Bidirectional anti-explosion oil cylinder

Abstract

The utility model relates to the technical field of two-way oil cylinders, in particular to a two-way anti-explosion oil cylinder which comprises a cylinder body, a cylinder bottom is fixedly installed at one end of the cylinder body, a cylinder cover is installed at the end, away from the cylinder bottom, of the cylinder body in a sealed threaded mode, a moving hole is formed in the cylinder cover, and a piston rod is installed in the moving hole in a sealed sliding mode. An oil guide channel is formed in one end of the piston rod, a piston is installed at one end of the piston rod, an oil guide hole communicated with the oil guide channel is formed in the piston, an anti-explosion valve is fixedly installed in the oil guide hole, and the side wall of the piston is in sealed sliding contact with the inner wall of the cylinder body. When the oil pressure on one side of the piston is too large, the anti-explosion valve can be automatically opened, and hydraulic oil on one side can flow into the other side of the piston through the oil guide hole and the oil guide channel at the moment, so that the oil pressure on one side of the piston is reduced, it is guaranteed that the pressure in a system is within a constant range, and the safety and stability of the oil cylinder are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to two -way oil cylinder technical field especially relates to a two -way explosion -proof oil cylinder. BACKGROUND

[0002] Two -way oil cylinder is widely used in various industrial and civilian fields, especially in the environment that needs high safety and high reliability, two -way oil cylinder is based on the action of hydraulic system, realizes the push -and -pull movement of piston through the flow and pressure change of hydraulic oil, specifically, two -way oil cylinder utilizes the action of hydraulic oil through hydraulic system, makes the piston in the oil cylinder produce push -and -pull movement, thereby realizes the push -and -pull action to object.

[0003] The existing two -way oil cylinder lacks explosion -proof device, when the oil pressure in the oil cylinder is too high in the process of stretching out or retracting, the oil cylinder body may explode, and the safety and stability are low. UTILITY MODEL CONTENTS

[0004] The utility model discloses a two -way explosion -proof oil cylinder, which can prevent the oil cylinder from exploding when the oil pressure in the oil cylinder is too high, improve the safety and stability of the oil cylinder, and provide a reference for the design of two -way oil cylinders.

[0005] In order to realize the above -mentioned purpose, the utility model adopts the following technical scheme:

[0006] A two -way explosion -proof oil cylinder, comprising a cylinder body, a cylinder bottom is fixedly installed at one end of the cylinder body, a first oil inlet is formed in the cylinder bottom, the first oil inlet is communicated with the cylinder body, a second oil inlet is formed in the side wall of the cylinder body;

[0007] The end of the cylinder body away from the cylinder bottom is sealingly screwed with a cylinder cover, a moving hole is formed in the cylinder cover, a piston rod is sealingly and slidably installed in the moving hole, one end of the piston rod extends into the cylinder body, an oil guide channel is formed in one end of the piston rod, a piston is installed at one end of the piston rod, one end of the piston is sealingly screwed into the oil guide channel, an oil guide hole communicated with the oil guide channel is formed in the piston, an explosion -proof valve is fixedly installed in the oil guide hole, and the side wall of the piston and the inner wall of the cylinder body are sealingly and slidably contacted.

[0008] Preferably, a first connecting interface is formed in the end of the cylinder bottom away from the cylinder body, and a second connecting interface is formed in the end of the piston rod away from the piston.

[0009] Preferably, a first sealing element is arranged between the side wall of the piston and the inner wall of the cylinder body, a second sealing element is arranged between the piston and the piston rod, a third sealing element is arranged between the cylinder cover and the cylinder body, and a fourth sealing element is arranged between the cylinder cover and the piston rod.

[0010] Preferably, the piston rod adopts QPQ nitriding process, and is plated with hard chromium and polished on the surface.

[0011] Preferably, the outer surface of the cylinder adopts electrostatic spraying process, and the inner wall is finely ground.

