Gas-liquid buffer device

Abstract

The invention relates to a gas-liquid buffer device, and belongs to mechanical buffer equipment. According to the technical scheme, the extension rod comprises an extension rod body and a cylinder body, a hydraulic port A and a hydraulic port B are formed in the front end and the rear end of the cylinder body respectively, and the hydraulic port A and the hydraulic port B are connected with hydraulic pipes respectively and communicated at an adjustable throttling valve; a push rod is arranged at the rear end of an extension rod body in the cylinder body, the extension rod body is not connected with the push rod, 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 in the cylinder body at the rear end of the front-end piston, and a front-end air channel is formed in the front positioning sleeve and communicated with the exterior of the cylinder body and the middle position in the cylinder body; the rear end of the extension rod body is connected with the push rod, and the air push piston is arranged at the connection position, so that rapid push-out is realized through the cylinder, and retraction impact is reduced through hydraulic buffering retraction; according to the device, gas and liquid are combined, compared with an independent pneumatic brake block and a hydraulic brake block, the braking force is large, structural correspondence is sufficient, and the use efficiency of products is improved.

Description

Technical Field

[0001] The invention relates to a gas-liquid buffer device, belonging to a mechanical buffer equipment. Background Art

[0002] In some mechanical motion equipment, the power equipment that bears the movement of the equipment usually has two processes: feeding and returning. The feeding process requires the speed and torque to meet the requirements, and the return process needs to be slow to avoid impact damage.

[0003] Take the sorting of coal gangue as an example. During sorting, the coal gangue needs to be sorted out by moving the equipment quickly, and then the equipment retracts to extend it again. The retraction process usually needs to control the speed to avoid impact caused by too fast retraction, which may cause equipment damage.

[0004] Currently, the retraction process usually adopts a spring structure, but the spring has poor impact resistance and needs frequent replacement and maintenance. Summary of the invention

[0005] In view of the above problems, the present invention provides a gas-liquid buffer device to solve the buffering problem during the retraction of gas-hydraulic equipment and improve the buffering force and service life.

[0006] To achieve the above object, the technical solution adopted by the present invention is: The invention discloses a gas-liquid buffer device, comprising a protruding rod and a cylinder, characterized in that: The front and rear ends of the cylinder body are respectively provided with a hydraulic port A and a hydraulic port B, and the hydraulic port A and the hydraulic port B are respectively connected to hydraulic pipes and are connected at an adjustable flow valve; A push rod is arranged at the rear end of the extension rod body in the cylinder body, and the extension rod body and the push rod are not connected. The extension rod body is provided with a sleeve provided with a front piston in the cylinder body, and a front positioning sleeve is arranged at the front end of the cylinder body at the rear end of the front piston, and a front air passage is arranged in the front positioning sleeve, and the front air passage is connected to the outside of the cylinder body and the middle position inside the cylinder body; The rear end of the extended rod body is connected to the push rod, and a gas push piston is set at the connection position. A rear positioning sleeve is arranged at the rear end of the cylinder body, and a rear air passage is arranged in the rear positioning sleeve to connect the rear end of the cylinder body with the outside, and the air passage connects the outside and the inside of the cylinder body. The push rod passes through the middle through hole of the rear positioning sleeve, and a rear piston is fixedly arranged at the rear end of the push rod, and the rear part of the rear piston is connected to the hydraulic port B; The front end piston is fixed on the front end of the front movable sleeve, the middle of the front movable sleeve is a through hole sleeved on the extension rod body, the rear end of the front movable sleeve passes through the middle through hole of the front positioning sleeve and is located between the extension rod body and the front positioning sleeve, and the rear end of the front movable sleeve leaks out of the front positioning sleeve.

[0007] According to the gas-liquid buffer device, the inner cavity of the cylinder body between the front positioning sleeve and the air push piston is the front air chamber, the front positioning sleeve is provided with a gas port A at the cylinder body position to communicate with the outside, and the rear positioning sleeve is provided with a gas port B to communicate with the outside.

