Shield pump for conveying granular medium

Abstract

The utility model discloses a shield pump for conveying granular media, which comprises a connecting seat, the front end of the connecting seat is connected with a pump shell through a flange, the rear end of the connecting seat is fixedly connected with a machine shell, a shaft sleeve is rotatably arranged in the middle of the connecting seat in a penetrating manner, and one end, facing the pump shell, of the shaft sleeve is fixedly connected with a baffle ring. The baffle ring is located in the pump shell, a plurality of arc-shaped grooves are formed in the end face, facing the shaft sleeve, of the baffle ring, a rotating shaft fixedly penetrates through the shaft sleeve and the baffle ring jointly, and the end, located in the pump shell, of the rotating shaft is fixedly connected with an impeller. In the process of conveying granular media, the rotor can drive the baffle ring to rotate in the pump shell, so that fine particles entering the gap between the baffle ring and the connecting seat can be thrown out of the baffle ring under the action of the arc-shaped groove, and the fine granular media entering the shielding cover from the fit gap between the shaft sleeve and the connecting seat are reduced; therefore, the probability that the shaft sleeve is stuck and the shielding sleeve is damaged is reduced, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to a shielded pump, in particular to a shielded pump used for conveying granular media. Background Art

[0002] A canned motor pump is a leak-proof pump that integrates a canned motor and pump. It primarily consists of a pump body, impeller, stator, rotor, front and rear bearings, and a thrust plate. The stator and rotor are each isolated by a non-magnetic, corrosion-resistant shielding sleeve, eliminating the need for any dynamic seals to prevent media leakage.

[0003] When existing shielded pumps are used to transport granular media, many fine particles will enter between the rotor and the shielding sleeve through the front bearing (sleeve) of the rotating shaft, which can easily cause the front bearing to become stuck or the shielding sleeve to be damaged due to friction between the granular media and the shielding sleeve. This needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a shielded pump for conveying granular media, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A shielded pump for conveying particulate media includes a connecting seat, the front end flange of the connecting seat is connected to the pump casing, the rear end of the connecting seat is fixedly connected to the casing, the middle part of the connecting seat is rotatably provided with a shaft sleeve, the end of the shaft sleeve facing the pump casing is fixedly connected to a retaining ring, the retaining ring is located in the pump casing, and the end surface of the retaining ring facing the shaft sleeve is provided with multiple arc grooves, a rotating shaft is fixedly provided in the shaft sleeve and the retaining ring, one end of the rotating shaft located in the pump casing is fixedly connected to an impeller, the outer wall of the rotating shaft located in the casing is fixedly sleeved with a motor rotor, the rear end flange of the casing is connected to an end cover, the inner wall of the casing is fixedly installed with a motor stator, the motor rotor is located on the inner side of the motor stator, and a shielding sleeve is detachably installed in the casing between the motor rotor and the motor stator.

[0007] As a further solution of the present invention: a plurality of spiral grooves are formed on the outer peripheral wall of the shaft sleeve.

[0008] As a further solution of the present invention: one end of the shaft sleeve located in the housing is fixedly connected to a retaining ring by a plurality of screws.

[0009] As a further solution of the present invention: a mounting seat is fixedly provided at the middle of one end of the end cover facing the rotating shaft, and the rear end of the rotating shaft is rotatably connected to the mounting seat through a rear bearing.

[0010] As a further solution of the present invention: a boss is integrally formed in the middle of the rear end face of the connecting seat, the front end of the shielding sleeve is mounted on the boss, a plurality of first sealing rings are nested in the outer peripheral wall of the boss, the outer wall of the first sealing ring fits with the inner wall of the shielding sleeve, the rear end of the shielding sleeve is mounted on the mounting seat, a plurality of second sealing rings are nested in the outer peripheral wall of the mounting seat, the outer wall of the second sealing ring fits with the inner wall of the shielding sleeve.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] During the process of conveying the granular medium, the rotor of the utility model drives the retaining ring to rotate in the pump casing. Therefore, the fine particles entering the gap between the retaining ring and the connecting seat will be thrown out to the outside of the retaining ring under the action of the arc groove, thereby reducing the fine particle medium entering the shielding cover through the matching gap between the shaft sleeve and the connecting seat, thereby reducing the probability of the shaft sleeve being stuck and the shielding cover being damaged, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a shielded pump used to transport granular media.

