Single-stage centrifugal fire pump

Abstract

The utility model relates to the field of water pumps and discloses a single-stage centrifugal fire pump which comprises a pump body, the water inlet end of the pump body is fixedly communicated with a water inlet pipe, a first valve is installed in the middle of the water inlet pipe, and the other end of the water inlet pipe extends forwards and is fixedly communicated with a first connecting pipe through a flange. The middle of the top of the first connecting pipe is fixedly communicated with a silt discharging pipe, a second valve is installed on the upper portion of the silt discharging pipe, the inner wall of the first connecting pipe is fixedly connected with a filter screen, the filter screen is located on the rear side of the silt discharging pipe, and the bottom of the filter screen inclines forwards and downwards. The other two ends of the three-way pipe are fixedly communicated with one end of a second connecting pipe and one end of a standby water conveying pipe through flanges respectively, and the other end of the second connecting pipe is fixedly communicated with one end of a main water conveying pipe through a flange. By arranging the standby water conveying pipe, a reliable emergency alternative scheme is provided for the main water conveying pipe, it is ensured that water can be continuously supplied when the main water conveying pipe goes wrong, and the stability and reliability of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water pump, specifically is a single stage centrifugal fire pump. BACKGROUND

[0002] Centrifugal pumps are widely used in various fields, including industry, agriculture, construction, municipal administration, etc., in the industrial field, centrifugal pumps are often used for conveying various liquids, such as clean water, sewage, chemical liquids, etc., in the field of municipal water supply, fire fighting, etc., centrifugal pumps also play an important role.

[0003] At present, the centrifugal pump is easy to be blocked or damaged when conveying liquid containing impurities or silt, in addition, the water outlet end of the centrifugal water pump is mostly connected with a water outlet pipe, and cannot extinguish fire at multiple fire points at the same time. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the above-mentioned shortcomings, the utility model provides a single stage centrifugal fire pump.

[0005] The utility model takes the technical scheme that:

[0006] A single stage centrifugal fire pump, including the pump body, the water inlet end of the pump body is fixedly connected with the water inlet pipe, the water inlet pipe is installed valve one in the middle part, the other end of the water inlet pipe extends forward, the other end of the water inlet pipe is fixedly connected with the connecting pipe one through the flange, the top of the connecting pipe one is fixedly connected with the silt discharge pipe, valve two is installed on the upper part of the silt discharge pipe, the inner wall of the connecting pipe one is fixedly connected with the filter screen, the filter screen is located at the bottom of the silt discharge pipe, the upper part of the filter screen is inclined to the bottom wall of the connecting pipe one, the water outlet end of the pump body is fixedly connected with the bottom end of the three-way pipe through the flange, the other two ends of the three-way pipe are fixedly connected with the connecting pipe two and the one end of the standby water conveying pipe through the flange respectively, the other end of the connecting pipe two is fixedly connected with the one end of the main water conveying pipe through the flange, the other end of the main water conveying pipe is fixedly connected with the one end of the short connecting pipe one through the flange, the other end of the short connecting pipe one is fixedly connected with the water outlet pipe one through the flange, valve three is installed in the short connecting pipe one, the other end of the standby water conveying pipe is fixedly connected with the one end of the short connecting pipe two through the flange, the other end of the short connecting pipe two is fixedly connected with the water outlet pipe two through the flange, valve five is installed in the short connecting pipe two.

[0007] The top of the connecting pipe two is fixedly connected with the external connecting pipe, and valve four is installed on the upper part of the external connecting pipe.

[0008] The utility model has the advantages of:

[0009] The filter screen in the connecting pipe one effectively filters the impurities and silt in the water, keeps the water pump and the pipeline system clean, at the same time, the design of the silt discharge pipe facilitates regular pollution discharge and prolongs the service life of the equipment.

[0010] The setting of the standby water supply pipe provides a reliable emergency replacement scheme for the main water supply pipe, ensures that water supply can be continuously provided when the main water supply pipe has problems, and improves the stability and reliability of the system.

[0011] The entire pipeline system is connected by flanges, facilitating installation, disassembly and maintenance, and reducing maintenance cost and time. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of the utility model;

[0013] Figure 2 is Figure 1 a front view of the utility model;

[0014] Figure 3 is Figure 2 a sectional view of the utility model at A-A;

[0015] Figure 4 is Figure 1 a left view of the utility model;

[0016] Figure 5 is Figure 4 a sectional view of the utility model at B-B.

