Sampling ball valve

Abstract

The utility model belongs to the technical field of ball valves, and provides a sampling ball valve which comprises a valve body, a valve cavity is formed in the valve body, a valve element is rotationally connected into the valve cavity, at least one liquid outlet channel communicated with the valve cavity is formed in the valve body, and the liquid outlet channel penetrates through the valve body. Compared with the prior art, the sampling ball valve has the advantages that after sampling is completed, sample liquid left in the gap between the valve cavity and the valve element can be guided out through the liquid outlet channel, accumulation of the sample liquid in the gap between the valve element and the valve cavity is reduced or avoided, the rotating resistance of the valve element is remarkably reduced, sampling operation is smoother, and the use efficiency of the sampling ball valve is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ball valves, and particularly relates to a sampling ball valve. BACKGROUND

[0002] The sampling ball valve is a valve for obtaining a medium sample of a pipeline or equipment, so as to analyze the medium sample, and is widely applied to the fields of pharmaceutical machinery or chemical synthesis.

[0003] The structure of the sampling valve generally comprises a valve body, a valve cover, a ball, a valve rod and a control mechanism, wherein the valve body is provided with a sampling inlet valve channel and a sampling outlet valve channel, a valve cavity is arranged between the sampling inlet valve channel and the sampling outlet valve channel, the ball is arranged in the valve cavity, valve seats are arranged on both sides of the valve cavity relative to the valve body, a sampling cavity is arranged in the ball, the sampling cavity is communicated with the sampling inlet valve channel and the sampling outlet valve channel during rotation of the ball, during sampling, sample liquid flows into the sampling cavity from the sampling inlet valve channel, and then the sample liquid flows into the sampling outlet valve channel from the sampling cavity, and sampling is completed.

[0004] In the existing sampling ball valve, due to the gap between the ball and the valve cavity, during sampling, the sample liquid in the sampling cavity flows into the gap between the ball and the valve cavity during rotation of the ball, and after a long time of accumulation, the gap is filled with sample liquid, which significantly increases the rotation resistance of the ball in the valve cavity, thereby affecting the normal operation and service life of the valve. CONTENT OF THE UTILITY MODEL

[0005] The application aims to provide a sampling ball valve, which can guide the sample liquid remaining in the gap between the valve cavity and the valve core out of the valve cavity through the liquid outlet channel after sampling is completed, reduce or avoid the accumulation of the sample liquid in the gap between the valve core and the valve cavity, significantly reduce the rotation resistance of the valve core, make the sampling operation smoother, and improve the use efficiency of the sampling ball valve.

[0006] The application adopts the technical scheme that a sampling ball valve is provided, which comprises a valve body, a valve cavity is arranged in the valve body, a valve core is rotationally connected in the valve cavity, at least one liquid outlet channel communicating with the valve cavity is arranged on the valve body, and the liquid outlet channel penetrates the valve body.

[0007] Through the above technical features, the sample liquid remaining in the gap between the valve cavity and the valve core can be guided out of the valve cavity through the liquid outlet channel after sampling is completed, the sample liquid is prevented from staying in the valve body for a long time, thereby possibly reducing the corrosion or pollution of the internal structure of the valve body by the sample liquid, and reducing or avoiding the increase of the operation resistance caused by the accumulation of the sample liquid, the rotation resistance of the valve core is significantly reduced, the sampling operation is made smoother, and the use efficiency of the sampling ball valve is improved.

[0008] Preferably, a liquid outlet hole communicating with the liquid outlet channel is arranged on the valve body, and a plug is arranged at the liquid outlet hole.

[0009] By the above technical features, during the sampling process, the plug is ensured to be in a closed state to avoid the medium from flowing out in advance. After the sampling is completed, the plug is opened, and the sample liquid remaining in the gap between the valve core and the valve cavity will flow out of the liquid outlet hole through the liquid outlet channel. The user can also open the plug according to the need when the valve core is not rotating smoothly or the sampling accuracy is reduced, and clean the gap between the valve core and the valve cavity through the liquid outlet channel, which is flexible and convenient to operate.

[0010] Preferably, the plug is provided with a grabbing part outside the liquid outlet hole.

[0011] By the above technical features, the liquid outlet hole can be easily opened or closed through the grabbing part, and the operation is more convenient.

