A leakage monitoring device for a toluene delivery magnetic pump

Abstract

The utility model relates to magnetic force pump technical field provides a kind of leakage monitoring device of toluene conveying magnetic force pump, including base, the bearing pedestal for installing magnetic force driver, motor is located on base, motor is connected between magnetic force driver by connector;Vibration sensor is pasted on bearing pedestal, the two sides of magnetic force driver are respectively equipped with first infrared detection board and second infrared detection board including arc mounting face, non-contact temperature sensor is equipped in arc mounting face, coaxality detector is equipped in connector lower portion.The utility model realizes indirect determination whether magnetic force pump has leaked and the predication that possibly leaks by temperature monitoring, vibration monitoring and coaxality monitoring, protects the safety of magnetic force pump and toluene conveying pipeline, reduces monitoring cost simultaneously, improves the general applicability of magnetic force pump monitoring device.

Description

Technical Field

[0001] This application relates to the field of magnetic pump technology, specifically to a leakage monitoring device for a toluene delivery magnetic pump. Background Technology

[0002] Toluene is a volatile organic liquid, and in existing technologies, it is typically transported using a magnetic pump. A magnetic pump consists of three parts: a self-priming pump, a magnetic drive, and an electric motor. The key component, the magnetic drive, comprises an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic isolation sleeve. A rupture or even a small leak in this isolation sleeve will cause leakage in the magnetic pump. Therefore, monitoring of the isolation sleeve is usually necessary. Generally, a leak detector is used to directly monitor whether there is any leaking substance inside the isolation sleeve. However, this direct monitoring method is costly and not universally applicable. Therefore, this invention provides a leak monitoring device for a toluene transport magnetic pump. Summary of the Invention

[0003] This utility model provides a leakage monitoring device for a toluene delivery magnetic pump, which solves the problem that existing magnetic pumps for toluene delivery require costly and uncommon detection equipment for leakage monitoring, resulting in drawbacks in their use.

[0004] This utility model discloses a leakage monitoring device for a toluene delivery magnetic pump, including a base, a bearing seat for mounting a magnetic drive, and a motor mounted on the base. The motor and the magnetic drive are connected by a connector. A vibration sensor is attached to the bearing seat. A first infrared detection plate and a second infrared detection plate with an arc-shaped mounting surface are respectively provided on both sides of the magnetic drive. A non-contact temperature sensor is provided in the arc-shaped mounting surface. A coaxiality detector is provided under the connector.

[0005] This invention utilizes three different indirect monitoring devices to monitor a magnetic pump that transports toluene. First, a vibration sensor on the bearing housing detects the vibration frequency and amplitude of the rotor in the magnetic drive. Unstable vibration frequency or amplitude indicates that the rotor may be unbalanced or misaligned due to cavitation. Second, a first and second infrared detection plate monitors the temperature of the bearings and rotor in the magnetic drive across the entire horizontal plane. Excessive temperature is a precursor to damage to the sealing of the isolation sleeve in the magnetic drive, which will directly lead to leakage in the magnetic pump. Third, a coaxiality detector detects the coaxiality of the connector between the motor and the magnetic drive. If the coaxiality does not meet preset conditions, it indicates that cavitation has occurred on the drive shaft inside the magnetic drive or that the internal isolation sleeve has been damaged.

[0006] In summary, the magnetic pump provided in this solution indirectly determines whether there is an internal leak. Specifically, monitoring the vibration frequency and amplitude of the rotor in the magnetic drive, or monitoring the coaxiality of the connector between the magnetic drive and the motor, can indirectly determine whether there is already a leak inside the magnetic pump; monitoring the temperature of the bearings or rotor in the magnetic drive is a predictive measure for potential leaks inside the magnetic pump.

[0007] Optionally, the connector has a first connecting shaft and a second connecting shaft, the end of the first connecting shaft and the end of the second connecting shaft are connected by a flange or a coupling; the first detection end and the second detection end of the coaxiality detector are respectively located below the first connecting shaft and the second connecting shaft; the other end of the first connecting shaft is used to connect to the motor.