[0017] In all the drawings, the specific reference signs are as follows: 1, pump body; 2, water inlet pipe; 3, valve one; 4, connecting pipe one; 5, desilting pipe; 6, valve two; 7, filter screen; 8, tee pipe; 9, connecting pipe two; 10, main water supply pipe; 11, short connecting pipe one; 12, water outlet pipe one; 13, valve three; 14, external connecting pipe; 15, valve four; 16, standby water supply pipe; 17, short connecting pipe two; 18, water outlet pipe two; 19, valve five. DETAILED DESCRIPTION

[0018] As Figures 1-5The utility model discloses a single-stage centrifugal fire pump, including the pump body 1, the water inlet end fixed communication water inlet pipe 2 of pump body 1, the middle installation valve 1 3 in water inlet pipe 2, the other end of water inlet pipe 2 extends forward, the other end of water inlet pipe 2 is fixed communication connecting pipe 1 4 through flange, the top middle fixed communication of connecting pipe 1 4 is muddy pipe 5, the upper installation valve 2 6 of muddy pipe 5, the inner wall fixed connection filter screen 7 of connecting pipe 1 4, filter screen 7 is located at the bottom of muddy pipe 5, the upper portion of filter screen 7 is inclined to the bottom wall of connecting pipe 1 4, the water outlet end of pump body 1 is fixed communication the bottom end of three-way pipe 8 through flange, the other two ends of three-way pipe 8 are fixed communication connecting pipe 2 9 and the one end of spare water pipe 16 respectively through flange, the other end of connecting pipe 2 9 is fixed communication the one end of main water pipe 10 through flange, the other end of main water pipe 10 is fixed communication the one end of short circuit pipe 1 1 through flange, the other end of short circuit pipe 1 1 is fixed communication water outlet pipe 1 2 through flange, installs valve 3 13 in short circuit pipe 1 1, the other end of spare water pipe 16 is fixed communication the one end of short circuit pipe 2 17 through flange, the other end of short circuit pipe 2 17 is fixed communication water outlet pipe 2 18 through flange, installs valve 5 19 in short circuit pipe 2 17.

[0019] The top middle fixed communication of connecting pipe 2 9 is external connection pipe 14, installs valve 4 15 on the upper portion of external connection pipe 14.

[0020] Water outlet pipe 1 2 and water outlet pipe 2 18 are connected to fire hoses, and external connection pipe 14 is connected to a fire cannon.

[0021] When the pump needs to be started, first ensure that valve 1 3 is in an open state to allow water to flow from an external water source into the pump body 1 through the water inlet pipe 2.

[0022] The water flows into the water inlet pipe 2 through the connecting pipe 1 4, at which time, impurities and sludge in the water are intercepted by the filter screen 7.

[0023] As the pump operates, water is drawn in through the water inlet end of the pump body 1 and is expelled from the water outlet end after being subjected to centrifugal action.

[0024] When it is found that a large amount of impurities or sludge has accumulated on the filter screen 7, valve 1 3 can be closed, and valve 2 6 can be opened to use the pressure in the pipeline to discharge the impurities and sludge in the muddy pipe 5.

[0025] The filtered clean water flows out of the water outlet end of the pump body 1 and into the three-way pipe 8.

[0026] At the three-way pipe 8, the water is divided into the connecting pipe 2 9 and the spare water pipe 16, but generally, valve 5 19 remains closed or open, the water flows through the connecting pipe 2 9 and the spare water pipe 16, and the water is finally delivered to the water outlet pipe 2 18 and the water pipe 1 2, during which process, valve 3 13 and valve 5 19 can be opened or closed as needed to adjust the flow.

[0027] If it is necessary to connect external fire monitors, the external connection pipe 14 can be connected to the fire monitors, and the outlet pipe 1 2 and the outlet pipe 1 8 can be connected to the fire hoses, so that two fires can be extinguished simultaneously.

Claims

1. A single-stage centrifugal fire pump, characterized in that, The system includes a pump body (1), with the inlet end of the pump body (1) fixedly connected to an inlet pipe (2). A valve (3) is installed in the middle of the inlet pipe (2). The other end of the inlet pipe (2) extends forward and is fixedly connected to a connecting pipe (4) via a flange. The top middle of the connecting pipe (4) is fixedly connected to a sludge discharge pipe (5). A valve (6) is installed on the upper part of the sludge discharge pipe (5). A filter screen (7) is fixedly connected to the inner wall of the connecting pipe (4). The filter screen (7) is located at the bottom of the sludge discharge pipe (5). The upper part of the filter screen (7) is inclined towards the bottom wall of the connecting pipe (4). The outlet end of the pump body (1) is fixedly connected to the bottom end of a three-way pipe (8) via a flange. The other two ends of the three-way pipe (8) are connected to the bottom end of the connecting pipe (8). One end of the connecting pipe (9) and the spare water supply pipe (16) are fixedly connected by flanges. The other end of the connecting pipe (9) is fixedly connected to one end of the main water supply pipe (10) by flanges. The other end of the main water supply pipe (10) is fixedly connected to one end of the short pipe (11) by flanges. The other end of the short pipe (11) is fixedly connected to the outlet pipe (12) by flanges. Valve (13) is installed in the short pipe (11). The other end of the spare water supply pipe (16) is fixedly connected to one end of the short pipe (17) by flanges. The other end of the short pipe (17) is fixedly connected to the outlet pipe (18) by flanges. Valve (19) is installed in the short pipe (17).

2. A single-stage centrifugal fire pump according to claim 1, characterized in that, The top middle of the connecting pipe 2 (9) is fixedly connected to the outer pipe (14), and the upper part of the outer pipe (14) is equipped with valve 4 (15).

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