Multilayer sealing butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a multilayer sealing butterfly valve which comprises a valve body, a valve clack and a driving mechanism, the inner wall of the valve body is sleeved with a multilayer sealing sleeve, the driving mechanism comprises a fixing column, a rotating block and a driving bevel gear, a rotating cavity is formed in the fixing column, and the driving bevel gear is arranged in the rotating cavity. The upper end of the rotating block is fixedly connected with a driven bevel gear, a connecting mechanism is arranged at the upper end of the valve body and comprises two threaded rods, a valve rod and a lower shaft rod, fixing blocks are fixedly connected to the two sides of the upper end of the valve body, and connecting grooves are formed in the sides, close to the center of the valve body, of the fixing blocks. The connecting grooves are connected with the fixing columns in a sliding mode. According to the valve, the connecting groove is in sliding connection with the fixing column to limit vertical movement of the fixing column, the threaded rod is matched to push the clamping block to be connected with the clamping groove in a clamped mode to limit rotation of the fixing column, the valve rod, the lower shaft rod and the valve clack are installed on the valve body, and then workers can assemble the valve conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve with multi-layer seals. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that controls the flow of fluid in a pipeline by rotating the valve disc 90 degrees around the axis of the valve stem to open and close. A butterfly valve with multi-layer seals is a butterfly valve that uses a sealing surface with a multi-layer sealing structure design to improve the sealing performance, and it usually has a long service life.

[0003] However, since the butterfly valve with multi-layer seals needs to be assembled by workers before leaving the factory, and most of the existing butterfly valves with multi-layer seals on the market are not convenient for workers to assemble, which increases the operational complexity of the workers and reduces the assembly efficiency of the valve.

[0004] Therefore, the technical personnel in this field provide a butterfly valve with multi-layer seals to solve the problems raised in the above background art. Content of the Utility Model

[0005] The purpose of the content of the utility model is to solve the disadvantages existing in the prior art, and provide a butterfly valve with multi-layer seals. By slidingly connecting the connecting groove with the fixed column to restrict its up and down movement, and cooperating with the threaded rod to push the clamping block to be clamped with the clamping groove to restrict the rotation of the fixed column, the valve stem, the lower shaft rod and the valve disc are installed on the valve body, thereby facilitating the workers to assemble the valve.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A butterfly valve with multi-layer seals includes a valve body, a valve disc and a driving mechanism. A multi-layer sealing sleeve is sleeved on the inner wall of the valve body. The driving mechanism includes a fixed column, a rotating block and a driving bevel gear. A rotating cavity is opened inside the fixed column, and a driven bevel gear is fixedly connected to the upper end of the rotating block;

[0008] A connecting mechanism is arranged at the upper end of the valve body. The connecting mechanism includes two threaded rods, a valve stem and a lower shaft rod. Fixed blocks are fixedly connected to both sides of the upper end of the valve body. Connecting grooves are opened on one side of the fixed blocks close to the center of the valve body. The connecting grooves are all slidably connected with the fixed column, and the outer walls of the threaded rod bodies are all threadedly connected with the fixed blocks; <H

[0009] Clamping blocks are rotatably connected to one side of the threaded rods close to the center of the valve body. Clamping grooves are opened at the lower ends of the outer walls on both sides of the fixed column. The clamping grooves are all clamped and connected with the clamping blocks. The lower end of the outer wall of the valve stem is slidably connected with the valve disc, and the outer wall of the lower shaft rod is slidably connected with the valve disc;

[0010] Through the above technical solution, the connection groove opened on the fixing block is slidably connected with the fixing column to restrict its up and down movement. In cooperation with the threaded rod to push the clamping block to be clamped and connected with the clamping groove, the rotation of the fixing column is restricted, so that the valve stem, the lower shaft rod, and the valve flap are installed on the valve body. By using the threaded rod to drive the clamping block to move, the clamping state of the clamping groove is released, and the fixing column is rotated out of the connection groove and removed, which is convenient for the staff to assemble the valve and also convenient for the staff to disassemble the valve for cleaning and maintenance.

