Sealed fluorine-lined sampling valve
By using a fluoropolymer lining on the sampling valve and a removable, sealed sampling bottle design, the problems of insufficient corrosion resistance and sealing performance of existing sampling valves are solved, enabling efficient and low-cost sample collection and storage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GONGHENG VALVE (SHANGHAI) CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-01
AI Technical Summary
Most existing sampling valves are made of metal, which has poor corrosion resistance and poor sealing performance, resulting in easy volatilization of samples and environmental pollution. At the same time, they are costly and the sampling efficiency and quality are difficult to guarantee.
The sealed fluoropolymer-lined sampling valve, with its detachable sealed sampling bottle and double-sealed design, ensures that samples are transported and stored in a closed environment. The flow rate and sampling volume are controlled by a six-pin handwheel.
The sampling valve has improved corrosion resistance and sealing performance, ensuring sample integrity and quality, reducing sampling costs, and enabling efficient sample transfer and storage.
Smart Images
Figure CN224188137U_ABST
Abstract
Description
A sealed fluoropolymer-lined sampling valve Technical Field
[0001] This application relates to the field of sampling valve technology, and in particular to a closed fluoropolymer-lined sampling valve. Background Technology
[0002] A sampling valve is a valve used to obtain samples of the medium in pipelines or equipment, and is used in situations where frequent chemical analysis of the medium samples is required.
[0003] Existing sampling valves are mostly made of metal, which is not corrosion-resistant and has poor sealing performance. Samples are easily exposed to air, which can lead to volatilization and environmental pollution. At the same time, the cost of using special materials is too high, resulting in high sampling costs and unreliable sampling efficiency and quality.
[0004] Therefore, there is an urgent need in this field for a new type of sampling valve to solve the above problems. Summary of the Invention
[0005] To improve the overall sealing and corrosion resistance of the sampling valve, ensure the sampling efficiency and quality of the sampling medium, and reduce sampling costs.
[0006] The sealed fluoropolymer-lined sampling valve provided in this application adopts the following technical solution:
[0007] A sealed fluoropolymer-lined sampling valve includes a valve body with a sample inlet and a sample outlet. A sampling port communicating with the internal cavity of the valve body is located at the bottom of the valve body. A valve seat is located inside the sampling port. An upper valve cover is located at the top of the valve body, and a valve stem is screwed onto the upper valve cover. One end of the valve stem extends into the valve body and moves towards or away from the sampling port via a spiral motion to control the opening and closing of the sampling port. The other end of the valve stem extends out of the upper valve cover and is connected to a six-lobed handwheel to drive the rotation of the valve stem. Fluorine lining is provided on the inner walls of the valve body, the upper valve cover, and the valve seat, as well as on the outer wall of the valve stem. A sealed sampling bottle can be detachably mounted at the bottom of the valve body. A sealed rubber seal is provided at the mouth of the sealed sampling bottle. A sampling needle is connected to the valve seat and passes through the sealed rubber seal into the sealed sampling bottle. An exhaust port is provided on the valve seat, and an exhaust needle communicating with the sealed sampling bottle is mounted on the sealed rubber seal.
[0008] Preferably, the sealed sampling bottle has a threaded portion on the outer wall at the bottle mouth, and the sealed sampling bottle is screwed to the bottom of the valve body through the threaded portion.
[0009] Furthermore, the bottom of the valve body is provided with a sampling bottle cover, the sealed sampling bottle is inserted through the bottom of the sampling bottle cover and screwed onto the inner wall of the sampling bottle cover through the threaded part, and a bottle support is provided at the bottom of the sampling bottle cover to support the sealed sampling bottle.
[0010] Furthermore, the sealed sampling bottle has a graduated strip on its outer wall, and the sampling bottle cover has an observation window on its outer wall.
[0011] Furthermore, the bottle cap is detachably screwed to the mouth of the sealed sampling bottle via the threaded portion.
