CN217129715U - Liquid pressure source assembly and portable calibration device - Google Patents
Liquid pressure source assembly and portable calibration device Download PDFInfo
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- CN217129715U CN217129715U CN202220247211.5U CN202220247211U CN217129715U CN 217129715 U CN217129715 U CN 217129715U CN 202220247211 U CN202220247211 U CN 202220247211U CN 217129715 U CN217129715 U CN 217129715U
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Abstract
The embodiment of the utility model discloses liquid pressure source subassembly and portable calibration equipment sets up the cavity in the cylinder body, and the piston rod is at least partly arranged in the cavity, and the part that the piston rod was arranged in the cavity has first end and second end, and first end structure volume changeable first compression chamber, and the second end constructs the volume changeable second compression chamber, and the piston rod reciprocating motion between first position and second position in the cavity, in the first position to the second position motion process, compress the second compression chamber, and second compression chamber and first compression chamber fluid intercommunication; the piston rod compresses the first compression chamber during the movement of the piston rod from the second position to the first position, and the second compression chamber is fluidly blocked from the first compression chamber. The piston rod pressurizes liquid in each motion direction in the reciprocating motion, so that pressurization in a bidirectional two-stage compression mode is achieved, and liquid pressurization efficiency can be improved.
Description
Technical Field
The utility model relates to a pressure control field especially relates to a liquid pressure source subassembly and portable calibration equipment.
Background
In recent years, the pressure instrument calibration equipment industry in China is rapidly developed, the traditional piston pressure gauge mode is gradually replaced by an intelligent automatic pressure control device, the rapid development of science and technology and the continuous maturity of social division of labor promote workers providing calibration, calibration and other calibration services to leave a laboratory and enter an industrial field to provide efficient calibration services, and the demand of the field calibration services on a portable calibration device is more and more urgent.
A hydraulic pressure source assembly such as an electric hydraulic pump is a common component of a portable liquid verification device, and can compress a liquid medium to provide a pressure source for a portable liquid verification device. A related electric hydraulic pump structure is shown in fig. 1, and includes an oil cylinder 100B having a piston 100A disposed therein, the piston 100A being connected to a lead screw 100C, the lead screw 100C being connected to a rotating shaft of a motor 100D. When the hydraulic compressor works, the rotating shaft of the motor 100D rotates to drive the lead screw 100C to rotate, and the lead screw 100C rotates to drive the piston 100A to move to compress the liquid working medium in the oil cylinder 100B to output pressure.
The electric hydraulic pump adopts a mode of pressurizing a screw rotating shaft to realize pressurization, and the pressurization efficiency needs to be improved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a liquid pressure source subassembly and portable calibration equipment can improve liquid pressurization efficiency.
The embodiment of the utility model provides an adopt following technical scheme:
a liquid pressure source assembly comprising:
the cylinder body is provided with a cavity;
a piston rod at least partially disposed in the cavity, the portion of the piston rod disposed in the cavity having a first end and a second end, the first end configuring a first compression chamber (high pressure cylinder) with a variable volume, the second end configuring a second compression chamber (low pressure cylinder) with a variable volume, the maximum volume of the first compression chamber being less than the maximum volume of the second compression chamber;
the piston rod reciprocates between a first position and a second position in the cavity, wherein the piston rod compresses the second compression chamber (low pressure cylinder) during movement from the first position to the second position, the second compression chamber (low pressure cylinder) being in fluid communication with the first compression chamber (high pressure cylinder); and in the process that the piston rod moves to the first position from the second position, the first compression cavity (high-pressure cylinder) is compressed, and the second compression cavity (low-pressure cylinder) is in fluid blocking with the first compression cavity (high-pressure cylinder).
In one possible embodiment, the cavity is a coherent cavity, and the first compression chamber and the second compression chamber are both disposed within the cavity.
In one possible embodiment, the second end is arranged in the middle of the piston rod.
In one possible embodiment, the second compression chamber is annular.
In one possible embodiment, a connecting fluid path is arranged between the first compression chamber (high pressure cylinder) and the second compression chamber (low pressure cylinder), a first one-way valve is arranged on the connecting fluid path, and the first one-way valve controls the connection and disconnection of the connecting fluid path;
the first check valve is configured to open the connecting line when the fluid in the second compression chamber (low pressure cylinder) flows to the first compression chamber (high pressure cylinder).
