Immersed pump vibration signal conversion device

Abstract

The utility model belongs to the technical field of immersed pumps, and particularly discloses an immersed pump vibration signal conversion device which comprises a vibration signal conversion module. The vibration signal conversion module receives an output signal of the immersed pump vibration signal acquisition module, and the output end of the vibration signal conversion module is connected with the intelligent terminal; the vibration signal conversion module comprises a charge-to-voltage circuit, a voltage amplification circuit and a voltage-to-current circuit which are connected in sequence, the immersed pump vibration signal acquisition module comprises multiple vibration signal acquisition channels, and each vibration signal acquisition channel is provided with a vibration sensor. According to the technical scheme, the vibration signal conversion module is utilized, the equipment size is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible pumps and relates to a vibration signal conversion device for a submersible pump. Background Art

[0002] Liquefied natural gas (LNG) is a very important energy source. Due to its high efficiency, cleanliness and convenience, more and more countries are beginning to use this energy source. In order to effectively transmit LNG, the use of LNG submersible pumps is a necessary step. LNG submersible pumps are equipment used to transport liquefied natural gas from storage tanks to ships or transport vehicles. This type of pump is generally made of stainless steel to prevent corrosion by liquefied natural gas. Its characteristic is that the pump and motor are installed as a whole in a sealed metal container. It usually consists of motors, pump bodies, sensors and other parts.

[0003] When the LNG pump is running, a vibration probe needs to be installed to detect the vibration of the pump. The detection system consists of sensors, cables, cable entry devices and vibration monitors, and a cryogenic accelerometer is used to monitor the operation of the pump.

[0004] In the LNG low-temperature atmospheric pressure storage tank project, two submersible pumps (one for use and one for backup) are generally set up, and each pump is equipped with two vibration probes to detect the vibration of the LNG submersible pump. One of the LNG submersible pumps introduces a set of 1900 / 65 equipment mechanical vibration monitors, which can provide four vibration input signal channels. Each vibration input can be configured through software to support 2-wire and 3-wire acceleration, velocity or displacement sensors, and the output can provide 4 4-20Ma DC standard signal output channels. The 4-20Ma DC standard signal can be transmitted to the upper DCS monitoring system (distributed control system) in the form of hard wiring.

[0005] In the prior art, such as the LNG receiving station cryogenic submersible pump fault monitoring device disclosed in Patent 202311164821.4, the existing 1900 / 65 equipment mechanical vibration monitor still has some disadvantages that are not convenient to use, as follows:

[0006] (1) The space occupied by the 1900 / 65 equipment mechanical vibration monitor is relatively large;

[0007] (2) If a failure occurs, the entire system needs to be replaced or repaired, which results in high repair costs;

[0008] (3) Cannot be installed on rails;

[0009] (4) The power consumption is relatively large. Utility Model Content

[0010] The utility model aims to provide a vibration signal conversion device for a submersible pump, which can reduce the volume of the equipment and lower the cost.

[0011] In order to achieve the above-mentioned object, the basic scheme of the utility model is: a vibration signal conversion device for a submersible pump, comprising a vibration signal conversion module;

[0012] The vibration signal conversion module receives the output signal of the submersible pump vibration signal acquisition module, and the output end of the vibration signal conversion module is connected to the intelligent terminal;

[0013] The vibration signal conversion module includes a charge-to-voltage circuit, a voltage amplification circuit and a voltage-to-current circuit which are connected in sequence.

[0014] The working principle and beneficial effects of this basic solution are: this technical solution uses the vibration signal conversion module to complete the vibration signal conversion operation of the submersible pump, so that the vibration signal conversion module replaces the 1900 / 65 equipment machine. The vibration signal conversion module has a simple structure and can reduce the overall volume of the device. In addition, the vibration signal conversion module does not need to use imported products, which can reduce procurement costs.

[0015] Furthermore, the submersible pump vibration signal acquisition module includes multiple vibration signal acquisition channels, and each vibration signal acquisition channel is provided with a vibration sensor.

[0016] Set up multiple vibration signal collection channels to comprehensively collect the vibration information of the submersible pump and obtain more accurate data.

[0017] Further, the charge-to-voltage circuit includes a first resistor, a second resistor, a capacitor and a first transistor;

[0018] The base of the first transistor is connected to the charge input end of the vibration signal conversion module, the collector of the first transistor is connected to the first resistor, a capacitor is connected in parallel between one end of the first resistor away from the first transistor and the base of the first transistor, and the capacitor is connected in parallel with the second resistor.

[0019] The charge-to-voltage circuit has a simple structure and meets usage requirements.

