High-sealing plug-in mounting type valve string

Abstract

Sealing ring sets are arranged on the inner wall and the outer wall of a core opening and the inner wall and the outer wall of a rod opening, each sealing ring set comprises a soft rubber sealing ring and a hard rubber sealing ring, and the soft rubber sealing rings are softer than the hard rubber sealing rings in material and larger in overall diameter; according to the high-sealing plug-in mounting type valve string, the plug-in mounting type valve string is simplified into the valve seat cylinder, the valve element cylinder piece, the ejector rod piece and the rod sleeve, the overall structure is simplified, and the possibility of structural abnormity is reduced; the soft rubber sealing ring is slightly soft in texture and slightly large in overall diameter, and a main sealing effect is provided; the hard rubber sealing ring is hard in texture and small in overall diameter, the sealing effect is achieved, the soft rubber sealing ring is prevented from being excessively compressed, and the sealing ring set can achieve the structural strength as a whole and meanwhile provide the excellent sealing effect. The sealing effect in the axial direction is improved through the first sealing ring, and the first sealing ring can also be used for buffering when the valve seat cylinder and the valve element cylinder are combined.

Description

Technical Field

[0001] The utility model relates to the field of valve string structures, and particularly to a high-sealing plug-in valve string. Background Art

[0002] In the field of mechanical control, a control valve is a common and widely used fluid control device, playing an important role in hydraulic systems. The control valve regulates the flow direction, flow rate, and even pressure of gases and liquids, and plays a crucial role in many key fields such as industrial automation, chemical production, oil and gas extraction, and water treatment. Through precise manual or automatic operations, the control valve ensures the accuracy, stability, and safety of fluid transmission, and is the fluid control center in modern industrial systems.

[0003] A control valve is composed of core components such as a valve body, a valve flap (also known as a valve core), a valve seat, and an actuator. When the actuator (including but not limited to a manual handle, an electric motor, a pneumatic device, or a hydraulic cylinder) receives an instruction from the control system, it will drive the valve flap to move precisely inside the valve body. This movement will directly change the relative position between the valve flap and the valve seat, thereby effectively opening, safely closing, or precisely adjusting the fluid flow path. This operation process has extremely strict requirements for sealing performance and must ensure stable operation under all working conditions.

[0004] During the working process of the valve string in the control valve, it faces fluids with relatively high temperature and pressure, and it is prone to seal failure. Therefore, the sealing effect of the valve string is relatively important for stable operation and safety. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a high-sealing plug-in valve string, aiming to solve the problem that the valve string of the control valve is prone to seal failure.

[0006] To achieve the above purpose, the utility model provides a high-sealing plug-in valve string, including:

[0007] A valve seat cylinder, with a through-axis formed in the middle, the two ends of the through-axis being a core port and a rod port respectively, and a plurality of first through-ports being annularly arranged in the middle section of the length of the valve seat cylinder.

[0008] A valve core cylinder member, including a valve core cylinder and a first helical spring. A core boss is provided on the outer periphery of the middle section of the length of the valve core cylinder. The first helical spring is sleeved on the valve core cylinder and restricted by the core boss. The valve core cylinder extends into the core port to form a sliding and sealing fit. A flow port is provided at the inner end of the valve core cylinder, and a plurality of second through-ports communicating with the flow port are provided on the peripheral wall of the valve core cylinder. A first sealing ring is provided on the outer wall of the valve core cylinder, and the free end of the valve core cylinder and the valve core cylinder clamp the first sealing ring in the length direction.

[0009] The top rod member includes a top rod and a second helical spring. The top rod extends into the rod opening to form a sliding and sealing fit, and the second helical spring is compressed between the inner wall of the rod opening and the outer wall of the top rod.

[0010] The rod sleeve extends into the rod opening and is sleeved. A blind hole groove and a through hole groove are connected to each other at the central axis of the rod sleeve, and the outer end of the top rod passes through the through hole groove.

[0011] Wherein, sealing ring groups are provided at the inner wall and outer wall of the core opening and the inner wall and outer wall of the rod opening. The sealing ring groups include soft rubber sealing rings and hard rubber sealing rings. The soft rubber sealing rings are softer in material and larger in overall diameter than the hard rubber sealing rings.

[0012] Further, the sealing ring group is provided on the inner wall of the through hole groove.

[0013] Further, the top rod member further includes a screw and a sealing piece. The screw is connected to the end face at the inner end in the length direction of the top rod to fix the sealing piece. Wherein, the sealing piece is arranged corresponding to the inner end of the core opening.

