Discharge valve and material conveying equipment

Abstract

This article discloses a discharge valve and material conveying equipment. The discharge valve comprises a discharge pipe section and a valve plate. The valve plate is closable and positioned at the outlet of the discharge pipe section to open or close the discharge pipe section. The discharge pipe section is cylindrical and internally provided with a spiral blade. The valve plate is an arc-shaped plate that matches the outer circumference of the spiral blade. When the discharge port of the discharge valve is closed, material will not accumulate, effectively preventing subsequent equipment from clogging.

Description

Technical Field

[0001] The present application relates to, but is not limited to, material conveying technology, and in particular to a discharge valve and material conveying equipment. Background Art

[0002] When conveying powder materials, screw conveyors with multiple outlets often use gate valves to control discharge at each outlet. Gate valves have a flat disc structure, while the screw conveyor's discharge cross-section is curved. When the valve is closed, some material accumulates between the disc and the outlet. When the valve is opened, this accumulated material instantly falls out, potentially clogging subsequent equipment. Summary of the Invention

[0003] The embodiments of the present application provide a discharge valve and material conveying equipment, which will not accumulate materials when the discharge port is closed, and can effectively avoid clogging of subsequent equipment.

[0004] The embodiment of the present application provides a discharge valve, which includes a discharge pipe section and a valve plate. The valve plate is closably arranged at the outlet of the discharge pipe section to open or close the discharge pipe section.

[0005] The discharge pipe section is a cylindrical pipe section with a spiral blade disposed therein; the valve plate is an arc-shaped plate that matches the shape of the outer circumference of the spiral blade. When the valve plate is closed, the inner side of the valve plate is disposed opposite to the outer circumference of the spiral blade.

[0006] The valve plate includes a first blade and a second blade, and the first blade and the second blade are spliced ​​together to form a complete arc-shaped plate.

[0007] The discharge valve further includes a first sliding shaft and a second sliding shaft, wherein the first sliding shaft is connected to the first blade, and the second sliding shaft is connected to the second blade;

[0008] The first sliding shaft and the second sliding shaft respectively drive the first blade and the second blade to move relative to or opposite to each other, so that the first blade and the second blade move closer to or away from each other to open or close the discharge pipe section.

[0009] The discharge valve further includes a box body, which is arranged at the outlet of the discharge pipe section and covers the valve plate. The box body is provided with a discharge port; the first sliding shaft and the second sliding shaft are slidably mounted on the box body.

[0010] Furthermore, the cross section of the first sliding shaft is non-circular, and / or the cross section of the second sliding shaft is non-circular.

[0011] Furthermore, the discharge valve further includes a first sealing member disposed between the first blade and the second blade.

[0012] Furthermore, one end of the first blade abutting against the second blade is provided with a first sealing surface, and one end of the second blade abutting against the first blade is provided with a second sealing surface;

[0013] The first sealing surface and the second sealing surface are both stepped surfaces, and the first sealing member is a sealing strip with a stepped cross-section;

[0014] The first sealing member is fixed on the first sealing surface or the second sealing surface.

[0015] Furthermore, the discharge valve further includes a second sealing member located between the first blade and the discharge pipe section, and a third sealing member located between the second blade and the discharge pipe section.

[0016] Furthermore, a third sealing surface is provided at one end of the first blade abutting against the discharge pipe section, and a fourth sealing surface is provided at one end of the discharge pipe section abutting against the first blade; the third sealing surface and the fourth sealing surface are both stepped surfaces, and the second sealing member is a sealing strip with a stepped cross-section; the second sealing member is fixed to the third sealing surface or the fourth sealing surface;

[0017] A fifth sealing surface is provided at one end of the second blade abutting against the discharge pipe section, and a sixth sealing surface is provided at one end of the discharge pipe section abutting against the second blade; the fifth sealing surface and the sixth sealing surface are both stepped surfaces, and the third sealing member is a sealing strip with a stepped cross-section; the third sealing member is fixed on the fifth sealing surface or the sixth sealing surface.

[0018] Furthermore, the central angle corresponding to the valve plate is greater than or equal to 90° and less than or equal to 180°.

[0019] Furthermore, the central angles corresponding to the first blade and the second blade are both 90°.

[0020] An embodiment of the present application further provides a material conveying device, which includes a conveying body and the aforementioned discharge valve, wherein the discharge valve is arranged at the outlet position of the conveying body.