[0020] Further, the voltage amplification circuit includes a third resistor, a fourth resistor and a second triode;

[0021] The emitter of the second transistor is connected to the positive current of the input voltage, the collector of the second transistor is connected to the negative current of the input voltage through a third resistor, and a fourth resistor is connected in parallel between one end of the third resistor close to the second transistor and the base of the second transistor.

[0022] The voltage amplifier circuit is used to amplify the voltage signal, which is beneficial to signal transmission.

[0023] Further, the voltage-to-current circuit includes a voltage-controlled current source circuit and a current amplification output circuit;

[0024] The input end of the current amplifying output circuit is connected to the input voltage, and the voltage-controlled current source circuit is connected in parallel with the current amplifying output circuit.

[0025] The voltage-to-current circuit converts the amplified voltage signal into a current signal for output.

[0026] Furthermore, it also includes a guide rail, which is arranged on the inner wall of the submersible pump junction box, and the vibration signal conversion module is slidably connected to the guide rail.

[0027] The vibration signal conversion module can move along the slide slot to facilitate position adjustment and connection with the vibration sensor.

[0028] Furthermore, it also includes a power supply module, and a power supply end of the power supply module is connected to the vibration signal conversion module.

[0029] The power supply module is used to ensure power supply to the vibration signal conversion module.

[0030] Furthermore, the size of the vibration signal conversion module is less than or equal to 20 mm in width×100 mm in height×110 mm in depth.

[0031] The vibration signal conversion module is small in size, which greatly saves installation space and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural block diagram of the vibration signal conversion device for a submersible pump of the utility model;

[0033] Figure 2 It is a structural schematic diagram of the vibration signal conversion device of the utility model for a submersible pump;

[0034] Figure 3 It is a charge-to-voltage circuit of the vibration signal conversion device of the utility model for a submersible pump;

[0035] Figure 4 It is a voltage amplifying circuit of the vibration signal conversion device of the utility model for a submersible pump;

[0036] Figure 5 It is a voltage-to-current circuit of the vibration signal conversion device of the utility model for a submersible pump;

[0037] Figure 6 It is a front view structural schematic diagram of the guide rail of the vibration signal conversion device of the submersible pump of the utility model;

[0038] Figure 7 The utility model is a schematic diagram of the side structure of the guide rail of the vibration signal conversion device of the submersible pump. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0042] The utility model discloses a vibration signal conversion device for a submersible pump, which introduces a vibration signal conversion module with one input and one output, and can effectively solve the existing shortcomings such as large space occupied and high maintenance and replacement costs. The vibration signal conversion device for a submersible pump includes a vibration signal conversion module, such as Figure 1 As shown, the vibration signal conversion module receives the output signal of the submersible pump vibration signal acquisition module, and the output end of the vibration signal conversion module is electrically connected to the intelligent terminal, which can be a computer, a mobile phone, etc. In the past, vibration signal conversion of projects often relied on imported products from abroad, which was costly. After the vibration signal conversion module is localized, the procurement cost can be greatly reduced.

[0043] like Figure 2 As shown, terminals 1 and 2 on the vibration signal conversion module are power input terminals; terminal 3 is the ground terminal; terminal 4 is the signal line shielding terminal; terminals 5, 6, and 7 are signal line input terminals; terminals 9 and 10 are 4-20mA output signal terminals, and the power supply current of the vibration signal conversion module is ≤100mA. Each vibration signal set by the LNG submersible pump is connected to the input terminals 5, 6, and 7 of the vibration signal conversion module respectively, and connected to the output terminals 9 and 10 of the vibration signal conversion module through hard wiring, and then led to the upper intelligent terminal for display or participation in the corresponding interlocking.

[0044] The vibration signal conversion module includes a charge-to-voltage circuit, a voltage amplification circuit, and a voltage-to-current circuit (i.e., voltage is converted into a standard signal current) connected in sequence. Preferably, the size of the vibration signal conversion module is less than or equal to 20 mm wide × 100 mm high × 110 mm deep. The vibration signal conversion module is small in size, greatly saving installation space and being easy to use.

[0045] When in use, the vibration signal conversion operation of the submersible pump is completed through the vibration signal conversion module, so that the vibration signal conversion module replaces the 1900 / 65 equipment. The vibration signal conversion module has a simple structure and can reduce the overall volume of the device. In addition, the vibration signal conversion module does not need to use imported products, which can reduce procurement costs.

[0046] In a preferred embodiment of the utility model, the vibration signal acquisition module of the submersible pump includes multiple vibration signal acquisition channels, each of which is provided with a vibration sensor (such as 351B41, etc.). Multiple vibration signal acquisition channels are provided to comprehensively acquire the vibration information of the submersible pump and obtain more accurate data.

