A seal butterfly valve

Abstract

The utility model provides a sealed butterfly valve, including valve main part and outer screw cylinder, the butterfly plate is installed in valve main part inside longitudinally, the shell body is installed to valve main part outside, the welding block is welded to shell body upper end, the conical step groove is established to shell body with welding block upper end, the conical rubber cylinder is close -fitting to conical step groove inner wall lower extreme, the rubber groove ring is integrally installed to conical rubber cylinder lower extreme, the first rubber ring is glued to rubber groove ring inside outside, the conical rubber ring is glued to rubber groove ring inside inboard, this design has solved the problem that the medium leakage risk exists between the driving shaft and the valve body in the original sealed butterfly valve, the driving shaft and the valve body are too simple, the sealing effect is general, can effectively seal the inside connection of the valve stem and the valve main part.

Description

Technical Field

[0001] This utility model is a sealing butterfly valve, belonging to the field of valve technology. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is characterized by a disc-shaped closing element (valve disc or butterfly plate) that rotates around its axis to open and close. Valves can control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices. The butterfly valve's opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body to achieve opening, closing, or regulation. A packing seal is used between the upper part of the valve stem and the valve body, and the packing is tightened by fasteners to prevent leakage of the media inside the butterfly valve.

[0003] For example, Chinese patent CN213064650U proposes a sealing butterfly valve. Through the combination of limiting plate I, limiting plate II and sealing gasket, when the butterfly plate rotates to be parallel to the annular outer shell, the driving shaft will rotate inside the through groove when the butterfly plate rotates. At this time, the butterfly plate will rotate with the driving shaft, and the fixed shaft will rotate in the middle of the bearing. However, the connection between the driving shaft and the valve body in this sealing butterfly valve is too simple, and the sealing effect is generally poor, which makes there a risk of medium leakage between the driving shaft and the valve body. Now there is an urgent need for a sealing butterfly valve to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sealing butterfly valve to solve the problems mentioned in the background art. This utility model adopts an adjustable sealing structure, which can effectively seal the connection between the valve stem and the internal connection of the valve body.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a sealing butterfly valve, comprising a valve body and an outer screw cylinder, wherein a butterfly plate is longitudinally installed inside the valve body, and an outer shell is installed outside the valve body. A welding block is welded to the upper end of the outer shell, and a conical stepped groove is formed at the upper end of the outer shell and the welding block. A conical rubber cylinder is tightly attached to the lower end of the inner wall of the conical stepped groove, and a rubber groove ring is integrally installed at the lower end of the conical rubber cylinder. A first rubber ring is adhered to the inner outer side of the rubber groove ring, and the inner inner side of the rubber groove ring... A conical rubber ring is adhered to the outer screw cylinder. Two second rubber rings are adhered to the inner side of the conical rubber ring. An internal threaded welding ring is welded to the upper outer side of the conical stepped groove. The outer screw cylinder passes through the internal threaded welding ring by threads. The lower end of the outer screw cylinder is located in the conical stepped groove. A force-shaping washer is adhered to the lower end face of the outer screw cylinder. Multiple return springs are longitudinally installed at the lower end of the force-shaping washer. The lower ends of the multiple return springs are connected to a conical push ring. A magnetic inner cylinder is adhered to the inner wall of the outer screw cylinder. A valve stem passes through the magnetic inner cylinder, the conical rubber ring, and the two second rubber rings.

[0006] Furthermore, a pair of butterfly rods are installed through the connection between the outer shell and the lower end of the valve body, and the upper end of the pair of butterfly rods is installed inside the butterfly plate.

[0007] Furthermore, a valve plate is horizontally fixed to the upper end of the valve stem.

[0008] Furthermore, a hand-tightening cylinder is integrally fixed to the upper outer end of the outer screw cylinder.

[0009] Furthermore, the conical push ring is located inside the rubber groove ring and abuts against the first rubber ring and the conical rubber ring respectively.

