CN211901622U

CN211901622U - Flange type worm butterfly valve

Info

Publication number: CN211901622U
Application number: CN201922419614.4U
Authority: CN
Inventors: 吴福全
Original assignee: Guangzhou Jiafusi Valve Making Co ltd
Current assignee: Guangzhou Jiafusi Valve Making Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-11-10
Anticipated expiration: 2029-12-26

Abstract

The utility model relates to a flange formula worm wheel butterfly valve, which comprises a valve body, the valve plate, the valve rod, the hand wheel, worm gear transmission and indicating device, worm gear transmission fixed mounting is at the valve neck top, worm gear transmission includes lower, the upper cover, worm and worm wheel, worm wheel fixed mounting is in the upper end of valve rod, the worm is rotationally installed at the upper cover, the upper cover is sealed to close in lower seat top, the input of worm is worn out from the lateral wall of upper cover, and be connected with hand wheel drive, indicating device includes the indicating dish, the pointer, transparent plate and gland, the indicating dish is fixed on the interior top surface of upper cover, the pointer pass the centre bore of indicating dish and with the upper end fixed connection of valve rod, it has the mounting hole to cover on, the transparent plate passes through gland fixed mounting in this mounting hole. The utility model has the advantages that: the structure is simple, the operation is convenient, and the labor is saved; the number indicating device is arranged, the rotating angle of the pointer can be visually observed through the transparent plate, and the sealing performance of the butterfly valve is improved.

Description

Flange type worm butterfly valve

Technical Field

The utility model relates to the technical field of valves, especially flange formula worm wheel butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.

The hand wheel of the butterfly valve in the prior art is directly connected with the vertical adjusting rod of the butterfly valve, so that the butterfly valve is inconvenient to operate, does not have a labor-saving structure, has large resistance in the process of adjusting the butterfly plate, and is relatively labor-consuming to operate. The opening indicating number of the valve is that a pointer is fixed at the top end of a valve rod and extends out of a top cover, opening and closing indicating scales are arranged on the top cover, however, the pointer extends out of the top cover and meets the condition of free rotation, the sealing performance of the valve is difficult to guarantee naturally, and the driving part of the butterfly valve and even the sealing performance of the valve body are affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a flange formula worm wheel butterfly valve.

The purpose of the utility model is realized through the following technical scheme: a flange type worm wheel butterfly valve comprises a valve body, a valve plate, a valve rod and a hand wheel, wherein the valve body comprises an inlet and outlet passage and flanges arranged at two ends of the inlet and outlet passage, the valve plate is rotatably arranged in the inlet and outlet passage, the lower end of the valve rod penetrates through the side wall of the inlet and outlet passage along the radial direction of the inlet and outlet passage and is connected with the valve plate, the upper end of the valve rod is connected with the hand wheel in a transmission manner, the valve rod further comprises a worm and gear transmission device and a number indicating device, the upper end of the valve rod is connected with the hand wheel in a transmission manner through the worm and gear transmission device, a valve neck for the valve rod to penetrate through is integrally formed on the side wall of the inlet and outlet passage, the worm and gear transmission device is fixedly arranged at the top of the valve neck, the worm and gear transmission device comprises a lower seat, an upper cover, the sealed lid of upper cover closes in lower seat top, the input of worm is worn out from the lateral wall of upper cover to be connected with hand wheel transmission, the registration device includes registration plate, pointer, transparent plate and gland, the registration plate is fixed on the interior top surface of upper cover, just registration plate and the coaxial setting of valve rod, the pointer pass the centre bore of registration plate and with the upper end fixed connection of valve rod, it has the mounting hole to cover to open on, the transparent plate passes through gland fixed mounting in this mounting hole.

Furthermore, the inner wall of the inlet and outlet channel is lined with a sealing surface, the inner diameter of the sealing surface is gradually increased from the middle to two sides, and the edge of the cylindrical surface of the valve plate is in interference fit with the middle of the sealing surface.

Further, the sealing surface is a rubber sealing surface.

Furthermore, the lower end of the valve rod is provided with a square head, and the edge of the cylindrical surface of the valve plate is provided with a square hole matched with the square head.

Further, still be provided with the spacing subassembly of valve plate on the lateral wall of access way, the spacing subassembly of valve plate includes fixing base and spacing axle, fixing base integrated into one piece is on the lateral wall of access way, the one end of spacing axle is fixed in the fixing base, and the other end passes access way and sealed face along access way's radial to with the cooperation of pegging graft in the cylinder edge of valve plate, spacing axle is coaxial with the valve rod.

