Material conveying disc valve

Abstract

The utility model provides a material conveying disc valve, which comprises an upper valve cover, a lower valve cover and a lower valve cover, the lower valve cover is provided with a lower material inlet / outlet; the valve body cylinder is positioned between the upper valve cover and the lower valve cover to form a valve cavity; the valve plate assembly is positioned in the valve cavity and is matched with the upper and lower feeding and discharging ports; the valve rod is mounted on the upper valve cover and the lower valve cover; the rotating arm is connected with the valve rod and the valve plate assembly; the driving assembly is connected with the valve rod and can drive the rotating arm and the valve plate assembly to rotate around the valve rod so as to close and open the material inlet and outlet; wherein mounting grooves are formed in the upper valve cover and the lower valve cover, first gaskets are arranged in the mounting grooves, and the two ends of the valve body cylinder are inserted into the mounting grooves and abut against the first gaskets; the upper valve deck and the lower valve deck are connected through a bolt assembly. The upper valve cover, the lower valve cover and the valve body cylinder of the disc valve are of a split structure, the two ends of the valve body cylinder are inserted into the upper valve cover and the lower valve cover and connected through the bolt assembly, the upper valve cover and the lower valve cover are good in overall connectivity, the problems of abrasion, looseness and sealing failure are not prone to occurring in the using process, the service life is long, and installation and maintenance are convenient.

Description

Technical Field

[0001] This utility model belongs to the field of disc valve technology, and specifically relates to a material conveying disc valve. Background Technology

[0002] In thermal power generation, polysilicon, and coal chemical industries, conveying disc valves used in ash removal systems and material conveying processes typically have a one-piece cast valve body, connected to the upper and lower valve covers by bolts. The connection between the valve body and the upper and lower valve covers is a hard metal-to-metal seal. During operation, high-speed material conveying generates significant impact on the pipeline and disc valve, causing vibration. The contact surfaces between the valve body and the upper and lower valve covers are prone to wear during vibration, and the connection can loosen, easily leading to seal failure. Frequent inspection and maintenance are required, and when wear is severe, the valve body and upper and lower valve covers need to be replaced, resulting in a short valve lifespan and high maintenance costs. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a material conveying disc valve. The upper valve cover, lower valve cover, and valve body cylinder of the disc valve are separate structures. The two ends of the valve body cylinder are inserted into the upper valve cover and lower valve cover and connected by bolt assembly. The upper valve cover and lower valve cover have good overall connection and are not prone to wear, loosening, and sealing failure during use. It has a long service life and is easy to install and maintain.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A material conveying disc valve, characterized in that it comprises:

[0006] The upper valve cover is equipped with an upper inlet and outlet port;

[0007] The lower valve cover has a lower inlet and outlet port on it;

[0008] The valve body cylinder is installed between the upper valve cover and the lower valve cover, forming a valve cavity with the upper valve cover and the lower valve cover;

[0009] The valve plate assembly, located inside the valve cavity, can be sealed and fitted with the upper inlet / outlet and the lower inlet / outlet;

[0010] The valve stem is rotatably mounted on the upper and lower valve covers;

[0011] A rotating arm, located inside the valve cavity, is connected at one end to the valve stem and at the other end to the valve plate assembly;

[0012] The drive assembly, whose output end is connected to the valve stem, can drive the valve stem to rotate, thereby causing the rotating arm and valve plate assembly to rotate around the valve stem, so as to realize the closing and opening of the upper inlet and outlet and the lower inlet and outlet by the valve plate assembly;

[0013] The upper valve cover and the lower valve cover have corresponding mounting grooves on the side facing the valve cavity. A first gasket is provided in the mounting groove. The two ends of the valve body cylinder are respectively inserted into the mounting groove and abut against the first gasket. The upper valve cover and the lower valve cover are connected by a bolt assembly.

[0014] In one embodiment of this application, the bolt assembly includes a stud passing through the upper valve cover and the lower valve cover, and a flat washer, a spring washer and a nut disposed at both ends of the stud; the bolt assembly is connected to the upper valve cover and the lower valve cover on the outside of the valve body cylinder.

[0015] In one embodiment of this application, the valve plate assembly includes:

[0016] The support sleeve is connected to the rotating arm;

[0017] Two springs are respectively installed in the upper and lower mounting cavities of the support sleeve. One end of the spring abuts against the partition in the middle of the mounting cavity, and the other end is connected to the spring seat.