[0014] Further, in the sealing ring groups on the inner wall of the core opening and the inner wall of the rod opening, the soft rubber sealing rings are arranged closer to the middle in the length direction of the valve seat cylinder than the hard rubber sealing rings.

[0015] Further, a third sealing ring is provided on the outer wall of the rod sleeve. When the rod sleeve is combined with the rod opening, the free end of the valve seat cylinder and the rod sleeve clamp the third sealing ring in the length direction.

[0016] Further, the flow port penetrates through the valve core cylinder.

[0017] Further, a threaded structure is provided on the outer wall in the length direction of the rod sleeve.

[0018] Further, the number of the first through ports is four, and they are evenly arranged in a circumferential manner.

[0019] Further, the number of the second through ports is four, and they are evenly arranged in a circumferential manner.

[0020] The highly sealed plug-in valve string submitted by the present utility model simplifies the plug-in valve string into four components: a valve seat cylinder, a valve core cylinder part, a top rod part, and a rod sleeve. This makes the overall structure simple. The fixed method of socketing each component simplifies the installation difficulty and can also reduce the possibility of structural abnormalities. The soft rubber sealing ring has a slightly soft texture and a slightly larger overall diameter, providing the main sealing effect. The hard rubber sealing ring has a slightly hard texture and a slightly smaller overall diameter. While providing a sealing effect, it can prevent the soft rubber sealing ring from being overly compressed. The overall sealing ring group can achieve structural strength while providing excellent sealing effects. The sealing effect in the axial direction is enhanced through the first sealing ring. The material of the first sealing ring can be selected from common choices currently, and specific selection is not restricted. In addition to providing a sealing effect, the first sealing ring can also act as a buffer when the valve seat cylinder and the valve core cylinder are combined. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. 6 is a schematic diagram of the highly sealed plug-in valve string according to the first embodiment of the present utility model;

[0022] Figure 2 FIG. 10 is a cross-sectional schematic diagram of the highly sealed plug-in valve string according to the first embodiment of the present utility model;

[0023] Figure 3 FIG. 14 is a cross-sectional schematic diagram of the valve seat cylinder in the highly sealed plug-in valve string according to the first embodiment of the present utility model;

[0024] Figure 4 is Figure 3 a partial enlargement in

[0025] Figure 5 FIG. 24 is a cross-sectional schematic diagram of the valve core cylinder part in the highly sealed plug-in valve string according to the first embodiment of the present utility model;

[0026] Figure 6 FIG. 28 is a cross-sectional schematic diagram of the top rod part in the highly sealed plug-in valve string according to the first embodiment of the present utility model;

[0027] Figure 7 FIG. 32 is a cross-sectional schematic diagram of the rod sleeve in the highly sealed plug-in valve string according to the first embodiment of the present utility model.

[0028] The realization of the purpose, functional characteristics, and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0030] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the", "above-mentioned", and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model means the presence of the described features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or their groups. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more of the associated listed items.

[0031] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical terms and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which the present utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as herein.

[0032] Referring to Figures 1 to 7 , in an embodiment of the present utility model, a highly sealed plug-in valve string includes:

[0033] A valve seat cylinder 100, with a through-axis 110 formed in the middle. The two ends of the through-axis 110 are respectively a core port 111 and a rod port 112. A plurality of first through-ports 113 are annularly arranged in the middle section of the length of the valve seat cylinder 100.

[0034] A valve core cylinder member 200, including a valve core cylinder 210 and a first helical spring 220. A core boss 211 is provided on the outer periphery of the middle section of the length of the valve core cylinder 210. The first helical spring 220 is sleeved on the valve core cylinder 210 and restricted by the core boss 211. The valve core cylinder 210 extends into the core port 111 to form a sliding and sealing fit. A flow port 212 is provided at the inner end of the valve core cylinder 210. A plurality of second through-ports 213 leading to the flow port 212 are provided on the peripheral wall of the valve core cylinder 210. A first sealing ring 214 is provided on the outer wall of the valve core cylinder 210. When the valve core cylinder 210 is combined with the core port 111, the free end of the valve core cylinder 210 and the valve core cylinder 210 clamp the first sealing ring 214 in the length direction.

[0035] The top rod member 300 includes a top rod 310 and a second helical spring 320. The top rod 310 extends into the rod opening 112 to form a sliding and sealing fit. The second helical spring 320 is compressed between the inner wall of the rod opening 112 and the outer wall of the top rod 310.

