Valve plate and valve applying same

Abstract

The valve plate comprises a wedge-shaped block, expansion blocks and sealing discs, the expansion blocks are symmetrically and movably connected to the two sides of the wedge-shaped block, the side, away from the wedge-shaped block, of each expansion block is fixed to one sealing disc, and when the wedge-shaped block is pressed downwards, the expansion blocks on the two sides are extruded to control the sealing discs on the two sides to be expanded; a plurality of arc-shaped grooves are evenly formed in the main sealing face of the sealing disc in the circumferential direction, elastic sealing layers are embedded into the arc-shaped grooves, and a main sealing layer is arranged outside the main sealing face of the sealing disc. According to the utility model, the wedge-shaped blocks are continuously pressed downwards when the sealing discs are in contact with the bottom, so that the two sealing discs are controlled to move towards two sides by utilizing the inclined surface shapes of the wedge-shaped blocks so as to abut against the valve seat, and a good sealing effect can be kept even if the surface of the valve plate is abraded; a composite sealing structure is formed on the main sealing face of the sealing disc through the elastic sealing layer and the main sealing layer, and high-pressure sealing and abrasion compensation are achieved in a rigid-flexible combination mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to flat gate valve technical field especially a valve plate and application this valve plate's valve. BACKGROUND

[0002] In the oil production system, the flat gate valve is a vital component in the oil field equipment, mainly used for controlling the exploitation state of oil well and adjusting oil and gas flow. The flat gate valve is usually composed of valve body, valve seat, gate, valve stem and other components, among which, the gate is the key component for controlling medium flow, and its design needs to ensure close cooperation with the valve seat to prevent leakage.

[0003] However, the existing valve plate is an integral plate structure, and the valve plate and the valve seat are directly rubbed during opening and closing operation. Long-term friction causes the valve plate surface to wear out and cannot be compensated, thereby shortening the service life and affecting the sealing performance.

[0004] Therefore, we propose a valve plate and a valve using the valve plate to solve the above problems. Utility model content

[0005] The utility model aims at providing a valve plate and a valve using the valve plate to solve the problems raised in the background.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A valve plate, comprising a wedge-shaped block, a bulge block and a sealing disc, the bulge block is symmetrically movably connected on both sides of the wedge-shaped block, and the side away from the wedge-shaped block of each bulge block is fixed with a sealing disc, and when the wedge-shaped block is pressed down, the two sides of the bulge block are extruded to control the bulge of the two sides of the sealing disc.

[0008] The main sealing surface of the sealing disc is uniformly provided with a plurality of arc-shaped grooves along the circumference, and the inside of the arc-shaped groove is embedded with an elastic sealing layer, and the main sealing surface of the sealing disc is externally provided with a main sealing layer.

[0009] In further embodiments, the two side outer walls of the wedge-shaped block are symmetrically provided with a groove part one, and the lower part of the groove part one is provided with a slope part one, and the slope part one is externally provided with a protruding block part one.

[0010] In further embodiments, the bulge block is provided with a protruding block part two corresponding to the position of the groove part one, and the protruding block part two is provided with a slope part two, and the slope part two has the same slope as the slope part one, and the inside of the slope part two is provided with a groove part two matched with the protruding block part one.

[0011] In further embodiments, the material of the elastic sealing layer is one of fluorine rubber or hydrogenated butyronitrile rubber.

[0012] In a further embodiment, the material of the main sealing layer is cobalt-based hard alloy.

[0013] In a further embodiment, a stepped groove is formed in the middle of the main sealing surface of the sealing disc, and a spiral flow guide groove is formed on the surface of the stepped groove along the circumference.

[0014] In a further embodiment, the surfaces of the stepped groove and the flow guide groove are provided with a wear-resistant layer, which includes a nickel-based alloy base layer, a tungsten carbide cobalt alloy support layer, and an ultra-fine tungsten carbide particle surface layer.

[0015] A valve includes the valve plate, and further includes a valve body, a valve stem, and a hand wheel, a pair of valve seat rings are installed in the passage of the valve body, the valve plate is installed between the pair of valve seat rings, the valve stem is rotatably installed on the valve body, and a screw cylinder is threadedly connected to the bottom end of the valve stem, the bottom end of the screw cylinder is fixedly connected with a wedge-shaped block, and a limiting cover is further arranged on the valve seat ring.

