Modular low pressure continuous delivery valve

Abstract

The utility model relates to valve technical field, concretely is a kind of modularization low pressure continuous conveying valve, including low pressure pump main body, the inside sliding connection of low pressure pump main body has piston rod, the outside of piston rod is equipped with multiple round grooves, the outside rotationally connected of piston rod has handle, the side of handle close to piston rod is provided with threaded rod, this modularization low pressure continuous conveying valve, by low pressure pump main body work drive piston rod in its inside sliding, and by the aid of multiple ball reduce friction in movement process, simultaneously by rotating handle drive connecting block, connecting block further drive trapezoidal block sliding, trapezoidal block sliding process again drive expansion conical block up and down movement, expansion conical block in turn stop limit block and carry out diffusion movement, to realize the accurate regulation and control to ball sliding pressure in low pressure pump main body inner wall, can be freely adjusted sliding resistance according to user actual demand.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a modular low-pressure continuous delivery valve. Background Technology

[0002] Low-pressure continuous delivery valves are fluid control components with a nominal pressure (PN) not exceeding 1.6MPa. They are mainly used to achieve continuous delivery and flow regulation of media under low-pressure conditions. Unlike medium- and high-pressure valves (1.6MPa < PN ≤ 10MPa) and high-pressure valves (PN > 10MPa), their core feature is that they take into account both low-pressure environment adaptability and delivery continuity, and are widely applicable to the media transmission needs of various low-pressure fluid systems.

[0003] A search revealed Chinese patent (CN203682620U), which includes a feed chamber and a discharge chamber separated by a partition, an intermediate chamber with variable volume connected to both chambers, a feed door opening and closing device, a discharge door opening and closing device, and an intermediate chamber volume change control device. The advantages of this invention are that the discharge chamber and feed chamber are completely separated during operation, preventing compressed air from entering the feed chamber. Furthermore, the suction is negative pressure, resulting in a high filling rate and zero dust generation, thus benefiting environmental protection. Because there is no compressed air leakage, there is no erosion of the cylinder, leading to a longer service life for the discharge valve. Maintenance typically only requires replacing the seals on the valve head and piston, a simple and low-cost process.

[0004] The aforementioned patent proposes a discharge valve where the discharge chamber and feed chamber are completely separated throughout the entire operation. Compressed air in the discharge chamber will not enter the feed chamber, and the material is drawn in under negative pressure, resulting in a high material filling rate and no dust generation, which is beneficial to environmental protection. Since there is no compressed air leakage, there is no erosion of the cylinder, leading to a longer service life for the discharge valve. Maintenance typically only requires replacing the valve head and piston seals, a simple process. However, disassembling the piston in this structure is relatively complex, and the piston's friction is difficult to adjust during operation, resulting in significant wear and a shorter overall service life. Therefore, we propose a modular low-pressure continuous conveying valve. Utility Model Content

[0005] One of the technical problems this application aims to solve is that the piston disassembly steps of the above-mentioned structure are relatively complicated, and the friction is difficult to adjust when the piston is working, resulting in greater wear and a shorter overall service life.

[0006] To address the aforementioned technical problems, this application provides a modular low-pressure continuous delivery valve, comprising a low-pressure pump body, a piston rod slidably connected inside the low-pressure pump body, a plurality of circular grooves formed on the outer side of the piston rod, a handle rotatably connected to the outer side of the piston rod, and a threaded rod provided on the side of the handle near the piston rod.

[0007] In some embodiments, a connecting block is slidably connected to the outer side of the threaded rod, a trapezoidal block is provided at the top of the connecting block, an expanding conical block is slidably connected to the inside of the piston rod, a plurality of balls are rotatably connected to the outer side of the expanding conical block, and a limit block is provided inside the piston rod.

[0008] In some embodiments, a bottom cover is rotatably connected to the bottom end of the low-pressure pump body, a toothed ring is provided at the top end of the bottom cover, a plurality of protective shells are provided on the outside of the bottom cover, a rotating shaft is rotatably connected inside the plurality of protective shells, a gear is provided on the outside of the plurality of rotating shafts, and a nut block is provided at the bottom end of the plurality of rotating shafts.

