A fluorine-lined sampling valve

Abstract

The utility model relates to the technical field of sampling valves, and discloses a fluorine-lined sampling valve, including an upper valve cover clamped on the upper part of a valve body, a valve core cover and a valve stem, a limit table, a filler, a sampling pressure plate, and a nut are arranged on the upper part of the upper valve cover. The utility model has a reasonable structure, and a lining layer is provided with a dovetail groove inside the valve body to ensure that the lining layer will not fall off under negative pressure conditions, the valve core and the valve stem are integrally sealed through a bellows, and friction debris will not be generated to pollute the medium, a limit table is provided to avoid excessive opening of the valve to damage the bellows, and the upper end of the valve stem is secondary sealed by the filler, even if the bellows is damaged, the medium will not immediately spray out and cause external leakage, the connection between the sampling joint and the sampling bottle adopts an inner convex design, and the adhered liquid falls into the bottle quickly here after the sampling is completed, avoiding the dripping of the medium after the sampling bottle is removed, and the L-shaped exhaust hole is provided inside the sampling joint, and the medium enters the sampling bottle during the sampling process, and the internal air is discharged through the L-shaped exhaust hole.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling valves, in particular to a fluorine-lined sampling valve. Background Art

[0002] The fluorine-lined sampling valve is a fluorine-lined sampling valve that uses a metal valve body lined with PFA fluorine material. The valve stem is lifted by pressing the handle to discharge the material in the pipeline into the sampling bottle. Compared with the traditional sampling method, it has the advantages of fast and controllable sampling flow rate, no residual material affecting the sampling results, no debris contamination caused by valve stem friction, and safe and reliable sealing. It has better results in sampling electronic-grade liquid materials. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies of the prior art, the utility model provides a fluorine-lined sampling valve, which solves the problems of slow flow control speed of the prior sampling valve, debris pollution caused by valve stem friction, and medium overflow due to pressure after sampling.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a fluorine-lined sampling valve, comprising a valve body, an upper valve cover is clamped on the upper part of the valve body, a valve core cover is provided on the upper part of the upper valve cover, a valve stem is slidably connected to the inside of the valve core cover, a limit platform is provided at the lower part of the valve stem, a filler is wrapped at the lower end of the valve stem, a sampling pressure plate is sleeved on the upper part of the valve stem, a nut is threadedly connected to the upper end of the valve stem, a spring is provided inside the valve core cover, a spring fixing seat is threaded through the upper surface of the upper valve cover, a valve core is threadedly connected to the lower part of the valve stem, a bellows is provided in the middle of the valve core, a lining is provided inside the valve body, a lower valve cover is clamped on the lower part of the valve body, and a sampling connector is threadedly connected to the lower part of the lower valve cover.

[0007] Optionally, a pressure rod bracket is provided on one side of the upper valve cover, one end of the pressure rod bracket is rotatably connected to a pulling pressure rod through a pressure rod shaft, and an extended handle is inserted into the interior of the pulling pressure rod.

[0008] Optionally, the upper valve cover and the lower valve cover are connected by long bolts, the number of the long bolts is four, and a sampling hole is opened in the middle of the lower valve cover.

[0009] Optionally, a sealing ring is provided inside the lower valve cover, and the sealing ring is located in the middle of the lower valve cover and the sampling connector, and an L-shaped exhaust hole is opened inside the sampling connector.

[0010] Optionally, the lining is in the form of a dovetail groove, flanges are provided at both ends of the valve body, and the lining is located inside the flanges at both ends of the valve body.

[0011] Optionally, a sampling bottle is passed through the internal thread of the sampling connector, the connection between the sampling head and the sampling bottle is inwardly convex, and the filler is located in the middle of the upper valve cover and the spring fixing seat.

[0012] Optionally, a fixing bolt is inserted into the upper portion of the extended handle, and positioning lock holes are provided on the upper portions of the pulling pressure rod and the pressure rod bracket.

[0013] In summary, the technical effects and advantages of the utility model are:

[0014] 1. The utility model has a reasonable structure. By arranging a lining with a dovetail groove inside the valve body, it has excellent corrosion resistance. At the same time, it can ensure that the lining will not fall off under negative pressure conditions. The valve core and the valve stem are integrally sealed by the bellows. The bellows flexibly creeps during opening and closing, and friction debris will not be generated to contaminate the medium, ensuring the cleanliness of the sampling. A limit platform is arranged at the connection between the valve stem and the upper valve cover to prevent the bellows from being damaged by excessive opening of the valve. The upper end of the valve stem is secondary sealed by the packing. Even if the bellows is damaged, the medium will not spray out immediately to cause leakage, and it is safer to use.

