A gas-liquid buffer device

Abstract

The application is a kind of gas-liquid buffer device, belonging to a kind of mechanical buffer equipment.The technical scheme of the application is: including extension rod body and cylinder body, the front and rear ends of cylinder body are respectively provided with hydraulic A port and hydraulic B port, hydraulic A port and hydraulic B port are connected with hydraulic pipe respectively and are communicated at adjustable flow valve; the rear end of extension rod body in cylinder body is provided with push rod, extension rod body and push rod are not connected, and the front end piston is arranged in the sleeve of extension rod body, the front end of the inside of cylinder body is provided with front positioning sleeve, the front end air passage is arranged in front positioning sleeve, and the front end air passage is communicated with the middle position of cylinder body outside and inside; the rear end of extension rod body is connected with push rod, and the connecting position is provided with air push piston, which realizes quick push-out through air cylinder, and reduces the impact of retraction through hydraulic buffer; the device combines gas and liquid, and compared with single air pressure brake block and hydraulic braking force, the advantages of the structure are fully corresponding, and the use efficiency of product is improved.

Description

TECHNICAL FIELD

[0001] The application is a kind of gas-liquid buffer device, belonging to a kind of mechanical buffer equipment. BACKGROUND

[0002] In some mechanical motion equipment, the power equipment that bears the equipment motion usually has two processes of feeding and returning,

[0003] The feeding process requires speed torque to meet the requirements, and when returning, it needs to be slowly accepted to avoid impact damage.

[0004] Taking coal gangue sorting as an example, when sorting, coal gangue needs to be sorted out by moving equipment, and then the moving equipment is retracted for the next extension. The retraction process usually needs to control the speed to avoid fast retraction causing impact and causing equipment damage.

[0005] At present, the retraction process usually adopts spring structure, but the impact resistance of the spring is poor, and it needs to be frequently replaced and maintained. SUMMARY

[0006] In view of the above problems, the application provides a kind of gas-liquid buffer device, which solves the buffer of gas-liquid pressure equipment retraction and improves the buffer force and service life.

[0007] To achieve the above purpose, the technical scheme adopted by the application is:

[0008] The application gas-liquid buffer device includes an extension rod body and a cylinder body, characterized in that,

[0009] The front and rear ends of the cylinder body are respectively provided with hydraulic A port and hydraulic B port, and the hydraulic A port and the hydraulic B port are respectively connected with hydraulic pipes and communicated at an adjustable flow valve;

[0010] The rear end of the extension rod body in the cylinder body is provided with a push rod, the extension rod body and the push rod are not connected, the extension rod body is sleeved with a front end piston in the cylinder body, a front positioning sleeve is arranged at the front end of the cylinder body inside, and a front end air duct is arranged in the front positioning sleeve;

[0011] The rear end of the extension rod body is provided with a gas push piston, the cylinder body is provided with a rear positioning sleeve at the rear end inside, a rear end air duct is arranged in the rear positioning sleeve to communicate the rear end of the cylinder body with the outside, the push rod passes through the middle through hole of the rear positioning sleeve, a rear end piston is fixedly arranged at the rear end of the push rod, and the rear end piston is communicated between the rear end of the push rod and the hydraulic B port;

[0012] The front end piston is fixed on the front end of the front moving sleeve, the front moving sleeve is a through hole sleeve on the extension rod body, the rear end of the front moving sleeve passes through the middle through hole of the front positioning sleeve and is between the extension rod body and the front positioning sleeve, and the rear end of the front moving sleeve leaks out of the front positioning sleeve.

[0013] According to the gas-liquid buffer device, the cylinder cavity between the front positioning sleeve and the gas push piston is a front gas chamber, the front positioning sleeve is provided with a gas A port communicated with the outside, and the rear positioning sleeve is provided with a gas B port communicated with the outside.

