Suction force detection device for chinlon filament production monomer suction device

Abstract

The utility model relates to a suction force detection device for a chinlon filament production monomer suction device. The suction device comprises a suction cover, a suction hose, a water return pipe and a nozzle, the water return pipe is a T-shaped pipe, and the T-shaped pipe comprises a main pipe opening, a branch pipe opening I and a branch pipe opening II; the nozzle is connected with the branch pipe orifice I; pipe openings in the two ends of the suction hose are marked as a pipe opening I and a pipe opening II respectively, the pipe opening I is connected with the suction cover, the pipe opening II is connected with the main pipe opening, and the detection device comprises a pressure sensor I and a pressure sensor II. The pressure sensor I and the pressure sensor II are respectively arranged at the pipe orifice I and the pipe orifice II; the pressure sensor I is used for detecting the pressure value at the pipe orifice I, and the pressure sensor I is used for detecting the pressure value at the pipe orifice II. According to the utility model, the suction effect of the suction device can be checked on line, and meanwhile, the buzzer alarms when abnormal blockage occurs in the operation of the suction device, so that the product stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection, and relates to a suction detection device for a monomer suction device used in nylon filament production. Background Art

[0002] During the nylon spinning process, the monomers in the melt will volatilize and form white powder near the spinning window when it is cooled, which seriously affects the product quality and pollutes the environment. At present, suction devices are generally used to collect nylon monomers. Figure 1 As shown, the suction device includes a suction hood 1, a suction hose 3 and a circulating water pipe; the circulating water pipe includes a main water pipe 11, multiple branch water pipes, a regulating valve 10, a water pressure gauge 6, a nozzle 5, a return pipe 7, a water pipe I, a water pipe II, a water reservoir, and a water pump; the side wall of the main water pipe 11 is connected to one end of the multiple branch water pipes; a regulating valve 10 and a water pressure gauge 6 are respectively provided on the multiple branch water pipes, the regulating valve 10 is located between the main water pipe 11 and the water pressure gauge 6, and the nozzle 5 is installed at the other end of the branch water pipe; the return pipe 7 is T The T-tube comprises a main pipe port, a branch pipe port I and a branch pipe port II; the branch pipe port I is opposite to the branch pipe port II, and the central axis of the main pipe port is perpendicular to the central axis of the branch pipe port I; the nozzle is connected to the branch pipe port I, one end of the water pipe I is connected to the branch pipe port II, and the other end is connected to the water reservoir; a water pump is provided in the water reservoir, the water pump is used to pump water, the water pump is connected to one end of the water pipe II, and the other end of the water pipe II is connected to the main water pipe 11; one end of the suction hose 3 is connected to the suction hood 1, and the other end is connected to the main pipe port.

[0003] During specific use, the water pump is started first, and then the water pressure is adjusted through the regulating valve 10 to make the water pressure of each branch water pipe consistent. The high-pressure water flows out from the nozzle 5 of the branch water pipe, driving the air in the T-tube to move from top to bottom, thereby forming a low pressure. Under the action of the pressure difference, the outside atmosphere continuously enters the return pipe 7 from the main port, and dissolves the nylon monomer carried in the air in the water.

[0004] However, there are two problems with the suction device during long-term use. On the one hand, the nylon monomer is deposited in the suction hose, causing the hose to be blocked, and the suction effect is weakened or there is no suction effect at all. On the other hand, scale, impurities, welding slag, etc. in the circulating water block the nozzle, which also causes the suction effect to be weakened or there is no suction effect at all. In either case, it will cause more broken ends at the spinning position, dyeing deviation and other problems, seriously affecting product quality.

[0005] Utility model patent CN206161225U discloses a nylon suction force detection device, which has a simple structure and its main components are a suction force tester, a connecting pipe and a fixing part. However, during the test, the pipe connected to the monomer suction hood needs to be removed, which affects normal production. Utility model patent CN216485014U discloses a device for online detection of the suction capacity of the nylon spinning monomer suction system, which adds a suction negative pressure branch pipe corresponding to the suction negative pressure main pipe, and indirectly judges the flow of the main pipe by the flow of the branch pipe. However, the branch pipe is directly connected to the outside world, which will waste the suction force of the system and cannot intuitively reflect the suction effect of the main pipe. Moreover, the above-mentioned detection devices cannot detect whether the nozzle is blocked.

