Rapid supercharging device and pressure calibrator

Abstract

The invention provides a rapid supercharging device and a pressure calibrator. The rapid supercharging device comprises a body, a driving mechanism, a crankshaft assembly, a supercharging assembly, a linkage structure and a cylinder body, the crankshaft assembly is rotatably arranged on the body; the driving mechanism is used for driving the crankshaft assembly to rotate; the pressurizing assembly comprises a piston rod and a piston, the piston is movably arranged in the inner cavity of the cylinder body and divides the inner cavity of the cylinder body into two cavities with variable volumes, one end of the piston rod extends into one cavity and is fixedly connected with the piston, and the other end of the piston rod extends out of the cylinder body and is connected to the linkage structure; the linkage structure is in linkage with the crankshaft assembly and the piston rod and used for converting the rotating motion of the crankshaft assembly into linear motion of the piston along the inner cavity of the cylinder body. Miniaturization design of the booster pump is achieved, high pressure can be rapidly output through a small-power motor, and the boosting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of supercharging, in particular to a rapid supercharging device and a pressure calibrating instrument. BACKGROUND

[0002] In the process of using a portable pressure calibrating instrument to calibrate a gas / liquid pressure instrument, compressed air / liquid with a certain pressure is needed as a medium to calibrate the pressure instrument. There are mainly two ways for the source of compressed air / liquid in the traditional way: portable manual pump pressurization or carrying a high-pressure gas cylinder / liquid tank. The manual pump is mainly applied in a manual pressure instrument calibration device. In order to complete the normal calibration process, the operator needs to constantly operate the manual pump to ensure that there is enough compressed air / liquid generated in the calibration process, which is labor-intensive and also affects the efficiency of the calibration work. With the improvement of industrial automation, automatic pressure instrument calibration devices appear, and high-pressure gas cylinders / liquid tanks are used to provide compressed air / liquid for the calibration device, but the capacity of the high-pressure gas cylinder / liquid tank is limited, and the volume is large, which is not easy to carry, bringing many inconveniences to the on-site pressure instrument calibration work, and it is impossible to meet the needs of automatic calibration of pressure instruments in industrial sites. Subsequently, using an electric pump to create pressure has become a trend, but the existing electric pump is designed for industrial large flow, which has the disadvantages of large volume, large weight, and large power consumption, which seriously restricts the development direction of portable or handheld automatic pressure instrument calibration devices towards automation, miniaturization, and high integration. In order to realize the miniaturization of the electric pump, some technicians usually reduce the motor and the body in proportion, however, these electric pumps mostly adopt single-cylinder supercharging mode, and the reduction of the body will cause a serious decrease in supercharging efficiency, affecting the calibration efficiency. If the body is rashly enlarged, it will be contrary to the demand of miniaturization, and it is also difficult to match a small-power motor with a large body to achieve a predetermined high pressure.

[0003] Therefore, it is necessary to design a miniature rapid supercharging device that can increase pressure to meet the needs of automatic, miniaturized, and integrated pressure instrument automatic calibration devices. SUMMARY

[0004] In order to solve at least one of the above technical problems, the present application proposes a rapid supercharging device and a pressure calibrating instrument, which can quickly output high pressure through a small-power motor to meet the needs of automatic, miniaturized, and integrated pressure instrument automatic calibration devices.

[0005] The present application proposes a rapid supercharging device, which comprises a body, a driving mechanism, a crankshaft assembly, a supercharging assembly, a linkage structure, and a cylinder body. The crankshaft assembly is rotatably arranged on the body. The driving mechanism is used to drive the crankshaft assembly to rotate. The supercharging assembly comprises a piston rod and a piston, the piston is movably arranged in the inner cavity of the cylinder body and separates the inner cavity of the cylinder body into two cavities with variable volumes, one end of the piston rod extends into one of the cavities and is fixedly connected with the piston, and the other end of the piston rod extends out of the cylinder body and is connected to the linkage structure; The linkage structure is linked to the crankshaft assembly and the piston rod and is used for converting the rotary motion of the crankshaft assembly into the linear motion of the piston along the inner cavity of the cylinder body.

[0006] Further, in the two cavities with variable volumes, an inlet and an outlet are arranged in each of the cavities, an inlet one-way valve is arranged at the inlet, an outlet one-way valve is arranged at the outlet, and the outlet of the cavity not extending into the piston rod is communicated with the inlet of the cavity extending into the piston rod through a pipeline.

[0007] Further, the sealing structure is further arranged, the sealing structure is fixedly arranged on the cylinder body and slidably sleeved on the piston rod, and is used for sealing the gap between the piston rod and the cylinder body, so that the cavity extending into the piston rod is kept in a sealed state.

