Anti-corrosion butterfly valve

Abstract

The utility model relates to the technical field of anti-corrosion butterfly valves, in particular to an anti-corrosion butterfly valve which is characterized in that a valve rod is arranged in the middle of a butterfly valve body, a rotating disc is arranged at the top of the valve rod, the valve rod extends out of the top of the butterfly valve body, a cavity is formed in the top of the valve rod, and first telescopic grooves are formed in the positions, on the two sides of the cavity, of the valve rod; an extrusion plate is inserted into the first telescopic groove, the top of the extrusion plate extends out of the top of the rotating disc to be connected with a pressing plate, and a first spring is connected between the pressing plate and the rotating disc; the anti-corrosion butterfly valve has the beneficial effects that after adjustment is completed, the pressing plate is loosened and pressed, at the moment, the pressing plate is rebounded through tension of a first spring barrel at the bottom of the pressing plate, and an extrusion plate at the bottom of the pressing plate is made to break away from extrusion on an ejection block; and a second spring connected to the rear end of the jacking block drives the jacking block to contract into a second telescopic groove through contraction force, extrusion on a contraction plate is canceled, and the contraction plate drives an insertion rod at the bottom to extend out of a cavity through tension of a third spring.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-corrosion butterfly valves, in particular to an anti-corrosion butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for on-off control of low-pressure pipeline media. A butterfly valve refers to a valve whose closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] In the prior art, butterfly valves are often used to control and adjust the flow rate of liquids during the transportation of liquids. By adjusting the valves, the flow of various types of fluids such as liquids, muds, oils, liquid metals and radioactive media can be controlled.

[0004] However, the existing butterfly valve has no locking mechanism, which causes the working position of the valve plate to be easily changed during use, affecting the device's regulation of the medium. Utility Model Content

[0005] The purpose of the present utility model is to provide an anti-corrosion butterfly valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a valve stem is provided in the middle part of the butterfly valve body, a turntable is provided on the top of the valve stem, the valve stem extends from the top of the butterfly valve body, a cavity is provided inside the top of the valve stem, the valve stem is provided with a first telescopic groove on both sides of the cavity, an extrusion plate is inserted in the first telescopic groove, the top of the extrusion plate extends from the top of the turntable and is connected to the pressure plate, and a first spring is connected between the pressure plate and the turntable.

[0007] Preferably, the bottom of the valve stem is inserted into the interior of the butterfly valve body, and a disc plate is provided at the bottom end of the valve stem. By rotating the turntable, the valve stem can drive the disc plate to rotate to control the flow rate of the liquid.

[0008] Preferably, the valve stem is provided with a second telescopic groove in the middle of the retraction plate, the top of the second telescopic groove is communicated with the first telescopic groove, a second spring is provided in the second telescopic groove, the inner side of the second spring is connected to the top holding block, and the extrusion plate in the first telescopic groove can extrude the arc surface of the top holding block so that the top holding block extends from the second spring.

[0009] Preferably, the outer side of the bottom end of the retracting plate is connected to the plug rod, and the butterfly valve body has multiple groups of slots parallel to the slots around the valve stem. The plug rods can extend from the cavity and be inserted into the slots to lock the rotation of the valve stem.

[0010] Preferably, the inner middle portion of the retractable plate is connected to a third spring, which connects the two groups of retractable plates. The supporting block can squeeze the retractable plate, so that the retractable plate drives the insertion rod to retract into the cavity.

[0011] Preferably, an anti-corrosion layer is provided on the inner wall of the butterfly valve body, and the anti-corrosion layer can make the butterfly valve body have good corrosion resistance.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model provides an anti-corrosion butterfly valve. When the adjustment is completed, the pressing plate is released. At this time, the tension of the first spring tube at the bottom of the pressure plate rebounds the pressure plate, and the extrusion plate at the bottom of the pressure plate is separated from the extrusion of the top holding block. The second spring connected to the rear end of the top holding block drives the top holding block to shrink into the second telescopic groove through the contraction force, canceling the extrusion of the contraction plate, so that the contraction plate drives the bottom insertion rod to extend from the cavity through the tension of the third spring and is inserted into the corresponding slot, thereby locking the valve stem again. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model

[0017] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0018] Figure 5 This is another cross-sectional structural diagram of the present invention.

[0019] In the figure: butterfly valve body 1, anti-corrosion layer 2, valve stem 3, turntable 4, first spring 5, pressure plate 6, extrusion plate 7, first telescopic groove 8, cavity 9, contraction plate 10, slot 11, insertion rod 12, disc plate 13, second telescopic groove 14, second spring 15, top holding block 16, third spring 17. DETAILED DESCRIPTION

