Special hard sealing butterfly valve for powder conveying

Abstract

The special hard sealing butterfly valve for powder conveying comprises a rotary adjusting shell, the middles of the front end and the rear end of the rotary adjusting shell are rotationally connected into the shell through a rotary shaft, and feeding and discharging pipes are symmetrically and fixedly connected to the outer sides of the front end and the rear end of the shell; and the number of the butterfly valve mechanisms is at least two, the butterfly valve mechanisms are evenly fixed to the inner portion of the outer side of the rotary adjusting shell, and the main body structure of each butterfly valve mechanism is a butterfly valve shell. According to the integral structure provided by the embodiment of the invention, when the used butterfly valve mechanism is damaged or needs to be maintained, the rotary adjusting shell is rotated by a corresponding angle, so that the butterfly valve mechanism can be conveniently replaced or maintained, and the whole equipment can be replaced or maintained without shutdown; the butterfly valve mechanism is high in internal and external smoothness and suitable for sanitary food media, the valve plate can be separated from a sealing face of the butterfly valve mechanism as long as the valve plate is slightly rotated by an angle during opening, and abrasion-free rotation and low-torque operation of the valve are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of butterfly valves, and in particular to a special hard-sealed butterfly valve for powder conveying. Background Art

[0002] Powder is a general term for powdered solids, and powder involves almost all light and heavy industrial production and manufacturing fields; the valves used for powder cutoff and sealing on traditional powder equipment mainly control the valve plate and the soft sealing valve seat through the valve stem to realize the opening and closing control of the valve. The valve structure is complex, there are sanitary dead corners in the valve, and it is not easy to clean. The friction between the valve plate and the soft sealing valve seat will cause the material of the sealing ring to be rubbed off and pollute the material. At the same time, the long-term friction will greatly reduce the life of the valve. When the valve is damaged or maintained, it needs to be shut down for maintenance, which affects the production of the equipment. Therefore, we proposed a special hard-sealed butterfly valve for powder conveying. Summary of the invention

[0003] The present application provides a special hard-sealed butterfly valve for powder conveying to solve the above-mentioned problems.

[0004] The present application provides a special hard-sealed butterfly valve for powder conveying, comprising: A rotating and adjusting shell, wherein the middle of the front and rear ends of the rotating and adjusting shell are rotatably connected to the inside of the shell through a rotating shaft, and the outer sides of the front and rear ends of the shell are symmetrically fixedly connected with inlet and outlet pipes; A butterfly valve mechanism, wherein at least two butterfly valve mechanisms are provided, and the butterfly valve mechanisms are evenly fixed inside the outer side of the rotary adjustment housing, and the main structure of the butterfly valve mechanism is a butterfly valve housing, and a valve plate is rotatably provided inside the flow cavity of the butterfly valve housing; The inlet end surface of the valve plate is provided with a connection groove, the interior of the connection groove is fixedly connected with a connection housing, the outer end of the connection housing is fixedly connected with an elastic plate, the inner end surface of the elastic plate is fixedly connected with a force equalizing plate, the inner end surface of the force equalizing plate is fixedly connected with a pressure sensor, and the pressure sensor is fixedly connected inside the connection housing; The valve plate is an eccentric valve plate.

[0005] Preferably, an upper shaft connecting groove and a lower shaft connecting groove are symmetrically provided at the upper and lower ends of the valve plate, and the valve stem and the lower shaft are fixedly inserted in the upper shaft connecting groove and the lower shaft connecting groove respectively.

[0006] Preferably, the valve stem is rotatably inserted into a circular hole opened in the middle of the upper side of the butterfly valve housing, a pressure cover is sleeved on the upper outer side of the valve stem, a V-shaped packing is sleeved on the outer side of the valve stem between the pressure cover and the outer limiting ring of the valve stem, and a V-shaped packing upper pad and a V-shaped packing lower pad are respectively provided on the upper and lower sides of the V-shaped packing.

[0007] Preferably, an upper valve plate sealing sleeve is sleeved on the outer side of the valve stem at the lower part of the limiting ring, and the lower part of the upper valve plate sealing sleeve is also inserted into the upper rotating shaft connecting groove.

[0008] Preferably, a lower valve plate sealing sleeve is sleeved on the lower outer side of the lower rotating shaft, a lower sealing plate is connected to the lower end of the lower rotating shaft, a baffle is provided at the lower end of the lower sealing plate, and the four corners of the lower sealing plate and the baffle are fixedly connected to the outside of the butterfly valve housing by bolts.

