Metering distribution valve, liquid material quantitative metering discharging method and application

Abstract

The invention discloses a metering distribution valve. The metering distribution valve comprises a valve body. The valve body main body is a main part of the metering distribution valve and is used for controlling and implementing feeding and discharging of the metering distribution valve; the valve body main body is provided with a feeding port and a valve body feeding flow channel and is connected with an external feeding pipeline, and a liquid material enters the valve body main body from the outside through the feeding port and the valve body feeding flow channel; the valve body main body comprises an electromagnetic valve, a first material channel, a second material channel and one or more mutually independent closed cavities; the electromagnetic valve controls the flow direction of liquid entering the valve body through opening and closing. The first material channel and the second material channel are connected with the valve body feeding runner through the electromagnetic valve; and the first material channel and the second material channel are both connected with the closed cavity. The invention further discloses a liquid material quantitative metering method and application.

Description

Technical Field

[0001] The present invention belongs to the technical field of metering and dispensing equipment, and relates to a metering and dispensing valve, a method for quantitatively metering and discharging liquid materials, and an application thereof. Background Art

[0002] Existing metering valves on the market include progressive metering valves, dual-line metering valves, single-line metering valves, gear or plunger metering devices combined with solenoid valves (or other switching valves) for use, and pneumatic single-line metering valves, etc. in different forms, all of which have different disadvantages and deficiencies. For example, the outlets of progressive metering valves are highly correlated. If one outlet is blocked, the entire metering valve or the entire system will not work, and it is not easy to find the blockage point; the dual-line dispenser is related to at least two points, and double pipelines and pressure sensors need to be arranged to work; the single-line type needs to relieve the pipeline pressure to work; the method of gear flowmeter or plunger metering valve combined with solenoid valve (or other switching valves) has defects such as high installation requirements, large installation space, many pipelines, high cost, and ugly appearance, and they are all single-line; the pneumatic plunger type combined with electromagnetic pneumatic valve can only be a single-line metering valve, with disadvantages such as large installation space.

[0003] Specifically,

[0004] 1. Single-line metering valve;

[0005] The feed ports of each metering valve are all connected to a single pipeline and are interconnected. After each pressurization, the pressure needs to be relieved before discharging. Since the viscosity of the fluid changes greatly with temperature, the relief pressure changes with temperature, and it needs to be adjusted frequently. If the pressure relief is not complete, the discharging will be inaccurate, and separate control is required. It is easy to get stuck and an additional filter needs to be configured.

[0006] 2. Progressive metering valve;

[0007] The outlets discharge materials in sequence. If one outlet is blocked, the entire system will not work, and it is very difficult to detect the specific blocked outlet. Separate control is required. It is easy to get stuck and an additional filter needs to be configured.

[0008] 3. Dual-line metering valve

[0009] One plunger corresponds to two outlets, at least one outlet is associated. Two rows of pipelines need to be arranged to achieve alternating pressurization and pressure relief, and a reversing valve and a pressure sensor need to be configured to obtain the pressure relief channel and the reversing pressure point. The system structure is complex, separate control is required, the cost is high, and it is easy to get stuck and an additional filter needs to be configured separately.

[0010] 4. Progressive (or plunger type) metering valve + solenoid valve (pneumatic or hydraulic switching valve);

[0011] One metering valve corresponds to all outlets. If it breaks down, the whole system fails. Only one outlet can discharge materials at a time. Moreover, if there is a leakage point in the feed pipeline or a certain solenoid valve fails, the whole system will fail.

[0012] 5. Gear (baffle or other structure) flowmeter + solenoid valve (pneumatic or hydraulic switch valve);

[0013] One metering valve corresponds to one solenoid valve and requires separate control. It has large installation dimensions and many pipelines. It needs separate control. It is mostly applicable to working conditions with low pressure and is prone to jamming, so a filter needs to be separately configured.

[0014] 6. Plunger metering valve + electromagnetic gas source switch valve;

[0015] One metering valve corresponds to one electromagnetic gas source valve. It has large installation dimensions and many pipelines. It needs separate control and is prone to jamming, so a filter needs to be separately configured. Summary of the Invention

[0016] In order to solve the deficiencies of the existing technology, the purpose of the present invention is to provide a metering distribution valve, a method for quantitatively metering and discharging liquid materials, and an application.

[0017] Compared with the advantages and disadvantages of various existing products in the market, the present invention effectively solves the problems of mutual correlation among various channels, complex structure, difficult maintenance, unstable operation, difficult troubleshooting, or inability to withstand high pressure, etc.

[0018] The present invention provides a metering distribution valve, which includes a valve body main body, a pressure sensor, a discharge pipeline extending outward from the valve body main body, and a connecting sleeve fixedly connected to the valve body main body.

[0019] The valve body main body is the main part of the metering distribution valve and is the installation carrier of each relevant part, completing the control and implementation of the feeding and discharging of the metering distribution valve.

[0020] The valve body main body is provided with a feed inlet and a valve body feed flow channel, which are connected to the external feed pipeline. Liquid materials enter the valve body main body from the outside through the feed inlet and the valve body feed flow channel.

[0021] The interior of the valve body main body includes a solenoid valve, a dedicated controller, a first material channel, a second material channel, and one or more independent closed cavities.

[0022] The solenoid valve controls the flow direction of the liquid entering the valve body main body by opening and closing; specifically, when the valve between the valve body feed channel and the second channel is opened and the valves between the first channel and the second channel and between the first channel and the valve body feed channel are closed, the liquid material entering the valve body main body flows from the valve body feed channel into the second channel; when the valve between the first channel and the second channel is opened and the valves between the first channel, the second channel and the valve body feed channel are closed, the liquid entering the valve body main body can flow from the second channel into the first channel, and / or the second chamber of the metering cavity separated by the metering plunger flows into the first chamber of the metering cavity separated by the metering plunger through the flow path switching and compensation plunger unit, thereby completing the material exchange between the first chamber and the second chamber separated by the metering plunger; specifically, a small part of the liquid material entering the valve body main body can flow from the second channel into the first channel, and most of the liquid material flows from the second chamber of the metering cavity separated by the metering plunger into the first chamber of the metering cavity separated by the metering plunger through the flow path switching and compensation plunger unit.

