阅读说明：本技术 一种多阀杆蝶阀 (Multi-valve-rod butterfly valve ) 是由 徐国华 于 2021-07-01 设计创作，主要内容包括：本发明公开了一种多阀杆蝶阀,其特征在于：所述蝶板包括有外蝶板与内蝶板,外蝶板与阀座密封配合,外蝶板设有中心孔,内蝶板与外蝶板的中心孔密封配合,所述阀杆包括有外阀杆、内阀杆、下阀杆与上阀杆,下阀杆固定穿设于阀体下部,外蝶板转动设置于下阀杆上,外阀杆可转动穿设于阀体上部,且外阀杆传动外蝶板转动,内阀杆可旋转升降穿设于外阀杆上,且内阀杆下端穿入下阀杆内,相应的内阀杆与外阀杆之间设有相配合的导块与螺旋槽,且内阀杆传动内蝶板转动,上阀杆上端连接有驱动装置,驱动装置通过支架安装于阀体上端,上阀杆下端连接有控制套,控制套与内阀杆上端相连,本发明结构合理,开启方便轻松。(The invention discloses a multi-valve-rod butterfly valve which is characterized in that: the butterfly plate comprises an outer butterfly plate and an inner butterfly plate, the outer butterfly plate is in sealing fit with the valve seat, the outer butterfly plate is provided with a central hole, the inner butterfly plate is in sealing fit with the central hole of the outer butterfly plate, the valve rod comprises an outer valve rod, an inner valve rod, a lower valve rod and an upper valve rod, the lower valve rod is fixedly arranged on the lower part of the valve body in a penetrating way, the outer butterfly plate is rotationally arranged on the lower valve rod, the outer valve rod is rotationally arranged on the upper part of the valve body in a penetrating way, and the outer valve rod drives the outer butterfly plate to rotate, the inner valve rod can rotate and go up and down to penetrate through the outer valve rod, the lower end of the inner valve rod penetrates into the lower valve rod, a guide block and a spiral groove which are matched with each other are arranged between the corresponding inner valve rod and the outer valve rod, the inner valve rod drives the inner butterfly plate to rotate, the upper end of the upper valve rod is connected with the driving device, the driving device is installed at the upper end of the valve body through a support, the lower end of the upper valve rod is connected with the control sleeve, and the control sleeve is connected with the upper end of the inner valve rod.)

1. The utility model provides a many valve stems butterfly valve, is equipped with disk seat and butterfly plate, its characterized in that including valve body and valve rod in the valve body: the butterfly plate comprises an outer butterfly plate and an inner butterfly plate, the outer butterfly plate is in sealing fit with the valve seat, the outer butterfly plate is provided with a center hole, the inner butterfly plate is in sealing fit with the center hole of the outer butterfly plate, the valve rod comprises an outer valve rod, an inner valve rod, a lower valve rod and an upper valve rod, the lower valve rod is fixedly arranged on the lower portion of the valve body in a penetrating manner, the outer butterfly plate is rotatably arranged on the lower valve rod, the outer valve rod is rotatably arranged on the upper portion of the valve body in a penetrating manner, the outer valve rod drives the outer butterfly plate to rotate, the inner valve rod is rotatably arranged on the outer valve rod in a lifting manner, the lower end of the inner valve rod penetrates into the lower valve rod, a guide block and a spiral groove which are matched with each other are arranged between the corresponding inner valve rod and the outer valve rod, the inner valve rod drives the inner butterfly plate to rotate, the upper end of the upper valve rod is connected with a driving device which is arranged on the upper end of the valve body through a bracket, the lower end of the upper valve rod is connected with a control sleeve, the upper end of the control sleeve is connected with the upper end of the inner valve rod, the upper end of the outer valve rod is provided with a key groove, but be equipped with the key that lateral shifting adjusted in the control cover, the inboard lower extreme angle of this key sets up to leading the inclined plane, and the key sets up and transversely moves adjusting part and horizontal inwardly moved reset spring outward.

