Closed sampling valve with corrosion-resistant function

Abstract

The utility model provides a closed sampling valve with a corrosion-resistant function, which comprises a sampling valve, the sampling valve consists of a stop valve and a sampling mechanism, the sampling mechanism is connected with the outlet end of the stop valve, the stop valve comprises a valve body, a connecting flange, a valve handle and a valve core, and a cleaning mechanism is fixedly mounted at the bottom of the valve body. The closed sampling valve is used for closed sampling of media, the whole sampling process is operated in a closed environment, the pollution problem caused by medium leakage can be avoided, the closed sampling valve is particularly suitable for closed sampling of volatile and corrosive media, the cleaning mechanism is arranged and can be used for discharging residual media in the valve body, and the sampling efficiency is improved. According to the closed sampling valve, the problem of corrosion of the sampling valve caused by medium residues is avoided, the sampling mechanism is arranged, sealing connection of the sampling bottle can be facilitated, the leakage problem in the sampling process is prevented, meanwhile, the sampling pipe is plugged after sampling, dust is prevented from entering the sampling pipe to affect subsequent sampling operation, and the subsequent sampling precision of the closed sampling valve is improved.

Description

Technical Field

[0001] This utility model relates to a sealed sampling valve with corrosion resistance, belonging to the field of sampling valve technology. Background Technology

[0002] The closed-loop sampling valve is a specialized sampling valve that is leak-free, evaporative, and spill-free throughout the entire process. Its core feature is that it completes the sampling of the medium in a completely closed state, protecting personnel, the environment, and the purity of the sample. Throughout the sampling process, the medium remains within the closed system and does not come into contact with the outside air or personnel, resulting in no leakage, evaporation, or splashing.

[0003] A closed-loop sampling valve is a specialized valve body used for sealed sampling. After sampling, the medium may remain inside the valve. After operation, the medium will evaporate and affect the surrounding air quality, making it impossible to effectively remove the residual material inside the valve. This is especially true for sampling volatile or corrosive media, affecting operational safety and easily leading to leakage and pollution problems. The residual medium inside the valve may corrode, and air can easily enter the valve body after sampling, causing pollution. Long-term use will reduce the life of the sampling valve and affect the accuracy of subsequent sampling. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, this utility model provides a sealed sampling valve with corrosion resistance.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0006] This utility model provides a closed sampling valve with corrosion resistance, including a sampling valve, which consists of a stop valve and a sampling mechanism. The sampling mechanism is connected to the outlet end of the stop valve. The stop valve includes a valve body, a connecting flange, a valve handle, and a valve core. A cleaning mechanism is fixedly installed at the bottom of the valve body.

[0007] The sampling mechanism includes a sampling tube, one end of which is fixedly connected to a valve body. The sampling tube has an L-shaped structure, with an internal thread on the inner wall of the bottom end and an inner protrusion on the inner wall above the internal thread. A sampling bottle is located below the sampling tube, and a sealing structure is provided at the bottom end of the sampling tube. A plugging structure is fixedly connected to the top of the sampling tube and is located at the bend of the sampling tube. The plugging structure includes a fixed tube and a handle. The fixed tube is fixedly connected to the top of the sampling tube, and a sealing plate is rotatably connected to the bottom of the handle. The sealing plate is distributed correspondingly to the inner protrusion.

[0008] In this technical solution, the inlet end of the valve body is fixedly connected to the connecting flange, the top of the valve body is threaded with a valve handle, the bottom end of the valve handle is connected with a valve core, and the valve core is fitted and sealed inside the valve body.

[0009] In this technical solution, the cleaning mechanism includes a flushing pipe, the bottom end of which is fixedly connected to a connector, the connector being connected to a positive pressure pipeline for nitrogen delivery, the top end of which is connected through to the bottom of the valve body, and the top end of the flushing pipe having a bent connector with a curved structure, the bent connector being located at the bottom of the valve body.

