CN215796636U - Batching valve and batching device - Google Patents

Abstract

The utility model discloses a proportioning valve, comprising: the sealing device comprises a feeding unit and a sealing unit, wherein the feeding unit comprises a feeding hole and a discharging hole, the sealing unit is connected with the feeding unit and comprises a valve body, a sealing body, a stroke adjusting mechanism and an air inlet unit, the valve body is provided with an installation cavity, the installation cavity is communicated with the discharging hole, one end of the sealing body is installed in a gap of the installation cavity, the other end of the sealing body extends to the discharging hole, the stroke adjusting mechanism is used for providing a first acting force for the sealing body, and the sealing body moves downwards to seal a discharging hole of the discharging hole only under the condition of the first acting force; the air inlet unit comprises a first working mode, a second working mode and a third working mode, wherein in the first working mode, the discharge hole of the discharge hole is subjected to normal spraying, in the second working mode, the material sealing body moves downwards to seal the discharge hole of the discharge hole, the discharge hole stops spraying, and in the third working mode, the material sealing body reciprocates up and down to enable the discharge hole to spray materials at intervals.

Description

Batching valve and batching device

Technical Field

The utility model relates to the field of spice production equipment, in particular to a batching valve and a batching device.

Background

In the flavor and fragrance industry, a large formula is often composed of a plurality of different types of raw materials according to a certain formula proportion. At present, two methods are used for proportioning a large formula according to a certain proportion:

the first manual batching method is characterized in that batching personnel sequentially takes out raw materials according to a formula proportion, a scale is reset before each raw material is injected, then specified weight is sequentially injected into a mixing barrel, and after all formula raw materials are injected into the mixing barrel, different raw materials are fully mixed, so that batching is finished. In the process of material injection, liquid is easy to oscillate in a charging basket to cause unstable weight value, the attention of operators needs to be highly concentrated, when a weighing numerical value is stared, hands need to control rhythm to wait for stable weight value, the hands are easy to shake, high-precision material proportioning is difficult to realize, and the consistency of the proportioning of raw materials of different batches is difficult to guarantee; operators directly contact the formula, and the confidentiality of enterprise core confidentiality is poor; the requirement on physical strength of operators is high, the labor intensity is high, fatigue is easy to occur in long-term operation, and the efficiency is low; if only one raw material has deviation of more than 5 per mill of the added weight, all the raw materials injected before are scrapped, and the probability of large waste is high; liquid raw materials are usually very volatile, and pungent smell can cause the injury to operating personnel respiratory track, and operational environment is comparatively abominable. In conventional dosing valves there must be residual liquid in each dosing process and this residual waste will increase the raw material costs to a large extent.

Secondly, the dosing is carried out by controlling a dosing valve, the operation and control mode of the dosing valve determine the injection speed and precision of the raw materials, and the current method mainly adopts a normally open dosing valve, and when the weight or volume of the liquid is about to reach a preset value, the preset value is approached by slowing down the flow speed. Because the liquid injection barrel can oscillate to cause unstable metering data, the high-precision liquid injection process needs long data stabilization waiting time. To ensure the dosing accuracy, the closer to the predetermined value, the more the number of waiting times increases, resulting in lower efficiency.

Therefore, there is a need to improve the prior art and to provide a new dispensing valve structure to improve the dispensing accuracy and efficiency.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a batching valve, a batching device and a control method of the batching device, and solves the problems of low batching precision, low efficiency and material leakage.

