CN219159113U - Plunger pump with swash plate for distributing flow - Google Patents

Abstract

The plunger pump comprises a pump body, an end cover and a main shaft, wherein one end of the pump body is hollow, the end cover is arranged at the open end of the pump body, the end cover is rotationally connected with the main shaft, one end of the main shaft extends into the inner cavity of the pump body, and an oil inlet and an oil outlet which are communicated with the inner cavity of the pump body are arranged at intervals at the closed end of the pump body; one end of the main shaft positioned in the pump body is eccentrically connected with a sloping cam plate, one end of the sloping cam plate is in sliding fit with the closed end of the pump body, the end part of the sloping cam plate, which corresponds to the main shaft, is provided with a conical cavity, and a steel ball which is contacted with the end part of the main shaft is arranged in the conical cavity; the barycenter of the sloping cam plate coincides with the axis of the main shaft, one side of the sloping cam plate, which is close to the main shaft, is a small head, and the other side is a large head; an annular boss movably sleeved with the main shaft is arranged on the inner side of the end cover, and an upper sliding disc coaxially movably sleeved with the main shaft is arranged between the annular boss and the sloping cam plate; the utility model avoids the rotation of the plunger tube following the rotor assembly in the prior art and eliminates the lateral force.

Description

Plunger pump with swash plate for distributing flow

Technical Field

The utility model relates to the technical field of plunger pumps, in particular to a plunger pump with a swash plate for distributing flow.

Background

As is known, a plunger pump is a main device for realizing high-pressure output in a hydraulic system, and has high output pressure, and can still maintain high volumetric efficiency and total efficiency under high pressure; in the traditional plunger pump, a transmission shaft drives a rotor assembly to rotate, and a swash plate with a fixed angle drives a plunger in a plunger hole on a rotor to reciprocate, so that the oil sucking and discharging process is completed; however, the conventional plunger pump structure has some disadvantages, such as: 1. in the working process, the rotor generates overturning moment by the lateral force of the plunger, so that the rotor body is stressed in a complex manner; 2. the rotational inertia is large and a large unstable centrifugal force exists under the high-speed rotation working condition; 3. the plunger can have overlarge speed and acceleration under the working condition of high-speed rotation, and the stability is poor; 4. the number of friction pairs in the pump is large, the relative movement speed is high, and the reliability is low; the above-mentioned drawbacks are a problem to be solved by those skilled in the art.

Disclosure of Invention

In order to overcome the defects in the background technology, the utility model discloses a plunger pump with a swash plate for distributing flow.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:

the plunger pump comprises a pump body, an end cover and a main shaft, wherein one end of the pump body is hollow, the end cover is arranged at the open end of the pump body, the end cover is rotationally connected with the main shaft, one end of the main shaft extends into the inner cavity of the pump body, and an oil inlet and an oil outlet which are communicated with the inner cavity of the pump body are arranged at intervals at the closed end of the pump body;

one end of the main shaft positioned in the pump body is eccentrically connected with a sloping cam plate, one end of the sloping cam plate is in sliding fit with the closed end of the pump body, the end part of the sloping cam plate, which corresponds to the main shaft, is provided with a conical cavity, and a steel ball which is contacted with the end part of the main shaft is arranged in the conical cavity; the barycenter of the sloping cam plate coincides with the axis of the main shaft, one side of the sloping cam plate, which is close to the main shaft, is a small head, and the other side is a large head; an annular boss movably sleeved with the main shaft is arranged on the inner side of the end cover, an upper sliding plate coaxially movably sleeved with the main shaft is arranged between the annular boss and the sloping cam plate, one end of the upper sliding plate is in universal fit with the annular boss, and the other end of the upper sliding plate is in sliding fit with the sloping cam plate;

a plurality of plunger assemblies are arranged between the upper sliding plate and the end cover at intervals along the circumferential direction, each plunger assembly comprises a plunger tube with two open ends, two spherical sleeves are movably arranged at two ends of each plunger tube, and the two spherical sleeves are respectively and universally connected with the upper sliding plate and the end cover; a limiting mechanism for preventing the upper slide plate from rotating is arranged between one side of the upper slide plate and the pump body; the positions of the upper slide disc surfaces corresponding to the plunger assemblies are respectively provided with an oil passing hole which can be covered by the large head part of the swash plate and can be exposed outside the small head part of the swash plate, and the oil passing holes are correspondingly communicated with the plunger tubes;

