CN215070904U

CN215070904U - Shield pump block terminal and shield pump

Info

Publication number: CN215070904U
Application number: CN202121120907.3U
Authority: CN
Inventors: 洪占勇; 胡朋; 徐崧; 徐正富; 刘红
Original assignee: Anhui Tianfu Pump Valve Co ltd; Hefei University of Technology
Current assignee: Anhui Tianfu Pump Valve Co ltd; Hefei University of Technology
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-12-07
Anticipated expiration: 2031-05-24

Abstract

The utility model is suitable for a canned motor pump technical field, a canned motor pump block terminal and canned motor pump, canned motor pump block terminal includes: a box body, an installation space is formed inside; a partition plate disposed inside the case body to partition the installation space into a weak current installation cavity and a strong current installation cavity; the cover body is connected with the box body and is used for forming a closed structure for the installation space; the weak current element is installed in the weak current installation cavity, and the strong current element is installed in the strong current installation cavity. The utility model discloses the advantage: simple structure, convenient operation, it is convenient to maintain, has avoided strong and weak electric mutual interference.

Description

Shield pump block terminal and shield pump

Technical Field

The utility model relates to a canned motor pump field especially relates to a canned motor pump block terminal and canned motor pump.

Background

A canned pump is a sealless pump that seals both the pump body and the drive motor within a pressure vessel filled with the pumped medium. The pressure vessel in a canned motor pump is typically only static sealed and therefore has excellent "canned" effectiveness, and is referred to as a canned motor pump. The shield pump uses a wire set to provide a rotating magnetic field and drive the rotor, and the structure eliminates a rotating shaft sealing device of the traditional centrifugal pump, so that the complete leakage-free effect can be achieved.

The strong and weak electricity setting of current canned motor pump, bearing monitor position promptly, wherein: the strong current is the power supply line of the pump, and the weak current is the data line of the bearing monitor, namely the data line of the TRG table. The electromagnetic effect of strong electricity is easy to interfere with weak electricity to cause the phenomena of poor signal and the like.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a shield pump block terminal aims at the forceful electric power weak point mutual interference problem of solving.

The utility model discloses a realize like this, a canned motor pump block terminal, canned motor pump block terminal includes:

a box body, an installation space is formed inside;

a partition plate disposed inside the case body to partition the installation space into a weak current installation cavity and a strong current installation cavity;

the cover body is connected with the box body and is used for forming a closed structure for the installation space;

the weak current element is installed in the weak current installation cavity, and the strong current element is installed in the strong current installation cavity.

Another object of the utility model is to provide a canned motor pump, include:

a canned motor pump body; and the number of the first and second groups,

a canned motor pump block terminal as described above;

the box body is fixedly connected to the shielding pump main body, the weak current element is connected with the monitoring circuit of the shielding pump main body, and the strong current element is connected with the power supply circuit of the shielding pump main body.

The utility model provides a shielding pump distribution box, the cover body is opened, the partition plate is installed inside the box body, and the partition plate divides the installation space into a weak current installation cavity and a strong current installation cavity; and a weak current element is arranged in the weak current installation cavity, and a strong current element is arranged in the strong current installation cavity. The partition plate partitions the weak current element and the strong current element, the cover body is closed, and the cover body is fixed, so that a sealing structure is formed in the box body, the weak current element and the strong current element are protected, the weak current element and the strong current element are prevented from being damaged, strong current leakage is avoided, the safety of the shielding pump is improved, the partition plate is used for partitioning and mounting, the weak current element and the strong current element are prevented from interfering with each other, and the phenomena that signals are poor due to the fact that electromagnetic effect of strong current interferes with weak current are avoided. Meanwhile, the phenomenon of weak point aging caused by strong current heat generation to weak point load is avoided.

The utility model discloses the advantage: simple structure, convenient operation, it is convenient to maintain, has avoided strong and weak electric mutual interference.

Drawings

Fig. 1 is a schematic structural diagram of a self-driven sensing device provided in embodiment 1 of the present invention.

FIG. 2 is a schematic view of the cartridge of the self-driven sensing device of FIG. 1 with the end cap removed.

Fig. 3 is a circuit diagram of the signal processing device of the self-driven sensing device in fig. 1, wherein in order to more clearly display the contents in fig. 3, fig. 3 is divided into two areas, i.e., left and right areas in fig. 4 and 5, which are respectively shown in an enlarged manner.

Fig. 4 is an enlarged schematic diagram of the left region of the circuit diagram in fig. 3.

Fig. 5 is an enlarged schematic diagram of the right area of the circuit diagram of fig. 3.

Fig. 6 is a schematic structural view of a shielding pump isolation sleeve burst protection device provided in embodiment 2 of the present invention.

Fig. 7 is a schematic structural diagram of a detection and control device for shielding axial runout of a main shaft of a pump provided by embodiment 3 of the present invention.

Fig. 8 is a schematic structural diagram of a device for detecting radial runout of a main shaft of a canned motor pump according to embodiment 4 of the present invention.

Fig. 9 is a schematic structural diagram of a detecting member in the radial runout detecting device for the main shaft of the canned motor pump disclosed in fig. 8.

Fig. 10 is a schematic structural diagram of a device for detecting a non-contact bearing wear of a canned motor pump according to embodiment 5 of the present invention.

Fig. 11 is a schematic block diagram of the non-contact bearing wear detection device of the canned motor pump disclosed in fig. 10.

Fig. 12 is a schematic structural diagram of a transmission pipe and a mounting joint part in the non-contact bearing wear detection device of the canned motor pump disclosed in fig. 10.

Fig. 13 is a schematic diagram of a module of the non-contact bearing wear detection device of the canned motor pump disclosed in fig. 10, which is powered by a battery.

Fig. 14 is a schematic structural diagram of a distribution box of a canned motor pump according to embodiment 6 of the present invention.

Fig. 15 is a schematic structural view of a partition board in the distribution box of the canned motor pump disclosed in fig. 14.

Fig. 16 is a schematic structural diagram of a box body in the distribution box of the canned motor pump disclosed in fig. 14.

In the figure: 1. a cylinder body; 2. a piezoelectric sensor; 3. a piston; 4. a connecting rod; 11. a first piston; 12. a top bead; 13. A pressure sensor; 14. a spring; 15. lifting lugs; 16. a support frame; 17. a second piston; 18. a main shaft; 19. a stationary housing; 22. a sleeve; 23. an outer friction block; 24. an inner friction block; 25. a signal processing device; 31. a box body; 32. a fixing device; 33. dividing the plate; 34. a weak current element; 35. a strong electric element; 36. a toggle piece; 37. a cover body; 38. a strong current installation cavity; 39. a weak current mounting cavity; 40. poking the protrusion; 41. a ferroelectric sheet; 42. a weak current sheet; 43. a chute; 44. a strong electric connection piece; 45. a weak current connection sheet;

101. installing a connector; 102. detecting a probe; 103. a conveying pipe; 104. a processing device; 105. an adjustable support; 107. an alarm device; 110. a detection chamber; 111. connecting sleeves; 112. an opening; 121. a resonant induction circuit; 141. a signal generation module; 142. a feedback signal sampling module; 143. a data processing module; 144. a resonant inverter; 145. a battery; 151. mounting a foot; 161. centering the disk sheet; 162. a depth scale.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

Referring to fig. 1, the present embodiment describes a canned motor pump. The canned pump includes a main shaft 18 and a self-driven sensing device that measures the rotational speed of the main shaft 18. The self-driven sensing means comprises a sleeve 22, a friction nano-device and a signal processing means 25.