The embodiment of this application provides a distributing valve includes: the feeding unit comprises a feeding hole, the feeding hole is used for providing formula raw materials for the feeding hole, the discharging hole comprises a discharging hole, the discharging hole is used for ejecting the formula raw materials provided by the feeding hole, the material sealing unit is connected with the feeding unit, the feeding unit comprises a valve body, the valve body is provided with an installation cavity, the installation cavity is communicated with the discharging hole, a material sealing body is installed in the installation cavity in a clearance mode, one end of the material sealing body extends to the discharging hole, and a stroke adjusting mechanism is used for providing a first acting force for the material sealing body and sealing the discharging hole by the material sealing body only under the condition of the first acting force; the air inlet unit comprises a first working mode, a second working mode and a third working mode, wherein in the first working mode, the air inlet unit opens air inlet to provide a second acting force for the sealing material body, the second acting force is opposite to the first acting force in direction and larger than the first acting force, the sealing material body moves upwards, the material outlet of the material outlet hole is subjected to normal spraying, in the second working mode, the air inlet unit closes air inlet, the sealing material body is free from the second acting force, the sealing material body is only subjected to the first acting force, the sealing material body seals the material outlet of the material outlet hole, and the material outlet hole stops spraying.

Optionally, the discharge port is a closed conical hole, the end of the sealing material body is provided with a conical shaft, the shape of the closed conical hole is matched with the shape of the conical shaft at the end of the sealing material body, and when the end of the sealing material body moves to the discharge port, the conical shaft of the sealing material body is in contact with the closed conical hole to seal the discharge port.

Optionally, the material at the closed conical hole and the material used by 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 subjected to mirror polishing.

Optionally, a second-order cylindrical hole is formed in the valve body, the second-order cylindrical hole comprises a first hole and a second hole, the aperture of the first hole is larger than that of the second hole, the sealing material body is a third-order cylinder and comprises 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 a manner of matching with the first hole and divides the first hole into a first cavity and a second cavity, the first cylinder is arranged above the second cylinder and used for installing a stroke adjusting mechanism, the third cylinder is arranged below the second cylinder, a part of the third cylinder is installed in the second hole, the end of the third cylinder penetrates through the second hole to extend to the discharge hole, the air inlet unit comprises an air inlet valve body and a control valve, the air inlet valve body is provided with an air passage, the air passage is communicated with the second cavity, and the control valve is used for controlling the air inlet and the air outlet of the air passage to be opened and closed.

Optionally, the control valve is an electromagnetic valve, and the electromagnetic valve is used for controlling the opening and closing of the air inlet of the air channel.

Optionally, after the electromagnetic valve controls the air inlet of the air channel to be opened, the air channel enters air with a certain pressure, the air provides certain air pressure for the second chamber, a second acting force is obtained through the air pressure, when the second acting force is larger than a first acting force provided by the stroke adjusting mechanism, the sealing material body moves upwards, the discharge hole of the discharge hole starts discharging, after the electromagnetic valve controls the air inlet of the air channel to be closed, the air inlet stops providing certain air pressure for the second chamber, the sealing material body does not receive the second acting force and only receives the first acting force provided by the stroke adjusting mechanism, the sealing material body moves downwards, and the discharge hole of the discharge hole stops discharging.

Optionally, the stroke adjusting mechanism comprises a shell, a stroke adjusting sleeve, a spring pre-tightening rod and a spring, the shell is connected with the valve body, the stroke adjusting sleeve is installed inside the shell, the spring pre-tightening rod is installed inside the stroke adjusting sleeve, one end of the spring is in contact with the sealing material body, and the other end of the spring is in contact with one end of the spring pre-tightening rod.

Optionally, a first sealing groove is formed in the second cylinder, and a first sealing ring is mounted on the first sealing groove.

The application also provides a dosing unit, includes: a dispensing valve as described above; 8. a dispensing apparatus, comprising: the batching valve comprises a residual leakage recovery unit for recovering residual materials in the valve cavity of the batching valve, the residual leakage recovery unit comprises a material receiving body, a recovery channel is arranged in the material receiving body, one end of the recovery channel is matched with the outer wall of the feeding unit, so that the discharge hole is communicated with one end of the recovery channel, a negative pressure pump, the negative pressure pump is connected with the other end of the recovery channel and is used for providing negative pressure for the material receiving body, the recovery barrel, used for receiving the residue pumped by the negative pressure pump, a first cylinder fixed on a base, a second cylinder, the second air cylinder is connected with a piston rod of the first air cylinder, the first air cylinder is used for controlling the horizontal movement of the second air cylinder, and a piston rod of the second cylinder is connected with the material receiving body and used for driving the material receiving body to vertically move up and down.