the large head part of the inclined end of the sloping cam plate is provided with a high-pressure oil cavity which can be communicated with the oil passing hole, the other end of the sloping cam plate is provided with an 8-shaped oil discharging cavity, one circular cavity of the oil discharging cavity is correspondingly communicated with the high-pressure oil cavity, and the other circular cavity is coaxial with the main shaft and is communicated with the oil outlet; and the outer sides of the swash plates corresponding to the high-pressure oil chambers and the oil discharge chambers are respectively provided with an oil discharge groove.

Preferably, the high-pressure oil cavity is of an arc-shaped cavity structure with the center of a circle coincident with the axis of the main shaft, and the excircle of the large head part of the swash plate is provided with a weight reduction groove.

Preferably, the closed end in the pump body is provided with a wear-resisting disc in sliding fit with the sloping cam plate, a pin is arranged between the wear-resisting disc and the closed end of the pump body, and a ring sleeve which is coaxially and tightly spliced with the oil outlet is arranged at the position of the wear-resisting disc corresponding to the oil outlet.

Preferably, the oil outlet is coaxial with the main shaft, the swash plate is provided with an oil discharge pipe which is correspondingly and coaxially connected with the wear-resistant disc ring sleeve in a rotating manner, and the oil discharge pipe is correspondingly communicated with the oil discharge cavity.

Preferably, a copper sleeve is arranged between the oil drain pipe and the wear-resistant disc ring sleeve, and a reinforcing rib is arranged in the oil drain pipe.

Preferably, one end of the upper sliding plate deviating from the swash plate is provided with a lower sliding plate, the inner side of the end cover is provided with a pressing plate coaxially sleeved with the annular boss of the end cover, and the positions between the lower sliding plate and the upper sliding plate and between the pressing plate and the end cover, which correspond to the plunger assemblies, are respectively provided with a spherical cavity which corresponds to the corresponding spherical sleeve in a universal fit manner.

Preferably, the lower sliding plate is in corresponding universal fit with the annular boss of the end cover through a supporting spherical hinge, and the supporting spherical hinge is movably sleeved with the main shaft and is correspondingly and fixedly connected with the annular boss of the end cover.

Preferably, the limiting mechanism comprises a limiting pin arranged on the inner wall of the pump body, and the upper sliding plate is provided with a sliding groove in sliding fit with the limiting pin; or the limiting pin is arranged on the upper sliding plate, and the inner wall of the pump body is provided with a sliding groove which is in sliding fit with the limiting pin.

Preferably, a sealing ring is arranged between the pump body and the end cover, and an oil seal is arranged between the main shaft and the end cover.

Preferably, the main shaft is rotatably connected with the end cover through a bearing.

The utility model discloses a plunger pump with a swash plate for distributing flow, which has the following beneficial effects due to the adoption of the technical scheme:

1. the utility model adopts a swash plate structure mode, cancels a valve plate structure and realizes the functional integration of the swash plate and the valve plate;

2. according to the utility model, the force balance and the moment balance of the swash plate are realized through the oil discharging cavity structure design, so that the stress of a related structure is optimized;

3. the barycenter of the swash plate is overlapped with the axis of the main shaft, so that the rotation centrifugal force of the swash plate is reduced;

4. the plunger tube has a simple structure and is easy to process; the two ends of the plunger component are connected in a spherical hinge pair mode, so that lateral force is eliminated, the stress condition is good, and higher-rotation-speed operation can be realized; the plunger tube freely moves between the two ball sleeves, and the pressures at the two sides of the plunger tube are balanced, so that the excessive axial speed and acceleration of the plunger tube under the working condition of high-speed movement are avoided, and the stability is improved; the plunger tube structure has better stress condition, the length of the plunger tube can be greatly reduced, and the plunger tube structure is more compact only by ensuring enough sealing length;

5. according to the utility model, the plunger tube is prevented from following the rotary motion of the rotor assembly in the prior art, the small-range swing of the plunger assembly is realized, and the centrifugal force of the motion is small;

6. the utility model omits a rotor structure and a sliding shoe structure, has smaller moment of inertia and less friction pairs, and greatly improves the reliability;

7. the utility model has low relative movement speed between friction pairs and higher reliability.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a swash plate;

FIG. 3 is a schematic view of a swash plate;

FIG. 4 is a schematic view of a swash plate;

fig. 5 is a schematic structural view of the plunger assembly.

