Ash and slag discharge ball valve

Abstract

The application discloses a ball valve for discharging ash and slag, which comprises a valve body with a valve cavity, a medium inflow channel and a medium outflow channel communicated with the valve cavity; a ball body is arranged in the valve cavity and is provided with a first through hole; an upstream valve seat and a downstream valve seat are respectively arranged between two sides of the ball body and a cavity wall of the valve cavity; the upstream valve seat is provided with a second through hole, one end of which is communicated with the medium inflow channel and the other end of which corresponds to the first through hole; the downstream valve seat is provided with a third through hole, one end of which is communicated with the medium outflow channel and the other end of which corresponds to the first through hole; the medium inflow channel, the second through hole, the first through hole, the third through hole and the medium outflow channel cooperatively form a medium flow channel; one end of a valve rod is connected with the ball body and the other end of the valve rod extends out of the valve body through a valve rod channel on the valve body; the ball body is rotatably connected with the upstream valve seat and the downstream valve seat respectively, and the valve rod is used for driving the ball body to rotate so as to open or close the medium flow channel; a guide ash groove is arranged on the downstream valve seat and is communicated with the valve cavity and the medium outflow channel.

Description

Technical Field

[0001] This invention belongs to the field of control ball valves, and particularly relates to a ball valve for discharging ash and slag. Background Technology

[0002] Currently, many chemical process media are not very clean, containing dust, powder, slag, and other powdery or solid particles. During valve opening and closing, these powdery or solid particles will accumulate in the valve cavity, and if they accumulate to a certain extent, they will cause the valve to jam or become difficult to open and close.

[0003] Valves used in applications where the medium contains dust, powder, slag, or other powdery or particulate matter are generally either double-seat ball valves or single-seat ball valves. Double-seat ball valves offer good sealing and even force distribution, but dust or particulate matter cannot be discharged from the valve cavity, and its accumulation can cause the valve to jam or become difficult to open. Single-seat ball valves can smoothly discharge dust or particulate matter from the valve cavity, but due to the single seat, the ball experiences uneven force distribution, resulting in a low leakage rating. Furthermore, the unidirectional force causes one-way wear on the ball and stem, leading to a shorter valve lifespan. Summary of the Invention

[0004] The purpose of this invention is to provide a ball valve for discharging ash and slag to solve the technical problem in the prior art where dust or solid particulate media easily accumulate in the valve cavity of a double-seat ball valve, causing the valve to jam.

[0005] The technical solution of this invention is as follows:

[0006] A ball valve for discharging ash and slag, comprising:

[0007] The valve body has a valve cavity and a medium inflow channel and a medium outflow channel communicating with the valve cavity;

[0008] A sphere is disposed within the valve cavity, and the sphere is provided with a first through hole;

[0009] An upstream valve seat and a downstream valve seat are respectively disposed on both sides of the ball and between the valve cavity wall; the upstream valve seat has a second through hole, one end of which is connected to the medium inflow channel and the other end of which corresponds to the first through hole; the downstream valve seat has a third through hole, one end of which is connected to the medium outflow channel and the other end of which corresponds to the first through hole; the medium inflow channel, the second through hole, the first through hole, the third through hole, and the medium outflow channel cooperate to form a medium flow channel;

[0010] A valve stem is provided on the valve body, which has a valve stem channel communicating with the valve cavity. One end of the valve stem is connected to the ball, and the other end extends out of the valve body through the valve stem channel. The ball is rotatably connected to the upstream valve seat and the downstream valve seat respectively. The valve stem is used to drive the ball to rotate to open or close the medium flow channel.

[0011] The downstream valve seat is provided with a dust guide groove, which connects the valve cavity and the medium outflow channel.

[0012] Preferably, the downstream valve seat includes a downstream valve seat body and a valve seat support body. The third through hole is provided in the valve seat support body. The downstream valve seat body is connected to the ball and the valve seat support body respectively. The outer side wall of the valve seat support body is connected to the valve cavity wall. Part of the outer side wall of the valve seat support body is concave and cooperates with the valve cavity wall to form the dust guide groove.

[0013] Preferably, it includes a plurality of ash guiding grooves, which are evenly distributed around the axis of the third through hole.

[0014] Preferably, the valve body is provided with a purge hole communicating with the valve cavity, and a purge hole plug is installed in the purge hole.