[0012] Preferably, the valve seat has a purge port that communicates with the sampling needle. The purge port is connected to an air inlet pipe, and the other end of the air inlet pipe is connected to an external inflation device. A one-way valve is provided at the end of the air inlet pipe that communicates with the purge port, and a purge valve is provided on the outer wall of the end of the air inlet pipe that is away from the purge port.
[0013] Preferably, the fluoropolymer lining includes, but is not limited to, structural layers made of PFA, FEP, or PTFE.
[0014] Compared with the prior art, the sealed fluoropolymer-lined sampling valve of this utility model has the following beneficial technical effects:
[0015] 1. The sealed fluoropolymer-lined sampling valve of this utility model has a structural layer made of materials including but not limited to PFA, FEP or PTFE on the parts that can contact the sample inside the sampling valve, which can withstand all corrosive media and greatly enhances the corrosion resistance of the sampling valve.
[0016] 2. The sealed fluoropolymer-lined sampling valve of this utility model features a detachable sealed sampling bottle. When the sample enters the sealed sampling bottle and is pulled out, the sealed rubber seal at the bottle opening automatically springs back, sealing the sample inside the bottle. After the bottle cap is put back on, a double seal is achieved. The flow channel is designed to be free of stagnation and flow resistance, without affecting the flow rate. The fluoropolymer-lined valve stem is moved up and down by rotating a six-lobed handwheel, which can precisely control the flow rate and sampling volume, allowing the sample to enter the sealed sampling bottle. Attached Figure Description
[0017] Figure 1 is a side view of a sealed fluoropolymer-lined sampling valve provided in an embodiment of the present invention;
[0018] Figure 2 is a schematic diagram of the cross-sectional structure along the AA direction in Figure 1;
[0019] Figure 3 is a front view of a sealed fluoropolymer-lined sampling valve provided in an embodiment of this utility model;
[0020] Figure 4 is a schematic diagram of the cross-sectional structure along the BB direction in Figure 3.
[0021] Reference numerals: 1. Valve body; 11. Sample inlet; 12. Sample outlet; 13. Sampling port; 2. Valve seat; 21. Exhaust port; 22. Purge port; 3. Upper valve cover; 4. Valve stem; 5. Six-lobed handwheel; 6. Fluorine lining; 7. Sealed sampling bottle; 71. Threaded part; 8. Sealed rubber seal; 9. Sampling needle; 10. Exhaust needle; 14. Sampling bottle cover; 15. Bottle holder; 16. Bottle cap; 17. Scale strip; 18. Observation window; 19. Air inlet pipe; 20. One-way valve; 23. Purge valve. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0023] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains. The use of terms such as "a" or "an" in this patent application specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one.
[0024] The present application will be further described in detail below with reference to Figures 1-4.
[0025] This application discloses a sealed fluoropolymer-lined sampling valve.
[0026] Referring to Figures 1-4, a sealed fluoropolymer-lined sampling valve includes a valve body 1. A sample inlet 11 and a sample outlet 12 are integrally formed on the side wall of the valve body 1. A sampling port 13, communicating with the inner cavity of the valve body 1, is integrally formed at the bottom end of the valve body 1. A valve seat 2 is installed inside the sampling port 13. An upper valve cover 3 is installed at the top end of the valve body 1. A valve stem 4 is screwed onto the upper valve cover 3. One end of the valve stem 4 extends into the valve body 1. The upper valve cover 3 limits the helical motion of the valve stem 4, converting it into linear motion along its axis, thus allowing it to approach or move away from the valve body 1. The valve stem 4 extends from the sampling port 13 to control the opening and closing of the sampling port 13. The other end of the valve stem 4 extends out of the upper valve cover 3 and is connected to a six-lobed handwheel 5 to drive the rotation of the valve stem 4. In feasible embodiments, the valve seat 2 and the upper valve cover 3 can be integrally forged and connected to the valve body 1. The valve seat 2 and the upper valve cover 3 are directly machined on the partition inside the valve body 1 without independent connecting parts, achieving a seamless structure. They can also be threaded, flanged, or welded. In this embodiment, the valve seat 2 and the upper valve cover 3 are preferably integrally forged and connected.
