Oil cylinder pressure regulating device

Abstract

The utility model discloses an oil cylinder pressure regulating device which relates to the technical field of hydraulic oil cylinders and comprises a valve body, a threaded head is fixedly arranged at the right end of the outer surface of the valve body, a bolt is in threaded connection with the left side of the surface of the threaded head, and a hand wheel sleeve is in threaded connection with the right side of the surface of the threaded head. A positioning rod is fixedly installed in the middle of the inner surface of the hand wheel sleeve, a spring is fixedly installed on the inner surface of the hand wheel sleeve and arranged on the outer side of the positioning rod in a sleeving mode, and an inwards-concave valve element is fixedly arranged at the left end of the silicon carbide and arranged in the valve body in a sliding mode. And a positioning rod is also fixedly mounted at the right end of the concave valve core in the spring. Compared with an existing common oil cylinder pressure adjusting device, the oil cylinder pressure adjusting device has the advantages that the pressure of the oil cylinder is effectively and flexibly adjusted, meanwhile, the bolt rotates at the threaded head, the position of the bolt is changed, the position of the maximum compression variable of the hand wheel sleeve can be limited, excessive extrusion to the spring is avoided, and therefore the pressure adjusting accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to an oil cylinder pressure regulating device. Background Art

[0002] A hydraulic cylinder is a linear motion actuator whose output force is proportional to the effective piston area and the pressure differential across it. Its function is to convert hydraulic energy into mechanical energy. The input is fluid flow and pressure, and the output is linear velocity and force.

[0003] For example, the public document with application number 202120631103.3 discloses an automatic balancing pressure regulating valve for an oil cylinder. This utility model synchronizes the lifting actions of two oil cylinders in a single hydraulic oil circuit system, and can assist the hydraulic rod in the oil cylinder to quickly adjust the oil pressure in the oil inlet chamber and the oil outlet chamber, so that the oil pressure in the oil inlet chamber and the oil outlet chamber of the series oil cylinder is balanced, and it is convenient for internal circulation and cleaning. The lifting action synchronization effect is good and the lifting efficiency is high. However, the oil cylinder pressure regulating device adopts automatic pressure regulation, which makes it difficult to adjust the hydraulic output pressure of the oil cylinder according to the specific needs of use at the time. When in use, the pressure output is relatively constant, the scope of application is limited, and the practicality is poor.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and an oil cylinder pressure regulating device is proposed. Utility Model Content

[0005] The purpose of the present utility model is to provide an oil cylinder pressure regulating device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cylinder pressure regulating device, comprising a valve body, a threaded head fixedly provided on the right end of the outer surface of the valve body, a bolt threadedly connected to the left side of the surface of the threaded head, a handwheel sleeve threadedly connected to the right side of the surface of the threaded head, a positioning rod fixedly installed on the middle part of the inner surface of the handwheel sleeve, a spring fixedly installed on the inner surface of the handwheel sleeve on the outside of the positioning rod, and an inwardly concave valve core fixedly provided on the left end of the spring.

[0007] Preferably, the concave valve core is slidably arranged inside the valve body, and the right end of the concave valve core is located inside the spring and a positioning rod is also fixedly installed thereon.

[0008] Preferably, an oil inlet is opened on the left side below the surface of the valve body, and a pressure relief port is opened on the right side of the oil inlet below the outer surface of the valve body.

[0009] Preferably, a reflux passage is opened in the middle above the inner surface of the valve body, the inner surface of the valve body is located on the right side of the concave valve core and is set as a constant pressure chamber, and the right end opening of the reflux passage is connected to the constant pressure chamber.

[0010] Preferably, the concave valve core separates the left end of the constant pressure chamber from the oil inlet, and the surface of the concave valve core blocks the left end openings of the pressure relief port and the reflux passage respectively.

