Multi-layer sealing telescopic butterfly valve

Abstract

The utility model discloses a multi-layer sealing telescopic butterfly valve which comprises a butterfly valve body, a telescopic pipe is arranged at one end in the butterfly valve body in a telescopic mode, flange plates are fixedly connected to the two ends of the butterfly valve body respectively, a telescopic disc is fixedly connected to one end of the telescopic pipe, and a threaded rod penetrates through the position between the telescopic disc and the flange plate on one side. A plurality of nuts are in threaded connection with the interior of the screw rod, and a first sealing block is fixedly connected to the inner side of the telescopic pipe; a sealing ring is fixedly connected to one end of the telescopic pipe, a first sealing groove is formed in the other end of the telescopic pipe, and a second sealing block is inserted into the first sealing groove. By arranging the butterfly valve main body, the telescopic pipe, the screw rod and the telescopic disc, the butterfly valve main body is connected with the pipeline, and the extension of the telescopic pipe can be controlled as required in the connecting process, so that the telescopic connection effect can be conveniently achieved when the pipeline is connected, and the use convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion butterfly valves, and particularly relates to a multi-layer sealed expansion butterfly valve. Background Technique

[0002] An expansion butterfly valve is a valve that uses a circular butterfly plate as a closing and opening member and rotates with the valve stem to open, close, and adjust a fluid passage, and is a component used to achieve the on-off and flow control of a pipeline system.

[0003] When the existing expansion butterfly valve is in use, it can control the length extension according to the need, but the sealing effect is relatively poor, and it is easy to have penetration, affecting the sealing performance. At the same time, if the water pressure inside the expansion butterfly valve is too high, it will cause damage to the valve core and affect the use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multi-layer sealed expansion butterfly valve. By connecting the butterfly valve body to the pipeline, the extension of the expansion pipe can be controlled according to the need during the connection process, which is convenient for achieving telescopic connection when connecting the pipeline and improves the use convenience.

[0005] To achieve the above purpose, a multi-layer sealed expansion butterfly valve is provided, including: a butterfly valve body, an expansion pipe is telescopically arranged at one end inside the butterfly valve body, flange plates are fixedly connected to both ends of the butterfly valve body, an expansion disk is fixedly connected to one end of the expansion pipe, a screw rod penetrates between the expansion disk and a flange plate on one side, a plurality of nuts are threadedly connected inside the screw rod, and a first sealing block is fixedly connected to the inner side of the expansion pipe;

[0006] A sealing ring is fixedly connected to one end of the expansion pipe, a first sealing groove is opened at the other end of the expansion pipe, a second sealing block is inserted into the first sealing groove, and the second sealing block is fixedly connected to the inner wall of the butterfly valve body.

[0007] According to the described multi-layer sealed expansion butterfly valve, a buffer plate is arranged on the other side inside the butterfly valve body, and through holes are opened in the buffer plate.

[0008] According to the described multi-layer sealed expansion butterfly valve, four corrugated pipes are fixedly connected circumferentially inside the buffer plate, and a limiting block is fixedly connected to one end of the corrugated pipe. The corrugated pipe can play a sealing role.

[0009] According to the described multi-layer sealed expansion butterfly valve, a rigid spring is sleeved inside the corrugated pipe, and the rigid spring can play an elastic buffering role.

[0010] According to the described multi-layer sealed telescopic butterfly valve, a handwheel is provided in the middle of the top end of the butterfly valve body, and a valve core is provided in the middle of the interior of the butterfly valve body. The valve core is used to close and open the butterfly valve.

[0011] According to the described multi-layer sealed telescopic butterfly valve, the number of the nuts is three, and the nut structure can play a role in limiting and supporting.

