Metering pump online monitoring cylinder and its secondary monitoring method for materials

Abstract

The present invention relates to an online monitoring cylinder for a metering pump, comprising a buffer tank, a cylinder, a connecting shaft and a scale sensor; a piston is provided in the buffer tank, the top of the piston is connected to the lower end of the connecting shaft, the upper end of the connecting shaft passes through the top of the buffer tank and is connected to the piston rod of the cylinder; the cavity at the lower end of the piston in the buffer tank is a feed chamber, one side of the feed chamber is connected to a mixer, and the other side is connected to a discharge pipe through a discharge valve; a scale sensor is provided on the outside of the buffer tank, a horizontal connecting rod is provided on the connecting shaft, and the measuring ruler on the scale sensor is connected to the connecting rod. The online monitoring cylinder for the metering pump serves as a secondary monitor after material proportioning, thereby further ensuring the accuracy of material discharge, ensuring the product quality of epoxy cast products, and saving testing costs. The method of secondary monitoring of materials using an online monitoring cylinder for a metering pump not only reduces monitoring costs but also ensures the quality of cast products.

Description

Technical Field

[0001] The invention relates to an online monitoring cylinder of a metering pump and a method for secondary monitoring of materials thereof, belonging to the technical field of vacuum casting material mixing metering. Background Art

[0002] Vacuum casting equipment is used to produce epoxy cast products. Precise casting material ratios are paramount for epoxy cast products. During the actual production process, this precision is generally achieved. However, over time, key components of the equipment are worn by the casting material. This wear is difficult to detect, significantly reducing the quality of the resulting cast products. This can lead to various product problems after long-term use.

[0003] To avoid deviations in the proportion of ingredients, samples are taken before pouring in the actual production process to test the accuracy of the metering pump. However, sampling must be done under normal pressure. Due to the complexity of the system, accurate sampling under normal pressure does not necessarily mean accurate sampling under vacuum. Therefore, the glass transition temperature of products or samples poured under vacuum must be tested. Testing the glass transition temperature is relatively complex and few companies can implement it. This means that the metering pump's delivery is accurate. If product quality problems occur, they may occur in large quantities. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an online monitoring cylinder for a metering pump, which serves as a secondary monitoring after material proportioning, thereby further ensuring the accuracy of material discharge, ensuring the product quality of epoxy casting products, and saving detection costs.

[0005] In order to solve the above problems, the specific technical solutions of the present invention are as follows: a metering pump online monitoring cylinder, comprising a buffer tank, a cylinder, a connecting shaft and a scale sensor; a piston is provided in the buffer tank, the top of the piston is connected to the lower end of the connecting shaft, and the upper end of the connecting shaft passes through the top of the buffer tank and is connected to the piston rod of the cylinder; the cavity at the lower end of the piston in the buffer tank is a feed cavity, one side of the feed cavity is connected to the mixer, and the other side is connected to the discharge pipe through the discharge valve; a scale sensor is provided on the outside of the buffer tank, a horizontal connecting rod is provided on the connecting shaft, and the measuring scale on the scale sensor is connected to the connecting rod.

[0006] The top of the mixer is provided with two plunger valves, the bottoms of the plunger valves are communicated with the inner cavity of the mixer, and the feed ports of the plunger valves are respectively located on both sides.

[0007] The method for secondary monitoring of materials using an online monitoring cylinder with a metering pump includes the following steps:

[0008] 1) Two weighed materials are injected into the mixer through the plunger valve respectively, and the materials are introduced into the feed chamber by extrusion;

[0009] 2) As the material in the feed chamber increases, the piston rises continuously, driving the connecting rod to move upward;

[0010] 3) The connecting rod drives the measuring scale to move upward. When the two mixed materials are fully input into the feeding chamber and the measuring scale is consistent with the set height, the scale sensor sends a signal to the outside to start the cylinder;

[0011] 4) Open the discharge valve, the cylinder pushes the piston downward, and the material is discharged from the discharge pipe of the discharge valve;

[0012] 5) When the input metering material is insufficient and the piston drives the measuring ruler to fail to reach the specified position of the scale sensor, the scale sensor will send out an alarm signal, and the metering equipment of the previous process needs to be repaired.

[0013] The metering pump online monitoring cylinder of the present application adopts an externally arranged scale sensor structure, which can perform secondary monitoring of the metered material to prevent inaccurate metering caused by wear of the metering pump. It not only has high monitoring efficiency, but also has a production cost and efficiency far lower than the online monitoring of material composition itself. Therefore, it is suitable for most equipment that uses a metering pump to meter mixed materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main view of the overall structure of the metering pump online monitoring cylinder.

[0015] Figure 2 This is a side view of the overall structure of the metering pump online monitoring cylinder.

