Self-suction sewage centrifugal pump

Abstract

The utility model relates to the technical field of self-suction type sewage centrifugal pumps, in particular to a self-suction type sewage centrifugal pump which comprises a pump body, a water inlet pipe is fixed on one side of the pump body, a water outlet pipe is fixed on the surface of the pump body, an installation mechanism is arranged at one end of the water outlet pipe and one end of the water inlet pipe, and the installation mechanism is composed of an installation assembly and a fixing stud. A filtering mechanism is arranged in the water inlet pipe, a filtering component and an annular groove are arranged in the filtering mechanism, an anti-backflow mechanism is arranged in the water outlet pipe, and an anti-backflow assembly and a baffle are arranged in the anti-backflow mechanism. According to the self-suction type sewage centrifugal pump, the cleanliness of sewage is improved when the self-suction type sewage centrifugal pump is used, the service life of the self-suction type sewage centrifugal pump is prolonged, and the convenience degree when the self-suction type sewage centrifugal pump is connected with a pipeline is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of self-priming sewage centrifugal pumps, in particular to a self-priming sewage centrifugal pump. Background Art

[0002] With the strong policy support of the state for the environmental protection industry, the environmental protection industry has developed vigorously and become an important pillar industry of the national economy. Self-priming sewage centrifugal pumps are often used in sewage treatment. Self-priming sewage centrifugal pumps are single-stage, single-suction, cantilever centrifugal pumps. The pump suction inlet is axially horizontal, and the pump discharge outlet can be installed in a horizontal or vertical direction as needed.

[0003] The self-priming sewage centrifugal pump uses the centrifugal force generated by the rotation of the impeller to transport liquid. Self-priming relies on atmospheric pressure. The rotating impeller throws the water in the middle to the outside, and the water on the outside rotates along the impeller. The volute guides the water to the pump casing. When the water in the volute and the water inlet is emptied, the rotating impeller will continue to discharge the air in the water inlet pipe. Because the water in the pump casing acts as a seal, the air in the water inlet pipe can only go out but not in, thereby achieving the purpose of self-priming. The principle is that because the impeller discharges the air in the water inlet pipe, the water in the water inlet pipe is close to a vacuum, and the external atmospheric pressure will naturally press the water into the water pump.

[0004] When sewage is sucked in, it is easy to contain impurities inside, and the general self-priming sewage centrifugal pump is not easy to filter the sewage, which affects the cleanliness of the sewage when the self-priming sewage centrifugal pump is used; the operation of the self-priming sewage centrifugal pump is controlled and driven by filling the pump body and the inlet pipeline with liquid medium. When in use, most self-priming sewage centrifugal pumps are not conducive to convenient one-way control and transportation, which can easily cause sewage to flow back into the self-priming sewage centrifugal pump, affecting the service life of the self-priming sewage centrifugal pump; self-priming sewage centrifugal pumps are generally connected to the pipeline through flanges, and tools are required for connection, which is cumbersome, thereby reducing the convenience of connecting the self-priming sewage centrifugal pump to the pipeline. Utility Model Content

[0005] The utility model aims to provide a self-priming sewage centrifugal pump to solve the problems in the above background technology that the sewage cleanliness level is low when the self-priming sewage centrifugal pump is used, which easily affects the service life of the self-priming sewage centrifugal pump and the inconvenience of connecting pipes is low.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-priming sewage centrifugal pump, comprising a pump body, a water inlet pipe is fixed on one side of the pump body, a water outlet pipe is fixed on the surface of the pump body, a mounting mechanism is provided at one end of the water outlet pipe and the water inlet pipe, the mounting mechanism is composed of a mounting assembly and a fixing stud, a filtering mechanism is provided inside the water inlet pipe, the interior of the filtering mechanism includes a filtering component and an annular groove, an anti-backflow mechanism is provided inside the water outlet pipe, the interior of the anti-backflow mechanism includes an anti-backflow assembly and a baffle.