[0047] In a preferred embodiment of the present invention, Figure 3 As shown, the charge-to-voltage circuit includes a first resistor (R1), a second resistor (R2), a capacitor (C1) and a first transistor (such as OPA4340, etc.). The base of the first transistor is electrically connected to the charge input end of the vibration signal conversion module, the collector of the first transistor is electrically connected to the first resistor, a capacitor is connected in parallel between one end of the first resistor away from the first transistor and the base of the first transistor, the capacitor is connected in parallel with the second resistor, and the output of the first transistor is 1.248V.

[0048] In a preferred embodiment of the present invention, Figure 4 As shown, the voltage amplifier circuit includes a third resistor (attached Figure 4 R1 in the figure), the fourth resistor (attached Figure 4 The emitter of the second triode is electrically connected to the positive current of the input voltage, the collector of the second triode is electrically connected to the negative current of the input voltage through a third resistor, and a fourth resistor is connected in parallel between one end of the third resistor close to the second triode and the base of the second triode.

[0049] In a preferred embodiment of the present invention, Figure 5 As shown, the voltage-to-current circuit includes a voltage-controlled current source circuit and a current amplification output circuit. The input end of the current amplification output circuit is electrically connected to the input voltage, and the voltage-controlled current source circuit is connected in parallel with the current amplification output circuit. The voltage-to-current circuit converts the amplified voltage signal into a current signal for output.

[0050] In a preferred embodiment of the present invention, Figure 6 and Figure 7 As shown, the vibration signal conversion device for the submersible pump also includes a guide rail, which is arranged on the inner wall of the submersible pump junction box. The guide rail can be directly fixed (such as welding, bonding, riveting, etc.) on the inner wall of the submersible pump junction box, or a groove-type guide rail can be directly arranged on the inner wall of the submersible pump junction box. The vibration signal conversion module is slidably connected to the guide rail, and the vibration signal conversion module can be detachably connected to the guide rail through structures such as a block and a screw. The vibration signal conversion module can move along the slide groove, which is convenient for position adjustment and connection with the vibration sensor, and is easy to install.

[0051] In a preferred embodiment of the utility model, the vibration signal conversion device of the submersible pump further comprises a power supply module, and the power supply end of the power supply module is electrically connected to the vibration signal conversion module. The power supply module is used to ensure power consumption of the vibration signal conversion module. The power supply module can use an external 24V DC power supply to power the vibration signal conversion module.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A submersible pump vibration signal conversion device, characterized in that: including a vibration signal conversion module; The vibration signal conversion module receives the output signal of the submersible pump vibration signal acquisition module, and the output end of the vibration signal conversion module is connected to the intelligent terminal; The vibration signal conversion module includes a charge-to-voltage circuit, a voltage amplification circuit and a voltage-to-current circuit which are connected in sequence.

2. The submersible pump vibration signal conversion device according to claim 1, characterized in that: The submersible pump vibration signal acquisition module includes multiple vibration signal acquisition channels, and each vibration signal acquisition channel is provided with a vibration sensor.

3. The submersible pump vibration signal conversion device according to claim 1, characterized in that: The charge-to-voltage circuit comprises a first resistor, a second resistor, a capacitor and a first transistor; The base of the first transistor is connected to the charge input end of the vibration signal conversion module, the collector of the first transistor is connected to the first resistor, a capacitor is connected in parallel between one end of the first resistor away from the first transistor and the base of the first transistor, and the capacitor is connected in parallel with the second resistor.

4. The submersible pump vibration signal conversion device according to claim 1, characterized in that: The voltage amplification circuit includes a third resistor, a fourth resistor and a second triode; The emitter of the second transistor is connected to the positive current of the input voltage, the collector of the second transistor is connected to the negative current of the input voltage through a third resistor, and a fourth resistor is connected in parallel between one end of the third resistor close to the second transistor and the base of the second transistor.

5. The submersible pump vibration signal conversion device according to claim 1, characterized in that: The voltage-to-current circuit includes a voltage-controlled current source circuit and a current amplification output circuit; The input end of the current amplifying output circuit is connected to the input voltage, and the voltage-controlled current source circuit is connected in parallel with the current amplifying output circuit.

6. The submersible pump vibration signal conversion device according to claim 1, characterized in that: It also includes a guide rail, which is arranged on the inner wall of the submersible pump junction box, and the vibration signal conversion module is slidably connected to the guide rail.

7. The submersible pump vibration signal conversion device according to claim 1, characterized in that: It also includes a power supply module, and a power supply end of the power supply module is connected to the vibration signal conversion module.

8. The submersible pump vibration signal conversion device according to claim 1, characterized in that: The size of the vibration signal conversion module is less than or equal to 20 mm in width×100 mm in height×110 mm in depth.

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