[0036] The rod sleeve 400 extends into the rod opening 112 and is sleeved. A blind hole groove 410 and a through hole groove 420 are connected to each other at the central axis of the rod sleeve 400. The outer end of the top rod 310 passes through the through hole groove 420.

[0037] Wherein, a seal ring group 500 is arranged on the inner wall and outer wall of the core opening 111 and the inner wall and outer wall of the rod opening 112. The seal ring group 500 includes a soft rubber seal ring 510 and a hard rubber seal ring 520. The soft rubber seal ring 510 is softer in material and larger in overall diameter than the hard rubber seal ring 520.

[0038] In the prior art, during the working process of the valve string in the control valve, it faces fluids with relatively high temperature and pressure, and it is easy to have the situation of seal failure. Then the sealing effect of the valve string is relatively important for stable operation and safety.

[0039] In the present utility model, generally, the valve seat cylinder 100 is fixedly clamped in the base to form a fixation. A through shaft 110 penetrates through the middle of the valve seat cylinder 100. The two ends of the through shaft 110 are respectively a core opening 111 and a rod opening 112, providing a basis for the subsequent installation of the valve core cylinder 210 and the top rod 310. A plurality of first through openings 113 can be circumferentially arranged in the middle of the valve seat cylinder 100 in the length direction. The first through openings 113 are the passing positions of the fluid. The core opening 111 and the rod opening 112 are not limited to having a uniform inner diameter. For example, the core opening 111 is formed with multiple sections that are sequentially connected and have an increasing inner diameter from the inside to the outside, forming a multi-step structure to optimize the installation.

[0040] The valve core cylinder member 200 includes a valve core cylinder 210 and a first helical spring 220. A core boss 211 is arranged on the outer periphery of the middle section of the valve core cylinder 210 in the length direction. The first helical spring 220 is sleeved on the valve core cylinder 210 and is restricted by the core boss 211. The valve core cylinder 210 extends into the core opening 111 to form a sliding and sealing fit. A fluid passage opening 212 is arranged at the inner end of the valve core cylinder 210. A plurality of second through openings 213 that conduct to the fluid passage opening 212 are arranged on the peripheral wall of the valve core cylinder 210. A first seal ring 214 is arranged on the outer wall of the valve core cylinder 210. When the valve core cylinder 210 is combined with the core opening 111, the free end of the valve core cylinder 210 and the valve core cylinder 210 clamp the first seal ring 214 in the length direction. The sealing effect in the axial direction is improved through the first seal ring 214. The material of the first seal ring 214 can be selected from the currently common options, and it is not specifically limited. The first seal ring 214 can also serve as a buffer when the valve seat cylinder 100 and the valve core cylinder 210 are combined in addition to providing a sealing effect.

[0041] The top rod member 300 includes a top rod 310 and a second helical spring 320. The top rod 310 extends into the rod port 112 to form a sliding and sealing fit. The second helical spring 320 is compressed between the inner wall of the rod port 112 and the outer wall of the top rod 310. For example, a rod boss is provided on the outer wall of the top rod 310 to provide a base for the installation of one end of the second helical spring 320; a step is formed on the inner wall of the rod port 112 to provide a base for the installation of the other end of the second helical spring 320.

[0042] The rod sleeve 400 extends into the rod port 112 and is sleeved. A blind hole groove 410 and a through hole groove 420 which are connected to each other are provided at the central axis of the rod sleeve 400. The outer end of the top rod 310 passes through the through hole groove 420.

[0043] Seal ring groups 500 are provided at the inner wall and outer wall of the core port 111 and the inner wall and outer wall of the rod port 112. The seal ring groups 500 include a soft rubber seal ring 510 and a hard rubber seal ring 520. The soft rubber seal ring 510 is softer in material and larger in overall diameter than the hard rubber seal ring 520. The soft rubber seal ring 510 is slightly softer in texture and slightly larger in overall diameter, so it provides the main sealing effect; the hard rubber seal ring 520 is slightly harder in texture and slightly smaller in overall diameter, so while providing a sealing effect, it can prevent the soft rubber seal ring 510 from being overly compressed. The seal ring groups 500 can achieve structural strength as a whole while providing excellent sealing effects.