[0011] Preferably, a back-pressure sealing head is slidably provided on the inner surface of the valve body at the left end of the concave valve core, and a plug is fixedly installed on the left end of the inner surface of the valve body.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This utility model effectively and flexibly adjusts the pressure of the oil cylinder through the arrangement of the threaded head, bolt, handwheel sleeve, positioning rod and spring. At the same time, the bolt rotates at the threaded head to change its position, which can limit the position of the maximum compression variable of the handwheel sleeve, avoiding excessive compression of the spring, thereby improving the accuracy of pressure regulation;

[0014] 2. The utility model avoids the instantaneous hydraulic pressure from pushing the concave valve core to move quickly and the excessive impact from causing the spring pressure-limiting variable to fail through the arrangement of the oil inlet, pressure relief port, reflux passage and constant pressure chamber, so that the movement of the concave valve core is more linear. The current pressure displacement variable of the entire concave valve core can also be kept constant, so that the oil intake of the entire cylinder is more stable and uniform when oil is introduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall front view and cross-sectional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the disassembly structure of the bolt and hand wheel sleeve of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the valve body of the utility model.

[0019] In the figure: 1. Valve body; 2. Threaded head; 3. Bolt; 4. Handwheel sleeve; 5. Positioning rod; 6. Spring; 7. Concave valve core; 8. Oil inlet; 9. Pressure relief port; 10. Return flow path; 11. Constant pressure chamber; 12. Back pressure sealing head; 13. Plug. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1-4 As shown, a cylinder pressure regulating device includes a valve body 1, a threaded head 2 is fixedly provided on the right end of the outer surface of the valve body 1, a bolt 3 is threadedly connected to the left side of the surface of the threaded head 2, a handwheel sleeve 4 is threadedly connected to the right side of the surface of the threaded head 2, a positioning rod 5 is fixedly installed in the middle of the inner surface of the handwheel sleeve 4, a spring 6 is fixedly installed on the inner surface of the handwheel sleeve 4 on the outside of the positioning rod 5, and an inner concave valve core 7 is fixedly provided on the left end of the spring 6.

[0022] By adopting the above technical solution, the position of the bolt 3 and the handwheel sleeve 4 can be adjusted by screwing on the threaded head 2. The position of the bolt 3 can be adjusted by screwing to limit the maximum left movement of the handwheel sleeve 4, thereby achieving a limiting effect. The left movement of the handwheel sleeve 4 can squeeze the spring 6, thereby increasing the pushing pressure of the spring 6 on the concave valve core 7 to the left, thereby changing the pressure degree of the concave valve core 7.

[0023] Furthermore, the concave valve core 7 is slidably arranged inside the valve body 1 , and the right end of the concave valve core 7 is located inside the spring 6 and a positioning rod 5 is also fixedly installed thereon.

[0024] By adopting the above technical solution, the positioning rod 5 prevents the spring 6 from being compressed and deflected.

[0025] Furthermore, an oil inlet 8 is opened on the left side below the surface of the valve body 1 , and a pressure relief port 9 is opened on the right side of the oil inlet 8 below the outer surface of the valve body 1 .

[0026] By adopting the above technical solution, the oil inlet 8 is used to fill the hydraulic oil, and the pressure relief port 9 can discharge part of the hydraulic oil.

[0027] Furthermore, a reflux passage 10 is opened in the middle above the inner surface of the valve body 1, and the cavity on the right side of the inner surface of the valve body 1 and the concave valve core 7 is set as a constant pressure chamber 11, and the right end opening of the reflux passage 10 is connected to the constant pressure chamber 11.

[0028] By adopting the above technical solution, a portion of the hydraulic oil will also enter the constant pressure chamber 11 through the reflux passage 10, thereby forming a hydraulic oil chamber with equal hydraulic pressure on the right side of the concave valve core 7, thereby keeping the current pressure displacement variable of the entire concave valve core 7 constant.

[0029] Furthermore, the concave valve core 7 separates the left end of the constant pressure chamber 11 from the oil inlet 8 , and the surface of the concave valve core 7 blocks the left end openings of the pressure relief port 9 and the reflux passage 10 , respectively.

[0030] By adopting the above technical solution, the hydraulic oil will open the pressure relief port 9 and the reflux passage 10 only after ensuring that the concave valve core 7 is subjected to sufficient hydraulic pressure, thereby avoiding the situation where the hydraulic oil flows out through the pressure relief port 9 when the concave valve core 7 is not subjected to force; the hydraulic oil is continuously filled, which will push the concave valve core 7 to move to the right, thereby opening the pressure relief port 9 and the left end opening of the reflux passage 10, and the pressure relief port 9 can discharge excess hydraulic oil, thereby avoiding the instantaneous hydraulic pressure that pushes the concave valve core 7 to move quickly, and the excessive impact causes the failure of the pressure limiting variable of the spring 6, making the movement of the concave valve core 7 more linear.

