Self-resetting sampling valve

Abstract

The utility model relates to the technical field of sampling valves, and discloses a self-resetting sampling valve, including: a valve body, an upper valve cover is arranged on the top of the valve body, a spring reset base is fixedly connected to the top of the upper valve cover by an inner hexagonal bolt, a spring adjustment upper seat is arranged on the top of the spring reset base, the top of the spring adjustment upper seat is threadedly connected to an opening height adjustment hand wheel, and the outer wall of the opening height adjustment hand wheel is threadedly connected to a locking nut and fits with the top of the spring adjustment upper seat, the inner wall of the spring reset base is movably connected to a spring base, a packing gland is installed on the top of the upper valve cover, and is fixed to the upper valve cover by two packing gland fixing bolts. The utility model uses the function of automatic valve closing with spring reset to make the sample flow from the sample inlet to the sample outlet, and real-time sampling is performed, thereby ensuring the authenticity and real-time nature of sample sampling.

Description

Technical Field

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

[0002] In the production of dye chemicals, medicine, papermaking and alumina industries, it is necessary to conduct regular and fixed-point testing and analysis of production materials to obtain various technical information to determine whether the production is normal and whether the technical indicators are reasonable, and then make timely adjustments to the production process. Other industrial productions also have this process, but the samples taken and the sampling methods used in different industrial productions are different. For example, in the production process of alumina, materials generally flow in pipes and containers. To obtain materials from pipes or containers, they must be taken through sampling valves.

[0003] When the existing sampling valve is used, there is a situation that after sampling, the valve is forgotten to be closed, so that the sample flows out and contaminates the sample. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a self-resetting sampling valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-resetting sampling valve, comprising: a valve body, an upper valve cover is arranged on the top of the valve body, the top of the upper valve cover is fixedly connected with a spring reset base by an inner hexagonal bolt, the top of the spring reset base is arranged with a spring adjustment upper seat, the top of the spring adjustment upper seat is threadedly connected with an opening height adjustment hand wheel, and the opening height of the opening height adjustment hand wheel can be adjusted up and down by setting the opening height adjustment hand wheel to control the opening height of the valve stem, when the opening height adjustment hand wheel is adjusted downward, the distance between the opening height adjustment hand wheel and the valve stem is in a reduced state, when the handle is pressed, the valve stem hits the top rod of the opening height adjustment hand wheel, the opening height of the valve is limited, and the sampling flow rate is also limited to a specific flow rate, so as to avoid the inability to obtain the minimum capacity due to excessive opening height, and it is more suitable for taking a capacity of 3-10ML, on the contrary, if the sampling flow rate is too small, the opening height adjustment hand wheel can be adjusted upward, and the valve The top of the rod hits the top rod of the opening height adjustment handwheel, the height of the valve opening is increased, and the sampling flow rate is also increased, which is more suitable for taking a capacity of 300-1000ML, and the outer wall of the opening height adjustment handwheel is threadedly connected with a locking nut, and fits with the top of the spring adjustment upper seat, the inner wall of the spring return base is movably connected with a spring base, the top of the upper valve cover is installed with a packing gland, and is fixed to the upper valve cover by two packing gland fixing bolts, a through hole is opened at the bottom of the spring base, and a valve stem is installed on the inner wall of the through hole, the top of the valve stem is fixedly connected by two threaded sleeves, the bottom of the valve stem is movably moved downward to pass through the packing gland and the upper valve cover and extend to the inside of the valve body, a cam is installed on the outer wall of the valve stem, a movable hole is opened on one side of the spring return base, a handle is fixedly connected to one side of the cam, and the cam is rotatably connected to the spring return base by a pin, which is used to pry the cam upward.

[0006] Preferably, a retaining spring is clamped on the outer side of the pin to limit the pin from detaching from the handle.

[0007] Preferably, the outer wall fixing sleeve of the valve stem is provided with a valve stem pressing gasket, which is located below the cam and is used to cooperate with the cam to press the valve stem downward.