[0015] 2. In the utility model, a positioning lock hole is provided at the pressure rod by pulling the pressure rod, and the lock can be used when no operation is needed, so the valve cannot be opened to prevent accidental discharge of the medium due to misoperation, and the use safety is higher. The valve core is pushed down by the spring to ensure sufficient thrust, and the spring compression amount can be quickly adjusted. The conical sealing surface of the valve core fits tightly with the cover of the sampling hole of the lower valve cover, and the sealing area is large to ensure that the valve seal is safe and reliable. The connection between the sampling joint and the sampling bottle adopts an inner convex design. After the sampling is completed, the adhered liquid quickly falls into the bottle here to avoid contamination caused by a large amount of medium dripping after the sampling bottle is removed. The L-shaped exhaust hole is provided inside the sampling joint, and the medium can enter the sampling bottle during the sampling process, and the internal air is discharged through the L-shaped exhaust hole to avoid accidents caused by excessive pressure in the sampling bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the planar structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the valve body of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the upper valve cover and the lower valve cover of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the sampling joint of the utility model;

[0021] Figure 6 This is a schematic diagram of the valve core structure of the utility model.

[0022] In the figure: 1. valve body; 2. upper valve cover; 3. valve core cover; 4. valve stem; 5. limit table; 6. packing; 7. sampling pressure plate; 8. nut; 9. spring; 10. spring fixing seat; 11. valve core; 12. bellows; 13. lining; 14. lower valve cover; 15. sampling connector; 16. pull pressure rod; 17. extension handle; 18. long bolt; 19. sealing ring; 20. sampling bottle. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example: Reference Figure 1-Figure 6 A fluorine-lined sampling valve is shown, comprising a valve body 1, an upper valve cover 2 is clamped on the upper part of the valve body 1, a valve core cover 3 is provided on the upper part of the upper valve cover 2, a valve stem 4 is slidably connected inside the valve core cover 3, a limit platform 5 is provided at the lower part of the valve stem 4, a packing 6 is wrapped at the lower end of the valve stem 4, a sampling pressure plate 7 is sleeved on the upper part of the valve stem 4, a nut 8 is threadedly connected to the upper end of the valve stem 4, a spring 9 is provided inside the valve core cover 3, a spring fixing seat 10 is threadedly penetrated through the upper surface of the upper valve cover 2, a valve core 11 is threadedly connected to the lower part of the valve stem 4, a bellows 12 is provided in the middle of the valve core 11, a lining 13 is provided inside the valve body 1, a lower valve cover 14 is clamped on the lower part of the valve body 1, and a sampling connector 15 is threadedly connected to the lower part of the lower valve cover 14.

[0025] As a preferred implementation in this embodiment, Figures 1 to 6As shown, an upper valve cover 2 is clamped on the upper part of the valve body 1, a valve core cover 3 is provided on the upper part of the upper valve cover 2, a valve stem 4 is slidably connected inside the valve core cover 3, a limit platform 5 is provided at the lower part of the valve stem 4, a packing 6 is wrapped at the lower end of the valve stem 4, a sampling pressure plate 7 is sleeved on the upper part of the valve stem 4, a nut 8 is threadedly connected to the upper end of the valve stem 4, a spring 9 is provided inside the valve core cover 3, a spring fixing seat 10 is threadedly penetrated through the upper surface of the upper valve cover 2, a valve core 11 is threadedly connected to the lower part of the valve stem 4, a bellows 12 is provided in the middle of the valve core 11, a lining 13 is provided inside the valve body 1, and the lining 13 is in the form of a dovetail groove, flanges are provided at both ends of the valve body 1, and the lining 13 is located at the valve body 1 The inside of the flanges at both ends of this fluorine-lined sampling valve is made of stainless steel lining PFA material. A lining 13 with a dovetail groove is provided inside the valve body 1, which has excellent corrosion resistance and can ensure that the lining will not fall off under negative pressure conditions. The valve core 11 and the valve stem 4 are integrally sealed through the bellows 12. The bellows 12 creeps flexibly during opening and closing, and no friction debris is generated to contaminate the medium, thereby ensuring the cleanliness of the sampling. A limit platform 5 is provided at the connection between the valve stem 4 and the upper valve cover 2 to prevent the bellows 12 from being damaged by excessive opening of the valve. The upper end of the valve stem 4 is sealed for the second time through the packing 6. Even if the bellows 12 is damaged, the medium will not spray out immediately to cause leakage, making it safer to use.