In the figure: 1. a pump body; 2. an end cap; 3. an oil inlet; 4. an oil outlet; 5. a main shaft; 6. a swash plate; 7. an upper slide plate; 8. a plunger tube; 9. a weight reduction groove; 10. a ball sleeve; 11. an oil passing hole; 12. a high-pressure oil chamber; 13. an oil discharge chamber; 14. a limiting mechanism; 15. abrasion-resistant disc; 16. a pin; 17. a copper sleeve; 18. a lower slide plate; 19. a pressing plate; 20. supporting the spherical hinge; 21. a seal ring; 22. an oil seal; 23. a bearing; 24. an oil drain groove; 25. a steel ball; 26. and an oil discharge pipe.

Detailed Description

The present utility model will be explained in detail by the following examples, and the purpose of the present utility model is to protect all technical improvements within the scope of the present utility model, and in the description of the present utility model, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., only correspond to the drawings of the present application, and in order to facilitate description of the present utility model, it is not necessary to indicate or imply that the apparatus or element referred to has a specific orientation.

Embodiment one:

referring to fig. 1-5, a plunger pump with a swash plate for distributing flow comprises a pump body 1, an end cover 2 and a main shaft 5, wherein the pump body 1 is hollow and has one open end, the end cover 2 is arranged at the open end of the plunger pump, the main shaft 5 with one end extending into the inner cavity of the pump body 1 is rotatably connected with the end cover 2, an oil inlet 3 and an oil outlet 4 which are communicated with the inner cavity of the pump body 1 are arranged at intervals at the closed end of the pump body 1, namely liquid can enter the inner cavity of the pump body 1 through the oil inlet 3; when the novel swash plate is used, the main shaft 5 can be driven by the motor, one end of the main shaft 5 positioned in the pump body 1 is eccentrically connected with the swash plate 6, and the other end of the swash plate is in sliding fit with the closed end of the pump body 1; the end part of the sloping cam plate 6 corresponding to the main shaft 5 is provided with a conical cavity, a steel ball 25 contacted with the end part of the main shaft 5 is arranged in the conical cavity, the steel ball 25 can axially position the main shaft 5, the axial movement of the main shaft 5 is avoided, and meanwhile, the abrasion between the end surface of the main shaft 5 and the sloping cam plate 6 is avoided; the small head is arranged on one side of the swash plate 6, which is close to the main shaft 5, and the large head is arranged on the other side, namely the main shaft 5 can drive the swash plate 6 to rotate, the barycenter of the swash plate 6 is overlapped with the axis of the main shaft 5, and the rotation centrifugal force of the swash plate 6 is reduced; an annular boss movably sleeved with the main shaft 5 is arranged on the inner side of the end cover 2, an upper slide plate 7 coaxially and movably sleeved with the main shaft 5 is arranged between the annular boss and the swash plate 6, one end of the upper slide plate 7 is in universal fit with the annular boss, the other end of the upper slide plate 7 is in sliding fit with the inclined end of the swash plate 6, namely the upper slide plate 7 can be pushed to swing in space in the rotating process of the swash plate 6, and meanwhile, the influence of mutual interference between the upper slide plate 7 and the main shaft 5 in the swinging process of the upper slide plate 7 is ensured;