[0015] Preferably, at least one annular sealing structure is provided between the upstream valve seat and the valve cavity wall, and between the downstream valve seat body and the valve seat support, wherein the upstream valve seat and the downstream valve seat are the first sealed elements, and the valve cavity wall and the valve seat support are the second sealed elements;

[0016] The annular sealing structure includes a butterfly spring and two sealing rings. The two sealing rings are respectively connected to the first sealed component and the second sealed component to achieve a sealed connection between them. The butterfly spring is wrapped around the periphery of the second through hole, and the two ends of the butterfly spring in the axial direction are respectively connected to the two sealing rings.

[0017] Preferably, a sealing gasket is provided between the butterfly spring and the sealing ring.

[0018] Preferably, the surface of the butterfly spring facing the sphere is connected to the corresponding sealing pad near its outer wall, and the surface of the butterfly spring away from the sphere is connected to the corresponding sealing pad near its inner wall.

[0019] Preferably, the surfaces of the first sealed member and the second sealed member cooperate to form a spring cavity for accommodating the annular sealing structure;

[0020] The spring cavity includes a main chamber and two side chambers that are interconnected. The butterfly spring is disposed in the main chamber. The sealing ring and the sealing gasket located on the same side of the butterfly spring are housed in the same side chamber. The sealing ring is pressed into the side chamber by the corresponding sealing gasket. The sealing gasket extends out of the side chamber and is connected to the butterfly spring.

[0021] Preferably, the valve body includes an upstream valve body and a downstream valve body, the upstream valve body and the downstream valve body are fixedly connected and internally configured to form a valve cavity, the upstream valve seat is connected to the upstream valve body, and the downstream valve seat is connected to the downstream valve body; the valve stem channel is provided on the upstream valve body.

[0022] Preferably, it further includes a lower valve stem, one end of which is rotatably connected to the ball, and its rotation axis is on the same straight line as the rotation axis of the ball, and the other end is fixedly connected to the valve body.

[0023] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art:

[0024] (1) The ash and slag discharge ball valve provided by the present invention is a double-seat ball valve, and a ash guide groove is provided on the downstream valve seat to connect the valve cavity and the medium flow channel, which can smoothly discharge the dust or solid particulate medium accumulated in the valve cavity to the downstream flow point, thereby solving the problem that the double-seat ball valve is prone to accumulating dust or solid particulate medium in the valve cavity and causing the valve to jam.

[0025] (2) In one embodiment of the present invention, the ash and slag discharge ball valve is provided with a purge hole on the valve body that connects to the valve cavity, and a purge hole plug is installed in the purge hole. When the valve is closed, the purge hole plug can be opened to purge the powder or solid particulate media accumulated in the valve cavity with external high-pressure gas, so that it is discharged from the media outflow channel, thereby cleaning the valve cavity and preventing the valve from jamming or having difficulty opening and closing.

[0026] (3) The ash and slag discharge ball valve provided in one embodiment of the present invention is provided with an annular sealing structure with a butterfly spring on both the upstream valve seat and the downstream valve seat. The butterfly spring at the upstream valve seat and the butterfly spring at the downstream valve seat have the same output force, so that the ball and the valve stem are subjected to uniform force in both directions, thereby improving the sealing level and service life of the valve. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention.

[0028] Figure 1 This is a schematic diagram of the structure of a ball valve for discharging ash and slag according to the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a valve seat support body according to the present invention;

[0030] Figure 3 This is a schematic diagram of an annular sealing structure according to the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a ball valve for discharging ash and slag with a purge hole according to the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1: Upstream valve body; 2: Downstream valve body; 3: Upstream valve seat; 4: Downstream valve seat body; 5: Valve seat support; 6: Ball; 7: Valve stem; 8: Lower valve stem; 9: Packing box; 10: Bracket; 11: Ash guide groove; 12: Purge hole plug; 13: Butterfly spring; 14: Sealing gasket; 15: Sealing ring. Detailed Implementation

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0035] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0036] Example 1

