High-sealing leakage-proof oil cylinder for geological exploration

Abstract

The utility model provides a high-sealing leakproof oil cylinder for geological exploration, which comprises an oil tank and a cylinder barrel, a rear end cover is arranged between the cylinder barrel and the side wall of the oil tank, a top cover is arranged at the top of the oil tank, the top cover is fixedly connected with the oil tank through bolts, and an oil plug is arranged at the bottom of the left side wall of the oil tank; a piston assembly is arranged in the cylinder barrel and comprises a piston rod and a piston, the piston is arranged at the end, close to the rear end cover, of the piston rod, and the piston and the piston rod are fixedly connected. An oil return opening is formed in the center of the rear end cover and communicated with the interior of the oil tank, a pressure-resistant oil pipe is arranged at the upper end of the cylinder barrel, one end of the pressure-resistant oil pipe is communicated with the interior of the front end of the cylinder barrel, and the other end of the pressure-resistant oil pipe is communicated with the interior of the oil tank. A buffering device is arranged between the piston and the rear end cover and can buffer the piston and the piston rod, and the problem that the oil cylinder is damaged due to the fact that the internal pressure of the oil cylinder is too large is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to a high-sealing and leak-proof oil cylinder for geological exploration. Background Art

[0002] The oil cylinder is a hydraulic cylinder. The hydraulic cylinder is a linear motion actuator whose output force is proportional to the effective area of ​​the piston and the pressure difference on both sides. Its function is to convert hydraulic energy into mechanical energy. The input of the hydraulic cylinder is the flow rate and pressure of the fluid, and the output is the linear motion speed and force. The hydraulic cylinder is an energy conversion device that converts hydraulic energy into mechanical energy of reciprocating linear motion. The hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device.

[0003] The existing Chinese patent document CN201921117437.8 discloses a seismic zone exploration drilling rig cylinder, including a cylinder body, a fuel tank, and a gear pump. The fuel tank is arranged on one side of the fuel cylinder. A bidirectional gear pump is arranged in the fuel tank. The bidirectional gear pump is connected to the motor through a coupling. The gear pump is connected to an integrated valve through a hose. The integrated valve is connected to the fuel cylinder through an oil pipe. There are two oil pipe interfaces on the fuel cylinder, and the two oil pipe interfaces are respectively located at both ends of the fuel cylinder; a piston rod and a piston are arranged inside the fuel cylinder, and the piston is located between the two oil pipe interfaces. A piston rod lifting ring is arranged on the piston rod, and the piston rod lifting ring is connected to the drilling rig through a cross bar. The integrated valve includes a hydraulically controlled one-way valve, a reversing valve, a speed regulating valve, a pressure limiting valve and a relief valve. The valve bodies are all connected to the integrated valve block by welding. The device has the advantages of stable oil pressure and timely pressure relief.

[0004] However, the above patent has certain defects when in use. Since some rock layers in geological exploration are relatively hard, the internal bearing pressure will suddenly increase. In the absence of a buffer device inside the device, it is easy to cause damage to the internal piston rod, and even damage to the inside of the cylinder, resulting in leakage and damage.

[0005] For this reason, a high-sealing and leak-proof oil cylinder for geological exploration is proposed to solve the above-mentioned problems. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a high-sealing and leak-proof oil cylinder for geological exploration.

[0007] The utility model is implemented by the following technical solutions:

[0008] A high-sealing and leak-proof oil cylinder for geological exploration, comprising an oil tank and a cylinder barrel, a rear end cover is arranged between the cylinder barrel and the side wall of the oil tank, the rear end cover of the cylinder barrel is fixedly connected to the side wall of the oil tank, a top cover is arranged on the top of the oil tank, the top cover is fixedly connected to the oil tank by bolts, and an oil plug is arranged at the bottom of the left side wall of the oil tank; a piston assembly is arranged inside the cylinder barrel, the piston assembly comprises a piston rod and a piston, the piston is arranged at one end of the piston rod close to the rear end cover, and the piston and the piston rod are fixedly connected;

[0009] The rear end cover is provided with an oil return port at the center thereof, the oil return port is connected to the inside of the oil tank, the upper end of the cylinder is provided with a pressure-resistant oil pipe, one end of the pressure-resistant oil pipe is connected to the inside of the front end of the cylinder, and the other end is connected to the inside of the oil tank;

[0010] A buffer device is arranged between the piston and the rear end cover.

[0011] The buffer device comprises a buffer plate, a spring and a buffer block, wherein the buffer plate is arranged on the left side of the piston, the spring is arranged on the left side of the buffer plate, the buffer block is fixed on the right side wall of the rear end cover, one end of the spring is fixed on the side wall of the buffer block, and the other end is fixed on the side wall of the buffer plate;

[0012] An oil passage is arranged at the center of the buffer plate.

