CN114593219B - Flat gate valve - Google Patents
Flat gate valve Download PDFInfo
- Publication number
- CN114593219B CN114593219B CN202210088825.8A CN202210088825A CN114593219B CN 114593219 B CN114593219 B CN 114593219B CN 202210088825 A CN202210088825 A CN 202210088825A CN 114593219 B CN114593219 B CN 114593219B
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- Prior art keywords
- valve
- plate
- flashboard
- auxiliary
- gate
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- 238000007789 sealing Methods 0.000 claims abstract description 71
- 230000004323 axial length Effects 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 14
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
Abstract
The invention discloses a flat gate valve. The disclosed flat gate plate comprises a valve body, a power gate plate and an auxiliary gate plate, wherein the power gate plate and the auxiliary gate plate are wedge-type gate plates, and can provide forced sealing force by an actuator when the valve is sealed, so that the sealing performance of the valve at low pressure is ensured. Further, the wedge-type elastic flashboard can effectively reduce the friction force in the opening and closing process of the valve, and effectively prolong the service life of the valve. The structure of the invention can realize on-line overhaul of the valve, improve the convenience of valve maintenance, effectively avoid valve filler leakage of the filler leakage detecting mechanism, effectively reduce the friction force between the flashboard and the sealing surface after the valve is opened, and reduce the operation thrust of the valve.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a flat gate valve capable of realizing forced sealing.
Background
The conventional tank root valve generally comprises a flat gate valve and a ball valve, however, because the tank root valve requires light weight and the like, few users select the ball valve, and because the sealing effect of the flat gate valve is superior to that of the conventional self-sealing valve due to low-pressure sealing, the tank root valve generally selects the light flat gate valve, and because the sealing effect of the valve is improved, the valve seat is generally nonmetal, but the valve opening and closing process is always in contact with the sealing surface, the sealing surface is scratched by impurity inclusion, and the valve is often leaked.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the invention provides a flat gate valve.
To this end, a flat gate valve is provided comprising:
the valve body is internally provided with a medium channel, two ends of the medium channel are respectively provided with a medium inlet and a medium outlet, and meanwhile, the valve body is also provided with a valve rod mounting hole and a valve plate working hole which are communicated with the medium channel and are coaxial with each other by taking the direction perpendicular to the medium flow direction in the medium channel as the axial direction; a forced sealing trigger piece is arranged in the valve plate working hole along the axial direction;
the power flashboard is provided with two opposite boards and two opposite side surfaces around the axial direction, one board A on the power flashboard is parallel to the axial direction, the other board B is inclined relative to the board A, the board B is provided with a wedge-shaped groove, an inner wall of the wedge-shaped groove is provided with an inner end surface along the inclined direction of the board B, and two ends of the wedge-shaped groove along the inclined direction of the board B are provided with inner end surfaces;
the auxiliary flashboard is provided with two opposite board surfaces and two opposite side surfaces around the axial direction, one board surface C on the auxiliary flashboard is parallel to the axial direction, and the other board surface D is inclined relative to the board surface C; the auxiliary flashboard is movably arranged in the wedge-shaped groove to form a combined valve plate, the board surface D is attached to the board surface B, the board surface A is opposite to the board surface C, and meanwhile, the axial length of the auxiliary flashboard is smaller than that of the wedge-shaped groove; the axial length of the wedge-shaped groove and the axial length of the auxiliary flashboard are both larger than the axial length of the medium channel;
when the valve is closed, the combined valve plate is arranged in the medium channel, one end of the combined valve plate is arranged in the valve rod mounting hole, the other end of the combined valve plate is arranged in the valve plate working hole, the plate surface A or the plate surface C faces the medium flowing direction, meanwhile, the thickness between the plate surface A and the plate surface B is smaller and smaller, the thickness between the plate surface C and the plate surface D is larger and larger, the end surface of the combined valve plate in the valve rod working hole is composed of the end surface of the power flashboard and the end surface of the auxiliary flashboard, and the forced sealing trigger piece is positioned below the auxiliary flashboard; a sealing element A is arranged between the combined valve plate and the inner wall of the valve rod mounting hole, and a sealing element B is arranged between the combined valve plate and the inner wall of the valve plate working hole.
