Dosing valve group and dosing device

Abstract

The present invention relates to a dosing valve group and a dosing device. The dosing valve group includes: a valve body, a first dosing channel and a second dosing channel are opened inside the valve body, the inlet of the first dosing channel is used to communicate with the drug storage device, the outlet of the first dosing channel is used to communicate with the inlet of the dosing pump, the inlet of the second dosing channel is used to communicate with the outlet of the dosing pump, and the outlet of the second dosing channel is used to output the medicine; a valve core assembly is installed on the valve body, and is used to control the on-off and pressure of the first dosing channel and the second dosing channel. In this way, the first dosing channel and the second dosing channel are opened in the valve body, and the valve core assembly is integrated and installed on the valve body. On the one hand, it is conducive to improving the integration, saving the required space, and facilitating transportation; on the other hand, it reduces the number of pipes and elbows, and also reduces the number of connection ports, so that it is easy to assemble, the production efficiency is high, and the risk of leakage failure is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of dosing equipment, and in particular to a dosing valve group and a dosing device. Background Art

[0002] During the water treatment process, it is necessary to add a variety of liquid agents, such as coagulants, disinfectants, etc., to the water in a quantitative manner. The type and quantity of the added liquid agents are determined according to the properties of the water and the requirements of the treatment process. The locations for adding liquid agents are different. Some need to be added to the anoxic tank, and some need to be added to the sedimentation tank. In order to achieve the addition of liquid agents, it is generally necessary to set up a dosing device in the dosing room, and use the dosing device to add liquid agents for a long time and stably.

[0003] Traditional dosing devices connect various valve bodies, instruments and other functional components through pipe fittings to form dosing pipelines. There are many pipe elbows and connection ports, which are inconvenient to assemble, have low production efficiency, are prone to leakage, have low space utilization, are large in size, and are inconvenient to transport. Summary of the invention

[0004] Based on this, it is necessary to provide a dosing valve group and a dosing device that improve the above defects, in order to address the problems that the dosing device in the prior art is inconvenient to assemble, has low production efficiency, is prone to leakage failures, has low space utilization, is large in size, and is inconvenient to transport.

[0005] A dosing valve group, comprising:

[0006] The valve body has a first dosing channel and a second dosing channel formed therein, wherein the inlet of the first dosing channel is used to communicate with the drug storage device, the outlet of the first dosing channel is used to communicate with the inlet of the dosing pump, the inlet of the second dosing channel is used to communicate with the outlet of the dosing pump, and the outlet of the second dosing channel is used to output the medicine;

[0007] The valve core assembly is installed on the valve body and is used to control the on-off and pressure of the first and second dosing channels.

[0008] In one embodiment, the dosing valve group further includes a filter, and the first dosing channel includes a first sub-channel and a second sub-channel;

[0009] The inlet of the first subchannel is used to communicate with the drug storage device, the outlet of the first subchannel is communicated with the inlet of the filter, the outlet of the filter is communicated with the inlet of the second subchannel, and the outlet of the second subchannel is used to communicate with the inlet of the drug adding pump.

[0010] In one embodiment, the valve body includes a block body and a first sub-block and a second sub-block connected to the same side of the block body, the block body, the first sub-block and the second sub-block are integrally formed, and the filter is accommodated between the first sub-block and the second sub-block;

[0011] The first sub-channel is opened in the first sub-block, the outlet of the first sub-channel passes through the side of the first sub-block facing the second sub-block and is connected to the inlet of the filter, the second sub-channel is opened in the second sub-block, the inlet of the second sub-channel passes through the side of the second sub-block facing the first sub-block and is connected to the outlet of the filter; the first dosing channel also includes a third sub-channel opened in the block body, the inlet of the third sub-channel is connected to the outlet of the second sub-channel, and the outlet of the third sub-channel is used to communicate with the inlet of the dosing pump;

[0012] The second drug adding channel is opened in the block body.

[0013] In one embodiment, the valve body is further provided with an assembly hole connected to the first sub-channel, and the valve core assembly further includes a drug inlet valve core, and the drug inlet valve core is installed in the assembly hole to control the conduction or cutoff of the first sub-channel.