[0012] Preferably, the valve core is a spherical valve core, a sampling cavity communicating with the valve cavity is arranged in the valve core, and the cross section of the sampling cavity is inverted trapezoidal from the opening of the sampling cavity to the bottom of the sampling cavity.

[0013] By the above technical features, when the sample liquid enters, the larger opening area of the inverted trapezoidal sampling cavity is beneficial to the smooth flow of the sample liquid. As the sample liquid moves to the deep part of the sampling cavity, the cross-sectional area gradually decreases, which helps to slow down the flow rate of the medium and promote the uniform distribution and mixing of the medium in the sampling cavity. Moreover, the gravity center of the inverted trapezoidal sample liquid cavity is low, and the side wall of the sample liquid cavity can more effectively disperse the lateral force of the sample liquid acting on the side wall, reduce local stress concentration, enhance the overall stability, and avoid the shaking of the ball core due to stress concentration after the sampling cavity is connected to the sample liquid. Moreover, during the sampling process, when the ball core rotates to make the sampling cavity communicate with the liquid outlet channel, the sample liquid will flow downward along the inclined surface of the inverted trapezoidal shape, which helps to reduce the residue of the medium in the sampling cavity and improve the accuracy of sampling.

[0014] Preferably, a sampling pipe and a sample outlet pipe communicating with the valve cavity are arranged on the valve body, a sealing gasket is arranged between the valve core and the inner cavity wall of the valve cavity, an inlet channel communicating with the sampling pipe and the valve cavity is arranged on the sealing gasket, an outlet channel communicating with the sample outlet pipe and the valve cavity is arranged on the sealing gasket, and the liquid outlet channel penetrates through the sealing gasket and communicates with the valve cavity.

[0015] By the above technical features, the sealing gasket is located between the valve core and the inner cavity wall of the valve cavity, which plays a sealing role to prevent the sample liquid from leaking from the gap between the valve core and the valve cavity during the sampling process, and improves the sealing performance of the sampling ball valve.

[0016] Preferably, the number of liquid outlet channels is two, and the two liquid outlet channels are respectively located on both sides of the outlet channel of the sealing gasket.

[0017] By the technical features, when sampling, the sample liquid flows through the outlet channel on the sealing gasket into the sample outlet pipe, so the liquid outlet channels are arranged on both sides of the outlet channel of the sealing gasket, which ensures that the sample liquid remaining between the valve cavity and the valve core can be discharged from the liquid outlet channels as much as possible, and improves the discharge effect of the liquid outlet channels. In addition, the double liquid outlet channels are arranged to disperse the liquid discharge, which further improves the liquid discharge efficiency.

[0018] Preferably, the cross section of the inlet channel is rectangular, the diameter of the inlet channel is smaller than the diameter of the opening of the sampling cavity, the cross section of the outlet channel is trapezoidal, the diameter of the outlet channel near the one end of the valve cavity is consistent with the diameter of the opening of the sampling cavity, and the diameter of the outlet channel near the one end of the sample outlet pipe is larger than the diameter of the opening of the sampling cavity.

[0019] By the technical features, the cross section of the inlet channel is rectangular and the diameter is smaller than the opening of the sampling cavity, which helps to reduce the vortex and turbulence of the sample liquid in the inlet channel, thereby improving the accuracy of sampling, and helps to increase the flow rate of the medium, so that the sampling is more rapid and effective. The trapezoidal cross section of the outlet channel makes the sample liquid experience a gradual diffusion process during the flow-out process. Near the one end of the valve cavity, the diameter of the outlet channel is consistent with the opening of the sampling cavity, which helps to maintain the stability of the sample liquid during the flow-out process. Near the one end of the sample outlet pipe, the diameter of the outlet channel increases, which helps to reduce the resistance of the sample liquid during the flow-out process and improve the liquid discharge efficiency. At the same time, the inverted trapezoidal diffusion also helps to prevent the sample liquid from generating vortex and turbulence at the outlet, thereby protecting the sample outlet pipe from damage.

[0020] Preferably, the one end of the sample outlet pipe away from the valve cavity is connected with a connecting pipe, the connecting pipe is used to connect a sampling bottle, the sample outlet pipe is provided with a sample outlet channel penetrating through the sample outlet pipe, the sample outlet channel communicates with the connecting pipe, the cross section of the sample outlet channel is trapezoidal, the diameter of the sample outlet channel near the one end of the sealing gasket is consistent with the diameter of the one end of the outlet channel away from the valve cavity, and the diameter of the sample outlet channel near the one end of the connecting pipe is larger than the diameter of the one end of the outlet channel away from the valve cavity.

