Shield pump single-phase motor silicon controlled rectifier starter module

Abstract

The utility model is suitable for the technical field of motor starters, and provides a shield pump single-phase motor silicon controlled rectifier starter module, which comprises a thyristor starter electrically connected with a shield pump single-phase motor. A starting winding and an operation winding which are connected in parallel are arranged in the shielding pump single-phase motor. The starting winding is connected in series with a power output resistor; the thyristor starter comprises a silicon controlled rectifier, a bimetallic electrostriction blade delay switch and a heating resistance wire; compared with traditional resistor split-phase starting, capacitor starting, centrifugal switch starting and the like, the device has the advantages that the size is smaller, the stability is higher, the starting torque is larger, the device is not limited by temperature, and the starting speed is higher. A single-phase motor of the submerged shield pump is broken through, and the submerged shield pump can be efficiently started and operated without using a capacitor, a centrifugal switch or a PTC (Positive Temperature Coefficient) starter and other devices traditionally.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor starter technical field, more specifically, it relates to a shielding pump single -phase motor thyristor starter module. BACKGROUND

[0002] The drive of ordinary centrifugal pump is through the shaft coupling to connect the impeller shaft of pump and motor shaft, so that the impeller rotates with the motor to work, and the shielding pump is a kind of sealless pump, and the pump and driving motor are sealed in a pressure vessel filled with pumped medium, the pressure vessel only has static seal, and a wire group is used to provide rotating magnetic field and drive rotor, so the rotating shaft sealing device of traditional centrifugal pump is cancelled, so that complete leakage can be achieved.

[0003] Due to the overall sealing problem of the submerged shield pump, the running capacitor and the starting capacitor of the submerged shield pump single-phase motor in the prior art are connected in parallel and then connected with the starting winding, and then directly filled in the stator cavity, when the running capacitor or the starting capacitor is damaged, it means that the submerged shield pump is scrapped as a whole, the running capacitor and the starting capacitor cannot be individually disassembled and replaced, and the service life of the submerged shield pump is reduced, meanwhile, the size of the capacitor is large, and the size of the submerged shield pump single-phase motor also needs to add the size of the capacitor, which increases the occupied space. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a shielding pump single-phase motor thyristor starter module, compared with the traditional resistance phase-splitting starting, capacitor starting, centrifugal switch starting and the like, the volume is smaller, the stability is stronger, the starting torque is larger, and the temperature is not limited, which breaks through the traditional use of capacitor, centrifugal switch or PTC starter and the like for the submerged shield pump single-phase motor, so that the submerged shield pump can achieve efficient starting and running.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A shielding pump single-phase motor thyristor starter module, which comprises a thyristor starter electrically connected with a shielding pump single-phase motor, wherein the power input end of the shielding pump single-phase motor is electrically connected with an L line and an N line respectively, the shielding pump single-phase motor is internally provided with a starting winding and a running winding connected in parallel, the starting winding is connected in series with a power output resistor, the starting winding is connected in series with the thyristor starter, the thyristor starter comprises a thyristor, a bimetallic electrically-induced expansion blade delay switch and a heating resistance wire, the bottom of the thyristor is sequentially provided with a thyristor Gate grid, a thyristor T1 terminal and a thyristor T2 terminal, and the current output resistor is electrically connected with the bimetallic electrically-induced expansion blade delay switch through the heating resistance wire.

[0007] The utility model further sets up: electric connection has respectively with operating winding, starting winding series connection's thermistor on L line, L line and N line are electrically connected through operating winding, L line and N line are electrically connected through thyristor starter.

[0008] The utility model further sets up: the thyristor starter still includes mutually plug -in cooperation's sealing cover and metal sheet metal sleeve, the metal sheet metal sleeve bottom plug -in arrangement has holder, the holder surface is equipped with the first installation cavity group that adapts with thyristor Gate grid, thyristor T1 end and thyristor T2 end with opening.

[0009] The utility model further sets up: the bimetallic electrostrictive blade delay switch includes respectively plug -in setting first plug -in piece, second plug -in piece and thermal expansion contact on the holder, the holder is equipped with the second installation cavity group, third installation cavity group and fourth installation cavity group that adapt with first plug -in piece, second plug -in piece and thermal expansion contact with opening respectively.

