Automatic pressure regulating and controlling system for petroleum detection

Abstract

The utility model discloses an automatic pressure regulating and controlling system for petroleum detection, which is characterized by comprising a vacuumizing device and a pressure regulating and stabilizing control device, the vacuumizing device comprises a vacuum pump, a buffer tank connected with the vacuum pump and a test bottle connected with the buffer tank; negative pressure is generated in the buffer tank and the test bottle through the work of the vacuum pump; the voltage regulating and stabilizing control device comprises a touch industrial control computer, a control panel connected with the touch industrial control computer, a pressure sensor and a voltage regulating and stabilizing mechanism, wherein the pressure sensor and the voltage regulating and stabilizing mechanism are connected with the control panel. The pressure sensor is mounted on the side wall of the buffer tank; the voltage regulating and stabilizing mechanism comprises a stepping motor, and a transmission shaft is installed on an output shaft of the stepping motor. A valve seat with an air supplementing hole is arranged on the transmission shaft; the air supplementing hole is connected with the buffer tank; a valve element is arranged at the axial position in the valve seat. The limiting sensor is arranged at the upper part of the valve seat; the stepping motor drives the valve element to move left and right through the transmission shaft, so that the air inflow of the air supplementing hole in the valve seat is controlled, and the position of the valve element is limited through the limiting sensor. According to the utility model, the negative pressure of the system is controlled to be lower than 2 mmHg, and the precision reaches + / -0.03 mmHg.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pressure regulating and pressure control for petroleum, in particular to an automatic pressure regulating and pressure control system for petroleum detection. BACKGROUND

[0002] In the detection process of petroleum products, it is necessary to detect its performance at different negative pressure points. Therefore, a system with adjustable and constant pressure is required, and the pressure difference at different positions in the entire negative pressure system should be small, and ideally consistent.

[0003] At present, in the oil product detection industry, the negative pressure adjustable range is between close to absolute vacuum and 1 standard atmosphere, but the negative pressure precision control is about ±0.2mmHg, the system pressure difference is ±0.5mmHg, and most of them are manually adjusted and controlled. The operation is frequent during the detection process, the working strength is high, and it is easy to make mistakes.

[0004] And in the actual use process, the pressure control precision and the system pressure difference will be larger, so as to avoid the influence of low pressure control precision and large pressure difference between different positions on the detection result. UTILITY MODEL CONTENTS

[0005] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a small automatic pressure regulating and pressure control system for petroleum detection.

[0006] Through the work of the vacuum pump, negative pressure is generated in the buffer tank and the test bottle, and the automatic control pressure regulating and stabilizing mechanism is used to improve the overall pressure control performance of the system, so as to achieve wider pressure control range, higher pressure control precision, and at the same time improve the automation of the pressure control process and eliminate the errors caused by manual adjustment.

[0007] In order to achieve the purpose of the utility model, the technical scheme adopted is:

[0008] An automatic pressure regulating and pressure control system for petroleum detection, comprising:

[0009] vacuumizing device and pressure regulating and stabilizing control device,

[0010] The vacuumizing device includes a vacuum pump, a buffer tank connected with the vacuum pump, and a test bottle connected with the buffer tank; negative pressure is generated in the buffer tank and the test bottle through the work of the vacuum pump;

[0011] The pressure regulating and stabilizing control device includes a touch industrial computer, a control board connected with the touch industrial computer, and a pressure sensor and a pressure regulating and stabilizing mechanism connected with the control board;

[0012] The pressure sensor is installed on the side wall of the buffer tank;

[0013] The voltage regulating and stabilizing mechanism comprises a stepping motor, and a transmission shaft is installed on an output shaft of the stepping motor;

[0014] A valve seat with a gas supplement hole is arranged on the transmission shaft;

[0015] The gas supplement hole is connected with the buffer tank;

[0016] A valve core is arranged at an axial position in the valve seat;

[0017] A limit sensor is arranged on an upper portion of the valve seat;

[0018] The stepping motor drives the valve core to move left and right through the transmission shaft, so that the air intake of the gas supplement hole on the valve seat is controlled, and the position of the valve core is limited through the limit sensor.

[0019] In one preferred embodiment of the present application, the vacuum pump and the buffer tank are connected through a hose.

[0020] In one preferred embodiment of the present application, the buffer tank and the test bottle are connected through a hard pipe.

[0021] In one preferred embodiment of the present application, the hard pipe is made of stainless steel.

[0022] In one preferred embodiment of the present application, the valve seat is arranged on the buffer tank through a sealing gasket.

[0023] In one preferred embodiment of the present application, the valve core is arranged in the valve seat through a sealing ring and is threadedly connected with the valve body.

