Novel pneumatic antibiotic stop valve

Abstract

The utility model discloses a novel pneumatic antibiotic stop valve which comprises a valve body, a valve rod, a valve rod, a valve rod, a valve rod and a valve rod. The valve body is fixedly connected with the valve cover, the valve cover covers the upper end opening to form a sealed valve cavity, and a packing pressing sleeve is arranged in the valve cover; the valve rod is installed in the valve cavity, the valve rod penetrates through the valve cover and is matched with the packing pressing sleeve, and a valve clack is installed at the bottom of the valve rod; the air cylinder is installed on the valve cover, and the valve rod is connected with a piston rod of the air cylinder, so that the valve rod is driven by the piston rod to move in the axial direction, and the valve clack is driven to be opened and closed. The sealing performance of the stop valve is improved, medium retention caused by dead angles of the structure and the flow channel is reduced, and the risk of bacterial contamination is reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve body technology, specifically to a novel pneumatic antibiotic shut-off valve. Background Technology

[0002] Antibiotic shut-off valves, also known as sanitary shut-off valves or pharmaceutical-grade shut-off valves, are widely used in industries with high hygiene requirements, such as bio-fermentation, antibiotic production, biopharmaceuticals, and chemical pharmaceuticals. The key to designing these valves is to meet stringent hygiene standards and aseptic requirements to prevent contamination and ensure product purity.

[0003] Chinese patent document (publication number: CN214404712U) discloses an antibiotic shut-off valve, which includes a valve body, a valve cover, a valve stem, a valve disc, and a sealing assembly. The valve disc is connected to the valve stem via the valve disc cover, and a check washer and an O-ring are provided at the connection. Due to the multiple connection structures between the valve disc cover and the valve stem, installation gaps are easily formed, resulting in an unstable overall sealing structure and insufficient sealing performance. The valve body structure and flow channel design have many dead angles, which can easily cause media stagnation and increase the risk of bacterial contamination.

[0004] Therefore, providing a novel pneumatic antibiotic shut-off valve to improve sealing and reduce media stagnation caused by dead zones has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] Therefore, this utility model provides a novel pneumatic antibiotic shut-off valve to solve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This utility model provides a novel pneumatic antibiotic shut-off valve, comprising:

[0008] The valve body has a straight internal channel and an opening at the top.

[0009] The valve cover is fixedly connected to the valve body, and the valve cover covers the upper opening to form a sealed valve cavity. A packing sleeve is provided inside the valve cover.

[0010] A valve stem is installed inside the valve cavity, passes through the valve cover, and cooperates with the packing sleeve. A valve disc is installed at the bottom of the valve stem.

[0011] A cylinder is mounted on the valve cover, and the valve stem is connected to the piston rod of the cylinder so that the valve stem can be driven to move axially through the piston rod, thereby driving the valve disc to open and close.

[0012] During the opening of the gate valve, pressurized gas enters the lower chamber of the cylinder, pushing the piston rod upward. The piston rod, through the connecting sleeve, drives the valve rod upward, causing the valve disc to leave the valve seat, allowing fluid to flow smoothly through the valve body's passage. If the gate valve spring fails or cannot close for other reasons, pressurized gas enters the upper chamber of the cylinder, pushing the piston rod downward. The piston rod, through the connecting sleeve, drives the valve rod downward, causing the valve disc to come into tight contact with the valve seat, cutting off the fluid flow and preventing it from passing through the valve body's passage. This closes the valve in special circumstances, ensuring valve safety. The straight-channel design of the valve body reduces media stagnation points, facilitating cleaning and polishing, and lowering the risk of contamination. The cooperation between the valve cover and the packing sleeve ensures the valve's sealing performance and prevents leakage. The piston rod of the cylinder drives the valve rod to open and close the valve disc, making operation simple and highly reliable. This improves the gate valve's sealing performance, reduces media stagnation caused by structural and flow channel dead angles, and lowers the risk of contamination.

[0013] In some embodiments, a flow-guiding arc surface is provided at the internal junction of the valve body and the valve cover.

[0014] In some embodiments, the valve body and the valve cover are fixedly connected by bolts.

[0015] In some embodiments, the cylinder is fixed to the valve cover by a bracket.

[0016] In some embodiments, the upper cover of the cylinder has an air source hole.

[0017] In some embodiments, the packing sleeve is fitted between the valve stem and the center hole of the valve cover, a sealing ring is provided between the valve cover and the packing sleeve, and a ring groove is provided on the packing sleeve, with the sealing ring embedded in the ring groove.