[0012] Preferably, the piston body is made of high-strength aluminum alloy material, and is subjected to oxidation resistance and wear resistance treatment on the surface.

[0013] In the utility model, beneficial effects are that:

[0014] In the process of stretching out or retracting, when the oil pressure on one side of the piston is too large, the explosion-proof valve will be automatically opened, at this time, the hydraulic oil on one side will flow into the other side of the piston through the oil guide hole and the oil guide channel, so as to reduce the oil pressure on one side of the piston, ensure that the pressure in the system is within a constant range, and improve the safety and stability of the oil cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective structural schematic view of a bidirectional explosion-proof oil cylinder provided in the utility model;

[0016] Figure 2 It is a front view sectional structure schematic view of a bidirectional explosion-proof oil cylinder provided in the utility model;

[0017] Figure 3 It is a perspective structural schematic view of a piston rod and a piston;

[0018] Figure 4 It is a perspective local sectional structure schematic view of a piston rod and a piston;

[0019] Figure 5 It is a structure enlarged view of A in the figure; Figure 2 It is a structure enlarged view of B in the figure.

[0020] Figure 6 It is a structure enlarged view of A in the figure; Figure 2 It is a structure enlarged view of B in the figure.

[0021] In the figure, 1 is a cylinder body, 2 is a cylinder bottom, 3 is a first oil inlet, 4 is a cylinder cover, 5 is a piston rod, 6 is an oil guide channel, 7 is a piston, 8 is an oil guide hole, 9 is an explosion-proof valve, 10 is a first connecting interface, 11 is a second connecting interface, 12 is a first sealing element, 13 is a second sealing element, 14 is a third sealing element, and 15 is a fourth sealing element. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] Reference Figures 1-6The utility model provides a kind of bidirectional explosion-proof oil cylinder, including cylinder body 1, one end of cylinder body 1 is fixedly installed with cylinder bottom 2, first oil inlet 3 is opened in cylinder bottom 2, first oil inlet 3 is communicated with cylinder body 1, second oil inlet is opened in the side wall of cylinder body 1, and first oil inlet 3 and second oil inlet are connected with two oil pipes respectively.

[0024] Sealing threaded installation is equipped with cylinder cover 4 in the end of cylinder body 1 away from cylinder bottom 2, and moving hole is opened in cylinder cover 4, and piston rod 5 is sealingly slidably installed in moving hole, and one end of piston rod 5 extends into cylinder body 1, and oil guide channel 6 is opened in one end of piston rod 5, and piston 7 is installed in one end of piston rod 5, and one end of piston 7 is sealingly screwed in oil guide channel 6, and oil guide hole 8, which is communicated with oil guide channel 6, is opened in piston 7, and explosion-proof valve 9 is fixedly installed in oil guide hole 8, and the side wall of piston 7 is sealingly slidably contacted with the inner wall of cylinder body 1.

[0025] In the process of being pushed by hydraulic oil to extend or retract in cylinder body 1, when the oil pressure on one side of piston 7 is too large, explosion-proof valve 9 will be automatically opened under the action of oil pressure, and at this time, the hydraulic oil on the side of piston 7 with excessive oil pressure will flow to the other side of piston 7 through oil guide hole 8 and oil guide channel 6, so as to reduce the oil pressure on the side of piston 7 with excessive oil pressure, ensure that the pressure in the system is within a constant range, and improve the safety and stability of the oil cylinder.

[0026] First connecting interface 10 is opened in the end of cylinder bottom 2 away from cylinder body 1, and second connecting interface 11 is opened in the end of piston rod 5 away from piston 7, and the setting of first connecting interface 10 and second connecting interface 11 can facilitate the connection of oil cylinder and external equipment.

