A blow valve for a mixing tank

Abstract

The present application relates to powder, granular material mixing equipment technical field, especially to a kind of injection valve for mixing tank.It includes valve body, and the valve body is equipped with gas inlet and gas outlet, and the gas outlet of valve body is equipped with fixed valve core, and the inside of fixed valve core is equipped with movable valve core, and movable valve core is equipped with connecting rod, and connecting rod is connected with driving mechanism and penetrates valve body, and fixed valve core and movable valve core have mutually matched conical surface, and the on-off of gas circuit is realized by driving mechanism driving movable valve core axial movement;When opening, the area of the annular gap formed between fixed valve core and movable valve core gradually changes when high-pressure gas passes through the conical surface, so that acceleration effect is generated, the injection kinetic energy is improved, and the uniformity of material fluidization is ensured;When closing, the two conical surfaces are mutually adhered to realize conical surface sealing, to prevent dust backflow and blockage.The present application eliminates the injection blind area of traditional fixed injection structure, has the characteristics of strong injection power, reliable sealing, wear-resistant and anti-blocking, and is suitable for high-precision continuous powder mixing production.

Description

Technical Field

[0001] This invention relates to the field of powder and granular material mixing equipment, and in particular to a jet valve for a mixing tank. Background Technology

[0002] Mixing tanks are core equipment for mixing and unloading powder and granular materials, and are widely used in many industries such as chemical, building materials, and new materials. As a key component of the mixing tank, the blow valve is mainly used to achieve material fluidization inside the tank, prevent bridging, and remove material adhering to the tank walls, directly determining the material mixing effect and the stability of continuous equipment operation.

[0003] Currently, most conventional mixing tank blowing valves in the industry adopt a conventional structure with solenoid valves directly connected to air supply and fixed nozzles. This simple overall design only meets basic blowing operations and cannot adapt to the demands of high-precision, continuous industrial production. Existing equipment exhibits numerous shortcomings in practical use: Firstly, unstable injection pressure and insufficient airflow impact force lead to incomplete clearing of material blockage inside the tank and poor material mixing uniformity, which seriously affects the quality of material processing. Secondly, the valve body sealing structure is simple and is prone to air leakage due to long-term erosion and wear from high-speed dust, resulting in a high equipment failure rate. Third, the fixed spray structure has a large spray blind area, which limits the fluidization of materials and the cleaning effect of the wall, and the equipment has poor adaptability. Fourth, the valve body is prone to clogging and damage, requiring frequent maintenance and downtime for repairs, which reduces overall production efficiency and increases equipment operation and maintenance costs.

[0004] Therefore, in view of the shortcomings of the existing technology, there is an urgent need to design a mixing tank spray valve that is structurally reliable, stable in spraying, anti-clogging and wear-resistant, and has no blind spots in spraying, so as to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a jet valve for mixing tanks, which solves the technical problems of unstable jet pressure, poor unclogging effect, easy wear of seals, and large jet blind zone in existing equipment. It achieves stable jet power, wear-resistant and anti-clogging valve body, and no blind zone, effectively improving the operating stability of mixing tanks and the material mixing effect, reducing equipment operation and maintenance costs, and adapting to the needs of continuous and high-precision production operations.

[0006] This invention provides a jet valve for a mixing tank, comprising a valve body with an air inlet and an air outlet. A fixed valve core is located at the air outlet of the valve body, and a movable valve core is located inside the fixed valve core. A connecting rod is provided on the movable valve core, and the connecting rod passes through the valve body and connects to a driving mechanism. The fixed valve core and the movable valve core have mutually cooperating conical surfaces. When the movable valve core moves to the open position under the drive of the driving mechanism, an air supply channel is formed between the conical surfaces of the fixed valve core and the movable valve core. When the movable valve core moves to the closed position under the drive of the driving mechanism, the conical surfaces of the fixed valve core and the movable valve core fit together to achieve a seal.

[0007] Furthermore, the driving mechanism is a cylinder, one end of the connecting rod is fixedly connected to the movable valve core, and the other end is connected to the piston rod of the cylinder through a thread. The piston rod end of the cylinder is provided with an internal thread, and the end of the connecting rod is provided with an external thread that mates with the internal thread.

