A clamping valve

Abstract

The present invention relates to the field of valves, and in particular to a splint valve, which mainly solves the problem of low service life of splint valves in the prior art. The valve body comprises a flow channel for fluid flow, the valve stem is arranged on the valve body, and a sealing connection is achieved through the valve cover, the lower end of the valve stem is connected to the valve plate, both sides of the valve plate on the valve body are concave to form a chamber, a floating disk is arranged in each chamber, a limit block for limiting the movement angle of the floating disk is arranged on the valve body, a sealing member and an elastic member are arranged between the valve body and the floating disk, a support plate is arranged in the middle of a makeshift groove, and the support plate divides the makeshift groove into two positioning grooves, the valve plate comprises a connecting portion connected to the valve stem, two baffles are arranged on the connecting portion in parallel and at intervals, when the valve plate convection channel is intercepted, the support plate is inserted into the interval between the two baffles, and the two floating disks are in surface contact with the outer sides of the two baffles respectively.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to a clamping valve. Background Art

[0002] The clamp valve is a special valve used for plugging operations on pipelines. It is installed on the plugging tee on the pressure pipeline and is used to carry out pressure tapping with a tapping machine. The plugging equipment is used to plug the pressure pipeline to complete pipeline repairs and construction operations. It can also be used to block or dredge the medium flow in a certain pipe section during the cleaning operation.

[0003] Chinese patent application No.: 201611173619.8 discloses a manual clamping plate valve, including a central clamping plate body and side clamping plate bodies symmetrically arranged on both sides of the central clamping plate body, the central clamping plate body is a hollow structure, the central clamping plate body and the side clamping plate body are provided with a fluid channel for fluid to pass through on one side of the face, the central clamping plate body is provided with a movable plate capable of opening or closing the fluid channel, and the movable plate is moved by a manual driving mechanism arranged on one side of the central clamping plate body. It discloses the structure of the existing clamping plate valve in detail.

[0004] Most existing valves use a wire sealing structure. Under the action of fluid, the sealing part is easily damaged, causing leakage and affecting the service life of the valve. Summary of the invention

[0005] Therefore, in view of the above problems, the present invention provides a clamping plate valve, which mainly solves the problem of low service life of the clamping plate valve in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a clamping valve, comprising a valve body, a valve cover, a valve stem, a valve plate and a driving device, the valve body having a flow channel for fluid flow, the valve stem passing through the valve body and realizing a sealing connection through the valve cover, the lower end of the valve stem being connected to the valve plate, and the upper end of the valve stem being connected to the driving device, the driving device driving the valve stem to rotate so as to drive the valve plate to realize the diversion and cutoff of the convection channel, the two sides of the valve plate on the valve body are concave to form a chamber, each of the chambers is provided with a floating disk, the valve body is provided with a limit block for limiting the movement angle of the floating disk, and a sealing member is provided between the valve body and the floating disk. and an elastic member, a first through hole is arranged on the floating disk which is connected with the flow channel, a recess is arranged on the lower part of the valve body corresponding to the valve plate at a position where a give way groove is arranged, a support plate is arranged in the middle part of the give way groove, and the support plate divides the give way groove into two positioning grooves, a second through hole is arranged on the support plate which is connected with the first through hole, the valve plate includes a connecting part which is connected with the valve stem, two baffles are arranged on the connecting part in parallel and at intervals, the hardness of the connecting part is less than the hardness of the baffles, when the valve plate intercepts the flow channel, the support plate is inserted into the interval between the two baffles, and the lower parts of the two baffles are embedded in the two positioning grooves, and the two floating disks are in surface contact with the outer side surfaces of the two baffles respectively.