a plurality of plunger assemblies are distributed between the upper sliding plate 7 and the end cover 2 along the circumferential direction at intervals, each plunger assembly comprises a plunger tube 8 with two open ends, ball sleeves 10 are movably arranged at two ends of each plunger tube 8, the two ball sleeves 10 are respectively connected with the upper sliding plate 7 and the end cover 2 in a universal mode, namely, the plunger tubes 8 freely move between the two ball sleeves 10 along with the space swing of the sliding plate 7, compared with the existing structure, the pressure at two sides of each plunger tube 8 is balanced, the lateral force is eliminated, the excessive axial speed and acceleration of each plunger tube 8 under the high-speed movement working condition are avoided, and the stability is improved; according to the requirement, one end of the upper slide plate 7, which is far away from the swash plate 6, is provided with a lower slide plate 18, the inner side of the end cover 2 is provided with a pressing plate 19 coaxially sleeved with the annular boss of the end cover 2, and spherical cavities which are in corresponding universal fit with the corresponding spherical sleeves 10 are respectively arranged between the lower slide plate 18 and the upper slide plate 7 and between the pressing plate 19 and the end cover 2 and correspond to the plunger assemblies; the lower slide plate 18 is in corresponding universal fit with the annular boss of the end cover 2 through the supporting spherical hinge 20, the supporting spherical hinge 20 is movably sleeved with the main shaft 5 and is correspondingly and fixedly connected with the annular boss of the end cover 2, so that the stability of the upper slide plate 7 and the lower slide plate 18 is effectively improved; a limiting mechanism 14 for preventing the upper slide plate 7 from rotating is arranged between one side of the upper slide plate 7 and the pump body 1; according to the requirement, the limiting mechanism 14 comprises a limiting pin arranged on the inner wall of the pump body 1, and the upper sliding plate 7 is provided with a sliding groove in sliding fit with the limiting pin; or the limiting pin is arranged on the upper sliding plate 7, the inner wall of the pump body 1 is provided with a sliding groove in sliding fit with the limiting pin, namely, the axial rotation of the upper sliding plate 7 is limited through the matching of the limiting pin and the sliding groove, and meanwhile, the limiting pin can slide along the sliding groove without influencing the space swing of the upper sliding plate 7;

the positions of the upper slide plate 7, which correspond to the plunger assemblies, are respectively provided with an oil passing hole 11 which can be covered by the large head part of the swash plate 6 and can be exposed outside the small head part of the swash plate 6, and the oil passing holes 11 are correspondingly communicated with the plunger tubes 8; the large head part of the inclined end of the swash plate 6 is provided with a high-pressure oil cavity 12 which can be communicated with the oil passing hole 11, the other end of the inclined end of the swash plate is provided with an 8-shaped oil discharging cavity 13, one circular cavity of the oil discharging cavity 13 is correspondingly communicated with the high-pressure oil cavity 12, the other circular cavity is coaxial with the main shaft 5 and is communicated with the oil outlet 4, namely the volume of the cavity between the oil passing hole 11 and the plunger tube 8 changes along with the swing of the upper slide plate 7, the volume of the cavity is reduced when the oil passing hole 11 is exposed to the large head part of the upper slide plate 7, so that liquid in the cavity is pressed into the high-pressure oil cavity 12, then enters the oil discharging cavity 13 and is discharged through the oil outlet 4, and the purpose of oil discharging is realized; the volume of the cavity is increased in the process from the large head of the upper slide plate 7 to the exposure of the oil passing hole 11 along with the continuous rotation of the swash plate 6, and the liquid in the pump body 1 can enter the cavity between the oil passing hole 11 and the plunger tube 8, so that the oil absorption purpose is realized; the swash plate 6 is equipped with the oil drain groove 24 corresponding to the outside of high-pressure oil pocket 12 and oil drain chamber 13, can store along the liquid of swash plate 6 both ends leakage, plays lubricated effect, and oil drain groove 24 is equipped with the opening simultaneously, can discharge the liquid of leakage.

When in use, the oil inlet 3 is communicated with the liquid storage tank, so that liquid can enter the pump body 1 through the oil inlet 3; the main shaft 5 is driven by a motor, the main shaft 5 can drive the swash plate 6 to rotate, and the upper slide plate 7 can be pushed to swing in space in the rotation process of the swash plate 6; the volume of the cavity between the oil passing hole 11 and the plunger tube 8 is changed along with the swing of the upper sliding plate 7, the volume of the cavity is reduced when the oil passing hole 11 is exposed to the large head part of the upper sliding plate 7, so that the liquid in the cavity is pressed into the high-pressure oil cavity 12 and then enters the oil discharging cavity 13 to be discharged through the oil outlet 4, and the purpose of oil discharging is realized; with the continued rotation of the swash plate 6, the volume of the cavity is increased in the process that the oil passing hole 11 is exposed from the large head of the upper slide plate 7, and the liquid in the pump body 1 can enter the cavity between the oil passing hole 11 and the plunger tube 8, so that the purpose of absorbing oil is realized.

