Oil cylinder and energy accumulator integrated high-pressure device

Abstract

The utility model discloses a high-pressure device integrating an oil cylinder and an energy accumulator. The high-pressure device comprises a frame body, the energy accumulator is installed on the frame body and comprises a shell, a containing cavity is formed in the shell, and a diaphragm is arranged in the containing cavity to divide the containing cavity into a hydraulic oil end and a compressed air end; one end of the first mounting cylinder is fixed with the shell in a sealing manner and is communicated with the hydraulic oil end; the oil cylinder is positioned in the first mounting cylinder and is in sealed sliding connection with the first mounting cylinder; the frame body is used for installing the energy accumulator and the oil cylinder, the energy accumulator is communicated with the oil cylinder through the first installation cylinder, the energy accumulator is used for providing buffering for the oil cylinder, and when pressure borne by a sample of the device fluctuates, the energy accumulator can reduce pressure or supplement pressure so as to keep the pressure borne by the sample stable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of press, specifically is a high pressure device of oil cylinder and energy accumulator integration. BACKGROUND

[0002] High pressure equipment in the use process, may cause the pressure to produce certain fluctuation because of sample, high pressure equipment often cooperates heating equipment to use, because of temperature change, will lead to thermal expansion, also can make pressure fluctuate. Therefore when the pressure appears fluctuation, need to carry out pressure compensation or pressure reduction to pressure, usually use hydraulic system to adjust, when the conventional hydraulic system carries out compensation through external oil pump, pipeline system exists pressure transmission delay, cannot compensate in real time, this kind of adjustment is very lagging behind relative to internal pressure.

[0003] In the related document, a kind of piston cylinder type ultrahigh temperature high pressure device and its use method are disclosed, including upper bottom plate, lower bottom plate and the upper oil cylinder, lower oil cylinder, upper piston, lower piston, transformer, pressure sensor, heating component, upper piston seat and the pressure cavity for containing sample etc. being set between the upper bottom plate and lower bottom plate;The upper bottom plate and lower bottom plate are horizontally arranged and are connected by a plurality of pull rods.

[0004] This kind of ultrahigh temperature high pressure device needs to carry out compensation by external oil pump when pressure appears fluctuation, and pressure transmission is slow. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of high pressure device of oil cylinder and energy accumulator integration to solve at least one of the above technical problems.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0007] A kind of high pressure device of oil cylinder and energy accumulator integration, comprising:

[0008] Frame body;

[0009] Energy accumulator mounted on the frame body, which includes a housing, a containing cavity is formed in the housing, a diaphragm is provided in the containing cavity to divide the containing cavity into a hydraulic oil end and a compressed air end;

[0010] First installation cylinder, one end of which is sealingly fixed with the housing and communicates with the hydraulic oil end;

[0011] Oil cylinder, located in the first installation cylinder and sealingly slidingly connected with the first installation cylinder.

[0012] This invention uses a frame to mount an accumulator and a hydraulic cylinder. A first mounting cylinder connects the accumulator to the hydraulic cylinder, providing a buffer for the cylinder. When the pressure on the sample fluctuates, the accumulator can reduce or replenish the pressure to maintain stability. The first mounting cylinder is connected to the hydraulic oil end of the accumulator. A diaphragm separates the hydraulic oil end from the compressed air end, allowing the pressure in the compressed air end to be quickly synchronized to the first mounting cylinder. The hydraulic cylinder is slidably sealed within the first mounting cylinder, thus synchronizing the pressure from the compressed air end to the cylinder. The accumulator provides a buffer for the cylinder, enabling the device to reduce or replenish pressure. Pressure is replenished to compensate for pressure. For example, when a sample expands due to heat, the pressure from the hydraulic cylinder exceeds the set pressure, while the pressure at the compressed air end is the set pressure. The hydraulic cylinder is then pushed by the sample and moves downwards away from the sample. The pressure is transmitted to the compressed air end through the hydraulic oil end and the diaphragm, causing the pressure at the compressed air end to rise. At this time, the compressed air end can depressurize, so that the pressure on both the compressed air end and the sample is reduced to the set pressure. Another example is when the sample melts, the pressure from the hydraulic cylinder on the sample becomes less than the set pressure, while the pressure at the compressed air end is greater than the pressure from the hydraulic cylinder on the sample. This can push the hydraulic cylinder toward the sample, thus replenishing the pressure on the sample.

[0013] Specifically, the frame includes an upper base plate and a lower base plate, which are fixedly connected by multiple vertically arranged tie rods. The two ends of the tie rods pass through the upper base plate and the lower base plate respectively, and are fixedly connected to the upper base plate and the lower base plate by nuts. The housing is installed on the lower base plate. The tie rods are used to fix the upper base plate and the lower base plate. The lower base plate is used to install the hydraulic cylinder. The upper base plate can be used to bear pressure. For example, the hydraulic cylinder presses the sample against the upper base plate, which can apply a high-pressure environment to the sample.