[0023] The first channel and the second channel are connected to the valve body feed channel through the solenoid valve; both the first channel and the second channel are connected to the closed cavity.

[0024] The closed cavity further includes a damping check valve, a channel check valve, a closed cavity, and a flow path switching and compensation plunger unit; the damping check valve and the channel check valve can be of the same or different structures as long as they can cut off and allow the liquid to flow unidirectionally.

[0025] The damping check valve connects the discharge pipeline and the closed cavity and is a one-way flow valve, and the liquid material can only flow from the closed cavity to the discharge pipeline; the damping check valve can close and cut off the connection between the closed cavity and the discharge pipeline; the damping check valve is preset with a certain opening pressure to avoid the liquid pressure in the closed cavity being too high and overflowing and to prevent the external liquid material from flowing back into the valve body.

[0026] If the pressure of the liquid material flowing into the closed cavity through the channel check valve is too high and exceeds the damping force of the damping check valve and the channel check valve, the liquid material will flow out from the damping check valve.

[0027] The channel check valve connects the closed cavity and the first channel and is a one-way flow valve, and the liquid material can only flow from the first channel into the closed cavity.

[0028] The closed cavity further includes a metering cavity, a metering plunger, and a spring; the metering plunger is installed in the metering cavity, tightly fits with the metering cavity, and can slide in the metering cavity to isolate the metering cavity into two chambers; the spring is installed in the first chamber of the metering cavity, and the two ends of the spring are respectively connected to the top of the first chamber and the metering plunger.

[0029] The two ends of the metering plunger are provided with limit indicating rods which are integral with the metering plunger and can move together with the metering plunger. One end of the limit indicating rod protrudes from the metering plunger and extends into the first chamber of the metering cavity, and the other end is connected to a displacement adjusting screw. By adjusting the displacement adjusting screw forward and backward, the length of the movement of the metering plunger (13) connected to the limit indicating rod in the metering cavity (15) is adjusted; the displacement adjusting screw is installed in a connecting sleeve outside the valve body.

[0030] The flow channel switching and compensation plunger unit includes an isolation plunger, a unit spring, and a unit valve chamber.

[0031] One end of the channel switching and compensating plunger unit is connected to the second material channel through the channel, and the liquid material can flow into the channel switching and compensating plunger unit through the channel; the channel switching and compensating plunger unit can be respectively connected to the two chambers of the metering cavity through the channel; the channel switching and compensating plunger unit is equipped with an isolation plunger, and the opening and closing of the two chambers of the channel switching and compensating plunger unit and the metering cavity are adjusted by the position movement of the isolation plunger. The pressurized liquid material passes through the second channel to compress the isolation plunger, which generates displacement to compress the unit spring to complete the feeding and energy storage. When the second channel and the first channel are connected, the pressure on the isolation plunger is reduced, and the energy stored in the unit spring is released. The isolation plunger moves under the elastic force of the unit spring, and the liquid on the plunger flows through the second channel, the solenoid valve, the first channel, etc. into the first chamber of the metering cavity separated by the metering plunger, thereby completing the material compensation.

[0032] A filter is also provided inside the valve body, and the filter is installed in the feed channel of the valve body and at the front end of the solenoid valve; the filter can intercept impurities and large particles in the liquid material to ensure the cleanliness of the liquid material entering the feed channel and the closed cavity.

[0033] The pressure sensor is installed on the outside of the valve body, connected to the second material channel, and is used to detect the pressure of the liquid material in the second material channel.

[0034] A position sensor is also provided on the connecting sleeve, and the position sensor obtains the position of the metering plunger by detecting the position of the limit indicating rod.

[0035] The dedicated controller is connected to the solenoid valve, the pressure sensor, and the position sensor, obtains data, and calculates, monitors, detects, and manages the metering process and metering values.

[0036] The present invention also provides a method for realizing quantitative metering and discharging of liquid materials by using the metering and distributing valve in the present invention. The method includes the following steps: feeding the second chamber of the metering cavity, feeding the first chamber of the metering cavity, and simultaneously completing feeding and discharging when the metering plunger moves.

[0037] The process of feeding the second chamber of the metering cavity includes the following steps: connecting the valve body main body to the feeding pipeline, the liquid material passes through the filter and the solenoid valve, the feeding flow channel of the valve body is communicated with the second material channel, the liquid material pushes the isolation plunger in the flow channel switching and compensation plunger unit, the unit spring is compressed, the communication between the first chamber of the metering cavity and the flow channel switching and compensation plunger unit is closed, the metering plunger moves backward, the spring stores energy, and drives the limit indicating rod to move backward; when the tail of the limit indicating rod contacts the bottom of the first chamber of the metering cavity, the displacement stops, and the feeding is completed; the position sensor detects and obtains the position signal of the metering plunger.

[0038] The process of feeding the first chamber of the metering cavity includes the following steps: the solenoid valve closes the feeding flow channel of the valve body and connects the first material channel and the second material channel, the isolation plunger in the flow channel switching and compensation plunger unit moves under the elastic force of the compressed unit spring, and the first chamber and the second chamber on both sides of the metering plunger are connected; the liquid material reaches the rear cavity separated by the metering plunger under the action of the spring; the flow channel switching and compensation plunger unit simultaneously discharges the liquid material at the top, passes through the second material channel, the solenoid valve, the first material channel, and the material channel check valve, fills the first chamber of the metering cavity, and compensates for the volume difference; under the action of vacuum negative pressure and spring push, the liquid material in the second chamber of the metering cavity flows into the first chamber of the metering cavity to complete the material exchange; when the movement of the metering plunger stops, the position sensor detects and obtains the position signal of the metering plunger.

[0039] The process of the metering plunger moving to complete feeding and discharging includes the following steps: after the above steps of feeding the second chamber of the metering cavity and feeding the first chamber of the metering cavity are completed, continue to perform the step of feeding the second chamber of the metering cavity. At this time, both the first chamber and the second chamber on both sides of the metering plunger are filled with liquid material. When the second material channel is connected to the feeding flow channel of the valve body through the solenoid valve, the pressurized material will flow in again, and under the action of the pressure difference, it pushes the isolation plunger of the flow channel switching and compensation plunger unit, the unit spring is compressed, the second material channel and the second chamber of the metering cavity are connected, and at the same time, the connection between the flow channel switching and compensation plunger unit and the first chamber of the metering cavity is closed, and when the metering plunger is pushed backward, the liquid material filled into the first chamber will be pushed out to the discharge pipeline through the damping check valve, that is, the discharging process is completed.

