A batching valve, a batching device and a control method
By designing a dosing valve that controls the air intake unit, three working states are achieved, which solves the problems of low accuracy and low efficiency of spice ingredients, and reduces waste through the residual leakage recovery unit, achieving an efficient and accurate dosing process.
Patent Information
- Application Number
- CN202110815325.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-07-19
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2041-07-19
AI Technical Summary
The existing spice ingredients technology has problems such as low accuracy, low efficiency and leakage of materials, and the health of the operator is threatened, and the production efficiency and cost are high.
A dosing valve is designed to control the opening and closing of the air intake unit to achieve three working states: regular injection, closed injection and interval injection, improve batching accuracy and efficiency, and equipped with residual leakage recovery unit to reduce raw materials waste.
Improve the accuracy and efficiency of ingredients, reduce raw material waste, reduce production costs, and improve the operating environment.
Smart Images
Figure CN113548421B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of spice production equipment, and in particular to a dispensing valve, a dispensing device and a control method. Background Art
[0002] In the flavor and fragrance industry, a large formula is often composed of multiple different types of raw materials in a certain formula ratio. Currently, there are two ways to mix ingredients in a large formula in a certain ratio:
[0003] In the first type of manual batching, the batching personnel take out the raw materials in turn according to the formula ratio. Before each raw material is injected, the scale must be reset to zero first, and then the specified weight is injected into the mixing barrel in turn. After all the formula raw materials are injected into the mixing barrel, the different raw materials are fully mixed to complete the batching. During the injection process, the liquid is easy to oscillate in the barrel, resulting in unstable weight values. The operator needs to concentrate highly. While keeping a close eye on the weighing value, the hand must also control the rhythm and wait for the weight value to stabilize. The hand is prone to shaking, making it difficult to achieve high-precision batching, and the consistency of raw material ratios in different batches is difficult to ensure; the operator directly contacts the formula, and the confidentiality of the company's core secrets is poor; the operator has high physical requirements, high labor intensity, and is prone to fatigue after long-term work, and the efficiency is low; as long as the weight of one raw material added deviates by more than 5‰, all the raw materials injected before will be scrapped, and the probability of large waste is high; liquid raw materials are usually highly volatile, and the pungent odor will cause damage to the operator's respiratory tract, and the working environment is relatively harsh. In traditional batching valves, there must be residual liquid in each batching process, and these residual wastes will greatly increase the cost of raw materials.
[0004] The second method is to control the batching valve for batching. The working and control methods of the batching valve determine the speed and accuracy of raw material injection. At present, the normally open batching valve is mainly used. When the liquid weight or volume is about to reach the predetermined value, the flow rate is slowed down to approach the predetermined value. Since the liquid injection into the barrel will cause oscillation, resulting in unstable metering data, the high-precision liquid injection process requires a long data stabilization waiting time. In order to ensure the batching accuracy, the closer to the predetermined value, the longer the waiting time, resulting in lower efficiency.
[0005] Therefore, it is necessary to improve the existing technology and propose a new batching valve structure to improve the batching accuracy and batching efficiency. Summary of the invention
[0006] The embodiments of the present application solve the problems of low batching accuracy, low efficiency and material leakage by proposing a batching valve, a batching device and a control method of the batching device.
[0007] The embodiment of the present application is a dispensing valve, comprising: a feeding unit, the feeding unit comprising a feeding hole, the feeding hole is used to provide the formula raw material to the feeding hole, a discharging hole, the discharging hole comprises a discharging port, the discharging port is used to eject the formula raw material provided by the feeding hole, a sealing unit, the sealing unit is connected to the feeding unit, and comprises a valve body, the valve body is provided with an installation cavity, the installation cavity is communicated with the discharging hole, a sealing body, one end of the sealing body is gap-mounted in the installation cavity, and the other end thereof extends to the discharging hole, a stroke adjustment mechanism, which is used to provide a first force for the sealing body and the sealing body blocks the discharging port of the discharging hole only under the condition of the first force; an air intake unit, the air intake unit comprises a first working mold The invention discloses a first working mode, a second working mode and a third working mode. In the first working mode, the air inlet unit starts air inlet to provide a second force to the sealing body, the second force is opposite to the first force and is greater than the first force, the sealing body moves upward, and the discharge port of the discharge hole sprays material normally. In the second working mode, the air inlet unit closes air inlet, the sealing body is not subjected to the second force, and the sealing body is only subjected to the first force. The sealing body blocks the discharge port of the discharge hole, and the discharge port stops spraying. In the third working mode, the air inlet unit opens and closes air alternately according to a preset time, and the sealing body reciprocates up and down to make the discharge port of the discharge hole spray material at intervals.