[0008] Further, the crankshaft assembly comprises a rotating shaft, a crank and a crank shaft, the rotating shaft is rotatably arranged on the body, the rotating shaft and the crank shaft are fixedly arranged on two sides of the crank respectively, and the axis lines of the rotating shaft and the crank shaft are arranged in a staggered manner, the driving assembly drives the rotating shaft to rotate, so as to drive the crank shaft to rotate relative to the axis line of the rotating shaft.

[0009] Further, the linkage structure is an elliptical track, the elliptical track is fixedly arranged at the end of the piston rod away from the piston, the long axis of the elliptical track is larger than the diameter of the crank shaft, the short axis of the elliptical track is adapted to the diameter of the crank shaft, the crank shaft is sleeved in the elliptical track, the rotating shaft rotates to drive the crank shaft to slide along the elliptical track, and the piston rod is driven to move linearly.

[0010] Further, the auxiliary rotating shaft and the auxiliary crank are further arranged, one end of the auxiliary rotating shaft is rotatably arranged on the body, the other end of the auxiliary rotating shaft is fixedly connected with the auxiliary crank, the auxiliary rotating shaft is coaxially arranged with the rotating shaft, and the crank shaft is fixedly connected between the auxiliary crank and the crank.

[0011] Further, the supercharging assembly, the linkage structure and the cylinder body are at least two respectively, the crank shaft comprises at least two crank shafts arranged in a spaced manner, the at least two supercharging assemblies, the at least two linkage structures, the at least two cylinder bodies and the at least two crank shafts are in one-to-one correspondence, each linkage structure is linked to the corresponding crank shaft and the corresponding supercharging assembly, and converts the rotary motion of each crank shaft around the axis line of the rotating shaft into the linear motion of the corresponding supercharging assembly along the corresponding cylinder body.

[0012] Further, the at least two crank shafts comprise a first crank shaft and a second crank shaft, and the first crank shaft and the second crank shaft are arranged on the crank shaft in a spaced manner. The at least two supercharging assemblies include a first supercharging assembly and a second supercharging assembly; The at least two linkage structures include a first linkage structure and a second linkage structure; The at least two cylinders include a first cylinder and a second cylinder, the first cylinder is internally provided with a first cylinder cavity, and the second cylinder is internally provided with a second cylinder cavity; The first linkage structure is an elliptical track arranged on the first supercharging assembly, the second linkage structure is an elliptical track arranged on the second supercharging assembly, the first linkage structure is sleeved on the first crankshaft part, and the second linkage structure is sleeved on the second crankshaft part.

[0013] Further, the first supercharging assembly includes a first piston and a first piston rod, the first piston is movably arranged in the first cylinder cavity and separates the first cylinder cavity into a first-stage cavity and a second-stage cavity with variable volumes; The second supercharging assembly includes a second piston and a second piston rod, the second piston is movably arranged in the second cylinder cavity and separates the second cylinder cavity into a third-stage cavity and a fourth-stage cavity with variable volumes; The first-stage cavity, the second-stage cavity, the third-stage cavity and the fourth-stage cavity are sequentially communicated according to the sequence of the stages, each stage cavity is respectively provided with an inlet and an outlet, and the outlet of the previous stage cavity is communicated with the inlet of the next stage cavity; The variable volumes of the first-stage cavity, the second-stage cavity, the third-stage cavity and the fourth-stage cavity are sequentially reduced according to the sequence of the stages; or The variable volume of the first-stage cavity is greater than that of the second-stage cavity, the variable volume of the second-stage cavity is equal to that of the third-stage cavity, and the variable volume of the third-stage cavity is greater than that of the fourth-stage cavity.

[0014] The application further provides a pressure calibrating instrument, which comprises the rapid supercharging device.

[0015] The rapid supercharging device and the pressure calibrating instrument can realize the miniaturization design of the supercharging pump, and can quickly output high pressure through a small-power motor, so as to meet the miniaturization and integration requirements of the pressure instrument automatic calibration device.

[0016] Additional aspects and advantages of the application will be described in the following description part, some of which will become apparent from the following description, or will be understood through practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional schematic view of the rapid supercharging device in one view is shown; Figure 2 is a perspective view of the rapid supercharging device of Figure 1 Figure 3 is a front view of the rapid supercharging device of Figure 1 Figure 4 is a sectional view of the rapid supercharging device of Figure 3 Figure 5 is a sectional view of the rapid supercharging device of Figure 3

[0018] Reference signs: rapid supercharging device 100; body 10, first pipeline 11, second pipeline 12; drive mechanism 20, motor 21, driving wheel 211, transmission belt 22, driven wheel 23; crankshaft assembly 30, rotating shaft 31, crank 32, crankshaft 33, first crankshaft part 331, second crankshaft part 332, auxiliary rotating shaft 34, auxiliary crank 35; first supercharging assembly 41, first piston rod 411, first piston 412, second supercharging assembly 42, second piston rod 421, second piston 422; linkage structure 50, first linkage structure 51, second linkage structure 52; cylinder body 60, first cylinder body 61, first stage cavity 611, first inlet 6111, first outlet 6112, first outlet check valve 6114, second stage cavity 612, second inlet 6121, second outlet 6122, second inlet check valve 6123, second cylinder body 62, third stage cavity 621, third inlet 6211, third outlet 6212, third outlet check valve 6214, fourth stage cavity 622, fourth inlet 6221, fourth outlet 6222, fourth inlet check valve 6223; sealing structure 70; cover 80; bearing 90. DETAILED DESCRIPTION

