Discharging valve

Abstract

The utility model discloses a blanking valve which comprises a shell and a valve core, the valve core is rotatably arranged in the shell, the shell is provided with a feed port and a discharge port, the valve core is provided with a plurality of material containing cavities, and elastic sealing pieces which are rotatably sealed with the shell are arranged among the plurality of material containing cavities. A tensioning ring and a sealing ring connected with the shell in a sealed mode are arranged at the end of the material containing cavity, the tensioning ring is sleeved with the sealing ring, and a guide inclined face is arranged between the tensioning ring and the sealing ring. The sealing capacity between the valve element and the shell can be greatly improved, the material containing cavity is only communicated with the feeding port and the discharging port, high sealing of the valve element is achieved, high sealing capacity can be achieved under the application of upstream normal pressure and downstream high temperature and high pressure, and the purpose of positive pressure feeding is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, and particularly relates to a blanking valve. Background Art

[0002] The rotary blanking valve drives an impeller with an equidistant structure to rotate in a shell through the transmission of a motor and a speed reducer. The materials in the upper bin or feeding device of the shell are filled in the cavities of the impeller, and the materials are discharged to the lower part of the shell along with the rotation of the impeller.

[0003] It is very difficult for the current rotary blanking valve to achieve high tightness. Especially when the upstream is at normal pressure and the downstream is at high pressure, leakage and material return are likely to occur, and it is difficult to convey materials to high pressure. Therefore, how to ensure the tightness during the rotation of the valve core is a technical problem that the utility model urgently needs to solve. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a blanking valve, which solves the problem of how to ensure the tightness during the rotation of the valve core in the prior art.

[0005] The utility model is realized as follows: a blanking valve includes a shell and a valve core. The valve core is rotatably arranged in the shell. The shell is provided with a feed inlet and a discharge outlet. The valve core is provided with a plurality of material-containing cavities. An elastic sealing member that is rotationally sealed with the shell is arranged between the plurality of material-containing cavities. A tension ring and a sealing ring that is sealingly connected to the shell are arranged at the end of the material-containing cavity. The sealing ring is sleeved on the tension ring, and a guiding inclined surface is arranged between the tension ring and the sealing ring.

[0006] Materials enter the material-containing cavities of the valve core from the feed inlet. Through the rotation of the valve core, the materials move towards the discharge outlet direction, and then the materials complete blanking along the discharge outlet. In this process, since the valve core needs to rotate, it is very difficult to achieve the seal between the material-containing cavity and the shell. Therefore, in the case where there is a pressure difference between the feed inlet and the discharge outlet, there may be material return or leakage during the blanking process. To solve this technical problem, the utility model is provided with an elastic sealing member that is rotationally sealed with the shell between the material-containing cavities, so that during the rotation of the valve core, due to the elastic action of the elastic sealing member, it always contacts and seals with the inner wall. Moreover, a tension ring and a sealing ring that is sealingly connected to the shell are arranged at the end of the material-containing cavity. At the same time, a guiding inclined surface is arranged between the tension ring and the sealing ring. The tension ring can give an inclined pressure to the sealing ring through the guiding inclined surface, so that the sealing ring expands, and the sealing ring continuously seals between the end of the material-containing cavity and the inner wall of the shell. In summary, the utility model can achieve the tightness of the material-containing cavity during the rotation of the valve core, avoid the leakage or return of the materials in the material-containing cavity during the rotation of the valve core, and ensure the smooth blanking of the blanking valve.

[0007] The elastic seal between the material-containing cavities, in cooperation with the tensioning ring, the sealing ring, and the guiding inclined surface at the end of the material-containing cavity, forms a circumferential seal, which can greatly improve the sealing ability between the valve core and the housing, enabling the material-containing cavity to communicate only with the feed port and the discharge port, achieving a high seal of the valve core. It can also have a high sealing ability under the application of normal pressure upstream and high temperature and high pressure downstream, achieving the purpose of positive pressure feeding.