[0040] The present invention also discloses the application of the above-mentioned metering distribution valve or the above-mentioned quantitative metering and discharging method in the metering of liquid materials, such as lubricating oil, hydraulic oil, edible oil, ink, paint, liquid chemical raw materials, liquid pharmaceutical raw materials, liquid food additives, liquid glue, fuel oil or petrochemical flowable liquid materials and other industrial industries.

[0041] The beneficial effects of the present invention include: compared with the technical route of existing products, the present invention realizes that each filling route does not interfere with each other; the filling volume of each route can be different according to actual needs; each route is equipped with a visual signal or an electrical signal indication (configured with a position sensor), which is easy to observe and troubleshoot; a displacement adjustment screw is configured so that the displacement size of each route can be adjusted at any time; when a pressure sensor and / or a position sensor is configured, a multi-signal source cross-verification filling process can be achieved; it has its own filter to intercept impurities and large particles in real time, improve the working conditions of the metering plunger, one-way valve, and solenoid valve, and also help the user's equipment operation and product quality; if a dedicated controller is configured, the user can understand the working conditions of the product in real time on-site or remotely, view or modify the filling process parameters at any time, and count the filling situation. The controller has a manual mode and an automatic mode. In the automatic mode, there are a time mode, a pressure mode, a counting mode or a comprehensive mode to select the most appropriate mode to cope with different materials and needs of the user.

[0042] Specifically, compared with single-line metering valves, no pressure relief is required, and pressure changes do not affect metering accuracy; compared with progressive metering valves, each point is independently filled, unrelated to each other, and there is a visual pointer or sensor to detect the status; compared with dual-line metering valves, there is no need for reversing and laying two pipelines, nor is there any need for alternating pressurization / pressure relief; compared with progressive (or plunger) metering valves + solenoid valves (pneumatic or hydraulic switch valves), each route can discharge materials at the same time, and each route is independently metered, and the failure of one route does not affect the work of other routes; compared with gear (baffle or other structure) flow meter + solenoid valve (pneumatic or hydraulic switch valve), it has high pressure resistance, compact structure, multi-route simultaneous filling, and easy installation and use; compared with plunger metering valves + electromagnetic air source switch valve products, one switch solenoid valve can correspond to multiple filling pipelines, with a compact structure and less piping, etc. Most of the above metering valve products do not have filters, and are easily stuck if impurities or large particles enter the material, and all require additional control to work. The present invention also specially designs a dedicated controller. If the controller is selected, the product of the present invention can be put into use as a complete functional device, which is easy to operate and reduces user investment.

[0043] The metering method of the metering distribution valve in the present invention is volumetric cavity metering, which has high precision and is suitable for high-precision metering application conditions. It can be installed arbitrarily, is easy to use, and has a compact structure. The pure mechanical structure is easy to maintain, and has high reliability and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0045] Figure 1 is a schematic structural diagram of the metering and dispensing valve of the present invention.

[0046] Figure 2 is a three-dimensional view of a structure of the metering and dispensing valve of the present invention.

[0047] Figure 3 is a three-dimensional view of a structure of the metering and dispensing valve of the present invention.

[0048] Figure 4 is a three-dimensional view of a structure of the metering and dispensing valve of the present invention.

[0049] Figure 5 is a three-dimensional view of a structure of the metering and dispensing valve of the present invention.

[0050] In the figure, 1 - filter, 2 - solenoid valve, 3 - dedicated controller, 4 - damping check valve, 5 - material path check valve, 6 - discharge pipeline, 7 - first material path, 8 - pressure sensor, 9 - second material path, 10 - flow path switching and compensation plunger unit, 11 - displacement adjustment screw, 12 - position sensor, 13 - metering plunger, 14 - spring, 15 - metering cavity, 16 - connecting sleeve, 17 - valve body main body, 18 - feed port, 19 - valve body feed flow path, 20 - limit indicating rod, 21 - isolation plunger, 22 - unit spring, 23 - unit valve cavity. Detailed implementation manners

[0051] Combined with the following specific embodiments and drawings, the present invention will be further described in detail. The processes, conditions, experimental methods, etc. for implementing the present invention, except for the specifically mentioned content below, are all common knowledge and well-known common sense in the art, and the present invention has no particularly limited content.

[0052] The present invention provides a metering and dispensing valve, and the metering and dispensing valve includes a valve body main body 17;

[0053] The valve body main body 17 is the main part of the metering and dispensing valve, and completes the control and implementation of the feeding and discharging of the metering and dispensing valve; the valve body main body 17 is provided with a feed port 18 and a valve body feed flow path 19, which are connected to the external feeding pipeline, and the liquid material enters the valve body main body 17 from the outside through the feed port 18 and the valve body feed flow path 19; the inside of the valve body main body 17 includes a solenoid valve 2, a first material path 7, a second material path 9, and one or more independent closed cavities;

[0054] The solenoid valve 2 controls the flow direction of the liquid entering the valve body main body 17 by opening and closing; the first material channel 7 and the second material channel 9 are connected to the valve body feed flow channel 19 through the solenoid valve 2; both the first material channel 7 and the second material channel 9 are connected to the closed cavity. When the valve between the valve body feed flow channel 19 and the second material channel 9 is opened and the valves between the first material channel 7 and the second material channel 9 and between the first material channel 7 and the valve body feed flow channel 19 are closed, the liquid material entering the valve body main body 17 flows from the valve body feed flow channel 19 into the second material channel 9; when the valve between the first material channel 7 and the second material channel 9 is opened and the valves between the first material channel 7, the second material channel 9 and the valve body feed flow channel 19 are closed, a small part of the liquid material entering the valve body main body 17 can flow from the second material channel 9 into the first material channel 7, and most of it flows from the second chamber of the metering cavity separated by the metering plunger into the first chamber of the metering cavity separated by the metering plunger through the flow path switching and compensation plunger unit.