[0014] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0015] Figure 3 This is a schematic diagram of the structure of a spiral groove in a shielded pump used to transport granular media.

[0016] Figure 4 This is a schematic diagram of the structure of an arc groove in a shielded pump used to transport granular media.

[0017] Among them, the connecting seat 1, pump casing 2, shaft sleeve 3, spiral groove 4, retaining ring 5, arc groove 6, retaining ring 7, rotating shaft 8, motor rotor 9, casing 10, motor stator 11, end cover 12, mounting seat 13, rear bearing 14, shielding sleeve 15, first sealing ring 16, second sealing ring 17, and impeller 18. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It is to be understood that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or indirectly on or connected to the other element by way of one or more other elements.

[0020] It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0022] Please refer to Figures 1 to 4 In the embodiment of the present application, a shielding pump for conveying particulate medium, comprising a connecting seat 1, the front end flange of the connecting seat 1 is connected with a pump shell 2, the rear end of the connecting seat 1 is fixedly connected with a machine shell 10, the middle part of the connecting seat 1 is rotatably provided with a shaft sleeve 3, one end of the shaft sleeve 3 fixedly connected with a baffle ring 5 towards the pump shell 2, the baffle ring 5 is located in the pump shell 2, and a plurality of arc grooves 6 are formed in the end face of the baffle ring 5 towards the shaft sleeve 3, the shaft sleeve 3 and the baffle ring 5 are fixedly provided with a rotating shaft 8, one end of the rotating shaft 8 located in the pump shell 2 is fixedly connected with an impeller 18, the outer wall of the rotating shaft 8 located in the machine shell 10 is fixedly sleeved with a motor rotor 9, the rear end flange of the machine shell 10 is connected with an end cover 12, the inner wall of the machine shell 10 is fixedly installed with a motor stator 11, the motor rotor 9 is located on the inner side of the motor stator 11, and the machine shell 10 is detachably installed with a shielding sleeve 15 between the motor rotor 9 and the motor stator 11.

[0023] By adopting the above-mentioned scheme, the utility model, when in use, connects the medium input port and the medium output port on the pump casing 2 to the conveying pipeline of the granular medium, and energizes the motor stator 11. The electronic stator 11 can be used to cooperate with the motor rotor 9 to drive the rotating shaft 8 to rotate, thereby driving the impeller 18 to rotate in the pump casing 2 to realize the conveying of the granular medium. In the process of conveying the granular medium, the rotor will drive the retaining ring 5 to rotate in the pump casing 2, so that the fine particles entering the gap between the retaining ring 5 and the connecting seat 1 will be thrown out to the outside of the retaining ring 5 under the action of the arc groove 6, thereby reducing the fine particle medium entering the shielding cover 15 from the matching gap between the shaft sleeve 3 and the connecting seat 1, thereby reducing the probability of the shaft sleeve 3 being stuck and the shielding cover being damaged, and the use effect is good.

[0024] Specific combination Figure 3 In one embodiment of the present invention, a plurality of spiral grooves 4 are provided on the outer peripheral wall of the shaft sleeve 3. By utilizing the arrangement of the plurality of spiral grooves 4, the fine particle medium in the fitting gap between the shaft sleeve 3 and the connecting seat 1 will be brushed out into the pump casing 2 by the spiral grooves 4 as the shaft sleeve 3 rotates, so as to further reduce the fine particle medium entering the shielding sleeve 15.

[0025] Specific combination Figure 2 In one embodiment of the present invention, one end of the sleeve 3 located in the housing 10 is fixedly connected to a retaining ring 7 by a plurality of screws to prevent the sleeve 3 from moving over a large range on the connecting seat 1.

