Steam pressure control system of chemical fiber vacuum box

Abstract

The utility model provides a steam pressure control system for a chemical fiber vacuum box, which is applied to the field of pressure control, and is characterized by comprising an air pressure sensor arranged on a drying box; the controller is in electric signal connection with the air pressure sensor and receives a detection signal of the air pressure sensor, and a pressure range is preset in the controller; the servo regulating valve is arranged on the air supply pipeline, the servo regulating valve is in electric signal connection with the controller, when a detection signal received by the controller is higher than a pressure range, the servo regulating valve is controlled to reduce the opening degree, and when the detection signal received by the controller is lower than the pressure range, the servo regulating valve is controlled to increase the opening degree; the drying box has the technical effects that the air pressure in the drying box can be stabilized, and the drying box is prevented from being broken down.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure control field especially relates to a chemical fiber vacuum box steam pressure control system. BACKGROUND

[0002] In the preparation process of chemical fiber products, the drying of chemical fiber raw materials is essential, and the drying quality directly affects the quality of chemical fiber products.

[0003] At present, most of the industry adopts the method of filling the drying box (i.e. vacuum box) filled with chemical fiber raw materials with industrial high-pressure steam to dry the raw materials. Since the industrial high-pressure steam is usually uniformly supplied, it is in a constant temperature and pressure state when delivered to the user end. Therefore, manufacturers will choose to install a pressure stabilizing valve on the gas supply pipeline to reduce the pressure value of the steam. However, in actual use, it is found that the stability of the pressure stabilizing valve is poor, which can easily cause pressure fluctuations, thereby causing the drying box to be punctured. The present inventor aims to seek a replacement solution to stabilize the pressure in the drying box. SUMMARY

[0004] The utility model aims at providing a chemical fiber vacuum box steam pressure control system, which has the advantages of stabilizing the air pressure in the drying box and avoiding the drying box from being punctured.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides the following technical scheme: a chemical fiber vacuum box steam pressure control system, comprising:

[0006] An air pressure sensor installed on the drying box;

[0007] A controller connected to the electrical signal of the air pressure sensor and receiving the detection signal of the air pressure sensor, wherein the controller is pre-set with a pressure range; and

[0008] A servo adjusting valve arranged on the gas supply pipeline, wherein the servo adjusting valve is connected to the electrical signal of the controller, and the controller controls the servo adjusting valve to reduce the opening degree when the received detection signal is higher than the pressure range, and controls the servo adjusting valve to increase the opening degree when the received detection signal is lower than the pressure range.

[0009] The pressure sensor detects the pressure value in the drying box, and the controller acquires and processes the pressure value in real time, and the processing method is to compare the pressure value with the set pressure range to determine whether the real-time pressure value is within the set pressure range, if yes, it is normal, if higher than the pressure range, the controller controls the servo regulating valve to reduce the opening degree to reduce the amount of steam entering the drying box from the gas supply pipeline, so as to reduce the pressure in the drying box, until the real-time pressure value falls within the pressure range again, if the real-time pressure value is lower than the pressure range, the controller controls the servo regulating valve to increase the opening degree, until the real-time pressure value falls within the pressure range again, the scheme adjusts the pressure value in the drying box in real time, so that the pressure value is within a certain range, and the drying box is prevented from being punctured.

[0010] In an embodiment of the present application, the opening and closing valve is arranged on the gas supply pipeline.

[0011] Through the above technical scheme, when the servo regulating valve fails, the opening and closing valve can be closed to protect the drying box.

[0012] In an embodiment of the present application, the alarm device is electrically connected to the controller, and the controller is provided with a limited time, and if the pressure value detected by the controller does not return to the pressure range within the limited time, the controller controls the alarm device to issue an alarm.

[0013] Through the above technical scheme, when the pressure value in the drying box does not return to the pressure range for a long time, it indicates that a fault has occurred, at this time the alarm device issues an alarm to remind the operator to close the opening and closing valve to protect the drying box and perform maintenance, thereby enhancing safety.

[0014] In an embodiment of the present application, the alarm device is an audible and visual alarm, and the opening and closing valve is a manual valve.

[0015] Through the above technical scheme, the audible and visual alarm reminds the operator to close the manual valve to protect the drying box.

[0016] In an embodiment of the present application, the opening and closing valve is an electric valve, and the electric valve is electrically connected to the controller and controlled by the controller.

[0017] Through the above technical scheme, the controller controls the opening and closing valve to close to protect the drying box.

[0018] As described above, the chemical fiber vacuum box steam pressure control system has the following beneficial effects:

[0019] The air pressure sensor detects the pressure value in the drying box, and the controller acquires and processes the pressure value in real time. The processing method is to compare with the set pressure range to determine whether the real-time pressure value is within the set pressure range. If yes, it is normal. If higher than the pressure range, the controller controls the servo regulating valve to reduce the opening degree to reduce the amount of steam entering the drying box from the gas supply pipeline, so as to reduce the pressure in the drying box until the real-time pressure value falls within the pressure range again. If the real-time pressure value is lower than the pressure range, the controller controls the servo regulating valve to increase the opening degree until the real-time pressure value falls within the pressure range again. The scheme adjusts the pressure value in the drying box in real time to keep the pressure value within a certain range, avoiding the drying box from being punctured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A schematic diagram of the chemical fiber vacuum box steam pressure control system disclosed in the embodiment of the present application is shown.