Optionally, the recycling channel at the matching position of the outer wall of the feeding unit is further provided with a third sealing groove, and a third sealing ring is installed in the third sealing groove.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model provides a batching valve which realizes three working states of batching by controlling the opening and closing of an air inlet unit: in a first working state, a discharge port is subjected to normal spraying; the material is spouted in the second operating condition, discharge gate closure, and the material is spouted at third operating condition, discharge gate interval, at the batching in-process, through implementing three kinds of mode, has improved the precision and the efficiency of batching.

2. According to the batching device provided by the utility model, after batching is finished, the residual materials in the batching valve cavity can be recycled through the residual material recycling unit, so that the waste of raw materials is reduced, and the production cost is saved.

Drawings

FIG. 1 is a schematic view of a configuration of a dispensing valve as an embodiment;

FIG. 2 is a schematic view of a dispensing valve of FIG. 1 with the outlet normally open for dispensing;

FIG. 3 is a schematic view of the dispensing valve of FIG. 1 with the outlet normally closed and the dispensing position closed;

FIG. 4 is a schematic view of a structure of a dispensing unit according to an embodiment;

FIG. 5 is a flowchart of a dosing unit control method as one embodiment;

in the figure: 1: a dosing valve; 2: a dosing device; 11: a feed unit; 12: a material sealing unit; 111: a feed port; 112: a discharge hole; a discharge port: 1121; a valve body: 121, a carrier; second-order cylindrical hole: 1211; a first hole: 1211 a; a second hole: 1211 b; 122: a sealing body; 1221: a first cylinder; 1222: a second cylinder; 1223: a third cylinder; 123: a stroke adjustment mechanism; 1231: a housing; 1232: a stroke adjusting sleeve; 1233: a spring preset lever; 1234 a spring; 124: an air intake unit; 1241: an intake valve body; 1242: a control valve;

21: a material receiving body; 22: a negative pressure pump; 23: a recycling bin; 24: a first cylinder; 25: a second cylinder; 211: a recovery channel;

Detailed Description

The present invention will be described in detail with reference to the specific embodiments shown in the drawings, which are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to the specific embodiments are included in the scope of the present invention.

As shown in fig. 1 to 3, the present application discloses a batching valve, which includes a feeding unit 11 and a sealing unit 12, wherein the feeding unit 11 includes a feeding hole 111, the feeding hole 111 is used for inputting a formula raw material, the discharging hole 112 includes a discharging hole 1121 for ejecting the formula raw material provided by the feeding hole 111, 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 adjusting mechanism 123 and an air intake unit 124, the valve body 121 is provided with a mounting cavity, the mounting cavity is communicated with the discharging hole 112, one end of the sealing body 122 is mounted in the gap mounting cavity, and the other end of the sealing body extends to the discharging hole 112, the stroke adjusting mechanism 123 is used for providing a first acting force F1 for the sealing body 122, and only under the condition of the first acting force F1, the sealing body 122 moves down to seal the discharging hole 1121 of the discharging hole 112; the air inlet unit 124 comprises a first working mode, a second working mode and a third working mode, in the first working mode, the air inlet unit opens air inlet to provide a second acting force F2 for the sealing material body 122, the second acting force F2 is opposite to the first acting force F1 in direction, the second acting force F2 is larger than the first acting force F1, the sealing material body 122 moves upwards, the material outlet 112 performs normal spraying, in the second working mode, the air inlet unit 124 closes air inlet, the sealing material body 122 is not subjected to the second acting force F2, the sealing material body 122 is only subjected to the first acting force F1, the sealing material body 122 seals the material outlet of the material outlet 112, and the material outlet 112 stops spraying, in the third working mode, the air inlet opening and closing of the air inlet unit 124 are performed alternately according to a preset time, the sealing material body 122 reciprocates up and down, and the material outlet of the material outlet 112 performs spraying at intervals.