[0008] A further technical solution of the present utility model is that the guiding inclined surface is provided on the tensioning ring.

[0009] When the guiding inclined surface is provided on the tensioning ring, the structural design is more reasonable; when the tensioning ring is stressed during the rotation of the valve core, the force can be smoothly transmitted to the sealing ring through the guiding inclined surface, enabling the sealing ring to deform and always seal between the end of the material-containing cavity and the inner wall of the housing.

[0010] A further technical solution of the present utility model is that the tensioning ring is elastically provided along the axial direction of the valve core rotation.

[0011] The tensioning ring is elastically provided in the axial direction of the valve core rotation. The tensioning ring is subjected to a continuous axial pressure, and the pressure is continuously transmitted to the sealing ring through the guiding inclined surface. Thus, during the rotation of the valve core, the sealing ring can also continuously seal between the end of the material-containing cavity and the housing.

[0012] A further technical solution of the present utility model is that a groove for accommodating the elastic seal is provided on the valve core. The elastic seal includes a spring, a connecting member, and a sealing rotating piece connected in sequence from the inside to the outside, and the sealing rotating piece is in sealing cooperation with the housing.

[0013] During the rotation of the valve core, the spring in the elastic seal continuously applies pressure to the sealing rotating piece through the connecting member, enabling the sealing rotating piece to always contact the inner wall of the housing and ensuring the sealing performance between the material-containing cavities.

[0014] A further technical solution of the present utility model is that the end of the connecting member is snapped into the tensioning ring and can move along the direction perpendicular to the axial direction of the valve core rotation.

[0015] The end of the connecting member is snapped into the tensioning ring. When replacing the sealing rotating piece, the connecting member and the spring will not come out. Only the sealing rotating piece needs to be replaced. Moreover, the connecting member can move along the direction perpendicular to the axial direction of the valve core rotation, and the connecting member can continuously apply pressure to the rotating elastic piece through the spring.

[0016] A further technical solution of the present utility model is that one end of the valve core is connected with a bearing seat, and the other end is connected with a driver. End sealing assemblies are provided between the housing and the bearing seat and between the housing and the driver.

[0017] The driver drives the valve core to rotate, and end sealing assemblies are provided at both ends of the valve core, further ensuring the overall sealing performance of the valve core.

[0018] A further technical solution of the present utility model is that the end sealing assembly includes a sealing ring, a mounting seat and a sealing ring gland. The mounting seat is sleeved on the rotating shaft at the end of the valve core. The sealing rings are multiple and are arranged between the mounting seat and the rotating shaft. The end of the sealing ring gland passes through the mounting seat for axially fixing the sealing rings along the rotating shaft.

[0019] The sealing ring is sleeved on the rotating shaft at the end of the valve core. An outer periphery of the sealing ring is provided with a mounting seat, and one end is provided with a sealing ring gland that can be inserted into the mounting seat and abuts against the sealing ring. Under the action of the mounting seat and the sealing ring gland, a sealed installation of the sealing ring is realized.

[0020] A further technical solution of the present utility model is that a cleaning port for connecting the area between the valve core and the sealing ring to the outside is provided on the mounting seat.

[0021] It is difficult to clean the existing rotary feeding valve, and it is very difficult to perform on-line cleaning. In the present utility model, there is a cleaning and purging port on the mounting seat of the sealing ring to clean the area between the valve core and the sealing ring, preventing dust from accumulating at the sealing ring, which can effectively reduce the wear of the sealing ring.

[0022] A further technical solution of the present utility model is that a cleaning and pressure relief port is provided on the housing.