[0009] In some embodiments, the trapezoidal block is slidably connected to the bottom end of the expanding conical block, and the expanding conical block is slidably connected to the outside of the limiting block.

[0010] In some embodiments, the balls are located on the inner wall of the circular groove, and a plurality of the balls are slidably connected to the inner wall of the low-pressure pump body.

[0011] In some embodiments, the plurality of gears are meshed with the gear ring, and the threaded rod is rotatably connected inside the piston rod.

[0012] In some embodiments, the toothed ring is rotatably connected inside the low-pressure pump body, and the nut block is rotatably connected to the bottom end of the protective shell.

[0013] This utility model has at least the following beneficial effects: 1. The low-pressure pump body drives the piston rod to slide inside, and multiple balls reduce friction during the movement. At the same time, rotating the handle drives the connecting block, which in turn drives the trapezoidal block to slide. During the sliding of the trapezoidal block, the expanding cone block moves up and down. The expanding cone block then abuts against the limiting block for diffusion, thereby achieving precise control of the sliding pressure of the balls on the inner wall of the low-pressure pump body. The sliding resistance can be freely adjusted according to the user's actual needs, effectively adapting to different working conditions and accurately meeting diverse working requirements. At the same time, the friction reduction effect of the balls ensures the smoothness of the conveying valve's movement, significantly improving the overall operational stability and adaptability of the equipment, and meeting the continuous conveying needs in different scenarios.

[0014] 2. By rotating the nut block, multiple gears are driven to rotate, which in turn acts on the bottom cover for disassembly, thus achieving a more labor-saving and faster disassembly of the bottom cover, effectively reducing the time spent on disassembly operations and improving work efficiency; at the same time, relying on this convenient disassembly structure, the piston rod can be quickly repaired, cleaned and replaced, greatly reducing the difficulty of equipment maintenance, reducing maintenance time costs, ensuring the long-term stable operation of the overall equipment, and improving the convenience of equipment use and the economy of operation and maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall bottom structure of this utility model; Figure 3 This is a schematic diagram of the piston rod structure of this utility model; Figure 4 This is a schematic diagram of the expanded conical block structure of this utility model; Figure 5 This is a schematic diagram of the toothed ring structure of this utility model.

[0016] In the diagram: 1. Low-pressure pump body; 2. Piston rod; 3. Circular groove; 4. Rotary handle; 5. Threaded rod; 6. Connecting block; 7. Trapezoidal block; 8. Expanding conical block; 9. Ball bearing; 10. Limiting block; 11. Bottom cover; 12. Gear ring; 13. Protective shell; 14. Rotating shaft; 15. Gear; 16. Nut block. Detailed Implementation

[0017] 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.

[0018] Example 1: Please refer to Figures 1-3 This utility model provides a technical solution: A modular low-pressure continuous delivery valve includes a low-pressure pump body 1, which provides an installation support frame for the entire delivery valve and serves as the basic carrier for the assembly and operation of various components. A piston rod 2 is slidably connected inside the low-pressure pump body 1. The piston rod 2 slides along the inner wall of the low-pressure pump body 1, cooperating with the internal structure to achieve continuous medium delivery. Multiple circular grooves 3 are formed on the outer side of the piston rod 2, which accommodate balls 9, providing installation and movement limit space for the balls 9 and ensuring their stable operation. A handle 4 is rotatably connected to the outer side of the piston rod 2. The handle 4 serves as a manual adjustment mechanism; rotation drives the subsequent threaded rod 5, providing power input for adjusting sliding resistance. A threaded rod 5 is located on the side of the handle 4 closest to the piston rod 2. The threaded rod 5 converts the rotational motion of the handle 4 into the linear motion of the connecting block 6, and is the core component for transmitting adjustment power.

