Integral junction box protected electromagnetic flowmeter

Abstract

The utility model discloses an integration junction box protection's electromagnetic flowmeter relates to electromagnetic flowmeter technical field, including flowmeter main part, the flowmeter main part top fixed mounting has the protective housing, the flowmeter main part top fixed mounting has the protective housing, the protective housing bottom inwall fixed mounting has the sensor, the protective housing rear side fixed mounting has the apron, the baffle, the baffle fixed mounting is in the middle part inwall of protective housing, the baffle top fixed mounting has the converter shell. The utility model discloses, through with the circuit board welding together with the one end of line, then in the S shape recess of the part of line embedding to the wire arrangement frame, to the line formation reinforcement, make the other end of line when being subjected to the pulling or vibration, avoid the place of circuit board connection place loose, reduced the influence of vibration environment to the terminal of connection, avoid the problem of signal transmission abnormality caused by the line loose.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic flowmeter technology, and in particular to an electromagnetic flowmeter with integrated junction box protection. Background Technology

[0002] An electromagnetic flowmeter is a new type of electromagnetic flow measurement instrument designed based on Faraday's electromagnetic induction theory. When an external magnetic field is applied to the pipeline being measured, the conductive fluid in the pipeline will move along the pipeline direction and cut the magnetic lines of force, thereby outputting an induced voltage on the sensor's detection electrode. After the voltage signal is received by the converter, it will be further amplified, corrected, and converted, and then displayed on the display instrument. The flow rate of the conductive liquid can be calculated using relevant formulas.

[0003] In existing technologies, the wiring of electromagnetic flowmeters involves signal transmission, power supply, and grounding between the sensor (electrodes, excitation coil) and the converter. Negligence in any link will affect the measurement stability and may even lead to equipment failure. Currently, the sensor, converter, and junction box in electromagnetic flowmeters are connected through wiring terminals. This can lead to the vibration being transmitted to the wiring terminals through the cable in scenarios near the pump body or in pipelines with severe vibration (such as reciprocating pump pipelines). This can cause the wiring to loosen, resulting in interruption of the transmission of the induced signal (millivolt-level weak current) or abnormal transmission of the excitation coil power supply signal (strong current), thus causing equipment failure. At the same time, it accelerates the wear of the cable sheath and causes protection failure. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an electromagnetic flowmeter with integrated junction box protection. This solves the problem that in current electromagnetic flowmeters, the sensor, converter, and junction box are connected via wiring terminals. This connection can lead to issues in scenarios near the pump body or in pipelines experiencing severe vibration (such as reciprocating pump pipelines). Vibration can be transmitted through the cable to the wiring terminals, causing loose connections. This can result in interruptions in the transmission of the induction signal (millivolt-level low voltage) or abnormal transmission of the excitation coil power supply signal (high voltage), leading to equipment failure. Furthermore, it accelerates cable sheath wear, causing protection failure.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An electromagnetic flow meter with integrated junction box protection includes a flow meter body, a protective shell fixedly installed on the top of the flow meter body, a sensor fixedly installed on the bottom inner wall of the protective shell, and a cover plate fixedly installed on the rear side of the protective shell.

[0007] A partition is fixedly installed on the inner wall of the middle part of the protective shell. A converter shell is fixedly installed on the top of the partition. A circuit board is fixedly installed on the inner wall of the converter shell, and two circuits are also included.

[0008] A reinforcement assembly, which is mounted on a partition and used to reinforce the wiring;

[0009] A sealing assembly, which is mounted on the protective housing and is used to seal the connection between the cover plate and the protective housing.

[0010] Preferably, the reinforcement component includes:

[0011] A cable management rack is fixedly installed on the rear side of the top of the partition. The middle part of the cable is embedded in the S-shaped groove on the cable management rack. Two waterproof glands are fixedly installed on the outer wall of the rear side of the cover plate. The two cables pass through the two waterproof glands respectively and are interference-fitted with the two waterproof glands.

[0012] Preferably, the sealing assembly includes:

[0013] The mounting base is fixedly installed on the rear inner wall of the protective shell, and a first sealing strip is fixedly installed on the rear side of the mounting base, while a second sealing strip is fixedly installed on the rear side of the cable management rack.

[0014] Preferably, a fixing plate is fixedly installed at the bottom of the partition.

[0015] Preferably, multiple card holders are fixedly installed on one side of the fixing plate.

[0016] Preferably, two sealing sleeves are installed through and fixedly mounted on the top of the partition.