[0021] By the technical features, when the sample liquid in the valve cavity enters the sample outlet pipe through the outlet channel, it first enters a relatively narrow channel inlet, and then gradually enters a wider channel area during the flow process, which helps to the smooth flow of the liquid and can reduce the generation of turbulence and air bubbles to a certain extent. Subsequently, through the connecting pipe, the sample liquid in the sample outlet pipe can smoothly enter the sampling bottle.

[0022] Preferably, the connecting pipe is provided with a first connecting channel and a second connecting channel in communication, one end of the first connecting channel is in communication with the sample outlet channel, and one end of the second connecting channel is in communication with the sample bottle; the first connecting channel and the second connecting channel are in the same straight line, or the first connecting channel and the second connecting channel are perpendicular.

[0023] Through the above technical features, the first connecting channel and the second connecting channel in the connecting pipe can be in the same straight line. If the flow direction needs to be changed, the first connecting channel and the second connecting channel can be arranged vertically, which provides more layout options in a limited space, and helps to adapt to different installation environments and needs. In actual application, appropriate layout mode can be selected according to specific needs and environmental conditions.

[0024] Preferably, the connecting pipe is provided with a first connecting channel and a second connecting channel in communication, one end of the first connecting channel is in communication with the sample outlet channel, and one end of the second connecting channel is in communication with the sample bottle; the first connecting channel and the second connecting channel are in the same straight line, or the first connecting channel and the second connecting channel are perpendicular.

[0025] Through the above technical features, the sample liquid flows from the sample outlet channel to the sample bottle through the connecting pipe, and some gas may be entrained in the process. When the gas reaches the exhaust channel, the gas can be smoothly discharged to the external environment through the exhaust channel because the exhaust channel is in communication with the outside. The sample liquid continues to flow to the sample bottle, the exhaust channel helps to reduce the gas content in the sample liquid, thereby maintaining the stability of the sample liquid during the flow process, reducing the fluctuations and interference caused by the presence of gas, and maintaining the pressure balance.

[0026] In summary, the present application has the following beneficial effects:

[0027] (1) The present application guides the sample liquid remaining in the gap between the valve cavity and the valve core out through the liquid outlet channel, reduces or avoids the accumulation of sample liquid in the gap between the valve core and the valve cavity, significantly reduces the rotation resistance of the valve core, makes the sampling operation more smooth, and improves the use efficiency of the sampling ball valve.

[0028] (2) The inverted trapezoidal sample liquid chamber has a low center of gravity, and the side wall of the sample liquid chamber can more effectively disperse the lateral force of the sample liquid acting on the side wall, reduce local stress concentration, enhance overall stability, avoid the shaking of the ball core after the sample chamber is connected to the sample liquid, and improve the sampling precision.

[0029] (3) The first connecting channel and the second connecting channel in the connecting pipe can be in the same straight line. If the flow direction needs to be changed, the first connecting channel and the second connecting channel can be arranged vertically, which provides more layout options in a limited space, and helps to adapt to different installation environments and needs. In actual application, appropriate layout mode can be selected according to specific needs and environmental conditions. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A schematic diagram of the overall structure of an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the cross-sectional structure of an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the cross-sectional structure of a valve body of an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the cross-sectional structure of a connecting tube and a sample bottle of an embodiment of the present application Figure 1 ;

[0034] Figure 5 A schematic diagram of the cross-sectional structure of a connecting tube and a sample bottle of an embodiment of the present application Figure 2 .

[0035] In the figure, 1, valve body; 11, valve cavity; 12, liquid outlet channel; 13, liquid outlet hole; 14, plug; 141, gripping portion; 15, handle; 2, valve core; 21, sampling cavity; 3, sampling tube; 4, sample outlet tube; 41, sample outlet channel; 5, sealing gasket; 51, inlet channel; 52, outlet channel; 6, connecting tube; 61, first connecting channel; 62, second connecting channel; 63, exhaust channel; 7, sample bottle. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present application and further describe the technical solutions of the present application in conjunction with the accompanying drawings, but the present application is not limited to these embodiments.