[0018] Two valve plates are respectively installed at both ends of the support sleeve. One end of the valve plate is slidably sleeved on the support sleeve and abuts against the spring seat, while the other end abuts against the upper valve cover or the lower valve cover, and can be adapted to seal with the upper inlet / outlet and the lower inlet / outlet.

[0019] In one embodiment of this application, valve seats are provided on the upper inlet / outlet and the lower inlet / outlet facing the valve cavity, and the valve seats are installed on the upper valve cover or the lower valve cover by means of retaining rings and screws.

[0020] In one embodiment of this application, a second gasket is provided between the valve seat and the upper valve cover or the lower valve cover, wherein both the first gasket and the second gasket are graphite-reinforced gaskets.

[0021] In one embodiment of this application, the valve seat is made of ceramic material.

[0022] In one embodiment of this application, the driving component includes:

[0023] The mounting bracket is installed on the upper or lower valve cover via the bolt assembly;

[0024] The cylinder is mounted on the mounting bracket;

[0025] The transmission crank arm is hinged at one end to the output end of the cylinder and at the other end to the valve stem. The cylinder drives the transmission crank arm to move, thereby causing the valve stem to rotate.

[0026] In one embodiment of this application, the driving component further includes:

[0027] Limit switches are mounted on the mounting bracket;

[0028] A limit switch connecting plate, one end of which is connected to the limit switch;

[0029] The connecting rod is hinged at one end to the other end of the limit switch connecting plate and at the other end to the middle of the transmission crank arm.

[0030] In one embodiment of this application, inlet and outlet flanges are provided on the outer sides of both the upper and lower inlet and outlet ports. The two inlet and outlet flanges are coaxially arranged, with one end welded to the upper or lower inlet and outlet port and the other end being a flange for connection.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] 1. The material conveying disc valve of this utility model has a separate structure of upper valve cover, lower valve cover and valve body cylinder. The valve body cylinder has a cylindrical structure and its two ends are inserted into the mounting grooves of the upper valve cover and lower valve cover and connected by bolt assembly. The upper valve cover and lower valve cover have good overall connection. During use, the upper valve cover, lower valve cover and valve body cylinder are not prone to wear, loosening and sealing failure. It has a long service life and is easy to install and maintain.

[0033] 2. The upper and lower valve covers are directly connected by studs, ensuring precise alignment between them and thus guaranteeing stable valve stem installation and operation, and precise coaxial alignment between the upper and lower inlet / outlet ports.

[0034] 3. Both the upper and lower inlet / outlet are equipped with valve seats, which can be detached and installed using retaining rings and screws. The valve seats are made of ceramic material, which provides good sealing stability and low friction during mating. They also have excellent wear resistance, corrosion resistance, and high temperature resistance, which can effectively reduce wear caused by friction and impact from high-temperature materials, resulting in good sealing performance. Furthermore, the valve seat is equipped with a second gasket, which allows the valve seat to better abut against the valve plate for sealing. The valve seat is detachable and can be replaced when it wears out, avoiding the need to replace the entire upper and lower valve covers, thus extending the service life of the disc valve and reducing maintenance costs.

[0035] 4. The drive assembly is equipped with limit switches, limit switch connecting plates and connecting rods, which can accurately limit the rotation range of the transmission crank arm, thereby precisely controlling the movement of the valve plate assembly and realizing the accurate closing and opening of the upper and lower inlet and outlet ports. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a top view of the material conveying disc valve.

[0038] Figure 2 This is a top view of the material conveying disc valve when it is driven to open.

[0039] Figure 3 This is a cross-sectional schematic diagram of a material conveying disc valve.

[0040] Figure 4 This is a partial cross-sectional schematic diagram of a material conveying disc valve.

[0041] Figure 5 for Figure 3 A magnified schematic diagram of part A in the middle.