[0008] Preferably, the inner wall bottom of the spring base and the inner wall top of the spring adjustment seat are respectively provided with an annular groove, a spring is installed in the annular groove, which is used to reset the spring base downward to drive the valve stem downward, and the outer wall of the spring adjustment seat is provided with a spring adjustment outer hexagonal locking thread groove, and the outer wall of the spring adjustment outer hexagonal locking thread groove is threadedly connected with a spring adjustment outer hexagonal fixing bolt, and the bottom is fitted with the spring reset seat for locking the spring reset seat. By adjusting the tightness of the spring by adjusting the spring adjustment seat, there is no need to disassemble the valve and shut down. The spring tightness can be easily adjusted by a wrench. For example, when the working pressure of the sampling valve is low, the spring adjustment seat can be adjusted upward, and the spring is in a relaxed state, which can reduce the force of the handle pressing, making the sampling lighter. The spring adjustment seat can also be adjusted downward. With the increase of service life and the increase of sampling frequency, the sealing surface has slight leakage, which can also be adjusted downward by adjusting the spring adjustment seat, so that the elastic force of the spring is increased, and the force applied to the valve seat is also increased, and slight leakage can also be easily solved.

[0009] Preferably, an annular groove is provided at the top between the valve bodies, a valve body gasket is installed between the upper valve cover and the annular groove, a first mounting groove is provided on the outer wall of the upper valve cover, and a valve cover O-ring is installed on the inner wall of the first mounting groove and fits with the inner wall of the valve body, a second mounting groove is provided on the outer wall of the valve stem, a valve stem O-ring is installed in the second mounting groove and fits with the inner wall of the upper valve cover. The second installation groove is provided with three rows, and three stem O-rings are installed. The stem O-ring and V-shaped packing form a double sealing structure. The double sealing makes sampling safer and provides an extra layer of protection. The three stem O-rings seal the inner cavity of the valve cover to ensure that the valve stem does not leak out. The upper end of the O-ring is also provided with a combined V-shaped packing, which includes an upper packing, a middle packing and a lower packing. The V-shaped packing is compressed by the tightening bolts of the packing gland, which provides an extra layer of protection for the stem seal. The sealing performance can be further improved by adjusting the tightening bolts of the packing gland. A valve cover O-ring is provided on the outer side of the upper valve cover. The valve cover O-ring forms the first seal with the valve body. The upper end of the O-ring is provided with a valve body gasket. By tightening the bolts and nuts, the valve body gasket is compressed, and the valve body gasket forms a second seal with the valve body, which greatly reduces the possibility of leakage. The valve cover is provided with a double seal to improve the sealing effect.

[0010] Preferably, the outer wall of the valve stem is threadedly connected with a supporting bolt and is located above the packing gland. An annular inner cavity is formed between the packing gland and the upper valve cover, and the annular inner cavity is sequentially installed with upper packing, middle packing and lower packing from top to bottom.

[0011] Preferably, the upper valve cover is threadedly connected to the valve body by bolts and is locked by nuts.

[0012] Preferably, the bottom of the valve stem is fixedly connected to a valve core, the bottom of the valve body is threadedly connected to a sampling bottle connector, the bottom of the inner wall of the sampling bottle connector is threadedly connected to a sampling bottle, a sampling hole is provided at the bottom of the valve body, and moves downward to connect with the sampling bottle, the top of the sampling hole is conically arranged and fits with the outer wall of the valve core.

[0013] Compared with the prior art, the utility model provides a self-resetting sampling valve, which has the following beneficial effects:

[0014] 1. The self-resetting sampling valve has the function of spring reset and automatic valve closing, so that the sample flows from the sample inlet to the sample outlet, and the sampling is carried out in real time, ensuring the authenticity and real-time nature of the sample sampling.

[0015] 2. The self-resetting sampling valve is used in conjunction with the valve body, valve cover, valve core, valve stem, valve seat, spring, packing, O-ring and sampling bottle. The sampling bottle is detachable. Press the handle to open the sampling port, and the sample enters the sampling bottle. Remove the sampling bottle and the matching sampling bottle cap can seal the sampling bottle to avoid contamination of the sample. The flow channel has no retention and no flow resistance, and does not affect the flow rate. The valve stem and valve core are pulled up and down to accurately control the flow rate and the sampling volume. The sampling bottle can be selected from transparent and light-proof. This sampling valve is widely used in pharmaceutical, chemical, nuclear power and food industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the utility model.