[0018] In some embodiments, the packing sleeve is provided with assembly auxiliary holes.

[0019] In some embodiments, a piston rod guide sleeve is provided between the piston rod of the cylinder and the bracket.

[0020] In some embodiments, a valve stem guide sleeve is provided between the valve stem and the valve cover.

[0021] In some embodiments, the novel pneumatic antibiotic shut-off valve further includes:

[0022] A connecting sleeve is provided, through which the piston rod and the valve rod are connected. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] Figure 1 A schematic diagram of the structure of the novel pneumatic antibiotic shut-off valve provided by this utility model;

[0026] Figure 2 This is a schematic diagram of the packing sleeve in the novel pneumatic antibiotic shut-off valve provided by this utility model.

[0027] Figure 3 for Figure 2 A cross-sectional view along the AA direction.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Valve body; 2. Valve disc; 3. Guide arc surface; 4. Valve stem guide sleeve; 5. Valve cover;

[0030] 6. Packing sleeve; 61. Ring groove; 62. Assembly auxiliary hole; 7. Connecting sleeve; 8. Bracket;

[0031] 9. Piston rod guide sleeve; 10. Top cover; 11. Air source hole. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] To overcome the shortcomings of existing technologies, this utility model aims to provide a novel pneumatic antibiotic shut-off valve with optimized structure, no dead angles, easy polishing, and effective prevention of media retention and bacterial contamination. Furthermore, the valve features a simple design, superior stem guiding performance, and supports single-acting and double-acting modes to adapt to different production needs.

[0034] In general, this utility model is a novel pneumatic antibiotic shut-off valve, mainly composed of a valve stem and valve disc assembly, a valve body 1, a valve cover 5, a packing sleeve 6, a piston rod, a connecting sleeve 7, a bracket 8, and a cylinder. The valve body 1 adopts a straight channel design for easy polishing; the guide port of the valve stem and valve disc assembly guides the flow of the medium and prevents stagnation; the valve body 1 and valve cover 5 have an internal arc transition, and a guide arc surface 3 is designed to reduce dead angles; the extended packing section isolates the internal and external environments; the simplified packing sleeve 6 saves installation space and adds an O-ring to enhance sealing; the guide sleeve and connecting sleeve 7 ensure precise movement of the piston rod and valve stem along the central axis; the air source hole 11 on the upper cover 10 of the cylinder realizes the switching between single and double action modes and emergency closure.

[0035] In one specific implementation, such as Figures 1-3 As shown, the novel pneumatic antibiotic shut-off valve provided by this utility model includes a valve body 1, a valve cover 5, a valve stem, and a cylinder. The valve body 1 has a straight internal channel with an upper opening. The valve body 1 is fixedly connected to the valve cover 5, which covers the upper opening to form a sealed valve cavity. A packing sleeve 6 is provided inside the valve cover 5. The valve stem is installed inside the valve cavity, passing through the valve cover 5 and engaging with the packing sleeve 6. A valve disc 2 is installed at the bottom of the valve stem. The cylinder is mounted on the valve cover 5, and the valve stem is connected to the piston rod of the cylinder, so that the piston rod drives the valve stem to move axially, thereby opening and closing the valve disc 2.

[0036] During the opening of the gate valve, pressurized gas in the cylinder enters the lower chamber, pushing the piston rod upward. The piston rod, through the connecting sleeve 7, moves the valve rod upward, causing valve disc 2 to leave the valve seat, allowing fluid to flow smoothly through the channel of valve body 1. During the closing of the gate valve, pressurized gas in the cylinder enters the upper chamber, pushing the piston rod downward. The piston rod, through the connecting sleeve 7, moves the valve rod downward, causing valve disc 2 to come into close contact with the valve seat, cutting off the fluid flow and preventing it from passing through the channel of valve body 1. This design, with its straight channel in valve body 1, reduces media stagnation points, facilitating cleaning and polishing, and lowering the risk of contamination. The cooperation between valve cover 5 and packing sleeve 6 ensures the valve's sealing performance and prevents leakage. The piston rod of the cylinder moves the valve rod, realizing the opening and closing of valve disc 2, making operation simple and highly reliable. This improves the sealing performance of the gate valve, reduces media stagnation caused by structural and flow channel dead angles, and lowers the risk of contamination.

