Automatic oil filling equipment of pressure transmitter

Abstract

The utility model discloses an automatic oil filling device of a pressure transmitter. The automatic oil filling device comprises a rack, a silicone oil purification system and a silicone oil filling system, wherein the silicone oil purification system and the silicone oil filling system are arranged on the rack; the silicone oil purification system comprises a primary pumping mechanical pump, a first pre-pumping mechanical pump, a diffusion pump, a cold trap, a purification tank, a weighing module and an oil storage tank, the primary pumping mechanical pump is connected with the purification tank through a first vacuum pipeline, the purification tank is sequentially connected with the cold trap, the diffusion pump and the first pre-pumping mechanical pump through a second vacuum pipeline, and the purification tank is connected with the oil storage tank through an oil inlet pipeline. The purification tank is arranged on the weighing module; the silicone oil filling system comprises a second pre-pumping mechanical pump, a molecular pump and an oil filling chamber, the primary pumping mechanical pump is connected with the oil filling chamber through a third vacuum pipeline, and the oil filling chamber is sequentially connected with the molecular pump and the second pre-pumping mechanical pump through a fourth pipeline. According to the utility model, the problems of low silicone oil purification purity, low oiling vacuum degree and low automation degree in an oil filling process are solved; the device has the characteristics of high automation degree, simple operation and high production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of high vacuum, in particular to an automatic oil filling device for a pressure transmitter. Background Art

[0002] A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. It can convert physical pressure parameters such as gas and liquid sensed by a pressure measuring element sensor into a standard electric signal (such as 4-20 mADC, etc.) to supply secondary instruments such as indicating alarm instruments, recorders, and regulators for measurement, indication, and process adjustment. During the production and manufacturing process of a pressure transmitter, it is necessary to fill silicone oil into the pressure transmitter body and its attached capillary tube. The existing process uses low-vacuum purified silicone oil for filling, with a relatively low vacuum degree during filling, fewer products produced at one time, a high manual participation rate, and a low degree of automation. Therefore, there is a need for a device that uses high-vacuum purified silicone oil and fills the silicone oil in a high-vacuum environment, with a relatively high degree of automation, reduces personnel participation in the production process, and uses automatic control of the device to improve reliability. Summary of the Utility Model

[0003] In view of the deficiencies in the above problems, the utility model provides an automatic oil filling device for a pressure transmitter.

[0004] To achieve the above object, the utility model provides an automatic oil filling device for a pressure transmitter, including a frame and a silicone oil purification system and a silicone oil filling system arranged on the frame;

[0005] The silicone oil purification system includes a roughing mechanical pump, a first pre-pumping mechanical pump, a diffusion pump, a cold trap, a purification tank, a weighing module, and an oil storage tank. The roughing mechanical pump is connected to the purification tank through a first vacuum pipeline. The purification tank is sequentially connected to the cold trap, the diffusion pump, and the first pre-pumping mechanical pump through a second vacuum pipeline. The purification tank is connected to the oil storage tank through an oil inlet pipeline. The purification tank is arranged on the weighing module. The silicone oil filling system includes a second pre-pumping mechanical pump, a molecular pump, and an oil filling chamber. The roughing mechanical pump is connected to the oil filling chamber through a third vacuum pipeline. The oil filling chamber is sequentially connected to the molecular pump and the second pre-pumping mechanical pump through a fourth pipeline.

[0006] Preferably, the frame includes a main frame and an operating table, and the two operating tables are symmetrically arranged on both sides of the main frame.

[0007] Preferably, there are two oil filling chambers, which are symmetrically arranged on the main frame, and each oil filling chamber is correspondingly connected to a purification tank.

[0008] Preferably, detectors for monitoring the vacuum degree are arranged in both the purification tank and the oil filling chamber.

[0009] Preferably, a magnetic stir bar is provided inside the purification tank.

[0010] Preferably, a heating jacket is provided outside the purification tank.

[0011] Preferably, an electrical control system is further included. The electrical control system includes a control panel provided on the main frame. The control panel is provided with a start button, a stop button, a molecular pump controller, a touch screen, an emergency stop button, a network cable interface, a high vacuum display screen for the purification chamber, a high vacuum display screen for the oil filling chamber, a low vacuum display screen for the purification chamber, and a low vacuum display screen for the oil filling chamber.

