Adjustable valve group

Abstract

The utility model discloses an adjustable and controllable valve group which comprises a valve body, ball cores, valve rods and valve seats, each ball core, each valve rod and each valve seat are matched with each other to form a group of cut-off structures, the two groups of cut-off structures are connected in series in a channel, and a sampling channel is arranged between the two groups of cut-off structures. The valve body is provided with a cleaning channel communicated with the sampling channel, the opening of the cleaning channel and the opening of the sampling channel are both arranged between the two sets of cut-off structures, and when the two sets of cut-off connectors are both cut off, the sampling channel is cleaned in the mode that a cleaning medium is injected through the cleaning channel and the sampling channel is discharged. The cleaning channel communicated with the sampling channel is arranged on the valve body, and the one-way valve only capable of being opened inwards is arranged at the inlet of the cleaning channel, so that the sampling channel can be cleaned and maintained by injecting a cleaning medium, and the beneficial effects of pure sampling operation and sampling channel protection are achieved.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to an adjustable valve group. Background Art

[0002] In the technical field of valves, a multi-functional valve group integrates various functions such as chemical injection, flow control, pressure control, sewage cleaning, and sampling. It is an essential important product for high-pressure pipeline devices and centralized control instruments. A double block and bleed valve consists of several ball valves and needle valves in combination. The ball valve has functions such as truncation, quick opening and closing, and small flow resistance. The needle valve has functions of flow regulation and truncation, and is very convenient for discharging, sampling, pressure measurement, and branch configuration.

[0003] In the prior art, when the valve group is used in a working pipeline with a sampling requirement, the sampling channel is usually only opened during sampling. However, after sampling is completed and before the next sampling, the medium in the entire sampling channel does not flow. Over time, the internal medium is prone to deposition and deterioration, causing pollution and waste to the next sampling, and the impurities deposited inside are not easy to clean due to adhesion. Therefore, there is room for improvement. Summary of the Invention

[0004] In view of the above problems, this application proposes an adjustable valve group. By providing a cleaning channel connected to the sampling channel on the valve body and installing a check valve that can only open inward at the inlet of the cleaning channel, the sampling channel can be cleaned and maintained by injecting a cleaning medium, achieving the beneficial effects of pure sampling operation and protecting the sampling channel. The adjustable valve group is specifically implemented through the following technical solutions:

[0005] An adjustable valve group includes: a valve body, a ball core, a valve stem, and a valve seat. A channel for the medium to flow through is provided inside the valve body. The ball core is disposed in the channel inside the valve body. The inner end of the valve stem is drivingly connected to the ball core. The valve seat is disposed in the channel and abuts against the ball core to form a seal. The ball core, valve stem, and valve seat are all provided in two. Each set of the ball core, valve stem, and valve seat is mutually cooperated to form a set of cutoff structures, and there are two sets. And the two sets of cutoff structures are connected in series in the channel. A sampling channel is provided between the two sets of cutoff structures. A cleaning channel communicating with the sampling channel is opened on the valve body. The openings of the cleaning channel and the sampling channel are both disposed between the two sets of cutoff structures. When both sets of cutoff interfaces are closed, the sampling channel is cleaned by injecting a cleaning medium through the cleaning channel and discharging it from the sampling channel.

[0006] Further setting: The cleaning channel includes a water inlet, and a one-way valve is arranged at the position of the water inlet. The one-way valve only allows the medium to enter from the water inlet, in the flowing direction towards the sampling channel. Through this setting, the reverse flow of the medium in the cleaning channel is prevented, the basic cleaning function is realized, and pollution is avoided.

[0007] Further setting: The one-way valve includes a sleeve and a plug. Both the sleeve and the plug are provided with through-flow channels. The sleeve is sleeved on the outer periphery of the plug, and an activity cavity is formed between the sleeve and the plug. The activity cavity communicates with the cleaning channel. A sealing ball and a spring are further arranged in the activity cavity. The outer end of the spring presses the sealing ball against the flow channel of the sleeve to block the sleeve, and the inner end of the spring abuts against the plug. Through this setting, the one-way valve is convenient to disassemble, and the internal parts are also convenient to replace and maintain, and the overall service life is longer.

