Hydraulic supercharging device capable of preventing power impact

Abstract

The utility model provides a hydraulic supercharging device capable of preventing power impact. The high-pressure end cover plate and the low-pressure end cover plate are connected with the two ends of the supercharger cylinder barrel respectively, and the supercharger piston rod is arranged in an inner cavity of the supercharger cylinder barrel. An inner cavity of the supercharger cylinder barrel comprises a low-pressure cavity body and a high-pressure cavity body, the supercharger piston rod comprises a high-pressure end and a low-pressure end, and a buffer is arranged on the section of the low-pressure end connected with the high-pressure end. Therefore, based on the pressure balance principle, under the condition that the liquid volume is not changed, the variable-diameter piston assembly composed of the high-pressure end and the low-pressure end which are different in section area in the supercharger piston rod can avoid the impact effect of the supercharger piston rod on the supercharger cylinder barrel when hydraulic amplification is achieved during liquid conveying.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure equipment, in particular to a hydraulic pressure boosting device for preventing power impact. Background Art

[0002] In some pressure equipment working environments, higher hydraulic pressure needs to be input to achieve the purpose of high pressure output of the pressure equipment. At present, the pressure directly generated by high-pressure gas is limited, and it is difficult to achieve direct high pressure output at low cost and high efficiency. Therefore, the existing technology relies more on introducing a booster pump with higher technical parameters to achieve the purpose of increasing hydraulic pressure, but the booster pump has high cost, high energy consumption, high noise, and is easily damaged in ultra-high pressure working environment.

[0003] The pressure balance principle is the theoretical basis for designing hydraulic amplifiers. When the liquid volume remains unchanged, the variable diameter piston assembly can achieve the purpose of hydraulic amplification. However, when the piston rod moves toward the high-pressure chamber, if the liquid output at the low-pressure end is not terminated, the piston rod will dynamically impact the step on the inner wall of the cylinder and cause damage to the cylinder.

[0004] In view of this, it is necessary to design a hydraulic booster device that is resistant to dynamic impact to solve the above problems. Utility Model Content

[0005] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a hydraulic booster device that is resistant to dynamic impact. Based on the principle of pressure balance, a variable diameter piston assembly is provided to prevent dynamic impact. While achieving hydraulic amplification, the impact of the piston rod on the booster cylinder can be avoided.

[0006] To achieve the above-mentioned purpose, the utility model provides a hydraulic booster device for preventing dynamic impact, comprising: a booster cylinder, a high-pressure end cover plate connected to one end of the booster cylinder, a low-pressure end cover plate connected to the other end of the booster cylinder, and a booster piston rod movably arranged in the booster cylinder; the booster cylinder comprises a cylinder wall, an inner cavity embedded in the cylinder wall, a limiting hole connecting the inner cavity with the outside world, and an oil inlet hole connecting the inner cavity with the outside world; the booster piston rod moves in the inner cavity of the booster cylinder.

[0007] Furthermore, the inner cavity of the supercharger cylinder includes a low-pressure cavity close to the low-pressure end cover plate and a high-pressure cavity connected to the low-pressure cavity.

[0008] Furthermore, the booster piston rod comprises a low-pressure end with one end close to the low-pressure end cover plate and a high-pressure end connected to the other end of the low-pressure end.

[0009] Furthermore, the cross-sectional area of ​​the high-pressure end=the cross-sectional area of ​​the high-pressure cavity<the cross-sectional area of ​​the low-pressure end=the cross-sectional area of ​​the low-pressure cavity.

[0010] Furthermore, a plurality of buffers are evenly arranged in an annular direction on the cross section of the low-pressure end connected to the high-pressure end; the number of the buffers is not less than three.

[0011] Furthermore, the buffer includes one or more of a spring and a rubber ball.

[0012] Furthermore, the limiting hole is arranged on the low-pressure cavity at one end close to the high-pressure cavity; and the oil inlet hole is arranged on the high-pressure cavity at one end away from the low-pressure cavity.