2. The multi-stem butterfly valve of claim 1, wherein: the horizontal outward movement adjusting part comprises a lifting rod, an upright push rod, wherein the upright push rod can be vertically moved to be arranged on the control sleeve, the lifting rod can be rotationally connected to the upper end of the upright push rod and can be driven to move upwards, a downward movement reset spring is arranged on the upright push rod, the lifting rod can be rotated by a certain angle to be matched with the upper end face of the control sleeve in a limiting manner, the lifting rod is connected to a transverse rod, the transverse rod can be transversely moved to be arranged on the control sleeve in a penetrating manner, the transverse rod is driven by the upright push rod to transversely move outwards, a driving groove is formed in the corresponding transverse rod, a driving head is arranged at the lower end of the upright push rod, and a driving inclined plane matched with transmission is arranged between the driving head and the driving groove.

3. The multi-stem butterfly valve of claim 1, wherein: and an axial blind hole for the inner valve rod to penetrate is formed in the lower valve rod, and an axial reset spring is arranged between the lower end of the inner valve rod and the bottom of the axial blind hole.

Technical Field

The invention relates to an improved butterfly valve, in particular to an improved butterfly valve with multiple valve rods.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and a part for controlling a pipeline medium is a valve which is opened and closed by rotating around a valve shaft (valve rod) by taking a closing member (a valve clack or a butterfly plate) as a disc, and has the defects that: when the butterfly valve is opened, the torque is large when the butterfly valve is opened due to the fact that the front portion and the rear portion of the butterfly valve have very large pressure difference, and the difficulty in opening is increased.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a multi-valve-rod butterfly valve which is reasonable in structure and convenient and easy to open.

In order to solve the technical problems, the invention is realized by adopting the following technical scheme: this kind of many valve stems butterfly valve, including valve body and valve rod, be equipped with disk seat and butterfly plate in the valve body, its characterized in that: the butterfly plate comprises an outer butterfly plate and an inner butterfly plate, the outer butterfly plate is in sealing fit with the valve seat, the outer butterfly plate is provided with a center hole, the inner butterfly plate is in sealing fit with the center hole of the outer butterfly plate, the valve rod comprises an outer valve rod, an inner valve rod, a lower valve rod and an upper valve rod, the lower valve rod is fixedly arranged on the lower portion of the valve body in a penetrating manner, the outer butterfly plate is rotatably arranged on the lower valve rod, the outer valve rod is rotatably arranged on the upper portion of the valve body in a penetrating manner, the outer valve rod drives the outer butterfly plate to rotate, the inner valve rod is rotatably arranged on the outer valve rod in a lifting manner, the lower end of the inner valve rod penetrates into the lower valve rod, a guide block and a spiral groove which are matched with each other are arranged between the corresponding inner valve rod and the outer valve rod, the inner valve rod drives the inner butterfly plate to rotate, the upper end of the upper valve rod is connected with a driving device which is arranged on the upper end of the valve body through a bracket, the lower end of the upper valve rod is connected with a control sleeve, the upper end of the control sleeve is connected with the upper end of the inner valve rod, the upper end of the outer valve rod is provided with a key groove, but be equipped with the key that lateral shifting adjusted in the control cover, the inboard lower extreme angle of this key sets up to leading the inclined plane, and the key sets up and transversely moves adjusting part and horizontal inwardly moved reset spring outward.

The horizontal outward movement adjusting part comprises a lifting rod, an upright push rod, wherein the upright push rod can be vertically moved to be arranged on the control sleeve, the lifting rod can be rotationally connected to the upper end of the upright push rod and can be driven to move upwards, a downward movement reset spring is arranged on the upright push rod, the lifting rod can be rotated by a certain angle to be matched with the upper end face of the control sleeve in a limiting manner, the lifting rod is connected to a transverse rod, the transverse rod can be transversely moved to be arranged on the control sleeve in a penetrating manner, the transverse rod is driven by the upright push rod to transversely move outwards, a driving groove is formed in the corresponding transverse rod, a driving head is arranged at the lower end of the upright push rod.