[0019] In order to enable the above-mentioned objects, features and advantages of the present application to be more clearly understood, the following will further describe the present application with reference to the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0020] ​​​​In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be recognized by one skilled in the art that the present application can be practiced without the specific details and, therefore, the scope of the present application is not limited to the details disclosed herein.

[0021] As shown in Figures 1 to 5 The present application provides a rapid supercharging device 100, comprising a body 10, a driving mechanism 20, a crankshaft assembly 30, supercharging assemblies 41, 42, a linkage structure 50 and a cylinder 60. The crankshaft assembly 30 is rotatably arranged on the body 10. The driving mechanism 20 is used to drive the crankshaft assembly 30 to rotate. The supercharging assemblies 41, 42 comprise a piston rod 411, 421 and a piston 412, 422, the piston 412, 422 is movably arranged in the inner cavity of the cylinder 60 and separates the inner cavity of the cylinder 60 into two volume-variable cavities 611, 612 or 621, 622, one end of the piston rod 411, 421 extends into one of the cavities and is fixedly connected with the piston 412, 422, and the other end extends out of the cylinder 60 and is connected to the linkage structure 50. The linkage structure 50 is linked to the crankshaft assembly 30 and the piston rod 41, and is used to convert the rotating motion of the crankshaft assembly 30 into the linear motion of the piston 412, 422 along the inner cavity of the cylinder.

[0022] In each of the two volume-variable cavities, an inlet and an outlet are arranged respectively, an inlet one-way valve is arranged at the inlet, and an outlet one-way valve is arranged at the outlet, and the outlet of the cavity which does not extend into the piston rod 41 is communicated with the inlet of the cavity which extends into the piston rod 411, 421 through a pipeline 11 or 12.

[0023] According to the embodiment of the present application, the inner cavity of the cylinder 60 is a columnar cavity, the piston rod 411, 421 is columnar, and the piston 412, 422 is disc-shaped, the cross-sectional shape and size of the inner cavity of the cylinder are matched with the cross-sectional shape and size of the piston, and the cross-sectional area of the inner cavity of the cylinder is greater than the cross-sectional area of the piston rod; the cross-sectional area of the cavity which does not extend into the piston rod is equal to the cross-sectional area of the inner cavity of the cylinder, and the cross-sectional area of the cavity which extends into the piston rod is equal to the cross-sectional area of the inner cavity of the cylinder minus the cross-sectional area of the piston rod.

[0024] It can be understood that, since the one-way valves are arranged between the cavity which does not extend into the piston rod and the cavity which extends into the piston rod respectively, it can be ensured that the pressure is pressed from the low-level cavity with larger volume (i.e. the cavity which does not extend into the piston rod) into the high-level cavity with smaller volume (i.e. the cavity which extends into the piston rod), and there is no backflow, thereby realizing the effect of step-by-step supercharging.

[0025] The pistons 412, 422 are linearly reciprocated in the inner cavity of the cylinder 60 under the driving of the piston rods 411, 421. When the pistons move away from the linkage mechanism 50, the cavity not penetrating the piston rods 411, 421 gradually becomes smaller, the cavity penetrating the piston rods 411, 421 gradually becomes larger, the medium in the cavity not penetrating the piston rods 411, 421 is compressed into the cavity penetrating the piston rods, and since the sectional area of the cavity penetrating the piston rods 411, 421 is smaller than the sectional area of the cavity not penetrating the piston rods, when the pistons move a unit distance, the volume of the cavity penetrating the piston rods 411, 421 increases is smaller than the volume of the cavity not penetrating the piston rods 411, 421 decreases.

[0026] According to the embodiment of the present application, the rapid supercharging device 100 further comprises a sealing structure 70 fixedly arranged on the cylinder 60 and slidably sleeved on the piston rods 411, 421, for sealing the gap between the piston rods 411, 421 and the cylinder 60, so that the cavity penetrating the piston rods is kept in a sealed state.

[0027] According to the embodiment of the present application, the rapid supercharging device 100 further comprises a cover 80 fixedly arranged on the side of the cylinder 60 away from the sealing structure 70, for plugging the cavity not penetrating the piston rods and keeping it in a sealed state.