In order to enable the sealing material body 122 to be in contact with the discharge hole, the sealing material body 122 can effectively seal the discharge hole, and avoid the phenomenon of material leakage, in some implementations, the discharge hole 1121 is a closed conical hole, a conical shaft is arranged at the end of the sealing material body 122, the shape of the closed conical hole is adapted to the shape of the conical shaft at the end of the sealing material body, and when the end of the sealing material body 122 moves to the discharge hole 1121, the conical shaft of the sealing material body 122 is in contact with the closed conical hole, so as to seal the discharge hole; no ingredient leaks out after the end of the sealing body 122 contacts the discharge hole 1121. In the process of material mixing, in order to accurately perform material mixing, the air inlet unit 124 is in a third working mode, the air inlet opening and closing of the air inlet unit 124 are alternately performed according to a preset time, the material sealing body 122 reciprocates up and down to contact the material outlet, the material outlet of the material outlet 112 is subjected to material spraying at intervals, in this case, the sealing material body 122 and the discharge hole 1121 may be frequently contacted and separated, in order to reduce the abrasion loss of the sealing body 122 and the discharge hole 1121, the material used for the sealing body 122 and the discharge hole 1121 is a material with better abrasion resistance, in some embodiments, the sealing material body 122 and the discharge hole 1121 are made of tungsten steel, and it should be noted that, in this embodiment, the sealing material body and the discharge hole are not limited to tungsten steel, it can be understood that the material of the discharge hole 1121 and the sealing material body 122 is only required to be wear-resistant, and the surface of the closed conical hole and the surface of the conical shaft are both mirror-polished. Therefore, by performing mirror polishing treatment with the tungsten steel material, the precision of the roughness of the surfaces of the sealing material body 122 and the discharge hole 1121 is improved, and the situation of material seepage after the sealing material body 122 contacts the discharge hole 1121 is reduced.

Referring to fig. 1 again, in some embodiments, a second-order cylindrical hole 1211 is formed in the valve body 121, the second-order cylindrical hole 1211 includes a first hole 1211a and a second hole 1211b, the first hole 1211a has a larger diameter than the second hole 1211b, the sealant 122 is a third-order cylindrical body including a first cylindrical body 1221, a second cylindrical body 1222 and a third cylindrical body 1223, the second cylindrical body 1222 is disposed between the first cylindrical body 1221 and the third cylindrical body 1223, the second cylindrical body 1222 is installed to match with the first hole 1211a and divides the first hole 1211a into a first chamber and a second chamber, the first cylindrical body 1221 is disposed above the second cylindrical body 1222 for installing the stroke adjustment mechanism 123, the third cylindrical body 1223 is disposed below the second cylindrical body 1222, is partially installed in the second hole 1211b, and has an end portion extending to the discharge hole, the air inlet unit includes an air inlet valve 1241 and a control valve 1242, the air inlet valve 1241 is provided with an air passage, the air passage communicates with the second chamber, and the control valve 1241 is used to control the opening and closing of the air intake of the air passage. In some embodiments, in order to enhance the air tightness of the second chamber, a first sealing groove is formed in the second cylinder, a first sealing ring is installed on the first sealing groove, a second sealing groove is formed in one end of the discharge hole, which is in contact with the first hole 1211b, of the feeding unit 11, a second sealing ring is installed in the second sealing groove, when the air inlet unit opens to provide gas with a certain pressure to the second chamber, the air pressure in the second chamber is maintained in a stable range, and further, a second acting force applied to the second cylinder is maintained in a stable range, so that the situation that the second acting force is reduced due to pressure relief of the second chamber in a material blending process is effectively avoided, and if the second acting force is smaller than the first acting force, an original normally opened discharge port is changed into a material-sealed and blocked state, and the material blending efficiency is affected.

