Constant-pressure metering and weighing equipment

Abstract

The utility model relates to the technical field of metering and weighing equipment, and discloses constant-pressure metering and weighing equipment which comprises a supporting frame, a raw material barrel and a weighing barrel are arranged on the supporting frame from top to bottom, a material guide pipe is connected between the raw material barrel and the weighing barrel, and an electromagnetic valve is arranged on the material guide pipe. A weighing instrument is arranged between the supporting frame and the weighing cylinder, the weighing cylinder is in lap joint with the weighing instrument, a supporting column is arranged on one side of the supporting frame, an infusion pump is arranged at the top of the supporting column, the infusion pump is higher than the top of the weighing cylinder, and an infusion pipe is connected between the liquid inlet end of the bottom of the infusion pump and the weighing cylinder. The liquid pumping pipe penetrates through the top wall of the weighing cylinder and extends to the inner bottom of the weighing cylinder, the liquid inlet end of the top of the liquid pumping pump is communicated with a pulse damper, and the liquid outlet end of the pulse damper is connected with a liquid outlet pipe. According to the invention, the weighing accuracy of the weighing metering equipment is improved.

Description

A constant pressure weighing device Technical Field

[0001] This application relates to the field of weighing equipment technology, and in particular to a constant pressure weighing equipment. Background Technology

[0002] In today's industrial manufacturing sector, the handling of liquid materials is involved in numerous production processes. Whether it's the synthesis of chemical products, the processing of food and beverages, or the production of pharmaceuticals, the precise metering and flow control of liquid materials play a crucial role. Accurate metering ensures the stability of product quality, improves production efficiency, and effectively controls production costs.

[0003] Currently, conventional weighing and metering devices are widely used in industrial production. These devices typically have the pump body located at the bottom, connected to the liquid material via a hose for extraction. However, this structural design has many drawbacks.

[0004] From a mechanical structure perspective, the connection method between the pump body and the hose, as well as the weight and position of the pump body itself, have a significant impact on the overall weighing system. During actual operation, pump vibration and hose swaying in the liquid can cause additional external interference to the load cell, leading to inaccurate weighing results. In production scenarios where high measurement accuracy is required, this deviation can potentially cause product quality issues. Summary of the Invention

[0005] In order to improve the weighing accuracy of weighing equipment, this application provides a constant pressure weighing device.

[0006] The constant pressure weighing device provided in this application adopts the following technical solution:

[0007] A constant pressure weighing device includes a support frame, on which a raw material cylinder and a weighing cylinder are arranged from top to bottom. A guide pipe is connected between the raw material cylinder and the weighing cylinder, and a solenoid valve is installed on the guide pipe. A weighing instrument is installed between the support frame and the weighing cylinder, and the weighing cylinder is attached to the weighing instrument. A support column is provided on one side of the support frame, and a liquid pump is installed at the top of the support column. The height of the liquid pump is higher than the top of the weighing cylinder, and a liquid inlet end at the bottom of the liquid pump is connected to the weighing cylinder via a liquid suction pipe. The liquid suction pipe passes through the top wall of the weighing cylinder and extends to the bottom of the weighing cylinder. A pulse damper is connected to the liquid inlet end at the top of the liquid pump, and an outlet pipe is connected to the outlet end of the pulse damper.

[0008] By adopting the above technical solution, the pump is positioned above and outside the weighing cylinder, significantly reducing the impact of the pump's own weight and the vibrations it generates during operation on weighing accuracy, thereby improving the stability and accuracy of the weighing process. Simultaneously, the application of a pulse damper further reduces the impact of pressure fluctuations during fluid transport, improving the smoothness of liquid material transfer and thus enhancing the reliability of high-precision metering.

[0009] Optionally, the weighing cylinder has a through hole for the liquid extraction pipe to pass through, and a rubber ring is fitted on the through hole, with the liquid extraction pipe and the rubber ring in contact.

