Overhanging sanitary double screw pump

Abstract

The utility model discloses a cantilever type sanitary double screw pump, including the pump body, the pump head is arranged to one side of pump body, and the gear box is arranged to the other side, and the pivot is through setting between the pump head, pump body and gear box, the pump head, pump body and gear box can be disassembled and assembled, and the mechanical seal is arranged in the pump body, the gear is arranged in the gear box, the pump head includes the rotor cavity and the pump cavity of disassembled and assembled, the rotor is arranged in the rotor cavity, and the pump cover can be disassembled and assembled to one side of rotor cavity, and the import flange is arranged on the pump cover, the pump cavity is through with the rotor cavity, and the export flange is arranged to one side wall of pump cavity. The screw pump structure of the application is compact (small in volume), adopts three -section type design, and is convenient for the disassembly and cleaning of parts, the outer wall four sides of pump body are all set up mounting assembly, allow installing screw pump from four directions, can according to the actual situation of the scene flexible adjustment import and export direction, reduced the complex pipeline conversion demand.

Description

Technical Field

[0001] This utility model belongs to the field of screw pump applications, specifically relating to a cantilever sanitary twin screw pump. Background Technology

[0002] A rotary pump is a pump that increases the energy of a liquid by changing its working volume through the relative motion between the rotor and the pump body. Rotary pumps include gear pumps, screw pumps, Roots pumps, flexible impeller pumps, vane pumps, and rotary piston pumps. Their working principle is generally based on the suction generated at the inlet by two synchronously rotating rotors in opposite directions, which draws in the material to be transported.

[0003] A screw pump is an air extraction device that uses a pair of screws rotating synchronously at high speed in opposite directions within a pump casing to generate suction and exhaust. Inside the screw pump, both ends of the screws are mounted on bearing housings, which are fixed to the pump casing, sealing both ends of the casing. Depending on the application, some screw pumps may transport corrosive substances. Conventional bearing housings are made of cast iron, which can be corroded by corrosive substances, leading to a reduction in the screw pump's lifespan.

[0004] In the food and pharmaceutical industries, which have high hygiene requirements, pumps, pipelines, and pipeline accessories used for conveying materials must be thoroughly cleaned after the system stops conveying materials. Existing screw pumps are complex to disassemble and assemble, which is not conducive to cleaning the two concave parts of the pump head cover and the mechanical seal parts inside the pump body. During long-term operation, residual materials will accumulate, leading to an increase in bacteria and other microorganisms, which cannot meet the hygiene requirements. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a cantilevered sanitary twin-screw pump, which solves the problem of difficult cleaning of the screw pump interior through a detachable three-section design. The specific technical solution of this utility model to achieve this objective is as follows:

[0006] A cantilevered sanitary twin-screw pump includes a pump body, a pump head on one side and a gearbox on the other side, a rotating shaft passing through the pump head, pump body and gearbox, the pump head, pump body and gearbox being detachably assembled, a mechanical seal being installed in the pump body, and a gear being installed in the gearbox; the pump head includes a detachably assembled rotor cavity and a pump cavity, a rotor being installed in the rotor cavity, and a pump cover being detachably assembled on one side of the rotor cavity, with an inlet flange on the pump cover; the pump cavity communicates with the rotor cavity, and an outlet flange is installed on one side wall of the pump cavity.

[0007] Furthermore, the rotor includes a driving rotor and a driven rotor, both of which are screw rotors and mesh with each other.

[0008] Furthermore, two bearings are fitted onto the rotor, and the two bearings are mounted on bearing seats inside the pump body. One bearing is connected to the mechanical seal, and the other bearing is connected to the gear.

[0009] Furthermore, the bearing is a tapered roller bearing.

[0010] Furthermore, the gear is a helical gear, and the gearbox has a detachable rear cover on the side away from the pump body.

[0011] Furthermore, mounting components are provided on all four sides of the outer wall of the pump body.

[0012] Furthermore, the mounting assembly is a flange assembly or a threaded assembly.

[0013] Furthermore, a flange assembly is provided on at least one side of the outer wall of the pump body.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) The screw pump of this application has a compact structure (small size), adopts a three-section design, which facilitates the disassembly and cleaning of parts, has a high hygiene level (few dead corners), high volumetric efficiency, low noise, low vibration, no pulse when conveying materials, high conveying pressure (2.5MPa), no damage when conveying granular materials, wide speed range (0-2900), and wide flow range.

[0016] (2) The pump body of this application is equipped with installation components on all four sides of the outer wall, which allows the screw pump to be installed from four directions. The direction of the inlet and outlet can be flexibly adjusted according to the actual site conditions, reducing the need for complex pipeline conversion. Users can quickly change the inlet and outlet connection form of the pump (such as flange connection, threaded connection, etc.) according to actual needs without replacing the entire pump body, which can adapt to different application scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the screw pump of this utility model;

[0018] Figure 2 This is a front view of the screw pump of this utility model;

[0019] Figure 3 This utility model Figure 2 AA sectional view.

