CN216044727U

CN216044727U - Buffering oil cylinder for pneumatic quick cut-off valve single-action pneumatic device

Info

Publication number: CN216044727U
Application number: CN202121855975.4U
Authority: CN
Inventors: 赵庆辉; 刘会良
Original assignee: Hebei Changhong Valve Co ltd
Current assignee: Hebei Changhong Valve Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-03-15
Anticipated expiration: 2031-08-10

Abstract

The utility model belongs to the technical field of oil cylinders, and particularly relates to a buffering oil cylinder for a pneumatic quick cut-off valve single-action pneumatic device, which comprises a front cylinder head, a cylinder body, a rear cylinder head and a piston rod; one end of the cylinder body is fixedly connected with the front cylinder head, and the other end of the cylinder body is fixedly connected with the rear cylinder head; a piston is connected inside the cylinder body in a sliding manner; one end of the piston rod is connected with the piston, and the other end of the piston rod is arranged outside the cylinder body; the piston rod consists of a first rod, a second rod and a rectangular block; the first rod penetrates through and is fixedly connected with the piston; one side of the rectangular block is fixedly connected with the first rod, and the other side of the rectangular block is fixedly connected with the second rod; four surfaces of the rectangular block, which are not in contact with the first rod and the second rod, are respectively provided with a first hole; the four first holes are communicated; one end of the first rod is provided with a second hole; the first hole is communicated with the second hole; the valve plate can be quickly closed and can be prevented from being stuck.

Description

Buffering oil cylinder for pneumatic quick cut-off valve single-action pneumatic device

Technical Field

The utility model belongs to the technical field of oil cylinders, and particularly relates to a buffering oil cylinder for a pneumatic quick cut-off valve single-action pneumatic device.

Background

The pneumatic quick cut-off valve is used for a gas pipeline, the single-action pneumatic device is ventilated, the compression spring stores energy, the valve is opened, and when power failure or air source disconnection occurs, the spring pushes the piston rod to drive the valve plate to be quickly closed.

The closing speed of the valve is very fast, generally 0.5-1 s, and when the closing speed of the valve is too fast, the valve plate is easy to be stuck with the valve seat, so that the valve cannot be opened when the valve needs to be opened; therefore, the utility model provides a buffering oil cylinder for a single-action pneumatic device of a pneumatic quick cut-off valve.

SUMMERY OF THE UTILITY MODEL

In order to make up for the defects of the prior art and solve the problem that when the closing speed of the valve is too high, the valve plate is easy to be stuck with the valve seat, so that the valve cannot be opened when the valve needs to be opened, the utility model provides the buffer oil cylinder for the single-action pneumatic device of the pneumatic quick cut-off valve.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model relates to a buffering oil cylinder for a single-action pneumatic device of a pneumatic quick cut-off valve, which comprises a front cylinder head, a cylinder body, a rear cylinder head and a piston rod, wherein the front cylinder head is connected with the cylinder body; one end of the cylinder body is fixedly connected with the front cylinder head, and the other end of the cylinder body is fixedly connected with the rear cylinder head; a piston is connected inside the cylinder body in a sliding manner; one end of the piston rod is connected with the piston, and the other end of the piston rod is arranged outside the cylinder body; the piston rod consists of a first rod, a second rod and a rectangular block; the first rod penetrates through and is fixedly connected with the piston; one side of the rectangular block is fixedly connected with the first rod, and the other side of the rectangular block is fixedly connected with the second rod; four surfaces of the rectangular block, which are not in contact with the first rod and the second rod, are respectively provided with a first hole; the four first holes are communicated; one end of the first rod is provided with a second hole; the first hole is communicated with the second hole; a buffer rod is connected in the rear cylinder head in a sliding manner, and the buffer rod is in sliding fit with the second hole; a third hole is formed in the surface of the buffer rod and is L-shaped; the buffer rod has the buffering effect, the buffer rod is adjusted to move left and right, the third hole can be semi-covered, and the flowing speed of hydraulic oil during buffering can be adjusted.

Furthermore, a square flange is fixedly connected to one side of the front cylinder head; a first sealing ring is arranged between the front cylinder head and the square flange.

Furthermore, the square flange is provided with the O shape sealing washer No. one with No. two pole contact departments.

Furthermore, the outer wall of the piston is provided with two annular grooves; and a second O-shaped sealing ring is arranged in the annular groove.

Furthermore, one side of the piston, which is close to the rectangular block, is provided with a groove; the rectangular block is fixedly connected in the groove.

Further, the top of the rear cylinder body is connected with an air bag type energy accumulator through a pipeline, and the air bag type energy accumulator is communicated with the inside of the cylinder body; the air bag type energy accumulator can balance the capacity difference of the left cavity and the right cavity of the buffer oil cylinder.