[0037] A flow-guiding arc surface 3 is provided at the internal interface between the valve body 1 and the valve cover 5. During the opening and closing of the valve disc 2, the flow-guiding arc surface 3 can guide the fluid to transition smoothly, reducing turbulence and stagnation at the interface between the valve body 1 and the valve cover 5, further reducing the risk of bacterial contamination, optimizing fluid dynamics performance, and reducing fluid resistance. The shape of the flow-guiding arc surface 3 can be optimized according to fluid dynamics simulation to achieve the best fluid guiding effect. The flow-guiding arc surface 3 can be polished to further reduce media stagnation.

[0038] The valve body 1 and the valve cover 5 are fixedly connected by bolts. The bolt connection ensures that the valve body 1 and the valve cover 5 remain tightly connected during the opening and closing of the valve disc 2, preventing loosening due to pressure changes and ensuring sealing performance. A sealing gasket can also be placed between the valve body 1 and the valve cover 5 to further enhance the sealing performance. The bolts can be made of high-strength stainless steel or other corrosion-resistant materials to adapt to different working environments.

[0039] The cylinder is fixed to the valve cover 5 by a bracket 8. The bracket 8 provides stable support during cylinder operation, ensuring that the piston rod of the cylinder can smoothly drive the valve stem, preventing displacement due to external forces, ensuring the stability of the cylinder's installation position, and preventing loosening of the connection between the cylinder and the valve cover 5 due to external forces, thus improving the overall stability of the valve. The bracket 8 can be made of high-strength aluminum alloy or other lightweight materials to reduce the overall weight of the valve. The bracket 8 and the valve cover 5 can be connected by welding or bolts, depending on the actual requirements.

[0040] Furthermore, the upper cover 10 of the cylinder is provided with an air source hole 11. In an emergency, an external air source can be connected through the air source hole 11 to quickly inflate the upper chamber of the cylinder, pushing the piston rod downward to close the valve in an emergency and ensure the safe operation of the production system. The air source hole 11 on the upper cover 10 of the cylinder can also realize the switching between single and double action modes, expanding the scope of application.

[0041] Multiple assembly auxiliary holes 62 are provided on the end face of the packing sleeve 6 to simplify the structure of the packing sleeve and save installation space. The packing sleeve 6 is fitted between the valve stem and the center hole of the valve cover 5. A sealing ring is provided between the valve cover 5 and the packing sleeve 6. A ring groove 61 is provided on the packing sleeve 6, and the sealing ring is embedded in the ring groove 61. During the up and down movement of the valve stem, the packing sleeve 6 is tightly fitted with the valve cover 5 through the sealing ring to prevent the medium from leaking from the gap between the valve stem and the valve cover 5. At the same time, the design of the ring groove 61 of the packing sleeve 6 ensures that the sealing ring maintains a stable position under pressure, further enhancing the sealing effect. The sealing ring can be made of high-temperature resistant and corrosion-resistant materials, such as polytetrafluoroethylene (PTFE), and the packing can be made of PTFE or other high-performance sealing materials to adapt to different working conditions.

[0042] To save space and reduce costs, the packing sleeve is provided with assembly auxiliary holes for assembly. During the assembly process, the threads machined directly on the outside of the packing sleeve are screwed onto the valve cover. Then, when tightening the packing sleeve, a specific wrench is used in conjunction with the auxiliary holes to tighten the packing sleeve.

[0043] Furthermore, a piston rod guide sleeve 9 is provided between the piston rod of the cylinder and the bracket 8; during the up-and-down movement of the piston rod, the piston rod guide sleeve 9 ensures that the piston rod moves accurately along the axial direction, reduces friction between the piston rod and the cylinder, and improves the service life and movement accuracy of the piston rod. The guide sleeve can be made of wear-resistant materials, such as PTFE, stainless steel 304, or stainless steel 316, and a lubrication device, such as an oil groove or grease, can be provided inside the guide sleeve to further reduce friction.

[0044] Similarly, a valve stem guide sleeve 4 is provided between the valve stem and the valve cover 5; during the up-and-down movement of the valve stem, the valve stem guide sleeve 4 ensures that the valve stem moves accurately along the axial direction, reduces friction between the valve stem and the valve cover 5, and improves the service life and movement accuracy of the valve stem. The guide sleeve can be made of wear-resistant materials, such as PTFE, stainless steel 304, or stainless steel 316. A lubrication device, such as an oil groove or grease, can be provided inside the guide sleeve to further reduce friction.

