Cinder valve

Abstract

The utility model relates to the technical field of valves, in particular to a cinder valve, which comprises a valve body, a valve seat fixed in the valve body, an upper valve rod, a lower valve rod and a spherical valve core fixed between the upper valve rod and the lower valve rod, a rubber layer is arranged on the inner wall surface of the valve body; an alloy layer is arranged on the sealing surface of the valve core and the valve seat; square grooves are formed in the upper portion and the lower portion of the valve element respectively, the upper valve rod and the lower valve rod are located in the square grooves, and gaps exist between the upper valve rod and the square grooves and between the lower valve rod and the square grooves. According to the scheme, the rubber layer is arranged on the inner wall of the valve body, ash and dust can be prevented from being accumulated in the valve body, it is guaranteed that the ash and dust can be discharged smoothly, and therefore the valve is prevented from being stuck; meanwhile, friction abrasion between the valve element and the valve seat is reduced through the floating effect of the valve element, the alloy layer is arranged on the sealing face of the valve element and the valve seat, the scouring resistance is further enhanced, and the service life of the valve is effectively prolonged by more than three times.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve, concretely is to unload ash valve. BACKGROUND

[0002] The unload ash valve is a kind of valve specially used to control and regulate dry powder, granular material flow, is widely used in cement, electric power, metallurgy, chemical industry, environmental protection and other industries, especially suitable for blast furnace coal powder injection, dust containing solid powder pipeline system and other working conditions, it controls valve core by rotating or sliding to realize the opening and closing of material passage.

[0003] There are many kinds of unload ash valves, wherein the unload ash ball valve refers to the valve with spherical valve core, the spherical valve core is provided with through hole in the middle, the orientation of through hole is changed by rotating spherical valve core to realize the connection and cut-off of pipeline at both ends of valve, with good sealing, high safety degree, such as prior art "pneumatic unload ash ball valve"(publication number: CN204755990U).But the prior art still has the following technical problems:

[0004] Since the flow medium in unload ash valve is usually ash dust of powder or granular material, ash dust will cause valve core wear when contacting valve core, and friction wear will also occur when valve core contacts valve seat, the wear of prior art valve is more serious in long-term use, finally leading to valve sealing, causing valve life to decrease;At the same time, ash dust is also easy to accumulate in the gap between valve body and valve core, and the more the ash dust is accumulated, the more the ash dust is pressed, finally leading to valve jamming or damage, seriously shortening the service life of valve. UTILITY MODEL CONTENTS

[0005] The utility model provides unload ash valve, can solve the problem of prior art valve, which is prone to cause sealing, valve jamming, and causes valve life to decrease.

[0006] The application provides the following technical scheme: unload ash valve, including valve body, valve seat fixed in valve body, upper valve rod and lower valve rod rotationally connected in the inside of valve body, and spherical valve core fixed between upper valve rod and lower valve rod;

[0007] The inner wall surface of the valve body is provided with a rubber layer;The sealing surface of the valve core and the valve seat is provided with an alloy layer;

[0008] The upper and lower sides of the valve core are respectively provided with square grooves, and the upper valve rod and the lower valve rod are located in the square grooves, and the upper valve rod, the lower valve rod and the square grooves all have gaps.

[0009] Beneficial effects:

[0010] 1. Preventing the accumulation of ash dust inside the valve body, avoiding the valve core from being stuck, and prolonging the service life of the valve. The rubber layer on the inner wall of the valve body is elastic and not easy to attach dust, so that in the process of repeated opening and closing of the valve, the dust is not easy to be pressed and adhered on the inner wall of the valve body, but the dust will be loosened due to the action of the valve core combined with the resilience of the rubber layer, ensuring that the ash dust can be smoothly discharged, avoiding the accumulation of ash dust, thereby preventing the valve from being stuck and prolonging the service life of the valve.

[0011] 2. Reducing the friction loss between the valve core and the valve seat, ensuring the sealing performance and further prolonging the service life. The gap between the upper valve rod, the lower valve rod and the square groove of the valve core allows the valve core to axially displace and float along the ash dust conveying direction in the valve body, and further allows the gap between the valve core and the valve seat, so that the friction loss between the valve core and the valve seat is reduced when the valve core rotates, and when the valve is in the closed state, the ash dust in the valve inlet pushes the valve core, due to the gap, the valve core is pressed on the valve seat to block the valve outlet end to achieve sealing, thereby reducing the wear caused by the mutual rotation of the valve core and the valve seat, while ensuring the sealing performance of the valve and prolonging the service life of the valve core.

[0012] Further, the material of the rubber layer is any one of nitrile rubber, polytetrafluoroethylene, polytrifluorochloroethylene and polyethylene propylene.

[0013] Beneficial effect: The rubber layer has good wear resistance and corrosion resistance, making the valve have both the strength of metal and the corrosion resistance, which can prolong the service life of the valve body.