In one possible embodiment, the connecting fluid passage and the first check valve are provided in the piston rod.
In one possible embodiment, the piston rod compresses the first compression chamber (high pressure cylinder) during the movement of the second position to the first position, the first compression chamber (high pressure cylinder) outputs pressure fluid, and the second compression chamber (low pressure cylinder) is replenished with fluid.
In a possible embodiment, the cylinder body is provided with an output pipeline, the output pipeline is communicated with the first compression cavity (high-pressure cylinder), a second one-way valve is arranged on the output pipeline, the second one-way valve controls the on-off of the output pipeline, and the second one-way valve is configured to open the output pipeline when the first compression cavity (high-pressure cylinder) outputs pressure liquid.
In one possible embodiment, the piston compresses the second compression chamber (low pressure cylinder) during the movement of the first position to the second position, and the fluid in the second compression chamber (low pressure cylinder) replenishes the first compression chamber (high pressure cylinder).
In a possible embodiment, the cylinder body is provided with a liquid suction path communicated with the second compression cavity (low-pressure cylinder), the liquid suction path is provided with a third one-way valve, and the third one-way valve controls the on-off of the liquid suction path;
the third check valve is configured to open the fluid intake path when fluid is replenished to the second compression chamber (low pressure cylinder) via the fluid intake path.
In one possible embodiment, the cylinder body is provided with an overflow liquid path, an overflow valve is arranged on the overflow liquid path, the overflow valve controls the on-off of the overflow liquid path, and the overflow liquid path is communicated with the second compression cavity (low-pressure cylinder);
the overflow valve is configured to open when the pressure of the liquid in the second compression chamber (low pressure cylinder) is greater than the set pressure, and the liquid in the second compression chamber (low pressure cylinder) is discharged through the overflow liquid path to relieve the pressure in the second compression chamber (low pressure cylinder).
In one possible embodiment, the hydraulic pressure source assembly further comprises a transmission assembly;
the piston rod is connected with the transmission assembly, and the transmission assembly provides reciprocating power for the piston rod, so that the piston rod can reciprocate between a first position and a second position in the cavity.
In one possible embodiment, the transmission assembly comprises: the eccentric shaft is connected with the motor rotating shaft, the eccentric shaft is connected with the oscillating bar, and the oscillating bar is connected with the piston rod.
A portable verification device comprising a hydraulic pressure source assembly as described above.
Based on the liquid pressure source assembly and the portable calibration device of the technical scheme, a cavity is arranged in a cylinder body, at least part of a piston rod is arranged in the cavity, the part, arranged in the cavity, of the piston rod is provided with a first end and a second end, the first end is provided with a first compression cavity with variable volume, the second end is provided with a second compression cavity with variable volume, the piston rod reciprocates between a first position and a second position in the cavity, the second compression cavity is compressed in the process of moving from the first position to the second position, and the second compression cavity is communicated with the first compression cavity in a fluid mode; the piston rod compresses the first compression chamber during the movement of the piston rod from the second position to the first position, and the second compression chamber is fluidly blocked from the first compression chamber. The piston rod pressurizes liquid in each motion direction in the reciprocating motion, so that pressurization in a bidirectional two-stage compression mode is achieved, and liquid pressurization efficiency can be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic illustration of a prior art hydraulic pressure source assembly;
fig. 2 is a schematic structural diagram of a hydraulic pressure source assembly according to an embodiment of the present invention;
fig. 3 is a second schematic structural diagram of a hydraulic pressure source assembly according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The first mentioned in the embodiments of the present application is only used as a name identification and does not represent the first in order, and the rule is also applicable to the second and so on. Unless otherwise specified, "first" and "second" are used herein to refer to different, e.g., the first check valve and the second check valve are different check valves.
As shown in fig. 2 and 3, an embodiment of the present invention provides a liquid pressure source assembly, including:
the cylinder body 10 is provided with a cavity.
