other pressure points of the pressure gauge pressure reduction process. In the micro-pressure state, the pressure fine-tuning mechanism 6 can be rotated counterclockwise to perform calibration at each point of the pressure reduction process. Until the rotation pressure fine adjustment mechanism 6 is turned counterclockwise, the zero point calibration is performed.

When calibrating the negative pressure, firstly close the pressure cut-off mechanism 7 and move the pressure lever 4 up and down. When the pressure is close to the first verification point, close the pressure cut-off mechanism 7 clockwise and rotate the pressure fine-tuning mechanism 6 to this point. After recording the data. Open the pressure cut-off mechanism 7 counterclockwise and continue to move the pressure lever 4 up and down. When the pressure approaches the second verification point, close the pressure cut-off mechanism 7 clockwise and rotate the pressure fine-tuning mechanism 6 to this point, and record the data after comparison. And so on, and then calibrate the other pressure points of the pressure instrument ascent process to -95kPa.

For the calibration of the negative pressure reduction process, firstly, when the pressure cut-off mechanism 7 is in the closed state, slowly open the deflation device 9 counterclockwise. When the pressure is close to the first point of the return check, close the deflation device 9 clockwise quickly, and rotate the pressure to adjust At this point, the institution 6 records the data after comparison. And so on, and then check the other pressure points of the pressure gauge pressure reduction process.