[0027] Furthermore, the six-lobed handwheel 5 is equipped with two bearings on the top and bottom, which reduces the operating torque.
[0028] Referring to Figures 2 and 4, a fluoropolymer lining 6 is machined on the inner walls of the valve body 1, the upper valve cover 3, and the valve seat 2, as well as on the outer wall of the valve stem 4. The fluoropolymer lining 6 includes, but is not limited to, a structural layer made of PFA, FEP, or PTFE. The fluoropolymer lining 6 can be processed by molding, winding (layer sintering), or spraying, all of which are existing technologies and will not be described in detail. This process can make the interior of the sampling valve body 1 as resistant as possible to all corrosive media and improve its corrosion resistance.
[0029] Referring to Figures 1-4, a sealed sampling bottle 7 can also be detachably installed at the bottom of the valve body 1. The sealed sampling bottle 7 can be either transparent or light-proof. This sealed sampling valve is widely used in the pharmaceutical, chemical, and food industries.
[0030] A sealed rubber seal 8 is glued or clipped to the mouth of the sealed sampling bottle 7. A sampling needle 9 is installed on the valve seat 2 and is connected to it. The sampling needle 9 is inserted into the sealed sampling bottle 7 by passing through the sealed rubber seal 8, thus allowing the sample to enter the sealed sampling bottle 7 through the sampling needle 9. After the sealed sampling bottle 7 is removed from the sampling needle 9, the insertion opening is sealed by the elastic force of the sealed rubber seal 8, thus sealing the sample inside the sealed sampling bottle 7. An exhaust port 21 is integrally formed on the valve seat 2. An exhaust needle 10 is inserted through the sealed rubber seal 8, connecting the exhaust port 21 and the sealed sampling bottle 7. The sample is pressurized when it enters the sealed sampling bottle 7. The exhaust needle 10 can release the pressure in time. The exhaust gas can be connected to an exhaust gas recovery center or a matching activated carbon adsorption tank. The addition of the exhaust needle 10 realizes pressureless sampling.
[0031] Referring to Figures 2 and 4, a threaded portion 71 is integrally formed on the outer wall of the mouth of the sealed sampling bottle 7, and the sealed sampling bottle 7 is screwed to the bottom of the valve body 1 through the threaded portion 71.
[0032] Specifically, a sampling bottle cover 14 is threadedly connected to the bottom of the valve body 1. The bottom of the sampling bottle cover 14 is open, and the sealed sampling bottle 7 is inserted from the bottom of the sampling bottle cover 14 and screwed onto the inner wall of the sampling bottle cover 14 through the threaded part 71. A bottle support 15 is rotatably installed on the outer wall of the sampling bottle cover 14 through a pivot. The side of the bottle support 15 away from the hinge side is sealed and can be rotated to the sampling bottle cover 14 to support the sealed sampling bottle 7. A bottle cap 16 can also be detachably screwed to the mouth of the sealed sampling bottle 7 through the threaded part 71, so that after sampling, the sealed sampling bottle 7 can be double-sealed by the bottle cap 16 and the sealed rubber seal 8.
[0033] Referring to Figure 3, a scale bar 17 is machined on the outer wall of the sealed sampling bottle 7, and an observation window 18 is opened on the outer wall of the sampling bottle cover 14, so that the sampling personnel can observe the sampling amount of the sample flowing in, thus realizing the user's sampling amount requirements.