[0011] Further, a plurality of connection holes are opened on the outer walls of the front end and the rear end of the valve body, and the inner wall of the multi-layer sealing sleeve is closely fitted with the valve flap;

[0012] Through the above technical solution, through the plurality of connection holes opened on the outer walls of the front end and the rear end of the valve body, the valve can be fixed to the external pipeline by means of a plurality of bolts and nuts, and the valve is connected to the pipeline system.

[0013] Further, the outer wall of the rotating block is rotatably connected with the rotating cavity, and the upper end of the driven bevel gear penetrates through the rotating cavity and is fixedly connected with an indicating block;

[0014] Through the above technical solution, by rotatably connecting the outer wall of the rotating block with the rotating cavity in the fixing column and fixedly connecting the driven bevel gear with the indicating block, the rotation of the rotating block can drive the indicating block to rotate on the fixing column, and further reflect the rotation angle of the valve flap through the rotation of the indicating block, which is convenient for the staff to understand the opening and closing conditions of the valve.

[0015] Further, the driven bevel gear is meshed with the driving bevel gear, and one side of the driving bevel gear penetrates through the fixing column and is fixedly connected with a handwheel;

[0016] Through the above technical solution, by fixedly connecting the driving bevel gear with the handwheel and meshing the driven bevel gear with the driving bevel gear, the staff can drive the driven bevel gear to rotate by using the handwheel.

[0017] Further, a placement groove is opened at the center of the upper end of the valve body, and a multi-layer packing is arranged inside the placement groove, and the inner wall of the multi-layer packing is closely fitted with the valve stem;

[0018] Through the above technical solution, by arranging the multi-layer packing in the placement groove opened at the upper end of the valve body and using the fixing column to press the valve stem to compact the multi-layer packing and closely fit it with the valve stem, the gap between the valve stem and the valve body is filled, and the sealing ability is improved. The multi-layer packing is composed of a composite laminate of polytetrafluoroethylene and graphite.

[0019] Further, knobs are fixedly connected to one sides of the threaded rods far away from the center of the valve body, and the clamping blocks all slide inside the connection groove;

[0020] Through the above technical solution, the knob fixedly connected to the threaded rod facilitates the staff to rotate the threaded rod. The threaded rod is threadedly connected to the fixed block and rotatably connected to the clamping block, so that the clamping block can be driven to move along the connecting groove, changing the clamping state of the clamping groove.

[0021] Further, the lower end of the lower shaft rod penetrates through multiple sealing sleeves and is rotatably connected to the valve body, and the upper end of the valve rod penetrates through multiple sealing sleeves, the valve body and the fixed column and is slidably connected to the rotating block;

[0022] Through the above technical solution, by the slidable connection between the valve rod and the rotating block, when the fixed column is connected to the valve body, the valve rod can be easily inserted into the rotating block, and the rotation of the rotating block can drive the valve flap to rotate in the valve body along the valve rod and the lower shaft rod, changing the opening and closing condition of the valve.

[0023] The utility model has the following beneficial effects:

[0024] A butterfly valve with multi-layer seals proposed by the utility model is slidably connected to the fixed column through the connecting groove opened on the fixed block in the connecting mechanism, restricting its up and down movement, and cooperating with the threaded rod to push the clamping block to be clamped and connected to the clamping groove, restricting the rotation of the fixed column, so that the valve rod, the lower shaft rod and the valve flap are installed on the valve body. By using the threaded rod to drive the clamping block to move, the clamping state of the clamping groove is released, and the fixed column is rotated out of the connecting groove and removed, which facilitates the staff to assemble the valve, reduces the operation complexity of the staff, improves the assembly efficiency of the valve, and also facilitates the staff to disassemble the valve for cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the main structure of a butterfly valve with multi-layer seals proposed by the utility model;