[0008] Optionally, the discharge port is a closed conical hole, and a conical shaft is provided at the end of the sealing body. The shape of the closed conical hole is adapted to the shape of the conical shaft at the end of the sealing body. When the end of the sealing body moves to the discharge port, the conical shaft of the sealing body contacts the closed conical hole to seal the discharge port.
[0009] Optionally, the material of the closed conical hole and the material of the conical shaft are both tungsten steel, and the surface of the closed conical hole and the surface of the conical shaft are both mirror-polished.
[0010] Optionally, a second-order cylindrical hole is provided in the valve body, the second-order cylindrical hole includes a first hole and a second hole, the aperture of the first hole is larger than the aperture of the second hole, the sealing body is a three-order cylinder, including a first cylinder, a second cylinder and a third cylinder, the second cylinder is arranged between the first cylinder and the third cylinder, the second cylinder is installed in cooperation with the first hole, and the first hole is divided into a first chamber and a second chamber, the first cylinder is above the second cylinder, and is used to install a stroke adjustment mechanism, the third cylinder is arranged below the second cylinder, partially installed in the second hole, and its end extends to the discharge hole, the air intake unit includes an air intake valve body and a control valve, the air intake valve body is provided with an air channel, the air channel is communicated with the second chamber, and the control valve is used to control the opening and closing of the air intake of the air channel.
[0011] Optionally, the control valve is a solenoid valve, which is used to control the opening and closing of the air intake of the air channel.
[0012] Optionally, when the solenoid valve controls the air inlet to open, gas with a certain pressure enters the air channel, and the gas provides a certain air pressure for the second chamber. A second force is derived from the air pressure. When the second force is greater than the first force provided by the stroke adjustment mechanism, the sealing body moves upward, and the discharge port of the discharge hole starts to discharge. After the solenoid valve controls the air inlet to close, the supply of a certain air pressure to the second chamber is stopped, and the sealing body is not affected by the second force but only by the first force provided by the stroke adjustment mechanism. The sealing body moves downward, and the discharge port of the discharge hole stops discharging.
[0013] Optionally, the stroke adjustment mechanism includes a shell, a stroke adjustment sleeve, a spring preload rod and a spring, the shell is connected to the valve body, the stroke adjustment sleeve is installed inside the shell, the spring preload rod is installed inside the stroke adjustment sleeve, one end of the spring is in contact with the sealing body, and the other end thereof is in contact with one end of the spring preload rod.
[0014] The present application also provides a batching device, comprising: the above-mentioned batching valve; 8. A batching device, characterized in that it comprises: the above-mentioned batching valve, a residual leakage recovery unit, used to recover the residual material in the valve cavity of the batching valve, the residual leakage recovery unit comprises, a material receiving body, a recovery channel is provided in the material receiving body, one end of the recovery channel cooperates with the outer wall of the feeding unit, so that the discharge hole is connected with one end of the recovery channel, a negative pressure pump, the negative pressure pump is connected to the other end of the recovery channel, the negative pressure pump is used to provide negative pressure for the material receiving body, a recovery barrel, used to receive the residual material extracted by the negative pressure pump, a first cylinder, the first cylinder is fixed on a base, a second cylinder, the second cylinder is connected to the piston rod of the first cylinder, the first cylinder is used to control the horizontal movement of the second cylinder, the piston rod of the second cylinder is connected to the material receiving body, and is used to drive the material receiving body to move vertically up and down. Optionally, a sealing groove is also provided at the cooperation between the recovery channel and the outer wall of the feeding unit, and a sealing ring is installed in the sealing groove.
