Automatic grain pressing device

Abstract

The utility model provides an automatic grain pressing device which can achieve automatic pressing of small energetic grains, improve the pressing efficiency and reduce the labor intensity of workers. The automatic grain pressing device comprises a supporting unit, a hydraulic pump station, a hydraulic cylinder, a pressure sensor and a mold, wherein the hydraulic pump station, the hydraulic cylinder, the pressure sensor and the mold are arranged on the supporting unit; the hydraulic pump station is connected with the hydraulic cylinder and used for providing hydraulic oil for the hydraulic cylinder. A piston of the hydraulic cylinder is vertically opposite to the pressure sensor; the mold is arranged at the piston end of the hydraulic cylinder and is used for filling medicament powder to be pressed; the pressure sensor is used for detecting the pressure borne by the medicine column in the pressing process.

Description

Technical Field

[0001] The utility model relates to a charge pressing device, in particular to an automatic charge pressing device, and belongs to the technical field of pyrotechnic preparation. Background Art

[0002] At present, the conventional automatic pressing technology of energetic charge is mostly applied to large-sized charge. For the precision pressing demand of small energetic charge with a mass of less than 1g, manual operation is mostly used because the pressing process requires a small load and high control accuracy, which is inefficient. Utility Model Content

[0003] In view of this, the utility model provides an automatic drug column pressing device, which can realize the automatic pressing of small energetic drug columns, improve the pressing efficiency, and reduce the workload of personnel.

[0004] The technical solution of the utility model is: an automatic drug column pressing device, comprising: a support unit and a hydraulic pump station, a hydraulic cylinder, a pressure sensor and a mold arranged on the support unit;

[0005] The hydraulic pump station is connected to the hydraulic cylinder and is used to provide hydraulic oil to the hydraulic cylinder;

[0006] The piston of the hydraulic cylinder is vertically opposite to the pressure sensor;

[0007] The mold is arranged at the piston end of the hydraulic cylinder, and the mold is used to fill the medicine powder to be pressed;

[0008] The pressure sensor is used to detect the pressure exerted on the medicine column during the compression process.

[0009] As a preferred embodiment of the utility model: the hydraulic pump station comprises: a hydraulic pump, a valve group and an oil tank;

[0010] The oil inlet of the hydraulic pump is connected to the oil tank, and the oil outlet is connected to the hydraulic cylinder through a pipeline provided with a valve group; the valve group includes: a reversing valve and an electro-hydraulic proportional relief valve, and the reversing valve is used for switching between pressure loading and unloading;

[0011] The pipeline connected to the oil outlet of the hydraulic pump is divided into two branches, one branch is connected to the hydraulic cylinder and the oil tank through the reversing valve; the other branch is connected to the oil tank through a pipeline provided with an electro-hydraulic proportional overflow valve.

[0012] As a preferred embodiment of the present invention: it also includes a control unit, and the control unit is electrically connected to the pressure sensor and the electro-hydraulic proportional relief valve respectively.

[0013] As a preferred embodiment of the present invention: a filter is arranged on the oil return pipeline of the hydraulic pump station.

[0014] As a preferred embodiment of the present invention: the support unit includes a base and a stand;

[0015] The hydraulic pump station is installed inside the base;

[0016] The stand is arranged on the upper end surface of the base;

[0017] The hydraulic cylinder is vertically mounted on the lower end surface of the inner frame of the platform, and its piston is vertically upward;

[0018] The pressure sensor is installed on the upper end surface of the inner frame of the test stand, vertically opposite to the hydraulic cylinder.

[0019] As a preferred embodiment of the present invention: the hydraulic cylinder is a double-acting cylinder.

[0020] As a preferred embodiment of the present invention, it also includes a display screen for real-time recording and displaying the pressure value detected by the pressure sensor.

[0021] Beneficial effects:

[0022] (1) The automatic explosive column pressing device of the utility model can realize the automatic pressing of small energetic explosive columns through the pressure provided by the hydraulic pump station and the hydraulic cylinder, thereby improving the pressing efficiency and reducing the workload of personnel.

[0023] (2) In the utility model, an electro-hydraulic proportional relief valve is provided in the valve group of the hydraulic pump station. By adjusting the electro-hydraulic proportional relief valve, the flow rate of the oil entering the hydraulic cylinder can be adjusted, thereby adjusting the pressure output by the hydraulic cylinder, thereby achieving precise control of the pressure during the pressing process.

[0024] (3) In the present invention, the hydraulic cylinder adopts a double-acting cylinder body, which can ensure the stability and reliability of the pressure loading process.

[0025] (4) In the utility model, the hydraulic pump station is equipped with a filter, which can filter and clean the circuit oil and reduce the flow channel blockage problem of precision hydraulic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the automatic drug column pressing device of the utility model;

[0027] Figure 2 This is a schematic diagram of the installation of the hydraulic cylinder, pressure sensor and mold;

[0028] Figure 3 Schematic diagram of the connection relationship between the valve group of the hydraulic pump and the hydraulic cylinder.

