A quick-opening low-wear ash discharge valve

Abstract

The present invention discloses a quick-opening low-wear ash discharge valve, comprising a valve body and a valve core, the valve body comprising an outer shell and a piston cylinder, the outer shell is a rotary structure with openings at both ends, the middle part of the inner cavity of the outer shell is an arc-shaped cavity protruding outward, wear-resistant components are arranged at the upper and lower end openings of the outer shell, the wear-resistant components comprise an upper sleeve and a lower sleeve respectively sleeved on the upper and lower end openings, the upper end of the piston cylinder is open, the piston cylinder is coaxially arranged with the outer shell, the piston cylinder is fixedly installed inside the arc-shaped cavity of the outer shell, a material passing channel is left between the outer wall of the piston cylinder of the piston cylinder and the inner wall of the outer shell, a valve core is axially slidably installed in the piston cylinder, the outer diameter of the upper end of the valve core is equal to the inner diameter of the upper end opening of the outer shell, the quick-opening low-wear ash discharge valve can effectively reduce the wear of the internal flow medium on the sealing surface through structural design, and improve the service life of the valve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a quick-opening low-wear ash discharge valve. Background Art

[0002] In the production process, the ash unloading valve is a relatively commonly used mechanical equipment. Since the internal medium is fine high-temperature particles, when the medium flows, it causes great wear to the inner wall of the valve body and the outer wall of the valve core. Most of the existing ash unloading valves use ball valves or butterfly valves. When the valve is opened, the medium flows, and the contact sealing surface between the valve body and the valve core is continuously worn, causing the sealing performance of the sealing surface to gradually decrease, seriously affecting the service life of the ash unloading valve. In severe cases, the valve needs to be replaced within one month, which causes a decrease in the production rhythm and an increase in maintenance costs. Therefore, it is necessary to develop a new type of valve that can avoid the wear of the internal medium on the sealing surface inside the valve and extend the service life of the valve. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a quick-opening low-wear ash discharge valve, which, through structural design, effectively reduces the wear of the internal flow medium on the sealing surface and increases the service life of the valve.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fast-opening low-wear ash discharge valve, comprising a valve body and a valve core, the valve body comprising an outer shell and a piston cylinder, the outer shell is a rotary structure with openings at both ends, the middle part of the inner cavity of the outer shell is an arc-shaped cavity protruding outward, wear-resistant components are arranged at the upper and lower end openings of the outer shell, the wear-resistant components comprise an upper sleeve and a lower sleeve respectively sleeved on the upper and lower end openings, the upper end of the piston cylinder is open, the piston cylinder is coaxially arranged with the outer shell, the piston cylinder is fixedly installed inside the arc-shaped cavity of the outer shell, a material passing channel is left between the outer wall of the piston cylinder of the piston cylinder and the inner wall of the outer shell, a valve core is axially slidably installed in the piston cylinder, the outer diameter of the upper end of the valve core is equal to the inner diameter of the upper end opening of the outer shell, when the valve core slides to the highest position, the upper end of the valve core is inserted into the upper end opening of the outer shell, and when the valve core slides to the lowest position, the upper end surface of the valve core is inside the arc-shaped cavity of the outer shell and a material passing channel is left between the upper end opening.

[0005] As a preferred technical solution of the present invention, wear-resistant components are provided at the upper and lower end openings of the shell, and the wear-resistant components include an upper sleeve and a lower sleeve respectively sleeved on the upper and lower end openings, and the valve core includes a piston and a receiving plate, and the piston is slidably installed with the piston cylinder, and the receiving plate is fixedly installed on the top of the piston, and the outer diameter of the receiving plate is equal to the inner diameter of the upper sleeve. When the piston slides to the highest position, the receiving plate is inserted into the upper sleeve, and the outer circumferential wall of the receiving plate is gap-matched with the inner wall of the upper sleeve;

[0006] By adding a wear-resistant component at the opening, the wear resistance of the opening position is increased, and by setting a receiving plate at the top of the valve core, the erosion of the upper end surface of the piston in the initial stage of medium flow is avoided. The receiving plate and the piston are designed separately, and only the receiving plate is made of wear-resistant material, which helps to reduce costs.

