A discharge valve
By combining an eccentric rotating shaft structure with an air blowing device, the problems of sealing surface wear, opening and closing jamming, and material residue in traditional discharge valves for handling powder or high-viscosity materials are solved. This achieves high-efficiency sealing reliability and automatic cleaning, improving the stability of equipment operation and ease of maintenance.
Patent Information
- Application Number
- CN202522500552.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-25
AI Technical Summary
Traditional discharge valves suffer from problems such as wear on the sealing surface and high opening and closing resistance when handling powders or high-viscosity materials, material residue and blockage due to agglomeration, and lack of online purging function, resulting in poor sealing reliability, poor opening and closing, and difficult maintenance.
The valve core design adopts an eccentric rotating shaft structure, combined with the drive of a linear cylinder and an eccentric rotating cylinder. The valve core and valve seat form a hard sealing surface, and an air blowing device is equipped to remove residual materials before the valve core closes. It is designed to be flush with the reactor cavity to reduce residual space.
It effectively reduces friction and wear between the valve core and valve seat, lowers opening and closing resistance, achieves automatic cleaning, prevents material residue and blockage, improves sealing reliability and smooth opening and closing, and reduces maintenance frequency and cost.
Smart Images
Figure CN224932266U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of valve technology, specifically relating to a discharge valve. Background Technology
[0002] In the chemical, pharmaceutical, and food industries, high-performance discharge valves are often required at the discharge ports of reaction vessels, mixing tanks, or conveying systems to achieve precise, controllable, and leak-free material discharge. Traditional discharge valves mostly employ straight-through ball valves, butterfly valves, or gate valves, which have many inherent drawbacks when handling powders or high-viscosity materials.
[0003] High wear on sealing surfaces and high opening and closing resistance: The valve core and valve seat of traditional valves are designed as a coaxial center. During the opening and closing process, the valve core directly scrapes the sealing surface of the valve seat, which leads to rapid wear of the sealing material. Especially in the case of particulate matter or high hardness materials, the sealing life is significantly shortened. At the same time, the material accumulates in the valve cavity to form a "dead zone", which causes the resistance to increase sharply in the initial opening of the valve, or even jamming, which seriously affects the automated operation of the equipment.
[0004] Material residue and clumping blockage: Existing valves generally lack an effective self-cleaning mechanism for the cavity. Material remains on the inner wall of the valve cavity and in the gap between the valve core and the valve seat. After being exposed to high temperatures or left to stand for a long time, it is prone to solidification and clumping, blocking the flow channel and causing poor or complete blockage of subsequent discharge. This requires frequent manual cleaning, increasing downtime and maintenance costs.
[0005] Lack of online purging function: Very few existing valves integrate purging devices, making it impossible to clean the valve cavity immediately after discharge. This results in residual material contaminating the next batch of products or causing cross-contamination, which does not meet the cleanliness requirements of modern continuous production.
[0006] In summary, existing discharge valve technology has significant shortcomings in terms of sealing reliability, anti-clogging ability, smooth opening and closing, and ease of maintenance. There is an urgent need for a new type of discharge valve that integrates multiple innovative structures to solve the above-mentioned technical bottlenecks. Utility Model Content
[0007] Purpose of the utility model: The purpose of this utility model is to provide a discharge valve to solve the technical problems mentioned in the background art.
[0008] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a discharge valve, comprising a valve body, one end of which is connected to the reactor cavity, and the other end being a material outlet; a valve seat, fixed within the valve body, the inner surface of which is flush with the reactor cavity; characterized in that:
[0009] The valve core is rotatably mounted inside the valve seat, forming a hard seal with the valve seat when closed;
[0010] An eccentric rotating shaft is installed in a bearing seat at the top of the valve body. The eccentric rotating shaft is fixedly connected to the valve core, and its rotation center has an eccentric distance relative to the center of the valve core sealing surface.
[0011] A long eccentric swing arm, one end of which is mounted on an eccentric rotating shaft, and the other end is mounted on a straight piston of a linear stroke cylinder. The linear stroke cylinder is mounted on the valve body. A sealing gasket is provided between the rear end of the valve core and the valve body. The linear stroke cylinder drives the straight piston to move along the axial direction of the valve core, applying a locking force to the valve core to compress the sealing gasket and enhance the hard seal pressure.
[0012] An eccentric rotary cylinder is mounted on a valve core and is used to drive the valve core to move along an eccentric trajectory.
[0013] The air blowing device includes multiple air blowing nozzles arranged around the outer edge of the valve core, used to spray clean gas onto the sealing surface between the valve core and the valve seat to remove residual materials before the valve core is closed.