[0028] Further, the crankshaft assembly 30 comprises a rotating shaft 31, a crank 32 and a crank shaft 33. The rotating shaft 31 is rotatably arranged on the body 10. The rotating shaft 31 and the crank shaft 33 are fixedly arranged on two sides of the crank 32 respectively. The axis of the rotating shaft 31 is arranged in a staggered manner with respect to the axis of the crank shaft 33. The driving assembly 20 drives the rotating shaft 31 to rotate, so as to drive the crank shaft 33 to rotate relative to the axis of the rotating shaft 31.

[0029] Further, the linkage mechanism 50 is an elliptical track fixedly arranged on the end of the piston rods 411, 421 away from the pistons 412, 422. The major axis of the elliptical track is larger than the diameter of the crank shaft 33, and the minor axis of the elliptical track is adapted to the diameter of the crank shaft 33. The crank shaft 33 is sleeved in the elliptical track. The rotating shaft 31 is rotated to drive the crank shaft 33 to slide along the elliptical track, so as to drive the piston rods 411, 421 to move linearly.

[0030] According to the specific embodiment of the present application, the rapid supercharging device 100 further comprises a bearing 90. The inner ring of the bearing 90 is sleeved on the crank shaft 33, and the outer ring of the bearing 90 is in rollable contact with the inner wall of the elliptical track. It can be understood that, by sleeving the bearing 90 on the crank shaft 33, the relative sliding between the crank shaft 33 and the elliptical track can be converted into rolling between the bearing 90, so as to reduce the movement wear between the crank shaft 33 and the elliptical track, and improve the service life.

[0031] According to the embodiment of the present application, the crankshaft assembly 30 further comprises an auxiliary rotating shaft 34 and an auxiliary crank 35, one end of the auxiliary rotating shaft 34 is rotatably arranged on the body 10, the other end is fixedly connected with the auxiliary crank 35, the auxiliary rotating shaft 34 is coaxially arranged with the rotating shaft 31, the crankshaft 33 is fixedly connected between the auxiliary crank 35 and the crank 32, and the axis of the crankshaft 33 is parallel to the coaxial line of the auxiliary rotating shaft 34 and the rotating shaft 31.

[0032] It can be understood that, by cooperating the auxiliary rotating shaft 34 and the auxiliary crank 35 with the rotating shaft 31 and the crank 32 to move synchronously, the stability of the crankshaft 33 to perform the crankshaft movement can be effectively improved, and thus the stability of the supercharging is improved.

[0033] According to the embodiment of the present application, the supercharging assemblies 41, 42, the linkage structures 50 and the cylinder bodies 60 are at least two respectively, the crankshaft 33 comprises at least two crankshaft portions 331, 332 arranged at intervals, the at least two supercharging assemblies 41, 42, the at least two linkage structures 51, 52, the at least two cylinder bodies 61, 62 and the at least two crankshaft portions 331, 332 correspond to each other one by one, each linkage structure 50 links the corresponding crankshaft portion 331, 332 and the corresponding supercharging assembly 41, 42, and converts the rotating movement of each crankshaft portion 331, 332 around the axis of the rotating shaft 31 into the linear movement of the corresponding supercharging assembly 41, 42 along the corresponding cylinder body 61, 62.

[0034] Further, the at least two crankshaft portions comprise a first crankshaft portion 331 and a second crankshaft portion 332, the first crankshaft portion 331 and the second crankshaft portion 332 are arranged at intervals on the crankshaft 33; The at least two supercharging assemblies comprise a first supercharging assembly 41 and a second supercharging assembly 42; The at least two linkage structures comprise a first linkage structure 51 and a second linkage structure 52; The at least two cylinder bodies comprise a first cylinder body 61 and a second cylinder body 62, the first cylinder body 61 is provided with a first cylinder body inner cavity, and the second cylinder body 62 is provided with a second cylinder body inner cavity; The first linkage structure 51 is an elliptical track arranged on the first supercharging assembly 41, the second linkage structure 52 is an elliptical track arranged on the second supercharging assembly 42, the first linkage structure 51 is sleeved on the first crankshaft portion 331, and the second linkage structure 52 is sleeved on the second crankshaft portion 332.

[0035] It can be understood that the shape and size of the first crankshaft portion 331 and the second crankshaft portion 332 are the same, and the shape and size of the first linkage structure 51 and the second linkage structure 52 are the same. However, it is not limited thereto.

[0036] The first and second supercharging assemblies 41 and 42 are located at the same side of the crankshaft 33, and when the crankshaft 33 rotates, the first and second supercharging assemblies 41 and 42 are driven to run synchronously and in the same direction under the cooperation between the first linkage structure 51 and the first crankshaft part 331 and the cooperation between the second linkage structure 52 and the second crankshaft part 332.