[0008] Furthermore, the movable valve core is driven by the cylinder to reciprocate linearly along the axial direction of the valve body, thereby realizing the opening and closing of the fixed valve core and the movable valve core, and completing the on / off control of the jet air path.

[0009] Furthermore, a pin hole is provided through the connecting rod, and a limit pin is installed in the pin hole, the limit pin being located inside the valve body.

[0010] Furthermore, the length of the limiting pin is greater than the diameter of the connecting rod and also greater than the diameter of the valve body outlet.

[0011] Furthermore, the limiting pin is interference-fitted with the pin hole.

[0012] Furthermore, the movable valve core has a frustum-shaped structure, and the small end face of the movable valve core is fixedly connected to the connecting rod.

[0013] Furthermore, the fixed valve core includes a base, which is fixedly connected to the outer wall of the valve body. A housing is fixed to the side of the base, and the channel inside the housing is composed of a conical channel and a cylindrical channel, wherein the cylindrical channel is connected to the air outlet of the valve body, and the diameter of the cylindrical channel is larger than the diameter of the connecting rod.

[0014] Furthermore, the valve body is installed on the outer wall of the mixing tank and located above the discharge port at the bottom of the mixing tank, and both the fixed valve core and the movable valve core are located inside the mixing tank.

[0015] Furthermore, it also includes a control system connected to the drive mechanism, used to control the timing and frequency of the reciprocating motion of the drive mechanism to achieve intermittent pulse jet blowing of the mixing tank.

[0016] In summary, compared with the prior art, the present invention has the following advantages: The technical solution provided by this invention involves setting mutually cooperating conical surfaces between a fixed valve core and a movable valve core. When high-pressure gas flows through the annular gap between the two conical surfaces, an acceleration effect is generated due to the gradual change in the flow cross-sectional area, increasing the airflow velocity and significantly enhancing the jetting kinetic energy. This increases the impact and agitation effect on the material inside the tank, making the material more uniformly mixed, effectively solving the problems of insufficient jetting pressure and poor mixing effect in the prior art. Multiple jetting valves are evenly arranged circumferentially on the side wall of the mixing tank, enabling full-circumferential, dead-angle-free fluidized jetting and significantly reducing jetting blind spots. Furthermore, the conical surface cooperation has a higher sealing specific pressure and self-centering characteristics compared to traditional simple sealing structures. It can better maintain the seal integrity in high-speed dust scouring environments, reducing the leakage rate and extending the valve body's service life. The large-diameter conical structure near the tank body can prevent dust backflow and, together with the jetting airflow, achieve valve body self-cleaning, effectively preventing valve body blockage and reducing equipment maintenance frequency. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the jet valve in an embodiment of the present invention; Figure 2 This is a schematic diagram of the fixed valve core structure in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the fixed valve core in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the movable valve core and the connecting rod in an embodiment of the present invention; Figure 5 This is an assembly diagram of the injection valve and the mixing tank in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1-valve body; 101-air inlet; 2-fixed valve core; 201-base; 202-housing; 2021-conical channel; 2022-cylindrical channel; 3-movable valve core; 4-connecting rod; 401-external thread; 402-pin hole; 5-cylinder; 6-limit pin; 7-mixing tank. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and 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 limiting this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example A type of blow valve for a mixing tank, such as Figure 1 As shown, it includes a valve body 1, a fixed valve core 2, a movable valve core 3, a connecting rod 4, a cylinder 5, a limit pin 6, and a matching control system.

[0024] The valve body 1 is the main pressure-bearing component of the blow valve. The outer wall of the valve body 1 is provided with an air inlet 101 and an air outlet. The air inlet 101 is used to connect to an external high-pressure air source to introduce high-pressure gas into the valve body 1.

[0025] In this embodiment, a fixed valve core 2 is fixedly installed on the outer wall of the valve body 1 at the air outlet position. For example... Figure 2 and Figure 3As shown, the fixed valve core 2 includes a base 201 and a housing 202. The base 201 is fixedly connected to the outer wall of the valve body 1. The housing 202 is integrally fixed to the side of the base 201. The housing 202 is installed inside the mixing tank 7. A through channel is provided inside the housing 202, which consists of a conical channel 2021 and a cylindrical channel 2022. The cylindrical channel 2022 is directly connected to the air outlet of the valve body 1, and the inner diameter of the cylindrical channel 2022 is larger than the diameter of the connecting rod 4, providing sufficient clearance for the axial reciprocating movement of the connecting rod 4 and effectively avoiding movement jamming or sticking. The conical surface formed by the inner wall of the conical channel 2021 is precisely matched with the conical surface of the outer wall of the movable valve core 3.

