A liquid hopper scale

Abstract

This invention discloses a liquid hopper scale, comprising a weighing component and an oil injection component. The weighing component includes: a weighing hopper for weighing oil, the bottom of which is connected to an oil storage hopper via an oil discharge ball valve; a circulation pipeline, the inlet and outlet of which are both connected to the weighing hopper, with the inlet connected to the bottom of the hopper; an excess oil hopper for storing oil on the circulation pipeline; a circulation pump for driving the oil flow within the circulation pipeline; and a pipeline valve for controlling the on / off state of the circulation pipeline, located between the weighing hopper and the excess oil hopper. The liquid hopper scale disclosed in this invention, with its circulation pipeline connected to the weighing hopper, allows excess oil to be channeled into the excess oil hopper on the circulation pipeline when the amount of oil weighed in the weighing hopper exceeds the formula requirements. This ensures the accuracy of the weighing of oil by the weighing hopper while maintaining the operation of the internal mixer, and maintains stable and quantitative oil injection into the internal mixer by the liquid hopper scale.

Description

Technical Field

[0001] This invention relates to the field of liquid material weighing and conveying equipment, and particularly to a liquid hopper scale. Background Technology

[0002] Internal mixing is an important process in the production of rubber products. During the internal mixing process, the internal mixer needs to inject mixing oil in a quantitative manner according to the formula requirements to carry out the mixing action. The existing internal mixers achieve the quantitative oil supply function through a liquid hopper scale. The liquid hopper scale weighs the mixing oil through a weighing component and then injects the oil through an oil injection component to complete the quantitative oil supply of the internal mixer.

[0003] According to the internal mixing formula requirements, after the weighing component completes the quantitative weighing of the internal mixing oil, it discharges the internal mixing oil into the oil storage hopper below through the oil discharge ball valve. After receiving the oil injection demand signal from the internal mixer, the oil injection component then pressurizes the internal mixing oil temporarily stored in the oil storage hopper into the internal mixer through the oil injection pump to complete the oil supply to the internal mixer. In this process, if the weighing component's internal mixing oil exceeds the weighing tolerance, or if the oil discharge ball valve malfunctions and cannot be opened and needs maintenance, it is difficult to remove the internal mixing oil from the weighing hopper. The internal mixing oil can only be discharged from the waste liquid pipe or directly injected into the internal mixer. The above solutions may lead to the forced interruption of the production process, reducing production efficiency, or make it difficult to guarantee the oil injection accuracy of the internal mixer, reducing the stability of rubber quality.

[0004] Therefore, how to maintain stable and quantitative oil injection into the internal mixer during its operation is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a liquid hopper scale to maintain stable and quantitative oil injection into the internal mixer during the operation of the internal mixer.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A liquid hopper scale includes a weighing component and an oil injection component, wherein the weighing component includes:

[0008] A weighing hopper for weighing oil, the bottom of which is connected to an oil storage hopper via an oil unloading ball valve;

[0009] The circulation pipeline has its inlet and outlet connected to the weighing hopper, with the inlet connected to the bottom of the weighing hopper. The circulation pipeline is equipped with an over-tolerance oil hopper for storing oil, a circulation pump for driving the oil to flow in the circulation pipeline, and a pipeline valve for controlling the opening and closing of the circulation pipeline. The pipeline valve is located between the weighing hopper and the over-tolerance oil hopper.

[0010] Preferably, in the above-mentioned liquid hopper scale, the excess oil hopper is connected to a drain pipe, and a drain valve is provided on the drain pipe.

[0011] Preferably, in the above-mentioned liquid hopper scale, the pipeline valve includes an angle seat valve, which opens when the oil needs to flow in the circulation pipeline.

[0012] Preferably, in the above-mentioned liquid hopper scale, the pipeline valve further includes a shut-off valve or ball valve for manually controlling the on / off state of the circulation pipeline and the flow rate.

