Shield pump function monitoring device

Abstract

The invention belongs to the technical field of pump body function detection, and particularly relates to a shield pump function monitoring device which comprises a pump body, a stator cavity is fixedly installed in the pump body, a rotor shaft is arranged in the stator cavity, three groove boxes are symmetrically arranged on the outer wall of the stator cavity, and monitoring assemblies are arranged in the three groove boxes. The three groups of monitoring assemblies are spaced by 120 degrees; the three groove boxes are connected with the outer wall of the stator cavity at intervals of 120 degrees with the center of the rotor shaft as the center point through the balance connection assembly, the three monitoring assemblies can monitor the functions in the pump body, and the balance connection assembly and the self-checking assembly work in a matched mode. On one hand, when the monitoring assembly detects the interior of the shield pump through the detection coil, the detection coil can be more stable, monitoring operation on the function of the shield pump is better facilitated, on the other hand, the balance connection assembly and the self-checking assembly can greatly guarantee the integrity of the detection coil, and the shutdown replacement time can be shortened.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pump body function detection, and particularly relates to a shield pump function monitoring device. BACKGROUND

[0002] The shield pump is a special centrifugal pump without seal and leakage, and the core feature is that the motor rotor is directly and rigidly connected with the pump impeller, and the rotor and the stator are both isolated by a metal shielding sleeve (thin-walled cylinder), so that the risk of medium leakage caused by the seal of the traditional centrifugal pump through the shaft seal is completely eliminated, and the shield pump is particularly suitable for scenarios of conveying flammable, explosive, toxic, corrosive or valuable medium, such as the chemical industry, nuclear power and pharmaceutical industry.

[0003] The function monitoring of the shield pump is the key to guaranteeing the stable operation of the shield pump without leakage, and the core target is to capture the risk precursors such as rotor shaft wear, motor overheating, medium abnormality and structural failure in real time, so as to avoid sudden failure to cause medium leakage, equipment damage or production interruption. The monitoring needs to cover four dimensions of mechanical operation state, motor electrical state, medium conveying state and structural integrity, and the traditional sensor and intelligent technology are combined to realize the control in all working conditions.

[0004] At present, in the prior art, when the function of the shield pump is monitored, the sensor is usually used for detection operation. Since the detection effect of the sensor is relatively single and the sensor is prone to damage, once the sensor of a certain monitoring function is damaged during operation, it is necessary to stop and disassemble the shield pump for replacement, which not only wastes operation time but also is not conducive to the function monitoring of the shield pump.

[0005] Therefore, the application provides a shield pump function monitoring device. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem in the background art.

[0007] The technical scheme adopted by the application to solve the technical problem is that the shield pump function monitoring device comprises a pump body, a stator cavity is fixedly installed in the inside of the pump body, a rotor shaft is arranged in the inside of the stator cavity, three groove boxes are symmetrically arranged on the outer wall of the stator cavity, a monitoring assembly is arranged in the inside of each groove box, the three monitoring assemblies are separated by 120 degrees, the monitoring assembly comprises a detection coil, the monitoring assembly is used for monitoring the internal function of the shield pump through the detection coil, a level rod is fixedly installed on one side of each groove box, a level connecting assembly is arranged in the inside of the level rod, the level connecting assembly is used for stably connecting the groove box and the stator cavity, a self-checking assembly is arranged between the three groove boxes, and the self-checking assembly is used for correcting the position and angle between the three monitoring assemblies when the monitoring assembly monitors the function of the shield pump through the detection coil.

[0008] When it is necessary to monitor the function of the shielding pump, the three grooves are connected with the outer wall of the stator cavity at an interval of 120 degrees with the center of the rotor shaft as the center point by adopting the balance connecting assembly. When the groove installation is completed, the monitoring assembly can be driven to work. The monitoring assembly can monitor the internal function of the shielding pump through the detection coil. The principle is that when the bearing is in good condition, the rotor rotates. The three detection coils symmetrically arranged on the stator cavity at an interval of 120 degrees in space will mutually induct the electromotive force of the rotor rotation to balance each other, so as to monitor the bearing wear and the motor reverse rotation, phase loss, short circuit and the like. When the monitoring assembly monitors the function of the pump body, the self-checking assembly between the three grooves will calibrate the position and angle of the three monitoring assemblies, so as to prevent the position deviation or displacement of the detection coil during work, which affects the monitoring of the internal function of the shielding pump by the detection coil, thereby realizing the monitoring work of the function of the shielding pump. Through the mutual cooperation of the balance connecting assembly and the self-checking assembly, when the monitoring assembly detects the internal shielding pump through the detection coil, the detection coil can be more stable, which is more conducive to the monitoring work of the function of the shielding pump. Moreover, the detection coil can detect the internal function of the shielding pump, which has the characteristics of not being easy to be damaged, can reduce the downtime for replacement, and can monitor multiple functions of the shielding pump at the same time. Compared with the single monitoring characteristic of the sensor, the device can better monitor the shielding pump.

[0009] Preferably, the monitoring assembly further comprises a hollow slot shaft, the number of the detection coil and the hollow slot shaft is two, the two detection coils are wound on the outer wall of the two hollow slot shafts, a connector is fixedly installed between the outer walls of the two detection coils, a wire is fixedly installed on the top of the connector, a verifier is fixedly installed on the outer wall of the pump body, and one end of the wire penetrates through the inner wall of the pump body and is fixedly connected with the outer wall of the verifier. When the monitoring assembly is started, the detection coil on the hollow slot shaft accurately captures the electromotive force generated by the rotation of the rotor. Then the signals are collected through the connector, and the monitoring data is transmitted to the verifier through the wire. Since the three grooves are provided with independent monitoring assemblies and verifiers, the three verifiers will compare and verify the monitoring information received by themselves. By judging whether the three sets of electromotive force data are consistent, the stability of the rotor rotation state is further confirmed, and finally the accurate monitoring of the internal function of the shielding pump is realized, that is, whether the electromotive force of the rotor during rotation is balanced, so as to realize the monitoring work of the internal function of the shielding pump and play the role of monitoring the internal function of the shielding pump.

