A sampling and drainage structure for a valve body

Abstract

This utility model discloses a sampling and drainage structure for a valve body, including a first channel with one end connected to a medium channel inside the valve body and a second channel with one end connected to the other end of the first channel. The valve body is provided with a miniature valve for opening and closing the first channel and regulating the flow rate of the medium passing through the first channel. The valve core of the miniature valve is located at the connection between the first and second channels and inserted into the first channel. The valve body is also provided with a sampling and drainage channel, and the second channel is connected to the sampling and drainage channel. A plug is also provided at the outlet end of the sampling and drainage channel. This utility model is applicable to various valves such as double-ball valves and check valves, and is used to realize the sampling and drainage of the medium inside the valve. It can also be opened for pressure relief. The miniature valve is used to open and close the first channel and regulate the flow rate of the medium discharged from the valve, while the plug is used to close the sampling and drainage channel. It has the advantages of simple structure and convenient use.

Description

Technical Field

[0001] This utility model relates to a sampling and sewage discharge structure for a valve body. Background Technology

[0002] In existing technologies, valves are generally only equipped with a drain port (or drain channel), and the outlet end of the drain port is sealed. Such drain ports or drain channels cannot regulate the flow rate, and therefore are difficult to use for media sampling. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a sampling and drainage structure for a valve body, which, when installed on the valve body, can realize the sampling and drainage of the medium inside the valve.

[0004] The technical solution of this utility model is: a sampling and sewage discharge structure for a valve body, including a first channel with one end connected to the medium channel inside the valve body and a second channel with one end connected to the other end of the first channel; The valve body is provided with a miniature valve for opening and closing the first channel and regulating the flow rate of the medium passing through the first channel. The valve core of the miniature valve is located at the connection between the first channel and the second channel and is inserted into the first channel. The valve body is also provided with a sampling and sewage discharge channel, the second channel is connected to the sampling and sewage discharge channel, and the outlet end of the sampling and sewage discharge channel is also provided with a plug.

[0005] Specifically, the second channel is an oblique channel.

[0006] Specifically, the valve body is a double-ball valve, and the first channel connects the medium channel between the two valve chambers inside the valve body.

[0007] Specifically, the miniature valve is a needle valve, and the plug is a weld neck flange plus blind flange structure or a plug.

[0008] Furthermore, the sealing structure is a weld neck flange plus a blind flange structure, wherein the weld neck flange is welded to the valve body, and an octagonal ring is provided at the connection between the blind flange and the weld neck flange.

[0009] Specifically, the valve body is a one-way valve.

[0010] Furthermore, the medium channel includes an input end and an output end, which are not connected. One end of the first channel is connected to the input end, and the other end of the first channel is connected to the output end through a third channel that is set at an angle. It also includes a fourth channel, one end of which is connected to the connection between the first and third channels via an inclined fifth channel, and the other end of which is connected to the second channel; The valve body is provided with two miniature valves, which are respectively set at the connection points of the first channel, the third channel and the fifth channel, and the connection point of the fourth channel and the second channel.

[0011] Furthermore, the end of the third channel away from the first channel is also connected to the sixth channel, and the sixth channel is connected to the output end through the inclined seventh channel. The valve is also provided with miniature valves corresponding to the connection points of the third, sixth and seventh channels.

[0012] Optionally, the miniature valve is a threaded needle valve or a bolt-type needle valve.

[0013] The beneficial effects of this utility model are: This utility model is applicable to various valves such as double ball valves and check valves, and is used to realize the sampling and discharge of the medium inside the valve. It can also be opened for pressure relief. Among them, the miniature valve is used to open and close the first channel and regulate the flow rate of the medium discharged from the valve, while the plug is used to close the sampling and discharge channel. It has the advantages of simple structure and convenient use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention when applied to a check valve; Figure 3 This is a cross-sectional view from another direction when the present invention is applied to a check valve; Figure 4 This is a cross-sectional view of another embodiment of the present invention; Figure 5 This is a cross-sectional view from another direction in another embodiment of the present invention; Figure 6 This is a cross-sectional view from another direction in another embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of this utility model after applying a bolt-type needle valve.