Embodiment two:

1-5, a plunger pump with a swash plate for distributing flow is different from the first embodiment in that, on the basis of the first embodiment, the high-pressure oil cavity 12 is of an arc-shaped cavity structure with the center of a circle coinciding with the axis of the main shaft 5, so that liquid in a cavity between the oil passing hole 11 and the plunger pipe 8 can conveniently enter the high-pressure oil cavity 12, and the obstruction to the swing of the upper slide disk 7 is avoided; meanwhile, the outer circle of the large head part of the swash plate 6 is provided with the weight reducing groove 9, so that the mass center of the swash plate 6 can be conveniently adjusted, and the production and the processing and the structural optimization design of the swash plate 6 are convenient.

Embodiment III:

1-5, on the basis of the first or second embodiment, the closed end in the pump body 1 is provided with a wear-resisting disc 15 in sliding fit with the swash plate 6, a pin 16 is arranged between the wear-resisting disc 15 and the closed end of the pump body 1, the position of the wear-resisting disc 15 corresponding to the oil outlet 4 is provided with a ring sleeve in coaxial and tight plug connection with the oil outlet 4, and the wear-resisting disc 15 has better wear resistance and can effectively prolong the service life; the oil outlet 4 is coaxial with the main shaft 5, the swash plate 6 is provided with an oil discharge pipe 26 which is correspondingly and coaxially connected with the wear-resistant disc 15 in a rotary mode, and the oil discharge pipe 26 is correspondingly communicated with the oil discharge cavity 13, so that the stability of the swash plate 6 is effectively improved; the copper sleeve 17 is arranged between the oil drain pipe 26 and the wear-resistant disc 15, so that friction between the oil drain pipe 26 and the wear-resistant disc 15 is effectively reduced, and the reinforcing ribs are arranged in the oil drain pipe 26, so that the structural strength of the wear-resistant disc is effectively improved.

Embodiment four:

1-5, a plunger pump with a swash plate for distributing flow is provided, on the basis of any one of the first to third embodiments, a sealing ring 21 is arranged between the pump body 1 and the end cover 2, and an oil seal 22 is arranged between the main shaft 5 and the end cover 2, so that the overall sealing performance is effectively improved; the main shaft 5 is rotatably connected with the end cover 2 through the bearing 23, so that the stability of the rotation of the main shaft 5 is effectively improved.

The utility model has not been described in detail in the prior art, and it is apparent to those skilled in the art that the utility model is not limited to the details of the above-described exemplary embodiments, but that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and range of equivalency are intended to be embraced therein.

Claims (10)

1. The utility model provides a plunger pump of sloping cam plate joining in marriage class, contains pump body (1), end cover (2) and main shaft (5), and the inside cavity of pump body (1) just one end is uncovered, and end cover (2) are installed to its open end, and end cover (2) rotate and are connected with main shaft (5) that one end stretched into pump body (1) inner chamber, and the interval of pump body (1) blind end is equipped with oil inlet (3) and oil-out (4) with its inner chamber intercommunication; the method is characterized in that:

one end of the main shaft (5) positioned in the pump body (1) is eccentrically connected with a sloping cam plate (6) with one end in sliding fit with the closed end of the pump body (1) and the other end inclined, the end of the sloping cam plate (6) corresponding to the main shaft (5) is provided with a conical cavity, and a steel ball (25) contacted with the end of the main shaft (5) is arranged in the conical cavity; the barycenter of the sloping cam plate (6) is coincident with the axis of the main shaft (5), one side of the sloping cam plate (6) close to the main shaft (5) is a small head, and the other side is a large head; an annular boss movably sleeved with the main shaft (5) is arranged on the inner side of the end cover (2), an upper sliding plate (7) coaxially and movably sleeved with the main shaft (5) is arranged between the annular boss and the sloping cam plate (6), one end of the upper sliding plate (7) is in universal fit with the annular boss, and the other end of the upper sliding plate is in sliding fit with the sloping cam plate (6);

