CN109538774B

CN109538774B - Sampling valve

Info

Publication number: CN109538774B
Application number: CN201811566956.2A
Authority: CN
Inventors: 吴晨
Original assignee: Az Armaturen Taicang Co ltd
Current assignee: Az Armaturen Taicang Co ltd
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2024-04-02
Anticipated expiration: 2038-12-19
Also published as: CN109538774A

Abstract

The invention discloses a sampling valve, which is connected with a vertical pipe and is used for sampling particles in the vertical pipe, wherein the sampling valve comprises: the valve body is provided with a cavity, and one end of the valve body is connected with the vertical pipe; the valve cover is arranged at the other end of the valve body; the sampling rod is at least partially positioned in the cavity, at least partially penetrates through the valve cover and is positioned outside the valve body; the first sealing structure is fixedly connected to one end of the sampling rod, which is far away from the valve cover; the second sealing structure is fixedly connected with the valve cover; wherein a sampling rod located in the cavity is operable to move from the cavity to the riser for sampling. The sampling valve disclosed by the invention can maintain a sealing state before, during and after sampling, and the sampling medium is completely isolated from the outside, thus being representative.

Description

Sampling valve

Technical Field

The present invention relates to the field of machinery, and more particularly to sampling valves.

Background

At present, the industries such as medicines, foods and cosmetics have great demands on riser sampling, and a sampling mode of freely falling particles is generally adopted, but the sampler adopted in the current market is not specially suitable for sampling vertical pipelines which are freely blanking and have pressure, so the problems of complex operation, leakage of the particles, blanking blocking, insufficient cleanliness of the sampled materials, high price and the like exist.

Disclosure of Invention

In view of this, in order to overcome at least one aspect of the above-mentioned problems, an embodiment of the present invention proposes a sampling valve connected to a riser for sampling particles in the riser, wherein the sampling valve comprises:

the valve body is provided with a cavity, and one end of the valve body is connected with the vertical pipe;

the valve cover is arranged at the other end of the valve body;

the sampling rod is at least partially positioned in the cavity, at least partially penetrates through the valve cover and is positioned outside the valve body;

the first sealing structure is fixedly connected to one end of the sampling rod, which is far away from the valve cover;

the second sealing structure is fixedly connected with the valve cover;

wherein a sampling rod located in the cavity is operable to move from the cavity to the riser for sampling.

In some embodiments, the second seal structure is configured to axially seal such that the cavity remains sealed while the sampling rod is sampling.

In some embodiments, the first seal structure comprises a gasket coupled to the sampling rod and a seal baffle coupled to the gasket;

wherein the gasket is configured as a face seal such that the cavity remains sealed before and/or after sampling by the sampling rod.

In some embodiments, the sampling valve further comprises:

the connecting piece is used for connecting the valve body and the vertical pipe.

Wherein the connector comprises a loose flange for connecting the riser to the cavity.

In some embodiments, the radial dimension of the sampling rod located in the cavity is smaller than the radial dimension of the gasket and the sealing barrier such that the gasket and the sealing barrier are always located in the loose flange before and/or after sampling.

In some embodiments, the sampling valve further comprises: and a funnel in communication with the cavity.

In some embodiments, a sampling rod located in the cavity is provided with a sampling slot at a first predetermined position, the sampling slot being operable to change the slot direction;

when the sampling groove is used for sampling, the sampling rod is rotated to enable the notch to be upward; when the sampling slot finishes sampling, the sampling rod is rotated to enable the notch to be downward so that particles in the sampling slot fall into the funnel.

In some embodiments, the sampling valve further comprises a handle fixedly disposed at a second preset position of the sampling rod outside the valve body.

In some embodiments, the orientation of the handle is the same as the orientation of the notch.

In some embodiments, the end of the sampling rod outside the valve body is provided with an indicating arrow, the pointing direction of which is the same as the orientation of the notch.

The invention has one of the following beneficial technical effects: the sampling valve disclosed by the invention can be used for sampling a vertical pipeline with free blanking and pressure, can maintain a sealing state before sampling, during sampling and after sampling, and is characterized in that a sampling medium is completely isolated from the outside.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other embodiments may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic longitudinal cross-sectional view of a sampling valve according to the present invention;

fig. 2 is a right side view of the sampling valve provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that, in the embodiments of the present invention, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and the following embodiments are not described one by one.