[0042] Figure label:

[0043] 1. Upper valve cover; 10. Mounting groove; 101. First gasket; 11. Upper inlet / outlet;

[0044] 2. Lower valve cover; 21. Lower inlet / outlet;

[0045] 3. Valve body cylinder; 30. Valve cavity;

[0046] 4. Valve plate assembly; 41. Support sleeve; 411. Mounting cavity; 412. Partition plate; 42. Spring; 43. Spring seat; 44. Valve plate;

[0047] 5. Valve stem; 51. Rotary arm;

[0048] 6. Drive assembly; 61. Mounting bracket; 62. Cylinder; 63. Drive crank arm; 64. Limit switch; 65. Limit switch connecting plate; 66. Connecting rod;

[0049] 7. Bolt assembly; 71. Stud; 72. Flat washer; 73. Spring washer; 74. Nut;

[0050] 8. Valve seat; 81. Snap ring; 82. Screw; 83. Second gasket;

[0051] 9. Inlet and outlet flange pipes. Detailed Implementation

[0052] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0053] In the description of this utility model, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0054] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0057] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0058] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0059] This utility model embodiment provides a material conveying disc valve, such as Figures 1 to 5 As shown, the material conveying disc valve includes: an upper valve cover 1, a lower valve cover 2, a valve body cylinder 3, a valve plate assembly 4, a valve stem 5, a rotating arm 51, and a drive assembly 6, etc.

[0060] The upper valve cover 1 and the lower valve cover 2 are arranged parallel to each other. The upper valve cover 1 has an upper inlet / outlet port 11, and the lower valve cover 2 has a lower inlet / outlet port 21. The upper inlet / outlet port 11 and the lower inlet / outlet port 21 are arranged coaxially.

[0061] The valve body cylinder 3 has a cylindrical structure and is installed between the upper valve cover 1 and the lower valve cover 2, forming a valve cavity 30 together with the upper valve cover 1 and the lower valve cover 2.

[0062] The valve plate assembly 4 is located inside the valve cavity 30 and is configured to seal with the upper inlet / outlet 11 and the lower inlet / outlet 21, for closing or opening the upper inlet / outlet 11 and the lower inlet / outlet 21.

[0063] The valve stem 5 is rotatably mounted on the upper valve cover 1 and the lower valve cover 2. One end is rotatably connected to the lower valve cover 2 (or the upper valve cover 1), and the other end passes through the upper valve cover 1 (or the lower valve cover 2) via a shaft seal and extends beyond the upper valve cover 1 (or the lower valve cover 2) to connect with the drive assembly 6. The axis of the valve stem 5 is parallel to the axes of the upper inlet / outlet 11 and the lower inlet / outlet 21.

[0064] The rotating arm 51 is located inside the valve cavity 30, with one end fixedly connected to the valve stem 5 and the other end fixedly connected to the valve plate assembly 4. The rotating arm 51 drives the valve plate assembly 4 to rotate together with the valve stem 5 around the axis of the valve stem 5, so that the valve plate assembly 4 rotates to block the upper inlet / outlet 11 and the lower inlet / outlet 21, or rotates the valve plate assembly 4 to open the upper inlet / outlet 11 and the lower inlet / outlet 21.

[0065] The drive assembly 6 provides the drive, and its output end is fixedly connected to one end of the valve stem 5 located outside the valve cavity 30. The drive assembly 6 can drive the valve stem 5 to rotate, thereby driving the rotating arm 51 and the valve plate assembly 4 to rotate around the axis of the valve stem 5, so as to realize the valve plate assembly 4 to close / block or open / connect the upper inlet / outlet 11 and the lower inlet / outlet 21.

[0066] The upper cover plate 1 and the lower cover plate 2 have corresponding annular mounting grooves 10 on their surfaces facing the valve cavity 30. These mounting grooves 10 are adapted to fit the valve body cylinder 3. A first gasket 101 is provided in the mounting groove 10. Both ends of the valve body cylinder 3 are respectively inserted into and limited within the mounting grooves 10 of the upper cover plate 1 and the lower cover plate 2, and abut against the first gasket 101 within the mounting groove 10. Then, the upper cover plate 1 and the lower cover plate 2 are connected and tightened by a number of bolt assemblies 7, thereby limiting and fixing the valve body cylinder 3 between the upper cover plate 1 and the lower cover plate 2.

[0067] In summary, the upper valve cover 1, lower valve cover 2, and valve body cylinder 3 of this material conveying disc valve are separate structures. The valve body cylinder 3 is designed as a cylindrical structure, with both ends inserted into the mounting grooves 10 of the upper valve cover 1 and lower valve cover 2. The upper valve cover 1 and lower valve cover 2 are connected by bolt assemblies 7, resulting in good overall connection and structural stability. During use, the upper valve cover 1, lower valve cover 2, and valve body cylinder 3 are not prone to wear, loosening, or sealing failure, resulting in a long service life and convenient installation and maintenance.