[0013] Through the above technical solution, the buffer device can buffer the piston and the piston rod, effectively avoiding the problem of excessive pressure inside the oil cylinder, which may cause damage to the oil cylinder.

[0014] An earring is arranged at one end of the piston rod away from the rear end cover. The earring is connected to the piston rod as a whole, and a bearing is arranged inside the earring.

[0015] Through the above technical solution, the earring arrangement facilitates the connection between the oil cylinder and the external device, and is easy to disassemble and install.

[0016] A sealing ring is provided on the outer peripheral wall of the piston, and a sealing ring is provided on the outer peripheral wall of the buffer plate;

[0017] A guide sleeve is provided at one end of the piston rod close to the earring, and the guide sleeve is sleeved on the piston rod.

[0018] Through the above technical solution, the provision of the sealing ring and the sealing ring enhances the sealing performance between the piston and the buffer plate and the cylinder.

[0019] A dust cover is sleeved on one end of the piston rod close to the earring and the cylinder barrel, and the dust cover can be extended and retracted.

[0020] Through the above technical solution, the part of the piston rod protruding from the cylinder is protected by a dust cover, and the dust cover can follow the extension and retraction of the piston rod, thereby effectively preventing dust from contaminating the interior of the electro-hydraulic push rod.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] 1. By arranging a buffer device inside the oil cylinder, when the piston rod is subjected to excessive external pressure, the piston rod contracts sharply, and the buffer device can be used for buffering to prevent the excessive internal pressure from damaging the piston rod and cylinder body, thereby extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall appearance structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the overall internal structure of the utility model;

[0025] Figure 3 yes Figure 2 A schematic diagram of the structure enlargement in the middle;

[0026] In the figure: 1. earring; 11. bearing; 2. cylinder; 21. rear end cover; 22. piston rod; 23. pressure-resistant oil pipe; 24. oil return port; 3. oil tank; 31. oil plug; 4. motor; 5. dust cover; 6. guide sleeve; 7. piston; 71. sealing ring; 8. buffer plate; 81. sealing ring; 82. oil passage; 83. spring; 84. buffer block. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] The utility model is further described below in conjunction with the accompanying drawings.

[0029] like Figure 1 As shown, a high-sealing and leak-proof oil cylinder for geological exploration includes an oil tank 3 and a cylinder barrel 2, a rear end cover 21 is provided between the side walls of the cylinder barrel 2 and the oil tank 3, the rear end cover 21 of the cylinder barrel 2 is fixedly connected to the side wall of the oil tank 3, a top cover is provided on the top of the oil tank 3, the top cover is fixedly connected to the oil tank 3 by bolts, and an oil plug 31 is provided at the bottom of the left side wall of the oil tank 3; the top cover of the oil tank 3 can be removed to fill the hydraulic oil into the oil tank 3, and the bottom oil plug 31 is convenient for replacing the hydraulic oil.

[0030] An earring 1 is provided at one end of the piston rod 22 away from the rear end cover 21. The earring 1 is connected to the piston rod 22 as a whole. A bearing 11 is provided inside the earring 1. The earring 1 is convenient for connecting the oil cylinder with an external device and is easy to disassemble and install.

[0031] The end of the piston rod 22 close to the earring 1 and the cylinder 2 are covered with a dust cover 5, which is expandable and contractible. The dust cover 5 is made of rubber material and can be extended and elongated as the piston rod 22 moves. At this time, the part of the piston rod 22 that protrudes from the cylinder 2 is protected by the dust cover 5, which effectively prevents dust from contaminating the interior of the electro-hydraulic push rod.

[0032] like Figure 2 and Figure 3 As shown, a piston 7 assembly is provided inside the cylinder 2, and the piston 7 assembly includes a piston rod 22 and a piston 7. The piston 7 is provided at one end of the piston rod 22 close to the rear end cover 21, and the piston 7 and the piston rod 22 are fixedly connected;

[0033] The rear end cover 21 is provided with an oil return port 24 at the center thereof, and the oil return port 24 is connected to the inside of the oil tank 3. The upper end of the cylinder barrel 2 is provided with a pressure-resistant oil pipe 23, and one end of the pressure-resistant oil pipe 23 is connected to the inside of the front end of the cylinder barrel 2, and the other end is connected to the inside of the oil tank 3.

[0034] A buffer device is provided between the piston 7 and the rear end cover 21 .