One end of the main shaft 18 extends into and is suspended in the sleeve 22, and a plurality of groups of nano friction devices for converting the rotating speed of the metal connecting shaft into corresponding electric signals are distributed in the sleeve 22. Each set of nano-friction means comprises at least one outer friction block 23 and at least one inner friction block 24. The outer friction block 23 is fixed in the sleeve 22, and the inner friction block 24 is fixed on the main shaft 18, so that when the main shaft 18 rotates, the inner friction block 24 can be driven to synchronously rotate, and the side surfaces of the inner friction block 24 corresponding to the outer friction block 23 can generate sliding friction and generate an electric signal. In order to stabilize the spindle 18 during rotation, multiple sets of nano-friction devices may be arranged equidistantly in the sleeve 22 in the direction of the spindle 18.

Referring to fig. 2, a plurality of inner friction blocks 24 in each set of nano-friction devices are fixed on the main shaft 18 along a ring shape at equal angles. The shapes of the outer friction block 23 and the inner friction block 24 are not limited, and the outer friction block 23 and the inner friction block 24 can generate corresponding electric signals when sliding friction is met, for example, the outer friction block 23 and the inner friction block 24 can be in a sectional circular truncated cone structure, a sectional cylindrical structure, a strip shape, a disc shape and the like.

Because the length of the main shaft 18 varies with different types of canned pumps, and the application is different, one end of the main shaft 18 does not necessarily extend into the sleeve 22, and therefore in other embodiments, a metal connecting shaft may be added. One end of the metal connecting shaft is coaxially fixed with one end of the main shaft 18, and the fixing manner is not limited, for example, the metal connecting shaft may be fixed to one end of the main shaft 18 by welding, bolting, integral molding, or the like. The metal connecting shaft rotates synchronously with the rotation of the main shaft 18, so that the rotating speed of the metal connecting shaft is the same as that of the main shaft 18, and the rotating speed of the main shaft 18 can be measured by measuring the rotating speed of the metal connecting shaft.

The signal processing device 25 searches a preset electric signal-rotating speed comparison table according to the electric signal, because the rotating speeds of the main shaft 18 are different, the strength of the electric signal generated when the inner friction block 24 and the outer friction block 23 rub is different, a plurality of experiments are carried out in advance, the strength of the generated electric signal is different according to the difference of the rotating speeds, so that an electric signal-rotating speed comparison table can be obtained, the corresponding rotating speed can be calculated according to the strength of the electric signal, and the electric signal-rotating speed comparison table has certain errors but belongs to a reasonable range. The electrical signal generated by the nano friction device can be partially used for supplying power to the signal processing device 25, an external power supply is not needed, the self-driving of the sensing device can be realized, and the cost can be reduced to a certain extent.

Referring to fig. 3, the signal processing device 25 includes an a/D converter, a single chip microcomputer and a nixie tube, wherein the a/D converter is ADC0809, and the single chip microcomputer is AT89C 51.

The processing method of the signal processing device 25 comprises the following steps: step S1, converting the electric signals with different strengths generated by the sliding friction of the inner friction block 24 and the outer friction block 23 into different digital signals through an A/D converter; step S2, transmitting the digital signal to a single chip microcomputer, and analyzing and comparing the digital signal step by the single chip microcomputer according to a preset electric signal-rotating speed comparison table until the rotating speed in accordance with the digital signal range is found; and step S3, controlling the nixie tube to display the rotating speed through the pin of the single chip microcomputer.

Referring to fig. 3 and 4, pins 1, 2, 3, 4, 5, 26, 27 and 28 of the a/D converter are respectively connected to the input signal, and pins 23, 24 and 25 of the a/D converter are respectively connected to

pins

19, 20 and 21.

Pins

10, 7, 17, 14, 15, 8, 18, 19, 20 and 21 of the A/D converter are respectively connected with

pins

30, 12, 8, 7, 6, 5, 4, 3, 2 and 1 of the singlechip. Capacitors C2 and C1 are connected in series between

pins

18 and 19 of the single chip microcomputer, and external crystal oscillator Y1 is connected in parallel at two ends of the capacitors C2 and C1.

Pins

28 and 17 of the single chip microcomputer are respectively connected with the

inputs

2 and 3 of the NOR gate U2A, and the output 1 of the NOR gate U2A is connected with the pin 9 of the A/D converter.

Pins

28 and 16 of the single chip microcomputer are respectively connected with the input terminals 5 and 6 of the NOR gate U2B, and the output terminal 4 of the NOR gate U2B is connected with the

pins

6 and 22 of the A/D converter.

Pins

32, 33, 34, 35, 36, 37, 38 and 39 of the singlechip are respectively connected with

pins

8, 7, 6, 5, 4, 3, 2 and 1 of DS1 of the nixie tube.

Referring to fig. 3 and 5, pins 8, 7, 6, 5, 4, 3, 2 and 1 of a single nixie tube are connected in series with

pins

8, 7, 6, 5, 4, 3, 2 and 1 of another nixie tube, respectively.

Pins

32, 33, 34, 35, 36, 37, 38 and 39 of the single chip microcomputer are respectively connected with one ends of resistors R8, R7, R6, R5, R4, R3, R2 and R1, and the other ends of the resistors R8, R7, R6, R5, R4, R3, R2 and R1 are connected in parallel and then grounded.

Example 2

As shown in fig. 6, the embodiment of the present invention provides a burst protection device for an isolation sleeve of a canned motor pump. The shielding pump isolation sleeve burst protection device is applied to a shielding pump, in the shielding pump, an isolation sleeve is installed in the shielding pump and is arranged between a stator and a rotor, the medium and the rotor are sealed, a dynamic seal is converted into a static seal, the stator winding is prevented from contacting the medium and is used for shielding a process medium, the process medium is guaranteed to be isolated from the atmosphere, the friction force of the stator and the rotor generates abrasion, the isolation sleeve is easily caused, the shielding pump isolation sleeve burst protection device is used for protecting the isolation sleeve in the shielding pump, and the shielding pump isolation sleeve burst protection device is used for protecting the isolation sleeve of the shielding pump. The canned motor pump isolation sleeve burst protection device includes:

and each temperature detection point is correspondingly provided with one temperature detector, the temperature detection points can be positioned on the rotor and/or the stator of the canned motor pump, and each temperature detector is used for detecting the temperature of the corresponding temperature detection point. S2 of the canned motor pump isolation sleeve burst protection method may be performed by a temperature detector. The temperature detector can be arranged on the stator or on the rotor, so that the temperature detector is not limited to a fixed installation mode, and is convenient to install and convenient for position detection and abrasion position positioning of the stator by being arranged on the stator. The temperature detector is arranged on the rotor, so that the rotor can be conveniently detected and positioned at the abrasion position, the temperature detector can be arranged on the stator and the rotor simultaneously, the detection and the abrasion position are conveniently positioned, and the actual installation can be designed according to the actual detection requirement. The temperature detection points are arranged at a plurality of places of a stator or a rotor of the canned motor pump, and the protection temperature difference is input and set through the display part and is selected to ensure that the stator and the rotor are not abraded or are abraded within an acceptable range. The canned motor pump is started, the rotor rotates relative to the stator, when the bearing is worn, friction occurs between the rotor and the stator, the stator friction of a bearing wear end is serious, huge friction temperature is generated at the bearing wear end, the detected temperature is greatly increased, and multipoint temperature detection is carried out on the stator to obtain the detection temperature.