[0010] Preferably, the outer wall of the slot box is fixedly provided with a hanging rod, the inner groove of the hanging rod can be in close contact with the outer wall of the wire, and when the installation between the slot box and the stator cavity through the connecting assembly is completed, the wire can be hung in the inner part of the hanging rod, so that during the operation of the shielding pump, the wire will not be greatly shaken, displaced or rubbed with the inner wall of the pump body due to vibration, and the wire will always maintain a regular wiring state, and the fixed support of the hanging rod can avoid the loosening of the interface of the wire due to its own gravity or vibration, so as to ensure that the electromotive force signal captured by the detection coil can be stably transmitted to the verifier through the wire, provide protection for the signal comparison and verification of the three monitoring assemblies, indirectly assist in improving the accuracy of the monitoring data, and play a role in hanging the wire.

[0011] Preferably, the connecting assembly comprises four clamping blocks, the four clamping blocks are symmetrically and slidably arranged in the connecting box, the inner wall of the connecting box is fixedly provided with a square block, a pressure spring is arranged between the outer wall of the square block and one side of the four clamping blocks, the inner wall of the stator cavity is provided with a fitting groove, and the outer wall of each of the four clamping blocks can be in close contact with the inner wall of the four slots of the fitting groove. When it is necessary to connect the slot box and the stator cavity, the position of the connecting box on one side of the slot box is corresponded to the position of the fitting groove in the stator cavity, then the connecting box is inserted into the fitting groove by pressing the slot box, the clamping blocks in the connecting box are limited in the connecting box and are pressed to retract the pressure spring, when one side of the balancing rod contacts the inner wall of the fitting groove, the clamping blocks move to the slots in the fitting groove, the clamping blocks are no longer limited, and the pressure spring pushes the clamping blocks to move from the connecting box and clamp into the slots. When the shielding pump starts to operate, the pump body will generate vibration, electromagnetic force and other external forces, the pressure spring can play a role in elastic buffering, when the external force acts on the clamping block, the clamping block will produce a small displacement to the inside of the connecting box, compress the pressure spring, and part of the vibration energy is absorbed through the deformation of the spring; when the external force is weakened, the pressure spring restores the deformation and pushes the clamping block to reset outward, so as to always maintain close contact with the fitting groove, buffer the impact of the external force on the clamping structure, ensure the stability of the clamping through the continuous thrust of the spring, avoid the position deviation of the slot box and the internal monitoring assembly due to vibration, ensure the monitoring accuracy of the detection coil, and play a role in providing a stable installation basis for the installation of the detection coil.

[0012] Preferably, the outer wall of the connecting box and one side of the groove box are fixedly provided with shock isolation plates, the outer wall of the shock isolation plate can be slidably attached to the inner wall of the fitting groove, when the clamping block is ejected under the action of the pressure spring and is clamped and fixed with the fitting groove, at this time, the outer wall of the shock isolation plate and the inner wall of the fitting groove form a close sliding fit, the vibration energy is further consumed by sliding friction, the connection structure is prevented from loosening due to vibration, the installation position of the connecting box and the groove box is assisted and limited, the circumferential deviation phenomenon after clamping is avoided, the stable connection between the clamping block and the stator cavity is achieved, and through the material characteristics of the shock isolation plate, a buffer layer can be formed on the clamping surface, the rigid contact stress between the clamping block and the fitting groove is reduced, the groove box and the stator cavity are in contact, and the contact is more stable.

[0013] Preferably, the inner wall of the groove box is fixedly provided with two circular rods, the inner walls of the two hollow shafts are slidably connected with the outer walls of the two circular rods, the inner walls of the two circular rods are provided with threaded openings, and the outer walls of the two threaded openings are threadedly connected with two screw handles. When the groove box and the stator cavity are installed, the hollow shaft is inserted into the circular rod in the groove box, and when the hollow shaft is inserted, the circular rod is fixed in the groove box by rotating the screw handle and the threaded opening, thereby achieving the installation of the detection coil. The screw handle is continuously pressed to ensure that the hollow shaft does not displace due to vibration of the pump body under the action of the screw thread locking force, and the hollow shaft, the circular rod and the screw handle form a stable integrated structure, providing a stable installation reference for the detection coil wound thereon, avoiding displacement of the detection coil due to vibration, ensuring accurate capture of the monitoring signal, and facilitating subsequent dismounting of the detection coil, ensuring flexibility during installation and achieving the function of installing the detection coil.

[0014] Preferably, the inner wall of the groove box is fixedly provided with a partition plate, the partition plate is arranged between the two circular rods, one side of the partition plate is slidably connected with a clamping rod, the inner wall of the partition plate is slidably connected with an axle block, one end of the clamping rod is arranged in the inner part of the axle block and is rotatably connected with the inner wall of the axle block, a reset spring is arranged between one side of the axle block and the inner wall of the partition plate, and the outer wall of the clamping rod can be clamped with the opening inner wall of the two screw handles. When the screw handle is completely screwed into the threaded opening, the clamping rod is moved by rotating and pulling, the clamping rod operates by pulling the reset spring in the partition plate through the axle block, and then the two ends of the clamping rod are clamped into the openings of the two screw handles. By the elastic reset pulling of the reset spring, the clamping rod can be secondarily reinforced between the two screw handles, preventing the screw handle from being affected by vibration of the pump body and dislocated from the threaded opening, ensuring that the detection coil can be stably installed on the circular rod through the hollow shaft, and achieving the function of reinforcing and connecting the screw handle and the threaded opening.