[0015] The present application also provides a batching device control method, comprising:
[0016] S1: Control the opening of the air inlet unit, the second force is greater than the first force, the sealing body moves upward, the discharge port leaks out, and the discharge starts;
[0017] S2: Control the air intake unit to open and close alternately according to a preset time, and the discharge port of the discharge hole sprays the material at intervals;
[0018] S3: Control the air intake unit to close the air intake, and the discharge port of the discharge hole to close the spraying;
[0019] S4: Control the rise of the first cylinder and the second cylinder so that the receiving body of the residual leakage recovery unit cooperates with the outer wall of the feeding unit, the discharge port is connected with the recovery channel, and the negative pressure pump works to suck the residual material at the discharge port into the return barrel.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] 1. The present invention provides a batching valve which realizes three batching working states by controlling the opening and closing of an air inlet unit: in the first working state, the discharge port is constantly spraying; in the second working state, the discharge port is closed for spraying; in the third working state, the discharge port is spraying at intervals. In the batching process, the batching accuracy and efficiency are improved by implementing the three working modes.
[0022] 2. The batching device provided by the present invention can firstly recover the residual materials inside the batching valve cavity through the residual material recovery unit after the batching is completed, thereby reducing the waste of raw materials and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is a schematic structural diagram of a dispensing valve as an implementation method;
[0024] Figure 2 yes Figure 1 A schematic diagram of a batching state in which a batching valve outlet is normally open;
[0025] Figure 3 yes Figure 1 Schematic diagram of batching state in which the discharge port of the batching valve is normally closed;
[0026] Figure 4 is a schematic structural diagram of a batching device as an implementation method;
[0027] Figure 5 is a flow chart of a batching device control method as an implementation method;
[0028] In the figure: 1: batching valve; 2: batching device; 11: feeding unit; 12: sealing unit; 111: feeding hole; 112: discharging hole; discharging port: 1121; valve body: 121; second-order cylindrical hole: 1211; first hole: 1211a; second hole: 1211b; 122: sealing body; 1221: first cylinder; 1222: second cylinder; 1223: third cylinder; 123: stroke adjustment mechanism; 1231: housing; 1232: stroke adjustment sleeve; 1233: spring preset rod; 1234: spring; 124: air intake unit; 1241: air intake valve body; 1242: control valve;
[0029] 21: material receiving body; 22: negative pressure pump; 23: recovery barrel; 24: first cylinder; 25: second cylinder; 211: recovery channel; DETAILED DESCRIPTION
[0030] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings, but these embodiments do not limit the present invention. Structural, methodological, or functional changes made by ordinary technicians in the field based on these embodiments are all included in the protection scope of the present invention.
[0031] like Figures 1 to 3 As shown, the present application discloses a dispensing valve, including a feeding unit 11 and a sealing unit 12, the feeding unit 11 includes a feeding hole 111, the feeding hole 111 is used to provide a formula raw material to the feeding hole 111, the discharging hole 112 includes a discharge port 1121 for ejecting the formula raw material provided by the feeding hole 111, the sealing unit 12, the sealing unit 12 is connected to the feeding unit 11, the sealing unit 12 includes a valve body 121, a sealing body 122, a stroke adjustment mechanism 123 and an air intake unit 124, the valve body 121 is provided with an installation cavity, the installation cavity is communicated with the discharging hole 112, one end of the sealing body 122 is installed in the gap installation cavity, and the other end thereof extends to the discharging hole 112, the stroke adjustment mechanism 123 is used to provide a first force F1 for the sealing body 122, and only under the condition of the first force F1, the sealing body 122 moves downward to discharge the material from the discharging hole 112 The outlet 1121 is blocked; the air inlet unit 124 includes a first working mode, a second working mode and a third working mode. In the first working mode, the air inlet unit opens the air inlet to provide a second force F2 for the sealing body 122, the second force F2 is opposite to the first force F1 in direction and the second force F2 is greater than the first force F1, the sealing body 122 moves upward, and the discharge hole 112 sprays material normally. In the second working mode, the air inlet unit 124 closes the air inlet, the sealing body 122 is not subjected to the second force F2, the sealing body 122 is only subjected to the first force F1, the sealing body 122 blocks the discharge port of the discharge hole 112, and the discharge hole 112 stops spraying. In the third working mode, the air inlet unit 124 opens and closes the air inlet alternately according to a preset time, the sealing body 122 reciprocates up and down, and the discharge port of the discharge hole 112 sprays material at intervals.