[0037] See Figures 1 to 4This embodiment provides a ball valve for discharging ash and slag, including: a valve body, a ball 6, an upstream valve seat 3, a downstream valve seat, and a valve stem 7. The valve body has a valve cavity and a medium inflow channel and a medium outflow channel communicating with the valve cavity. The ball 6 is disposed within the valve cavity and has a first through hole. The upstream valve seat 3 and the downstream valve seat are respectively disposed on both sides of the ball 6 and between the valve cavity wall. The upstream valve seat 3 has a second through hole, one end of which communicates with the medium inflow channel, and the other end corresponds to the first through hole. The downstream valve seat has a third through hole, one end of which communicates with the medium outflow channel, and the other end corresponds to the first through hole. The medium inflow channel, the second through hole, the first through hole, the third through hole, and the medium outflow channel cooperate to form a medium flow channel. The valve body has a valve stem 7 channel communicating with the valve cavity, one end of the valve stem 7 is connected to the ball 6, and the other end extends out of the valve body through the valve stem 7 channel. The ball 6 is rotatably connected to the upstream valve seat 3 and the downstream valve seat respectively, and the valve stem 7 is used to drive the ball 6 to rotate to open or close the medium flow channel.

[0038] The downstream valve seat is equipped with a dust guide groove 11, which connects the valve cavity and the medium outflow channel. The dust guide groove 11 can smoothly discharge the dust or solid particulate media accumulated in the valve cavity to the downstream flow point, thereby solving the problem of dust or solid particulate media easily accumulating in the valve cavity of the double-seat ball valve and causing the valve to jam.

[0039] The structure of this embodiment will now be described.

[0040] The ash and slag discharge ball valve provided in this embodiment also includes a packing box 9 and a bracket 10. The valve body includes an upstream valve body 1 and a downstream valve body 2. The upstream valve body 1 and the downstream valve body 2 are fixedly connected and internally form a valve cavity. The upstream valve seat 3 is connected to the upstream valve body 1, and the downstream valve seat is connected to the downstream valve body 2. The valve stem 7 channel is provided on the upstream valve body 1. The packing box 9 is connected to the upstream valve body 1, and the bracket 10 is connected to the packing box 9. The valve stem 7 extends out of the valve body through the valve stem 7 channel and then passes through the packing box 9 and the bracket 10 in sequence before extending out. After the valve stem 7 extends out, a handle that is easy to rotate can be installed to facilitate the opening or closing of the ash and slag discharge ball valve. Alternatively, the valve stem 7 can be connected to a pneumatic or electric actuator such as a cylinder to realize the pneumatic or electric control of the ash and slag discharge ball valve.

[0041] This embodiment may further include a lower valve stem 8, with a lower valve stem 8 channel provided on the upstream valve body 1. One end of the lower valve stem 8 is rotatably connected to the ball 6, and its rotation axis is on the same straight line as the rotation axis of the ball 6. The other end is housed in the lower valve stem 8 channel through the valve cavity and is fixedly connected to the upstream valve body 1, thereby stabilizing the rotation of the ball 6.

[0042] like Figure 1 The ash and slag discharge ball valve provided in this embodiment adopts a fixed ball valve structure. If it is replaced with a floating ball valve structure, the purpose of this invention can also be achieved while keeping everything else unchanged.

[0043] In this embodiment, the downstream valve seat includes a downstream valve seat body 4 and a valve seat support 5. The third through hole and the ash guide groove 11 are both disposed on the valve seat support 5. The outer wall of the valve seat support 5 is connected to the valve cavity wall. A portion of the outer wall of the valve seat support 5 is recessed, cooperating with the valve cavity wall to form the ash guide groove 11. Although this embodiment includes a downstream valve seat body 4 and a valve seat support 5, in other embodiments, the downstream valve seat may be a single unit or have other configuration forms; this is not limited here.

[0044] One or more ash guide grooves 11 can be provided. When there are multiple ash guide grooves 11, they can be further evenly distributed around the axis of the third through hole. In this embodiment, three ash guide grooves 11 are evenly distributed around the axis of the third through hole, but in other embodiments, the number and arrangement of the ash guide grooves 11 are not limited.

[0045] An annular sealing structure is provided at least once between the upstream valve seat 3 and the valve cavity wall, and between the downstream valve seat body 4 and the valve seat support 5. For ease of description, the upstream valve seat 3 and the downstream valve seat are collectively referred to as the first sealed element, and the valve cavity wall and the valve seat support 5 are collectively referred to as the second sealed element.

[0046] The annular sealing structure includes a butterfly spring 13 and two sealing rings 15. Each sealing ring 15 is connected to both the first and second sealed components, achieving a sealed connection between them. The butterfly spring 13 is wound around the periphery of the second through hole, and its two axial ends are connected to the two sealing rings 15 respectively.