The temperature detection points can also be arranged in two and are arranged at the relative positions of different ends of the stator, for example, one temperature detection head is arranged at the lower part of the inner circle port side of the stator core, and the other temperature detection head is arranged at the upper part of the outer circle port side of the stator core, so that the installation position is arranged, and the temperature difference is detected, and the sensitivity and the accuracy are improved. The worn end and the temperature difference can be determined by detecting the two detection points. Of course, the number of the end portions which are easy to wear can be set according to actual needs, for example, the number of the end portions which are not easy to wear is properly reduced, and the like.

The contactor is in a normally closed state and is connected with the temperature difference controller for controlling the circuit switch of the load electrical appliance. The load appliance is the canned motor pump in embodiment 1, and the circuit switch of the canned motor pump controls the operation of the canned motor pump, so that whether the canned motor pump is operated or not is performed by the contactor.

The display unit is connected to the temperature difference controller for inputting data (e.g. setting the protection temperature difference Δ T)₀) And displaying positioning information (e.g., wear location). The shielding pump isolation sleeve burst protection device further comprises a three-dimensional scene building module, wherein the three-dimensional scene building module is electrically connected with the temperature detector and the display piece and used for positioning the position point of the temperature detector, building a three-dimensional simulation scene of the shielding pump structure and the distribution of the temperature detection points and displaying the three-dimensional simulation scene through the display piece. The three-dimensional simulation scene is constructed as the prior art and is not described herein. The three-dimensional structure of the internal structure of the shield pump is constructed through the three-dimensional scene construction module, and the temperature detection points are distributed in the three-dimensional structure and correspond to the actual position, so that the temperature rise position can be conveniently displayed and positioned. Through a plurality of point temperature detection, can construct three-dimensional structure model through the display, through the temperature monitoring point mark that corresponds the maximum detection temperature, show the wearing and tearing position, location convenient and fast, on the three-dimensional structure who constructs, can carry out the temperature of structure through various colours and show, observe clearly, do not do here and give unnecessary details. When the rotor stops running, the display part displays positioning information, and three-dimensional scene positioning flash frequency positioning is carried out through the display part. Therefore, the worn position can be conveniently found, and the method is convenient and quick to correspond. The display may be a touch screen display or a combination of input keys and a display, which will not be described herein.

A temperature difference controller for detecting the temperature T₁、T₂、……、T_nFinds the highest detected temperature max (T)₁……T_n) And the lowest detection temperature min (T)₁……T_n) Comparison of max (T)₁……T_n) And min (T)₁……T_n) Obtaining the maximum temperature contrast difference delta T (T) inside the canned motor pump as max₁……T_n)-min(T₁……T_n) (ii) a Determination of Delta T₀If the current is larger than the delta T, controlling the contactor to control the normal operation of the shielding pump, and if the current is not larger than the delta T, controlling the contactor to control the normal operation of the shielding pumpThe contactor is controlled to stop the operation of the rotor of the canned motor pump, the canned motor pump is stopped, and max (T)₁……T_n) The corresponding temperature detection point is positioned as a wear position, and the display part is controlled to display the wear position. The temperature difference controller compares the temperature detection signals to obtain a temperature comparison difference value; comparing with the protection temperature difference through the temperature contrast difference, if the protection temperature difference is greater than the temperature contrast difference, the contactor is in a closed state, the shield pump normally operates, if the protection temperature difference is less than or equal to the temperature contrast difference, the contactor is in an off state, the load power supply is disconnected, the rotor stops operating, the shield pump is prevented from being abraded, and therefore the isolation sleeve is prevented from bursting.

Therefore, "control the canned motor pump to normally operate" and "control the canned motor pump to stop the operation" are performed by the contactor. In normal operation, the contactor is in a normally closed state, the circuit is in a closed operating state at the moment, and the shielding pump can normally operate. When the contactor receives the disconnection signal, the contactor is disconnected, the circuit of the shielding pump is disconnected, the rotor of the shielding pump stops running, and the shielding pump stops working.

The embodiment of the utility model provides an in, canned motor pump isolation sleeve pipe burst protection device still including the alarm, indicate through reporting to the police, the alarm can be various devices that can send out the police dispatch newspaper such as bee calling organ, stroboscope, judge when the difference in temperature controller that canned motor pump temperature contrast maximum difference value exceeds the threshold value, then the alarm sends alarm signal, relevant fortune dimension managers can receive relevant fault situation the very first time, overhaul the treatment according to fortune dimension demand to canned motor pump.

Example 3

As shown in fig. 7, for the utility model provides a device is examined and control to canned motor pump main shaft axial float is applied to canned motor pump in

embodiment

1, 2, canned motor pump can include: a shield pump main body and a detection and control device for axial movement of the main shaft 18 of the shield pump;

the device for detecting and controlling the axial movement of the main shaft 18 of the shield pump is connected to the shield pump main body, and the main shaft 18 of the shield pump main body is connected with the device for detecting and controlling the axial movement of the main shaft of the shield pump.

The pressure intensity in the detection and control device for shielding the axial movement of the main shaft of the pump plays a role in inhibiting the axial movement of the main shaft 18, and the axial stability of the main shaft 18 is improved.

In the embodiment of the utility model, the canned motor pump further comprises a fixed casing, the cylinder body 1 is fixedly arranged in the fixed casing, the fixed casing is connected to the canned motor pump main body and is provided with an axial adjusting structure, the distance between the fixed casing and the sensing canned motor pump is adjusted through the adjusting structure, the fixed casing is close to the sensing canned motor pump, and the connecting structure is connected with the main shaft 18 for detection; the fixed shell is far away from the sensing canned motor pump, the connecting structure is separated from the main shaft 18, and the canned motor pump main body is normally used. The fixed shell is connected with the shielding pump main body in an axial sliding mode, and the adjusting structure can be a screw rod, a hydraulic rod, an electric telescopic rod and the like, and the details are omitted.

Axial displacement may occur during rotation of the main shaft 18 of the canned motor pump, causing canned motor pump wear. The device for detecting and controlling the axial movement of the main shaft 18 of the shield pump comprises: piston 3, cylinder body 1, connection structure and sensor.