The utility model has the following beneficial effects:

1. according to the buffer oil cylinder for the single-action pneumatic device of the pneumatic quick cut-off valve, the front cylinder head, the cylinder body, the rear cylinder head, the piston rod, the piston, the first rod, the second rod, the rectangular block, the first hole, the second hole, the buffer rod and the third hole are matched for use, when the valve plate is quickly closed to 85 degrees, the speed begins to buffer (can be adjusted for 1-2 s), the valve plate can be quickly closed (about 95% of the stroke), and the valve plate can be prevented from being clamped.

2. According to the buffer oil cylinder for the single-action pneumatic device of the pneumatic quick cut-off valve, the first hole and the second hole are matched for use, when the valve is quickly closed, hydraulic oil in the right cavity of the buffer oil cylinder enters the left cavity through the main second hole and the first hole, and the quick closing speed of the valve is not influenced; through the cooperation use of buffer beam and No. two poles, when the piston reachd the buffering position, the opening part in buffer beam stifled No. two holes, hydraulic oil flowed into buffer cylinder's left chamber through No. three holes, No. two holes and a hole, and then realized the effect of buffering, controlled through adjusting the buffer beam and removed, can cover No. three holes, and then speed when adjustable buffering.

Drawings

The utility model will be further explained with reference to the drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

FIG. 4 is a schematic structural view of the cushion cylinder used in cooperation with the single-acting pneumatic device body in the present invention;

in the figure: 1. a front cylinder head; 2. a cylinder body; 3. a rear cylinder head; 4. a piston rod; 5. a piston; 41. a first rod; 42. a second rod; 43. a rectangular block; 6. a first hole; 7. a second hole; 8. a buffer rod; 9. a third hole; 10. a square flange; 11. a first sealing ring; 12. a first O-shaped sealing ring; 14. a second O-shaped sealing ring; 15. a groove; 16. a gas-bag accumulator; 17. a pipeline; 18. a single-acting pneumatic device body; 19. buffer cylinder.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

As shown in fig. 1 to 4, the buffer oil cylinder for the single-acting pneumatic device of the pneumatic quick cut-off valve comprises a front cylinder head 1, a cylinder body 2, a rear cylinder head 3 and a piston rod 4; one end of the cylinder body 2 is fixedly connected with the front cylinder head 1, and the other end of the cylinder body is fixedly connected with the rear cylinder head 3; a piston 5 is connected inside the cylinder body 2 in a sliding manner; one end of the piston rod 4 is connected with the piston 5, and the other end of the piston rod is arranged outside the cylinder body 2; the piston rod 4 consists of a first rod 41, a second rod 42 and a rectangular block 43; the first rod 41 penetrates through and is fixedly connected to the piston 5; one side of the rectangular block 43 is fixedly connected with the first rod 41, and the other side of the rectangular block is fixedly connected with the second rod 42; the four surfaces of the rectangular block 43, which are not contacted with the first rod 41 and the second rod 42, are respectively provided with a first hole 6; the four first holes 6 are communicated; one end of the first rod 41 is provided with a second hole 7; the first hole 6 is communicated with the second hole 7; the rear cylinder head 3 is internally and slidably connected with a buffer rod 8, and the buffer rod 8 is in sliding fit with the second hole 7; a third hole 9 is formed in the surface of the buffer rod 8, and the third hole 9 is L-shaped; when the pneumatic quick cut-off valve needs to be opened, firstly, the single-action pneumatic device body 18 is ventilated, so that the piston 5 of the single-action pneumatic device body 18 drives the piston rod 4 of the buffer oil cylinder 19 to extend out of the cylinder body 2, hydraulic oil in the left cavity of the buffer oil cylinder 19 flows to the right cavity through the four first holes 6 on the piston rod 4, and meanwhile, a spring in the single-action pneumatic device body 18 is compressed; when the pneumatic quick cut-off valve needs to be quickly closed, firstly, the single-action pneumatic device body 18 is quickly exhausted, so that the spring in the single-action pneumatic device body 18 releases energy, the piston rod 4 of the buffer oil cylinder 19 retracts, hydraulic oil in the right cavity of the buffer oil cylinder 19 flows to the left cavity through the four first holes 6 on the piston rod 4, and the closing speed of the single-action pneumatic device body 18 is not influenced due to the fact that the passage is large enough; when the valve of pneumatic quick cut-off valve was closed to about 85, buffer rod 8 inserted No. two hole 7, had plugged up 4 main oil circuit of buffer cylinder 19 piston rod, No. two hole 7 can only be flowed into through No. three hole 9 on the buffer rod 8 to hydraulic oil, flow to the left chamber of buffer cylinder 19 from No. one hole 6 again, and then realize that the valve is closed, have the effect of buffering, remove about through adjusting buffer rod 8, can partly cover No. three hole 9, and then the flow velocity of hydraulic oil during adjustable buffering.

