Closed sampler

Abstract

The utility model discloses a closed sampler. The closed sampler comprises a valve shell, a bracket and a valve rod, the support comprises a base, a connecting rod and a supporting sleeve. The base is fixed to the top of the valve shell, a threaded hole is formed in the bottom of the valve shell, a valve rod is in threaded connection with the supporting sleeve in a penetrating mode, the valve rod penetrates through the base and the top of the valve shell in a sealed mode, and the bottom end of the valve rod is in threaded connection in the threaded hole. The device has the advantages that during sampling, the sampling bottle is screwed at the threaded connection hole, in the process of driving the valve rod to ascend, a liquid medium flows into the sampling bottle through the threaded hole, and after sampling is finished, the valve rod is driven to descend, so that the screw joint is screwed into the threaded hole, and the threaded hole is closed; the sampling device has the advantages of convenience in sampling operation, simple structure, low cost and low maintenance cost.

Description

Technical Field:

[0001] The utility model relates to the technical field of sampling equipment, in particular to a closed sampler. Background Art:

[0002] In the chemical industry, it is usually necessary to use a sampling device to sample non-corrosive liquids or gases for the analysis and detection of purity or component content. The existing sampling devices are to purchase existing closed samplers on the market, but they have complex structures, high precision, high manufacturing costs, and high costs.

[0003] There is also a method of sampling using a sampling bottle connected to a pipeline, but the sampling steps are cumbersome and the efficiency is low. See Figure 1 the sampling bottle sampling system in, and its sampling steps are as follows: First step, first open valves ⑨②③④⑤⑦ to perform nitrogen replacement on the sampling bottle ⑩; Second step, close valves ⑨③④⑦, open valves ①⑧⑥, and replace the material in the pipeline with fresh material; Third step, close valves ⑦⑧, open valves ③④, the material enters the sampling bottle, after the sampling bottle is full, close valves ③④, disassemble the sampling bottle, and install a new sampling bottle, and then repeat the above operations; The above steps are numerous, prone to leakage, and there are certain safety hazards due to the frequent disassembly and assembly of the sampling bottle.

[0004] Therefore, the existing sampling devices are either expensive or cumbersome to operate, and neither can be popularized. Content of the Utility Model:

[0005] The purpose of the utility model is to provide a closed sampler with a simple structure and convenient sampling.

[0006] The utility model is implemented by the following technical solutions: A closed sampler includes a valve housing, a bracket, and a valve rod; the bracket includes a base, a connecting rod, and a support sleeve; the base is fixed on the top of the valve housing, a threaded hole is opened at the bottom of the valve housing, the valve rod is screwed through the support sleeve, the valve rod seals through the base and the top of the valve housing, and the bottom end of the valve rod is screwed into the threaded hole.

[0007] Further, a guide sleeve coaxially arranged with the valve rod is fixed on the inner bottom surface of the valve housing, and the valve rod passes through the guide sleeve.

[0008] Further, the valve rod is divided into a threaded section, a smooth shaft section, a stepped shaft section, a tapered closing section, and a screw joint from top to bottom.

[0009] Further, a handwheel is sleeved and clamped on the threaded section above the support sleeve, and a nut that abuts against the handwheel is sleeved and screwed on the threaded section above the handwheel.

[0010] Further, the inner hole structure of the guide sleeve is adapted to the stepped shaft section and the tapered necking section. The stepped shaft section and the tapered necking section are movably placed inside the guide sleeve, and the screw joint is screwed into the threaded hole.

[0011] Further, sealing rings are respectively embedded in the top surface and the internal step of the guide sleeve.

[0012] Further, a connecting seat corresponding to the position of the threaded hole is integrally formed on the outer bottom surface of the valve housing. A threaded connection hole communicating with the threaded hole is provided on the bottom surface of the connecting seat, and a sampling bottle is screwed onto the threaded connection hole.

[0013] Further, packing is filled around the valve stem inside the base. A gland is sleeved on the valve stem above the packing, and the top surface edge of the gland is connected to the edge of the base by bolts passing through.