Further, when the valve is closed, a gap is reserved between the end surfaces of the two axial ends of the auxiliary flashboard and the inner end surfaces of the two ends of the wedge-shaped groove.
Optionally, the sealing element A is arranged at the end parts of the auxiliary flashboard and the power flashboard, and the sealing element B is arranged at the other end parts of the auxiliary flashboard and the power flashboard.
Optionally, the maximum thickness between the panel a and the panel B is greater than the maximum thickness between the panel C and the panel D.
Optionally, the inclination angle of the board B relative to the board a is 5.5 ° -6.5 °, preferably 6 °; the minimum combined thickness of the combined valve plate is 71-73mm, preferably 72mm, when the power flashboard and the auxiliary flashboard move relatively.
Optionally, the combined thickness of the combined shutter increases by about 0.08-0.12mm for each 1mm downward movement of the power shutter from the auxiliary shutter contacting the forced seal trigger as the valve stem pushes the power shutter toward the valve stem mounting hole. Preferably 0.1mm.
Optionally, the forced sealing triggering piece is an adjusting screw, an elastic clamp is installed on the end face of the auxiliary flashboard, which is located in the valve rod working hole, and the elastic clamp and the adjusting screw are coaxially arranged, when the combined valve plate moves downwards into the valve plate working hole, the adjusting screw can be clamped into the elastic clamp, and when the combined valve plate moves upwards, the adjusting screw can be ejected out of the elastic clamp.
Optionally, the end portion of the adjusting screw, which can be clamped into the elastic clamp, is spherical, and a spherical space for accommodating the spherical end portion is arranged in the elastic clamp.
In a further scheme, the power flashboard comprises a guide plate and a guide pin, wherein the guide plate is arranged on the side face of the power flashboard and is positioned at the axial middle position of the side face, the guide plate is provided with a guide groove along the inclined direction of the plate face B, the guide pin is arranged on the side face of the auxiliary flashboard, and when the auxiliary flashboard moves in the groove, the guide pin moves in the guide groove. Optionally, guide plates and guide pins are installed on two side surfaces of the combined valve plate.
In further scheme, still include the spring, be equipped with first recess on face B, and this first recess is located face B's axial intermediate zone, be equipped with the second recess on the face D, when supplementary flashboard is installed in the wedge groove, first recess and second recess combination become the cavity, the spring install in the cavity, and the compression or the flexible direction of spring is followed the axial, the effort at spring both ends all acts on power flashboard and supplementary flashboard simultaneously. Furthermore, the two ends of the spring are arranged on the inner wall of the cavity through the supporting plates.
In a further scheme, sealing surface at sealing member place is equipped with spacing platform in the valve plate working hole, and supplementary deflector is installed to this spacing platform department, and supplementary deflector bottom is equipped with struts the pole and struts supplementary deflector bottom.
In a further aspect, the valve rod is mounted in the valve rod mounting hole and connected with the power flashboard.
The invention provides a flat gate valve structure, wherein the flat gate valve adopts a wedge gate plate structure to realize the forced sealing effect of the valve, and the integrated design of a sealing element improves the convenience of online overhaul of the valve. The opening-assisting structure further effectively reduces the friction force after the valve is opened, effectively reduces the operating force of the valve and prolongs the service life of the valve. In addition, the spring opening structure and the flashboard guide structure effectively ensure that the valve has stable opening force in the opening and closing process, ensure the stability of the effective maximum thickness of the flashboard, ensure that the power flashboard and the auxiliary flashboard do not deviate relatively when receiving external force, and ensure a reliable sealing state.
Compared with the prior art, the invention has the advantages that: the flashboard adopts wedge type structure to improve the sealing effect of flashboard and the capability of coping with low pressure and fire, the integrated sealing piece provides the possibility of on-line overhaul of the valve, the maintenance is more convenient, the operation of opening and closing the valve is effectively reduced by the flashboard auxiliary opening structure, the service life of the valve is prolonged by reducing the friction force of the sealing surface, the stability of the valve with stable opening force in the opening and closing process is effectively ensured by the spring opening structure and the flashboard guide structure, the stability of the effective most effective thickness of the flashboard is ensured, the relative deviation of the power flashboard and the auxiliary flashboard is avoided when the external force is received, and the reliable sealing state is ensured. The structure of the invention is also suitable for the valve with small volume on the premise of realizing the advantages.
