Three-eccentric center butterfly valve suitable for strong corrosive medium

Abstract

The utility model belongs to the field of three-eccentric center butterfly valves, and particularly relates to a three-eccentric center butterfly valve suitable for strong corrosive media, which comprises a valve body, a base is fixedly mounted at the bottom of the valve body, a valve rod is rotatably mounted at the top of the valve body in a penetrating manner, and valve plate mechanisms are arranged on two sides of the valve rod; an annular groove is formed in the inner side of the valve body, a sealing mechanism is arranged on the inner side of the annular groove, an electric control module is fixedly installed at the top of the valve body, and an output shaft of the electric control module is fixedly connected with the valve rod. The sealing effect of the sealing rubber ring can be prevented from being reduced after a medium is scoured for a long time, a tiny gap between the semicircular valve plate and the valve body can be blocked through the sealing mechanism, leakage of the medium is effectively prevented, the semicircular valve plate can be replaced and installed rapidly through the arranged valve plate mechanism, and the sealing effect of the sealing rubber ring is improved. And the convenience of the equipment is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to three eccentric butterfly valve technical field especially suitable for strong corrosion medium's three eccentric butterfly valve. BACKGROUND

[0002] Three eccentric hard sealing butterfly valve is a kind of equipment for medium temperature ≤425 DEG C of metallurgy, power, petroleum chemical industry and industrial pipeline on water supply and drainage and municipal construction, three eccentric hard sealing butterfly valve is eccentric metal sealing structure, sealing form is metal to metal sealing, adjustable metal sealing ring to metal sealing, stainless steel plate and graphite composite plate sealing ring to metal sealing, the drive form of hard sealing butterfly valve in addition to electric drive has: manual, worm gear rod transmission, pneumatic etc.;

[0003] However, when three eccentric butterfly valve is used, medium forms frontal scouring to its sealing surface when valve plate is often open, and soft sealing band in metal sheet interlayer is directly affected sealing performance after being scoured. UTILITY MODEL CONTENT

[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A three eccentric butterfly valve suitable for strong corrosion medium, including valve body, the bottom of valve body is fixedly installed with base, the top of valve body is rotatably penetrated and installed with valve stem, both sides of valve stem are equipped with valve plate mechanism;The inside of valve body is equipped with annular groove, and the inside of annular groove is equipped with sealing mechanism.

[0006] Specifically, the top of the valve body is fixedly installed with an electric control module, and the output shaft of the electric control module is fixedly connected with the valve stem, so that the opening and closing of the valve can be controlled by the electric control module.

[0007] Specifically, the valve plate mechanism includes a connecting metal block, a semicircular valve plate and a bolt assembly, one side of the valve stem is fixedly installed with a connecting metal block, one side of the valve stem is provided with a semicircular valve plate, one side of the semicircular valve plate is provided with a connecting groove, the connecting metal block and the connecting groove are matched, and the inner side of the connecting groove is provided with a bolt assembly.

[0008] Specifically, the bolt assembly includes two nuts and two bolts, two nuts are fixedly installed on the inner wall of one side of the connecting groove, two bolts are slidably penetrated on one side of the connecting metal block, and the two bolts are respectively threadedly connected with the corresponding nuts, so as to connect the semicircular valve plate and the valve stem through the bolts and the nuts.

[0009] Specifically, the outer sides of the two semicircular valve plates are fixedly sleeved with the same sealing rubber ring, so as to increase the sealing effect of the two semicircular valve plates.

[0010] Specific, the closing mechanism includes a guide ring, a flat threaded disc, a drive assembly, a plurality of racks and a sealing assembly, the ring groove is fixedly installed with a guide ring on the inner wall of one side, a plurality of guide grooves are formed in the side of the guide ring, a plurality of racks are slidably installed on the side of the guide ring, the side of the plurality of racks is provided with a protrusion, the plurality of protrusions are slidably installed in the corresponding guide grooves, the other side of the ring groove is rotatably installed with a flat threaded disc, the flat threaded disc is provided with a drive assembly, the plurality of racks are matched with the same flat threaded disc, and the side of the plurality of racks is provided with a sealing assembly.