[0026] Figure 2 is an exploded view of a butterfly valve with multi-layer seals proposed by the utility model;

[0027] Figure 3 is a front sectional view of a butterfly valve with multi-layer seals proposed by the utility model;

[0028] Figure 4 is an axial sectional view of a butterfly valve with multi-layer seals proposed by the utility model;

[0029] Figure 5 is Figure 3 an enlarged view of part A in

[0030] DESCRIPTION OF THE REFERENCE NUMERALS:

[0031] 1. Valve body; 2. Connecting hole; 3. Multi-layer sealing sleeve; 4. Valve flap; 5. Driving mechanism; 501. Fixed column; 502. Rotating cavity; 503. Rotating block; 504. Driven bevel gear; 505. Driving bevel gear; 506. Handwheel; 507. Indicator block; 6. Placing groove; 7. Multi-layer packing; 8. Connecting mechanism; 801. Fixed block; 802. Connecting groove; 803. Threaded rod; 804. Knob; 805. Clamping block; 806. Card slot; 807. Valve stem; 808. Lower shaft rod. Detailed implementation manners

[0032] The technical solutions in the specific implementation manners of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the specific implementation manners of the present utility model. Obviously, the described specific implementation manners are only a part of the specific implementation manners of the present utility model, rather than all of the specific implementation manners. All other specific implementation manners obtained by those of ordinary skill in the art based on the specific implementation manners of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] Refer to Figures 1-5 , the present utility model provides a specific implementation manner: a butterfly valve with multi-layer sealing, including a valve body 1, a valve flap 4 and a driving mechanism 5. A multi-layer sealing sleeve 3 is sleeved on the inner wall of the valve body 1. The driving mechanism 5 includes a fixed column 501, a rotating block 503 and a driving bevel gear 505. A rotating cavity 502 is opened inside the fixed column 501, and a driven bevel gear 504 is fixedly connected to the upper end of the rotating block 503;

[0034] A connecting mechanism 8 is arranged at the upper end of the valve body 1. The connecting mechanism 8 includes two threaded rods 803, a valve stem 807 and a lower shaft rod 808. Fixed blocks 801 are fixedly connected to both sides of the upper end of the valve body 1. Connecting grooves 802 are opened on one side of the fixed blocks 801 close to the center of the valve body 1. The connecting grooves 802 are all slidably connected to the fixed column 501, and the outer walls of the threaded rods 803 are all threadedly connected to the fixed blocks 801;

[0035] Clamping blocks 805 are rotatably connected to one side of the threaded rods 803 close to the center of the valve body 1. Card slots 806 are opened at the lower ends of the outer walls on both sides of the fixed column 501. The card slots 806 are all clamped and connected to the clamping blocks 805. The lower end of the outer wall of the valve stem 807 is slidably connected to the valve flap 4, and the outer wall of the lower shaft rod 808 is slidably connected to the valve flap 4.

[0036] By slidingly connecting with the fixed column 501 through the connecting groove 802 formed on the fixed block 801 in the connecting mechanism 8, its up and down movement is restricted. Cooperating with the threaded rod 803 to push the clamping block 805 into clamping connection with the clamping groove 806, the rotation of the fixed column 501 is restricted, so that the valve stem 807, the lower shaft rod 808, and the valve flap 4 are installed on the valve body 1. By using the threaded rod 803 to drive the clamping block 805 to move, the clamping state with the clamping groove 806 is released, and the fixed column 501 is rotated out of the connecting groove 802 and removed. Thus, it is convenient for the staff to assemble the valve, reducing the operation complexity of the staff, improving the assembly efficiency of the valve, and at the same time facilitating the staff to disassemble the valve for cleaning and maintenance.