Claims

A connecting rod type double boost pressure source includes: a three link control mechanism (1), a preload cylinder (2), a preload piston (2-1), a boost cylinder (3), and a boost piston (3) -1), lever (4), fixing lever (4-1), tail of lever (4-2), connecting rod (1-1), connecting rod (1-2), connecting rod (1-3) , The pre-pressing piston (2-1) in the pre-pressing cylinder (2) and the pressurizing piston (3-1) in the pressurizing cylinder (3) are coaxially connected through a pin, and the pre-pressing piston (2-1) ) The stroke in the pre-pressure cylinder (2) is the same as the stroke of the booster piston (3-1) in the booster cylinder (3). The diameter of the pre-pressure cylinder (2) is larger than that of the booster cylinder (3). ) Diameter, the pre-compression cylinder (2) is pre-pressed by the inlet check valve at both ends, the booster cylinder (3) outputs the air pressure through the check valve at the front end, and the booster piston (3-1) passes the check valve at the front end The release of air pressure is characterized in that it further comprises a pressure fine adjustment mechanism (6), the fine adjustment mechanism is composed of a fine adjustment ring (6-1), a fine adjustment piston (6-2), a fine adjustment hand wheel (6-3), and a fine adjustment cylinder ( 6-4), a fine adjustment screw (6-5) and a screw nut (6-6), the fine adjustment mechanism (6) finely adjusts the interior of the fine adjustment cylinder (6-4) through the fine adjustment of the piston (6-2). Compressed gas to fine-tune the pressure of the pneumatic source.
The double-barreled pressure source of pneumatic pressure according to claim 1, further comprising a frame (11), the frame (11) comprising: a pressure rod cavity (11-1), a triple Rod cavity (11-2), supercharging cylinder (11-3), pre-pressing cylinder (11-4), front end of frame (11-5), bezel (11-6), feet (11-7) ) And chute (11-8), the three-link control mechanism (1) is provided in the three-link cavity (11-2), and the fixed rod (4-1) is provided in the pressure rod cavity ( In 11-1), the pre-pressure cylinder (2) is provided in a pre-pressure cylinder (11-4), and the pressure-increasing cylinder (3) is provided in the pressure-increasing cylinder (11-3). The pressure fine adjustment mechanism (6) is arranged at the front end (11-5) of the frame, the feet (11-7) support the air pressure source, the connecting rod (1-3) and the preload piston (2) -1) The connected pin slides in the chute (11-8), and the frame (11) is used to receive the entire air pressure source.
The double-barrel pressure boosting pressure source according to claim 1, characterized in that one end of the fine adjustment screw (6-5) is connected to the fine adjustment handwheel (6-3), and the fine adjustment screw (6-3) is connected through the screw. A female (6-6) connection is fixed on the fine adjustment cylinder (6-4), and the other end is connected with the fine adjustment piston (6-2) through a fine adjustment screw and a fine adjustment nut.
The double-barrel pressure boosting pressure source according to claim 1 or 3, wherein the fine adjustment cylinder (6-4) comprises: externally threaded wires (6-4-1) at both ends, fixed A column (6-4-2), a gasket area (6-4-3) and a fine-tuning piston movement area (6-4-4), the two ends of the external thread are connected to the wire (6-4-1), and one end is connected to the wire A bar nut (6-6), one end of which is connected to the front end of the rack (11-5) and fixed on the rack.
The double-barreled pressure source of pneumatic pressure according to claim 1, characterized in that: the outer wall of the fine adjustment piston (6-2) is provided with an O ring and a fine adjustment ring in the fine adjustment cylinder (6-4). Fine-tune the piston movement area (6-4-4) for sealing movement.
The double-barrel pressure boosting pressure source according to claim 1 or 2, further comprising a pressure cut-off mechanism (7), wherein the cut-off mechanism comprises a cut-off handwheel (7-1), a cut-off valve needle (7-2), a female gear (7-4), a stop ring and a copper pad (7-3), and one end of the stop valve needle (7-2) is installed with the stop handwheel (7-1), The bracket (7-4) is fixed in the front end (11-5) of the frame, and the stopper ring and the copper pad (7-3) are used to seal the needle of the stop valve needle (7-2). The internal passage of the compressed gas cuts off the transmission of air pressure, and the pressure cut-off mechanism (7) is arranged on the front end of the frame (11) opposite to the pressure trimming mechanism (6).
The double-barrel pressure boosting air pressure source according to claim 1, further comprising at least one pressure output mechanism (8), the pressure output mechanism (8) comprising: a pressure output frame (8-1) ), A pressure output adjusting valve (8-2), a pressure output adjusting handwheel (8-3), a pressure output port (8-4), and the pressure output adjusting valve (8-2) is provided on the pressure output frame ( 8-1), the pressure output port (8-4) is provided in a pressure output regulating valve (8-2) for connecting a pressure gauge.
The double-barreled pressure boosting pressure source according to claim 1, further comprising a deflation device (9), wherein the deflation device comprises: a deflation valve sleeve (9-1), a deflation Valve needle (9-2), bleed valve handle (9-3), bleed valve seat (9-4), the bleed valve handle (9-3) and the bleed valve sleeve (9-1 ), The bleed valve needle (9-2) is connected to the bleed valve seat (9-4), and the bleed device (9) is provided at the pressure output regulating valve (8-2).
The double-barrel pressure boosting pneumatic source according to claim 1 or 2, further comprising a positive-negative pressure switching mechanism (5), wherein the positive-negative pressure switching mechanism (5) is a directional valve ( 5-1), switching handwheel (5-2), compression spring (5-3), the positive and negative pressure switching mechanism (5) is arranged in front of the booster cylinder (3) and after the pressure fine adjustment mechanism (6) The switching handwheel (5-2) is provided on one side of the pressure fine-tuning mechanism (6), and the switching mechanism controls the switching of positive and negative pressure by inserting a control reversing valve (5-1) to adjust the positive pressure input To the pressure output mechanism (8), adjust the negative pressure to output the pressure in the pressure output mechanism (8). The positive and negative pressure switching mechanism (5) is arranged at the front end of the frame (11) and the pressure fine adjustment mechanism ( 6) Same side.
The connecting rod type dual-pressure boosting air pressure source according to claim 9, characterized in that the switching handwheel (5-2) is fixed to the reversing valve (5) by a compression spring (5-3). -1) One end.
The double-barrel pressure boosting pressure source according to claim 9, characterized in that the directional valve (5-1) is provided with two vent holes (5-1-1) and a sliding pin port (5) -1-2).
The double-barrel pressure boosting pressure source according to claim 1 or 2, further comprising a reset device (10), the reset device (10) comprising: a compression spring (10-1) and a slide A pin (10-2), the resetting device (10) is provided at the pressure switching mechanism (5) for resetting the switching mechanism, and the resetting device (10) is provided on the same side as the pressure fine-tuning mechanism (6) .
The double-barrel pressure source according to claim 1, characterized in that it comprises a positive pressure air path and a negative pressure air path, and the positive pressure air path and the negative pressure air path both pass through the pressure cutoff mechanism ( 7) and control of the fine-tuning mechanism (6).