Referring to fig. 1 to 3 again, the first acting force F1 is a constant acting force on the second cylinder 1222, in this embodiment, the first acting force is an elastic force provided by a spring, the stroke adjustment mechanism 123 includes a housing 1231, a stroke adjustment sleeve 1232, a spring pre-tightening 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 thread structure, the spring pre-tightening rod 1233 is installed inside the stroke adjustment sleeve 1232 through a second thread structure, one end of the spring 1234 is in contact with the first cylinder 1221, and the other end of the spring 1234 is in contact with one end of the spring pre-tightening rod 1233. The magnitude of the first acting force F1 can be adjusted through a spring pre-tightening rod or a stroke adjusting sleeve, and in the actual use process, the magnitude of the first acting force F1 is adjusted to enable the value of the first acting force F1 to be larger than that of the second acting force F2. In this embodiment, the control valve 1242 is an electromagnetic valve, and the opening and closing of the air passage is controlled by the electromagnetic valve. More specifically, after the solenoid valve controls the air inlet of the air passage to be opened, the air passage enters air with a certain pressure, the air provides a certain air pressure for the second chamber, the second acting force F2 is obtained by the air pressure, when the second acting force F2 is greater than the first acting force F1 provided by the stroke adjusting mechanism, the sealing body 122 moves upwards, the discharge hole 1121 of the discharge hole 112 starts discharging, after the solenoid valve controls the air inlet of the air passage to be closed, the air pressure provided to the second chamber is stopped, the sealing body 122 is not subjected to the second acting force F2, only the first acting force F1 provided by the stroke adjusting mechanism 123 is applied, the sealing body 122 moves downwards, and the discharge hole 1121 of the discharge hole 112 stops discharging. Through opening and closing of control air intake unit, realize three kinds of operating condition of batching: in the first working state, the discharge hole is used for carrying out normal spraying; the second operating condition, the discharge opening is closed and is spouted the material, and the third operating condition, the discharge opening interval spout the material, at the batching in-process, through implementing three kinds of mode, has improved the precision and the efficiency of batching.

In the embodiment, the electromagnetic valve is controlled by a PLC, the size of a single-point injection raw material drop is accurately controlled by controlling the on-off frequency of the electromagnetic valve, a specific control mode adopts a threshold value control strategy to realize the switching of the control modes of normally-open and dotting main materials, a linear equation of controlling the air flow valve with the voltage of 0-10V and the material pressure range of 0-950 Pa is established, the effective control range of the material pressure and the single-point weight is intercepted, a single-point weight off-line and on-line calibration method is combined, the single-point weight accurate control is realized based on a 485 bus communication technology, and the material injection precision is ensured.

As shown in fig. 3, a specific embodiment of the present application further provides a dispensing apparatus, including: in the above dispensing valve 1 and the residual leakage recovery unit 2, the residual leakage recovery unit is connected with the dispensing valve 1 and is used for recovering residual materials in a valve cavity of the dispensing valve 1, and the residual leakage recovery unit 2 comprises a material receiving body 21, a negative pressure pump 22, a recovery barrel 23, a first air cylinder 24 and a second air cylinder 25; a recovery channel 211 is arranged in the material receiving body 21, one end of the recovery channel 211 is matched with the outer wall of the feeding unit 11, so that the discharge hole 112 is communicated with one end of the recovery channel 211, the negative pressure pump 22 is connected with the other end of the recovery channel 211, the negative pressure pump 22 is used for providing negative pressure for the material receiving body 21, the recovery barrel 23 is connected with one end of the negative pressure pump 22 and used for receiving residual materials extracted by the negative pressure pump 22, the first cylinder 24 is fixed on a base, the second cylinder 25 is connected with a piston rod of the first cylinder 24, the first cylinder 24 is used for controlling 25 horizontal movement of the second cylinder, and a piston rod of the second cylinder 25 is connected with the material receiving body 21 and used for driving the material receiving body 21 to vertically move up and down. In a preferred embodiment, a third sealing groove is further provided on the outer wall of the recycling channel 211 at the position where the recycling channel is matched with the feeding unit 11, and a third sealing ring is installed in the third sealing groove. In the embodiment, the recycling channel 211 is arranged in the material receiving body 21, wherein the aperture of the recycling channel at one end communicated with the discharge hole 112 is larger than that of the discharge hole 112, so that after the material receiving body 21 is lifted to be matched and connected with the batching valve 1 when the second cylinder 25 works, the hole of the discharge hole 112 is completely communicated with the hole of the recycling channel 211, and when the negative pressure pump works, the residual materials in the batching valve body can be recycled into the recycling bin more efficiently.