[0007] As a preferred technical solution of the present invention, a guide ring is fixedly arranged horizontally on the inner wall of the upper sleeve, the upper surface of the guide ring is an inclined surface with the center of the circle tilted downward, the lower end of the inner wall of the upper sleeve is provided with an oblique angle, a sealing ring is provided at the upper end of the outer circumferential wall of the valve core, and a sealing surface is provided on the upper surface of the sealing ring with the same oblique angle as the bottom end of the upper sleeve, when the piston slides to the highest position, the receiving plate is inserted into the interior of the upper sleeve, the upper end of the side wall of the receiving plate is below the guide ring, and the sealing surface of the sealing ring contacts and seals with the oblique surface of the lower end of the upper sleeve;

[0008] Through the guide surface of the guide ring, the flow direction of the powder near the inner wall of the opening is changed, so that the powder can gradually accumulate on the surface of the receiving plate, avoiding the powder falling directly to scour the outer circumferential wall of the valve core;

[0009] At the same time, a sealing ring is added. When closing, the sealing surface of the sealing ring contacts and seals with the chamfered surface of the lower end of the upper sleeve, which plays a secondary sealing effect. At the same time, since the medium is piled up into a hill in the carrier plate, when the medium falls, it falls along the slope of the hill, not in a straight line, and will not cause erosion to the sealing ring, effectively avoiding wear of the sealing ring. At the same time, after the valve is closed, the guide ring also blocks the gap between the upper sleeve and the side wall of the carrier plate to prevent the medium from entering the gap and avoiding scratches on the outer wall or the inner wall due to the internal mixed medium when the two move relative to each other, thereby ensuring the sealing performance of the sealing surface. Moreover, when the medium is in a normal circulation state, the guide ring can also protect the inner wall of the upper sleeve below it to prevent the medium from eroding the sealing surface.

[0010] As a preferred technical solution of the present invention, the lower end of the upper sleeve is flush with the upper opening of the arc-shaped cavity, the upper end of the lower sleeve is higher than the lower opening of the arc-shaped cavity, and the height of the upper end of the lower sleeve above the lower opening of the arc-shaped cavity is 0.1-0.3 times the total height of the arc-shaped cavity;

[0011] Since the lower sleeve protrudes from the lower end opening of the arc-shaped cavity, part of the medium will be stored in the groove between the lower sleeve and the arc-shaped cavity, forming a triangular protective layer to protect the inner wall of the arc-shaped cavity at the accumulation position. This position is exactly the position where the inside of the arc-shaped cavity is most severely eroded. Therefore, after adding the triangular protective layer, the wear of the inner cavity of the shell is effectively reduced, and the service life of the valve is effectively increased.

[0012] As a preferred technical solution of the present invention, a support frame for connection and fixing is provided between the piston cylinder and the shell, and a lubricating oil filling channel connecting the inner cavity of the piston cylinder and the outside of the shell is provided in the support frame, and a sealing plug is installed in cooperation with the opening of the lubricating oil filling channel outside;

[0013] Lubricating oil is added to the gap between the piston and the piston cylinder through the lubricating oil filling channel to ensure smooth and fast sliding between the two to avoid jamming.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present fast-opening low-wear ash discharge valve adopts a piston as the valve core, and in actual application, it is driven by pneumatic components to realize rapid movement of the piston, thereby realizing rapid opening and closing of the valve, and at the same time utilizing the repose angle effect of the medium to form a hill-like accumulation on the top of the valve core, and the subsequent medium directly flushes the accumulated medium rather than the valve core, thereby effectively reducing the wear of the valve core, and at the same time, when the medium flows, it flows in an oblique outward direction, and will not wear the outer circumferential surface of the valve core, and the valve core utilizes the outer circumferential surface for sealing, that is, the sealing surface will not be flushed by the medium, thereby ensuring that the valve still has good sealing performance after long-term use, and at the same time, with the arc-shaped cavity, the medium flows directly from the periphery of the valve core, and will not directly flush with the inner wall of the shell, thereby reducing the wear on the inner wall of the shell and effectively improving the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a cross-sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the valve of the present invention when it is open;

[0018] Figure 4 This is a schematic diagram of the valve of the present invention when it is closed.

[0019] Figure 5 This is an enlarged view of point A of the present invention.

[0020] In the figure: 1 valve body, 101 shell, 102 piston cylinder, 103 lubricating oil filling channel, 2 wear-resistant component, 201 upper sleeve, 202 lower sleeve, 203 guide ring, 3 valve core, 301 piston, 302 receiving plate, 303 sealing ring, 4 sealing plug. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-5 The present invention provides a technical solution: a fast-opening low-wear ash discharge valve, comprising a valve body 1 and a valve core 3, the valve body 1 comprising an outer shell 101 and a piston cylinder 102, the outer shell 101 is a rotary structure with upper and lower ends opening, the middle part of the inner cavity of the outer shell 101 is an arc-shaped cavity protruding outward, the upper and lower end openings of the outer shell 101 are both provided with a wear-resistant component 2, the wear-resistant component 2 comprises an upper sleeve 201 and a lower sleeve 202 respectively sleeved at the upper and lower end openings, the upper end of the piston cylinder 102 is open, and the piston cylinder 102 is coaxially arranged with the outer shell 101 The piston cylinder 102 is fixedly installed inside the arc-shaped cavity of the outer shell 101, and a material passing channel is left between the outer wall of the piston cylinder 102 and the inner wall of the outer shell 101. The valve core 3 is axially slidably installed in the piston cylinder 102, and the outer diameter of the upper end of the valve core 3 is equal to the inner diameter of the upper end opening of the outer shell 101. When the valve core 3 slides to the highest position, the upper end of the valve core 3 is inserted into the upper end opening of the outer shell 101. When the valve core 3 slides to the lowest position, the upper end surface of the valve core 3 is inside the arc-shaped cavity of the outer shell and a material passing channel is left between it and the upper end opening.