[0011] Specific, the drive assembly includes an external gear, a driving gear and a servo motor, the outer side of the flat threaded disc is fixedly provided with an external gear, the inner wall of one side of the ring groove is rotatably installed with a driving gear, the driving gear is engaged with the external gear, the inside of the valve body is provided with a motor groove, the inner wall of one side of the motor groove is fixedly installed with a servo motor, and the output shaft of the servo motor is fixedly connected with the driving gear. The driving gear can be driven to rotate by the servo motor.

[0012] Specific, the sealing assembly includes a sealing metal block and a sealing rubber strip, the sealing metal block is fixedly installed on the side of the rack, the sealing rubber strip is fixedly installed on the side of the sealing metal block, and the sealing rubber strip is in contact with the corresponding semicircular valve plate. The sealing effect of the valve is facilitated to be improved.

[0013] Compared with the prior art, the utility model has the advantages that through the closing mechanism, the sealing effect of the sealing rubber ring can be prevented from being reduced after long-time washing of the medium, the small gap between the semicircular valve plate and the valve body can be blocked through the closing mechanism, the leakage of the medium is effectively prevented, and through the valve plate mechanism, the semicircular valve plate can be replaced and installed quickly, and the convenience of the equipment is effectively improved. ACCURACY OF DRAWINGS

[0014] Figure 1 A three-eccentric butterfly valve suitable for strong corrosive medium is provided.

[0015] Figure 2 A three-eccentric butterfly valve suitable for strong corrosive medium is provided.

[0016] Figure 3 A three-eccentric butterfly valve suitable for strong corrosive medium is provided.

[0017] Figure 4 A three-eccentric butterfly valve suitable for strong corrosive medium is provided.

[0018] Figure 5 A three-dimensional structure split schematic view of a sealing mechanism of a three-eccentric butterfly valve suitable for strong corrosive medium is proposed in the utility model.

[0019] In the drawing: 1, valve body; 2, base; 3, electric control module; 4, valve rod; 5, connecting metal block; 6, connecting groove; 7, semicircular valve plate; 8, nut; 9, bolt; 10, sealing rubber ring; 11, guide ring; 12, guide groove; 13, flat threaded disc; 14, external tooth gear; 15, driving gear; 16, servo motor; 17, rack; 18, sealing metal block; 19, sealing rubber strip. DETAILED DESCRIPTION

[0020] Referring to Figures 1-5 A three-eccentric butterfly valve suitable for strong corrosive medium, comprising a valve body 1, a base 2 is fixedly installed at the bottom of the valve body 1, a valve rod 4 is rotatably penetrated and installed at the top of the valve body 1, and valve plate mechanisms are arranged on both sides of the valve rod 4; an annular groove is formed in the inner side of the valve body 1, and a sealing mechanism is arranged on the inner side of the annular groove.

[0021] In the embodiment, an electric control module 3 is fixedly installed at the top of the valve body 1, and the output shaft of the electric control module 3 is fixedly connected with the valve rod 4, so that the opening and closing of the valve can be controlled through the electric control module 3.

[0022] In the embodiment, the valve plate mechanism comprises a connecting metal block 5, semicircular valve plates 7 and a bolt assembly, the connecting metal block 5 is fixedly installed on one side of the valve rod 4, the semicircular valve plates 7 are arranged on one side of the valve rod 4, the connecting grooves 6 are formed in one side of the semicircular valve plates 7, the connecting metal block 5 is matched with the connecting grooves 6, the bolt assembly is arranged on the inner side of the connecting grooves 6, and the two semicircular valve plates 7 are assembled with the same valve rod 4 to form an integral whole, so that the interior of the three-eccentric butterfly valve is sealed.