Drawings
Fig. 1 is a schematic view showing the structure of a flat gate valve according to the present invention, wherein fig. (d) is an external structural view of the gate valve according to the present invention, and fig. (a) - (c) are sectional views of different orientations.
Fig. 2 is a schematic structural view of a combined valve plate in the flat gate valve of the present invention.
Fig. 3 is a schematic view of the bottom structure of the flat gate valve of the present invention.
FIG. 4 (a) is a schematic view showing the installation structure of the guide pin and the guide plate in the flat gate valve of the present invention; fig. 4 (b) is a schematic structural view of a spring provided in the combination valve plate of the present invention.
Detailed Description
Unless specifically stated otherwise, the terms herein are to be understood based on knowledge of one of ordinary skill in the relevant art.
The terms of axial direction, relative direction, bottom direction, lower direction and the like are consistent with the corresponding directions or orientations in the drawings of the specification, and it is to be noted that the directions or orientations in the drawings of the specification are examples of the present invention, and equivalent rotations and exchanges made by those skilled in the art based on the disclosure of the present invention are within the scope of the present invention.
The combined thickness of the combined valve plate is the sum of the thickness between the plate surface A and the plate surface B of the power flashboard and the thickness between the plate surface C and the plate surface D of the auxiliary flashboard, and the thickness of the power flashboard gradually becomes smaller along one axial direction, and the thickness of the auxiliary flashboard gradually becomes larger along the same axial direction, and meanwhile, the power flashboard and the auxiliary flashboard can move relatively, so that the combined thickness of the combined valve plate can change when the power flashboard and the auxiliary flashboard move relatively, and the resistance in the valve opening and closing process can be adjusted. Taking the structure shown in fig. 1 as an example, when the combined thickness of the combined valve plate is the maximum, the structure state between the auxiliary gate plate and the power gate plate is as shown in fig. 1, the bottom of the auxiliary gate plate is contacted with the adjusting screw, and meanwhile, the two end surfaces of the auxiliary gate plate are not contacted with the inner end surfaces of the wedge-shaped grooves; when the combined thickness of the combined valve plate is minimum, the structural states of the auxiliary flashboard and the power flashboard are as follows: the lower end surface of the auxiliary flashboard is contacted with the inner end surface of the lower end of the wedge-shaped groove.
In order to ensure reliable sealing of the flat gate valve, the conventional flat gate valve is of a medium pressure self-sealing structure. In order to improve the sealing performance, the flat gate valve provided by the invention is as shown in figures 1-3, and comprises a valve body 1, a power gate plate 2 and an auxiliary gate plate 3,
a medium channel is arranged in the valve body, a medium inlet and a medium outlet are respectively arranged at two ends of the medium channel, a valve rod mounting hole and a valve plate working hole are also arranged on the valve body, the valve rod mounting hole and the valve plate working hole are communicated with the medium channel, the direction perpendicular to the medium flow direction in the medium channel is taken as an axial direction, and the valve rod mounting hole and the valve plate working hole are coaxial; a forced sealing trigger piece 13 is arranged in the valve plate working hole along the axial direction;
two opposite plate surfaces and two opposite side surfaces are arranged on the power flashboard around the axial direction, one plate surface A on the power flashboard is parallel to the axial direction, the other plate surface B is inclined relative to the plate surface A, a wedge-shaped groove is arranged on the plate surface B, an inner wall of the wedge-shaped groove is the plate surface B, and inner end surfaces are arranged at two ends of the wedge-shaped groove along the inclined direction of the plate surface B;
two opposite plate surfaces and two opposite side surfaces are arranged on the auxiliary flashboard around the axial direction, one plate surface C on the auxiliary flashboard is parallel to the axial direction, and the other plate surface D is inclined relative to the plate surface C; the auxiliary flashboard is movably arranged in the wedge-shaped groove to form a combined valve plate, the board surface D is attached to the board surface B, the board surface A is opposite to the board surface C, and meanwhile, the axial length of the auxiliary flashboard is smaller than that of the wedge-shaped groove; the axial length of the wedge-shaped groove and the axial length of the auxiliary flashboard are both larger than the axial length of the medium channel;
when the valve is closed, the combined valve plate is arranged in the medium channel, one end of the combined valve plate is arranged in the valve rod mounting hole, the other end of the combined valve plate is arranged in the valve plate working hole, the plate surface A or the plate surface C faces the medium flowing direction, meanwhile, the thickness between the plate surface A and the plate surface B is smaller and smaller, the thickness between the plate surface C and the plate surface D is larger and larger, the end surface of the combined valve plate in the valve rod working hole is composed of the end surface of the power flashboard and the end surface of the auxiliary flashboard, and the forced sealing trigger piece is positioned below the auxiliary flashboard; a sealing element A is arranged between the combined valve plate and the inner wall of the valve rod mounting hole, and a sealing element B is arranged between the combined valve plate and the inner wall of the valve plate working hole; when the valve is opened, the valve rod pulls the power flashboard to move upwards, and when the inner end surface of the bottom of the wedge-shaped groove contacts the bottom end of the auxiliary flashboard, the power flashboard drives the auxiliary flashboard to move upwards together until the valve is opened.