[0055] The closed cavity includes a damping one-way valve 4, a material channel one-way valve 5, a closed cavity, and a flow path switching and compensation plunger unit 10;

[0056] The damping one-way valve 4 connects the discharge pipeline 6 and the closed cavity and is a one-way flow valve. The liquid material can only flow from the closed cavity to the discharge pipeline 6; the damping one-way valve 4 can close and cut off the connection between the closed cavity and the discharge pipeline 6; the damping one-way valve 4 has a preset opening pressure to prevent the liquid pressure in the closed cavity from being too high and overflowing and to prevent the external liquid material from flowing back into the valve body.

[0057] The material channel one-way valve 5 connects the closed cavity and the first material channel 7 and is a one-way flow valve. The liquid material can only flow from the first material channel 7 into the closed cavity;

[0058] The closed cavity includes a metering cavity 15, a metering plunger 13, and a spring 14; the metering plunger 13 is installed in the metering cavity 15 and fits tightly with the metering cavity 15 and can slide in the metering cavity 15 to separate the metering cavity 15 into two chambers; the spring 14 is installed in the first chamber of the metering cavity 15, and both ends of the spring 14 are connected to the top of the first chamber and the metering plunger 13 respectively.

[0059] The flow path switching and compensation plunger unit 10 includes an isolation plunger 21, a unit spring 22, and a unit valve cavity 23;

[0060] One end of the flow path switching and compensating plunger unit 10 is connected to the second material path 9 through a flow path, and liquid material can flow into the flow path switching and compensating plunger unit 10 through the flow path; the flow path switching and compensating plunger unit 10 can be respectively communicated with two chambers of the metering cavity 15 through flow paths; an isolation plunger is installed in the flow path switching and compensating plunger unit 10, and the opening and closing of the flow path switching and compensating plunger unit 10 and the two chambers of the metering cavity 15 are adjusted by the position movement of the isolation plunger.

[0061] A movable limit indicating rod 20 is integrally provided in the metering plunger 13. One end of the limit indicating rod 20 protrudes from the metering plunger 13 and extends into the first chamber of the metering cavity 15, and the other end is butted with a displacement adjusting screw 11. By adjusting the forward and backward movement of the displacement adjusting screw 11, the stroke length of the movement of the metering plunger 13 connected to the limit indicating rod 20 in the metering cavity 15 is adjusted; the displacement adjusting screw 11 is installed in a connecting sleeve 16 outside the valve body.

[0062] A filter 1 is further provided inside the valve body main body 17. The filter 1 is installed in the valve body feed flow path 19, in front of the solenoid valve 2; the filter 1 intercepts impurities and large particles in the liquid material to ensure the cleanliness of the liquid material entering the material path and the closed cavity.

[0063] The metering distribution valve further includes a pressure sensor 8. The pressure sensor 8 is installed outside the valve body main body 17 and is connected to the second material path 9 for detecting the feed pressure of the liquid material in the second material path 9.

[0064] A position sensor 12 is further provided on the connecting sleeve 16. The position sensor 12 obtains the position of the metering plunger 13 by detecting the position of the limit indicating rod 20.

[0065] The valve body main body further includes a dedicated controller 3. The dedicated controller 3 is connected to the solenoid valve 2, the pressure sensor 8, and the position sensor 12 to obtain data and perform calculations, monitoring, detection, and management on the metering process and metering values.

[0066] The present invention also provides a method for quantitatively metering and discharging liquid material. The method includes the following steps: feeding the second chamber of the metering cavity 15, feeding the first chamber of the metering cavity 15, and displacing the metering plunger 13 to complete feeding and discharging.

[0067] The feeding process of the second chamber of the metering cavity 15 includes the following steps: The valve body main body 17 is connected to the feeding pipeline. The liquid material passes through the filter 1 and the solenoid valve 2. The valve body feeding flow channel 19 is communicated with the second material channel 9. The liquid material pushes the isolation plunger 21 in the flow channel switching and compensation plunger unit 10, and the unit spring 22 is compressed, closing the communication between the first chamber of the metering cavity 15 and the flow channel switching and compensation plunger unit 10. The metering plunger 13 moves backward, and the spring 14 stores energy, driving the limit indicating rod 20 to move backward; when the tail of the limit indicating rod 20 contacts the bottom of the first chamber of the metering cavity 15, the displacement stops and the feeding is completed; the position sensor 12 detects and obtains the position signal of the metering plunger 13.

[0068] The feeding process of the first chamber of the metering cavity 15 includes the following steps: The solenoid valve 2 closes the valve body feeding flow channel 19 and connects the first material channel 7 and the second material channel 9. The isolation plunger 21 in the flow channel switching and compensation plunger unit 10 moves under the elastic force of the compressed unit spring 22, and the first chamber and the second chamber on both sides of the metering plunger 13 are connected; the liquid material reaches the rear cavity separated by the metering plunger 13 under the action of the spring 14; the flow channel switching and compensation plunger unit 10 discharges the upper liquid material under the thrust of the unit spring 22, passes through the second material channel 9, the solenoid valve 2, the first material channel 7, and the material channel check valve 5. The material channel check valve 5 can also be replaced by a slide valve to fill the first chamber of the metering cavity 15 and compensate for the volume difference; under the action of vacuum negative pressure and the spring 14, the liquid material in the second chamber of the metering cavity flows into the first chamber of the metering cavity 15 to complete the material exchange; when the movement of the metering plunger 13 stops, the position sensor 12 detects and obtains the position signal of the metering plunger 13;

[0069] The displacement of the metering plunger 13 to complete the feeding and discharging process includes the following steps: After the feeding steps of the second chamber of the metering cavity 15 and the feeding steps of the first chamber of the metering cavity 15 are completed, the feeding step of the second chamber of the metering cavity 15 continues. At this time, both the first chamber and the second chamber at both ends of the metering plunger 13 are filled with liquid material. When the second material channel 9 is connected to the valve body feeding flow channel 19 through the solenoid valve 2, the pressurized material will flow in again. Under the action of the pressure difference, the isolation plunger 21 of the flow channel switching and compensation plunger unit 10 is pushed, and the unit spring 22 is compressed, connecting the second material channel 9 and the second chamber of the metering cavity 15, and at the same time closing the connection between the flow channel switching and compensation plunger unit 10 and the first chamber of the metering cavity 15. When the metering plunger 13 is pushed backward, the liquid material filled in the first chamber will be pushed out to the discharge pipeline 6 through the damping check valve 4, that is, the discharging process is completed.