[0010] By adopting the above technical solution, a rubber ring is added to the connection between the liquid extraction pipe and the weighing cylinder, utilizing the elastic properties of the rubber ring to achieve sealing and shock absorption functions. This design effectively reduces the risk of pipe loosening and leakage caused by liquid flow or external vibration during the liquid extraction process, while also reducing the possibility of vibration being transmitted to the weighing instrument, thereby improving the stability and measurement accuracy of the weighing system.

[0011] Optionally, the weighing instruments are mounted on a support frame, and multiple weighing cylinders are distributed around the outer periphery of the weighing cylinder. The weighing cylinders are provided with overlapping plates on the side wall near the weighing instruments, and the weighing cylinders are supported on multiple weighing instruments through the overlapping plates.

[0012] By adopting the above technical solution, the weighing instrument is installed on the support frame, and by setting overlapping plates on the side wall of the weighing cylinder, the weighing cylinder can be evenly supported on multiple weighing instruments. This not only improves the measurement accuracy of the weighing system, but also enhances the structural stability of the entire equipment and effectively reduces the impact of external vibrations on the weighing results.

[0013] Optionally, a reinforcing rib is connected between the top of the overlapping plate and the side wall of the weighing cylinder.

[0014] By adopting the above technical solution, adding reinforcing ribs between the top of the overlapping plate and the side wall of the weighing cylinder can significantly improve the structural stability between the two, reduce the risk of deformation caused by external vibration or uneven load, and help to further reduce the impact of external factors on the accuracy of weighing results.

[0015] Optionally, the bottom of the support frame is provided with an adjustable base, which includes a base plate, a support plate located above the base plate, and a plurality of electric telescopic rods disposed between the base plate and the support plate. The plurality of electric telescopic rods are evenly distributed along the perimeter of the support plate, and the cylinder of each electric telescopic rod is fixed on the base plate. A universal adapter is connected between the top end of the telescopic rod and the bottom wall of the support plate.

[0016] By adopting the above technical solutions, the design of the adjustable base allows the entire equipment to be adjusted according to the unevenness of the ground. The even distribution of the electric telescopic rods enhances the balance performance of the support frame, avoiding tilting caused by uneven force at a single point. Furthermore, the use of universal joints in conjunction with the movement of the electric telescopic rods allows the support plate to maintain flexible posture changes during adjustment, thereby achieving precise level adjustment of the equipment and improving the measurement accuracy of the constant pressure weighing equipment.

[0017] Optionally, the support plate is equipped with a controller and an electronic level electrically connected to the controller. The electronic level is located at the top of the support plate, and several electric telescopic rods are electrically connected to the controller.

[0018] By adopting the above technical solution, even if the ground is uneven during actual use, the electronic level can detect the posture of the support plate in real time and feed the data back to the controller. The controller can then precisely adjust the extension or retraction of each electric telescopic rod based on the posture information, thereby ensuring that the support frame always remains horizontal and realizing the automatic leveling function of the support frame.

[0019] Optionally, a number of omnidirectional positioning wheels are distributed and installed on the bottom of the base plate.

[0020] By adopting the above technical solution, the installation of several omnidirectional positioning wheels enhances the mobility of the entire constant pressure weighing equipment. Users can easily move and adjust the equipment's position at different work locations, and after the position adjustment is completed, the positioning function ensures the equipment is stably placed, thus adapting to various usage environment requirements without affecting measurement accuracy.

[0021] Optionally, the top of the raw material cylinder is provided with a cylinder cover, and a stirring assembly is provided inside the raw material cylinder. The stirring assembly includes a stirring rod rotatably connected to the cylinder cover, a plurality of stirring blades connected to the stirring rod, and a motor that drives the stirring rod to rotate. The motor is located on the top of the cylinder cover, and its output shaft rotatably passes through the cylinder cover and is coaxially connected to the stirring rod.

