CN211116859U - Hydraulic power pressurization control system of pressure testing machine - Google Patents
Hydraulic power pressurization control system of pressure testing machine Download PDFInfo
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- CN211116859U CN211116859U CN201922339358.8U CN201922339358U CN211116859U CN 211116859 U CN211116859 U CN 211116859U CN 201922339358 U CN201922339358 U CN 201922339358U CN 211116859 U CN211116859 U CN 211116859U
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Abstract
The utility model discloses a hydraulic power pressurization control system of a pressure tester, belonging to the field of a pressure tester power device, it comprises a hydraulic pump, the inlet of the hydraulic pump is communicated with an oil tank, the outlet of the hydraulic pump is communicated with a supercharging device, a speed regulating valve is communicated between the hydraulic pump and an oil inlet of the supercharging device, the supercharging device comprises a cylinder body, a first cavity and a second cavity which are communicated with each other are arranged in the cylinder body, the diameter of the first cavity is smaller than that of the second cavity, a first piston is coaxially and slidably connected in the first chamber, a second piston is coaxially and slidably connected in the second chamber, the first piston and the second piston are coaxially and fixedly connected, an oil outlet of the supercharging device is communicated with one end, far away from the second cavity, of the first cavity, and an oil inlet of the supercharging device is communicated with one end, far away from the first cavity, of the second cavity. The utility model discloses have the effect that prevents the damage of governing valve when carrying out the speed governing to higher oil pressure.
Description
Technical Field
The utility model relates to a pressure test machine power device technical field, more specifically say, it relates to a pressure test machine hydraulic power pressure boost control system.
Background
The pressure tester is mainly used for the compression strength test of building materials such as bricks, cement mortar, concrete and the like, and can also be used for the mechanical property test of other materials. Most of the current pressure testing machines provide the source of pressure mainly from hydraulic power.
At present, a Chinese practical patent with a publication number of CN207406582U discloses a hydraulic device of an intelligent electrohydraulic pressure tester, which comprises an oil tank, a hydraulic oil pump and a jack which are sequentially communicated, wherein a pipeline between the hydraulic oil pump and the jack is connected with a speed regulating valve; when the hydraulic testing machine works, the hydraulic oil pump works to pressurize and convey the hydraulic oil in the oil tank to the jack, the jack is used for providing pressure required by work for the pressure testing machine, the speed regulating valve is used for regulating the flow rate of the hydraulic oil conveyed to the jack by the hydraulic oil pump, and then the stretching speed of the jack is controlled.
The above prior art solutions have the following drawbacks: however, most of the existing speed regulating valves are only suitable for regulating the speed of hydraulic oil with the oil pressure less than 32Mpa, and cannot be suitable for regulating the speed of hydraulic oil with higher pressure. However, the maximum hydraulic power oil pressure of the current pressure tester reaches more than 70 Mpa. When the oil pressure is greater than 32Mpa, the speed regulating valve has a large error, and even the speed regulating valve may be damaged.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing a compression testing machine hydraulic power pressure boost control system has the effect that reduces the possibility of the damage of governing valve.
The above object of the present invention can be achieved by the following technical solutions: a hydraulic power pressurization control system of a pressure testing machine comprises a hydraulic pump, wherein an inlet of the hydraulic pump is communicated with an oil tank, an outlet of the hydraulic pump is communicated with a pressurization device, a speed regulating valve is communicated between an oil inlet of the hydraulic pump and an oil inlet of the pressurization device, an oil outlet of the pressurization device is communicated with a jack, the pressurization device comprises a cylinder body, a first cavity and a second cavity which are communicated with each other are arranged in the cylinder body, the first cavity and the second cavity are both cylindrical and coaxially arranged, the diameter of the first cavity is smaller than that of the second cavity, a first piston is coaxially and slidably connected in the first cavity, a second piston is coaxially and slidably connected in the second cavity, the first piston and the second piston are coaxially and fixedly connected, an oil outlet of the pressurization device is communicated with one end of the first cavity, which is far away from the second cavity, an oil inlet of the pressurization device is communicated with one end of the second cavity, which is far away from, and one end of the second chamber, which is close to the first chamber, is communicated with a pressure relief pipe.