[0014] Furthermore: the transition area between the valve seat and the reactor cavity is a smooth curved surface;
[0015] The inner surfaces of the valve core and valve seat are flush with the reactor cavity.
[0016] Furthermore, the blowing nozzle of the blowing device is a circumferentially distributed 6–12 micro-hole nozzles.
[0017] Furthermore, the outlet direction of the air blowing nozzle forms an angle of 30° to 60° with the rotation direction of the valve core.
[0018] Furthermore: the long eccentric swing arm is an L-shaped or arc-shaped forging, and its rotation axis is perpendicular to the material flow channel. When in the open state, the long eccentric swing arm is located in the clearance groove on the side wall of the valve body.
[0019] Furthermore, the valve core and the eccentric rotating shaft are detachably fixedly connected.
[0020] Compared with the prior art, this utility model has the following advantages: It adopts an eccentric rotating shaft structure, which makes the valve core move along a non-concentric trajectory during the opening and closing process. When the valve is closed, the valve core presses against the valve seat under the thrust of the linear stroke cylinder to achieve a hard seal. When it is opened, the linear piston of the linear stroke cylinder extends, and through the lever effect of the long eccentric swing arm, the valve core first separates from the hard sealing surface radially, and then rotates around the eccentric shaft to the fully open position. This avoids sliding friction between the valve core and the valve seat sealing surface, greatly reducing the wear of the sealing surface. At the same time, since there is no frictional resistance in the initial stage of opening and closing, the driving torque required for valve opening is greatly reduced, effectively solving the "jamming" problem of traditional valves caused by material accumulation.
[0021] The valve core is designed to be flush with the bottom of the reactor cavity, and there are no grooves or steps on the mating surface between the valve core and the valve seat. The material can be discharged smoothly under the action of gravity without any residual space. In addition, the air blowing device is activated after each discharge. The high-pressure airflow blows along the rotation direction of the valve core to sweep the sealing surface and the inner wall of the valve cavity, removing residual particles or droplets and preventing them from drying and solidifying.
[0022] The introduction of the air blowing device allows the valve to automatically clean its interior after each discharge, without the need for disassembly or manual rinsing. The outlet direction of the air blowing channel is consistent with the rotation direction of the valve core, using the tangential force of the airflow to peel off the attached materials, resulting in high cleaning efficiency. At the same time, the air blowing pressure and time are adjustable to adapt to different material characteristics.
[0023] In summary, this invention solves the core problems of traditional discharge valves, such as seal wear, opening and closing obstruction, material residue, leakage risk, and maintenance difficulties, and has extremely high engineering practical value and market promotion prospects. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of the discharge valve;
[0025] Figure 2 This is the main view of the discharge valve;
[0026] Figure 3 This is a sectional view of the discharge valve;
[0027] Figure 4 This is a diagram showing the implementation status of the discharge valve. Detailed Implementation
[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0030] In the first embodiment of this utility model, as Figure 1 As shown, a discharge valve includes a valve body 10, one end of which is connected to the reactor cavity, and the other end is a material outlet; a valve seat 4 is fixed inside the valve body, and its inner surface is flush with the reactor cavity; characterized in that:
[0031] The valve core 3 is rotatably installed in the valve seat 4, and forms a hard sealing surface with the valve seat 4 when closed. The transition area between the valve seat 4 and the reactor cavity is a smooth curved surface. The inner surfaces of the valve core 3 and the valve seat 4 are flush with the reactor cavity.
[0032] An eccentric rotating shaft 2 is installed in a bearing seat at the top of the valve body 10. The eccentric rotating shaft 2 is fixedly connected to the valve core 3. Its rotation center has an eccentric distance relative to the center of the sealing surface of the valve core 3. The valve core 3 and the eccentric rotating shaft 2 are detachably fixed.
[0033] A long eccentric swing arm 8 is provided, with one end of the long eccentric swing arm 8 installed on the eccentric rotating shaft 2 and the other end installed on the straight piston 6 of the straight stroke cylinder 7. The straight stroke cylinder 7 is installed on the valve body 10. A sealing gasket 5 is provided between the rear end of the valve core 3 and the valve body 10. The straight stroke cylinder 7 drives the straight piston 6 to move along the axial direction of the valve core 3, applying a locking force to the valve core 3 to compress the sealing gasket 5 and enhance the hard seal pressure. The long eccentric swing arm 8 is an L-shaped or arc-shaped forging, and its rotation axis is perpendicular to the material flow channel. When in the open state, the long eccentric swing arm 8 is located in the clearance groove on the side wall of the valve body.