[0008] Further setting: A limiting convex part is arranged at the inner end of the plug corresponding to the position of the spring, and the inner end of the spring is sleeved on the outer periphery of the limiting convex part to realize limiting. Through this setting, the position of the spring is further limited, and the overall structure is more stable and reliable.

[0009] Further setting: A limiting ring groove is arranged on the outer periphery of the plug, and a sealing ring is arranged in the limiting ring groove. Through this setting, the sealing performance between the plug and the water inlet on the valve body is improved, and the overall stability is enhanced.

[0010] Further setting: A sealing gasket is arranged at the connection between the sleeve and the plug. Through this setting, the sealing performance between the plug and the water inlet on the valve body is improved, and the overall stability is enhanced.

[0011] In summary, for the adjustable valve group, by arranging a cleaning channel communicating with the sampling channel on the valve body and arranging a one-way valve that can only open inward at the inlet of the cleaning channel, the sampling channel can be cleaned and maintained by injecting a cleaning medium, achieving the beneficial effects of pure sampling operation and protecting the sampling channel. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a front cross-sectional view of the adjustable valve group provided by the embodiment of the present application;

[0014] Figure 2 The adjustable valve group provided by the embodiment of the present application Figure 1 The enlarged view of part A in

[0015] Among them, each reference numeral in the figure:

[0016] 1, valve body; 2, ball core; 3, valve stem; 4, valve seat; 5, channel; 6, cut-off structure; 7, sampling channel; 8, cleaning channel; 9, water inlet; 10, check valve; 11, sleeve; 12, plug; 13, flow channel; 14, movable cavity; 15, sealing ball; 16, spring; 17, limiting convex part; 18, limiting ring groove; 19, sealing ring; 20, sealing gasket. Specific embodiments

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0018] The appearance of the above-mentioned words in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0019] The present application will be further described below in conjunction with the drawings and specific embodiments:

[0020] Please refer to Figures 1 to 2 together, an adjustable valve group includes: a valve body 1, a ball core 2, a valve stem 3 and a valve seat 4. A channel 5 for the medium to flow through is provided in the valve body 1. The ball core 2 is arranged in the channel 5 inside the valve body 1. The inner end of the valve stem 3 is in transmission connection with the ball core 2. The valve seat 4 is arranged in the channel 5 and abuts against the ball core 2 to form a seal. The ball core 2, the valve stem 3 and the valve seat 4 are all provided in two. Each set of the ball core 2, the valve stem 3 and the valve seat 4 is cooperatively arranged as a set of cut-off structure 6, and there are two sets. And the two sets of cut-off structures 6 are connected in series in the channel 5. A sampling channel 7 is provided between the two sets of cut-off structures 6. A cleaning channel 8 communicating with the sampling channel 7 is opened on the valve body 1. The openings of the cleaning channel 8 and the sampling channel 7 are both arranged between the two sets of cut-off structures 6. When both sets of cut-off interfaces are cut off, the sampling channel 7 is cleaned by injecting a cleaning medium through the cleaning channel 8 and discharging it through the sampling channel 7.

