Pneumatic stop valve capable of controlling flow speed

Abstract

The pneumatic stop valve capable of controlling the flow speed comprises a valve body, a water inlet cavity and a water outlet cavity are formed in the valve body, a valve port is formed in the intersection position of the water inlet cavity and the water outlet cavity, and the valve body is further connected with a pneumatic stop mechanism through a flange. When the driving air cylinder is withdrawn, flow speed limiting columns with different lengths can abut against the top of a connecting plate through rotation of a positioning disc, the connecting plate is limited, then the position of the valve plate is limited, the flow speed of the start stop valve is limited, and the flow speed of the start stop valve is limited; and meanwhile, various different flow speeds can be adjusted through rotation of the positioning disc, the requirements of users are further met, and the performance of the pneumatic stop valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic stop valves, in particular to a pneumatic stop valve with controllable flow rate. Background Art

[0002] The opening and closing member of a pneumatic globe valve is a plug-shaped disc with a flat or conical sealing surface. The disc moves linearly along the centerline of the fluid. The valve stem can be operated in two ways: a lifting stem (the stem rises and falls, but the handwheel does not) or a lifting and rotating stem (the handwheel rotates and rises together with the stem, and the nut is mounted on the valve body).

[0003] In the prior art, conventional pneumatic stop valves are only suitable for full opening and full closing, and cannot adjust the flow rate, thus failing to meet the needs of users. It is necessary to further improve its performance.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide a pneumatic stop valve with controllable flow rate to solve the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of the present utility model is to avoid the deficiencies of the prior art and provide a pneumatic stop valve with controllable flow rate. The pneumatic stop valve with controllable flow rate drives the output of the cylinder to push the connecting plate, thereby driving the valve stem and the valve plate to move to seal the valve port. When the driving cylinder is retracted, the rotation of the positioning disc can be used to abut flow rate limit columns of different lengths against the top of the connecting plate to limit the connecting plate, thereby limiting the position of the valve plate, thereby limiting the flow rate of the start-up stop valve. At the same time, the rotation of the positioning disc can also be used to adjust to a variety of different flow rates, further meeting the needs of users and improving the performance of the pneumatic stop valve.

[0006] The above-mentioned purpose of the present invention is achieved through the following technical means.

[0007] Provided is a pneumatic stop valve with controllable flow rate, comprising a valve body, wherein a water inlet cavity and a water outlet cavity are provided inside the valve body, a through valve port is provided at the intersection of the water inlet cavity and the water outlet cavity, and a pneumatic stop mechanism is further connected to the valve body by a flange;

[0008] The pneumatic shut-off mechanism includes an equipment housing, which is flange-connected to the valve body. A shut-off valve assembly is movably installed inside the equipment housing. A driving cylinder is also installed inside the equipment housing, and the output end of the driving cylinder is movably abutted against the top of the shut-off valve assembly. A flow rate adjustment assembly is also rotatably installed inside the equipment housing, and the flow rate adjustment assembly is also movably abutted against the top of the shut-off valve assembly.

[0009] Specifically, the flow rate adjustment assembly includes an adjustment rod rotatably mounted on the equipment housing, a limiting ring is installed around the outside of the adjustment rod, and a positioning block is also installed inside the equipment housing. The adjustment rod is rotatably mounted on the equipment housing through the limiting ring and the positioning block, and a positioning disc is also installed outside the adjustment rod. Several flow rate limiting columns of different lengths are installed around the bottom of the positioning disc, and the several flow rate limiting columns are all movably abutted against the stop valve assembly. The top of the adjustment rod extends to the top of the equipment housing and is fixedly mounted with an adjustment disc.

[0010] Preferably, the stop valve assembly includes a valve stem, which is movably mounted on the equipment housing. The bottom of the valve stem extends to the interior of the valve body and is fixedly mounted with a valve plate. The valve plate movably cooperates with the valve port. A connecting plate is fixedly mounted on the top of the valve stem. A reset spring is connected between the bottom of the connecting plate and the equipment housing. The top of the connecting plate is movably abutted against the flow rate limit column, the output end of the drive cylinder and the positioning disc.

[0011] Specifically, a top limit block is further installed inside the device housing, the bottom surface of the top limit block is at the same height as the bottom surface of the positioning disc, and the top limit block is also movably abutted against the top of the connecting plate.