[0006] Although water pressure gauges are provided on the branch water pipes in the suction device, when one of the nozzles is blocked, the water pressure gauge reading hardly changes. Even if the prior art can close the remaining regulating valves and only keep one regulating valve open, and determine whether it is blocked by the water pressure gauge value (the value when blocked is different from the value when not blocked), such detection will affect production (it will affect the suction of the monomer by the branch water pipe that is not blocked).

[0007] Therefore, it is of great significance to study a suction detection device for a monomer suction device used in nylon filament production to solve the above problems. Utility Model Content

[0008] The utility model aims to solve the problems existing in the prior art and provides a suction force detection device for a monomer suction device used in nylon filament production.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0010] A suction force detection device for a monomer suction device for nylon filament production, the suction device comprises a suction hood, a suction hose, a return pipe and a nozzle; the return pipe is a T-shaped pipe, the T-shaped pipe comprises a main port, a branch port I and a branch port II; the branch port I and the branch port II are opposite, and the central axis of the main port is perpendicular to the central axis of the branch port I; the nozzle is connected to the branch port I, and water in the nozzle is sprayed into the return pipe and flows out from the branch port II; the ports at both ends of the suction hose are respectively marked as port I and port II, the port I is connected to the suction hood, and the port II is connected to the main port, and the detection device comprises a pressure sensor I and a pressure sensor II; the pressure sensor I and the pressure sensor II are respectively arranged at the port I and the port II; the pressure sensor I is used to detect the pressure value at the port I, and the pressure sensor I is used to detect the pressure value at the port II.

[0011] When the suction hose is blocked and the nozzle is operating normally, there is still a negative pressure area between the blocked position of the suction hose and the return pipe, the pressure value of pressure sensor II is normal or fluctuates slightly, there is no negative pressure effect at pressure sensor I, and the pressure value increases to be equal to the external atmospheric pressure; when the suction hose is not blocked and the nozzle is blocked, no negative pressure is formed in the return pipe, and the pressure values ​​of pressure sensor I and pressure sensor II both increase to be equal to the external atmospheric pressure; therefore, in the actual suction process, if the pressure value of pressure sensor I increases, the suction device is blocked, and on this basis, if the pressure value of pressure sensor II is normal or fluctuates slightly (the fluctuation amplitude does not exceed 0.01 kPa), the suction hose is blocked, and if the pressure value of pressure sensor II also increases, the nozzle is blocked.

[0012] As the preferred technical solution:

[0013] A suction force detection device for a monomer suction device for nylon filament production as described above, the suction force detection device also includes a PLC controller;

[0014] The PLC controller is electrically connected to the pressure sensor I and the pressure sensor II respectively, and is used to receive the pressure values ​​sent by the pressure sensor I and the pressure sensor II.

[0015] A suction force detection device for a monomer suction device for nylon filament production as described above, the suction force detection device also includes an alarm;

[0016] The PLC controller is electrically connected to the alarm; when the pressure value sent by pressure sensor I received by the PLC controller is greater than the alarm value A, the alarm will sound; when the pressure value sent by pressure sensor II received by the PLC controller is greater than the alarm value B, the alarm will sound. Alarm value A and alarm value B are set according to the lower limit of the required suction force. The larger the alarm value A and alarm value B, the longer the cleaning cycle.

[0017] As described above, a suction detection device for a nylon filament production monomer suction device is provided, along the direction from the pipe opening II to the pipe opening I in the suction hose, a baffle is respectively provided in front of the pressure sensor I and the pressure sensor II, and the baffle does not completely cover the cross section of the suction hose. The baffle is provided to prevent the airflow from driving the nylon filament production monomer to be deposited on the pressure sensor I and the pressure sensor II, thereby affecting the detection of the pressure value.

[0018] In the suction force detection device for a monomer suction device for nylon filament production as described above, the alarm is a buzzer alarm.

[0019] In the suction force detection device for a monomer suction device used in nylon filament production as described above, both pressure sensor I and pressure sensor II are diffused silicon pressure sensors.

[0020] As described above, a suction detection device for a monomer suction device for nylon filament production, the suction device also includes a main water pipe, multiple branch water pipes, a regulating valve, a water pressure gauge, a water pipe I, a water pipe II, a water reservoir and a water pump; the number of suction hoods, suction hoses, return pipes and nozzles are the same as the number of branch water pipes; the side wall of the main water pipe is connected to one end of the multiple branch water pipes; the multiple branch water pipes are respectively provided with a regulating valve and a water pressure gauge, the regulating valve is located between the main water pipe and the water pressure gauge, and the nozzles are respectively installed at the other end of the multiple branch water pipes; one end of the water pipe I is connected to the branch pipe port II, and the other end is connected to the water reservoir; a water pump is provided in the water reservoir, the water pump is used to pump water, the water pump is connected to one end of the water pipe II, and the other end of the water pipe II is connected to the main water pipe.

