CN213580487U - Automatic pressure volume controller - Google Patents
Automatic pressure volume controller Download PDFInfo
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- CN213580487U CN213580487U CN202022746531.9U CN202022746531U CN213580487U CN 213580487 U CN213580487 U CN 213580487U CN 202022746531 U CN202022746531 U CN 202022746531U CN 213580487 U CN213580487 U CN 213580487U
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Abstract
The utility model discloses an automatic pressure volume controller, which comprises a motor, a cylinder body and a ball screw, wherein the cylinder body is provided with a pressure output joint, the ball screw is sleeved with a sheath, and the sheath is connected and fixed between the cylinder body and the motor; the front end of sheath is fixed with the sheath front stall, and the rear end is fixed with the sheath back seat, and the sheath is connected fixedly through its sheath front stall and cylinder body rear end, and the sheath still is connected fixedly through its sheath back seat and motor simultaneously. The utility model discloses a step motor drives with the lead screw cooperationThe movable piston directly compresses the flowable medium in the cylinder body, the volume change can be measured by calculating the step number of the stepping motor, and the measurement precision reaches 1mm3And the precision of the output pressure reaches +/-1 kPa. And the structural design between the motor and the cylinder body ensures that the whole device has higher structural stability, and can improve the transmission stability of the device during working, thereby being beneficial to ensuring the required measurement precision and output pressure precision.
Description
Technical Field
The utility model relates to a ground detects technical field, concretely relates to be applied to ground indoor test triaxial shear test's automatic pressure volume controller.
Background
The construction of the engineering project cannot be supported by a large amount of geotechnical test data, in the conventional geotechnical test methods, the triaxial shear test is the most basic and important test method, geotechnical strength parameters under different stress paths can be obtained through the triaxial shear test, and the reliability of the parameters has important influence on the safety reliability and economic rationality in the engineering project construction process.
The triaxial shear apparatus is used as a main test apparatus for triaxial shear tests and mainly comprises a pressure system, an axial pressurization system and a measurement system. At present, a widely used domestic pressure system is a semi-automatic control type, such as a semi-automatic cabinet type controller produced by Nanjing soil instrument factory, the pressure control precision is low and is about 10kPa, and the error can cause a large error on the measurement of the shear strength and the pore pressure value of the soil sample in the test process, thereby influencing the accuracy of the rock and soil test result. Although some automatic pressure controllers are available at present, improvement in structural stability, running stability, and convenience of use is desired.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility modelAiming at the defects in the prior art, the structure design is more reasonable, the structure stability is higher, the use is more convenient, the pressure control and the volume change measurement are combined into a whole, a microcomputer interface can be arranged to receive the control of a computer, the pressure resolution can reach +/-1 kPa, and the volume change resolution can reach +/-1 mm3The pressure control is more stable, and the detection result can be more accurate.
In order to solve the technical problem, the utility model adopts the following technical scheme: an automatic pressure volume controller comprises a motor and a hydraulic cylinder body, wherein a flowable medium for providing loading pressure is sealed in the cylinder body through a piston, and the piston is connected with the motor through a ball screw to form a pressurization control structure for the flowable medium in the cylinder body; the cylinder body is provided with pressure output joint, the inside flowable medium of pressure output joint intercommunication cylinder body, its characterized in that: a protective sleeve is sleeved on the ball screw and is fixedly connected between the cylinder body and the motor to form a protective structure for the ball screw; the front end of the sheath is fixed with a sheath front seat, the rear end of the sheath is fixed with a sheath rear seat, the sheath is fixedly connected with the rear end of the cylinder body through the sheath front seat, and meanwhile, the sheath is fixedly connected with the motor through the sheath rear seat, so that the structural stability of the whole transmission system is higher, the stability in the adjusting process is also higher, and the pressure volume control with higher precision is favorably obtained; be provided with the vacuum pressure gauge on the cylinder body, vacuum pressure gauge intercommunication cylinder body inner space and pressure output connect to the pressure value of real-time supervision output improves the convenience.