[0008] In this design, the two detection ends of the coaxiality detector monitor the coaxiality of the second connecting shaft connected to the magnetic drive and the first connecting shaft connected to the motor, respectively. Comparing the coaxiality of these two shafts determines whether cavitation may occur in the internal drive shaft of the magnetic drive or whether the internal isolation sleeve may be damaged, thereby determining whether the magnetic pump may be leaking. This solution enables the prediction of potential leaks within the magnetic pump, while simultaneously improving the accuracy of coaxiality detection and enhancing the accuracy of identifying internal leaks in the magnetic drive.

[0009] Optionally, the magnetic drive includes a pump body, an impeller, a pump cover, a pump shaft, a rotor, an isolation sleeve, an inner magnetic cylinder, an outer magnetic cylinder, and a bearing housing. The impeller is connected to the pump shaft and is located within the pump body. The inner magnetic cylinder is sleeved with the outer magnetic cylinder. The isolation sleeve is located between the inner magnetic cylinder and the outer magnetic cylinder and is sealed to the pump cover. The bearing housing is used to connect to the other end of the second connecting shaft.

[0010] Optionally, the non-contact temperature sensor is an infrared temperature sensor.

[0011] In this design, an infrared temperature sensor is used as the non-contact temperature sensor to improve the accuracy of temperature detection.

[0012] Optionally, the first infrared detection board and the second infrared detection board are mirror images of each other on the base.

[0013] In this design, the first infrared detection board and the second infrared detection board are set up in a mirror image, so that the infrared temperature sensor in the arc-shaped mounting surface can monitor the entire horizontal plane where the magnetic drive is installed. This achieves full coverage of the magnetic drive by the detection sensor, thereby improving the accuracy of temperature detection.

[0014] In summary, the beneficial effects of this utility model are as follows:

[0015] This utility model provides a leakage monitoring device for a toluene delivery magnetic pump. Through temperature monitoring, vibration monitoring, and coaxiality monitoring, it indirectly determines whether there is already a leak in the magnetic pump and predicts the possibility of leakage. This protects the safety of the magnetic pump and the toluene delivery pipeline, while reducing monitoring costs and improving the universal applicability of the magnetic pump monitoring device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a leakage monitoring device for a toluene delivery magnetic pump provided in this application;

[0017] Figure 2 This is a front structural schematic diagram of the leakage monitoring device for the toluene delivery magnetic pump provided in the embodiments of this application.

[0018] In the picture:

[0019] 1: Base; 2: Bearing housing; 21: Vibration sensor; 3: Motor; 4: Connector; 41: First connecting shaft; 42: Second connecting shaft; 5: First infrared detection plate; 6: Second infrared detection plate; 7: Coaxiality detector; 8: Magnetic drive. Detailed Implementation

[0020] The technical solutions in the embodiments of the application will now be clearly and completely described with reference to the accompanying drawings. Furthermore, the phrases "in one embodiment" or "in one embodiment" appearing throughout this specification do not necessarily refer to the same embodiment. Moreover, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0021] Toluene is a volatile organic liquid, and in existing technologies, it is typically transported using a magnetic pump. A magnetic pump consists of three parts: a self-priming pump, a magnetic drive 8, and an electric motor. The key component, the magnetic drive 8, comprises an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic isolation sleeve. A rupture or minor seepage in this isolation sleeve will cause leakage in the magnetic pump. Therefore, monitoring of the isolation sleeve is usually necessary. Generally, a leak detector is used to directly monitor whether there is any leaking substance inside the isolation sleeve. However, this direct monitoring method is costly and not widely applicable. Therefore, this invention provides a leakage monitoring device for a toluene transport magnetic pump. This addresses the problem that existing magnetic pumps for toluene transport require costly and widely applicable detection equipment for leakage monitoring, resulting in drawbacks in their use.

[0022] Please refer to the appendix for details. Figure 1 and Figure 2 As shown.