[0009] Preferably, an O-ring is provided on the lower outer portion of the lower valve plate sealing sleeve between the upper end of the lower sealing plate and the shell of the butterfly valve housing, and the upper outer portion of the lower valve plate sealing sleeve is also inserted into the inner side of the lower shaft connecting groove.

[0010] Preferably, a sealing ring is fixedly embedded and connected to the outer side of the material inlet and outlet of the butterfly valve housing, the diameter of the butterfly valve housing at the material inlet and outlet is equal to the diameter of the inlet and outlet pipes, and the inner wall of the butterfly valve housing at the material inlet and outlet is smooth.

[0011] Preferably, a fixed disk is fixedly connected to the upper portion of the butterfly valve housing, and the fixed disk is fixedly connected to the outer side wall of the rotation adjustment housing via a screw.

[0012] Preferably, a manual disk is fixedly connected to the front end of the middle rotating shaft at the front and rear ends of the rotary adjustment shell, and a positioning rod is elastically connected to the outer side of the manual disk. The plug-in end of the positioning rod is movably plugged into a limiting groove opened on the outer side of the shell, and the number of the limiting grooves is equal to the number of butterfly valve mechanisms.

[0013] Preferably, a support is fixedly connected to the lower end of the shell, and a hollow cavity is opened in the middle of the support.

[0014] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: The overall structure provided by the embodiment of the present application, when the butterfly valve mechanism in use is damaged or needs maintenance, the positioning rod is manually pulled out. Then the manual disk is rotated to drive the rotating adjustment housing to rotate the corresponding angle, so that the butterfly valve mechanism can be easily replaced or maintained, and the entire equipment does not need to be shut down for replacement or maintenance; The butterfly valve mechanism is designed as an integrated sanitary standard. There is no dead angle on the inner wall of the butterfly valve mechanism. It is made by precision machining with all CNC machine tools. It has high internal and external finish and is particularly suitable for sanitary food media. The valve plate is designed and manufactured with a side-mounted integral eccentric design. When opening, the valve plate only needs to be slightly rotated by an angle to separate from the sealing surface of the butterfly valve mechanism, realizing wear-free rotation and low-torque operation of the valve. When closing, the valve plate and the inner cavity of the butterfly valve mechanism are in spherical contact, and the gap is very small, which can easily cut off powder materials and withstand a certain negative pressure. In addition, the surface of the valve plate is polished, with high surface finish and no dead angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the butterfly valve mechanism of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle.

[0018] In the figure: 1. bolt; 2. baffle; 3. lower sealing plate; 4. lower valve plate sealing sleeve; 5. lower shaft connecting groove; 6. lower shaft; 7. valve plate; 8. valve stem; 9. V-type packing lower pad; 10. V-type packing; 11. V-type packing upper pad; 12. gland; 13. O-ring; 14. butterfly valve housing; 15. upper shaft connecting groove; 16. sealing ring; 17. connecting groove; 18. connecting housing; 19. elastic plate; 20. equalizing plate; 21. pressure sensor; 22. fixed plate; 23. butterfly valve mechanism; 24. housing; 25. support; 26. hollow cavity; 27. manual disk; 28. inlet and outlet pipes; 29. ​​rotation adjustment housing; 30. upper valve plate sealing sleeve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0020] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing equipment.

[0021] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc, or abc, where a, b, c can be single or plural, respectively.

[0022] like Figure 1-Figure 3 As shown: The embodiment of the present application provides a special hard-sealed butterfly valve for powder conveying, including: A rotating and adjusting housing 29, wherein the middle of the front and rear ends of the rotating and adjusting housing 29 is rotatably connected to the inside of the housing 24 via a rotating shaft, and the outer sides of the front and rear ends of the housing 24 are symmetrically fixedly connected with the inlet and outlet pipes 28; A butterfly valve mechanism 23, wherein at least two butterfly valve mechanisms 23 are provided, and the butterfly valve mechanisms 23 are evenly fixed inside the outer side of the rotary adjustment housing 29. The main structure of the butterfly valve mechanism 23 is a butterfly valve housing 14, and a valve plate 7 is rotatably provided inside the flow cavity of the butterfly valve housing 14; The inlet end surface of the valve plate 7 is provided with a connection groove 17, the interior of the connection groove 17 is fixedly connected with a connection housing 18, the outer end of the connection housing 18 is fixedly connected with an elastic plate 19, the inner end surface of the elastic plate 19 is fixedly connected with a force equalizing plate 20, the inner end surface of the force equalizing plate 20 is fixedly connected with a pressure sensor 21, and the pressure sensor 21 is fixedly connected inside the connection housing 18; The valve plate 7 is an eccentric valve plate.