[0034] Referring to Figure 4, a purge port 22 connected to the sampling needle 9 is provided on the valve seat 2. The purge port 22 is connected to an air inlet pipe 19, and the other end of the air inlet pipe 19 is connected to an external inflation device. The inflation device can be a common inflation pump, which can pump inert gases such as nitrogen. A one-way valve 20 is installed at the end of the air inlet pipe 19 connected to the purge port 22. A purge valve 23 is installed on the outer wall of the end of the air inlet pipe 19 away from the purge port 22. After sampling, the sealed fluorine-lined sampling valve is closed by the six-pin handwheel 5. Then, the residual sample in the sampling needle 9 is blown into the sealed sampling bottle 7 through the purge valve 23. After the purge is completed, the purge valve 23 is closed. Then, the sealed sampling bottle 7 is pulled out. At the same time as it is pulled out, the sealed rubber seal 8 of the sealed sampling bottle 7 automatically rebounds to seal the sample inside the sealed sampling bottle 7, so as to achieve the function of sealed sampling. The sample is then taken to the laboratory for testing.
[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A sealed fluoropolymer-lined sampling valve, comprising a valve body (1), a sample inlet (11) and a sample outlet (12) on the valve body (1), a sampling port (13) communicating with the inner cavity of the valve body (1) at the bottom end of the valve body (1), a valve seat (2) inside the sampling port (13), an upper valve cover (3) at the top end of the valve body (1), a valve rod (4) screwed onto the upper valve cover (3), one end of the valve rod (4) extending into the valve body (1) and moving toward or away from the sampling port (13) by a spiral motion to control the opening and closing of the sampling port (13), the other end of the valve rod (4) extending out of the upper valve cover (3) and connected to a six-lobed handwheel (5) to drive the rotation of the valve rod (4), characterized in that, The valve body (1), the upper valve cover (3), the valve seat (2) are all provided with a fluoropolymer lining (6) on their inner walls and the valve stem (4) on their outer walls. The bottom of the valve body (1) can also be detachably provided with a sealed sampling bottle (7). The mouth of the sealed sampling bottle (7) is provided with a sealed rubber seal (8). A sampling needle (9) is connected to the valve seat (2). The sampling needle (9) passes through the sealed rubber seal (8) and extends into the sealed sampling bottle (7). The valve seat (2) is provided with an exhaust port (21). An exhaust needle (10) is provided on the sealed rubber seal (8) to connect the exhaust port (21) and the sealed sampling bottle (7).
2. The sealed fluoropolymer-lined sampling valve according to claim 1, characterized in that: The sealed sampling bottle (7) has a threaded part (71) on the outer wall at the bottle mouth, and the sealed sampling bottle (7) is screwed to the bottom of the valve body (1) through the threaded part (71).
3. The sealed fluoropolymer-lined sampling valve according to claim 2, characterized in that: The bottom of the valve body (1) is provided with a sampling bottle cover (14). The sealed sampling bottle (7) is inserted from the bottom of the sampling bottle cover (14) and screwed onto the inner wall of the sampling bottle cover (14) through the threaded part (71). A bottle support (15) is provided at the bottom of the sampling bottle cover (14) to support the sealed sampling bottle (7).
4. A sealed fluoropolymer-lined sampling valve according to claim 3, characterized in that: The sealed sampling bottle (7) has a graduated strip (17) on its outer wall, and the sampling bottle cover (14) has an observation window (18) on its outer wall.
5. A sealed fluoropolymer-lined sampling valve according to claim 2, characterized in that: The bottle cap (16) is detachably screwed to the mouth of the sealed sampling bottle (7) via the threaded part (71).
6. A sealed fluoropolymer-lined sampling valve according to claim 1, characterized in that: The valve seat (2) is provided with a purge port (22) that communicates with the sampling needle (9). The purge port (22) is connected to an air inlet pipe (19). The other end of the air inlet pipe (19) is connected to an external air filling device. A one-way valve (20) is provided at the end of the air inlet pipe (19) that communicates with the purge port (22). A purge valve (23) is provided on the outer wall of the end of the air inlet pipe (19) that is away from the purge port (22).
7. A sealed fluoropolymer-lined sampling valve according to claim 1, characterized in that: The fluoropolymer lining (6) includes, but is not limited to, PFA, FEP or PTFE structural layers.