[0023] This utility model discloses a leakage monitoring device for a toluene delivery magnetic pump, such as... Figure 1As shown, the device includes a base 1, a bearing housing 2 for mounting a magnetic drive 8, and a motor 3 mounted on the base 1. The motor 3 is connected to the magnetic drive 8 via a connector 4. A vibration sensor 21 is attached to the bearing housing 2. A first infrared detection plate 5 and a second infrared detection plate 6, each with an arc-shaped mounting surface, are respectively provided on both sides of the magnetic drive 8. A non-contact temperature sensor is located within the arc-shaped mounting surface. A coaxiality detector 7 is located below the connector 4. The aforementioned bearing housing 2 is vertically mounted on the base 1 and connected to the external structure of the magnetic drive 8, serving to assist in supporting the magnetic drive 8. The base 1 is used to fix the magnetic pump and can be connected to any plane; this invention does not impose specific limitations in this regard.

[0024] The aforementioned magnetic drive 8 includes a pump body, impeller, pump cover, pump shaft, rotor, isolation sleeve, inner magnetic cylinder, outer magnetic cylinder, and bearing housing. The impeller is connected to the pump shaft and is located inside the pump body. The inner magnetic cylinder is sleeved with the outer magnetic cylinder. The isolation sleeve is located between the inner and outer magnetic cylinders and is sealed to the pump cover. The bearing housing is used to connect with the second connecting shaft 42. This part is a necessary existing structure of the magnetic drive part of the magnetic pump. The connection structure is mature and well known to those skilled in the art. For details, please refer to existing online materials. Therefore, its specific structure is not shown in the drawings and is not described in detail here.

[0025] In addition, the connector 4 between the aforementioned motor 3 and magnetic drive 8 includes a first connecting shaft 41 and a second connecting shaft 42. The end of the first connecting shaft 41 and the end of the second connecting shaft 42 are connected by a flange or coupling. The first detection end and the second detection end of the coaxiality detector 7 are respectively located below the first connecting shaft 41 and the second connecting shaft 42. The other end of the first connecting shaft 41 is used to connect with the motor 3.

[0026] The magnetic pump provided in this solution indirectly determines whether there is an internal leak. Specifically, monitoring the vibration frequency and amplitude of the rotor in the magnetic drive 8, or monitoring the coaxiality of the connector 4 between the magnetic drive 8 and the motor 3, can indirectly determine whether there is an internal leak in the magnetic pump; monitoring the temperature of the bearings or rotor in the magnetic drive 8 is a prediction of possible leaks in the magnetic pump.

[0027] Specifically, on the one hand, vibration monitoring is used to detect the vibration frequency and amplitude of the rotor in the magnetic drive 8 using vibration sensor 21 on bearing housing 2. When the vibration frequency or amplitude of the rotor becomes unstable or exhibits periodic abnormal values, it indicates that the rotor may be experiencing cavitation due to leakage, leading to rotor imbalance or misalignment. This indirectly detects leakage within the magnetic pump.

[0028] It should be noted that there are no specific restrictions on periodic outliers here; these need to be determined based on the specifications of the actual magnetic drive 8.

[0029] On the other hand, the coaxiality of the connector 4 between the motor 3 and the magnetic drive 8 is monitored using the first and second detection ends of the coaxiality detector 7, which monitor the first connecting shaft 41 and the second connecting shaft 42, respectively. If the coaxiality does not meet the preset conditions, it indicates that cavitation has occurred in the drive shaft within the magnetic drive 8 or that the internal isolation sleeve has been damaged. Here, the drive shaft is the aforementioned pump shaft. Cavitation causes the drive shaft to become unbalanced, resulting in periodic anomalies in its monitored amplitude. Furthermore, damage to the isolation sleeve leads to an imbalance in weight on the drive shaft, causing periodic fluctuations in the monitored vibration frequency. This indicates a leak within the magnetic pump, potentially leading to damage to the pump shaft or isolation sleeve.

[0030] It should be noted that the aforementioned preset conditions are standard values ​​for the connector 4 under normal operating conditions, and are related to the actual structure or size specifications of the connector 4, and need to be selected according to the conditions. In addition, it is also possible to use one of the connecting axes (i.e., the aforementioned first connecting axis 41 or second connecting axis 42) as a reference and the other connecting axis as the detection axis to determine the coaxiality between the two when detecting the standard value of the coaxiality of the connector 4 or monitoring the coaxiality of the connector 4.

