Self-tightening seal structure for powder feeding tank inlet

Abstract

The utility model belongs to powder feeding technical field, concretely for a kind of self-tight sealing structure for powder sending tank feed inlet, including pressure-resistant sending storage tank, the top of pressure-resistant sending storage tank is equipped with valve body, the inside of valve body is equipped with self-sealing mechanism;The self-sealing mechanism includes sealing cylinder, the valve rod fixed seat is integrally connected on the valve body, the sealing cylinder is hinged and installed in pressure-resistant sending storage tank, the output end of sealing cylinder is fixedly connected with cylinder rod, the valve rod fixed seat is rotatably installed with valve rod, one end of the valve rod is fixedly connected with valve seat by pull rod, the cylinder rod and valve rod rotatably installed with rotating rod between, the bottom of pressure-resistant sending storage tank is fixedly connected with inlet pipe, rely on self-sealing mechanism, tank pressure will be converted into perpendicular to the sealing surface pressure compacting force, the higher the system pressure, the more closely the sealing surface fits, avoid the leakage problem in the process of pressure and delivery.

Description

Technical Field

[0001] This utility model relates to the field of powder feeding technology, specifically a self-tightening sealing structure for the feed inlet of a powder delivery tank. Background Technology

[0002] In the powder industry, such as chemical, food, and pharmaceutical fields, conveying tanks (or pressure tanks) are commonly used for pneumatic conveying of powders. When the conveying tank is in operation, powder is first loaded into the inlet, then the inlet valve is closed, and compressed gas is then introduced into the tank to create pressure, thereby conveying the powder to its destination.

[0003] The sealing performance of the feed valve is crucial. A poor seal will lead to leakage during pressurization and conveying, causing not only material loss and environmental pollution but also insufficient pressure, potentially causing the conveying system to fail. Traditional feed valves mostly use cylinder-driven flat gate valves or butterfly valves. Existing valves largely rely on the cylinder's clamping force to ensure a seal. When the pressure inside the tank is high, the requirements for the cylinder's thrust and the valve body's strength are very high, increasing manufacturing costs and energy consumption. Therefore, we propose a self-tightening sealing structure for the feed inlet of a powder conveying tank. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a self-tightening sealing structure for the feed inlet of a powder delivery tank, thus solving the problems mentioned below.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A self-tightening sealing structure for the feed inlet of a powder feeding tank includes a pressure-resistant feeding tank, a valve body installed on the top of the pressure-resistant feeding tank, a discharge pipe fixedly installed on the pressure-resistant feeding tank, and a self-sealing mechanism installed inside the valve body. The self-sealing mechanism includes a sealing cylinder. A valve stem fixing seat is integrally connected to the valve body. The sealing cylinder is hinged to the pressure-resistant sending tank. A cylinder rod is fixedly connected to the output end of the sealing cylinder. A valve stem is rotatably mounted on the valve stem fixing seat. A pull rod is hinged to one end of the valve stem. A valve seat is hinged to the pull rod. The valve stem fixing seat has a slotted opening. The other part of the valve stem extends out of the slotted opening. A rotating rod is rotatably mounted between the cylinder rod and the valve stem. An air inlet pipe is fixedly connected to the bottom of the pressure-resistant sending tank. An inclined guide sealing plate is fixedly connected inside the valve body. The valve seat abuts against the inclined guide sealing plate.

[0006] Preferably, a pressure gauge is fixedly installed on the top of the pressure-resistant delivery tank.

[0007] Preferably, a pressure relief pipe is fixedly connected to the top of the pressure-resistant storage tank, and a pressure relief valve is installed on the pressure relief pipe.

[0008] Preferably, a first flange is fixedly connected to the top of the pressure-resistant sending tank, and a second flange is fixedly connected to the bottom of the valve body. The first flange and the second flange are fixedly connected by several bolts, and a sealing ring is installed between the first flange and the second flange.

[0009] Preferably, a mating flange is fixedly connected to the top of the valve body.

[0010] Preferably, the valve stem is L-shaped.

[0011] Preferably, a rubber sealing cover is fixedly connected above the valve stem fixing seat and at the slot, and the rubber sealing cover is fixedly connected to the valve stem.

[0012] This invention provides a self-tightening sealing structure for the feed inlet of a powder delivery tank. Compared with the prior art, it has the following advantages: 1. Extremely high sealing reliability, achieving "tighter with pressure" Relying on the self-sealing mechanism, the pressure inside the tank is converted into a clamping force perpendicular to the sealing surface. The higher the system pressure, the tighter the sealing surface fits, avoiding pressure buildup and leakage problems during transportation.

