Online closed sampling valve

Abstract

The utility model discloses an online closed sampling valve which comprises a valve body, two sides of the valve body are provided with communicated channels, the middle of the valve body is in threaded connection with a valve rod, the lower end of the valve rod is connected with a cover plate, the lower end of the cover plate is connected with a plug, a groove is formed in the valve body and located below the channels, and a sliding cavity is formed in the groove. A vertically-through sampling pipe is slidably arranged in the sliding cavity, the lower end of the sampling pipe is conical, the cover plate is pressed in the groove, the plug is in threaded connection with the upper portion of the sliding cavity, the upper end of the sampling pipe abuts against the plug, a driving mechanism for driving the sampling pipe to descend is arranged on the lower portion of the valve body, and the lower portion of the valve body is in threaded connection with a sampling bottle. The top surface of the sampling bottle is connected with a sealing film, the sampling tube is positioned above the sealing film, and the sampling tube is driven to descend, so that the sampling tube punctures the sealing film, and the conical part of the sampling tube enters the sampling bottle. The sampling bottle is mounted on the valve body, and the sealing film is in a complete state when sampling is not performed, so that dust and other impurities can be prevented from entering the sampling bottle.

Description

Technical Field

[0001] This utility model relates to the field of sampling valve technology, specifically to an online closed sampling valve. Background Technology

[0002] A sampling valve is a valve used to obtain samples of the medium in pipelines or equipment, and is used in situations where frequent chemical analysis of the medium samples is required. By opening and closing the sampling valve, the desired sample can be removed from the pipeline or container for subsequent analysis, testing, monitoring, and other purposes. Sampling valves can be installed on pipelines or containers and configured according to the type and location of the sample to be collected, ensuring that the collected samples are representative and accurate.

[0003] However, the current sampling valve has the following problems: (1) After the sampling bottle is installed on the valve body, the sampling bottle and the sampling valve are connected. After being idle for a long time, dust and other impurities are easy to enter the sampling bottle, affecting the sampling effect; (2) After the sampling bottle is installed on the valve body, its lower end is suspended. After being unused for a long time, it is easy to fall off. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides an online closed sampling valve to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An online sealed sampling valve includes a valve body with communicating channels on both sides. A valve stem is threadedly connected to the middle of the valve body, with a first handle connected to the upper end of the valve stem and a cover plate connected to the lower end of the valve stem. A plug is connected to the lower end of the cover plate. A groove is provided below the channels in the valve body, and a sliding cavity is provided in the groove. A sampling tube that runs vertically through the groove is slidably arranged in the sliding cavity. The lower end of the sampling tube is tapered. The cover plate is pressed into the groove, and the plug is threadedly connected to the upper part of the sliding cavity. The upper end of the sampling tube abuts against the plug. A driving mechanism for driving the sampling tube to descend is provided at the lower part of the valve body. A sampling bottle is threadedly connected to the lower part of the valve body, and a sealing membrane is connected to the top surface of the sampling bottle. The sampling tube is located above the sealing membrane. By driving the sampling tube to descend, the sampling tube pierces the sealing membrane and the tapered part of the sampling tube enters the sampling bottle.

[0007] Preferably, the lower part of the valve body is provided with a first driving cavity around the slide cavity, and the upper part of the first driving cavity is provided with a second driving cavity. The driving mechanism includes a lead screw rotatably connected to the first driving cavity, a guide rod connected to the first driving cavity, a transmission block connected to one side of the sampling tube, and a slider connected to the other side of the sampling tube. The transmission block is threadedly connected to the lead screw, and the slider is slidably connected to the guide rod. The upper end of the lead screw extends into the second driving cavity. The driving mechanism also includes a first bevel gear connected to the upper end of the lead screw, a transmission rod rotatably connected to the valve body, a second handle connected to the outer end of the transmission rod, and a second bevel gear connected to the inner end of the transmission rod. The first bevel gear and the second bevel gear are located in the second driving cavity and mesh with each other.