[0070] The main structures involved in the present invention are specifically as follows:

[0071] 1 - Filter: Intercept impurities and large particles in the material in real time;

[0072] 2 - Solenoid valve: Cut off the feed flow channel 19 of the valve body, connect the feed flow channel 19 of the valve body and the second feed channel 9, and connect the second feed channel 9 and the first feed channel 7;

[0073] 3 - Special controller: Calculate, monitor, detect and manage the metering process and metering values;

[0074] 4 - Damping check valve: Unidirectional flow, close and cut off the corresponding feed channels. The valve is preset with a certain opening pressure to prevent the liquid pressure in the metering cavity 15 from overflowing and to prevent the liquid from flowing back into the valve body;

[0075] 5 - Feed channel check valve: Unidirectional flow, close and cut off the corresponding feed channels. The same purpose can be achieved by using a slide valve for isolation;

[0076] 6 - Discharge pipeline: The channel through which the material flows, and conveys the material to the corresponding required positions;

[0077] 7 - First feed channel: The material flow channel at the front end of the feed channel check valve 5;

[0078] 8 - Pressure sensor (pressure gauge): Detect the pressure of the second feed channel 9, and is also the protection signal source for leakage and overpressure;

[0079] 9 - Second feed channel: The material flow channel at the front end of the metering plunger 13;

[0080] 10 - Flow channel switching and compensation plunger unit: Connect and switch between the first chamber and the second chamber at both ends of the metering plunger 13 and the second feed channel 9, and at the same time compensate for the volume difference between the rod chamber and the rodless chamber of the metering plunger 13;

[0081] 11 - Displacement adjustment screw: By loosening backward or tightening forward against the limit indicating rod 20, the stroke length of the metering plunger 13 is restricted to achieve the single - time quantitative discharge volume of each metering plunger 13;

[0082] 12 - Position sensor: Detect the displacement of the metering plunger 13 and verify whether the metering plunger 13 is working properly;

[0083] 13 - Metering plunger: Form a closed cavity together with the damping check valve 4, the feed channel check valve 5, the flow channel switching and compensation plunger unit 10, the spring 14, and the metering cavity 15. At the same time, the stroke of the displacement of the metering plunger 13 is also the reference value of the single - time discharge volume;

[0084] 14 - Spring: Energy storage;

[0085] 15 - Metering cavity: The liquid storage area;

[0086] 16 - Connecting sleeve: The displacement adjustment screw 11 and the position sensor 12 are installed in the connecting sleeve and are fixed to the valve body 17 at the same time;

[0087] 17 - Valve body main body: The carrier for installing each component, and at the same time, the material channels connecting each component are machined;

[0088] 18 - Feed inlet: Connected to the external feed pipeline to add liquid material into the valve body;

[0089] 19 - Valve body feed flow channel: The flow channel at the feed end part in the valve body

[0090] 20 - Limit indicating rod: Adjust the movable position and length of the metering plunger 13 to achieve accurate metering. At the same time, it is a visual signal, and the movement of the plunger 13 in the metering cavity can be seen.

[0091] Example 1

[0092] A metering and distributing valve, including a valve body main body 17, a feed inlet 18 connected to the external feed pipeline, a valve body feed flow channel 19 communicated with the feed inlet 18, and a discharge pipeline 6 communicated with the valve body main body 17.

[0093] The valve body main body 17 includes a solenoid valve 2, a first material channel 7, a second material channel 9, and one or more independent closed cavities. The solenoid valve 2 can respectively control the connection or closing between the first material channel 7 and the second material channel 9 and the valve body feed flow channel 19.

[0094] Both the first material channel 7 and the second material channel 9 are connected to the closed cavity; the first material channel 7 and the second material channel 9 are communicated or closed through a valve.

[0095] The closed cavity includes a damping check valve 4, a material channel check valve 5, a closed cavity, a flow channel switching and compensation plunger unit 10;

[0096] The damping check valve 4 is connected to the discharge pipeline 6 and the closed cavity, and is a one - way flow valve. The liquid material can only flow from the closed cavity to the discharge pipeline 6. The damping check valve 4 can close and cut off the connection between the closed cavity and the discharge pipeline 6. The damping check valve 4 is preset with an opening pressure to avoid the liquid pressure in the closed cavity being too high and overflowing, and at the same time, to avoid the reverse entry of the external liquid material into the valve body.

[0097] The material channel check valve 5 is connected to the closed cavity and the first material channel 7, and is a one - way flow valve. The liquid material can only flow from the first material channel 7 into the closed cavity.

[0098] The closed cavity includes a metering cavity 15, a metering plunger 13, and a spring 14; the metering plunger 13 is installed in the metering cavity 15, closely cooperating with the metering cavity 15 and capable of sliding in the metering cavity 15 to isolate the metering cavity 15 into a first chamber and a second chamber. The first chamber communicates with the first feed channel 7 and the discharge pipe 6. The damping check valve 4 connects the discharge pipe 6 and the first chamber, and the feed channel check valve 5 connects the first chamber and the first feed channel 7. The spring 14 is installed in the first chamber of the metering cavity 15 to control the sliding of the metering plunger 13 in the metering cavity 15.

[0099] The flow channel switching and compensation plunger unit 10 includes an isolation plunger 21, a unit spring 22, and a unit valve cavity 23.

[0100] One end of the flow channel switching and compensation plunger unit 10 is connected to the second feed channel 9. The liquid material can flow into the flow channel switching and compensation plunger unit 10 through the flow channel. The flow channel switching and compensation plunger unit 10 communicates with the first chamber and the second chamber respectively; an isolation plunger 21 is installed in the flow channel switching and compensation plunger unit 10. One end of the isolation plunger 21 is provided with a unit spring 22 to control the position movement of the isolation plunger 21 in the flow channel switching and compensation plunger unit 10. The other end of the isolation plunger 21 forms a unit valve cavity 23. By moving the position of the isolation plunger 21, the opening or closing of the flow channel switching and compensation plunger unit 10 with the first cavity and the second cavity is adjusted.