[0013] Furthermore, a high-pressure liquid joint is provided on the high-pressure end cover plate; and a low-pressure liquid joint is provided on the low-pressure end cover plate.

[0014] Furthermore, the high-pressure end cover plate is connected to one end of the supercharger cylinder through a plurality of high-pressure end fastening nuts; the low-pressure end cover plate is connected to the other end of the supercharger cylinder through a plurality of low-pressure end fastening nuts.

[0015] The beneficial effects of the utility model are:

[0016] 1. The hydraulic booster device for preventing dynamic impact provided by the utility model comprises a high-pressure end cover plate and a low-pressure end cover plate respectively connected to the two ends of the booster cylinder, and a booster piston rod movably arranged in the inner cavity of the booster cylinder; wherein the inner cavity of the booster cylinder comprises a low-pressure cavity close to the low-pressure end cover plate and a high-pressure cavity connected to the low-pressure cavity; the booster piston rod comprises a high-pressure end and a low-pressure end connected to the high-pressure end, and a buffer is arranged on the cross section of the low-pressure end connected to the high-pressure end; thus, based on the principle of pressure balance, while realizing hydraulic amplification, the impact of the booster piston rod on the booster cylinder when the liquid (or oil) in the high-pressure cavity is exhausted can be reduced.

[0017] 2. The hydraulic booster device for preventing power shock provided by the utility model can be used to monitor the position of the booster piston rod in the booster cylinder to prevent the low-pressure end of the booster piston rod from failing to work normally due to running to the end of the low-pressure cavity by setting a limit hole that connects the inner cavity of the booster cylinder with the outside world; at the same time, when the booster piston rod compresses the internal gas and generates resistance due to movement, it can also be used as an exhaust hole to balance the pressure difference; lubricating oil can also be injected into the booster cylinder through the limit hole to reduce the resistance generated by the movement of the booster piston rod. In addition, when the booster piston rod moves to the point where its low-pressure end is against the variable cross-section, liquid or oil can be injected into the set oil inlet hole to push the booster piston rod back to the initial position to ensure the normal progress of subsequent experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic structural diagram of a hydraulic pressure boosting device for preventing dynamic impact provided by the present invention.

[0019] Figure 2 The utility model is a cross-sectional view of a cylinder barrel of a booster in a hydraulic booster device for preventing power impact.

[0020] Figure 3 The present invention is a structural diagram of a piston rod of a booster in a hydraulic booster device for preventing power impact provided by the present invention.

[0021] Reference numerals

[0022] 1-booster cylinder; 11-cylinder wall; 121-low-pressure cavity; 122-high-pressure cavity; 13-limiting hole; 14-oil inlet hole; 15-hole; 2-high-pressure end cover; 3-low-pressure end cover; 4-high-pressure end fastening nut; 5-low-pressure end fastening nut; 6-high-pressure liquid connector; 7-low-pressure liquid connector; 8-booster piston rod; 81-high-pressure end; 82-low-pressure end; 83-buffer. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted. In addition, it should also be noted that the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] like Figures 1 to 3As shown, the utility model provides a hydraulic booster device for preventing dynamic impact, comprising: a booster cylinder 1, a high-pressure end cover plate 2 connected to one end of the booster cylinder 1, a low-pressure end cover plate 3 connected to the other end of the booster cylinder 1, and a booster piston rod 8 movably arranged in the booster cylinder 1; the booster cylinder 1 comprises a cylinder wall 11, an inner cavity embedded in the cylinder wall 11, a limiting hole 13 connecting the inner cavity with the external environment and embedded in the cylinder wall 11, and an oil inlet hole 14 connecting the inner cavity with the external environment and embedded in the cylinder wall 11; the booster piston rod 8 moves in the inner cavity of the booster cylinder 1. The inner cavity of the booster cylinder 1 comprises a low-pressure cavity 121 close to the low-pressure end cover plate 3 and a high-pressure cavity 122 connected to the low-pressure cavity 121.

