Zero-leakage pneumatic injection valve

Abstract

The utility model discloses a zero-leakage pneumatic injection valve which comprises a valve body and a valve seat arranged at a bottom blanking port, an inlet flange is arranged above the valve body, and a valve plate is arranged at the blanking port in the valve body; a rotating shaft which is parallel to the blanking port and rotates along the valve body is arranged in the valve body, the valve plate is arranged on the rotating shaft through a second crank, a first crank is arranged on the rotating shaft extending out of the valve body, a cylinder is arranged on the outer side of the valve body through a cylinder bracket, and the end part of a telescopic rod of the cylinder is connected with the free end of the first crank; a sealing mechanism is movably arranged on the peripheral side of the valve plate; an access hole is formed in the side end of the valve body, and an access door is arranged on the access hole. Pneumatic driving is adopted, the response speed is increased, accurate flow control can be achieved, an adjustable sealing structure is arranged between the valve plate and the valve seat, a sealing gap can be automatically compensated, therefore, the sealing performance of the valve is improved, and the service life of the injection valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to ejector valve technical field more particularly to a zero leakage pneumatic ejector valve. BACKGROUND

[0002] Ejector valve is a kind of special valve device, it is usually used in industrial field, especially in the occasion needing to eject fluid or gas, the working principle of ejector valve is when high-pressure fluid passes through the nozzle of ejector valve, flow rate increases, pressure reduces, thereby forming negative pressure zone around the nozzle, this negative pressure zone can suck low-pressure fluid or gas, makes it and high-pressure fluid fully mix in mixing chamber, by adjusting the diameter, shape of nozzle and opening degree of valve core, can control the ejector flow and mixing ratio.

[0003] At present, the ejector valve on the market is mostly hydraulic ejector valve, and its hydraulic system includes oil pump, oil tank, filter, pipeline and the like, requires larger installation space, and higher initial investment cost.Because hydraulic oil is greatly influenced by temperature, needs to replace special oil or cooling / heating measures under high-temperature or low-temperature environment.

[0004] And due to the structural characteristics of hydraulic ejector valve, sealing rubber ring and valve plate are detachably fastened and connected, and are in compression sealing structure with valve body valve seat, when ejector valve is used in the pipeline of coal gas medium, after a period of use, may cause sealing seat position to deviate or wear gap, causes valve sealing failure, finally leads to the whole pipeline unable to continue to work, even stops production to maintain equipment. UTILITY MODEL CONTENTS

[0005] The utility model needs to solve the technical problem to provide a zero leakage pneumatic ejector valve, improves the sealing effect of ejector valve, and then prolongs the service life of ejector valve.

[0006] To solve the above technical problem, the technical scheme adopted by the utility model is as follows.

[0007] A zero leakage pneumatic ejector valve, including valve body and the valve seat that sets at bottom blanking port, the top of valve body is provided with inlet flange, and the blanking port in the inside of valve body is provided with the valve plate for opening and closing valve;The inside of the valve body is provided with the rotating shaft parallel with blanking port and along the valve body, and the valve plate is arranged on the rotating shaft through the second crank, and the rotating shaft that extends out of the valve body is provided with the first crank, and the outer side of the valve body is provided with the air cylinder for driving the rotation of the first crank through the air cylinder support, and the end of the air cylinder telescopic rod is connected with the free end of the first crank;The periphery of the valve plate is movably provided with the sealing mechanism for improving the sealing performance between the valve plate and the valve seat;The side end of the valve body is provided with the access hole, and the access door is arranged on the access hole.

[0008] Further optimize technical scheme, the sealing mechanism includes the valve body panel that is movably arranged in the valve plate side, the edge of valve body panel is provided with sealing rubber ring, the adjusting screw for adjusting the position of sealing rubber ring is arranged between valve body panel and valve plate.

[0009] Further optimize technical scheme, the discharge port of the contact surface between the valve seat and the valve plate is the inclined taper structure of wide top and narrow bottom, the structure of the valve body panel on the valve body is matched with the inclined taper contact surface.

[0010] Further optimize technical scheme, the middle part of the inclined taper contact surface of the valve seat is provided with a groove, and the sealing rubber ring on the valve plate extends into the groove.

[0011] Further optimize technical scheme, the outer side of the valve body is provided with a mounting plate, the access door is hinged to the mounting plate through a connecting plate, and a bolt fastener for fixing the access door on the valve body is arranged between the access door and the valve body.

[0012] Further optimize technical scheme, the outer side of the access door is provided with a handle facilitating opening of the access door.

[0013] Due to the adoption of the above technical scheme, the technical progress achieved by the utility model is as follows.

[0014] The zero-leakage pneumatic ejection valve provided by the utility model adopts pneumatic driving, improves response speed, can realize precise flow control, and is provided with an adjustable sealing structure between the valve plate and the valve seat, can automatically compensate the sealing gap, thereby improving the sealing performance of the valve, and prolonging the service life of the ejection valve. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the utility model;

[0016] Figure 2 It is an internal structural schematic view of the utility model;

[0017] Figure 3 It is the utility model Figure 2 It is an enlarged structural schematic view of A in the figure.