[0029] Among them: 1-stand, 2-pressure sensor, 3-mold, 4-hydraulic cylinder, 5-table, 6-base, 7-hydraulic pump, 8-valve group, 81-reversing valve, 82-electro-hydraulic proportional relief valve, 9-oil tank, 10-filter. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] This embodiment provides an automatic drug column pressing device for realizing automatic pressing of small energetic drug columns (with a mass less than 1 g).

[0032] like Figure 1 and Figure 2 As shown, the automatic drug column pressing device includes: a support unit, a hydraulic pump station, a hydraulic cylinder 4, a pressure sensor 2 and a mold 3;

[0033] The support unit includes a base 6 and a stand 1. The hydraulic pump station is installed inside the base 6, and the hydraulic pump station is used to provide a power source. The hydraulic pump station is equipped with a filter 10 to filter and clean the circuit oil and reduce the flow channel blockage problem of precision hydraulic components.

[0034] The upper end surface of the base 6 is used as a table 5 to support the stand 1; as an example, the stand 1 is a rectangular frame structure.

[0035] The hydraulic cylinder 4 is vertically mounted on the lower end surface of the inner frame of the stand 1, and its piston is vertically upward; the hydraulic cylinder 4 is connected to the hydraulic pump station through an oil pipe, and the hydraulic pump station is used to provide hydraulic oil to the hydraulic cylinder 4, thereby controlling the extension and contraction of the piston of the hydraulic cylinder 4. After the pharmaceutical powder to be pressed is loaded into the internal cavity of the mold 3, the mold 3 is fixedly placed above the piston of the hydraulic cylinder 4 (that is, the mold 3 is fixed to the end of the piston of the hydraulic cylinder 4). The hydraulic cylinder 4 is used to output a stable load to the mold 3; the mold 3, as a load transmission component, can ensure that the pressure loaded on the surface of the medicine column is uniform, thereby ensuring the quality of the medicine column.

[0036] As an example, the hydraulic cylinder 4 adopts a double-acting cylinder to ensure the stability and reliability of the pressure loading process; in this example, the maximum load output by the hydraulic cylinder 4 is 10KN.

[0037] The pressure sensor 2 is installed on the upper end surface of the inner frame of the stand 1, vertically opposite to the hydraulic cylinder 4; after the pressing device applies a load (there is a pressure rod on the top of the mold 3, and after the mold 3 is pushed upward by the hydraulic cylinder 4, the pressure rod on the top of the mold 3 contacts the pressure sensor 2, and the hydraulic cylinder 4 continues to extend upward, and the medicinal powder in the mold 3 can be pressed by the pressure rod), the pressure sensor 2 can collect the pressure on the medicinal column in the mold 3 in real time.

[0038] The hydraulic pump station can adjust the pressure output by the hydraulic cylinder 4 (i.e., adjust the amount of hydraulic oil output to the hydraulic cylinder 4) according to the pressure detected by the pressure sensor 2, so that the pressure output by the hydraulic cylinder 4 meets the requirements for pressing small-sized medicine columns; thereby, the pressure on the medicine column during the load application process is monitored in real time through the pressure sensor 2 to ensure that the pressure is loaded in place.

[0039] The working process of the automatic drug column pressing device is as follows: the hydraulic pump station controls the extension of the piston rod of the hydraulic cylinder 4, so that the mold 3 is squeezed by the pressure sensor 2 and the piston rod of the hydraulic cylinder 4, and the powder medicine filled in the mold 3 is gradually compressed into a solid block under the pressure. During the pressure loading process, according to the pressure value measured in real time by the pressure sensor 2, the amount of hydraulic oil output to the hydraulic cylinder 4 is adjusted so that the pressure output by the hydraulic cylinder 4 meets the requirements for pressing small drug columns (adjusting the amount of hydraulic oil output to the hydraulic cylinder 4 so that the pressure output by the hydraulic cylinder 4 meets the requirements is a prior art).

[0040] After a single pressing and loading is completed, the loading direction of the hydraulic oil is changed to realize the retraction of the piston rod of the hydraulic cylinder 4, so that the pressure on the mold 3 is gradually unloaded. Then the mold 3 is opened and the pressed medicine column inside is taken out. The device completes the automatic pressing process of the medicine column.

[0041] As an example, Figure 3 As shown, the hydraulic pump station includes a hydraulic pump 7, a valve group 8 and an oil tank 9, wherein the oil inlet of the hydraulic pump 7 is connected to the oil tank 9, and the oil outlet is connected to the hydraulic cylinder 4 through a pipeline provided with the valve group 8; the valve group 8 includes: a reversing valve 81 and an electro-hydraulic proportional relief valve 82, wherein the reversing valve 81 has a speed regulating function, that is, the oil flow rate in the reversing valve 81 is adjustable; thereby, the pressure loading and unloading process is controlled by the reversing function of the reversing valve 81, and the pressure loading speed of the hydraulic cylinder 4 is regulated by the speed regulating function of the reversing valve 81.