[0035] The buffer device includes a buffer plate 8, a spring 83 and a buffer block 84. The buffer plate 8 is arranged on the left side of the piston 7. The spring 83 is arranged on the left side of the buffer plate 8. The buffer block 84 is fixed on the right side wall of the rear end cover 21. One end of the spring 83 is fixed on the side wall of the buffer block 84, and the other end is fixed on the side wall of the buffer plate 8.

[0036] An oil passage 82 is disposed at the center of the buffer plate 8 .

[0037] A sealing ring 71 is provided on the outer peripheral wall of the piston 7, and a sealing ring 81 is provided on the outer peripheral wall of the buffer plate 8. The provision of the sealing ring 71 and the sealing ring 81 enhances the sealing performance between the piston 7 and the buffer plate 8 and the cylinder 2 to prevent leakage of the hydraulic oil.

[0038] A guide sleeve 6 is provided at one end of the piston rod 22 close to the earring 1. The guide sleeve 6 is sleeved on the piston rod 22. The guide sleeve 6 limits the displacement of the piston rod 22 and limits the radial direction of the piston rod 22, thereby effectively preventing the piston rod 22 from deviating during movement and reducing the wear between the piston rod 22 and the cylinder 2.

[0039] The working principle of the utility model is: when in use, when the piston rod 22 retracts and moves back, the hydraulic oil enters the oil return port 24 through the oil passage 82 of the buffer plate 8 and then flows into the oil tank 3. When the pressure on the earring 1 outside suddenly increases, which in turn causes the pressure inside the cylinder 2 to increase, the piston rod 22 moves quickly to the bottom. When the pressure of the hydraulic oil reaches a certain value, it has no time to flow out from the oil passage 82. At this time, the buffer plate 8 will be squeezed and slid, so that the flow rate of the hydraulic oil is blocked, resulting in a decrease in flow rate. The moving speeds of the buffer plate 8 and the piston 7 are both reduced, which plays a buffering role.

[0040] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A highly sealed and leak-proof oil cylinder for geological exploration, comprising an oil tank (3) and a cylinder barrel (2), a rear end cover (21) being provided between the side walls of the cylinder barrel (2) and the oil tank (3), the rear end cover (21) of the cylinder barrel (2) being fixedly connected to the side wall of the oil tank (3), a top cover being provided on the top of the oil tank (3), the top cover being fixedly connected to the oil tank (3) by bolts, and an oil plug (31) being provided at the bottom of the left side wall of the oil tank (3); characterized in that: A piston (7) assembly is provided inside the cylinder (2), and the piston (7) assembly comprises a piston rod (22) and a piston (7). The piston (7) is provided at one end of the piston rod (22) close to the rear end cover (21), and the piston (7) and the piston rod (22) are fixedly connected. The rear end cover (21) is provided with an oil return port (24) at the center thereof, the oil return port (24) being connected to the interior of the oil tank (3); the upper end of the cylinder barrel (2) is provided with a pressure-resistant oil pipe (23), one end of the pressure-resistant oil pipe (23) being connected to the interior of the front end of the cylinder barrel (2), and the other end being connected to the interior of the oil tank (3); A buffer device is provided between the piston (7) and the rear end cover (21).

2. The high-sealing and leak-proof oil cylinder for geological exploration according to claim 1 is characterized in that: The buffer device comprises a buffer plate (8), a spring (83) and a buffer block (84); the buffer plate (8) is arranged on the left side of the piston (7); the spring (83) is arranged on the left side of the buffer plate (8); the buffer block (84) is fixed on the right side wall of the rear end cover (21); one end of the spring (83) is fixed on the side wall of the buffer block (84) and the other end is fixed on the side wall of the buffer plate (8); An oil passage (82) is provided at the center of the buffer plate (8).

3. The high-sealing and leak-proof oil cylinder for geological exploration according to claim 2 is characterized by: An earring (1) is provided at one end of the piston rod (22) away from the rear end cover (21); the earring (1) and the piston rod (22) are connected as a whole; a bearing (11) is provided inside the earring (1).

4. The high-sealing and leak-proof oil cylinder for geological exploration according to claim 3 is characterized by: A sealing ring (71) is provided on the outer peripheral wall of the piston (7), and a sealing ring (81) is provided on the outer peripheral wall of the buffer plate (8); A guide sleeve (6) is provided at one end of the piston rod (22) close to the earring (1), and the guide sleeve (6) is sleeved on the piston rod (22).

5. The high-sealing and leak-proof oil cylinder for geological exploration according to claim 4 is characterized by: A dust cover (5) is provided on the end of the piston rod (22) close to the earring (1) and the cylinder barrel (2), and the dust cover (5) can be extended and retracted.

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