a plurality of plunger assemblies are distributed between the upper sliding plate (7) and the end cover (2) along the circumferential direction at intervals, each plunger assembly comprises a plunger tube (8) with two open ends, ball sleeves (10) are movably arranged at two ends of each plunger tube (8), and the two ball sleeves (10) are respectively and universally connected with the upper sliding plate (7) and the end cover (2); a limiting mechanism (14) for preventing the upper slide plate (7) from rotating is arranged between one side of the upper slide plate (7) and the pump body (1); the positions of the upper sliding disc (7) corresponding to the plunger assemblies are respectively provided with an oil passing hole (11) which can be covered by the large head part of the swash plate (6) and can be exposed outside the small head part of the swash plate (6), and the oil passing holes (11) are correspondingly communicated with the plunger pipes (8);

the large head part of the inclined end of the sloping cam plate (6) is provided with a high-pressure oil cavity (12) which can be communicated with the oil passing hole (11), the other end of the sloping cam plate is provided with an 8-shaped oil discharging cavity (13), one circular cavity of the oil discharging cavity (13) is correspondingly communicated with the high-pressure oil cavity (12), and the other circular cavity is coaxial with the main shaft (5) and is communicated with the oil outlet (4); and the outer sides of the swash plates (6) corresponding to the high-pressure oil cavities (12) and the oil discharge cavities (13) are respectively provided with an oil discharge groove (24).

2. The swash plate split plunger pump of claim 1, wherein: the high-pressure oil cavity (12) is of an arc-shaped cavity structure with the center of a circle coincident with the axis of the main shaft (5), and the excircle of the large head part of the swash plate (6) is provided with a weight reduction groove (9).

3. The swash plate split plunger pump of claim 1, wherein: the inner closed end of the pump body (1) is provided with a wear-resisting disc (15) which is in sliding fit with the swash plate (6), a pin (16) is arranged between the wear-resisting disc (15) and the closed end of the pump body (1), and a ring sleeve which is coaxially and tightly spliced with the oil outlet (4) is arranged at the position of the wear-resisting disc (15) corresponding to the oil outlet (4).

4. A swash plate split plunger pump as claimed in claim 3, wherein: the oil outlet (4) is coaxial with the main shaft (5), the swash plate (6) is provided with an oil discharge pipe (26) which is correspondingly and coaxially connected with the ring sleeve of the wear-resisting disc (15) in a rotating way, and the oil discharge pipe (26) is correspondingly communicated with the oil discharge cavity (13).

5. The swash plate split plunger pump of claim 4, wherein: copper sleeves (17) are arranged between the oil drain pipe (26) and the wear-resistant disc (15) in a ring sleeve, and reinforcing ribs are arranged in the oil drain pipe (26).

6. The swash plate split plunger pump of claim 1, wherein: the one end that goes up slide (7) and deviate from sloping cam plate (6) is equipped with slide (18), and end cover (2) inboard be equipped with end cover (2) annular boss coaxial cover between slide (18) and last slide (7) and the position of corresponding plunger subassembly between clamp plate (19) and end cover (2) all be equipped with corresponding spherical sleeve (10) corresponding universal complex spherical cavity.

7. The swash plate split plunger pump of claim 6, wherein: the lower sliding plate (18) is in corresponding universal fit with the annular boss of the end cover (2) through a supporting spherical hinge (20), and the supporting spherical hinge (20) is movably sleeved with the main shaft (5) and is correspondingly and fixedly connected with the annular boss of the end cover (2).

8. The swash plate split plunger pump of claim 1, wherein: the limiting mechanism (14) comprises a limiting pin arranged on the inner wall of the pump body (1), and the upper sliding plate (7) is provided with a sliding groove in sliding fit with the limiting pin; or a limiting pin arranged on the upper sliding plate (7), and a sliding groove which is in sliding fit with the limiting pin is arranged on the inner wall of the pump body (1).

9. The swash plate split plunger pump of claim 1, wherein: a sealing ring (21) is arranged between the pump body (1) and the end cover (2), and an oil seal (22) is arranged between the main shaft (5) and the end cover (2).

10. The swash plate split plunger pump of claim 1, wherein: the main shaft (5) is rotationally connected with the end cover (2) through a bearing (23).

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