The combined valve plate is of a wedge-type valve plate structure and mainly comprises a power valve plate 2 and an auxiliary valve plate 3, when the valve is closed, the auxiliary valve plate firstly descends to be in contact with a sealing trigger piece 13 due to gravity when the valve is closed, at the moment, the auxiliary valve plate 3 slides on a wedge-shaped surface of the auxiliary valve plate due to limiting reason of the sealing trigger piece, at the moment, the force transmitted to the power valve plate by an actuator through a valve rod 4 is decomposed into positive pressure and friction force applied to the auxiliary valve plate, and the power valve plate and the auxiliary valve plate respectively move in opposite directions in the horizontal direction in the pressing process of the power valve plate due to the positive pressure, so that forced sealing force is generated on a sealing surface of a valve body, and a better sealing effect is achieved.
The sealing mechanism in the valve of the invention mainly consists of a power flashboard, an auxiliary flashboard and sealing elements such as vulcanized rubber on the sealing surfaces of the power flashboard and the auxiliary flashboard. In order to improve the convenience of the maintenance of the tank root valve, in some schemes, sealing elements such as vulcanized rubber are designed on the combined flashboard, in particular to the power flashboard and the auxiliary flashboard, the design can improve the convenience of maintenance, and once the valve leaks, the operation that the sealing elements can be replaced without being taken off line can not be realized, so that the operation method is simple and convenient, and the additional functions of the valve are improved; the structure of the conventional tank root flat gate valve is simplified, the sealing reliability of the valve is improved, and the leakage point of the internal leakage of the valve is reduced.
In some embodiments, the maximum thickness between the panel a and the panel B is greater than the maximum thickness between the panel C and the panel D.
In order to reduce the resistance in the opening and closing process of the valve, in some schemes, the valve further comprises a spring 7, preferably a cylindrical spring, wherein a first groove is formed in the plate surface B and is located in the axial middle area of the plate surface B, a second groove is formed in the plate surface D, when the auxiliary flashboard is installed in the wedge-shaped groove, the first groove and the second groove are combined to form a cavity, the spring is installed in the cavity, the compression or expansion direction of the spring is along the axial direction, and meanwhile acting forces at two ends of the spring are simultaneously applied to the power flashboard and the auxiliary flashboard. The wedge-type flashboard composed of the power flashboard and the auxiliary flashboard is internally provided with a precompression spring, so that after the flashboard is assembled and installed, the flashboard component is always in the minimum combined thickness of the combined flashboard component in the opening and closing process (namely, the lower end surface of the auxiliary flashboard is contacted with the inner end surface of the lower end of the wedge-type groove), and the acting forces at the two ends of the spring are required to be satisfied to be simultaneously acted on the auxiliary flashboard and the power flashboard during assembly. In a further scheme, the upper end face and the lower end face of the cylindrical spring are provided with support plates 6, so that the spring is in integral stress of the end faces when the power flashboard and the auxiliary flashboard move relatively, and stability of stress of the spring is guaranteed. In a further scheme, in order to solve the reasons such as processing error and the like and cause after the installation of the cylindrical spring, relative looseness appears when not pushing down, half grooves (namely half grooves forming a cavity, first grooves or second grooves) arranged on the power flashboard or the auxiliary flashboard are positioned at the axial middle positions of corresponding board surfaces, the other half grooves are offset upwards or downwards by 1-2mm in the axial direction relative to the axial middle positions, the condition of relative looseness of installation is avoided, and the stress of the end surfaces of the power flashboard and the auxiliary flashboard respectively after the compression spring is installed is ensured. In some schemes, a plurality of first grooves are formed in the plate surface B, a corresponding number of second grooves are formed in the plate surface D, namely a plurality of cavities are formed after assembly, and springs are installed in each cavity, and two cavities are shown in the figure.