[0018] Wherein: 1. valve body, 2. inlet flange, 3. mounting plate, 4. access door, 5. connecting plate, 6. handle, 7. bolt fastener, 8. cylinder support, 9. cylinder, 10. rotating shaft, 11. first crank, 12. second crank, 13. valve plate, 14. valve seat, 15. adjusting screw, 16. groove, 17. sealing rubber ring, 18. valve plate panel. DETAILED DESCRIPTION

[0019] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0020] A zero-leakage pneumatic ejector valve, combined with Figures 1 to 3 As shown, it includes a valve body 1 and a valve seat 14 located at the bottom of the valve body 1. An inlet flange 2 is provided on the top of the valve body 1, and a valve plate 13 is provided at the bottom of the valve body 1 for opening and closing the valve.

[0021] A rotating shaft 10 is provided inside the valve body 1. The rotating shaft 10 is parallel to the material inlet and rotates along the valve body. The valve plate 13 is mounted on the rotating shaft 10 via a second crank 12. A first crank 11 is mounted on the rotating shaft 10 extending out of the valve body 1. A cylinder 9 is mounted on the outside of the valve body 1 via a cylinder bracket 8. The end of the cylinder extension rod is connected to the free end of the first crank 11 to drive the first crank to rotate. The rotation of the first crank drives the rotating shaft to rotate, and the rotation of the rotating shaft drives the second crank to rotate. The second crank drives the valve plate to move up and down, realizing the opening and closing of the invention. The pneumatic drive improves the response speed and enables precise flow control.

[0022] A sealing mechanism is movably provided on the periphery of the valve plate 13 to improve the sealing performance between the valve plate 13 and the valve seat 14.

[0023] The sealing mechanism includes a valve body panel 18 disposed around the valve plate 13. A sealing ring 17 is provided along the edge of the valve body panel 18. An adjusting screw 15 is provided between the valve body panel 18 and the valve plate 13 to adjust the position of the sealing ring, thereby improving the sealing performance. The outlet of the valve seat 14 at the contact surface with the valve plate 13 has a tapered structure that is wider at the top and narrower at the bottom. The structure of the valve body panel 18 on the valve body 13 matches the tapered contact surface. An annular groove 16 is formed in the middle of the tapered contact surface of the valve seat 14. The sealing ring 17 on the valve plate 13 extends into the groove 16, thereby improving the sealing performance between the valve plate and the valve seat. When the valve plate is opened and closed for a long time, wear of the sealing ring may cause a poor seal between the valve plate and the valve seat. The upper and lower positions of the sealing ring can be adjusted by adjusting the screw to improve the sealing performance between the valve plate and the valve seat, thereby extending the service life of the valve.

[0024] The valve body 1 has an inspection port on its side for internal inspection. An inspection door 4 is provided on the inspection port. An installation plate 3 is provided on the outside of the valve body 1. The inspection door 4 is hinged to the installation plate 3 by a connecting plate 5. Bolt fasteners 7 are provided between the inspection door 4 and the valve body 1 to fix the inspection door to the valve body. A handle 6 is provided on the outside of the inspection door 4 for easy opening.

[0025] The utility model discloses a valve body, the first crank, the second crank, the valve plate and the adjusting screw are arranged in the valve body, the first crank is arranged on the valve body, the second crank is arranged in the valve body, the valve plate is arranged in the valve body, the adjusting screw is arranged in the valve body, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected with the valve plate, the first crank is connected with the adjusting screw, the second crank is connected with the valve plate, the adjusting screw is connected

Claims

1. A zero-leakage pneumatic ejector valve, characterized in that: The valve body (1) includes a valve body (1) and a valve seat (14) located at the bottom discharge port. An inlet flange (2) is provided on the top of the valve body (1). A valve plate (13) for opening and closing the valve is provided at the discharge port inside the valve body (1). A rotating shaft (10) parallel to the discharge port and rotating along the valve body (1) is provided inside the valve body (1). The valve plate (13) is mounted on the rotating shaft (10) via a second crank (12). A first crank (11) is provided on the rotating shaft (10) extending out of the valve body (1). A cylinder (9) for driving the first crank (11) to rotate is provided on the outside of the valve body (1) via a cylinder bracket (8). The end of the cylinder extension rod is connected to the free end of the first crank. A sealing mechanism for improving the sealing performance between the valve plate (13) and the valve seat (14) is movably provided on the periphery of the valve plate (13). An inspection port is provided on the side of the valve body (1), and an inspection door (4) is provided on the inspection port.

2. The zero-leakage pneumatic ejector valve according to claim 1, characterized in that: The sealing mechanism includes a valve body panel (18) movably disposed around the valve plate (13), a sealing ring (17) is provided on the edge of the valve body panel (18), and an adjusting screw (15) for adjusting the position of the sealing ring is provided between the valve body panel (18) and the valve plate (13).

3. A zero-leakage pneumatic ejector valve according to claim 2, characterized in that: The outlet of the contact surface between the valve seat (14) and the valve plate (13) is a tapered structure that is wider at the top and narrower at the bottom. The structure of the valve body panel (18) on the valve body (13) is matched with the tapered contact surface.

4. A zero-leakage pneumatic ejector valve according to claim 3, characterized in that: The valve seat (14) has a groove (16) in the middle of the oblique conical contact surface, and the sealing ring (17) on the valve plate (13) extends into the groove (16).

5. A zero-leakage pneumatic ejector valve according to claim 1, characterized in that: An installation plate (3) is provided on the outside of the valve body (1). The inspection door (4) is hinged to the installation plate (3) via a connecting plate (5). A bolt fastener (7) for fixing the inspection door to the valve body is provided between the inspection door (4) and the valve body (1).

6. A zero-leakage pneumatic ejector valve according to claim 1, characterized in that: The outside of the inspection door (4) is provided with a handle (6) to facilitate opening the inspection door.

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