[0021] Compared with some technologies, this application has the following advantages:

[0022] The discharge valve provided in the embodiments of the present application features a valve plate shaped like a circular arc that matches the spiral blades. This minimizes the space between the valve plate and the spiral blades, preventing material from accumulating between the spiral blades and the valve plate when the valve plate is closed. This, in turn, prevents subsequent equipment clogging caused by the instantaneous fall of accumulated material. The discharge valve provided in the embodiments of the present application has a simple structure and does not require additional complex mechanisms, which reduces the manufacturing cost of the discharge valve and facilitates mass production and application.

[0023] The material conveying equipment provided in the embodiment of the present application has the aforementioned discharge valve, which can close the discharge port as needed to meet the needs of material conveying, and no material will accumulate at the discharge port, thereby improving the reliability of material conveying.

[0024] Other features and advantages of the present application will be set forth in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0026] Figure 1 It is a structural diagram of an existing discharge valve (closed state);

[0027] Figure 2 This is a schematic diagram of the structure of the discharge valve described in the embodiment of this application Figure 1 (Closed state);

[0028] Figure 3 for Figure 2 A magnified view of the structure of the middle A section;

[0029] Figure 4 for Figure 2 A magnified view of the structure of the middle B section;

[0030] Figure 5 for Figure 2 A magnified view of the structure of the middle C section;

[0031] Figure 6 This is a schematic diagram of the structure of the discharge valve described in the embodiment of this application Figure 2 (On state).

[0032] Illustration:

[0033] 1-discharge pipe section, 11-feed port, 12-fourth sealing surface, 13-sixth sealing surface, 2-valve plate, 21-first blade, 211-first sealing surface, 212-third sealing surface, 22-second blade, 221-second sealing surface, 222-fifth sealing surface, 3-spiral blade, 41-first sliding shaft, 42-second sliding shaft, 5-box, 61-first seal, 62-second seal, 63-third seal, 71-existing valve plate, 72-existing spiral blade, 73-existing feed port, 74-existing unloading valve housing, 75-accumulated material. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions and advantages of this application more clear, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of this application can be combined with each other in any way.

[0035] In the existing discharge valve, a switchable valve plate is provided at the discharge port of the discharge valve, and the valve plate is in the form of a flat plate. The spiral blade lifts and transports the material, and at the end (highest point) of the spiral blade, the material falls from the discharge port and is discharged to the subsequent equipment. When the valve plate is closed, the material at the end of the spiral blade will be blocked by the valve plate and cannot be discharged, thereby achieving the purpose of closing the discharge port; at this time, in order to prevent the cylindrical spiral blade and the flat valve plate from interfering with each other, there must be two approximately right-angled triangle areas between the spiral blade and the valve plate, such as Figure 1 As shown in the figure, the shadow represents the material accumulated between the spiral blade and the valve plate; when the valve plate is opened again, the accumulated material will fall down instantly, which may easily block the subsequent conveying equipment.

[0036] The discharge valve provided in the embodiment of the present application eliminates the two approximately right-angled triangle areas mentioned above by changing the shape and structure of the valve plate, so that when the valve plate is closed, no material will accumulate between the spiral blades and the valve plate, thereby avoiding the situation where the accumulated material falls instantly and blocks the subsequent conveying equipment.

[0037] The embodiment of the present application provides a discharge valve, such as Figures 2 to 6 As shown, the discharge valve includes a discharge pipe section 1 and a valve plate 2. The valve plate 2 is arranged at the outlet of the discharge pipe section 1 in an openable and closable manner to open or close the discharge pipe section 1. The discharge pipe section 1 is a cylindrical pipe section with a spiral blade 3 provided therein. The valve plate 2 is an arc-shaped plate and matches the shape of the outer circumferential surface of the spiral blade 3.

[0038] The shape of the valve plate 2 is improved to a circular arc shape that matches the shape of the outer peripheral surface of the spiral blade 3, so that there is no space for material accumulation between the valve plate 2 and the spiral blade 3. Moreover, since the valve plate 2 is in the same circular arc shape as the spiral blade 3, there will be no interference between the two, thereby ensuring the normal operation of the discharge valve.

[0039] In actual application, when the valve plate 2 is closed, a small gap may be left between the inner side of the valve plate 2 and the outer peripheral surface of the spiral blade 3 to avoid scratching between the spiral blade 3 and the valve plate 2. Of course, the amount of material accumulated in the small gap is negligible and will not affect the flow rate of subsequent conveying equipment.

[0040] A feed port 11 is provided at the front end of the feed pipe section.

