Three group valve structure based on online sampling discharge function

Abstract

The three-group valve structure based on online sampling discharge function comprises a valve body, a medium inlet and a medium outlet arranged in the valve body, a first ball valve, a second ball valve and a third ball valve arranged between the medium inlet and the medium outlet, a T-shaped flow channel arranged on the second ball valve, and a sampling channel comprising a sampling chamber communicated with the sampling channel when front-end sampling or rear-end sampling is needed; the T-shaped flow channel is communicated with the first ball valve and the third ball valve on the two sides when discharge is needed. Through the technical scheme, the three functions of cutting, online sampling and discharge are integrated in the same valve body, all operations can be completed only through three series ball valves and a T-shaped flow channel, without external additional sampling valves or discharge valves, so that the pipeline arrangement and operation steps are simplified; the second ball valve can be rotated to switch among the four states of "normal flow", "front-end sampling", "rear-end sampling" and "discharge", one valve is used for multiple purposes, and the on-site operation is more intuitive and efficient.

Description

Technical Field

[0001] This utility model relates to a three-valve structure based on online sampling and emission function, and belongs to the field of valves. Background Technology

[0002] In actual industrial pipelines and chemical processes, multiple valve combinations are often used to achieve online sampling, monitoring, and periodic discharge of media, thus accomplishing functions such as shut-off, sampling, and discharge. Currently, widely used combination valves typically consist of multiple individual valves (such as gate valves, ball valves, and discharge valves) connected by flanges or threaded pipelines. However, existing combination valves suffer from incomplete online sampling and discharge capabilities, high manufacturing costs, and the need for separate procurement and inspection of multiple valves and connectors, leading to cumulative costs. Furthermore, the numerous pipeline interfaces and sealing points increase the risk of leakage and subsequent maintenance costs. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a three-valve structure based on online sampling and emission function, which aims to solve the problems of limited functionality and high cost of existing multi-valve systems.

[0004] The three-valve structure based on online sampling and discharge function includes a valve body, which has a medium inlet and a medium outlet. A first ball valve, a second ball valve, and a third ball valve are arranged between the medium inlet and the medium outlet. The second ball valve has a T-shaped flow channel, which includes a sampling channel. The sampling channel is connected to a sampling chamber when front-end sampling or back-end sampling is required. When discharge is required, the T-shaped flow channel is connected to the first ball valve and the third ball valve on both sides.

[0005] This technical solution integrates three functions—shutdown, online sampling, and discharge—into a single valve body. All operations can be completed using only three ball valves in series and a T-shaped flow channel, eliminating the need for external sampling or discharge valves and simplifying pipeline layout and operation. Rotating the second ball valve allows switching between four states: "normal flow," "front-end sampling," "back-end sampling," and "discharge," making the valve multi-functional and providing more intuitive and efficient on-site operation. The integrated valve body design reduces the number of external connections such as flanges, threaded fittings, and seals, thus reducing component procurement and inspection costs. Shortening the total pipeline length and reducing the number of interfaces not only lowers material costs but also shortens assembly and commissioning time.

[0006] Preferably, the T-shaped flow channel further includes a first flow channel and a second flow channel located on both sides of the sampling channel. The first flow channel, the second flow channel, and the sampling channel form four state stations through rotation, including a conveying station, a front-end sampling station, a rear-end sampling station, and a discharge station.

[0007] This technical solution allows for free switching between four workstations by rotating the second ball valve, with each workstation having a corresponding flow channel connection state. This avoids the risk of misoperation caused by the cumbersome valve replacement or switching operations in traditional multi-valve combinations. The first flow channel corresponds to the front-end sampling workstation, and the second flow channel corresponds to the rear-end sampling workstation. The operator only needs to rotate to the corresponding position to accurately select the sampling point, meeting the monitoring needs of various process parameters. The flow channel layout of the four workstations is reasonable, and the fluid will not form dead corners or blind spots in the cavity during the switching process. This ensures the representativeness of the sampling and effectively avoids secondary pollution or scaling caused by long-term retention.

