Double-pump external sewage lifting equipment

Abstract

The utility model discloses double-pump external sewage lifting equipment which comprises two water collecting tanks, dry type submersible sewage pumps located outside the water collecting tanks, and a water outlet flange short pipe, a water outlet check valve, a water pump water outlet valve and a water outlet collecting pipe which are connected in sequence, the water outlet flange short pipe is connected with the dry type submersible sewage pumps, and the number of the water collecting tanks is two. And two groups of dry submersible sewage pumps are correspondingly arranged. The dry-type submersible sewage pump is connected with a water outlet of the water collecting tank, and a backwashing pipe is arranged between the water outlet flange short pipe and the water collecting tank in a communicating manner. The external dry-type submersible sewage pump is adopted, sewage cannot pollute the surface of the water pump during operation, only front and rear valves of the water pump need to be closed during maintenance, the service life of the water pump is prolonged, and operation of maintenance personnel is facilitated. And a backwashing pipe is arranged to flush the inside of the water tank during equipment operation, so that long-term deposition of impurities at the bottom of the water tank is avoided. The two water collecting tanks and the two dry-type submersible sewage pumps are arranged, one water collecting tank is used, and the other dry-type submersible sewage pump is standby, so that equipment use is not affected during troubleshooting.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage lifting equipment, and more specifically, to a double-pump external sewage lifting equipment. Background Art

[0002] Whether it is a basement or an underground commercial complex, a drainage system is required. However, the drainage pipes of general underground spaces are mostly lower than the municipal sewage pipes, so the basement space cannot ignore the drainage problem like the above-ground buildings, and can rely on the gravity of sewage to flow into the sewage pipe. For the sewage in the underground space, another sewage discharge method is needed to solve it - pressure sewage discharge method.

[0003] In the pressure drainage mode, the integrated sewage lifting equipment is the main equipment for underground space drainage. It is fully automatic, does not require personnel on duty, and has good airtightness, which will not cause secondary pollution to the basement environment. Compared with the traditional pressure drainage mode, it also occupies a smaller area and does not require more civil engineering to build a sump.

[0004] The sewage lifting equipment on the market today generally adopts a stainless steel closed box with one or two submersible sewage pumps built in. The sewage enters the box through the water inlet of the closed box. When the sewage accumulates to a certain height in the box, the built-in submersible sewage pump starts to discharge the sewage through the sewage pipe connected to the water outlet of the closed box.

[0005] Since sewage generally contains a lot of solid debris, there is a high probability that it will be entangled on the rotor parts of the sewage pump or blocked in the internal flow channel of the sewage pump, causing damage to the sewage pump. When repairing this type of built-in sewage pump, not only does it require opening the sealed water tank, which causes odor to escape, but the water pump is immersed in sewage for a long time, and there will be certain stains on the outer surface of the pump casing, which causes great inconvenience to the maintenance personnel. In addition, because the box is made of stainless steel, the built-in submersible drainage pump will resonate with the box when it is running, thereby generating a lot of noise and affecting the surrounding environment. Utility Model Content

[0006] The purpose of the utility model is to provide a double-pump external sewage lifting equipment to solve the technical problems existing in the above-mentioned background technology.

[0007] The technical solution of the utility model provides a dual-pump external sewage lifting equipment, including a water collecting tank, a dry submersible sewage pump located outside the water collecting tank, and a water outlet flange short pipe, a water outlet check valve, a water pump outlet valve and a water outlet manifold connected in sequence, the water outlet flange short pipe and the dry submersible sewage pump, the water collecting tank is provided with two, and the dry submersible sewage pump is correspondingly provided in two groups;

[0008] The dry submersible sewage pump is connected to the water outlet of the water collecting tank, and a backwash pipe is provided between the water outlet flange short pipe and the water collecting tank.

[0009] In a preferred embodiment, a ventilation connecting pipe and a connecting water pipe are connected between the two water collecting tanks, and a connecting valve is provided on the connecting water pipe.

[0010] In a preferred embodiment, water inlets are provided on the top and sides of the water collecting tank.

[0011] In a preferred embodiment, an ultrasonic liquid level meter is provided on the water collecting tank.

[0012] In a preferred embodiment, a box cover and a vent are provided on the top of the water collecting box, and a drain port is provided on one side.

[0013] In a preferred embodiment, the flow diameter of the water pump flow channel of the dry submersible sewage pump is ≥80 mm.

[0014] The beneficial effects of the technical solution of the utility model are:

[0015] This equipment uses an external dry submersible sewage pump. During operation, sewage will not contaminate the surface of the pump. During maintenance, you only need to close the valves before and after the pump, which increases the life of the pump and facilitates maintenance personnel to operate. A backwash pipe is set up to flush the inside of the water tank while the equipment is running to prevent debris from being deposited at the bottom of the water tank for a long time. Two water collection tanks and two dry submersible sewage pumps are set up, one for use and one for backup, so that the use of the equipment will not be affected during fault maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a side view of the utility model.

[0017] Figure 2 This is a top view of the utility model.

[0018] Figure 3 It is a partial structural sectional view of the dry submersible sewage pump of the utility model.