[0026] The booster piston rod 8 includes a low-pressure end 82 with one end close to the low-pressure end cover plate 3 and a high-pressure end 81 connected to the other end of the low-pressure end 82 .

[0027] The cross-sectional area of ​​the high-pressure end 81 = the cross-sectional area of ​​the high-pressure cavity 122 < the cross-sectional area of ​​the low-pressure end 82 = the cross-sectional area of ​​the low-pressure cavity 121 .

[0028] The high-pressure end cover plate 2 is provided with a high-pressure liquid joint 6 ; the low-pressure end cover plate 3 is provided with a low-pressure liquid joint 7 .

[0029] The high-pressure end cover plate 2 is connected to one end of the supercharger cylinder 1 through a plurality of high-pressure end fastening nuts 4; the low-pressure end cover plate 3 is connected to the other end of the supercharger cylinder 1 through a plurality of low-pressure end fastening nuts 5; the high-pressure end cover plate 2 and the low-pressure end cover plate 3 are provided with a plurality of holes for matching and installing the high-pressure end fastening nuts 4 and the low-pressure end fastening nuts 5; the number of holes on the high-pressure end cover plate 2 is the same as the number of the high-pressure end fastening nuts 4; the number of holes on the low-pressure end cover plate 3 is the same as the number of the low-pressure end fastening nuts 5.

[0030] With such arrangement, based on the principle of pressure balance, when the liquid volume remains unchanged, the variable-diameter piston assembly composed of the high-pressure end 81 and the low-pressure end 82 with different cross-sectional areas in the booster piston rod 8 realizes hydraulic amplification while alleviating the impact of the booster piston rod 8 on the booster cylinder 1.

[0031] Specifically, in some embodiments of the present invention, the limiting hole 13 is arranged on the low-pressure cavity 121 near one end of the high-pressure cavity 122 (the position of the limiting hole 13 is closer to the end of the high-pressure cavity 122); the oil inlet hole 14 is arranged on the high-pressure cavity 122 away from one end of the low-pressure cavity 121. The length of the booster piston rod 8 is less than or equal to the distance from the oil inlet hole 14 to the limiting hole 13 in the booster cylinder 1.

[0032] With such arrangement, the limit hole 13 can not only monitor the position of the booster piston rod 8 in the booster cylinder 1 through a probe to prevent the low-pressure end 82 of the booster piston rod 8 from failing to work normally due to running to the end of the low-pressure chamber 121; at the same time, when the booster piston rod 8 compresses the internal gas and generates resistance due to movement, it can also be used as an exhaust hole to balance the pressure difference; and lubricating oil can also be injected into the booster cylinder 1 through the limit hole 13 to reduce the resistance generated by the movement of the booster piston rod 8. In addition, the oil inlet hole 14 is provided for: when the booster piston rod 8 moves to the point where its low-pressure end 82 abuts against the variable cross-section (the variable cross-section is formed by the cross-sections of the high-pressure chamber 122 and the low-pressure chamber 121), the pump connected to the oil inlet hole 14 is started, and liquid or oil is injected into the high-pressure chamber 122 through the oil inlet hole 14 to increase the volume of the liquid or oil in the high-pressure chamber 122, thereby pushing the booster piston rod 8 to move in a straight line from the high-pressure end 81 to the low-pressure end 82 in the booster cylinder 1, so as to prevent the liquid or oil in the high-pressure chamber 122 in the booster cylinder 1 from being exhausted, causing the booster piston rod 8 to get stuck, thereby affecting the subsequent experiments.

[0033] Specifically, in some embodiments of the present invention, a plurality of buffers 83 are evenly arranged annularly on the cross section of the low-pressure end 82 connected to the high-pressure end 81; the number of the buffers 83 is not less than three; and the buffers 83 include one or more of springs and rubber balls.