[0008] Preferably, both the first ball valve and the third ball valve include a valve seat, a valve stem, and a valve core located at the bottom of the valve stem. The valve seat has a retaining ring at its rear end, a snap-fit ​​groove at its rear side, a sealing component in the snap-fit ​​groove, a pushing ring at the rear of the sealing component, a pushing groove on the pushing ring, and a first elastic element in the pushing groove. The valve seat continuously abuts against the valve core under the pushing of the first elastic element to form a sealed connection.

[0009] This technical solution, by incorporating a push ring and a first elastic element at the rear end of the valve seat, ensures a constant tight contact between the valve seat and the valve core. Even after repeated opening and closing or exposure to erosion and wear from the medium, the elastic element automatically compensates for any gaps, guaranteeing a long-lasting and stable sealing performance. The composite structure of the sealing components and the push ring within the snap-fit ​​groove provides multiple layers of leak protection. Even under high pressure, high temperature, or corrosive media conditions, the continuous action of the elastic element maintains a reliable valve stem-seat sealing connection, reducing the risk of media leakage.

[0010] Furthermore, the sealing component includes a first elastic ring, on which a transversely arranged receiving groove is provided. A second elastic element is provided in the receiving groove. The second elastic element is annularly arranged and sleeved in the receiving groove, so that the upper side of the first elastic ring deforms and abuts against the valve body to form a sealing connection, and the lower side deforms and abuts against the fixing ring to form a sealing connection.

[0011] Through this technical solution, the first elastic ring deforms upwards towards the valve body and downwards towards the fixed ring under the compression of the second elastic element, forming a double sealing surface. This effectively prevents the mutual penetration of media on both sides of the valve body, improving sealing reliability. The annular second elastic element forms a ring-shaped spring structure around the receiving groove, enabling the sealing component to withstand higher working pressures. At the same time, due to the limitations of the groove structure, the leakage path is more tortuous, significantly reducing the risk of media leakage.

[0012] Furthermore, the upper and lower sides of the receiving groove are provided with protrusions, which are arranged in an arc shape so that the opening of the receiving groove is in a constricted state.

[0013] This technical solution utilizes an arc-shaped protrusion to create a pre-tightening clamp at the opening of the receiving groove, which clamps the second elastic element during assembly, preventing it from shifting or falling off during vibration or media impact. The constricted groove guides and positions the elastic ring assembly, allowing the first and second elastic elements to self-center upon insertion, simplifying assembly and ensuring the sealing assembly is always in its optimal working position.

[0014] Furthermore, a first limiting ring is fitted onto the fixing ring, and the first limiting ring has a limiting part extending into the receiving groove. The end of the limiting part is provided with an arc groove, which has the same curvature as the second elastic element, and is used to limit the horizontal movement of the second elastic element.

[0015] This technical solution ensures that the arcuate groove matching the limiting part and the second elastic element accurately locks the horizontal position of the annular elastic element, preventing it from sliding laterally during media impact or vibration, and ensuring that the sealing component is always in the designed position. By limiting the lateral movement of the second elastic element, the risk of uneven force on the elastic element is reduced, ensuring that the compression deformation of the first elastic ring remains consistent, further improving the contact uniformity of the sealing surface and reducing the possibility of micro-leakage.

[0016] Furthermore, a second limiting ring is provided outside the first limiting ring, and a fixed part is provided on the pushing ring. The fixed part abuts against the second limiting ring so that the second limiting ring continuously abuts against the first limiting ring to form a limiting connection.

[0017] This technical solution involves the second limiting ring abutting against the first limiting ring, with continuous pressure applied by the fixing part on the pushing ring. This provides dual constraint to the elastic element and the limiting ring structure in both the radial and axial directions, significantly improving vibration and impact resistance. The dual-ring limiting design avoids the risk of a single limiting ring loosening due to media impact or frequent operation, ensuring the limiting assembly remains stable over a long period and preventing displacement of the limiting element due to valve stem opening and closing. When the pushing ring drives the first elastic ring to contact the sealing surfaces of the valve body and the fixing ring, the continuous pressure of the second limiting ring prevents the first limiting ring from displacing outward, thus ensuring uniform load distribution on the sealing element and further reducing the possibility of micro-leakage.