[0021] Beneficial effects:

[0022] (1) The utility model is a suction force detection device for a monomer suction device for nylon filament production, which can realize online inspection of the suction effect of the suction device. At the same time, when the suction device is abnormally blocked during operation, a buzzer alarm is used to promptly remind on-site employees to handle it, thereby avoiding poor product operability and quality fluctuations caused by abnormal suction, and improving product stability;

[0023] (2) The utility model is a suction force detection device for a monomer suction device for nylon filament production, which detects the pressure of an internal pressure detection point through a pressure sensor I and a pressure sensor II, and intuitively judges the suction effect with accurate results without causing waste of suction force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the use of a monomer suction device for producing nylon filament in the prior art;

[0025] Figure 2 Schematic diagram of the use of a suction force detection device for a monomer suction device for nylon filament production;

[0026] Among them, 1-suction hood, 2-pressure sensor I, 3-suction hose, 4-pressure sensor II, 5-nozzle, 6-water pressure gauge, 7-return pipe, 8-PLC controller, 9-buzzer, 10-regulating valve, 11-main water pipe. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0028] A suction force detection device for a monomer suction device for nylon filament production, such as Figure 2 As shown, it includes a pressure sensor I2, a pressure sensor II 4, a PLC controller 8 and an alarm;

[0029] The suction device comprises a suction hood 1, a suction hose 3, a water return pipe 7, a nozzle 5, a main water pipe 11, five branch water pipes, a regulating valve 10, a water pressure gauge 6, a water pipe I, a water pipe II, a water reservoir and a water pump;

[0030] The number of the suction hood 1, the suction hose 3, the return pipe 7 and the nozzle 5 is the same as the number of the branch water pipes; the side wall of the main water pipe 11 is connected to one end of the plurality of branch water pipes; the plurality of branch water pipes are respectively provided with a regulating valve 10 and a water pressure gauge 6, the regulating valve 10 is located between the main water pipe 11 and the water pressure gauge 6, and the nozzles 5 are respectively installed at the other ends of the plurality of branch water pipes;

[0031] The return pipe 7 is a T-shaped pipe, which includes a main pipe port, a branch pipe port I and a branch pipe port II; the branch pipe port I and the branch pipe port II are opposite, and the central axis of the main pipe port is perpendicular to the central axis of the branch pipe port I; the nozzle 5 is connected to the branch pipe port I, and the water in the nozzle 5 is sprayed into the return pipe 7 and flows out from the branch pipe port II;

[0032] The two ends of the suction hose 3 are marked as pipe opening I and pipe opening II, respectively. Pipe opening I is connected to the suction hood 1, and pipe opening II is connected to the main pipe opening; one end of the water pipe I is connected to the branch pipe opening II, and the other end is connected to the water reservoir; a water pump is provided in the water reservoir, and the water pump is used to pump water. The water pump is connected to one end of the water pipe II, and the other end of the water pipe II is connected to the main water pipe 11;

[0033] Pressure sensor I 2 and pressure sensor II 4 are both diffused silicon pressure sensors; pressure sensor I 2 and pressure sensor II 4 are respectively arranged at pipe mouth I and pipe mouth II; pressure sensor I 2 is used to detect the pressure value at pipe mouth I, and pressure sensor I 2 is used to detect the pressure value at pipe mouth II;

[0034] Along the direction from the pipe opening II to the pipe opening I in the suction hose 3, a baffle is respectively arranged in front of the pressure sensor I 2 and the pressure sensor II 4 to prevent the nylon filament production monomer from being deposited on the pressure sensor I and the pressure sensor II and affecting the detection of the pressure value;

[0035] The PLC controller 8 is electrically connected to the pressure sensor I 2 and the pressure sensor II 4 respectively, and is used to receive the pressure values ​​sent by the pressure sensor I 2 and the pressure sensor II 4;

[0036] The alarm is a buzzer 9; the PLC controller 8 is electrically connected to the alarm. When the pressure value sent by the pressure sensor I 2 received by the PLC controller 8 is greater than the alarm value A, the alarm sounds. When the pressure value sent by the pressure sensor II 4 received by the PLC controller 8 is greater than the alarm value B, the alarm sounds.