Furthermore, the limiting shaft is locked and fixed in the fixing seat through a screw, and a pressing sleeve is arranged between the inner wall of the fixing seat and the outer wall of the limiting shaft.

Furthermore, a tie bar is arranged on the outer wall of the access passage along the axial direction of the access passage, and two ends of the tie bar extend to the side walls of the flanges on the corresponding sides respectively.

Furthermore, the cross section of the valve neck is of a rectangular structure, and four corners of the valve neck are respectively provided with a chamfer.

Furthermore, a sealing groove is formed in the center of the top end face of the valve neck, sealing filler is filled in the sealing groove, and the lower seat is locked and fixed on the top end face of the valve neck through bolts and compresses the sealing filler.

Further, the worm wheel is a sector worm wheel.

The utility model has the advantages of it is following:

1. the utility model discloses a worm gear transmission transmits, simple structure, convenient operation, and laborsaving, and operating personnel just can rotate the valve plate under less driving force effect. The worm gear structure has rationally utilized the structural space of valve for the hand wheel can set up the one side at the butterfly valve, has reduced the height of butterfly valve to a certain extent.

2. The utility model discloses set up the registration device in worm gear transmission top, the turned angle of pointer is observed directly perceivedly to this registration device accessible transparent plate, and the rotation of pointer is synchronous with the rotation of valve rod to the turned angle of valve plate can directly be read out, the pointer need not be worn out from the upper cover, is favorable to improving the leakproofness of butterfly valve.

3. The side wall of the inlet and outlet channel of the valve body is provided with the plurality of tie bars, so that the structural strength of the inlet and outlet channel of the valve body is improved.

4. The utility model discloses a valve plate adopts "no round pin structure", and the valve rod does not directly run through the cylinder edge of valve plate promptly, but has adopted the cooperation of pegging graft respectively in both ends about the valve plate, has improved the flow of valve when opening.

5. The inlet and outlet channel is lined with a rubber sealing surface which is matched with the edge of the cylindrical surface of the valve plate, and the inner diameter of the rubber sealing surface adopts a structure with small middle part and large two sides, so that the sealing performance of the sealing position is good, the rubber materials needed by other positions are less, and the inner diameter of the inlet and outlet channel of the valve is prevented from sudden change.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic perspective view of the present invention;

fig. 3 is a schematic view of the local explosion structure of the present invention;

FIG. 4 is a schematic longitudinal sectional view of the present invention;

in the figure: 1-valve body, 1 a-inlet and outlet channel, 1 b-flange, 1 c-sealing surface, 1 d-valve neck, 1d 1-sealing groove, 1d 2-sealing filler, 1 e-tie bar, 2-valve plate, 3-valve rod, 4-worm gear, 4 a-lower seat, 4 b-upper cover, 4b 1-mounting hole, 4 c-worm, 4 d-worm wheel, 5-handwheel, 6-number indicating device, 6 a-number indicating disc, 6 b-pointer, 6 c-transparent plate, 6 d-gland, 7-valve plate limiting component, 7 a-fixing seat, 7 b-pressing sleeve and 7 c-limiting shaft.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1 to 4, the flange type worm gear butterfly valve includes a valve body 1, a valve plate 2, a valve rod 3 and a hand wheel 5, the valve body 1 includes an inlet and outlet passage 1a and flanges 1b arranged at two ends of the inlet and outlet passage 1a, the valve plate 2 is rotatably installed in the inlet and outlet passage 1a, the lower end of the valve rod 3 radially penetrates through the side wall of the inlet and outlet passage 1a and is connected with the valve plate 2, the upper end of the valve rod 3 is in transmission connection with the hand wheel 5, the flange type worm gear butterfly valve further includes a worm gear 4 and a number indicating device 6, the upper end of the valve rod 3 is in transmission connection with the hand wheel 5 through the worm gear 4, a valve neck 1d for the valve rod 3 to penetrate is integrally formed on the side wall of the inlet and outlet passage 1a, the worm gear 4 is fixedly installed at the top of the valve neck 1d, the worm gear 4 includes a lower seat 4a, The numerical control valve comprises an upper cover 4b, a worm 4c and a worm wheel 4d, wherein the lower seat 4a is fixedly arranged at the top of a valve neck 1d, the worm wheel 4d is fixedly arranged at the upper end of a valve rod 3, the worm 4c is rotatably arranged on the upper cover 4b, the upper cover 4b is sealed and closed above the lower seat 4a, in the embodiment, a gasket is padded between contact surfaces of the upper cover 4b and the lower seat 4a to ensure the sealing performance of the upper cover 4b, the input end of the worm 4c penetrates out of the side wall of the upper cover 4b and is in transmission connection with a hand wheel 5, the numerical device 6 comprises a numerical disc 6a, a pointer 6b, a transparent plate 6c and a gland 6d, the numerical disc 6a is fixed on the inner top surface of the upper cover 4b, the numerical disc 6a is coaxially arranged with the valve rod 3, the pointer 6b penetrates through a central hole of the numerical disc 6a and is fixedly connected with the upper end of the valve rod 3, a mounting hole 4b1 is, the transparent plate 6c is fixedly installed in the installation hole 4b1 through a pressing cover 6 d. When the hand wheel 5 drives the worm 4c to rotate, the worm 4c drives the worm wheel 4d to rotate, the worm wheel 4d and the valve rod 3 are fixed into a whole, so that the valve rod 3 rotates along with the rotation of the worm wheel 4d, and finally the valve plate 2 rotates to open and close the valve. When the valve rod 3 rotates, the pointer 6b at the top end rotates along with the valve rod, and rotates relative to the number indicating disc 6a, so that the opening degree indication of the valve is realized, and the valve rod is sealed by the transparent plate 6c and the gland 6d, so that external water can be prevented from entering the worm gear transmission device 4.

