Plunger sampling valve

Abstract

The utility model provides a plunger sampling valve, which relates to the technical field of sampling valves, and comprises a valve body, an inner cavity is arranged in the valve body, an inlet end is arranged on the valve body corresponding to the inlet end of the inner cavity, an outlet end is arranged on the valve body corresponding to the outlet end of the inner cavity, a rubber head is arranged in the inner cavity, and the rubber head is connected with the inner cavity. And the upper rubber head is embedded on the valve ball. By arranging the second through pipe in the valve rod and arranging the first through opening and the second through opening in the bottom, the valve rod can be used as a multi-through pipe, all the formed inner cavities and through holes can be connected with different functional structures, and the flowing direction of sampling media can be controlled by moving the positions of the through holes. According to the utility model, by combining the designed storage device, the quantitative sampling of the medium can be realized, the sampling amount can be conveniently controlled by a user, and the sampling of the medium by the user is greatly facilitated without depending on external measuring equipment and user experience.

Description

Technical Field

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

[0002] The plunger sampling valve is a specially designed valve used to obtain medium samples from pipelines or equipment. The main components of the plunger sampling valve include the valve body, plunger, valve stem, seal and operating handle. Its working principle is to drive the valve stem and plunger to move up and down inside the valve body by rotating the handwheel, thereby controlling the opening and closing of the valve. The plunger and the sealing ring are fitted with an interference fit. By adjusting the flange bolts in the gland, the sealing ring is compressed to generate lateral force, which is sealed with the hole surface of the valve body and the outer circle of the plunger to ensure the sealing of the valve. This type of sampling valve is particularly suitable for occasions such as crystallization reactors because it can handle materials with high viscosity without causing clogging. The sealing temperature of the plunger sampling valve can reach a very high level. According to different installation requirements, different lengths of exposed plungers can be designed to ensure that the sampling port of the container is not blocked. In general, the plunger sampling valve is an important industrial product that plays a key role in the chemical and pharmaceutical industries to help detect and ensure product quality.

[0003] In the prior art, the plunger sampling valve generally allows the medium to flow out after it is opened, and the amount of sampling depends on the container with a measuring structure used by the user, or the sampling is performed based on the user's feeling. This method relies too heavily on external objects and the user's personal experience, which can easily lead to excessive or insufficient sampling. When the sampling is excessive, more time or cost is required to process the medium after the experiment is completed, and insufficient sampling requires re-sampling. In any case, there are certain inconveniences and improvements need to be made. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art. By opening a through pipe two inside the valve stem and opening a through port one and a through port two at the bottom, the valve stem can be used as a multi-way pipe, each of the opened inner cavities and through holes can be connected to different functional structures, and the direction of the sampling medium can be controlled by moving the position of the through hole, thereby providing a plunger sampling valve.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a plunger sampling valve, comprising a valve body, an inner cavity is provided inside the valve body, an inlet end is provided on the valve body corresponding to the inlet end of the inner cavity, an outlet end is provided on the valve body corresponding to the outlet end of the inner cavity, a rubber head is provided inside the inner cavity, and the upper rubber head is embedded and installed on the valve ball, the valve ball is fixedly connected to one end of the valve stem, a through port 1 and a through port 2 are provided on the end of the valve stem close to the valve ball, a through pipe 1 is opened inside the valve body corresponding to the through port 1, a discharge pipe is fixedly installed on the valve body corresponding to the end of the through pipe 1 away from the through port 1, a through pipe 2 is provided inside the valve stem, an external thread is provided on the outer side of the end of the valve stem away from the valve ball, a handle is threadedly connected to the external thread, a reservoir is threadedly connected to one end of the valve stem where the external thread is located, the reservoir is communicated with the through pipe 2, the valve stem is arranged inside the end cap, the end cap and the valve body are sealed, an internal thread is provided on the inner wall of the upper port of the end cap, and the valve stem is threadedly connected to the internal thread.