[0017] Preferably, the sensor is connected to the circuit board by wires.

[0018] Preferably, tempered glass is fixedly installed on the inner wall of the front side of the protective shell, and one end of each of the two lines is fixedly connected to the circuit board.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By soldering one end of the wire to the circuit board and then embedding a portion of the wire into the S-shaped groove on the cable management rack, the wire is reinforced. This prevents the other end of the wire from becoming loose at the connection point with the circuit board when subjected to pulling or vibration. By soldering both ends of the wire connecting the circuit board and the sensor, and then securing the wire with the bracket on the fixing plate, the wire is prevented from becoming loose. This reduces the impact of the vibration environment on the terminal block and avoids signal transmission abnormalities caused by loose wires. Attached Figure Description

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the regional structure of the main body of the electromagnetic flowmeter in this utility model;

[0024] Figure 3 This is a schematic diagram of the regional structure of the protective shell in this utility model;

[0025] Figure 4 This is a cross-sectional view of the protective shell in this utility model;

[0026] Figure 5 This is a cross-sectional view of the converter housing in this utility model;

[0027] Figure 6 This is a schematic diagram of the regional structure of the cable management frame in this utility model;

[0028] Figure 7 This is a schematic diagram of the regional structure of the partition plate of this utility model.

[0029] Legend: 1. Flowmeter body; 2. Partition plate; 3. Protective shell; 4. Tempered glass; 5. Sensor; 6. Cover plate; 7. Waterproof gland; 8. Converter shell; 9. First sealing strip; 10. Mounting base; 11. Cable management rack; 12. Second sealing strip; 13. Sealing sleeve; 14. Wiring; 15. Fixing plate; 16. Circuit board; 17. Card slot. Detailed Implementation

[0030] This application embodiment provides an electromagnetic flowmeter with integrated junction box protection, effectively solving the problem that in current electromagnetic flowmeters, the sensor, converter, and junction box are connected via wiring terminals. This can lead to vibrations near the pump body or in scenarios with severe pipeline vibration (such as reciprocating pump pipelines), where the vibration is transmitted to the wiring terminals through the cable, causing the wiring to loosen. This can result in interruption of the transmission of the induction signal (millivolt-level weak current) or abnormal transmission of the excitation coil power supply signal (strong current), leading to equipment failure. It also accelerates the wear of the cable sheath, causing protection failure.

[0031] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the technical solution in this application effectively solves the problem that in current electromagnetic flowmeters, the sensor, converter, and junction box are connected via wiring terminals. This can lead to issues where, in scenarios near the pump body or in pipelines with severe vibration (such as reciprocating pump pipelines), the vibration is transmitted through the cable to the wiring terminals, causing loose connections. This can result in interruptions in the transmission of the induction signal (millivolt-level weak current) or abnormal transmission of the excitation coil power supply signal (strong current), leading to equipment failure. Furthermore, it accelerates cable sheath wear, causing protection failure. The overall approach is as follows:

[0032] To address the problems existing in the prior art, this utility model provides an electromagnetic flowmeter with integrated junction box protection, including a flowmeter body 1, a protective shell 3 fixedly installed on the top of the flowmeter body 1, a sensor 5 fixedly installed on the bottom inner wall of the protective shell 3, and a cover plate 6 fixedly installed on the rear side of the protective shell 3.

[0033] Partition 2 is fixedly installed on the inner wall of the middle part of the protective shell 3. A converter shell 8 is fixedly installed on the top of partition 2. A circuit board 16 is fixedly installed on the inner wall of the converter shell 8, and two lines 14 are also included.

[0034] A reinforcement component is mounted on the partition 2 and is used to reinforce the line 14;

[0035] A sealing assembly is installed on the protective housing 3 and is used to seal the connection between the cover plate 6 and the protective housing 3.

[0036] Furthermore, the reinforcement components include:

[0037] Cable management rack 11 is fixedly installed on the rear side of the top of partition 2. The middle part of the cable 14 is embedded in the S-shaped groove on the cable management rack 11. Two waterproof glands 7 are fixedly installed on the outer wall of the rear side of the cover plate 6. The two cables 14 pass through the two waterproof glands 7 respectively and are interference-fitted with the two waterproof glands 7.

[0038] Furthermore, the sealing assembly includes:

[0039] Mounting base 10 is fixedly installed on the rear inner wall of the protective shell 3. A first sealing strip 9 is fixedly installed on the rear side of the mounting base 10, and a second sealing strip 12 is fixedly installed on the rear side of the cable management rack 11.