The above-mentioned batching valve and dosing unit still in order to produce the line with the batching and suit, can set up multiunit dosing unit and batching on the automatic production line of batching, can retrieve the defective material in the unit will batching valve through the defective material after the batching is accomplished and absorb, avoided the manual work to wash alone the batching valve device, saved manpower this, improved the efficiency of batching simultaneously.

The specific workflow of the batching plant can be referred to as follows: the material mixing device is used independently or in cooperation with a production line, when the material mixing device is matched with the production line for mixing, the material mixing device is arranged after a material barrel to be mixed enters the production line, the material barrel to be mixed moves to the position of the material mixing device, in order to accurately detect whether the material barrel with the material mixing is in place or not, a position sensor can be arranged at the position of the material mixing valve device, the position of the material barrel to be mixed moves the position of the material mixing valve, the signal of the position sensor is transmitted to the PLC, the PLC sends an instruction for opening an air channel to the electromagnetic valve, the air channel provides certain air pressure for a second cavity of the material mixing valve, so that the material sealing body is simultaneously influenced by a second acting force, and as the value of the second acting force is greater than that of the first acting force, the material sealing body moves upwards to be separated from a discharge port, the discharge port starts to normally open for discharging, when the material mixing is finished quickly, in order to more accurately achieve the weight of the material mixing, the PLC controls the electromagnetic valve to be switched on and off according to a certain frequency, so that the air inlet unit can regularly perform air inlet and stop air inlet, and the material is sprayed at intervals through the discharge holes. The size of the gob discharged from the discharge port is controlled by controlling the conduction frequency of the electromagnetic valve, the size of the gob discharged from the discharge port at a single point can be calibrated off line, and calibrated data are input to the PLC; PLC is based on 485 bus communication techniques to solenoid valve control, and the PLC control solenoid valve has guaranteed discharge gate single-point weight accuracy like this, guarantees to annotate the material precision.

After the batching is completed, the storage bucket is transported away from the batching device, and simultaneously, the position signal sensor transmits a signal to the PLC, the PLC controls to stop feeding at the feeding hole to feed, the first cylinder of the residual material recovery unit drives the second cylinder to horizontally move to the lower part of the batching device, the second cylinder drives the material receiving body to be butted with the batching valve, the negative pressure pump starts to work, the residual material in the batching valve is extracted into the recovery bucket, after the residual material is recovered, the second cylinder of the residual material recovery unit descends to drive the material receiving body to be separated from the batching valve body, the first cylinder drives the material receiving body to horizontally move to reset, at the moment, the electromagnetic valve is powered off, the air inlet unit stops air inlet, and the material sealing body only receives a first acting force and downwards moves to seal the discharging hole.

As shown in fig. 5, an embodiment of the present application further provides a dosing device control method, including:

s1, controlling the opening of the air inlet unit, wherein the second acting force is larger than the first acting force, the material sealing body moves upwards, the material outlet leaks, and the material outlet starts to discharge;

specifically, the opening and closing of air inlet of the air channel can be controlled by controlling the conduction and the closing of the electromagnetic valve, certain air pressure strength is provided for the second chamber, the sealing body is subjected to an upward second acting force, the sealing body moves upwards to be separated from the discharge hole of the discharge hole due to the fact that the first acting force is smaller than the second acting force, meanwhile, the formula raw materials are provided by the feed hole, and the discharge hole of the discharge hole starts to discharge;