[0024] The present application has the following beneficial effects:

[0025] The automatic pressure regulating and controlling system for petroleum detection can effectively avoid pressure fluctuation and large pressure difference between different positions in the system, improve the overall pressure control performance of the equipment, and has a wide negative pressure control range. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The figure is a structural schematic diagram of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application is further described in detail below through the drawings and examples. However, it should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the scope of the present application. In addition, in the following structure, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0028] In the description of the utility model, it needs to be explained that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] As shown in the utility model discloses an automatic pressure regulating and controlling system for petroleum detection, including vacuumizing device 10 and pressure regulating and controlling device 20 two parts. Figure 1

[0030] Vacuumizing device 10 further includes vacuum pump 11, buffer tank 12 connected with vacuum pump 11 through hose 13 and test bottle 14 connected with buffer tank 12 through hard tube 15 of stainless steel material.

[0031] Through the work of vacuum pump 11 makes buffer tank 12 and test bottle 14 produce negative pressure.

[0032] Pressure regulating and controlling device 20 includes touch industrial computer 21, control panel 22 connected with touch industrial computer 21 through line and pressure sensor 23 and pressure regulating and controlling mechanism 24 connected with control panel 22 through line.

[0033] Pressure sensor 23 is installed on the side wall of buffer tank 12, and pressure regulating and controlling mechanism 24 includes stepper motor 241, transmission shaft 243 is installed on the output shaft of stepper motor 241, transmission shaft 243 is movably connected with valve core 244, valve core 244 is arranged in valve seat 242 with air supplementing hole 2421 through thread and sealing ring 247, air supplementing hole 2421 is connected with buffer tank 12.

[0034] Limiting sensor 245 for limiting position detection of valve core 244 is arranged on the upper portion of valve seat 242, and stepper motor 241 drives valve core 244 to move left and right through transmission shaft 243, thereby controlling the air intake of air supplementing hole 2421 on valve seat 242, and limiting the position of valve core 244 through limiting sensor 245.

[0035] Pressure regulating and controlling mechanism 24 rotates through stepper motor 241, drives transmission shaft 243 and valve core 244 with two sealing rings, controls valve core 244 with two sealing rings to move left and right, thereby controlling the air intake of air supplementing hole, and limiting sensor 245 detects the moving position of valve core 244 with two sealing rings and limits its position at the same time.

[0036] ​The touch industrial computer 21 is connected with the control panel 22 through a data signal line and connected with the vacuum pump 11 through a signal control line; the control panel 22 is connected with the pressure sensor 23 and the stepping motor 241 and the limit sensor 245 of the pressure regulating and stabilizing mechanism 24 through a data signal line; the pressure sensor 24 is installed on the side wall of the buffer tank 12, the pressure regulating and stabilizing mechanism 24 is installed on the top surface of the buffer tank 12 through a sealing gasket 246, and the air supplement hole of the valve seat 242 with the air supplement hole 2421 is communicated with the buffer tank 12.

[0037] The vacuumizing device is connected with the pressure regulating and stabilizing mechanism, in the pressure control range from standard atmospheric pressure to negative pressure lower than 2mmHg, the negative pressure in the buffer tank and the test bottle can be controlled at a certain negative pressure point at will, and the pressure control precision reaches ±0.03mmHg, and the regional pressure difference control is ±0.1mmHg.

[0038] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above.

[0039] It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic pressure regulating and controlling system for petroleum detection, characterized in that, The utility model relates to a kind of vacuum pumping device and pressure regulating and stabilizing control device, including: Vacuum pumping device and pressure regulating and stabilizing control device two parts, The vacuum pumping device includes vacuum pump, buffer tank connected with the vacuum pump and test bottle connected with buffer tank by connecting;Through the vacuum pump work makes that buffer tank and test bottle produce negative pressure; The pressure regulating and stabilizing control device includes touch industrial computer, control panel connected with touch industrial computer and pressure sensor and pressure regulating and stabilizing mechanism connected with control panel; The pressure sensor is installed on the lateral wall of buffer tank; The pressure regulating and stabilizing mechanism includes stepper motor, transmission shaft is installed on the output shaft of the stepper motor; Valve seat with air hole is set on the transmission shaft; The air hole is connected with the buffer tank; Valve core is set in the axial position in the valve seat; Limiting sensor is set on the upper portion of the valve seat; The stepper motor drives valve core to move left and right by transmission shaft, to control the air intake of air hole on valve seat, and the position of valve core is limited by the limiting sensor.

2. The automatic pressure regulating and controlling system for oil detection according to claim 1, wherein, The vacuum pump is connected with the buffer tank by hose.

3. The automatic pressure regulating and controlling system for oil detection according to claim 1, wherein, The buffer tank is connected with the test bottle by hard tube.

4. The automatic pressure regulating and controlling system for oil detection according to claim 1, wherein, The hard tube is stainless steel material.

5. The automatic pressure regulating and controlling system for oil detection according to claim 1, wherein, The valve seat is set on the buffer tank by sealing pad.

6. The automatic pressure regulating and controlling system for oil detection according to claim 1, wherein, The valve core is set in the valve seat by sealing ring, and is connected with valve body by screw thread.

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