[0010] The utility model further sets up: first plug -in piece is first conductive copper galvanized connection piece, second plug -in piece is by mutually fixed connection's second conductive copper galvanized connection piece, bimetallic static contact and is composed, thermal expansion contact has third conductive copper galvanized connection piece, bimetallic dynamic contact and is composed.

[0011] The utility model further sets up: the sealing cover outer circumferential side is fixed with a plurality of rubber handles and is distributed in circumferential array, the sealing cover outer circumferential side is equipped with the first annular sealing groove with opening near its bottom, the metal sheet metal sleeve outer circumferential side is equipped with the second annular sealing groove with opening, the metal sheet metal sleeve is sheathed with the elastic rubber ring, the elastic rubber ring inner circumferential side is set from top to bottom with two sets of annular rubber sealing ribs that adapt with first annular sealing groove, second annular sealing groove respectively, the elastic rubber ring outer circumferential side and rubber handle outer circumferential side all are equipped with a plurality of antiskid lines with opening.

[0012] The utility model further sets up: the metal sheet metal sleeve outer circumferential side is fixed with sleeve near its bottom symmetry, the holder is of plastics material, and its outer circumferential side is fixed with the U-shaped seat of hollow structure setting symmetry, the U-shaped seat inner wall is fixed with ear lever, the ear lever is slidably provided with the plug -in portion of sleeve inner wall plug -in cooperation.

[0013] The utility model further sets up: the sleeve inner wall is equipped with the slot with opening, the plug -in portion includes the support plate of sleeve inner wall sliding cooperation, the support plate side is equipped with the guide hole of ear lever sliding cooperation with opening, the support plate is fixedly connected with the extrusion spring of ear lever on the U-shaped seat inner wall and is sheathed, the support plate side is fixed with the plug -in block of slot plug -in cooperation near its top, the support plate side is fixed with curved surface board.

[0014] The utility model discloses the advantages are:

[0015] 1, the starter module of the utility model compares traditional resistance split-phase starting, capacitor starting, centrifugal switch and so on starting, the volume is smaller, the stability is stronger, and the starting torque is bigger, is not restricted by temperature, breaks the traditional capacitor, centrifugal switch or PTC starter and so on devices also can make the liquid under the shield pump reach the efficient starting and operation of single-phase motor.

[0016] 2, the utility model thyristor starter volume is smaller than traditional capacitor volume, can be installed outwardly sealed, just need to use hand and can easily plug in and plug out, convenient maintenance replacement, under the condition that the liquid under shield pump performance is identical, the liquid under shield pump overall size can also be greatly compressed, reduced the occupied space, through the setting of elastic rubber ring, improved the stability and sealing property of sealing cover and metal sheet metal sleeve connection, through the setting of the plug-in part, improved the stability of metal sheet metal sleeve and retainer connection. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a shield pump single-phase motor silicon controlled rectifier starter module circuit control graph for the utility model.

[0018] Figure 2 It is a shield pump single-phase motor silicon controlled rectifier starter module circuit control graph for the utility model. Figure 1 Partial close-up.

[0019] Figure 3 It is the structure schematic drawing of thyristor starter for the utility model.

[0020] Figure 4 It is the explosion structure schematic drawing of thyristor starter for the utility model.

[0021] Figure 5 It is the structure schematic drawing of sealing cover for the utility model.

[0022] Figure 6 It is the structure schematic drawing of metal sheet metal sleeve for the utility model.

[0023] Figure 7 It is the structure schematic drawing of retainer for the utility model.

[0024] Figure 8 It is the structure schematic drawing of elastic rubber ring for the utility model.

[0025] Figure 9 It is the explosion structure schematic drawing of silicon controlled rectifier, bimetallic electrostrictive vane time delay switch and retainer assembly for the utility model.