[0010] In this technical solution, the sampling bottle is threadedly connected to the internal thread, a washer is provided at the top edge of the sampling bottle, the washer contacts the bottom of the inner convex, the inner diameter of the bottle mouth of the sampling bottle is smaller than the inner diameter of the inner convex, and the inner wall of the inner convex has an arc-shaped structure.

[0011] In this technical solution, a breathing valve is fixedly connected to the top of the sampling tube.

[0012] In this technical solution, the sealing structure includes a sleeve and a pressure ring. The sleeve is fixedly connected to the bottom end of the sampling tube. The pressure ring is movably sleeved inside the sleeve and on the surface of the sampling tube. A sealing ring is provided at the bottom edge of the pressure ring, and the sealing ring contacts the surface of the sampling bottle. The sealing ring is sealed to the surface of the sampling tube. The bottom edge of the pressure ring is connected to the sleeve by a spring, and the spring is sleeved on the surface of the pressure ring.

[0013] In this technical solution, the handle is threadedly connected to the sampling tube, a handle is fixedly connected to the top of the handle, a convex shaft is provided in the middle of the handle, and the convex shaft is distributed correspondingly to the fixed tube. A gasket is fixedly connected to the top of the fixed tube, and the gasket is distributed correspondingly to the convex shaft.

[0014] In this technical solution, the diameter of the sealing plate is smaller than the inner diameter of the sampling tube, the bottom end of the handle is provided with a protrusion, the protrusion is distributed correspondingly to the bottom end of the fixing tube, and the bottom end of the fixing tube is provided with a sealing ring located inside the sampling tube.

[0015] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0016] The positive and progressive effects of this utility model are as follows:

[0017] The aforementioned corrosion-resistant closed-loop sampling valve employs a closed-loop sampling method for media sampling. The entire sampling process is conducted in a closed environment, preventing media leakage and contamination. It is particularly suitable for closed-loop sampling of volatile and corrosive media. A cleaning mechanism is included to discharge residual media from the valve body, preventing corrosion and extending the valve's service life. The sampling mechanism facilitates the sealing connection of the sampling bottle, preventing leakage during sampling. Furthermore, the sampling tube is sealed after sampling to prevent dust from entering and affecting subsequent sampling operations, thus improving the sampling accuracy of the closed-loop sampling valve. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the half-section structure of this utility model.

[0020] Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0021] Figure 4 This utility model Figure 2 A magnified schematic diagram of the structure at point B in the middle.

[0022] Figure 5 This is a schematic diagram of the external front view of the present invention.

[0023] Figure 6 This is a schematic diagram of the internal front view of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Sampling valve; 11. Valve body; 111. Connecting flange; 112. Valve handle; 113. Valve core; 12. Flushing pipe; 121. Connector; 122. Elbow connector; 13. Sampling tube; 131. Breather valve; 132. Inner convexity; 133. Sleeve; 134. Pressure ring; 135. Spring; 136. Sealing ring; 14. Sampling bottle; 141. Gasket; 142. Sealing ring; 143. Plug; 15. Fixing tube; 151. Gasket; 152. Rotary handle; 153. Handle; 154. Protrusion; 155. Sealing plate; 156. Connecting shaft. Detailed Implementation

[0026] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0027] like Figure 1-6As shown, the corrosion-resistant sealed sampling valve includes a sampling valve 10, which consists of a stop valve and a sampling mechanism. The sampling mechanism is connected to the outlet end of the stop valve. The stop valve includes a valve body 11, a connecting flange 111, a valve handle 112, and a valve core 113. The inlet end of the valve body 11 is fixedly connected to the connecting flange 111, and the connection of the pipeline is achieved through the connecting flange 111. The valve handle 112 is threadedly connected to the top of the valve body 11, and the valve core 113 is connected to the bottom end of the valve handle 112. The valve core 113 is fitted and sealed inside the valve body 11. Rotating the valve handle 112 can drive the valve core 113 to move vertically downward, so that the valve core 113 is pressed into the valve body 11 to achieve the sealing of the valve body 11. Rotating the valve handle 112 in the opposite direction can drive the valve core 113 to move upward, so that the valve body 11 is opened, and the medium delivery can be controlled through the stop valve.