[0014] Furthermore, the housing and the first mounting cylinder are integrally formed, which increases the connection strength and sealing between the housing and the first mounting cylinder.

[0015] Furthermore, the compressed air end is connected to an air pump, which is used to regulate the pressure of the compressed air end.

[0016] Furthermore, the cylinder is equipped with an upwardly extending piston rod, which is used to drive the piston rod to rise and fall, thereby applying pressure to the sample.

[0017] Furthermore, a pressure plate is provided at the top of the piston rod. The pressure plate can be used to place samples, disperse the pressure from the piston rod, and protect the piston rod.

[0018] Furthermore, a piston is fixed to the bottom end of the cylinder, and the piston is slidably connected to the inner wall of the first mounting cylinder to achieve a slidably connected cylinder. The outer diameter of the piston is larger than the outer diameter of the cylinder, which can prevent the cylinder from contacting the inner wall of the first mounting cylinder and prevent the cylinder from scratching the inner wall of the first mounting cylinder, thereby damaging the sealing of the connection between the piston and the inner wall of the first mounting cylinder.

[0019] Furthermore, a second mounting cylinder is coaxially fixed inside the first mounting cylinder. The second mounting cylinder is slidably connected to the hydraulic cylinder. The second mounting cylinder is used to guide the movement of the hydraulic cylinder and ensure the smoothness of the hydraulic cylinder movement.

[0020] Furthermore, the inner diameter of the second mounting cylinder is smaller than the outer diameter of the piston, and the movement range of the piston can also be limited by the second mounting cylinder.

[0021] Furthermore, the first mounting cylinder includes an upper section and a lower section, the inner diameter of the upper section is larger than the inner diameter of the lower section, and the second mounting cylinder is installed on the upper section. The upper section is used to install the second mounting cylinder, and the inner diameter of the upper section is larger than the inner diameter of the lower section, which facilitates the installation of the second mounting cylinder.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This utility model uses a frame to install an accumulator and a hydraulic cylinder. The accumulator is connected to the hydraulic cylinder through a first mounting cylinder. The accumulator provides a buffer for the hydraulic cylinder. When the pressure on the sample of this device fluctuates, the accumulator can reduce or replenish the pressure to keep the pressure on the sample stable. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a high-pressure device integrating a hydraulic cylinder and an accumulator in this embodiment;

[0025] Figure 2 This is a cross-sectional view of the accumulator and the first mounting cylinder in this embodiment;

[0026] In the diagram: 1. Frame; 101. Upper base plate; 102. Lower base plate; 103. Tie rod; 2. Accumulator; 201. Housing; 202. Hydraulic oil end; 203. Compressed air end; 3. First mounting cylinder; 4. Oil cylinder; 5. Air pump; 6. Piston rod; 7. Pressure plate; 8. Piston; 9. Second mounting cylinder. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] like Figure 1 and Figure 2 As shown, this embodiment provides a high-voltage device integrating a hydraulic cylinder 4 and an accumulator 2, including: a frame 1, an accumulator 2, a first mounting cylinder 3, and a hydraulic cylinder 4.

[0029] The accumulator 2 is a diaphragm accumulator 2, which is installed on the frame 1 and includes a housing 201. A receiving cavity is formed inside the housing 201. A diaphragm is provided in the receiving cavity to divide the receiving cavity into a hydraulic oil end 202 and a compressed air end 203. In this embodiment, the hydraulic oil end 202 is located above the compressed air end 203. In this embodiment, the hydraulic oil end 202 is filled with hydraulic oil, and the compressed air end 203 contains compressed air. The compressed air end 203 is connected to an air pump 5.

[0030] The first mounting cylinder 3 has one end sealed and fixed to the housing 201 and connected to the hydraulic oil end 202. Specifically, the first mounting cylinder 3 is vertically arranged and sealed and fixedly connected to the top surface of the housing 201. A channel is provided on the top of the housing 201 to connect the hydraulic oil end 202 to the inside of the first mounting cylinder 3. For example, this channel can be coaxially arranged with the first mounting cylinder 3.

[0031] To ensure structural strength and sealing of the connection between the first mounting cylinder 3 and the housing 201, in this embodiment, the housing 201 and the first mounting cylinder 3 are integrally formed.

[0032] The hydraulic cylinder 4 is located inside the first mounting cylinder 3 and is slidably connected to the first mounting cylinder 3. The hydraulic cylinder 4 is provided with an upwardly extending piston rod 6. In this embodiment, the hydraulic cylinder 4 can be connected to an external hydraulic station to drive the piston rod 6 to apply pressure to the sample.