[0037] Further, the first supercharging assembly 41 comprises a first piston 412 and a first piston rod 411, the first piston 412 is movably arranged in the inner cavity of the first cylinder body 61 and divides the inner cavity of the first cylinder body 61 into a first-stage cavity 611 and a second-stage cavity 612 with variable volumes; The second supercharging assembly 42 comprises a second piston 422 and a second piston rod 421, the second piston 422 is movably arranged in the inner cavity of the second cylinder body 62 and divides the inner cavity of the second cylinder body 62 into a third-stage cavity 621 and a fourth-stage cavity 622 with variable volumes; The first-stage cavity 611, the second-stage cavity 612, the third-stage cavity 621 and the fourth-stage cavity 622 are sequentially connected according to the sequence of the stages, each stage cavity is respectively provided with an inlet and an outlet, and the outlet of the former stage cavity is connected to the inlet of the latter stage cavity; The variable volumes of the first-stage cavity 611, the second-stage cavity 612, the third-stage cavity 621 and the fourth-stage cavity 622 are sequentially reduced according to the sequence of the stages; or The variable volume of the first-stage cavity 611 is greater than that of the second-stage cavity 612, the variable volume of the second-stage cavity 612 is equal to that of the third-stage cavity 621, and the variable volume of the third-stage cavity 621 is greater than that of the fourth-stage cavity 622.

[0038] It can be understood that an inlet one-way valve is arranged at the inlet of each stage cavity, and an outlet one-way valve is arranged at the outlet of each stage cavity.

[0039] In a specific embodiment, the first-stage chamber 611 is provided with a first inlet 6111 and a first outlet 6112 on a side away from the second-stage chamber 612. A first inlet check valve (not shown) is provided at the first inlet 6111, and a first outlet check valve 6114 is provided at the first outlet 6112. When the internal volume of the first-stage chamber 611 increases, the internal pressure of the first-stage chamber 611 decreases, allowing ambient air to enter the first-stage chamber 611 through the first inlet check valve, completing the suction process of the first-stage chamber 611. Since the first outlet check valve 6114 flows in the opposite direction to the first inlet check valve, it is closed at this time, meaning that gas in the second-stage chamber 612 cannot flow back into the first-stage chamber 611. When the inner volume of the first-stage cavity 611 decreases, the inner pressure of the first-stage cavity 611 increases, and the gas in the first-stage cavity 611 can push open the first outlet one-way valve 6114 and enter the second-stage cavity 612, completing the pressurization action of the first-stage cavity 611. Since the first inlet one-way valve and the first outlet one-way valve 6114 are in opposite directions, at this time, the first inlet one-way valve is in a closed state, and the gas in the first-stage cavity 611 will not be discharged to the outside through the first inlet 6111.

[0040] The second-stage chamber 612 has a second inlet 6121 and a second outlet 6122 on a side away from the first-stage chamber 611. A second inlet check valve 6123 is provided at the second inlet 6121, and a second outlet check valve (not shown) is provided at the second outlet 6122. A first pipeline 11 is provided on a side wall of the main body 10 corresponding to the first cylinder 61. The first pipeline 11 connects the first outlet 6112 of the first-stage chamber 611 with the second inlet 6121 of the second-stage chamber 612. When the inner volume of the second-stage cavity 612 expands, the inner pressure of the second-stage cavity 612 decreases, and the gas in the first-stage cavity 611 can enter the second-stage cavity 612 through the second inlet one-way valve 6123, completing the suction action of the second-stage cavity 612. Since the second outlet one-way valve is in opposite directions to the second inlet one-way valve 6123, at this time, the second outlet one-way valve is in a closed state, that is, the gas in the third-stage cavity 621 will not flow back to the second-stage cavity 612. When the inner volume of the second-stage cavity 612 decreases, the inner pressure of the second-stage cavity 612 increases, and the gas in the second-stage cavity 612 can push open the second outlet one-way valve and enter the third-stage cavity 621, completing the pressurization action of the second-stage cavity 612. Since the second inlet one-way valve 6123 is in opposite directions to the second outlet one-way valve, at this time, the second inlet one-way valve 6123 is in a closed state, and the gas in the second-stage cavity 612 will not flow back to the first-stage cavity 611 through the second inlet 6121.

[0041] In specific embodiments, the third-stage cavity 621 is provided with a third inlet 6211 and a third outlet 6212 on the side away from the fourth-stage cavity 622; a third inlet check valve (not shown in the figure) is arranged at the third inlet 6111, and a third outlet check valve 6214 is arranged at the third outlet 6212. The third inlet 6211 of the third-stage cavity 621 is in communication with the second outlet 6122 of the second-stage cavity 612 through an externally arranged pipeline (not shown in the figure). When the inner cavity volume of the third-stage cavity 621 increases, the inner cavity pressure of the third-stage cavity 621 decreases, and the gas in the second-stage cavity 612 can enter the third-stage cavity 621 through the third inlet check valve, completing the gas suction action of the third-stage cavity 621. Since the third outlet check valve 6214 is opposite in direction to the third inlet check valve, at this time, the third outlet check valve 6214 is in a closed state, and the gas in the third-stage cavity 621 cannot flow back to the second-stage cavity 612. When the inner cavity volume of the third-stage cavity 621 decreases, the inner cavity pressure of the third-stage cavity 621 increases, and the gas in the third-stage cavity 621 can push away the third outlet check valve 6214 to enter the fourth-stage cavity 622, completing the pressure increasing action of the third-stage cavity 621. Since the third inlet check valve is opposite in direction to the third outlet check valve 6214, at this time, the third inlet check valve is in a closed state, and the gas in the third-stage cavity 621 cannot return to the second-stage cavity 612 through the third inlet 6211.