A piston rod 20 at least partially disposed in the cavity, wherein the portion of the piston rod 20 disposed in the cavity has a first end 101 and a second end 102, the first end 101 is configured as a first compression chamber (high pressure cylinder) a with a variable volume as shown in fig. 3, the second end 102 is configured as a second compression chamber (low pressure cylinder) B with a variable volume as shown in fig. 2, and the maximum volume of the first compression chamber a is smaller than the maximum volume of the second compression chamber B. The part of the piston rod 20 disposed in the cavity is sealed with the inner wall of the cavity, and specifically, as shown in fig. 2 and 3, a sealing ring C and a sealing ring D are disposed between the first compression cavity (low pressure cylinder) a and the second compression cavity (low pressure cylinder) B; and a sealing ring E is arranged between the second compression cavity (low pressure cylinder) B and the outside.
The piston rod 20 reciprocates in the cavity between a first position and a second position, wherein fig. 2 shows the piston rod 20 in the first position and fig. 3 shows the piston rod 20 in the second position. The piston rod compresses the second compression cavity (low pressure cylinder) B during the movement from the first position to the second position, and the second compression cavity (low pressure cylinder) B is communicated with the first compression cavity (high pressure cylinder) in a fluid mode; and in the process that the piston rod moves to the first position from the second position, the first compression cavity (high-pressure cylinder) A is compressed, and the second compression cavity (low-pressure cylinder) B is blocked from the first compression cavity (high-pressure cylinder) in a fluid mode.
In one possible embodiment, as shown in fig. 2 and 3, the cavity is a coherent cavity, i.e. the cavity is a one-piece body with no break in the middle. The first compression cavity A and the second compression cavity B are arranged in the cavity.
In one possible embodiment, as shown in fig. 2 and 3, the second end is disposed in the middle of the piston rod 20.
In one possible embodiment, as shown in fig. 2 and 3, the second compression chamber B has an annular shape. Specifically, the second compression cavity B is a circular cavity surrounding the axial direction of the piston rod 20.
In one possible embodiment, as shown in fig. 2 and 3, a connection hydraulic path 103 is provided between the first compression chamber (high pressure cylinder) a and the second compression chamber (low pressure cylinder) B, a first check valve 104 is provided on the connection hydraulic path, and the first check valve 104 controls on/off of the connection hydraulic path; the first check valve 104 is configured to open the connecting line 103 when the fluid in the second compression chamber (low pressure cylinder) B flows to the first compression chamber (high pressure cylinder) a.
Specifically, the first check valve 104 is disposed in the connecting pipeline 103, and blocks the liquid in the first compression cavity (low pressure cylinder) a from flowing to the second compression cavity (high pressure cylinder) B; the flow of the liquid in the second compression chamber (low pressure cylinder) B to the first compression chamber (high pressure cylinder) a is not blocked. Thereby realizing one-way flow of the liquid in the second compression chamber (low pressure cylinder) B to the first compression chamber (high pressure cylinder) A.
In one possible embodiment, the connecting fluid path 103 and the first check valve 104 are disposed in the piston rod 20. Compared with the connecting liquid path 103 and the first check valve 104 which are arranged outside the cylinder 10, the arrangement of the connecting liquid path 103 and the first check valve 104 in the piston rod 20 can reduce the number of the hydraulic pressure source components, thereby facilitating miniaturization.
In one possible embodiment, the piston rod 20 compresses the first compression chamber (high pressure cylinder) a during the movement of the second position to the first position, the pressure of the fluid in the first compression chamber (high pressure cylinder) a increases, and the first compression chamber (high pressure cylinder) a outputs the pressure fluid. Meanwhile, the volume of the second compression chamber (low pressure cylinder) B is increased, and the second compression chamber (low pressure cylinder) B is replenished with liquid, namely liquid is sucked.
In one possible embodiment, when the piston rod 20 compresses the second compression chamber (low pressure cylinder) B during the movement from the first position to the second position, the liquid in the second compression chamber (low pressure cylinder) B replenishes the liquid in the first compression chamber (high pressure cylinder) a.
In one possible embodiment, the cylinder 10 is provided with an output pipeline 105, the output pipeline 105 is communicated with the first compression cavity (high pressure cylinder) a, a second one-way valve 106 is arranged on the output pipeline 105, the second one-way valve 106 controls the on-off of the output pipeline 105, and the second one-way valve 106 is configured to open the output pipeline 105 when the first compression cavity (high pressure cylinder) a outputs pressure liquid.