[0044] When the plug-in valve string completes its own assembly, it can be integrally installed into the base of the control valve. In the natural state, the first helical spring 220 provides a tendency to press the valve core cylinder 210 towards the valve seat cylinder 100, and the second helical spring 320 provides a tendency to separate the top rod 310 from the valve seat cylinder 100. When the fluid pressure introduced at the position of the first port 113 increases, the first helical spring 220 is compressed, and the valve core cylinder 210 slides outwards from the valve seat cylinder 100 until the second port 213 is exposed from the valve seat cylinder 100, at which time the fluid can be conducted. When it is necessary to block the fluid in the plug-in valve string, the top rod 310 is driven to move towards the valve seat cylinder 100 against the elastic force of the second helical spring 320 until it is closed.

[0045] In summary, the plug-in valve string is simplified into four components, namely the valve seat tube 100, the valve core tube 200, the top rod 300 and the rod sleeve 400, so that the overall structure is simplified, and the socket fixing method of each component simplifies the installation difficulty and reduces the possibility of structural abnormalities; the soft rubber sealing ring 510 is slightly softer in texture and has a slightly larger overall diameter, so it provides a main sealing effect; the hard rubber sealing ring 520 is slightly harder in texture and has a slightly smaller overall diameter, so while providing a sealing effect, it can avoid the soft rubber sealing ring 510 from being over-compressed, and the sealing ring group 500 as a whole can achieve structural strength while providing excellent sealing effect; the first sealing ring 214 is used to improve the sealing effect in the axial direction. The material of the first sealing ring 214 can be selected from the currently common options, which are not specifically limited. In addition to providing a sealing effect, the first sealing ring 214 can also serve as a buffer when the valve seat tube 100 and the valve core tube 210 are combined.

[0046] Reference Figures 1 to 7 In one embodiment, the sealing ring assembly 500 is disposed on the inner wall of the through hole groove 420 .

[0047] In this embodiment, the sealing effect at the position of the rod sleeve 400 is improved by the sealing ring group 500 at the position.

[0048] Reference Figures 1 to 7 In one embodiment, the top rod 300 further includes a screw 330 and a sealing sheet 340 , wherein the screw 330 is connected to the end surface of the inner end of the top rod 310 in the length direction to fix the sealing sheet 340 , wherein the sealing sheet 340 is arranged corresponding to the inner end of the core opening 111 .

[0049] In this embodiment, the introduction of the sealing sheet 340 enables the top rod 300 to provide a more superior sealing effect. Specifically, the screw 330 is connected to the top rod 310 to fix the annular sealing sheet 340. The sealing sheet 340 can be made of a high temperature resistant material such as graphite.

[0050] Reference Figures 1 to 4 In one embodiment, in the sealing ring group 500 on the inner wall of the core opening 111 and the inner wall of the stem opening 112 , the soft rubber sealing ring 510 is arranged near the middle of the length direction of the valve seat tube 100 relative to the hard rubber sealing ring 520 .

[0051] In this embodiment, by arranging the soft rubber sealing ring 510 in the sealing ring set 500 at a specific position close to the middle, during the installation of the valve core tube 210 and the push rod 310, the hard rubber sealing ring 520 is contacted first, and then the soft rubber sealing ring 510 is contacted. The slightly smaller diameter of the hard rubber sealing ring 520 can guide the installation and avoid the installation problems caused by contacting the soft rubber sealing ring 510 first.

[0052] Reference Figures 1 to 7 In one embodiment, a third sealing ring 430 is provided on the outer wall of the rod sleeve 400. When the rod sleeve 400 is combined with the rod port 112, the free end of the valve seat cylinder 100 and the rod sleeve 400 clamp the third sealing ring 430 in the length direction.

[0053] In this embodiment, the axial sealing effect is improved by the third sealing ring 430. The material of the third sealing ring 430 can be selected from common choices currently, and is not specifically limited.

[0054] In one embodiment, the fluid passage port 212 penetrates through the valve core cylinder 210.

[0055] In this embodiment, the fluid passage port 212 penetrates through the entire valve core cylinder 210, so that corresponding parts can be added at the outer ends in the length direction of the valve core cylinder 210, providing a basis for diversified control.

[0056] In one embodiment, a threaded structure is provided on the outer wall in the length direction of the rod sleeve 400.

[0057] In this embodiment, through the setting of the external thread structure of the rod sleeve 400 above, other related components can be conveniently connected. For example, the rod sleeve 400 can be conveniently disassembled from the base of the entire control valve.

[0058] In one embodiment, the number of the first through ports 113 is four, and they are evenly arranged in a circumferential manner.

[0059] In this embodiment, the number and the setting position of the first through ports 113 are restricted, so that the fluid runs more smoothly during operation. The diameter of the first through ports 113 can be adjusted according to the actual use state.