And an axial blind hole for the inner valve rod to penetrate is formed in the lower valve rod, and an axial reset spring is arranged between the lower end of the inner valve rod and the bottom of the axial blind hole.

The improved multi-valve-rod butterfly valve has the advantages that the outer butterfly plate and the inner butterfly plate are arranged in the valve in a double-butterfly-plate mode, the inner butterfly plate is opened easily and conveniently before the outer butterfly valve is opened, after a medium part in front of the valve enters the valve, the pressure in front of the valve and behind the valve is reduced, the butterfly valve is opened easily, the manufacturing cost is low, the number of external interfaces is small, and the butterfly valve is not easy to leak.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

The drawings show the structure of the invention, and the details thereof are further described below with reference to the drawings. In this embodiment, the multi-valve-stem butterfly valve comprises a valve body 1 and a valve stem, a valve seat 22 and a butterfly plate are arranged in the valve body 1, the left side of the butterfly plate is an inlet side 3 of the valve body 1, the right side of the butterfly plate is an outlet side 26 of the valve body 1, the butterfly plate comprises an outer butterfly plate 24 and an inner butterfly plate 25, the outer butterfly plate 24 is in sealing fit with the valve seat 22, a sealing ring 23 is arranged on the outer circle of the outer butterfly plate 24, the outer butterfly plate 24 is provided with a central hole, the inner butterfly plate 25 is in sealing fit with the central hole of the outer butterfly plate 24, the valve stem comprises an outer valve stem 5, an inner valve stem 4, a lower valve stem 2 and an upper valve stem 12, the lower valve stem 2 is fixedly arranged on the lower portion of the valve body 1, a lower end cover 28 is arranged at the lower end of the valve body 1, the outer butterfly plate 24 is rotatably arranged on the upper portion of the valve body 1, the outer valve stem 5 drives the outer butterfly plate 24 to rotate, the inner valve stem 4 is rotatably arranged on the outer valve stem 5 in a lifting way, and penetrates into the lower end of the lower valve stem 2, a guide block 7 and a spiral groove 6 which are matched with each other are arranged between the corresponding inner valve rod 4 and the corresponding outer valve rod 5, the inner valve rod 4 drives an inner butterfly plate 25 to rotate, particularly, the inner valve rod 4 and the inner butterfly plate 25 are driven in a key groove and key mode, the upper end of an upper valve rod 12 is connected with a driving device 13, particularly, the upper valve rod 12 and the driving device 13 are driven in a key groove and key mode, the driving device 13 is arranged at the upper end of the valve body 1 through a bracket 8, the driving device 13 can be selected from a worm gear device, a pneumatic device, a hydraulic device or an electric device, the lower end of the upper valve rod 12 is connected with a control sleeve 10, the control sleeve 10 is fixedly connected with the upper end of the inner valve rod 4 through a pin shaft 11, the key groove 9 is arranged on the excircle of the upper end of the outer valve rod 5, a key 19 which can transversely move and adjust is arranged in the control sleeve 10, the lower end angle of the inner side of the key 19 is set as a guide inclined plane 20, and when the key 19 moves downwards from the upper part of the outer valve rod 5, the guide inclined plane 20 touches the upper end edge of the outer valve rod 5, so that the key 19 can move outwards transversely to separate from the key groove 9 and abut against the outer circle of the outer valve rod 5, the key 19 is provided with a transverse outwards moving adjusting part and a transverse inwards moving return spring 18, the transverse inwards moving return spring 18 drives the key 19 to enter the key groove 9, and the transverse outwards moving adjusting part drives the key to separate from the key groove 9.

As a further improved specific implementation manner, the horizontal outward movement adjusting component includes a lifting rod 14 and a vertical push rod 15, the vertical push rod 15 can move up and down to penetrate through the control sleeve 10, the lifting rod 14 can be rotatably connected to the upper end of the vertical push rod 15 and can drive the vertical push rod 15 to move up, a downward movement return spring 16 is provided on the vertical push rod 15, the lifting rod 14 can rotate by a certain angle to be in limit fit with the upper end face of the control sleeve 10, the key is connected to the cross rod 17, the cross rod 17 can move transversely to penetrate through the control sleeve 10, the cross rod 17 is driven by the vertical push rod 15 to move transversely outward, a driving groove is provided on the corresponding cross rod 17, a driving head is provided at the lower end of the vertical push rod 15, and a driving inclined plane in transmission fit is provided between the driving head and the driving groove.