When the valve is closed, the auxiliary flashboard firstly descends to contact with the sealing trigger piece 13 due to gravity and the reason that the built-in spring 7 is spread out due to the downward movement of the flashboard; in the valve opening process, the built-in spring 7 also enables the combined valve plate to shrink and the combined thickness to be reduced, and the flashboard moves upwards until the flashboard is completely opened under the action of the valve rod.
The valve is closed, the power flashboard 2 and the auxiliary flashboard 3 are possibly wedged when the reasons such as sealing thrust and medium viscosity are all caused, or in some schemes, the deformation force provided by the spring 7 can not overcome the wedging force generated when the power flashboard and the auxiliary flashboard are forcedly sealed, so that the total thickness of the gate valve in the valve opening and closing process can not be ensured to be kept within the minimum combined thickness, the flashboard is caused to be consistent and has contact friction with the sealing surface, thereby the service life of the valve is reduced, in order to overcome the problem, the forced sealing trigger piece 13 in the scheme is an adjusting screw, the end surface of the auxiliary flashboard in a valve rod working hole is provided with an elastic clamp 12, the elastic clamp and the adjusting screw are coaxially arranged, when the combined valve plate moves downwards into the valve plate working hole, the adjusting screw can be clamped into the elastic clamp, and when the combined valve plate moves upwards, the adjusting screw can be ejected out of the elastic clamp. The elastic clamp 12 is designed into a spherical groove structure, has higher elasticity, the head of the adjusting screw is of a spherical structure, the elastic clamp clamps the head of the adjusting screw after the valve is limited, the power flashboard moves upwards under the action of an actuator force when the valve is opened, the clamping force of the elastic clamp is favorable for overcoming the wedging force between the power flashboard and the auxiliary flashboard, and then, when the valve is opened and closed, the power flashboard and the auxiliary flashboard are in the minimum combined thickness, and meanwhile, friction and abrasion of a sealing surface are reduced, so that the service life of the valve is prolonged. In the specific scheme, the elastic clamp is arranged on the bottom end face of the auxiliary flashboard 3 through a screw 14 and a gasket 15.
Based on the scheme, for the valve with the elastic clamp 12 and the built-in spring 7, when the valve is closed, the valve rod power flashboard 2 and the auxiliary flashboard 3 move downwards together, when the auxiliary flashboard contacts with the adjusting screw 13 to trigger forced sealing, when the valve rod moves downwards again, the thickness of a combined valve plate formed by the power flashboard and the auxiliary flashboard becomes large, and component forces in two directions are generated between wedge faces of the two valve plates, one of the component forces moves vertically downwards, and the other component force moves horizontally along the direction of a flow passage, so that forced sealing is realized, when the deformation force of the cylindrical spring 7 built-in the flashboard increases to be beneficial to opening of the valve, the wedge force between the power flashboard and the auxiliary flashboard is eliminated, and the elastic clamp 12 is arranged at the bottom of the auxiliary flashboard to clamp the spherical head of the adjusting screw 13 and limit the spherical head of the adjusting screw 13;
when the valve is opened, the valve rod pulls the power flashboard, when the power flashboard moves upwards to open the valve, after the power flashboard is pulled upwards to pass through a gap between the bottom of the wedge-shaped groove and the bottom end face of the auxiliary flashboard, the power flashboard contacts with the bottom face of the auxiliary flashboard, the power flashboard moves upwards to drive the auxiliary flashboard to move upwards at the moment, the elastic chucks on the auxiliary flashboard start to be separated from the adjusting screws, the thickness of the combined valve plate is reduced, the wedging force between the power flashboard and the auxiliary flashboard is completely eliminated in the process, the combined flashboard also starts to shrink under the action of the built-in spring, and the flashboard moves upwards all the time until the valve rod is completely opened.