[0023] The upper and lower openings of the housing 101 are both provided with a wear-resistant component 2, the wear-resistant component 2 comprises an upper sleeve 201 and a lower sleeve 202 respectively sleeved on the upper and lower openings, the valve core 3 comprises a piston 301 and a receiving plate 302, the piston 301 is slidably mounted with the piston cylinder 102, the receiving plate 302 is fixedly mounted on the top of the piston 301, the outer diameter of the receiving plate 302 is equal to the inner diameter of the upper sleeve 201, when the piston 301 slides to the highest position, the receiving plate 302 is inserted into the upper sleeve 201, and the outer circumferential wall of the receiving plate 302 is gap-matched with the inner wall of the upper sleeve 201;

[0024] By adding a wear-resistant component 2 at the opening, the wear resistance of the opening position is increased, and by setting a receiving plate 302 at the top of the valve core 3, the erosion of the upper end surface of the piston 301 in the initial stage of medium flow is avoided. The receiving plate 302 and the piston 301 are designed separately, and only the receiving plate 302 is made of wear-resistant material, which helps to reduce costs.

[0025] The guide ring 203 is fixedly arranged horizontally on the inner wall of the upper sleeve 201. The upper surface of the guide ring 203 is an inclined surface with the center of the circle tilted downward. The lower end of the inner wall of the upper sleeve 201 is provided with an oblique angle. The upper end of the outer circumferential wall of the valve core 3 is provided with a sealing ring 303. The upper surface of the sealing ring 303 is provided with a sealing surface with the same oblique angle as the bottom end of the upper sleeve 201. When the piston 301 slides to the highest position, the receiving plate 302 is inserted into the upper sleeve 201. The upper end of the side wall of the receiving plate 302 is below the guide ring 203, and the sealing surface of the sealing ring 303 contacts and seals with the oblique surface of the lower end of the upper sleeve 201.

[0026] The guide surface of the guide ring 203 changes the flow direction of the powder near the inner wall of the opening, so that the powder can gradually accumulate on the surface of the receiving plate 302, thereby preventing the powder from falling directly and scouring the outer circumferential wall of the valve core 3;

[0027] At the same time, a sealing ring 303 is added. When the valve is closed, the sealing surface of the sealing ring 303 contacts and seals with the chamfered surface at the lower end of the upper sleeve 201, which has a secondary sealing effect. At the same time, since the medium is piled up into a small hill in the carrier plate 302, when the medium falls, it falls along the slope of the small hill, not in a straight line, and will not cause erosion to the sealing ring 303, thereby effectively avoiding wear of the sealing ring 303. At the same time, after the valve is closed, the guide ring 203 also blocks the gap between the upper sleeve 201 and the side wall of the carrier plate 302 to avoid the medium from entering the gap and avoiding scratches on the outer wall or the inner wall due to the internal mixed medium when the two move relative to each other, thereby ensuring the sealing performance of the sealing surface. Moreover, when the medium is in a normal circulation state, the guide ring 203 can also protect the inner wall of the upper sleeve 201 below it to avoid the medium from eroding the sealing surface.

[0028] The lower end of the upper sleeve 201 is flush with the upper opening of the arc-shaped cavity, the upper end of the lower sleeve 202 is higher than the lower opening of the arc-shaped cavity, and the height of the upper end of the lower sleeve 202 above the lower opening of the arc-shaped cavity is 0.1-0.3 times the total height of the arc-shaped cavity;

[0029] Since the lower sleeve 202 protrudes from the lower end opening of the arc-shaped cavity, part of the medium will be stored in the groove between the lower sleeve 202 and the arc-shaped cavity, forming a triangular protective layer to protect the inner wall of the arc-shaped cavity at the accumulation position. This position is exactly the position where the inside of the arc-shaped cavity is most severely eroded. Therefore, after adding the triangular protective layer, the wear of the inner cavity of the shell 101 is effectively reduced, and the service life of the valve is effectively increased.