[0007] Preferably, fixing studs are fixed to one side of the water inlet pipe and the water outlet pipe along the circumferential direction, and mounting components are provided on the surfaces of the fixing studs.

[0008] Preferably, the interior of the installation assembly includes a gasket, a nut and a turning handle, the surface of the fixing stud is sleeved with a nut, and the nut and the fixing stud are threadedly matched with each other.

[0009] Preferably, a turning handle is fixed on the surface of the nut, and a gasket is sleeved on the surface of the fixing stud, and the gasket is located on the inner side of the nut.

[0010] Preferably, an annular groove is formed at one end of the water inlet pipe, and a filter component is disposed inside the annular groove.

[0011] Preferably, the interior of the filter component includes a collar, an activated carbon layer and a sealing ring, and the interior of the water inlet pipe is provided with a collar. The collar has a T-shaped structure, and one end of the collar is located inside the annular groove.

[0012] Preferably, an activated carbon layer is fixed inside the ring, a sealing ring is adhered to one end of the ring, and the surface of the sealing ring is tightly fitted to the surface of the water inlet pipe.

[0013] Preferably, a baffle is fixed inside the water outlet pipe, and a backflow prevention component is provided on the surface of the baffle.

[0014] Preferably, the backflow prevention assembly consists of an backflow prevention sheet, a compression spring and a water hole. The surface of the baffle is provided with a water hole, one side of the water hole is covered with an backflow prevention sheet, and one end of the backflow prevention sheet is rotatably connected to the inner wall of the outlet pipe.

[0015] Preferably, a compression spring is fixed to one end of the backflow prevention sheet, and one end of the compression spring is fixedly connected to the inner wall of the water outlet pipe.

[0016] Compared with the prior art, the beneficial effects of the utility model are: the self-priming sewage centrifugal pump not only improves the cleanliness of sewage when the self-priming sewage centrifugal pump is used, prolongs the service life of the self-priming sewage centrifugal pump, but also improves the convenience of connecting the self-priming sewage centrifugal pump to the pipeline;

[0017] By providing a filtering mechanism, before the pipeline is connected, the collar can be inserted into the water inlet pipe so that one end of the collar is located inside the annular groove. When the pipeline is connected, the pipeline squeezes the sealing ring, and the collar can be clamped under the action of the pipeline and the annular groove, and the sealing between the pipeline and the water inlet pipe is facilitated under the action of the sealing ring. Subsequently, the sewage entering the water inlet pipe can be filtered under the action of the activated carbon layer, so as to realize the filtering function of the self-priming sewage centrifugal pump on the sewage, thereby improving the cleanliness of the sewage when the self-priming sewage centrifugal pump is used;

[0018] By providing an anti-backflow mechanism, sewage is controlled to enter the water inlet pipe through the pump body and be discharged through the water outlet pipe. When the water is discharged, the water flows through the water hole to impact the anti-backflow plate, so that the anti-backflow plate rotates and opens, so that the sewage passes through the water hole and is discharged through the water outlet pipe. If the self-priming sewage centrifugal pump stops working, the water flow no longer impacts the anti-backflow plate. At this time, the anti-backflow plate is tightly attached to the baffle under the elastic force of the compression spring, so that the anti-backflow plate covers the water hole, and the sewage remaining at one end of the outlet pipe is prevented from flowing back to the pump body through the water hole, so as to realize the sewage backflow prevention function of the self-priming sewage centrifugal pump, thereby extending the service life of the self-priming sewage centrifugal pump;

[0019] By providing an installation mechanism, the pipe to be connected with the water inlet pipe is placed on one side of the water inlet pipe, the pipe is sleeved onto the surface of the fixing stud through the flange, the gasket is then sleeved onto one end of the fixing stud, and the nut is then sleeved onto the surface of the fixing stud. The handle is then turned to drive the nut to rotate, and the water inlet pipe and the pipe are fixed under the cooperation of the threads of the nut and the fixing stud. Similarly, the water outlet pipe and the pipe are connected through the installation mechanism to realize the function of facilitating the connection of the self-priming sewage centrifugal pump to the pipe, thereby improving the convenience of connecting the self-priming sewage centrifugal pump to the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the utility model;

[0021] Figure 2 It is a side cross-sectional structural schematic diagram of the utility model;

[0022] Figure 3 It is a partial enlarged structural schematic diagram of the utility model;

[0023] Figure 4 It is an enlarged structural diagram of the backflow prevention mechanism of the utility model.