[0013] Preferably, in the above-mentioned liquid hopper scale, the weighing component further includes a liquid level detection component for detecting the oil level in the out-of-tolerance oil hopper.

[0014] Preferably, in the above-mentioned liquid hopper scale, the liquid level detection component is a tuning fork level gauge or a capacitive level gauge. Preferably, in the above-mentioned liquid hopper scale, the oil injection assembly includes an oil collecting hopper, which is connected to the oil storage hopper via a pipeline, and the horizontal height of the oil collecting hopper is lower than that of the oil storage hopper to collect the oil in the oil storage hopper for injection into the internal mixer. A vent is provided at the top of the oil collecting hopper, and the oil collecting hopper is connected to the internal mixer via an oil injection hose, on which an oil injection pump for driving the oil into the internal mixer is provided.

[0015] Preferably, in the above-mentioned liquid hopper scale, a level gauge for detecting the discharge status of oil in the oil collecting hopper is provided at the discharge port of the oil collecting hopper.

[0016] Preferably, in the above-mentioned liquid hopper scale, a three-way valve is provided on the oil injection hose to bypass and connect to the calibration pipeline. The calibration pipeline is connected to the calibration oil cylinder. The calibration pipeline is manually connected to the three-way valve to discharge oil into the calibration oil cylinder and to verify the weighing accuracy of the liquid hopper scale.

[0017] As can be seen from the above technical solution, the liquid hopper scale provided by the present invention includes a weighing component and an oil injection component. The weighing component is used to quantitatively weigh and store the amount of oil required for a single operation of the internal mixer. The oil injection component is used to inject the oil weighed by the weighing component into the internal mixer. The weighing component includes a weighing hopper, an oil storage hopper, an oil discharge ball valve, and a circulation pipeline. The weighing hopper is connected to the oil supply pipeline to receive and weigh the oil. The bottom of the weighing hopper is connected to the oil storage hopper, and an oil discharge ball valve is provided between the weighing hopper and the oil storage hopper. The quantitatively weighed oil is transferred from the weighing hopper to the oil storage hopper via the oil discharge ball valve. Specifically, the circulation pipeline is a pipeline with both its inlet and outlet connected to the weighing hopper. Here, the inlet of the circulation pipeline is the port where the oil enters the circulation pipeline. Therefore, to ensure that the oil in the weighing hopper can smoothly enter the circulation pipeline, the inlet of the circulation pipeline is lower than the liquid level of the quantitatively weighed oil in the weighing hopper. Preferably, the inlet of the circulation pipeline is connected to the bottom of the weighing hopper. An over-tolerance oil hopper and a circulation... The system includes a circulating pump and a pipeline valve. The excess oil hopper stores the oil flowing in through the inlet of the circulating pipeline. The circulating pump drives the oil to flow through the circulating pipeline, while the pipeline valve controls the opening and closing of the circulating pipeline. Preferably, the pipeline valve is located on the circulating pipeline between the weighing hopper and the excess oil hopper to prevent oil from flowing into the excess oil hopper even when the pipeline valve is closed. In the event of a weighing error during the weighing process, if the weighed oil exceeds the formula requirement, the pipeline valve on the circulating pipeline is opened to allow an appropriate amount of oil to flow into the excess oil hopper. The pipeline valve is then closed promptly once the weighing reading in the weighing hopper meets the requirements. The oil stored in the excess oil hopper flows back into the weighing hopper through the outlet of the circulating pipeline for recycling when the internal mixer generates the next oil injection demand. If the weighed oil is less than the formula requirement, the valve on the oil supply pipeline connected to the weighing hopper is jogged to slowly inject oil into the weighing hopper to meet the quantitative weighing requirements.