[0015] Preferably, the self-checking assembly comprises two guide rails symmetrically fixedly installed inside the balance rod, the inner walls of the two guide rails are both slidably connected with an electric sliding block, the outer walls of the two electric sliding blocks are both fixedly installed with an arc-shaped push rod, the outer walls of the two arc-shaped push rods are respectively slidably connected with the inner walls of the two guide rails, and one end of each of the two arc-shaped push rods can abut against the outer wall of the groove box.

[0016] Preferably, a sensing sheet is fixedly installed at the middle position of the inner wall of the balance rod, and the balance rod is an elastic rod; when the balance joint assembly is loose or the groove box is positionally deviated due to external force impact, the deformation of the balance rod will exceed the normal range, at this time, the strain of the sensing sheet will also exceed the threshold value, and the electric signal will be significantly abnormal, at this time, the electric sliding block in the balance rod can be driven to drive the arc-shaped push rod to move towards the groove box to push and correct the position, thereby detecting whether the positions of the three groove boxes are deviated.

[0017] Preferably, a stator is fixedly installed inside the stator cavity, a group of temperature sensors are fixedly installed on the inner wall of the stator cavity, and the group of temperature sensors are arranged outside the stator; a sensing sheet is fixedly installed at the middle position of the inner wall of the balance rod, and the balance rod is an elastic rod; when the stator drives the rotor shaft to rotate, the temperature sensors continuously detect the temperature in the stator cavity, thereby monitoring the motor winding temperature in real time, reflecting the operation of the electric pump, avoiding damage to the motor under abnormal working conditions, and embedding three series-connected PTC normally closed thermal switches in the stator cavity, setting the action temperature to ℃, when the motor winding temperature is overheated, the electric control cabinet will automatically cut off the signal, immediately alarm and automatically stop, which can effectively avoid damage to the motor due to overheating, thereby self-checking to avoid damage to the motor.

[0018] The beneficial effects of the present application are as follows:

[0019] 1. The shielding pump function monitoring device can monitor the functions inside the pump body through the balance joint assembly connecting three groove boxes at an interval of one hundred and twenty degrees with the center of the rotor shaft as the center point and the outer wall of the stator cavity, and the balance joint assembly and the self-checking assembly can cooperate with each other, on the one hand, when the monitoring assembly detects the inside of the shielding pump through the detection coil, the detection coil can be more stable and more conducive to the monitoring operation of the shielding pump function, and on the other hand, the balance joint assembly and the self-checking assembly can greatly ensure the integrity of the detection coil and reduce the downtime for replacement.

[0020] 2. The shielding pump function monitoring device, through the detection coil, the electromotive force generated by the rotation of the rotor is accurately captured, the signals are collected through the connector, and the monitoring data is transmitted to the verifier through the wire. Since the three groove boxes are each equipped with an independent monitoring component and a verifier, the three verifiers will compare and verify the monitoring information received by each other. By judging whether the three groups of electromotive force data are consistent, the stability of the rotor rotation state is further confirmed, that is, whether the electromotive force of the rotor during rotation is balanced, and finally the precise monitoring of the internal function of the shielding pump is realized.

[0021] 3. The shielding pump function monitoring device, by corresponding the position of the connecting box on one side of the groove box to the position of the embedded groove in the stator cavity, then pressing the groove box to insert the connecting box into the embedded groove, the clamping block in the connecting box will be limited in the connecting box and extrude the pressure spring to retract, when one side of the position lever contacts the inner wall of the embedded groove, the clamping block will move to the slot in the embedded groove, the clamping block will lose the limitation, and the pressure spring will push the clamping block to move from the connecting box to clamp into the slot, thereby providing a stable installation basis for the installation of the detection coil.

[0022] 4. The shielding pump function monitoring device, when the clamping of the balance connecting component is loose or the position of the groove box is deviated due to external force impact, the deformation of the position lever will exceed the normal range, at this time the strain of the sensing sheet will also exceed the threshold value, the electric sliding block in the position lever drives the arc-shaped push rod to move in the guide rail, the electric sliding block drives the arc-shaped push rod to push the groove box, so that the position angle between the three groups of groove boxes returns to the symmetrical state, ensuring the balance and symmetry of the position between the three groups of groove boxes, and the self-checking function of pushing the groove box to return is realized.

[0023] 5. The shielding pump function monitoring device, when the clamping block is ejected under the action of the pressure spring and clamped and fixed with the embedded groove, the outer wall of the shock isolation plate and the inner wall of the embedded groove form a close sliding fit state, the sliding friction further consumes vibration energy, avoids loosening of the connecting structure due to vibration, assists in limiting the installation position of the connecting box and the groove box, avoids the circumferential deviation phenomenon after clamping, and through the material characteristics of the shock isolation plate, a buffer layer can be formed on the clamping surface, reducing the rigid contact stress between the clamping block and the embedded groove, so that the groove box is more stable when contacting in the stator cavity. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below with reference to the drawings.