According to an aspect of the embodiment of the present invention, as shown in fig. 1, there is provided a sampling valve 100, wherein the sampling valve 100 can be connected with a riser pipe for free blanking and pressure, and can maintain a sealed state before, during and after sampling, and the sampling medium is completely isolated from the outside, typically.

In some embodiments, as shown in fig. 1, the sampling valve 100 provided by the present invention may include a valve body 1, a valve cover 2, a sampling rod 3, a first sealing structure 4, and a second sealing structure 5.

Wherein the valve body 1 is shown in fig. 1 with a cavity 101 and with one end connected to a riser. This allows at least part of the sampling wand 3 to be positioned in the cavity 101 before and/or after sampling, and the sampling wand 3 positioned in the cavity 101 can be operatively moved from the cavity 101 to the riser for sampling. Furthermore, in order to keep the sampling valve 100 in a sealed state before and/or after sampling, i.e. in order to prevent the pressure in the riser pipe and the particulate medium from escaping, a first sealing structure 4 may be provided at the end of the sampling rod 3 remote from the valve cap 2 and fixedly connected to the sampling rod 3 by means of bolts 43.

In some embodiments, the first sealing structure 4 shown in fig. 1 may comprise a sealing gasket 41 connected to the sampling rod 3 and a sealing barrier 42 connected to the sealing gasket 41, i.e. the sealing gasket 41 is located between the sealing barrier 42 and the sampling rod 3. As shown in fig. 1, bolts 43 may pass through the sealing barrier 42, the packing 41, and the sampling rod 3 in order to enable the sealing barrier 42 and the packing 41 to be fixedly connected to the sampling rod 3. Moreover, since the gasket 41 is fixedly connected to the sampling rod 3, it can move along with the movement of the sampling rod 3, so that it is provided as a face seal, so that the cavity 101 remains sealed before and/or after sampling, isolated from the riser, and the pressure in the riser and the particulate medium are not leaked.

In some embodiments, the sampling valve 100 shown in fig. 1 may further comprise a connection 6 for enabling connection of a riser to the valve body 1. Furthermore, in order to enable the sampling rod 3 located in the cavity 101 to be moved to the riser for sampling, the connection piece 6 may be provided with a loose flange 61 for enabling the riser to be connected to the cavity 101.

In some embodiments, the connector 6 shown in fig. 1 may be connected to the riser by welding, while the loose flange 61 may be connected to the body of the connector 6 by means of a second bolt 63 and nut 64 mating.

In some embodiments, the connector 6 shown in fig. 1 may also include a metal wrap gasket 62 to cushion the pressure between the body of the connector 6 and the valve body 1.

In some embodiments, the gasket 41 and the sealing flap 42 shown in fig. 1 may each have a radial dimension that is greater than the radial dimension of the sampling rod 3 located in the cavity 101, such that the gasket 41 and the sealing flap 42 may be located in the loose flange 61 before and/or after sampling without entering the cavity 101 of the valve body 1.

In some embodiments, in order to facilitate sampling when the sampling rod 3 enters the riser, the sampling slot 31 may be provided at a preset position on the sampling rod 3, and the preset position may be determined according to the length of the sampling slot 31 and the width of the riser, so long as the sampling slot 31 is guaranteed to completely enter the riser for sampling. And the depth of the sampling groove 31 may be determined according to the sampling amount to achieve quantitative sampling.

In some embodiments, the sampling valve 100 shown in fig. 1 may also include a funnel 7. As shown in fig. 1, the funnel 7 may be in communication with the cavity 101, such that particles in the sampling slot 31 may be removed by changing the orientation of the slot opening of the sampling slot 31.

Specifically, during sampling in sampling slot 31, the slot can be turned up by rotating sampling rod 3 to receive free-falling particles in the riser. After sampling slot 31 has ended sampling, sampling rod 3 is rotated to bring the notch down so that the particles in sampling slot 31 can fall into hopper 7.

In some embodiments, the sampling valve 100 shown in fig. 1 may further comprise an adapter 8 connected to the funnel 7 and a sampling bottle 9 connected to the adapter 8, such that when the sampling rod 3 is rotated such that the notch of the sampling slot 31 is downward, particles may enter the sampling bottle 9 through the funnel 7.