[0041] In an exemplary embodiment, Figure 2 and Figure 6 As shown, the valve plate 2 includes a first blade 21 and a second blade 22 , and the first blade 21 and the second blade 22 are spliced ​​together to form a complete arc-shaped plate.

[0042] Because the valve plate 2 is an arc-shaped plate rather than a flat plate, the entire valve plate 2 cannot move in one direction. The valve plate 2 is configured to include a first blade 21 and a second blade 22. The first blade 21 and the second blade 22 can be separated or assembled from each other. The first blade 21 and the second blade 22 can move relatively independently, ensuring the normal opening and closing of the valve plate 2 without interfering with the spiral blade 3.

[0043] In an exemplary embodiment, Figure 2 and Figure 6 As shown, the discharge valve also includes a first sliding shaft 41 and a second sliding shaft 42. The first sliding shaft 41 is connected to the first blade 21, and the second sliding shaft 42 is connected to the second blade 22. The first sliding shaft 41 and the second sliding shaft 42 drive the first blade 21 and the second blade 22 to move closer to or away from each other to open or close the discharge pipe section 1.

[0044] The first sliding shaft 41 drives the first blade 21 to move along Figure 2 The second sliding shaft 42 drives the second blade 22 to move to the left. Figure 2 When the first blade 21 and the second blade 22 move to the right, the first blade 21 and the second blade 22 move away from each other, thereby opening the valve plate 2, that is, opening the discharge pipe section 1 to discharge the material. When the first blade 21 and the second blade 22 move closer to each other, the valve plate 2 is closed, that is, closing the discharge pipe section 1 to stop the discharge.

[0045] In an exemplary embodiment, the cross section of the first sliding shaft 41 is non-circular, and / or the cross section of the second sliding shaft 42 is non-circular.

[0046] The cross-section of the first sliding shaft 41 and the second sliding shaft 42 can be set to a non-circular cross-section, such as a rectangle, a triangle, an ellipse, etc., to avoid the relative rotation of the first blade 21 and the second blade 22, which may cause the valve plate 2 to be loosely closed, and to avoid shaking of the valve plate 2 when opening and closing.

[0047] In an exemplary embodiment, Figure 2 and Figure 6 As shown, the discharge valve further includes a box body 5, which is arranged at the outlet of the discharge pipe section 1 and covers the valve plate 2. The box body 5 is provided with a discharge port; the first sliding shaft 41 and the second sliding shaft 42 are slidably mounted on the box body 5.

[0048] A box 5 can also be provided at the outlet of the discharge pipe section 1 to mount the first sliding shaft 41 and the second sliding shaft 42. Furthermore, the provision of the box 5 prevents the valve plate 2 from being directly used as the final outlet of the discharge valve, thereby facilitating sealing between the discharge valve and subsequent conveying equipment.

[0049] A sealing structure may be provided between the first sliding shaft 41 , the second sliding shaft 42 and the box body 5 to prevent material leakage.

[0050] In an exemplary embodiment, Figure 3 As shown, the discharge valve further includes a first sealing member 61 disposed between the first blade 21 and the second blade 22 .

[0051] The first blade 21 and the second blade 22 can be separated from each other to open the valve plate 2. When the first blade 21 and the second blade 22 are assembled to form a complete valve plate 2, that is, when the discharge pipe section 1 is closed, a first sealing member 61 is provided between the first blade 21 and the second blade 22 to ensure a tight connection between the first blade 21 and the second blade 22 to avoid material leakage.

[0052] In an exemplary embodiment, Figure 3 As shown, a first sealing surface 211 is provided at one end of the first blade 21 abutting against the second blade 22, and a second sealing surface 221 is provided at one end of the second blade 22 abutting against the first blade 21; the first sealing surface 211 and the second sealing surface 221 are both stepped surfaces, and the first sealing member 61 is a sealing strip with a stepped cross-section; the first sealing member 61 is fixed on the first sealing surface 211 or the second sealing surface 221.

[0053] A stepped sealing surface is provided on the first blade 21 and the second blade 22, and the first sealing member 61 is provided between the first sealing surface 211 and the second sealing surface 221. When the first blade 21 and the second blade 22 are closed, a certain pressure is applied to the first sealing member 61, causing the first sealing member 61 to produce a certain deformation to enhance the sealing effect here.

[0054] The first sealing member 61 is fixed on the first sealing surface 211 or the second sealing surface 221 so as to move therewith when the first blade 21 and the second blade 22 move away from each other. For example, one end of the first sealing member 61 is bonded and fixed to the first sealing surface 211 of the first blade 21, and the other end of the first sealing member 61 is in abutment with the second sealing surface 221, so that the first sealing member 61 moves with the first blade 21.