[0022] By adopting the above technical solution, the stirring component inside the raw material cylinder can achieve thorough mixing of liquid materials, ensuring the uniformity of materials during storage or transportation. The motor-driven stirring rod and its blades can effectively prevent stratification of liquid materials caused by static placement, thus ensuring accurate subsequent metering.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By placing the pump on the outside and above the weighing cylinder, the impact of the pump's own weight and the vibrations it generates during operation on weighing accuracy is significantly reduced, thereby improving the stability and accuracy of the weighing process. Simultaneously, the application of a pulse damper further reduces the impact of pressure fluctuations during fluid transport, improving the smoothness of liquid material transfer and thus enhancing the reliability of high-precision metering.

[0025] 2. A rubber ring is added to the connection between the liquid extraction pipe and the weighing cylinder, utilizing the elastic properties of the rubber ring to achieve sealing and shock absorption. This design effectively reduces the risk of pipe loosening and leakage caused by liquid flow or external vibration during the liquid extraction process, while also reducing the possibility of vibration being transmitted to the weighing instrument, thereby improving the stability and measurement accuracy of the weighing system;

[0026] 3. By installing the weighing instruments on the support frame and setting overlapping plates on the side walls of the weighing cylinder, the weighing cylinder can be evenly supported on multiple weighing instruments. This not only improves the measurement accuracy of the weighing system but also enhances the structural stability of the entire equipment and effectively reduces the impact of external vibrations on the weighing results. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 is a cross-sectional view showing the internal structure of the raw material cylinder and the weighing cylinder in the embodiments of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Support frame; 2. Raw material cylinder; 21. Feed pipe; 211. Solenoid valve; 22. Support base; 23. Cylinder cover; 3. Weighing cylinder; 31. Through hole; 311. Rubber ring; 32. Overlap plate; 321. Reinforcing rib; 4. Mixing assembly; 41. Mixing rod; 42. Mixing blade; 43. Motor; 5. Weighing instrument; 6. Adjustable base; 61. Base plate; 62. Support plate; 621. Electronic level; 622. Controller; 63. Electric telescopic rod; 631. Universal adapter; 7. Universal positioning wheel; 8. Support column; 81. Liquid pump; 811. Liquid extraction pipe; 9. Pulse damper; 91. Liquid outlet pipe; 911. Atomizing nozzle. Detailed Implementation

[0031] The present application will be further described in detail below with reference to Figures 1-2.

[0032] This application discloses a constant pressure weighing device.

[0033] Referring to Figures 1 and 2, a constant pressure weighing device includes a support frame 1. A raw material cylinder 2 and a weighing cylinder 3 are mounted on the support frame 1 from top to bottom. A stirring assembly 4 is installed inside the raw material cylinder 2. A guide pipe 21 connects the raw material cylinder 2 and the weighing cylinder 3, and a solenoid valve 211 is installed on the guide pipe 21. A weighing instrument 5 is fixedly mounted on the inner wall of the support frame 1 facing the weighing cylinder 3, and the weighing cylinder 3 rests on the weighing instrument 5. An adjusting base 6 is fixedly mounted at the bottom of the support frame 1, and several universal positioning wheels 7 are distributed and installed at the bottom of the adjusting base 6. A support column 8 is fixedly installed on one side of the support frame 1 on the adjusting base 6. A liquid pump 81 is installed on the top of the support column 8. The height of the liquid pump 81 is higher than the top of the weighing cylinder 3, and a liquid pump pipe 811 is connected between the liquid inlet end of the liquid pump 81 and the weighing cylinder 3. A through hole 31 is opened on the top of the weighing cylinder 3 for the liquid pump pipe 811 to pass through. A rubber ring 311 is fitted on the through hole 31. The liquid pump pipe 811 passes through the inner ring of the rubber ring 311 into the weighing cylinder 3 and extends to the bottom of the weighing cylinder 3. A pulse damper 9 is fixedly installed at the liquid inlet end of the top of the liquid pump 81, and an outlet pipe 91 is connected to the outlet end of the pulse damper 9.