[0014] According to the gas-liquid buffer device, the front moving sleeve leaks out of the front positioning sleeve by a length consistent with the length of the front end piston and the front end of the cylinder, and the front hydraulic chamber surrounded by the front end piston, the extension rod body and the cylinder is connected with the hydraulic A port.

[0015] According to the gas-liquid buffer device, the rear end piston, the rear end surface of the push rod and the cylinder form a rear hydraulic chamber with the hydraulic B port.

[0016] According to the gas-liquid buffer device, the space between the gas push piston, the rear positioning sleeve and the cylinder is a rear gas chamber.

[0017] According to the gas-liquid buffer device, the front end of the extension rod body is provided with a threaded stud, the threaded stud is provided with a connecting shaft, the front end of the connecting shaft is provided with a pin hole connected with the to-be-buffered component through a pin shaft, the rear end of the extension rod body is connected with the gas push piston through a threaded rod, the gas push piston is fixed at the connecting position, and the outer diameter of the push rod is greater than the outer diameter of the extension rod body.

[0018] According to the gas-liquid buffer device, the cylinder is provided with mounting holes for mounting the front positioning sleeve and the rear positioning sleeve, the outer periphery of the two groups of positioning sleeves is provided with protruding holes embedded in the mounting holes, and the gas A port and the gas B port leak out of the cylinder at the position of the mounting holes.

[0019] According to the gas-liquid buffer device, the cylinder includes a front end piece, an intermediate metal pipe and a rear end piece, the hydraulic A port and the hydraulic B port are respectively arranged on the front end piece and the rear end piece, the rear part of the rear end piece is provided with a connecting plate, and the mounting hole is arranged on the intermediate metal pipe.

[0020] The present application has the following advantages:

[0021] The gas cylinder is used for rapid pushing, the hydraulic buffer is used for retraction, and the retraction impact is reduced.

[0022] The device combines gas and liquid, has large braking force compared with a single gas pressure brake block or a single hydraulic brake, fully utilizes the advantages of the structure, and improves the use efficiency of the product.

[0023] The device improves the service life of the product. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a state diagram of the extension rod body of the present application when the extension rod body is not extended.

[0025] Figure 2 is a state diagram of the extension rod body of the present application when the extension rod body is extended.

[0026] Figure 3is the state diagram of the extension rod body buffering when retreating.

[0027] Reference signs:

[0028] 1 extension rod body, 2 cylinder body, 3 hydraulic A port, 4 hydraulic B port, 5 adjustable flow valve, 6 push rod, 7 front end piston, 8 front positioning sleeve, 9 front end air channel, 10 gas push piston, 11 rear positioning sleeve, 12 rear end air channel, 13 rear end piston, 14 front air chamber, 15 gas A port, 16 gas B port, 17 front moving sleeve, 18 rear air chamber. DETAILED DESCRIPTION

[0029] The structure of the present application is further described below,

[0030] The gas-liquid buffering device of the present application comprises an extension rod body 1 and a cylinder body 2, and the front and rear ends of the cylinder body 2 are respectively provided with a hydraulic A port 3 and a hydraulic B port 4, the hydraulic A port 3 and the hydraulic B port 4 are respectively connected to hydraulic pipes and are connected to each other at an adjustable flow valve 5.

[0031] The cylinder body 2 comprises a front end piece, a middle metal pipe and a rear end piece, the hydraulic A port 3 and the hydraulic B port 4 are respectively arranged on the front end piece and the rear end piece, and a connecting plate is arranged at the rear part of the rear end piece, and the mounting hole is arranged on the middle metal pipe.

[0032] The extension rod body is arranged in the cylinder body, and the extension rod body is arranged at the position of the front end piece, the rear end of the extension rod body 1 in the cylinder body 2 is provided with a split push rod 6, the extension rod body is provided with a front end piston 7 in the cylinder body 2, the rear end of the front end piston 7 is provided with a front positioning sleeve 8 inside the cylinder body 2, and the front positioning sleeve 8 is provided with a front end air channel 9 inside.