[0016] Compared with the prior art, the valve plate has the following beneficial effects:

[0017] The wedge-shaped block can not only drive the sealing disc to move up and down to realize opening or closing, but also can continue to press down when the sealing disc touches the bottom, so as to extrude the two side expansion blocks by the inclined surface shape to control the movement of the two sealing discs to the sides, so as to tightly abut against the valve seat, and even after the surface of the valve plate is worn, the good sealing effect can be maintained.

[0018] The elastic sealing layer and the main sealing layer form a composite sealing structure on the main sealing surface of the sealing disc, the main sealing layer provides main sealing, and the elastic sealing layer compensates for micro deformation, so that high-pressure sealing and wear compensation are realized by the rigid and flexible combination. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a valve plate structure schematic view of the utility model;

[0020] Figure 2 It is a wedge-shaped block structure schematic view of the utility model;

[0021] Figure 3 It is an expansion block structure schematic view of the utility model;

[0022] Figure 4 It is a valve plate cross-section structure schematic view of the utility model;

[0023] Figure 5 It is a sealing disc front view cross-section structure schematic view of the utility model;

[0024] Figure 6 It is a sealing disc side view partial cross-section structure schematic view of the utility model;

[0025] Figure 7 It is a valve cross section structure schematic view of the utility model.

[0026] In the drawing: 1, wedge block;11, recess part one;12, inclined surface part one;13, protruding block part one;2, bulge block;21, protruding block part two;22, inclined surface part two;23, recess part two;3, sealing disc;31, arc-shaped groove;32, elastic sealing layer;33, main sealing layer;34, stepped groove;35, flow guide groove;36, wear-resistant layer;4, valve body;5, valve seat ring;6, limiting cover;7, screw cylinder;8, valve rod;9, hand wheel. DETAILED DESCRIPTION

[0027] In the description of the utility model, it needs to be understood that, the orientation or position relation indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation to the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0028] In the description of the utility model, it needs to be understood that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;It can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely in the description of the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0030] Please refer to Figures 1-6The utility model provides a valve plate, including wedge 1, bulge 2 and sealing disc 3, bulge 2 is symmetrically connected in motion on both sides of wedge 1, and the side of each bulge 2 away from wedge 1 is fixed with a sealing disc 3, the both sides outer wall of wedge 1 is symmetrically provided with recess part one 11, and the recess part one 11 is provided with inclined surface part one 12 below, the inclined surface part one 12 is provided with protruding block part one 13 outward, bulge 2 is provided with protruding block part two 21 in the position corresponding to recess part one 11, and the protruding block part two 21 is provided with inclined surface part two 22, the inclined surface part two 22 is same with the slope of inclined surface part one 12, and the inside of inclined surface part two 22 is provided with recess part two 23 matched with protruding block part one 13, when sealing disc 3 touches the bottom, wedge 1 presses down, inclined surface part one 12 and inclined surface part two 22 rub each other, protruding block part two 21 moves in recess part one 11, protruding block part one 13 moves in recess part two 23, and the both sides bulge 2 are extruded by the shape of inclined surface, to control the both sides sealing disc 3 to move to both sides.

[0031] In order to further improve the sealing performance, the main sealing surface of the sealing disc 3 is uniformly provided with a plurality of arc grooves 31 along the circumference, and the arc grooves 31 are embedded with elastic sealing layers 32, the sealing disc 3 is made of 35CrMo alloy steel, which has both strength and toughness, the material of the elastic sealing layer 32 is one of fluororubber or hydrogenated nitrile rubber, after the arc grooves 31 are filled, the material of the elastic sealing layer 32 needs to be 1-2 mm higher than the surface of the sealing disc 3 to ensure the pre-compression amount, and the main sealing surface of the sealing disc 3 is provided with a main sealing layer 33 made of cobalt-based hard alloy, which is combined firmly by means of surfacing and laser cladding process.