[0012] The utility model drives the output of the cylinder to push the connecting plate, thereby driving the valve stem and the valve plate to move to seal the valve port. When the driving cylinder is retracted, the rotation of the positioning disc can be used to make flow rate limiting columns of different lengths abut against the top of the connecting plate, thereby limiting the connecting plate and then limiting the position of the valve plate, thereby realizing the limitation of the flow rate of the start-up stop valve. At the same time, the rotation of the positioning disc can also be used to adjust to a variety of different flow rates, further meeting the needs of users and improving the performance of the pneumatic stop valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0014] Figure 1 The utility model is a schematic diagram of the main structure of a pneumatic stop valve with controllable flow rate.

[0015] Figure 2 It is a three-dimensional structural schematic diagram of a flow rate regulating component of a pneumatic stop valve with controllable flow rate according to the present invention.

[0016] from Figures 1 to 2 Including:

[0017] 1. Valve body;

[0018] 2. Water inlet cavity;

[0019] 3. Water outlet cavity;

[0020] 4. Through the valve port;

[0021] 5. Equipment casing;

[0022] 6. Driving cylinder;

[0023] 7. Adjustment rod;

[0024] 8. Limiting ring;

[0025] 9. Positioning block;

[0026] 10. Positioning disc;

[0027] 11. Flow rate limit column;

[0028] 12. Adjustment dial;

[0029] 13. Valve stem;

[0030] 14. Valve plate;

[0031] 15. Connecting plate;

[0032] 16. Return spring;

[0033] 17. Top limit block. DETAILED DESCRIPTION

[0034] The present invention will be further described with reference to the following embodiments.

[0035] Example 1.

[0036] like Figure 1-2 As shown, a pneumatic stop valve with controllable flow rate is provided, which includes a valve body 1, a water inlet chamber 2 and a water outlet chamber 3 are provided inside the valve body 1, a valve port 4 is provided at the intersection of the water inlet chamber 2 and the water outlet chamber 3, and a pneumatic stop mechanism is also flange-connected on the valve body 1.

[0037] The present application is used for a pneumatic stop valve. First, liquid can enter the valve body 1 from the outside through the water inlet chamber 2 of the valve body 1. When the valve port 4 is opened, the liquid can flow out of the valve body 1 from the water outlet chamber 3. The valve port 4 can be blocked by a pneumatic stop mechanism, and the flow rate can be adjusted.

[0038] The pneumatic shut-off mechanism includes an equipment housing 5, which is flange-connected to the valve body 1. A shut-off valve assembly is movably installed inside the equipment housing 5. A driving cylinder 6 is also installed inside the equipment housing 5. The output end of the driving cylinder 6 is movably abutted against the top of the shut-off valve assembly. A flow rate adjustment assembly is also rotatably installed inside the equipment housing 5, and the flow rate adjustment assembly is also movably abutted against the top of the shut-off valve assembly.

[0039] The pneumatic shut-off mechanism is flange-connected to the valve body 1 through the equipment housing 5. The output of the driving cylinder 6 drives the shut-off valve assembly to block the valve port 4. At the same time, the flow rate adjustment assembly performs different limit abutments on the shut-off valve assembly above the shut-off valve assembly, thereby forming different height limits on the shut-off valve assembly to achieve flow rate adjustment of the liquid through the valve body 1.

[0040] The flow rate adjustment assembly includes an adjusting rod 7 rotatably mounted on the equipment housing 5, a limiting ring 8 is installed around the outside of the adjusting rod 7, and a positioning block 9 is also installed inside the equipment housing 5. The adjusting rod 7 is rotatably mounted on the equipment housing 5 through the limiting ring 8 and the positioning block 9, and a positioning disc 10 is also installed outside the adjusting rod 7. Several flow rate limiting columns 11 of different lengths are installed around the bottom of the positioning disc 10, and the several flow rate limiting columns 11 are all movably abutted against the stop valve assembly. The top of the adjusting rod 7 extends to the top of the equipment housing 5 and is fixedly mounted with an adjusting disc 12.

[0041] The flow rate adjustment assembly drives the positioning disc 10 to rotate through the rotation of the adjusting rod 7. The positioning disc 10 drives the flow rate limiting columns 11 of different lengths to movably abut against the top of the stop valve assembly, thereby realizing the height limitation of the stop valve assembly. The limiting rotation installation of the limiting ring 8 and the positioning block 9 can prevent the height of the adjusting rod 7 from changing, and the adjusting disc 12 is convenient for the operator to operate.