[0023] There is a cleaning and pressure relief port on the housing. When the downstream is at high pressure, the pressure in the material-containing cavity can be released through the cleaning and pressure relief port, and the upstream material can more easily enter the material-containing cavity, and it can also reduce the dust caused by back pressure. The cleaning and pressure relief port can also be used for cleaning the valve core. Cleaning water can be passed through the cleaning and pressure relief port to perform on-line cleaning of the valve core, eliminating the need for disassembly and cleaning of the valve core; the cleaning and pressure relief port can also be connected to a pressurized gas to purge the material-containing cavity during the feeding process, eliminating the need for material accumulation in the area between the material-containing cavities and improving the feeding efficiency.

[0024] The beneficial effects of the present utility model: The present utility model is provided with an elastic sealing member that is rotationally sealed with the housing between the material-containing cavities. When the valve core rotates, due to the elastic action of the elastic sealing member, it always contacts and seals with the inner wall; moreover, a tension ring and a sealing ring that is sealingly connected to the housing are provided at the end of the material-containing cavity. At the same time, a guiding inclined surface is provided between the tension ring and the sealing ring. The tension ring can give an oblique pressure to the sealing ring through the guiding inclined surface, causing the sealing ring to expand. The sealing ring will continuously seal between the end of the material-containing cavity and the inner wall of the housing. In summary, the present utility model can achieve the sealing performance of the material-containing cavity during the rotation of the valve core, avoiding the leakage or backflow of the material in the material-containing cavity during the rotation of the valve core, and ensuring the smooth feeding of the feeding valve.

[0025] The valve core and the sealing ring of the present utility model can be cleaned on-line, which better meets the requirements of pharmaceutical production. Description of the Drawings

[0026] Figure 1 It is a schematic structural view of a blanking valve provided by the present utility model;

[0027] Figure 2 It is a sectional view in the direction of the parallel rotating shaft provided by the present utility model;

[0028] Figure 3 It is an enlarged view at position A provided by the present utility model;

[0029] Figure 4 It is a schematic structural view of the valve core provided by the present utility model;

[0030] Figure 5 It is a sectional view in the direction of the vertical rotating shaft provided by the present utility model;

[0031] Figure 6 It is a sectional view in the direction of the parallel rotating shaft provided by the present utility model.

[0032] Reference numerals: 1. housing, 11. feed inlet, 12. discharge outlet, 13. pressure relief port,

[0033] 2. valve core, 21. material containing cavity, 22. rotating shaft,

[0034] 3. elastic seal, 31. spring, 32. connecting member, 33. sealing rotating vane,

[0035] 4. tensioning ring, 41. guiding inclined surface, 42. disc spring, 43. screw,

[0036] 5. sealing ring, 6. driver, 7. bearing seat,

[0037] 8. sealing assembly, 81. sealing ring, 82. mounting seat, 83. sealing ring gland, 84. cleaning port. Detailed implementation manners

[0038] The following illustrates the implementation manners of the present utility model through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.

[0039] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present utility model can generate and the purpose that can be achieved, should still fall within the scope that the technical content disclosed by the present utility model can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the implementation scope of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present utility model can implement.

[0040] Embodiment 1:

[0041] Figures 1-6 A blanking valve is shown, including a housing 1 and a valve core 2. The valve core 2 is rotatably arranged in the housing 1. The housing 1 is provided with a feed port 11 and a discharge port 12. The valve core 2 is provided with a plurality of material receiving cavities 21. An elastic sealing member 3 that is rotationally sealed with the housing 1 is arranged between the plurality of material receiving cavities 21. A tensioning ring 4 and a sealing ring 5 that is sealingly connected to the housing 1 are arranged at the end of the material receiving cavity 21. The sealing ring 5 is sleeved on the tensioning ring 4. A guiding inclined surface 41 is arranged between the tensioning ring 4 and the sealing ring 5.

[0042] In this embodiment, the guiding inclined surface 41 is arranged on the tensioning ring 4.

[0043] The guiding inclined surface is arranged on the tensioning ring, and the structural design is more reasonable; when the tensioning ring is stressed during the rotation of the valve core, it can smoothly transfer the force to the sealing ring through the guiding inclined surface, so that the sealing ring deforms and is always sealed between the end of the material receiving cavity and the inner wall of the housing.