[0024] In the figure: 1. pump body; 101. water inlet pipe; 102. water outlet pipe; 2. installation mechanism; 201. installation assembly; 2011. gasket; 2012. nut; 2013. handle; 202. fixing stud; 3. filtering mechanism; 301. filtering component; 3011. collar; 3012. activated carbon layer; 3013. sealing ring; 302. annular groove; 4. anti-backflow mechanism; 401. anti-backflow assembly; 4011. anti-backflow sheet; 4012. compression spring; 4013. water hole; 402. baffle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. In addition, the terms "first", "second", "third", "upper, lower, left, right", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] The utility model provides a self-priming sewage centrifugal pump with a structure as follows Figure 1 and Figure 2 As shown, it comprises a pump body 1 , a water inlet pipe 101 is fixed on one side of the pump body 1 , and a water outlet pipe 102 is fixed on the surface of the pump body 1 .

[0027] Furthermore, if Figure 3 As shown, an installation mechanism 2 is provided at one end of the water outlet pipe 102 and the water inlet pipe 101, and the installation mechanism 2 is composed of a installation component 201 and a fixing stud 202. A fixing stud 202 is fixed circumferentially on one side of the water inlet pipe 101 and the water outlet pipe 102, and the surface of the fixing stud 202 is provided with an installation component 201, and the interior of the installation component 201 includes a gasket 2011, a nut 2012 and a turning handle 2013. The surface of the fixing stud 202 is sleeved with a nut 2012, and the nut 2012 and the fixing stud 202 are threadedly matched with each other, and the surface of the nut 2012 is fixed with a turning handle 2013, and the surface of the fixing stud 202 is sleeved with a gasket 2011, and the gasket 2011 is located on the inner side of the nut 2012.

[0028] When in use, place the pipe to be connected to the water inlet pipe 101 on one side of the water inlet pipe 101, so that the pipe is sleeved onto the surface of the fixing stud 202 through the flange, then sleeve the gasket 2011 onto one end of the fixing stud 202, and then sleeve the nut 2012 onto the surface of the fixing stud 202, then turn the handle 2013 to make the handle 2013 drive the nut 2012 to rotate, and fix the water inlet pipe 101 to the pipeline under the thread cooperation of the nut 2012 and the fixing stud 202. Similarly, connect the water outlet pipe 102 to the pipeline through the installation mechanism 2 to realize the function of the self-priming sewage centrifugal pump to facilitate the connection of the pipeline.

[0029] Furthermore, if Figure 3 As shown, a filter mechanism 3 is arranged inside the water inlet pipe 101, and the interior of the filter mechanism 3 includes a filter component 301 and an annular groove 302. An annular groove 302 is opened at one end of the water inlet pipe 101, and the interior of the annular groove 302 is provided with the filter component 301. The interior of the filter component 301 includes a ring 3011, an activated carbon layer 3012 and a sealing ring 3013. The ring 3011 is placed inside the water inlet pipe 101, and the structure of the ring 3011 is a T-shaped structure. One end of the ring 3011 is located inside the annular groove 302, and the activated carbon layer 3012 is fixed inside the ring 3011. The sealing ring 3013 is adhered to one end of the ring 3011, and the surface of the sealing ring 3013 is tightly fitted with the surface of the water inlet pipe 101.