Furthermore, the inner wall of the inlet/outlet channel 1a is lined with a sealing surface 1c, the inner diameter of the sealing surface 1c gradually increases from the middle to both sides, and the edge of the cylindrical surface of the valve plate 2 is in interference fit with the middle part of the sealing surface 1 c. In the present embodiment, the seal surface 1c is preferably a rubber seal surface. The sealing performance of the sealing position is guaranteed to be good, meanwhile, rubber materials needed by other positions are few, and sudden change of the inner diameter of the inlet and outlet channel of the valve is avoided.

Furthermore, the lower extreme of valve rod 3 has the square head, be equipped with on the cylinder edge of valve plate 2 with square head assorted square hole. When the valve rod 3 is rotated, the square head is matched with the square hole, so that the transmission of the driving force is realized.

Further, still be provided with the spacing subassembly 7 of valve plate on the lateral wall of access way 1a, the spacing subassembly 7 of valve plate includes fixing base 7a and spacing axle 7c, fixing base 7a integrated into one piece is on the lateral wall of access way 1a, the one end of spacing axle 7c is fixed in fixing base 7a, and the other end passes access way 1a and sealed face 1c along access way 1 a's radial to with the cooperation of pegging graft in the cylinder edge of valve plate 2, spacing axle 7c is coaxial with valve rod 3. The valve plate regulating member 7 functions to regulate the oscillation of the valve plate 2 occurring in the axial direction of the inlet/outlet passage 1a, and when the valve plate 2 is rotated by the valve rod 3, the valve plate 2 and the regulating shaft 7c are relatively rotated.

Further, the limiting shaft 7c is locked and fixed in the fixing seat 7a through a screw, and a pressing sleeve 7b is arranged between the inner wall of the fixing seat 7a and the outer wall of the limiting shaft 7 c. The screw and the pressing sleeve 7b ensure that the limiting shaft 7c does not rotate, and the friction loss between the limiting shaft 7c and the valve body 1a or the sealing surface 1c is reduced, so that the service life of the valve can be prolonged, and the sealing performance of the valve can be improved.

Furthermore, a tie bar 1e is arranged on the outer wall of the access passage 1a along the axial direction thereof, and two ends of the tie bar 1e extend to the side walls of the flanges 1b on the corresponding sides respectively. The structural strength of the inlet/outlet passage 1a of the valve body 1 is improved.

Further, the cross section of the valve neck 1d is a rectangular structure, and four corners of the cross section are respectively provided with a chamfer.

Furthermore, a sealing groove 1d1 is arranged at the center of the top end face of the valve neck 1d, a sealing filler 1d2 is filled in the sealing groove 1d1, and the lower seat 4a is fixed on the top end face of the valve neck 1d through bolt locking and presses the sealing filler 1d2. Prevent to take place between the contact surface between valve neck 1d and the lower seat 4a and leak the phenomenon, receive compression time overlength when sealing filler 1d2, when sealing performance reduces, through further locking bolt for sealing filler 1d2 further compresses tightly and realizes sealedly, when locking to the limit after, needs to change sealing filler 1d2.

