CN221943217U - Special butterfly valve for exhaust passage - Google Patents

Abstract

The special butterfly valve for the exhaust passage comprises a valve seat, wherein a supporting frame is arranged on the valve seat, a transmission indicating structure is arranged on the supporting frame, a rotating structure is arranged on the supporting frame, and a limiting structure is arranged on the supporting frame; the utility model relates to the technical field of butterfly valves, and the beneficial effects of the scheme are as follows: the scheme is provided with a transmission indicating structure, the pointer rotates along with the valve rod, a plurality of indicating strips can prompt the rotation angle of the pointer, the pawl is matched with the ratchet wheel in an active mode, the valve rod is prevented from rotating in the reverse direction, the shifting rod can drive the sliding plate to slide in the transmission box to control the shifting plate to enter a plurality of notches through the limiting structure, the problem that when an existing cylinder is used for controlling the opening and closing of a butterfly valve, the cylinder is required to be connected with an external electric part to control the stroke, the rotation of the butterfly plate is controlled through the cylinder, the flow is controlled to be complicated and inaccurate, and the cylinder can not be used when an electric fault occurs is solved.

Description

A butterfly valve for exhaust duct

Technical Field

The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve dedicated to an exhaust passage.

Background Art

Butterfly valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. They mainly play the role of cutting off and throttling in pipelines. Butterfly valves, also known as flap valves, are a type of regulating valve with a simple structure. The butterfly valve opening and closing part is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulation.

The existing Chinese utility model application number is CN202120313883.7, which discloses an exhaust valve opening device including a flue gas collecting butterfly valve, a first drive rack, a second drive rack, a slider bracket, a valve core gear, a butterfly valve opening cylinder and a butterfly valve closing cylinder. The slider bracket is arranged on the side of the flue gas collecting butterfly valve, and the valve core gear is arranged in the slider bracket. The valve core gear is coaxially arranged with the valve stem of the flue gas collecting butterfly valve; the first drive rack and the second drive rack are penetrated in the slider bracket, and the first drive rack and the second drive rack are respectively meshed with the valve core gear; the piston of the butterfly valve opening cylinder is opposite to the first drive rack, and the piston of the butterfly valve closing cylinder is opposite to the second drive rack, and the process of manually opening and closing the valve can be omitted, thereby improving production efficiency.

However, the above patent document has the following problems: the cylinder needs to be connected to external electrical parts to control the stroke, and the process of controlling the butterfly plate rotation through the cylinder to control the flow is relatively cumbersome and has low accuracy. In addition, when an electrical failure occurs, the cylinder cannot be used, which delays the smoke exhaust efficiency. In view of this, this case has arisen.

Utility Model Content

In order to solve the above problems, the utility model is implemented through the following technical solutions: a butterfly valve dedicated to an exhaust duct, comprising a valve seat, a support frame is provided on the valve seat, a transmission indicating structure is provided on the support frame, a rotating structure is provided on the support frame, and a limit structure is provided on the support frame;

The transmission indication structure includes: a valve stem, a butterfly plate, a working box, a worm, a turbine, an indicator disk, a plurality of indicator bars and a pointer; the working box is installed on the support frame, the valve stem is movably installed on the support frame and one end of the valve stem enters the valve seat and the other end passes through the side wall of the working box, the butterfly plate is installed at one end of the valve stem and the butterfly plate is arranged in the valve seat, the turbine is installed in the working box and the turbine is connected to the valve stem, the worm is movably installed in the working box and one end of the worm passes through the side wall of the working box, the indicator disk is installed on the working box, the plurality of indicator bars are arranged in a ring on the indicator disk, and the pointer is installed at one end of the valve stem away from the butterfly plate.

Preferably, a rotating handle is provided on the side wall of the working box and the rotating handle is connected to one end of the worm.

