Self-suction sewage pump body
By designing the convex pipe with the impeller in a self-priming sewage pump, the arc shape of the inner side of the pipe and the cutting cutter plate, the problem of dirt bypassing the cutting wheel is solved, and more efficient dirt is achieved Cut and reduce maintenance frequency.
Patent Information
- Application Number
- CN202421092190.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In existing self-priming sewage pumps, dirt can easily bypass the matching position of the cutting wheel and the static cutting knife, affecting the cutting effect, resulting in clogging of the pump chamber and high maintenance frequency.
A self-priming sewage pump pump body is designed, which is arranged coaxially with the impeller. The inner side of the impeller is arc-shaped, and the lower end of the impeller extends into the inner hole of the deflector barrel. Combined with the cutting blade, it forms a spiral flow to Cut dirt and improve the cutting effect and reduce pump chamber blockage through the coordination of the guide ring and the cutting blade.
It effectively improves the dirt cutting effect in sewage, avoids clogging of the pump chamber, reduces the maintenance frequency of sewage pumps, and is easy to use and maintain.
Smart Images
Figure CN222208301U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water pumps and relates to a self-priming sewage pump, in particular to a pump body of a self-priming sewage pump. Background Art
[0002] The self-priming sewage pump is a power equipment used for transportation. The pump integrates self-priming and sewage discharge. It is a new type of pump developed mainly based on the structure and performance of ZX self-priming centrifugal pump and submersible sewage pump, and drawing on the advantages of similar foreign products.
[0003] Existing sewage pumps, such as an anti-clogging and anti-winding centrifugal self-priming sewage pump (application number: 2016107953036) disclosed in the China Patent Library, include a pump body, an impeller installed in a vortex chamber in the inner cavity of the pump body, a pump shaft fixedly connected to the impeller, and a suspension supporting the pump shaft. The inner cavity of the pump body is also provided with a suction port, a suction channel, a discharge port, an air-water separation chamber and a return water hole. The suction port is provided with a suction check valve. A debris cutter coaxial with the impeller is arranged in front of the impeller water inlet in the suction channel of the pump body. The debris cutter is composed of a stationary knife holder and a cutting wheel; a plurality of evenly distributed stationary cutting knives are provided on the stationary knife holder of the debris cutter.
[0004] In the above sewage pump, the debris cutter is arranged on one side of the impeller and there is a certain distance between the two. During the flow of sewage, it is easy for dirt to bypass the coordinated cutting position of the cutter wheel and the static cutter, affecting the cutting effect. Utility Model Content
[0005] The utility model aims to solve the above problems in the prior art and proposes a self-priming sewage pump body with good cutting effect.
[0006] The purpose of the utility model can be achieved through the following technical solutions: a self-priming sewage pump body, including a pump casing, a cutting blade disc and an impeller matched with the cutting blade disc, a liquid inlet channel, a liquid outlet channel and a pump chamber for horizontally placing the impeller are formed in the pump casing, an outlet connected to the liquid outlet channel is provided on one side of the pump chamber, an inlet is provided on the bottom wall of the pump chamber, the cutting blade disc and the impeller are coaxially arranged, and it is characterized in that a guide barrel coaxially arranged with the impeller is also fixed in the pump casing, the upper end of the guide barrel is a guide ring matching the inlet, the guide ring is penetrated in the inlet, and the liquid inlet channel is connected to the above-mentioned pump chamber through the guide barrel; the cutting blade disc is pressed and fixed on the bottom surface of the guide ring, the lower end of the impeller extends into the inner hole of the guide ring and is arranged close to the cutting blade disc, and the inner side surface of the guide ring is in the shape of a circular arc matched with the impeller; a strip-shaped chip removal groove is provided on the top surface of the guide ring, and the two ends of the chip removal groove extend to the inner side surface and the outer side surface of the guide ring respectively.
[0007] When the sewage pump is running, the impeller rotates at high speed to form a negative pressure in the pump chamber. The sewage enters from the liquid inlet channel, enters the pump chamber through the diversion barrel and is finally discharged into the liquid outlet channel. Among them, the impeller, cutting disc and guide ring cooperate to chop up the dirt in the sewage, and the chopped dirt is mainly discharged from the inner hole of the guide ring through the chip discharge groove.
[0008] The guide barrel is connected to the pump chamber by a guide ring, and the lower end of the impeller is extended into the inner hole of the guide ring, and the inner side surface of the guide ring is in an arc shape that matches the impeller, so that the fluid flows upward in a spiral manner at the guide ring and fully contacts the blade on the cutting disc, effectively improving the cutting effect, avoiding the pump chamber from being blocked by dirt, reducing the maintenance frequency of the sewage pump, and facilitating use.
[0009] In the above-mentioned self-priming sewage pump body, the bottom of the above-mentioned diversion barrel is closed and one side is open. A sealing surface matching the outer side of the diversion barrel is formed in the pump casing. The sealing surface is tightly attached to the side of the diversion barrel with the opening. The two ends of the liquid inlet channel are respectively a discharge port and a liquid inlet. The discharge port is arranged on the sealing surface and is directly opposite to the above-mentioned opening, so that the liquid inlet channel and the diversion barrel are stably connected, and it has the advantages of simple structure and easy assembly.