[0018] The liquid hopper scale provided by this invention, by setting up a circulation pipeline connected to the weighing hopper outside the weighing hopper, allows for temporary storage of oil in the excess oil hopper of the circulation pipeline when a weighing error occurs during the weighing process of the weighing hopper. This eliminates the need for equipment shutdown and maintenance, and ensures the accuracy of quantitative weighing of oil in the weighing hopper. This ensures the stable operation of the internal mixer while achieving stable quantitative oil injection into the internal mixer through the liquid hopper scale. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the weighing component of a liquid hopper scale provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the oil injection assembly of the liquid hopper scale provided in an embodiment of the present invention;

[0022] Among them, 10 is the weighing component, 110 is the weighing hopper, 120 is the unloading ball valve, 130 is the oil storage hopper, 140 is the circulation pipeline, 150 is the over-tolerance oil hopper, 160 is the pipeline valve, 170 is the circulation pump, 180 is the drain pipe, 1810 is the drain valve, 190 is the liquid level detection component, 20 is the oil injection component, 210 is the oil collection hopper, 2110 is the breather, 220 is the oil injection hose, 230 is the oil injection pump, 240 is the liquid level gauge, 250 is the three-way valve, 260 is the calibration pipeline, and 270 is the calibration oil cylinder. Detailed Implementation

[0023] The core of this invention is to disclose a liquid hopper scale that maintains stable and quantitative oil injection into the internal mixer during its operation.

[0024] To enable those skilled in the art to better understand the present invention, embodiments of the present invention will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the configurations represented in the following embodiments are not limited to those necessary for the solution of the invention described in the claims.

[0025] like Figure 1 As shown, the liquid hopper scale provided in this embodiment of the invention includes a weighing component 10 and an oil injection component 20. The weighing component 10 is used to quantitatively weigh and store the amount of oil required for a single operation of the internal mixer. The oil injection component 20 is used to inject the oil weighed by the weighing component 10 into the internal mixer. Specifically, the weighing component 10 provided in this embodiment of the invention includes a weighing hopper 110, an oil storage hopper 130, an oil discharge ball valve 120, and a circulation pipeline 140. The weighing hopper 110 is connected to the oil supply pipeline to receive and weigh the oil supplied by the oil supply pipeline. The oil storage hopper 130 is disposed at the bottom of the weighing hopper 110 to receive the oil weighed by the weighing hopper 110. An oil discharge ball valve 120 is disposed between the weighing hopper 110 and the oil storage hopper 130. The oil discharge ball valve 120 is closed when the weighing hopper 110 is weighing the oil and is opened when the weighing hopper 110 is finished and the oil needs to be transferred to the oil storage hopper 130.

[0026] The circulation pipe 140 is a pipe located outside the weighing hopper 110, and both its inlet and outlet are connected to the weighing hopper 110. It should be noted that the inlet of the circulation pipe 140 refers to the opening where oil enters the circulation pipe 140. Therefore, to ensure that the oil in the weighing hopper 110 can smoothly enter the circulation pipe 140, the inlet of the circulation pipe 140 needs to be below the level of the measured amount of oil in the weighing hopper. Preferably, the inlet of the circulation pipe 140 is connected to the bottom of the weighing hopper 110, so that the oil has a greater pressure when flowing from the weighing hopper 110 into the circulation pipe 140, allowing the oil to flow into the circulation pipe 140. The process of 0 is smoother; at the same time, an over-tolerance oil hopper 150, a circulation pump 170 and a pipeline valve 160 are provided on the circulation pipeline 140. The over-tolerance oil hopper 150 is used to store the oil flowing in through the inlet of the circulation pipeline 140, the circulation pump 170 is used to drive the oil to flow smoothly in the circulation pipeline 140, and the pipeline valve 160 is used to control the opening and closing of the circulation pipeline 140. It should be noted that the pipeline valve 160 is preferably set on the circulation pipeline 140 between the weighing hopper 110 and the over-tolerance oil hopper 150, so as to prevent the oil in the weighing hopper 110 from still flowing into the over-tolerance oil hopper 150 when the pipeline valve 160 is closed.