[0028] Optionally, the sampling valve 10 may be made of one of the following materials: PE, PP, 304, or ordinary carbon steel.

[0029] A cleaning mechanism is fixedly installed at the bottom of the valve body 11. The cleaning mechanism includes a flushing pipe 12. The bottom end of the flushing pipe 12 is fixedly connected to a connector 121. The connector 121 is connected to a positive pressure pipeline for nitrogen delivery. The top end of the flushing pipe 12 is connected through to the bottom of the valve body 11. The top end of the flushing pipe 12 is provided with a bent connector 122. The bent connector 122 is located at the bottom of the valve body 11. By setting the bent connector 122, the medium inside the valve body 11 will not enter the flushing pipe 12 when it flows. The bottom end of the flushing pipe 12 is provided with a valve. After sampling, there will be some residual medium at the bottom of the valve body 11. At this time, nitrogen is delivered to the inside of the valve body 11 through the flushing pipe 12. By setting the bent connector 122, the nitrogen can blow the residual medium into the sampling mechanism, which can ensure that no residual medium remains in the valve body 11.

[0030] The sampling mechanism includes a sampling tube 13, one end of which is fixedly connected to the valve body 11. The sampling tube 13 and the elbow joint 122 are distributed accordingly. Nitrogen gas blown out from the elbow joint 122 can transport the medium into the sampling tube 13 for delivery.

[0031] The sampling tube 13 has an L-shaped structure. An internal thread is provided on the inner wall of the bottom end of the sampling tube 13, allowing connection between the sampling tube 13 and the sampling bottle 14. An inner protrusion 132 is located on the inner wall of the sampling tube 13 above the internal thread. The sampling bottle 14 is located below the sampling tube 13 and is threaded to the internal thread. A washer 141 is provided at the top edge of the sampling bottle 14, contacting the bottom of the inner protrusion 132. The inner diameter of the bottle opening of the sampling bottle 14 is larger than the inner diameter of the inner protrusion 132. The inner wall of the inner protrusion 132 has an arc-shaped structure. Thus, when the medium is discharged from the sampling tube 13, the inner protrusion 132 ensures that all the medium enters the sampling bottle 14. Any remaining medium on the tube wall drips down the edge of the inner protrusion 132, ensuring that all of it enters the sampling bottle 14 without wasting any medium.

[0032] A breather valve 131 is fixedly connected to the top of the sampling tube 13. The interface of the breather valve 131 is connected to the exhaust gas pipeline on site. The positive pressure generated when the valve is sampling can be discharged into the exhaust gas pipeline to protect the environment. Specifically, the breather valve 131 is an automatic valve used to balance the internal and external air pressure and prevent the sampling tube 13 from being sucked down or burst. Thus, the breather valve 131 can ensure the pressure balance inside the sampling tube 13 and avoid damage to the sampling tube 13.

[0033] The sampling tube 13 has a sealing structure at its bottom end, which includes a sleeve 133 and a pressure ring 134. The sleeve 133 is fixedly connected to the bottom end of the sampling tube 13, and the pressure ring 134 is movably sleeved inside the sleeve 133 and on the surface of the sampling tube 13. A sealing ring 136 is provided at the bottom edge of the pressure ring 134, and the sealing ring 136 contacts the surface of the sampling bottle 14. The sealing ring 136 is sealed to the surface of the sampling tube 13. The bottom edge of the pressure ring 134 is connected by a spring. 135 is connected to the sleeve 133. The spring 135 is sleeved on the surface of the pressure ring 134. In specific operation, before tightening the bottle mouth of the sampling bottle 14 onto the internal thread, first move the pressure ring 134 upward. When the sampling bottle 14 is tightened, the washer 141 is connected to the bottom of the sampling tube 13. Then loosen the pressure ring 134, so that the elasticity of the spring 135 drives the sealing ring 136 at the bottom of the pressure ring 134 to contact the surface of the sampling bottle 14, thereby achieving further sealing at the sampling bottle 14 and ensuring that the medium will not leak.