[0040] Furthermore, a fixing plate 15 is fixedly installed at the bottom of the partition 2.

[0041] Furthermore, multiple card holders 17 are fixedly installed on one side of the fixing plate 15.

[0042] Furthermore, two sealing sleeves 13 are installed through and fixedly mounted on the top of the partition 2.

[0043] Furthermore, the sensor 5 is connected to the circuit board 16 by wires, and the wires pass through the sealing sleeve 13 and are snapped into multiple card slots 17.

[0044] Furthermore, tempered glass 4 is fixedly installed on the inner wall of the front side of the protective shell 3, the detection end of the sensor 5 passes through and is fixedly connected to the flow meter body 1, and one end of the two lines 14 is fixedly connected to the circuit board 16.

[0045] in:

[0046] Flowmeter body 1: This is the structure for connecting the measuring pipeline in the electromagnetic flowmeter. It has an internal insulating lining, and two grounding terminals are fixedly installed on the top outer wall by bolts. Flanges are on the left and right sides for connecting the measuring pipeline.

[0047] Partition 2: Made of stainless steel plate, it is fixed to the inner wall of the protective shell 3 by bolts and a U-shaped metal bracket. The U-shaped metal bracket is horizontally welded to the inner wall of the protective shell 3. A U-shaped silicone sealing ring is provided at the joint between the U-shaped metal bracket and partition 2 to improve the sealing performance.

[0048] Protective housing 3: It is a stainless steel metal shell, which is fixed to the flow meter body 1 by metal brackets and bolts;

[0049] Tempered glass 4: It is tempered glass with a silicone ring bonded around the edge. A stainless steel plate is set on the back. The stainless steel plate is larger than the tempered glass 4 and presses down on the back of the tempered glass 4. The stainless steel plate is fixed to the protective shell 3 by welding. The edge of the tempered glass 4 is sealed with glass glue.

[0050] Sensor 5: It mainly consists of an excitation coil, a stainless steel housing and electrodes. The excitation coil and electrodes are installed inside the flow meter body 1. The housing is welded to the flow meter body 1. The connection between sensor 5 and protective housing 3 is fixed by welding to improve the sealing performance.

[0051] Cover plate 6: is a stainless steel metal plate, which is fixed to the mounting base 10 by multiple bolts;

[0052] Waterproof gland 7: It is a stainless steel waterproof gland, one end of which is fixed to the cover plate 6 by welding;

[0053] Converter housing 8: It is a box-type stainless steel metal shell, which is fixed to the partition 2 by welding. A stainless steel shell cover is fixed to the rear side by bolts. Two wire holes are opened on the stainless steel shell cover for inserting the wires 14. A display screen is fixed to the front side by a metal bracket and bolts.

[0054] First sealing strip 9: It is a U-shaped silicone sealing ring, which is fixed to the mounting base 10 by adhesive bonding. Its two ends are connected to the two ends of the second sealing strip 12 to improve the sealing performance at the connection between the cover plate 6 and the mounting base 10.

[0055] Mounting base 10: It is a U-shaped stainless steel strip, which is fixed to the protective shell 3 by welding, and is used to fix the cover plate 6.

[0056] Cable management rack 11: It is a U-shaped stainless steel rack, which is fixed to the partition 2 by bolts. A plastic block is glued to the top. Two S-shaped slots are opened on the plastic block to restrict the cable 14. A part of the cable 14 can be embedded into the slots.

[0057] Second sealing strip 12: It is a strip-shaped silicone sealing strip, which is fixed to the cable management frame 11 by adhesive bonding;

[0058] Sealing sleeve 13: is a rubber collar used to seal the connection with partition 2 with hot melt adhesive;

[0059] Line 14: These are the power supply line and the data line, respectively. One end is directly fixed to the circuit board 16 by soldering to prevent loosening.

[0060] Fixed plate 15: It is a stainless steel metal plate, which is fixed to the partition plate 2 by welding. Multiple triangular stiffeners are welded at the connection with the partition plate 2 to improve strength.

[0061] Circuit board 16: This is the circuit board of the converter, which is fixed to the converter housing 8 by a metal bracket and bolts. It is connected to the display screen wires and integrates a signal input and preprocessing module (preamplifier, filter circuit and signal isolation circuit), a signal processing and computing module (analog-to-digital converter, microprocessor and memory), an excitation control module (excitation signal generator, excitation power amplifier and current feedback circuit), an output module (analog output, digital output and digital communication interface) and a power supply module (power adapter, voltage regulator circuit and protection circuit).