[0027] The aforementioned circulation pipeline 140 is designed to address the issue of weighing errors occurring in the weighing hopper 110 without requiring the equipment to be shut down. Its specific operation includes at least the following: when weighing errors occur in the weighing hopper 110, if the weighed oil exceeds the formula requirements, the pipeline valve 160 on the circulation pipeline 140 is opened to allow an appropriate amount of oil from the weighing hopper 110 to flow into the error oil hopper 150. Once the weighing reading in the weighing hopper 110 meets the requirements, the pipeline valve 160 is promptly closed. The oil stored in the error oil hopper 150 is recycled back into the weighing hopper 110 through the outlet of the circulation pipeline 140 when the internal mixer generates the next oil injection demand, eliminating the need to discharge the oil in the weighing hopper 110 as waste liquid. When the weighed oil is less than the formula requirements, the valve on the oil supply pipeline connected to the weighing hopper 110 is jogged to slowly inject oil into the weighing hopper 110 to meet the quantitative weighing requirements of the weighing hopper 110.

[0028] It should be noted that the size of the excess oil hopper 150 can be designed according to production needs. In a specific embodiment of the present invention, in order to solve the problem that when the unloading ball valve 120 fails to open and the oil in the weighing hopper 110 cannot be discharged into the oil storage hopper 130 and can only be discharged as waste liquid, the capacity of the excess oil hopper 150 is not less than the volume of oil weighed in a single quantitative weighing in the weighing hopper 110. This is so that all the oil weighed in the weighing hopper 110 can be injected into the excess oil hopper 150 through the circulation pipeline 140. After the unloading ball valve 120 is repaired, the oil can be injected back into the weighing hopper 110 from the excess oil hopper 150 through the circulation pipeline 140, thus avoiding the waste of oil.

[0029] The liquid hopper scale provided in this embodiment of the invention, in order to maintain the stable operation of the internal mixer, connects the weighing hopper 110, used for quantitative weighing of oil, to an external circulation pipeline 140. Simultaneously, the circulation pipeline 140 is equipped with an excess oil hopper 150, a circulation pump 170, and a pipeline valve 160. When over-weighing occurs during the quantitative weighing of oil in the weighing hopper 110, the excess oil is stored in the excess oil hopper 150 through the circulation pipeline 140, thus conveniently and quickly achieving accurate weighing of oil by the weighing hopper 110. There is no need to shut down the equipment to drain excess oil. At the same time, according to the actual production needs, the size and capacity of the excess oil hopper 150 can be controlled to transfer all the oil in the weighing hopper 110 to the excess oil hopper 150 when the unloading ball valve 120 fails to open, so as to quickly repair or replace the unloading ball valve 120. After the repair or replacement of the unloading ball valve 120 is completed, the oil in the excess oil hopper 150 is injected into the weighing hopper 110 for subsequent production processes, thus avoiding the waste of oil.

[0030] Furthermore, in the liquid hopper scale provided in this embodiment of the invention, the bottom of the excess oil hopper 150 is connected to a drain pipe 180, and a drain valve 1810 for controlling the opening and closing of the drain pipe 180 is provided on the drain pipe 180. The excess oil hopper 150 is periodically drained through the drain pipe 180. At the same time, when the capacity of the excess oil hopper 150 is limited and the oil in the weighing hopper 110 needs to be discharged for the disassembly and maintenance of the unloading ball valve 120, the pipeline valve 160, the circulation pump 170 and the drain valve 1810 on the circulation pipeline 140 can be opened to directly discharge the oil in the weighing hopper 110 through the drain pipe 180.