[0014] Further, the alloy layer material of the sealing surface of the valve seat and the valve core is a special alloy with high molybdenum content.

[0015] Beneficial effect: Since the valve core and the valve seat need to be in contact repeatedly during the opening and closing of the valve, the wear-resistant alloy layer on the contact surface can greatly improve the erosion resistance of the sealing surface and prolong the service life of the valve.

[0016] Further, the part of the upper valve rod and the lower valve rod extending into the valve core is a square head structure.

[0017] Beneficial effect: The square head structure facilitates the rotation of the valve rod and the valve core, and facilitates the disassembly, installation and maintenance of the valve rod and the valve core.

[0018] Further, a sealing ring is installed between the rod part of the upper valve rod and the valve body.

[0019] Beneficial effect: The sealing ring can prevent the ash dust in the valve body from leaking from the rotating gap between the valve rod and the valve body, and improve the sealing performance of the valve body.

[0020] Furthermore, the valve body is also provided with a drive mechanism, which includes a mounting bracket fixed on the valve body, a hydraulic cylinder pivotally connected to the mounting bracket, and a swing arm connected between the hydraulic cylinder and the upper valve stem.

[0021] Beneficial effects: The hydraulic cylinder controls the upper valve stem to rotate 90 degrees through the swing arm, thereby driving the valve core to rotate in the valve body, realizing the automatic opening or closing of the valve.

[0022] Furthermore, the hydraulic cylinder is fixed with a locking ring, the outer periphery of which is pivotally connected to the mounting bracket.

[0023] Beneficial effects: The locking ring is used to fix the hydraulic cylinder, which facilitates the disassembly and assembly of the hydraulic cylinder. Since the hydraulic cylinder needs to push the swing arm to swing, the locking ring is pivotally connected to the mounting bracket, which allows the hydraulic cylinder to adjust its position according to the movement of the swing arm and prevents the hydraulic cylinder from jamming when it moves. Attached Figure Description

[0024] Figure 1 This is the main structural view of the present invention.

[0025] Figure 2 for Figure 1 A magnified top-down view of the central drive mechanism. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method:

[0027] The markings in the accompanying drawings include: valve body 1, valve seat 2, valve core 3, lower valve stem 4, cover plate 5, sealing ring 6, hydraulic cylinder 7, locking ring 8, piston rod 9, mounting bracket 10, upper valve stem 11, swing arm 12, feed port 13, discharge port 14, rubber layer 15.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, the ash discharge valve includes a valve body 1, a valve seat 2 fixed inside the valve body 1, an upper valve stem 11 and a lower valve stem 4 rotatably connected inside the valve body 1, a spherical valve core 3 fixed between the upper valve stem 11 and the lower valve stem 4, and a drive mechanism fixed above the valve body 1. The valve body 1 has mounting cavities at its top and bottom, and the upper valve stem 11 and the lower valve stem 4 are rotatably connected in the mounting cavities.

[0030] Both valve core 3 and valve seat 2 have a through hole in the middle. The valve body 1 has an inlet 13 and an outlet 14 at both ends. The ash and dust are transported from the inlet 13 through the valve core 3 and valve seat 2 and then discharged from the outlet 14.

[0031] The inner wall surface of the valve body 1 is provided with a rubber layer 15, the material of the rubber layer 15 is any one of butadiene rubber, polytetrafluoroethylene, polytrifluorochloroethylene and polyethylene propylene, the rubber layer 15 has good wear resistance and corrosion resistance, so that the valve has the strength of metal and the corrosion resistance, and the service life of the valve body 1 is improved.

[0032] The upper and lower parts of the valve core 3 are respectively provided with square grooves, the upper valve rod 11 and the lower valve rod 4 are located in the square grooves, and the parts of the upper valve rod 11 and the lower valve rod 4 extending into the valve core 3 are square head structures, so as to be matched with the square groove shape of the valve core 3, and the square head structure is convenient for the valve rod to drive the valve core 3 to rotate; there are gaps between the upper valve rod 11, the lower valve rod 4 and the square grooves, so that the valve core 3 can realize a small amount of floating in the axial direction in the valve body 1 along the ash dust conveying direction; the valve core 3 and the valve seat 2 are prevented from hard friction when being in contact, and the friction loss is reduced; a special alloy layer with high molybdenum content is arranged on the sealing contact surface between the valve core 3 and the valve seat 2, so as to further improve the erosion resistance of the sealing surface of the valve core 3 and the valve seat 2. The lower valve rod 4 is further fixed with a cover plate 5, the cover plate 5 is used for plugging the installation cavity opening part below the valve body 1, so as to prevent the ash dust in the valve body 1 from leaking from the installation cavity opening part. The upper valve rod 11 is installed with a sealing ring 6 in the installation cavity above the valve body 1, the sealing ring 6 can prevent the ash dust in the valve body 1 from leaking from the rotating gap between the valve rod and the valve body 1, and a gland is further arranged above the sealing ring 6, so as to seal the installation cavity opening part above the valve body 1; the sealing property of the valve body 1 is improved.