Specifically, the second check valve 106 is disposed in the output pipeline 105, and blocks the liquid in the output pipeline 105 from flowing to the first compression chamber (high pressure cylinder) a; the flow of pressure fluid in the first compression chamber (high pressure cylinder) a to the outlet line 105 is not blocked. Thereby achieving a unidirectional flow of fluid in the first compression chamber (low pressure cylinder) a to the outlet line 105.
In one possible embodiment, the cylinder 20 is provided with an overflow liquid path 107, the overflow liquid path is provided with an overflow valve 108, the overflow valve 108 controls the on-off of the overflow liquid path 107, and the overflow liquid path 107 is communicated with the second compression chamber (low pressure cylinder) B;
the relief valve 108 is configured such that when the pressure of the fluid in the second compression chamber (low pressure cylinder) B is higher than the set pressure, the relief valve 108 opens, and the fluid in the second compression chamber (low pressure cylinder) B is discharged through the relief fluid passage to relieve the pressure in the second compression chamber (low pressure cylinder).
Specifically, the set pressure is determined according to the overflow valve 108, different specifications and models of the overflow valve 108 may have different pressure relief thresholds, and in specific implementation, adaptation selection may be performed according to different requirements.
In one possible embodiment, the cylinder 10 is provided with a liquid suction path 109 communicating with the second compression chamber (low pressure cylinder) B, the liquid suction path 109 is provided with a third check valve 110, and the third check valve 110 controls the on-off of the liquid suction path 109;
the third check valve 110 is configured to open the liquid suction path 109 when the liquid is replenished to the second compression chamber (low pressure cylinder) a through the liquid suction path 109.
Specifically, the third check valve 110 is disposed in the liquid suction path 109, and blocks the liquid in the second compression chamber (low pressure cylinder) B from flowing to the liquid suction path 109; the flow of the pressure liquid in the liquid suction path 109 to the second compression chamber (low pressure cylinder) B is not blocked. Thereby realizing one-way liquid flow in the liquid suction path 109 to the output pipeline 105.
In one possible embodiment, as shown in fig. 2 and 3, the hydraulic pressure source assembly further comprises a transmission assembly;
the piston rod 20 is connected to the drive assembly, which provides reciprocating power to the piston rod such that the piston rod 20 reciprocates between a first position and a second position within the cavity.
In one possible embodiment, the transmission assembly comprises: the device comprises a motor 111, an eccentric shaft 112 and a swing rod 113, wherein the rotating shaft of the motor is connected with the eccentric shaft 112, the eccentric shaft 112 is connected with the swing rod 113, and the swing rod 113 is connected with the piston rod 20 through a pin 114.
The utility model discloses the implementation provides a portable calibration equipment, include as above the hydraulic pressure source subassembly.
The utility model discloses hydraulic pressure source subassembly and portable calibration equipment of embodiment sets up the cavity in the cylinder body, and the piston rod is at least partly arranged in the cavity, and the part that the piston rod was arranged in the cavity has first end and second end, and first end structure variable volume first compression chamber, and the second end constructs variable volume second compression chamber, and the piston rod reciprocating motion between first position and second position in the cavity, in the first position to the second position motion process, compresses the second compression chamber, and second compression chamber and first compression chamber fluid intercommunication; the piston rod compresses the first compression chamber during the movement of the piston rod from the second position to the first position, and the second compression chamber is fluidly blocked from the first compression chamber. The piston rod pressurizes liquid in each motion direction in the reciprocating motion, so that pressurization in a bidirectional two-stage compression mode is achieved, and liquid pressurization efficiency can be improved.
The operation of the hydraulic pressure source module according to the embodiment of the present invention will be described. As shown in fig. 2 and 3, the hydraulic pressure source assembly includes: a motor 111, an eccentric shaft 112 and a swing rod 113,
the eccentric shaft 112 is driven by the motor 111 to rotate, the eccentric shaft 112 drives one end of the swing rod 113 to swing, and the other end of the swing rod 113 drives the piston rod 20 to reciprocate left and right;
when the hydraulic pressure source assembly works for the first time, the first compression cavity (high-pressure cylinder) A and the second compression cavity (low-pressure cylinder) B suck liquid, and the implementation process is as follows:
as shown in fig. 2, the piston rod 20 moves to the left, the liquid inside the first compression cavity (high pressure cylinder) a is compressed, the second compression cavity (low pressure cylinder) B forms negative pressure, external liquid is sucked into the second compression cavity (low pressure cylinder) B through the liquid suction path 109, and liquid suction and compression of the first compression cavity (high pressure cylinder) a are completed synchronously.