A cylinder body 1, an axial cavity is formed inside; the piston 3, axially slidably arranged inside the cylinder 1, is of conventional construction for co-operation of the piston and cylinder. The piston 3 and the cylinder 1 constitute a seal structure, and the position inside the cylinder 1 is changed by receiving the axial force of the main shaft 18, thereby changing the pressure inside the cylinder 1. The main shaft 18 pushes and pulls the piston 3 to be nested in the cylinder body 1 in a sliding mode, the sliding direction of the piston 3 is consistent with the axial direction of the main shaft 18, the main shaft 18 rotates to axially move, and axial force is transmitted to the piston 3, so that the relative displacement of the piston 3 and the cylinder body 1 is changed, and a sensor senses signals. The axial runout of the main shaft 18 can be inhibited by the pressure in the cylinder body 1 while measurement is realized, the axial stability of the main shaft 18 is improved, the radial runout can be buffered by the piston 3, and the influence of the radial runout on the axial runout measurement is reduced. The main shaft 18 may be rotatably connected to the piston 3 or the cylinder 1, preferably the piston 3, by a connection structure. The main shaft 18, the piston 3 and the cylinder body 1 can slide relatively on the same straight line or on a parallel line, the cylinder body 1 can be of a barrel-shaped structure, the cross section of the piston 3 is consistent with the inner cross section of the cylinder body 1 and is arranged in a sealing sliding mode, and the piston 3 slides in the cylinder body 1, so that a sealing structure formed by the piston 3 and the cylinder body 1 is ensured, and leakage of the cylinder body 1 and the piston 3 is avoided. The piston 3 slides in the cylinder body 1, and the cylinder body 1 is rigidly arranged, so that a stronger reaction force is exerted on the main shaft 18, the inhibiting effect is improved, and the robustness of the main shaft 18 is improved. Of course, the sealing mechanism does not exclude other structures, such as an air bag, a bellows, etc., and the description is omitted here, but the rigid structure is lost, and the suppression effect is greatly reduced.

Liquid or gas or a combination of liquid and gas is contained in a sealing structure consisting of the cylinder body 1 and the piston 3; the liquid can be hydraulic oil, silicon oil and the like, and the gas can be inert gas, air and the like. When the combination of liquid and gas is used, a certain proportion can be set, and the inhibition capacity and displacement can be adjusted. The pressure sensing sensitivity can be increased through the liquid, and the problems of signal insensitivity, signal delay and the like caused by air volume change are avoided; the shielding pump has the advantages of low manufacturing cost and light weight by using gas to sense pressure. When air is used, the existence of leakage conditions is not considered, meanwhile, the cost is reduced, and pollution is avoided.

The connecting structure is used for connecting the sealing structure with the main shaft 18 and converting the play amount of the main shaft 18 into the displacement of the piston 3 sliding in the cylinder 1; the main shaft 18 of the canned motor pump rotates, and the main shaft 18 can rotate to be connected with the connecting structure, so that the sealing structure can receive the axial force of the main shaft 18, of course, the connecting structure does not need to be connected to the end of the main shaft 18, and can be arranged at other parts of the main shaft 18 as long as the connecting structure can receive the transmission force, and the description is omitted. The connecting structure and the main shaft 18 can rotate and can perform axial force transmission, and the connecting structure can be connected through the connecting rod 4, the universal ball, the bearing, the axis magnetic adsorption and the like, so that the main shaft 18 can rotate relative to the connecting structure and can perform axial force transmission. When the connecting structure is the connecting rod 4, the non-connecting end of the connecting rod 4 is provided with a connecting piece, the connecting rod 4 is rotatably connected with the main shaft 18 of the shielding pump main body through the detachable connecting piece, the connecting piece can be a groove matched with the main shaft 18, when the main shaft 18 is produced, the end part of the main shaft is provided with a margin matched with the groove, and the margin can be nested in the groove, so that the connecting structure can be rotatably connected and axially driven. This allows the axial play of the main shaft 18 of the canned motor pump to be monitored.

A sensor for detecting the pressure inside the sealed chamber; the sensor outputs an electric signal, and the electric signal can be used for table look-up or directly connected with a display part for display, wherein the display part can display quickly. Since the seal structure has a certain effect of suppressing the main shaft 18, the amount of play of the main shaft 18 is reduced, and the signal of the sensor can be displayed after being compensated, or the output signal can be corrected and then a table can be looked up. The sensor can be piezoelectric sensor 2, carries out pressure intensity induction through piezoelectric sensor 2, has increased the sensitivity and the accuracy of response, and piezoelectric sensor 2 frequency band is wide, sensitivity is high, signal-to-noise ratio is high, simple structure, reliable operation and light in weight etc.. The piezoelectric sensor 2 can realize non-contact measurement, and can play a certain role in inhibiting axial movement of the main shaft while realizing real-time measurement, improve stability, reduce abrasion and prolong service life. The pressure intensity sensed by the piezoelectric sensor 2 is changed due to the change of the pressure intensity inside the sealing structure, the piezoelectric sensor 2 senses the pressure intensity inside the cylinder body 1 and converts the pressure intensity into an electric signal, the electric signal is transmitted to the display part by the piezoelectric sensor 2, the electric signal is displayed by the display part and corresponds to the axial movement of the main shaft 18, and therefore the axial movement of the main shaft 18 can be read out through the display part. Of course, a table lookup may be performed by the output electrical signal to read the spindle axial play amount of the spindle 18.

The sensor can also comprise a piezoelectric material, a charge amplifier, a capacitor and a resistor, wherein the piezoelectric material, the capacitor and the resistor are connected in parallel and are connected in series with the charge amplifier, the piezoelectric material senses pressure and converts the pressure into an electric signal, the electric signal is amplified by the charge amplifier, the piezoelectric material, the charge amplifier, the capacitor and the resistor form a pressure measuring circuit, and the circuit is protected by the resistor and the capacitor. Of course, the piezoelectric sensor may be replaced by a piezoresistive sensor or a capacitive sensor, and the spindle play amount is related to a resistance or a capacitance, and the spindle play amount can be known by knowing the resistance or the capacitance, which is not described herein.

The controller, which may include the signal processing device 25 in embodiment 1 and the temperature difference controller in embodiment 2, calculates an axial play amount, i.e., an axial play displacement x, of the spindle from the pressure signal: x ═ dnRT/q; where d is the piezoelectric coefficient of the sensor, n represents the amount of material in the cylinder, T represents the absolute temperature within the cylinder, and R represents the cylinder gas constant. The electric signal is converted into displacement output and represents axial movement amount, the display sensitivity is good, non-contact detection is realized, and sensor abrasion is avoided.

The embodiment of the utility model provides an in, a device is controlled in examining of canned motor pump main shaft axial float can also be provided with the storage piece, carries out data storage through the storage piece, can save historical detection signal, and the controller draws data and shows or can derive the detection curve through the display part from the storage piece is inside to this looks over the axial float undulant. So that the change trend of the play can be observed.

The embodiment of the utility model provides an in, pass through connection structure and main shaft 18's end connection with seal structure, when starting the canned motor pump, main shaft 18 rotates in canned motor pump's inside, pivoted main shaft 18 can produce axial float, thereby cause undulant, 18 axial floats of main shaft make main shaft 18 produce axial fluctuation along the axial, axial undulant promotion seal structure takes place deformation, thereby make the inside pressure of seal structure correspond to change, pressure change in the seal structure gives 18 a reaction force of main shaft simultaneously, reaction force can be effectual the axial fluctuation of suppression main shaft 18, make 18 axial of main shaft tend to stable, install pressure sensor inside the seal structure and sense pressure variation, turn into the signal of telecommunication change with pressure variation, through the signal of telecommunication change sign main shaft 18 axial changes.