[0031] Furthermore, a back pressure sealing head 12 is slidably provided on the inner surface of the valve body 1 at the left end of the concave valve core 7 , and a plug 13 is fixedly installed on the left end of the inner surface of the valve body 1 .

[0032] By adopting the above technical solution, the back-pressure sealing head 12 will slide slightly to the left due to the hydraulic pressure at the moment when the hydraulic oil enters, which has a certain buffering effect and avoids the instantaneous pressurization of the hydraulic oil. The pressure is completely borne by the right concave valve core 7.

[0033] Working principle: When using the oil cylinder pressure regulating device, first, turn the bolt 3 according to the pressure demand, adjust the limit position of the bolt 3, and then turn the handwheel sleeve 4 so that the left end of the handwheel sleeve 4 is close to the bolt 3, and the handwheel sleeve 4 moves to the left of the threaded head 2, thereby squeezing the spring 6, so that the left end of the spring 6 is gradually compressed under the limit of the concave valve core 7, thereby increasing its own compression variable, so that the pushing force of the spring 6 to the left is increased, and then the concave valve core 7 needs greater pressure to move to the right, and the oil cylinder pressure is adjusted. Then, hydraulic oil is injected through the oil inlet 8. The hydraulic oil is continuously filled, which will push the concave valve core 7 to move to the right, thereby Open the pressure relief port 9 and the left end opening of the reflux passage 10. The pressure relief port 9 can discharge excess hydraulic oil to avoid the instantaneous hydraulic pressure pushing the concave valve core 7 to move quickly. Excessive impact causes the failure of the pressure limiting variable of the spring 6, making the movement of the concave valve core 7 more linear. At the same time, another part of the hydraulic oil will enter the constant pressure chamber 11 through the reflux passage 10, thereby forming a hydraulic oil chamber with equal hydraulic pressure on the right side of the concave valve core 7, thereby keeping the current pressure displacement variable of the entire concave valve core 7 constant, so that the oil intake of the entire cylinder is more stable and uniform. This is the working principle of the cylinder pressure regulating device.

Claims

1. A cylinder pressure regulating device, comprising a valve body (1), characterized in that: A threaded head (2) is fixedly provided at the right end of the outer surface of the valve body (1); a bolt (3) is threadedly connected to the left side of the surface of the threaded head (2); a handwheel sleeve (4) is threadedly connected to the right side of the surface of the threaded head (2); a positioning rod (5) is fixedly installed in the middle of the inner surface of the handwheel sleeve (4); a spring (6) is fixedly installed on the inner surface of the handwheel sleeve (4) and sleeved on the outside of the positioning rod (5); and an inner concave valve core (7) is fixedly provided at the left end of the spring (6).

2. The oil cylinder pressure regulating device according to claim 1, characterized in that: The concave valve core (7) is slidably arranged inside the valve body (1), and the right end of the concave valve core (7) is located inside the spring (6) and is also fixedly mounted with a positioning rod (5).

3. The oil cylinder pressure regulating device according to claim 1, characterized in that: An oil inlet (8) is provided on the left side below the surface of the valve body (1), and a pressure relief port (9) is provided on the right side of the oil inlet (8) below the outer surface of the valve body (1).

4. The oil cylinder pressure regulating device according to claim 1, characterized in that: A reflux passage (10) is provided in the middle of the upper inner surface of the valve body (1); the inner surface of the valve body (1) is provided with a cavity on the right side of the concave valve core (7) as a constant pressure chamber (11); the right end opening of the reflux passage (10) is connected to the constant pressure chamber (11).

5. The oil cylinder pressure regulating device according to claim 1, characterized in that: The concave valve core (7) separates the left end of the constant pressure chamber (11) from the oil inlet (8), and the surface of the concave valve core (7) respectively blocks the left end openings of the pressure relief port (9) and the reflux passage (10).

6. The oil cylinder pressure regulating device according to claim 1, characterized in that: A back pressure sealing head (12) is slidably provided on the inner surface of the valve body (1) at the left end of the concave valve core (7), and a plug (13) is fixedly installed on the left end of the inner surface of the valve body (1).

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