[0034] A sealing structure is fixedly connected to the top of the sampling tube 13. The sealing structure is located at the bend of the sampling tube 13. The sealing structure includes a fixed tube 15 and a handle 152. The fixed tube 15 is fixedly connected to the top of the sampling tube 13. The handle 152 is threadedly connected to the sampling tube 13. A handle 153 is fixedly connected to the top of the handle 152. A convex shaft is provided in the middle of the handle 153, and the convex shaft is distributed correspondingly to the fixed tube 15. A gasket 151 is fixedly connected to the top of the fixed tube 15. The gasket 151 is distributed correspondingly to the convex shaft. When the handle 152 rotates, it can drive the convex shaft to press against the surface of the gasket 151, thereby achieving an effective seal, preventing dust and other substances from entering, and ensuring that the residual medium in the sampling tube 13 does not evaporate.

[0035] A sealing plate 155 is rotatably connected to the bottom of the handle 152. A connecting shaft 156 is provided in the middle of the sealing plate 155, and the connecting shaft 156 is rotatably connected to the bottom end of the handle 152. The sealing plate 155 is distributed correspondingly to the inner protrusion 132. The diameter of the sealing plate 155 is smaller than the inner diameter of the sampling tube 13. A protrusion 154 is provided at the bottom end of the handle 152. The protrusion 154 is distributed correspondingly to the bottom end of the fixing tube 15. A sealing ring located inside the sampling tube 13 is provided at the bottom end of the fixing tube 15.

[0036] In specific operation, before sampling, first rotate the handle 152 to move the sealing plate 155 upward, causing the sealing plate 155 to separate from the inner protrusion 132. The handle 152 then causes the protrusion 154 to contact the sealing ring at the bottom of the fixed tube 15. At this time, the cooperation between the protrusion 154 and the sealing ring achieves a seal at the fixed tube 15. After opening the valve body 11, the medium is transported to the sampling tube 13 through the shut-off valve, allowing the medium to enter the sampling bottle 14 through the space between the sampling tube 13 and the sealing plate 155. After sampling is completed, due to the joint... 121 is connected to a positive pressure pipeline that delivers nitrogen. The residual medium in the valve body 11 can be blown into the sampling bottle 14 for collection by nitrogen. After the operation is completed, the sampling bottle 14 is unscrewed and sealed. Then, the handle 153 is turned so that the handle 152 drives the sealing plate 155 to press against the inner convex surface 132. At this time, the convex shaft on the handle 153 is pressed against the surface of the gasket 151, thereby achieving a seal at the fixed tube 15 and ensuring that the residual medium in the sampling tube 13 will not leak, which facilitates subsequent sampling operations.

[0037] like Figure 6As shown, the sampling bottle 14 has a sealed structure inside, which is located below the inner protrusion 132. The sealed structure includes a sealing ring 142 and a plug 143. The sealing ring 142 is sealed inside the sampling bottle 14, and the plug 143 is fixed in the middle of the bottle opening of the sampling bottle 14, and the plug 143 is in contact with the inner wall of the sealing ring 142. The plug 143 is connected to the sealing ring 142 through an elastic component. When the sampling bottle 14 is installed, the inner protrusion 132 can abut against the sealing ring 142 and move it downward. After the sealing ring 142 and the plug 143 are separated, sealed sampling can be performed. After sampling, the sampling bottle 14 can be removed so that its top can be automatically sealed to ensure that the medium will not leak.