[0026] The movable valve core 3 is assembled inside the housing 202 of the fixed valve core 2, such as... Figure 4 As shown, the movable valve core 3 adopts a solid frustum structure, which has high structural strength and is resistant to airflow impact. The small end face of the movable valve core 3 is fixedly connected to the end of the connecting rod 4, while the large end face faces the inside of the mixing tank 7. The conical surface of the outer wall of the movable valve core 3 and the conical surface of the fixed valve core 2 cooperate with each other, forming a conical sealing and ventilation structure. The connecting rod 4 is axially inserted through the cavity of the valve body 1. The end of the connecting rod 4 away from the movable valve core 3 is provided with an external thread 401, and the piston rod end of the cylinder 5 is provided with a matching internal thread. The connecting rod 4 is detachably assembled and fixed to the piston rod of the cylinder 5 through the external thread 401, which facilitates later disassembly, maintenance, and parts replacement.

[0027] A pin hole 402 is provided in the middle of the connecting rod 4. A limit pin 6 is fitted inside the pin hole 402 with an interference fit. The limit pin 6 is integrally arranged in the internal cavity of the valve body 1. The length of the limit pin 6 is greater than the diameter of the connecting rod 4 and greater than the diameter of the air outlet of the valve body 1. Both ends of the limit pin 6 can extend radially outward from the outside of the connecting rod 4. The function of the limit pin 6 is to prevent the movable valve core 3 from flying out and blocking other channels due to insufficient thread connection at the threaded connection, thereby improving the operational safety and structural stability of the equipment.

[0028] In this embodiment, the cylinder 5 serves as a driving mechanism, which can drive the connecting rod 4 and the movable valve core 3 to make precise reciprocating linear motion along the axial direction of the valve body 1. The precise opening and closing and sealing control of the air passage are achieved by relying on the conical surfaces of the fixed valve core 2 and the movable valve core 3 that cooperate with each other.

[0029] This embodiment is equipped with a control system, which is electrically connected to cylinder 5. Operators can preset the cylinder's extension and retraction sequence, movement frequency, and single-blow duration through the control system to achieve automated intermittent pulse blowing operations. For different working conditions such as ultrafine powders, coarse particles, and high-humidity, easily agglomerated materials, the blowing interval, blowing duration, and blowing rhythm can be flexibly adjusted, adapting to the needs of mixing and unclogging various materials, demonstrating strong equipment adaptability.

[0030] The overall assembly method of the jet valve provided by this invention is as follows: Figure 5 As shown, the valve body 1 is fixedly installed on the outside of the mixing tank 7, and the installation position is above the bottom outlet of the mixing tank 7. The base of the fixed valve core 2 is fixed to the flange on the outer side wall of the mixing tank 7. The housing 202 and the movable valve core 3 extend into the internal cavity of the mixing tank 7 as a whole, and purge and fluidize the material in the tank at close range.

[0031] In actual installation and use, multiple sets of these jet valves can be evenly arranged around the side wall of the mixing tank 7. Through the control system, synchronous or sequential pulse jetting of multiple valves can be achieved to achieve fluidized mixing in the entire circumference of the tank without dead corners, further improving the uniformity of material mixing.

[0032] The specific working process of the jet valve provided by this invention is divided into a jetting stage and a closing stage: During the blowing stage: The piston rod of cylinder 5 extends, driving connecting rod 4 and movable valve core 3 to move towards the interior of mixing tank 7. The gap between the conical surface of movable valve core 3 and the conical surface of fixed valve core 2 gradually increases. When movable valve core 3 moves to its maximum opening position, a high-flow-rate conical air supply channel is formed between the two conical surfaces. High-pressure gas enters the valve body 1 through inlet 101, passes through outlet, cylindrical channel 2022, and conical channel 2021 in sequence, and is finally injected into the mixing tank 7 at high speed. The conical air supply channel has a large air volume, stable airflow pressure, and uniform impact force, which can quickly disperse the material accumulated in the tank and achieve thorough mixing. At the same time, the large-diameter conical structure near the tank can prevent most of the dust from backflowing into the valve body 1. A small amount of residual dust can be blown back into the tank by the high-pressure airflow in the next blowing operation, achieving self-cleaning of the valve body and preventing blockage.