[0025] Figure 1 is the overall view of the application;

[0026] Figure 2 is the main view of the application;

[0027] Figure 3 is the structural schematic diagram of the balance lever in the application;

[0028] Figure 4 is the structural schematic diagram of the detection coil in the application;

[0029] Figure 5 is the structural schematic diagram of the sensing sheet in the application;

[0030] Figure 6 is the structural schematic diagram of the arc-shaped push rod in the application;

[0031] Figure 7 is the structural schematic diagram of the clamping block in the application;

[0032] Figure 8 is the structural schematic diagram of the round rod in the application;

[0033] Figure 9 is the structural schematic diagram of the clamping lever in the application.

[0034] In the figure: 1, pump body; 2, rotor shaft; 3, stator cavity; 301, stator; 302, temperature sensor; 4, verifier; 401, wire; 402, detection coil; 403, connector; 404, suspension rod; 5, balance lever; 501, sensing sheet; 502, guide rail; 503, electric sliding block; 504, arc-shaped push rod; 6, slot box; 7, partition plate; 701, clamping lever; 702, reset spring; 703, shaft block; 8, fitting groove; 9, connecting box; 901, clamping block; 902, pressure bearing spring; 903, square block; 904, shock isolation plate; 10, round rod; 1001, threaded port; 11, screw handle; 12, hollow slot shaft. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, purposes and effects realized by the application easy to understand, the application is further described below in combination with specific embodiments.

[0036] As Figures 1 to 9As shown, the shielding pump function monitoring device comprises a pump body 1, a stator cavity 3 fixedly installed inside the pump body 1, a rotor shaft 2 arranged inside the stator cavity 3, three groove boxes 6 symmetrically arranged on the outer wall of the stator cavity 3, a monitoring assembly arranged inside each of the three groove boxes 6, the three monitoring assemblies being separated by 120 degrees, the monitoring assembly comprising a detection coil 402, the monitoring assembly being configured to monitor the internal function of the shielding pump through the detection coil 402, a level rod 5 fixedly installed on one side of each of the three groove boxes 6, a level connecting assembly arranged inside the level rod 5, the level connecting assembly being configured to stably connect the groove box 6 and the stator cavity 3, a self-checking assembly arranged between the three groove boxes 6, the self-checking assembly being configured to calibrate the position and angle between the three monitoring assemblies when the monitoring assembly monitors the function of the shielding pump through the detection coil 402.

[0037] The detection effect of the sensor is relatively single during detection, and the sensor has the characteristic of being easily damaged. When a certain monitoring function sensor is damaged during operation, it needs to be disassembled and replaced, which wastes operation time and is not conducive to the function monitoring of the shielding pump.

[0038] When the function of the shielding pump needs to be monitored, the three groove boxes 6 are connected to the outer wall of the stator cavity 3 with the center of the rotor shaft 2 as the center point by the level connecting assembly. When the groove box 6 is installed, the monitoring assembly can be driven to work. The monitoring assembly can monitor the internal function of the shielding pump through the detection coil 402. The principle is that when the bearing is in good condition, the rotor rotates, and the three detection coils 402 symmetrically arranged on the stator cavity 3 at a space of 120 degrees will mutually induct the electromotive force of the rotor rotation to balance each other, thereby monitoring the bearing wear and the motor reverse rotation, phase loss, short circuit and the like. When the monitoring assembly monitors the function inside the pump body 1, the self-checking assembly between the three groove boxes 6 will calibrate the position and angle between the three monitoring assemblies, so as to prevent the position deviation or displacement of the detection coil 402 during operation, which affects the monitoring of the internal function of the shielding pump by the detection coil 402, thereby realizing the monitoring operation of the shielding pump function. Through the mutual operation of the level connecting assembly and the self-checking assembly, when the monitoring assembly detects the inside of the shielding pump through the detection coil 402, the detection coil 402 can be more stable, which is more conducive to the monitoring operation of the shielding pump function. Moreover, the detection coil 402 can replace the sensor to detect the inside, which can reduce the downtime for replacement on one hand, and the detection coil 402 can monitor multiple functions inside the shielding pump at the same time, which is better than the single monitoring characteristic of the sensor. The device can monitor the shielding pump.

[0039] As shown in the figure, Figures 2 to 5As shown, the monitoring assembly further comprises hollow slot shafts 12, the number of detection coils 402 and the number of hollow slot shafts 12 are both two, two detection coils 402 are respectively wound on the outer wall of two hollow slot shafts 12, a connector 403 is fixedly installed between the outer walls of the two detection coils 402, a wire 401 is fixedly installed on the top of the connector 403, a verifier 4 is fixedly installed on the outer wall of the pump body 1, one end of the wire 401 penetrates through the inner wall of the pump body 1 and is fixedly connected with the outer wall of the verifier 4;

[0040] When the monitoring assembly is started, the detection coil 402 on the hollow slot shaft 12 accurately captures the electromotive force generated by the rotation of the rotor, then collects the signal through the connector 403, and then transmits the monitoring data to the verifier 4 through the wire 401. Since the three slot boxes 6 are each configured with an independent monitoring assembly and a verifier 4, the three verifiers 4 will compare and verify the monitoring information received by each other, determine whether the three groups of electromotive force data are consistent, further confirm the stability of the rotor rotation state, and finally realize accurate monitoring of the internal function of the shielding pump, that is, determine whether the electromotive force of the rotor is balanced during rotation, thereby realizing the monitoring operation of the internal function of the shielding pump and playing a role in monitoring the internal function of the shielding pump.