[0015] In the diagram: Valve body 1, Medium channel 2, First channel 3, Second channel 4, Miniature valve 5, Sampling and sewage discharge channel 6, Plug 7, Weld neck flange 8, Blind flange 9, Octagonal ring 10, Input end 11, Output end 12, Third channel 13, Fourth channel 14, Fifth channel 15, Sixth channel 16, Seventh channel 17. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] like Figure 1As shown, a sampling and drainage structure for a valve body includes a first channel 3 that is connected at one end to a medium channel 2 inside the valve body 1, and a second channel 4 that is connected at one end to the other end of the first channel 3. The valve body 1 is provided with a miniature valve 5 for opening and closing the first channel 3 and regulating the flow rate of the medium passing through the first channel 3. The valve core of the miniature valve 5 is located at the connection between the first channel 3 and the second channel 4 and is inserted into the first channel 3. The valve body 1 is also provided with a sampling and sewage discharge channel 6, the second channel 4 is connected to the sampling and sewage discharge channel 6, and the outlet end of the sampling and sewage discharge channel 6 is also provided with a plug 7.

[0018] The above structure is applicable to various valves such as double ball valves and check valves, and is used to sample and discharge the medium inside the valve. It also has a pressure relief function. Among them, the miniature valve 5 is used to open and close the first channel 3 and regulate the flow rate of the medium discharged from the valve, while the plug 7 is used to close the sampling and discharge channel 6. It has the advantages of simple structure and convenient use.

[0019] In another embodiment, such as Figure 1 As shown, the second channel 4 is an oblique channel.

[0020] In another embodiment, such as Figure 1 As shown, the valve body 1 is a double-ball valve, and the first channel 3 connects the medium channel 2 between the two valve chambers inside the valve body 1.

[0021] In another embodiment, such as Figure 1 As shown, the miniature valve 5 is a needle valve, and the plug 7 is a weld neck flange 8 plus a blind flange 9 structure or a plug.

[0022] In another embodiment, the sealing 7 is a structure of a weld neck flange 8 plus a blind flange 9, wherein the weld neck flange 8 is welded to the valve body 1, and an octagonal ring 10 is provided at the connection between the blind flange 9 and the weld neck flange 8.

[0023] Compared to the traditional direct connection method of the blind flange 9, the above structure requires increasing the diameter of the valve body 1 in most cases to machine the process hole for connection with the blind flange 9 on the surface of the valve body 1, increasing costs and making the enlarged valve body 1 bulky and causing difficulties in subsequent installation. This new connection method uses the transition function of the weld neck flange 8 to transfer the blind flange 9, which should be directly connected to the valve body 1, to the weld neck flange 8. The absolute area of ​​the process hole required for the weld neck flange 8 to connect with the valve body 1 is small, and the connection method is welding, avoiding the presence of extra process holes on the valve body 1, which would cause the valve body 1 wall thickness or sealing performance to be substandard. It also eliminates the need to increase the diameter of the valve body 1 during manufacturing, thus avoiding increased costs. The octagonal ring 10 has extremely high sealing performance, and the welding connection method at the valve body 1 results in excellent overall sealing performance, eliminating concerns about media leakage caused by this connection method.

[0024] In another embodiment, the valve body 1 is a one-way valve.

[0025] In another embodiment, combined Figure 2 and Figure 3 As shown, the medium channel 2 includes an input terminal 11 and an output terminal 12, which are not connected. One end of the first channel 3 is connected to the input terminal 11, and the other end of the first channel 3 is connected to the output terminal 12 through a third channel 13 that is set at an inclination. It also includes a fourth channel 14, one end of which is connected to the connection between the first channel 3 and the third channel 13 via an inclined fifth channel 15, and the other end of which is connected to the second channel 4. The valve body 1 is provided with two miniature valves 5, which are respectively located at the connection points of the first channel 3, the third channel 13 and the fifth channel 15, and the connection points of the fourth channel 14 and the second channel 4.