Furthermore, the cylinder body is arranged on a base, a guide rail is further arranged on the base behind the cylinder body, and the motor is arranged on the guide rail to form an adjusting structure capable of moving back and forth towards the cylinder body.
Furthermore, the front end of the cylinder body is provided with a front plate, the rear end of the cylinder body is provided with a rear plate, and the front plate and the rear plate are connected and fixed through a pull rod; and a screw nut is fixed on the rear end surface of the rear plate through a bolt and is sleeved on a ball screw outside the cylinder body.
Furthermore, the sheath front seat and the lead screw nut are screwed up and fixed to realize connection with the cylinder body, the sheath rear seat is connected with a rear seat plate, the rear seat plate is fixed on the motor mounting plate, and the front end of the motor is assembled and fixed with the motor mounting plate.
Furthermore, a slide seat connecting plate is fixedly connected to the bottom end of the motor mounting plate, the slide seat connecting plate is mounted on a slide seat, and the slide seat is mounted on the guide rail, so that the motor can form a structure capable of moving back and forth.
Further, a pressure sensor is installed on the base and communicated with the cylinder body through a pipeline to form a measuring mechanism for the output pressure value of the cylinder body.
Further, the motor adopts a stepping motor, and the change of 1mm on the flowable medium is accurately realized through the steps of the motor3The accuracy is controlled so that the accuracy of the output pressure is + -1 kPa.
Furthermore, the ball screw is connected with an output shaft of the motor through a coupler, and the coupler is completely covered in the rear part of the sheath; the sheath is made of rubber material.
Preferably, the bottom cover plate is arranged at the bottom of the base, so that the stability of the device is improved, and the base is made of stainless steel.
Preferably, the motor may be provided with a microcomputer interface for connection to a computer for a higher degree of automation.
Furthermore, a limit switch is arranged on the base beside the motor and fixed on the base through screws, so that a motor limit structure for limiting the forward and backward movement range of the motor is formed, and the motor is ensured to operate within a set range.
The controller starts the motor according to the instruction, the motor drives the coupler, the coupler drives the ball screw, the ball screw pushes the piston to move and compress the flowable medium in the cylinder body, the flowable medium is enabled to generate volume change, continuous pressure is generated, the pressure sensor feeds the current pressure value back to the controller, and the controller is convenient to control the working state of the motor so as to achieve the target pressure value. The controller can accurately measure the volume change of the flowable medium by calculating the number of steps of the motor to reach 1mm3Accuracy of change of flowable medium, corresponding delivery pressure essenceThe degree is. + -. 1 kPa.
The utility model discloses a step motor and the flowable medium in the lead screw cooperation drive piston direct compression cylinder body, pressure is adjusted through closed loop control. The volume change can be measured by calculating the step number of the stepping motor, and the measurement precision reaches 1mm3And the precision of the output pressure reaches +/-1 kPa. Its mechanical structure is simple, and the regulation precision is higher, can conveniently receive computer control through being equipped with the computer interface, and structural design between motor and the cylinder body makes whole device have higher structural stability, can improve the transmission stationarity of device during operation simultaneously to be favorable to guaranteeing its required measurement accuracy and output pressure precision.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a plan view of the structure of the present invention (the state of the vacuum pressure gauge is removed).
In the figure, 1 is a base, 2 is a bottom cover plate, 3 is a cylinder body, 4 is a front plate, 5 is a rear plate, 6 is a piston, 7 is a ball screw, 8 is a screw nut, 9 is a guide rail, 10 is a slide seat, 11 is a motor mounting plate, 12 is a slide seat connecting plate, 13 is a vacuum pressure gauge, 14 is a sheath front seat, 15 is a sheath rear seat, 16 is a rear seat plate, 17 is a sheath, 18 is a bolt, 19 is a motor, 20 is a coupler, 21 is a pressure sensor, 22 is a pressure output connector, and 23 is a limit switch.