[0033] Closure Phase: After the material mixing process meets the requirements, the piston rod of cylinder 5 retracts, pulling connecting rod 4 and movable valve core 3 back towards valve body 1. The outer conical surface of movable valve core 3 gradually fits into the inner conical surface of fixed valve core 2, ultimately achieving a precision conical seal, cutting off the blowing air path, and preventing dust and material backflow into the valve body cavity, thus avoiding dust accumulation, air leakage, and wear malfunctions in the valve. After the air path closure is completed, mixing tank 7 can proceed with normal unloading operations.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A jet valve for a mixing tank, characterized in that, The device includes a valve body (1), which has an air inlet (101) and an air outlet. A fixed valve core (2) is provided at the air outlet of the valve body (1). A movable valve core (3) is provided inside the fixed valve core (2). A connecting rod (4) is provided on the movable valve core (3). The connecting rod (4) passes through the valve body (1) and is connected to the drive mechanism. The fixed valve core (2) and the movable valve core (3) have mutually cooperating conical surfaces. When the movable valve core (3) moves to the open position under the drive of the drive mechanism, an air supply channel is formed between the conical surfaces of the fixed valve core (2) and the movable valve core (3). When the movable valve core (3) moves to the closed position under the drive of the drive mechanism, the conical surfaces of the fixed valve core (2) and the movable valve core (3) fit together to achieve a seal.

2. The jet valve for a mixing tank according to claim 1, characterized in that, The driving mechanism is a cylinder (5). One end of the connecting rod (4) is fixedly connected to the movable valve core (3), and the other end is connected to the piston rod of the cylinder (5) by a thread. The piston rod end of the cylinder (5) is provided with an internal thread, and the end of the connecting rod (4) is provided with an external thread (401) that mates with the internal thread.

3. The jet valve for a mixing tank according to claim 2, characterized in that, The movable valve core (3) is driven by the cylinder (5) to reciprocate linearly along the axial direction of the valve body (1), thereby realizing the opening and closing of the fixed valve core (2) and the movable valve core (3) and completing the on / off control of the blowing air path.

4. The jet valve for a mixing tank according to claim 1, characterized in that, The connecting rod (4) has a through hole (402), and a limiting pin (6) is installed in the through hole (402). The limiting pin (6) is located inside the valve body (1).

5. The jet valve for a mixing tank according to claim 4, characterized in that, The length of the limiting pin (6) is greater than the diameter of the connecting rod (4) and greater than the diameter of the air outlet of the valve body (1).

6. The jet valve for a mixing tank according to claim 4, characterized in that, The limiting pin (6) is interference-fitted with the pin hole (402).

7. The jet valve for a mixing tank according to claim 1, characterized in that, The movable valve core (3) has a frustum-shaped structure, and the small end face of the movable valve core (3) is fixedly connected to the connecting rod (4).

8. The jet valve for a mixing tank according to claim 7, characterized in that, The fixed valve core (2) includes a base (201), which is fixedly connected to the outer wall of the valve body (1). A housing (202) is fixed to the side of the base (201). The channel inside the housing (202) is composed of a conical channel (2021) and a cylindrical channel (2022). The cylindrical channel (2022) is connected to the air outlet of the valve body (1). The diameter of the cylindrical channel (2022) is larger than the diameter of the connecting rod (4).

9. The jet valve for a mixing tank according to claim 1, characterized in that, The valve body (1) is installed on the outer wall of the mixing tank and is located above the discharge port at the bottom of the mixing tank. The fixed valve core (2) and the movable valve core (3) are both located inside the mixing tank.

10. The jet valve for a mixing tank according to claim 1, characterized in that, It also includes a control system connected to the drive mechanism, which controls the timing and frequency of the reciprocating motion of the drive mechanism to achieve intermittent pulse jet blowing of the mixing tank.

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