[0042] The reversing valve 81 is a three-position four-way valve, the P port of which is connected to the hydraulic pump 7, the T port is connected to the oil tank 9 through the oil return pipeline provided with a filter 10, and the A port and the B port are respectively connected to the two chambers of the hydraulic cylinder 4; thus, the switching of pressure loading and unloading can be realized through the reversing valve 81; Figure 3 As shown, when the reversing valve 81 is located in the right working position, it is used to control the extension of the piston rod of the hydraulic cylinder 4 to achieve pressure loading; when the reversing valve 81 is located in the left working position, it is used to control the retraction of the piston rod of the hydraulic cylinder 4 to achieve unloading.

[0043] In order to adjust the output pressure of the hydraulic cylinder 4, a pipeline with an electro-hydraulic proportional relief valve 82 is arranged in parallel, specifically: the pipeline connected to the oil outlet of the hydraulic pump 7 is divided into two branches, one branch is connected to the hydraulic cylinder 4 and the oil tank 9 through the reversing valve 81; the other branch is connected to the oil return pipeline through the pipeline with the electro-hydraulic proportional relief valve 82. By adjusting the electro-hydraulic proportional relief valve 82, the flow of oil entering the branch where the reversing valve 81 is located is adjusted, thereby adjusting the pressure of the hydraulic cylinder 4 output.

[0044] As an example, in order to achieve precise control, the electro-hydraulic proportional overflow valve 82 is adjusted by a control unit (specifically a PLC controller) (controlling the electro-hydraulic proportional overflow valve 82 by a PLC controller is a prior art), specifically: the PLC controller is electrically connected to the pressure sensor 2 and the electro-hydraulic proportional overflow valve 82, respectively. During the pressing process, the PLC controller collects the pressure measured by the pressure sensor 2 in real time, and compares it with the preset value, and then feeds back the pressure difference to the electro-hydraulic proportional overflow valve 82 through an analog quantity, and finally adjusts the proportional overflow valve 82 to adjust the output pressure of the hydraulic cylinder 4.

[0045] As an example, the device further includes a display screen for recording and displaying in real time the pressure value output by the device during the pressing process (ie, the pressure value detected by the pressure sensor 2).

[0046] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A drug column automatic pressing device, characterized in that: include: A support unit and a hydraulic pump station, a hydraulic cylinder (4), a pressure sensor (2) and a mold (3) arranged on the support unit; The hydraulic pump station is connected to the hydraulic cylinder (4) and is used to provide hydraulic oil to the hydraulic cylinder (4); The piston of the hydraulic cylinder (4) is vertically opposite to the pressure sensor (2); The mold (3) is arranged at the piston end of the hydraulic cylinder (4), and the mold (3) is used to fill the pharmaceutical powder to be compressed; The pressure sensor (2) is used to detect the pressure exerted on the medicine column during the pressing process.

2. The automatic drug column pressing device according to claim 1, characterized in that: The hydraulic pump station comprises: a hydraulic pump (7), a valve group (8) and an oil tank (9); The oil inlet of the hydraulic pump (7) is connected to the oil tank (9), and the oil outlet is connected to the hydraulic cylinder (4) via a pipeline provided with a valve group (8); the valve group (8) comprises: a reversing valve (81) and an electro-hydraulic proportional relief valve (82); the reversing valve (81) is used for switching between pressure loading and unloading; The pipeline connected to the oil outlet of the hydraulic pump (7) is divided into two branches, one branch is connected to the hydraulic cylinder (4) and the oil tank (9) through the reversing valve (81); the other branch is connected to the oil tank (9) through a pipeline provided with an electro-hydraulic proportional overflow valve (82).

3. The automatic drug column pressing device according to claim 2, characterized in that: It also comprises a control unit, which is electrically connected to the pressure sensor (2) and the electro-hydraulic proportional overflow valve (82) respectively.

4. The automatic drug column pressing device according to any one of claims 1 to 3, characterized in that: A filter (10) is provided on the oil return pipeline of the hydraulic pump station.

5. The automatic drug column pressing device according to any one of claims 1 to 3, characterized in that: The support unit comprises a base (6) and a stand (1); The hydraulic pump station is installed inside the base (6); The stand (1) is arranged on the upper end surface of the base (6); The hydraulic cylinder (4) is vertically mounted on the lower end surface of the inner frame of the platform (1), with its piston pointing vertically upward; The pressure sensor (2) is mounted on the upper end surface of the inner frame of the platform (1), vertically opposite to the hydraulic cylinder (4).

6. The automatic drug column pressing device according to any one of claims 1 to 3, characterized in that: The hydraulic cylinder (4) is a double-acting cylinder.

7. The automatic drug column pressing device according to any one of claims 1 to 3, characterized in that: It also comprises a display screen for recording and displaying the pressure value detected by the pressure sensor (2) in real time.

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