[0041] As shown in Figures 5 to 7 The outer wall of the slot box 6 is fixedly installed with a hanging rod 404, and the inner groove of the hanging rod 404 can be in close contact with the outer wall of the wire 401;

[0042] When the slot box 6 is installed between the stator cavity 3 through the connecting assembly, the wire 401 can be hung in the inner part of the hanging rod 404, so that during the operation of the shielding pump, the wire 401 will not be shaken, displaced or rubbed with the inner wall of the pump body 1 due to vibration or stable operation of the monitoring assembly, and will always maintain a regular wiring state. The fixed support of the hanging rod 404 can avoid the loosening of the interface of the wire 401 due to its own gravity or vibration, ensure that the electromotive force signal captured by the detection coil 402 can be stably transmitted to the verifier 4 through the wire 401, provide protection for the signal comparison and verification of the three monitoring assemblies, indirectly assist in improving the accuracy of the monitoring data, and play a role in hanging the wire 401.

[0043] As shown in Figures 5 to 8 The connecting assembly comprises four clamping blocks 901, the four clamping blocks 901 are symmetrically and slidably arranged in the inner part of the connecting box 9, a square block 903 is fixedly installed on the inner wall of the connecting box 9, a pressure spring 902 is arranged between the outer wall of the square block 903 and one side of the four clamping blocks 901, the inner wall of the stator cavity 3 is provided with an embedded groove 8, and the outer walls of the four clamping blocks 901 can be respectively in close contact with the inner walls of the four slot openings of the embedded groove 8;

[0044] When it is necessary to connect the slot box 6 and the stator cavity 3, the position of the connecting box 9 on one side of the slot box 6 is matched with the position of the fitting groove 8 in the stator cavity 3, then the connecting box 9 is inserted into the fitting groove 8 by pressing the slot box 6, the clamping block 901 in the connecting box 9 is limited by the fitting groove 8 to extrude the pressure spring 902 to retract, when one side of the balance lever 5 contacts the inner wall of the fitting groove 8, the clamping block 901 moves to the notch in the fitting groove 8, the clamping block 901 loses the limitation, and the pressure spring 902 pushes the clamping block 901 to move out of the connecting box 9 and clamps into the notch, when the shield pump starts to run, the pump body 1 generates external forces such as vibration and motor electromagnetic force, the pressure spring 902 can play the role of elastic buffering, when the external force acts on the clamping block 901, the clamping block 901 produces a small displacement to the inside of the connecting box 9, compresses the pressure spring 902, and absorbs part of the vibration energy through the deformation of the spring; when the external force weakens, the pressure spring 902 restores the deformation, pushes the clamping block 901 to reset outward, and always maintains the close contact with the fitting groove 8, which not only buffers the impact of the external force on the clamping structure, but also ensures the stability of the clamping through the continuous thrust of the spring, avoids the position deviation of the slot box 6 and the internal monitoring components due to vibration, ensures the monitoring accuracy of the detection coil 402, and plays a role of providing a stable installation basis for the installation of the detection coil 402.

[0045] As shown in Figures 7 to 8 , the outer wall of the connecting box 9 and one side of the slot box 6 are both fixedly installed with shock isolation plates 904, and the outer wall of the shock isolation plate 904 can be slidably attached to the inner wall of the fitting groove 8;

[0046] When the clamping block 901 is ejected and clamped and fixed with the fitting groove 8 under the action of the pressure spring 902, the outer wall of the shock isolation plate 904 and the inner wall of the fitting groove 8 form a close sliding attachment state, the vibration energy is further consumed through sliding friction, the vibration of the connecting structure is avoided, the installation position of the connecting box 9 and the slot box 6 is assisted and limited, the circumferential deviation phenomenon after clamping is avoided, the stable connection between the clamping block 901 and the stator cavity 3 is matched, and through the material characteristics of the shock isolation plate 904, a buffer layer can be formed on the clamping surface, the rigid contact stress between the clamping block 901 and the fitting groove 8 is reduced, the slot box 6 is more stable when contacting in the stator cavity 3, and it should be noted that the shock isolation plate 904 should be made of elastic rubber or damping material.

[0047] As shown in Figures 7 to 8 , the inner wall of the slot box 6 is symmetrically fixedly installed with round rods 10, the inner walls of the two hollow shafts 12 can be slidably connected with the outer walls of the two round rods 10, the inner walls of the two round rods 10 are both provided with threaded openings 1001, and the inner walls of the two threaded openings 1001 are both threadedly connected with screw handles 11;

[0048] When the installation between the slot box 6 and the stator cavity 3 is completed, by inserting the hollow slot shaft 12 into the circular rod 10 in the slot box 6, when the hollow slot shaft 12 is inserted, by screwing between the screw handle 11 and the threaded port 1001, the circular rod 10 will fix the detection coil 402 in the slot box 6 through the hollow slot shaft 12, so as to realize the installation of the detection coil 402, and the screw handle 11 will continuously press to ensure that the hollow slot shaft 12 will not be displaced due to the vibration of the pump body 1 under the action of the threaded locking force, and the hollow slot shaft 12, the circular rod 10 and the screw handle 11 will form a stable integrated structure, which provides a stable installation reference for the detection coil 402 wound thereon, avoids the position deviation of the detection coil 402 caused by vibration, and ensures the accurate capture of the monitoring signal. At the same time, the installation in this way can also facilitate the subsequent dismounting operation of the detection coil 402, ensure the flexibility during installation, and play a role in installing the detection coil 402.