[0008] In the above technical solution, when sampling is required, the second handle is turned to drive the transmission rod to rotate. Through the cooperation of the first bevel gear and the second bevel gear, the lead screw is driven to rotate. During the rotation of the lead screw, the transmission block and the slider move downward. The transmission block and the slider drive the sampling tube to descend, thereby piercing the sealing membrane through the conical end of the sampling tube and allowing the sampling tube to enter the sampling bottle for sampling.

[0009] Preferably, the bottom surface of the cover plate is provided with a first sealing ring, the outer wall of the plug is provided with a second sealing ring, and the outer wall of the upper end of the sampling tube is provided with a third sealing ring.

[0010] The above technical solution, when the cover plate is pressed into the groove and the plug is threaded into the sliding cavity, can prevent the medium from penetrating into the sliding cavity and prevent the medium from flowing out through the action of the first and second sealing rings. Through the action of the third sealing ring, it can prevent the medium from overflowing from the connection between the sampling tube and the sliding cavity.

[0011] Preferably, a fourth sealing ring is provided on the outer wall at the connection between the valve stem and the valve body.

[0012] The above technical solution, through the function of the fourth sealing ring, can prevent the medium from leaking out from the connection between the valve stem and the valve body.

[0013] Preferably, the lower part of the valve body is further connected to a support mechanism for supporting the sampling bottle. The support mechanism includes a cover connected to the lower part of the valve body and a support plate hinged to the lower end of the cover. One side of the support plate is connected to the cover by screws, and the bottom surface of the sampling bottle rests on the support plate.

[0014] The above technical solution involves installing the sampling bottle on the valve body, closing the support plate, and fixing the support plate to the cover with screws. At this time, the sampling bottle is supported by the support plate, and the sampling bottle is located inside the cover, which can protect the sampling bottle and prevent it from falling or being damaged.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The sampling bottle is installed on the valve body. When not sampling, the sealing membrane is intact, which can prevent dust and other impurities from entering the sampling bottle. When sampling is required, rotate the valve stem to make the plug leave the slide cavity. The medium will enter the sampling tube through the channel. Then, the driving mechanism controls the sampling tube to descend and puncture the sealing membrane, so that the medium can enter the sampling bottle and achieve sampling.

[0017] (2) The sampling bottle is installed on the valve body and placed on the support plate. The support plate supports the sampling bottle, and the sampling bottle is located inside the cover, which can protect the sampling bottle and prevent it from falling or being damaged. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0021] Figure 4 This is a schematic diagram of the cover plate, plug, and sampling tube;

[0022] Figure 5 This is a schematic diagram of the sampling process;

[0023] In the diagram: 1-valve body, 2-channel, 3-valve stem, 4-first handle, 5-cover plate, 6-plug, 7-groove, 8-sliding cavity, 9-sampling tube, 10-sampling bottle, 11-sealing membrane, 12-first driving cavity, 13-second driving cavity, 14-lead screw, 15-guide rod, 16-transmission block, 17-slider, 18-first bevel gear, 19-transmission rod, 20-second handle, 21-second bevel gear, 22-first sealing ring, 23-second sealing ring, 24-third sealing ring, 25-fourth sealing ring, 26-cover, 27-support plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figures 1-5An online sealed sampling valve includes a valve body 1, with connecting channels 2 on both sides of the valve body 1. A valve stem 3 is threadedly connected to the middle of the valve body 1. A fourth sealing ring 25 is provided on the outer wall of the connection between the valve stem 3 and the valve body. The fourth sealing ring 25 can prevent the medium from leaking out from the connection between the valve stem and the valve body. A first handle 4 is connected to the upper end of the valve stem 3, and a cover plate 5 is connected to the lower end of the valve stem 3. A plug 6 is connected to the lower end of the cover plate 5. A groove 7 is provided in the valve body 1 below the channel. A sliding cavity 8 is provided in the groove 7. A sampling tube 9 that runs vertically through the sliding cavity 8 is slidably arranged in the sliding cavity 8. The lower end of the sampling tube 9 is conical. The cover plate 5 is pressed into the groove 7. The inner wall of the upper part of the sliding cavity 8 is provided with internal threads. The plug 6 is threadedly connected to the upper part of the sliding cavity 8. The upper end of the sampling tube 9 abuts against the plug 6. Rotating the first handle 4 causes the valve stem 3 to rotate, which presses the cover plate 5 tightly into the groove 7 and threadedly connects the plug 6 into the slide cavity 8, thereby sealing the slide cavity 8 and blocking the sampling tube 9. Rotating the first handle 4 in the opposite direction causes the valve stem 3 to rotate in the opposite direction, which allows the cover plate 5 to leave the groove 7 and the plug 6 to leave the slide cavity 8, so that sampling can be performed.