[0032] Further, in order to reduce the deposition of particles in the flow medium on the main sealing surface of the sealing disc 3 when the valve plate is applied, which affects the sealing effect, a stepped groove 34 is arranged in the middle of the main sealing surface of the sealing disc 3, so that the flow medium mainly impacts on the stepped groove 34, reducing the spread to the main sealing surface, and the surface of the stepped groove 34 is provided with a spiral flow guide groove 35 along the circumference, so that when the sand-containing medium flows through the valve plate, the flow guide groove 35 guides the solid particles to the edge through the spiral centrifugal effect, avoiding the deposition on the sealing surface, the groove structure increases the local flow rate and enhances the particle carrying capacity, and the surfaces of the stepped groove 34 and the flow guide groove 35 are provided with wear-resistant layers 36, which include a nickel-based alloy base layer, a tungsten carbide cobalt alloy support layer and a superfine tungsten carbide particle surface layer, the nickel-based alloy base layer is processed by laser cladding process, which has strong metallurgical combination and prevents interlayer peeling, and the tungsten carbide cobalt alloy support layer and the superfine tungsten carbide particle surface layer are sprayed by supersonic speed flame, the tungsten carbide cobalt alloy support layer absorbs the impact load to provide a super-hard barrier for the residual particles, forming a double protection.

[0033] Please refer to Figure 7The utility model provides a valve, including valve plate, still include valve body 4, valve stem 8 and hand wheel 9, and the channel of valve body 4 is installed with a pair of valve seat ring 5, and the valve plate is installed between the pair of valve seat ring 5, and the annular surface of sealing disc 3 when being in contact with valve seat ring 5 is main sealing surface, and valve stem 8 is rotatably installed on valve body 4, and hand wheel 9 is fixed on the top end of valve stem 8, and the bottom end of valve stem 8 is screw-connected with screw cylinder 7, and the bottom end of screw cylinder 7 is fixedly connected with wedge block 1, and still be equipped with limit cap 6 on valve seat ring 5, so that sealing disc 3 cannot be deflected and moves in valve body 4 under the limiting action of valve seat ring 5 and limit cap 6, thereby forming the limiting of screw cylinder 7, so that valve stem 8 is rotated, and under the cooperation of the thread action, screw cylinder 7 drives valve plate to lift and opens valve, and then drops and closes valve.

[0034] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A valve plate, characterized by: It includes wedge block (1), bulge block (2) and sealing disc (3), the bulge block (2) is symmetrically connected on both sides of wedge block (1), and the side of each bulge block (2) away from wedge block (1) is fixed with a sealing disc (3), when the wedge block (1) is pressed, the two sides bulge block (2) are extruded to control the two sides sealing disc (3) to expand. The main sealing surface of the sealing disc (3) is uniformly provided with a plurality of arc grooves (31) along the circumference, and the arc grooves (31) are embedded with elastic sealing layer (32), and the main sealing surface of the sealing disc (3) is provided with main sealing layer (33).

2. A valve plate according to claim 1, characterised in that: The both sides outer wall of the wedge block (1) is symmetrically provided with groove part one (11), and the groove part one (11) is provided with inclined surface part one (12) below, and the inclined surface part one (12) is provided with protruding block part one (13) outside.

3. A valve plate according to claim 2, characterised in that: The bulge block (2) is provided with protruding block part two (21) corresponding to the position of groove part one (11), and the protruding block part two (21) is provided with inclined surface part two (22), and the slope of the inclined surface part two (22) is same with the slope of the inclined surface part one (12), and the inside of the inclined surface part two (22) is provided with groove part two (23) matched with the protruding block part one (13).

4. A valve plate according to claim 1, wherein: The material of the elastic sealing layer (32) is one of fluorine rubber or hydrogenated butyronitrile rubber.

5. A valve plate according to claim 1, characterized in that: The material of the main sealing layer (33) is cobalt-based hard alloy.

6. A valve plate according to claim 1, characterized in that: The middle part of the main sealing surface of the sealing disc (3) is provided with stepped groove (34), and the surface of the stepped groove (34) is provided with spiral flow guide groove (35) along the circumference.

7. A valve plate according to claim 6, characterised in that: The surface of the stepped groove (34) and the flow guide groove (35) is provided with wear-resistant layer (36), and the wear-resistant layer (36) includes nickel-based alloy base layer, tungsten carbide cobalt alloy support layer and superfine tungsten carbide particle surface layer.

8. A valve characterized by: It includes the valve plate of any one of claims 1-7, further comprising valve body (4), valve stem (8) and hand wheel (9), the passage in the valve body (4) is provided with a pair of valve seat ring (5), the valve plate is installed between the pair of valve seat ring (5), the valve stem (8) is rotatably installed on the valve body (4), and the bottom end of the valve stem (8) is threadedly connected with the screw cylinder (7), the bottom end of the screw cylinder (7) is fixedly connected with the wedge block (1), and the valve seat ring (5) is further provided with limiting cover (6).

Images