Detailed Description
The invention will be further explained by means of specific embodiments with reference to the accompanying drawings:
in this embodiment, referring to fig. 1 and fig. 2, the automatic pressure volume controller includes a motor 19 and a hydraulic cylinder 3, a flowable medium (such as a water body, air, an oil body, etc.) for providing a loading pressure is sealed in the cylinder 3 by a piston 6, the piston 6 is connected with the motor 19 by a ball screw 7, so as to form a pressurization control structure for the flowable medium inside the cylinder 3; the cylinder 3 is provided with a pressure output joint 22, and the pressure output joint 22 is communicated with the flowable medium in the cylinder 3; a protective sleeve 17 is sleeved on the ball screw 7, and the protective sleeve 17 is connected and fixed between the cylinder body 3 and the motor 19 to form a protective structure for the ball screw 7; the front end of the sheath 17 is fixed with a sheath front seat 14, the rear end is fixed with a sheath rear seat 16, the sheath 17 is fixedly connected with the rear end of the cylinder 3 through the sheath front seat 14, and meanwhile, the sheath 17 is fixedly connected with the motor 19 through the sheath rear seat 15, so that the structural stability of the whole transmission system is higher, the stability in the adjusting process is higher, and the pressure volume control with higher precision is favorably obtained; the cylinder 3 is provided with a vacuum pressure gauge 13, and the vacuum pressure gauge 13 is communicated with the inner space of the cylinder 3 and a pressure output joint 22 so as to monitor the output pressure value in real time.
The cylinder body 3 is arranged on a base 1, a guide rail 9 is further arranged on the base 1 behind the cylinder body 3, and a motor 19 is arranged on the guide rail 9 to form an adjusting structure capable of moving forward and backward towards the cylinder body 3.
The front end of the cylinder body 3 is provided with a front plate 4, the rear end of the cylinder body is provided with a rear plate 5, and the front plate 4 and the rear plate 5 are connected and fixed through a pull rod; a screw nut 8 is fixed on the rear end face of the rear plate 5 through a bolt 18, and the screw nut 8 is sleeved on a ball screw 7 positioned outside the cylinder 3.
The front sheath seat 14 and the screw nut 8 are screwed and fixed to realize connection with the cylinder body 3, the rear sheath seat 15 is connected with a rear seat plate 16, the rear seat plate 16 is fixed on the motor mounting plate 11, and the front end of the motor 19 is assembled and fixed with the motor mounting plate 11.
A slide seat connecting plate 12 is fixedly connected to the bottom end of the motor mounting plate 11, the slide seat connecting plate 12 is mounted on a slide seat 10, and the slide seat 10 is mounted on the guide rail 9, so that the motor 19 can move back and forth.
A pressure sensor 21 is installed on the base 1, the pressure sensor 21 is communicated with the cylinder body 3 through a pipeline to form a measuring mechanism for outputting a pressure value to the cylinder body 3, the pressure value is fed back to a control system in real time to adjust the forward and backward movement of the stepping motor 1 in real time, and the output of a target pressure value is realized. The pressure value of the pressure sensor 21 at the lower part of the hydraulic cylinder 3 can be calibrated by the vacuum pressure gauge 13.
The motor 19 adopts a stepping motor, and the change of 1mm of the flowable medium is realized by the step number of the motor 193Control of accuracy to make outputThe accuracy of the pressure is + -1 kPa.
The ball screw 7 is connected with an output shaft of the motor 19 through a coupler 20, and the coupler 20 is completely covered in the rear part of the sheath 17; the sheath 17 is made of a rubber material.
The bottom cover plate 2 is arranged at the bottom of the base 1, so that the stability of the device is improved, and the base 1 is made of stainless steel.
The motor 19 may be provided with a microcomputer interface for connection to a computer in order to achieve a higher degree of automation.
A limit switch 23 is arranged on the base 1 beside the motor 19, and the limit switch 23 is fixed on the base 1 through screws to form a motor limit structure for limiting the forward and backward movement range of the motor 19, so that the motor 19 is ensured to operate within a set range.
The controller starts the motor 19 according to the instruction, the motor 19 drives the coupler 20, the coupler 20 drives the ball screw 7, the ball screw 7 pushes the piston 6 to move and compress the flowable medium in the cylinder 3, the flowable medium generates volume change, continuous pressure is generated, the current pressure value is fed back to the controller by the pressure sensor 21, and the controller is convenient to control the working state of the motor 19 so as to achieve the target pressure value. The controller can accurately measure the volume change of the flowable medium by calculating the number of steps of the motor to reach 1mm3The accuracy of the change in the flowable medium corresponds to an output pressure accuracy of + -1 kPa.