[0031] On another front, temperature monitoring of the bearings and rotor in the magnetic drive 8 is crucial. Using a first infrared detector 5 and a second infrared detector 6 mounted on the base 1, the temperature of the bearings and rotor in the magnetic drive 8 is monitored across the entire horizontal plane. Excessive temperature is a precursor to damage to the seal of the isolation sleeve in the magnetic drive 8, which directly leads to leakage in the magnetic pump. This is because excessively high temperatures in the bearings or rotor cause heat conduction, guiding the high temperature to the isolation sleeve and damaging its sealing structure. This compromised seal allows transported materials from the external pump body to enter the isolation sleeve, leading to cavitation of the isolation sleeve or rotor. Therefore, when the temperature reaches a critical value, the magnetic pump is immediately stopped, and the internal isolation sleeve is inspected to prevent serious leakage. This allows for the prediction of potential leaks within the magnetic pump.

[0032] Specifically, the temperature of the bearings and rotor in the magnetic drive 8 is monitored using a first infrared detection plate 5 and a second infrared detection plate 6 mirrored on both sides of the magnetic drive 8. The infrared temperature sensor can improve the accuracy of temperature detection. The infrared temperature sensor is attached to the arc-shaped mounting surfaces of the first infrared detection plate 5 and the second infrared detection plate 6. This arc-shaped structure serves two purposes: firstly, to accommodate the curved surface structure of the magnetic drive 8, and secondly, to form a circumferential detection ring that fully covers the magnetic drive 8, thereby improving the accuracy of temperature detection.

[0033] In summary, the leakage monitoring device for a toluene delivery magnetic pump provided by this utility model indirectly determines whether there is already a leak or a potential leak within the magnetic pump through temperature monitoring, vibration monitoring, and coaxiality monitoring. This protects the safety of the magnetic pump and the toluene delivery pipeline, while also reducing monitoring costs and improving the general applicability of the magnetic pump monitoring device.

[0034] The above embodiments merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A leakage monitoring device for a toluene delivery magnetic pump, comprising a base (1), a bearing housing (2) for mounting a magnetic drive (8), and a motor (3) mounted on the base (1), characterized in that, The motor (3) is connected to the magnetic drive (8) via a connector (4); a vibration sensor (21) is attached to the bearing seat (2); a first infrared detection plate (5) and a second infrared detection plate (6) with an arc-shaped mounting surface are respectively provided on both sides of the magnetic drive (8); a non-contact temperature sensor is provided in the arc-shaped mounting surface; and a coaxiality detector (7) is provided under the connector (4).

2. The leakage monitoring device for the toluene delivery magnetic pump according to claim 1, characterized in that, The connector (4) is provided with a first connecting shaft (41) and a second connecting shaft (42). The end of the first connecting shaft (41) and the end of the second connecting shaft (42) are connected by a flange or a coupling. The first detection end and the second detection end of the coaxiality detector (7) are respectively located below the first connecting shaft (41) and the second connecting shaft (42). The other end of the first connecting shaft (41) is used to connect with the motor (3).

3. The leakage monitoring device for the toluene delivery magnetic pump according to claim 2, characterized in that, The magnetic drive (8) includes a pump body, an impeller, a pump cover, a pump shaft, a rotor, an isolation sleeve, an inner magnetic cylinder, an outer magnetic cylinder, and a bearing housing. The impeller is connected to the pump shaft and is located in the pump body. The inner magnetic cylinder is sleeved with the outer magnetic cylinder. The isolation sleeve is located between the inner magnetic cylinder and the outer magnetic cylinder and is sealed to the pump cover. The bearing housing is used to connect to the other end of the second connecting shaft (42).

4. The leakage monitoring device for the toluene delivery magnetic pump according to claim 3, characterized in that, The non-contact temperature sensor is an infrared temperature sensor.

5. The leakage monitoring device for the toluene delivery magnetic pump according to claim 1, characterized in that, The first infrared detection plate (5) and the second infrared detection plate (6) are mirror images of each other on the base (1).

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