As a further improved specific implementation mode, the lower valve rod 2 is provided with an axial blind hole for the inner valve rod 4 to penetrate through, an axial return spring 27 is arranged between the lower end of the inner valve rod 4 and the bottom of the axial blind hole, and the inner valve rod 4 is assisted to lift.

The use method of the invention comprises the following steps:

the starting process comprises the following steps: the driving device 13 drives the upper valve rod 12 to rotate anticlockwise, drives the control sleeve 10 and the inner valve rod 4 to rotate anticlockwise, the inner butterfly plate 25 is opened, the medium part on the inlet side 3 reaches the outlet side 26, the pressure difference between the front of the valve and the rear of the valve is reduced, meanwhile, under the action of the guide block 7 and the spiral groove 6, the control sleeve 10 and the inner valve rod 4 rotate and move downwards, the key 19 is driven to rotate and move downwards along with the control sleeve 10, the key moves outwards transversely (moves towards the direction of separating from the outer valve rod 5) under the action of the guide inclined plane 20 and the upper end edge of the outer valve rod 5 until the inner end of the key 19 is tightly attached to the excircle of the outer valve rod 5, when the key 19 moves to the right front of the key slot 9, the key 19 extends into the key slot 9 under the pushing of the transversely inwards moving return spring 18, at the moment, the driving device 13 continues to drive the upper valve rod 12, the control sleeve 10 and the inner valve rod 4 to rotate anticlockwise, and simultaneously drives the outer valve rod 5 and the outer butterfly plate 24 to rotate anticlockwise, the valve is opened. At the moment, the moment for opening the butterfly valve is small, and the butterfly valve is labor-saving, easy and convenient to open.

And (3) closing process: the driving device 13 drives the upper valve rod 12 to rotate clockwise, the control sleeve 10, the inner valve rod 4, the outer valve rod 5, the outer butterfly plate 24 and the inner butterfly plate 25 are driven to rotate clockwise, the outer butterfly plate 24 is closed, at the moment, the inner valve rod 4 and the inner butterfly plate 25 do not rotate relatively relative to the outer butterfly plate 24, the inner butterfly plate 25 is still in an opening state, and when the outer butterfly plate 24 is closed, the moment of closing the butterfly valve is small, and the butterfly valve is easy and convenient to close. Then, the lifting rod 14 is rotated to make one end of the lifting rod 14 separate from the upper end face of the control sleeve 10, the vertical push rod 15 moves downwards under the action of the downward moving return spring 16, and pushes the cross rod 17 and the key 19 to move outwards transversely (move towards the direction of separating from the key slot 9), finally the key 19 separates from the key slot 9, at this time, when the driving device 13 continues to drive the upper valve rod 12 and the control sleeve 10 to rotate clockwise, the outer valve rod 5 does not rotate, the inner valve rod 4 and the inner butterfly plate 25 rotate clockwise along with the control sleeve 10, under the action of the guide block 7, the spiral groove 6 and the axial return spring 27, the inner valve rod 4 rotates clockwise and moves upwards, finally the inner butterfly plate 25 is closed, at this time, the key 19 moves above the outer valve rod 5, then the lifting rod 14 drives the vertical push rod 15 to move upwards, the lifting rod 14 is rotated to make one end of the lifting rod 14 move to the upper end face of the control sleeve 10, so as to prevent the lifting rod 14 and the vertical push rod 15 from moving downwards under the action of the downward return spring 16, at this time, the cross bar 17 and the key 19 are laterally moved inward (toward the center of the outer stem 5) by the laterally inward-moving return spring 18. In the whole process, the moment for closing the butterfly valve is small, and the butterfly valve is labor-saving, easy and convenient to close.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.