[0101] Limit indicating rods 20 that move integrally with the metering plunger 13 are respectively arranged at both ends of the metering plunger 13. The limit indicating rod 20 arranged at one end of the metering plunger 13 extends into the first chamber of the metering cavity 15. The limit indicating rod 20 arranged at the other end of the metering plunger 13 rises out of the metering cavity 15 from the front end of the second chamber and is connected with a displacement adjusting screw 11; the displacement adjusting screw 11 is installed in a connecting sleeve 16 outside the valve body main body. By adjusting the displacement adjusting screw 11 forward and backward, the stroke length of the movement of the metering plunger 13 connected to the limit indicating rod 20 in the metering cavity 15 is adjusted.

[0102] A filter 1 is also arranged inside the valve body main body 17. The filter 1 is installed in the valve body feed flow channel 19, in front of the solenoid valve 2; the filter 1 intercepts impurities and large particles in the liquid material to ensure the cleanliness of the liquid material entering the feed channel and the closed cavity.

[0103] The metering distribution valve further includes a pressure sensor 8. The pressure sensor 8 is connected to the second feed channel 9 and is used to detect the feed pressure of the liquid material in the second feed channel 9.

[0104] A position sensor 12 is also arranged on the connecting sleeve 16. The position sensor 12 obtains the position of the metering plunger 13 by detecting the position of the limit indicating rod 20.

[0105] The valve body main body 17 further includes a dedicated controller 3, which is connected to the solenoid valve 2, the pressure sensor 8, and the position sensor 12 to obtain data and calculate, monitor, detect, and manage the metering process and metering values.

[0106] Embodiment 2

[0107] Quantitative metering workflow:

[0108] I. Feeding process of the second chamber corresponding to the metering plunger 13:

[0109] The feeding pipeline is connected to the valve body main body 17. The liquid flows through the filter 1 and the solenoid valve 2. The outlet of the solenoid valve 2 is respectively connected to the first channel 7 and the second channel 9. When the solenoid valve 2 is connected to the second channel 9, the material under pressure pushes the internal components of the flow path switching and compensation plunger unit 10 to act, connecting the front chamber formed by the metering plunger 13 and the metering cavity 15, and closing the connection channel between the rear chamber of the metering plunger 13 and the flow path switching and compensation plunger unit 10. The metering plunger 13 moves backward, and at the same time, the spring 14 is compressed and stores energy. At the same time, it drives the limit indicating rod 20 at the front end of the metering plunger 13 to move towards the first chamber of the metering cavity 15. When the limit indicating rod 20 connected to the metering plunger 13 touches the bottom of the metering cavity 15, the metering plunger 13 stops moving. At the same time, the second chamber of the metering cavity 15 divided by the metering plunger 13 is filled with a certain volume of material, and the feeding process is completed. A position sensor 12 is installed at the front end of the limit indicating rod 20 connected to the metering plunger 13 to detect the position of the limit indicating rod 20. When the metering plunger 13 moves to the bottom, it will drive the limit indicating rod 20 at the front end of the metering plunger 13 to move to a position, and at this time, the position sensor obtains a position signal X. When the internal components of the flow path switching and compensation plunger unit 10 move, they also store a certain volume of material, and at the same time, the pressure sensor 8 obtains a pressure value.

[0110] II. Feeding process of the first chamber corresponding to the metering plunger 13:

[0111] When the solenoid valve 2 cuts off the feed of the feed pipe and simultaneously connects the first feed channel 7 and the second feed channel 9, the flow path switching and compensation plunger unit 10 moves upward, connecting the first chamber and the second chamber formed by the metering plunger 13 and closing the second feed channel 9. The material in the front end chamber formed by each metering plunger 13 reaches the rear end chamber formed by the metering plunger 13 through the flow path connected to the metering plunger 13 opened by the flow path switching and compensation plunger unit 10 under the action of the spring 14. The flow path switching and compensation plunger unit 10 also discharges the stored material during this process. The stored material of the flow path switching and compensation plunger unit 10 enters the rear end chamber formed by the metering plunger 13 through the second feed channel 9, the solenoid valve 2, the first feed channel 7, the feed channel check valve 5, and filling, completing the compensation for the volume difference between the first chamber and the second chamber. When the metering plunger 13 moves forward under the action of the spring 14, a vacuum negative pressure is generated simultaneously. The material flows into the first chamber of the corresponding metering plunger 13 under the action of the vacuum negative pressure and the thrust of the spring 14 pushing the metering plunger 13. This action completes the material exchange between the two chambers at both ends of the metering plunger 13. When the metering plunger 13 moves forward under the action of the spring 14, it drives the limit indicating rod of the metering plunger 13 to move forward at the same time. When the metering plunger 13 moves to the bottom of the front chamber and stops, the position sensor 12 obtains a position signal Y at this time. When the material is transferred from the second feed channel 9 to the first feed channel 7 and enters the first chamber of each metering plunger 13, the pressure value of the pressure sensor 8 connected to the second feed channel 9 will decrease;

[0112] III. Discharging process of the metering plunger:

[0113] After the above steps I and II are completed, continue with step I. At this time, since both ends of the metering plunger 13 are filled with material, when the second feed channel 9 is connected to the feed pipe through the solenoid valve 2, the pressurized material will flow in again. Under the action of the pressure difference, the isolation plunger 21 of the flow path switching and compensation plunger unit 10 is pushed, and the unit spring 22 is compressed, connecting the second feed channel 9 and the second chamber of the metering cavity 15. At the same time, the first chamber of the flow path switching and compensation plunger unit 10 and the metering cavity 15 is closed. When the metering plunger 13 is pushed backward, the material filled into the first chamber of the valve will be ejected through the damping check valve 4 into the discharge pipe 6, completing the discharging process. By executing step I and step II in this cycle, quantitative discharging is completed.

[0114] By selecting metering plungers 13 with different single displacements or adjusting the position of the displacement adjusting screw 11, different single discharge volumes can be obtained. Each path can select the single discharge amount according to actual needs. By calculating the number of actions in step I and step II, the filling volume of each path required by the process can be calculated, thereby achieving the purpose of metering and filling. The present invention is designed with a filter 1 to intercept impurities and large particles in the material in real time, ensuring the cleanliness of the material entering the metering plunger 13, thereby reducing the risk of jamming of each moving part in the valve body, and also contributing to the operation of the customer's equipment and product quality.