[0006] As a preferred embodiment, the storage device includes a storage tube, a connector is provided at the lower end of the storage tube, the connector is sealedly connected to the through pipe 2, a top cover is sealedly connected to the upper end of the storage tube, a connecting tube is sealedly connected to the top cover, a lower gasket and an upper gasket are provided in the connecting tube, and a rubber pad and a through-hole disk are provided between the lower gasket and the upper gasket.

[0007] As a preferred embodiment, a middle through hole is provided at the center of the rubber pad, and a through hole array is provided between the middle through hole and the upper gasket, and the through hole array is opened through the through hole disk.

[0008] As a preferred embodiment, a piston is provided inside the storage tube, a sealing ring is embedded at the outer edge of the piston, and the sealing ring slides between the storage tube.

[0009] As a preferred implementation, the lower gasket and the upper gasket are both threadedly connected to the connecting pipe.

[0010] As a preferred implementation, a sealing cover is installed at the upper end of the sealing head, and the valve stem passes through the sealing cover.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] The utility model opens two through-tubes inside the valve stem and opens one through-port and two through-ports at the bottom, so that the valve stem can be used as a multi-way tube. Each of the opened inner cavities and through-holes can be connected to different functional structures, and the direction of the sampling medium can be controlled by moving the position of the through-hole. Combined with the designed storage device, the utility model can perform quantitative sampling of the medium, which is convenient for the user to control the sampling amount, and does not rely on external measuring equipment and user experience, which greatly facilitates the user to sample the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic structural diagram of a plunger sampling valve provided by the utility model.

[0014] Figure 2 A schematic diagram of a reservoir of a plunger sampling valve provided by the utility model.

[0015] Figure 3 A half-section view of a reservoir of a plunger sampling valve provided by the utility model.

[0016] Figure 4 A schematic diagram of a one-way airtight structure of a plunger sampling valve provided by the utility model.

[0017] Figure 5 The utility model provides a schematic diagram of the opening of a plunger sampling valve.

[0018] Legend:

[0019] 1. Valve body; 2. Inner cavity; 3. Inlet end; 4. Outlet end; 5. Rubber head; 6. Valve ball; 7. Valve stem; 8. Port 1; 9. Through pipe 1; 10. Discharge pipe; 11. Port 2; 12. End cap; 13. Internal thread; 14. Cover; 15. Through pipe 2; 16. Reservoir; 17. External thread; 18. Handle;

[0020] a1, storage tube; a2, connector; a3, top cover; a4, connecting tube; a5, lower gasket; a6, upper gasket; a7, rubber pad; a8, middle through hole; a9, through hole disk; a10, through hole array; a11, piston; a12, sealing 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] Example 1

[0023] like Figure 1-5 As shown, the utility model provides a technical solution: a plunger sampling valve, including a valve body 1, an inner cavity 2 is provided inside the valve body 1, an inlet end 3 is provided on the valve body 1 corresponding to the inlet end of the inner cavity 2, an outlet end 4 is provided on the valve body 1 corresponding to the outlet end of the inner cavity 2, a rubber head 5 is provided inside the inner cavity 2, the upper rubber head 5 is embedded and installed on the valve ball 6, the valve ball 6 is fixedly connected to one end of the valve stem 7, a through port 1 8 and a through port 2 11 are provided on the end of the valve stem 7 close to the valve ball 6, a through pipe 1 9 is opened inside the valve body 1 corresponding to the through port 1 8, and the end of the through pipe 1 9 away from the through port 1 8 corresponds to the valve body 1 A discharge pipe 10 is fixedly installed on it, a through pipe 15 is provided inside the valve stem 7, an external thread 17 is provided on the outer side of one end of the valve stem 7 away from the valve ball 6, a handle 18 is threadedly connected to the external thread 17, a reservoir 16 is threadedly connected to one end of the valve stem 7 where the external thread 17 is located, the reservoir 16 is communicated with the through pipe 15, the valve stem 7 is penetrated inside the end cap 12, the end cap 12 and the valve body 1 are sealed, an internal thread 13 is provided on the inner wall of the upper port of the end cap 12, the valve stem 7 is threadedly connected to the internal thread 13, a cover 14 is installed on the upper end of the end cap 12, and the valve stem 7 penetrates the cover 14.