[0012] According to the described multi-layer sealed telescopic butterfly valve, a second sealing groove is formed on the inner side of the flange plate, and the first sealing block is inserted and matched with the second sealing groove. Through the sealing cooperation of the first sealing block and the second sealing groove, the sealing performance is enhanced.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model is provided with a butterfly valve body, a telescopic pipe, a screw rod and a telescopic disc. By connecting the butterfly valve body to the pipeline, during the connection process, the extension of the telescopic pipe can be controlled according to requirements, which is convenient for the telescopic connection during pipeline connection, improving the usability. Subsequently, when the telescopic pipe reaches the required length, the screw rod can penetrate through the flange plate and the telescopic disc, and then by rotating the nuts on both sides in the middle, the flange plate and the telescopic disc can be abutted, and finally, the end nut is flange-connected to the connected pipeline flange.

[0015] 2. The present utility model is provided with a buffer plate, a rigid spring and a through hole. When the pressure is relatively large during the flow process, the water pressure will push the buffer plate. At this time, the buffer plate plays a buffering role and can resist the water pressure. The rigid spring elastically rebounds, and then the water pressure penetrates and discharges through the through hole, which can slow down the internal pressure of the butterfly valve body and prevent damage to the valve core due to excessive pressure.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0018] Figure 1 is a three-dimensional structure diagram of a multi-layer sealed telescopic butterfly valve of the present utility model;

[0019] Figure 2 is a front sectional view of a multi-layer sealed telescopic butterfly valve of the present utility model;

[0020] Figure 3 For the present utility model Figure 2 The enlarged view at A;

[0021] Figure 4 This is the front view of the corrugated pipe cross-section of a multi-layer sealed expansion butterfly valve of the present utility model.

[0022] In the figure: 1, butterfly valve body; 2, handwheel; 3, screw; 4, nut; 5, expansion disc; 6, expansion pipe; 7, flange; 8, buffer plate; 9, through hole; 10, limit block; 11, first sealing block; 12, sealing ring; 13, first sealing groove; 14, second sealing groove; 15, second sealing block; 16, corrugated pipe; 17, rigid spring. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] Please refer to Figures 1-4, the present utility model provides a technical solution: a multi-layer sealed telescopic butterfly valve, which includes: a butterfly valve body 1, a telescopic pipe 6 telescopically extends at one end inside the butterfly valve body 1. By connecting the butterfly valve body 1 to a pipeline, during the connection process, the extension of the telescopic pipe 6 can be controlled as required, which is convenient for achieving telescopic connection when connecting pipelines, improving the usability. Flange plates 7 are fixedly connected to both ends of the butterfly valve body 1. A telescopic plate 5 is fixedly connected to one end of the telescopic pipe 6. A screw rod 3 passes through between the telescopic plate 5 and the flange plate 7 on one side. After telescoping to the required length, the screw rod 3 can pass through the flange plate 7 and the telescopic plate 5, and then by rotating the nuts 4 on both sides in the middle, the abutment between the flange plate 7 and the telescopic plate 5 can be achieved. A number of nuts 4 are threadedly connected inside the screw rod 3. A first sealing block 11 is fixedly connected to the inner side of the telescopic pipe 6. A handwheel 2 is arranged in the middle of the top of the butterfly valve body 1. A valve core is arranged in the middle of the butterfly valve body 1. The number of nuts 4 is three. A second sealing groove 14 is opened inside the flange plate 7. The first sealing block 11 and the second sealing groove 14 are in plug-in fit, and the sealing performance is improved through the sealing plug-in fit, increasing multi-layer sealing to prevent the penetration of moisture;