Through adopting above-mentioned technical scheme, the hydraulic pump carries hydraulic oil to the second cavity to promote the second piston to slide, the second piston drives first piston and slides, pushes the hydraulic oil in the first cavity into the jack, makes the jack stretch. Because the area of the second piston is larger than that of the first piston and the thrust force of the second piston is equal to that of the first piston, the pressure on the end surface of the first piston is larger than that on the end surface of the second piston, and the effect of increasing the pressure is achieved. At the moment, the ratio between the flow rate of the hydraulic oil in the first cavity and the flow rate of the hydraulic oil in the second cavity is equal to the ratio between the area of the end face of the first piston and the area of the end face of the second piston, the flow rate of the hydraulic oil at the low oil pressure end is controlled by using the speed regulating valve, so that the flow rate of the hydraulic oil at the high oil pressure end can be controlled, and the oil pressure regulated by the speed regulating valve is in the range of the speed regulating valve, so that the speed regulating.
The present invention may be further configured in a preferred embodiment as: the pressure relief pipe is communicated with the bottom of the oil tank.
Through adopting above-mentioned technical scheme, when the jack shrink, first piston and second piston reset, and the hydraulic oil in the oil tank is inhaled the space between first piston and the first piston to lubricate cylinder body inner wall in this space.
The present invention may be further configured in a preferred embodiment as: the side wall of one end of the first cavity, which is close to the second cavity, is provided with an annular inclined surface, and the pressure relief pipe is provided with a switch valve.
By adopting the technical scheme, the jack is firstly stretched and then is added. In the stretching process, when the first piston passes through the inclined plane and is not attached to the side wall of the first cavity, the space between the first piston and the second piston is compressed, and at the moment, the switch valve on the pressure relief pipe is closed, so that hydraulic oil in the space between the first piston and the second piston is pressed into the jack, and the jack with a longer adaptive stroke can be provided. When the jack is abutted to a sample and needs larger pressure (an increasing process), the switch valve on the pressure relief pipe is opened, and the increasing structure is utilized to provide larger pressure to liquid for the jack.
The present invention may be further configured in a preferred embodiment as: and a connecting shaft is coaxially and fixedly connected between the first piston and the second piston.
Through adopting above-mentioned technical scheme, utilize the connecting axle to realize the fixed connection of first piston and second piston.
The present invention may be further configured in a preferred embodiment as: and round chamfers are arranged at the joint between the connecting shaft and the first piston and the joint between the connecting shaft and the second piston.
Through adopting above-mentioned technical scheme, alleviate the condition of the stress concentration of junction between connecting axle and the first piston and the junction between connecting axle and the second piston.
The present invention may be further configured in a preferred embodiment as: and a hydraulic sensor is arranged between the speed regulating valve and the supercharging device.
By adopting the technical scheme: the ratio between the pressure of the hydraulic oil in the first chamber and the pressure of the hydraulic oil in the second chamber is equal to the ratio between the end surface area of the first piston and the end surface area of the second piston, and the pressure of the hydraulic oil at the low oil pressure end is detected by the hydraulic sensor, so that the pressure of the hydraulic oil at the high oil pressure end can be detected, and the hydraulic sensor is not easy to damage because the pressure sensor detects the pressure of the hydraulic oil at the low oil pressure end.
The present invention may be further configured in a preferred embodiment as: the lateral wall of one end, far away from the first cavity, of the second cavity is communicated with a pressure-relief pipe, the pressure-relief pipe is communicated with the oil tank, and the pressure-relief pipe is provided with a switch valve.
By adopting the technical scheme: when the jack is not needed to work, the switch valve of the pressure discharge pipe is opened, and the hydraulic oil in the second cavity is discharged out and discharged back to the oil storage tank.
The present invention may be further configured in a preferred embodiment as: a plurality of communicating runners are circumferentially arranged on the end face of one end, close to the first cavity, of the second cavity, and the communicating runners are communicated with the side wall of the first cavity.
By adopting the technical scheme: the jack is firstly stretched and then increased. In the process of stretching, when first piston did not seal the intercommunication circulation yet, the space between first, the second piston was compressed, and the ooff valve on the pressure release pipe was closed this moment, made the hydraulic oil in the space between first, the second piston impress in the jack, when the jack contradicted in the sample needs bigger pressure (increase process), opened the ooff valve on the pressure release pipe, utilized and increased the structure and provide pressure intensity for the jack bigger to liquid.
To sum up, the utility model discloses a following at least one useful technological effect:
firstly, the low pressure is pressurized to the high pressure by utilizing the pressurizing device, the ratio of the flow speed of the hydraulic oil in the first cavity to the flow speed of the hydraulic oil in the second cavity is equal to the ratio of the area of the end surface of the first piston to the area of the end surface of the second piston, and the flow speed of the hydraulic oil at the low oil pressure end is controlled by utilizing the speed regulating valve, so that the flow speed of the hydraulic oil at the high oil pressure end can be controlled, and the oil pressure regulated by the speed regulating valve is in the range of the speed regulating valve, and.