[0019] Example 2: Please refer to Figures 3-5 This utility model provides a technical solution: A connecting block 6 is slidably connected to the outer side of the threaded rod 5. The connecting block 6 slides along its axial direction under the drive of the threaded rod 5, thereby driving the top trapezoidal block 7 to move synchronously and realize power transmission. The top of the connecting block 6 is provided with a trapezoidal block 7. The trapezoidal block 7 uses its own trapezoidal structure to generate an upward or downward thrust on the expansion cone block 8 during the sliding process, driving the expansion cone block 8 to move. The piston rod 2 is slidably connected to the expansion cone block 8. The expansion cone block 8 changes the force on the limiting block 10 by moving up and down, thereby controlling the state of the ball 9. Multiple balls 9 are rotatably connected to the outer side of the expansion cone block 8. The balls 9 reduce the sliding friction between the piston rod 2 and the inner wall of the low-pressure pump body 1 by rotating themselves, improving the smoothness of component movement.

[0020] A limiting block 10 is provided inside the piston rod 2. The limiting block 10 limits the movement direction of the expanding cone block 8 and restricts the diffusion range of the ball bearing 9, ensuring that the ball bearing 9 always moves within the preset trajectory. The trapezoidal block 7 is slidably connected to the bottom end of the expanding cone block 8. Through sliding cooperation, the horizontal movement of the trapezoidal block 7 is converted into the vertical movement of the expanding cone block 8, realizing the conversion of adjustment action. The expanding cone block 8 is slidably connected to the outside of the limiting block 10. Under the constraint of the limiting block 10, it slides stably to avoid the movement deviation of the expanding cone block 8 and ensure the accuracy of pressure adjustment. The ball bearing 9 is located on the inner wall of the circular groove 3. Through the limiting of the circular groove 3, the ball bearing 9 is kept in contact with the inner wall of the low-pressure pump body 1, and continues to play a drag reduction role. Multiple balls bearing 9 are slidably connected to the inner wall of the low-pressure pump body 1. When sliding along the inner wall of the low-pressure pump body 1, the pressure applied by the expanding cone block 8 can change the contact tightness with the inner wall, thereby adjusting the sliding resistance of the piston rod 2 to adapt to different working requirements.

[0021] A bottom cover 11 is rotatably connected to the bottom end of the low-pressure pump body 1. The bottom cover 11 seals the bottom end of the low-pressure pump body 1 and can be quickly disassembled by rotation, providing operating space for the maintenance, cleaning and replacement of the internal piston rod 2. A gear ring 12 is provided at the top of the bottom cover 11. The gear ring 12 meshes with a gear 15, which converts the rotation of a single gear 15 into the overall rotation of the bottom cover 11, achieving labor-saving disassembly. Multiple protective shells 13 are provided on the outside of the bottom cover 11. The protective shells 13 protect the internal rotating shaft 14, gear 15 and other transmission components, preventing external impurities from entering and affecting the transmission effect, and preventing exposed components from causing safety hazards. The inside of each of the multiple protective shells 13 is rotatably connected to a rotating shaft 14. The rotating shaft 14 transmits the rotational power of the nut block 16 to the gear 15, ensuring a continuous transmission path. Gears 15 are provided on the outside of each of the multiple rotating shafts 14. The gears 15 mesh with the gear ring 12, which converts the rotation of the rotating shaft 14 into the rotation of the gear ring 12, thereby driving the bottom cover 11 to rotate, achieving labor-saving operation.