[0026] In the above structure, the miniature valve 5 located at the connection of the first channel 3, the third channel 13 and the fifth channel 15 also serves to open and close the medium channel 2, while the miniature valve 5 located at the connection of the fourth channel 14 and the second channel 4 serves to open and close the second channel 4. At the same time, the medium channel 2 and the second channel 4 are opened, and the plug on the sampling and sewage discharge channel 6 is unscrewed to discharge sewage or take samples.

[0027] Compared to previous technical solutions, this structure avoids the drawback of the blind flange 9 being unable to take samples.

[0028] In another embodiment, combined Figure 4-6As shown, the end of the third channel 13 away from the first channel 3 is also connected to the sixth channel 16. The sixth channel 16 is connected to the output end 12 through the inclined seventh channel 17. The valve is also provided with a miniature valve 5 corresponding to the connection of the third channel 13, the sixth channel 16 and the seventh channel 17.

[0029] Compared to the previous technical solution, this structure adds a sixth channel 16, a seventh channel 17, and a micro valve 5. Thus, when the newly added micro valve 5 is in the closed state, the medium channel 2 is always in the open state, so sewage discharge and sampling can be achieved when the medium channel 2 is open, making it more convenient to use.

[0030] In another embodiment, combined Figure 4 and Figure 7 As shown, the miniature valve 5 is a threaded needle valve or a bolt-type needle valve.

Claims

1. A sampling and drainage structure for a valve body, characterized in that, It includes a first channel (3) that is connected to the medium channel (2) inside the valve body (1) at one end, and a second channel (4) that is connected to the other end of the first channel (3) at one end; The valve body (1) is provided with a miniature valve (5) for opening and closing the first channel (3) and regulating the flow rate of the medium passing through the first channel (3). The valve core of the miniature valve (5) is located at the connection between the first channel (3) and the second channel (4) and is inserted into the first channel (3). The valve body (1) is also provided with a sampling and sewage discharge channel (6), the second channel (4) is connected to the sampling and sewage discharge channel (6), and the outlet end of the sampling and sewage discharge channel (6) is also provided with a plug (7).

2. The sampling and drainage structure of the valve body as described in claim 1, characterized in that, The second channel (4) is an oblique channel.

3. The sampling and drainage structure of the valve body as described in claim 2, characterized in that, The valve body (1) is a double ball valve, and the first channel (3) connects the medium channel (2) between the two valve chambers inside the valve body (1).

4. The sampling and drainage structure of the valve body as described in claim 3, characterized in that, The micro valve (5) is a needle valve, and the plug (7) is a weld neck flange (8) plus a blind flange (9) structure or a plug.

5. The sampling and drainage structure of the valve body as described in claim 4, characterized in that, The plug (7) is a structure of weld neck flange (8) plus blind flange (9). The weld neck flange (8) is welded to the valve body (1). An octagonal ring (10) is also provided at the connection between the blind flange (9) and the weld neck flange (8).

6. The sampling and drainage structure of the valve body as described in claim 2, characterized in that, The valve body (1) is a one-way valve.

7. The sampling and drainage structure of the valve body as described in claim 6, characterized in that, The medium channel (2) includes an input end (11) and an output end (12), and the input end (11) and the output end (12) are not connected. One end of the first channel (3) is connected to the input end (11), and the other end of the first channel (3) is connected to the output end (12) through a third channel (13) that is set at an inclination. It also includes a fourth channel (14), one end of which is connected to the connection between the first channel (3) and the third channel (13) through an inclined fifth channel (15), and the other end of which is connected to the second channel (4); The valve body (1) is provided with two micro valves (5), which are respectively located at the connection points of the first channel (3), the third channel (13) and the fifth channel (15), as well as at the connection points of the fourth channel (14) and the second channel (4).

8. The sampling and drainage structure of the valve body as described in claim 7, characterized in that, The end of the third channel (13) away from the first channel (3) is also connected to the sixth channel (16). The sixth channel (16) is connected to the output end (12) through the inclined seventh channel (17). The valve body is also provided with a miniature valve (5) corresponding to the connection of the third channel (13), the sixth channel (16) and the seventh channel (17).

9. The sampling and drainage structure of the valve body as described in claim 8, characterized in that, The miniature valve (5) is a threaded needle valve or a bolt-type needle valve.

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