[0023] Specifically: the pressure sensor 21 uses an existing sensor on the market, which can detect the pressure borne by the valve plate 7 and detect the pressure of the feed material; When the butterfly valve mechanism 23 is damaged or needs maintenance, the positioning rod is manually pulled out, and then the manual disk 27 is rotated to drive the rotary adjustment housing 29 to rotate a corresponding angle, so that the butterfly valve mechanism 23 can be easily replaced or maintained, and the entire equipment does not need to be shut down for replacement or maintenance.

[0024] like Figure 2 As shown: the upper and lower ends of the valve plate 7 are symmetrically provided with an upper shaft connecting groove 15 and a lower shaft connecting groove 5, and the upper shaft connecting groove 15 and the lower shaft connecting groove 5 are respectively fixedly plugged with the valve stem 8 and the lower shaft 6.

[0025] The valve stem 8 is rotatably inserted into a circular hole opened in the middle of the upper side of the butterfly valve housing 14, and a pressure cover 12 is sleeved on the upper outer side of the valve stem 8. A V-shaped packing 10 is sleeved on the outer side of the valve stem 8 between the pressure cover 12 and the outer limiting ring of the valve stem 8, and a V-shaped packing upper pad 11 and a V-shaped packing lower pad 9 are respectively provided on the upper and lower sides of the V-shaped packing 10.

[0026] Specifically, a V-shaped packing is installed at the step of the valve stem 8, and a pressure cover 12 is installed at the upper end of the V-shaped packing to press the V-shaped packing and the valve stem 8 to ensure the sealing of the upper end of the valve stem 8 and prevent the valve stem 8 from flying out.

[0027] like Figure 2 As shown, an upper valve plate sealing sleeve 30 is sleeved on the outer side of the valve stem 8 at the lower part of the limiting ring, and the lower part of the upper valve plate sealing sleeve 30 is also inserted into the upper shaft connecting groove 15.

[0028] Specifically, the upper valve plate sealing sleeve 30 seals the outer lower portion of the valve stem 8 .

[0029] like Figure 2As shown: the lower outer side of the lower rotating shaft 6 is sleeved with a lower valve plate sealing sleeve 4, the lower end of the lower rotating shaft 6 is connected to a lower sealing plate 3, the lower end of the lower sealing plate 3 is provided with a baffle 2, and the four corners of the lower sealing plate 3 and the baffle 2 are fixedly connected to the outer side of the butterfly valve housing 14 by bolts 1.

[0030] Specifically, the lower end of the valve plate 7 is connected to the lower rotating shaft 6, the lower part of the lower rotating shaft 6 is wrapped by the lower valve plate sealing sleeve 4, and the lower end of the lower rotating shaft 6 is supported by the sealing plate 3 and the baffle 2 to ensure the sealing of the lower end.

[0031] like Figure 2 As shown: an O-ring 13 is provided on the lower outer portion of the lower valve plate sealing sleeve 4 between the upper end of the lower sealing plate 3 and the shell of the butterfly valve shell 14, and the upper outer portion of the lower valve plate sealing sleeve 4 is also inserted into the inner side of the lower shaft connecting groove 5.

[0032] Specifically, the O-ring 13 can increase the sealing degree of the lower valve plate sealing sleeve 4 .

[0033] like Figure 2 As shown: the butterfly valve housing 14 is fixedly inlaid with a sealing ring 16 on the outside of the material inlet and outlet. The diameter of the butterfly valve housing 14 at the material inlet and outlet is equal to the diameter of the inlet and outlet pipe 28, and the inner wall of the butterfly valve housing 14 at the material inlet and outlet is smooth.

[0034] Specifically, the sealing ring 16 can increase the sealing degree between the outer side of the material inlet and outlet of the butterfly valve mechanism 23 and the inner side wall of the housing 24 .

[0035] like Figure 2 As shown, a fixed plate 22 is fixedly connected to the upper part of the butterfly valve housing 14, and the fixed plate 22 is fixedly connected to the outer side wall of the rotation adjustment housing 29 through a screw.