Because the sampling valve 100 provided by the invention aims at sampling a vertical pipeline with pressure, the cavity 101 of the valve body 1 is communicated with the pipeline during sampling, so that the cavity 101 in the valve body 1 has certain pressure after sampling is finished. Thus, in some embodiments, as shown in FIG. 2, sampling valve 100 may also include an on-off valve 12. One end of the switch valve 12 can be connected with a ventilation port on the adapter 8, and the other end of the switch valve 12 can be connected with an exhaust gas pipeline. When the on-off valve 12 is opened, particles in the hopper 7 may not remain in the hopper 7 by the residual pressure.

In a further embodiment, the adapter 8 may further comprise a blowing port, connectable to a gas source, for further cleaning particles remaining in the funnel 7, ensuring the accuracy of each sampling.

In some embodiments, the valve cover 2 shown in fig. 1 is provided at the other end of the valve body 1, and for more convenient operation of the sampling rod 3 located in the cavity 101, a part of the sampling rod 3 may be passed through the valve cover 2, so that the control of the sampling rod 3 inside the valve body 1 can be achieved by operating the sampling rod 3 outside the valve body 1. Since the external sampling rod 3 enters the inside of the valve body 1 when the external sampling rod 3 is moved, the length setting of the sampling rod 3 outside the valve body 1 needs to ensure that the sampling rod 3 located inside the valve body 1 samples smoothly.

When the sampling rod 3 enters the vertical pipe, the cavity 101 is communicated with the vertical pipe, and in order to ensure that the sampling rod 3 can move in the cavity 101, the connection part of the sampling rod 3 and the valve cover 2 cannot be completely sealed and fixed. Therefore, the interface between the valve cap 2 and the sampling rod 3 needs to be sealed to ensure that the cavity 101 remains sealed during sampling of the sampling rod 3 to prevent particles from flowing out.

In some embodiments, as shown in fig. 1, to achieve the above object, a second sealing structure 5 is provided at the interface of the valve cover 2 and the sampling rod 3, which is fixedly connected to the valve cover 2, and the second sealing structure 5 is configured as an axial seal. In some embodiments, the second sealing structure 5 may be a sealing ring.

In some embodiments, as shown in fig. 1, sampling valve 100 may further include a pressure plate 111 and a tightening bolt 112. A pressure plate 111 and a tightening bolt 112 are provided outside the valve body 1 for locking the sampling rod 3 after sampling.

In some embodiments, as shown in fig. 1, the sampling valve 100 may further include a handle 10, the handle 10 being fixedly disposed at a second preset position of the sampling rod 3 outside the valve body 1. For example, the handle 10 shown in fig. 1 is arranged at the end of the sampling rod 3 remote from the riser, in other embodiments the handle 10 may also be arranged in the middle of the sampling rod 3 outside the valve body 1. So long as the handle 10 is ensured not to affect the sampling of the sampling rod 3.

In some embodiments, the handle 10 may be integrally formed with the sampling rod 3, or the sampling rod 3 may be connected by inserting the two into the handle 10. Meanwhile, the orientation of the handle 10 is set to be the same as the notch direction of the sampling groove 31, i.e., when the handle 10 is turned to be directed upward, the notch of the sampling groove 31 is also directed upward, and when the handle 10 is turned downward, the notch of the sampling groove 31 is also turned downward. Thus, the orientation of the notch of the sampling groove 31 can be known without additional means.

In some embodiments, as shown in fig. 2, it is also possible to obtain the orientation of the notch of the sampling groove 31 by providing an indication arrow 13 on the end face of the sampling rod 3 outside the valve body 1, the indication arrow 13 pointing in the same direction as the notch. The indicator arrow 13 may be machined, for example by milling, to form an arrow-shaped recess in the end face of the sampling rod 3.

In some embodiments, the handle 10 and the indication arrow 13 may be simultaneously provided, and the indication arrow 13 is oriented in the same direction as the handle 10, so as to facilitate operation. That is, the sign and the sampling rod 3 are integrated, and no sign is separately provided.

In some embodiments, the valve body 1 itself may have a stop means. The stop means prevents the sampling rod 3 from being excessively withdrawn when sampling is performed or after the sampling is completed, and ensures that the sampling slot 31 is aligned with the funnel 7, so as to accurately drop the particles into the sampling bottle 9.