[0032] In order to ensure that the sealing body 122 can effectively seal the discharge port when it contacts the discharge port to avoid material leakage, in some implementations, the discharge port 1121 is a closed conical hole, and a conical shaft is provided at the end of the sealing body 122. The shape of the closed conical hole is adapted to the shape of the conical shaft at the end of the sealing body. When the end of the sealing body 122 moves to the discharge port 1121, the conical shaft of the sealing body 122 contacts the closed conical hole to seal the discharge port; so that no material leaks out after the end of the sealing body 122 contacts the discharge port 1121. During the batching process, in order to accurately batch the ingredients, the air inlet unit 124 is in the third working mode, and the air inlet unit 124 is opened and closed alternately according to a preset time. The sealing body 122 reciprocates up and down to contact the discharge port, and the discharge port of the discharge hole 112 sprays material at intervals. In this case, the sealing body 122 and the discharge port 1121 will frequently contact and separate. In order to reduce the wear of the sealing body 122 and the discharge port 1121, the material used for the sealing body 122 and the discharge port 1121 is a material with good wear resistance. In some embodiments, the sealing body 122 and the discharge port 1121 are both made of tungsten steel. It should be noted that, in this embodiment, the sealing body and the discharge port are not limited to tungsten steel materials. It can be understood that the materials of the discharge port 1121 and the sealing body 122 only need to be wear-resistant, and the surface of the closed conical hole and the surface of the conical shaft are both mirror-polished. In this way, by using tungsten steel material for mirror polishing, the accuracy of the roughness of the surfaces of the sealing body 122 and the discharge port 1121 is improved, and the situation of material seepage after the sealing body 122 and the discharge port 1121 come into contact is reduced.
[0033] Please refer to Figure 1As shown, in some embodiments, a second-order cylindrical hole 1211 is provided in the valve body 121, and the second-order cylindrical hole 1211 includes a first hole 1211a and a second hole 1211b, and the aperture of the first hole 1211a is larger than the aperture of the second hole 1211b, and the sealing body 122 is a three-order cylinder, including a first cylinder 1221, a second cylinder 1222 and a third cylinder 1223, and the second cylinder 1222 is arranged between the first cylinder 1221 and the third cylinder 1223, and the second cylinder 1222 is installed in cooperation with the first hole 1211a The first hole 1211a is divided into a first chamber and a second chamber. The first cylinder 1221 is above the second cylinder 1222 and is used to install the stroke adjustment mechanism 123. The third cylinder 1223 is arranged below the second cylinder 1222 and is partially installed in the second hole 1211b. Its end extends to the discharge hole. The air intake unit includes an air intake valve body 1241 and a control valve 1242. The air intake valve body 1241 is provided with an air channel, which is communicated with the second chamber. The control valve 1241 is used to control the opening and closing of the air intake of the air channel. In some embodiments, in order to enhance the air tightness of the second chamber, a first sealing groove is provided on the second cylinder, a first sealing ring is installed on the first sealing groove, a second sealing groove is provided at one end of the discharge hole of the feeding unit 11 that contacts the first hole 1211b, and a second sealing ring is installed in the second sealing groove. When the air inlet unit is opened to provide a certain pressure of gas to the second chamber, the air pressure in the second chamber is maintained within a stable range, thereby maintaining the second force acting on the second cylinder within a stable range, effectively avoiding the second force becoming smaller due to pressure relief in the second chamber during the batching process. If the second force is smaller than the first force, the discharge port that is normally open becomes blocked by the sealing body, affecting the batching efficiency.