[0033] The driving mechanism comprises a mounting frame 10 fixed above the valve body 1, a hydraulic cylinder 7 pivotally connected to the mounting frame 10 and a swing arm 12 connected between the hydraulic cylinder 7 and the upper valve rod 11. Figure 1 and Figure 2 As shown in the drawings, the hydraulic cylinder 7 is fixed with a locking ring 8 close to the outer circle of the end part of the piston rod 9, the locking ring 8 is located in the middle of the mounting frame 10, the outer periphery of the locking ring 8 is pivotally connected between the upper and lower plates of the mounting frame 10, and the top end of the upper valve rod 11 is rotationally connected to the mounting frame 10; one end of the swing arm 12 is fixed on the rod part of the upper end of the upper valve rod 11, and the other end of the swing arm 12 is pivotally connected to the end part of the piston rod 9 of the hydraulic cylinder 7, so that the hydraulic cylinder 7 can drive the swing arm 12 to drive the upper valve rod 11 and the valve core 3 to rotate.

[0034] The use method of the ash valve is as follows:

[0035] Figure 1In the middle, the ash valve is in the open state, at this time the through hole in the middle of the valve core 3 is in the same axial direction with the inlet 13 and the outlet 14, the ash dust can enter from the inlet 13 and then pass through the valve core 3 and the valve seat 2 and then be discharged from the outlet 14; when it is necessary to close the valve; the hydraulic cylinder 7 drives the piston rod 9 to extend, the swing arm 12 and the upper valve rod 11 are rotated by ninety degrees, the valve core 3 is rotated synchronously with the upper valve rod 11, until the middle hole of the valve core 3 forms a right angle of ninety degrees with the ash dust conveying direction, the middle hole of the valve core 3 is staggered with the inlet 13 and the outlet 14, and due to the gap between the upper valve rod 11 and the lower valve rod 4 and the square groove of the valve core 3, the valve core 3 can realize a small amount of floating in the valve body 1 along the ash dust conveying direction, the ash dust thrust at the inlet 13 pushes the valve core 3, the valve core 3 is pressed on the valve seat 2 to block the outlet end of the valve to realize the sealing of the closed valve, the existence of the gap prevents the hard friction of the contact surface between the valve core 3 and the valve seat 2, and the wear-resistant alloy layer arranged on the contact surface between the valve core 3 and the valve seat 2 can improve the erosion resistance, and the overall service life of the valve is improved; the rubber layer 15 on the inner wall of the valve body 1 is elastic and not easy to attach dust, in the repeated opening and closing process of the valve, the dust is not easy to be pressed and adhered on the inner wall of the valve body 1 by the valve core 3, but the dust is loosened due to the action of the valve core 3 combined with the resilience of the rubber layer 15, so that the ash dust can be smoothly discharged, the accumulation of the ash dust is avoided, the valve is prevented from being stuck, and the service life of the valve is increased by more than three times.

[0036] The above is only an embodiment of the present application, the present application is not limited to this embodiment, the field involved in the embodiment, and the specific structure and characteristics of the scheme known in the art are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. An ash discharge valve, comprising a valve body, a valve seat fixed within the valve body, an upper valve stem and a lower valve stem rotatably connected within the valve body, and a spherical valve core fixed between the upper and lower valve stems, characterized in that: The inner wall of the valve body is provided with a rubber layer; the sealing surface between the valve core and the valve seat is provided with an alloy layer; The valve core is provided with square grooves above and below, and the upper valve stem and lower valve stem are located in the square grooves, with gaps between the upper valve stem, lower valve stem and square groove.

2. The ash discharge valve according to claim 1, characterized in that: The rubber layer is made of any one of nitrile rubber, polytetrafluoroethylene, polychlorotrifluoroethylene, and polyethylene propylene.

3. The ash discharge valve according to claim 2, characterized in that: The alloy layer of the sealing surface between the valve seat and the valve core is made of a special alloy with a high molybdenum content.

4. The ash discharge valve according to claim 3, characterized in that: The portions of the upper and lower valve stems that extend into the valve core have a square head structure.

5. The ash discharge valve according to claim 4, characterized in that: A sealing ring is installed between the stem of the upper valve and the valve body.

6. The ash discharge valve according to claim 5, characterized in that: The valve body is also provided with a drive mechanism, which includes a mounting bracket fixed on the valve body, a hydraulic cylinder pivotally connected to the mounting bracket, and a swing arm connected between the hydraulic cylinder and the upper valve stem.

7. The ash discharge valve according to claim 6, characterized in that: The hydraulic cylinder is fixed with a locking ring, and the outer periphery of the locking ring is pivotally connected to the mounting bracket.

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