Example 4

As shown in fig. 8, the embodiment of the present invention provides a radial runout detection device for a main shaft of a canned motor pump. The same applies to the canned motor pump in embodiments 1 to 3, in which the main shaft 18 of the canned motor pump not only undergoes axial displacement during rotation, but also undergoes radial displacement fluctuation, which causes the main shaft 18 of the canned motor pump to wear at a radial position, and reduces the service life of the canned motor pump. The canned motor pump includes:

a canned motor pump body; and, the radial run-out detection and control device of the main shaft of the said canned motor pump;

the radial runout detection and control device for the main shaft 18 of the canned motor pump is connected to the canned motor pump main body, and the inner end of a detection piece inside the canned motor pump main shaft radial runout detection device is in contact with the main shaft 18. The method comprises the following steps: the radial runout detection and control device for the main shaft 18 of the canned motor pump comprises: a support frame 16, a data processor and a plurality of detection members.

The supporting frame 16 is sleeved on the main shaft 18 and arranged at the periphery of the main shaft 18 to form a supporting structure; braced frame 16 can set up ring structure, certainly also can set up to the annular structure of many arriss, braced frame 16's limit portion can correspond with the quantity of detection piece or for the multiple of detection piece setting number, and the detection piece can be fixed to be set up on braced frame 16's inside wall, and the detection piece can evenly set up on braced frame 16 to can detect the radial driving force of main shaft 18, the combination of being convenient for calculates. Of course, the detection piece can be directly installed on the inner ring of the shielding pump shell, the bearing and the like, and the shell and the bearing play a role of a supporting frame at the moment, so that the effect is equal. The deformation of the spindle 18 in the radial direction can be deformed by the detector and/or the support frame 16. The support frame 16 may be supported by an elastic material and have a restoring deformation force that deforms the support frame 16 and generates a deformation force that restrains the spindle 18 when a radial force is applied to the sensing element. The outer wall of the supporting frame 16 can be circumferentially and fixedly provided with a plurality of fixing pieces, and the supporting frame 16 is fixed through the fixing pieces, so that the fixing stability of the supporting frame 16 is improved, and the fixing pieces can be lifting lugs 15, screw caps, fixing rings and the like, which are not described in detail herein.

And a plurality of detection pieces are arranged, and all the detection pieces are arranged on the side wall of the supporting frame 16 facing the main shaft 18 in an equal-proportion surrounding manner by taking the main shaft 18 as a central shaft. The monitoring point of each detection piece points to the direction of the main shaft 18 and forms a detection plane, the detection plane is a plane vertical to the axis of the main shaft 18 and can be a projection plane of the detection piece, and the direction and the size of radial runout of the main shaft 18 can be conveniently calibrated. And the distances from the monitoring points to the main shaft 18 are equal and do not exceed a preset distance value; the detecting element is used for generating an induction signal due to the touch of the main shaft 18 when the main shaft 18 moves in the radial direction, and the main shaft 18 is restrained from moving in the radial direction through the deformation of the main shaft 18 in the radial direction. The numerical value of the distance value is in direct proportion to the detection precision of the detection and control device. The number of the detection elements is such that the spindle 18 can only touch two of the detection elements during radial runout, thereby forming a first and a second induced signal. The distance value can form the detection sensitivity of the detection piece, when the distance is larger, the detection sensitivity is smaller, when the distance is smaller, the sensitivity is higher, the sensitivity can be set according to the detection requirement, and the set principle is that no abrasion is generated within the distance value, no other adverse effect is generated due to radial play, or the effect and the abrasion are within the acceptable range. Of course, this distance value may be zero, and the detecting member is in contact with the spindle 18, so that the detection can be performed when the radial runout of the spindle 18 is small. The detecting member may be provided at an end portion of the spindle 18, the end portion having a maximum radial runout range, and the reaction force to the spindle 18 by the detecting member is most suppressed, which will not be described herein.

As shown in fig. 9, when the deformation of the detection member is suppressed by the main shaft 18, the detection member may include a fixed housing 19, an elastic member, and the pressure sensor 13. The fixed housing 19 is fixed to the support frame and has a sliding cavity formed therein, and the elastic member is slidably disposed in the sliding cavity. One end of the elastic element is positioned in the sliding cavity, and the other end of the elastic element penetrates through the fixed shell 19 and then is in contact with the main shaft 18. A pressure sensor 13, provided between the elastic member and the fixed housing 19, for detecting a deformation force of the elastic member when the elastic member is compressively deformed. When the main shaft 18 fluctuates, a radial pushing force is generated to push the elastic member to press the pressure sensor 13, and the pressure sensor 13 senses the pressure and converts the pressure into a signal. The main shaft 18 is in radial contact through the elastic piece, the main shaft 18 is clamped through the elasticity of the elastic piece, the clamping device can be suitable for clamping main shafts 18 of various specifications, and the application capability is strong.

The elastic member may include a contact rod, a spring 14, a guide rod, a second piston 17, and a first piston 11. The spring 14 is arranged inside the sliding cavity in a sliding mode, and the guide rod is nested inside the spring 14 and guides the spring 14. The first piston 11 and the second piston 17 are fixedly arranged at two ends of the spring 14 to limit the spring 14. The pressure sensor 13 is uniformly stressed by damping through the friction force of the first piston 11 and the fixed shell 19 and homogenizing the pressure through the second piston 17. The guide bar is connected to a contact bar which is in contact with the spindle 18. The first piston 11 and the second piston 17 may be rubber pads, resin rings, etc., and the spring 14 may also be other elastic structures, such as elastic sheets, metal rings, etc., which are not described herein.

One end of the detection piece in contact with the main shaft 18 can be rotatably provided with a rolling structure, the rotating friction force between the detection piece and the main shaft 18 is reduced through the rolling structure, the friction obstruction is avoided, the rotating resistance of the main shaft 18 is reduced, and the rolling structure can be a top ball 12, a roller and the like, which is not described in detail herein.

The data processor, here the data processor, is the same subject of protection as the controller in embodiment 3, and performs the same function. The data processor and the embodiment herein are configured to receive a first sensing signal and a second sensing signal, and calculate a combined signal c according to the first sensing signal and the second sensing signal, and characterize the magnitude and the direction of the radial run-out of the spindle by the combined signal c: c ═ a + b ═ x + x ', y + y'); wherein, a is a plane vector of the first induction signal on a detection plane, and b is a plane vector of the second induction signal on the detection plane; (x, y) is the plane vector coordinate of a, and (x ', y') is the plane vector coordinate of b.

The embodiment of the utility model provides an in, will detect a circumference setting at the end connection of main shaft 18, when starting the canned motor pump, main shaft 18 rotates in the inside of canned motor pump, pivoted main shaft 18 can produce radial jumping, thereby cause undulant, main shaft 18 radial jumping makes main shaft 18 produce radial thrust, thrust acts on the detection piece, the detection piece detects the thrust in detection piece installation direction, 18 a reaction force of main shaft are given simultaneously to the detection piece, reaction force can be effectual the radial fluctuation of suppression main shaft 18, it tends to stable to make main shaft 18 rotate, main shaft 18 has been avoided producing wearing and tearing. The detection piece senses the radial thrust in the mounting direction and outputs a sensed signal, the combined signal is obtained through combined calculation of the thrust signals in all the mounting directions, the combined signal represents the radial runout degree of the main shaft 18 of the shield pump, and the radial runout degree comprises the size and the direction.