[0020] In the diagram: 1-Pump head, 2-Pump body, 3-Gearbox, 4-Shaft, 5-Rotor, 6-Mechanical seal, 7-Pump cover, 8-Inlet flange, 9-Outlet flange, 10-Bearing, 11-Rotor cavity, 12-Pump cavity, 13-Gear, 14-Rear cover, 15-Flange. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] like Figures 1-3 As shown, a cantilevered sanitary twin-screw pump includes a pump body 2, a pump head 1 on one side of the pump body 2, and a gearbox 3 on the other side. A rotating shaft 4 passes through the pump head 1, pump body 2, and gearbox 3. The pump head 1, pump body 2, and gearbox 3 are detachably assembled. A mechanical seal 6 is installed inside the pump body 2. A gear 13 is installed inside the gearbox 3. The pump head 1 includes a detachably assembled rotor cavity 11 and a pump cavity 12. A rotor 5 is installed inside the rotor cavity 11, and a pump cover 7 is detachably assembled on one side of the rotor cavity 11. An inlet flange 8 is installed on the pump cover 7. The pump cavity 12 communicates with the rotor cavity 11, and an outlet flange 9 is installed on one side wall of the pump cavity 12. The gear 13 is a helical gear, and a rear cover 14 is detachably assembled on the side of the gearbox 3 away from the pump body 2.

[0023] It is understood that the screw pump of this application adopts a three-section design (detachable assembly of pump head 1, pump body 2 and gearbox 3), and the pump head 1 is designed as a detachable assembly of rotor cavity 11 and pump cavity 12, which facilitates cleaning of the inside of the screw pump and helps to clean the dead corners inside the pump.

[0024] In this application, rotor 5 includes a driving rotor and a driven rotor, both of which are screw rotors and mesh with each other. Two bearings 10 are symmetrically mounted on the driving and driven rotors, and these bearings 10 are housed in bearing seats within the pump body 2. One bearing 10 is mated to the mechanical seal 6, and the other bearing 10 is mated to the gear 13. The bearings 10 are tapered roller bearings. The back-to-back structure of the two tapered roller bearings on the driving / driven rotors increases the cantilever shaft size, allowing it to withstand greater axial and radial loads.

[0025] In addition, mounting components are installed on all four sides of the outer wall of pump body 2. These mounting components are either flange or threaded assemblies. At least one side of the outer wall of pump body 2 has a flange assembly. The design of the mounting components on the outer wall of pump body 2 allows for installation or connection from four directions, and the inlet and outlet directions can be flexibly adjusted according to actual site conditions, reducing the need for complex piping conversions.

[0026] In one specific embodiment, the flange assembly can be designed as a flange bracket 15. The threaded assembly can be designed as a threaded hole that mates with bolts, facilitating the installation and fixing of the screw pump.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cantilevered sanitary twin-screw pump, comprising a pump body (2), wherein a pump head (1) is disposed on one side of the pump body (2) and a gearbox (3) is disposed on the other side, and a rotating shaft (4) is disposed through the pump head (1), the pump body (2) and the gearbox (3), characterized in that, The pump head (1), pump body (2) and gearbox (3) are detachably assembled. A mechanical seal (6) is provided in the pump body (2). A gear (13) is provided in the gearbox (3). The pump head (1) includes a detachably assembled rotor cavity (11) and a pump cavity (12). A rotor (5) is provided in the rotor cavity (11), and a pump cover (7) is detachably assembled on one side of the rotor cavity (11). An inlet flange (8) is provided on the pump cover (7). The pump cavity (12) is connected to the rotor cavity (11), and an outlet flange (9) is provided on one side wall of the pump cavity (12).

2. The cantilevered sanitary twin-screw pump according to claim 1, characterized in that, The rotor (5) includes a driving rotor and a driven rotor, both of which are screw rotors and mesh with each other.

3. The cantilevered sanitary twin-screw pump according to claim 1, characterized in that, Two bearings (10) are fitted on the rotor (5). The two bearings (10) are set on the bearing seats inside the pump body (2). One bearing (10) is connected to the mechanical seal and the other bearing (10) is connected to the gear (13).

4. A cantilevered sanitary twin-screw pump according to claim 3, characterized in that, The bearing (10) is a tapered roller bearing.

5. A cantilevered sanitary twin-screw pump according to claim 1, characterized in that, The gear (13) is a helical gear, and the gearbox (3) has a detachable rear cover (14) on the side away from the pump body (2).

6. A cantilevered sanitary twin-screw pump according to any one of claims 1-5, characterized in that, The pump body (2) has mounting components installed on all four sides of its outer wall.

7. A cantilevered sanitary twin-screw pump according to claim 6, characterized in that, The mounting assembly is a flange assembly or a threaded assembly.

8. A cantilevered sanitary twin-screw pump according to claim 7, characterized in that, A flange assembly is provided on at least one side of the outer wall of the pump body (2).

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