Further, the worm wheel 4d is a sector worm wheel. Because the butterfly valve is characterized in that the butterfly valve only needs to rotate 90 degrees, the worm wheel 4d does not need to be a whole circle structure, and only needs to be a fan-shaped worm wheel not less than 90 degrees, so that the installation space is saved, and the material and manufacturing cost of the worm wheel 4d are reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Flange formula worm wheel butterfly valve, including valve body (1), valve plate (2), valve rod (3) and hand wheel (5), valve body (1) includes access way (1a), sets up in flange (1b) at access way (1a) both ends, valve plate (2) rotationally install in access way (1a), the lateral wall of access way (1a) is radially passed along access way (1a) to the lower extreme of valve rod (3) to be connected with valve plate (2), the upper end and the hand wheel (5) transmission of valve rod (3) are connected, its characterized in that: the valve rod assembly is characterized by further comprising a worm gear transmission device (4) and a number indicating device (6), the upper end of the valve rod (3) is in transmission connection with a hand wheel (5) through the worm gear transmission device (4), a valve neck (1d) for the valve rod (3) to pass through is integrally formed on the side wall of the inlet and outlet channel (1a), the worm gear transmission device (4) is fixedly installed at the top of the valve neck (1d), the worm gear transmission device (4) comprises a lower seat (4a), an upper cover (4b), a worm (4c) and a worm wheel (4d), the lower seat (4a) is fixedly installed at the top of the valve neck (1d), the worm wheel (4d) is fixedly installed at the upper end of the valve rod (3), the worm (4c) is rotatably installed on the upper cover (4b), the upper cover (4b) is closed above the lower seat (4a), and the input end of the worm (4c) penetrates out of the side wall of the upper cover (4b), and be connected with hand wheel (5) transmission, registration device (6) are including registration dish (6a), pointer (6b), transparent plate (6c) and gland (6d), registration dish (6a) are fixed on the interior top surface of upper cover (4b), just registration dish (6a) and valve rod (3) coaxial setting, pointer (6b) pass the centre bore of registration dish (6a) and with the upper end fixed connection of valve rod (3), it has mounting hole (4b1) to open on upper cover (4b), transparent plate (6c) are through gland (6d) fixed mounting in this mounting hole (4b 1).

2. The flange-type worm-gear butterfly valve of claim 1, wherein: the inner wall of the inlet and outlet channel (1a) is lined with a sealing surface (1c), the inner diameter of the sealing surface (1c) is gradually increased from the middle to two sides, and the edge of the cylindrical surface of the valve plate (2) is in interference fit with the middle part of the sealing surface (1 c).

3. The flange-type worm-gear butterfly valve of claim 2, wherein: the sealing surface (1c) is a rubber sealing surface.

4. The flange-type worm-gear butterfly valve of claim 2, wherein: the lower end of the valve rod (3) is provided with a square head, and the edge of the cylindrical surface of the valve plate (2) is provided with a square hole matched with the square head.

5. The flange-type worm-gear butterfly valve of claim 4, wherein: still be provided with spacing subassembly of valve plate (7) on the lateral wall of access way (1a), the spacing subassembly of valve plate (7) are including fixing base (7a) and spacing axle (7c), fixing base (7a) integrated into one piece is on the lateral wall of access way (1a), the one end of spacing axle (7c) is fixed in fixing base (7a), and access way (1a) and sealed face (1c) are radially passed along access way (1a) to the other end to peg graft the cooperation with the cylinder edge of valve plate (2), spacing axle (7c) are coaxial with valve rod (3).

6. The flange-type worm-gear butterfly valve of claim 5, wherein: the limiting shaft (7c) is locked and fixed in the fixing seat (7a) through a screw, and a pressing sleeve (7b) is arranged between the inner wall of the fixing seat (7a) and the outer wall of the limiting shaft (7 c).

7. The flange-type worm-gear butterfly valve of claim 1, wherein: and a lacing wire (1e) is arranged on the outer wall of the access passage (1a) along the axial direction of the access passage, and two ends of the lacing wire (1e) respectively extend to the side walls of the flanges (1b) on the corresponding sides.

8. The flange-type worm-gear butterfly valve of claim 1, wherein: the cross section of the valve neck (1d) is of a rectangular structure, and four corners of the cross section are respectively provided with a chamfer.

9. The flange-type worm-gear butterfly valve of claim 1 or 8, wherein: the valve is characterized in that a sealing groove (1d1) is formed in the center of the top end face of the valve neck (1d), sealing filler (1d2) is filled in the sealing groove (1d1), the lower seat (4a) is fixed to the top end face of the valve neck (1d) through bolt locking, and the sealing filler (1d2) is compressed.

10. The flange-type worm-gear butterfly valve of claim 1, wherein: the worm wheel (4d) is a sector worm wheel.