[0033] The cylinder body 2 is provided with a rear positioning sleeve 11 at the inside rear end, the rear positioning sleeve 11 is provided with a rear end air channel 12, the push rod 6 passes through the middle 17 through hole of the rear positioning sleeve 11, the rear end of the push rod 6 is fixedly provided with a rear end piston 13, and the rear end piston 13 is connected to the hydraulic B port 4.

[0034] In the device, the cavity of the cylinder body 2 between the front positioning sleeve 8 and the gas push piston 10 is a front air chamber 14, the front positioning sleeve 8 is provided with a gas A port 15 at the position of the cylinder body 2, and the rear positioning sleeve 11 is provided with a gas B port 16 connected to the outside.

[0035] The front end piston 7 is fixed on the front end of the front moving sleeve 17, the middle of the front moving sleeve 17 is a through hole sleeve on the extension rod body, the rear end of the front moving sleeve 17 passes through the middle through hole of the front positioning sleeve 8 and is between the extension rod body and the front positioning sleeve 8, the front hydraulic cavity surrounded by the front end piston 7, the extension rod body and the cylinder body 2 is connected to the hydraulic A port 3.

[0036] When the air pushing piston moves to the rear end of the front moving sleeve 17, it pushes the front moving sleeve 17 forward, and drives the front end piston to extrude the front hydraulic cavity.

[0037] The rear end piston 13, the rear end face of the push rod 6 and the cylinder body 2 and the hydraulic B port 4 form a rear hydraulic cavity. The space between the air pushing piston, the rear positioning sleeve 11 and the cylinder body 2 is a rear air chamber 18.

[0038] The front end of the extension rod body is provided with a threaded rod, a connecting shaft is arranged on the threaded rod, a pin hole is arranged at the front end of the connecting shaft, and a to-be-buffered part is connected through a pin shaft, the rear end of the extension rod body is connected with the air pushing piston through a threaded rod, the air pushing piston 10 is fixed at the connecting position, and the outer diameter of the push rod 6 is greater than the outer diameter of the extension rod body.

[0039] The cylinder body 2 is provided with mounting holes for mounting the front positioning sleeve 8 and the rear positioning sleeve 11, and protruding holes are arranged on the outer peripheries of the two groups of positioning sleeves and embedded in the mounting holes, and the gas A port 15 and the gas B port 16 leak out of the cylinder body 2 at the positions of the mounting holes.

[0040] When the device is used, in the forward buffering process, the extension rod body is quickly pulled forward under the action of an external mechanism, air enters the rear air chamber, air in the air well of the intermediate cylinder structure is discharged through the gas A port, the front moving sleeve is pushed when the air pushing piston moves to the rear end of the front moving sleeve, the speed is reduced, the hydraulic pressure in the front hydraulic cavity is extruded by the front end piston, the space between the front end piston and the front positioning sleeve is expanded, negative pressure is generated, the hydraulic pressure is pushed out through the hydraulic A port, enters the rear hydraulic cavity through the adjustable flow valve, the hydraulic pressure in the rear hydraulic cavity enters, the rear end piston is extruded to move forward, the push rod is pulled forward at the rear positioning sleeve, and the gas in the cavity between the rear end piston and the rear positioning sleeve is extruded. The above process realizes controllable flow of hydraulic pressure through expansion and compression of gas, and realizes end buffering of the extension rod body.

[0041] In the backward buffering process, the extension rod body is quickly pulled backward under the action of an external mechanism, air in the rear air chamber is discharged through the rear air passage, air in the air well of the intermediate cylinder structure enters the gas A port, the push rod is pushed to move backward when the air pushing piston moves to the front end of the push rod, the hydraulic pressure in the hydraulic cavity is extruded by the rear end piston, the space between the rear end piston and the rear positioning sleeve is expanded, negative pressure is generated, the hydraulic pressure is pushed out through the hydraulic B port, enters the front hydraulic cavity through the adjustable flow valve, the hydraulic pressure in the front hydraulic cavity enters, the front end piston is extruded to move backward, and the front moving sleeve pushes the push rod to move backward. The above process realizes controllable flow of hydraulic pressure through expansion and compression of gas, and realizes end buffering of the extension rod body.