[0036] Specifically, the fixed disk 22 can be fixedly connected to the outer wall of the rotation adjustment housing 29 , and can be positioned and fixedly connected to the butterfly valve mechanism 23 .

[0037] like Figure 1 As shown: a manual disk 27 is fixedly connected to the front end of the rotating shaft in the middle of the front and rear ends of the rotating adjustment shell 29, and a positioning rod is elastically connected to the outer side of the manual disk 27. The plug-in end of the positioning rod is movably plugged into the limiting groove opened on the outer side of the shell 24, and the number of the limiting grooves is equal to the number of the butterfly valve mechanisms 23.

[0038] Specifically, the manual disk 27 can conveniently rotate the shaft to rotate the rotation adjustment housing 29, and the outer front side of the positioning rod is sleeved with a spring, which is in a stretched state.

[0039] like Figure 1 As shown, a support 25 is fixedly connected to the lower end of the shell 24 , and a hollow cavity 26 is opened in the middle of the support 25 .

[0040] Specifically, the hollow cavity 26 passes through the connection structure of the outer end of the butterfly valve mechanism 23 , that is, when the butterfly valve mechanism 23 rotates with the rotation adjustment housing 29 , it can pass through the hollow cavity 26 .

[0041] Principle of use: When the equipment is in use, the inlet and outlet pipes 28 are connected to the external pipes, and then the manual disk 27 is rotated to make the inlet and outlet of one of the butterfly valve mechanisms 23 overlap with the inlet and outlet pipes 28. When the butterfly valve mechanism 23 in use is damaged or needs maintenance, the positioning rod is manually pulled out. Then the manual disk 27 is rotated to drive the rotary adjustment housing 29 to rotate the corresponding angle, so that the butterfly valve mechanism 23 can be easily replaced or maintained, and the entire equipment does not need to be shut down for replacement or maintenance; The butterfly valve mechanism 23 adopts a quick-install connection method for easy installation and disassembly. The upper end of the valve stem 8 can be equipped with an electric actuator or a pneumatic actuator. A valve plate 7 is installed in the center of the butterfly valve mechanism 23. The lower end of the valve plate 7 is connected to the lower shaft 6. The lower part of the lower shaft 6 is wrapped by the lower valve plate sealing sleeve 4. The lower end of the lower shaft 6 is supported by the sealing plate 3 and the baffle 2 to ensure the sealing of the lower end; the upper end of the valve plate 7 is connected to the valve stem 8, and a V-shaped packing is installed at the step of the valve stem 8. The upper end of the V-shaped packing is a gland 12, which presses the V-shaped packing and the valve stem 8 to ensure the sealing of the upper end of the valve stem 8 and prevent the valve stem 8 from flying out. Compared with the existing soft-sealed butterfly valve or expansion butterfly valve, it has the advantages of simple structure, small opening and closing torque, full diameter, no sanitary dead angle and easy cleaning. The main feature is that the butterfly valve mechanism 23 is an integrated sanitary standard design, the inner wall of the butterfly valve mechanism 23 has no dead angle, and is made by precision machining of all CNC machine tools. The inner and outer surfaces have high finish, and are particularly suitable for sanitary food media. The valve plate 7 is made of a side-mounted integral eccentric design. When opening, the valve plate 7 only needs to be slightly rotated by an angle, and the valve plate 7 can be separated from the sealing surface of the butterfly valve mechanism 23, thereby realizing wear-free rotation and low-torque operation of the valve. When closed, the valve plate 7 is in spherical contact with the inner cavity of the butterfly valve mechanism 23, and the gap is very small, which can easily cut off powder materials and can withstand a certain negative pressure. In addition, the surface of the valve plate 7 is polished, with high surface finish and no dead angle. In summary, the entire butterfly valve mechanism 23 can meet sanitary standards.

[0042] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for by the present application.

