High-temperature and high-pressure angle stop valve

Abstract

The high-temperature and high-pressure angle stop valve comprises a valve body, a valve rod, a valve cover, a valve clack and a valve seat, the valve clack comprises a main body part and an extension part, the main body part is used for being attached to the end face of the valve seat, the extension part is used for extending into the inner side of the valve seat, and a first sealing face is arranged on the outer wall of the extension part; the inner wall of the valve seat is provided with a second sealing face matched with the first sealing face in a sealing mode, a first groove is formed in the position, corresponding to the side portion of the second sealing face, of the valve seat in a sunken mode, a thickening layer is further arranged at the end of the extending portion, and a second groove is formed between the side face of the thickening layer and the first sealing face. When the valve clack is matched with the valve seat in a sealing mode, the first groove is sealed by the first sealing face, the second groove is sealed by the inner wall of the valve seat, the first groove is formed in the valve seat and matched with the second groove in the valve clack, in the closing process of the valve clack, a medium can flow into the first groove and the second groove, a pressure buffering area is formed, and therefore the valve clack is closed. And the device is suitable for high-temperature and high-pressure working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially is related to a high temperature and high pressure angle type stop valve. BACKGROUND

[0002] The stop valve is also called the cut-off valve, belongs to the forced sealing type valve, so when the valve is closed, must apply pressure to the valve clapper, to force the sealing surface not to leak, the opening and closing part of the stop valve is the plug-shaped valve clapper, the sealing surface is flat or the sea cone surface, the valve clapper makes linear motion along the center line of the valve seat.

[0003] The stop valve can be classified as straight-through type stop valve, straight current type stop valve, angle type stop valve according to the channel direction inside the valve body, in the angle type stop valve, fluid only needs to change once direction, so that the pressure drop through this valve is less than the stop valve of conventional structure.

[0004] And the angle type stop valve usually adopts the flow direction design of low inlet and high outlet, makes the fluid resistance small, saves the labor when opening the valve clapper, if works under the high temperature and high pressure working condition, especially in the valve clapper closing process, high pressure can cause the valve clapper to be difficult to close, and further produces the problems such as leakage, failure, so need to propose a kind of angle type stop valve suitable for high temperature and high pressure. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a kind of high temperature and high pressure angle type stop valves to overcome the shortcomings and deficiencies of prior art, and the utility model is provided, by being provided with first recess on valve seat, cooperate with second recess on valve clapper, first recess and second recess can be supplied with medium flow in during the valve clapper closing process, form pressure buffer zone, to reduce pressure, applicable to high temperature and high pressure working condition.

[0006] The technical scheme adopted by the utility model is as follows: high temperature and high pressure angle type stop valve, including valve body, valve stem, valve cover, valve clapper and valve seat, the channel is equipped in the valve body, the valve clapper and valve seat sealing cooperation divide the channel into import channel and export channel, the valve cover is set at one end of valve body, the valve stem is connected with valve clapper by penetrating valve cover, the valve clapper includes main part and extension, the main part is used for with the end surface of valve seat is attached, the extension is used for extending into the inside of valve seat, the outer wall of the extension is equipped with first sealing surface, the inner wall of the valve seat is equipped with second sealing surface that is sealed with first sealing surface, the side of the valve seat corresponding to second sealing surface is recessed with first recess, the end of the extension is also equipped with thickening layer, the side of the thickening layer and first sealing surface form second recess, when the valve clapper and valve seat sealing cooperation first recess is closed by first sealing surface, and the inner wall of the valve seat closes second recess.

[0007] The valve seat can be detachably arranged in the valve body, and a sealing compression ring is further arranged between the valve seat and the valve body.

[0008] The end face of the valve seat is further provided with an annular protrusion which is in contact with the main body when the valve disc is in sealing engagement with the valve seat.

[0009] The valve disc further comprises a connecting portion for connecting with the valve stem, the connecting portion extends outwardly with a diaphragm, the outer edge of the diaphragm is bent with a folded plate which extends to the gap between the valve cover and the valve body, and the diaphragm and the valve cover form a sealed cavity which is separated from the channel.

[0010] The outer wall of the extending portion is a first tapered surface which is contracted away from the valve stem, and the outer wall of the connecting portion is a second tapered surface which is contracted towards the valve stem.

[0011] The diaphragm is made of elastic material.

[0012] The valve stem and the valve cover are provided with a sealing assembly, the sealing assembly comprises a first sealing ring, a second sealing ring and a third sealing ring which are distributed from top to bottom along the axis of the valve stem.

[0013] The first sealing ring and the third sealing ring are made of elastic material, and the second sealing ring is made of hard metal material.

