CN108005914A - Pumped without reliable float is blocked - Google Patents

Abstract

The invention belongs to mechanical pump technical field, pumped more particularly to one kind without reliable float is blocked, it includes water pump, submersible motor and buoyancy tank, the water pump and submersible motor are installed between buoyancy tank, water pump and submersible motor share a pump shaft, one end of pump shaft passes through submersible motor casing, and the other end of pump shaft is stretched into water pump；The water pump includes the pump housing, pump cover and impeller, and sealing plate is equipped between the pump housing and pump cover, and impeller is installed on pump shaft；Pump shaft between the sealing plate and impeller is equipped with the first mechanical seal, and the second mechanical seal is equipped between pump shaft and pump cover.Compact type of the present invention, it is light-weight, it is easy to float on the water surface；Runner is open, can suck a small amount of air；The combined machine sealing of special designing, compact-sized sealed reliable, it is ensured that it is safe during water pump operation, steady, reduce failure, save cost.

Description

Non-clogging reliable float pump

technical field

The invention belongs to the technical field of mechanical pumps, in particular to a non-blocking and reliable float pump.

Background technique

Since entering the 21st century, the demand for automobiles has been increasing. With the vigorous development of the automobile industry, the automobile painting industry is booming. Various types of water pumps are used in the process of the painting industry. Among them, a specially installed water pump is used in the painting station. The water pump is required to pump away the paint slag suspended on the surface of the liquid. Ordinary submersible pumps or centrifugal pumps are used. In addition to taking away the paint slag, a large amount of liquid has been taken away, which is very impractical, so a submersible pump that can float on the liquid surface is needed to take away the paint slag on the liquid surface and bring in as little liquid as possible. The float pump used in the prior art lies flat on the liquid surface during operation, about half of which is immersed in the liquid surface, and the other half floats on the liquid surface. It has a compact structure and light weight; it can also suck a small amount of air; the paint residue is relatively viscous , so the float pump often fails due to flow channel blockage, overload or mechanical seal leakage. Once a failure occurs, it needs to be repaired or replaced with another spare pump, which is time-consuming and laborious, and will also affect the progress of the entire automobile painting process, which is reliable for the float pump. Performance and service life put forward higher requirements.

Contents of the invention

The object of the present invention is to provide a non-clogging and reliable float pump, which can be installed horizontally and is a water pump floating on the liquid surface. The depth of the water pump immersed in the liquid can be adjusted with the change of the liquid surface; the water pump can suck air It will not affect the stability of operation; the flow channel is wide and free of blockage, and the specially designed combined mechanical seal has a compact structure and reliable sealing, which ensures the safe and stable operation of the pump, reduces failures and saves costs.

According to the technical solution of the present invention, the non-clogging reliable float pump includes a water pump, a submersible motor and a buoyancy tank, the water pump and the submersible motor are installed between the buoyancy tanks, the water pump and the submersible motor share a pump shaft, and the pump shaft One end of the pump shaft passes through the submersible motor casing, and the other end of the pump shaft extends into the water pump; the water pump includes a pump body, a pump cover and an impeller, a sealing plate is arranged between the pump body and the pump cover, and the impeller is installed on the pump shaft; A first mechanical seal is provided on the pump shaft between the sealing plate and the impeller, and a second mechanical seal is provided between the pump shaft and the pump cover; the moving ring of the first mechanical seal is connected with the back cover of the impeller, and the first The stationary ring of the mechanical seal is separated from the second mechanical seal by an elastic circlip through the shaft.

Further, the buoyancy tank is provided with an adjustment rod for adjusting the position of the suction port of the pump body.

Further, the water inlet and outlet channels of the pump body are progressively square.

Further, a first O-ring is provided between the sealing plate and the pump body, a second O-ring is provided between the pump cover and the submersible motor housing, and a second O-ring is provided between the pump cover and the sealing plate. Three O-rings.

Further, the impeller is a semi-open impeller.

Further, the first mechanical seal is made of metal, and the second mechanical seal is made of rubber bellows.

Compared with the prior art, the present invention has the following beneficial effects: unique compact design, light weight, and easy to float on the water surface; the water inlet and outlet channels of the pump body are progressively square, and the channel is very open, which can effectively reduce the pump operation process. The impeller can absorb a small amount of air by drawing on the principle of gas-liquid two-phase flow. It adopts a semi-open structure with a wide flow channel and arc-shaped blades, which is not easy to block; the specially designed combined mechanical seal has a compact structure and reliable sealing. , to ensure the safe and stable operation of the pump, reduce failures, prolong the service life and save costs; adjust the submerged depth of the suction port of the float pump through the adjustment rod to achieve the optimal pumping efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the use of the adjusting rod of the present invention.

Description of reference signs: 1-impeller, 2-pump body, 3-sealing plate, 4-first O-ring, 5-second O-ring, 6-retaining ring for shaft, 7-submersible motor, 8-pump shaft, 9-double row angular contact ball bearing, 10-suction port, 11-pump cover, 12-third O-ring, 13-second mechanical seal, 14-first mechanical seal, 15-floating box, 16-adjustment rod.

Detailed ways

The present invention will be further described below in combination with specific embodiments and accompanying drawings.