[0010] Furthermore, the lower end of the valve stem passes through the welding block to connect the valve body to the upper end of the butterfly plate.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a sealing butterfly valve with a reasonable structure. It incorporates a welding block, a conical stepped groove, a conical rubber cylinder, a rubber groove ring, a first rubber ring, a conical rubber ring, a second rubber ring, a conical push ring, a return spring, a force-sharing washer, an internal threaded welding ring, an external threaded cylinder, a hand-tightening cylinder, and a magnetic inner cylinder. It adopts an adjustable sealing structure, combined with manual thread adjustment, magnetic damping locking, and multiple spring compressions, which force each rubber ring to press tightly against the connection between the valve stem and the valve body, preventing leakage at this point and effectively sealing the connection between the valve stem and the valve body. It is highly practical. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of a sealing butterfly valve according to the present invention;

[0014] Figure 2 This is a cross-sectional structural diagram of a sealing butterfly valve according to the present invention;

[0015] Figure 3 This is a schematic diagram of the disassembled structure of the conical push ring of a sealing butterfly valve according to the present invention;

[0016] Figure 4 This is a partially enlarged cross-sectional schematic diagram of the conical push ring of a sealing butterfly valve according to this utility model.

[0017] In the diagram: 1-valve body, 2-butterfly plate, 3-butterfly rod, 4-outer shell, 5-valve stem, 6-valve plate, 7-welded block, 8-conical stepped groove, 9-conical rubber cylinder, 10-rubber groove ring, 11-first rubber ring, 12-conical rubber ring, 13-second rubber ring, 14-conical push ring, 15-reset spring, 16-force component washer, 17-inner threaded welded ring, 18-outer threaded cylinder, 19-hand-tightening cylinder, 20-magnetic inner cylinder. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1-4 This utility model provides a technical solution: a sealing butterfly valve, including a valve body 1 and an outer screw cylinder 18. A butterfly plate 2 is longitudinally installed inside the valve body 1, and an outer shell 4 is installed outside the valve body 1. A welding block 7 is welded to the upper end of the outer shell 4. A conical stepped groove 8 is formed at the upper end of the outer shell 4 and the welding block 7. A conical rubber cylinder 9 is tightly attached to the lower end of the inner wall of the conical stepped groove 8. A rubber groove ring 10 is integrally installed at the lower end of the conical rubber cylinder 9. A first rubber ring 11 is adhered to the inner and outer sides of the rubber groove ring 10. A conical rubber ring 12 is adhered to the inner side of the rubber groove ring 10. Two second rubber rings 13 are adhered to the inner side of the conical rubber ring 12. The upper end of the outer side of the conical stepped groove 8... An internally threaded welding ring 17 is welded on the outer screw barrel 18, which passes through the internally threaded welding ring 17 via a thread. The lower end of the outer screw barrel 18 is located in a conical stepped groove 8. A force-shaping washer 16 is adhered to the lower end face of the outer screw barrel 18. Multiple return springs 15 are longitudinally installed at the lower end of the force-shaping washer 16. A conical push ring 14 is connected to the lower end of the multiple return springs 15. A magnetic inner cylinder 20 is adhered to the inner wall of the outer screw barrel 18. A valve stem 5 passes through the magnetic inner cylinder 20, the conical rubber ring 12, and the two second rubber rings 13. This design solves the problem that the connection between the drive shaft and the valve body in the original sealed butterfly valve is too simple, resulting in a general sealing effect and the risk of medium leakage between the drive shaft and the valve body.