[0014] In one embodiment, the valve body is further provided with a first safety channel, a second safety channel and a first mounting hole, the inlet of the second safety channel is communicated with the second drug adding channel, the outlet of the second safety channel is communicated with the first mounting hole, the inlet of the first safety channel is communicated with the first mounting hole, and the outlet of the first safety channel is communicated with the first drug adding channel;

[0015] The valve core assembly further includes a safety valve core, which is installed in the first installation hole to control the connection and disconnection between the outlet of the second safety channel and the inlet of the first safety channel.

[0016] In one embodiment, a sampling channel and a second mounting hole are further provided in the valve body, the inlet of the sampling channel is communicated with the second drug adding channel, the outlet of the sampling channel passes through the valve body, and the second mounting hole is communicated with the sampling channel;

[0017] The valve core assembly further comprises a sampling valve core, and the sampling valve core is installed in the second installation hole to control the on-off of the sampling channel.

[0018] In one embodiment, the second dosing channel includes a fourth sub-channel, a fifth sub-channel and a third mounting hole, the inlet of the fourth sub-channel is connected to the outlet of the dosing pump, the outlet of the fourth sub-channel is connected to the third mounting hole, the inlet of the fifth sub-channel is connected to the third mounting hole, and the outlet of the fifth sub-channel passes through the valve body;

[0019] The valve core assembly further includes a back-pressure valve core, which is installed in the third installation hole to adjust the pressure of the medicine entering the fifth sub-channel from the fourth sub-channel through the back-pressure valve core.

[0020] In one of the embodiments, the valve body is further provided with a fourth mounting hole communicating with the fourth sub-channel, and the fourth mounting hole is used to communicate with the damper through a first connecting pipe.

[0021] In one of the embodiments, the valve body is further provided with a fifth mounting hole communicating with the fifth sub-channel, and the fifth mounting hole is used to communicate with the pressure gauge through a second connecting pipe.

[0022] In one embodiment, the valve body is further provided with a sixth mounting hole connected to the fifth sub-channel, and the valve core assembly further includes a medicine outlet valve core, and the medicine outlet valve core is installed in the sixth mounting hole to control the opening and closing of the fifth sub-channel.

[0023] A dosing device comprises a dosing pump and a dosing valve group as described in any of the above embodiments.

[0024] The above-mentioned dosing valve group and dosing device, during the dosing operation, connect the inlet of the first dosing channel with the drug storage device through a pipeline, and connect the outlet of the second dosing channel with the area to be dosing (such as an anoxic tank, a sedimentation tank, etc.) through a pipeline. Under the pumping action of the dosing pump, the medicine output by the drug storage device passes through the first dosing channel, the dosing pump and the second dosing channel in sequence, and flows from the outlet of the second dosing channel to the area to be dosing. In addition, the valve core component is used to control the opening and closing of the first dosing channel and the second dosing channel, and to adjust the pressure of the medicine flowing through the first dosing channel and the second dosing channel, on the one hand, to avoid component failure and safety problems caused by excessive pressure of the medicine, and on the other hand, to avoid the problem of unstable outlet flow of the second dosing channel caused by unstable pressure of the medicine.

[0025] In this way, a first dosing channel and a second dosing channel are opened in the valve body, and the valve core assembly is integrated and installed on the valve body. On the one hand, it is conducive to improving the integration, saving the required space, and facilitating transportation; on the other hand, it reduces pipes and elbows, and also reduces the number of connection ports, thereby facilitating assembly, improving production efficiency, and reducing the risk of leakage failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a dosing device in one embodiment of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a dosing valve group of a dosing device in one embodiment of the present invention;

[0028] Figure 3 for Figure 2 The front view of the dosing valve group shown;

[0029] Figure 4 for Figure 2 A top view of the dosing valve assembly is shown;

[0030] Figure 5 for Figure 2 The left side view of the dosing valve group is shown;

[0031] Figure 6 for Figure 2 The front view of the valve body of the dosing valve group shown;

[0032] Figure 7 for Figure 6 A cross-sectional view of the valve body along the AA direction shown;

[0033] Figure 8 for Figure 6 A cross-sectional view of the valve body along the DD direction shown;

[0034] Fig. 9 for Figure 6 A cross-sectional view of the valve body along direction BB shown;

[0035] Fig.10 for Figure 6 A cross-sectional view of the valve body along the CC direction is shown. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] See also Figure 1 and Figure 2 An embodiment of the present invention provides a dosing device, including a dosing pump 10 and a dosing valve group.