[0062] Card holder 17: A C-shaped plastic card holder used to secure the circuit board 16 to the sensor 5, preventing the circuit from becoming loose.

[0063] Working principle:

[0064] The first step involves installing the circuit board 16 inside the converter housing 8, then welding the converter housing 8 inside the protective housing 3. The sensor 5 is then welded to the protective housing 3 to form an integrated electromagnetic flowmeter. Tempered glass 4 is installed, and the connection between the tempered glass 4 and the protective housing 3 is sealed using glass glue and silicone rings to ensure a tight seal. The first sealing strip 9 and the second sealing strip 12 cooperate with the cover plate 6, and then the cover plate 6 is secured with bolts to seal the opening on the rear side of the protective housing 3, ensuring the airtightness of the internal space of the protective housing 3.

[0065] The second step involves soldering one end of the line 14 to the circuit board 16, and then embedding a portion of the line 14 into the S-shaped groove on the cable management rack 11 to reinforce the line 14. This ensures that when the other end of the line 14 is subjected to pulling or vibration, the resistance generated by the S-shaped groove and the line 14 can counteract the pulling force, preventing loosening at the connection point with the circuit board 16. By installing two waterproof glands 7 on the cover plate 6 and then allowing the line 14 to pass through the waterproof glands 7, the inside and outside of the protective shell 3 can be connected by the line 14 while ensuring the sealing.

[0066] The third step is to directly solder the two ends of the line connecting the circuit board 16 and the sensor 5 during the production of the electromagnetic flow meter, and then use the bracket 17 on the fixing plate 15 to clamp and reinforce the line to prevent it from becoming loose.

[0067] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An electromagnetic flowmeter with integrated junction box protection, characterized in that, include: The flow meter body (1) has a protective shell (3) fixedly installed on the top of the flow meter body (1), a sensor (5) fixedly installed on the bottom inner wall of the protective shell (3), and a cover plate (6) fixedly installed on the rear side of the protective shell (3). The partition (2) is fixedly installed on the inner wall of the middle part of the protective shell (3). The top of the partition (2) is fixedly installed with a converter shell (8). The inner wall of the converter shell (8) is fixedly installed with a circuit board (16) and also includes two lines (14). A reinforcement assembly is mounted on the partition (2) and is used to reinforce the line (14); A sealing assembly is mounted on the protective shell (3) and is used to seal the connection between the cover plate (6) and the protective shell (3).

2. The electromagnetic flowmeter with integrated junction box protection as described in claim 1, characterized in that, The reinforcement component includes: a cable management rack (11), which is fixedly installed on the rear side of the top of the partition (2), and the middle part of the cable (14) is embedded in the S-shaped groove on the cable management rack (11). Two waterproof glands (7) are fixedly installed on the outer wall of the rear side of the cover plate (6), and the two cables (14) pass through the two waterproof glands (7) respectively and are interference-fitted with the two waterproof glands (7).

3. The electromagnetic flowmeter with integrated junction box protection as described in claim 2, characterized in that, The sealing assembly includes: a mounting base (10), which is fixedly installed on the rear inner wall of the protective shell (3), a first sealing strip (9) is fixedly installed on the rear side of the mounting base (10), and a second sealing strip (12) is fixedly installed on the rear side of the cable management rack (11).

4. The electromagnetic flowmeter with integrated junction box protection as described in claim 1, characterized in that: A fixing plate (15) is fixedly installed at the bottom of the partition (2).

5. The electromagnetic flowmeter with integrated junction box protection as described in claim 4, characterized in that: Multiple card holders (17) are fixedly installed on one side of the fixing plate (15).

6. The electromagnetic flowmeter with integrated junction box protection as described in claim 1, characterized in that: Two sealing sleeves (13) are fixedly installed through the top of the partition (2).

7. The electromagnetic flowmeter with integrated junction box protection as described in claim 1, characterized in that: The sensor (5) is connected to the circuit board (16) by wires, and the wires pass through the sealing sleeve (13) and are engaged with multiple card holders (17).

8. The electromagnetic flowmeter with integrated junction box protection as described in claim 1, characterized in that: Tempered glass (4) is fixedly installed on the inner wall of the front side of the protective shell (3). The detection end of the sensor (5) passes through and is fixedly connected to the flow meter body (1). One end of the two lines (14) is fixedly connected to the circuit board (16).

Images