[0026] Specific combination Figure 1 In one embodiment of the present invention, a mounting seat 13 is fixedly provided at the middle of one end of the end cover 12 facing the rotating shaft 8, and the rear end of the rotating shaft 8 is rotatably connected to the mounting seat 13 through a rear bearing 14 to ensure the stability of the rotation of the rotating shaft 8.

[0027] Specific combination Figure 1 and Figure 2 In one embodiment of the present utility model, a boss is integrally formed in the middle of the rear end face of the connecting seat 1, the front end of the shielding sleeve 15 is sleeved on the boss, and a plurality of first sealing rings 16 are nested in the outer peripheral wall of the boss, and the outer wall of the first sealing ring 16 fits with the inner wall of the shielding sleeve 15. The rear end of the shielding sleeve 15 is sleeved on the mounting seat 13, and a plurality of second sealing rings 17 are nested in the outer peripheral wall of the mounting seat 13, and the outer wall of the second sealing ring 17 fits with the inner wall of the shielding sleeve 15.

[0028] The first sealing ring 16 can ensure the sealing between the front end of the shielding sleeve 15 and the connecting seat 1, and the second sealing ring 17 can ensure the sealing between the rear end of the shielding sleeve 15 and the mounting seat 13, and the shielding sleeve 15 can be quickly disassembled by only dismounting the end cover 12 from the connecting seat 1, so that the shielding sleeve 15 can be replaced when damaged.

[0029] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A canned motor pump for conveying granular media, characterized in that: The invention comprises a connecting seat (1), wherein the front flange of the connecting seat (1) is connected to the pump housing (2), the rear end of the connecting seat (1) is fixedly connected to the housing (10), a shaft sleeve (3) is rotatably passed through the middle of the connecting seat (1), and a retaining ring (5) is fixedly connected to one end of the shaft sleeve (3) facing the pump housing (2), the retaining ring (5) is located in the pump housing (2), and a plurality of arc grooves (6) are formed on the end surface of the retaining ring (5) facing the shaft sleeve (3), and a rotating shaft (8) is fixedly passed through both the shaft sleeve (3) and the retaining ring (5). One end of the rotating shaft (8) located in the pump housing (2) is fixedly connected to the impeller (18); the outer wall of the rotating shaft (8) located in the casing (10) is fixedly sleeved with the motor rotor (9); the rear end flange of the casing (10) is connected to the end cover (12); the inner wall of the casing (10) is fixedly mounted with the motor stator (11); the motor rotor (9) is located on the inner side of the motor stator (11); and a shielding sleeve (15) is detachably mounted between the motor rotor (9) and the motor stator (11) in the casing (10).

2. A shielded pump for conveying granular media according to claim 1, characterized in that: The outer peripheral wall of the shaft sleeve (3) is provided with a plurality of spiral grooves (4).

3. A canned motor pump for conveying granular media according to claim 1, characterized in that: One end of the shaft sleeve (3) located inside the housing (10) is fixedly connected to a retaining ring (7) via a plurality of screws.

4. A canned motor pump for conveying granular media according to claim 1, characterized in that: A mounting seat (13) is fixedly provided at the middle of one end of the end cover (12) facing the rotating shaft (8), and the rear end of the rotating shaft (8) is rotatably connected to the mounting seat (13) via a rear bearing (14).

5. A shielded pump for conveying granular media according to claim 4, characterized in that: A boss is integrally formed in the middle of the rear end face of the connecting seat (1), the front end of the shielding sleeve (15) is sleeved on the boss, a plurality of first sealing rings (16) are nested in the outer peripheral wall of the boss, and the outer wall of the first sealing ring (16) is in contact with the inner wall of the shielding sleeve (15), the rear end of the shielding sleeve (15) is sleeved on the mounting seat (13), a plurality of second sealing rings (17) are nested in the outer peripheral wall of the mounting seat (13), and the outer wall of the second sealing ring (17) is in contact with the inner wall of the shielding sleeve (15).

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