[0043] The dosing valve group includes a valve body 20 and a valve core assembly installed on the valve body 20. A first dosing channel 21 and a second dosing channel 22 are provided inside the valve body 20. The inlet of the first dosing channel 21 is used to communicate with the drug storage device, the outlet of the first dosing channel 21 is communicated with the inlet of the dosing pump 10, the outlet of the dosing pump 10 is communicated with the inlet of the second dosing channel 22, and the outlet of the second dosing channel 22 is used to output the medicine. In other words, the medicine output by the drug storage device enters the first dosing channel 21 from the inlet of the first dosing channel 21, and enters the second dosing channel 22 from the inlet of the second dosing channel 22 under the pumping action of the dosing pump 10, and then outputs from the outlet of the second dosing channel 22, thereby achieving dosing.

[0044] The valve core assembly is installed on the valve body 20 to control the on / off and pressure of the first dosing channel 21 and / or the second dosing channel 22 so that the medicine enters the second dosing channel 22 from the first dosing channel 21 and is evenly output from the outlet of the second dosing channel 22.

[0045] In the dosing operation, the above-mentioned dosing device connects the inlet of the first dosing channel 21 with the drug storage device through a pipeline, and connects the outlet of the second dosing channel 22 with the area to be dosing (such as an anoxic tank, a sedimentation tank, etc.) through a pipeline. Under the pumping action of the dosing pump 10, the medicine output by the drug storage device passes through the first dosing channel 21, the dosing pump 10 and the second dosing channel 22 in sequence, and flows to the area to be dosing from the outlet of the second dosing channel 22. In addition, the valve core component is used to control the opening and closing of the first dosing channel 21 and the second dosing channel 22, and to adjust the pressure of the medicine flowing through the first dosing channel 21 and the second dosing channel 22, on the one hand, to avoid component failure and safety problems caused by excessive pressure of the medicine, and on the other hand, to avoid the problem of unstable outlet flow of the second dosing channel 22 caused by unstable pressure of the medicine.

[0046] In this way, a first dosing channel 21 and a second dosing channel 22 are opened in the valve body 20, and the valve core assembly is integrated and installed on the valve body 20. On the one hand, it is beneficial to improve the integration, save the required space, and facilitate transportation; on the other hand, it reduces pipes and elbows, and also reduces the number of connection ports, thereby facilitating assembly, improving production efficiency, and reducing the risk of leakage failures.

[0047] Preferably, the dosing pump 10 may be a metering pump, which can not only provide power to make the medicine flow from the first dosing channel 21 to the second dosing channel 22, but also meter the output medicine to make the medicine flow rate more stable.

[0048] See also Figure 1 , Figure 6 and Figure 7 As shown, in the embodiment of the present invention, the dosing valve group further includes a filter 40, and the first dosing channel 21 includes a first sub-channel 211 and a second sub-channel 212. The inlet of the first sub-channel 211 (i.e., the inlet of the first dosing channel 21) is used to communicate with the drug storage device, and the outlet of the first sub-channel 211 is communicated with the inlet of the filter 40. The outlet of the filter 40 is communicated with the inlet of the second sub-channel 212, and the outlet of the second sub-channel 212 is communicated with the inlet of the dosing pump 10. In this way, the medicine output by the drug storage device enters the first sub-channel 211 from the inlet of the first sub-channel 211, and then enters the filter 40 from the outlet of the first sub-channel 211, and then the medicine filtered by the filter 40 enters the second sub-channel 212 from the inlet of the second sub-channel 212. The medicine in the second sub-channel 212 enters the second dosing channel 22 under the pumping action of the dosing pump 10, and then flows from the outlet of the second dosing channel 22 to the area to be dosed. Preferably, the filter 40 can be a Y-type filter.

