Direct connection type special plastic pump

Abstract

The utility model relates to the technical field of direct connection pumps, in particular to a direct connection type special plastic pump. A direct connection type special plastic pump comprises an impeller, an impeller nut, an anti-rotation chuck, a mechanical sealing component, a shaft body, a support, a pump body, a pump cover and a front cover plate, the shaft body is installed in the middle of the pump body and divided into a shaft body front end and a shaft body rear end, the impeller is installed at the shaft body front end through the impeller nut, the anti-rotation chuck is installed on the impeller nut, and the mechanical sealing component is installed on the pump cover. The pump cover is installed between the front end of the shaft body and the pump body, a mechanical sealing component is installed between the front end of the shaft body and the pump cover, and the rear end of the shaft body is installed in the support. According to the utility model, a bearing box is removed, and the pump and the motor are linked in a bracket linking manner; the number of spare parts is reduced, disassembly is easy, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of direct-connected pumps, and more specifically to a direct-connected special plastic pump. Background Art

[0002] As an efficient, reliable and energy-saving fluid conveying equipment, direct-coupled pumps are widely used in various industrial occasions, such as chemical, pharmaceutical, petroleum, metallurgy, electric power and other fields. In industrial production, the function of direct-coupled pumps is very important, especially in the fields of chemical and petroleum, where they are widely used in the conveying of special media such as highly corrosive, high temperature, high pressure, flammable and explosive media.

[0003] A direct-coupled pump is a centrifugal pump whose main components are a motor, a pump body, an impeller, a mechanical seal, etc. When the motor rotates, the impeller in the pump body also starts to rotate, which generates centrifugal force, sucking the fluid into the pump body faster, and then further compressing the fluid in the pump body through the rotation of the impeller, so that it is discharged to the outlet. The current direct-coupled pump is connected to the motor through multiple sets of bearings, and is subjected to the centrifugal force, inertia and friction generated by the rotating parts. It requires multiple sets of bearing assemblies, which makes disassembly difficult and increases maintenance time. At the same time, the material may contact the spring through the impeller, causing the spring to be blocked and the pump body to stop working.

[0004] Therefore, providing a direct-connected special plastic pump with a simple structure, easy maintenance, and reduced maintenance time is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a direct-connected special plastic pump which is easy to maintain, has a reasonable design, is convenient to install, and has a high maintenance efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions, which mainly include:

[0007] A direct-connected special plastic pump comprises an impeller, an impeller nut, an anti-rotation chuck, a mechanical sealing component, a shaft, a bracket, a pump body, a pump cover and a front cover plate, wherein a shaft is installed in the middle of the pump body, and the shaft is divided into a shaft front end and a shaft rear end, the impeller is installed at the shaft front end through the impeller nut, an anti-rotation chuck is installed on the impeller nut, the pump cover is installed between the shaft front end and the pump body, a mechanical sealing component is installed between the shaft front end and the pump cover, and the shaft rear end is installed inside the bracket.

[0008] Preferably, the mechanical sealing component includes a dynamic ring seat, a static ring seat, a spring, a spring seat, a sleeve, a seal, a sealing end cover, a static ring and a dynamic ring, the front end of the shaft body is wrapped with a sleeve on the outside, the sealing end cover is installed on the pump cover by bolts, a seal is provided between the sleeve and the sealing end cover, a spring seat is provided between the sleeve and the pump cover, a static ring seat is provided between the spring seat and the pump cover, a spring is provided between the spring seat and the static ring seat, a dynamic ring seat is provided between the static ring seat and the impeller, a static ring is provided between the static ring seat and the dynamic ring seat, and a dynamic ring is provided between the dynamic ring seat and the impeller.

[0009] Preferably, the impeller adopts double-layer back blades to reduce the material entering the sealing cavity, thereby increasing the service life of the seal.

[0010] Preferably, the pump body is surrounded by all plastics, with a wall thickness of 40 mm, which increases the service life.

[0011] Preferably, the front cover plate is mounted on the pump body by bolts, which is convenient for on-site maintenance, and the wall thickness of up to 40 mm increases the service life.

[0012] It can be seen from the above technical solution that compared with the prior art, the utility model eliminates the traditional bearing box and adopts a bracket connection method to connect the pump and the motor, which reduces the number of spare parts, is simple to disassemble, and is easy to maintain, shortening the maintenance time. During the use of the pump, only the dynamic and static rings of the mechanical seal contact the material, and the spring does not contact the material, which solves the problem of the spring not working due to the material contacting the spring. The structure adds an anti-rotation nut to the pump impeller to prevent the main nut from loosening when the pump is reversed, reducing the risk of damage to the impeller and seal caused by pump reversal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the mechanical sealing component of the utility model.