[0038] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A corrosion-resistant, sealed sampling valve, comprising a sampling valve (10), characterized in that, The sampling valve (10) consists of a stop valve and a sampling mechanism. The sampling mechanism is connected to the outlet end of the stop valve. The stop valve includes a valve body (11), a connecting flange (111), a valve handle (112), and a valve core (113). A cleaning mechanism is fixedly installed at the bottom of the valve body (11). The sampling mechanism includes a sampling tube (13), one end of which is fixedly connected to the valve body (11). The sampling tube (13) has an L-shaped structure. The inner wall of the bottom end of the sampling tube (13) is provided with an internal thread. The inner wall of the sampling tube (13) above the internal thread is provided with an inner protrusion (132). A sampling bottle (14) is provided below the sampling tube (13). A sealing structure is provided at the bottom end of the sampling tube (13). A sealing structure is fixedly connected to the top of the sampling tube (13). The sealing structure is located at the bend of the sampling tube (13). The sealing structure includes a fixed tube (15) and a handle (152). The fixed tube (15) is fixedly connected to the top of the sampling tube (13). A sealing plate (155) is rotatably connected to the bottom of the handle (152). The sealing plate (155) is distributed correspondingly to the inner protrusion (132).

2. The corrosion-resistant, sealed sampling valve as described in claim 1, characterized in that: The inlet end of the valve body (11) is fixedly connected to the connecting flange (111). The top of the valve body (11) is threaded with a valve handle (112). The bottom end of the valve handle (112) is connected with a valve core (113), and the valve core (113) is fitted and sealed inside the valve body (11).

3. The corrosion-resistant, sealed sampling valve as described in claim 1, characterized in that: The cleaning mechanism includes a flushing pipe (12), the bottom end of which is fixedly connected to a connector (121), the connector (121) is connected to a positive pressure pipeline for nitrogen delivery, the top end of which is connected through to the bottom of the valve body (11), the top end of which is provided with a bent connector (122) with a curved structure, and the bent connector (122) is located at the bottom of the valve body (11).

4. The corrosion-resistant, sealed sampling valve as described in claim 1, characterized in that: The sampling bottle (14) is threadedly connected to the internal thread. A washer (141) is provided at the top edge of the sampling bottle (14). The washer (141) contacts the bottom of the inner convex (132). The inner diameter of the bottle mouth of the sampling bottle (14) is smaller than the inner diameter of the inner convex (132). The inner wall of the inner convex (132) is an arc-shaped structure.

5. The corrosion-resistant, sealed sampling valve as described in claim 1, characterized in that: A breathing valve (131) is fixedly connected to the top of the sampling tube (13).

6. The corrosion-resistant, sealed sampling valve as described in claim 1, characterized in that: The sealing structure includes a sleeve (133) and a pressure ring (134). The sleeve (133) is fixedly connected to the bottom end of the sampling tube (13). The pressure ring (134) is movably sleeved inside the sleeve (133) and on the surface of the sampling tube (13). A sealing ring (136) is provided on the bottom edge of the pressure ring (134), and the sealing ring (136) contacts the surface of the sampling bottle (14). The sealing ring (136) is sealed and sleeved on the surface of the sampling tube (13). The bottom edge of the pressure ring (134) is connected to the sleeve (133) through a spring (135), and the spring (135) is sleeved on the surface of the pressure ring (134).

7. The corrosion-resistant, sealed sampling valve as described in claim 1, characterized in that: The handle (152) is threadedly connected to the sampling tube (13). A handle (153) is fixedly connected to the top of the handle (152). A convex shaft is provided in the middle of the handle (153), and the convex shaft is distributed correspondingly to the fixed tube (15). A gasket (151) is fixedly connected to the top of the fixed tube (15), and the gasket (151) is distributed correspondingly to the convex shaft.

8. The corrosion-resistant, sealed sampling valve as described in claim 1, characterized in that: The diameter of the sealing plate (155) is smaller than the inner diameter of the sampling tube (13). The bottom end of the handle (152) is provided with a protrusion (154). The protrusion (154) is distributed correspondingly to the bottom end of the fixing tube (15). The bottom end of the fixing tube (15) is provided with a sealing ring located inside the sampling tube (13).

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