Preferably, the rotating structure comprises: a ratchet, a pawl, a connecting rod and a tension spring;

The connecting rod is movably mounted on the supporting frame, the ratchet is mounted on the valve stem, the pawl is mounted on the connecting rod and the pawl is movably connected to the ratchet, one end of the tension spring is mounted on the supporting frame and the other end of the tension spring is mounted on the pawl.

Preferably, the limiting structure comprises: a rotating plate, a plurality of notches, a transmission box, a slide groove, a stop plate, a sliding plate, a lever and a telescopic spring;

The rotating plate is installed on the valve stem, the plurality of notches are provided on the rotating plate, the transmission box is installed on the support frame, the slide groove is provided on the transmission box, the sliding plate is slidably provided in the transmission box, the support plate is installed on the sliding plate and one end of the support plate passes through the transmission box, the telescopic spring is installed on the lower wall surface of the transmission box and one end of the telescopic spring is installed on the sliding plate, the shift rod is installed on the sliding plate and the shift rod is movably connected to the slide groove.

Preferably, the valve stem and the butterfly plate are connected by a pin.

Preferably, the lever is provided with anti-slip grooves.

Beneficial Effects

The utility model provides a butterfly valve specially used for exhaust duct, which has the following beneficial effects: a transmission indicating structure is provided in the present invention, and a pointer follows the rotation of the valve stem, and a plurality of indicating bars can prompt the rotation angle of the pointer, and the pawl and the ratchet wheel are movably connected and cooperated to prevent the valve stem from rotating in the reverse direction, and the lever in the limiting structure can drive the sliding plate to slide in the transmission box to control the abutment plate to enter a plurality of slots, thereby solving the problem that when the existing cylinder controls the butterfly valve to open and close, the cylinder needs to be connected to an external electrical component to control the stroke, and the flow rate is controlled by controlling the rotation of the butterfly plate through the cylinder, which is rather cumbersome and inaccurate, and the cylinder cannot be used when an electrical failure occurs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the front view of a butterfly valve for exhaust duct according to the utility model.

FIG. 2 is a schematic diagram of the top view of the structure of a butterfly valve dedicated to an exhaust duct according to the present invention.

FIG3 is a schematic diagram of the partially enlarged structure of FIG1 of a butterfly valve dedicated to an exhaust duct according to the utility model.

FIG. 4 is a schematic diagram of the internal structure of a transmission box of a butterfly valve dedicated to an exhaust duct according to the present invention.

FIG. 5 is a schematic diagram of the three-dimensional structure of an indicator disk of a butterfly valve dedicated to an exhaust duct according to the utility model.

FIG6 is a schematic diagram of the three-dimensional structure of a rotating plate of a butterfly valve dedicated to an exhaust duct according to the utility model.

In the figure: 1, valve seat, 2, support frame, 3, valve stem, 4, butterfly plate, 5, working box, 6, worm, 7, turbine, 8, indicator plate, 9, indicator bar, 10, pointer, 11, turning handle, 12, ratchet, 13, pawl, 14, connecting rod, 15, rotating plate, 16, notch, 17, transmission box, 18, slide groove, 19, abutment plate, 20, sliding plate, 21, telescopic spring, 22, tension spring.

DETAILED DESCRIPTION

Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Please refer to Figures 1-6. The utility model provides a technical solution: a butterfly valve for exhaust duct, comprising a valve seat 1, a support frame 2 is provided on the valve seat 1, a transmission indicating structure is provided on the support frame 2, a rotating structure is provided on the support frame 2, and a limiting structure is provided on the support frame 2;

The transmission indication structure includes: a valve stem 3, a butterfly plate 4, a working box 5, a worm 6, a turbine 7, an indicator disk 8, a plurality of indicator bars 9 and a pointer 10; the working box 5 is installed on the support frame 2, the valve stem 3 is movably installed on the support frame 2 and one end of the valve stem 3 enters the valve seat 1 and the other end passes through the side wall of the working box 5, the butterfly plate 4 is installed at one end of the valve stem 3 and the butterfly plate 4 is arranged in the valve seat 1, the turbine 7 is installed in the working box 5 and the turbine 7 is connected to the valve stem 3, the worm 6 is movably installed in the working box 5 and one end of the worm 6 passes through the side wall of the working box 5, the indicator disk 8 is installed on the working box 5, the plurality of indicator bars 9 are arranged in a ring on the indicator disk 8, and the pointer 10 is installed at the end of the valve stem 3 away from the butterfly plate 4.