[0049] See also Figure 4 , Figures 6 to 10As shown, as shown, specifically in the embodiment, the valve body 20 includes a block body 27 and a first sub-block 28 and a second sub-block 29 connected to the same side of the block body 27. The block body 27, the first sub-block 28 and the second sub-block 29 are integrally formed, and the second dosing channel 22 is opened in the block body 27. The filter 40 is accommodated between the first sub-block 28 and the second sub-block 29. The first sub-channel 211 is opened in the first sub-block 28, and the outlet of the first sub-channel 211 passes through the side of the first sub-block 28 facing the second sub-block 29, and is connected to the inlet of the filter 40. The second sub-channel 212 is opened in the second sub-block 29, and the inlet of the second sub-channel 212 passes through the side of the second sub-block 29 facing the first sub-block 28, and is connected to the outlet of the filter 40. The first dosing channel 21 also includes a third sub-channel 213 opened in the block body 27, the inlet of the third sub-channel 213 is connected to the outlet of the second sub-channel 212, and the outlet of the third sub-channel 213 (i.e., the outlet of the first dosing channel 21) is connected to the inlet of the dosing pump 10. In this way, the first sub-block 28 and the second sub-block 29 are used to respectively open the first sub-channel 211 and the second sub-channel 212, and the filter 40 is arranged between the first sub-channel 211 and the second sub-channel 212, so as to facilitate the processing of the first sub-channel 211 and the second sub-channel 212, and facilitate the assembly of the filter 40, thereby further improving the assembly efficiency of the dosing device.

[0050] Specifically in the embodiment, the valve body 20 is further provided with an assembly hole 51 connected to the first sub-channel 211. The valve core assembly includes a medicine inlet valve core 50, which is installed in the assembly hole 51, so that the first sub-channel 211 is controlled to be turned on or off by the medicine inlet valve core 50. Further, the assembly hole 51 is arranged close to the inlet of the first sub-channel 211. In this way, when it is necessary to perform a dosing operation, the medicine inlet valve core 50 is opened, so that the medicine output by the medicine storage device can pass through the first sub-channel 211 under the pumping action of the dosing pump 10. When it is not necessary to perform a dosing operation, the medicine inlet valve core 50 is closed, so as to prevent the medicine output by the medicine storage device from passing through the first sub-channel 211.

[0051] It should be noted that the drug inlet valve includes a drug inlet valve seat and a drug inlet valve core 50 mounted on the drug inlet valve seat. In this embodiment, the portion of the valve body 20 having the assembly hole 51 is equivalent to the drug inlet valve seat, so that when the drug inlet valve core 50 is mounted in the assembly hole 51, a complete drug inlet valve is formed.

[0052] In the embodiment of the present invention, the valve body 20 is further provided with a first safety channel 23, a second safety channel 24 and a first mounting hole 311. The inlet of the second safety channel 24 is communicated with the second dosing channel 22, and the outlet of the second safety channel 24 is communicated with the first mounting hole 311. The inlet of the first safety channel 23 is communicated with the first mounting hole 311, and the outlet of the first safety channel 23 is communicated with the first dosing channel 21.

[0053] The valve core assembly further includes a safety valve core 31 , which is installed in the first installation hole 311 to control the connection between the outlet of the second safety channel 24 and the inlet of the first safety channel 23 .

[0054] In this way, the safety valve core 31 is used to protect the dosing pump 10 to avoid damage to the dosing pump 10 when the pressure of the dosing agent is too high. When the pressure of the agent in the second dosing channel 22 reaches the safety pressure value, the safety valve core 31 automatically opens, so that the inlet and outlet of the dosing pump 10 are directly connected, and the agent output from the outlet of the dosing pump 10 to the second dosing channel 22 can flow back to the first dosing channel 21 through the second safety channel 24 and the first safety channel 23, and then enter the dosing pump 10 again from the inlet of the dosing pump 10 to reduce the pressure of the second dosing channel 22 and avoid damage to the dosing pump 10. When the pressure of the agent in the second dosing channel 22 is less than the safety pressure value, the safety valve core 31 automatically closes, so that the first safety channel 23 and the second safety channel 24 are cut off.

[0055] It should be noted that the safety valve includes a safety valve seat and a safety valve core 31 installed on the safety valve seat. In this embodiment, the portion of the valve body 20 having the first mounting hole 311 is equivalent to the safety valve seat, so that when the safety valve core 31 is installed in the first mounting hole 311, a complete safety valve is formed.