[0055] It should be understood that the stepped surface here can be an L-shaped cross-section, a "Z"-shaped cross-section, or a "J"-shaped cross-section.

[0056] In an exemplary embodiment, Figure 4 and Figure 5 As shown, the discharge valve further includes a second sealing member 62 located between the first blade 21 and the discharge pipe section 1 , and a third sealing member 63 located between the second blade 22 and the discharge pipe section 1 .

[0057] The first blade 21 and the second blade 22 slide toward or away from each other to open or close. When closed, a first seal 61 is provided at the contact point between the first blade 21 and the second blade 22, a second seal 62 is provided at the contact point between the first blade 21 and the discharge pipe section 1, and a third seal 63 is provided between the second blade 22 and the discharge pipe section 1. This ensures that the valve plate 2 is tightly sealed when closing the discharge pipe section 1, preventing material leakage.

[0058] In an exemplary embodiment, Figure 4 and Figure 5 As shown, the end of the first blade 21 abutting against the discharge pipe section 1 is provided with a third sealing surface 212, and the end of the discharge pipe section 1 abutting against the first blade 21 is provided with a fourth sealing surface 12; the third sealing surface 212 and the fourth sealing surface 12 are both stepped surfaces, and the second sealing member 62 is a sealing strip with a stepped cross section; the second sealing member 62 is fixed on the third sealing surface 212 or the fourth sealing surface 12; the end of the second blade 22 abutting against the discharge pipe section 1 is provided with a fifth sealing surface 222, and the end of the discharge pipe section 1 abutting against the second blade 22 is provided with a sixth sealing surface 13; the fifth sealing surface 222 and the sixth sealing surface 13 are both stepped surfaces, and the third sealing member 63 is a sealing strip with a stepped cross section; the third sealing member 63 is fixed on the fifth sealing surface 222 or the sixth sealing surface 13.

[0059] The cooperation mode between the first blade 21 and the discharge pipe section 1, and between the second blade 22 and the discharge pipe section 1, can also be in the form of "step surface + sealing element", which will not be repeated here.

[0060] In an exemplary embodiment, the central angle corresponding to the valve plate 2 is greater than or equal to 90° and less than or equal to 180°.

[0061] The central angle corresponding to the valve plate 2 can be 90° to 180° to ensure that the valve plate 2 has a normal sealing effect on the discharge pipe section 1.

[0062] In an exemplary embodiment, the central angles of the first blade 21 and the second blade 22 are both 90°.

[0063] The central angles corresponding to the first blade 21 and the second blade 22 are both 90°. In other words, the first blade 21 and the second blade 22 have the same structure, and the central angle corresponding to the valve plate 2 is 180°, to ensure that the discharge valve has the maximum discharge speed when the valve plate 2 is opened.

[0064] The discharge valve provided in the embodiments of the present application achieves zero material accumulation and a good seal, and can be used in screw conveyors. The shape of the valve plate 2 is consistent with the arc shape of the lower arc surface of the screw conveyor. When the valve plate 2 is closed, the spiral blades 3 push against the valve blades to prevent material from accumulating. When the valve plate 2 is open, the instantaneous amount of material passing through the valve plate 2 is equal to the conveying capacity of the screw conveyor, thus achieving fast and smooth switching and avoiding subsequent equipment blockage.

[0065] An embodiment of the present application further provides a material conveying device, which includes a conveying body and the aforementioned discharge valve, wherein the discharge valve is arranged at the outlet position of the conveying body.

[0066] The material conveying equipment may be a screw conveyor.

[0067] The material conveying equipment provided in the embodiment of the present application has the aforementioned discharge valve, which can close the discharge port as needed to meet the needs of material conveying, and no material will accumulate at the discharge port, thereby improving the reliability of material conveying.

[0068] Example 2

[0069] The embodiment of the present application provides a discharge valve, the main structure of which is the same as that of the first embodiment, and the differences between the two are mainly described here. The main difference between the embodiment of the present application and the first embodiment is: the opening method of the first blade 21 and the second blade 22.

[0070] One end of the first blade 21 is hinged to one side of the outlet of the discharge pipe section 1, and one end of the second blade 22 is hinged to the other side of the outlet of the discharge pipe section 1; the first blade 21 and the second blade 22 rotate around the hinge respectively to open or close the discharge pipe section 1.