In order to avoid the phenomena of rotation, offset or clamping stagnation and the like of the combined valve plate when the valve is closed, some schemes further comprise a guide plate 11 and a guide pin 10, wherein the guide plate is arranged on the side face of the power flashboard and is positioned at the axial middle position of the side face, a guide groove is formed in the guide plate along the inclined direction of the plate face B, the guide pin is arranged on the side face of the auxiliary flashboard, and when the auxiliary flashboard moves in the groove, the guide pin moves in the guide groove. In the concrete scheme, the guide pin is arranged on the side surface of the auxiliary flashboard by using end threads, and is loose-proof by using anaerobic thread glue, and the guide plate is arranged on the power flashboard by using bolts 16 and bolt gaskets 17. When the valve is closed, when the auxiliary flashboard is not in contact with the forced sealing trigger piece, the guide pin and the guide plate are relatively static, and the guide pin and the guide plate have the functions of preventing relative rotation and front-back offset along the flow passage direction in the opening and closing process of the combined flashboard, so that effective sealing when the valve is closed is ensured, and the normal action when the valve is opened and closed is used for preventing clamping stagnation caused by overlarge offset; after the auxiliary flashboard contacts with the forced sealing trigger piece, the guide plate is limited due to the auxiliary flashboard when moving downwards along with the power flashboard, and the No. 10 guide pin is used as a guide piece for the relative movement of the power flashboard and the auxiliary flashboard, so that the position deviation is prevented; the guide pin and the guide plate in the valve opening process 1 also provide an auxiliary limit guide function, and the function is similar to closing.
In order to ensure that the deflection of the sealing surface in the working hole of the relative valve plate does not occur in the process of opening and closing the gate plate, the sealing surface is provided with a limiting table, an auxiliary guide plate 18 is arranged on the sealing surface, the deflection of the relative sealing surface does not occur in the process of opening and closing the gate plate, the sealing reliability is ensured, meanwhile, in order to ensure that the guide plate does not separate from the limiting table of the sealing surface when the gate plate is fully opened, the bottom of the auxiliary guide plate is provided with an expanding rod 8 fixed by an adjusting nut 9, the guide plate is ensured not to shrink towards the gate plate when the valve is fully opened, and the reliability of the gate plate guide is ensured.
In a more preferred scheme, in order to reduce the technical requirements of forced sealing type wedging force self-locking of the combined flashboard and overall light weight of the valve, a person skilled in the art can select the relative inclination angle of two boards on the power flashboard or the relative inclination angle of two boards on the auxiliary flashboard according to actual requirements. The relative inclination angle of the two plates on the power flashboard or the relative inclination angle of the two plates on the auxiliary flashboard is 6 degrees. Meanwhile, in order to meet the requirements of mechanical strength of the flashboard and light-weight technology of the valve, a person skilled in the art can select a minimum combined thickness of the combined valve plate, and an example is that the minimum combined thickness of the combined valve plate is 72mm. In addition, to meet the requirements of the forced sealing technology, a person skilled in the art can also select a rate of change of the combined thickness of the combined valve plate when the valve is closed, and by way of example, when the forced sealing is triggered, the thickness of the combined valve plate increases by about 0.1mm every time the power valve plate moves down by 1mm.
In a preferred scheme, on the basis of the above dimensions, the axial length of the power flashboard is 445mm, the width is 415mm, and the maximum thickness of the power flashboard is: 72mm, a minimum thickness of 26mm; the axial length of the wedge-shaped groove is 430mm; the axial length of the auxiliary flashboard is 420mm, the width of the auxiliary flashboard is 414.5mm, the maximum thickness of the auxiliary flashboard is 62mm, and the minimum thickness of the auxiliary flashboard is 20mm. Compared with the volume of the existing valve, the valve with the size has small volume and light weight, and the sealing performance meets the requirements of actual working conditions.