[0037] As shown in Figure 1 , Figure 2 , the present application discloses a sampling ball valve, comprising: a valve body 1, a valve cavity 11 is arranged in the valve body 1, a sampling tube 3 and a sample outlet tube 4 are arranged on the valve body 1 and communicate with the valve cavity 11, a spherical valve core 2 is rotatably connected in the valve cavity 11, a sampling cavity 21 is arranged in the valve core 2 and communicates with the valve cavity 11, a handle 15 is rotatably connected to the valve body 1, one end of the handle 15 extends into the valve body 1 and is connected to the outside of the valve core 2, a connecting tube 6 is connected to the end of the sample outlet tube 4 away from the valve cavity 11, and the connecting tube 6 is used to connect a sampling bottle.

[0038] As shown in Figure 3As shown, a sealing gasket 5 is provided between the valve core 2 and the inner wall of the valve cavity 11. The sealing gasket 5 is provided with an inlet channel 51 that connects the sampling tube 3 and the valve cavity 11, and an outlet channel 52 that connects the sample outlet tube 4 and the valve cavity 11. The inlet channel 51 has a rectangular cross-section and its diameter is smaller than the diameter of the opening of the sampling cavity 21. The outlet channel 52 has a trapezoidal cross-section. The diameter of the outlet channel 52 near the valve cavity 11 is the same as the diameter of the opening of the sampling cavity 21, and the diameter of the outlet channel 52 near the sample outlet tube 4 is larger than the diameter of the opening of the sampling cavity 21.

[0039] The valve body 1 has outlet channels 12 on both sides of the outlet channel 52 of the sealing gasket 5. The outlet channels 12 pass through the valve body 1 and communicate with the sealing gasket 5 and the valve cavity 11. The valve body 1 has an outlet hole 13 that communicates with the outlet channel 12. A plug 14 is provided at the outlet hole 13. The plug 14 extends to the outside of the outlet hole 13 and has a gripping part 141. During the sampling process, the plug 14 is in the closed state to prevent the sample liquid from flowing out prematurely. After the sampling is completed, the plug 14 is opened, and the sample liquid remaining in the gap between the valve core 2 and the valve cavity 11 flows out of the outlet channel 12 from the outlet hole 13.

[0040] The cross-section of the sampling cavity 21 is an inverted trapezoid from its opening to its bottom. This inverted trapezoidal shape allows for smooth sample flow due to its larger opening area. As the sample moves deeper into the cavity, the cross-sectional area gradually decreases, helping to slow the flow rate and promote uniform distribution and mixing within the cavity. Furthermore, the lower center of gravity of the inverted trapezoidal cavity allows for more effective dispersion of lateral forces exerted by the sample on the sidewalls, reducing local stress concentration, enhancing overall stability, and preventing the core from shaking due to stress concentration after sample entry. During sampling, when the core rotates to connect the sampling cavity 21 with the outlet channel 12, the sample flows downwards along the slope of the inverted trapezoid, helping to reduce media residue within the cavity and improving sampling accuracy.

[0041] The sample outlet tube 4 is provided with a sample outlet channel 41 that runs through the sample outlet tube 4. The sample outlet channel 41 is connected to the connecting tube 6. The cross-section of the sample outlet channel 41 is trapezoidal. The diameter of the end of the sample outlet channel 41 near the sealing gasket 5 is the same as the diameter of the end of the outlet channel 52 away from the valve cavity 11. The diameter of the end of the sample outlet channel 41 near the connecting tube 6 is larger than the diameter of the end of the outlet channel 52 away from the valve cavity 11.

[0042] like Figure 4 , Figure 5As shown, the connecting pipe 6 is provided with a first connecting channel 61 and a second connecting channel 62 in communication, one end of the first connecting channel 61 is in communication with the sample outlet channel 41, one end of the second connecting channel 62 is in communication with the sample bottle 7, the connecting pipe 6 is further provided with an exhaust channel 63 in communication with the second connecting channel 62, one end of the exhaust channel 63 is in communication with the outside through the connecting pipe 6.

[0043] The first connecting channel 61 and the second connecting channel 62 can be on the same straight line (as shown in Figure 4 If it is necessary to change the flow direction, the first connecting channel 61 can also be perpendicular to the second connecting channel 62 (as shown in Figure 5 In practice, the appropriate layout mode can be selected according to the specific requirements and environmental conditions.