It should be noted that the butterfly plate 4 is located in the valve seat 1, and the valve stem 3 controls the butterfly plate 4 to rotate in the valve seat 1, so as to facilitate the control of the flow rate. The valve stem 3 on the turbine 7 can be driven to rotate through the worm 6, and the pointer 10 rotates with the valve stem 3. Several indicator bars 9 can prompt the rotation angle of the pointer 10, so as to facilitate the adjustment of the flow rate.

In the specific implementation process, further, a rotating handle 11 is provided on the side wall of the working box 5 and the rotating handle 11 is connected to one end of the worm 6 .

It should be noted that rotating the handle 11 facilitates rotating the worm 6 .

In the specific implementation process, the rotating structure includes: a ratchet 12, a pawl 13, a connecting rod 14 and a tension spring 22;

The connecting rod 14 is movably mounted on the support frame 2, the ratchet 12 is mounted on the valve stem 3, the pawl 13 is mounted on the connecting rod 14 and the pawl 13 is movably connected to the ratchet 12, one end of the tension spring 22 is mounted on the support frame 2 and the other end of the tension spring 22 is mounted on the pawl 13.

It should be noted that the ratchet 12 rotates with the valve stem 3 to prevent the butterfly plate 4 from rotating in the reverse direction after the flow rate is adjusted, and the tension spring 22 can make the pawl 13 movably connected to the ratchet 12 .

In the specific implementation process, the limiting structure includes: a rotating plate 15, a plurality of notches 16, a transmission box 17, a slide slot 18, a stop plate 19, a sliding plate 20, a lever and a telescopic spring 21;

The rotating plate 15 is installed on the valve stem 3, the plurality of notches 16 are provided on the rotating plate 15, the transmission box 17 is installed on the support frame 2, the slide groove 18 is provided on the transmission box 17, the sliding plate 20 is slidably provided in the transmission box 17, the abutment plate 19 is installed on the sliding plate 20 and one end of the abutment plate 19 passes through the transmission box 17, the telescopic spring 21 is installed on the lower wall surface of the transmission box 17 and one end of the telescopic spring 21 is installed on the sliding plate 20, the shift rod is installed on the sliding plate 20 and the shift rod is movably connected to the slide groove 18.

It should be noted that the rotating plate 15 rotates with the valve stem 3, the lever can drive the sliding plate 20 to slide in the transmission box 17, and the telescopic spring 21 follows the telescopic movement, thereby controlling the abutment plate 19 to enter the plurality of slots 16, so as to facilitate position limiting and accurately control its flow rate.

In the specific implementation process, further, the valve stem 3 and the butterfly plate 4 are connected by a pin.

It should be noted that the pin connection structure is simple and can be assembled and disassembled multiple times.

In the specific implementation process, further, the lever is provided with anti-slip grooves.

It should be noted that it is convenient to push the lever and reduce the chance of the lever slipping out of your hand when moving it.