The embodiment of the utility model provides an in, 18 radial runout of main shaft of canned motor pump examine and control device still include the storage piece, carry out data storage and storage history combination signal through the storage piece, derive data and show through the display element and detect the curve through data processor control storage piece to can look over the radial runout trend.

Example 5

This embodiment provides a canned motor pump in which a non-contact bearing wear detection device is installed, which can detect the wear state of the bearing attached to the main shaft 18 of the canned motor pump in embodiments 1 to 4.

As shown in fig. 10, the detection apparatus includes: a mounting adapter 101, a detection probe 102, a transfer tube 103, and a processing device 104.

The mounting connector 101 is used for being detachably and fixedly connected with the tail end of the main shaft 18 of the canned motor pump; the mounting adapter 101 internally contains a cylindrical detection chamber 110; one end of the mounting joint 101 is provided with a connecting sleeve 111 for connecting the tail end of the main shaft 18 of the canned motor pump, the other end is provided with a circular opening 112, the opening 112 is communicated with the detection cavity 110, and the aperture of the opening 112 is smaller than the inner diameter of the detection cavity 110; the mount 101 is made of a magnetically permeable material.

The inspection probe 102 is located within the inspection cavity 110 of the installation joint 101; the size of the detection probe 102 is smaller than the size of the detection cavity 110; the detection probe 102 includes a resonance induction circuit 121 formed of a coil and a capacitor therein.

One end of the transmission pipe 103 is detachably and fixedly connected with the detection probe 102, and the other end is detachably and fixedly connected with a processing device 104; a signal cable for electrically connecting the detection probe 102 and the processing device 104 is provided in the transmission tube 103.

The processing device 104 includes a signal generation module 141, a feedback signal sampling module 142, and a data processing module 143; the signal generating module 141 is configured to output a detection signal to the resonant sensing circuit 121 through a signal cable, so as to excite the resonant sensing circuit 121 to generate an alternating magnetic field around the detection probe 102; the feedback signal sampling module 142 is configured to collect a feedback oscillation signal representing bearing wear received by the detection probe 102; the data processing module 143 is configured to count the feedback oscillation signals acquired by the feedback signal sampling module 142 in unit time, and compare the count value with a critical value representing that the maximum allowable friction occurs in the bearing, so as to obtain an analysis result of the wear condition of the bearing of the shield pump.

The working principle of the detection device in the embodiment is described with reference to fig. 10 and 11, and the working principle of the non-contact bearing wear detection device of the canned motor pump is as follows:

the detection device comprises a movable component and a fixed component. The movable component, namely the mounting connector 101, the mounting connector 101 is connected to the tail end of the main shaft 18 of the canned motor pump, and therefore rotates coaxially with the main shaft 18 of the canned motor pump. The assembly formed by the detection probe 102, the transmission pipe 103 and the processing device 104 is a fixed component; the position of the detection probe 102 in the installation cavity of the installation joint 101 in the combined body can be adjusted, so that the detection probe 102 is exactly located at the center position of the installation cavity in an initial state, the center line of the detection probe 102 and the center axis of the installation joint 101 are located on the same straight line, and the fixed component is fixed on a fixed installation base surface.

In this installed state, there is a uniform gap between the sensing probe 102 and the sensing cavity 110 in the installation joint 101 without contact therebetween. When the canned motor pump is running and the detection device is running, the mounting connector 101 rotates along with the main shaft 18, the signal generator in the processing device 104 inputs an alternating current electric signal to the resonance induction circuit 121 in the detection probe 102, and the resonance induction circuit 121 generates an alternating magnetic field around the detection probe 102 under the excitation of the alternating current electric signal. In this state, the resonant sensing circuit 121 in the sensing probe 102 and the sensing cavity 110 in the mounting adapter 101 constitute a "sensor" for sensing changes in inductance; the resonant frequency of the resonant inductor circuit 121 is the oscillation frequency of the "sensor", and the oscillation frequency is determined by the capacitance and the coil inside the detection probe 102, and the detection cavity 110 of the mounting adapter 101.

The oscillation frequency of the "sensor" can be described by a model of an LC oscillation circuit as follows:

in the above formula, f represents the oscillation frequency of the sensor; l represents the inductance of the sensor; c denotes the capacitance of the sensor, and the capacitance C in the resonant sensing circuit 121 is a fixed capacitance.

In the detection process of the detection device of the embodiment, the canned motor pump is operated. Theoretically, when the bearing is not worn, the main shaft 18 of the canned motor pump rotates without offset according to the original concentricity, and therefore the rotation of the mount joint 101 is also without offset; since the rest of the stator components in the inspection apparatus are also fixed in position, there is no relative displacement between the installation joint 101 and the inspection probe 102. At this time, L and C in the sensor are unchanged.

However, when the bearings of the canned motor pump rub, the position of the rotor assembly changes, and the rotation of the main shaft 18 of the canned motor pump is shifted. The mounting adapter 101 attached to the rear end of the spindle 18 also rotates with the spindle 18.

In the former case, once the amount of wear of the bearings exceeds a threshold, the amount of runout during rotation of the main shaft 18 is excessive; the relative position of the sensing cavity 110 and the sensing probe 102 in the mounting adapter 101 will change continuously; at this time, the inductance L of the "sensor" changes. In the state of bearing wear, the inductance L of the sensor is different when reaching the maximum allowable wear and when not reaching the maximum allowable wear; when the maximum allowable wear is reached, the inductance becomes large.

The feedback signal sampling module 142 in the processing device 104 sets a corresponding oscillation frequency when the maximum allowable bearing wear is reached, and measures a threshold value of the number of pulses per unit time. The oscillation frequency is generally considerably higher when the maximum permissible wear is not reached. Meanwhile, the feedback signal sampling module 142 in the processing device 104 is configured to collect the feedback oscillation signal received by the detection probe 102, in this embodiment, in a unit time, the data processing module 143 in the processing device 104 performs sampling counting on the feedback oscillation signal sent according to the sampling result of the feedback signal sampling module 142; comparing the pulse number obtained in unit time with a pulse number critical value to determine whether the maximum allowable abrasion is caused or not, so as to obtain an evaluation analysis result of the abrasion loss of the bearing; when the number of pulses exceeds a critical value, the bearing abrasion is considered to exceed the maximum allowable abrasion loss, and the maintenance is required.

In this embodiment, the detecting probe 102 further includes a first casing, the first casing is in a circular cake shape, and the resonant sensing circuit 121 is hermetically installed inside the first casing; a first threaded port for connecting the transmission pipe 103 is arranged in the first shell; the first shell is made of a material with low magnetic line damping coefficient, high corrosion resistance and high structural strength.

The first housing functions as a protective cover for the resonant inductive circuit 121 in the test probe 102, and therefore the first housing is typically made of a material that is corrosion resistant and structurally strong. Meanwhile, since the first housing cannot interfere with the magnetic field environment around the resonant induction circuit 121, the material of the first housing is required to have a second magnetic force line damping coefficient. In this embodiment, the first casing is made of a microcrystalline glass material.

In this embodiment, the processing device 104 further includes a second housing; the signal generating module 141, the feedback signal sampling module 142 and the data processing module 143 are located inside the second housing; the side of the second housing is provided with a second threaded port for connecting the transfer tube 103.