[0056] Specifically in the embodiment, a sampling channel 25 and a second mounting hole 61 are also provided in the valve body 20, the inlet of the sampling channel 25 is communicated with the second dosing channel 22, the outlet of the sampling channel 25 passes through the valve body 20, and the second mounting hole 61 is communicated with the sampling channel 25. The valve core assembly also includes a sampling valve core 60, and the sampling valve core 60 is installed in the second mounting hole 61 to control the on-off of the sampling channel 25. In this way, the medicine in the second dosing channel 22 can be discharged from the outlet of the sampling channel 25 by opening the sampling valve core 60, so as to extract the medicine from the sampling channel 25, and then detect various indicators of the medicine. For example, when the medicine is a solid-liquid mixture, a small amount of medicine can be obtained by opening the sampling valve core 60 to detect whether it is evenly mixed. Secondly, the sampling valve core 60 can also be used as a maintenance valve. When maintenance is required, the sampling valve core 60 can be opened to drain the reagents in the first dosing channel 21 and the second dosing channel 22. In addition, the sampling valve core 60 can also be used as a pressure relief valve. When the second dosing channel 22 needs to be depressurized, the sampling valve core 60 is opened to achieve pressure relief.

[0057] It should be noted that the sampling valve includes a sampling valve seat and a sampling valve core 60 mounted on the sampling valve seat. In this embodiment, the portion of the valve body 20 having the second mounting hole 61 is equivalent to the sampling valve seat, so that when the sampling valve core 60 is mounted in the second mounting hole 61, a complete sampling valve is formed.

[0058] See also Figure 1 , Figures 6 to 10 As shown, in the embodiment of the present invention, the second dosing channel 22 includes a fourth sub-channel 221, a fifth sub-channel 222 and a third mounting hole 321. The inlet of the fourth sub-channel 221 (i.e., the inlet of the second dosing channel 22) is connected to the dosing pump 10, and the outlet of the fourth sub-channel 221 is connected to the third mounting hole 321. The inlet of the fifth sub-channel 222 is connected to the third mounting hole 321, and the outlet of the fifth sub-channel 222 (i.e., the outlet of the second dosing channel 22) passes through the valve body 20 and is used to connect to the area to be dosing.

[0059] The valve core assembly also includes a back pressure valve core 32, which is installed in the third installation hole 321 to adjust the pressure of the medicine entering the fifth sub-channel 222 from the fourth sub-channel 221 through the back pressure valve core 32. In this way, the medicine output from the outlet of the first dosing channel 21 enters the fourth sub-channel 221 under the pumping action of the dosing pump 10, and the medicine in the fourth sub-channel 221 enters the fifth sub-channel 222 through the back pressure valve core 32, and then flows from the outlet of the fifth sub-channel 222 to the area to be dosing. The setting of the back pressure valve core 32 makes the pressure of the medicine more stable and reduces the vibration caused by the flow of the medicine.

[0060] It should be noted that the back pressure valve includes a back pressure valve seat and a back pressure valve core 32 installed on the back pressure valve seat. In this embodiment, the portion of the valve body 20 having the third mounting hole 321 is equivalent to the back pressure valve seat, so that when the back pressure valve core 32 is installed in the third mounting hole 321, a complete back pressure valve is formed, which makes the pressure of the medicine more stable and reduces the vibration caused by the flow of the medicine.

[0061] Specifically in the embodiment, the valve body 20 is further provided with a fourth mounting hole 331 communicating with the fourth sub-channel 221. The dosing device further comprises a damper 33, which is communicated with the fourth mounting hole 331 through a first connecting pipe, so that the medicine entering the fourth sub-channel 221 flows out from the outlet of the fourth sub-channel 221 after passing through the damper 33, and the damper 33 is used to eliminate the pressure pulsation or flow pulsation of the medicine, thereby stabilizing the pressure and flow of the medicine, eliminating vibration, protecting downstream instruments and equipment, and increasing the volumetric efficiency of the pump. Optionally, the damper 33 can be a diaphragm damper.

[0062] It should be noted that the use of the back pressure valve core 32 and the damper 33 together is beneficial to reduce the harm of water hammer to the system, reduce the peak value of flow rate fluctuation, protect pipelines, joints, etc. from the impact of pressure fluctuations, and ensure the stability of the liquid flow rate of the dosing pump 10.