[0008] According to the gas-liquid buffer device, the length of the front moving sleeve leaking out of the front positioning sleeve is consistent with the length of the front piston and the front end of the cylinder body, and the front hydraulic chamber surrounded by the front piston, the extending rod body and the cylinder body is connected to the hydraulic port A.

[0009] According to the gas-liquid buffer device, the rear end piston, the rear end surface of the push rod and the cylinder body and the hydraulic port B form a rear hydraulic chamber.

[0010] According to the gas-liquid buffer device, the space between the gas-pushing piston, the rear positioning sleeve 11 and the cylinder body 2 is the rear air chamber 18 .

[0011] According to the gas-liquid buffer device, a stud is arranged at the front end of the extending rod body, a connecting shaft is arranged on the stud, a pin hole is arranged at the front end of the connecting shaft and is connected to the buffer component through a pin shaft, the rear end of the extending rod body is connected to the push rod through a threaded rod, the gas push piston is fixed at the connection, and the outer diameter of the push rod is larger than the outer diameter of the deep rod.

[0012] According to the gas-liquid buffer device, a mounting hole is opened on the cylinder body to install the front positioning sleeve and the rear positioning sleeve, and the outer periphery of the two sets of positioning sleeves are provided with protruding holes embedded in the mounting holes, and the gas A port and the gas B port leak out of the cylinder body at the mounting hole position.

[0013] According to the gas-liquid buffer device, the cylinder body includes a front end member, an intermediate metal tube and a rear end member, the hydraulic port A and the hydraulic port B are respectively opened on the front end member and the rear end member, a connecting plate is provided at the rear of the rear end member, and the mounting hole is opened on the intermediate metal tube.

[0014] The advantages of the present invention are: Rapid push-out is achieved through the cylinder, and retraction is achieved through hydraulic buffering to reduce retraction shock; This device combines gas and liquid, and has greater braking force than separate pneumatic brake pads and hydraulic brakes, fully utilizing the advantages of structural correspondence to improve the efficiency of product use; The device structure increases the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a state diagram when the extension rod body of the present invention is not extended.

[0016] Figure 2 It is a state diagram of buffering when the extension rod body of the present invention is extended.

[0017] Figure 3 It is a state diagram of buffering when the extended rod body of the present invention moves backward.

[0018] Reference numerals: 1 extending rod body, 2 cylinder body, 3 hydraulic port A, 4 hydraulic port B, 5 adjustable flow valve, 6 push rod, 7 front piston, 8 front positioning sleeve, 9 front air channel, 10 air push piston, 11 rear positioning sleeve, 12 rear air channel, 13 rear piston, 14 front air chamber, 15 gas port A, 16 gas port B, 17 front moving sleeve, 18 rear air chamber. DETAILED DESCRIPTION

[0019] The structure of the present invention is further described below. The gas-liquid buffer device of the present invention comprises an extension rod body 1 and a cylinder body 2. The front and rear ends of the cylinder body 2 are respectively provided with a hydraulic port A 3 and a hydraulic port B 4. The hydraulic port A 3 and the hydraulic port B 4 are respectively connected to hydraulic pipes and converge and communicate at an adjustable flow valve 5.

[0020] The cylinder body 2 includes a front end member, an intermediate metal tube and a rear end member, the hydraulic A port 3 and the hydraulic B port 4 are respectively opened on the front end member and the rear end member, a connecting plate is provided at the rear of the rear end member, and the mounting hole is opened on the intermediate metal tube.