[0115] The main improvements in the present invention include:

[0116] 1. The metering and filling of each filling channel are independent of each other, and the failure of one or more channels does not affect the filling of other channels;

[0117] 2. The metering plunger 13 of each filling channel is provided with a visual pointer or an electric signal detection or a combination of a visual pointer and an electric signal (the visual pointer is the limit indicating rod 20, and the electric signal detection is the position sensor 12 and the pressure sensor 8) for dual on-site indication;

[0118] When one or more metering plungers 13 fail due to certain factors, it can be timely feedback or observed, and at the same time, the metering of the filling material quantity of each channel can be realized;

[0119] 3. When the pressure sensor 8 with an electric signal or the position sensor 12 or both are configured, the pressure sensor 8 and the position sensor 12 can not only be used as detection and verification signals for whether the filling process is normal, but also independently serve as signal sources for the solenoid valve 2 to act. According to the different physical properties of different materials, time mode, pressure signal filling mode, position signal filling mode, or position / pressure signal dual-verification filling mode can be selected, and different modes facilitate users to obtain the best results.

[0120] 4. The damping check valve 4, the material channel check valve 5, the flow channel switching and compensation plunger unit 10, and the spring 14 have different kinetic energies and damping forces, forming a stepped pressure difference, so that the first chamber and the second chamber formed by the division of the metering plunger 13 form a stable and closed cavity, making accurate metering possible, and further realizing a stable and accurate filling-discharging cycle.

[0121] Minor improvements:

[0122] 1. The filter 1 intercepts impurities and large particles in the material in real time, ensuring the cleanliness of the material entering the cavity of the metering plunger 13, thereby reducing the risk of jamming of components such as the solenoid valve 2, the damping check valve 4, the material channel check valve 5, the flow channel switching and compensation plunger unit 10, and the metering plunger 13, and at the same time contributing to the operation of the customer's equipment and the product quality;

[0123] 2. The flow channel switching and compensation plunger unit 10 opens and cuts off the relevant oil circuits and stores the material at the same time, ensuring that the first chamber and the second chamber formed by the division of the metering plunger 13 are filled with material, and further ensuring the filling accuracy;

[0124] 3. The metering plunger 13 can select different specification lengths to obtain a single fixed displacement, which is convenient for matching when the filling amounts of each channel are different during multi-channel filling;

[0125] 4. The displacement adjustment screw 11 can adjust the single displacement according to the process requirements at any time, and the operation is simple and convenient;

[0126] 5. The number of filling routes can be selected from 1 to N routes according to equipment layout, process requirements and other conditions, which is convenient for users to design, install and use, and achieve one-to-one correspondence;

[0127] 6. Each discharge pipe can be connected to a progressive metering valve for secondary distribution, which is convenient for users to control costs;

[0128] 7. All parts are installed in a valve body 17, which has a compact structure, is resistant to high pressure, has a small pressure loss, a neat appearance and is easy to install.

[0129] According to the working principle of the present invention, the solenoid valve 2 can be replaced by a pneumatic, hydraulic, mechanical energy storage lever, a plurality of single-function or multi-function solenoid valves or a pneumatic valve or a hydraulic valve combination or a cam rotating mechanism to realize and achieve the functions and purposes of the present invention.

[0130] The material inlet can be set on any surface of the valve body 17 according to customer requirements or space limitations; the discharge pipe 6 can adopt a single-layer, double-layer or multi-layer layout according to user requirements or space limitations; the position sensor 12 can be installed horizontally, vertically or buried; the solenoid valve 2 can be installed vertically, horizontally, horizontally, in the middle or on the side or end face of the valve body; if the first material channel 7 is only connected to the nearest material channel one-way valve 5, and the other material channels are not connected, the material channel one-way valve 5 can be replaced by a cut-off slide valve, and a cut-off slide valve can be used to replace the material channel one-way valve 5 for each channel.

[0131] The protection content of the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, changes and advantages that can be thought of by those skilled in the art are included in the present invention and are protected by the attached claims.

Claims

1. A metering and distributing valve, characterized in that, The metering and distribution valve includes a valve body main body (17); The valve body main body (17) is the main part of the metering and distribution valve, and completes the control and implementation of the feeding and discharging of the metering and distribution valve; the valve body main body (17) is provided with a feeding port (18) and a valve body feeding flow channel (19), which are connected to the external feeding pipeline, and the liquid material enters the valve body main body (17) from the outside through the feeding port (18) and the valve body feeding flow channel (19); the valve body main body (17) includes an electromagnetic valve (2), a first material channel (7), a second material channel (9), and one or more independent closed cavities; The electromagnetic valve (2) controls the liquid flow direction entering the valve body main body (17) by opening and closing; the first material channel (7) and the second material channel (9) are connected to the valve body feeding flow channel (19) through the electromagnetic valve (2); both the first material channel (7) and the second material channel (9) are connected to the closed cavity.

2. The metering and dispensing valve according to claim 1, characterized in that, Open the valve between the valve body feeding flow channel (19) and the second material channel (9), close the valves between the first material channel (7) and the second material channel (9) and between the first material channel (7) and the valve body feeding flow channel (19), and the liquid material entering the valve body main body (17) flows from the valve body feeding flow channel (19) into the second material channel (9); open the valve between the first material channel (7) and the second material channel (9), close the valves between the first material channel (7) and the second material channel (9) and between the first material channel (7), the second material channel (9) and the valve body feeding flow channel (19), and the liquid material entering the valve body main body (17) flows from the second material channel (9) into the first material channel (7), and / or flows from the second chamber of the metering cavity (15) separated by the metering plunger (13) into the first chamber of the metering cavity (15) separated by the metering plunger (13) through the flow channel switching and compensation plunger unit (10), thereby completing the material exchange between the first chamber and the second chamber separated by the metering plunger (13).