And secondly, an annular inclined plane is formed in the side wall of one end, close to the second chamber, of the first chamber, when the first piston is not attached to the side wall of the first chamber through the inclined plane, the space between the first piston and the second piston is compressed, and at the moment, the switch valve on the pressure relief pipe is closed, so that hydraulic oil in the space between the first piston and the second piston is pressed into the jack, when the jack is abutted to a sample needing larger pressure (an increasing process), the switch valve on the pressure relief pipe is opened, the pressure is provided for the jack by using the increasing structure to be larger than liquid, and the jack can be longer in adapting stroke.
Third, a plurality of intercommunication runners have been seted up to one end terminal surface circumference that the second cavity is close to first cavity, intercommunication runner is in the lateral wall intercommunication of first cavity, when first piston has not closed the intercommunication circulation, it is first, space between the second piston is compressed, the ooff valve on the pressure release pipe is closed this moment, make first, hydraulic oil in the space between the second piston is impressed in the jack, when the jack is contradicted when the sample needs bigger pressure (increase process), open the ooff valve on the pressure release pipe, utilize to increase the structure and provide pressure for the jack and bigger to liquid, can be for adapting to the longer jack of stroke.
Drawings
FIG. 1 is a schematic diagram of an oil circuit according to the present embodiment;
FIG. 2 is a sectional view of the present embodiment for showing a supercharging device;
fig. 3 is a sectional view showing another structure of the supercharging apparatus according to the present embodiment.
Reference numerals: 100. a hydraulic pump; 101. an oil outlet pipe; 102. a speed regulating valve; 103. a hydraulic pressure sensor; 200. an oil tank; 300. a pressure boosting device; 301. a cylinder body; 302. a first chamber; 303. a second chamber; 304. a first piston; 305. a second piston; 306. a connecting shaft; 307. rounding and chamfering; 308. a pressure relief pipe; 309. a bevel; 310. a flow passage is communicated; 311. a pressure discharge pipe; 400. a jack.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): as shown in fig. 1, for the utility model discloses a pressure testing machine hydraulic power pressure boost control system, including hydraulic pump 100, hydraulic pump 100's import intercommunication has oil tank 200, and the storage has hydraulic oil in the oil tank 200. The outlet of the hydraulic pump 100 is communicated with a pressure increasing device 300 which can increase the pressure of the hydraulic oil through an oil outlet pipe 101. The oil outlet of the pressure increasing device 300 is communicated with a jack 400, and the jack 400 is used for providing pressure required by the operation of the pressure testing machine.
As shown in fig. 1, the oil outlet pipe 101 is communicated with a speed control valve 102, the speed control valve 102 is used for controlling the flow rate of the hydraulic oil at the low oil pressure end, so that the flow rate of the hydraulic oil at the high oil pressure end can be controlled, and the oil pressure regulated by the speed control valve 102 is in the range of the oil pressure, so that the damage possibility of the speed control valve 102 is reduced. A hydraulic sensor 103 is arranged between the speed regulating valve 102 and the supercharging device 300, the pressure of the hydraulic oil at the low oil pressure end is detected by the hydraulic sensor 103, so that the pressure of the hydraulic oil at the high oil pressure end can be detected, and the hydraulic sensor 103 is not easy to damage because the hydraulic sensor 103 detects the pressure of the hydraulic oil at the low oil pressure end.
As shown in fig. 2, the supercharging device 300 includes a cylinder 301 having a cylindrical shape. A first cavity 302 and a second cavity 303 which are communicated with each other are arranged in the cylinder body 301, the first cavity 302 and the second cavity 303 are both cylindrical and are coaxially arranged, and the diameter of the first cavity 302 is larger than that of the second cavity 303. A first piston 304 is coaxially slidably connected within the first chamber 302 and a second piston 305 is coaxially slidably connected within the second chamber 303. A connecting shaft 306 is coaxially and fixedly connected between the first piston 304 and the second piston 305. Round chamfers 307 are arranged at the joint between the connecting shaft 306 and the first piston 304 and the joint between the connecting shaft 306 and the second piston 305, and stress concentration at the joint between the connecting shaft 306 and the first piston 304 and the joint between the connecting shaft 306 and the second piston 305 is relieved by the round chamfers 307.
