High-temperature and high-pressure anti-scouring stop valve

Abstract

A high-temperature and high-pressure anti-scouring stop valve comprises a valve body, a valve rod and a valve clack, a left flow channel and a right flow channel are arranged in the valve body in a non-collinear mode, a valve cage is arranged on a valve seat, a flow guide hole is formed in the side face of the valve cage, and a cavity for containing the valve clack when the valve is fully opened is formed in the top of the valve cage. A sealing pair is directly scoured and impacted, the conditions that a medium flows at a high speed on a sealing face, turbulence is conducted on the periphery of the sealing face, and no obvious pressure change exists are avoided, the valve cage design is adopted, the side face of the valve cage is provided with a flow guide hole with the same area as the valve seat, and the medium passes through the flow guide hole to change the 90-degree direction into transverse flow. And the valve clack sealing surface is located at the position, far away from the valve cage flow guide hole, of the upper end of the valve cage at the full-opening position, no obvious medium flows at the position of the valve clack sealing surface in the opening operation process of the valve, and the medium is prevented from scouring the valve clack sealing surface.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a high temperature and high pressure anti scouring stop valve. BACKGROUND

[0002] The existing stop valve has the problems of direct scouring and impact on the sealing pair when high temperature and high pressure medium passes through the sealing pair, which leads to serious cavitation of the valve and serious decrease of mechanical properties of high temperature materials. SUMMARY

[0003] In order to solve the technical defects in the prior art, the utility model provides a high temperature and high pressure anti scouring stop valve.

[0004] The utility model discloses a technical scheme that is: high temperature and high pressure anti scouring stop valve, including the valve body, valve rod and valve lobe, the left flow channel and right flow channel of non collinear of valve body, be equipped with the valve seat in the valve body, be equipped with the valve cage on the valve seat, the valve cage side face has the flow guide hole, and the medium changes 90 degree direction and becomes transverse flow through the flow guide hole, the top of valve cage is equipped with the chamber that contains the valve lobe when the valve is fully opened, the chamber is far away from the position of the flow guide hole of valve cage.

[0005] The valve seat is installed at the bottom of the valve cage, and the valve seat and the valve body are connected by using high-temperature-resistant sealing gaskets.

[0006] The top of the valve cage and the valve body are also provided with a sealing ring, and the sealing ring and the valve cage are wedge-surface matched.

[0007] The sealing ring is also provided with a sealing compression ring, which ensures the sealing between the valve cage and the valve body through the sealing compression ring and the sealing ring, and avoids the flow of medium from the periphery of the valve lobe to protect the valve lobe from being scoured.

[0008] The sealing compression ring, the valve body and the valve rod are also provided with a packing, and the upper end of the packing is provided with a packing compression sleeve, and the bottom of the packing is also provided with a packing pad.

[0009] The packing pad and the sealing compression ring are also provided with a butterfly spring group, which provides reliable pre-tightening force for the sealing ring between the valve cage and the valve body.

[0010] The flow guide hole and the valve seat are equal in area to ensure the stability of the flow rate at the valve seat position.

[0011] The sealing surface of the valve seat is stacked with wear-resistant and scour-resistant materials.

[0012] The valve body is integrally forged.

[0013] The utility model discloses a high temperature high pressure scouring resistance stop valve, including valve body, valve rod and valve clapper, the valve body in the non collinear left flow channel and right flow channel of setting, the valve body is equipped with the valve seat, be equipped with the valve cage on the valve seat, the valve cage side face has the flow guide hole, and the medium changes 90 DEG direction and becomes transverse flow through the flow guide hole, the top of valve cage is equipped with the chamber that holds valve clapper when valve is fully open, the position of the chamber away from the flow guide hole of valve cage, take the structural design of changing medium flow direction, avoid the direct scouring and impact of medium to sealing pair when passing through sealing pair, avoid the high -speed flow and the turbulence of surrounding and the situation such as no obvious pressure change on sealing surface happen. In this case, the sealing surface can be very well protected, greatly improve the service life of sealing pair, guarantee the long life cycle of valve, and adopt the valve cage design, and the valve cage side face has the flow guide hole with valve seat equal area, and the medium changes 90 DEG direction and becomes transverse flow through the flow guide hole, no longer scours valve clapper sealing surface, and valve clapper sealing surface is in the position of full opening and is located on the upper end of valve cage, and the position away from the flow guide hole of valve cage, actual valve is in the opening operation process, and there is no obvious medium flow at valve clapper sealing surface, avoid the scouring of medium to valve clapper sealing surface. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the utility model structure schematic drawing.

[0015] Figure 2 It is the utility model valve cage structure schematic drawing.