[0016] Explanation of the reference numerals: 1-impeller nut, 2-anti-rotation chuck, 3-impeller, 4-moving ring seat, 5-stationary ring seat, 6-spring, 7-spring seat, 8-shaft body, 801-front end of the shaft body, 802-rear end of the shaft body, 9-bracket, 10-sleeve, 11-seal, 12-sealing end cover, 13-stationary ring, 14-pump cover, 15-moving ring, 16-pump body, 17-front cover. DETAILED DESCRIPTION

[0017] 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.

[0018] Example

[0019] A direct-connected special plastic pump, such as Figure 1 to Figure 2 As shown, it includes an impeller 3, an impeller nut 1, an anti-rotation chuck 2, a mechanical sealing component, a shaft 8, a bracket 9, a pump body 16, a pump cover 14 and a front cover plate 17, wherein the shaft 8 is installed in the middle of the pump body 16, and the shaft 8 is divided into a shaft front end 801 and a shaft rear end 802, the impeller 3 is installed on the shaft front end 801 through the impeller nut 1, the anti-rotation chuck 2 is installed on the impeller nut 1, the pump cover 14 is installed between the shaft front end 801 and the pump body 16, a mechanical sealing component is installed between the shaft front end 801 and the pump cover 14, and the shaft rear end 802 is installed inside the bracket 9.

[0020] In order to further optimize the above scheme, the mechanical sealing component includes a dynamic ring seat 4, a static ring seat 5, a spring 6, a spring seat 7, a sleeve 10, a seal 11, a sealing end cover 12, a static ring 13 and a dynamic ring 15. The front end 801 of the shaft body is wrapped with a sleeve 10 on the outside, and the sealing end cover 12 is installed on the pump cover 14 by bolts. A seal 11 is provided between the sleeve 10 and the sealing end cover 12, a spring seat 7 is provided between the sleeve 10 and the pump cover 14, a static ring seat 5 is provided between the spring seat 7 and the pump cover 14, a spring 6 is provided between the spring seat 7 and the static ring seat 5, a dynamic ring seat 4 is provided between the static ring seat 5 and the impeller 3, a static ring 13 is provided between the static ring seat 5 and the dynamic ring seat 4, and a dynamic ring 15 is provided between the dynamic ring seat 4 and the impeller 3.

[0021] In order to further optimize the above solution, the impeller 3 adopts double-layer back blades to reduce the material entering the sealing cavity, thereby increasing the service life of the seal.

[0022] In order to further optimize the above solution, the pump body 16 is surrounded by all plastics, with a wall thickness of 40 mm, which increases the service life.

[0023] In order to further optimize the above solution, the front cover plate 17 is installed on the pump body 16 by bolts, which is convenient for on-site maintenance, and the wall thickness is as high as 40 mm to increase the service life.

[0024] In order to further optimize the above solution, the present application removes the traditional bearings and bearing boxes, reduces the weight of the pump body 8, and uses the bracket 9 to connect the pump and the motor, thereby reducing the number of spare parts and facilitating maintenance.

[0025] 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.

[0026] 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 direct-connected special plastic pump, characterized in that: It includes an impeller, an impeller nut, an anti-rotation chuck, a mechanical sealing component, a shaft, a bracket, a pump body, a pump cover and a front cover plate. The shaft is installed in the middle of the pump body. The shaft is divided into a front end and a rear end of the shaft. The impeller is installed at the front end of the shaft through the impeller nut. The anti-rotation chuck is installed on the impeller nut. The pump cover is installed between the front end of the shaft and the pump body. A mechanical sealing component is installed between the front end of the shaft and the pump cover. The rear end of the shaft is installed inside the bracket.

2. A direct-connected special plastic pump according to claim 1, characterized in that: The mechanical sealing component includes a dynamic ring seat, a static ring seat, a spring, a spring seat, a sleeve, a seal, a sealing end cover, a static ring and a dynamic ring. The front end of the shaft body is wrapped with a sleeve on the outside. The sealing end cover is installed on the pump cover by bolts. A seal is provided between the sleeve and the sealing end cover. A spring seat is provided between the sleeve and the pump cover. A static ring seat is provided between the spring seat and the pump cover. A spring is provided between the spring seat and the static ring seat. A dynamic ring seat is provided between the static ring seat and the impeller. A static ring is provided between the static ring seat and the dynamic ring seat. A dynamic ring is provided between the dynamic ring seat and the impeller.

3. A direct-connected special plastic pump according to claim 1, characterized in that: The impeller adopts double-layer back blades.

4. A direct-connected special plastic pump according to claim 1, characterized in that: The pump body is surrounded by all plastics and has a wall thickness of 40 mm.

5. A direct-connected special plastic pump according to claim 1, characterized in that: The front cover plate is mounted on the pump body by bolts, and has a wall thickness of 40 mm.

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