[0042] The fourth-stage cavity 622 is provided with a fourth inlet 6221 and a fourth outlet 6222 on the side away from the third-stage cavity 621; a fourth inlet check valve 6223 is arranged at the fourth inlet 6221, and a fourth outlet check valve (not shown in the figure) is arranged at the fourth outlet 6222. A second pipeline 12 is arranged on the side wall of the second cylinder body 62 of the body 10, and the second pipeline 12 is in communication with the third outlet 6212 of the third-stage cavity 621 and the fourth inlet 6221 of the fourth-stage cavity 622. When the inner cavity volume of the fourth-stage cavity 622 expands, the inner cavity pressure of the fourth-stage cavity 622 decreases, and the gas in the third-stage cavity 621 can enter the fourth-stage cavity 622 through the fourth inlet check valve 6223, completing the gas suction action of the fourth-stage cavity 622. Since the fourth outlet check valve is opposite in direction to the fourth inlet check valve 6223, at this time, the fourth outlet check valve is in a closed state, and the high-pressure gas of the externally connected output pipeline cannot flow back to the fourth-stage cavity 622. When the inner cavity volume of the fourth-stage cavity 622 decreases, the inner cavity pressure of the fourth-stage cavity 622 increases, and the gas in the fourth-stage cavity 622 can push away the fourth outlet check valve to enter the externally connected output pipeline, completing the pressure increasing action of the fourth-stage cavity 622. Since the fourth inlet check valve 6223 is opposite in direction to the fourth outlet check valve, at this time, the fourth inlet check valve 6223 is in a closed state, and the gas in the fourth-stage cavity 622 cannot flow back to the third-stage cavity 621 through the fourth inlet 6221.

[0043] According to a specific embodiment of the present application, the driving mechanism 20 comprises a motor 21 and a transmission belt 22, the motor 21 is provided with a driving wheel 211, one end of the rotating shaft 31 extends out of the body 10 and is connected with a driven wheel 23, the transmission belt 22 is sleeved between the driving wheel 211 and the driven wheel 23.

[0044] Preferably, the diameter of the driven wheel 23 is greater than that of the driving wheel 211, but not limited to this. It can be understood that, by making the diameter of the driven wheel 23 greater than that of the driving wheel 211, the torque of the rotating shaft 31 can be improved, and a motor 21 with smaller power can be used to realize the power output of the rotating shaft 31 with greater torque, thereby facilitating the improvement of the maximum pressure value after multi-stage pressurization.

[0045] In order to further illustrate the rapid pressurization device of the present application, the working principle thereof will be specifically introduced below.

[0046] The motor 21 drives the driving wheel 211 to rotate, and drives the driven wheel 23 to rotate through the transmission belt 22, thereby driving the rotating shaft 31 to rotate. The rotating shaft 31 rotates, driving the first crankshaft part 331 and the second crankshaft part 332 to rotate synchronously around the axis of the rotating shaft 31. While the first crankshaft part 331 rotates around the axis of the rotating shaft 31, it also slides along the elliptical track in the first linkage structure 51, thereby driving the first piston rod 411 of the first pressurization assembly 41 to move linearly and driving the first piston 412 to slide in the inner cavity of the first cylinder body 61, so as to increase or decrease the volume of the first-stage cavity body 611 and the second-stage cavity body 612 on both sides of the first piston 412. Similarly, while the second crankshaft part 332 rotates around the axis of the rotating shaft 31, it also slides along the elliptical track in the second linkage structure 52, thereby driving the second piston rod 421 of the second pressurization assembly 42 to move linearly and driving the second piston 422 to slide in the inner cavity of the second cylinder body 62, so as to increase or decrease the volume of the third-stage cavity body 621 and the fourth-stage cavity body 622 on both sides of the second piston 422. Specifically, under the limitation of the above structure, taking one rotation of the rotating shaft 31 as a period, when the inner cavity volume of the first-stage cavity body 611 gradually increases, the inner cavity volume of the second-stage cavity body 612 gradually decreases, the inner cavity volume of the third-stage cavity body 621 gradually increases, and the inner cavity volume of the fourth-stage cavity body 622 gradually decreases; similarly, when the inner cavity volume of the first-stage cavity body 611 gradually decreases, the inner cavity volume of the second-stage cavity body 612 gradually increases, the inner cavity volume of the third-stage cavity body 621 gradually decreases, and the inner cavity volume of the fourth-stage cavity body 622 gradually increases.