[0068] Preferably, each bolt assembly 7 includes a stud 71, two flat washers 72, two spring washers 73, and two nuts 74. The stud 71 passes through the upper valve cover 1 and the lower valve cover 2, with flat washers 72, spring washers 73, and nuts 74 respectively fitted at both ends. Tightening the nuts 74 at both ends tightens the upper valve cover 1 and the lower valve cover 2 into a secure connection. The bolt assembly 7 is located on the outside of the valve body cylinder 3 (i.e., outside the circumference of the valve body cylinder 3) and connects to the upper valve cover 1 and the lower valve cover 2. By setting flat washers 72 and spring washers 73 between the valve cover and the nuts 74, the bolt assembly 7 is securely and stably connected, and is not easily loosened by vibration. The stud 71 passes through and connects the upper valve cover 1 and the lower valve cover 2, which reduces the number of bolt assemblies 7 compared to the upper valve cover 1 and the lower valve cover 2 being connected to the valve body separately by bolts. This makes the installation operation simpler, and the connection between the upper valve cover 1 and the lower valve cover 2 has better overall integrity and a positioning function, resulting in higher installation accuracy.

[0069] In one implementation, such as Figure 4 and Figure 5 As shown, the valve plate assembly 4 includes a support sleeve 41, two springs 42, two spring seats 43, and two valve plates 44.

[0070] The outer side of the support sleeve 41 is fixedly connected to the other end of the rotating arm 51. The support sleeve 41 has an axially arranged mounting cavity 411. A partition 412 is provided in the middle of the mounting cavity 411 to divide the mounting cavity 411 into an upper mounting cavity and a lower mounting cavity.

[0071] Two springs 43 are respectively installed in the upper and lower mounting cavities 411 of the support sleeve 41. One end of the spring 43 abuts against the partition plate 412 in the middle of the mounting cavity 411, and the other end is connected to the spring seat 43. The spring seat 43 can slide relative to the mounting cavity 411, and the spring seat 43 is pushed out of the mounting cavity 411 by the spring 43 and abuts against the valve plate 44.

[0072] Two valve plates 44 are respectively installed at both ends of the support sleeve 41. One end of the valve plate 44 is slidably sleeved on the outside of the support sleeve 41 and abuts against the spring seat 43. The other end of the valve plate 44 abuts against the upper valve cover 1 or the lower valve cover 2 and can be adapted to seal with the upper inlet / outlet 11 and the lower inlet / outlet 21.

[0073] The valve plate assembly 4 is driven to move by the valve stem 5 and the rotating arm 51 to seal or open the upper inlet / outlet 11 and the lower inlet / outlet 21; the spring 43 is in a compressed state, pushing the spring seat 43 to press the valve plate 44 against the upper valve cover 1 and the upper inlet / outlet 11 or the lower valve cover 2 and the lower inlet / outlet 21.

[0074] Furthermore, valve seats 8 are provided on the side of the upper inlet / outlet 11 and the lower inlet / outlet 21 facing the valve cavity 30. The valve seats 8 have an annular structure, and their inner diameter is the same as that of the inlet / outlet 11 and the lower inlet / outlet 21. The valve seats 8 are installed in the valve seat mounting parts of the upper valve cover 1 and the lower valve cover 2 via retaining rings 81 and screws 82. The inner diameter of the retaining ring 81 is larger than the inner diameter of the valve seat 8 but smaller than the outer diameter of the valve seat 8, and the outer diameter of the retaining ring 81 is larger than the outer diameter of the valve seat 8. The retaining ring 81 is pressed against the side of the valve seat 8 facing the valve cavity 30, and the retaining ring 81 is fixed to the upper valve cover 1 or the lower valve cover 2 by screws 82, thereby limiting the installation of the valve seat 8 in the valve seat mounting part. The valve seat 8 is a detachable installation structure and can be replaced by disassembly.

[0075] A second gasket 83 is provided between the valve seat 8 and the upper valve cover 1 or the lower valve cover 2, that is, the second gasket 83 is provided on the side of the valve seat 8 away from the valve cavity 30. Preferably, the second gasket 83 and the first gasket 101 are both graphite-reinforced gaskets. They have good compression resilience, high strength, corrosion resistance and high temperature resistance, which allows for elasticity between the valve seat 8 and the valve seat mounting part, and between the valve body cylinder 3 and the mounting groove 10, and ensures good sealing.