The method of using the device is briefly described below.

1. Placing a new sampling bottle 9 and opening a switch valve 12;

2. loosening the tightening bolt 112 opens the pressure plate 111, and since the notch of the sampling tank 31 is punched down in the initial state, the operation handle 10 is required to turn over the sampling rod 3 by 180 ° and push it to the bottom, and at this time, the limiting device of the sampling valve 100 can ensure that the sampling tank 31 can be just in the riser. Then the arrow 13 indicated on the "sampling rod 3" is made to face upwards and kept for a while, and falls freely by the gravity action of the powder particles in the vertical pipe, falling into the sampling slot 31 of the sampling rod 3;

3. pulling back the handle 10 and rotating 180 ° so that the medium in the sampling slot 31 on the sampling rod 3 is poured into the funnel 7 of the valve body 1 and flows into the sampling bottle 9;

4. closing the pressure plate 111, tightening the tightening bolt 112, and closing the on-off valve 12;

5. the sampling bottle 9 is taken away, and the original sampling bottle 9 is put on.

The sampling valve disclosed by the invention can be used for sampling a vertical pipeline with free blanking and pressure, can maintain a sealing state before sampling, during sampling and after sampling, and is characterized in that a sampling medium is completely isolated from the outside.

The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.

It should be understood that as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.

The foregoing embodiment of the present invention has been disclosed with reference to the number of embodiments for the purpose of description only, and does not represent the advantages or disadvantages of the embodiments.

Those of ordinary skill in the art will appreciate that: the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosure of embodiments of the invention, including the claims, is limited to such examples; combinations of features of the above embodiments or in different embodiments are also possible within the idea of an embodiment of the invention, and many other variations of the different aspects of the embodiments of the invention as described above exist, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the embodiments should be included in the protection scope of the embodiments of the present invention.

Claims

1. A sampling valve connected to a riser for sampling particles in the riser, wherein the sampling valve comprises:

the valve cover is arranged at the other end of the valve body;

a sampling rod at least partially located in the cavity, at least partially passing through the valve cover, located outside the valve body;

the second sealing structure is fixedly connected with the valve cover;

wherein a sampling rod located in the cavity is operable to move from the cavity to the riser for sampling;

a funnel, the funnel communicating with the cavity;

the adapter is connected with the funnel and further comprises an air blowing port connected with an air source;

the switching valve is connected with the ventilation port on the adapter at one end, and the exhaust gas pipeline is connected with the other end of the switching valve;

the pressure plate and the tightening bolt are arranged outside the valve body and are used for locking the sampling rod after sampling.

2. The sampling valve of claim 1, wherein the second sealing structure is configured to axially seal such that the cavity remains sealed when the sampling stem is sampling.

3. The sampling valve of claim 1, wherein the first sealing structure comprises a gasket coupled to the sampling stem and a sealing barrier coupled to the gasket;

wherein the gasket is configured to face seal such that the cavity remains sealed before and/or after sampling by the sampling rod.

4. The sampling valve of claim 3, wherein the sampling valve further comprises:

the connecting piece is used for connecting the valve body and the vertical pipe;

wherein the connector includes a loose flange for connecting the riser to the cavity.

5. The sampling valve of claim 4, wherein the radial dimension of the sampling stem in the cavity is smaller than the radial dimension of the gasket and the sealing barrier such that the gasket and the sealing barrier are always located in the loose flange before and/or after sampling.

6. The sampling valve of claim 1, wherein the sampling stem in the cavity is provided with a sampling slot at a first predetermined position, the sampling slot being operable to change a slot direction;

when the sampling groove is used for sampling, the sampling rod is rotated to enable the notch to be upward; after the sampling groove finishes sampling, the sampling rod is rotated to enable the notch to be downward, so that particles in the sampling groove fall into the funnel.

7. The sampling valve of claim 6, further comprising a handle fixedly disposed at a second predetermined position of the sampling stem outside the valve body.

8. The sampling valve of claim 7, wherein the handle is oriented the same as the notch.

9. A sampling valve according to claim 6, wherein the end of the sampling stem outside the valve body is provided with an indicating arrow pointing in the same direction as the notch.