[0007] Furthermore, a support portion is provided on the valve body, which is located in the chamber and extends coaxially with the flow channel in the direction of the floating disk. The positioning blocks are evenly distributed and arranged on the outer end of the support portion. An extension portion that abuts against the support portion is provided on the back side of the floating disk. A guide groove is provided on the extension portion at a position corresponding to the positioning block and along the flow direction of the flow channel. The positioning block is embedded in the guide groove. The elastic member is provided between the outer end of the support portion and the floating disk. A sealing groove is provided around the outer surface of the support portion, and the sealing member is embedded in the sealing groove.

[0008] Furthermore, the valve cover is sealingly connected to the valve stem by setting a stuffing gland, and the stuffing gland, the valve stem and the valve cover form a first stuffing chamber, and the first stuffing chamber is filled with a stuffing box. The stuffing gland is lockingly connected to the valve cover by bolts, and the movement direction of the bolts is the same as the axial direction of the valve stem.

[0009] Furthermore, the upper end of the packing gland is threadedly connected with a gland nut, and the gland nut, packing gland and valve stem form a second packing cavity, and the second packing cavity is filled with a stuffing box, and the movement direction of the gland nut is the same as the axial direction of the valve stem.

[0010] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: in the present clamping valve, when the driving device drives the valve stem to rotate and thus drives the valve plate to realize the interception of the convection channel, the support plate is inserted into the gap between the two baffles on the valve plate, which plays a supporting role for the valve plate, so that the strength of the connecting part and the baffle on the valve plate can be appropriately reduced, thereby reducing the processing cost, and when the hardness of the connecting part is reduced, in a fluid environment with a relatively high pressure, the valve plate forms a certain deformation, and when it moves downward, the floating plate can swing at a certain angle under the action of the elastic member and the sealing member, so that the floating plate always rests on the baffle, which can remove the hard particles on the surface during the descending process of the baffle to achieve better contact, and form a good surface contact between the floating plate and the baffle, thereby increasing the sealing performance, and when the valve plate moves upward or downward to realize the diversion or interception of the convection channel, the sealing effect with the valve plate is realized by the swing angle of the floating plate, and the swing of the floating plate is realized by the elastic member and the sealing member, and the floating plate is in the swing process. The compression stroke of the compression elastic member and the sliding friction stroke of the extension part and the sealing member are greatly reduced compared with the friction between the sealing ring and the valve plate used to achieve sealing arranged between the valve body and the valve plate in the past, thereby increasing the service life of the elastic member and the sealing member, and the friction movement between the valve plate and the floating disk during the movement of the valve plate, because the wear resistance and hardness of both are greatly improved compared with the elastic member and the sealing member, so the service life of the clamping valve is also qualitatively improved when the sealing performance is improved; further, by filling a stuffing box in a first stuffing cavity formed by a stuffing gland, a valve stem and a valve cover, when the bolt locks the stuffing gland downward, the stuffing box in the first stuffing cavity is squeezed, so that the sealing performance of the valve cover and the valve stem is increased, and then a stuffing box is filled in a second stuffing cavity formed by a gland nut, a stuffing gland and a valve stem, and the gland nut is rotated to squeeze the stuffing box in the second stuffing cavity, so that the sealing performance of the valve stem and the stuffing gland is increased, and double sealing is achieved through the valve stem stuffing, the sealing effect is good, and the service life of the valve is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0012] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0013] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0014] The embodiments of the present invention are:

[0015] refer to Figure 1 and Figure 2A clamping valve comprises a valve body 1, a valve cover 2, a valve stem 3, a valve plate 4 and a driving device, wherein the driving device comprises a housing 5, a worm gear mechanism 6 arranged in the housing 5, a hand wheel 7 arranged at the input end of the worm gear mechanism 6, and a rotating shaft 8 arranged at the output end of the worm gear mechanism 6. The valve body 1 has a flow channel 9 for fluid flow, the valve stem 3 is penetrated on the valve body 1, and is sealed by the valve cover 2. The lower end of the valve stem 3 is connected to the valve plate 4, and the upper end thereof is connected to the rotating shaft 8. The driving device drives the valve stem 3 to rotate, thereby driving the valve plate 4 to realize In order to guide and cut off the flow channel 9, the valve body 1 is located on both sides of the valve plate 4 and is concave to form a chamber 10. A floating disc 11 is arranged in each of the chambers 10. A support portion 12 is arranged on the valve body 1 and is located in the chamber 10 and is coaxial with the flow channel 9 and extends in the direction of the floating disc 11. Three positioning blocks 13 are evenly distributed around the outer end of the support portion 12. An extension portion 14 is arranged on the back of the floating disc 11 to abut against the support portion 12. A guide portion 14 is provided on the extension portion 14 at a position corresponding to the positioning block 13 and along the flow direction of the flow channel 9. The guide groove 15 is provided with a positioning block 13 embedded in the guide groove 15. A sealing member 18 and an elastic member 16 are provided between the valve body 1 and the floating plate 11. The elastic member 16 is provided between the outer end of the support portion 12 and the floating plate 11. A sealing groove 17 is provided around the outer surface of the support portion 12. The sealing member 18 is embedded in the sealing groove 17. A first through hole 19 is provided on the floating plate 11 in communication with the flow channel 9. A recessed groove is provided at the lower part of the valve body 1 corresponding to the valve plate 4. A support plate 21 is provided in the middle of the recessed groove. The give way groove is divided into two positioning grooves 20, the support plate 21 is provided with a second through hole 22 connected to the first through hole 19, the valve plate 4 includes a connecting portion 41 connected to the valve stem 3, and two baffles 42 are arranged on the connecting portion 41 in parallel and at intervals, and the hardness of the connecting portion 41 is less than that of the baffles 42. When the valve plate 4 intercepts the convection channel 9, the space between the two baffles 42 allows the support plate 21 to be inserted, and the lower parts of the two baffles 42 are embedded in the two positioning grooves 20, and the two floating plates 11 are in surface contact with the outer sides of the two baffles 42 respectively.

[0016] In this embodiment, the valve cover 2 and the valve stem 3 are sealed and connected by setting a stuffing gland 30. The stuffing gland 30, the valve stem 3 and the valve cover 2 form a first stuffing chamber 31. The first stuffing chamber 31 is filled with a stuffing box 32. The stuffing gland 30 is locked and connected to the valve cover 2 by bolts 33. The movement direction of the bolts 33 is the same as the axial direction of the valve stem 3. The upper end of the stuffing gland 30 is threadedly connected with a gland nut 34. The gland nut 34, the stuffing gland 30 and the valve stem 3 form a second stuffing chamber 35. The second stuffing chamber 35 is filled with a stuffing box 36. The movement direction of the gland nut 34 is the same as the axial direction of the valve stem 3.