[0037] Both the outer walls of the front end and the rear end of the valve body 1 are provided with a plurality of connection holes 2. The inner wall of the multi-layer sealing sleeve 3 is closely fitted with the valve flap 4. Through the plurality of connection holes 2 provided on the outer walls of the front end and the rear end of the valve body 1, a plurality of bolts and nuts can be used to fix the valve to the external pipeline, and the valve is connected to the pipeline system. The outer wall of the rotating block 503 is rotatably connected to the rotating cavity 502. The upper end of the driven bevel gear 504 penetrates through the rotating cavity 502 and is fixedly connected with an indicating block 507. Through the rotatable connection between the outer wall of the rotating block 503 and the rotating cavity 502 in the fixed column 501, and the fixed connection between the driven bevel gear 504 and the indicating block 507, the rotation of the rotating block 503 can drive the indicating block 507 to rotate on the fixed column 501, and further reflect the rotation angle of the valve flap 4 through the rotation of the indicating block 507, facilitating the staff to understand the opening and closing conditions of the valve. The driven bevel gear 504 is meshed with the driving bevel gear 505. One side of the driving bevel gear 505 penetrates through the fixed column 501 and is fixedly connected with a handwheel 506. Through the fixed connection between the driving bevel gear 505 and the handwheel 506, and the meshing connection between the driven bevel gear 504 and the driving bevel gear 505, the staff can use the handwheel 506 to drive the driven bevel gear 504 to rotate. A placement groove 6 is provided at the center of the upper end of the valve body 1. A multi-layer packing 7 is arranged inside the placement groove 6. The inner wall of the multi-layer packing 7 is closely fitted with the valve stem 807. Through the multi-layer packing 7 arranged in the placement groove 6 provided at the upper end of the valve body 1, and using the fixed column 501 to press the valve stem 807, the multi-layer packing 7 is compacted and closely fitted with the valve stem 807, so that the gap between the valve stem 807 and the valve body 1 is filled, improving the sealing ability. The multi-layer packing 7 is composed of a composite laminate of polytetrafluoroethylene and graphite. On one side of the threaded rod 803 far from the center of the valve body 1, a knob 804 is fixedly connected. The clamping blocks 805 all slide inside the connection groove 802. Through the knob 804 fixedly connected to the threaded rod 803, it is convenient for the staff to rotate the threaded rod 803. The threaded rod 803 is threadedly connected to the fixed block 801 and rotatably connected to the clamping blocks 805, so that the clamping blocks 805 can be driven to move along the connection groove 802, changing the clamping state of the clamping groove 806. The lower end of the lower shaft rod 808 penetrates through the multi-layer sealing sleeve 3 and is rotatably connected to the valve body 1. The upper end of the valve stem 807 penetrates through the multi-layer sealing sleeve 3, the valve body 1 and the fixed column 501 and is slidably connected to the rotating block 503. Through the slidable connection between the valve stem 807 and the rotating block 503, when the fixed column 501 is connected to the valve body 1, the valve stem 807 can be easily inserted into the rotating block 503, and the rotation of the rotating block 503 can drive the valve flap 4 to rotate in the valve body 1 along the valve stem 807 and the lower shaft rod 808, changing the opening and closing conditions of the valve.

[0038] Working principle: When using this multi-layer sealed butterfly valve, the staff first insert the lower shaft rod 808 and the valve stem 807 into the valve flap 4 through the material discharge groove 6 at the upper end of the valve body 1, so that the lower shaft rod 808 is rotationally connected to the valve body 1. Then, the connecting groove 802 on the fixing block 801 is slidably connected to the fixing column 501, the valve stem 807 is slidably connected to the rotating block 503, and the knob 804 is used to drive the rotation of the threaded rod 803, so that the clamping block 805 is clamped and connected to the clamping groove 806, connecting the fixing column 501 to the valve body 1. Secondly, the staff connect the valve to the pipeline system by connecting the valve body 1 to the external pipeline through multiple connecting holes 2 provided on the valve body 1 and multiple bolts and nuts. Then, the staff drive the rotation of the driving bevel gear 505 through the handwheel 506, and use the meshing connection between the driving bevel gear 505 and the driven bevel gear 504, so that the valve stem 807 is rotated through the rotating block 503, changing the angle of the valve flap 4 to adjust the opening and closing of the valve. Finally, after the staff remove the valve from the pipeline system, the knob 804 is used to drive the rotation of the threaded rod 803 to release the clamping state of the clamping block 805 on the clamping groove 806. Then, the fixing column 501 is rotated and removed, and the valve stem 807 and the lower shaft rod 808 are slid out of the valve flap 4, and the valve flap 4 is removed, facilitating the staff to clean and maintain the valve.