[0044] In this embodiment, a guiding inclined surface is arranged on the side of the tensioning ring facing the material receiving cavity. A sealing ring is arranged between the guiding inclined surface and the end of the material receiving cavity of the valve core. When the tensioning ring is stressed, the cross-section of the sealing ring will be increased through the guiding inclined surface. At the same time, due to the oblique pressure received by the sealing ring, the sealing ring is always sealed between the end of the material receiving cavity and the inner wall of the housing.

[0045] In this embodiment, the tensioning ring is sleeved on the rotating shaft 22 at the end of the valve core. A screw 43 that passes through the tensioning ring and is connected to the valve core is arranged on the tensioning ring. A disc spring 42 is arranged between the screw 43 and the tensioning ring. The disc spring will provide continuous pressure to the tensioning ring. The inclined surface on the tensioning ring will expand the sealing ring, so that the sealing ring will continuously press on the inner wall of the housing to ensure the sealing between the end of the material receiving cavity and the housing.

[0046] In this embodiment, the tension ring 4 is elastically arranged along the rotation axis of the valve core 2.

[0047] A tension ring is elastically arranged along the rotation axis of the valve core. The tension ring is subjected to a continuous axial pressure, and the pressure is continuously transmitted to the sealing ring through the guiding inclined surface, so that during the rotation of the valve core, the sealing ring can also continuously seal between the end of the material-containing cavity and the housing.

[0048] In this embodiment, the tension ring and the sealing ring form a circumferential sealing structure on the valve core; the tension ring is elastically arranged along the rotation axis of the valve core, so that the tension ring will provide a continuous pressure to the sealing ring, and the guiding inclined surface will expand the sealing ring, so that the sealing ring will continuously press between the end of the material-containing cavity and the inner wall of the housing, thereby realizing the circumferential sealing of the valve core during rotation.

[0049] In this embodiment, a tension ring is sleeved on the rotating shaft 22 at the end of the valve core. The tension ring is connected to the valve core by a screw 43, and a disc spring 42 is arranged between the screw and the tension ring. The disc spring will provide a continuous pressure to the tension ring, and the inclined surface on the tension ring will expand the sealing ring, so that the sealing ring will continuously press on the inner wall of the housing. The sealing ring is made of wear-resistant elastic material, and even general wear will not cause leakage, so that the dimensional sealing can be realized.

[0050] In this embodiment, the tension ring is sleeved on the rotating shaft at the end of the valve core, and a sealing member is arranged between the tension ring and the rotating shaft.

[0051] In this embodiment, a groove for accommodating the elastic sealing member 3 is formed on the valve core 2. The elastic sealing member 3 includes a spring 31, a connecting member 32 and a sealing rotating piece 33 which are connected in sequence from the inside to the outside, and the sealing rotating piece 33 is in sealing cooperation with the housing 1.

[0052] During the rotation of the valve core, the spring in the elastic sealing member gives a continuous pressure to the sealing rotating piece through the connecting member, so that the sealing rotating piece always contacts the inner wall of the housing, ensuring the sealing between the material-containing cavities.

[0053] In this embodiment, a material-containing cavity is formed between the teeth on the valve core. There is an elastic sealing member for rotary sealing with the housing on the tooth top of the valve core. The sealing rotating piece is pressed on the inner wall of the housing by the spring, ensuring that the sealing is always effective; the sealing rotating piece is made of elastic wear-resistant material and can withstand long-term wear, and general wear will not cause the sealing to fail; the connecting member is made of stainless steel and both ends of the connecting member will be inserted into the tension ring. When the valve core is removed to replace the sealing rotating piece, the connecting member will not come out and the spring will not fall out, so it is convenient to replace the sealing rotating piece, solving the problem that the existing sealing member has a low service life due to wear and needs to be replaced frequently.