[0031] Furthermore, in a specific embodiment of the present invention, the pipeline valve 160 includes an angle seat valve. The angle seat valve opens when the oil needs to flow in the circulation pipeline 140, that is, when the oil needs to be transferred from the weighing hopper 110 to the over-tolerance oil hopper 150, the angle seat valve remains open. During the weighing process of the weighing hopper 110, the process of transferring the oil from the weighing hopper 110 to the oil storage hopper 130, and the oil injection process of the internal mixer, the angle seat valve is closed. In order to simplify the operation of the liquid hopper scale provided in the embodiment of the present invention, the angle seat valve is preferably an automatically controlled valve, and the corresponding opening and closing state is adjusted according to the above-mentioned set conditions.

[0032] Based on the above embodiments, in order to prevent the oil in the weighing hopper 110 from continuously being injected into the over-tolerance oil hopper 150 due to a control failure of the automatically controlled angle seat valve, a manually controlled shut-off valve or ball valve is also provided in the pipeline valve 160. This valve can be used to temporarily shut off the circulation pipeline 140 when the components in the circulation pipeline 140, such as the angle seat valve, malfunction and need to be repaired or replaced. While working together with the angle seat valve to control the opening and closing of the circulation pipeline 140, it can also adjust the flow rate and volume of the oil in the circulation pipeline 140 by controlling the opening of the shut-off valve or ball valve. This allows for precise control of the oil discharge to ensure weighing accuracy when the over-tolerance of the oil weighed in the weighing hopper 110 is small.

[0033] In order to promptly identify the oil injection status inside the over-tolerance oil hopper 150 and prevent the over-tolerance oil hopper 150 from being filled and affecting the weighing of the weighing hopper 110, this embodiment of the invention provides a liquid level detection component 190 inside the over-tolerance oil hopper 150 to display the liquid level status inside the over-tolerance oil hopper 150 in a timely manner.

[0034] Furthermore, the liquid level detection component 190 can be a tuning fork type liquid level gauge or a capacitive type liquid level gauge. In a preferred embodiment of the present invention, the liquid level detection component 190 is preferably a tuning fork type liquid level gauge.

[0035] Furthermore, in existing technologies, due to structural limitations, the oil injection device is often located at a considerable distance from the internal mixer and connected to the internal mixer oil injector via a long conveying pipeline. Even under pumping conditions, some oil may adhere to the pipe wall over time, leading to inaccurate oil injection. To solve these technical problems, such as... Figure 2 As shown, in the liquid hopper scale provided in this embodiment of the invention, the oil filling assembly 20 includes an oil collecting hopper 210 for temporarily storing oil. The oil collecting hopper 210 is connected to the oil storage hopper 130 of the weighing assembly 10 via a pipe, and the horizontal height of the oil collecting hopper 210 is lower than that of the oil storage hopper 130, so that the oil in the oil storage hopper 130 can flow naturally into the oil collecting hopper 210 under the action of gravity. At the same time, a vent 2110 is provided at the top of the oil collecting hopper 210 to connect the inside and outside of the oil collecting hopper 210, so as to balance the air pressure inside and outside the oil collecting hopper 210, allowing the oil to flow into the vent. The process of oil hopper 210 and oil collection hopper 210 flowing out is smoother. Since oil collection hopper 210 is connected to oil storage hopper 130 through pipeline, the oil collection hopper 210 provided in this embodiment of the invention can be set closer to the internal mixer than the prior art. This allows oil collection hopper 210 to be connected to the internal mixer through a shorter oil injection hose 220. An oil injection pump 230 for driving oil in the internal mixer is provided on the oil injection hose 220. The shorter oil injection hose 220 can reduce oil loss, thereby improving the oil injection accuracy of the internal mixer.

[0036] It should be noted that after the internal mixer completes a single oil injection and the weighing hopper 110 completes the next oil weighing, the pipeline between the oil storage hopper 130 and the oil collection hopper 210 can be opened to provide sufficient time for the oil to be transferred from the oil storage hopper 130 to the oil collection hopper 210, ensuring that the oil is fully transferred. An oil pump can also be installed in the pipeline between the oil storage hopper 130 and the oil collection hopper 210 to accelerate the transfer speed of the oil.