[0014] The beneficial effects of the utility model are as follows: the utility model discloses a first recess is arranged on the valve seat, and a second recess is arranged on the valve disc, the first recess and the second recess can be used for medium inflow in the closing process of the valve disc, a pressure buffer area is formed, thereby reducing pressure, and the utility model is suitable for high-temperature and high-pressure working conditions, the reverse structure design of the first recess and the second recess makes the medium pressure form a reverse force in the closing process of the valve disc, the opening and closing of the valve disc are more labor-saving, and the first recess and the second recess can also form a multistage sealing barrier, and good sealing performance is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0016] Figure 1 It is a structural schematic diagram of the high-temperature and high-pressure angle type stop valve of the utility model;

[0017] Figure 2 It is a sectional view schematic diagram of the utility model;

[0018] Figure 3 It is Figure 2 It is a local enlarged schematic diagram of A in the middle;

[0019] Figure 4 For Figure 2 A local enlarged schematic view at B in the middle;

[0020] Figure 5 For the use state of the sealing assembly in the utility model, reference is made to the drawing;

[0021] In the drawing, 1-valve body, 2-valve rod, 3-valve cover, 4-valve flap, 5-valve seat, 6-inlet channel, 7-outlet channel, 8-main body part, 9-extension part, 10-first sealing surface, 11-second sealing surface, 12-first groove, 13-thickened layer, 14-second groove, 15-sealing compression ring, 16-annular protrusion, 17-connection part, 18-diaphragm, 19-folded plate, 20-sealing cavity, 21-first conical surface, 22-second conical surface, 23-first sealing ring, 24-second sealing ring, 25-third sealing ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described in further detail below in combination with the drawings.

[0023] It should be noted that all the expressions of "first" and "second" in the embodiments of the utility model are used to distinguish two same name non-same entities or non-same parameters, and it can be seen that "first" and "second" are only for the convenience of expression and should not be understood as the limitation of the embodiments of the utility model, and the subsequent embodiments will not be described one by one.

[0024] The directions and position phrases mentioned in the utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only the directions or positions of the drawings. Therefore, the directions and position phrases used are used to explain and understand the utility model, and are not the limitation of the protection scope of the utility model.

[0025] As Figures 1 to 5As shown, it is an embodiment of the utility model, high temperature high pressure angle type stop valve, including valve body 1, valve stem 2, valve cover 3, valve clapper 4 and valve seat 5, be equipped with passageway in valve body 1, valve clapper 4 and valve seat 5 sealed fit will passageway be divided into import passageway 6 and export passageway 7, valve cover 3 sets up in one end of valve body 1, valve stem 2 is passed through valve cover 3 and is connected with valve clapper 4, valve clapper 4 includes main part 8 and extension 9, main part 8 is used for with the end face of valve seat 5 and is pasted, extension 9 is used for extending into the inside of valve seat 5, the outer wall of extension 9 is equipped with first sealing surface 10, the inner wall of valve seat 5 is equipped with second sealing surface 11 with the sealed fit of first sealing surface 10, the side of valve seat 5 corresponds the first recess 12 of second sealing surface 11, the end of extension 9 is equipped with still thickening layer 13, the side of thickening layer 13 and first sealing surface 10 form second recess 14, when valve clapper 4 and valve seat 5 sealed fit first sealing surface 10 closes first recess 12, and the inner wall of valve seat 5 closes second recess 14.

[0026] The beneficial effects of such arrangement are as follows: the first recess and the second recess are provided on the valve seat and the valve clapper respectively, and the first recess and the second recess are used for medium flow during the closing of the valve clapper, so that a pressure buffer area is formed to reduce the pressure, and the utility model is suitable for high-temperature and high-pressure working conditions; the first recess and the second recess are oppositely arranged, so that a reverse force is formed on the medium during the closing of the valve clapper, and the opening and closing of the valve clapper is more labor-saving; and the first recess and the second recess can form a multi-stage sealing barrier to ensure good sealing performance.

[0027] Further arrangement, the valve seat 5 can be detachably arranged in the valve body 1, and a sealing compression ring 15 is further arranged between the valve seat 5 and the valve body 1.

[0028] The beneficial effects of such arrangement are as follows: the valve seat is detachably arranged, which is convenient for maintenance and replacement, and the sealing compression ring ensures good sealing performance between the valve seat and the valve body.

[0029] Further arrangement, the end surface of the valve seat 5 is further provided with an annular protrusion 16, and the annular protrusion 16 is pasted with the main part 8 when the valve clapper 4 and the valve seat 5 are sealed.

[0030] The beneficial effects of such arrangement are as follows: the annular protrusion forms an elastic sealing effect, and further improves the sealing performance of the valve seat and the valve clapper.

[0031] Further arrangement, the valve clapper 4 further includes a connecting part 17 used for connecting with the valve stem 2, the connecting part 17 extends outwardly and is provided with a diaphragm 18, the outer edge of the diaphragm 18 is bent and provided with a folded plate 19, the folded plate 19 extends to the gap between the valve cover 3 and the valve body 1, and the diaphragm 18 and the valve cover 3 form a sealed cavity 20 separated from the passageway. The diaphragm 18 is made of elastic material.