In some products, a valve cover 5 is arranged on the basis of the scheme, and a valve rod mounting hole is arranged on the valve cover 5 and is assembled with a valve body to form the valve structure shown in fig. 1 or 2.
It should be noted that the scope of the present invention is not limited to the embodiments described in the above embodiments, but only falls within the scope of the present invention as long as the combination of technical features of the claims of the present invention is satisfied.
Claims (14)
1. A flat gate valve, comprising:
the valve body (1) is internally provided with a medium channel, two ends of the medium channel are respectively provided with a medium inlet and a medium outlet, and meanwhile, the valve body is also provided with a valve rod mounting hole and a valve plate working hole which are communicated with the medium channel and are coaxial with each other by taking a direction perpendicular to the medium flow direction in the medium channel as an axial direction; a forced sealing trigger piece (13) is arranged in the valve plate working hole along the axial direction;
the power flashboard (2) is provided with two opposite boards and two opposite side surfaces around the axial direction, one board A on the power flashboard is parallel to the axial direction, the other board B is inclined relative to the board A, the board B is provided with a wedge-shaped groove, one inner wall of the wedge-shaped groove is the board B, and two ends of the wedge-shaped groove along the inclination direction of the board B are provided with inner end surfaces;
an auxiliary gate (3) provided with two opposite plate surfaces and two opposite side surfaces around the axial direction, wherein one plate surface C of the auxiliary gate is parallel to the axial direction, and the other plate surface D is inclined relative to the plate surface C; the auxiliary flashboard is movably arranged in the wedge-shaped groove to form a combined valve plate, the board surface D is attached to the board surface B, the board surface A is opposite to the board surface C, and meanwhile, the axial length of the auxiliary flashboard is smaller than that of the wedge-shaped groove; the axial length of the wedge-shaped groove and the axial length of the auxiliary flashboard are both larger than the axial length of the medium channel;
when the valve is closed, the combined valve plate is arranged in the medium channel, one end of the combined valve plate is arranged in the valve rod mounting hole, the other end of the combined valve plate is arranged in the valve plate working hole, the plate surface A or the plate surface C faces the medium flowing direction, meanwhile, the thickness between the plate surface A and the plate surface B is smaller and smaller, the thickness between the plate surface C and the plate surface D is larger and larger, the end surface of the combined valve plate in the valve rod working hole is composed of the end surface of the power flashboard and the end surface of the auxiliary flashboard, and the forced sealing trigger piece is positioned below the auxiliary flashboard; a sealing element A is arranged between the combined valve plate and the inner wall of the valve rod mounting hole, and a sealing element B is arranged between the combined valve plate and the inner wall of the valve plate working hole.
2. The flat gate valve of claim 1, wherein a gap is left between end surfaces of both ends of the auxiliary shutter in the axial direction and inner end surfaces of both ends of the wedge-shaped groove when the valve is closed.
3. The flat gate valve of claim 1, wherein the seal a is provided at an end of the auxiliary gate and the power gate, and the seal B is provided at the other end of the auxiliary gate and the power gate.
4. The flat gate valve of claim 1, wherein a maximum thickness between the faces a and B is greater than a maximum thickness between the faces C and D.
5. The flat gate valve of claim 1, wherein the angle of inclination of the panel B with respect to the panel a is 5.5 ° -6.5 °; the minimum combined thickness of the combined valve plate is 71-73mm when the power flashboard and the auxiliary flashboard move relatively.
6. The flat gate valve of claim 1, wherein the combined thickness of the composite gate increases by about 0.08-0.12mm for each 1 millimeter downward movement of the power gate from the auxiliary gate contacting the positive seal trigger as the valve stem pushes the power gate toward the valve stem mounting hole.
7. The flat gate valve according to claim 1, wherein the forced sealing trigger (13) is an adjusting screw, an elastic clamp (12) is mounted on the end surface of the auxiliary gate plate, which is positioned in the valve rod working hole, and the elastic clamp and the adjusting screw are coaxially arranged, when the combined valve plate moves downwards into the valve plate working hole, the adjusting screw can be clamped into the elastic clamp, and when the combined valve plate moves upwards, the adjusting screw can be ejected into the elastic clamp.
8. The flat gate valve of claim 7, wherein the end of the adjusting screw that can be snapped into the spring clip is spherical, and a spherical space is provided in the spring clip that accommodates the spherical end.