[0030] A support frame for connection and fixing is provided between the piston cylinder 102 and the housing 101, and a lubricating oil filling channel 103 connecting the inner cavity of the piston cylinder 102 and the outside of the housing 101 is provided in the support frame. The lubricating oil filling channel 103 is located at the opening outside and a sealing plug 4 is installed in cooperation;

[0031] Lubricating oil is added into the gap between the piston 301 and the piston cylinder 102 through the lubricating oil filling channel 103 to ensure smooth and fast sliding between the two and avoid jamming.

[0032] This valve is used in working environments with a lot of particles and dust. Since the dust repose angle is 35-45°, the valve inlet is designed to be a plane structure, which allows the particles and dust to accumulate on the top of the piston 301 in a triangle. In this way, it will form a collapse state under the action of the subsequent dust medium. Under the action of gravity, the flow direction is changed. The sealing ring 303 is designed to be in the area where dust cannot be washed away, thereby extending the service life. The arc cavity has a large area, which slows down the flow rate. When the medium enters the lower cavity, a dust accumulation area is designed, namely a triangular protective layer, which slows down the scouring of the inner wall of the shell 101 by dust, thereby extending the service life.

[0033] The device driving the piston 301 to move up and down adopts a built-in design structure to avoid dust erosion, thereby extending the service life. The valve adopts a pneumatic structure, such as a cylinder, or a rotating connecting rod mechanism, which opens and closes quickly to avoid dust erosion on the sealing surface. Even if the sealing surface is damaged, the sealing ring 303 of the valve is made of high-temperature resistant fluororubber, that is, a soft sealing structure is adopted, thereby extending the service life of the valve.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-opening low-wear ash discharge valve, comprising a valve body (1) and a valve core (3), characterized in that: The valve body (1) comprises an outer shell (101) and a piston cylinder (102); the outer shell (101) is a rotary structure with openings at both ends; the middle part of the inner cavity of the outer shell (101) is an arc-shaped cavity protruding outward; wear-resistant components (2) are arranged at the upper and lower openings of the outer shell (101); the wear-resistant components (2) comprise an upper sleeve (201) and a lower sleeve (202) respectively sleeved at the upper and lower openings; the upper end of the piston cylinder (102) is open; The piston cylinder (102) is coaxially arranged with the housing (101); the lower end of the upper sleeve (201) is flush with the upper end opening of the arc-shaped cavity; a guide ring (203) is horizontally fixedly arranged on the inner wall of the upper sleeve (201); the upper end of the lower sleeve (202) is higher than the lower end opening of the arc-shaped cavity; the height of the upper end of the lower sleeve (202) above the lower end opening of the arc-shaped cavity is 0.1-0.3 times the total height of the arc-shaped cavity; the piston cylinder (102) is fixedly mounted on the housing (101); 01), a material passing channel is left between the outer wall of the piston cylinder (102) and the inner wall of the housing (101), a valve core (3) is axially slidably installed in the piston cylinder (102), the outer diameter of the upper end of the valve core (3) is equal to the inner diameter of the upper end opening of the housing (101), the valve core (3) comprises a piston (301) and a receiving plate (302), the piston (301) is slidably installed with the piston cylinder (102), and the receiving plate (302) is fixedly installed on the piston cylinder (102). The top end of the piston (301) has an outer diameter of the receiving plate (302) that is equal to the inner diameter of the upper sleeve (201). When the valve core (3) slides to the highest position, the upper end of the valve core (3) is inserted into the upper end opening of the housing (101) and forms a seal with the guide ring (203); when the valve core (3) slides to the lowest position, the upper end surface of the valve core (3) contacts the inner wall of the arc-shaped cavity of the housing (101), and a material transfer channel is formed through the gap between the receiving plate (302) and the lower sleeve (202).

2. The fast-opening low-wear ash discharge valve according to claim 1 is characterized in that: The upper surface of the guide ring (203) is an inclined surface with the center of the circle tilted downward, the lower end of the inner wall of the upper sleeve (201) is provided with an oblique angle, and the upper end of the outer circumferential wall of the valve core (3) is provided with a sealing ring (303), and the upper surface of the sealing ring (303) is provided with a sealing surface with the same angle as the oblique angle of the bottom end of the upper sleeve (201). When the piston (301) slides to the highest position, the receiving plate (302) is inserted into the upper sleeve (201), and the upper end of the side wall of the receiving plate (302) is located below the guide ring (203), and the sealing surface of the sealing ring (303) contacts and seals with the oblique angle surface of the lower end of the upper sleeve (201).

3. The fast-opening low-wear ash discharge valve according to claim 1 is characterized in that: A support frame for connection and fixing is provided between the piston cylinder (102) and the outer shell (101), and a lubricating oil filling channel (103) connecting the inner cavity of the piston cylinder (102) and the outside of the outer shell (101) is provided in the support frame. A sealing plug (4) is installed in cooperation with the opening of the lubricating oil filling channel (103) located outside.

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