[0026] A sealing ring 12 is fixedly connected to one end of the telescopic pipe 6. A first sealing groove 13 is opened at the other end of the telescopic pipe 6. A second sealing block 15 is inserted into the first sealing groove 13. The second sealing block 15 is fixedly connected to the inner wall of the butterfly valve body 1. A buffer plate 8 is arranged on the other side inside the butterfly valve body 1. The flow is realized through the butterfly valve body 1. When the pressure is relatively high during the flow process, the water pressure will push the buffer plate 8. At this time, the buffer plate 8 plays a buffering role and can play a role in resisting the water pressure. Through holes 9 are opened inside the buffer plate 8. Four corrugated pipes 16 are fixedly connected to the inner circumference of the buffer plate 8. The corrugation expansion is improved through the corrugated pipes 6, which can prevent moisture from penetrating into the inside of the rigid spring 17 and affecting the use. One end of the corrugated pipe 6 is fixedly connected to a limiting block 10. A rigid spring 17 is sleeved inside the corrugated pipe 16. The rigid spring 17 elastically returns. Then the water pressure penetrates and is discharged through the through holes 9, which can slow down the pressure inside the butterfly valve body 1 and prevent damage to the valve core due to excessive pressure.

[0027] Working principle: When in use, first connect the butterfly valve body 1 to the pipeline. During the connection process, the extension of the telescopic pipe 6 can be controlled according to requirements, which is convenient for achieving telescopic connection when connecting the pipeline, improving the convenience of use. Subsequently, when it is extended to the required length, the screw 3 can penetrate through the flange 7 and the telescopic plate 5, and then by rotating the nuts 4 on both sides in the middle, the flange 7 and the telescopic plate 5 can be made to contact. Finally, the end nut 4 is flange-connected to the connected pipeline flange to fix the position of the telescopic pipe 6 during installation. After installation, the liquid can flow through the butterfly valve body 1. When the pressure is relatively high during the flow process, the water pressure will push the buffer plate 8. At this time, the buffer plate 8 plays a buffering role and can resist the water pressure. The rigid spring 17 elastically returns, and then the water pressure penetrates and discharges through the through hole 9, which can slow down the internal pressure of the butterfly valve body 1 and prevent damage to the valve core due to excessive pressure.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-layer sealed telescopic butterfly valve, comprising: A butterfly valve body (1), characterized in that a telescopic tube (6) is telescopically arranged at one end of the interior of the butterfly valve body (1), both ends of the butterfly valve body (1) are fixedly connected to flanges (7), one end of the telescopic tube (6) is fixedly connected to a telescopic disk (5), a screw (3) passes through between the telescopic disk (5) and the flange (7) on one side, a plurality of nuts (4) are connected to the internal threads of the screw (3), and a first sealing block (11) is fixedly connected to the inner side of the telescopic tube (6); One end of the telescopic tube (6) is fixedly connected to a sealing ring (12), the other end of the telescopic tube (6) is provided with a first sealing groove (13), a second sealing block (15) is inserted into the interior of the first sealing groove (13), and the second sealing block (15) is fixedly connected to the inner wall of the butterfly valve body (1).

2. A multi-layer sealing telescopic butterfly valve according to claim 1, characterized in that: A buffer plate (8) is provided on the other side of the interior of the butterfly valve body (1), and a through hole (9) is provided inside the buffer plate (8).

3. A multi-layer sealing telescopic butterfly valve as claimed in claim 2, characterized in that: Four bellows (16) are fixedly connected to the inner circumference of the buffer plate (8), and one end of the bellows (16) is fixedly connected to a limiting block (10).

4. A multi-layer sealing telescopic butterfly valve as claimed in claim 3, characterized in that: A steel spring (17) is sleeved inside the bellows (16).

5. A multi-layer sealed telescopic butterfly valve according to claim 1, characterized in that: A hand wheel (2) is arranged at the middle of the top end of the butterfly valve body (1), and a valve core is arranged in the middle of the interior of the butterfly valve body (1).

6. A multi-layer sealing telescopic butterfly valve according to claim 1, characterized in that: The number of the nuts (4) is three.

7. A multi-layer sealing telescopic butterfly valve according to claim 1, characterized in that: A second sealing groove (14) is provided on the inner side of the flange (7), and the first sealing block (11) and the second sealing groove (14) are plug-fitted.

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