[0034] Please refer to Figures 1 to 3As shown, the first force F1 is a constant force on the second cylinder 1222. In this embodiment, the first force is the elastic force provided by the spring. The stroke adjustment mechanism 123 includes a housing 1231, a stroke adjustment sleeve 1232, a spring preload rod 1233 and a spring 1234. The housing 1231 is connected to the valve body 121. The stroke adjustment sleeve 1232 is installed inside the housing 121 through a first threaded structure. The spring preload rod 1233 is installed inside the stroke adjustment sleeve 1232 through a second threaded structure. One end of the spring 1234 contacts the first cylinder 1221, and the other end contacts one end of the spring preload rod 1233. The magnitude of the first force F1 can be adjusted by the spring preload rod or the stroke adjustment sleeve. In actual use, the magnitude of the first force F1 is adjusted so that the value of the first force F1 is greater than the value of the second force F2. In this embodiment, the control valve 1242 is a solenoid valve, and the opening and closing of the air channel are controlled by the solenoid valve. More specifically, when the solenoid valve controls the air inlet to open, gas with a certain pressure enters the air channel, and the gas provides a certain air pressure for the second chamber, and the second force F2 is obtained from the air pressure. When the second force F2 is greater than the first force F1 provided by the stroke adjustment mechanism, the sealing body 122 moves upward, and the discharge port 1121 of the discharge hole 112 starts to discharge. After the solenoid valve controls the air inlet to close, it stops providing a certain air pressure to the second chamber, and the sealing body 122 is not affected by the second force F2, but only by the first force F1 provided by the stroke adjustment mechanism 123. The sealing body 122 moves downward, and the discharge port 1121 of the discharge hole 112 stops discharging. By controlling the opening and closing of the air inlet unit, three working states of batching are realized: in the first working state, the discharge hole is sprayed constantly; in the second working state, the discharge hole is closed to spray; in the third working state, the discharge hole sprays at intervals. In the batching process, the three working modes are implemented to improve the accuracy and efficiency of batching.
[0035] In this embodiment, the solenoid valve is controlled by PLC, and the size of the single-point injection raw material droplets is accurately controlled by controlling the frequency of the on and off of the solenoid valve. The specific control method adopts a threshold control strategy to achieve switching between normally open and dotted main material control modes, and establishes a linear equation for controlling the air flow valve 0-10 volt voltage and 0-950Pa material pressure range. The effective control range of material pressure and single-point weight is intercepted, and the single-point weight offline and online calibration methods are combined. Based on 485 bus communication technology, single-point weight precise control is achieved to ensure injection accuracy.
[0036] like Figure 3As shown, a specific embodiment of the present application also provides a batching device, including: the above-mentioned batching valve 1 and a residual leakage recovery unit 2, the residual leakage recovery unit is connected to the batching valve 1, and is used to recover the residual material in the valve cavity of the batching valve 1, and the residual leakage recovery unit 2 includes a material receiving body 21, a negative pressure pump 22, a recovery barrel 23, a first cylinder 24 and a second cylinder 25; a recovery channel 211 is provided in the material receiving body 21, and one end of the recovery channel 211 cooperates with the outer wall of the feeding unit 11, so that the discharge hole 112 is connected to the end of the recovery channel 211. The negative pressure pump 22 is connected to the other end of the recovery channel 211, and the negative pressure pump 22 is used to provide negative pressure for the material receiving body 21. The recovery barrel 23 is connected to one end of the negative pressure pump 22, and is used to receive the residual material extracted by the negative pressure pump 22. The first cylinder 24 is fixed on a base, and the second cylinder 25 is connected to the piston rod of the first cylinder 24. The first cylinder 24 is used to control the horizontal movement of the second cylinder 25, and the piston rod of the second cylinder 25 is connected to the material receiving body 21, and is used to drive the material receiving body 21 to move vertically up and down. In a preferred embodiment, a sealing groove is also provided at the matching place between the recovery channel 211 and the outer wall of the feeding unit 11, and a sealing ring is installed in the sealing groove. In this embodiment, a recovery channel 211 is provided in the material receiving body 21, wherein the aperture of the recovery channel at one end communicating with the discharge hole 112 is larger than the aperture of the discharge hole 112, so that when the second cylinder 25 is working, the material receiving body 21 rises and is connected with the dosing valve 1, and the hole of the discharge hole 112 is completely connected with the hole of the recovery channel 211. When the negative pressure pump is working, the residual material inside the valve body of the dosing valve can be recovered into the recovery barrel more efficiently.