[0020] As the first embodiment of this utility model: a pair of butterfly rods 3 are installed through the connection between the outer shell 4 and the lower end of the valve body 1. The upper end of the pair of butterfly rods 3 is installed inside the butterfly plate 2. By installing the upper end of the pair of butterfly rods 3 inside the butterfly plate 2, the lower end of the butterfly plate 2 can be prevented from tilting. A valve plate 6 is horizontally fixed to the upper end of the valve stem 5. The valve plate 6 facilitates the rotation of the valve stem 5. A hand-tightening cylinder 19 is integrally fixed to the upper end of the outer screw cylinder 18. The hand-tightening cylinder 19 facilitates the turning of the outer screw cylinder 18. The conical push ring 14 is located inside the rubber groove ring 10 and abuts against the first rubber ring 11 and the conical rubber ring 12 respectively. By abutting against the first rubber ring 11 and the conical rubber ring 12 respectively, the conical push ring 14 can apply a pushing force to the conical rubber ring 12, forcing the two second rubber rings 13 to fit tightly against the valve stem 5, ensuring its internal sealing. The lower end of the valve stem 5 passes through the welding block 7 to connect the valve body 1 and the upper end of the butterfly plate 2.

[0021] As a second embodiment of this utility model: when it is necessary to enhance the seal between the valve body 1 and the valve stem 5, the hand-operated cylinder 19 is turned forcefully, and the outer screw cylinder 18 can drive the inner cylinder of the magnet 20 to rotate outside the valve stem 5. Since the inner cylinder of the magnet 20 and the valve stem 5 are attracted by the magnet, there will be no self-rotation. The outer screw cylinder 18 will also rotate and move downward in the inner screw welding ring 17 through the thread principle, forcing the force component washer 16 to push down multiple return springs 15. The multiple return springs 15 will then apply a pushing force to the conical push ring 14. The downward movement of the conical push ring 14 will press the first rubber ring 11 and the conical rubber ring 12 tightly, forcing the conical rubber ring 12 to press the two second rubber rings 13 tightly, and cooperate with the two second rubber rings 13 to stick tightly to the valve stem 5 to ensure its internal sealing.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sealing butterfly valve, comprising a valve body (1) and an external screw cylinder (18), characterized in that: A butterfly plate (2) is longitudinally installed inside the valve body (1). An outer shell (4) is installed outside the valve body (1). A welding block (7) is welded to the upper end of the outer shell (4). A conical stepped groove (8) is opened at the upper end of the outer shell (4) and the welding block (7). A conical rubber cylinder (9) is tightly attached to the lower end of the inner wall of the conical stepped groove (8). A rubber groove ring (10) is integrally installed at the lower end of the conical rubber cylinder (9). A first rubber ring (11) is glued to the outer side of the rubber groove ring (10). A conical rubber ring (12) is glued to the inner side of the rubber groove ring (10). Two second rubber rings (11) are glued to the inner side of the conical rubber ring (12). 3) An inner threaded welding ring (17) is welded to the upper outer side of the tapered stepped groove (8). The outer screw (18) passes through the inner threaded welding ring (17) by thread. The lower end of the outer screw (18) is inside the tapered stepped groove (8). A force-shaping pad (16) is glued to the lower end face of the outer screw (18). Multiple return springs (15) are longitudinally installed at the lower end of the force-shaping pad (16). A tapered push ring (14) is connected to the lower end of the multiple return springs (15). A magnetic inner cylinder (20) is glued to the inner wall of the outer screw (18). A valve stem (5) passes through the magnetic inner cylinder (20), the tapered rubber ring (12), and the two second rubber rings (13).

2. A sealing butterfly valve according to claim 1, characterized in that: A pair of butterfly rods (3) are installed through the lower end of the outer shell (4) and the valve body (1), and the upper end of the pair of butterfly rods (3) is installed inside the butterfly plate (2).

3. A sealing butterfly valve according to claim 1, characterized in that: A valve plate (6) is horizontally fixed at the upper end of the valve stem (5).

4. A sealing butterfly valve according to claim 1, characterized in that: The upper part of the outer screw (18) is integrally fixed with a hand-tightening cylinder (19).

5. A sealing butterfly valve according to claim 1, characterized in that: The conical push ring (14) is located inside the rubber groove ring (10) and abuts against the first rubber ring (11) and the conical rubber ring (12) respectively.

6. A sealing butterfly valve according to claim 1, characterized in that: The lower end of the valve stem (5) passes through the welding block (7) to connect the valve body (1) with the upper end of the butterfly plate (2).

Images