阅读说明：本技术 一种金属密封双板液动调节蝶阀 (Metal sealing double-plate hydraulic adjusting butterfly valve ) 是由 郑益丰 杨明明 陈长奔 閤享平 王若晖 张淮 于 2019-10-26 设计创作，主要内容包括：本发明提出了一种金属密封双板液动调节蝶阀,包括阀体,所述阀体呈环形,所述阀体横截断面上、其中线两侧设有两根彼此对称设置的阀杆,所述阀杆上设有碟板,所述碟板呈“D”字形,所述阀体内圆柱壁上设有阀座,两碟板在阀杆转动控制碟板与阀座接触封闭时、两碟板朝向阀体横截断面中线方向的一侧彼此接触密封；所述阀体上设有液动执行器,所述阀杆与阀体铰接,所述阀杆其中一端穿过阀体其端部设有摆杆,所述液动执行器的推杆与摆杆铰接用于推动摆杆摆动从而控制阀杆转动。本发明具有密封性好,承压能力大,开关省力迅速,且能方便调节开启流量并减少冲蚀的优点。(The invention provides a metal sealing double-plate hydraulic regulating butterfly valve which comprises a valve body, wherein the valve body is annular, two valve rods which are symmetrically arranged are arranged on the cross section of the valve body and on two sides of the central line of the valve body, discs are arranged on the valve rods, the discs are D-shaped, a valve seat is arranged on the inner cylindrical wall of the valve body, and when the valve rods rotate to control the discs to be in contact with the valve seat for sealing, one sides of the two discs, facing the central line direction of the cross section of the valve body, are in contact sealing with each other; the valve body is provided with a hydraulic actuator, the valve rod is hinged with the valve body, one end of the valve rod penetrates through the end part of the valve body and is provided with a swing rod, and a push rod of the hydraulic actuator is hinged with the swing rod and is used for pushing the swing rod to swing so as to control the valve rod to rotate. The invention has the advantages of good sealing performance, large bearing capacity, labor saving and quick opening and closing, convenient adjustment of opening flow and reduction of erosion.)

1. The utility model provides a metal seal double plate hydraulic control butterfly valve, includes the valve body, the valve body is the annular, its characterized in that: two valve rods which are symmetrically arranged are arranged on the two sides of the central line of the cross section of the valve body, a disc plate is arranged on each valve rod and is in a D shape, a valve seat is arranged on the inner cylindrical wall of the valve body, and when the valve rods rotate to control the disc plates to be in contact with the valve seat for sealing, one sides of the two disc plates facing to the central line direction of the cross section of the valve body are in contact with each other for sealing; the valve body is provided with a hydraulic actuator, the valve rod is hinged with the valve body, one end of the valve rod penetrates through the end part of the valve body and is provided with a swing rod, and a push rod of the hydraulic actuator is hinged with the swing rod and is used for pushing the swing rod to swing so as to control the valve rod to rotate.

2. The metal sealing double-plate hydraulic adjusting butterfly valve according to claim 1, characterized in that: the rotation directions of the two valve rods are the same.

3. The metal sealing double-plate hydraulic adjusting butterfly valve according to claim 1, characterized in that: the hydraulic actuators are two and can respectively and independently control one of the discs to open or close.

4. The metal sealing double-plate hydraulic adjusting butterfly valve according to claim 1, characterized in that: the valve rod has a rotation range of 90 degrees.

5. The metal sealing double-plate hydraulic adjusting butterfly valve according to claim 1, characterized in that: the section of the disc plate towards the cross section direction of the valve rod is spindle-shaped.

6. The metal sealing double-plate hydraulic adjusting butterfly valve according to claim 1, characterized in that: the outer edge of the disc plate is provided with a circle of metal sealing edge which is arranged around the D-shaped outline of the disc plate and is in contact sealing with the valve seat or another disc plate, and one surface of the metal sealing edge facing the closing direction of the disc plate is provided with a reinforcing edge of which the outer outline is smaller than the outline of the outer edge of the metal sealing edge.