[0018] Furthermore, the first elastic element and the second elastic element are springs.

[0019] This technical solution allows for precise design of the spring itself, using parameters such as material, wire diameter, and number of coils. This enables the first elastic ring and the second elastic element within the receiving groove to provide a preset and stable preload, ensuring controllable and consistent sealing load. The spring material (such as stainless steel or alloy steel) possesses excellent elastic recovery performance and fatigue resistance, maintaining long-term elastic stability even under high-frequency opening and closing or pulsating pressure environments, and is not prone to loosening or permanent deformation.

[0020] The beneficial effects of this utility model are as follows: It integrates three functions—cut-off, online sampling, and discharge—into a single valve body. All operations can be completed using only three ball valves in series and a T-shaped flow channel, eliminating the need for external sampling or discharge valves and simplifying pipeline layout and operation steps. Rotating the second ball valve allows switching between four states: "normal flow," "front-end sampling," "back-end sampling," and "discharge," making it a multi-purpose valve with more intuitive and efficient on-site operation. The integrated valve body design reduces the number of external connectors such as flanges, threaded fittings, and seals, thus reducing component procurement and inspection costs. Shortening the total pipeline length and reducing the number of interfaces not only lowers material costs but also shortens assembly and commissioning time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 yes Figure 1 Enlarged detail view of point A in the middle;

[0024] In the diagram, 1. Valve body; 11. Medium inlet; 12. Medium outlet; 13. Sampling chamber; 2. First ball valve; 21. Valve seat; 22. Valve stem; 23. Valve core; 24. Retaining ring; 241. Snap-fit ​​groove; 3. Sealing component; 31. First elastic ring; 311. Receiving groove; 312. Protrusion; 313. Second elastic element; 32. First limiting ring; 321. Limiting part; 33. Second limiting ring; 34. Pushing ring; 341. Pushing groove; 342. First elastic element; 343. Fixing part; 4. Second ball valve; 41. T-shaped flow channel; 411. Sampling channel; 412. First flow channel; 413. Second flow channel; 5. Third ball valve. Detailed Implementation

[0025] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0026] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0027] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0028] like Figure 1-2 The diagram shows an embodiment of the three-valve structure based on the online sampling and discharge function of this utility model. It includes a valve body 1, with a medium inlet 11 and a medium outlet 12 inside. A first ball valve 2, a second ball valve 4, and a third ball valve 5 are arranged between the medium inlet 11 and the medium outlet 12. The second ball valve 4 has a T-shaped flow channel 41, which includes a sampling channel 411. The sampling channel 411 is connected to a sampling chamber 13 when front-end or rear-end sampling is required. When discharge is required, the T-shaped flow channel 41 is connected to the first ball valve 2 and the third ball valve 5 on both sides.

[0029] This technical solution integrates three functions—shutdown, online sampling, and discharge—into a single valve body 1. All operations can be completed using only three ball valves in series and a T-shaped flow channel 41, eliminating the need for external sampling or discharge valves and simplifying pipeline layout and operation. Rotating the second ball valve 4 allows switching between four states: "normal flow," "front-end sampling," "back-end sampling," and "discharge," making the valve multi-functional and providing more intuitive and efficient on-site operation. The integrated valve body 1 design reduces the number of external connectors such as flanges, threaded fittings, and seals, thus reducing component procurement and inspection costs. Shortening the total pipeline length and reducing the number of interfaces not only lowers material costs but also shortens assembly and commissioning time.

[0030] The T-shaped flow channel 41 also includes a first flow channel 412 and a second flow channel 413 located on both sides of the sampling channel 411. The first flow channel 412, the second flow channel 413 and the sampling channel 411 form four status stations through rotation, including conveying, front-end sampling, rear-end sampling and discharge stations.

[0031] This technical solution allows for free switching between four workstations by rotating the second ball valve 4, with each workstation having a corresponding flow channel connection state. This avoids the risk of misoperation caused by the cumbersome valve replacement or switching operations in traditional multi-valve combinations. The first flow channel 412 corresponds to the front-end sampling workstation, and the second flow channel 413 corresponds to the rear-end sampling workstation. The operator only needs to rotate to the corresponding position to accurately select the sampling point, meeting the monitoring needs of various process parameters. The flow channel layout of the four workstations is reasonable, and the fluid will not form dead corners or blind spots in the cavity during the switching process. This ensures the representativeness of the sampling and effectively avoids secondary pollution or scaling caused by long-term retention.

