Sampling valve

Abstract

The sampling valve comprises a valve body, a valve element and a hand wheel, wherein the valve element and the hand wheel are installed in the valve body. The valve core is in threaded connection with the valve body; the hand wheel is connected with the end of the valve element in a sleeved mode, the section of the sleeved connection position is non-circular, and then the valve element is driven by rotation of the hand wheel to move in the valve body in the axial direction. Driving of the valve element is limited by pulling the hand wheel out of the valve element. The valve has the beneficial effects that the hand wheel and the valve element can be separated, driving of the valve element can be limited, and the hand wheel controls driving of the valve element according to actual requirements. Compared with a traditional mode, the valve element is connected with the hand wheel in a sleeving mode, when the sampling part does not need to be opened, the hand wheel is pulled out, the valve element loses driving, and then it can be ensured that a medium sample needing secrecy cannot be taken away by irrelevant personnel.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a 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.

[0003] The existing sampling valves have the following main problems when in use:

[0004] (1) For media samples that need to be kept confidential, sampling needs to be done by a dedicated person, but conventional sampling valves do not have an anti-theft function.

[0005] (2) Generally speaking, the sampling point of the sampling valve is set on the side of the flow path of the medium sample. The pressure at this position is relatively high. Frequent opening of the sampling valve for sampling can easily cause corrosion near the sampling position to intensify, thereby reducing the service life of the sampling valve.

[0006] Therefore, it is now necessary to modify the existing sampling valve. Utility Model Content

[0007] The purpose of the present application is to provide a sampling valve that can solve at least one of the defects in the above-mentioned background technology.

[0008] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a sampling valve, comprising a valve body, a valve core and a handwheel installed in the valve body; the valve core is threadedly connected to the valve body; the handwheel is sleeved on the end of the valve core, and the cross-section of the sleeved position is non-circular, so that the valve core moves axially in the valve body under the rotation of the handwheel; the drive of the valve core is limited by pulling the handwheel out of the valve core.

[0009] Preferably, the hand wheel is sleeved with the end of the valve core through a sleeve hole, and the sleeve cross-sectional shape of the sleeve hole and the valve core is any one of a regular hexagon, a triangle and an ellipse.

[0010] Preferably, the valve core is sleeved with a guide rod provided at the end of the valve core through a sleeve hole, and the cross-sectional shape of the sleeve hole and the guide rod sleeved position is any one of a regular hexagon, a triangle and an ellipse.

[0011] Preferably, the valve body comprises a valve cavity, and the valve cavity is provided with a feed port, a discharge port and a sampling portion; the valve core is suitable for sealingly cooperating with the sampling portion.

[0012] Preferably, the feed port and the discharge port are suitable for being connected to the outside through any one of flange connection, threaded connection and quick-connection.

[0013] Preferably, the outer end of the sampling portion is suitable for being connected to the outside through any one of flange connection, threaded connection and quick-connection.

[0014] Preferably, the sampling portion includes a discharge section and a feed section; the sealing end of the valve core is located in the feed section and is sealed by abutting against the inner end of the discharge section; the diameter of the sealing end of the valve core is larger than the diameter of the discharge section and smaller than the diameter of the feed section, so that the sealing end of the valve core cooperates with the feed section and the discharge section to form a feed channel; the feed channel is suitable for reducing the feed flow rate to achieve buffering.

[0015] Preferably, the inner end of the discharge section is arranged to protrude in the direction of the feed section, so that the side of the protruding position of the discharge section is connected with the feed channel to form a buffer groove.

[0016] Preferably, the side portion of the raised position of the discharge section is an inclined surface or a curved surface.

[0017] Preferably, the inner side of the buffer groove is arc-shaped.

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] By setting the handwheel and the valve core to be separable, the drive of the valve core can be limited, and the handwheel controls the drive of the valve core according to actual needs. Compared with the traditional method, the present application sets the valve core and the handwheel to be sleeved, and when the sampling part does not need to be opened, the handwheel is pulled out to make the valve core lose drive, thereby ensuring that the medium sample that needs to be kept confidential will not be taken away by irrelevant personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 For this utility model Figure 1 A local enlarged schematic diagram of point A in the middle.

[0022] Figure 3 It is a partial schematic diagram of the cross-sectional structure of the hand wheel and the valve core in the utility model.

[0023] Figure 4 It is a partially enlarged schematic diagram of another matching connection mode between the hand wheel and the valve core in the utility model.