[0022] Each of the multiple rotating shafts 14 has a nut block 16 at its bottom. The nut block 16 serves as a manual operating component. Rotating a single nut block 16 drives the corresponding rotating shaft 14 and gear 15 to rotate, thereby driving the gear ring 12 and the bottom cover 11 to move. This significantly reduces the force required for disassembly and improves work efficiency. The multiple gears 15 are meshed with the gear ring 12. This meshing relationship ensures efficient power transmission, prevents transmission slippage, and ensures stable and controllable disassembly of the bottom cover 11. The threaded rod 5 is rotatably connected inside the piston rod 2 and rotates stably inside the piston rod 2, providing stable power for the sliding of the connecting block 6 and ensuring the reliable implementation of the sliding resistance adjustment function. The gear ring 12 is rotatably connected inside the low-pressure pump body 1 and rotates stably inside the low-pressure pump body 1, driving the bottom cover 11 to rotate synchronously. This prevents the bottom cover 11 from shifting during disassembly and improves disassembly convenience. The nut block 16 is rotatably connected to the bottom of the protective shell 13 and rotates stably at the bottom of the protective shell 13, providing a convenient point of force application for the operator and preventing axial shift of the rotating shaft 14 during rotation.

[0023] Based on the above embodiments, the following is the complete working principle of the above embodiments: When the low-pressure pump body 1 is working, the piston rod 2 slides in the low-pressure pump body 1. Multiple balls 9 are used to reduce friction during movement. By rotating the handle 4, the connecting block 6 drives the trapezoidal block 7 to slide. While the trapezoidal block 7 is sliding, it drives the expanding cone block 8 to move up and down. At this time, the expanding cone block 8 abuts against the limiting block 10 to diffuse, controlling the pressure of the balls 9 sliding on the inner wall of the low-pressure pump body 1. The sliding resistance can be freely adjusted according to the user's needs to adapt to different working states and different working requirements. By rotating a nut block 16, multiple gears 15 are driven to rotate, making it easier and faster to disassemble the bottom cover 11, increasing work efficiency. At the same time, quick and easy disassembly facilitates the maintenance, cleaning and replacement of the piston rod 2, which is convenient for the maintenance of the overall equipment.

[0024] 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.

[0025] 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.

Claims

1. A modular low-pressure continuous delivery valve, comprising a low-pressure pump body (1), characterized in that: The low-pressure pump body (1) is internally connected to a piston rod (2), and the piston rod (2) has multiple circular grooves (3) on its outer side. The piston rod (2) is rotatably connected to a handle (4), and the handle (4) is provided with a threaded rod (5) on the side close to the piston rod (2).

2. The modular low-pressure continuous delivery valve according to claim 1, characterized in that: The threaded rod (5) is slidably connected to a connecting block (6) on its outer side. A trapezoidal block (7) is provided at the top of the connecting block (6). An expanding conical block (8) is slidably connected to the inside of the piston rod (2). Multiple balls (9) are rotatably connected to the outside of the expanding conical block (8). A limit block (10) is provided inside the piston rod (2).

3. The modular low-pressure continuous delivery valve according to claim 2, characterized in that: The bottom end of the low-pressure pump body (1) is rotatably connected to a bottom cover (11). A toothed ring (12) is provided at the top of the bottom cover (11). Multiple protective shells (13) are provided on the outside of the bottom cover (11). Rotary shafts (14) are rotatably connected inside the multiple protective shells (13). Gears (15) are provided on the outside of the multiple rotating shafts (14). Nut blocks (16) are provided at the bottom of the multiple rotating shafts (14).

4. The modular low-pressure continuous delivery valve according to claim 2, characterized in that: The trapezoidal block (7) is slidably connected to the bottom end of the expanding conical block (8), and the expanding conical block (8) is slidably connected to the outside of the limiting block (10).

5. The modular low-pressure continuous delivery valve according to claim 2, characterized in that: The ball (9) is located on the inner wall of the circular groove (3), and a plurality of the ball (9) are slidably connected to the inner wall of the low-pressure pump body (1).

6. The modular low-pressure continuous delivery valve according to claim 3, characterized in that: The multiple gears (15) are meshed with the gear ring (12), and the threaded rod (5) is rotatably connected inside the piston rod (2).

7. The modular low-pressure continuous delivery valve according to claim 3, characterized in that: The toothed ring (12) is rotatably connected inside the low-pressure pump body (1), and the nut block (16) is rotatably connected to the bottom end of the protective shell (13).

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