[0014] Advantages of the present utility model: During sampling, the sampling bottle is tightened at the threaded connection hole. When the valve stem is driven to rise, the liquid medium flows into the sampling bottle through the threaded hole. After sampling, the valve stem is driven to descend, so that the screw joint is screwed into the threaded hole to close the threaded hole. The sampling operation of the present utility model is convenient, the structure is simple, the cost is low, and the maintenance cost is also low. Description of the drawings:

[0015] Figure 1 It is a schematic structural diagram of the existing sampling bottle sampling system described in the background art.

[0016] Figure 2 It is a schematic structural diagram of the present utility model.

[0017] Figure 3 It is Figure 2 a partial enlarged view of A of

[0018] The markings of each component in the drawings are as follows: valve housing 1, threaded hole 1.1, bracket 2, base 2.1, connecting rod 2.2, support sleeve 2.3, valve stem 3, threaded section 3.1, optical axis section 3.2, stepped shaft section 3.3, tapered necking section 3.4, screw joint 3.5, guide sleeve 4, handwheel 5, nut 6, sealing ring 7, connecting seat 8, threaded connection hole 8.1, sampling bottle 9, packing 10, gland 11, bolt 12. Specific embodiments:

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] As Figure 2 and Figure 3 shown, this embodiment provides a closed sampler, which includes a valve housing 1, a bracket 2 and a valve stem 3; both ends of the valve housing 1 are communicated. During use, both ends of the valve housing 1 are connected to the pipeline that needs to be sampled at the production site through flange plates. During the production process, the medium in the pipeline normally flows through the valve housing 1; the valve stem 3 is divided into a threaded section 3.1, a smooth shaft section 3.2, a stepped shaft section 3.3, a tapered closing section 3.4 and a screw joint 3.5 from top to bottom.

[0022] The bracket 2 includes a base 2.1, a connecting rod 2.2 and a support sleeve 2.3. The base 2.1 is fixed on the top of the valve housing 1. The smooth shaft section 3.2 of the valve stem 3 is sealed through the base 2.1 and the top of the valve housing 1. In this embodiment, the packing 10 is filled around the valve stem 3 in the base 2.1. A compression sleeve 11 is sleeved on the valve stem 3 above the packing 10. The edge of the top surface of the compression sleeve 11 is connected to the edge of the base 2.1 through a bolt 12; the compression sleeve 11 presses the packing 10 through the bolt 12 to play a sealing role and prevent the medium in the valve housing 1 from leaking from the base 2.1.

[0023] The valve stem 3 is screwed through the support sleeve 2.3. The support sleeve 2.3 is provided with internal threads, which cooperate with the threaded section 3.1 of the valve stem 3 to support the valve stem 3 through the support sleeve 2.3, and the valve stem 3 rises or falls during rotation; a handwheel 5 is sleeved and clamped on the threaded section 3.1 above the support sleeve 2.3, and a nut 6 that abuts against the handwheel 5 is sleeved and screwed on the threaded section 3.1 above the handwheel 5. The staff drives the valve stem 3 to rotate through the handwheel 5, which is convenient for operation.

[0024] A guide sleeve 4 coaxial with the valve stem 3 is fixed to the inner bottom surface of the valve housing 1, and the valve stem 3 passes through the guide sleeve 4. A threaded hole 1.1 is formed at the bottom of the valve housing 1, and the screw joint 3.5 of the valve stem 3 is screwed into the threaded hole 1.1. When the valve stem 3 is rotated forward to make it rise, the screw joint 3.5 gradually screws out of the threaded hole 1.1, facilitating the medium in the valve housing 1 to flow out from the threaded hole 1.1 to achieve sampling. When the valve stem 3 is rotated backward to make it descend, until the screw joint 3.5 is screwed into the threaded hole 1.1, sealing is achieved to prevent the medium from flowing out.