[0042] The stop valve assembly includes a valve stem 13, which is movably mounted on the equipment housing 5. The bottom of the valve stem 13 extends to the interior of the valve body 1 and is fixedly mounted with a valve plate 14. The valve plate 14 movably cooperates with the valve port 4. A connecting plate 15 is fixedly mounted on the top of the valve stem 13. A reset spring 16 is connected between the bottom of the connecting plate 15 and the equipment housing 5. The top of the connecting plate 15 is movably in contact with the flow rate limit column 11, the output end of the driving cylinder 6 and the positioning disc 10.

[0043] The stop valve assembly cooperates with the valve port 4 through the valve plate 14. The top of the valve plate 14 is lifted and lowered by the vertical movement of the valve stem 13. The top of the valve stem 13 is driven by the connecting plate 15. The return spring 16 between the connecting plate 15 and the equipment housing 5 enables the connecting plate 15 to drive the valve stem 13 and the valve plate 14 to generate an upward elastic force. When the valve plate 14 needs to be sealed downward through the valve port 4, the output of the driving cylinder 6 can be used. The top of the connecting plate 15 can be driven to move downward by the output of the driving cylinder 6, thereby causing the valve plate 14 to seal the valve port 4.

[0044] A top limit block 17 is further installed inside the device housing 5 . The bottom surface of the top limit block 17 is at the same height as the bottom surface of the positioning disc 10 . The top limit block 17 also movably abuts against the top of the connecting plate 15 .

[0045] The bottom surface of the top limit block 17 is the top limit height when the connecting plate 15 and the valve plate 14 are both at the highest position. The flow rate of this liquid is the largest. At the same time, the positioning disc 10 does not abut on the connecting plate 15 through the flow rate limit column 11. The positioning disc 10 is used to directly fit with the connecting plate 15 for limiting.

[0046] The utility model drives the output of the cylinder 6 to push the connecting plate 15, thereby driving the valve stem 13 and the valve plate 14 to move and block the valve port 4. When the driving cylinder 6 is retracted, the rotation of the positioning disc 10 can be used to make the flow rate limiting columns 11 of different lengths abut against the top of the connecting plate 15, thereby limiting the connecting plate 15 and further limiting the position of the valve plate 14, thereby realizing the limitation of the flow rate of the start-up stop valve. At the same time, the rotation of the positioning disc 10 can also be used to adjust to a variety of different flow rates, further meeting the needs of users and improving the performance of the pneumatic stop valve.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A pneumatic stop valve with controllable flow rate, characterized by: The valve comprises a valve body, wherein a water inlet cavity and a water outlet cavity are provided inside the valve body, a valve port is provided at the intersection of the water inlet cavity and the water outlet cavity, and a pneumatic shut-off mechanism is also connected to the valve body by a flange; The pneumatic cut-off mechanism includes an equipment housing, which is flange-connected to the valve body. A cut-off valve assembly is movably installed inside the equipment housing. A driving cylinder is also installed inside the equipment housing, and the output end of the driving cylinder is movably abutted against the top of the cut-off valve assembly. A flow rate adjustment assembly is also rotatably installed inside the equipment housing, and the flow rate adjustment assembly is also movably abutted against the top of the cut-off valve assembly.

2. A pneumatic stop valve with controllable flow rate according to claim 1, characterized in that: The flow rate adjustment assembly includes an adjustment rod rotatably mounted on the device housing, a limiting ring is installed around the outside of the adjustment rod, a positioning block is also installed inside the device housing, the adjustment rod is rotationally mounted on the device housing through the limiting ring and the positioning block, a positioning disc is also installed outside the adjustment rod, and a plurality of flow rate limiting columns of different lengths are installed around the bottom of the positioning disc, and the plurality of flow rate limiting columns are movably abutted against the stop valve assembly, and the top of the adjustment rod extends to the top of the device housing and is fixedly mounted with an adjustment disc.

3. The flow rate controllable pneumatic stop valve according to claim 2, characterized in that: The stop valve assembly includes a valve stem, which is movably mounted on the equipment housing. The bottom of the valve stem extends to the interior of the valve body where a valve plate is fixedly mounted. The top of the valve stem is fixedly mounted with a connecting plate. A return spring is connected between the bottom of the connecting plate and the equipment housing. The top of the connecting plate is movably in contact with the flow rate limit column, the output end of the driving cylinder and the positioning disc.

4. The flow rate controllable pneumatic stop valve according to claim 3, characterized in that: A top limiting block is further installed inside the device housing. The bottom surface of the top limiting block is at the same height as the bottom surface of the positioning disc. The top limiting block is also movably abutted against the top of the connecting plate.

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