[0071] In addition to the above-mentioned method in which the first blade 21 and the second blade 22 slide left and right to open the valve plate 2, the first blade 21 and the second blade 22 can also be opened and closed by rotating: the upper ends of the first blade 21 and the second blade 22 are hinged and fixed, and the lower ends of the first blade 21 and the second blade 22 rotate to close or open.

[0072] The first blade 21 and the second blade 22 are opened by rotating, and the space required is relatively smaller. In other words, the volume of the box body 5 can be smaller, so as to control the overall volume of the discharge valve.

[0073] In the description of this application, it should be noted that the orientations or positional relationships indicated by “upper”, “lower”, “one end”, “one side”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0074] In the description of the embodiments of this application, unless otherwise expressly specified or limited, the terms "connect," "assemble," and "install" should be understood in a broad sense. For example, the term "connect" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0075] The embodiments described herein are exemplary rather than restrictive, and it will be apparent to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described herein. Although many possible feature combinations are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0076] This application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique technical solution defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other technical solutions to form another unique technical solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any appropriate combination. Therefore, the embodiments are not subject to other limitations except for the limitations set forth in the appended claims and their equivalents. In addition, various modifications and changes may be made within the scope of protection of the appended claims.

Claims

1. A discharge valve, characterized in that: It includes a discharge pipe section and a valve plate, wherein the valve plate is arranged at the outlet of the discharge pipe section in an openable and closable manner to open or close the discharge pipe section; The discharge pipe section is a cylindrical pipe section with a spiral blade provided therein; the valve plate is an arc-shaped plate and matches the shape of the outer circumference of the spiral blade; when the valve plate is closed, the inner side surface of the valve plate is arranged opposite to the outer circumference of the spiral blade; The valve plate includes a first blade and a second blade, wherein the first blade and the second blade are assembled to form a complete arc-shaped plate; The discharge valve further includes a first sliding shaft and a second sliding shaft, wherein the first sliding shaft is connected to the first blade, and the second sliding shaft is connected to the second blade; the first sliding shaft and the second sliding shaft respectively drive the first blade and the second blade to move relative to or away from each other, so as to open or close the discharge pipe section; The discharge valve further includes a box body, which is arranged at the outlet of the discharge pipe section and covers the valve plate. The box body is provided with a discharge port; the first sliding shaft and the second sliding shaft are slidably mounted on the box body.

2. The discharge valve according to claim 1, characterized in that: The cross section of the first sliding shaft is non-circular, and / or the cross section of the second sliding shaft is non-circular.

3. The discharge valve according to claim 1, characterized in that: Also included is a first seal disposed between the first blade and the second blade.

4. The discharge valve according to claim 3, characterized in that: The end of the first blade abutting against the second blade is provided with a first sealing surface, and the end of the second blade abutting against the first blade is provided with a second sealing surface; The first sealing surface and the second sealing surface are both stepped surfaces, and the first sealing member is a sealing strip with a stepped cross-section; The first sealing member is fixed on the first sealing surface or the second sealing surface.

5. The discharge valve according to claim 1, characterized in that: The invention also includes a second sealing member located between the first blade and the discharge pipe section, and a third sealing member located between the second blade and the discharge pipe section.

6. The discharge valve according to claim 5, characterized in that: A third sealing surface is provided at one end of the first blade abutting against the discharge pipe section, and a fourth sealing surface is provided at one end of the discharge pipe section abutting against the first blade; the third sealing surface and the fourth sealing surface are both stepped surfaces, and the second sealing member is a sealing strip with a stepped cross-section; the second sealing member is fixed to the third sealing surface or the fourth sealing surface; A fifth sealing surface is provided at one end of the second blade abutting against the discharge pipe section, and a sixth sealing surface is provided at one end of the discharge pipe section abutting against the second blade; the fifth sealing surface and the sixth sealing surface are both stepped surfaces, and the third sealing member is a sealing strip with a stepped cross-section; the third sealing member is fixed on the fifth sealing surface or the sixth sealing surface.

7. The discharge valve according to any one of claims 1 to 6, characterized in that: The central angle corresponding to the valve plate is greater than or equal to 90° and less than or equal to 180°.

8. The discharge valve according to any one of claims 1 to 6, characterized in that: The central angles corresponding to the first blade and the second blade are both 90°.

9. A material conveying device, characterized in that: The material discharging device comprises a conveying body and a discharge valve according to any one of claims 1 to 8, wherein the discharge valve is arranged at the outlet position of the conveying body.

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