[0032] The beneficial effects of this design are as follows: the elastic diaphragm can deform with the movement of the valve disc, forming a dynamic sealing barrier, and can also prevent the medium in the channel from entering between the valve stem and the valve cover. The folding plate increases the contact area between the edge of the diaphragm and the valve body and valve cover, increasing the connection strength.

[0033] Furthermore, the outer wall of the extension 9 is a first conical surface 21 that tapers away from the valve stem 2, and the outer wall of the connecting part 17 is a second conical surface 22 that tapers towards the valve stem 2.

[0034] The beneficial effects of this design are as follows: the first conical surface is used to guide the valve disc into the valve seat, and the corresponding first and second sealing surfaces are also inclined surfaces, forming a better sealing effect; the second conical surface provides space for the diaphragm to deform.

[0035] Furthermore, a sealing assembly is provided between the valve stem 2 and the valve cover 3. The sealing assembly includes a first sealing ring 23, a second sealing ring 24, and a third sealing ring 25 distributed from top to bottom along the axial direction of the valve stem 2. The first sealing ring 23 and the third sealing ring 25 are both made of elastic material, while the second sealing ring 24 is made of hard metal.

[0036] The beneficial effects of this design are as follows: the three sealing layers greatly improve sealing performance; the sealing component is located between the valve stem and the valve cover; during valve operation, the valve stem needs to be frequently opened and closed; the second sealing ring and the valve stem use a hard metal seal; frequent friction between the valve stem and the second sealing ring will cause wear on the second sealing ring over long-term operation, such as... Figure 5 As shown, the first and third sealing rings located at the upper and lower ends of the second sealing ring deform and extend towards the wear position of the second sealing ring due to their elastic properties, thereby achieving the effect of compensating for the seal and extending the service life of the sealing assembly.

[0037] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-temperature and high-pressure angle gate valve, comprising a valve body (1), a valve stem (2), a valve cover (3), a valve disc (4), and a valve seat (5), wherein the valve body (1) has a channel, the valve disc (4) and the valve seat (5) are sealed together to divide the channel into an inlet channel (6) and an outlet channel (7), the valve cover (3) is disposed at one end of the valve body (1), and the valve stem (2) passes through the valve cover (3) and connects to the valve disc (4), characterized in that: The valve disc (4) includes a main body (8) and an extension (9). The main body (8) is used to fit against the end face of the valve seat (5). The extension (9) is used to extend into the inside of the valve seat (5). The outer wall of the extension (9) is provided with a first sealing surface (10). The inner wall of the valve seat (5) is provided with a second sealing surface (11) that seals with the first sealing surface (10). The valve seat (5) has a first groove (12) recessed at the side position corresponding to the second sealing surface (11). The end of the extension (9) is also provided with a thickening layer (13). The side of the thickening layer (13) forms a second groove (14) between the side of the thickening layer (13) and the first sealing surface (10). When the valve disc (4) seals with the valve seat (5), the first sealing surface (10) closes the first groove (12), and the inner wall of the valve seat (5) closes the second groove (14).

2. The high-temperature and high-pressure angle shut-off valve according to claim 1, characterized in that: The valve seat (5) is detachably disposed inside the valve body (1), and a sealing pressure ring (15) is also provided between the valve seat (5) and the valve body (1).

3. The high-temperature and high-pressure angle shut-off valve according to claim 1, characterized in that: The valve seat (5) is also provided with an annular protrusion (16) on its end face. When the valve disc (4) and the valve seat (5) are sealed together, the annular protrusion (16) fits into the main body (8).

4. The high-temperature and high-pressure angle shut-off valve according to claim 1, characterized in that: The valve disc (4) also includes a connecting part (17) for connecting to the valve stem (2). The connecting part (17) has a diaphragm (18) extending in all directions. The outer edge of the diaphragm (18) is bent with a folding plate (19). The folding plate (19) extends to the gap between the valve cover (3) and the valve body (1). A sealing cavity (20) separated from the channel is formed between the diaphragm (18) and the valve cover (3).

5. The high-temperature and high-pressure angle shut-off valve according to claim 4, characterized in that: The outer wall of the extension (9) is a first conical surface (21) that tapers away from the valve stem (2), and the outer wall of the connecting part (17) is a second conical surface (22) that tapers towards the valve stem (2).

6. The high-temperature and high-pressure angle shut-off valve according to claim 4, characterized in that: The diaphragm (18) is made of an elastic material.

7. The high-temperature and high-pressure angle shut-off valve according to claim 1, characterized in that: A sealing assembly is provided between the valve stem (2) and the valve cover (3). The sealing assembly includes a first sealing ring (23), a second sealing ring (24), and a third sealing ring (25) distributed from top to bottom along the axial direction of the valve stem (2).

8. The high-temperature and high-pressure angle shut-off valve according to claim 7, characterized in that: The first sealing ring (23) and the third sealing ring (25) are both made of elastic material, while the second sealing ring (24) is made of hard metal.

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