[0032] Both the first ball valve 2 and the third ball valve 5 include a valve seat 21, a valve stem 22, and a valve core 23 located at the bottom of the valve stem 22. The valve seat 21 has a fixing ring 24 at its rear end, and a snap-fit ​​groove 241 on the rear side of the fixing ring 24. A sealing component 3 is provided in the snap-fit ​​groove 241, and a pushing ring 34 is provided behind the sealing component 3. The pushing ring 34 has a pushing groove 341, and a first elastic element 342 is provided in the pushing groove 341. The valve seat 21 continuously abuts against the valve core 23 under the pushing of the first elastic element 342 to form a sealed connection.

[0033] This technical solution, by setting a push ring 34 and a first elastic element 342 at the rear end of the valve seat 21, ensures that the valve seat 21 and valve core 23 are always in close contact. Even after long-term repeated opening and closing or media erosion and wear, the elastic element can automatically compensate for the gap, ensuring long-term stable sealing performance. The composite structure of the sealing component 3 and the push ring 34 in the snap-fit ​​groove 241 provides multiple leak preventions. Even in high-pressure, high-temperature, or corrosive media environments, the continuous action of the elastic element can maintain a reliable valve stem 22-valve seat 21 sealing connection, reducing the risk of media leakage.

[0034] The sealing component 3 includes a first elastic ring 31, on which a transversely arranged receiving groove 311 is provided. A second elastic element 313 is provided in the receiving groove 311. The second elastic element 313 is arranged in a ring and is sleeved in the receiving groove 311, so that the upper side of the first elastic ring 31 deforms and abuts against the valve body 1 to form a sealing connection, and the lower side deforms and abuts against the fixing ring 24 to form a sealing connection.

[0035] Through this technical solution, the first elastic ring 31 deforms on its upper side toward the valve body 1 and on its lower side toward the fixed ring 24 under the compression of the second elastic element 313, forming a double sealing surface, effectively preventing the mutual penetration of media on both sides of the valve body 1 and improving sealing reliability. The annular second elastic element 313 forms a ring-shaped spring structure around the receiving groove 311, enabling the sealing component 3 to withstand higher working pressure. At the same time, due to the limitation of the groove structure, the leakage path is more tortuous, significantly reducing the risk of media leakage.

[0036] The upper and lower sides of the receiving groove 311 are provided with protrusions 312, which are arranged in an arc shape so that the opening of the receiving groove 311 is in a contracted state.

[0037] Through this technical solution, the arc-shaped protrusion 312 forms a pre-tightening clamp at the opening of the receiving groove 311, which can clamp the second elastic element 313 during assembly, preventing it from shifting or falling off during vibration or media impact. The contracted groove provides guidance and positioning for the elastic ring assembly, allowing the first elastic ring 31 and the second elastic element 313 to self-center upon insertion, simplifying the assembly operation and ensuring that the sealing assembly is always in the optimal working position.

[0038] A first limiting ring 32 is fitted on the fixed ring 24. The first limiting ring 32 has a limiting part 321 extending into the receiving groove 311. The end of the limiting part 321 is set in an arc groove with the same curvature as the second elastic member 313, which is used to limit the horizontal movement of the second elastic member 313.

[0039] Through this technical solution, the arcuate groove matching the limiting part 321 and the second elastic element 313 accurately locks the horizontal position of the annular elastic element, preventing it from sliding laterally during media impact or vibration, and ensuring that the sealing component 3 is always in the designed position. By limiting the lateral movement of the second elastic element 313, the risk of uneven force on the elastic element is reduced, ensuring that the compression deformation of the first elastic ring 31 remains consistent, further improving the contact uniformity of the sealing surface and reducing the possibility of micro-leakage.