7. The metal-sealed double-plate hydraulically-regulated butterfly valve according to claim 6, wherein: the metal sealing edge and the reinforcing edge are welded and fixed with the disc plate.

8. The metal-sealed double-plate hydraulically-regulated butterfly valve according to claim 6, wherein: and one surface of the valve seat, which is contacted with the metal sealing edge, is provided with a positioning groove for accommodating the metal sealing edge.

9. The metal sealing double-plate hydraulic adjusting butterfly valve according to claim 1, characterized in that: the valve rod is equipped with the one end of pendulum rod and still is equipped with the dish board opening angle pointer, be equipped with the calibrated scale that is used for instructing the dish board opening angle on the valve body.

10. The metal sealing double-plate hydraulic adjusting butterfly valve according to claim 1, characterized in that: the swing rods on the two valve rods are positioned at the different ends of the two valve rods.

Technical Field

The invention relates to the field of valves, in particular to a metal sealing double-plate hydraulic adjusting 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 main functions of cutting off and intercepting are realized on the pipeline. 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 butterfly valve is a valve which uses a disc type opening and closing piece to rotate back and forth by about 90 degrees to open, close or adjust the medium flow. The butterfly valve has the advantages of simple structure, small volume, light weight, less material consumption, small installation size, small driving moment, simple and convenient operation and rapidness, and simultaneously has good flow regulation function and sealing closing characteristic, thereby being one of the fastest valve varieties developed in the last ten years. Butterfly valves are widely used. The variety and number of uses thereof are still continuously expanding and are developing toward high temperature, high pressure, large caliber, high sealing property, long life, excellent regulation property, and one-valve multi-function. The reliability and other performance indexes of the composite material reach higher levels. With the application of the synthetic rubber for preventing chemical corrosion to the butterfly valve, the performance of the butterfly valve is improved. The synthetic rubber has the characteristics of corrosion resistance, erosion resistance, stable size, good rebound resilience, easiness in forming, low cost and the like, and synthetic rubbers with different properties can be selected according to different use requirements so as to meet the use working condition of the butterfly valve.

The butterfly valve is characterized in that: 1. the butterfly valve has the characteristics of simple structure, small volume, light weight, material consumption saving, small installation size, quick opening and closing, 90-degree reciprocating rotation, small driving moment and the like, is used for cutting off, connecting and adjusting media in pipelines, and has good fluid control property and closing sealing property. 2. The butterfly valve can convey slurry, and liquid accumulation at the opening of the pipeline is minimum. At low pressures, good sealing can be achieved. The adjusting performance is good. 3. The streamlined design of the butterfly plate ensures that the fluid resistance loss is small, so that the butterfly plate is an energy-saving product. 4. The valve rod is of a through rod structure, and has good comprehensive mechanical property, corrosion resistance and scratch resistance after thermal refining. When the butterfly valve is opened and closed, the valve rod only rotates but does not lift, the packing of the valve rod is not easy to damage, and the sealing is reliable. And the butterfly valve is fixed with the butterfly plate taper pin, and the extending end is designed to prevent the valve rod from being broken out when the joint of the valve rod and the butterfly plate is accidentally broken. 5. The connection modes comprise flange connection, butt clamp connection, butt welding connection and lug butt clamp connection. The driving form is manual, worm gear transmission, electric, pneumatic, hydraulic, electrohydraulic linkage and other executing mechanisms, and long-distance control and automatic operation can be realized.

The advantages are that: 1. the valve is convenient and rapid to open and close, labor-saving, small in fluid resistance, and capable of being operated frequently, and the valve is simple in structure, small in overall dimension, short in structural length, small in size, light in weight, and applicable to valves with large calibers, 3, slurry can be conveyed, the amount of liquid accumulated at a pipeline opening is minimum, 4, good sealing can be achieved under low pressure, 5, good in adjusting performance, 6, the effective flow area of a valve seat channel is large when the valve seat channel is fully opened, the fluid resistance is small, 7, the opening and closing torque is small, the butterfly plates on two sides of a rotating shaft are basically equal to each other under the action of media, and the directions of generated torques are opposite, so that labor is saved, 8, sealing surface materials generally adopt rubber and plastic, so that the low-pressure sealing performance is good, 9, the installation is convenient.