The second housing is mainly used as a protective housing for the signal generating module 141, the feedback signal sampling module 142, and the data processing module 143, so that a metal or a polymer material can be selected as needed, and requirements for factors such as heat dissipation performance, impact resistance, corrosion resistance, and production cost of the second housing in an actual application process are comprehensively considered.

In this embodiment, both ends of the transmission pipe 103 are provided with external threads, and both ends of the transmission pipe 103 are detachably connected with the first threaded port and the second threaded port respectively; the inner wall of the transmission pipe 103 is provided with a shielding layer, and the signal cable in the transmission pipe 103 is a shielding cable.

The role of the transfer tube 103 includes two aspects: on the one hand, the processing device 104 and the detection probe 102 are structurally connected, and on the other hand, the signal generation module 141 and the feedback signal sampling module 142 are also containers for installing shielded cables between the resonance induction circuit 121 in the detection probe 102. The shielding layer of the transmission pipe 103 further improves the electromagnetic protection performance of the shielded cable, thereby improving the detection precision of the maintenance device.

In this embodiment, the signal generating module 141 is powered by an ac power source, and the signal generating module 141 filters an electrical signal of the ac power source and converts the filtered electrical signal into an input of the resonant sensing circuit 121. Under the structure, the device for detecting the non-contact bearing wear of the canned motor pump in the embodiment directly adopts alternating current to supply power, and meanwhile, the signal generating module 141 can convert commercial power into a high-frequency alternating current signal to output or directly use the high-frequency alternating current as required.

On the basis, the embodiment is additionally provided with an adjustable bracket 105, and the adjustable bracket 105 is fixedly connected to the processing device 104; the adjustable bracket 105 is used for adjusting and fixing the position of the combination of the processing device 104, the transmission pipe 103 and the detection probe 102, so as to perform centering adjustment on the initial position of the detection probe 102 in the detection cavity 110 of the installation joint 101, and the bottom surface of the adjustable bracket 105 is provided with an installation foot 151 used for being fixedly connected with an installation base surface.

The position of the detection probe 102 in the detection cavity of the mounting connector 101 can be adjusted more conveniently by using the adjustable bracket, so that the detection device is in the best detection state and the most accurate detection result is obtained.

On the basis, as shown in fig. 13, the shield pump non-contact bearing wear detection device of the present example further includes an alarm device 107, and the alarm device 107 receives the analysis result of the data processing module and sends an alarm signal when the analysis result shows that there is excessive bearing wear.

In addition, in the non-contact bearing wear detection device of the canned motor pump of this embodiment, a centering auxiliary device is further disposed at one end of the transmission pipe 103 close to the detection probe 102, and the centering auxiliary device includes a depth scale 162 disposed on the outer wall of the transmission pipe 103, and a centering disc 161 sleeved outside the transmission pipe 103; the outer diameter of the centering disc segment 161 is smaller than the bore diameter of the opening 112 in the field joint 101.

As described in the principle of the detection device of this embodiment 1, the product of this embodiment has strict requirements on the installation conditions of the equipment. When the coaxiality of the detection probe 102 in the detection cavity 110 of the installation connector 101 is poor, the position is not accurate, or the relative displacement is caused by the displacement of the rotating shaft of the unshielded pump in the two, the final detection result is influenced. Therefore, in order to ensure the accuracy during the installation process of the equipment, the present embodiment designs a centering auxiliary device on the transmission pipe 103 as shown in fig. 15.

Generally, the depth of the test probe 102 in the test cavity 110 is maintained by ensuring that the opening 112 of the mounting adapter 101 is located on the same scale of the depth scale 162 during each installation. And then, the centering disc sheet 161 and the circular opening 112 of the mounting joint 101 are ensured to have higher concentricity, so that the detection probe 102 and the detection cavity 110 can keep higher concentricity. This ensures a very high accuracy of the detection result.

The centering disk 161 is not used to block the opening 112 of the adapter 101, but is used to compare with the opening 112 of the adapter 101, and serves as a reference for an operator to see, thereby determining the coaxiality between the two during installation.

Further, the signal generating module 141 can also be powered by a dc power supply, and the processing device 104 further includes a rechargeable battery 145 and a resonant inverter 144; the resonant inverter 144 converts the dc signal generated by the battery 145 into an ac signal, and the signal generating module 141 filters the ac signal and converts the filtered ac signal into an input of the resonant inductor circuit 121.

Example 6

As shown in fig. 14 to 16, a barrier pump distribution box provided in an embodiment of the present invention is mounted on a barrier pump, and can be applied to the barrier pumps of embodiments 1 to 5. The canned motor pump includes:

a canned motor pump body; and the number of the first and second groups,

a canned motor pump block terminal as described above;

the box 31 is fixedly connected to the shield pump body, the weak current element 34 is connected to the monitoring circuit of the shield pump body, and the strong current element 35 is connected to the power supply circuit of the shield pump body.

The canned motor pump block terminal is used for controlling canned motor pump's supply circuit and monitoring circuit, and canned motor pump block terminal includes: case 31, dividing plate 33, and lid 37.

A case 31 having an installation space formed therein; the box body 31 can be a barrel and a quadrangular structure with one open side, the cover body 37 is detachably connected to the open end of the box body 31, the box body 31 can be provided with an exhaust hole so as to exhaust heat generated by the weak current element 34 and the strong current element 35, the box body 31 and the partition plate 33 can be made of plastics, metals or alloys, and the partition plate 33 has a certain function of blocking electromagnetic effect and is not described herein. The method and structure for mounting the weak current element 34 and the strong current element 35 are prior art and will not be described here.

A partition plate 33 provided inside the case 31 and dividing the installation space into a weak current installation cavity 39 and a strong current installation cavity 38; the weak current element 34 is mounted inside the weak current mounting cavity 39, and the strong current element 35 is mounted inside the strong current mounting cavity 38. The partition plate 33 is slidably mounted in the case 31 from the direction of installation of the cover 37, the weak electric element 34 and the strong electric element 35 are respectively mounted on the partition plate 33, the partition plate 33 forms a mounting and supporting structure for the weak electric element 34 and the strong electric element 35, and the partition plate 33 is drawn out to facilitate the mounting, maintenance and repair of the weak electric element 34 and the strong electric element 35, but the partition plate 33 may be fixed by screws, the partition plate 33 may be conveniently provided with a margin in the vertical extending direction, and the margin is fixed by screws, but the mounting, maintenance and repair are inconvenient. The inside of the box 31 may be provided with a sliding groove 43, and the edge of the dividing plate 33 is slidably disposed inside the sliding groove 43, so that the dividing plate 33 is convenient to slide, and the dividing plate 33 is slidably guided, and of course, the dividing plate 33 may be slidably connected in the form of a guide rail, a guide rod, and the like, which is not described herein again.