The above detailed description of the present invention is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto, i.e. all equivalent changes and modifications made in accordance with the scope of the present invention should be covered by the present invention.
Claims (10)
1. An automatic pressure volume controller comprises a motor and a hydraulic cylinder body, wherein a flowable medium for providing loading pressure is sealed in the cylinder body through a piston, and the piston is connected with the motor through a ball screw to form a pressurization control structure for the flowable medium in the cylinder body; the cylinder body is provided with pressure output joint, the inside flowable medium of pressure output joint intercommunication cylinder body, its characterized in that: a protective sleeve is sleeved on the ball screw and is fixedly connected between the cylinder body and the motor to form a protective structure for the ball screw; the front end of the sheath is fixed with a sheath front seat, the rear end of the sheath is fixed with a sheath rear seat, the sheath is fixedly connected with the rear end of the cylinder body through the sheath front seat, and meanwhile, the sheath is fixedly connected with the motor through the sheath rear seat; the cylinder body is provided with a vacuum pressure gauge which is communicated with the inner space of the cylinder body and a pressure output joint.
2. The automatic pressure volume controller of claim 1, wherein: the cylinder body is arranged on a base, a guide rail is further arranged on the base behind the cylinder body, and the motor is arranged on the guide rail to form an adjusting structure capable of moving back and forth towards the cylinder body.
3. The automatic pressure volume controller of claim 2, wherein: the front end of the cylinder body is provided with a front plate, the rear end of the cylinder body is provided with a rear plate, and the front plate and the rear plate are connected and fixed through a pull rod; and a screw nut is fixed on the rear end surface of the rear plate through a bolt and is sleeved on a ball screw outside the cylinder body.
4. The automatic pressure volume controller of claim 3, wherein: the sheath front seat with screw-nut screws up fixedly in order to realize being connected with the cylinder body, and the sheath back seat is connected with a back bedplate, and the back bedplate is fixed on the motor mounting panel, and the front end and the motor mounting panel assembly of motor are fixed.
5. The automatic pressure volume controller of claim 4, wherein: the bottom end of the motor mounting plate is fixedly connected with a slide seat connecting plate which is arranged on a slide seat, and the slide seat is arranged on a guide rail, so that the motor forms a structure capable of moving back and forth.
6. The automatic pressure volume controller of claim 3, wherein: a pressure sensor is installed on the base and is communicated with the cylinder body through a pipeline to form a measuring mechanism for the output pressure value of the cylinder body.
7. The automatic pressure volume controller of claim 6, wherein: the motor adopts a stepping motor, and the change of the flowable medium by 1mm is realized through the steps of the motor3Controlling the precision so that the precision of the output pressure is +/-1 kPa; the motor is provided with a microcomputer interface for connecting a computer.
8. The automatic pressure volume controller of claim 1, wherein: the ball screw is connected with an output shaft of the motor through a coupler, and the coupler is completely covered in the rear part of the sheath; the sheath is made of rubber material.
9. The automatic pressure volume controller of claim 1, wherein: the bottom of the base is provided with a bottom cover plate, and the base is made of stainless steel.
10. The automatic pressure volume controller of claim 1, wherein: a limit switch is arranged on the base beside the motor and is fixed on the base through screws, so that a motor limit structure for limiting the forward and backward movement range of the motor is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022746531.9U CN213580487U (en) | 2020-11-23 | 2020-11-23 | Automatic pressure volume controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022746531.9U CN213580487U (en) | 2020-11-23 | 2020-11-23 | Automatic pressure volume controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213580487U true CN213580487U (en) | 2021-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022746531.9U Active CN213580487U (en) | 2020-11-23 | 2020-11-23 | Automatic pressure volume controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213580487U (en) |
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2020
- 2020-11-23 CN CN202022746531.9U patent/CN213580487U/en active Active
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