[0044] Working principle: in use, rotate the handle 15 to make the opening of the sampling cavity 21 in communication with the sampling pipe 3, make the sample liquid flow into the sampling cavity 21 of the valve core 2 in the valve cavity 11 through the sampling pipe 3, then rotate the handle 15 to make the opening of the sampling cavity 21 on the valve core 2 in communication with the sample outlet pipe 4, make the sample liquid in the sampling cavity 21 flow into the sample bottle through the sample outlet pipe 4 through the connecting pipe 6, complete the sampling.

[0045] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the scope defined by the present application.

Claims

1. A sampling ball valve comprising: The utility model provides a valve body (1), be equipped with valve cavity (11) in the valve body (1), valve core (2) is rotatably connected in the valve cavity (11), characterized by being equipped with at least one liquid outlet channel (12) of the valve cavity (11) in the valve body (1), the liquid outlet channel (12) penetrates the valve body (1).

2. A sampling globe valve according to claim 1, wherein, The valve body (1) is provided with a liquid outlet hole (13) communicating with the liquid outlet channel (12), and a plug (14) is arranged at the liquid outlet hole (13).

3. A sampling globe valve according to claim 2, wherein, The plug (14) is provided with a gripping portion (141) extending to the outside of the liquid outlet hole (13).

4. A sampling globe valve according to any one of claims 1-3, characterized in that The valve core (2) is a spherical valve core (2), a sampling cavity (21) communicating with the valve cavity (11) is arranged in the valve core (2), and the cross section of the sampling cavity (21) is inverted trapezoidal from the opening of the sampling cavity (21) to the cavity bottom of the sampling cavity (21).

5. A sampling globe valve according to claim 4, wherein, The valve body (1) is provided with a sampling tube (3) and a sample outlet tube (4) communicating with the valve cavity (11), a sealing gasket (5) is arranged between the valve core (2) and the inner cavity wall of the valve cavity (11), the sealing gasket (5) is provided with an inlet channel (51) communicating with the sampling tube (3) and the valve cavity (11), and the sealing gasket (5) is provided with an outlet channel (52) communicating with the valve cavity (11) and the sample outlet tube (4), and the liquid outlet channel (12) penetrates the sealing gasket (5) and communicates with the valve cavity (11).

6. A sampling globe valve according to claim 5, wherein, The number of the liquid outlet channel (12) is two, and the two liquid outlet channels (12) are respectively located on the two sides of the outlet channel (52) of the sealing gasket (5).

7. A sampling ball valve according to claim 5, wherein, The cross section of the inlet channel (51) is rectangular, the diameter of the inlet channel (51) is smaller than the diameter of the opening of the sampling cavity (21), the cross section of the outlet channel (52) is trapezoidal, the diameter of the outlet channel (52) close to one end of the valve cavity (11) is consistent with the diameter of the opening of the sampling cavity (21), and the diameter of the outlet channel (52) close to one end of the sample outlet tube (4) is larger than the diameter of the opening of the sampling cavity (21).

8. A sampling globe valve according to claim 7, wherein, The sample outlet tube (4) is connected with a connecting tube (6) away from the valve cavity (11), the connecting tube (6) is used for connecting a sampling bottle, the sample outlet tube (4) is provided with a sample outlet channel (41) penetrating the sample outlet tube (4), the sample outlet channel (41) communicates with the connecting tube (6), the cross section of the sample outlet channel (41) is trapezoidal, the diameter of the sample outlet channel (41) close to one end of the sealing gasket (5) is consistent with the diameter of the end of the outlet channel (52) away from the valve cavity (11), and the diameter of the sample outlet channel (41) close to one end of the connecting tube (6) is larger than the diameter of the end of the outlet channel (52) away from the valve cavity (11).

9. A sampling globe valve according to claim 8, wherein, The connecting pipe (6) is provided with a first connecting channel (61) and a second connecting channel (62) in communication, one end of the first connecting channel (61) is in communication with the sample outlet channel (41), one end of the second connecting channel (62) is in communication with a sample bottle; the first connecting channel (61) and the second connecting channel (62) are in the same straight line, or the first connecting channel (61) and the second connecting channel (62) are perpendicular.

10. A sampling globe valve according to claim 9, wherein, The connecting pipe (6) is provided with an exhaust channel (63) in communication with the second connecting channel (62), one end of the exhaust channel (63) penetrates through the connecting pipe (6) and is in communication with the outside.

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