[0063] Specifically in the embodiment, the valve body 20 is further provided with a fifth mounting hole 341 connected to the fifth sub-channel 222. The dosing device further includes a pressure gauge 34, which is connected to the fifth mounting hole 341 through a second connecting pipe. In this way, the pressure gauge 34 is used to measure the pressure of the medicine in the fifth sub-channel 222, and the system pressure is monitored in real time.

[0064] Specifically in the embodiment, the valve body 20 is further provided with a sixth mounting hole 71 connected to the fifth sub-channel 222. The valve core assembly further includes a medicine discharging valve core 70, which is mounted on the sixth mounting hole 71, so that the medicine discharging valve core 70 is used to control the conduction or cutoff of the fifth sub-channel 222 to control the outlet of the fifth sub-channel 222 to output the medicine. It can be understood that the sixth mounting hole 71 is located between the outlet of the fifth sub-channel 222 and the fifth mounting hole 341. In this way, when it is necessary to add medicine to the area to be added, the medicine discharging valve core 70 is opened, so that the medicine in the fifth sub-channel 222 can flow to the area to be added through the outlet of the fifth sub-channel 222. When it is not necessary to add medicine to the area to be added, the medicine discharging valve core 70 is closed, thereby preventing the medicine in the fifth sub-channel 222 from flowing out of the outlet of the fifth sub-channel 222.

[0065] It should be noted that the medicine dispensing valve includes a medicine dispensing valve seat and a medicine dispensing valve core 70 installed on the medicine dispensing valve seat. In this embodiment, the portion of the valve body 20 having the sixth mounting hole 71 is equivalent to the medicine dispensing valve seat, so that when the medicine dispensing valve core 70 is installed in the sixth mounting hole 71, a complete medicine dispensing valve is formed.

[0066] It should also be noted that in actual use, multiple dosing devices can be equipped, and the inlet of the first dosing channel 21 of the valve body 20 in each dosing device is connected to the drug storage device, that is, multiple dosing devices are used to perform dosing operations at the same time. Furthermore, a part of the multiple dosing devices is a working dosing device, and another part is a standby dosing device. The working dosing device refers to a dosing device that is performing a dosing operation. The standby dosing device refers to a dosing device that replaces the working dosing device to perform the dosing operation when the working dosing device cannot perform the dosing operation due to a malfunction or maintenance.

[0067] The dosing process of the dosing device of the present invention is described below with reference to the accompanying drawings:

[0068] First, open the dosing valve core 50 and the drug outlet valve core 70, and turn on the dosing pump 10. At this time, under the pumping action of the dosing pump 10, the medicine in the medicine storage device passes through the first sub-channel 211, the second sub-channel 212, the third sub-channel 213, the dosing pump 10 in sequence, and enters the fourth sub-channel 221 of the second dosing channel 22. The medicine entering the fourth sub-channel 221 passes through the damper 33, the back pressure valve core 32, the pressure gauge 34 in sequence, and flows from the outlet of the fifth sub-channel 222 to the area to be dosing.

[0069] When the dosing is completed, the dosing pump 10 stops pumping and closes the dosing valve core 50 and the discharge valve core 70 .