[0020] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 5The utility model provides a technical solution: a valve stem 3 is provided in the middle of the butterfly valve body 1, a turntable 4 is provided on the top of the valve stem 3, the valve stem 3 extends from the top of the butterfly valve body 1, and a cavity 9 is opened inside the top of the valve stem 3. The valve stem 3 is provided with a first telescopic groove 8 on both sides of the cavity 9, and an extrusion plate 7 is inserted in the first telescopic groove 8. The top of the extrusion plate 7 extends from the top of the turntable 4 and is connected to the pressure plate 6. A first spring 5 is connected between the pressure plate 6 and the turntable 4; the bottom of the valve stem 3 is inserted into the interior of the butterfly valve body 1, and a disc plate 13 is provided at the bottom end of the valve stem 3. By rotating the turntable 4, the valve stem 3 can drive the disc plate 13 to rotate to control the flow rate of the liquid; a second telescopic groove 14 is opened in the middle of the contraction plate 10 of the valve stem 3, and the top of the second telescopic groove 14 is communicated with the first telescopic groove 8. A second spring 15 is provided in the middle, and the inner side of the second spring 15 is connected to the supporting block 16. The extrusion plate 7 in the first telescopic groove 8 can squeeze the arc surface of the supporting block 16, so that the supporting block 16 extends from the second spring 15; the outer side of the bottom end of the contraction plate 10 is connected to the plug rod 12, and the butterfly valve body 1 is provided with multiple groups of slots 11 around the valve stem 3 and parallel to the slots 11. The plug rod 12 can extend from the cavity 9 and be inserted into the slots 11 to lock the rotation of the valve stem 3; the middle part of the inner side of the contraction plate 10 is connected to the third spring 17, and the third spring 17 connects the two groups of contraction plates 10. The supporting block 16 can squeeze the contraction plate 10, so that the contraction plate 10 drives the plug rod 12 to retract into the cavity 9; an anti-corrosion layer 2 is provided on the inner wall of the butterfly valve body 1, and the anti-corrosion layer 2 can make the butterfly valve body 1 have good corrosion resistance.

[0022] In actual use, when the liquid flow rate is controlled, the pressing plate 6 is first pressed to make the extrusion plate 7 connected to the bottom of the pressing plate 6 drop in the first telescopic groove 8, and inserted into the second telescopic groove 14 to squeeze the arc surface of the top holding block 16, so that the top holding block 16 pops out from the second telescopic groove 14, and squeezes the middle part of the contraction plate 10, so that the contraction plate 10 drives the insertion rod 12 set at the bottom end to shrink into the cavity 9, canceling the lock on the valve stem 3, and then rotating the valve stem 3 by rotating the turntable 4, so that the disc plate 13 at the bottom end of the valve stem 3 presses the liquid inside the butterfly valve body 1 The flow rate of the body is adjusted. When the adjustment is completed, the pressing plate 6 is released. At this time, the tension of the first spring 5 at the bottom of the pressing plate 6 rebounds the pressing plate 6, and the extrusion plate 7 at the bottom of the pressing plate 6 is separated from the extrusion of the top holding block 16. The second spring 15 connected to the rear end of the top holding block 16 drives the top holding block 16 to shrink into the second telescopic groove 14 through the contraction force, canceling the extrusion of the contraction plate 10, so that the contraction plate 10 drives the bottom insertion rod 12 out of the cavity 9 through the tension of the third spring 17, and is inserted into the corresponding slot 11, locking the valve stem 3 again.

[0023] Although the above describes the illustrative specific implementation methods of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific implementation methods. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.

Claims

1. An anti-corrosion butterfly valve, characterized by: include: A valve stem (3) is provided in the middle of the butterfly valve body (1), a rotary disk (4) is provided on the top of the valve stem (3), the valve stem (3) extends from the top of the butterfly valve body (1), a cavity (9) is provided inside the top of the valve stem (3), the valve stem (3) is provided with a first telescopic groove (8) on both sides of the cavity (9), an extrusion plate (7) is inserted into the first telescopic groove (8), the top of the extrusion plate (7) extends from the top of the rotary disk (4) and is connected to the pressure plate (6), and a first spring (5) is connected between the pressure plate (6) and the rotary disk (4).

2. The anti-corrosion butterfly valve according to claim 1, characterized in that: The bottom of the valve stem (3) is inserted into the interior of the butterfly valve body (1), and a disc plate (13) is provided at the bottom end of the valve stem (3). By rotating the turntable (4), the valve stem (3) can drive the disc plate (13) to rotate, thereby controlling the flow rate of the liquid.

3. The anti-corrosion butterfly valve according to claim 2, characterized in that: The valve stem (3) is provided with a second telescopic groove (14) in the middle of the contraction plate (10), the top of the second telescopic groove (14) is communicated with the first telescopic groove (8), a second spring (15) is provided in the second telescopic groove (14), the inner side of the second spring (15) is connected to the top holding block (16), and the extrusion plate (7) in the first telescopic groove (8) can squeeze the arc surface of the top holding block (16) so that the top holding block (16) extends out from the second spring (15).

4. The anti-corrosion butterfly valve according to claim 3, characterized in that: The outer side of the bottom end of the retracting plate (10) is connected to the insertion rod (12). The butterfly valve body (1) is provided with a plurality of slots (11) around the valve stem (3) and parallel to the slots (11). The insertion rod (12) can extend from the cavity (9) and be inserted into the slots (11) to lock the rotation of the valve stem (3).

5. The anti-corrosion butterfly valve according to claim 4, characterized in that: The inner middle part of the retractable plate (10) is connected to a third spring (17), which connects the two groups of retractable plates (10). The supporting block (16) can squeeze the retractable plate (10), so that the retractable plate (10) drives the insertion rod (12) to retract into the cavity (9).

6. The anti-corrosion butterfly valve according to claim 5, characterized in that: An anti-corrosion layer (2) is provided on the inner wall of the butterfly valve body (1), and the anti-corrosion layer (2) can make the butterfly valve body (1) have good corrosion resistance.

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