As shown in the figure: non-clogging reliable float pump, including water pump, submersible motor 7 and buoyancy tank 15, water pump and submersible motor 7 are installed between two buoyancy tanks 15 on the left and right, the cavity formed by the buoyant tank 15 ensures that the float pump floats On the liquid surface, when the submersible motor 7 satisfies the power requirement, the base size is reduced by one gear, and the length is slightly lengthened, but the radial size of the entire rotor is reduced. The buoyancy tank 15 is also provided with an adjusting rod 16 for adjusting the position of the suction port 10 of the pump body 2 . Suction port 10 is bell mouth shape, strengthens suction range, and buoyancy tank 15 is provided with oblique angle at suction port 10, and the whole is right-angled trapezoid. As shown in Figure 2, the adjusting rod 16 is a screw rod or a structure similar to a screw rod, and the submersion depth of the suction port 10 can be changed by rotating the adjusting rod 16, so as to ensure that the float pump can suck all the paint slag on the surface of the liquid away as little as possible. Take away the liquid, greatly improving work efficiency.

Water pump and submersible motor 7 share a pump shaft 8, and one end of pump shaft 8 passes submersible motor 7 casings, and the other end stretches in the water pump. The water pump includes a pump body 2, a pump cover 11 and an impeller 1. A sealing plate 3 is provided between the pump body 2 and the pump cover 11. The impeller 1 is installed on the pump shaft 8. The pump shaft 8 and the pump cover 11 pass through double-row angular contact balls. The bearing 9 is connected. The impeller 1 is a semi-open impeller with a wide flow channel and arc-shaped blades, which are not easy to be blocked. A first mechanical seal 14 is provided on the pump shaft 8 between the sealing plate 3 and the impeller 1 , and a second mechanical seal 13 is provided between the pump shaft 8 and the pump cover 11 . The sealing plate 3 and the pump cover 11 respectively serve as seats for combined mechanical seals, the axial distance is very small, the axial dimension is reduced, the structure is compact, and the weight is light. The first mechanical seal 14 is made of metal, and the second mechanical seal 13 is made of rubber bellows; the moving ring of the first mechanical seal 14 is connected with the back cover of the impeller 1, which not only saves space, but also runs smoothly; the first mechanical seal The static ring of 14 is separated from the second mechanical seal 13 by a shaft elastic retaining ring 6, and the second mechanical seal 13 is separated from the double row angular contact ball bearing 9 by a retaining ring, which is compact in structure and easy to disassemble , can play the role of double insurance and anti-leakage, greatly reducing the occurrence of float pump failures. The water inlet and outlet channels of the pump body 2 are progressive square, the flow channel is very open, the suction is stronger, and it is not easy to be blocked. A first O-shaped sealing ring 4 is provided between the sealing plate 3 and the pump body 2, a second O-shaped sealing ring 5 is provided between the pump cover 11 and the submersible motor 7 housing, and a second O-ring 5 is provided between the pump cover 11 and the sealing plate 3. There is a third O-ring 12 to ensure the overall sealing.

The installation mode of the present invention is horizontal, and during operation, under the action of centrifugal force, paint slag suspended on the liquid surface and a small part of liquid are transported to the outlet.

Claims (6)

1. The non-clogging reliable float pump is characterized in that it includes a water pump, a submersible motor (7) and a buoyancy tank (15). The water pump and the submersible motor (7) are installed between the buoyancy tanks (15). The water pump and the submersible The motor (7) shares a pump shaft (8), one end of the pump shaft (8) passes through the casing of the submersible motor (7), and the other end of the pump shaft (8) extends into the water pump; the water pump includes a pump body ( 2), the pump cover (11) and the impeller (1), there is a sealing plate (3) between the pump body (2) and the pump cover (11), and the impeller (1) is installed on the pump shaft (8); A first mechanical seal (14) is provided on the pump shaft (8) between the sealing plate (3) and the impeller (1), and a second mechanical seal (13) is provided between the pump shaft (8) and the pump cover (11). ); the moving ring of the first mechanical seal (14) is connected to the back cover of the impeller (1), and the stationary ring of the first mechanical seal (14) and the second mechanical seal (13) are connected by a shaft elastic circlip ( 6) separated. 2. The non-clogging reliable float pump according to claim 1, characterized in that, the buoyancy tank (15) is provided with an adjustment rod (16) for adjusting the position of the suction port (10) of the pump body (2). 3. The non-clogging reliable float pump according to claim 1, characterized in that, the water inlet and outlet channels of the pump body (2) are progressive squares. 4. The non-clogging reliable float pump according to claim 1, characterized in that a first O-ring (4) is provided between the sealing plate (3) and the pump body (2), and the pump cover ( 11) There is a second O-ring (5) between the housing of the submersible motor (7), and a third O-ring (12) is between the pump cover (11) and the sealing plate (3). 5. The non-clogging reliable float pump according to claim 1, characterized in that, the impeller (1) is a semi-open impeller. 6. The non-clogging reliable float pump according to claim 1, characterized in that, the first mechanical seal (14) is made of metal, and the second mechanical seal (13) is made of rubber bellows.