[0047] Furthermore, a sealing gasket 14 can be provided between the butterfly spring 13 and the sealing ring 15. The surface of the butterfly spring 13 facing the ball 6 is in contact with the corresponding sealing gasket 14 near its outer sidewall, and then the sealing gasket 14 is connected to the sealing ring 15 on that side; the surface of the butterfly spring 13 away from the ball 6 is in contact with the corresponding sealing gasket 14 near its inner sidewall, and then the sealing gasket 14 is connected to the sealing ring 15 on that side.

[0048] The surfaces of both the first and second sealed elements at the annular sealing structure are stepped, and their surfaces mate to form a spring cavity for accommodating the annular sealing structure. The spring cavity includes a main chamber primarily for housing the butterfly spring 13 and two side chambers primarily for accommodating the sealing ring 15 and the sealing gasket 14. The sealing ring 15 and the sealing gasket 14, located on the same side of the butterfly spring 13, are housed within the same side chamber. The butterfly spring 13 abuts against two sealing gaskets 14 on both sides, and then the two sealing gaskets 14 press the two sealing rings 15 against the bottom inner wall of the side chamber. That is, the entire sealing ring 15 is pressed into the side chamber by the corresponding sealing gasket 14, with a portion of the sealing gasket 14 extending out of the side chamber and connecting to the butterfly spring 13.

[0049] This embodiment employs a dual-seat structure, with the butterfly spring 13 at the upstream valve seat 3 and the butterfly spring 13 at the downstream valve seat having the same output force. This ensures uniform bidirectional force on the ball 6 and valve stem 7, improving the valve's sealing level and service life. Furthermore, it utilizes a fully protected spring cavity structure, with sealing rings 15 and sealing pads 14 on both sides of the butterfly spring 13 (see...). Figure 3 The spring force acts on the sealing gasket 14 to press the sealing ring 15, thereby preventing powdery or solid particulate media from entering the spring cavity and causing the butterfly spring 13 to fail, resulting in valve leakage.

[0050] The cylinder or handle rotates the valve stem 7 and ball 6, disconnecting the first through hole from the second and third through holes, thus closing the valve; the cylinder or handle also rotates the valve stem 7 and ball 6, connecting the first through hole to the second and third through holes, thus opening the valve. During the valve closing and opening process (when the valve is half-open or partially open), the medium pressure in the medium flow channel forces the residual dust or solid particles in the valve cavity through the dust guide groove 11 at the downstream valve seat (see...). Figure 2 It blows into the medium outflow channel, thereby preventing the accumulation of powdery or solid particulate media in the valve cavity.

[0051] This embodiment uses a hard-seal ball valve structure. If it is replaced with a soft-seal ball valve structure while keeping everything else unchanged, it can also solve the problem of dust or solid particulate media accumulating in the valve cavity of a double-seat ball valve, causing the valve to jam.

[0052] Example 2

[0053] See Figure 4 This embodiment adds a purge hole and a purge hole plug 13 to the embodiment 1.

[0054] The purge hole is located on the valve body, connecting the valve cavity to the outside. A purge hole plug 13 is installed inside the purge hole. In this embodiment, purge holes can be opened on both sides of the middle part of the valve cavity of the valve body. Of course, in other embodiments, the number and location of the purge holes can be selected according to the actual situation, and there is no limitation here.

[0055] When the medium pressure in the medium flow channel during valve closing and opening is insufficient to clean the dust or solid particles remaining in the valve cavity, the purge port plug 13 can be opened when the valve is closed (i.e., there is no medium pressure in the valve cavity) to purge the accumulated dust or solid particles in the valve cavity with external high-pressure gas. The ash will then be discharged through the guide groove 11 at the downstream valve seat (see...). Figure 2 This allows the fluid to flow out through the medium channel, thereby further cleaning the valve cavity and preventing the valve from jamming or becoming difficult to open and close.