[0034] Specifically, in some embodiments of the present invention, a plurality of buffers 83 may also be arranged at a variable cross-section formed by the cross-sections of the high-pressure chamber 122 and the low-pressure chamber 121 , and the buffer 83 is located in the inner cavity of the supercharger cylinder 1 .

[0035] Such an arrangement can reduce the impact of the booster piston rod 8 on the booster cylinder 1 when the booster piston rod 8 moves.

[0036] The hydraulic booster device for preventing dynamic impact provided by the utility model will be specifically described below in conjunction with the embodiments.

[0037] Example 1

[0038] like Figures 1 to 3As shown, this embodiment provides a hydraulic booster device for preventing dynamic impact, including: a booster cylinder 1, a high-pressure end cover plate 2 connected to one end of the booster cylinder 1, a low-pressure end cover plate 3 connected to the other end of the booster cylinder 1, and a booster piston rod 8 movably arranged in the booster cylinder 1.

[0039] The supercharger cylinder 1 includes a cylinder wall 11, an inner cavity embedded in the cylinder wall 11, a limit hole 13 that connects the inner cavity with the outside and is set through the cylinder wall 11, and an oil inlet hole 14 that connects the inner cavity with the outside and is set through the cylinder wall 11; the supercharger piston rod 8 moves in the inner cavity of the supercharger cylinder 1. The inner cavity of the supercharger cylinder 1 includes a low-pressure cavity 121 close to the low-pressure end cover plate 3 and a high-pressure cavity 122 connected to the low-pressure cavity 121.

[0040] The booster piston rod 8 includes a low-pressure end 82 with one end close to the low-pressure end cover plate 3 and a high-pressure end 81 connected to the other end of the low-pressure end 82 .

[0041] Four rubber balls are evenly arranged in an annular pattern on the free area of ​​the cross section of the low-pressure end 82 connected to the high-pressure end 81; the cross-sectional area of ​​the high-pressure end 81 = the cross-sectional area of ​​the high-pressure cavity 122 < the cross-sectional area of ​​the low-pressure end 82 = the cross-sectional area of ​​the low-pressure cavity 121.

[0042] The high-pressure end cover plate 2 is connected to one end of the supercharger cylinder 1 through a high-pressure end fastening nut 4; the low-pressure end cover plate 3 is connected to the other end of the supercharger cylinder 1 through a low-pressure end fastening nut 5; the high-pressure end cover plate 2 and the cylinder wall 11 of the supercharger cylinder 1 near one end of the high-pressure end cover plate 2 are correspondingly provided with holes 15 for matching and installing the high-pressure end fastening nut 4; the low-pressure end cover plate 3 and the supercharger cylinder 1 near one end of the low-pressure end cover plate 3 are respectively provided with holes 15 for matching and installing the high-pressure end fastening nut 4. The cylinder wall 11 of the cylinder 1 is provided with corresponding holes 15 for matching and installing the low-pressure end fastening nut 5; the number of holes 15 on the cylinder wall 11 of the high-pressure end cover plate 2 and the end of the supercharger cylinder 1 close to the high-pressure end cover plate 2, and the number of high-pressure end fastening nuts 4 are both six; the number of holes 15 on the cylinder wall 11 of the supercharger cylinder 1 and the end of the low-pressure end cover plate 3 close to the low-pressure end cover plate 3, and the number of low-pressure end fastening nuts 5 are both six;

[0043] The high-pressure end cover plate 2 is penetrated by a high-pressure liquid connector 6 ; the low-pressure end cover plate 3 is penetrated by a low-pressure liquid connector 7 ; the extension direction of the high-pressure liquid connector 6 and the low-pressure liquid connector 7 is consistent with the extension direction of the booster piston rod 8 .

