Integrated closed sampling valve

Abstract

The utility model discloses an integrated closed sampling valve which comprises a valve main body and a sampling valve body, the valve main body is of a cavity structure with openings at two ends, the sampling valve body is movably arranged on an inclined plane, a medium passage is arranged in the valve main body, and a closed sampling port is arranged at the lower part of the valve main body. The top and the rear side of the valve body are provided with a purging connector, a tail gas exhaust port and a closed sampling port correspondingly, the purging connector and the tail gas exhaust port are both in through connection with the medium channel, and a connecting structure and a sealing structure are embedded into the inner sides of the opening portions of the closed sampling port, the purging connector and the tail gas exhaust port correspondingly. And when the sampling valve body is closed, the sampling pipeline can be purged through the purging pipeline. According to the integrated closed sampling valve, sampling, purging, medium circulation and tail gas emission are integrated on the valve main body, so that the integrated closed sampling valve not only can realize the circulation of a sampling medium and obtain a real sample, but also can realize closed sampling and avoid air pollution. The sampling device is compact in structure, small in size, simple to operate and convenient to sample.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an integrated closed sampling valve. Background Art

[0002] The sampling valve is a valve used to obtain medium samples in pipelines or equipment. It is used in situations where chemical analysis of medium samples is required frequently. At present, the sampling valves used for oil and natural gas have poor sealing after sampling, which is easy to cause leakage and environmental pollution. Some sampling valves have complex structures and processes, difficult assembly, high scrap rates, and large volumes. In addition, under high-pressure conditions, the metal seal has a large closing torque, and the sealing surface is easily scratched, which can easily cause valve leakage. The handheld operating components are also prone to loosening and leakage, and related parts may fuse and bite. Defects such as the phenomenon lead to a short service life of the sampling valve body and difficulty in maintenance. In addition, the existing sampling valve body has a single function and cannot directly clean the inside of the pipeline, and the sample quality cannot be guaranteed. There is no exhaust function on the valve body, so the internal exhaust gas cannot be discharged in time, and closed sampling cannot be achieved. It is easily polluted by air, and sometimes the real sample cannot be obtained.

[0003] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an integrated closed sampling valve with compact structure, small volume, simple operation and convenient sampling.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] An integrated closed sampling valve comprises: a valve body and a sampling valve body, wherein the valve body is a cavity structure with openings at both ends, an inclined surface is provided on the upper front side of the valve body, and the sampling valve body is movably arranged on the inclined surface, a medium passage is provided inside the valve body, and the medium passage is respectively connected with the openings at both ends of the valve body, a closed sampling port is provided at the lower part of the valve body, a purge interface and an exhaust gas discharge port are respectively provided on the top and the rear side of the valve body, the closed sampling port, the purge interface and the exhaust gas discharge port are respectively connected with the medium passage, and the inner sides of the mouths of the closed sampling port, the purge interface and the exhaust gas discharge port are respectively embedded with a connecting structure and a sealing structure, and when the sampling valve body is closed, the sampling pipeline can be purged through the purge pipeline.

[0007] In the above structure, the valve body includes a housing and a valve core, the valve core is movably arranged in the housing, the valve core matches the medium passage, and the valve core is movably connected to the medium passage and the sampling valve body respectively.

[0008] In the above structure, a mounting hole is provided on the inclined surface, and the mounting hole is arranged perpendicular to the inclined surface. The sampling valve body passes through the mounting hole and is detachably connected to the valve core. The sampling valve body controls the opening and closing of the closed sampling port through the valve core.

[0009] In the above structure, the shell is provided with a first pipeline, a second pipeline and a third pipeline respectively corresponding to the closed sampling port, the purge interface and the exhaust gas discharge port, and the sampling valve body is perpendicular to the inclined surface and is provided corresponding to the first pipeline.