The disadvantages are as follows: 1. the range of the use pressure and the working temperature is small, and 2, the sealing performance is poor.

Therefore, for a large-diameter butterfly valve, if high pressure is required, the thickness of the disc plate must be increased to make up for the deficiency in strength, so that the thickness of the disc plate is increased, the flow area of the butterfly valve is affected, the radial size of the butterfly valve is increased, the force during opening is also increased, and the production cost and the service life of the butterfly valve are affected.

Disclosure of Invention

Based on the problems, the invention aims to provide the metal sealing double-plate hydraulic regulating butterfly valve which has the advantages of good sealing performance, high pressure-bearing capacity, labor-saving and quick opening and closing, and can conveniently regulate the opening flow and reduce the erosion.

Aiming at the problems, the following technical scheme is provided: a metal sealing double-plate hydraulic regulating butterfly valve comprises a valve body, wherein the valve body is annular, two valve rods which are symmetrically arranged are arranged on the cross section of the valve body and on two sides of the central line of the cross section of the valve body, discs are arranged on the valve rods and are D-shaped, a valve seat is arranged on the inner cylindrical wall of the valve body, and when the valve rods rotate to control the discs to be in contact with the valve seat for sealing, one sides of the two discs, facing the direction of the central line of the cross section of the valve body, are in contact with each other for sealing; the valve body is provided with a hydraulic actuator, the valve rod is hinged with the valve body, one end of the valve rod penetrates through the end part of the valve body and is provided with a swing rod, and a push rod of the hydraulic actuator is hinged with the swing rod and is used for pushing the swing rod to swing so as to control the valve rod to rotate.

In the structure, through setting up two valve rods, control two dish boards respectively, it is sealed to make two dish boards can cut off the river jointly, because be two with the dish board setting, control the left and right sides cross section of valve body inner chamber respectively, consequently, the pressurized area of single dish board reduces half, the pressure that bears also reduces half thereupon, can effectively reduce the whole thickness of dish board, and improve the bearing pressure of valve, thereby satisfy the flow requirement, simultaneously because the dish board size reduces, the arm of force that receives also reduces thereupon on the valve rod when opening and closing, can provide higher sealed dynamics when closing for the dish board under the equal moment of torsion, because the dish board is two common control break-make, consequently, can make the flow of more accurate control of butterfly valve.

The invention is further arranged such that the direction of rotation of the two valve stems is the same.

In the structure, when the disc plates are closed, the disc plates can be close to each other and contact and seal at the position of the middle line on the cross section of the valve body.

The invention is further provided that the number of the hydraulic actuators is two, and one of the two hydraulic actuators can be respectively and independently controlled to be opened or closed.

In the structure, the hydraulic actuators are hydraulic cylinders, and the opening or closing of the two hydraulic actuators or the opening or closing of one of the two hydraulic actuators can be controlled simultaneously through the reversing valve, so that fine flow regulation is realized.

The invention is further arranged that the valve stem has a range of rotation of 90 degrees.

The invention is further arranged that the section of the disc plate towards the cross section direction of the valve rod is in a spindle shape.

In the structure, the resistance of the medium flowing through can be reduced as much as possible, and the strength and the rigidity of the disc plate are improved.

The invention is further arranged that the outer edge of the disc plate is provided with a circle of metal sealing edge which is arranged around the D-shaped outline of the disc plate and is in contact sealing with the valve seat or another disc plate, and one surface of the metal sealing edge facing the closing direction of the disc plate is provided with a reinforcing edge with the outline smaller than that of the outer edge of the metal sealing edge.

In the structure, the sections of the metal sealing edge and the reinforcing edge are in a step shape when the metal sealing edge and the reinforcing edge are combined into a whole, so that the sealing effect can be ensured when the metal sealing edge and the reinforcing edge are in contact sealing with the valve seat, and the positioning effect and the strength and rigidity of the metal sealing edge can be improved.