[0030] When in use, before the pipeline is connected, the ring 3011 can be inserted into the water inlet pipe 101 so that one end of the ring 3011 is located inside the annular groove 302. When the pipeline is connected, the pipeline squeezes the sealing ring 3013, and the ring 3011 can be clamped under the action of the pipeline and the annular groove 302, and the sealing ring 3013 facilitates the sealing between the pipeline and the water inlet pipe 101. Subsequently, the sewage entering the water inlet pipe 101 can be filtered under the action of the activated carbon layer 3012, so as to realize the filtering function of the self-priming sewage centrifugal pump on sewage.

[0031] Furthermore, if Figure 4 As shown, the interior of the water outlet pipe 102 is provided with an anti-backflow mechanism 4, and the interior of the anti-backflow mechanism 4 includes an anti-backflow component 401 and a baffle 402. The interior of the water outlet pipe 102 is fixed with a baffle 402, and the surface of the baffle 402 is provided with an anti-backflow component 401, and the anti-backflow component 401 is composed of an anti-backflow sheet 4011, a compression spring 4012 and a water hole 4013. The surface of the baffle 402 is provided with a water hole 4013, and one side of the water hole 4013 is covered with an anti-backflow sheet 4011, one end of the anti-backflow sheet 4011 is rotatably connected to the inner wall of the water outlet pipe 102, and one end of the anti-backflow sheet 4011 is fixed with a compression spring 4012, and one end of the compression spring 4012 is fixedly connected to the inner wall of the water outlet pipe 102.

[0032] When in use, the sewage is controlled to enter the water inlet pipe 101 through the pump body 1 and is discharged through the water outlet pipe 102. When water is discharged, the water flows through the water hole 4013 to impact the anti-backflow plate 4011, causing the anti-backflow plate 4011 to rotate and open, so that the sewage passes through the water hole 4013 and is discharged through the water outlet pipe 102. If the self-priming sewage centrifugal pump stops working, the water flow no longer impacts the anti-backflow plate 4011. At this time, the anti-backflow plate 4011 is tightly attached to the baffle 402 under the elastic force of the compression spring 4012, so that the anti-backflow plate 4011 blocks and covers the water hole 4013, thereby preventing the sewage remaining at one end of the outlet pipe 102 from flowing back into the pump body 1 through the water hole 4013, so as to realize the sewage backflow prevention function of the self-priming sewage centrifugal pump.

[0033] Working principle: When in use, first place the pipe to be connected to the water inlet pipe 101 to one side of the water inlet pipe 101, so that the pipe is sleeved to the surface of the fixing stud 202 through the flange, then sleeve the gasket 2011 to one end of the fixing stud 202, and then sleeve the nut 2012 to the surface of the fixing stud 202, and then turn the handle 2013 to make the handle 2013 drive the nut 2012 to rotate, and fix the water inlet pipe 101 to the pipeline under the thread cooperation of the nut 2012 and the fixing stud 202. Similarly, the water outlet pipe 102 is connected to the pipeline through the installation mechanism 2 to realize the function of facilitating the connection of the self-priming sewage centrifugal pump to the pipeline, thereby improving the convenience of connecting the self-priming sewage centrifugal pump to the pipeline.

[0034] Before the pipeline is connected, the ring 3011 can be inserted into the water inlet pipe 101 so that one end of the ring 3011 is located in the annular groove 302. When the pipeline is connected, the pipeline squeezes the sealing ring 3013. The ring 3011 can be clamped under the action of the pipeline and the annular groove 302, and the sealing ring 3013 facilitates the sealing between the pipeline and the water inlet pipe 101. Subsequently, the sewage entering the water inlet pipe 101 can be filtered under the action of the activated carbon layer 3012 to realize the filtering function of the self-priming sewage centrifugal pump on the sewage, thereby improving the cleanliness of the sewage when the self-priming sewage centrifugal pump is used.