The partition plate 33 is provided with a weak current plate 42 and a strong current plate 41, the strong current plate 41 is electrically connected with the strong current element 35, the weak current plate 42 is electrically connected with the weak current element 34, a strong current connecting plate 44 and a weak current connecting plate 45 are fixedly connected with corresponding positions in the box body 31, the strong current connecting plate 44 and the weak current connecting plate 45 are connected with a power supply and/or a load, when the partition plate 33 is pushed into the mounting position, the weak current tab 42 is electrically connected to the strong current connection tab 44, the strong current tab 41 is electrically connected to the weak current connection tab 45, thereby realizing the electric connection of the weak current element 34 and the strong current element 35, avoiding the limitation of wires when the partition plate 33 is drawn out, leading the installation and the maintenance to be convenient and fast, of course, the weak electric element 34 and the strong electric element 35 may be connected to a power source and/or a load through electric wires, but the drawing of the partition plate 33 is restricted by the electric wires, which makes the operation difficult.

A cover 37 connected to the case 31 for forming a closed structure with the installation space; one end of lid 37 is rotated and is connected on box body 31, the fixed stirring piece 36 that is provided with towards box body 31 face of the link of lid 37, the one end that cut-off plate 33 is close to lid 37 is fixed to be provided with stirs protrusion 40, when cut-off plate 33 pushed into box body 31 inside, stir protrusion 40 and promote stirring piece 36 and rotate, thereby accomplish lid 37 and close, when lid 37 is closed to certain angle, cut-off plate 33 does not push the space, through pressing lid 37, stirring piece 36 promotes to stir protrusion 40 and continues to slide, stir protrusion 40 and promote cut-off plate 33 and get into the mounted position. The installation of the dividing plate 33 and the cover body 37 forms sequential linkage, so that the dividing plate 33 and the cover body 37 are conveniently and quickly installed, the single operation installation is avoided, the phenomenon that the dividing plate 33 is not pushed in place manually is avoided, and the like. Of course, this structure can also accomplish the pushing in of the dividing plate 33 directly by rotating the lid body 37. Of course, the cover 37 may have other mounting structures, such as being directly fixed by screws or being slidably mounted by rail grooves, which will not be described herein.

The toggle member 36 is of an F-shaped structure, when the dividing plate 33 is pushed into the box 31, the upper part of the toggle protrusion 40 is in non-connection with the toggle member 36 forming a step and enters between the non-connection end and the connection end, and when the dividing plate 33 is pushed in manually and cannot be pushed, the connection end of the toggle member 36 pushes the toggle protrusion 40 to enable the dividing plate 33 to continue to push by rotating the cover body 37. Of course, the toggle member 36 may also be an arc-shaped structure, a U-shaped structure, etc., and the detailed operation is not described herein. When the dividing plate 33 needs to be drawn out, the cover body 37 is rotated reversely, the non-connecting end of the toggle piece 36 pulls the toggle protrusion 40 to slide, and the dividing plate 33 is drawn out.

The position between the partition plate 33 and the box body 31 is fixed through the fixing device 32, so that the partition plate 33 is prevented from shaking in the box body 31, the mounting stability of the partition plate 33 is improved, and the fixing device 32 can be realized in a magnet adsorption mode or a sliding position limiting mode through balls and ball grooves. The magnet adsorption can include two magnets or magnet and iron sheet cooperation, cuts apart on the board 33 and the inside fixedly connected with magnet and/iron sheet respectively of box body 31, accomplishes the absorption when going on to be close to. When fixing device is ball and ball groove, can elastic connection have the ball on the partition plate 33, and the ball groove has been seted up to the box 31 inside that the ball corresponds, gets into the mounted position when partition plate 33, and ball elasticity enters into the ball inslot to carry out the fixed of partition plate 33.

The utility model provides a shield pump block terminal is provided in the above-mentioned embodiment to a shield pump is provided based on this shield pump block terminal, when needs are installed, open lid 37, cut apart board 33 pushes into box body 31 when inside, stir protrusion 40 upper portion and form ladder stir 36 and be close to the end and contact, and go into and be close to the section and keep away from between the end, when cutting apart board 33 manual push-in can not promote, through rotating lid 37, stir 36 keep away from the end and promote and stir protrusion 40 thereby make cut apart board 33 continue to impel. The partition plate 33 is fixed by the fixing device 32 to prevent the partition plate 33 from sliding, the weak current tab 42 is electrically connected to the strong current connection tab 44, and the strong current tab 41 is electrically connected to the weak current connection tab 45, thereby electrically connecting the weak current element 34 and the strong current element 35. When the dividing plate 33 needs to be drawn out for maintenance, the cover 37 is rotated reversely, the toggle piece 36 drives the toggle protrusion 40 to slide reversely, so that the dividing plate 33 is drawn out in an outward sliding manner. The weak current element 34 and the strong current element 35 are protected by the box body 31, so that the weak current element 34 and the strong current element 35 are prevented from being damaged, strong current leakage is avoided, the division plate 33 is used for division and installation, the weak current element 34 and the strong current element 35 are prevented from interfering with each other, and the phenomena that the electromagnetic effect of strong current easily interferes with weak current to cause poor signals and the like are avoided. Meanwhile, the phenomenon of weak point aging caused by strong current heat generation to weak point load is avoided. The installation of the dividing plate 33 and the cover body 37 forms sequential linkage, so that the dividing plate 33 and the cover body 37 are conveniently and quickly installed, the single operation installation is avoided, the phenomenon that the dividing plate 33 is not pushed in place manually is avoided, and the like.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A canned motor pump power distribution box, comprising:

a box body, an installation space is formed inside;

2. The distribution box for the canned motor pump according to claim 1, wherein the partition plate is slidably mounted inside the box body from the direction of the cover, and the weak electric element and the strong electric element are mounted on the partition plate.

3. The distribution box for the canned pump according to claim 2, wherein the box body has a sliding groove therein, and the edge of the partition plate is slidably inserted into the sliding groove.

4. The distribution box for the canned pump according to claim 3, wherein one end of the cover is rotatably connected to the box, a toggle member is fixedly arranged on the connecting end of the cover facing the box, and a toggle protrusion is fixedly arranged on one end of the partition plate close to the cover; wherein, the cover body rotates, and the poking piece pushes the poking protrusion to complete the cutting plate to be pushed in; the cover body is rotated reversely, and the poking piece pulls the poking protrusion to draw out the dividing plate.

5. The distribution box of claim 4, wherein the shifting member is of an F-shaped structure, the dividing plate is pushed into the box body, and the shifting protrusion is in contact with the non-connecting end of the shifting member and enters between the non-connecting end and the connecting end.

6. The distribution box for canned pumps as in claim 3, wherein the partition plate and the box body are fixed in position by fixing means.

7. The distribution box for shield pump of claim 6, wherein said fixing means is a partition plate fixed by means of magnet attraction.

8. The distribution box for canned motor pumps as claimed in claim 6, wherein said fixing means is fixed by a partition plate by means of elastic ball insertion and ball grooves.

9. The distribution box for the canned motor pump as claimed in claim 3, wherein the partition plate is provided with a weak current plate and a strong current plate, the strong current plate is electrically connected to the strong current element, the weak current plate is electrically connected to the weak current element, the strong current plate and the weak current plate are fixedly connected to the corresponding positions inside the box body, the partition plate is pushed to the installation position, the weak current plate is electrically connected to the strong current plate, and the strong current plate is electrically connected to the weak current plate.

10. A canned motor pump, comprising:

a canned motor pump body; and the number of the first and second groups,

a canned motor pump power distribution box according to any one of claims 1 to 9.