The invention is further arranged that the metal sealing edge and the reinforcing edge are welded and fixed with the disc plate.

In the structure, the welding fixation has the advantages of firm fixation and good sealing property.

The invention is further provided that one surface of the valve seat, which is contacted with the metal sealing edge, is provided with a positioning groove for accommodating the metal sealing edge.

In the structure, the positioning groove is matched with the metal sealing edge, so that the sealing performance can be improved.

The invention is further arranged in that one end of the valve rod, which is provided with the swing rod, is also provided with a disc plate opening angle pointer, and the valve body is provided with a dial for indicating the opening angle of the disc plate.

In the structure, an operator can visually see the opening angle of the current disc plate from the outside.

The invention is further arranged such that the rocker levers on both valve stems are located at different ends of both valve stems.

In the structure, the overall structure layout is more reasonable, and the mutual interference of the two swing rods caused by the swing of the swing rods when the two swing rods are arranged at the same end of the valve rod is avoided.

The invention has the beneficial effects that: through setting up two valve rods, control two dishes respectively, make two dishes can cut off sealedly jointly, because be two with the dish setting, control the left and right sides cross section of valve body inner chamber respectively, consequently, the pressurized area of single dish reduces half, the pressure that bears also reduces half thereupon, can effectively reduce the whole thickness of dish, and improve the bearing pressure of valve, thereby satisfy the flow requirement, simultaneously because the dish size reduces, the arm of force that receives also reduces thereupon on opening the valve rod when closing, can provide higher sealed dynamics when closing for the dish under the equal moment of torsion, because the dish is two common control break-make, consequently, can make the flow of more accurate control of butterfly valve.

Drawings

Fig. 1 is a schematic structural diagram of the closed state of the present invention.

Fig. 2 is a structural diagram of the open state of the present invention.

FIG. 3 is a schematic top view of a half-section structure of the present invention.

FIG. 4 is a schematic view of the structure of the dish plate of the present invention.

FIG. 5 is an enlarged view of the portion A of FIG. 2 according to the present invention.

FIG. 6 is an enlarged view of the portion B of FIG. 3 according to the present invention.

FIG. 7 is an enlarged view of the portion C of FIG. 3 according to the present invention.

The reference numbers in the figures mean: 10-a valve body; 11-a valve stem; 111-a swing link; 112-disc plate opening angle pointer; 12-a dish plate; 121-metal sealing lips; 122-a reinforcing rim; 13-a valve seat; 131-a positioning groove; 14-a hydraulic actuator; 141-a push rod; 15-dial.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 to 7, a metal sealing double-plate hydraulic regulating butterfly valve shown in fig. 1 to 7 comprises a valve body 10, wherein the valve body 10 is annular, two valve rods 11 symmetrically arranged with each other are arranged on two sides of the central line of the cross section of the valve body 10, a disc plate 12 is arranged on each valve rod 11, the disc plate 12 is D-shaped, a valve seat 13 is arranged on the inner cylindrical wall of the valve body 10, and when the valve rods 11 rotate to control the disc plate 12 to contact with the valve seat 13 and close, one side of each disc plate 12 facing the central line direction of the cross section of the valve body 10 is in contact sealing with each other; the hydraulic actuator 14 is arranged on the valve body 10, two ends of the valve rod 11 are hinged to the valve body 10, one end of the valve rod 11 penetrates through the end portion of the valve body 10 and is provided with a swing rod 111, and a push rod 141 of the hydraulic actuator 14 is hinged to the swing rod 111 and used for pushing the swing rod 111 to swing so as to control the valve rod 11 to rotate.