[0026] like Figure 2 , Figure 3 and Figure 5 , Figure 6As shown, in this embodiment, the upper part of the valve body 1 is clamped with an upper valve cover 2, the upper part of the upper valve cover 2 is provided with a valve core cover 3, the interior of the valve core cover 3 is slidably connected with a valve stem 4, the lower part of the valve stem 4 is provided with a limit platform 5, the lower end of the valve stem 4 is wrapped with a packing 6, the upper part of the valve stem 4 is sleeved with a sampling pressure plate 7, the upper end of the valve stem 4 is threadedly connected with a nut 8, a spring 9 is provided inside the valve core cover 3, the upper surface of the upper valve cover 2 is threadedly penetrated with a spring fixing seat 10, one side of the upper valve cover 2 is provided with a pressure rod bracket, one end of the pressure rod bracket is passed through The pressure rod shaft is rotatably connected with a pull pressure rod 16, an extended handle 17 is inserted inside the pull pressure rod 16, a fixing bolt is inserted on the upper part of the extended handle 17, and a positioning lock hole is provided on the upper part of the pull pressure rod 16 and the pressure rod bracket. The upper valve cover 2 and the lower valve cover 14 are connected by long bolts 18, and the number of long bolts 18 is four. A sampling hole is provided in the middle of the lower valve cover 14, and a sealing ring 19 is provided inside the lower valve cover 14. The sealing ring 19 is located in the middle of the lower valve cover 14 and the sampling joint 15. The sampling joint 1 An L-shaped exhaust hole is provided inside the valve 5, and the internal thread of the sampling joint 15 penetrates the sampling bottle 20. The connection between the sampling head 15 and the sampling bottle 20 is in an inward convex shape. The packing 6 is located in the middle of the upper valve cover 2 and the spring fixing seat 10. A positioning lock hole is provided at the pull rod 16. When no operation is required, it can be locked, and the valve cannot be opened to prevent accidental discharge of the medium due to misoperation. The use safety is higher. The valve core 11 is pushed down by the spring 9 to ensure sufficient thrust. The spring compression amount can be quickly adjusted. The conical sealing surface of the valve core 11 fits tightly with the sampling hole cover of the lower valve cover 14, and the sealing area is large, ensuring that the valve seal is safe and reliable. The connection between the sampling joint 15 and the sampling bottle 20 adopts an inward convex design. After the sampling is completed, the adhered liquid quickly falls into the bottle here to avoid contamination caused by a large amount of medium dripping after the sampling bottle is removed. The L-shaped exhaust hole provided inside the sampling joint 15 allows the medium to enter the sampling bottle 20 during the sampling process, and the internal air is discharged through the L-shaped exhaust hole to avoid accidents caused by excessive pressure in the sampling bottle.

[0027] How this utility works:

[0028] During use, the extended handle 17 can be pulled to drive the pressure rod 16 so that the valve stem 4 drives the valve core 11 to open. The valve core 11 is pushed down by the spring 9 to ensure sufficient thrust. The spring compression amount can be quickly adjusted. When no operation is needed, the pressure rod 16 can be locked, and the valve cannot be opened. The medium enters the sampling bottle 20 through the lower valve cover 14 and the sampling connector 15. The L-shaped exhaust hole provided inside the sampling connector 15 allows the medium to enter the sampling bottle 20 during the sampling process, and the internal air is discharged through the L-shaped exhaust hole to avoid accidents caused by excessive pressure in the sampling bottle. The valve core 11 and the valve stem 4 are integrally sealed by the bellows 12. The bellows 12 creeps flexibly during the opening and closing process, and no friction debris is generated to contaminate the medium. The sampling bottle 20 can be unscrewed after sampling.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A fluorine-lined sampling valve, comprising a valve body (1), characterized in that: The upper part of the valve body (1) is clamped with an upper valve cover (2), the upper part of the upper valve cover (2) is provided with a valve core cover (3), the interior of the valve core cover (3) is slidably connected with a valve stem (4), the lower part of the valve stem (4) is provided with a limit platform (5), the lower end of the valve stem (4) is wrapped with a filler (6), the upper part of the valve stem (4) is sleeved with a sampling pressure plate (7), the upper end of the valve stem (4) is threadedly connected with a nut (8), the interior of the valve core cover (3) is provided with a spring (9), the upper surface of the upper valve cover (2) is threadedly penetrated with a spring fixing seat (10), the lower part of the valve stem (4) is threadedly connected with a valve core (11), the middle part of the valve core (11) is provided with a bellows (12), the interior of the valve body (1) is provided with a lining layer (13), the lower part of the valve body (1) is clamped with a lower valve cover (14), and the lower part of the lower valve cover (14) is threadedly connected with a sampling joint (15).

2. A fluorine-lined sampling valve according to claim 1, characterized in that: A pressure rod bracket is provided on one side of the upper valve cover (2), one end of the pressure rod bracket is rotatably connected to a pulling pressure rod (16) via a pressure rod shaft, and an extended handle (17) is inserted into the interior of the pulling pressure rod (16).

3. A fluorine-lined sampling valve according to claim 1, characterized in that: The upper valve cover (2) and the lower valve cover (14) are connected by long bolts (18), the number of the long bolts (18) is four, and a sampling hole is provided in the middle of the lower valve cover (14).

4. A fluorine-lined sampling valve according to claim 1, characterized in that: A sealing ring (19) is provided inside the lower valve cover (14), and the sealing ring (19) is located in the middle of the lower valve cover (14) and the sampling joint (15). An L-shaped exhaust hole is provided inside the sampling joint (15).

5. A fluorine-lined sampling valve according to claim 1, characterized in that: The lining (13) is in the form of a dovetail groove, flanges are provided at both ends of the valve body (1), and the lining (13) is located inside the flanges at both ends of the valve body (1).

6. A fluorine-lined sampling valve according to claim 1, characterized in that: The internal thread of the sampling connector (15) penetrates a sampling bottle (20), and the filler (6) is located in the middle of the upper valve cover (2) and the spring fixing seat (10).

7. A fluorine-lined sampling valve according to claim 2, characterized in that: A fixing bolt is inserted into the upper portion of the extended handle (17), and positioning lock holes are provided on the upper portions of the pulling pressure rod (16) and the pressure rod bracket.

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