The second compression cavity (low pressure cylinder) B realizes the following compression process:
the piston rod 20 moves rightward, and the liquid in the second compression chamber (low pressure cylinder) B is compressed and then flows into the first compression chamber (high pressure cylinder) a through the connection fluid path 103. When the pressure output by the output pipeline 105 is smaller than the opening threshold of the overflow valve 108, the liquid in the second compression cavity (low pressure cylinder) B continuously flows into the first compression cavity (high pressure cylinder) a, and the pressure liquid in the first compression cavity (high pressure cylinder) a flows out through the output pipeline 105 through the second check valve 106 to provide a liquid pressure source for subsequent components. When the pressure of the output pipeline 105 is greater than the opening threshold of the overflow valve 108, after the first compression chamber (high pressure cylinder) a is filled with the liquid in the second compression chamber (low pressure cylinder) B, the excess liquid is discharged through the overflow valve 108 and the overflow liquid path 107.
The first compression chamber (high pressure cylinder) A realizes the following compression process:
the piston rod 20 moves leftwards, after the liquid in the first compression cavity (high pressure cylinder) A is compressed, the liquid is discharged through the output pipeline 105 through the second one-way valve 106, flows out of the output one-way valve 12 and flows into the high pressure output port 13, and the compression process of the first compression cavity (high pressure cylinder) A and the liquid suction process of the second compression cavity (low pressure cylinder) B are synchronously completed. The compression process of the second compression cavity (low pressure cylinder) B and the compression process of the first compression cavity (high pressure cylinder) A are alternately carried out, so that liquid can be sucked in from the liquid sucking path 109, and the required pressure is output through the output pipeline 105 after continuous compression and pressurization.
The utility model discloses hydraulic pressure source subassembly sets up first compression chamber and second compression chamber, and first compression chamber and second compression chamber are at same axis, and first compression chamber is opposite with second compression chamber compression direction to improve compression efficiency. Set up pipeline and check valve in piston rod inside, the first compression chamber of liquid and second compression chamber pass through pipeline intercommunication in the piston rod and do not reduce pressure loss, improve pressurization efficiency. The middle portion enters the high pressure side of the flow direction.
The utility model discloses hydraulic pressure source subassembly has outstanding ability from inhaling, is full of the air in the pipeline before fluid pressure sets up, and the hydraulic pump can rely on outstanding ability evacuation pipeline air from inhaling for liquid is continuous to be inhaled the imbibition mouth, need not to fill liquid.
The liquid pressure source assembly provided by the embodiment of the utility model has the variable flow function, and has the large flow characteristic in the small pressure conveying stage and the small flow characteristic in the large pressure conveying stage by virtue of the first compression cavity with the overflow function; the first compression cavity and the second compression cavity work in series, the second compression cavity is used for compression in a small pressure stage, the smaller first compression cavity is used for compression in a large pressure stage, and therefore the phenomenon that power consumption is increased sharply along with the rise of pressure is avoided, and power consumption is saved.
The utility model discloses liquid pressure source subassembly, inside use the sealed mode of automatic compensation, do not rely on medium viscosity to maintain sealedly.
The utility model discloses embodiment the utility model discloses hydraulic pressure source subassembly can be used to portable hydraulic pressure calibration equipment, provides the hydraulic pressure source for portable hydraulic pressure calibration equipment, can be so that portable hydraulic pressure calibration equipment can better controlgear weight and volume, and the on-the-spot check-up of the portable hydraulic pressure calibration equipment realization high-pressure liquid pressure instrument of being more convenient for use.