In the structure, through setting up two valve rods 11, control two dish boards 12 respectively, make two dish boards 12 can cut off sealedly jointly, because be two with dish board 12 setting, the left and right sides cross section of 10 inner chambers of control valve body respectively, consequently, the pressurized area of single dish board 12 reduces half, the pressure that bears also reduces half thereupon, can effectively reduce the whole thickness of dish board 12, and improve the bearing pressure of valve, thereby satisfy the flow requirement, simultaneously because dish board 12 size reduces, the arm of force that receives also reduces thereupon on valve rod 11 when opening and closing, can provide higher sealing force when closing for dish board 12 under the equal moment of torsion, because dish board 12 is two common control break-make, consequently, the flow of the more accurate control of butterfly valve can be made.

In this embodiment, the two valve rods 11 rotate in the same direction.

In the above structure, the disks 12 can be closely contacted and sealed at the position of the middle line of the cross section of the valve body 10 when the disks 12 are closed.

In this embodiment, there are two hydraulic actuators 14, which can respectively control one of the discs 12 to open or close independently.

In the above structure, the hydraulic actuators 14 are hydraulic cylinders, and the opening or closing of the two hydraulic actuators 14 or the opening or closing of one of the two hydraulic actuators 14 can be controlled simultaneously by the reversing valve, so as to realize fine flow rate adjustment.

In this embodiment, the valve rod 11 rotates 90 degrees.

In this embodiment, the cross section of the disc 12 in the cross section direction of the valve stem 11 is spindle-shaped.

In the above structure, the resistance to the medium flow can be reduced as much as possible, and the strength and rigidity of the disk plate 12 can be improved.

In this embodiment, the outer edge of the disk 12 is provided with a ring of metal sealing edge 121 which is arranged around the D-shaped contour of the disk 12 and is in contact with the valve seat 13 or another disk 12 for sealing, and one surface of the metal sealing edge 121 facing the closing direction of the disk 12 is provided with a reinforcing edge 122 with an outer contour smaller than that of the outer edge of the metal sealing edge 121.

In the above structure, when the metal sealing edge 121 and the reinforcing edge 122 are combined into a whole, the sections of the two are stepped, so that the sealing effect can be ensured when the two are in contact sealing with the valve seat 13, and the positioning effect and the strength and rigidity of the metal sealing edge 121 can be improved.

In this embodiment, the metal sealing rim 121 and the reinforcing rim 122 are welded and fixed to the plate 12.

In the structure, the welding fixation has the advantages of firm fixation and good sealing property.

In this embodiment, a positioning groove 131 for accommodating the metal sealing edge 121 is formed on a surface of the valve seat 13 contacting the metal sealing edge 121.

In the above structure, the positioning groove 131 is adapted to the metal sealing edge 121, so that the sealing performance can be improved.

In this embodiment, a disc plate opening angle pointer 112 is further disposed at one end of the valve rod 11, where the swing rod 111 is disposed, and a dial 15 for indicating the disc plate opening angle is disposed on the valve body 10.

In the above structure, the operator can visually see the opening angle of the current dish plate 12 from the outside.

In this embodiment, the swing rods 111 of the two valve rods 11 are located at different ends of the two valve rods 11.

In the structure, the overall structure layout is more reasonable, and the mutual interference of the two swing rods 111 caused by the swing of the swing rods 111 when the two swing rods 111 are arranged at the same end of the valve rod 11 is avoided.

The invention has the beneficial effects that: through setting up two valve rods 11, control two dish boards 12 respectively, make two dish boards 12 can cut off the flow jointly and seal, because be two with dish board 12 setting, the left and right sides cross section of 10 inner chambers of control valve body respectively, consequently, the pressurized area of single dish board 12 reduces half, the pressure that bears also reduces half thereupon, can effectively reduce the whole thickness of dish board 12, and improve the bearing pressure of valve, thereby satisfy the flow requirement, simultaneously because dish board 12 size reduces, the arm of force that receives also reduces thereupon on valve rod 11 when opening and closing, can provide higher sealed dynamics when closing for dish board 12 under the equal moment of torsion, because dish board 12 is two common control break-make, consequently, can make the flow of the more accurate control of butterfly valve.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed in the above are also considered to be within the protective scope of the present invention.