Working principle of the device: the valve seat 1 can be connected with the corresponding pipeline flange, the lever is pulled, the lever drives the sliding plate 20 to slide in the transmission box 17, the sliding plate 20 drives the abutment plate 19 away from the plurality of notches 16, the rotating handle 11 is turned, the worm 6 rotates in the working box 5, the turbine 7 drives the valve stem 3 to rotate on the support frame 2 under the action of the worm 6, the butterfly plate 4 rotates with the valve stem 3, and the flow rate can be adjusted. During the rotation of the valve stem 3, the ratchet 12 also rotates, and the ratchet 13 is movably connected with the ratchet 12 under the action of the tension spring 22. , the pointer 10 rotates with the valve stem 3, and the pointer 10 can correspond to the indicator bar 9 on the indicator disk 8, which is convenient for observing the opening and closing angles, and then convenient for controlling the flow. After the butterfly plate 4 opens and closes, the worm 6 stops rotating, and the pawl 13 resists the ratchet 12 to prevent the butterfly plate 4 from rotating in the opposite direction. At this time, the lever is released, and the telescopic spring 21 is reset. Under the action of the telescopic spring 21, the sliding plate 20 drives the plate 19 to slide into the plurality of notches 16. At this time, the plate 19 is movably connected with the plurality of notches 16, and the valve stem 3 cannot rotate, which is convenient for accurately controlling the flow.

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

Claims (6)

1. A butterfly valve for exhaust duct, comprising a valve seat (1), characterized in that a support frame (2) is provided on the valve seat (1), the support frame (2) is provided with a transmission indicating structure, the support frame (2) is provided with a rotating structure, and the support frame (2) is provided with a limiting structure; The transmission indicating structure comprises: a valve stem (3), a butterfly plate (4), a working box (5), a worm gear (6), a turbine (7), an indicating plate (8), a plurality of indicating bars (9) and a pointer (10); the working box (5) is mounted on the supporting frame (2); the valve stem (3) is movably mounted on the supporting frame (2) and one end of the valve stem (3) enters the valve seat (1) and the other end passes through the side wall of the working box (5); the butterfly plate (4) is mounted on one end of the valve stem (3) and the butterfly plate (4) The valve seat (1) is provided in the turbine (7) which is installed in the working box (5) and the turbine (7) is connected to the valve stem (3). The worm (6) is movably installed in the working box (5) and one end of the worm (6) passes through the side wall of the working box (5). The indicator plate (8) is installed on the working box (5). The plurality of indicator bars (9) are arranged in a ring shape on the indicator plate (8). The pointer (10) is installed on the end of the valve stem (3) away from the butterfly plate (4). 2. A butterfly valve for exhaust duct according to claim 1, characterized in that a rotating handle (11) is provided on the side wall of the working box (5) and the rotating handle (11) is connected to one end of the worm (6). 3. The butterfly valve for exhaust duct according to claim 1, characterized in that the rotating structure comprises: a ratchet (12), a ratchet pawl (13), a connecting rod (14) and a tension spring (22); The connecting rod (14) is movably mounted on the support frame (2), the ratchet (12) is mounted on the valve stem (3), the pawl (13) is mounted on the connecting rod (14) and the pawl (13) is movably connected to the ratchet (12), one end of the tension spring (22) is mounted on the support frame (2) and the other end of the tension spring (22) is mounted on the pawl (13). 4. A butterfly valve for exhaust duct according to claim 1, characterized in that the limiting structure comprises: a rotating plate (15), a plurality of notches (16), a transmission box (17), a slide groove (18), a stop plate (19), a sliding plate (20), a lever and a telescopic spring (21); The rotating plate (15) is mounted on the valve stem (3), the plurality of notches (16) are arranged on the rotating plate (15), the transmission box (17) is mounted on the support frame (2), the slide groove (18) is arranged on the transmission box (17), the sliding plate (20) is slidably arranged in the transmission box (17), the abutment plate (19) is mounted on the sliding plate (20) and one end of the abutment plate (19) passes through the transmission box (17), the telescopic spring (21) is mounted on the lower wall surface of the transmission box (17) and one end of the telescopic spring (21) is mounted on the sliding plate (20), the shifting rod is mounted on the sliding plate (20) and the shifting rod is movably connected to the slide groove (18). 5. The butterfly valve for exhaust duct according to claim 1, characterized in that the valve stem (3) and the butterfly plate (4) are connected by a pin. 6. A butterfly valve for exhaust duct according to claim 4, characterized in that the lever is provided with anti-slip grooves.