[0040] A second limiting ring 33 is provided outside the first limiting ring 32, and a fixed part 343 is provided on the pushing ring 34. The fixed part 343 abuts against the second limiting ring 33 so that the second limiting ring 33 continuously abuts against the first limiting ring 32 to form a limiting connection.

[0041] Through this technical solution, the second limiting ring 33 abuts against the first limiting ring 32, and is continuously pressurized by the fixing part 343 on the pushing ring 34, so that the elastic element and the limiting ring structure are doubly constrained in both the radial and axial directions, greatly improving the vibration and impact resistance. The double-ring limiting design avoids the risk of a single limiting ring loosening due to media impact or frequent operation, keeping the limiting assembly stable for a long time and preventing displacement of the limiting element due to the opening and closing of the valve stem 22. When the pushing ring 34 drives the first elastic ring 31 to contact the sealing surface of the valve body 1 and the fixing ring 24, the continuous pressure of the second limiting ring 33 can prevent the first limiting ring 32 from displacing outward, thereby ensuring uniform load distribution of the sealing element and further reducing the possibility of micro-leakage.

[0042] The first elastic element 342 and the second elastic element 313 are springs.

[0043] This technical solution allows the spring itself to be precisely designed using parameters such as material, wire diameter, and number of coils. This enables the first elastic ring 31 and the second elastic element 313 within the receiving groove 311 to provide a preset and stable preload, ensuring a controllable and consistent sealing load. The spring material (such as stainless steel or alloy steel) possesses excellent elastic recovery performance and fatigue resistance, maintaining long-term elastic stability even under high-frequency opening and closing or pulsating pressure environments, and is not prone to loosening or permanent deformation.

[0044] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0045] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A three-valve structure based on online sampling and emission function, characterized in that: The device includes a valve body, which has a medium inlet and a medium outlet. A first ball valve, a second ball valve, and a third ball valve are arranged between the medium inlet and the medium outlet. The second ball valve has a T-shaped flow channel, which includes a sampling channel. The sampling channel is connected to a sampling chamber when front-end sampling or rear-end sampling is required. When discharge is required, the T-shaped flow channel is connected to the first ball valve and the third ball valve on both sides.

2. The three-valve structure as described in claim 1, characterized in that: The T-shaped flow channel also includes a first flow channel and a second flow channel located on both sides of the sampling channel. The first flow channel, the second flow channel, and the sampling channel form four status stations through rotation, including conveying, front-end sampling, back-end sampling, and discharge stations.

3. The three-valve structure as described in claim 1, characterized in that: Both the first ball valve and the third ball valve include a valve seat, a valve stem, and a valve core located at the bottom of the valve stem. The valve seat has a retaining ring at its rear end, a snap-fit ​​groove at its rear side, a sealing component in the snap-fit ​​groove, a pushing ring at the rear of the sealing component, a pushing groove on the pushing ring, and a first elastic element in the pushing groove. The valve seat continuously abuts against the valve core under the pushing of the first elastic element to form a sealed connection.

4. The three-valve structure as described in claim 3, characterized in that: The sealing component includes a first elastic ring with a transversely arranged receiving groove. A second elastic element is provided in the receiving groove. The second elastic element is annular and sleeved in the receiving groove, so that the upper side of the first elastic ring deforms and abuts against the valve body to form a sealing connection, and the lower side deforms and abuts against the fixed ring to form a sealing connection.

5. The three-valve structure as described in claim 4, characterized in that: The upper and lower sides of the receiving groove are provided with protrusions, which are arranged in an arc shape so that the opening of the receiving groove is in a constricted state.

6. The three-valve structure as described in claim 3, characterized in that: A first limiting ring is fitted onto the fixed ring. The first limiting ring has a limiting part extending into the receiving groove. The end of the limiting part is set in an arc groove with the same curvature as the second elastic element, which is used to limit the horizontal movement of the second elastic element.

7. The three-valve structure as described in claim 6, characterized in that: A second limiting ring is provided outside the first limiting ring, and a fixed part is provided on the pushing ring. The fixed part abuts against the second limiting ring so that the second limiting ring continuously abuts against the first limiting ring to form a limiting connection.

8. The three-valve structure as described in claim 7, characterized in that: The first and second elastic elements are springs.

Images