[0076] Preferably, the valve seat 8 is made of ceramic material, i.e., the valve seat 8 is a ceramic valve seat. The use of a ceramic valve seat has characteristics such as smooth surface, high temperature resistance, high strength, and corrosion resistance, making the movement of the valve seat assembly 4 smoother when switching on and off, providing a better seal between the valve seat 8 and the valve plate, reducing wear during use, and extending service life.

[0077] like Figure 1 , Figure 2 and Figure 3 As shown, the drive assembly 6 includes a mounting bracket 61, a cylinder 62, and a transmission crank arm 63, etc.

[0078] The mounting bracket 61 is fixed to the upper valve cover 1 or the lower valve cover 2 via bolt assembly 7, such as Figures 1 to 3 In the embodiment shown, the mounting bracket 61 is mounted on the upper valve cover 1. The cylinder 62 is mounted on the mounting bracket 61 and is hinged to the mounting bracket 61.

[0079] One end of the transmission crank arm 63 is hinged to the output end of the cylinder 62, and the other end is connected and fixed to the end of the valve stem 5 that extends out of the valve cover. When the cylinder 62 reciprocates, it can drive the transmission crank arm 63 to reciprocate, thereby causing the valve stem 5 to rotate reciprocally, which in turn drives the valve plate assembly 4 to close or open the inlet and outlet.

[0080] In one embodiment, the drive assembly 6 further includes a limit switch 64, a limit switch connecting plate 65, and a connecting rod 66. The limit switch 64 is mounted and fixed on the mounting bracket 61. The limit switch connecting plate 65 and the connecting rod 66 are sequentially connected between the limit switch 64 and the transmission crank arm 63. Specifically, one end of the limit switch connecting plate 65 is connected to the limit switch 64, and the other end is hinged to one end of the connecting rod 66. The other end of the connecting rod 66 is hinged to the middle of the transmission crank arm 63. The limit switch 64 is preferably an explosion-proof limit switch DS500-SS. By setting the limit switch 64, the limit switch connecting plate 65, and the connecting rod 66 to connect the mounting bracket 61 and the transmission crank arm 63, the movement range of the transmission crank arm 63 can be limited and positioned, thereby limiting and positioning the rotation angle of the valve stem 5 and the moving valve plate assembly 4, ensuring accurate closure and complete opening of the inlet and outlet.

[0081] like Figure 3 and Figure 4 As shown, both the upper inlet / outlet 11 and the lower inlet / outlet 21 are equipped with inlet / outlet flange pipes 9 on their outer sides. The two inlet / outlet flange pipes 9 are coaxially arranged with the upper inlet / outlet 11 and the lower inlet / outlet 21. One end of the inlet / outlet flange pipe 9 is welded to the side of the upper inlet / outlet 11 or the lower inlet / outlet 21 away from the valve cavity 30 (i.e., the outer side), and the other end is a flange plate used for connection to the material conveying pipeline. The inlet / outlet flange pipes 9 facilitate the installation of the material conveying disc valve.

[0082] In summary, the material conveying disc valve of this application has a separate structure for the upper valve cover 1, lower valve cover 2, and valve body cylinder 3. The valve body cylinder 3 is a cylindrical structure, with both ends inserted into the mounting grooves 10 of the upper valve cover 1 and lower valve cover 2, and connected by bolt assembly 7. The upper valve cover 1 and lower valve cover 2 have good overall connection. During use, the upper valve cover 1, lower valve cover 2, and valve body cylinder 3 are not prone to wear, loosening, or sealing failure, resulting in a long service life and convenient installation and maintenance. Furthermore, the upper valve cover 1 and lower valve cover 2 are directly connected by studs, ensuring precise alignment between them. This, in turn, ensures stable installation and operation of the valve stem 5 and valve plate assembly 4, and precise coaxial alignment between the upper inlet / outlet 11 and lower inlet / outlet 21.