Claims

1. A special hard-sealed butterfly valve for powder conveying, characterized in that: include: A rotating adjustment shell (29), wherein the middle of the front and rear ends of the rotating adjustment shell (29) are rotatably connected to the inside of the shell (24) via a rotating shaft, and the outer sides of the front and rear ends of the shell (24) are symmetrically fixedly connected to the inlet and outlet pipes (28); A butterfly valve mechanism (23), wherein at least two butterfly valve mechanisms (23) are provided, and the butterfly valve mechanisms (23) are evenly fixed inside the outer side of the rotary adjustment housing (29); the main structure of the butterfly valve mechanism (23) is a butterfly valve housing (14), and a valve plate (7) is rotatably provided inside the flow chamber of the butterfly valve housing (14); The inlet end surface of the valve plate (7) is provided with a connection groove (17), the interior of the connection groove (17) is fixedly connected to a connection housing (18), the outer end of the connection housing (18) is fixedly connected to an elastic plate (19), the inner end surface of the elastic plate (19) is fixedly connected to a force equalizing plate (20), the inner end surface of the force equalizing plate (20) is fixedly connected to a pressure sensor (21), and the pressure sensor (21) is fixedly connected to the interior of the connection housing (18); The valve plate (7) is an eccentric valve plate.

2. A special hard-sealed butterfly valve for powder conveying according to claim 1, characterized in that: An upper shaft connecting groove (15) and a lower shaft connecting groove (5) are symmetrically provided at the upper and lower ends of the valve plate (7), and a valve stem (8) and a lower shaft (6) are fixedly inserted into the upper shaft connecting groove (15) and the lower shaft connecting groove (5), respectively.

3. A special hard-sealed butterfly valve for powder conveying according to claim 2, characterized in that: The valve stem (8) is rotatably inserted into a circular hole opened in the middle of the upper side of the butterfly valve housing (14); a gland (12) is sleeved on the upper outer side of the valve stem (8); a V-shaped packing (10) is sleeved on the outer side of the valve stem (8) between the gland (12) and the outer limiting ring of the valve stem (8); and a V-shaped packing upper pad (11) and a V-shaped packing lower pad (9) are respectively provided on the upper and lower sides of the V-shaped packing (10).

4. A special hard-sealed butterfly valve for powder conveying according to claim 2, characterized in that: An upper valve plate sealing sleeve (30) is sleeved on the lower part of the limit ring on the outer side of the valve stem (8), and the lower part of the upper valve plate sealing sleeve (30) is also inserted into the upper shaft connecting groove (15).

5. A special hard-sealed butterfly valve for powder conveying according to claim 2, characterized in that: A lower valve plate sealing sleeve (4) is sleeved on the lower outer portion of the lower rotating shaft (6), a lower sealing plate (3) is connected to the lower end of the lower rotating shaft (6), a baffle (2) is provided at the lower end of the lower sealing plate (3), and the four corners of the lower sealing plate (3) and the baffle (2) are fixedly connected to the outer side of the butterfly valve housing (14) by bolts (1).

6. A special hard-sealed butterfly valve for powder conveying according to claim 5, characterized in that: An O-ring (13) is provided on the lower outer portion of the lower valve plate sealing sleeve (4) between the upper end of the lower sealing plate (3) and the shell of the butterfly valve shell (14), and the upper outer portion of the lower valve plate sealing sleeve (4) is also inserted into the inner side of the lower shaft connecting groove (5).

7. A special hard-sealed butterfly valve for powder conveying according to claim 1, characterized in that: The butterfly valve housing (14) is fixedly inlaid with a sealing ring (16) on the outside of the material inlet and outlet. The diameter of the butterfly valve housing (14) at the material inlet and outlet is equal to the diameter of the inlet and outlet pipe (28). The inner wall of the material inlet and outlet of the butterfly valve housing (14) is smooth.

8. The special hard-sealed butterfly valve for powder conveying according to claim 1 is characterized in that: A fixed disk (22) is fixedly connected to the upper portion of the butterfly valve housing (14), and the fixed disk (22) is fixedly connected to the outer side wall of the rotary adjustment housing (29) via a screw.

9. The special hard-sealed butterfly valve for powder conveying according to claim 1, characterized in that: A manual disk (27) is fixedly connected to the front end of the rotating shaft in the middle of the front and rear ends of the rotating adjustment housing (29); a positioning rod is elastically connected to the outer side of the manual disk (27); the plug-in end of the positioning rod is movably plugged into a limiting groove provided on the outer side of the housing (24); the number of the limiting grooves is equal to the number of the butterfly valve mechanisms (23).

10. The special hard-sealed butterfly valve for powder conveying according to claim 1, characterized in that: A support (25) is fixedly connected to the lower end of the shell (24), and a hollow cavity (26) is formed in the middle of the support (25).

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