[0035] Then, the sewage is controlled to enter the water inlet pipe 101 through the pump body 1 and is discharged through the water outlet pipe 102. When the water is discharged, the water flows through the water hole 4013 to impact the anti-backflow plate 4011, causing the anti-backflow plate 4011 to rotate and open, so that the sewage passes through the water hole 4013 and is discharged through the water outlet pipe 102. If the self-priming sewage centrifugal pump stops working, the water flow no longer impacts the anti-backflow plate 4011. At this time, the anti-backflow plate 4011 is tightly attached to the baffle 402 under the elastic force of the compression spring 4012, so that the anti-backflow plate 4011 blocks and covers the water hole 4013, preventing the sewage remaining at one end of the outlet pipe 102 from flowing back into the pump body 1 through the water hole 4013, so as to realize the sewage backflow prevention function of the self-priming sewage centrifugal pump, thereby extending the service life of the self-priming sewage centrifugal pump, and finally completing the use of the self-priming sewage centrifugal pump.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A self-priming sewage centrifugal pump, comprising a pump body (1), characterized in that: A water inlet pipe (101) is fixed to one side of the pump body (1), a water outlet pipe (102) is fixed to the surface of the pump body (1), a mounting mechanism (2) is provided between the water outlet pipe (102) and one end of the water inlet pipe (101), the mounting mechanism (2) comprising a mounting assembly (201) and a fixing stud (202), a filtering mechanism (3) is provided inside the water inlet pipe (101), the filtering mechanism (3) comprises a filtering component (301) and an annular groove (302), a backflow prevention mechanism (4) is provided inside the water outlet pipe (102), the backflow prevention mechanism (4) comprises a backflow prevention assembly (401) and a baffle (402).

2. A self-priming sewage centrifugal pump according to claim 1, characterized in that: A fixing stud (202) is fixed along the circumferential direction on one side of the water inlet pipe (101) and the water outlet pipe (102), and a mounting assembly (201) is provided on the surface of the fixing stud (202).

3. A self-priming sewage centrifugal pump according to claim 2, characterized in that: The interior of the installation assembly (201) comprises a gasket (2011), a nut (2012) and a turning handle (2013); the surface of the fixing stud (202) is sleeved with the nut (2012); the nut (2012) and the fixing stud (202) are threadably matched with each other.

4. A self-priming sewage centrifugal pump according to claim 3, characterized in that: A turning handle (2013) is fixed on the surface of the nut (2012), a gasket (2011) is sleeved on the surface of the fixing stud (202), and the gasket (2011) is located on the inner side of the nut (2012).

5. A self-priming sewage centrifugal pump according to claim 1, characterized in that: An annular groove (302) is provided at one end of the water inlet pipe (101), and a filtering component (301) is arranged inside the annular groove (302).

6. A self-priming sewage centrifugal pump according to claim 5, characterized in that: The filter component (301) contains a collar (3011), an activated carbon layer (3012) and a sealing ring (3013) inside, and the collar (3011) is placed inside the water inlet pipe (101). The collar (3011) has a T-shaped structure, and one end of the collar (3011) is located inside the annular groove (302).

7. A self-priming sewage centrifugal pump according to claim 6, characterized in that: An activated carbon layer (3012) is fixed inside the collar (3011), a sealing ring (3013) is adhered to one end of the collar (3011), and a surface of the sealing ring (3013) is tightly fitted to a surface of the water inlet pipe (101).

8. A self-priming sewage centrifugal pump according to claim 1, characterized in that: A baffle (402) is fixed inside the water outlet pipe (102), and a backflow prevention component (401) is provided on the surface of the baffle (402).

9. A self-priming sewage centrifugal pump according to claim 8, characterized in that: The backflow prevention component (401) is composed of a backflow prevention sheet (4011), a compression spring (4012) and a water through hole (4013); the surface of the baffle plate (402) is provided with a water through hole (4013); one side of the water through hole (4013) is covered with the backflow prevention sheet (4011); one end of the backflow prevention sheet (4011) is rotatably connected to the inner wall of the water outlet pipe (102).

10. A self-priming sewage centrifugal pump according to claim 9, characterized in that: A compression spring (4012) is fixed to one end of the backflow prevention sheet (4011), and one end of the compression spring (4012) is fixedly connected to the inner wall of the water outlet pipe (102).

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