[0025] The inner hole structure of the guide sleeve 4 is adapted to the stepped shaft section 3.3 and the tapered closing section 3.4 of the valve stem 3, and the stepped shaft section 3.3 and the tapered closing section 3.4 of the valve stem 3 are movably placed inside the guide sleeve 4. From the optical shaft section 3.2 to the stepped shaft section 3.3 and then to the tapered closing section 3.4 of the valve stem 3, its cross-section gradually decreases, facilitating the outflow of a small amount of medium for sampling. In addition, the tapered closing section 3.4 is more conducive to the downward outflow of the liquid medium, reducing residue. Moreover, the bottom end of the tapered closing section 3.4 is a pointed cone, reducing the contact area with air and preventing the remaining part of the chemical from reacting with air to generate other solids or corrosive substances, causing blockage or corrosion of the sampler. Sealing rings 7 are respectively embedded in the top surface and the internal step of the guide sleeve 4. When the valve stem 3 descends until the screw joint 3.5 is screwed into the threaded hole 1.1, the steps at both ends of the stepped shaft section 3.3 of the valve stem 3 are respectively pressed against the corresponding sealing rings 7, further playing a sealing role and effectively preventing the medium from leaking from the threaded hole 1.1.

[0026] An integral connection seat 8 corresponding to the position of the threaded hole 1.1 is formed on the outer bottom surface of the valve housing 1. A threaded connection hole 8.1 communicating with the threaded hole 1.1 is formed on the bottom surface of the connection seat 8, and a sampling bottle 9 is screwed onto the threaded connection hole 8.1. When sampling is required, the sampling bottle 9 is tightened at the threaded connection hole 8.1. During the process of driving the valve stem 3 to rise, the medium flows into the sampling bottle 9 through the threaded hole 1.1. After sampling, the valve stem 3 is driven to descend, so that the screw joint 3.5 is screwed into the threaded hole 1.1 to close the threaded hole 1.1. The sampling operation of the present utility model is convenient, the structure is simple, the cost is low, and the maintenance cost is also low.

[0027] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A closed sampler, characterized in that, It includes a valve housing, a bracket and a valve stem; the bracket includes a base, a connecting rod and a support sleeve; The base is fixed on the top of the valve housing. A threaded hole is provided at the bottom of the valve housing. The valve stem is screwed through the support sleeve. The valve stem seals through the base and the top of the valve housing, and the bottom end of the valve stem is screwed into the threaded hole.

2. The hermetic sampler according to claim 1, wherein, A guide sleeve coaxial with the valve stem is fixed on the inner bottom surface of the valve housing, and the valve stem passes through the guide sleeve.

3. The hermetic sampler according to claim 2, characterized in that, The valve stem is divided into a threaded section, a smooth shaft section, a stepped shaft section, a tapered closing section and a screw joint from top to bottom.

4. The hermetic sampler according to claim 3, characterized in that, A handwheel is sleeved and clamped on the threaded section above the support sleeve, and a nut that abuts against the handwheel is sleeved and screwed on the threaded section above the handwheel.

5. The hermetic sampler according to claim 3, wherein, The inner hole structure of the guide sleeve is adapted to the stepped shaft section and the tapered closing section. The stepped shaft section and the tapered closing section are movably placed in the guide sleeve, and the screw joint is screwed into the threaded hole.

6. The hermetic sampler according to claim 5, wherein, Sealing rings are respectively embedded in the top surface and the internal step of the guide sleeve.

7. A closed sampler according to any one of claims 1 to 6, characterized in that, A connection seat corresponding to the position of the threaded hole is integrally formed on the outer bottom surface of the valve housing. A threaded connection hole communicating with the threaded hole is provided on the bottom surface of the connection seat, and a sampling bottle is screwed on the threaded connection hole.

8. A closed sampler according to claim 7, characterized in that, Packing is filled around the valve stem in the base. A compression sleeve is sleeved on the valve stem above the packing, and the top surface edge of the compression sleeve is connected to the base edge by bolts passed through.

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