[0016] Figure 3 for Figure 2 AA cross-sectional view. DETAILED DESCRIPTION

[0017] like Figures 1 to 3 As shown, a metering pump online monitoring cylinder includes a buffer tank 1, a cylinder 2, a connecting shaft 3 and a scale sensor 4; a piston 5 is provided in the buffer tank 1, the top of the piston 5 is connected to the lower end of the connecting shaft 3, and the upper end of the connecting shaft 3 passes through the top of the buffer tank 1 and is connected to the piston rod of the cylinder 2; the cavity in the buffer tank 1 located at the lower end of the piston 5 is a feed chamber 6, one side of the feed chamber 6 is connected to the mixer 7, and the other side is connected to the discharge pipe through the discharge valve 8; a scale sensor 4 is provided on the outside of the buffer tank 1, a horizontal connecting rod 9 is provided on the connecting shaft 3, and the measuring ruler 10 on the scale sensor 4 is connected to the connecting rod 9.

[0018] The mixer 7 is equipped with two plunger valves 11 at the top. The bottom of the plunger valves 11 communicates with the mixer 7's inner cavity, and the feed ports of the plunger valves 11 are located on either side. The two plunger valves are respectively loaded with two materials of different compositions, each of which is measured. Those skilled in the art can also increase the number of plunger valves 11 according to the type of material.

[0019] The method for secondary monitoring of materials using an online monitoring cylinder with a metering pump includes the following steps:

[0020] 1. Two weighed materials are injected into the mixer 7 through the plunger valve 11 respectively, and the materials are introduced into the feed chamber 6 by extrusion;

[0021] 2 When the material in the feed chamber 6 continues to increase, the piston 5 continues to rise, driving the connecting rod 9 to move upward;

[0022] 3 The connecting rod 9 drives the measuring ruler 10 to move upward. When the two mixed materials are fully input into the feeding chamber 6 and the measuring ruler 10 is consistent with the set height, the scale sensor 4 sends a signal to the outside to start the cylinder 2;

[0023] 4 Open the discharge valve 8, the cylinder 2 pushes the piston 5 downward, and the material is discharged from the discharge pipe;

[0024] When the input material is insufficient and the piston 5 drives the measuring ruler 10 to fail to reach the designated position of the scale sensor 4, the scale sensor 4 issues an alarm signal, and the metering equipment of the previous process needs to be repaired.

Claims

1. A method for secondary monitoring of materials by an online monitoring cylinder of a metering pump, characterized in that: The metering pump online monitoring cylinder comprises a buffer tank (1), a cylinder (2), a connecting shaft (3) and a scale sensor (4); a piston (5) is provided in the buffer tank (1), the top of the piston (5) is connected to the lower end of the connecting shaft (3), and the upper end of the connecting shaft (3) passes through the top of the buffer tank (1) and is connected to the piston rod of the cylinder (2); the cavity located at the lower end of the piston (5) in the buffer tank (1) is a feed cavity (6), one side of the feed cavity (6) is connected to the mixer (7), and the other side is connected to the discharge pipe through the discharge valve (8); a scale sensor (4) is provided on the outside of the buffer tank (1), a horizontal connecting rod (9) is provided on the connecting shaft (3), a measuring ruler (10) on the scale sensor (4) is connected to the connecting rod (9), and the scale sensor (4) performs secondary monitoring on the metered material through the moving distance of the measuring ruler (10); The above-mentioned method for secondary monitoring of materials by the online monitoring cylinder of the metering pump comprises the following steps: 1) Two weighed materials are injected into the mixer (7) through the plunger valve (11) respectively, and the materials are introduced into the feed chamber (6) by extrusion; 2) When the amount of material in the feed chamber (6) increases, the piston (5) rises continuously, driving the connecting rod (9) to move upward; 3) The connecting rod (9) drives the measuring ruler (10) to move upward. When the two mixed materials are fully fed into the feeding chamber (6) and the measuring ruler (10) is consistent with the set height, the scale sensor (4) sends a signal to the outside to start the cylinder (2); 4) Open the discharge valve (8), the cylinder (2) pushes the piston (5) downward, and discharges the material from the discharge pipe of the discharge valve (8); 5) When the input metering material is insufficient, the piston (5) drives the measuring ruler (10) to fail to reach the designated position of the scale sensor (4), and the scale sensor (4) sends an alarm signal, and the metering equipment of the previous process needs to be repaired.

2. The method for secondary monitoring of materials by an online monitoring cylinder of a metering pump according to claim 1, characterized in that: The mixer (7) has two plunger valves (11) on the top, the bottom of the plunger valve (11) is communicated with the inner cavity of the mixer (7), and the feed ports of the plunger valve (11) are respectively located on both sides.

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