Novel heavy-load plastic pump

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to a novel heavy-load plastic pump which comprises a pump body, a shell arranged on the outer side of the pump body, a bracket arranged on the outer side of the pump body, a shaft body arranged in the center, an impeller arranged on the shaft body, a pump cover and a mechanical seal. A plurality of first double-end bolts and a plurality of second double-end bolts are arranged on the shell, and an inlet clamping ring used for clamping the shell is arranged on the pump body; a first gasket is arranged between the pump cover and the pump body, the pump cover is located between the pump body and the mechanical seal, and a second hexagon bolt of the pump cover is fixedly connected with the mechanical seal. Leakage points are reduced through the design without a shaft sleeve, the plastic pump body is oppositely clamped in a clamping plate mode, the plastic strength is improved, durability is higher, the probability that the pump is damaged due to reverse rotation is reduced by fixing the three first screws on the anti-rotation nut, only the movable ring and the static ring of the mechanical seal make contact with materials, and it is guaranteed that the spring does not make contact with the materials. And the service life of the mechanical seal is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, and more specifically to a novel heavy-load plastic pump. Background Art

[0002] A centrifugal pump is a pump that transports liquids by the centrifugal force generated by the rotation of the impeller. There are many types of centrifugal pumps, such as vertical, horizontal, single-stage, multi-stage, single-suction, double-suction, and self-priming. A centrifugal pump works by using the centrifugal motion of water caused by the rotation of the impeller. Before starting the water pump, the pump casing and the suction pipe must be filled with water, and then the motor is started so that the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing.

[0003] At present, most centrifugal pumps used in the industrial production field are equipped with a shaft sleeve on the pump shaft, and the shaft sleeve is equipped with a mechanical seal structure or a packing seal structure. These structures use a rubber O-ring between the shaft and the shaft sleeve to achieve the sealing function. After the water pump has been running for a long time, the rubber O-ring will age and the shaft sleeve will also wear. For such phenomena, the rubber O-ring or shaft sleeve of the pump needs to be replaced. During the replacement process, the rust of the shaft sleeve and the shaft will make it very difficult to disassemble, and the disassembly process is very likely to cause damage to the shaft, which greatly increases the maintenance cost; and for the centrifugal pump with a larger pump body, the economic loss will be greater. Utility Model Content

[0004] In order to solve the problems of leakage points on the shaft sleeve of the current centrifugal pump and low service life of the transmission mechanical seal, the utility model provides a novel heavy-duty plastic pump.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions, which mainly include:

[0006] A new type of heavy-duty plastic pump comprises a pump body, an outer shell arranged on the outside of the pump body, a bracket arranged on the outside of the pump body, a shaft body arranged in the center, an impeller arranged on the shaft body, a pump cover and a mechanical seal; the outer shell is provided with a plurality of first stud bolts and a plurality of second stud bolts, and the pump body is provided with an inlet clamping ring for clamping the outer shell; a first gasket is provided between the pump cover and the pump body, the pump cover is located between the pump body and the mechanical seal, and the pump cover is fixedly connected to the mechanical seal by a second hexagonal bolt.

[0007] Preferably, the impeller cooperates with the shaft body through a key, and the impeller is fixedly connected to the shaft body through a plurality of impeller nuts and an anti-rotation nut; the anti-rotation nut has three first screws to fix it to the shaft body.

[0008] Preferably, a bearing cover is provided on the shaft body, a bracket is provided on the outer side of the bearing cover, a plurality of bearings are provided between the bracket and the bearing cover, the bracket is fixedly connected to the outer shell by a third stud bolt, an oil seal is provided between the end of the bracket away from the outer shell and the shaft body, and an oil nipple is provided on the bracket for connecting with the bearing.

[0009] Preferably, the mechanical seal includes a sealing end cover, a sealing static ring, a sealing dynamic ring, a static ring seat, a spring seat and a spring; the pump cover is fixedly connected to the sealing end cover at one end away from the pump body by a second hexagonal bolt, and a water seal retaining ring is fixedly connected to the sealing end cover by a second screw, and a water seal and an O-ring are installed in sequence from the outside to the inside between the sealing end cover and the shaft body; the side of the impeller away from the pump body is fixedly connected to the sealing static ring, and the side of the sealing static ring away from the pump body is rotatably connected to the sealing dynamic ring, a spring seat is fixedly connected to the sealing dynamic ring, a spring is provided between the spring seat and the sealing end cover, the outer side of the spring seat is rotatably connected to the static ring seat, the static ring seat is fixedly connected to the pump cover, and the static ring seat is also fixedly connected to the sealing end cover, and a second gasket is provided between the static ring seat and the pump cover.

[0010] Preferably, a first sealing ring is further included, wherein the first sealing ring is located between the sealing static ring and the impeller, and the first sealing ring is used to prevent the sealing static ring from contacting the impeller.