[0044] The limiting hole 13 is arranged on the low-pressure cavity 121 near one end of the high-pressure cavity 122 (the position of the limiting hole 13 is closer to the end of the high-pressure cavity 122); the oil inlet hole 14 is arranged on the high-pressure cavity 122 far from one end of the low-pressure cavity 121. The length of the booster piston rod 8 is less than the distance from the oil inlet hole 14 to the limiting hole 13 in the booster cylinder 1.

[0045] The following is a description of the working process of a hydraulic booster device for preventing power impact provided by the utility model:

[0046] like Figures 1 to 3 As shown, first place the booster piston rod 8 in the inner cavity of the booster cylinder 1 (where the high-pressure end 81 passes through the low-pressure cavity 121 and is inserted into the high-pressure cavity 122); then connect the high-pressure end cover plate 2 to one end of the booster cylinder 1 through the high-pressure end fastening nut 4, and connect the low-pressure end cover plate 3 to the other end of the booster cylinder 1 through the low-pressure end fastening nut 5; wherein the low-pressure end 82 of the booster piston rod 8 is close to the low-pressure end cover plate 3, and the hydraulic booster device for preventing power shock is installed. Then, connect the low-pressure liquid connector 7 on the hydraulic booster device for preventing power shock to the hydraulic output device, and then connect the high-pressure liquid connector 6 on it to the target device, and the device is connected. Next, the hydraulic output device is turned on to input liquid or oil into the low-pressure liquid connector 7, so that a force is applied to the cross section of the low-pressure end 82 of the booster piston rod 8 (the end away from the high-pressure end 81), thereby pushing the booster piston rod 8 to move linearly from the low-pressure cavity 121 to the high-pressure cavity 122 in the booster cylinder 1. When the booster piston rod 8 moves to the point where the low-pressure end 82 abuts against the variable cross section (the variable cross section is composed of the high-pressure cavity 122 and the low-pressure cavity 121), the booster piston rod 8 is pushed to move linearly from the low-pressure cavity 121 to the high-pressure cavity 122. 1 cross section is formed), the pump connected to the oil inlet hole 14 is started, and liquid or oil is injected into the high-pressure cavity 122 through the oil inlet hole 14 to increase the volume of the liquid or oil in the high-pressure cavity 122, thereby pushing the booster piston rod 8 to move linearly from the high-pressure cavity 122 to the low-pressure cavity 121 in the booster cylinder 1, to prevent the liquid in the high-pressure cavity 122 of the booster from being exhausted, causing the booster piston rod 8 to get stuck, affecting the subsequent experiments. Finally, the liquid or oil injected from the oil inlet hole 14 can flow out through the high-pressure liquid connector 6 on the high-pressure end cover plate 2.

[0047] In addition, when the booster piston rod 8 moves linearly from the low-pressure end 82 to the high-pressure end 81, a probe can be inserted into the limit hole 13 to monitor the position of the booster piston rod 8 in the booster cylinder 1 (when the length displayed by the probe in the external environment is shorter, it indicates that the low-pressure end 82 of the booster piston rod 8 is still far away from the variable cross-section; when the length displayed by the probe in the external environment is longer, it indicates that the low-pressure end 82 of the booster piston rod 8 is closer to the variable cross-section). Whether to start the oil pump is determined according to the position of the low-pressure end 82 of the booster piston rod 8 to prevent the low-pressure end 82 of the booster piston rod 8 from failing to work normally due to running to the end of the low-pressure cavity 121; at the same time, when the booster piston rod 8 moves and compresses the internal gas to generate resistance, it can also serve as an exhaust hole to balance the pressure difference; lubricating oil can also be injected into the booster cylinder 1 through the limit hole 13 to reduce the resistance generated when the booster piston rod 8 moves.