[0012] Preferably, an air source power display screen is further provided on the control panel.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model solves the problems of low purification purity of silicone oil, low oil injection vacuum degree, and low automation degree in the existing oil filling process of pressure transmitters. It has the characteristics of high automation degree, simple operation, and high production efficiency. Description of the Drawings

[0015] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the main frame of the present utility model;

[0017] Figure 3 is a schematic diagram of the silicone oil purification system of the present utility model;

[0018] Figure 4 is a schematic diagram of the silicone oil filling system of the present utility model;

[0019] Figure 5 is a schematic diagram of the electrical control system of the present utility model. Detailed Embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] The following will further describe the present utility model in detail with reference to the attached Figures 1-5 drawings:

[0024] Referring to Figure 1 FIG., the present utility model provides an automatic oil filling device for a pressure transmitter, which is used to automatically purify and refine silicone oil and automatically fill the pressure transmitter under high vacuum conditions; the process parameters can be set on the operation interface, and the process and process parameters can be displayed in real time. It includes a frame 1, a silicone oil purification system 2, a silicone oil filling system 3 and an electrical control system 4 provided on the frame; the silicone oil purification system 2 is integrated in the frame 1 and is used to automatically purify and refine silicone oil under high vacuum conditions, and the silicone oil filling system 3 is integrated in the frame 1 and is used to automatically fill the pressure transmitter under high vacuum conditions. The electrical control system 4 is integrated in the frame 1 for setting process parameters on the operation interface and displaying the process and process parameters in real time.

[0025] Referring to Figure 2 FIG., the frame 1 includes a main frame 1.1 and an operation table 1.2, and the two operation tables 1.2 are symmetrically arranged on both sides of the main frame 1.1. An electric control cabinet is integrated in the operation table 1.2 and is arranged on both sides of the main frame.

[0026] In this embodiment, the working mode of the frame is as follows: it is used to carry hardware and products such as a silicone oil purification system, a silicone oil filling system, and an electrical control system.

[0027] Referring to Figure 3, the silicone oil purification system 2 includes a primary pumping mechanical pump 2.1, a first pre-pumping mechanical pump 2.2, a diffusion pump 2.3, a cold trap 2.4, a purification tank 2.5, a weighing module 2.6 and an oil storage tank 2.8. The primary pumping mechanical pump 2.1 is connected to the purification tank 2.5 through a first vacuum pipeline. The purification tank 2.5 is sequentially connected to the cold trap 2.4, the diffusion pump 2.3 and the first pre-pumping mechanical pump 2.2 through a second vacuum pipeline. The purification tank 2.5 is connected to the oil storage tank 2.8 through an oil inlet pipeline. The purification tank 2.5 is arranged on the weighing module 2.6;

[0028] Specifically, the primary pumping mechanical pump 2.1 is arranged inside the main frame 1.1 and is connected to two purification tanks 2.5 through a vacuum pipeline and a valve. The first pre-pumping mechanical pump 2.2 is arranged inside the main frame 1.1 and is connected to the exhaust end of the diffusion pump 2.3 through a vacuum pipeline and a valve. The diffusion pump 2.3 is arranged inside the main frame 1.1. The exhaust end of the diffusion pump 2.3 is connected to the first pre-pumping mechanical pump 2.2 through a vacuum pipeline and a valve. The main pumping end of the diffusion pump 2.3 is connected to the cold trap 2.4 through a vacuum pipeline. The cold trap 2.4 is arranged on the main pumping pipeline of the diffusion pump 2.3 and is connected to two purification tanks 2.5 respectively through a vacuum pipeline and a valve. The purification tank 2.5 is arranged on the main frame 1.1 and is connected to the main frame 1.1 through a support structure. The weighing module 2.6 is arranged on the main frame 1.1 and is connected to the main frame 1.1 through a support structure. The magnetic stirring rod 2.7 is arranged on the main frame 1.1 and is placed directly below the purification tank 2.5 through a support. The oil storage tank 2.8 is arranged inside the main frame 1.1 and is connected to the purification tank 2.5 through a pipeline and a valve.