[0026] In the figure: 1, thyristor starter; 2, silicon controlled rectifier; 3, thyristor Gate gate; 4, thyristor T1 end; 5, thyristor T2 end; 6, sealing cover; 7, metal sheet metal sleeve; 8, retainer; 9, first mounting cavity group; 10, second mounting cavity group; 11, third mounting cavity group; 12, fourth mounting cavity group; 13, second conductive copper galvanized connecting piece; 14, bimetallic static contact; 15, third conductive copper galvanized connecting piece; 16, bimetallic dynamic contact; 17, rubber handle; 18, second annular sealing groove; 19, elastic rubber ring; 20, first annular sealing groove; 21, shape rubber sealing rib; 22, anti-skid pattern; 23, sleeve; 24, U-shaped seat; 25, ear lever; 26, plug-in part; 27, insertion slot; 28, support plate; 29, guide hole; 30, extrusion spring; 31, plug; 32, first conductive copper galvanized connecting piece; 33, curved surface plate. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0029] In the present application, unless otherwise stated, the directions used such as "up, down" are generally with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "left, right" is generally with respect to the left and right shown in the drawings; "inner, outer" refers to the inner and outer of the contour of each component itself, but the above directional words are not used to limit the present application.

[0030] Example one, please refer to Figures 1-9 The present application provides the following technical solutions:

[0031] A shielding pump single-phase motor silicon controlled rectifier starter module, specifically, including a thyristor starter 1 electrically connected with a shielding pump single-phase motor; the shielding pump single-phase motor power input end is respectively electrically connected with an L line and an N line; the shielding pump single-phase motor is internally provided with a starting winding and a running winding connected in parallel with each other; the starting winding is connected in series with a power output resistor; the starting winding is connected in series with the thyristor starter 1; the thyristor starter 1 includes a silicon controlled rectifier 2, a bimetallic electrostrictive blade delay switch and a heating resistance wire; the silicon controlled rectifier 2 bottom is sequentially provided with a thyristor Gate gate 3, a thyristor T1 end 4 and a thyristor T2 end 5; the current output resistor and the bimetallic electrostrictive blade delay switch are electrically connected through the heating resistance wire.

[0032] The L line is electrically connected with a thermistor connected in series with the running winding and the starting winding respectively; the L line is electrically connected with the N line through the running winding; the L line and the N line are electrically connected through the thyristor starter 1; the thyristor starter 1 further comprises a sealing cover 6 and a metal sheet sleeve 7 which are inserted and matched with each other; the metal sheet sleeve 7 is provided at the bottom with a retainer 8; the surface of the retainer 8 is provided with a first installation cavity group 9 matched with the thyristor Gate grid 3, the thyristor T1 end 4 and the thyristor T2 end 5; the bimetallic electrostrictive blade delay switch comprises a first insertion piece, a second insertion piece and a thermal expansion contact which are respectively inserted on the retainer 8; the retainer 8 is respectively provided with a second installation cavity group 10, a third installation cavity group 11 and a fourth installation cavity group 12 matched with the first insertion piece, the second insertion piece and the thermal expansion contact; the first insertion piece is a first conductive copper galvanized connecting piece 32; the second insertion piece is composed of a second conductive copper galvanized connecting piece 13 and a bimetallic static contact 14 which are fixedly connected with each other; the thermal expansion contact is composed of a third conductive copper galvanized connecting piece 15 and a bimetallic dynamic contact 16.

[0033] The working principle of the embodiment is as follows:

[0034] The shielding pump single-phase motor winding of the present application has an additional phase current output winding compared with the ordinary motor winding, which is used to heat the bimetallic electrostrictive blade delay switch in the thyristor starter 1 to maintain the state. When running normally, the output voltage is approximately 1Vrms and the output current is 1.5A. When the motor winding is powered on, the thyristor Gate grid 3 in the starter is connected to the thyristor T2 end 5 through the normally closed contact of the bimetallic electrostrictive blade delay switch, and the thyristor T2 end 5 and the thyristor T1 end 4 are in a conducting state. The starting winding is powered on, and the current flows through the starting winding. The current flows from the thyristor T2 end 5 to the thyristor T1 end 4 and then to the power supply to form a current loop. The shielding pump single-phase motor starts to rotate. Since there is current flowing through the starting winding, the starting current of the shielding pump single-phase motor is very large. At the same time, the current output winding inside the shielding pump single-phase motor is powered on to the two electrodes of the bimetallic electrostrictive blade in the thyristor starter 1. The large current causes the temperature of the bimetallic dynamic contact 16 to continuously rise. After about 0.5s, the temperature on the bimetallic dynamic contact 16 reaches 70℃. At this time, the normally closed contact of the bimetallic electrostrictive blade delay switch slowly breaks, and the temperature on the bimetallic blade is maintained at 70℃. The thyristor Gate grid 3 is powered off, and the thyristor T2 segment 5 and the thyristor T1 end 4 are cut off. The starting winding is not powered on. At this time, the start of the submersible shielding pump single-phase motor is completed, and the shielding pump single-phase motor is in a normal running state.