[0027] First sealing element 12 is arranged between the side wall of piston 7 and the inner wall of cylinder body 1, second sealing element 13 is arranged between piston 7 and piston rod 5, third sealing element 14 is arranged between cylinder cover 4 and cylinder body 1, and fourth sealing element 15 is arranged between cylinder cover 4 and piston rod 5, so as to ensure the sealing property of oil cylinder during operation and avoid the exposure of hydraulic oil.

[0028] QPQ nitriding process is used for piston rod 5, and the surface is plated with hard chromium and polished, so as to increase the corrosion resistance and acid and alkali resistance of piston rod 5, and effectively prevent the wear of piston rod 5 during reciprocating motion.

[0029] The outer surface of cylinder body 1 is treated by electrostatic spraying process, and the inner wall is finely ground, so as to increase the adhesion of surface, widely used in harsh environment, and ensure the smoothness of piston 7 and reduce the possibility of heat generated by friction.

[0030] The main body of piston 7 is made of high-strength aluminum alloy material, and the surface is treated by anti-oxidation and wear resistance, so as to ensure the service life of piston 7 and the sealing property between piston 7 and cylinder body 1.

[0031] In the utility model, in the process of the piston rod 5 being pushed by the hydraulic oil to stretch out or retract in the cylinder body 1, when the oil pressure of one side of the piston 7 is too large, under the action of the oil pressure, the explosion-proof valve 9 will automatically open, at this moment the hydraulic oil of the side of the piston 7 with too high oil pressure will flow to the other side of the piston 7 through the oil guide hole 8 and the oil guide channel 6, thereby reducing the oil pressure of the side of the piston 7 with too high oil pressure, ensuring that the pressure in the system is within a constant range, and improving the safety and stability of the oil cylinder.

[0032] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A bidirectional explosion-proof oil cylinder comprising a cylinder body (1), characterized in that, One end of the cylinder (1) is fixedly installed with a cylinder bottom (2), a first oil inlet (3) is opened in the cylinder bottom (2), the first oil inlet (3) is communicated with the cylinder (1), a second oil inlet is opened in the side wall of the cylinder (1); The end of the cylinder (1) away from the cylinder bottom (2) is sealingly and threadedly installed with a cylinder cover (4), the cylinder cover (4) is opened with a moving hole, the moving hole is sealingly and slidably installed with a piston rod (5), one end of the piston rod (5) extends into the cylinder (1), the one end of the piston rod (5) is opened with an oil guide channel (6), the one end of the piston rod (5) is installed with a piston (7), the one end of the piston (7) is sealingly and threadedly connected in the oil guide channel (6), the piston (7) is opened with an oil guide hole (8) communicated with the oil guide channel (6), the oil guide hole (8) is fixedly installed with an explosion-proof valve (9), the side wall of the piston (7) is sealingly and slidably contacted with the inner wall of the cylinder (1).

2. The bidirectional explosion-proof oil cylinder according to claim 1, characterized in that, The end of the cylinder bottom (2) away from the cylinder (1) is opened with a first connecting interface (10), the end of the piston rod (5) away from the piston (7) is opened with a second connecting interface (11).

3. The bidirectional explosion-proof cylinder of claim 1, wherein, The first sealing element (12) is arranged between the side wall of the piston (7) and the inner wall of the cylinder (1), the second sealing element (13) is arranged between the piston (7) and the piston rod (5), the third sealing element (14) is arranged between the cylinder cover (4) and the cylinder (1), and the fourth sealing element (15) is arranged between the cylinder cover (4) and the piston rod (5).

4. The bidirectional explosion-proof oil cylinder of claim 1, wherein, The piston rod (5) adopts QPQ nitriding process, and the surface is plated with hard chromium and polished.

5. The bidirectional explosion-proof cylinder of claim 1, wherein, The outer surface of the cylinder (1) adopts electrostatic spraying process, and the inner wall is finely ground.

6. The bidirectional explosion-proof oil cylinder of claim 1, wherein, The main body of the piston (7) is made of high-strength aluminum alloy material, and the surface is subjected to oxidation resistance and wear resistance treatment.

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