[0011] Preferably, a second sealing ring is further included, wherein the second sealing ring is located between the sealing dynamic ring and the stationary ring seat, and the second sealing ring is used to prevent the sealing dynamic ring from contacting the stationary ring seat.

[0012] Preferably, a suspension bracket is further included, and the suspension bracket is fixedly connected to an end of the bracket away from the pump body through a third hexagonal bolt.

[0013] It can be seen from the above technical solutions that compared with the prior art, the utility model reduces leakage points through a sleeve-free design, adopts a splint-type clamped plastic pump body to increase the strength of the plastic and make it more durable, and has three first screws fixed on the anti-rotation nut to reduce the probability of pump damage caused by pump reversal. Only the dynamic and static rings of the mechanical seal contact the material to ensure that the spring does not contact the material, thereby increasing the service life of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the mechanical sealing mechanism of the utility model.

[0018] Description of reference numerals: 100-first stud bolt, 101-inlet retaining ring, 102-housing, 103-pump body, 104-second stud bolt, 105-first washer, 201-impeller, 202-impeller nut, 203-anti-rotation nut, 204-first screw, 205-key, 301-third stud bolt, 302-bearing gland, 303-bracket, 304-bearing, 305-oil nozzle, 306-oil seal, 401- Shaft, 501-pump cover, 502-second hexagonal bolt, 601-second screw, 602-sealing end cover, 603-water seal, 604-O-ring, 605-water seal retaining ring, 701-sealing static ring, 702-sealing dynamic ring, 703-static ring seat, 704-second gasket, 705-spring seat, 706-spring, 707-first sealing ring, 708-second sealing ring, 801-suspension bracket, 802-third hexagonal bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] A new heavy-duty plastic pump, such as Figure 1-Figure 3 As shown, it includes a pump body 103, a shell 102 arranged on the outside of the pump body 103, a bracket 303 arranged on the outside of the pump body 103, a shaft body 401 arranged in the center, an impeller 201 arranged on the shaft body 401, a pump cover 501 and a mechanical seal; the shell 102 is provided with a plurality of first stud bolts 100 and a plurality of second stud bolts 104, and the pump body 103 is provided with an inlet clamping ring 101 for clamping the shell 102; a first gasket 105 is provided between the pump cover 501 and the pump body 103, the pump cover 501 is located between the pump body 103 and the mechanical seal, and the pump cover 501 is fixedly connected to the mechanical seal by a second hexagonal bolt 502.

[0022] In order to further optimize the above solution, the impeller 201 cooperates with the shaft 401 through a key 205, and the impeller 201 is fixedly connected to the shaft 401 through multiple impeller nuts 202 and anti-rotation nuts 203; the anti-rotation nut 203 has three first screws 204 to fix it on the shaft 401.

[0023] In order to further optimize the above scheme, a bearing cover 302 is provided on the shaft body 401, a bracket 303 is provided on the outer side of the bearing cover 302, a plurality of bearings 304 are provided between the bracket 303 and the bearing cover 302, the bracket 303 is fixedly connected to the housing 102 by a third stud bolt 301, an oil seal 306 is provided between the end of the bracket 303 away from the housing 102 and the shaft body 401, and an oil nozzle 305 is provided on the bracket 303 for connecting with the bearing 304.

[0024] In order to further optimize the above scheme, the mechanical seal includes a sealing end cover 602, a sealing static ring 701, a sealing dynamic ring 702, a static ring seat 703, a spring seat 705 and a spring 706; the end of the pump cover 501 away from the pump body 103 is fixedly connected to the sealing end cover 602 by a second hexagonal bolt 502, and a water seal retaining ring 605 is fixedly connected to the sealing end cover 602 by a second screw 601, and a water seal 603 and an O-ring 604 are installed between the sealing end cover 602 and the shaft 401 from the outside to the inside; the impeller 201 away from the pump body 103 One side is fixedly connected to the sealing static ring 701, and the side of the sealing static ring 701 away from the pump body 103 is rotatably connected to the sealing dynamic ring 702. A spring seat 705 is fixedly connected to the sealing dynamic ring 702, and a spring 706 is provided between the spring seat 705 and the sealing end cover 602. The outer side of the spring seat 705 is rotatably connected to the static ring seat 703, and the static ring seat 703 is fixedly connected to the pump cover 501. The static ring seat 703 is also fixedly connected to the sealing end cover 602, and a second gasket 704 is provided between the static ring seat 703 and the pump cover 501.

[0025] In order to further optimize the above solution, a first sealing ring 707 is further included. The first sealing ring 707 is located between the sealing static ring 701 and the impeller 201 . The first sealing ring 707 is used to prevent the sealing static ring 701 from contacting the impeller 201 .