[0019] Explanation of the reference numerals: 1 water collecting tank, 2 dry submersible sewage pump, 3 outlet flange short pipe, 4 outlet check valve, 5 water pump outlet valve, 6 outlet manifold, 7 backwash pipe, 8 air-permeable connecting pipe, 9 connecting water pipe, 10 connecting valve, 11 water inlet, 12 ultrasonic level meter, 13 tank cover, 14 drain port, 15 air vent. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the sake of illustration and convenience of description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0021] like Figure 1-3 As shown, the technical solution of the utility model provides a dual-pump external sewage lifting equipment, including a water collecting tank 1, a dry submersible sewage pump 2 located outside the water collecting tank 1, and a water outlet flange short pipe 3, a water outlet check valve 4, a water pump outlet valve 5 and a water outlet manifold 6 connected in sequence, the water outlet flange short pipe 3 and the dry submersible sewage pump 2, the water collecting tank 1 is provided with two, and the dry submersible sewage pump 2 is correspondingly provided in two groups. The dry submersible sewage pump 2 is connected to the water outlet of the water collecting tank 1, and a backwash pipe 7 is provided between the water outlet flange short pipe 3 and the water collecting tank 1.

[0022] This equipment uses an external dry submersible sewage pump 2. During operation, sewage will not contaminate the surface of the pump. During maintenance, it is only necessary to close the valves before and after the pump, which increases the life of the pump and facilitates maintenance personnel to operate. A backwash pipe 7 is provided to flush the inside of the water tank while the equipment is running to prevent debris from being deposited at the bottom of the water tank for a long time. Two water collecting tanks 1 and two dry submersible sewage pumps 2 are provided, one for use and one for backup, so that the use of the equipment is not affected during fault maintenance. The water collecting tank 1 is made of high-density polyethylene (HDPE), and the dry submersible sewage pump 2 will not resonate with it during operation, reducing the operating noise of the equipment.

[0023] A ventilation connecting pipe 8 and a connecting water pipe 9 are connected between the two water collecting boxes 1 , and a connecting valve 10 is provided on the connecting water pipe 9 .

[0024] The water collecting box 1 is provided with water inlets 11 on the top and sides thereof, and the installation is facilitated by arranging the water inlets 11 at different positions.

[0025] The water collecting tank 1 is provided with an ultrasonic level meter 12. Compared with the conventional float which can only set a fixed start-stop pump level, the ultrasonic level meter 12 can accurately detect the liquid level in the closed water tank and transmit it to the intelligent control system, so that the operator can modify the start-stop pump level and the alarm level at any time according to the needs.

[0026] The water collecting box 1 is also provided with a box cover 13 and a vent 15 on the top, and a drain port 14 on one side. When the box cover is opened, the inside of the water collecting box 1 can be inspected through the box cover 13 .

[0027] The flow diameter of the water pump channel of the dry submersible sewage pump 2 is ≥80mm, and the sewage will not contact the impeller when discharged through the water pump. The extra-wide flow channel can ensure the smooth passage of debris in the sewage, while completely avoiding the possibility of debris being entangled on the impeller, achieving the effect of no blockage and no cleaning required.

[0028] Sewage enters the water collecting tank 1 directly through the water inlet 11 of the water collecting tank 1. When the ultrasonic level meter 12 senses that the liquid level in the water collecting tank 1 reaches the pump starting level, the dry submersible sewage pump 2 starts, and the sewage is discharged from the water outlet of the water collecting tank 1 through the non-blocking dry submersible sewage pump 2, the outlet flange short pipe 3, the outlet check valve 4, the water pump outlet valve 5, and the outlet manifold 6 into the municipal drainage system. When the ultrasonic level meter 12 senses that the liquid level reaches the pump stop level, the dry submersible sewage pump 2 stops working. When the dry submersible sewage pump 2 starts, a small part of the sewage passes through the outlet flange short pipe 3 and enters the closed water collecting tank 1 through the backwash pipe 7 to flush the inside of the water tank. In addition to the above process, the sewage no longer passes through other components.

[0029] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A dual-pump external sewage lifting equipment, characterized in that: It includes a water collecting tank, a dry submersible sewage pump located outside the water collecting tank, and a water outlet flange short pipe, a water outlet check valve, a water pump outlet valve and a water outlet manifold which are sequentially connected and arranged, the water outlet flange short pipe and the dry submersible sewage pump, the water collecting tank is provided with two, and the dry submersible sewage pump is correspondingly arranged in two groups; The dry submersible sewage pump is connected to the water outlet of the water collecting tank, and a backwash pipe is provided between the water outlet flange short pipe and the water collecting tank.

2. The double-pump external sewage lifting equipment according to claim 1 is characterized in that: A ventilating connecting pipe and a connecting water pipe are connected between the two water collecting tanks, and a connecting valve is arranged on the connecting water pipe.

3. The double-pump external sewage lifting equipment according to claim 1 is characterized in that: The top and side of the water collecting tank are both provided with water inlets.

4. The double-pump external sewage lifting equipment according to claim 1 is characterized in that: The water collecting tank is provided with an ultrasonic liquid level meter.

5. The double-pump external sewage lifting equipment according to claim 1 is characterized in that: A box cover and a vent are also provided on the top of the water collecting box, and a water drain port is provided on one side.

6. The double-pump external sewage lifting equipment according to claim 1 is characterized in that: The flow diameter of the water pump flow channel of the dry submersible sewage pump is ≥80mm.

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