[0035] In summary, due to the overall sealing problem of the submersible canned pump, the capacitor of the single-phase motor of the submersible canned pump is directly filled in the stator cavity in the past. When the capacitor is damaged, it means that the submersible canned pump is scrapped as a whole. The capacitor cannot be individually disassembled and replaced. The volume of the thyristor starter module of the present application is smaller than that of the traditional capacitor. The thyristor starter module can be installed externally and sealed. The plug-in structure design is convenient for maintenance and replacement. In the case of consistent performance of the submersible canned pump, the overall size of the submersible canned pump can be greatly compressed.

[0036] Embodiment two, please refer to Figures 1-9 , this embodiment two is improved on the basis of embodiment one, specifically, the outer peripheral side of the sealing cover 6 is fixed with a plurality of rubber handles 17 in a circumferential array; the outer peripheral side of the sealing cover 6 is provided with a first annular sealing groove 20 close to the bottom thereof; the outer peripheral side of the metal sheet sleeve 7 is provided with a second annular sealing groove 18; the metal sheet sleeve 7 is sleeved with an elastic rubber ring 19; the inner peripheral side of the elastic rubber ring 19 is provided from top to bottom with two groups of annular rubber sealing ribs 21 respectively matched with the first annular sealing groove 20 and the second annular sealing groove 18; a plurality of anti-skid lines 22 are provided on the outer peripheral side of the elastic rubber ring 19 and the outer peripheral side of the rubber handle 17.

[0037] The outer peripheral side of the metal sheet sleeve 7 is symmetrically fixed with a sleeve 23 close to the bottom thereof; the retainer 8 is made of plastic material, and the outer peripheral side thereof is symmetrically fixed with a U-shaped seat 24 provided with a hollow structure inside; the inner wall of the U-shaped seat 24 is fixed with an ear rod 25; the ear rod 25 is slidably provided with a plug-in part 26 inserted and matched with the inner wall of the sleeve 23.

[0038] The inner wall of the sleeve 23 is provided with a plug slot 27; the plug-in part 26 includes a support plate 28 slidably matched with the inner wall of the sleeve 23; the side surface of the support plate 28 is provided with a guide hole 29 slidably matched with the ear rod 25; the support plate 28 and the inner wall of the U-shaped seat 24 are fixedly connected with an extrusion spring 30 sleeved on the ear rod 25; the side surface of the support plate 28 is fixed with a plug block 31 inserted and matched with the plug slot 27 close to the top thereof; the side surface of the support plate 28 is fixed with a curved plate 33.

[0039] The working principle of this embodiment two is:

[0040] By installing the thyristor 2, the first plug-in piece, the second plug-in piece and the thermal expansion contact into the corresponding second installation cavity group 10, the third installation cavity group 11 and the fourth installation cavity group 12 in sequence, and then inserting the sealing cover 6 into the bottom of the metal sheet sleeve 7, during the insertion process, the curved plate 33 is pressed inwardly to make the support plate 28 slide along the ear rod 25 towards the metal sheet sleeve 7, the corresponding compression spring 30 is compressed, so that the support plate 28 can slide smoothly into the sleeve 23, after the insertion is completed, the hand pressing the curved plate 33 is released, under the elastic reset force of the compression spring 30, the plug-in block 31 on the side of the support plate 28 is inserted into the insertion slot 27 on the sleeve 23, and the stable connection between the retainer 8 and the metal sheet sleeve 7 is completed.

[0041] The sealing cover 6 is inserted into the top of the corresponding metal sheet sleeve 7, and then the elastic rubber ring 19 is moved to the corresponding position, so that the two groups of annular rubber sealing ribs 21 on the inner wall of the elastic rubber ring 19 are respectively inserted into the corresponding first annular sealing groove 20 and the second annular sealing groove 18, and the stable sealing connection between the sealing cover 6 and the metal sheet sleeve 7 is realized.