[0026] In order to further optimize the above solution, a second sealing ring 708 is also included. The second sealing ring 708 is located between the sealing dynamic ring 702 and the stationary ring seat 703. The second sealing ring 708 is used to prevent the sealing dynamic ring 702 from contacting the stationary ring seat 703.

[0027] In order to further optimize the above solution, a suspension bracket 801 is further included. The suspension bracket 801 is fixedly connected to an end of the bracket 303 away from the pump body 103 through a third hexagonal bolt 802 .

[0028] The present application reduces leakage points through a sleeve-free design, adopts a clamping plate-type plastic pump body 103 to increase the strength of the plastic and make it more durable, and reduces the probability of pump damage due to pump reversal by fixing the anti-rotation nut 203 with three first screws 204. Only the dynamic and static rings of the mechanical seal contact the material, ensuring that the spring 706 does not contact the material, thereby increasing the service life of the mechanical seal.

[0029] The user can also change the magnetic force of the electromagnet 401 by adjusting the resistance of the rheostat 301, thereby ensuring that the pipes 6 with different wall thicknesses will not be separated from the support due to too small magnetic force, or the slider 504 will not damage the inner wall due to too large magnetic force.

[0030] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A new type of heavy-duty plastic pump, characterized in that: The invention comprises a pump body (103), a shell (102) arranged outside the pump body (103), a bracket (303) arranged outside the pump body (103), a shaft body (401) arranged at the center, an impeller (201) arranged on the shaft body (401), a pump cover (501) and a mechanical seal; the shell (102) is provided with a plurality of first stud bolts (100) and a plurality of second stud bolts (104); the pump body (103) is provided with an inlet clamping ring (101) for clamping the shell (102); a first gasket (105) is provided between the pump cover (501) and the pump body (103); the pump cover (501) is located between the pump body (103) and the mechanical seal; the pump cover (501) is fixedly connected to the mechanical seal via a second hexagonal bolt (502).

2. A new type of heavy-duty plastic pump according to claim 1, characterized in that: The impeller (201) cooperates with the shaft (401) via a key (205), and the impeller (201) is fixedly connected to the shaft (401) via a plurality of impeller nuts (202) and an anti-rotation nut (203); the anti-rotation nut (203) is provided with three first screws (204) for fixing it to the shaft (401).

3. A new type of heavy-duty plastic pump according to claim 2, characterized in that: A bearing cover (302) is provided on the shaft body (401), a bracket (303) is provided on the outer side of the bearing cover (302), a plurality of bearings (304) are provided between the bracket (303) and the bearing cover (302), the bracket (303) is fixedly connected to the housing (102) via a third stud bolt (301), an oil seal (306) is provided between the end of the bracket (303) away from the housing (102) and the shaft body (401), and an oil nozzle (305) is provided on the bracket (303) for communicating with the bearing (304).

4. A new type of heavy-duty plastic pump according to claim 3, characterized in that: The mechanical seal comprises a sealing end cover (602), a sealing static ring (701), a sealing dynamic ring (702), a static ring seat (703), a spring seat (705) and a spring (706); the end of the pump cover (501) away from the pump body (103) is fixedly connected to the sealing end cover (602) by a second hexagonal bolt (502); a water seal retaining ring (605) is fixedly connected to the sealing end cover (602) by a second screw (601); a water seal (603) and an O-ring (604) are sequentially installed between the sealing end cover (602) and the shaft (401) from the outside to the inside; the side of the impeller (201) away from the pump body (103) is fixedly connected to the sealing end cover (602) by a second hexagonal bolt (502); The sealing static ring (701) is fixedly connected, and the side of the sealing static ring (701) away from the pump body (103) is rotatably connected to the sealing dynamic ring (702). A spring seat (705) is fixedly connected to the sealing dynamic ring (702), and a spring (706) is provided between the spring seat (705) and the sealing end cover (602). The outer side of the spring seat (705) is rotatably connected to the static ring seat (703), the static ring seat (703) is fixedly connected to the pump cover (501), and the static ring seat (703) is also fixedly connected to the sealing end cover (602). A second gasket (704) is provided between the static ring seat (703) and the pump cover (501).

5. A new type of heavy-duty plastic pump according to claim 4, characterized in that: It also includes a first sealing ring (707), wherein the first sealing ring (707) is located between the sealing static ring (701) and the impeller (201), and the first sealing ring (707) is used to prevent the sealing static ring (701) from contacting the impeller (201).

6. A new type of heavy-duty plastic pump according to claim 4, characterized in that: It also includes a second sealing ring (708), which is located between the sealing dynamic ring (702) and the stationary ring seat (703), and the second sealing ring (708) is used to prevent the sealing dynamic ring (702) from contacting the stationary ring seat (703).

7. A new type of heavy-duty plastic pump according to claim 1, characterized in that: It also includes a suspension bracket (801), wherein the suspension bracket (801) is fixedly connected to an end of the bracket (303) away from the pump body (103) via a third hexagonal bolt (802).

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