[0023] In the embodiment, the bolt assembly comprises two nuts 8 and two bolts 9, the two nuts 8 are fixedly installed on the inner wall of one side of the connecting grooves 6, the two bolts 9 are slidably penetrated through one side of the connecting metal block 5, and the two bolts 9 are threadedly connected with the corresponding nuts 8, so that the semicircular valve plates 7 and the valve rod 4 can be connected through the bolts 9 and the nuts 8.

[0024] In the embodiment, the same sealing rubber ring 10 is fixedly sleeved on the outer side of the two semicircular valve plates 7, and the sealing effect of the two semicircular valve plates 7 is improved.

[0025] In the embodiment, the closing mechanism comprises a guide ring 11, a flat threaded disc 13, a driving assembly, a plurality of racks 17 and a sealing assembly, the guide ring 11 is fixedly installed on one side of the inner wall of the annular groove, a plurality of guide grooves 12 are formed on one side of the guide ring 11, a plurality of racks 17 are slidingly installed on one side of the guide ring 11, the plurality of racks 17 are each provided with a protrusion, the plurality of protrusions are slidingly installed in the corresponding guide grooves 12, the flat threaded disc 13 is rotatably installed on the other side of the inner wall of the annular groove, the driving assembly is arranged on the flat threaded disc 13, the plurality of racks 17 are each adapted to the same flat threaded disc 13, and the plurality of racks 17 are each provided with a sealing assembly.

[0026] In the embodiment, the driving assembly comprises an external tooth gear 14, a driving gear 15 and a servo motor 16, the external tooth gear 14 is fixedly sleeved on the outer side of the flat threaded disc 13, the driving gear 15 is rotatably installed on one side of the inner wall of the annular groove, the driving gear 15 is engaged with the external tooth gear 14, the motor groove is formed in the inside of the valve body 1, the servo motor 16 is fixedly installed on one side of the inner wall of the motor groove, and the output shaft of the servo motor 16 is fixedly connected with the driving gear 15. The driving gear 15 can be driven to rotate by the servo motor 16.

[0027] In the embodiment, the sealing assembly comprises a sealing metal block 18 and a sealing rubber strip 19, the sealing metal block 18 is fixedly installed on one side of the rack 17, the sealing rubber strip 19 is fixedly installed on one side of the sealing metal block 18, and the sealing rubber strip 19 is in contact with the corresponding semicircular valve plate 7, so that the sealing effect of the valve is facilitated to be improved.

[0028] Working principle: when the valve needs to be closed, the electric control module 3 drives the valve rod 4 to rotate, the valve rod 4 drives the two semicircular valve plates 7 to rotate, and the medium flowing in the valve body 1 is intercepted, when the valve rod 4 rotates to the specified position, the electric control module 3 starts the servo motor 16, the servo motor 16 drives the driving gear 15 to rotate, the driving gear 15 drives the outer gear 14 to rotate, the outer gear 14 drives the flat threaded disc 13 to rotate, the flat threaded disc 13 drives the plurality of racks 17 to move, the plurality of racks 17 are provided with protrusions on one side, the plurality of protrusions are slidably installed in the corresponding guide grooves 12 of the guide ring 11, the guide grooves 12 can assist the rack 17 to move, and the movement track is limited, so that it can only be expanded or contracted, the plurality of racks 17 drive the corresponding sealing metal blocks 18 to move close to each other, the plurality of sealing metal blocks 18 are in contact with each other, at this time, the plurality of sealing metal blocks 18 block the small gap between the valve body 1 and the two semicircular valve plates 7, and the sealing rubber strip 19 on the plurality of sealing metal blocks 18 is also in contact with the corresponding semicircular valve plate 7, so that the sealing effect of the valve is effectively improved, when the sealing rubber ring 10 is washed for a long time and the sealing effect is poor, the sealing structure can effectively prevent the medium from leaking, and the valve plate mechanism is arranged, so that the semicircular valve plate 7 can be quickly disassembled by the worker through the bolt 9, and the semicircular valve plate 7 and the sealing rubber ring 10 can be replaced, the practicability and durability of the equipment are improved.