[0021] Please refer to Figure 1 And Figure 2, in this embodiment, the cleaning channel 8 includes a water inlet 9, and a check valve 10 is arranged at the position of the water inlet 9. The check valve 10 only allows the medium to enter from the water inlet 9 in the flowing direction towards the sampling channel 7. It should be noted that during use, first adjust the two sets of the cut-off structures 6 to a closed state, and then inject pure water into the water inlet 9 so that the pure water flows through the cleaning channel 8 and is injected into the sampling channel 7, and finally discharged through the outlet of the sampling channel 7 to clean the sampling channel 7. Increasing the pressure of the injected pure water can better improve the cleaning effect. During use, in order to facilitate the connection between the water inlet 9 and the water source, the water inlet 9 is usually set as a conventional quick connector, which can be conveniently connected to or disassembled from the water source; the check valve 10 includes a sleeve 11 and a plug 12. Both the sleeve 11 and the plug 12 are provided with a through-flow channel 13. The sleeve 11 is sleeved on the outer periphery of the plug 12, and an activity cavity 14 is formed between the sleeve 11 and the plug 12. The activity cavity 14 communicates with the cleaning channel 8. A sealing ball 15 and a spring 16 are further arranged in the activity cavity 14. The outer end of the spring 16 presses the sealing ball 15 against the flow channel 13 of the sleeve 11 to block the sleeve 11, and the inner end of the spring 16 abuts against the plug 12; a limiting convex portion 17 is arranged at the inner end of the plug 12 corresponding to the position of the spring 16, and the inner end of the spring 16 is sleeved on the outer periphery of the limiting convex portion 17 to achieve limitation; a limiting ring groove 18 is arranged on the outer periphery of the plug 12, and a sealing ring 19 is arranged in the limiting ring groove 18; a sealing gasket 20 is arranged at the connection between the sleeve 11 and the plug 12.

[0022] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An adjustable valve group, comprising: A valve body (1), a ball core (2), a valve stem (3) and a valve seat (4), wherein the valve body (1) is provided with a channel (5) for medium circulation, the ball core (2) is arranged in the channel (5) inside the valve body (1), the inner end of the valve stem (3) is drivingly connected to the ball core (2), the valve seat (4) is arranged in the channel (5) and abuts against the ball core (2) to form a seal, the ball core (2), the valve stem (3) and the valve seat (4) are each provided in pairs, and each of the ball core (2), the valve stem (3) and the valve seat (4) cooperates with each other to form a set of cut-off structures ( 6), two groups are provided, and the two groups of the cut-off structures (6) are connected in series in the channel (5), characterized in that: a sampling channel (7) is provided between the two groups of the cut-off structures (6), a cleaning channel (8) communicating with the sampling channel (7) is opened on the valve body (1), and the openings of the cleaning channel (8) and the sampling channel (7) are both provided between the two groups of the cut-off structures (6), and when the two groups of the cut-off interfaces are both cut off, the cleaning medium is injected through the cleaning channel (8), and the sampling channel (7) is discharged to clean the sampling channel (7).

2. The adjustable valve group according to claim 1, characterized in that The cleaning channel (8) comprises a water inlet (9), and a one-way valve (10) is arranged at the position of the water inlet (9). The one-way valve (10) only allows the medium to enter from the water inlet (9) in the flow direction toward the sampling channel (7).

3. The adjustable valve group according to claim 2, characterized in that The one-way valve (10) comprises a sleeve (11) and a plug (12), wherein the sleeve (11) and the plug (12) are both provided with a flow passage (13) which is interlinked with each other, the sleeve (11) is sleeved on the outer periphery of the plug (12), and an active chamber (14) is formed between the sleeve (11) and the plug (12), wherein the active chamber (14) is communicated with the cleaning passage (8), and a sealing ball (15) and a spring (16) are further provided in the active chamber (14), wherein the outer end of the spring (16) presses the sealing ball (15) against the flow passage (13) of the sleeve (11) to block the sleeve (11), and the inner end of the spring (16) presses against the plug (12).

4. The adjustable valve group according to claim 3, characterized in that A limiting protrusion (17) is arranged at the inner end of the plug (12) corresponding to the position of the spring (16), and the inner end of the spring (16) is sleeved on the outer periphery of the limiting protrusion (17) to achieve limiting.

5. The adjustable valve group according to claim 3, characterized in that A limiting ring groove (18) is arranged on the outer periphery of the plug (12), and a sealing ring (19) is arranged in the limiting ring groove (18).

6. The adjustable valve group according to claim 3, characterized in that A sealing gasket (20) is provided at the connection between the sleeve (11) and the plug (12).

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