Novel shearing valve
Technical Field
The utility model relates to the field of valves, in particular to a novel shear valve.
Background
The shear valve belongs to a gate valve and is generally used in a pipeline system under severe working conditions. The existing shear valve generally comprises a valve body, wherein the valve body is provided with a valve cavity, a flashboard is arranged in the valve cavity, movable valve seats are arranged on two sides of the flashboard, a protective cover is connected to the valve body inside the valve cavity and located outside the movable valve seats, and the protective cover is used for ensuring the sealing fit between the movable valve seats on two sides and the flashboard. But the setting of protection casing has not only increased the complexity of valve inner structure, has also increased the cost, and the protection casing occupies certain space moreover, will increase the volume of whole valve certainly, uses inconveniently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel shearing valve to solve the problems of high valve cost, complex internal structure and larger whole valve volume in the prior art.
In order to achieve the purpose, the novel shear valve adopts the following technical scheme: the utility model provides a novel shear valve, includes the valve body, and the valve body has the valve pocket, and the inside flashboard that is provided with of valve pocket all is provided with movable disk seat in the both sides of flashboard in the valve pocket, be provided with the elasticity tight structure in top that is used for pushing up tight both sides movable disk seat on the inner wall of valve pocket respectively to guarantee the sealed effect between both sides movable disk seat and the flashboard.
The elastic jacking structure comprises a first spring seat arranged on the inner wall of the valve cavity, a first spring is arranged in the spring seat, and the end part of the first spring is jacked on the outer side surface of the movable valve seat.
The elastic jacking structures are multiple and are respectively positioned on two sides of the flashboard and correspond to the movable valve seats.
The number of the elastic jacking structures on the same side of the flashboard on the inner wall of the valve cavity is at least two and is arranged at intervals along the vertical direction.
The movable valve seat comprises a cylindrical part and a flat plate part extending along one side or two sides of the moving direction of the flashboard, and the elastic jacking structure is used for jacking the flat plate part of the movable valve seat.
And a valve seat connecting structure is arranged between the flat plate parts of the two movable valve seats.
The valve seat connecting structure comprises a supporting column positioned between two movable valve seats, and two end surfaces of the supporting column are used for being in contact with and press fit with the corresponding movable valve seats; and each movable valve seat is provided with a connecting bolt in a penetrating way, and the connecting bolt is connected with the supporting column.
And a second spring seat is arranged on the outer side surface of each movable valve seat, a second spring is arranged in each second spring seat, the connecting bolt penetrates through the second spring, and the head of the connecting bolt is in press fit with the second spring.
The second spring adopts the dish spring group, and dish spring group is including a plurality of dish reeds that stack in proper order.
The utility model has the beneficial effects that: the inner wall of the valve cavity is provided with the elastic jacking structure to directly and elastically jack up the movable valve seats on two sides, so that the sealing effect between the gate plate and the movable valve seats on two sides is ensured, a protective cover in the existing shearing valve is omitted, the structure of the valve is simplified, the cost is saved, the whole volume of the valve is reduced, the valve is flexible and convenient, and the sealing effect between the gate plate and the movable valve seats on two sides is also ensured.
Drawings
FIG. 1 is a schematic structural view of a first embodiment of a novel shear valve of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic structural view of the valve seat connecting structure of FIG. 1;
FIG. 4 is a schematic structural view of a second embodiment of a novel shear valve of the present invention;
fig. 5 is a schematic structural view of a third embodiment of the novel shear valve of the present invention.
Detailed Description
The first embodiment of the novel shear valve disclosed by the utility model is shown in fig. 1-3 and comprises a valve body 1, wherein the valve body is provided with a valve cavity 2, a gate plate 3 is arranged in the valve cavity, and movable valve seats 4 are arranged on two sides of the gate plate in the valve cavity. The inner wall of the valve cavity is provided with elastic jacking structures 17 for respectively jacking the movable valve seats on the two sides so as to ensure the sealing effect between the movable valve seats on the two sides and the flashboard. The elastic jacking structure comprises a first spring seat 10 arranged on the inner wall of the valve cavity, a first spring 11 is arranged in the spring seat, and the end part of the first spring is jacked on the outer side surface of the movable valve seat. The elastic jacking structures are multiple and are respectively positioned on two sides of the flashboard and correspond to the movable valve seats. In order to have better jacking effect, the number of the elastic jacking structures on the same side of the gate plate on the inner wall of the valve cavity is at least two, and the elastic jacking structures are arranged at intervals in the vertical direction.
The movable valve seat includes a cylindrical portion 5 and a flat plate portion 6 extending along one side of the shutter plate moving direction, and an elastic urging structure for urging the flat plate portion of the movable valve seat. The plate portion in this embodiment extends downward, and the up and down directions are defined according to the directions of the drawings, and do not represent the actual installation direction of the shear valve, but merely to clearly express the structure of the movable valve seat. The cylindrical portion and the flat plate portion of each movable valve seat are integrally formed, and may be screwed or welded together. The cavity of the cylindrical portion 5 forms a valve seat flow passage hole 8 for allowing a medium to flow therethrough in correspondence with the valve body flow passage hole 7 on the valve body. The flashboard 3 is provided with a flashboard flow passage hole 9 which correspondingly forms a medium flow passage hole of the valve.
A valve seat connecting structure 16 is provided between the flat portions of the two movable valve seats. The valve seat connecting structure is arranged at the lower part of the flat plate part. The valve seat connecting structure includes a support column 12 located between two movable valve seats, both end surfaces of the support column being adapted for contact-press fitting with the respective movable valve seats. And each movable valve seat is provided with a connecting bolt 13 in a penetrating way, and the connecting bolts are connected with the supporting columns. And a second spring seat 14 is arranged on the outer side surface of each movable valve seat, a second spring 15 is arranged in each second spring seat, the connecting bolt penetrates through the second spring, and the head of the connecting bolt is in press fit with the second spring. The second spring adopts the dish spring group, and dish spring group is including a plurality of dish reeds that stack in proper order.
As shown in fig. 4, the second embodiment of the novel shear valve of the present invention is different from the first embodiment only in that the extending direction of the flat plate portion 6 of the movable valve seat 4 is different, in this embodiment, the flat plate portion 6 of the movable valve seat extends upward, the valve seat connecting structure 16 is disposed on the upper portion of the flat plate portion, and the elastic abutting structure 17 is disposed at the upper end of the valve cavity and corresponds to the flat plate portion.
As shown in fig. 5, the third embodiment of the novel shear valve of the present invention is different from the first embodiment only in that the extending direction of the flat plate portion of the movable valve seat is different, in this embodiment, the flat plate portion 6 extends along both sides of the moving direction of the shutter, and in this embodiment, the flat plate portion extends in both the upper and lower directions. The valve seat connecting structures 16 are correspondingly arranged at the upper part and the lower part of the flat plate part, and the elastic jacking structures 17 are arranged at the upper end and the lower end of the valve cavity and correspond to the upper flat plate part and the lower flat plate part.
In other embodiments of the present invention, the second spring may not adopt a disc spring set, but adopt a common compression spring; the number of the elastic jacking structures can be adjusted according to actual needs; the position of the elastic jacking structure can be adjusted according to actual needs; the end of the first spring may also be provided with a top press block.