[0034] Referring to Figures 1 and 2, when liquid material needs to be input during processing, the support frame 1 is moved to the vicinity of the processing equipment using the universal positioning wheels 7. Then, the support frame 1 is adjusted to a horizontal state according to the flatness of the ground using the adjusting base 6. The liquid material is pre-stored in the raw material cylinder 2 and continuously stirred by the stirring component 4 to maintain a uniformly mixed state. The liquid material is weighed according to the required mass of liquid material for the processing equipment. The solenoid valve 211 is opened, and the raw material cylinder 2 enters the weighing cylinder 3 through the guide pipe 21. The weighing instrument 5 monitors the weight of the weighing cylinder 3 in real time until the weight reaches the preset value, at which point the solenoid valve 211 closes. Then, the liquid pump 81 is started, and the weighed liquid material in the weighing cylinder 3 is drawn through the liquid extraction pipe 811 to the pulse damper 9, and then output from the liquid outlet pipe 91 to the feeding point of the processing equipment.

[0035] Referring to Figure 1, a support seat 22 is provided on the side wall of the raw material cylinder 2 along its own circumferential fixing ring, and the raw material cylinder 2 is connected to the top of the support frame 1 through the support seat 22.

[0036] Referring to Figure 2, a cylinder cover 23 is installed on the top of the raw material cylinder 2. The stirring assembly 4 includes a stirring rod 41, stirring blades 42, and a motor 43. The stirring rod 41 is perpendicular to the bottom surface of the cylinder cover 23 and rotatably connected to the cylinder cover 23. The motor 43 is fixedly mounted on the top of the cylinder cover 23, and its output shaft rotatably passes through the cylinder cover 23 and is coaxially fixedly connected to the stirring rod 41. Several stirring blades 42 are distributed along the length and circumference of the stirring rod 41 and are fixedly mounted on the stirring rod 41 perpendicular to its axial direction.

[0037] Referring to Figure 1, multiple weighing instruments 5 are distributed around the outer periphery of the weighing cylinder 3. In this embodiment, three are evenly distributed on each side. A horizontally fixed overlapping plate 32 is provided on the side wall of the weighing cylinder 3 near each weighing instrument 5. A reinforcing rib 321 is fixedly provided between the top of each overlapping plate 32 and the side wall of the weighing cylinder 3. The weighing cylinder 3 is collectively supported on the twelve weighing instruments 5 via the overlapping plates 32.

[0038] Referring to Figure 1, the adjusting base 6 includes a base plate 61, a support plate 62, and electric telescopic rods 63. The support plate 62 is located above the base plate 61 and the two are arranged parallel to each other. Several electric telescopic rods 63 are vertically arranged between the base plate 61 and the support plate 62. In this embodiment, four are used as an example, distributed at the four corners where the base plate 61 and the support plate 62 meet. The cylinder of each electric telescopic rod 63 is fixed to the base plate 61, and a universal adapter 631 is fixed between the top of the telescopic rod and the bottom wall of the support plate 62. An electronic level 621 is installed on the top of the support plate 62, and a controller 622 is fixedly installed on the side wall. The electronic level 621 and the controller 622 are connected by wires. Each electric telescopic rod 63 is electrically connected to the controller 622.

[0039] Referring to Figure 1, in order to improve the uniformity of material output from the liquid outlet pipe 91, an atomizing nozzle 911 is installed at the end of the liquid outlet pipe 91.

[0040] The implementation principle of a constant pressure weighing device in this application embodiment is as follows: when liquid materials need to be input during the processing, the support frame 1 is moved to the vicinity of the processing equipment by means of the universal positioning wheel 7, and then the support frame 1 is adjusted to a horizontal state by means of the coordinated action of the controller 622, the electronic level 621 and the electric telescopic rod 63.