[0034] An eccentric rotary cylinder 1 is mounted on the valve core 3 and is used to drive the valve core 3 to move along an eccentric trajectory.
[0035] The air blowing device 9 includes a plurality of air blowing nozzles 12 arranged around the outer edge of the valve core 3, which are used to spray clean gas onto the sealing surface of the valve core 3 and the valve seat 4 before the valve core 3 is closed to remove residual materials. The air blowing nozzles 12 of the air blowing device 9 are 6-12 micro-hole nozzles evenly distributed in a circumferential direction. The outlet direction of the air blowing nozzles 12 forms an angle of 30° to 60° with the rotation direction of the valve core 3.
[0036] By adopting the above technical solution, the implementation method of this solution is as follows: Open state: The piston rod of the eccentric rotary cylinder 1 extends, pulling the long eccentric swing arm 8, driving the eccentric rotary shaft 2 to rotate, so that the valve core 3 rotates 90° around its geometric center to the fully open position; the linear stroke cylinder 7 is in the depressurization state, the linear piston 6 retracts under the action of the spring, and the sealing gasket 5 is in the free state without compression.
[0037] Closing and locking: The piston rod of the eccentric rotary cylinder 1 retracts, pushing the long eccentric rocker arm 8 to rotate the valve core 3 back to its original position. Its outer cylindrical surface contacts the inner surface of the valve seat 4 to form a hard sealing surface. Subsequently, the linear cylinder 7 takes in air, driving the linear piston 6 to move forward along the valve core 3 axially, applying axial pressure to the sealing gasket 5, causing it to compress and deform. At the same time, this axial force is transmitted to the hard sealing surface through the valve core 3, enhancing the sealing pressure.
[0038] Purging and cleaning: Before the valve core 3 is rotated to the closed position and the hard sealing surface is not fully in contact, the air blowing device 9 is started. Clean gas is sprayed through the air blowing nozzle 12 to the hard sealing surface area of the valve core 3 and the valve seat 4 to remove the material particles attached to the surface.
[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.
Claims
1. A discharge valve, comprising a valve body (10), one end of which is connected to a reactor cavity and the other end is a material outlet, and a valve seat (4) fixed in the valve body, the inner surface of which is flush with the reactor cavity; characterized in that: The valve core (3) is rotatably installed inside the valve seat (4) and forms a hard sealing surface with the valve seat (4) when closed; An eccentric rotating shaft (2) is installed in a bearing seat at the top of the valve body (10). The eccentric rotating shaft (2) is fixedly connected to the valve core (3), and its rotation center has an eccentric distance relative to the center of the sealing surface of the valve core (3). A long eccentric swing arm (8) is installed at one end on an eccentric rotating shaft (2) and at the other end on a straight piston (6) of a straight stroke cylinder (7). The straight stroke cylinder (7) is installed on a valve body (10). A sealing gasket (5) is provided between the rear end of the valve core (3) and the valve body (10). The straight stroke cylinder (7) drives the straight piston (6) to move along the axial direction of the valve core (3) and applies a locking force to the valve core (3) to compress the sealing gasket (5) and enhance the hard seal pressure. An eccentric rotary cylinder (1) is mounted on a valve core (3) and is used to drive the valve core (3) to move along an eccentric trajectory. The air blowing device (9) includes a plurality of air blowing nozzles (12) arranged around the outer edge of the valve core (3) for spraying clean gas onto the sealing surface of the valve core (3) and the valve seat (4) before the valve core (3) is closed to remove residual materials.
2. The discharge valve according to claim 1, characterized in that: The transition area between the valve seat (4) and the reactor cavity is a smooth curved surface; The inner surfaces of the valve core (3) and valve seat (4) are flush with the reactor cavity.
3. A discharge valve according to claim 1, characterized in that: The blowing nozzle (12) of the blowing device (9) consists of 6–12 micro-hole nozzles evenly distributed in a circumferential direction.
4. A discharge valve according to claim 3, characterized in that: The outlet direction of the air nozzle (12) forms an angle of 30° to 60° with the rotation direction of the valve core (3).
5. A discharge valve according to claim 4, characterized in that: The long eccentric swing arm (8) is an L-shaped or arc-shaped forging with its rotation axis perpendicular to the material flow channel. When in the open state, the long eccentric swing arm (8) is located entirely in the clearance groove on the side wall of the valve body.
6. A discharge valve according to claim 4, characterized in that: The valve core (3) and the eccentric rotating shaft (2) are detachably fixedly connected.