[0013] 2. Energy saving and cost reduction, reducing equipment load. The self-tightening sealing effect significantly reduces the thrust requirement of the sealing cylinder. The sealing cylinder only needs to provide the initial closing force and does not need to resist the entire system pressure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the main structure of the present utility model. Figure 2 ; Figure 3 This is a schematic diagram of the disassembled structure of the pressure-resistant delivery tank and valve body of this utility model; Figure 4 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 5 For the present utility model Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0015] In the diagram: 1. Pressure-resistant storage tank; 2. Valve body; 3. Discharge pipe; 4. Air inlet pipe; 5. Pressure relief pipe; 6. Pressure gauge; 7. Sealing cylinder; 8. Cylinder rod; 9. Rotating rod; 10. Connecting flange; 11. Second flange; 12. First flange; 13. Valve stem; 14. Tie rod; 15. Valve seat; 16. Inclined guide sealing plate; 17. Valve stem fixing seat; 18. Rubber sealing cover; 19. Strip-shaped opening. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 This utility model provides a technical solution: a self-tightening sealing structure for the feed inlet of a powder sending tank, including a pressure-resistant sending tank 1, a valve body 2 installed on the top of the pressure-resistant sending tank 1, a discharge pipe 3 fixedly installed on the pressure-resistant sending tank 1, and a self-sealing mechanism installed inside the valve body 2. The self-sealing mechanism includes a sealing cylinder 7, a valve stem fixing seat 17 integrally connected to the valve body 2, a sealing cylinder 10 hinged to the pressure-resistant sending tank 1, a cylinder rod 8 fixedly connected to the output end of the sealing cylinder 7, a valve rod 13 rotatably mounted on the valve stem fixing seat 17, a pull rod 14 hinged to one end of the valve rod 13, a valve seat 15 hinged to the pull rod 14, a slotted opening 19 on the valve stem fixing seat 17, another part of the valve rod 13 extending out of the slotted opening 19, a rotating rod 9 rotatably mounted between the cylinder rod 8 and the valve rod 13, an air inlet pipe 4 fixedly connected to the bottom of the pressure-resistant sending tank 1, an inclined guide sealing plate 16 fixedly connected inside the valve body 2, and the valve seat 15 abutting against the inclined guide sealing plate 16.

[0018] During sealing, the sealing cylinder 7 drives the cylinder rod 8 to extend and retract. When the cylinder rod 8 extends and retracts, it drives the valve rod 13 to rotate. The valve seat 15 fits against the inclined guide sealing plate 16, forming a seal. After sealing, compressed gas is introduced into the pressure-resistant delivery storage tank 1 through the air inlet pipe 4. The pressure inside the tank gradually increases, and the pressure gauge 6 monitors the pressure value in real time. The pressure inside the tank acts on the valve seat 15. Because the inclined guide sealing plate 16 is designed with an inclination and the valve seat 15 is an adaptive structure, the pressure is decomposed into a clamping force perpendicular to the sealing surface. The greater the pressure inside the tank, the stronger the clamping force, forcing the valve seat 15 to press more tightly against the inclined guide sealing plate 16, achieving a self-tightening sealing effect that tightens with increasing pressure. This greatly reduces the output force requirement of the sealing cylinder 7. The sealing cylinder 7 only needs to provide the initial closing force and does not need to resist the entire system pressure. The self-tightening sealing is achieved by utilizing the system's own pressure, resulting in high sealing reliability. The cylinder thrust requirement is low, saving energy and reducing costs.

[0019] A pressure gauge 6 is fixedly installed on the top of the pressure-resistant sending tank 1 to facilitate the detection of the internal pressure of the pressure-resistant sending tank 1.

[0020] The top of the pressure-resistant storage tank 1 is fixedly connected to a pressure relief pipe 5, and a pressure relief valve is installed on the pressure relief pipe 5, through which pressure can be relieved.

[0021] The top of the pressure-resistant storage tank 1 is fixedly connected to a first flange 12, and the bottom of the valve body 2 is fixedly connected to a second flange 11. The first flange 12 and the second flange 11 are fixedly connected by several bolts, and a sealing ring is installed between the first flange 12 and the second flange 11 to facilitate the disassembly and assembly of the valve body 2.

[0022] The valve body 2 is fixedly connected to the top of the mating flange 10, and the valve stem 13 is 'L' shaped.

[0023] A rubber sealing cover 18 is fixedly connected above the valve stem fixing seat 17 and at the slot 19. The rubber sealing cover 18 is fixedly connected to the valve stem 13. The slot 19 can be sealed by the rubber sealing cover 18 without affecting the rotation of the valve stem 13.