[0010] In the above structure, the interior of the valve body is provided with limiting structures corresponding to the purge interface and the exhaust gas discharge port, and the valve body is movably provided with valves corresponding to the purge interface and the exhaust gas discharge port.

[0011] In the above structure, the connection structure includes a threaded structure and a rotating buckle structure.

[0012] The beneficial effects of the utility model are:

[0013] The utility model improves the existing sampling valve structure, integrates sampling, purging, medium circulation, and tail gas emission in one valve body, when the valve is opened for sampling, the valve is closed to stop sampling, and the purging valve is opened to purge the sampling pipeline to prevent medium residue, the integrated closed sampling valve can realize the circulation of the sampling medium to obtain the real sample, and can also realize closed sampling to avoid air pollution. The utility model has a compact structure, a small size, simple operation, and convenient sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of an embodiment of the integrated closed sampling valve of the utility model;

[0015] Figure 2 It is a cross-sectional view of the local structure of an embodiment of the integrated closed sampling valve of the utility model.

[0016] Figure 3 This is a flow chart of an embodiment of the integrated closed sampling valve of the utility model.

[0017] In the figure, 1-valve body, 2-sampling valve body, 3-closed sampling port, 4-purge interface, 5-exhaust gas discharge port, 6-medium passage. DETAILED DESCRIPTION

[0018] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] like Figure 1-2 As shown, the integrated closed sampling valve comprises: a valve body 1 and a sampling valve body 2. The valve body 1 is a cavity structure with openings at both ends. The front upper part of the valve body 1 is provided with an inclined surface, and the sampling valve body 2 is movably arranged on the inclined surface. A medium passage 6 is arranged inside the valve body 1, and the medium passage 6 is respectively connected with the openings at both ends of the valve body 1. A closed sampling port 3 is arranged at the lower part of the valve body 1. A purge interface 4 and an exhaust gas discharge port 5 are respectively arranged on the top and the rear side of the valve body 1. The closed sampling port 3, the purge interface 4 and the exhaust gas discharge port 5 are respectively connected with the medium passage 6. The inner sides of the mouths of the closed sampling port 3, the purge interface 4 and the exhaust gas discharge port 5 are respectively embedded with a connecting structure and a sealing structure. When the sampling valve body is closed, the sampling pipeline can be purged through the purge pipeline.

[0020] Specifically, in this embodiment, the sampling pipeline is arranged at the lower part of the valve body 1 and corresponds to the sampling valve body 2, and the closed sampling port 3 is integrally arranged at the lower part of the sampling pipeline.

[0021] Specifically, in this embodiment, the medium passage 6 includes a medium inlet and a medium outlet arranged at two ends of the shell.

[0022] In a preferred embodiment of the utility model, the valve body 1 includes a housing and a valve core, the valve core is movably arranged in the housing, the valve core matches the medium passage 6, and the valve core is movably connected to the medium passage 6 and the sampling valve body 2 respectively.

[0023] Specifically, in this embodiment, a space for the valve core to move is provided inside the shell corresponding to the sampling valve body 2 .

[0024] In a preferred embodiment of the utility model, a mounting hole is provided on the inclined surface, the mounting hole is arranged perpendicular to the inclined surface, the sampling valve body 2 passes through the mounting hole and is detachably connected to the valve core, and the sampling valve body 2 controls the opening and closing of the closed sampling port 3 through the valve core.

[0025] In a preferred embodiment of the utility model, the shell is respectively provided with a first pipeline, a second pipeline and a third pipeline corresponding to the closed sampling port 3, the purge interface 4 and the exhaust gas discharge port 5, and the sampling valve body 2 is vertically inclined and arranged corresponding to the first pipeline.

[0026] Specifically, in this embodiment, the first pipeline is a sampling pipeline, the second pipeline is a purge pipeline, and the third pipeline is an exhaust gas emission pipeline.