As shown in fig. 2, the oil outlet pipe 101 communicates with the end of the second chamber 303 far from the first chamber 302, and the jack 400 communicates with the end of the first chamber 302 far from the second chamber 303. The hydraulic pump 100 delivers hydraulic oil to the second chamber 303, so as to push the second piston 305 to slide, the second piston 305 drives the first piston 304 to slide, and the hydraulic oil in the first chamber 302 is pushed into the jack 400, so that the jack 400 is extended. Because the diameter of the first chamber 302 is larger than that of the second chamber 303, the area of the second piston 305 is larger than that of the first piston 304, and the thrust forces to the two are equal, the pressure to the end face of the first piston 304 is larger than the pressure to the end face of the second piston 305, thereby achieving the effect of increasing the hydraulic pressure. At this time, the ratio between the flow rate of the hydraulic oil in the first chamber 302 and the flow rate of the hydraulic oil in the second chamber 303 is equal to the ratio between the area of the end surface of the first piston 304 and the area of the end surface of the second piston 305; the ratio between the pressure of the hydraulic oil in the first chamber 302 and the pressure of the hydraulic oil in the second chamber 303 is equal to the ratio between the area of the end surface of the first piston 304 and the area of the end surface of the second piston 305.
As shown in fig. 1 and 2, one end of the second chamber 303 close to the first chamber 302 is communicated with a pressure relief pipe 308, and the pressure relief pipe 308 is communicated with the bottom of the oil tank 200. The pressure relief pipe 308 is provided with an on-off valve. The sidewall of the first chamber 302 near the second chamber 303 is formed with an annular inclined surface 309.
As shown in fig. 1 and 2, the supercharging control system is divided into a stroke portion and a supercharging portion. A stroke part: when the switch valve on the pressure relief pipe 308 is closed, the hydraulic pump 100 drives the first piston 304 to move upward by using oil pressure, and the first piston 304 passes through the inclined surface 309 and is not yet engaged with the side wall of the first chamber 302, the space between the first piston 304 and the second piston 305 is compressed, and at this time, the hydraulic oil in the space between the first piston 304 and the second piston 305 is pressed into the jack 400, so that the stroke and the expansion and contraction speed of the jack 400 are increased. A pressurization part: when the switch valve on the pressure relief pipe 308 is opened, the redundant hydraulic oil in the space between the first and second pistons 305 enters the oil tank 200, and the pressure is increased to liquid by the aid of the adding structure for providing the jack 400 with higher pressure.
Instead of the inclined plane 309, as shown in fig. 3, a plurality of communication flow channels 310 may be circumferentially disposed on an end surface of the second chamber 303 close to the first chamber 302, and another end of the communication flow channel 310 is communicated with a side wall of the first chamber 302. The function of the communication flow passage 310 and the inclined surface 309 can achieve the same effect.
As shown in fig. 1 and 2, a pressure discharge pipe 311 is communicated with a side wall of one end of the second chamber 303, which is far away from the first chamber 302, the pressure discharge pipe 311 is communicated with the oil tank 200, and a switch valve is mounted on the pressure discharge pipe 311. When the jack 400 is not required to be operated, the on-off valve of the pressure discharge pipe 311 is opened, and the hydraulic oil in the second chamber 303 is discharged out and returned to the oil reservoir 200.
The specific working principle of this embodiment is as follows: the boost control system operates in a split stroke and boost portion. A stroke part: the switch valve on the pressure relief pipe 308 is closed, the hydraulic pump 100 drives the first piston 304 to move upwards by using oil pressure, the first piston 304 is not yet attached to the side wall of the first chamber 302 through the inclined surface 309, the space between the first piston 304 and the second piston 305 is compressed, and at the moment, hydraulic oil in the space between the first piston 304 and the second piston 305 is pressed into the jack 400, so that the stroke and the expansion speed of the jack 400 are increased. A pressurization part: when the switch valve on the pressure relief pipe 308 is opened, the redundant hydraulic oil in the space between the first and second pistons 305 enters the oil tank 200, and the pressure is increased to liquid by the aid of the adding structure for providing the jack 400 with higher pressure.