[0056] The ash and slag discharge ball valve provided by this invention adopts a double-seat structure, resulting in uniform force distribution, good valve sealing, and a high leakage level. The ball 6 and valve stem 7 are subjected to uniform force, resulting in minimal wear and a long valve life. This invention innovatively designs a valve seat support 5 and an ash guide groove 11 at the downstream valve seat. The ash guide groove 11 allows accumulated dust or solid particulate matter in the valve cavity to be smoothly discharged from the media outlet channel. Furthermore, purge holes are opened on both sides of the valve cavity in the middle of the valve body. If necessary, when the valve is closed (i.e., there is no pressure in the valve cavity), external high-pressure gas can be used to purge accumulated dust or solid particulate matter in the valve cavity, causing it to be discharged into the media outlet channel. The ash and slag discharge ball valve provided by this invention employs a fully protected spring cavity structure to prevent the accumulation of powder or solid particulate matter in the spring cavity, which could lead to spring failure and valve leakage.

[0057] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A ball valve for the discharge of ash and slag, characterized in that, The utility model relates to a valve, comprising: a valve body having a valve cavity, a medium inflow channel and a medium outflow channel; a ball provided in the valve cavity, the ball being provided with a first through hole; an upstream valve seat and a downstream valve seat provided between the ball and the valve cavity wall respectively, the upstream valve seat being provided with a second through hole, one end of the second through hole being connected to the medium inflow channel and the other end corresponding to the first through hole, the downstream valve seat being provided with a third through hole, one end of the third through hole being connected to the medium outflow channel and the other end corresponding to the first through hole, the medium inflow channel, the second through hole, the first through hole, the third through hole and the medium outflow channel cooperating to form a medium flow channel; a valve rod provided on the valve body and connected to the valve cavity, one end of the valve rod being connected to the ball and the other end extending out of the valve body through the valve rod channel, the ball being rotatably connected to the upstream valve seat and the downstream valve seat respectively, the valve rod being used to drive the ball to rotate to open or close the medium flow channel; the downstream valve seat being provided with a guide groove, the guide groove being connected to the valve cavity and the medium outflow channel; the downstream valve seat comprising a downstream valve seat body and a valve seat support, the third through hole being provided in the valve seat support, the downstream valve seat body being connected to the ball and the valve seat support respectively, the valve seat support outer wall being connected to the valve cavity wall, the valve seat support part of the outer wall being concave, and the valve cavity wall cooperating to form the guide groove; the valve body being provided with a purge hole connected to the valve cavity, the purge hole being provided with a plug; 2. The ball valve for discharging ash and slag according to claim 1, characterized by a plurality of guide grooves being evenly distributed around the axis of the third through hole; 3. The ball valve for discharging ash and slag according to claim 1, characterized by at least one of the upstream valve seat and the valve cavity wall and the downstream valve seat body and the valve seat support being provided with an annular sealing structure, wherein the upstream valve seat and the downstream valve seat are first sealed members, and the valve cavity wall and the valve seat support are second sealed members; the annular sealing structure comprising a butterfly spring and two sealing rings, the two sealing rings being connected to the first sealed member and the second sealed member respectively to realize sealing connection, the butterfly spring being provided around the periphery of the second through hole, and the two ends of the butterfly spring being connected to the two sealing rings respectively; 4. The ball valve for discharging ash and slag according to claim 3, characterized by a sealing gasket being provided between the butterfly spring and the sealing ring; 5. The ball valve for discharging ash and slag according to claim 4, characterized by the surface of the butterfly spring facing the ball being connected to the corresponding sealing gasket near the outer wall, and the surface of the butterfly spring away from the ball being connected to the corresponding sealing gasket near the inner wall; 6. The ball valve for discharging ash and slag according to claim 5, wherein the surface of the first sealed member and the surface of the second sealed member cooperating to form a spring cavity for accommodating the annular sealing structure; The spring cavity comprises a main chamber and two side chambers which are interconnected, the butterfly spring is arranged in the main chamber, the sealing ring and the sealing pad on the same side of the butterfly spring are arranged in the same side chamber, the sealing ring is pressed in the side chamber corresponding to the sealing pad, and the sealing pad partially extends out of the side chamber and is connected with the butterfly spring.

7. The ball valve for discharging ash and slag according to claim 1, wherein The valve body comprises an upstream valve body and a downstream valve body which are fixedly connected and internally matched to form a valve cavity, the upstream valve seat is connected with the upstream valve body, and the downstream valve seat is connected with the downstream valve body; and the valve rod channel is arranged on the upstream valve body.

8. The ball valve for discharging ash and slag according to claim 1, wherein The lower valve rod is rotatably connected to one end of the ball body, and the rotation axis of the lower valve rod is arranged on the same line as the rotation axis of the ball body, and the other end of the lower valve rod is fixedly connected with the valve body.

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