[0060] In one embodiment, the number of the second through ports 213 is four, and they are evenly arranged in a circumferential manner.

[0061] In this embodiment, the number and the setting position of the second through ports 213 are restricted, so that the fluid runs more smoothly during operation. The diameter of the second through ports 213 can be adjusted according to the actual use state.

[0062] In summary, for the highly sealed plug-in valve string submitted by the present utility model, the plug-in valve string is streamlined into four components: a valve seat cylinder 100, a valve core cylinder part 200, a top rod part 300, and a rod sleeve 400, which simplifies the overall structure. The fixed manner of socketing of each component simplifies the installation difficulty and can also reduce the possibility of structural abnormalities; the soft rubber sealing ring 510 has a slightly soft texture and a slightly larger overall diameter, so it provides the main sealing effect; the hard rubber sealing ring 520 has a slightly hard texture and a slightly smaller overall diameter, so while providing a sealing effect, it can prevent the soft rubber sealing ring 510 from being overly compressed. The sealing ring group 500 can achieve structural strength as a whole and provide excellent sealing effects; the sealing effect in the axial direction is improved through the first sealing ring 214. The material of the first sealing ring 214 can be selected from common choices currently, and specific selection is not limited. In addition to providing a sealing effect, the first sealing ring 214 can also serve as a buffer when the valve seat cylinder 100 is combined with the valve core cylinder 210.

[0063] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A high-seal cartridge valve train, characterized in that: include: The valve seat cylinder has a through shaft formed in the middle, and the two ends of the through shaft are respectively a core opening and a rod opening. A plurality of first through openings are arranged in the middle of the length of the valve seat cylinder. A valve core barrel component, comprising a valve core barrel and a first coil spring, wherein a core boss is arranged on the outer periphery of the middle section of the length of the valve core barrel, the first coil spring is sleeved on the valve core barrel and limited by the core boss, the valve core barrel extends into the core opening to form a sliding and sealing fit, a flow channel opening is arranged at the inner end of the valve core barrel, a plurality of second openings leading to the flow channel opening are arranged on the peripheral wall of the valve core barrel, a first sealing ring is arranged on the outer wall of the valve core barrel, and the free end of the valve core barrel and the valve core barrel clamp the first sealing ring in the length direction; A push rod member, comprising a push rod and a second coil spring, wherein the push rod extends into the rod opening to form a sliding and sealing fit, and the second coil spring is compressed between the inner wall of the rod opening and the outer wall of the push rod; A rod sleeve is inserted into the rod opening and sleeved, wherein the central axis of the rod sleeve is provided with a blind hole groove and a through hole groove connected to each other, and the outer end of the top rod passes through the through hole groove; Among them, a sealing ring group is arranged on the inner wall and outer wall of the core opening and the inner wall and outer wall of the rod opening, and the sealing ring group includes a soft rubber sealing ring and a hard rubber sealing ring. The soft rubber sealing ring is softer than the hard rubber sealing ring and has a larger overall diameter.

2. The high-seal cartridge valve train according to claim 1, characterized in that: The sealing ring group is arranged on the inner wall of the through hole groove.

3. The high-seal cartridge valve train according to claim 1, characterized in that: The push rod also includes a screw and a sealing sheet, wherein the screw is connected to the end surface of the inner end of the push rod in the length direction to fix the sealing sheet, wherein the sealing sheet is arranged corresponding to the inner end of the core opening.

4. The high-seal cartridge valve train according to claim 1, characterized in that: In the sealing ring group on the inner wall of the core opening and the inner wall of the stem opening, the soft rubber sealing ring is arranged closer to the middle part of the length direction of the valve seat tube relative to the hard rubber sealing ring.

5. The high-seal cartridge valve train according to claim 1, characterized in that: A third sealing ring is arranged on the outer wall of the rod sleeve. When the rod sleeve is combined with the rod port, the free end of the valve seat tube and the rod sleeve clamp the third sealing ring in the length direction.

6. The high-seal cartridge valve train according to any one of claims 1 to 5, characterized in that: The flow passage passes through the valve core tube.

7. The high-seal cartridge valve train according to any one of claims 1 to 5, characterized in that: The outer wall of the rod sleeve in the length direction is provided with a thread structure.

8. The high-seal cartridge valve train according to any one of claims 1 to 5, characterized in that: The number of the first openings is four and they are evenly arranged around the periphery.

9. The high-seal cartridge valve train according to any one of claims 1 to 5, characterized in that: The number of the second openings is four and they are evenly arranged around the periphery.

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