[0020] In the figure: 1. Valve body; 2. Valve body gasket; 3. Packing gland; 4. Cam; 5. Spring base; 6. Spring adjustment upper seat; 7. Upper valve cover; 8. Spring return base; 9. Spring adjustment external hexagon fixing bolt; 10. Upper packing; 11. Lower packing; 12. Middle packing; 13. Packing gland fixing bolt; 14. Support bolt; 15. Handle; 16. Opening height adjustment hand wheel; 17. Locking nut; 18. Spring adjustment external hexagon locking thread groove; 19. Pin; 20. Sampling bottle; 21. Sampling bottle connector; 22. Bolt; 23. Nut; 25. Circlip; 26. Valve stem pressing gasket; 27. Spring; 28. Valve stem; 29. ​​Valve core; 30. Valve cover O-ring; 31. Valve stem O-ring. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0025] like Figure 1-3As shown, the utility model provides a self-resetting sampling valve, comprising: a valve body 1, a valve cover 7 is arranged on the top of the valve body 1, and then the top of the valve cover 7 is fixedly connected to the spring reset base 8 by a hexagon socket bolt, a spring adjustment upper seat 6 is arranged on the top of the spring reset base 8, and the spring adjustment upper seat 6 is threadedly connected to the inner wall of the spring reset base 8, and the top of the spring adjustment upper seat 6 is threadedly connected to an opening height adjustment hand wheel 16, and the opening height adjustment hand wheel 16 can be adjusted by setting the opening height adjustment hand wheel 1 6, controls the opening height of the valve stem 28. When the opening height adjustment hand wheel 16 is adjusted downward, the distance between the opening height adjustment hand wheel 16 and the valve stem 28 is reduced. When the handle 15 is pressed, the valve stem 28 hits the top rod of the opening height adjustment hand wheel 16, the valve opening height is limited, and the sampling flow is also limited to a specific flow, to avoid the inability to obtain the minimum capacity due to the opening height being too large. It is more suitable for taking a capacity of 3 to 10ML. On the contrary, if the sampling flow is too small, the opening height adjustment hand wheel 16 can be adjusted downward. When adjusting upward, the valve stem 28 hits the top rod of the opening height adjustment hand wheel 16, the height of the valve opening is increased, and the sampling flow rate is also increased, which is more suitable for taking a capacity of 300-1000ML. The outer wall of the opening height adjustment hand wheel 16 is threadedly connected with a locking nut 17, and fits with the top of the spring adjustment upper seat 6. The inner wall of the spring return base 8 is movably connected with the spring base 5. A packing gland 3 is installed on the top of the upper valve cover 7, and the packing gland 3 is fixed to the upper valve cover 7 by two packing gland fixing bolts 13. A through hole is provided at the bottom of the spring base 5, and the valve stem 28 is installed on the inner wall of the through hole. Then, two threaded sleeves are used to fix the top of the valve stem 28. The bottom of the valve stem 28 moves downward to penetrate the packing gland 3 and the upper valve cover 7 and extend to the inside of the valve body 1 to cooperate with the valve core 29 to close and take out materials. A cam 4 is installed on the outer wall of the valve stem 28. A movable hole is provided on one side of the spring return base 8. A handle 15 is fixedly connected to one side of the cam 4, and the cam 4 is rotatably connected to the spring return base 8 through the pin 19, which is used to pry the cam 4 upward. Then, a retaining ring 25 is used to fix the pin 19 on the outside of the pin 19 to limit the pin 19 from being separated from the handle 15.

[0026] The outer wall fixing sleeve of the valve stem 28 is provided with a valve stem pressing gasket 26, which is located below the cam 4 and is used to cooperate with the cam 4 to press down the valve stem 28. The bottom of the inner wall of the spring base 5 and the top of the inner wall of the spring adjustment upper seat 6 are respectively provided with an annular groove, and a spring 27 is installed in the annular groove for resetting the spring base 5 downward to drive the valve stem 28 to move downward. The outer wall of the spring adjustment upper seat 6 is provided with a spring adjustment external hexagonal locking thread groove 18, and the outer wall of the spring adjustment external hexagonal locking thread groove 18 is threadedly connected with a spring adjustment external hexagonal fixing bolt 9, and the bottom is in contact with the spring reset base 8 for locking the spring reset base 8. The tightness of the spring can be adjusted by adjusting the spring adjusting upper seat 6 without disassembling the valve and shutting down the machine. The tightness of the spring can be easily adjusted by a wrench. For example, when the working pressure of the sampling valve is low, the spring adjusting upper seat 6 can be adjusted upward, and the spring 27 is in a relaxed state, which can reduce the pressing force of the handle 15 and make sampling easier. The spring adjusting upper seat 6 can also be adjusted downward. With the increase of years of use and the increase of sampling frequency, slight leakage occurs on the sealing surface. The spring adjusting upper seat 6 can also be adjusted downward. The elastic force of the spring 27 is increased, and the force applied to the valve seat is also increased, so that slight leakage can be easily solved.