[0048] In summary, the utility model provides a hydraulic booster device that prevents dynamic impact. The device is provided with a high-pressure end cover plate 2 and a low-pressure end cover plate 3 respectively connected to the two ends of the booster cylinder, and a booster piston rod movably arranged in the inner cavity of the booster cylinder; wherein the inner cavity of the booster cylinder includes a low-pressure cavity close to the low-pressure end cover plate 3 and a high-pressure cavity connected to the low-pressure cavity, and the booster piston rod includes a high-pressure end 81 and a low-pressure end 82 connected to the high-pressure end 81, and a buffer 83 is arranged on the cross section of the low-pressure end 82 connected to the high-pressure end 81; thus, based on the principle of pressure balance, while achieving hydraulic amplification, the impact of the booster piston rod on the booster cylinder can be reduced. By setting a limit hole that connects the inner cavity of the supercharger cylinder with the outside world, it can not only be used to monitor the position of the supercharger piston rod in the supercharger cylinder to prevent the low-pressure end 82 of the supercharger piston rod from failing to work normally due to running to the end of the low-pressure cavity; at the same time, when the supercharger piston rod compresses the internal gas and generates resistance due to movement, it can also be used as an exhaust hole to balance the pressure difference; lubricating oil can also be injected into the supercharger cylinder through the limit hole to reduce the resistance generated when the supercharger piston rod moves. In addition, when the supercharger piston rod moves to the low-pressure end 82 against the variable cross-section, liquid or oil can be injected into the set oil inlet hole to prevent the liquid or oil in the high-pressure cavity in the supercharger cylinder from being exhausted, affecting the subsequent experiments.

[0049] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A hydraulic booster device for preventing dynamic impact, characterized in that: include: A supercharger cylinder, a high-pressure end cover plate connected to one end of the supercharger cylinder, a low-pressure end cover plate connected to the other end of the supercharger cylinder, and a supercharger piston rod movably arranged in the supercharger cylinder; the supercharger cylinder includes a cylinder wall, an inner cavity embedded in the cylinder wall, a limiting hole connecting the inner cavity with the outside world, and an oil inlet hole connecting the inner cavity with the outside world; the supercharger piston rod moves in the inner cavity of the supercharger cylinder.

2. The hydraulic booster device for preventing dynamic impact according to claim 1, characterized in that: The inner cavity of the supercharger cylinder comprises a low-pressure cavity close to the low-pressure end cover plate and a high-pressure cavity communicated with the low-pressure cavity.

3. The hydraulic booster device for preventing dynamic impact according to claim 2, characterized in that: The booster piston rod comprises a low-pressure end with one end close to the low-pressure end cover plate and a high-pressure end connected to the other end of the low-pressure end.

4. The hydraulic booster device for preventing dynamic impact according to claim 3, characterized in that: The cross-sectional area of ​​the high-pressure end=the cross-sectional area of ​​the high-pressure cavity<the cross-sectional area of ​​the low-pressure end=the cross-sectional area of ​​the low-pressure cavity.

5. The hydraulic booster device for preventing dynamic impact according to claim 3, characterized in that: A plurality of buffers are evenly arranged in an annular direction on the cross section of the low-pressure end connected to the high-pressure end; the number of the buffers is not less than three.

6. The hydraulic booster device for preventing dynamic impact according to claim 5, characterized in that: The buffer includes one or more of a spring and a rubber ball.

7. The hydraulic booster device for preventing dynamic impact according to claim 2, characterized in that: The limiting hole is arranged on the low-pressure cavity at one end close to the high-pressure cavity; the oil inlet hole is arranged on the high-pressure cavity at one end away from the low-pressure cavity.

8. The hydraulic booster device for preventing dynamic impact according to claim 1, characterized in that: The high-pressure end cover plate is provided with a high-pressure liquid joint; the low-pressure end cover plate is provided with a low-pressure liquid joint.

9. The hydraulic booster device for preventing dynamic impact according to claim 1, characterized in that: The high-pressure end cover plate is connected to one end of the supercharger cylinder barrel through a plurality of high-pressure end fastening nuts; the low-pressure end cover plate is connected to the other end of the supercharger cylinder barrel through a plurality of low-pressure end fastening nuts.

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