[0049] As shown in Figures 8 to 9 The inner wall of the slot box 6 is fixedly installed with a partition plate 7, the partition plate 7 is arranged between the two circular rods 10, one side of the partition plate 7 is slidably connected with a clamping rod 701, the inner wall of the partition plate 7 is slidably connected with an axle block 703, one end of the clamping rod 701 is arranged in the interior of the rectangular block 903 and can be rotatably connected with the inner wall of the rectangular block 903, a reset spring 702 is arranged between one side of the axle block 703 and the inner wall of the partition plate 7, and the outer wall of the clamping rod 701 can be clamped with the opening inner wall of the two screw handles 11.

[0050] When the screw handle 11 is completely screwed into the threaded port 1001, the clamping rod 701 is moved by rotating and pulling, the clamping rod 701 is operated by pulling the reset spring 702 in the partition plate 7 through the axle block 703, and then the two ends of the clamping rod 701 are clamped into the openings of the two screw handles 11. By the elastic reset pulling of the reset spring 702, the clamping rod 701 can secondarily reinforce between the two screw handles 11, prevent the vibration of the pump body 1 from affecting the screw handle 11, and prevent the screw handle 11 from being dislocated from the threaded port 1001, so as to ensure that the detection coil 402 can be stably installed on the circular rod 10 through the hollow slot shaft 12, and play a role in reinforcing and connecting between the screw handle 11 and the threaded port 1001.

[0051] As shown in Figures 5 to 6 The self-checking assembly includes two guide rails 502, the two guide rails 502 are symmetrically and fixedly installed in the interior of the position rod 5, the interiors of the two guide rails 502 are slidably connected with two electric sliding blocks 503, the outer walls of the two electric sliding blocks 503 are fixedly installed with two arc-shaped push rods 504, the outer walls of the two arc-shaped push rods 504 are slidably connected with the inner walls of the two guide rails 502 respectively, and one end of each of the two arc-shaped push rods 504 can abut against and contact with the outer wall of the slot box 6.

[0052] When the position angle between the three groups of slot boxes 6 deviates, the electric sliding block 503 in the balance lever 5 drives the arc-shaped push rod 504 to move in the guide rail 502, and the electric sliding block 503 drives the arc-shaped push rod 504 to push the slot box 6, so that the position angle between the three groups of slot boxes 6 returns to the symmetrical state, ensuring the balance and symmetry of the positions of the three groups of slot boxes 6, and playing a self-checking role of pushing the slot box 6 to return.

[0053] As shown in Figures 5 to 6 The inner wall of the balance lever 5 is fixedly installed with a sensing sheet 501 at the middle position, and the balance lever 5 is an elastic rod.

[0054] Since the balance lever 5 is an elastic rod, when the balance assembly is clamped and loosened or the slot box 6 is impacted by external force to cause position deviation, the deformation of the balance lever 5 will exceed the normal range, at this time the strain of the sensing sheet 501 will also exceed the threshold value, and the electric signal will be significantly abnormal, at this time the electric sliding block 503 in the balance lever 5 can be driven to drive the arc-shaped push rod 504 to move to the slot box 6 to push and correct the position, and play a role of detecting whether the position deviation occurs between the three groups of slot boxes 6.

[0055] As shown in Figures 2 to 3 The stator cavity 3 is fixedly installed with a stator 301 inside, and a group of temperature sensors 302 are fixedly installed on the inner wall of the stator cavity 3, and the group of temperature sensors 302 are arranged outside the stator 301.

[0056] When the stator 301 drives the rotor shaft 2 to rotate, the temperature sensor 302 continuously detects the temperature in the stator cavity 3, can monitor the motor winding temperature in real time, reflects the operation of the electric pump, avoids damage to the motor under abnormal working conditions, and can pre-bury three groups of PTC normally closed thermal switches inside, the action temperature is set to 150℃, when the motor winding temperature is over-temperature, the electric control cabinet will automatically cut off the signal, immediately alarm and automatically stop, which can effectively avoid the damage of the motor overheating, plays a self-checking role of avoiding damage to the motor, and it should be noted that the temperature sensor 302 can be a PT100 sensor.

[0057] Working principle: when the shielding pump function needs to be monitored, the three grooves 6 are connected with the outer wall of the stator cavity 3 at an interval of 120 degrees with the center of the rotor shaft 2 as the center point by using the balance connecting assembly. When the groove 6 is installed, the monitoring assembly can work. The monitoring assembly can monitor the internal function of the shielding pump through the detection coil 402. The principle is that when the bearing is in good condition, the rotor rotates, and the three detection coils 402 symmetrically arranged on the stator cavity 3 at an interval of 120 degrees in space will mutually induct the electromotive force of the rotor rotation, so as to monitor the bearing wear and motor reverse rotation, open phase, short circuit and other conditions. When the monitoring assembly monitors the function inside the pump body 1, the self-checking assembly between the three grooves 6 will calibrate the position and angle of the three monitoring assemblies, so as to prevent the position deviation or running of the detection coil 402 during operation, which affects the detection of the internal function of the shielding pump by the detection coil 402, so as to realize the monitoring operation of the shielding pump function. Through the mutual operation of the balance connecting assembly and the self-checking assembly, when the monitoring assembly detects the inside of the shielding pump through the detection coil 402, the detection coil 402 can be more stable and more conducive to the monitoring operation of the shielding pump function. Through the detection coil 402 instead of the sensor to detect the inside, on the one hand, the detection coil 402 has the characteristics of not being easy to be damaged, which can reduce the downtime and replacement time. On the other hand, the detection coil 402 can monitor multiple functions inside the shielding pump at the same time. Compared with the single monitoring characteristics of the sensor, the device can better monitor the shielding pump;