[0083] Both the upper inlet / outlet 11 and the lower inlet / outlet 21 are equipped with valve seats 8. The valve seats 8 are detachable and installable via retaining rings 81 and screws 82. The valve seats 8 are made of ceramic material, which provides good sealing stability and low friction when in contact with the valve. They also have excellent wear resistance, corrosion resistance, and high temperature resistance, which can effectively reduce wear on the contact parts of the valve seats 8 during opening and closing, as well as wear caused by impact from high-temperature materials. The valve seats 8 are equipped with a second gasket 83, which allows the valve seats 8 to better abut and seal with the valve plate 44. The valve seats 8 are detachable and can be replaced when worn, avoiding the need to replace the upper valve cover 1 and lower valve cover 2 as a whole, thus extending the service life of the disc valve and reducing maintenance costs. The drive assembly 6 is equipped with a limit switch 64, a limit switch connecting plate 65, and a connecting rod 66, which can accurately limit the rotation range of the transmission crank arm 63, thereby precisely controlling the movement of the valve plate assembly 4 and realizing the accurate closing and opening of the upper inlet / outlet 11 and the lower inlet / outlet 21.

Claims

1. A material delivery tray valve characterized by, include: The upper valve cover has an upper inlet and outlet port; The lower valve cover has a lower inlet and outlet port on it; The valve body cylinder is installed between the upper valve cover and the lower valve cover, forming a valve cavity with the upper valve cover and the lower valve cover; The valve plate assembly, located inside the valve cavity, can be sealed and fitted with the upper inlet / outlet and the lower inlet / outlet; The valve stem is rotatably mounted on the upper and lower valve covers; A rotating arm, located inside the valve cavity, is connected at one end to the valve stem and at the other end to the valve plate assembly; The drive assembly, whose output end is connected to the valve stem, can drive the valve stem to rotate, thereby causing the rotating arm and valve plate assembly to rotate around the valve stem, so as to realize the closing and opening of the upper inlet and outlet and the lower inlet and outlet by the valve plate assembly; The upper valve cover and the lower valve cover have corresponding mounting grooves on the side facing the valve cavity. A first gasket is provided in the mounting groove. The two ends of the valve body cylinder are respectively inserted into the mounting groove and abut against the first gasket. The upper valve cover and the lower valve cover are connected by a bolt assembly.

2. The material delivery tray valve of claim 1, wherein, The bolt assembly includes studs passing through the upper and lower valve covers, and flat washers, spring washers, and nuts at both ends of the studs; the bolt assembly is connected to the upper and lower valve covers on the outside of the valve body cylinder.

3. The material delivery tray valve of claim 1, wherein, The valve plate assembly includes: The support sleeve is connected to the rotating arm; Two springs are respectively installed in the upper and lower mounting cavities of the support sleeve. One end of the spring abuts against the partition in the middle of the mounting cavity, and the other end is connected to the spring seat. Two valve plates are respectively installed at both ends of the support sleeve. One end of the valve plate is slidably sleeved on the support sleeve and abuts against the spring seat, while the other end abuts against the upper valve cover or the lower valve cover, and can be adapted to seal with the upper inlet / outlet and the lower inlet / outlet.

4. The material delivery tray valve of claim 3, wherein, The upper and lower inlet / outlet ports are provided with valve seats facing the valve cavity. The valve seats are installed on the upper or lower valve cover by retaining rings and screws.

5. The material delivery tray valve of claim 4, wherein, A second gasket is provided between the valve seat and the upper or lower valve cover, and both the first and second gaskets are graphite-reinforced gaskets.

6. A material delivery tray valve according to claim 4 or 5, characterised in that, The valve seat is made of ceramic material.

7. The material delivery tray valve of claim 1, wherein, The driving component includes: The mounting bracket is installed on the upper or lower valve cover via the bolt assembly; The cylinder is mounted on the mounting bracket; The transmission crank arm is hinged at one end to the output end of the cylinder and at the other end to the valve stem. The cylinder drives the transmission crank arm to move, thereby causing the valve stem to rotate.

8. The material delivery tray valve of claim 7, wherein, The driving component also includes: Limit switches are mounted on the mounting bracket; A limit switch connecting plate, one end of which is connected to the limit switch; The connecting rod is hinged at one end to the other end of the limit switch connecting plate and at the other end to the middle of the transmission crank arm.

9. The material delivery tray valve of claim 1, wherein, Both the upper and lower inlet / outlet are equipped with inlet / outlet flanges on their outer sides. The two inlet / outlet flanges are coaxially arranged, with one end welded to the upper or lower inlet / outlet and the other end being a flange for connection.

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