[0037] The above-mentioned batching valve and batching device are also compatible with the batching production line. Multiple groups of batching devices can be set up on the automated batching production line for batching. After the batching is completed, the residual material in the batching valve can be absorbed by the residual material recovery unit, avoiding manual cleaning of the batching valve device separately, saving manpower and improving the efficiency of batching.
[0038] The specific working process of the batching device can be referred to as follows: the batching device can be used alone or in conjunction with the production line. When batching is performed in conjunction with the production line, the batching device is arranged after the barrel to be batched enters the production line, and the barrel to be batched moves to the position of the batching device. In order to more accurately detect whether the barrel with the batching is in place, a position sensor can be provided at the position of the batching valve device, and the barrel to be batched moves to the position of the batching valve. The signal of the position sensor is transmitted to the PLC, and the PLC sends an instruction to the solenoid valve to open the air channel. The air channel provides a certain air pressure for the second chamber of the batching valve, so that the sealing body is affected by the second force at the same time. Since the value of the second force is greater than the value of the first force, the sealing body moves up and separates from the discharge port, and the discharge port begins to be normally open to discharge materials. When the batching is about to end, in order to more accurately reach the weight of the batching, the PLC controls the conduction and closing of the solenoid valve at a certain frequency, so that the air intake unit regularly intakes and stops air intake, and the discharge hole sprays materials at intervals. The size of the discharge droplets at the discharge port can be controlled by controlling the conduction frequency of the solenoid valve. The size of the discharge droplets at a single point at the discharge port can be calibrated offline, and the calibrated data can be input into the PLC. The PLC control of the solenoid valve is based on 485 bus communication technology. In this way, the PLC control of the solenoid valve ensures the single-point weight accuracy of the discharge port and the injection accuracy.
[0039] After the batching is completed, the material barrel is transported away from the batching device, and the position signal sensor transmits the signal to the PLC. The PLC controls the feeding port to stop feeding, and the first cylinder of the residual material recovery unit drives the second cylinder to move horizontally to the bottom of the batching device. The second cylinder drives the material receiving body to dock with the batching valve, and the negative pressure pump starts working to extract the residual material inside the batching valve into the recovery barrel. After the residual material recovery is completed, the second cylinder of the residual recovery unit descends, driving the material receiving body to separate from the batching valve body, and the first cylinder drives the material receiving body to move horizontally for reset. At this time, the solenoid valve is powered off, the air intake unit stops intake, and the sealing body moves downward to seal the discharge port under the condition of only being subjected to the first force.
[0040] like Figure 5 As shown, an embodiment of the present application also provides a batching device control method, comprising:
[0041] S1: Control the opening of the air inlet unit, the second force is greater than the first force, the sealing body moves upward, the discharge port leaks out, and the discharge port starts to discharge material;
[0042] Specifically, the opening and closing of the air inlet of the air channel can be controlled by controlling the conduction and closing of the solenoid valve, so as to provide a certain air pressure strength for the second chamber, so that the sealing body is subjected to a second upward force. Since the first force is smaller than the second force, the sealing body moves upward and separates from the discharge port of the discharge hole, and at the same time, the feed hole starts to provide the formula raw materials, and the discharge port of the discharge hole starts to discharge the materials.