[0037] Furthermore, in a specific embodiment of the present invention, a level gauge 240 is installed at the discharge port of the oil collecting hopper 210 to detect the oil level in the oil collecting hopper 210 at the discharge port. When the level gauge 240 shows a level of 0, it indicates that the oil filling of the internal mixer is completed.

[0038] Furthermore, in a specific embodiment of the present invention, a three-way valve 250 is also provided on the oil injection hose 220 to bypass and connect the oil injection hose 220 to the calibration pipeline 260. Simultaneously, the calibration pipeline 260 is connected to the calibration oil cylinder 270. When it is necessary to calibrate the weighing accuracy of the liquid hopper scale in this embodiment of the present invention, the three-way valve 250 is manually adjusted to connect the calibration pipeline 260, and all the weighed oil is discharged into the calibration oil cylinder 270. This allows for precise weighing of the oil in the calibration oil cylinder 270, and comparison with the formula amount set for weighing, thereby calibrating the weighing accuracy of the liquid hopper scale.

[0039] The terms "first," "second," "left side," and "right side," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid hopper scale, comprising a weighing component (10) and an oil injection component (20), characterized in that, The weighing assembly (10) includes: A weighing hopper (110) for weighing oil, the bottom of which is connected to an oil storage hopper (130) via an oil discharge ball valve (120). A circulation pipeline (140) is provided, the inlet and outlet of which are connected to the weighing hopper (110), and the inlet of the circulation pipeline (140) is connected to the bottom of the weighing hopper (110). The circulation pipeline (140) is provided with an excess oil hopper (150) for storing oil, a circulation pump (170) for driving the oil to flow in the circulation pipeline (140), and a pipeline valve (160) for controlling the opening and closing of the circulation pipeline (140). The pipeline valve (160) is located between the weighing hopper (110) and the excess oil hopper (150). The oil injection assembly (20) includes an oil collection hopper (210), which is connected to the oil storage hopper (130) via a pipeline. The oil collection hopper (210) is at a lower level than the oil storage hopper (130) to collect the oil in the oil storage hopper (130) for injection into the internal mixer. The top of the oil collection hopper (210) is provided with a vent (2110). The oil collection hopper (210) is connected to the internal mixer via an oil injection hose (220). The oil injection hose (220) is provided with an oil injection pump (230) for driving the oil into the internal mixer.

2. The liquid hopper scale as described in claim 1, characterized in that, The excess oil hopper (150) is connected by a bypass pipe (180), and a drain valve (1810) is provided on the drain pipe (180).

3. The liquid hopper scale as described in claim 1, characterized in that, The pipeline valve (160) includes an angle seat valve that opens when oil needs to flow within the circulation pipeline (140).

4. The liquid hopper scale as described in claim 3, characterized in that, The pipeline valve (160) also includes a shut-off valve or ball valve for manually controlling the opening and closing of the circulation pipeline (140) and the flow rate.

5. The liquid hopper scale as described in claim 1, characterized in that, The weighing assembly (10) also includes a level detection component (190) for detecting the oil level in the over-tolerance oil hopper (150).

6. The liquid hopper scale as described in claim 5, characterized in that, The liquid level detection component (190) is a tuning fork liquid level gauge or a capacitive liquid level gauge.

7. The liquid hopper scale as described in claim 1, characterized in that, The discharge port of the oil collecting hopper (210) is equipped with a level gauge (240) for detecting the discharge status of oil in the oil collecting hopper (210).

8. The liquid hopper scale as described in claim 1, characterized in that, A three-way valve (250) is provided on the oil injection hose (220) to bypass and connect to the calibration pipeline (260). The calibration pipeline (260) is connected to the calibration oil cylinder (270). The calibration pipeline (260) of the three-way valve (250) is manually connected to discharge the oil into the calibration oil cylinder (270) and to verify the weighing accuracy of the liquid hopper scale.

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