[0021] Explanation of technical feature labels in the drawings:

[0022] 1, drying box; 2, air pressure sensor; 3, controller; 4, servo regulating valve; 5, gas supply pipeline; 6, on-off valve. DETAILED DESCRIPTION

[0023] The implementation of the present application will be described below by specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0024] Please refer to Figure 1 The present application provides a chemical fiber vacuum box steam pressure control system, comprising:

[0025] The air pressure sensor 2 is installed on the drying box 1, and the air pressure sensor 2 is used to detect the pressure value in the drying box 1.

[0026] Please refer to Figure 1 It also includes a controller 3 connected to the electrical signal of the air pressure sensor 2 and receiving the detection signal of the air pressure sensor 2. The controller 3 has a pre-set pressure range. The specific value of the pressure range is determined according to the drying requirement. It needs to be within the safe range that the drying box 1 can withstand while meeting the drying requirement.

[0027] Please refer to Figure 1The controller 3 is electrically connected with the servo adjusting valve 4 arranged on the steam supply pipeline 5, and the controller 3 controls the servo system to work and reduce the opening of the servo adjusting valve 4 when the detection signal received by the controller 3 is higher than the pressure range, so as to reduce the steam amount entering the drying box 1 and reduce the pressure in the drying box 1, and the pressure value of the drying box 1 falls back to the set pressure range; and the controller 3 controls the servo adjusting valve 4 to increase the opening when the detection signal received by the controller 3 is lower than the pressure range, so as to increase the steam amount entering the drying box 1 and increase the pressure in the drying box 1, and the pressure value of the drying box 1 rises to the set pressure range, thereby dynamically adjusting the pressure in the drying box 1 to be in the safe range.

[0028] Please refer to Figure 1 The on-off valve 6 is arranged on the steam supply pipeline 5, and the alarm device is electrically connected with the controller 3; the controller 3 is provided with a limited time, which is greater than the time required for the normal pressure value to fall back to the pressure range, but needs to be less than the time required for the pressure value in the drying box 1 to rise from the safe range to the limit pressure value that the drying box 1 can withstand when the servo adjusting valve 4 is at the maximum opening; and the controller 3 controls the alarm device to give an alarm when the pressure value detected by the controller 3 does not fall back to the pressure range within the limited time, thereby further ensuring safety and protecting the drying box 1.

[0029] Please refer to Figure 1 In the embodiment, the on-off valve 6 is a manual valve, and the alarm device is an audible and light alarm device; the audible and light alarm device gives a stimulating sound and light to remind the operator to close the manual valve, so as to ensure that the drying box 1 will not be broken due to excessive pressure; in other embodiments, the manual valve can also be replaced by an electric valve, which is electrically connected with and controlled by the controller 3, and the operator controls the electric valve to be closed by inputting an instruction to the controller 3.

[0030] The pressure sensor 2 detects the pressure value in the drying box 1, and the controller 3 acquires and processes the pressure value in real time; the processing method is to compare the pressure value with the set pressure range, to determine whether the real-time pressure value is in the set pressure range; if yes, it is normal; if higher than the pressure range, the controller 3 controls the servo adjusting valve 4 to reduce the opening, so as to reduce the steam amount entering the drying box 1 from the steam supply pipeline 5 and reduce the pressure in the drying box 1, until the real-time pressure value falls back to the pressure range; if the real-time pressure value is lower than the pressure range, the controller 3 controls the servo adjusting valve 4 to increase the opening, until the real-time pressure value falls back to the pressure range; the scheme adjusts the pressure value in the drying box 1 in real time, so that the pressure value is in a certain range, and the drying box 1 is prevented from being broken.

[0031] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. All equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should still be covered by the claims of the present application.

Claims

1. A synthetic fiber vacuum box steam pressure control system, characterized by, The application relates to a pressure control system for a drying oven, comprising: a pressure sensor (2) installed on the drying oven (1); a controller (3) connected with the pressure sensor (2) and receiving the detection signal of the pressure sensor (2), wherein a pressure range is preset in the controller (3); and a servo regulating valve (4) arranged on a gas supply pipeline (5), wherein the servo regulating valve (4) is connected with the controller (3) in an electrical signal mode, the controller (3) controls the servo regulating valve (4) to reduce the opening degree when the detection signal received by the controller (3) is higher than the pressure range, and the controller (3) controls the servo regulating valve (4) to increase the opening degree when the detection signal received by the controller (3) is lower than the pressure range.

2. The synthetic fiber vacuum box steam pressure control system according to claim 1, wherein, The application further comprises an on-off valve (6) arranged on the gas supply pipeline (5).

3. The system according to claim 2, wherein, The application further comprises an alarm device connected with the controller (3) in an electrical signal mode, wherein a limited time is set in the controller (3), and the controller (3) controls the alarm device to give an alarm when the pressure value detected by the controller (3) does not return to the pressure range within the limited time.

4. The system according to claim 3, wherein the controller is configured to control the pressure in the vapor space of the vacuum chamber to a pressure of 0.1 to 0.5 Torr. The alarm device is an audible and light alarm, and the on-off valve (6) is a manual valve.

5. The system according to claim 3, wherein the vapor pressure control system is a vapor pressure control system for a chemical fiber vacuum box. The on-off valve (6) is an electric valve connected with the controller (3) in an electrical signal mode and controlled by the controller (3).

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