[0042] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0043] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0044] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0045] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

[0046] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A shielded pump single-phase motor thyristor starter module, comprising a thyristor starter (1) electrically connected with a shielded pump single-phase motor; characterized in that: the shielded pump single-phase motor power input end is respectively electrically connected with an L line and an N line; the shielded pump single-phase motor is internally provided with a starting winding and a running winding connected in parallel with each other; the starting winding is connected in series with a power output resistor; the starting winding is connected in series with the thyristor starter (1); the thyristor starter (1) comprises a thyristor (2), a bimetallic electrostrictive blade delay switch and a heating resistance wire; the bottom of the thyristor (2) is sequentially provided with a thyristor Gate grid (3), a thyristor T1 end (4) and a thyristor T2 end (5); the current output resistor and the bimetallic electrostrictive blade delay switch are electrically connected through the heating resistance wire.

2. The shielded pump single-phase motor thyristor starter module according to claim 1, characterized in that: the L line is electrically connected with a thermal resistor connected in series with the running winding and the starting winding; the L line and the N line are electrically connected through the running winding; the L line and the N line are electrically connected through the thyristor starter (1).

3. The shielded pump single-phase motor thyristor starter module according to claim 2, characterized in that: the thyristor starter (1) further comprises a sealing cover (6) and a metal sheet metal sleeve (7) inserted and matched with each other; the bottom of the metal sheet metal sleeve (7) is inserted and provided with a retainer (8); the surface of the retainer (8) is provided with a first installation cavity group (9) matched with the thyristor Gate grid (3), the thyristor T1 end (4) and the thyristor T2 end (5).

4. The shielded pump single-phase motor thyristor starter module according to claim 3, characterized in that: the bimetallic electrostrictive blade delay switch comprises a first insertion piece, a second insertion piece and a thermal expansion contact inserted and provided on the retainer (8) respectively; the retainer (8) is respectively provided with a second installation cavity group (10), a third installation cavity group (11) and a fourth installation cavity group (12) matched with the first insertion piece, the second insertion piece and the thermal expansion contact.

5. The shielded pump single-phase motor thyristor starter module according to claim 4, characterized in that: the first insertion piece is a first conductive copper galvanized connecting piece (32); the second insertion piece is composed of a second conductive copper galvanized connecting piece (13) and a bimetallic static contact (14) fixedly connected with each other; the thermal expansion contact is composed of a third conductive copper galvanized connecting piece (15) and a bimetallic dynamic contact (16).

6. The shielded pump single-phase motor thyristor starter module according to claim 5, characterized in that: ​ The sealing cover (6) is provided with a plurality of rubber handles (17) arranged in a circular array on the outer circumferential side; a first annular sealing groove (20) is formed on the outer circumferential side of the sealing cover (6) near the bottom; a second annular sealing groove (18) is formed on the outer circumferential side of the metal sheet sleeve (7); the metal sheet sleeve (7) is sleeved with an elastic rubber ring (19); the inner circumferential side of the elastic rubber ring (19) is provided from top to bottom with two groups of annular rubber sealing ribs (21) respectively matched with the first annular sealing groove (20) and the second annular sealing groove (18); a plurality of anti-skid lines (22) are formed on the outer circumferential side of the elastic rubber ring (19) and the outer circumferential side of the rubber handle (17).

7. The single-phase motor thyristor starter module of a shielded pump according to claim 6, characterized in that: The metal sheet sleeve (7) is symmetrically fixed with a sleeve (23) near the bottom of the outer circumferential side; the retainer (8) is made of plastic material, and the outer circumferential side thereof is symmetrically fixed with a U-shaped seat (24) with a hollow structure inside; the U-shaped seat (24) is fixed with an ear rod (25) on the inner wall; the ear rod (25) is slidably provided with a plug-in part (26) inserted into the inner wall of the sleeve (23).

8. The single-phase motor thyristor starter module of a shielded pump according to claim 7, characterized in that: The sleeve (23) is provided with a plug-in groove (27) on the inner wall; the plug-in part (26) includes a support plate (28) slidably matched with the inner wall of the sleeve (23); the support plate (28) is provided with a guide hole (29) slidably matched with the ear rod (25) on the side surface; the support plate (28) and the inner wall of the U-shaped seat (24) are fixedly connected with an extrusion spring (30) sleeved on the ear rod (25); the support plate (28) is fixed with a plug-in block (31) inserted into the plug-in groove (27) near the top of the side surface; and the support plate (28) is fixed with a curved plate (33) on the side surface.

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