[0024] In this embodiment, by setting the positions of the port 18 and the through pipe 19 to correspond to each other, when the utility model is closed, the interior of the reservoir 16 can be connected to the discharge pipe 10 through the through pipe 2 15, the port 18 and the through pipe 19, so that the sampled medium in the reservoir 16 is released through the discharge pipe 10. When the utility model is opened, the port 18 and the through pipe 19 are misaligned, and the rubber head 5 and the valve ball 6 separate the two ends of the inner cavity 2. The medium in the inner cavity 2 enters the reservoir 16 through the port 18 and the port 2 11 through the through pipe 2 15, and then the valve is closed to complete the quantitative sampling.

[0025] The movement of the valve stem 7 is completed through the threaded connection between the valve stem 7 and the internal thread 13, combined with the connection between the handle 18 and the valve stem 7. When the valve stem 7 needs to be rotated, it can be completed by simply rotating the handle 18.

[0026] Example 1

[0027] like Figure 1-5 As shown, the storage 16 includes a storage tube a1, a connector a2 is provided at the lower end of the storage tube a1, the connector a2 is sealed to the through pipe 15, a top cover a3 is sealed to the upper end of the storage tube a1, a connecting tube a4 is sealed inside the top cover a3, a lower gasket a5 and an upper gasket a6 are provided inside the connecting tube a4, a rubber pad a7 and a through-hole plate a9 are provided between the lower gasket a5 and the upper gasket a6;

[0028] A middle through hole a8 is provided at the center of the rubber pad a7, and a through hole array a10 is provided between the middle through hole a8 and the upper gasket a6. The through hole array a10 is provided through the through hole plate a9.

[0029] Furthermore, a piston a11 is provided inside the storage tube a1, and a sealing ring a12 is embedded at the outer edge of the piston a11, and the sealing ring a12 slides between the storage tube a1;

[0030] Furthermore, both the lower gasket a5 and the upper gasket a6 are threadedly connected to the connecting pipe a4.

[0031] In this embodiment, when the medium enters the storage tube a1, it contacts the piston a11 and pushes up the piston a11 under the pressure of the medium itself. At this time, the air inside the cavity on the other side of the piston a11 is squeezed and first enters the gap between the through-hole disk a9 and the rubber pad a7 through the through-hole array a10, slightly pushing up the rubber pad a7, and then the air is discharged through the middle through-hole a8, so that the medium can smoothly push up the piston a11 and move it to the top of the storage tube a1, and the sampling valve is closed at this point;

[0032] After the valve is closed, the rubber pad a7 blocks the through hole array a10, and the rubber pad a7 itself is pressed on the through hole array a10 under the action of atmospheric pressure, so that air cannot enter through the middle through hole a8, thereby forming a one-way airtight effect to prevent medium leakage;

[0033] Furthermore, when the medium is discharged, the user only needs to take out the connecting tube a4. At this time, the one-way airtight structure composed of the rubber pad a7 and the through-hole disk a9 will also be removed, so the air can enter the storage tube a1 through the top cover a3. Under the action of the medium itself and the self-gravity of the piston a11, the medium flows out through the through tube 2 15 and the through tube 1 9. After the medium is discharged, the connecting tube a4 can be reset.

[0034] Working principle:

[0035] like Figure 1-5 As shown, when the utility model is used, the valve stem 7 is first driven to rotate by rotating the handle 18, so that the valve stem 7 drives the valve ball 6 and the rubber head 5 to descend until the inner cavity 2 is isolated. At this time, when the through pipe 15 is connected with the inner cavity 2 through the through port 1 8 and the through port 2 11, the medium will enter the through pipe 15 through the through port 1 8 and the through port 2 11, and enter the storage tube a1 under the action of its own pressure, and then the medium will push the piston a11 to move upward under the action of its own pressure. At this time, the air on the other side of the piston a11 will be discharged through the through hole array a10 and the middle through hole a8 under the action of pressure until the piston a11 is pushed to the top of the storage tube a1 by the medium, that is, the sampling of the utility model itself is completed;