[0027] An annular groove is provided at the top between the valve bodies 1, a valve body gasket 2 is installed between the upper valve cover 7 and the annular groove, a first installation groove is provided on the outer wall of the upper valve cover 7, and a valve cover O-ring 30 is installed on the inner wall of the first installation groove and fits with the inner wall of the valve body 1, a second installation groove is provided on the outer wall of the valve stem 28, a valve stem O-ring 31 is installed in the second installation groove and fits with the inner wall of the upper valve cover 7. The second installation groove is provided with three valve stem O-rings 31, and a double sealing structure is formed by providing valve stem O-rings 31 and V-type packing. The double sealing makes sampling safer and provides an extra layer of protection. The three valve stem O-rings 31 seal the inner cavity of the valve cover to ensure that the valve stem 28 does not leak out. A combined V-type packing is also provided on the upper end of the O-ring, and a total of an upper packing 10, a middle packing 12 and a lower packing 11 are provided. The V-type packing is compressed by the tightening bolts of the packing gland 3 to make the valve The rod 28 seal has an extra layer of protection, and the sealing performance can be further improved by adjusting the packing gland and tightening the bolts 13; a valve cover O-ring 30 is provided on the outer side of the upper valve cover 7, and the valve cover O-ring 30 forms a first seal with the valve body, and a valve body gasket 2 is provided on the upper end of the O-ring. By tightening the bolts 22 and the nuts 23, the valve body gasket 2 is compressed, and the valve body gasket 2 forms a second seal with the valve body, which greatly reduces the possibility of external leakage, so that the valve cover is equipped with double seals to improve the sealing effect.

[0028] The outer wall of the valve stem 28 is threadedly connected with a supporting bolt 14 and is located above the packing gland 3. An annular inner cavity is formed between the packing gland 3 and the upper valve cover 7, and the upper packing 10, the middle packing 12 and the lower packing 11 are installed in the annular inner cavity from top to bottom. The upper valve cover 7 is threadedly connected to the valve body 1 by bolts 22 and locked by nuts 23.

[0029] The bottom of the valve stem 28 is fixedly connected to the valve core 29, the bottom of the valve body 1 is threadedly connected to the sampling bottle connector 21, the bottom of the inner wall of the sampling bottle connector 21 is threadedly connected to the sampling bottle 20, and a sampling hole is opened at the bottom of the valve body 1, which moves downward to connect with the sampling bottle 20. The top of the sampling hole is conically set and fits with the outer wall of the valve core 29.

[0030] The working principle of the self-resetting sampling valve is described in detail below.