[0027] In addition, the bottom surface of the cover plate 5 is provided with a first sealing ring 22, the outer wall of the plug 6 is provided with a second sealing ring 23, and the outer wall of the upper end of the sampling tube 9 is provided with a third sealing ring 24. When the cover plate 5 is pressed into the groove 7 and the plug 6 is threaded into the sliding cavity 8, the first sealing ring 22 and the second sealing ring 23 can prevent the medium from penetrating into the sliding cavity 8 and prevent the medium from flowing out. The third sealing ring 24 can prevent the medium from overflowing from the connection between the sampling tube 9 and the sliding cavity 8.

[0028] The lower part of the valve body 1 is threadedly connected to a sampling bottle 10, and a sealing membrane 11 is connected to the top surface of the sampling bottle 10. The sampling tube 9 is located above the sealing membrane 11. The lower part of the valve body 1 is provided with a driving mechanism for driving the sampling tube 9 to descend. By driving the sampling tube 9 to descend, the sampling tube 9 pierces the sealing membrane 11 and the conical part of the sampling tube 9 enters the sampling bottle 10. Specifically, the lower part of the valve body 1 is provided with a first driving cavity 12 located around the slide cavity 8, and the upper part of the first driving cavity 12 is provided with a second driving cavity 13. The driving mechanism includes a lead screw 14 rotatably connected to the first driving cavity, a guide rod 15 connected to the first driving cavity, a transmission block 16 connected to one side of the sampling tube, and a slider 17 connected to the other side of the sampling tube. The transmission block 16 is threadedly connected to the lead screw 14, and the slider 17 is slidably connected to the guide rod 15. The upper end of the lead screw 14 extends into the second driving cavity 13. The driving mechanism also includes a first bevel gear 18 connected to the upper end of the lead screw, a transmission rod 19 rotatably connected to the valve body, a second handle 20 connected to the outer end of the transmission rod, and a second bevel gear 21 connected to the inner end of the transmission rod. The first bevel gear 18 and the second bevel gear 21 are located in the second driving cavity 13, and the first bevel gear 18 and the second bevel gear 21 mesh. When sampling is required, the second handle 20 is turned, which drives the transmission rod 19 to rotate. Through the cooperation of the first bevel gear 18 and the second bevel gear 21, the lead screw 14 is driven to rotate. During the rotation of the lead screw 14, the transmission block 16 and the slider 17 move downward. The transmission block 16 and the slider 17 drive the sampling tube 9 to descend, thereby piercing the sealing membrane 11 through the conical end of the sampling tube 9, allowing the sampling tube 9 to enter the sampling bottle 10 and start sampling.

[0029] The working principle of this embodiment is as follows: The sampling bottle 10 is installed on the valve body 1. When not sampling, the sealing membrane is intact, preventing dust and other impurities from entering the sampling bottle 11. When sampling is required, the valve stem 3 is rotated, causing the plug 6 to leave the sliding cavity 8. The medium then enters the sampling tube 9 through the channel 2. Then, the second handle 20 is rotated, driving the transmission rod 19 to rotate. Through the cooperation of the first bevel gear 18 and the second bevel gear 21, the lead screw 14 is driven to rotate. During the rotation of the lead screw 14, the transmission block 16 and the slider 17 move downward. The transmission block 16 and the slider 17 drive the sampling tube 9 to descend, thereby piercing the sealing membrane 11 through the conical end of the sampling tube 9, allowing the sampling tube 9 to enter the sampling bottle 10 and begin sampling.