[0054] In this embodiment, the end of the connecting member 32 is snapped into the tension ring 4 and can move along the direction perpendicular to the rotation axis of the valve core 2.

[0055] The end of the connecting piece is snapped into the tensioning ring, so that the connecting piece and the spring will not come out when replacing the sealing rotating vane. Only the sealing rotating vane needs to be replaced. Moreover, the connecting piece can move axially perpendicular to the rotation of the valve core, and the connecting piece can apply continuous pressure to the rotating vane through the spring.

[0056] In this embodiment, one end of the valve core 2 is connected to a bearing seat 7, and the other end is connected to a driver 6. End sealing assemblies 8 are provided between the housing 1 and the bearing seat 7 and between the housing 1 and the driver 6.

[0057] The driver drives the valve core to rotate, and end sealing assemblies are provided at both ends of the valve core to further ensure the overall sealing of the valve core.

[0058] In this embodiment, the end sealing assembly 8 includes a sealing ring 81, a mounting seat 82 and a sealing ring gland 83. The mounting seat 82 is sleeved on the rotating shaft at the end of the valve core 2. There are multiple sealing rings 81 disposed between the mounting seat 82 and the rotating shaft. The end of the sealing ring gland 83 passes through the mounting seat 82 to axially fix the sealing ring 81 along the rotating shaft.

[0059] The sealing ring is sleeved on the rotating shaft 22 at the end of the valve core. An outer periphery of the sealing ring is provided with a mounting seat, and one end is provided with a sealing ring gland that can be inserted into the mounting seat and abuts against the sealing ring. Under the action of the mounting seat and the sealing ring gland, the sealing installation of the sealing ring is realized.

[0060] In this embodiment, there are multiple sealing rings at both ends of the valve core. The sealing ring is fastened by the sealing ring gland on the mounting seat and the valve core. When leakage occurs, the sealing ring gland can be tightened again to improve the sealing ability.

[0061] In this embodiment, the mounting seat 82 is provided with a cleaning port 84 for connecting the area between the valve core 2 and the sealing ring 81 to the outside.

[0062] For the existing rotary blanking valve, cleaning is relatively difficult and it is very hard to achieve on-line cleaning. In the present utility model, the mounting seat of the sealing ring is provided with a cleaning and purging port for cleaning the area between the valve core and the sealing ring to prevent dust from accumulating at the sealing ring, thereby effectively reducing the wear of the sealing ring.

[0063] In this embodiment, the space between the mounting seat and the tensioning ring is communicated with the cleaning port. The cleaning ports are multiple and symmetrically arranged relative to the rotating shaft 22.

[0064] In this embodiment, the housing 1 is provided with a cleaning and pressure relief port 13.

[0065] There is a cleaning and pressure relief port on the housing. When there is high pressure downstream, the pressure in the material holding cavity can be released through the cleaning and pressure relief port, making it easier for the upstream material to enter the material holding cavity and reducing the dust generated by backpressure. The cleaning and pressure relief port can also be used for cleaning the valve core. Cleaning water can be passed through it to clean the valve core online, eliminating the need for disassembly and cleaning of the valve core. The cleaning and pressure relief port can also be connected to pressurized gas to purge the material holding cavity during the feeding process, preventing material accumulation in the area between the material holding cavities and improving the feeding efficiency.

[0066] In this embodiment, the cleaning and pressure relief port is connected to the inside of the housing. There are two cleaning and pressure relief ports, which are arranged along the extension direction of the material holding cavity. One is the cleaning and pressure relief inlet, and the other is the cleaning and pressure relief outlet.

[0067] In this embodiment, the feed port and the discharge port are symmetrically arranged on the housing.