[0047] Specifically, when the inner cavity volume of the first stage cavity 611 increases, the inner cavity pressure of the first stage cavity 611 decreases, and the external gas can enter the first stage cavity 611 through the first inlet one-way valve, thereby completing the inhalation of the first stage cavity 611. Since the direction of the first outlet one-way valve 6114 is opposite to that of the first inlet one-way valve, at this time, the first outlet one-way valve 6114 is in a closed state, and the gas in the second stage cavity 612 cannot flow back to the first stage cavity 611. At the same time, the inner cavity volume of the second stage cavity 612 decreases, and the inner cavity pressure of the second stage cavity 612 increases, so that the gas in the second stage cavity 612 can push away the second outlet one-way valve and enter the third stage cavity 621, thereby completing the pressurization of the second stage cavity 612. Since the direction of the second inlet one-way valve 6123 is opposite to that of the second outlet one-way valve, at this time, the second inlet one-way valve 6123 is in a closed state, and the gas in the second stage cavity 612 cannot flow back to the first stage cavity 611 through the second inlet 6121. Similarly, at this time, the inner cavity volume of the third stage cavity 621 increases, and the third stage cavity 621 receives the gas pressurized from the second stage cavity 612, and the inner cavity volume of the fourth stage cavity 622 decreases, thereby completing the fourth stage pressurization, and the gas pressurized in the fourth stage cavity 622 is delivered to the output pipeline.

[0048] When the inner cavity volume of the first stage cavity 611 decreases, the inner cavity pressure of the first stage cavity 611 increases, and the gas in the first stage cavity 611 can push away the first outlet one-way valve 6114 and enter the second stage cavity 612, thereby completing the pressurization of the first stage cavity 611. Since the direction of the first inlet one-way valve is opposite to that of the first outlet one-way valve 6114, at this time, the first inlet one-way valve is in a closed state, and the gas in the first stage cavity 611 cannot be discharged to the outside through the first inlet 6111. At the same time, the inner cavity volume of the second stage cavity 612 increases, and the inner cavity pressure of the second stage cavity 612 decreases, so that the gas in the first stage cavity 611 can enter the second stage cavity 612 through the second inlet one-way valve 6123, thereby completing the inhalation of the second stage cavity 612. Since the direction of the second outlet one-way valve is opposite to that of the second inlet one-way valve 6123, at this time, the second outlet one-way valve is in a closed state, and the gas in the third stage cavity 621 cannot flow back to the second stage cavity 612. Similarly, at this time, the inner cavity volume of the third stage cavity 621 decreases, thereby completing the third stage pressurization, and the inner cavity volume of the fourth stage cavity 622 increases, thereby receiving the gas pressurized from the third stage cavity 621.

[0049] It can be understood that, since the inner diameters of the first stage cavity 611, the second stage cavity 612, the third stage cavity 621 and the fourth stage cavity 622 decrease in turn according to the serial numbers, the effect of step-by-step pressurization can be achieved during the rotation of the rotating shaft 31.

[0050] It can be understood that the rapid pressurization device of the present application can be used for pressurizing gas or liquid to output high-pressure gas or high-pressure liquid.

[0051] The rapid pressurizing device of the present application drives the rotating shaft to rotate through the motor, and then drives the crank shaft to rotate, and simultaneously drives multiple pressurizing components to move synchronously under the cooperation of the linkage structure, so that multiple-stage cavities are pressurized step by step. The present application realizes the miniaturization design of the pressurizing pump, and can quickly output high pressure through a small-power motor, so as to meet the miniaturization and integration requirements of the pressure instrument automatic verification device.

[0052] The present application further provides a pressure verification instrument, which comprises the rapid pressurizing device described above, and rapidly pressurizes through the rapid pressurizing device to output verification pressure to the instrument to be tested.

[0053] It should be noted that the rotatable connection relationship described in the present application can be achieved through the cooperation between the pivot and the pivot hole, for example, one element can be rotatably connected to another element, then pivot holes can be formed in the corresponding positions of the two elements, and then the pivot is inserted into the pivot holes of the two elements to achieve rotatable connection. But not limited to this.

[0054] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A rapid pressurization device, characterized in that: include: The main body, driving mechanism, crankshaft assembly, supercharging assembly, linkage structure and cylinder block; The crankshaft assembly is rotatably disposed on the body; The driving mechanism is used to drive the crankshaft assembly to rotate; The booster assembly includes a piston rod and a piston. The piston is movably disposed in the cylinder cavity and divides the cylinder cavity into two cavities with variable volumes. One end of the piston rod penetrates into one of the cavities and is fixedly connected to the piston, while the other end extends out of the cylinder and is connected to the linkage structure. The linkage structure is linked to the crankshaft assembly and the piston rod, and is used to convert the rotational motion of the crankshaft assembly into the linear motion of the piston along the inner cavity of the cylinder.