9. The flat gate valve according to claim 1, further comprising a guide plate (11) mounted on a side surface of the power gate and located at an axially middle position of the side surface, the guide plate being provided with a guide groove in an inclined direction of the plate surface B, and a guide pin (10) mounted on a side surface of the auxiliary gate, the guide pin being movable in the guide groove when the auxiliary gate is movable in the wedge-shaped groove.
10. The flat gate valve of claim 9, wherein both side surfaces of the combination valve plate are provided with guide plates and guide pins.
11. The flat gate valve according to claim 1, further comprising a spring (7), wherein a first groove is formed in the plate surface B and is located in an axial middle area of the plate surface B, a second groove is formed in the plate surface D, when the auxiliary gate plate is mounted in the wedge-shaped groove, the first groove and the second groove are combined to form a cavity, the spring is mounted in the cavity, the compression or expansion direction of the spring is along the axial direction, and acting forces at two ends of the spring simultaneously act on the power gate plate and the auxiliary gate plate.
12. The flat gate valve according to claim 11, wherein both ends of the spring are mounted to the inner wall of the cavity through support plates (6).
13. The flat gate valve according to claim 1, wherein a limit table is arranged on a sealing surface of the valve plate working hole where the sealing element is located, an auxiliary guide plate (18) is arranged at the limit table, and a supporting rod is arranged at the bottom of the auxiliary guide plate to support the bottom of the auxiliary guide plate.
14. The flat gate valve of claim 1, further comprising a valve stem (4) mounted in the valve stem mounting hole and connected to the power gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210088825.8A CN114593219B (en) | 2022-01-25 | 2022-01-25 | Flat gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210088825.8A CN114593219B (en) | 2022-01-25 | 2022-01-25 | Flat gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114593219A CN114593219A (en) | 2022-06-07 |
| CN114593219B true CN114593219B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210088825.8A Active CN114593219B (en) | 2022-01-25 | 2022-01-25 | Flat gate valve |
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| Country | Link |
|---|---|
| CN (1) | CN114593219B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968093A (en) * | 2014-04-22 | 2014-08-06 | 章华 | Propped open type parallel dual-gate valve with deflector hole |
| CN104455511A (en) * | 2013-09-22 | 2015-03-25 | 中国石化工程建设有限公司 | Large-caliber high-temperature wear-resistant flat gate valve |
| EP2921753A1 (en) * | 2014-03-21 | 2015-09-23 | Techspace Aero S.A. | Aerospace solenoid valve for high-pressure cryogenic gas |
| CN108506509A (en) * | 2018-06-27 | 2018-09-07 | 上海阀门厂股份有限公司 | A kind of gate valve sealing structure |
-
2022
- 2022-01-25 CN CN202210088825.8A patent/CN114593219B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455511A (en) * | 2013-09-22 | 2015-03-25 | 中国石化工程建设有限公司 | Large-caliber high-temperature wear-resistant flat gate valve |
| EP2921753A1 (en) * | 2014-03-21 | 2015-09-23 | Techspace Aero S.A. | Aerospace solenoid valve for high-pressure cryogenic gas |
| CN103968093A (en) * | 2014-04-22 | 2014-08-06 | 章华 | Propped open type parallel dual-gate valve with deflector hole |
| CN108506509A (en) * | 2018-06-27 | 2018-09-07 | 上海阀门厂股份有限公司 | A kind of gate valve sealing structure |
Non-Patent Citations (1)
| Title |
|---|
| 高压闸阀阀板与阀座摩擦因数的试验研究;钟功祥;吕治中;梁政;;石油矿场机械(02);全文 * |
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|---|---|
| CN114593219A (en) | 2022-06-07 |
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Effective date of registration: 20230222 Address after: 100020 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Applicant after: XI'AN AEROSPACE PROPULSION INSTITUTE Address before: 100020 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant before: CHINA PETROLEUM & CHEMICAL Corp. Applicant before: South China branch of Sinopec Sales Co.,Ltd. Applicant before: XI'AN AEROSPACE PROPULSION INSTITUTE Applicant before: XI'AN AEROSPACE YUANZHENG FLUID CONTROL Co.,Ltd. |
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