[0045] Furthermore, the novel pneumatic antibiotic shut-off valve also includes a connecting sleeve 7, through which the piston rod and the valve rod are connected. During the up-and-down movement of the piston rod in the cylinder, the connecting sleeve 7 ensures a firm and reliable connection between the piston rod and the valve rod, smoothly transmitting the movement of the piston rod to the valve rod, thus realizing the opening and closing action of the valve disc 2. The connecting sleeve 7 ensures a firm and reliable connection between the piston rod and the valve rod, facilitating disassembly and maintenance, while ensuring transmission efficiency. The connecting sleeve 7 can be made of high-strength aluminum alloy or other lightweight materials to reduce the overall weight of the valve. The connecting sleeve 7 can be connected to the piston rod and valve rod via threads or welding, with the specific method selected according to actual needs.

[0046] In the above specific embodiments, the novel pneumatic antibiotic shut-off valve provided by this utility model features a straight-channel design inside the valve body 1, which facilitates casting and polishing, reduces media retention points, and makes cleaning and disinfection easier. The valve stem and valve disc assembly are innovatively designed with a flow guide port, which effectively guides media flow, prevents media retention within the valve body 1, and significantly reduces the risk of contamination. The junction between the valve body 1 and the valve cover 5 uses a smooth arc transition (flow guide arc surface 3), which also reduces the possibility of media retention. The packing section length is carefully designed to ensure that its length is greater than the valve stem opening length. The valve body features a high-quality packing sleeve 6, which effectively isolates the valve's internal structure from the external environment, preventing contamination. This simplified design facilitates assembly and includes an auxiliary assembly hole 62, saving installation space, reducing costs, and ensuring a reliable seal with added O-rings. Both the piston rod and valve stem are equipped with guide sleeves to ensure precise movement along the valve body's central axis. The clamping sleeve 7 incorporates an anti-rotation mechanism, enhancing the overall stability and sealing of the valve. The cylinder's upper cover 10 has an air source hole 11, allowing for emergency valve closure via an external air source in case of spring failure, ensuring safe and flexible operation of the production system. The optimized internal structure, with no dead corners, effectively prevents media retention and contamination.

[0047] This novel pneumatic antibiotic shut-off valve has at least the following technical advantages:

[0048] Ease of polishing: The simplified shape of components such as valve cover 5 and valve body 1 facilitates comprehensive polishing and reduces production costs;

[0049] Sealing performance: The valve stem has good guiding properties, and the guide sleeve design ensures excellent valve sealing performance;

[0050] Multi-purpose: The air source port 11 on the cylinder cover allows the valve to switch between single and double action modes to adapt to different application scenarios.

[0051] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this utility model should be included within the scope of protection of this utility model.

Claims

1. A novel pneumatic antibiotic shut-off valve, characterized in that, include: The valve body has a straight internal channel and an opening at the top. The valve cover is fixedly connected to the valve body, and the valve cover covers the upper opening to form a sealed valve cavity. A packing sleeve is provided inside the valve cover. A valve stem is installed inside the valve cavity, passes through the valve cover, and cooperates with the packing sleeve. A valve disc is installed at the bottom of the valve stem. A cylinder is mounted on the valve cover, and the valve stem is connected to the piston rod of the cylinder so that the valve stem can be driven to move axially through the piston rod, thereby driving the valve disc to open and close.

2. The novel pneumatic antibiotic shut-off valve according to claim 1, characterized in that, A flow-guiding arc surface is provided at the internal junction of the valve body and the valve cover.

3. The novel pneumatic antibiotic shut-off valve according to claim 1, characterized in that, The cylinder has an air source hole on its upper cover.

4. The novel pneumatic antibiotic shut-off valve according to claim 1, characterized in that, The packing sleeve is fitted between the valve stem and the center hole of the valve cover. A sealing ring is provided between the valve cover and the packing sleeve. A ring groove is opened on the packing sleeve, and the sealing ring is embedded in the ring groove.

5. The novel pneumatic antibiotic shut-off valve according to claim 1, characterized in that, The packing sleeve is provided with assembly auxiliary holes.

6. The novel pneumatic antibiotic shut-off valve according to claim 1, characterized in that, The valve body and the valve cover are fixedly connected by bolts.

7. The novel pneumatic antibiotic shut-off valve according to claim 1, characterized in that, The cylinder is fixed to the valve cover by a bracket.

8. The novel pneumatic antibiotic shut-off valve according to claim 7, characterized in that, A piston rod guide sleeve is provided between the piston rod of the cylinder and the bracket.

9. The novel pneumatic antibiotic shut-off valve according to claim 1, characterized in that, A valve stem guide sleeve is provided between the valve stem and the valve cover.

10. The novel pneumatic antibiotic shut-off valve according to claim 1, characterized in that, Also includes: A connecting sleeve is provided, through which the piston rod and the valve rod are connected.

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