2. A rapid pressurization device according to claim 1, characterized in that: In the two cavities with variable volumes, each cavity is respectively provided with an inlet and an outlet, and an inlet one-way valve is provided at the inlet and an outlet one-way valve is provided at the outlet. The outlet of the cavity that does not penetrate into the piston rod is connected to the inlet of the cavity that penetrates into the piston rod through a pipeline.

3. A rapid pressurization device according to claim 1, characterized in that: It also includes a sealing structure, which is fixed on the cylinder body and slidably sleeved on the piston rod, and is used to seal the gap between the piston rod and the cylinder body so that the cavity deep into the piston rod remains in a sealed state.

4. A rapid pressurization device according to claim 1, characterized in that: The crankshaft assembly includes a rotating shaft, a crank and a crank shaft. The rotating shaft is rotatably arranged on the main body. The rotating shaft and the crank shaft are respectively fixed on both sides of the crank, and the axis of the rotating shaft and the crank shaft are staggered. The driving assembly drives the rotating shaft to rotate to drive the crank shaft to rotate relative to the axis of the rotating shaft.

5. A rapid pressurization device according to claim 4, characterized in that: The linkage structure is an elliptical track, which is fixedly set at the end of the piston rod away from the piston. The long axis of the elliptical track is larger than the diameter of the crank shaft, and the short axis of the elliptical track is adapted to the diameter of the crank shaft. The crank shaft is sleeved in the elliptical track, and the rotating shaft rotates to drive the crank shaft to slide along the elliptical track, pushing the piston rod to move in a straight line.

6. A rapid pressurization device according to claim 4, characterized in that: It also includes an auxiliary rotating shaft and an auxiliary crank. One end of the auxiliary rotating shaft is rotatably arranged on the main body, and the other end is fixedly connected to the auxiliary crank. The auxiliary rotating shaft and the rotating shaft are coaxially arranged, and the crank shaft is fixedly connected between the auxiliary crank and the crankshaft.

7. A rapid pressurization device according to claim 4, characterized in that: There are at least two supercharging assemblies, at least two linkage structures and at least two cylinder blocks respectively. The crankshaft includes at least two crankshaft parts arranged at intervals. The at least two supercharging assemblies, at least two linkage structures, at least two cylinder blocks and at least two crankshaft parts correspond to each other one by one. Each linkage structure is linked to the corresponding crankshaft part and the corresponding supercharging assembly, and converts the rotational motion of each crankshaft part around the axis of the rotating shaft into linear motion of the corresponding supercharging assembly along the corresponding cylinder block.

8. A rapid pressurization device according to claim 7, characterized in that: The at least two crankshaft parts include a first crankshaft part and a second crankshaft part, wherein the first crankshaft part and the second crankshaft part are spaced apart and arranged on the crankshaft; at least two boost assemblies including a first boost assembly and a second boost assembly; The at least two linkage structures include a first linkage structure and a second linkage structure; The at least two cylinders include a first cylinder and a second cylinder, wherein the first cylinder is provided with a first cylinder inner cavity and the second cylinder is provided with a second cylinder inner cavity; The first linkage structure is an elliptical track provided on the first supercharging component, and the second linkage structure is an elliptical track provided on the second supercharging component. The first linkage structure is sleeved on the first crankshaft portion, and the second linkage structure is sleeved on the second crankshaft portion.

9. A rapid pressurization device according to claim 8, characterized in that: The first booster assembly includes a first piston and a first piston rod. The first-stage piston is movably disposed in the first cylinder cavity and divides the first cylinder cavity into a first-stage cavity and a second-stage cavity with variable volumes. The second boosting assembly includes a second piston and a second piston rod. The second-stage piston is movably disposed in the second cylinder cavity and divides the second cylinder cavity into a third-stage cavity and a fourth-stage cavity with variable volumes. The first-level cavity, the second-level cavity, the third-level cavity and the fourth-level cavity are connected in sequence according to the level number. Each level of cavity is provided with an inlet and an outlet, and the outlet of the previous level cavity is connected to the inlet of the next level cavity. The variable volumes of the first-stage cavity, the second-stage cavity, the third-stage cavity, and the fourth-stage cavity decrease in sequence according to the level number; or The variable volume of the first-stage cavity is greater than the variable volume of the second-stage cavity, the variable volume of the second-stage cavity is equal to the variable volume of the third-stage cavity, and the variable volume of the third-stage cavity is greater than the variable volume of the fourth-stage cavity.

10. A pressure calibrator, characterized in that: The pressure calibrator comprises the rapid pressurization device according to any one of claims 1 to 9.

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