[0016] Among them, 1-valve body, 2-valve rod, 3-valve clapper, 4-valve seat, 5-valve cage, 6-sealing ring, 7-packing, 8-butterfly spring group, 41-sealing gasket, 51-flow guide hole, 61-sealing compression ring, 71-packing compression sleeve, 72-packing pad. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0018] The utility model discloses a high temperature and high pressure anti-erosion stop valve, including valve body 1, valve rod 2 and valve clapper 3, the left flow channel and right flow channel of non collinear arrangement are provided in the valve body 1, the valve seat 4 is equipped in the valve body 1, the valve cage 5 is equipped on the valve seat 4, the side of the valve cage 5 is opened the flow guide hole 51, and the medium changes 90 degree direction and becomes transverse flow through the flow guide hole 51, the top of the valve cage 5 is equipped with the chamber that accommodates the valve clapper 3 when the valve is fully opened, and the chamber is away from the flow guide hole 51 of the valve cage 5 position.

[0019] The valve seat 4 is installed at the bottom of the valve cage 5 and is away from the flow guide hole through which the medium flows, so that high-speed flushing fluid is avoided at the sealing surface.

[0020] The top of the valve cage 5 and the valve body 1 are further provided with a sealing ring 6, and the sealing ring 6 is wedge-surface matched with the valve cage 5.

[0021] The sealing pressure ring 61, the valve body 1 and the valve rod 2 are further provided with a packing 7, and the upper end of the packing is provided with a packing pressure sleeve 71, and the bottom of the packing is further provided with a packing pad 72.

[0022] The packing pad 72 and the sealing pressure ring 61 are further provided with a butterfly spring group 8, which provides reliable pre-tightening force for the sealing ring 6 between the valve cage 5 and the valve body 1.

[0023] The flow guide hole 51 and the valve seat 4 are equal in area to ensure stable flow rate at the valve seat 4 position.

[0024] The sealing surface of the valve seat 4 is cladded with wear-resistant and erosion-resistant material.

[0025] The valve body 1 is integrally forged to ensure the ability of the shell to withstand high temperature and high pressure.

[0026] The flow guiding gap between the valve cage and the valve body is calculated to ensure that there is no obvious change in the flow cross section at this position, so as to avoid the formation of turbulent flow, pressure change and erosion, and to ensure that the flow guiding hole will not be seriously eroded.

[0027] The high-pressure stop valve has large torque, and double-bearing transmission is adopted to reduce the torque and ensure flexible opening and closing.

[0028] Technical personnel should know that although the utility model has been described according to the above specific implementation mode, the utility model idea of the utility model is not limited to this utility model, and any modification using the utility model idea will be included in the patent protection range of the patent.

[0029] The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above-mentioned embodiments. Any technical solution under the idea of the utility model belongs to the protection scope of the utility model. It should be pointed out that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model should be considered as the protection scope of the utility model.

Claims

1. A high temperature and high pressure scouring check valve comprising a valve body (1), a valve stem (2) and a valve disc (3), characterized in that, The left flow channel and the right flow channel are arranged in the valve body (1) in a non-collinear manner, the valve body (1) is provided with a valve seat (4), the valve seat (4) is provided with a valve cage (5), the valve cage (5) is provided with a flow guide hole (51) on the side surface, the medium changes the direction by 90° to become a horizontal flow through the flow guide hole (51), the top of the valve cage (5) is provided with a chamber for accommodating the valve disc (3) when the valve is fully opened, and the chamber is away from the flow guide hole (51) of the valve cage (5).

2. The high temperature, high pressure, erosion control globe valve of claim 1, wherein, The valve seat (4) is installed at the bottom of the valve cage (5), and the valve seat (4) and the valve body (1) are connected by using a high-temperature-resistant sealing gasket (41).

3. The high temperature, high pressure, erosion control globe valve of claim 1, wherein, The top of the valve cage (5) and the valve body (1) are further provided with a sealing ring (6), and the sealing ring (6) is wedge-shaped with the valve cage (5).

4. The high temperature, high pressure, erosion control globe valve of claim 3, wherein, The sealing ring (6) is further provided with a sealing compression ring (61), which ensures the sealing between the valve cage (5) and the valve body (1) with the sealing ring (6), so as to avoid the flow of the medium from the periphery of the valve disc (3) to protect the valve disc (3) from being washed.

5. The high temperature, high pressure, erosion control globe valve of claim 4, wherein, The sealing compression ring (61), the valve body (1) and the valve stem (2) are further provided with a packing (7), the upper end of the packing is provided with a packing compression sleeve (71), and the bottom of the packing is further provided with a packing pad (72).

6. The high temperature, high pressure, erosion control globe valve of claim 5, wherein, The packing pad (72) and the sealing compression ring (61) are further provided with a butterfly spring group (8), which provides reliable pre-tightening force for the sealing ring (6) between the valve cage (5) and the valve body (1).

7. The high temperature, high pressure, erosion control globe valve of claim 1, wherein, The flow guide hole (51) and the valve seat (4) are arranged in equal area to ensure the stability of the flow rate of the valve seat (4).

8. The high temperature, high pressure, erosion control globe valve of claim 1, wherein, The sealing surface of the valve seat (4) is stacked with wear-resistant and wash-resistant materials.

9. The high temperature, high pressure, erosion control globe valve of claim 1, wherein, The valve body (1) is integrally forged.

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