[0033] Furthermore, a pressure plate 7 is provided at the top of the piston rod 6, and the piston rod 6 and the pressure plate 7 are fixed coaxially.

[0034] In order to achieve a sliding connection between the hydraulic cylinder 4 and the first mounting cylinder 3 and to ensure the sealing of the connection between the hydraulic cylinder 4 and the first mounting cylinder 3, a piston 8 is fixed at the bottom of the hydraulic cylinder 4. The piston 8 is in a sealed sliding connection with the inner wall of the first mounting cylinder 3 to achieve a sealed sliding connection between the hydraulic cylinder 4 and the first mounting cylinder 3. The outer diameter of the piston 8 is larger than the outer diameter of the hydraulic cylinder 4.

[0035] In order to make the movement of the hydraulic cylinder 4 more stable, a second mounting cylinder 9 is coaxially fixed inside the first mounting cylinder 3. The second mounting cylinder 9 is slidably connected to the hydraulic cylinder 4. Specifically, the first mounting cylinder 3, the second mounting cylinder 9, the hydraulic cylinder 4 and the piston 8 are coaxially arranged, and the piston 8 and the hydraulic cylinder 4 can slide up and down inside the first mounting cylinder 3.

[0036] To limit the range of motion of the cylinder 4 and piston 8, the inner diameter of the second mounting cylinder 9 is smaller than the outer diameter of the piston 8. When the piston 8 moves upward to the bottom of the second mounting cylinder 9 and abuts against the bottom of the second mounting cylinder 9, the piston 8 will be blocked by the second mounting cylinder 9. The channel for connecting the hydraulic oil end 202 with the first mounting cylinder 3 can be a round hole. The diameter of this round hole is smaller than the outer diameter of the piston 8. When the piston 8 moves downward until it abuts against the housing 201, the piston 8 can no longer move downward and will be blocked by the housing 201.

[0037] To facilitate the installation of the second mounting cylinder 9 onto the first mounting cylinder 3, the first mounting cylinder 3 includes an upper section and a lower section. The inner diameter of the upper section is larger than that of the lower section. The second mounting cylinder 9 is installed on the upper section. With this arrangement, when the second mounting cylinder 9 is placed into the upper section, it will fall to the top of the lower section. The second mounting cylinder 9 can be fixedly connected to the first mounting cylinder 3 by welding or by bolts.

[0038] In this embodiment, the outer diameter of the cylinder 4 is smaller than the inner diameter of the first mounting cylinder 3. The first mounting cylinder 3 has enough space to accommodate the pipeline connecting the cylinder 4 and the hydraulic station. The inner wall of the second mounting cylinder 9 can be provided with a receiving groove to accommodate the pipeline connecting the cylinder 4 and the hydraulic station. The receiving groove can be provided vertically on the inner wall of the second mounting cylinder 9. Preferably, the interface connecting the cylinder 4 and the hydraulic station can also be provided at the top of the cylinder 4.

[0039] In order to limit the rotation of the hydraulic cylinder 4 along its axial direction, in this embodiment, a vertical guide groove can be opened on the inner wall of the second mounting cylinder 9, and a guide strip corresponding to the guide groove can be fixed on the hydraulic cylinder 4 to limit the rotation of the hydraulic cylinder 4.

[0040] Specifically, the frame 1 includes an upper base plate 101 and a lower base plate 102. The upper base plate 101 and the lower base plate 102 are fixedly connected by multiple vertically arranged tie rods 103. The two ends of the tie rods 103 pass through the upper base plate 101 and the lower base plate 102 respectively, and are fixedly connected to the upper base plate 101 and the lower base plate 102 by nuts. The shell 201 is installed on the lower base plate 102. Specifically, the shell 201 can be fixed to the upper surface of the lower base plate 102 by welding or by bolts.

[0041] Working principle:

[0042] When using this device, the accumulator 2 can be activated, and the air pump 5 can be used to pressurize the compressed air end 203, so that both the compressed air end 203 and the hydraulic oil end 202 reach the set pressure. At the same time, the oil cylinder 4 is connected to the external hydraulic station, and the hydraulic station provides power to the oil cylinder 4, so that the oil cylinder 4 applies the set pressure to the sample. When the pressure of the compressed air end 203 and the pressure applied to the sample by the oil cylinder 4 both reach the set pressure, the position of the piston 8 is determined. The position of the piston 8 needs to be between the housing 201 and the second mounting cylinder 9 so that the piston 8 can move up and down to reduce or replenish pressure. The position of the piston 8 can be determined by observing the position of the oil cylinder 4.