Claims

1. A gas-liquid buffer device, comprising an extension rod (1) and a cylinder (2), characterized in that, The cylinder body (2) is provided with hydraulic port A (3) and hydraulic port B (4) at its front and rear ends respectively. Hydraulic port A (3) and hydraulic port B (4) are respectively connected to hydraulic pipes and connected at the adjustable flow valve (5); The cylinder (2) has a push rod (6) at the rear end of the extension rod (1). The extension rod and the push rod are not connected. The extension rod is fitted with a front piston (7) inside the cylinder (2). The rear end of the front piston (7) is fitted with a front positioning sleeve (8) at the front end inside the cylinder (2). The front positioning sleeve (8) is fitted with a front air passage (9). The front air passage (9) connects the outside of the cylinder (2) and the middle position inside the cylinder (2). The front end of the extended rod is provided with a stud, and a connecting shaft is provided on the stud. The front end of the connecting shaft is provided with a pin hole and is connected to the component to be buffered by the pin. The rear end of the extended rod is connected to the air piston (10) by a threaded rod. The cylinder (2) has a rear positioning sleeve (11) at its rear end. The rear positioning sleeve (11) has a rear air passage (12) that connects the rear end of the cylinder to the outside. The rear air passage connects the outside of the cylinder (2) and the inside of the cylinder (2). The push rod (6) passes through the middle through hole of the rear positioning sleeve (11). The rear end of the push rod (6) is fixedly provided with a rear piston (13). The rear part of the rear piston (13) is connected to the hydraulic port B (4). The front piston (7) is fixed on the front end of the front moving sleeve (17). The front moving sleeve (17) has a through hole in the middle and is fitted onto the extension rod. The rear end of the front moving sleeve (17) passes through the middle through hole of the front positioning sleeve (8) and is located between the extension rod and the front positioning sleeve (8). The rear end of the front moving sleeve (17) protrudes from the front positioning sleeve. The inner cavity of the cylinder (2) between the front positioning sleeve (8) and the front piston (7) is the front air chamber (14). The front positioning sleeve (8) is provided with a gas port A (15) at the position of the cylinder (2) to communicate with the outside, and the rear positioning sleeve (11) is provided with a gas port B (16) to communicate with the outside. The length of the front moving sleeve (17) exposed by the front positioning sleeve is consistent with the length of the front piston (7) and the front end of the cylinder. The front hydraulic chamber formed by the front piston (7), the extension rod and the cylinder (2) is connected to the hydraulic port A (3). The rear end face of the rear piston (13), push rod (6) and cylinder (2) together with hydraulic port B (4) form the rear hydraulic chamber; The space between the air-driven piston, the rear positioning sleeve (11) and the cylinder (2) is the rear air chamber (18).

2. The gas-liquid buffer device according to claim 1, characterized in that, A stud is provided at the front end of the protruding rod, and the outer diameter of the push rod (6) is larger than the outer diameter of the protruding rod.

3. The gas-liquid buffer device according to claim 1, characterized in that, The cylinder body (2) has mounting holes for mounting the front positioning sleeve (8) and the rear positioning sleeve (11). The outer periphery of the two sets of positioning sleeves has protruding holes that are embedded in the mounting holes. Gas port A (15) and gas port B (16) are exposed in the cylinder body (2) at the mounting hole position.

4. The gas-liquid buffer device according to claim 3, characterized in that, The cylinder body (2) includes a front end part, a middle metal tube and a rear end part. The hydraulic port A (3) and hydraulic port B (4) are respectively opened on the front end part and the rear end part. The rear end part is provided with a connecting plate. The mounting hole is opened on the middle metal tube.

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