3. The metering and dispensing valve according to claim 1, characterized in that, The closed cavity includes a damping check valve (4), a material channel check valve (5), a closed cavity, and a flow channel switching and compensation plunger unit (10); The damping check valve (4) connects the discharge pipeline (6) and the closed cavity, and is a one-way flow valve. The liquid material can only flow from the closed cavity to the discharge pipeline (6); the damping check valve (4) can close and cut off the connection between the closed cavity and the discharge pipeline (6); the damping check valve (4) has a preset opening pressure to prevent the liquid pressure in the closed cavity from being too high and overflowing, and at the same time prevent the external liquid material from flowing back into the valve body; The material channel check valve (5) connects the closed cavity and the first material channel (7), and is a one-way flow valve. The liquid material can only flow from the first material channel (7) into the closed cavity; The closed cavity comprises a metering cavity (15), a metering plunger (13), and a spring (14); the metering plunger (13) is installed in the metering cavity (15), closely matches the metering cavity (15), and can slide in the metering cavity (15), thereby isolating the metering cavity (15) into two chambers; the spring (14) is installed in the first chamber of the metering cavity (15), and the two ends of the spring (14) are respectively connected to the top of the first chamber and the metering plunger (13); The flow channel switching and compensating plunger unit (10) comprises an isolating plunger (21), a unit spring (22), and a unit valve chamber (23); One end of the flow channel switching and compensating plunger unit (10) is connected to the second material channel (9) through a flow channel, and liquid material can flow into the flow channel switching and compensating plunger unit (10) through the flow channel; the flow channel switching and compensating plunger unit (10) is respectively connected to the two chambers of the metering cavity (15) through the flow channel; an isolation plunger (21) is installed in the flow channel switching and compensating plunger unit (10), and the opening and closing of the two chambers of the flow channel switching and compensating plunger unit (10) and the metering cavity (15) are adjusted by moving the position of the isolation plunger.

4. The metering and dispensing valve according to claim 3, characterized in that, A limit indicating rod (20) is arranged at both ends of the metering plunger (13) and is integrated with the metering plunger (13) and can move with the metering plunger (13); one end of the limit indicating rod (20) protrudes from the metering plunger (13) and extends into the first chamber of the metering cavity (15); the other end is butted against a displacement adjusting screw (11); by adjusting the displacement adjusting screw (11) forward and backward, the length of the movement of the metering plunger (13) connected to the limit indicating rod (20) in the metering cavity (15) is adjusted; the displacement adjusting screw (11) is installed in a connecting sleeve (16) outside the valve body.

5. The metering and dispensing valve according to claim 1, characterized in that, A filter (1) is also provided inside the valve body (17), and the filter (1) is installed in the valve body feed channel (19) and at the front end of the solenoid valve (2); the filter (1) intercepts impurities and large particles in the liquid material to ensure the cleanliness of the liquid material entering the feed channel and the closed cavity.

6. The metering and dispensing valve according to claim 1, characterized in that, The metering dispensing valve further comprises a pressure sensor (8), wherein the pressure sensor (8) is connected to the second material channel (9) and is used to detect the feed pressure of the liquid material in the second material channel (9).

7. The metering and dispensing valve according to claim 4, characterized in that, A position sensor (12) is also provided on the connecting sleeve (16), and the position sensor (12) obtains the position of the metering plunger (13) by detecting the position of the limit indicating rod (20).

8. The metering and dispensing valve according to claim 1, characterized in that, The valve body (17) also includes a dedicated controller (3), which is connected to the solenoid valve (2), the pressure sensor (8), and the position sensor (12) to obtain data and calculate, monitor, detect and manage the metering process and metering values.

9. A method for quantitatively metering and discharging liquid materials, characterized in that, The method includes the following steps: feeding the second chamber of the metering cavity (15), feeding the first chamber of the metering cavity (15), and moving the metering plunger (13) to complete feeding and discharging; The process of feeding the second chamber of the metering cavity (15) includes the following steps: connecting the valve body main body (17) to the feed pipe, the liquid material passes through the filter (1) and the solenoid valve (2), the valve body feed flow channel (19) is communicated with the second feed channel (9), the liquid material pushes the isolation plunger (21) in the flow channel switching and compensation plunger unit (10), the unit spring (22) is compressed, the communication between the first chamber of the metering cavity (15) and the flow channel switching and compensation plunger unit (10) is closed, the metering plunger (13) moves backward, the spring (14) stores energy, and drives the limit indicating rod (20) to move backward; when the tail of the limit indicating rod (20) contacts the bottom of the first chamber of the metering cavity (15), the displacement stops and the feeding is completed; the position sensor (12) detects and obtains the position signal of the metering plunger (13); The process of feeding the first chamber of the metering cavity (15) includes the following steps: the solenoid valve (2) closes the valve body feed flow channel (19) and connects the first feed channel (7) and the second feed channel (9), the isolation plunger (21) in the flow channel switching and compensation plunger unit (10) moves under the elastic force of the compressed unit spring (22), and the first chamber and the second chamber at both ends of the metering plunger (13) are connected; the liquid material reaches the first chamber separated by the metering plunger (13) under the action of the spring (14); the flow channel switching and compensation plunger unit (10) discharges the stored liquid material, and fills the first chamber of the metering cavity (15) through the second feed channel (9), the solenoid valve (2), the first feed channel (7), and the feed channel check valve (5) to compensate for the volume difference; under the action of vacuum negative pressure and the spring (14), the liquid material in the second chamber of the metering cavity (15) flows into the first chamber of the metering cavity (15) to complete the material exchange; when the movement of the metering plunger (13) stops, the position sensor (12) detects and obtains the position signal of the metering plunger (13); The process of moving the metering plunger (13) to complete feeding and discharging includes the following steps: after the steps of feeding the second chamber of the metering cavity (15) and feeding the first chamber of the metering cavity (15) are completed, continue to perform the step of feeding the second chamber of the metering cavity (15). At this time, both the first chamber and the second chamber on both sides of the metering plunger (13) are filled with liquid material. When the second feed channel (9) is connected to the valve body feed flow channel (19) through the solenoid valve (2), the pressurized material will flow in again. Under the action of the pressure difference, the isolation plunger (21) of the flow channel switching and compensation plunger unit (10) is pushed, the unit spring (22) is compressed, the second feed channel (9) is connected to the front cavity of the metering cavity (15), and at the same time, the communication between the flow channel switching and compensation plunger unit (10) and the rear cavity of the metering cavity (15) is closed, and when the metering plunger (13) is pushed backward, the liquid material filled in the first chamber is ejected into the discharge pipe (6) through the damping check valve (4), that is, the discharging process is completed.

10. The metering and dispensing valve according to any one of claims 1-8, or the application of the method according to claim 9 in the metering of liquid materials.

Images