[0017] The working mode of the present invention is as follows: in the present clamp valve, when the driving device drives the valve stem 3 to rotate and thus drives the valve plate 4 to realize the interception process of the convection channel 9, the space between the two baffles 42 on the valve plate 4 is provided for the support plate 21 to be inserted, which plays a supporting role for the valve plate 4, so that the strength of the connecting portion 41 and the baffle 42 on the valve plate 4 can be appropriately reduced, thereby reducing the processing cost, and when the hardness of the connecting portion 41 is reduced, in a fluid environment with a relatively large pressure, the valve plate 4 forms a certain deformation, and when it moves downward, the floating member 16 and the sealing member 18 are used to make the floating member 16 and the sealing member 18 move downward. The moving plate 11 can swing at a certain angle, so that the floating plate 11 always rests against the baffle 42, which can remove hard particles on the surface of the baffle 42 during the descending process of the baffle 42 to achieve better contact, and form a good surface contact between the floating plate 11 and the baffle 42 to increase the sealing performance. When the valve plate 4 moves up or down to guide or intercept the convection channel 9, the sealing effect with the valve plate 4 is achieved through the swing angle of the floating plate 11, and the swing of the floating plate 11 is achieved by the elastic member 16 and the sealing member 18. The floating plate 11 compresses the elastic member during the swinging process. The compression stroke of the elastic member 16 and the sliding friction stroke of the extension 14 and the sealing member 18 are greatly reduced compared with the friction between the sealing ring and the valve plate used to achieve sealing between the valve body and the valve plate in the past, thereby increasing the service life of the elastic member 16 and the sealing member 18, and the friction movement between the valve plate 4 and the floating plate 11 during the movement of the valve plate 4, because the wear resistance and hardness of both are greatly improved compared with the elastic member 16 and the sealing member 18, so the service life of the clamping valve is also qualitatively improved when the sealing performance is improved; by 2 forms a first stuffing cavity 31 filled with stuffing box 32. When bolt 33 locks stuffing gland 30 downward, stuffing box 32 in first stuffing cavity 31 is squeezed, so that the sealing performance between valve cover 2 and valve stem 3 is improved. Then, stuffing box 36 is filled in second stuffing cavity 35 formed by gland nut 34, stuffing gland 30 and valve stem 3. By rotating gland nut 34, stuffing box 36 in second stuffing cavity 35 is squeezed, so that the sealing performance between valve stem 3 and stuffing gland 30 is improved. Double sealing is realized by valve stem stuffing, so that sealing effect is good and service life of valve is increased.

[0018] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A clamping valve, characterized in that: The utility model comprises a valve body, a valve cover, a valve stem, a valve plate and a driving device. The valve body has a flow channel for fluid flow. The valve stem is arranged on the valve body and is sealed by the valve cover. The lower end of the valve stem is connected to the valve plate, and the upper end of the valve stem is connected to the driving device. The driving device drives the valve stem to rotate so as to drive the valve plate to realize the flow diversion and cutoff of the convection channel. Both sides of the valve plate on the valve body are concave to form a chamber. A floating disk is arranged in each of the chambers. A limit block for limiting the movement angle of the floating disk is arranged on the valve body. A sealing member and an elastic member are arranged between the valve body and the floating disk. The floating disk is connected to the flow channel. A first through hole is provided in communication with the valve stem, a recessed groove is provided at the lower part of the valve body corresponding to the valve plate, a support plate is provided in the middle of the groove, and the support plate divides the groove into two positioning grooves, a second through hole is provided on the support plate in communication with the first through hole, the valve plate includes a connecting portion connected to the valve stem, two baffles are provided on the connecting portion in parallel and at intervals, the hardness of the connecting portion is less than the hardness of the baffles, when the convection channel of the valve plate is intercepted, the support plate is inserted into the interval between the two baffles, and the lower parts of the two baffles are embedded in the two positioning grooves, and the two floating plates are in surface contact with the outer sides of the two baffles respectively; The valve body is provided with a support portion coaxially with the flow channel and extending in the direction of the floating disk. The positioning blocks are evenly distributed and arranged on the outer end of the support portion. The back of the floating disk is provided with an extension portion abutting against the support portion. A guide groove is provided on the extension portion at a position corresponding to the positioning block and along the flow direction of the flow channel. The positioning block is embedded in the guide groove. The elastic member is provided between the outer end of the support portion and the floating disk. A sealing groove is provided around the outer surface of the support portion. The sealing member is embedded in the sealing groove. The valve cover is sealed and connected to the valve stem by setting a packing gland, the packing gland, the valve stem and the valve cover form a first packing cavity, the first packing cavity is filled with a stuffing box, the packing gland is locked and connected to the valve cover by bolts, and the movement direction of the bolts is the same as the axial direction of the valve stem; The upper end of the packing gland is threadedly connected with a gland nut, and the gland nut, the packing gland and the valve stem form a second packing cavity, and the second packing cavity is filled with a stuffing box. The movement direction of the gland nut is the same as the axial direction of the valve stem.

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