[0024] Figure 5 For this utility model Figure 1A partial enlarged schematic diagram of the opening of the sampling part at B in the middle.

[0025] Figure 6 It is a partially enlarged schematic diagram of another structure of the buffer tank in the utility model.

[0026] In the figure: valve body 1, valve cavity 10, feed port 11, discharge port 12, sampling part 13, feed section 130, feed channel 1300, discharge section 131, buffer groove 132, transition edge 1320, hand wheel 2, first set of holes 20, second connecting rod 21, valve core 3, valve stem 30, first connecting rod 300, second set of holes 301, valve head 31. DETAILED DESCRIPTION

[0027] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0030] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0031] One of the preferred embodiments of the present application is as follows: Figures 1 to 4As shown, a sampling valve comprises a valve body 1, a valve core 3 and a hand wheel 2 installed in the valve body 1, and the valve core 3 and the valve body 1 are threadedly connected. The hand wheel 2 can be sleeved with the end of the valve core 3, and the cross-sectional shape of the sleeved position is non-circular, so that the valve core 3 moves axially in the valve body 1 under the rotation of the hand wheel 2. After the adjustment of the valve core 3 is completed, the hand wheel 2 can be pulled out from the end of the valve core 3 to limit the drive of the valve core 3, thereby preventing the medium sample that needs to be kept confidential in the valve body 1 from being taken away by unrelated personnel.

[0032] It can be understood that in this embodiment, the handwheel 2 is equivalent to the "key" for driving the sampling valve, that is, when it is necessary to sample the medium sample, the handwheel 2 can be inserted into the corresponding position of the valve body 1 and sleeved with the end of the valve core 3, and then the valve core 3 can be driven to rotate by rotating the handwheel 2. During the rotation of the valve core 3, the valve core 3 can be axially moved relative to the valve body 1 by the threaded cooperation between the valve core 3 and the valve body 1, so as to realize the sampling of the medium sample. After the sampling of the medium sample is completed, the handwheel 2 can be pulled out from the corresponding position of the valve body 1, and at this time, it is impossible or difficult for unrelated personnel to directly drive the valve core 3 to sample the medium sample. Of course, in order to further ensure the safety of the medium sample, the end of the valve core 3 connected to the handwheel 2 can be set in the valve body 1, that is, the handwheel 2 needs to be provided with a connection portion extending into the valve body 1 to connect with the valve core 3; so that after the handwheel 2 is separated from the valve core 3 and the valve body 1 is pulled out, unrelated personnel cannot directly contact the valve core 3, that is, it is basically impossible to open the sampling valve without the handwheel 2. Of course, pulling out the hand wheel 2 can also prevent the staff from accidentally touching the hand wheel.

[0033] In this embodiment, the valve core 3 includes a valve stem 30 and a valve head 31, the valve stem 30 is connected with the valve head 31, the hand wheel 2 can be sleeved on the end of the valve stem 30 away from the valve head 31, and the cross section of the sleeved position is non-circular, and then the valve stem 30 drives the valve head 31 to move axially in the valve body 1 under the rotation of the hand wheel 2, so as to realize the sampling of the medium sample. By pulling out the hand wheel 2, the driving of the hand wheel 2 on the valve stem 30 is limited to prevent irrelevant personnel from sampling the medium sample.

[0034] In this embodiment, there are many specific ways to sleeve the valve stem 30 and the hand wheel 2, which can be explained by two specific examples below, but the specific structure of the sleeve connection between the valve stem 30 and the hand wheel 2 is not limited to these two examples.

[0035] Example 1: Figure 2 As shown, the hand wheel 2 is provided with a first set of holes 20, and the end of the valve stem 30 is provided with a first connecting rod 300 with the same cross-sectional shape as the first set of holes 20, and the cross-sectional shape of the first connecting rod 300 and the first set of holes 20 at the sleeve position is non-circular.