[0027] In a preferred embodiment of the present invention, the valve body 1 is internally provided with limiting structures corresponding to the purge interface 4 and the exhaust gas discharge port 5, and the valve body 1 is movably provided with valves corresponding to the purge interface 4 and the exhaust gas discharge port 5.

[0028] Specifically, in the present embodiment, the setting of the limiting structure avoids defects such as fusion and biting of related parts, and can also prevent the risk of leakage caused by loosening of the handheld operating component.

[0029] In a preferred embodiment of the present invention, the closed sampling port 3 adopts a double-needle closed sampling form.

[0030] Specifically, in this embodiment, the double needle form is a sampling form of the closed sampler, and the double needles are inserted into the glass bottle, one needle is connected to the interface outlet, and the other needle is connected to the exhaust hole to ensure that the medium will not escape into the air during sampling.

[0031] In a preferred embodiment of the utility model, the connection structure includes a threaded structure and a rotating buckle structure.

[0032] Specifically, in this embodiment, Figure 3 The integrated closed sampling valve shown includes a valve body 1, a sampling valve body 2, and a closed sampling interface 3. The valve body 1 has an interface for connecting the medium passage 6. The upper end of the second pipeline is connected to the purge pipeline interface. The lower end of the first pipeline is a closed sampling port. The third pipeline has an exhaust gas discharge port that can be connected to the shell (adsorption tank). The valve is opened for sampling, and the valve is closed to stop sampling. The purge valve is opened to purge the sampling pipeline to prevent medium residue. The sampling valve body 2 controls the opening and closing of the sampling port. When the sampling valve body 2 is closed, the sampling pipeline can be purged through the purge pipeline. The closed sampling interface can adopt a double needle form or other closed sampling forms. The integrated closed sampling valve can realize the circulation of the sampling medium and obtain real samples, and can also realize closed sampling to avoid air pollution.

[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. Integrated closed sampling valve, characterized in that: The utility model comprises: a valve body and a sampling valve body, wherein the valve body is a cavity structure with openings at both ends, an inclined surface is provided on the upper front side of the valve body, and the sampling valve body is movably arranged on the inclined surface, a medium passage is provided inside the valve body, and the medium passage is respectively connected with the openings at both ends of the valve body, a closed sampling port is provided at the lower part of the valve body, a purge interface and an exhaust gas discharge port are respectively provided on the top and the rear side of the valve body, the closed sampling port, the purge interface and the exhaust gas discharge port are respectively connected with the medium passage, and the inner sides of the mouths of the closed sampling port, the purge interface and the exhaust gas discharge port are respectively embedded with a connecting structure and a sealing structure, and when the sampling valve body is closed, the sampling pipeline can be purged through the purge pipeline.

2. The integrated closed sampling valve according to claim 1, characterized in that: The valve body comprises a shell and a valve core, the valve core is movably arranged in the shell, the valve core matches the medium passage, and the valve core is movably connected to the medium passage and the sampling valve body respectively.

3. The integrated sealed sampling valve according to claim 2, characterized in that: The inclined surface is provided with a mounting hole, the mounting hole is arranged perpendicular to the inclined surface, the sampling valve body passes through the mounting hole and is detachably connected to the valve core, and the sampling valve body controls the opening and closing of the closed sampling port through the valve core.

4. The integrated sealed sampling valve according to claim 3, characterized in that: The shell is provided with a first pipeline, a second pipeline and a third pipeline respectively corresponding to the closed sampling port, the purge interface and the tail gas discharge port, and the sampling valve body is perpendicular to the inclined surface and is arranged corresponding to the first pipeline.

5. The integrated sealed sampling valve according to claim 1, characterized in that: The interior of the valve body is provided with limiting structures corresponding to the purge interface and the exhaust gas discharge port, and the valve body is movably provided with valves corresponding to the purge interface and the exhaust gas discharge port.

6. The integrated sealed sampling valve according to claim 1, characterized in that: The connection structure includes a thread structure and a rotation buckle structure.

Images