[0039] In this article, the following points need to be noted:

[0040] 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the usual designs.

[0041] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0042] Finally, it should be noted that the above are only the preferred specific 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 specific embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on 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 butterfly valve, comprising a valve body (1), a valve disc (4) and a drive mechanism (5), characterized in that: The inner wall of the valve body (1) is provided with a multi-layer sealing sleeve (3), and the driving mechanism (5) comprises a fixed column (501), a rotating block (503) and a driving bevel gear (505). A rotating cavity (502) is provided inside the fixed column (501), and the upper end of the rotating block (503) is fixedly connected to a driven bevel gear (504); The upper end of the valve body (1) is provided with a connecting mechanism (8), and the connecting mechanism (8) includes two threaded rods (803), a valve stem (807) and a lower shaft rod (808). Both sides of the upper end of the valve body (1) are fixedly connected with fixed blocks (801). A connecting groove (802) is provided on one side of the fixed block (801) near the center of the valve body (1). The connecting groove (802) is slidably connected to the fixed column (501). The outer wall of the rod body of the threaded rod (803) is threadedly connected to the fixed block (801). The threaded rod (803) is rotatably connected to a clamping block (805) on one side near the center of the valve body (1), and the lower ends of the outer walls on both sides of the fixed column (501) are provided with clamping grooves (806), and the clamping grooves (806) are clamped and connected to the clamping blocks (805). The lower end of the outer wall of the valve stem (807) is slidably connected to the valve disc (4), and the outer wall of the lower shaft rod (808) is slidably connected to the valve disc (4).

2. A multi-layer sealed butterfly valve according to claim 1, characterized in that: The outer walls of the front end and the rear end of the valve body (1) are both provided with a plurality of connection holes (2), and the inner wall of the multi-layer sealing sleeve (3) is tightly fitted with the valve disc (4).

3. The multi-layer sealed butterfly valve according to claim 1, characterized in that: The outer wall of the rotating block (503) is rotatably connected to the rotating cavity (502), and the upper end of the driven bevel gear (504) passes through the rotating cavity (502) and is fixedly connected to the indicating block (507).

4. The multi-layer sealed butterfly valve according to claim 1, characterized in that: The driven bevel gear (504) is meshedly connected with the driving bevel gear (505), and one side of the driving bevel gear (505) passes through the fixed column (501) and is fixedly connected to a hand wheel (506).

5. The multi-layer sealed butterfly valve according to claim 1, characterized in that: A placement groove (6) is provided at the center of the upper end of the valve body (1), and multiple layers of filler (7) are provided inside the placement groove (6). The inner wall of the multiple layers of filler (7) is tightly fitted to the valve stem (807).

6. The multi-layer sealed butterfly valve according to claim 1, characterized in that: The threaded rod (803) is fixedly connected to a knob (804) on one side away from the center of the valve body (1), and the clamping block (805) slides inside the connecting groove (802).

7. The multi-layer sealed butterfly valve according to claim 1, characterized in that: The lower end of the lower shaft (808) passes through the multi-layer sealing sleeve (3) and is rotatably connected to the valve body (1), and the upper end of the valve stem (807) passes through the multi-layer sealing sleeve (3), the valve body (1) and the fixed column (501) and is slidably connected to the rotating block (503).

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