[0043] S2: Control the air intake unit to open and close alternately according to a preset time, and the discharge port of the discharge hole sprays the material at intervals;
[0044] When the barrel to be batched approaches the preset target weight, the solenoid valve opens and closes at a certain frequency, controls the opening and closing of the air inlet channel, and sprays the material at intervals at the discharge hole. The size of the material droplets discharged from the discharge port is controlled by controlling the conduction frequency of the solenoid valve until the barrel to be batched reaches the preset target weight, and the barrel that has completed batching leaves the batching device and enters the next station;
[0045] S3: Control the operation of the first cylinder and the second cylinder, so that the material receiving body of the residual leakage recovery device cooperates with the outer wall of the feeding unit, the discharge port is connected with the recovery channel, and the negative pressure pump works to suck the residual material at the discharge port into the return barrel;
[0046] The residual material recovery unit is connected to the batching device, and the PLC controls the rise of the first cylinder and the second cylinder to connect the material receiving body with the discharge port of the batching valve, and the negative pressure pump starts to provide negative pressure to recover the residual material in the batching valve cavity into the recovery barrel.
[0047] S4: Control the air intake unit to close the air intake, and the discharge port of the discharge hole to close the spraying.
[0048] The PLC controls the solenoid valve to cut off the power supply, the air intake unit stops intake of air, and the sealing body moves downward to seal the discharge port under the condition of being subjected to only the first force.
[0049] The present invention provides a batching valve, which realizes three working states of batching by controlling the opening and closing of an air intake unit: in the first working state, the discharge hole sprays material normally; in the second working state, the discharge hole is closed for spraying material; in the third working state, the discharge hole sprays material at intervals. In the batching process, the accuracy and efficiency of batching are improved by implementing the three working modes.
[0050] The control method of the present invention is based on 485 bus communication technology to achieve single-point weight precision control and ensure injection accuracy. The PLC device controls the solenoid valve and the negative pressure pump, and the solenoid valve multi-line controls the nozzle, the telescopic cylinder and the lifting cylinder to achieve automatic control of the batching device.
[0051] A dosing device provided by the present invention includes a dosing valve and a residual material recovery device. The dosing valve can achieve precise dosing. After the dosing is completed, the residual material recovery device can recover the residual material in the cavity inside the valve body, avoiding liquid residue in the cavity of the dosing valve, saving time for cleaning the dosing and reducing raw material waste.
[0052] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims
1. A batching valve, characterized in that: include: A feeding unit, the feeding unit comprising: A feed hole, which is used to input formula raw materials, The discharge hole includes a discharge port, and the discharge port is used to eject the formula raw materials input from the feed hole. A sealing unit, which is connected to the feeding unit, comprises: A valve body, wherein the valve body is provided with an installation cavity, and the installation cavity is communicated with the discharge hole, a sealing body, one end of which is installed in the installation cavity and the other end of which extends to the discharge hole, A stroke adjustment mechanism, used for providing a first force to the sealing body and only when the first force is applied, the sealing body moves downward to block the discharge port of the discharge hole; An air intake unit, the air intake unit includes a first working mode, a second working mode and a third working mode. In the first working mode, the air intake unit opens air intake to provide a second force for the sealing body, the second force is opposite to the first force and is greater than the first force, the sealing body moves upward, and the discharge port of the discharge hole sprays material normally. In the second working mode, the air intake unit closes air intake, the sealing body is not subjected to the second force, the sealing body is only subjected to the first force, the sealing body moves downward to block the discharge port of the discharge hole, and the discharge port stops spraying material. In the third working mode, the air intake of the air intake unit is opened and closed alternately according to a preset time, the sealing body reciprocates up and down, so that the discharge port of the discharge hole sprays material at intervals. The valve body is provided with a second-order cylindrical hole, the second-order cylindrical hole includes a first hole and a second hole, the aperture of the first hole is larger than the aperture of the second hole, the sealing body is a three-order cylinder, including a first cylinder, a second cylinder and a third cylinder, the second cylinder is arranged between the first cylinder and the third cylinder, the second cylinder is installed in cooperation with the first hole, and the first hole is divided into a first chamber and a second chamber, the first cylinder is above the second cylinder, and is used to install the stroke adjustment mechanism, the third cylinder is arranged below the second cylinder, and is partially installed in the second hole, and its end extends through the discharge hole, the air intake unit includes an air intake valve body and a control valve, the air intake valve body is provided with an air channel, the air channel is communicated with the second chamber, and the control valve is used to control the opening and closing of the air intake of the air channel; The stroke adjustment mechanism includes a shell, a stroke adjustment sleeve, a spring preload rod and a spring. The shell is connected to the valve body, the stroke adjustment sleeve is installed inside the shell, the spring preload rod is installed inside the stroke adjustment sleeve, one end of the spring is in contact with the sealing body, and the other end of the spring is in contact with one end of the spring preload rod.