A square flange 10 is fixedly connected to one side of the front cylinder head 1; a first sealing ring 11 is arranged between the front cylinder head 1 and the square flange 10; a first O-shaped sealing ring 12 is arranged at the contact position of the square flange 10 and the second rod 42; the outer wall of the piston 5 is provided with two annular grooves; a second O-shaped sealing ring 14 is arranged in the annular groove; one side of the piston 5 close to the rectangular block 43 is provided with a groove 15; the rectangular block 43 is fixedly connected in the groove 15; the top of the rear cylinder body 2 is connected with an air bag type energy accumulator 16 through a pipeline 17, and the air bag type energy accumulator 16 is communicated with the inside of the cylinder body 2; the air bag type energy accumulator 16 can balance the capacity difference of the left cavity and the right cavity of the buffer oil cylinder 19.

The working principle is as follows: when the pneumatic quick cut-off valve needs to be opened, firstly, the single-action pneumatic device body 18 is ventilated, so that the piston 5 of the single-action pneumatic device body 18 drives the piston rod 4 of the buffer oil cylinder 19 to extend out of the cylinder body 2, hydraulic oil in the left cavity of the buffer oil cylinder 19 flows to the right cavity through the four first holes 6 on the piston rod 4, and meanwhile, a spring in the single-action pneumatic device body 18 is compressed; when the pneumatic quick cut-off valve needs to be quickly closed, firstly, the single-action pneumatic device body 18 is quickly exhausted, so that the spring in the single-action pneumatic device body 18 releases energy, the piston rod 4 of the buffer oil cylinder 19 retracts, hydraulic oil in the right cavity of the buffer oil cylinder 19 flows to the left cavity through the four first holes 6 on the piston rod 4, and the closing speed of the single-action pneumatic device body 18 is not influenced due to the fact that the passage is large enough; when the valve of pneumatic quick cut-off valve was closed to about 85, buffer rod 8 inserted No. two hole 7, had plugged up 4 main oil circuit of buffer cylinder 19 piston rod, No. two hole 7 can only be flowed into through No. three hole 9 on the buffer rod 8 to hydraulic oil, flow to the left chamber of buffer cylinder 19 from No. one hole 6 again, and then realize that the valve is closed, have the effect of buffering, remove about through adjusting buffer rod 8, can partly cover No. three hole 9, and then the flow velocity of hydraulic oil during adjustable buffering.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a pneumatic quick cut-off valve single action buffer cylinder for pneumatic means which characterized in that: comprises a front cylinder head (1), a cylinder body (2), a rear cylinder head (3) and a piston rod (4); one end of the cylinder body (2) is fixedly connected with the front cylinder head (1), and the other end of the cylinder body is fixedly connected with the rear cylinder head (3); a piston (5) is connected in the cylinder body (2) in a sliding manner; one end of the piston rod (4) is connected with the piston (5), and the other end of the piston rod is arranged outside the cylinder body (2); the piston rod (4) consists of a first rod (41), a second rod (42) and a rectangular block (43); the first rod (41) penetrates through and is fixedly connected with the piston (5); one side of the rectangular block (43) is fixedly connected with the first rod (41), and the other side of the rectangular block is fixedly connected with the second rod (42); four surfaces of the rectangular block (43), which are not in contact with the first rod (41) and the second rod (42), are respectively provided with a first hole (6), and the four first holes (6) are in a communicated state; one end of the first rod (41) is provided with a second hole (7); the first hole (6) is communicated with the second hole (7); the rear cylinder head (3) is connected with a buffer rod (8) in a sliding mode, and the buffer rod (8) is in sliding fit with the second hole (7); no. three holes (9) are formed in the surface of the buffer rod (8), and the No. three holes (9) are L-shaped.

2. The buffer oil cylinder for the pneumatic quick cut-off valve single-action pneumatic device according to claim 1, characterized in that: a square flange (10) is fixedly connected to one side of the front cylinder head (1); a first sealing ring (11) is arranged between the front cylinder head (1) and the square flange (10).

3. The buffer oil cylinder for the pneumatic quick cut-off valve single-action pneumatic device according to claim 2, characterized in that: and a first O-shaped sealing ring (12) is arranged at the contact position of the square flange (10) and the second rod (42).

4. The pneumatic quick cut-off valve buffering oil cylinder for the single-acting pneumatic device of claim 3, characterized in that: the outer wall of the piston (5) is provided with two annular grooves; and a second O-shaped sealing ring (14) is arranged in the annular groove.

5. The pneumatic quick cut-off valve buffering oil cylinder for the single-acting pneumatic device is characterized in that: one side of the piston (5) close to the rectangular block (43) is provided with a groove (15); the rectangular block (43) is fixedly connected in the groove (15).

6. The buffer oil cylinder for the pneumatic quick cut-off valve single-action pneumatic device according to claim 5, characterized in that: the top of the rear cylinder head (3) is connected with an air bag type energy accumulator (16) through a pipeline (17), and the air bag type energy accumulator (16) is communicated with the interior of the cylinder body (2).