[0021] The extension rod body is arranged in the cylinder body, and the extension rod body is extended at the front end position. 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 sleeve with a front piston 7 in the cylinder body 2. The front end of the cylinder body 2 is provided with a front positioning sleeve 8 at the rear end of the front piston 7. The front positioning sleeve 8 is provided with a front air channel 9. The front air channel 9 connects the outside of the cylinder body 2 and the middle position inside the cylinder body 2. An air push piston 10 is provided at the rear end of the extension rod body. A rear locating sleeve 11 is provided at the rear end of the cylinder body 2, and a rear end air passage 12 is provided inside the rear locating sleeve 11. The air passage connects the outside of the cylinder body 2 and the space in front of the rear locating sleeve at the rear end of the cylinder body 2. The push rod 6 passes through a through hole 17 in the middle of the rear locating sleeve 11. A rear end piston 13 is fixedly provided at the rear end of the push rod 6, and the rear end of the rear end piston 13 is connected to the hydraulic port B 4.

[0022] In this device, the inner cavity of the cylinder body 2 between the front positioning sleeve 8 and the air push piston 10 is the front air chamber 14. The front positioning sleeve 8 is provided with a gas A port 15 connected to the outside 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 outer diameter.

[0023] 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 sleeved on 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 front hydraulic chamber surrounded by the front piston 7, the extension rod and the cylinder 2 is connected to the hydraulic port A 3. The length of the front moving sleeve (17) leaking out of the front positioning sleeve is consistent with the length of the front piston (7) and the front end of the cylinder. When the air push piston moves forward to the rear end of the front moving sleeve 17, it pushes the front moving sleeve 17 forward, driving the front piston to squeeze the front hydraulic chamber.

[0024] The rear end piston 13, the rear end surface of the push rod 6, the cylinder body 2 and the hydraulic port B 4 form a rear hydraulic cavity. The space between the air push piston, the rear positioning sleeve 11 and the cylinder body 2 is a rear air chamber 18.

[0025] A stud is arranged at the front end of the extending rod body, and a connecting shaft is arranged on the stud. A pin hole is arranged at the front end of the connecting shaft and is connected to the buffer component through a pin shaft. The rear end of the extending rod body is connected to the push rod 6 through a threaded rod. The air push piston 10 is fixed at the connection. The outer diameter of the push rod 6 is larger than the outer diameter of the deep rod.

[0026] The cylinder body 2 is provided with mounting holes for mounting the front positioning sleeve 8 and the rear positioning sleeve 11. The outer peripheries of the two sets of positioning sleeves are provided with protruding holes embedded in the mounting holes. The gas A port 15 and the gas B port 16 leak out of the cylinder body 2 at the mounting hole positions.

[0027] When the device is used, during the forward buffering process, the extended rod body moves forward quickly under the pull of the external mechanism, the air enters the rear air chamber, and the gas is discharged from the air well A port of the middle cylinder structure. When the air push piston moves to the rear end of the front movable sleeve position, the front movable sleeve is pushed, the speed is reduced, and the hydraulic pressure in the front hydraulic chamber is squeezed by the front piston. The space between the front piston and the front positioning sleeve expands, presenting a negative pressure, which is pushed out through the hydraulic port A and enters the rear hydraulic chamber at the rear through the adjustable flow valve. The hydraulic pressure in the rear hydraulic chamber enters, squeezing the rear end piston forward, and the push rod moves forward at the rear positioning sleeve, and the gas in the cavity between the rear piston and the rear positioning sleeve is squeezed. The above process realizes hydraulic controllable flow by expanding and compressing the gas, thereby realizing the end buffering of the extended rod body.

[0028] Backward buffering, the extended rod body moves backward quickly under the pull of the external mechanism, the air in the rear air chamber is discharged through the rear airway, and the air in the middle cylinder structure enters at the gas port A. When the gas push piston moves to the front end of the push rod, the speed is reduced, pushing the push rod backward, and the rear piston squeezes the hydraulic pressure in the hydraulic chamber. The space between the rear piston and the rear positioning sleeve expands, showing negative pressure, and the hydraulic pressure is pushed out through the hydraulic port B, and enters the front hydraulic chamber at the front end through the adjustable flow valve. The hydraulic pressure in the front hydraulic chamber enters, squeezing the front piston backward, and the front moving sleeve push rod moves backward accordingly. The above process realizes hydraulic controllable flow by expanding and compressing the gas, and realizes the end buffering of the extended rod body.