[0041] The liquid material is pre-stored in the raw material cylinder 2, and under the control of the motor 43, the stirring blade 42 continuously stirs the liquid material in the raw material cylinder 2 to keep the liquid material in a uniformly mixed state. The liquid material is weighed according to the required mass of the processing equipment. The solenoid valve 211 is opened, and the raw material cylinder 2 enters the weighing cylinder 3 through the guide pipe 21. The weighing instrument 5 monitors the weight of the weighing cylinder 3 in real time until the weight reaches the preset value, at which point the solenoid valve 211 closes. Then, the liquid pump 81 is started, and the weighed liquid material in the weighing cylinder 3 is drawn through the liquid extraction pipe 811 to the pulse damper 9, and then evenly sprayed from the atomizing nozzle 911 at the end of the outlet pipe 91 to the feeding point of the processing equipment.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A constant pressure metering weighing apparatus, characterized by The system includes a support frame (1), on which a raw material cylinder (2) and a weighing cylinder (3) are arranged from top to bottom. A guide pipe (21) connects the raw material cylinder (2) and the weighing cylinder (3). A solenoid valve (211) is installed on the guide pipe (21). A weighing instrument (5) is installed between the support frame (1) and the weighing cylinder (3). The weighing cylinder (3) is attached to the weighing instrument (5). A support column (8) is provided on one side of the support frame (1). A liquid pump (81) is provided at the top of the column (8). The height of the liquid pump (81) is higher than the top of the weighing cylinder (3). A liquid inlet end at the bottom of the liquid pump (81) is connected to the weighing cylinder (3) via a liquid suction pipe (811). The liquid suction pipe (811) passes through the top wall of the weighing cylinder (3) and extends to the bottom of the weighing cylinder (3). A pulse damper (9) is connected to the liquid inlet end at the top of the liquid pump (81). A liquid outlet pipe (91) is connected to the liquid outlet end of the pulse damper (9).

2. The constant pressure weighing device according to claim 1, characterized in that... The weighing cylinder (3) has a through hole (31) for the liquid extraction pipe (811) to pass through, and a rubber ring (311) is fitted on the through hole (31). The liquid extraction pipe (811) and the rubber ring (311) are arranged in contact.

3. The constant pressure weighing device according to claim 1, characterized in that... The weighing instruments (5) are installed on the support frame (1), and multiple weighing cylinders (3) are distributed around the outer periphery of the weighing cylinder (3). The weighing cylinder (3) is provided with an overlapping plate (32) on the side wall near the weighing instrument (5). The weighing cylinder (3) is supported on multiple weighing instruments (5) through the overlapping plate (32).

4. A constant pressure metering weighing apparatus according to claim 3 wherein The top of the overlapping plate (32) is connected to the side wall of the weighing cylinder (3) by a reinforcing rib (321).

5. A constant pressure weighing device according to claim 1, characterized in that... The bottom of the support frame (1) is provided with an adjustment base (6). The adjustment base (6) includes a base plate (61), a support plate (62) located above the base plate (61), and a plurality of electric telescopic rods (63) arranged between the base plate (61) and the support plate (62). The plurality of electric telescopic rods (63) are evenly distributed around the perimeter of the support plate (62). The cylinder of each electric telescopic rod (63) is fixed on the base plate (61), and a universal adapter (631) is connected between the top of its telescopic rod and the bottom wall of the support plate (62).

6. A constant pressure metering weighing apparatus according to claim 5 wherein The support plate (62) is equipped with a controller (622) and an electronic level (621) electrically connected to the controller (622). The electronic level (621) is located on the top of the support plate (62), and several electric telescopic rods (63) are electrically connected to the controller (622).

7. A constant pressure metering weighing apparatus according to claim 5 wherein Several omnidirectional positioning wheels (7) are distributed and installed on the bottom of the base plate (61).

8. A constant pressure metering weighing apparatus according to claim 1 wherein The top of the raw material cylinder (2) is provided with a cylinder cover (23), and a stirring assembly (4) is provided inside the raw material cylinder (2). The stirring assembly (4) includes a stirring rod (41) rotatably connected to the cylinder cover (23), a plurality of stirring blades (42) connected to the stirring rod (41), and a motor (43) that drives the stirring rod (41) to rotate. The motor (43) is located on the top of the cylinder cover (23), and its output shaft rotatably passes through the cylinder cover (23) and is coaxially connected with the stirring rod (41).

Images