[0029] The utility model discloses relative to prior art obtained technical progress is: can prevent sealing rubber ring 10 in the medium long time washes after the sealing effect drops the situation, through the closed mechanism, can block the small gap between semicircular valve plate 7 and valve body 1, effectively prevent the leakage of medium, and through the valve plate mechanism that is arranged, can quickly replace, install semicircular valve plate 7, effectively improve the convenience of equipment.

Claims

1. A triple offset butterfly valve suitable for use in highly corrosive media, characterized in that, Including the valve body (1), the bottom of the valve body (1) is fixedly installed with the base (2), the top of the valve body (1) is rotatably installed with the valve stem (4), both sides of the valve stem (4) are provided with valve plate mechanism; The inside of the valve body (1) is provided with an annular groove, and the inside of the annular groove is provided with a sealing mechanism.

2. The triple offset butterfly valve suitable for strong corrosive medium according to claim 1, characterized in that, The top of the valve body (1) is fixedly installed with an electric control module (3), and the output shaft of the electric control module (3) is fixedly connected with the valve stem (4).

3. The triple offset butterfly valve suitable for use in highly corrosive media according to claim 1, wherein, The valve plate mechanism includes a connecting metal block (5), a semicircular valve plate (7) and a bolt assembly, one side of the valve stem (4) is fixedly installed with a connecting metal block (5), one side of the valve stem (4) is provided with a semicircular valve plate (7), one side of the semicircular valve plate (7) is provided with a connecting groove (6), the connecting metal block (5) and the connecting groove (6) are matched, and the inside of the connecting groove (6) is provided with a bolt assembly.

4. The triple offset butterfly valve suitable for use in highly corrosive media according to claim 3, characterized in that, The bolt assembly includes two nuts (8) and two bolts (9), two nuts (8) are fixedly installed on one side of the inner wall of the connecting groove (6), and two bolts (9) are slidably installed on one side of the connecting metal block (5). Two bolts (9) are respectively screwed with corresponding nuts (8).

5. A triple offset butterfly valve suitable for use in highly corrosive media according to claim 4, wherein, The outside of the two semicircular valve plates (7) is fixedly sleeved with the same sealing rubber ring (10).

6. A triple offset butterfly valve suitable for use in highly corrosive media according to claim 5, wherein, The sealing mechanism includes a guide ring (11), a flat threaded disc (13), a driving assembly, a plurality of racks (17) and a sealing assembly, a guide ring (11) is fixedly installed on one side of the inner wall of the annular groove, a plurality of guide grooves (12) are formed in one side of the guide ring (11), a plurality of racks (17) are slidably installed on one side of the guide ring (11), one side of each of the plurality of racks (17) is provided with a protrusion, and each of the plurality of protrusions is slidably installed in a corresponding guide groove (12). A flat threaded disc (13) is rotatably installed on the other side of the inner wall of the annular groove, the flat threaded disc (13) is provided with a driving assembly, each of the plurality of racks (17) is matched with the same flat threaded disc (13), and one side of each of the plurality of racks (17) is provided with a sealing assembly.

7. A triple offset butterfly valve suitable for use in highly corrosive media according to claim 6, wherein, The driving assembly includes an external tooth gear (14), a driving gear (15) and a servo motor (16), the outside of the flat threaded disc (13) is fixedly sleeved with an external tooth gear (14), a driving gear (15) is rotatably installed on one side of the inner wall of the annular groove, the driving gear (15) is engaged with the external tooth gear (14), a motor groove is formed in the inside of the valve body (1), a servo motor (16) is fixedly installed on one side of the inner wall of the motor groove, and the output shaft of the servo motor (16) is fixedly connected with the driving gear (15).

8. A triple offset butterfly valve suitable for use in highly corrosive media according to claim 7, wherein, The sealing assembly includes a sealing metal block (18) and a sealing rubber strip (19), the sealing metal block (18) is fixedly installed on one side of the rack (17), the sealing rubber strip (19) is fixedly installed on one side of the sealing metal block (18), and the sealing rubber strip (19) is in contact with the corresponding semicircular valve plate (7).

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