[0058] When the monitoring assembly starts, the detection coil 402 on the hollow groove shaft 12 accurately captures the electromotive force generated by the rotor rotation. Then the signal is collected through the connector 403, and then the monitoring data is transmitted to the verifier 4 through the wire 401. Since the three grooves 6 are equipped with independent monitoring assemblies and verifiers 4, the three verifiers 4 will compare and verify the monitoring information received by themselves. By judging whether the three groups of electromotive force data are consistent, the stability of the rotor rotation state is further confirmed, and finally the accurate monitoring of the internal function of the shielding pump is realized, that is, whether the electromotive force of the rotor rotation is balanced, so as to realize the monitoring operation of the internal function of the shielding pump, and play the role of monitoring the internal function of the shielding pump;

[0059] When the groove box 6 is connected with the stator cavity 3 through the connecting assembly, the wire 401 can be hung inside the hanging rod 404, so that the wire 401 does not shake, shift or rub against the inner wall of the pump body 1 due to vibration during the operation of the shielding pump, and always maintains a regular wiring state. The fixed support of the hanging rod 404 can avoid the loosening of the interface of the wire 401 due to its own gravity or vibration, ensure that the electromotive force signal captured by the detection coil 402 can be stably transmitted to the verifier 4 through the wire 401, and provide protection for the signal comparison verification of the three monitoring assemblies. Indirectly assist to improve the accuracy of the monitoring data, and play a role in hanging the wire 401;

[0060] When it is necessary to connect the groove box 6 with the stator cavity 3, the position of the connecting box 9 on one side of the groove box 6 is corresponded with the position of the matching groove 8 in the stator cavity 3, then the connecting box 9 is inserted into the matching groove 8 by pressing the groove box 6, the clamping block 901 in the connecting box 9 is limited in the connecting box 9 and is extruded to retract the compression spring 902, when one side of the balance position rod 5 contacts the inner wall of the matching groove 8, the clamping block 901 moves to the slot in the matching groove 8, the clamping block 901 loses the limitation, and the compression spring 902 pushes the clamping block 901 to move from the connecting box 9 to clamp into the slot. When the shielding pump starts to operate, the pump body 1 generates vibration, electromagnetic force and other external forces, the compression spring 902 can play a role in elastic buffering, when the external force acts on the clamping block 901, the clamping block 901 produces a small displacement to the inside of the connecting box 9, and the compression spring 902 is compressed, and part of the vibration energy is absorbed through the deformation of the spring; when the external force weakens, the compression spring 902 restores the deformation, pushes the clamping block 901 to reset outward, and always maintains the close contact with the matching groove 8, which not only buffers the impact of the external force on the clamping structure, but also ensures the stability of the clamping through the continuous pushing force of the spring, avoids the position deviation of the groove box 6 and the internal monitoring assembly due to vibration, ensures the monitoring accuracy of the detection coil 402, and plays a role in providing a stable installation basis for the installation of the detection coil 402;

[0061] When the clamping block 901 is ejected and clamped and fixed with the matching groove 8 under the action of the compression spring 902, the outer wall of the shock isolation plate 904 and the inner wall of the matching groove 8 form a close sliding fit state, the vibration energy is further consumed through sliding friction, the installation position of the connecting box 9 and the groove box 6 is assisted and limited to avoid the loosening of the connecting structure due to vibration, the circumferential deviation phenomenon after clamping is avoided, the stable connection between the clamping block 901 and the stator cavity 3 is assisted, and a buffer layer can be formed on the clamping surface through the material characteristics of the shock isolation plate 904, the rigid contact stress between the clamping block 901 and the matching groove 8 is reduced, and the groove box 6 is more stable when contacting in the stator cavity 3;

[0062] When the installation between the slot box 6 and the stator cavity 3 is completed, by inserting the hollow slot shaft 12 into the round rod 10 in the slot box 6, when the hollow slot shaft 12 is inserted, by screwing between the screw handle 11 and the threaded port 1001, the round rod 10 will fix the detection coil 402 in the slot box 6 through the hollow slot shaft 12, so as to realize the installation of the detection coil 402, and the screw handle 11 will continuously press to ensure that the hollow slot shaft 12 will not be displaced due to the vibration of the pump body 1 under the action of the threaded locking force, and the hollow slot shaft 12, the round rod 10 and the screw handle 11 will form a stable integrated structure, which provides a stable installation reference for the detection coil 402 wound thereon, avoids the position deviation of the detection coil 402 caused by vibration, and ensures the accurate capture of the monitoring signal. At the same time, the installation in this way can also facilitate the subsequent dismounting operation of the detection coil 402, ensure the flexibility during installation, and play a role in installing the detection coil 402;

[0063] When the screw handle 11 is completely screwed into the threaded port 1001, the clamping rod 701 is moved by rotating and pulling, the clamping rod 701 will work in the baffle 7 by pulling the reset spring 702 through the shaft block 703, and then the two ends of the clamping rod 701 can be clamped into the openings of the two screw handles 11. By the elastic reset pulling of the reset spring 702, the clamping rod 701 will be secondarily reinforced between the two screw handles 11 to prevent the vibration of the pump body 1 from affecting the screw handle 11 and causing dislocation between the screw handle 11 and the threaded port 1001, so as to ensure that the detection coil 402 can be stably installed on the round rod 10 through the hollow slot shaft 12, and play a role in reinforcing and connecting between the screw handle 11 and the threaded port 1001;