Claims

1. A gas-liquid buffer device, comprising a protruding rod (1) and a cylinder (2), characterized in that: The front and rear ends of the cylinder body (2) are respectively provided with a hydraulic port A (3) and a hydraulic port B (4), and the hydraulic port A (3) and the hydraulic port B (4) are respectively connected to hydraulic pipes and are connected at an adjustable flow valve (5); A push rod (6) is provided at the rear end of the extension rod body (1) in the cylinder body (2). The extension rod body and the push rod are not connected. The extension rod body is provided with a sleeve having a front piston (7) in the cylinder body (2). A front positioning sleeve (8) is provided at the front end of the cylinder body (2) behind the front piston (7). A front air passage (9) is provided in the front positioning sleeve (8). The front air passage (9) is connected to the outside of the cylinder body (2) and the middle position inside the cylinder body (2). The rear end of the extended rod body is connected to a push rod (6), and a gas push piston (10) is provided at the connection position. A rear positioning sleeve (11) is provided at the rear end of the cylinder body (2). A rear air passage (12) is provided in the rear positioning sleeve (11) to connect the rear end of the cylinder body with the outside. The air passage connects the outside of the cylinder body (2) and the inside of the cylinder body (2). The push rod (6) passes through the middle through hole of the rear positioning sleeve (11). A rear piston (13) is fixedly provided at the rear end of the push rod (6). The rear end 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 movable sleeve (17). The front movable sleeve (17) has a through hole in the middle and is sleeved on the extension rod body. The rear end of the front movable sleeve (17) passes through the middle through hole of the front positioning sleeve (8) and is located between the extension rod body and the front positioning sleeve (8). The rear end of the front movable sleeve (17) leaks out of the front positioning sleeve.

2. The gas-liquid buffer device according to claim 1, characterized in that: The inner cavity of the cylinder body (2) between the front positioning sleeve (8) and the air 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) for communication with the outside world; and the rear positioning sleeve (11) is provided with a gas B port 16 for communication with the outside world.

3. The gas-liquid buffer device according to claim 1, characterized in that: The length of the front moving sleeve (17) leaking out of the front positioning sleeve is consistent with the length of the front piston (7) and the front end of the cylinder body, and the front hydraulic chamber surrounded by the front piston (7), the extended rod body and the cylinder body (2) is connected to the hydraulic port A (3).

4. The gas-liquid buffer device according to claim 1, characterized in that: The rear end piston (13), the rear end surface of the push rod (6), the cylinder body (2) and the hydraulic port B (4) form a rear hydraulic chamber.

5. The gas-liquid buffer device according to claim 1 is characterized in that the gas The space between the push piston, the rear positioning sleeve (11) and the cylinder body (2) is the rear air chamber (18).

6. The gas-liquid buffer device according to claim 1, characterized in that: A stud is arranged at the front end of the extension rod body, a connecting shaft is arranged on the stud, a pin hole is arranged at the front end of the connecting shaft and is connected to the buffer component through the pin, the rear end of the extension rod body is connected to the push rod (6) through a threaded rod, the air push piston (10) is fixed at the connection, and the outer diameter of the push rod (6) is larger than the outer diameter of the deep rod.

7. The gas-liquid buffer device according to claim 1, characterized in that: The cylinder body (2) is provided with mounting holes for mounting the front positioning sleeve (8) and the rear positioning sleeve (11). The outer circumferences of the two sets of positioning sleeves are provided with protruding holes which are embedded in the mounting holes. The gas A port (15) and the gas B port (16) leak out of the cylinder body (2) at the mounting hole positions.

8. The gas-liquid buffer device according to claim 7, characterized in that: The cylinder body (2) comprises a front end member, an intermediate metal tube and a rear end member, the hydraulic port A (3) and the hydraulic port B (4) are respectively provided on the front end member and the rear end member, a connecting plate is provided at the rear of the rear end member, and the mounting hole is provided on the intermediate metal tube.

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