[0043] When it is necessary to adjust the piston 8 to move downward, the pressure of the compressed air end 203 can be appropriately reduced to make the oil cylinder 4 move downward. At this time, the pressure applied to the sample by the oil cylinder 4 will also decrease accordingly. After the piston 8 moves to the appropriate position, the pressure of the compressed air end 203 can be slowly increased. At the same time, the hydraulic station is used to apply pressure to the sample synchronously so that the pressure on the upper and lower ends of the piston 8 tends to be balanced until both reach the set pressure.

[0044] When it is necessary to adjust the upward movement of piston 8, the hydraulic oil in cylinder 4 can be pumped back to the hydraulic station to reduce the pressure on the upper end of piston 8, causing cylinder 4 to move upward. When cylinder 4 moves upward, the hydraulic oil in hydraulic oil end 202 will enter the first mounting cylinder 3, reducing the pressure in compressed air end 203. Therefore, at this time, it is also necessary to maintain the pressure in compressed air end 203 at the set pressure through air pump 5. When cylinder 4 moves upward, the pressure of cylinder 4 on the sample may be maintained at the set pressure or slightly lower than the set pressure. When piston 8 moves to the appropriate position, the connection between cylinder 4 and hydraulic station can be closed to prevent the hydraulic oil in cylinder 4 from flowing out. At the same time, air pump 5 is used to transmit the pressure in compressed air end 203 to cylinder 4, pushing cylinder 4 upward, so that the sample can reach the set pressure.

[0045] When the pressure on the compressed air end 203 and the sample reaches the set value, the connection between the oil cylinder 4 and the hydraulic station can be cut off, so that the hydraulic oil in the oil cylinder 4 will no longer flow out.

[0046] When the pressure on the sample fluctuates, the pressure on the sample is consistent with the pressure on the top of the piston 8. The pressure can be reduced or replenished by the accumulator 2 to keep the pressure on the sample stable.

[0047] For example, when the pressure on the sample decreases, the pressure on the top of the piston 8 decreases, and the pressure on the bottom of the piston 8 is greater than the pressure on the top of the piston 8. The hydraulic oil at the bottom of the piston 8 pushes the piston 8 upward to increase the pressure on the sample and achieve pressure compensation.

[0048] When the pressure on the sample increases, the pressure on the top of piston 8 increases, while the pressure on the bottom of piston 8 is less than the pressure on the top of piston 8. Piston 8 squeezes the hydraulic oil downward. During the downward squeezing process of piston 8, the distance between the sample and piston 8 increases, and the pressure of the sample on piston 8 gradually decreases until the pressure of piston 8 reaches the set value. The pressure at both ends of piston 8 is consistent. The pressure at the compressed air end 203 is adjusted by the air pump 5.

[0049] It should be noted that although the present invention has been disclosed above with specific embodiments, the above embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A high-pressure device integrating a hydraulic cylinder and an accumulator, characterized in that, include: Frame; The accumulator installed on the frame includes a housing, a receiving cavity is formed inside the housing, and a diaphragm is provided inside the receiving cavity to divide the receiving cavity into a hydraulic oil end and a compressed air end. The first mounting cylinder has one end sealed and fixed to the housing and connected to the hydraulic oil end; The hydraulic cylinder is located inside the first mounting cylinder and is in a sealed sliding connection with the first mounting cylinder.

2. The high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 1, characterized in that, The frame includes an upper base plate and a lower base plate. The upper base plate and the lower base plate are fixedly connected by multiple vertically arranged tie rods. The two ends of the tie rods pass through the upper base plate and the lower base plate respectively, and are fixedly connected to the upper base plate and the lower base plate by nuts. The shell is installed on the lower base plate.

3. The high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 1, characterized in that, The housing is integrally formed with the first mounting cylinder.

4. The high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 1, characterized in that, The compressed air end is connected to an air pump.

5. A high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 1, characterized in that, The hydraulic cylinder is equipped with an upward-extending piston rod.

6. A high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 5, characterized in that, A pressure plate is provided at the top of the piston rod.

7. A high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 1, characterized in that, A piston is fixed at the bottom of the hydraulic cylinder. The piston is slidably connected to the inner wall of the first mounting cylinder to achieve a slidably connected hydraulic cylinder to the first mounting cylinder. The outer diameter of the piston is larger than the outer diameter of the hydraulic cylinder.

8. A high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 7, characterized in that, A second mounting cylinder is coaxially fixed inside the first mounting cylinder, and the second mounting cylinder is slidably connected to the oil cylinder.

9. A high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 8, characterized in that, The inner diameter of the second mounting cylinder is smaller than the outer diameter of the piston.

10. A high-pressure device integrating a hydraulic cylinder and an accumulator as described in claim 8, characterized in that, The first mounting cylinder includes an upper section and a lower section, the inner diameter of the upper section is larger than the inner diameter of the lower section, and the second mounting cylinder is mounted on the upper section.

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