[0064] When the position angle between the three groups of slot boxes 6 deviates, the arc-shaped push rod 504 is driven to move in the guide rail 502 by the electric sliding block 503 in the balance rod 5, the arc-shaped push rod 504 is driven by the electric sliding block 503 to push the slot box 6, so that the position angle between the three groups of slot boxes 6 returns to the symmetrical state, ensuring the balance and symmetry of the positions of the three groups of slot boxes 6, and playing a role in self-checking and pushing the slot box 6 to return;

[0065] When the balance connecting assembly is clamped loose or the slot box 6 is deviated due to external force impact, the deformation of the balance rod 5 will exceed the normal range, at this time the strain of the sensing sheet 501 will also exceed the threshold value, and the electric signal will be significantly abnormal, at this time the electric sliding block 503 in the balance rod 5 can be driven to drive the arc-shaped push rod 504 to move towards the slot box 6 to push and correct the position, and play a role in detecting whether the position of the three groups of slot boxes 6 deviates;

[0066] When the stator 301 drives the rotor shaft 2 to rotate, the temperature sensor 302 continuously detects the temperature in the stator cavity 3, can monitor the motor winding temperature in real time, reflects the electric pump operation condition, avoids the motor damage under abnormal working condition, and can internally embed three groups of series PTC normally closed thermal switches, the action temperature is set to 150 DEG C, when the motor winding temperature over-temperature, will automatically cut off the signal to the electrical control cabinet, immediately alarms and automatically stops, can effectively avoid the motor overheating damage, plays the role of self-checking to avoid the motor damage.

[0067] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A shielded pump function monitoring device, characterized by: The utility model provides a shielding pump, including pump body, the inside fixed mounting of pump body has stator cavity, the inside setting of stator cavity has rotor shaft, the outer wall of stator cavity is provided with three slot boxes symmetrically, the inside of three slot boxes all is provided with monitoring assembly, three groups of monitoring assembly are apart by one hundred and twenty degrees, monitoring assembly is used for monitoring the inside function of shielding pump through detection coil, one side of three slot boxes all is fixedly installed with level bar, the inside of level bar is provided with balance joint assembly, balance joint assembly is used for stably connecting between slot box and stator cavity, all be provided with self-checking assembly between three slot boxes, when monitoring assembly is through detection coil and is monitored to the function of shielding pump, self-checking assembly is collated to the position and angle between three groups of monitoring assembly.

2. A shielded pump function monitoring device according to claim 1, characterized in that: The monitoring assembly further includes a hollow slot shaft, the number of the detection coil and the hollow slot shaft is two, two detection coils are wound on the outer wall of two hollow slot shafts, a connector is fixedly installed between the outer walls of the two detection coils, a wire is fixedly installed on the top of the connector, a verifier is fixedly installed on the outer wall of the pump body, and one end of the wire is fixedly connected to the inner wall of the pump body and the outer wall of the verifier.

3. A shielded pump function monitoring device according to claim 2, characterized in that: The outer wall of the slot box is fixedly installed with a hanging rod, and the inner groove of the hanging rod can be in close contact with the outer wall of the wire.

4. A shielded pump function monitoring device according to claim 3, characterized in that: The balance joint assembly includes four clamping blocks, the four clamping blocks are symmetrically and slidably arranged in the connecting box, a square block is fixedly installed on the inner wall of the connecting box, a pressure spring is arranged between the outer wall of the square block and one side of the four clamping blocks, a fitting groove is formed in the inner wall of the stator cavity, and the outer walls of the four clamping blocks can be clamped in the four slot openings of the fitting groove, respectively.

5. A shielded pump function monitoring device according to claim 4, characterized in that: The outer wall of the connecting box and one side of the slot box are fixedly installed with a shock isolation plate, and the outer wall of the shock isolation plate can be slidably attached to the inner wall of the fitting groove.

6. A shielded pump function monitoring device according to claim 5, characterized in that: The inner wall of the slot box is fixedly installed with two circular rods, the inner walls of the two hollow slot shafts are slidably connected to the outer walls of the two circular rods, threaded openings are formed in the inner walls of the two circular rods, and screw handles are threadedly connected to the inner walls of the two threaded openings.

7. A shielded pump function monitoring device according to claim 6, characterized in that: A partition plate is fixedly installed on the inner wall of the slot box, the partition plate is arranged between the two circular rods, a clamping rod is slidably connected to one side of the partition plate, an axle block is slidably connected to the inner wall of the partition plate, one end of the clamping rod is arranged in the square block and can be rotatably connected to the inner wall of the square block, a return spring is arranged between one side of the axle block and the inner wall of the partition plate, and the outer wall of the clamping rod can be clamped to the opening inner wall of the two screw handles.

8. A shielded pump function monitoring device according to claim 7, characterized in that: The self-checking assembly includes two guide rails, the two guide rails are symmetrically and fixedly installed in the inner wall of the level bar, an electric sliding block is slidably connected to the inner wall of each guide rail, an arc-shaped push rod is fixedly installed on the outer wall of each electric sliding block, the outer walls of the two arc-shaped push rods are slidably connected to the inner walls of the two guide rails, and one end of each arc-shaped push rod can be in close contact with the outer wall of the slot box.

9. A shielded pump function monitoring device according to claim 8, characterized in that: A sensing sheet is fixedly installed at the middle position of the inner wall of the level bar, and the level bar is an elastic rod.

10. A shielded pump function monitoring device according to claim 9, characterized in that: A stator is fixedly installed in the inner wall of the stator cavity, and a group of temperature sensors are fixedly installed on the inner wall of the stator cavity and arranged outside the stator.

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