s2, controlling the air inlet opening and closing of the air inlet unit to be performed alternately according to a preset time, and spraying materials at intervals at the discharge holes of the discharge holes;

when the charging bucket of waiting to batching is close preset target weight, the solenoid valve opens and closes according to certain frequency, and the opening and closing of control inlet channel admit air, the discharge opening interval spouts the material. Controlling the size of the material drops discharged from the discharge port by controlling the conduction frequency of the electromagnetic valve until the barrel to be proportioned is equal to the preset target weight, and enabling the material barrel which has finished the batching to leave the batching device to enter a lower station;

s3, controlling the work of the first cylinder and the second cylinder to enable a material receiving body of the residual leakage recovery device to be matched with the outer wall of the feeding unit, enabling a discharge port to be communicated with the recovery channel, and enabling a negative pressure pump to work to suck residual materials at the discharge port into a material return barrel;

butt joint is carried out with defective material recovery unit and dosing unit, PLC control first cylinder with the rise of second cylinder makes the material receiving body and the discharge gate of batching valve be connected and communicate with each other, and the negative pressure pump begins to provide the negative pressure and retrieves the defective material in the batching valve cavity to the recycling bin in.

And S4, controlling the air inlet of the air inlet unit to be closed, and closing the material outlet of the discharge hole to spray the material.

The PLC controls the electromagnetic valve to be powered off, the air inlet unit stops air inlet, and the material sealing body moves downwards to seal the discharge hole under the condition that the material sealing body only receives a first acting force.

The utility model provides a batching valve, which realizes three working states of batching by controlling the opening and closing of an air inlet unit: in the first working state, the discharge hole is used for carrying out normal spraying; the second operating condition, the discharge opening is closed and is spouted the material, and the third operating condition, the discharge opening interval spout the material, at the batching in-process, through implementing three kinds of mode, has improved the precision and the efficiency of batching.

The control method is based on a 485 bus communication technology, realizes the accurate control of single-point weight and ensures the precision of material injection. The PLC equipment controls the electromagnetic valve and the negative pressure pump, the electromagnetic valve controls the spray head, the telescopic cylinder and the lifting cylinder in a multi-line mode, and automatic control of the batching device is achieved.

According to the batching device, the batching valve and the residual material recovery device are included, accurate batching can be achieved through the batching valve, after batching is completed, residual materials in a cavity in the valve body can be recovered through the residual material recovery device, liquid is prevented from remaining in the cavity of the batching valve, time for washing batching is saved, and raw material waste is reduced.

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 utility model as disclosed in the accompanying claims.

Claims (10)

1. A dispensing valve, comprising:

a feed unit comprising,

a feed port for inputting the raw materials of the formula,

a discharge hole, wherein the discharge hole comprises a discharge port, the discharge port is used for ejecting the formula raw materials input by the feed hole,

a material sealing unit connected with the feeding unit and comprising,

the valve body is provided with an installation cavity which is communicated with the discharge hole,

one end of the sealing body is arranged in the mounting cavity, the other end of the sealing body extends to the discharge hole,

the stroke adjusting mechanism is used for providing a first acting force for the sealing material body, and only under the condition of the first acting force, the sealing material body moves downwards to seal a discharge hole of the discharge hole;

the air inlet unit comprises a first working mode, a second working mode and a third working mode, wherein in the first working mode, the air inlet unit opens air inlet to provide a second acting force for the sealing body, the second acting force is opposite to the first acting force in direction and is larger than the first acting force, the sealing body moves upwards, the discharge hole of the discharge hole is subjected to normal spraying, in the second working mode, the air inlet unit closes air inlet, the sealing body is free from the second acting force, the sealing body is only subjected to the first acting force, the sealing body moves downwards to seal the discharge hole, the discharge hole stops spraying, in the third working mode, the air inlet unit alternately opens and closes air inlet according to a preset time, and the sealing body reciprocates up and down, and spraying the materials at intervals from the discharge hole of the discharge hole.