[0024] Working principle: During sealing, the sealing cylinder 7 drives the cylinder rod 8 to extend and retract. When the cylinder rod 8 extends and retracts, it drives the valve rod 13 to rotate. The valve seat 15 fits against the inclined guide sealing plate 16, forming a seal. Compressed gas is then introduced into the pressure-resistant delivery tank 1 through the air inlet pipe 4. The pressure inside the tank gradually increases, and the pressure gauge 6 monitors the pressure value in real time. The pressure inside the tank acts on the valve seat 15. Because the inclined guide sealing plate 16 is designed with an inclination and the valve seat 15 is an adaptive structure, the pressure is decomposed into a clamping force perpendicular to the sealing surface. The greater the pressure inside the tank, the stronger the clamping force, forcing the valve seat 15 to press more tightly against the inclined guide sealing plate 16, achieving a self-tightening sealing effect that tightens with increasing pressure. This greatly reduces the output force requirement of the sealing cylinder 7. The sealing cylinder 7 only needs to provide the initial closing force and does not need to resist the entire system pressure. The self-tightening sealing is achieved by utilizing the system's own pressure, resulting in high sealing reliability. The cylinder thrust requirement is low, saving energy and reducing costs.

[0025] After the powder is conveyed, open the pressure relief valve on the pressure relief pipe 5 to release the pressure in the pressure-resistant conveying tank 1, and the clamping force of the self-tightening seal will disappear; the sealing cylinder 7 extends and retracts in the opposite direction, driving the valve stem 13 to reset, and the valve seat 15 disengages from the inclined guide sealing plate 16 through the pull rod 14, and the equipment returns to the initial feeding state, waiting for the next round of operation.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-tightening sealing structure for the feed inlet of a powder delivery tank, comprising a pressure-resistant delivery tank (1), characterized in that: A valve body (2) is installed on the top of the pressure-resistant sending tank (1), a discharge pipe (3) is fixedly installed on the pressure-resistant sending tank (1), and a self-sealing mechanism is installed inside the valve body (2). The self-sealing mechanism includes a sealing cylinder (7), a valve stem fixing seat (17) is integrally connected to the valve body (2), the sealing cylinder (7) is hinged to the pressure-resistant sending tank (1), the output end of the sealing cylinder (7) is fixedly connected to a cylinder rod (8), a valve rod (13) is rotatably installed on the valve stem fixing seat (17), a pull rod (14) is hinged to one end of the valve rod (13), a valve seat (15) is hinged to the pull rod (14), a slotted opening (19) is opened on the valve stem fixing seat (17), another part of the valve rod (13) extends out of the slotted opening (19), a rotating rod (9) is rotatably installed between the cylinder rod (8) and the valve rod (13), an air inlet pipe (4) is fixedly connected to the bottom of the pressure-resistant sending tank (1), an inclined guide sealing plate (16) is fixedly connected inside the valve body (2), and the valve seat (15) abuts against the inclined guide sealing plate (16).

2. The self-tightening sealing structure for the feed inlet of a powder delivery tank according to claim 1, characterized in that: A pressure gauge (6) is fixedly installed on the top of the pressure-resistant storage tank (1).

3. The self-tightening sealing structure for the feed inlet of a powder delivery tank according to claim 2, characterized in that: The top of the pressure-resistant storage tank (1) is fixedly connected to a pressure relief pipe (5), and a pressure relief valve is installed on the pressure relief pipe (5).

4. The self-tightening sealing structure for the feed inlet of a powder delivery tank according to claim 3, characterized in that: The top of the pressure-resistant storage tank (1) is fixedly connected to a first flange (12), and the bottom of the valve body (2) is fixedly connected to a second flange (11). The first flange (12) and the second flange (11) are fixedly connected by several bolts, and a sealing ring is installed between the first flange (12) and the second flange (11).

5. The self-tightening sealing structure for the feed inlet of a powder delivery tank according to claim 4, characterized in that: The valve body (2) is fixedly connected to a mating flange (10) on its top.

6. The self-tightening sealing structure for the feed inlet of a powder delivery tank according to claim 5, characterized in that: The valve stem (13) is L-shaped.

7. The self-tightening sealing structure for the feed inlet of a powder delivery tank according to claim 6, characterized in that: A rubber sealing cover (18) is fixedly connected above the valve stem fixing seat (17) and at the slot (19), and the rubber sealing cover (18) is fixedly connected to the valve stem (13).

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