[0031] like Figure 1-3 As shown, when in use, the self-resetting sampling valve is installed on the pipeline, and the sample flows from the sample port inlet to the sample outlet. The flow channel is straight-through and has no flow resistance, which does not affect the pipeline flow. Then the handle 15 is screwed into the cam 4 through a thread. The cam 4 is hinged to the spring reset base 8 with a pin 19. When sampling, the handle 15 is pressed downward. Using the lever principle, the cam 4 lifts the spring base 5 upward. The spring base 5 simultaneously lifts the valve stem 28 and the valve core 29 upward. The valve core 29 is embedded in the valve stem 28. A gap is formed between the valve core 29 and the valve body 1. The sample flows into the sampling bottle 20, and the exhaust port discharges the pressure in the pipeline at the same time. The sampling bottle 20 is in a pressure-free state. The sampling bottle 20 is marked with a scale. Observe the volume flowing into the sampling bottle 20, take a sample of appropriate volume, loosen the handle 15, and the spring automatically rebounds. The spring 27 pushes the spring base 5 to move downward, and at the same time drives the valve stem 28 and the valve core 29 to move downward. The valve core 29 fits with the valve body 1 to seal the sampling port, unscrew the sampling bottle 20, and use the matching sampling bottle cap to cover the sampling bottle 20, and send the sample to the laboratory for testing.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A self-resetting sampling valve, comprising: A valve body (1) is characterized in that: an upper valve cover (7) is arranged on the top of the valve body (1), the top of the upper valve cover (7) is fixedly connected to a spring return base (8) by means of a hexagon socket bolt, a spring adjustment upper seat (6) is arranged on the top of the spring return base (8), the top of the spring adjustment upper seat (6) is threadedly connected to an opening height adjustment hand wheel (16), and the outer wall of the opening height adjustment hand wheel (16) is threadedly connected to a locking nut (17) and fits with the top of the spring adjustment upper seat (6), the inner wall of the spring return base (8) is movably connected to a spring base (5), a packing gland (3) is installed on the top of the upper valve cover (7), and is fixedly connected to the top of the spring adjustment upper seat (6) by means of two packing glands (3). The gland fixing bolt (13) is fixed on the upper valve cover (7), a through hole is opened at the bottom of the spring base (5), and a valve stem (28) is installed on the inner wall of the through hole, the top of the valve stem (28) is fixedly connected by two threaded sleeves, the bottom of the valve stem (28) is movable downward to pass through the packing gland (3) and the upper valve cover (7) and extend to the inside of the valve body (1), a cam (4) is installed on the outer wall of the valve stem (28), a movable hole is opened on one side of the spring return base (8), a handle (15) is fixedly connected to one side of the cam (4), and the cam (4) is rotatably connected to the spring return base (8) through a pin (19) for prying the cam (4) upward.

2. The self-resetting sampling valve according to claim 1, characterized in that: A retaining spring (25) is clamped on the outer side of the pin (19) to prevent the pin (19) from being separated from the handle (15).

3. The self-resetting sampling valve according to claim 1, characterized in that: The outer wall fixing sleeve of the valve stem (28) is provided with a valve stem pressing gasket (26), which is located below the cam (4) and is used to cooperate with the cam (4) to press the valve stem (28) downward.

4. The self-resetting sampling valve according to claim 1, characterized in that: The bottom of the inner wall of the spring base (5) and the top of the inner wall of the spring adjustment upper seat (6) are respectively provided with an annular groove, and a spring (27) is installed in the annular groove for resetting the spring base (5) downward to drive the valve stem (28) to move downward, and the outer wall of the spring adjustment upper seat (6) is provided with a spring adjustment external hexagonal locking thread groove (18), and the outer wall of the spring adjustment external hexagonal locking thread groove (18) is threadedly connected with a spring adjustment external hexagonal fixing bolt (9), and the bottom is in contact with the spring reset base (8) for locking the spring reset base (8).

5. The self-resetting sampling valve according to claim 1, characterized in that: An annular groove is provided at the top between the valve bodies (1), a valve body gasket (2) is installed between the upper valve cover (7) and the annular groove, a first mounting groove is provided on the outer wall of the upper valve cover (7), a valve cover O-ring (30) is installed on the inner wall of the first mounting groove and fits with the inner wall of the valve body (1), a second mounting groove is provided on the outer wall of the valve stem (28), a valve stem O-ring (31) is installed in the second mounting groove and fits with the inner wall of the upper valve cover (7).

6. The self-resetting sampling valve according to claim 1, characterized in that: The outer wall of the valve stem (28) is threadedly connected with a supporting bolt (14) and is located above the packing gland (3). An annular inner cavity is formed between the packing gland (3) and the upper valve cover (7), and the annular inner cavity is installed with an upper packing (10), a middle packing (12) and a lower packing (11) in sequence from top to bottom.

7. The self-resetting sampling valve according to claim 1, characterized in that: The upper valve cover (7) is threadedly connected to the valve body (1) via bolts (22) and is locked via nuts (23).

8. The self-resetting sampling valve according to claim 1, characterized in that: The bottom of the valve stem (28) is fixedly connected to a valve core (29), the bottom of the valve body (1) is threadedly connected to a sampling bottle connector (21), the bottom of the inner wall of the sampling bottle connector (21) is threadedly connected to a sampling bottle (20), a sampling hole is provided at the bottom of the valve body (1), and is movably penetrated downward to communicate with the sampling bottle (20), the top of the sampling hole is conically arranged and fits with the outer wall of the valve core (29).

Images