[0037] Specific usage process: when the suction hose is blocked 3 and the nozzle 5 is operating normally, there is still a negative pressure area between the blocked position of the suction hose 3 and the return pipe 7, the pressure value of the pressure sensor II 4 is normal or fluctuates slightly, there is no negative pressure effect at the pressure sensor I, and the pressure value increases to be equal to the external atmospheric pressure; when the suction hose is not blocked and the nozzle is blocked, no negative pressure is formed in the return pipe 7, and the pressure values ​​of the pressure sensors I 2 and II 4 both increase to be equal to the external atmospheric pressure; therefore, in the actual suction process, if the pressure value of the pressure sensor I 2 increases, the suction device is blocked, and on this basis, if the pressure value of the pressure sensor II 4 is normal or fluctuates slightly, the suction hose 3 is blocked, and if the pressure value of the pressure sensor II 4 also increases, the nozzle is blocked.

Claims

1. A suction force detection device for a monomer suction device for nylon filament production, the suction device comprising a suction hood (1), a suction hose (3), a return pipe (7) and a nozzle (5); the return pipe (7) is a T-shaped pipe, the T-shaped pipe comprising a main pipe port, a branch pipe port I and a branch pipe port II; the branch pipe port I and the branch pipe port II are opposite, and the central axis of the main pipe port is perpendicular to the central axis of the branch pipe port I; the nozzle (5) is connected to the branch pipe port I; the pipe ports at both ends of the suction hose (3) are respectively marked as pipe port I and pipe port II, the pipe port I is connected to the suction hood (1), and the pipe port II is connected to the main pipe port, characterized in that The detection device comprises a pressure sensor I (2) and a pressure sensor II (4); the pressure sensor I (2) and the pressure sensor II (4) are respectively arranged at the pipe mouth I and the pipe mouth II; the pressure sensor I (2) is used to detect the pressure value at the pipe mouth I, and the pressure sensor I (2) is used to detect the pressure value at the pipe mouth II.

2. A suction force detection device for a monomer suction device for nylon filament production according to claim 1, characterized in that: The suction force detection device also includes a PLC controller; The PLC controller is electrically connected to the pressure sensor I (2) and the pressure sensor II (4) respectively, and is used to receive the pressure values ​​sent by the pressure sensor I (2) and the pressure sensor II (4).

3. A suction force detection device for a monomer suction device for nylon filament production according to claim 2, characterized in that: The suction force detection device also includes an alarm; The PLC controller is electrically connected to the alarm; when the pressure value sent by the pressure sensor I (2) received by the PLC controller is greater than the alarm value A, the alarm sounds an alarm; when the pressure value sent by the pressure sensor II (4) received by the PLC controller is greater than the alarm value B, the alarm sounds an alarm.

4. A suction force detection device for a monomer suction device for nylon filament production according to claim 3, characterized in that: Along the direction from the pipe opening II to the pipe opening I in the suction hose (3), a baffle is respectively arranged in front of the pressure sensor I (2) and the pressure sensor II (4) to prevent the nylon filament production monomer from being deposited on the pressure sensor I (2) and the pressure sensor II (4).

5. The suction force detection device for a monomer suction device for nylon filament production according to claim 3, characterized in that: The alarm is a buzzer alarm.

6. The suction force detection device for a monomer suction device for nylon filament production according to claim 3, characterized in that: Both pressure sensor I (2) and pressure sensor II (4) are diffused silicon pressure sensors.

7. The suction force detection device for a monomer suction device for nylon filament production according to claim 1, characterized in that: The suction device further comprises a main water pipe (11), a plurality of branch water pipes, a regulating valve (10), a water pressure gauge (6), a water pipe I, a water pipe II, a water reservoir and a water pump; the number of the suction hood (1), the suction hose (3), the return pipe (7) and the nozzle (5) is the same as the number of the branch water pipes; the side wall of the main water pipe (11) is connected to one end of the plurality of branch water pipes; the plurality of branch water pipes are respectively provided with a regulating valve (10) and a water pressure gauge (6), the regulating valve (10) being located between the main water pipe (11) and the water pressure gauge (6), and the nozzles (5) are respectively installed at the other end of the plurality of branch water pipes; One end of the water pipe I is connected to the branch pipe port II, and the other end is connected to the water reservoir; a water pump is provided in the water reservoir, the water pump is connected to one end of the water pipe II, and the other end of the water pipe II is connected to the main water pipe (11).

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