2. The dispensing valve of claim 1, wherein: the discharge port is a closed conical hole, a conical shaft is arranged at the end part of the sealing material body, the shape of the closed conical hole is matched with that of the conical shaft at the end part of the sealing material body, and when the end part of the sealing material body moves to the discharge port, the conical shaft of the sealing material body is contacted with the closed conical hole to seal the discharge port.

3. The proportioning valve of claim 2 wherein: and the material of the closed conical hole and the material of the conical shaft are both tungsten steel materials, and the surface of the closed conical hole and the surface of the conical shaft are both subjected to mirror polishing treatment.

4. The dispensing valve of claim 1, wherein: the valve body is internally provided with a second-order cylindrical hole, the second-order cylindrical hole comprises a first hole and a second hole, the aperture of the first hole is larger than that of the second hole, the sealing body is a third-order cylinder and comprises 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 matched with the first hole and divides the first hole into a first cavity and a second cavity, the first cylinder is arranged above the second cylinder and is used for installing the stroke adjusting mechanism, the third cylinder is arranged below the second cylinder, part of the third cylinder is arranged in the second hole, the end part of the third cylinder extends to the discharge hole, the air inlet unit comprises an air inlet valve body and a control valve, the air inlet valve body is provided with an air passage, and the air passage is communicated with the second cavity, the control valve is used for controlling the opening and closing of the air inlet of the air channel.

5. The dispensing valve of claim 4, wherein: the control valve is an electromagnetic valve which is used for controlling the opening and closing of the air inlet of the air channel.

6. The dispensing valve of claim 5, wherein: when the electromagnetic valve controls the air inlet of the air channel to be opened, the air channel enters air with a certain pressure, the air provides a certain air pressure for the second chamber, the second acting force is obtained through the air pressure, when the second acting force is larger than the first acting force provided by the stroke adjusting mechanism, the sealing body moves upwards, the discharge hole of the discharge hole starts to discharge, after the electromagnetic valve controls the air inlet of the air channel to be closed, the air channel stops providing a certain air pressure for the second chamber, the sealing body is free of the second acting force, only the first acting force provided by the stroke adjusting mechanism is applied to the sealing body, the sealing body moves downwards, and the discharge hole of the discharge hole stops discharging.

7. The dispensing valve of claim 4, wherein: the second cylinder is provided with a first sealing groove, and a first sealing ring is mounted on the first sealing groove.

8. The dispensing valve of claim 1, wherein: the stroke adjusting mechanism comprises a shell, a stroke adjusting sleeve, a spring pre-tightening rod and a spring, the shell is connected with the valve body, the stroke adjusting sleeve is installed inside the shell, the spring pre-tightening rod is installed inside the stroke adjusting sleeve, one end of the spring is in contact with the sealing material body, and the other end of the spring is in contact with one end of the spring pre-tightening rod.

9. A dispensing apparatus, comprising:

a dispensing valve as claimed in any one of claims 1 to 8;

the residual leakage recovery unit is used for recovering residual materials in the valve cavity of the proportioning valve and comprises a residual leakage recovery unit,

a recovery channel is arranged in the material receiving body, one end of the recovery channel is matched with the outer wall of the feeding unit, so that the discharge hole is communicated with one end of the recovery channel,

the negative pressure pump is connected with the other end of the recovery channel and used for providing negative pressure for the material receiving body,

the recycling bin is used for receiving the residual materials pumped by the negative pressure pump,

a first cylinder fixed on a base,

the second cylinder is connected with a piston rod of the first cylinder, the first cylinder is used for controlling the second cylinder to move in the horizontal direction, and the piston rod of the second cylinder is connected with the material receiving body and used for driving the material receiving body to vertically move up and down.

10. A dosing device as claimed in claim 9, characterized in that: and a third sealing groove is further formed in the recovery channel at the matching position of the outer wall of the feeding unit, and a third sealing ring is installed in the third sealing groove.

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