[0029] In this embodiment, the working mode of the silicone oil purification system 2 is as follows: This system adopts a set of diffusion pump 2.3 vacuum system to match two groups of purification tanks 2.5, and the oil storage tank 2.8 and the purification tank 2.5 correspond one by one, which can realize the purification of silicone oil in a single purification tank 2.5 or double purification tanks 2.5, or the purification of different silicone oils in two tanks. Manually fill the filtered silicone oil into the oil storage tank 2.8. When the roughing mechanical pump 2.1 evacuates the purification tank 2.5 to the set value and stops evacuating, due to the vacuum attraction, the silicone oil in the oil storage tank 2.8 will automatically enter the purification tank 2.5 through the oil supply pipeline. The purification tank 2.5 is equipped with a weighing system. When the purification tank 2.5 reaches the set weight, the oil inlet of the purification tank 2.5 stops. The roughing mechanical pump 2.1 evacuates the purification tank 2.5, and at the same time, the magnetic stirrer 2.7 starts and gradually reaches the set speed, and the heating jacket starts to heat up and gradually reaches the set temperature. The silicone oil in the purification tank 2.5 is initially purified by evacuating with the roughing mechanical pump 2.1, magnetic stirring, and heating. While the purification tank 2.5 is being filled with oil, the first roughing mechanical pump 2.2 evacuates the diffusion pump 2.3 and its pipeline to below the set value, and then the diffusion pump 2.3 is powered on for preheating for 30 minutes. After the vacuum degree of the purification tank 2.5 reaches below the set value, stop the roughing mechanical pump 2.1 from roughing the purification tank 2.5, and use the diffusion pump 2.3 to evacuate the purification tank 2.5, while magnetic stirring and heating are carried out at the same time. When the vacuum degree of the purification tank 2.5 is less than the set value, the purification of silicone oil is completed.

[0030] Refer to Figure 4 , the silicone oil filling system 3 includes a second roughing mechanical pump 3.1, a molecular pump 3.2, and an oil filling chamber 3.3. The roughing mechanical pump 2.1 is connected to the oil filling chamber 3.3 through a third vacuum pipeline, and the oil filling chamber 3.3 is sequentially connected to the molecular pump 3.2 and the second roughing mechanical pump 3.1 through a fourth pipeline.

[0031] Specifically, the silicone oil filling system 3 includes: a roughing mechanical pump 2.1, a second roughing mechanical pump 3.1, a molecular pump 3.2, an oil filling chamber 3.3, and a roughing mechanical pump 2.1, which is arranged inside the main frame 1.1 and is connected to two oil filling chambers 3.3 through vacuum pipelines and valves. The second roughing mechanical pump 3.1 is arranged inside the main frame 1.1 and is connected to the molecular pump 3.2 through vacuum pipelines and valves. The molecular pump 3.2 is arranged inside the main frame 1.1 and is connected to two oil filling chambers 3.3 through vacuum pipelines and valves. The oil filling chamber 3.3 is arranged inside the main frame 1.1 and is connected to the molecular pump 3.2 through vacuum pipelines and valves.

[0032] In this embodiment, the silicone oil filling system 3 works as follows: This system uses a set of molecular pump vacuum system to match two groups of oil filling chambers 3.3. The oil filling chambers 3.3 correspond to the purification tanks one by one, and single oil filling chamber 3.3 filling or double oil filling chamber 3.3 filling can be achieved. Each group of oil filling chambers 3.3 has multiple groups of oil filling valves. Manually connect the pressure transmitter to the oil filling chamber 3.3 through a pipeline. The initial pumping mechanical pump 2.1 evacuates the oil filling chamber 3.3 and at the same time evacuates the inner cavity of the pressure transmitter until the vacuum degree reaches below the set value. When manually installing the pressure transmitter, the second pre-pumping mechanical pump 3.1 evacuates the inner cavity of the molecular pump and the pipeline to below the set value. After the molecular pump is powered on to its industrial frequency, if the vacuum in the oil filling chamber 3.3 reaches the initial pumping vacuum setting, stop the initial pumping mechanical pump 2.1 from evacuating the oil filling chamber 3.3 and the pressure transmitter, and start the molecular pump to evacuate the oil filling chamber 3.3 and the pressure transmitter until the vacuum degree reaches below the set value. Then, fill the purified silicone oil in the purification tank into the oil filling chamber 3.3. The silicone oil is automatically filled into the pressure transmitter. After the pressure transmitter is filled, the pipeline between the oil filling chamber 3.3 and the pressure transmitter is automatically cut off. The remaining silicone oil in the oil filling chamber 3.3 returns to the purification tank through the oil return pipeline by means of vacuum suction. Manually remove the pressure transmitter to the next process.

[0033] Refer to Figure 5 , the electrical control system 4 includes a control panel 4.10 provided on the main frame 1.1. The control panel 4.10 is provided with a start button 4.11, a stop button 4.12, a molecular pump controller 4.7, a touch screen 4.8, an emergency stop button 4.9, a network cable interface 4.1, a high vacuum display screen 4.3 for the purification chamber, a high vacuum display screen 4.4 for the oil filling chamber, a low vacuum display screen 4.5 for the purification chamber, and a low vacuum display screen 4.6 for the oil filling chamber.