[0036] Then the user turns the handle 18 to make the valve stem 7 drive the rubber head 5 and the valve ball 6 to reset, and then removes the connecting tube a4 to release the one-way airtightness inside the storage tube a1. At this time, due to the gravity of the medium itself and the gravity of the piston a11, the air between the piston a11 and the top cover a3 becomes larger again. Under the negative pressure of the space, the air enters the space between the piston a11 and the top cover a3 through the top cover a3 to prevent the negative pressure from affecting the sinking of the piston a11. In this process, the medium will be discharged from the discharge pipe 10 through the through pipe 2 15 and the through pipe 1 9 until the piston a11 sinks to the bottom of the storage tube a1, and the sampling is completed. The user can then reset the connecting tube a4 again.

[0037] When the capacity of the storage tube a1 is smaller than the sampling requirement of the user, more medium can be sampled by multiple samplings. Since the maximum volume of the storage tube a1 is a fixed value, it is also very easy for the user to calculate the number of samplings, thereby reducing waste.

[0038] In addition, the overall specifications of the storage container 16 can also be determined according to the long-term needs of the site of use, making it more convenient for the user to perform medium sampling operations.

[0039] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A plunger sampling valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with an inner cavity (2) inside, an inlet end (3) is provided on the valve body (1) corresponding to the inlet end of the inner cavity (2), an outlet end (4) is provided on the valve body (1) corresponding to the outlet end of the inner cavity (2), a rubber head (5) is provided inside the inner cavity (2), the upper rubber head (5) is mounted on the valve ball (6), the valve ball (6) is fixedly connected to one end of the valve stem (7), the end of the valve stem (7) close to the valve ball (6) is provided with a through port (8) and a through port (11), the valve body (1) corresponding to the through port (8) is provided with a through pipe (9), the end of the through pipe (9) away from the through port (8) corresponds to the valve body (1) A discharge pipe (10) is fixedly installed on the valve stem (7), a second through pipe (15) is arranged inside the valve stem (7), an outer side of one end of the valve stem (7) away from the valve ball (6) is provided with an external thread (17), a handle (18) is threadedly connected to the external thread (17), a reservoir (16) is threadedly connected to one end of the valve stem (7) where the external thread (17) is located, the reservoir (16) is communicated with the second through pipe (15), the valve stem (7) is arranged through the inside of the sealing head (12), the sealing head (12) and the valve body (1) are sealed, the inner wall of the upper port of the sealing head (12) is provided with an internal thread (13), and the valve stem (7) and the internal thread (13) are threadedly connected.

2. A plunger sampling valve according to claim 1, characterized in that: The storage container (16) comprises a storage tube (a1), a connector (a2) is provided at the lower end of the storage tube (a1), the connector (a2) is sealedly connected to the through pipe 2 (15), a top cover (a3) ​​is sealedly connected to the upper end of the storage tube (a1), a connecting tube (a4) is sealedly connected inside the top cover (a3), a lower gasket (a5) and an upper gasket (a6) are provided inside the connecting tube (a4), a rubber pad (a7) and a through-hole disk (a9) are provided between the lower gasket (a5) and the upper gasket (a6).

3. A plunger sampling valve according to claim 2, characterized in that: A middle through hole (a8) is provided at the center of the rubber pad (a7), and a through hole array (a10) is provided between the middle through hole (a8) and the upper gasket (a6), and the through hole array (a10) is penetrated and opened on the through hole plate (a9).

4. A plunger sampling valve according to claim 2, characterized in that: A piston (a11) is provided inside the storage tube (a1), and a sealing ring (a12) is embedded at the outer edge of the piston (a11), and the sealing ring (a12) slides between the storage tube (a1).

5. A plunger sampling valve according to claim 2, characterized in that: The lower gasket (a5) and the upper gasket (a6) are both threadedly connected to the connecting pipe (a4).

6. A plunger sampling valve according to claim 1, characterized in that: A sealing cover (14) is installed at the upper end of the sealing head (12), and the valve stem (7) is arranged to pass through the sealing cover (14).

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