[0036] Specifically, the cross-section of the first connecting rod 300 and the first sleeve hole 20 can be in any shape of a regular hexagon, a triangle, an ellipse, etc. For ease of understanding, a regular hexagon is taken as an example. Figure 2 As shown, the cross-section of the first connecting rod 300 and the first set of holes 20 at the position where they are sleeved are both in the shape of a regular hexagon. Thus, the hand wheel 2 can extend into the valve cavity 10 of the valve body 1 through the first set of holes 20 with a regular hexagonal cross-section deformation and be sleeved with the first connecting rod 300 arranged at the end of the valve core 30, and then when the hand wheel 2 is rotated, a counteracting force is generated between the first connecting rod 300 and the first set of holes 20, thereby prompting the first set of holes 20 to drive the first connecting rod 300 to rotate around the axial direction, and then drive the valve stem 30 to move axially in the valve body 1. If the cross-section of the first connecting rod 300 and the first set of holes 20 at the position where they are sleeved is circular, when the hand wheel 2 is rotated, no force is generated between the first connecting rod 300 and the first set of holes 20, and the two do not cooperate, so that the first set of holes 20 cannot drive the first connecting rod 300 to rotate axially, and then the valve stem 30 cannot move axially in the valve body 1.

[0037] Example 2: Figure 4 As shown, the end of the valve stem 30 has a second hole 301, and the hand wheel 2 is provided with a second connecting rod 21 with the same cross-sectional shape as the second hole 301, and the cross-sectional shape of the second connecting rod 21 and the second hole 301 at the sleeve position is non-circular.

[0038] Specifically, the shape of the cross section of the second connecting rod 21 and the first sleeve hole 20 can be any one of a regular hexagon, a triangle and an ellipse. For ease of understanding, a regular hexagon is taken as an example. Figure 2 As shown, the cross-section of the second connecting rod 21 and the second hole 301 at the sleeve position is a regular hexagon. Therefore, the hand wheel 2 can be extended into the valve cavity 10 of the valve body 1 through the second connecting rod 21 with a regular hexagonal cross-section and be sleeved with the second hole 301 set at the end of the valve core 30, and then when the hand wheel 2 is rotated, the second connecting rod 21 and the second hole 301 generate a counteracting force, so that the second connecting rod 21 drives the second hole 301 to rotate around the axial direction, and then drives the valve stem 30 to move axially in the valve body 1.

[0039] It can be understood that the above two examples can both meet the needs of this application, and technicians in this field can make their own selection according to actual needs.

[0040] In this embodiment, the valve body 1 includes a valve cavity 10, which can be divided into two parts, one of which is provided with a feed port 11, a discharge port 12 and a sampling portion 13 for conveying and sampling medium samples; the other part is used for connecting the handwheel 2 and the valve stem 30; the two parts are sealed and isolated by the middle part of the valve stem 30.

[0041] In this embodiment, there are many ways to connect the feed port 11, the discharge port 12 and the sampling portion 13 to the outside, such as flange connection, threaded connection and quick connection, etc. The ways in which the feed port 11, the discharge port 12 and the sampling portion 13 are connected to the outside can be the same or different, and can be selected according to actual needs.

[0042] It should be noted that the specific structures and working principles of flange connection, threaded connection and quick-release connection are well-known technologies to those skilled in the art, so they will not be elaborated in detail here. Figure 1 As shown, the outside of the feed port 11 and the sampling part 13 are connected to the external pipeline by a flange structure, and the discharge port 12 is threadedly connected to the external pipeline by a set threaded section. For the flange structure, the flange plate can be installed on the outer end of the feed port 11 and the sampling part 13 by fasteners or welding. The threaded section of the discharge port 12 can be used to connect an internal thread stop valve and an internal thread ball valve. If a quick-install connection is used, it can be used to match the connection of a quick-install diaphragm valve.

[0043] In this embodiment, Figure 5 As shown, the sampling portion 13 includes a discharge section 131 and a feed section 130, and the valve head 31 is located in the feed section 130 and is sealed by abutting against the inner end of the discharge section 131. The diameter of the valve head 31 is smaller than the diameter of the feed section 130, so that the side of the valve head 31 and the feed section 130 are matched through a gap to form a feed channel 1300, and the feed channel 1300 can reduce the feed flow rate to achieve buffering.

[0044] Specifically, Figure 5 As shown, the diameter of the discharge section 131 is smaller than the diameter of the feed section 130, and the diameter of the valve head 31 is larger than the diameter of the discharge section 131 and smaller than the diameter of the feed section 130, so when the valve head 31 is away from the inner end of the discharge section 131, the medium sample can flow along the feed channel 1300 to the inner end position close to the discharge section 131, and needs to bend 90° along the end surface of the valve head 31 to flow to the discharge section 131 and then bend 90° to be discharged. By narrowing the flow path of the medium sample and designing the bend, the impact force of the medium sample can be effectively reduced to achieve buffering.