[0030] Example 2

[0031] Based on Embodiment 1, the lower part of the valve body 1 is further connected to a support mechanism for supporting the sampling bottle 10. The support mechanism includes a cover 26 connected to the lower part of the valve body and a support plate 27 hinged to the lower end of the cover. One side of the support plate 27 is connected to the cover 26 by screws, and the bottom surface of the sampling bottle 10 rests on the support plate 27. The sampling bottle 10 is mounted on the valve body 1 and placed on the support plate 27. The support plate 27 supports the sampling bottle 10, and the sampling bottle 10 is located inside the cover 26, which protects the sampling bottle and prevents it from falling or being damaged.

[0032] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An in-line, closed-sampling valve characterized by: The utility model provides a valve body (1) is provided with the passage (2) of intercommunication on both sides, the middle part of valve body (1) is connected with valve stem (3) through screw thread, the upper end of valve stem (3) is connected with first handle (4), the lower end of valve stem (3) is connected with cover plate (5), the lower end of cover plate (5) is connected with plug (6), the recess (7) of being located in the passage below in valve body (1) is equipped with slide cavity (8), the slide cavity (8) is equipped with the sampling tube (9) of going up and down through -going in, the lower end of sampling tube (9) is tapered, cover plate (5) is pressed in recess (7), and plug (6) is connected with the upper portion of slide cavity (8) through screw thread, the upper end of sampling tube (9) is abutted on plug (6), the lower part of valve body (1) is equipped with the drive mechanism of driving sampling tube (9) to drop, the lower part of valve body (1) is connected with sampling bottle (10) through screw thread, the top surface of sampling bottle (10) is connected with sealing membrane (11), sampling tube (9) is located above sealing membrane (11), by driving sampling tube (9) to drop, makes sampling tube (9) puncture sealing membrane (11), and makes the tapered portion of sampling tube (9) enter sampling bottle (10).

2. An in-line, closed-sampling valve according to claim 1, characterized in that: The utility model discloses a valve body (1) lower part is located in the periphery of slide cavity (8) and is equipped with first drive cavity (12), and the upper portion of first drive cavity (12) is equipped with second drive cavity (13), the drive mechanism includes the screw rod (14) of rotation connection in first drive cavity, the guide rod (15) of connection in first drive cavity, the transmission block (16) of connection on one side of sampling tube, the sliding block (17) of connection on the other side of sampling tube, transmission block (16) is connected with screw rod (14) through screw thread, sliding block (17) is connected with guide rod (15) slidingly, and the upper end of screw rod (14) extends to second drive cavity (13) in, the drive mechanism still includes the first conical gear (18) of connection on the upper end of screw rod, the transmission rod (19) of rotation connection on valve body, the second handle (20) of connection on the outer end of transmission rod, the second conical gear (21) of connection on the inner end of transmission rod, and first conical gear (18) and second conical gear (21) are located in second drive cavity (13), and first conical gear (18) and second conical gear (21) are engaged.

3. An in-line, closed-sampling valve according to claim 2, characterized in that: The bottom of cover plate (5) is equipped with first sealing ring (22), the outer wall of plug (6) is equipped with second sealing ring (23), and the outer wall of the upper end of sampling tube (9) is equipped with third sealing ring (24).

4. An in-line, closed-sampling valve according to claim 3, characterized in that: The outer wall of the valve stem (3) and valve body connection place is equipped with fourth sealing ring (25).

5. An in-line, closed-sampling valve according to claim 4, characterized in that: The lower part of the valve body (1) is further connected with a supporting mechanism for supporting the sampling bottle (10).

6. An in-line, closed-sampling valve according to claim 5, characterized in that: The supporting mechanism includes a cover (26) connected to the lower part of the valve body, a support plate (27) hingedly connected to the lower end of the cover, one side of the support plate (27) being connected to the cover (26) by a screw, and the bottom surface of the sampling bottle (10) being placed on the support plate (27).

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