[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A dosing valve group, characterized in that: include: The valve body (20) has a first dosing channel (21) and a second dosing channel (22) formed therein, wherein the inlet of the first dosing channel (21) is used to communicate with the drug storage device, the outlet of the first dosing channel (21) is communicated with the inlet of the dosing pump (10), the inlet of the second dosing channel (22) is used to communicate with the outlet of the dosing pump (10), and the outlet of the second dosing channel (22) is used to output the medicine; and A valve core assembly, mounted on the valve body (20), for controlling the on / off and pressure of the first dosing channel (21) and the second dosing channel (22); The drug adding valve assembly further comprises a filter (40); the first drug adding channel (21) comprises a first sub-channel (211) and a second sub-channel (212); The inlet of the first sub-channel (211) is used to communicate with the drug storage device, the outlet of the first sub-channel (211) is communicated with the inlet of the filter (40), the outlet of the filter (40) is communicated with the inlet of the second sub-channel (212), and the outlet of the second sub-channel (212) is used to communicate with the inlet of the drug adding pump (10); The valve body (20) comprises a block body (27) and a first sub-block (28) and a second sub-block (29) connected to the same side of the block body (27); the block body (27), the first sub-block (28) and the second sub-block (29) are integrally formed; and the filter (40) is accommodated between the first sub-block (28) and the second sub-block (29); The first sub-channel (211) is opened in the first sub-block (28), the outlet of the first sub-channel (211) passes through the side of the first sub-block (28) facing the second sub-block (29), and is communicated with the inlet of the filter (40); the second sub-channel (212) is opened in the second sub-block (29), the inlet of the second sub-channel (212) passes through the side of the second sub-block (29) facing the first sub-block (28), and is communicated with the outlet of the filter (40); the first dosing channel (21) further comprises a third sub-channel (213) opened in the block body (27), the inlet of the third sub-channel (213) is communicated with the outlet of the second sub-channel (212), and the outlet of the third sub-channel (213) is used to communicate with the inlet of the dosing pump (10); The second drug adding channel (22) is opened in the block body (27); The valve body (20) is further provided with a first safety channel (23), a second safety channel (24) and a first mounting hole (311); the inlet of the second safety channel (24) is communicated with the second drug adding channel (22); the outlet of the second safety channel (24) is communicated with the first mounting hole (311); the inlet of the first safety channel (23) is communicated with the first mounting hole (311); and the outlet of the first safety channel (23) is communicated with the first drug adding channel (21); The valve core assembly further comprises a safety valve core (31), and the safety valve core (31) is installed in the first installation hole (311) to control the connection and disconnection between the outlet of the second safety channel (24) and the inlet of the first safety channel (23).

2. The dosing valve assembly according to claim 1, characterized in that: The valve body (20) is further provided with an assembly hole (51) communicating with the first sub-channel (211); the valve core assembly comprises a drug inlet valve core (50); the drug inlet valve core (50) is mounted in the assembly hole (51) to control the conduction or blocking of the first sub-channel (211).

3. The dosing valve assembly according to claim 1, characterized in that: The valve body (20) is further provided with a sampling channel (25) and a second mounting hole (61); the inlet of the sampling channel (25) is communicated with the second drug adding channel (22); the outlet of the sampling channel (25) passes through the valve body (20); and the second mounting hole (61) is communicated with the sampling channel (25); The valve core assembly further comprises a sampling valve core (60), wherein the sampling valve core (60) is installed in the second installation hole (61) and is used to control the on-off of the sampling channel (25).

4. The dosing valve assembly according to claim 1, characterized in that: The second dosing channel (22) comprises a fourth sub-channel (221), a fifth sub-channel (222) and a third mounting hole (321); the inlet of the fourth sub-channel (221) is connected to the outlet of the dosing pump (10); the outlet of the fourth sub-channel (221) is connected to the third mounting hole (321); the inlet of the fifth sub-channel (222) is connected to the third mounting hole (321); and the outlet of the fifth sub-channel (222) passes through the valve body (20); The valve core assembly also includes a back pressure valve core (32), which is installed in the third installation hole (321) to adjust the pressure of the medicine entering the fifth sub-channel (222) from the fourth sub-channel (221) through the back pressure valve core (32).

5. The dosing valve assembly according to claim 4, characterized in that: The valve body (20) is further provided with a fourth mounting hole (331) communicating with the fourth sub-channel (221), and the fourth mounting hole (331) is used to communicate with the damper (33) through the first connecting pipe.

6. The dosing valve assembly according to claim 4, characterized in that: The valve body (20) is further provided with a fifth mounting hole (341) communicating with the fifth sub-channel (222), and the fifth mounting hole (341) is used to communicate with the pressure gauge (34) through a second connecting pipe.

7. The dosing valve assembly according to claim 4, characterized in that: The valve body (20) is further provided with a sixth mounting hole (71) communicating with the fifth sub-channel (222), and the valve core assembly further comprises a medicine dispensing valve core (70), wherein the medicine dispensing valve core (70) is mounted on the sixth mounting hole (71) to control the on-off of the fifth sub-channel (222).

8. A dosing device, characterized in that: It comprises a dosing pump (10) and a dosing valve assembly as claimed in any one of claims 1 to 7.

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