It should be noted that any of the above-described device embodiments are merely schematic, where units illustrated as separate components may or may not be physically separate, and components illustrated as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiments of the network node provided by the present application, a connection relationship between modules indicates that there is a communication connection therebetween, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (14)
1. A fluid pressure source assembly, comprising:
the cylinder body is internally provided with a cavity;
a piston rod disposed at least partially within the cavity, the portion of the piston rod disposed within the cavity having a first end and a second end, the first end defining a first compression chamber of variable volume and the second end defining a second compression chamber of variable volume, the first compression chamber having a maximum volume less than a maximum volume of the second compression chamber;
the piston rod reciprocates in the cavity between a first position and a second position, wherein the piston rod compresses the second compression chamber during movement from the first position to the second position, the second compression chamber being in fluid communication with the first compression chamber; the piston rod compresses the first compression chamber during movement from the second position to the first position, and the second compression chamber is fluidly blocked from the first compression chamber.
2. The hydraulic pressure source assembly of claim 1, wherein the cavity is a coherent cavity, and the first compression chamber and the second compression chamber are both disposed within the cavity.
3. The hydraulic pressure source assembly of claim 1, wherein the second end is disposed in a middle portion of the piston rod.
4. The hydraulic pressure source assembly of claim 3, wherein the second compression chamber is annular.
5. The hydraulic pressure source assembly according to any one of claims 1 to 4, wherein a connecting liquid path is arranged between the first compression chamber and the second compression chamber, a first check valve is arranged on the connecting liquid path, and the first check valve controls the connection liquid path to be opened or closed;
the first check valve is configured to open the connecting fluid path when fluid in the second compression chamber flows to the first compression chamber.
6. The hydraulic pressure source assembly of claim 5, wherein the connecting fluid passage and the first one-way valve are disposed in the piston rod.
7. The hydraulic pressure source assembly of any one of claims 1-4, wherein the piston rod compresses the first compression chamber during movement of the second position to the first position, the first compression chamber outputting pressurized fluid while the second compression chamber is replenished.
8. The hydraulic pressure source assembly as recited in claim 7, wherein the cylinder body is provided with an output line, the output line is communicated with the first compression chamber, a second one-way valve is arranged on the output line, the second one-way valve controls the on-off of the output line, and the second one-way valve is configured to open the output line when the first compression chamber outputs pressure liquid.
9. The hydraulic pressure source assembly of any one of claims 1-4, wherein the piston rod compresses the second compression chamber during movement from the first position to the second position, and wherein fluid in the second compression chamber replenishes the first compression chamber.
10. The hydraulic pressure source assembly as recited in claim 9, wherein the cylinder is provided with a liquid suction path communicated with the second compression chamber, a third check valve is arranged on the liquid suction path, and the third check valve controls the on-off of the liquid suction path;
the third one-way valve is configured to open the suction fluid path when fluid is replenished to the second compression chamber through the suction fluid path.
11. The hydraulic pressure source assembly as claimed in any one of claims 1 to 4, wherein the cylinder is provided with an overflow liquid path, an overflow valve is arranged on the overflow liquid path, the overflow valve is used for controlling the on-off of the overflow liquid path, and the overflow liquid path is communicated with the second compression cavity;
the overflow valve is configured to open when the pressure of the liquid in the second compression cavity is greater than the pressure set by the overflow valve, and the liquid in the second compression cavity is discharged through the overflow liquid path to relieve the pressure of the second compression cavity.
12. The hydraulic pressure source assembly of any one of claims 1-4, further comprising a transmission assembly;
the piston rod is connected with the transmission assembly, and the transmission assembly provides reciprocating power for the piston rod, so that the piston rod can reciprocate between a first position and a second position in the cavity.
13. The hydraulic pressure source assembly of claim 12, wherein the transmission assembly comprises: the eccentric shaft is connected with the rotating shaft of the motor, the eccentric shaft is connected with the oscillating rod, and the oscillating rod is connected with the piston rod.
14. A portable verification device comprising a hydraulic pressure source assembly as claimed in any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220247211.5U CN217129715U (en) | 2022-01-30 | 2022-01-30 | Liquid pressure source assembly and portable calibration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220247211.5U CN217129715U (en) | 2022-01-30 | 2022-01-30 | Liquid pressure source assembly and portable calibration device |
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| CN217129715U true CN217129715U (en) | 2022-08-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483695A (en) * | 2022-01-30 | 2022-05-13 | 北京康斯特仪表科技股份有限公司 | Liquid pressure checking device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483695A (en) * | 2022-01-30 | 2022-05-13 | 北京康斯特仪表科技股份有限公司 | Liquid pressure checking device |
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