[0068] The working principle of the present utility model: The material enters the material holding cavity of the valve core from the feed port. Through the rotation of the valve core, the material moves towards the discharge port direction, and then the material completes the feeding along the discharge port. In this process, since the valve core needs to rotate, it is difficult to achieve a perfect seal between the material holding cavity and the housing. Therefore, in the case of a pressure difference between the feed port and the discharge port, there may be situations of material backflow or leakage during the feeding process. To solve this technical problem, the present utility model is provided with an elastic seal that rotates and seals with the housing between the material holding cavities. During the rotation of the valve core, due to the elastic effect of the elastic seal, it always contacts and seals with the inner wall. Moreover, a tension ring and a sealing ring that are hermetically connected to the housing are provided at the end of the material holding cavity. At the same time, a guiding inclined surface is provided between the tension ring and the sealing ring. The tension ring can give the sealing ring an oblique pressure through the guiding inclined surface, causing the sealing ring to expand. The sealing ring will continuously seal between the end of the material holding cavity and the inner wall of the housing. In summary, the present utility model can achieve the sealing of the material holding cavity during the rotation of the valve core, prevent the material in the material holding cavity from leaking or backflowing during the rotation of the valve core, and ensure the smooth feeding of the feeding valve.

[0069] The circumferential seal formed by the elastic seal between the material holding cavities in cooperation with the tension ring, the sealing ring, and the guiding inclined surface at the end of the material holding cavity can greatly improve the sealing ability between the valve core and the housing, making the material holding cavity only communicate with the feed port and the discharge port, achieving a high degree of sealing of the valve core. It can also have a high sealing ability under the application of normal pressure upstream and high temperature and high pressure downstream, achieving the purpose of positive pressure feeding.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A blanking valve, comprising a housing (1) and a valve core (2), the valve core (2) is rotatably arranged in the housing (1), the housing (1) is provided with a feed inlet (11) and a discharge outlet (12), and the valve core (2) is provided with a plurality of material containing cavities (21), characterized in that, An elastic seal (3) that rotates and seals with the housing (1) is provided between multiple material chambers (21). A tensioning ring (4) and a sealing ring (5) that is sealingly connected to the housing (1) are provided at the end of the material chamber (21). The sealing ring (5) is sleeved on the tensioning ring (4), and a guiding inclined surface (41) is provided between the tensioning ring (4) and the sealing ring (5).

2. The blanking valve according to claim 1, wherein, The guiding inclined surface (41) is provided on the tensioning ring (4).

3. The blanking valve according to claim 1, characterized in that, The tensioning ring (4) is elastically arranged along the rotation axis of the valve core (2).

4. The blanking valve according to claim 1, wherein, A groove for accommodating the elastic seal (3) is formed on the valve core (2). The elastic seal (3) includes a spring (31), a connecting member (32), and a sealing rotating piece (33) that are connected in sequence from the inside out. The sealing rotating piece (33) is in sealing cooperation with the housing (1).

5. A blanking valve according to claim 4, characterized in that, The end of the connecting member (32) is snapped into the tensioning ring (4) and can move along the direction perpendicular to the rotation axis of the valve core (2).

6. The blanking valve according to claim 1, characterized in that, One end of the valve core (2) is connected to a bearing seat (7), and the other end is connected to a driver (6). End sealing assemblies (8) are provided between the housing (1) and the bearing seat (7) and between the housing (1) and the driver (6).

7. The blanking valve according to claim 6, characterized in that, The end sealing assembly (8) includes a sealing ring (81), a mounting seat (82), and a sealing ring gland (83). The mounting seat (82) is sleeved on the rotating shaft at the end of the valve core (2). A plurality of sealing rings (81) are arranged between the mounting seat (82) and the rotating shaft. The end of the sealing ring gland (83) passes through the mounting seat (82) to axially fix the sealing ring (81) along the rotating shaft.

8. A blanking valve according to claim 7, characterized in that A cleaning port (84) for connecting the area between the valve core (2) and the sealing ring (81) to the outside is provided on the mounting seat (82).

9. The blanking valve according to claim 1, characterized in that, A cleaning and pressure relief port (13) is provided on the housing (1).

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