2. The dispensing valve according to claim 1, characterized in that: The discharge port is a closed conical hole, and a conical shaft is provided at the end of the sealing body. The shape of the closed conical hole is adapted to the shape of the conical shaft at the end of the sealing body. When the end of the sealing body moves to the discharge port, the conical shaft of the sealing body contacts the closed conical hole to seal the discharge port.
3. The dispensing valve according to claim 2, characterized in that: The material of the closed conical hole and the material of the conical shaft are both made of tungsten steel, and the surface of the closed conical hole and the surface of the conical shaft are both mirror-polished.
4. The dispensing valve according to claim 1, characterized in that: The control valve is a solenoid valve, and the solenoid valve is used to control the opening and closing of the air intake of the air channel.
5. The dispensing valve according to claim 4, characterized in that: When the solenoid valve controls the air inlet of the air channel to open, gas with a certain pressure enters the air channel, and the gas provides a certain air pressure for the second chamber. The second force is obtained from the air pressure. When the second force is greater than the first force provided by the stroke adjustment mechanism, the sealing body moves upward, and the discharge port of the discharge hole starts to discharge. After the solenoid valve controls the air inlet of the air channel to close, the solenoid valve stops providing a certain air pressure to the second chamber, and the sealing body is not affected by the second force but only by the first force provided by the stroke adjustment mechanism. The sealing body moves downward, and the discharge port of the discharge hole stops discharging.
6. A batching device, characterized in that: include: A dispensing valve as claimed in any one of claims 1 to 5; A residual leakage recovery unit is used to recover the residual material in the valve cavity of the batching valve, and the residual leakage recovery unit includes: A material receiving body is provided in the material receiving body, and one end of the recycling channel cooperates with the outer wall of the feeding unit so that the material discharge hole communicates with one end of the recycling channel. A negative pressure pump is connected to the other end of the recovery channel and is used to provide negative pressure for the material receiving body. A recovery bucket is used to receive the residual material extracted by the negative pressure pump. a first cylinder, wherein the first cylinder is fixed on a base, The second cylinder is connected to the piston rod of the first cylinder, the first cylinder is used to control the horizontal movement of the second cylinder, and the piston rod of the second cylinder is connected to the material receiving body to drive the material receiving body to move vertically up and down.
7. A batching device according to claim 6, characterized in that: A sealing groove is also provided at the matching position between the recovery channel and the outer wall of the feeding unit, and a sealing ring is installed in the sealing groove.
8. A batching device control method based on a batching device according to claim 7, characterized in that: include: S1: Control the opening of the air inlet unit, the second force is greater than the first force, the sealing body moves upward, the discharge port leaks out, and the discharge starts; S2: Controlling the air intake unit to open and close the air intake alternately according to a preset time, and the outlet of the outlet hole sprays the material at intervals; S3: Control the first cylinder and the second cylinder to work, so that the material receiving body of the residual leakage recovery unit cooperates with the outer wall of the feeding unit, the discharge port is connected with the recovery channel, and the negative pressure pump works to suck the residual material at the discharge port into the recovery barrel; S4: Control the air intake of the air intake unit to be closed, and the discharge port of the discharge hole to be closed for spraying.
Citation Information
Patent Citations
Batching valve and batching device
CN215796636U