[0045] In this embodiment, Figure 5 As shown, the inner end of the discharge section 131 is protruded toward the feed section 130 , so that the protruding side of the discharge section 131 is connected to the feed channel 1300 to form a buffer groove 132 .

[0046] It is understandable that after the medium sample flows in along the feed channel 1300, it may impact the inner end of the discharge section 131, which may cause wear and erosion to the inner end of the discharge section 131 over time, thereby affecting the use of the valve body 1. In this embodiment, the side of the discharge section 131 is provided with a protrusion to communicate with the feed channel 1300 to form a buffer groove 132, so that when the medium sample flows into the buffer groove 132 along the side gap between the feed section 130 and the valve core 31, the cross-sectional area of ​​the buffer groove 132 is larger than the cross-sectional area of ​​the feed channel 1300, so that the flow rate of the medium sample after entering the buffer groove 132 is reduced, thereby effectively reducing the impact force of the medium sample to achieve buffering.

[0047] In this embodiment, Figure 5 and Figure 6 As shown, the convex side of the discharge section 131 is an inclined surface or an arc surface, so as to guide the buffered medium sample in the buffer groove 132 .

[0048] It is understandable that if the inner end protrusion of the discharge section 131 is a straight structure, that is, the buffer groove 132 is an annular groove, and then after the medium sample is buffered in the buffer groove 132, the medium sample needs to turn 180 degrees to flow to the inner end position of the discharge section 131 to achieve discharge; this will result in a larger flow resistance of the medium sample. In this embodiment, by setting the side of the inner end protrusion position of the discharge section 131 with an inclined surface or an arc surface, the medium sample can flow along the inclined surface or the arc surface to the inner end position of the discharge section 131 after completing the buffering in the buffer groove 132, thereby improving the flow stability of the buffered medium sample.

[0049] In this embodiment, Figure 6 As shown, an arc-shaped transition edge 1320 is provided on the inner side of the buffer groove 132, so that after the medium sample enters the buffer groove 132 and is buffered, it can guide itself along the transition edge 1320, that is, the transition edge 1320 can provide guidance for the flow reversal of the medium sample to further improve the fluidity of the medium sample.

[0050] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A sampling valve, characterized in that: It includes a valve body, a valve core and a handwheel installed in the valve body; the valve core is threadedly connected to the valve body; the handwheel is sleeved on the end of the valve core, and the cross-section of the sleeved position is non-circular, so that the valve core moves axially in the valve body under the rotation of the handwheel; the drive of the valve core is limited by pulling the handwheel out of the valve core.

2. A sampling valve according to claim 1, characterized in that: The hand wheel is sleeved with the end of the valve core through a sleeve hole, and the sleeve cross-sectional shape of the sleeve hole and the valve core is any one of a regular hexagon, a triangle and an ellipse.

3. A sampling valve according to claim 1, characterized in that: The valve core is sleeved with a guide rod arranged at the end of the valve core through a sleeve hole, and the cross-sectional shape of the sleeve hole and the guide rod sleeved position is any one of a regular hexagon, a triangle and an ellipse.

4. A sampling valve according to claim 1, characterized in that: The valve body comprises a valve cavity, and the valve cavity is provided with a feed port, a discharge port and a sampling portion; the valve core is suitable for sealingly cooperating with the sampling portion.

5. A sampling valve as claimed in claim 4, characterized in that: The feed port and the discharge port are suitable for being connected to the outside through any one of flange connection, threaded connection and quick-connection.

6. A sampling valve as claimed in claim 4, characterized in that: The outer end of the sampling part is suitable for being connected to the outside through any one of flange connection, threaded connection and quick-connection.

7. A sampling valve as claimed in claim 4, characterized in that: The sampling portion includes a discharge section and a feed section; the sealing end of the valve core is located in the feed section and is sealed by abutting against the inner end of the discharge section; the diameter of the sealing end of the valve core is larger than the diameter of the discharge section and smaller than the diameter of the feed section, so that the sealing end of the valve core cooperates with the feed section and the discharge section to form a feed channel.

8. A sampling valve according to claim 7, characterized in that: The inner end of the discharge section is arranged to protrude toward the feeding section, so that the protruding side of the discharge section is connected with the feeding channel to form a buffer groove.

9. A sampling valve according to claim 8, characterized in that: The convex side of the discharge section is an inclined surface or a curved surface.

10. A sampling valve according to claim 8, characterized in that: The inner side of the buffer groove is arc-shaped.

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