[0034] Specifically, the electrical control system 4 includes: a network cable interface 4.1, a gas source pressure display screen 4.2, a purification chamber high vacuum display screen 4.3, an oil filling chamber high vacuum display screen 4.4, a purification chamber low vacuum display screen 4.5, an oil filling chamber low vacuum display screen 4.6, a molecular pump controller 4.7, a touch screen 4.8, an emergency stop button 4.9, a control panel 4.10, a start button 4.11, and a stop button 4.12. The network cable interface 4.1 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The gas source pressure display screen 4.2 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The purification chamber high vacuum 4.3 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The oil filling chamber high vacuum 4.4 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The purification chamber low vacuum 4.5 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The oil filling chamber low vacuum 4.6 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The molecular pump controller 4.7 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The touch screen 4.8 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The emergency stop button 4.9 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The control panel 4.10 is connected to the main frame 1.1 through large cap screws. The start button 4.11 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10. The stop button 4.12 is set on the control panel 4.10 and is connected to the main frame 1.1 through the control panel 4.10.

[0035] In this embodiment, the working mode of the electrical control system is as follows: Press the start button 4.11, and the whole device is powered on. Press the power-on button of the molecular pump controller 4.7, and the molecular pump controller 4.7 is powered on. The network cable interface 4.1 can be connected to an external computer during debugging. The gas source pressure display screen 4.2 can display the gas source pressure of the device in real time. The purification chamber high vacuum display screen 4.3, the oil filling chamber high vacuum display screen 4.4, the purification chamber low vacuum display screen 4.5, and the oil filling chamber low vacuum display screen 4.6 can display the vacuum degree in the pipeline of each cavity in real time. Manual and automatic operations of the device can be realized on the touch screen 4.8, and the touch screen 4.8 displays the relevant technical parameters of the device.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic oil filling device for a pressure transmitter, characterized in that, It includes a frame and a silicone oil purification system and a silicone oil filling system provided on the frame; The silicone oil purification system includes a roughing mechanical pump, a first pre-pumping mechanical pump, a diffusion pump, a cold trap, a purification tank, a weighing module and an oil storage tank. The roughing mechanical pump is connected to the purification tank through a first vacuum pipeline. The purification tank is sequentially connected to the cold trap, the diffusion pump and the first pre-pumping mechanical pump through a second vacuum pipeline. The purification tank is connected to the oil storage tank through an oil inlet pipeline. The purification tank is provided on the weighing module. The silicone oil filling system includes a second pre-pumping mechanical pump, a molecular pump and an oil filling chamber. The roughing mechanical pump is connected to the oil filling chamber through a third vacuum pipeline. The oil filling chamber is sequentially connected to the molecular pump and the second pre-pumping mechanical pump through a fourth pipeline.

2. The automatic oil filling device for the pressure transmitter according to claim 1, characterized in that, The frame includes a main frame and an operating table. The two operating tables are symmetrically arranged on both sides of the main frame.

3. The automatic oil filling device for the pressure transmitter according to claim 2, characterized in that, There are two oil filling chambers and they are symmetrically arranged on the main frame. Each oil filling chamber is correspondingly connected to one purification tank.

4. The automatic oil filling device for the pressure transmitter according to claim 3, characterized in that, Detectors for monitoring the vacuum degree are provided in both the purification tank and the oil filling chamber.

5. The automatic oil filling device for the pressure transmitter according to claim 4, characterized in that, A magnetic stirrer is provided in the purification tank.

6. The automatic oil filling device for the pressure transmitter according to claim 5, characterized in that, A heating jacket is provided outside the purification tank.

7. The automatic oil filling device for the pressure transmitter according to claim 6, characterized in that, It also includes an electrical control system. The electrical control system includes a control panel provided on the main frame. The control panel is provided with a start button, a stop button, a molecular pump controller, a touch screen, an emergency stop button, a network cable interface, a high vacuum display screen for the purification chamber, a high vacuum display screen for the oil filling chamber, a low vacuum display screen for the purification chamber, and a low vacuum display screen for the oil filling chamber.

8. The automatic oil filling device for the pressure transmitter according to claim 7, characterized in that, A gas source power display screen is also provided on the control panel.

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