The flow rate of the hydraulic oil at the low oil pressure end is controlled by the speed regulating valve 102, so that the flow rate of the hydraulic oil at the high oil pressure end can be controlled, and the oil pressure regulated by the speed regulating valve 102 is within the range of the measuring range, so that the speed regulating valve 102 is prevented from being damaged. A hydraulic sensor 103 is arranged between the speed regulating valve 102 and the supercharging device 300, the pressure of the hydraulic oil at the low oil pressure end is detected by the hydraulic sensor 103, so that the pressure of the hydraulic oil at the high oil pressure end can be detected, and the hydraulic sensor 103 is not easy to damage because the pressure sensor detects the pressure of the hydraulic oil at the low oil pressure end.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a pressure testing machine hydraulic power pressure boost control system, includes hydraulic pump (100), the import intercommunication of hydraulic pump (100) has oil tank (200), its characterized in that: an outlet of the hydraulic pump (100) is communicated with a supercharging device (300), a speed regulating valve (102) is communicated between oil inlets of the hydraulic pump (100) and the supercharging device (300), an oil outlet of the supercharging device (300) is communicated with a jack (400), the supercharging device (300) comprises a cylinder body (301), a first chamber (302) and a second chamber (303) which are communicated with each other are arranged in the cylinder body (301), the first chamber (302) and the second chamber (303) are both cylindrical and coaxially arranged, the diameter of the first chamber (302) is smaller than that of the second chamber (303), a first piston (304) is coaxially and slidably connected in the first chamber (302), a second piston (305) is coaxially and slidably connected in the second chamber (303), and the first piston (304) and the second piston (305) are coaxially and fixedly connected, an oil outlet of the pressure boosting device (300) is communicated with one end, far away from the second cavity (303), of the first cavity (302), an oil inlet of the pressure boosting device (300) is communicated with one end, far away from the first cavity (302), of the second cavity (303), and one end, close to the first cavity (302), of the second cavity (303) is communicated with a pressure relief pipe (308).
2. The hydraulic power pressurization control system of the compression testing machine according to claim 1, characterized in that: the pressure relief pipe (308) is communicated with the bottom of the oil tank (200).
3. The hydraulic power pressurization control system of the compression testing machine according to claim 2, characterized in that: an annular inclined plane (309) is formed in the side wall of one end, close to the second cavity (303), of the first cavity (302), and a switch valve is installed on the pressure relief pipe (308).
4. The hydraulic power pressurization control system of the compression testing machine according to claim 3, characterized in that: a connecting shaft (306) is coaxially and fixedly connected between the first piston (304) and the second piston (305).
5. The hydraulic power pressurization control system of the compression testing machine according to claim 4, characterized in that: and round chamfers (307) are arranged at the joint between the connecting shaft (306) and the first piston (304) and the joint between the connecting shaft (306) and the second piston (305).
6. The hydraulic power pressurization control system of the compression testing machine according to claim 5, characterized in that: and a hydraulic sensor (103) is arranged between the speed regulating valve (102) and the supercharging device (300).
7. The hydraulic power pressurization control system of the compression testing machine according to claim 5, characterized in that: the side wall of one end, far away from the first cavity (302), of the second cavity (303) is communicated with a pressure discharge pipe (311), the pressure discharge pipe (311) is communicated with the oil tank (200), and the pressure discharge pipe (311) is provided with a switch valve.
8. The hydraulic power pressurization control system of the compression testing machine according to claim 4, characterized in that: a plurality of communicating flow channels (310) are circumferentially arranged on the end face of one end, close to the first cavity (302), of the second cavity (303), and the communicating flow channels (310) are communicated with the side wall of the first cavity (302).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922339358.8U CN211116859U (en) | 2019-12-20 | 2019-12-20 | Hydraulic power pressurization control system of pressure testing machine |
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| CN201922339358.8U CN211116859U (en) | 2019-12-20 | 2019-12-20 | Hydraulic power pressurization control system of pressure testing machine |
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| CN211116859U true CN211116859U (en) | 2020-07-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727857A (en) * | 2020-12-29 | 2021-04-30 | 萨驰智能装备股份有限公司 | Hydraulic pressurization system and tire vulcanizer |
| CN114734369A (en) * | 2022-06-13 | 2022-07-12 | 中国航发上海商用航空发动机制造有限责任公司 | Pressurizing container, pressurizing device, finishing device and pressurizing method of hydraulic oil |
-
2019
- 2019-12-20 CN CN201922339358.8U patent/CN211116859U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727857A (en) * | 2020-12-29 | 2021-04-30 | 萨驰智能装备股份有限公司 | Hydraulic pressurization system and tire vulcanizer |
| CN114734369A (en) * | 2022-06-13 | 2022-07-12 | 中国航发上海商用航空发动机制造有限责任公司 | Pressurizing container, pressurizing device, finishing device and pressurizing method of hydraulic oil |
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