[0010] In the above-mentioned self-priming sewage pump body, the guide barrel is composed of a barrel body and a ring body pressed tightly on the top surface of the barrel body, the ring body and the barrel body are detachably connected, the above-mentioned opening is arranged on the barrel body, and the ring body is the above-mentioned guide ring. With the above-mentioned design, the guide ring and the cutting disc can be removed separately for easy cleaning.
[0011] In the above-mentioned self-priming sewage pump body, the cutting blade disc and the guide ring are detachably connected so that the two can be separated independently for easy cleaning.
[0012] In the above-mentioned self-priming sewage pump body, a through hole is vertically penetrated at the bottom of the pump casing and arranged opposite to the diversion barrel, and the diversion barrel can be extended into or out of the pump casing through the through hole; the lower end of the diversion barrel is inserted into the through hole, and a seal is formed between the outer wall of the lower end of the diversion barrel and the through hole; the lower end of the diversion barrel is detachably connected to the pump casing through a connecting structure, and the connecting structure can be operated outside the pump casing to connect or separate the diversion barrel from the pump casing. With the cooperation of the through hole and the connecting structure, the diversion barrel can be taken out of the pump casing separately to clean the guide ring and the cutting disc, so as to effectively reduce the number and steps of disassembling parts and further facilitate subsequent maintenance.
[0013] In the above-mentioned self-priming sewage pump body, an annular limit seat is formed on the outer wall of the lower end of the diversion barrel. The limit seat is coaxially arranged with the diversion barrel, and the limit seat is tightly pressed against the bottom wall of the pump casing. It is used to limit the installation position of the diversion barrel so that the diversion barrel can be installed in place at one time, which is convenient for assembly.
[0014] In the above-mentioned self-priming sewage pump body, the connection structure includes the above-mentioned limit seat, the type of the limit seat is an annular flange, and the annular flange is detachably fixed to the pump casing by a circle of bolts, and has the advantages of simple structure and stable structure.
[0015] As another solution, in the above-mentioned self-priming sewage pump body, the connection structure includes an external thread arranged on the outer wall of the guide barrel and an internal thread arranged on the inner wall of the through hole, and the internal thread and the external thread are meshed.
[0016] In the above-mentioned self-priming sewage pump body, the guide barrel forms a seal with the through hole by utilizing the annular sealing gasket to enhance the sealing effect and prevent leakage, thereby ensuring the stable operation of the sewage pump.
[0017] In the above-mentioned self-priming sewage pump body, the guide ring is detachably fixedly connected to the barrel body by a vertically arranged first screw, and the head of the first screw is arranged upward, so as to facilitate the disassembly and assembly of the guide ring and the barrel body.
[0018] Compared with the existing technology, the pump body of this self-priming sewage pump has the following advantages:
[0019] 1. The guide barrel uses a guide ring to connect the pump chamber, and the lower end of the impeller is arranged to extend into the inner hole of the guide ring, and the inner side of the guide ring is in an arc shape that matches the impeller, so that the fluid flows upward in a spiral manner at the guide ring and fully contacts the blade on the cutting disc, effectively improving the cutting effect, avoiding the pump chamber from being blocked by dirt, reducing the maintenance frequency of the sewage pump, and facilitating use.
[0020] 2. With the cooperation of the through hole and the connection structure, the guide barrel can be taken out from the pump casing separately to clean the guide ring and the cutting disc, so as to effectively reduce the number and steps of disassembly and assembly of parts, and further facilitate subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a three-dimensional schematic diagram of the pump body of a self-priming sewage pump.
[0022] Figure 2 It is a cross-sectional schematic diagram of the pump body of a self-priming sewage pump.
[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the pump casing.
[0024] Figure 4 This is a schematic diagram of the position of the impeller and guide barrel.
[0025] In the figure, 1, pump housing; 1a, liquid inlet channel; 1b, liquid outlet channel; 1c, pump chamber; 1d, sealing surface; 1e, through hole; 2, cutting disc; 3, impeller; 4, guide barrel; 4a, guide ring; 4b, chip groove; 4c, limit seat; 4d, barrel body; 4e, opening; 5, annular sealing gasket. DETAILED DESCRIPTION
[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1
[0027] like Figure 1 As shown, the pump body of the self-priming sewage pump includes a pump housing 1, a cutting disc 2 and an impeller 3 matched with the cutting disc 2, and the cutting disc 2 and the impeller 3 are coaxially arranged.
[0028] Specifically,
[0029] like Figure 2 and Figure 3 As shown, the interior of the pump housing 1 is a cavity, which includes a liquid inlet channel 1a, a liquid outlet channel 1b, and a pump chamber 1c for horizontally placing the impeller 3. The two ends of the liquid inlet channel 1a are respectively a liquid discharge port and a liquid inlet, and the liquid inlet is the liquid inlet of the sewage pump; one end of the liquid outlet channel 1b is the liquid outlet of the sewage pump. An outlet connected to the liquid outlet channel 1b is provided on one side of the pump chamber 1c, and an inlet is provided on the bottom wall of the pump chamber 1c.
[0030] like Figures 2 to 4 As shown, a guide barrel 4 coaxially arranged with the impeller 3 is also fixed in the pump housing 1. The upper end of the guide barrel 4 is a guide ring 4a matching the inlet. The guide ring 4a is inserted into the inlet, and the outer side of the guide ring 4a is in contact and sealed with the inner side of the inlet. The discharge port of the inlet channel 1a is connected to the pump chamber 1c through the guide barrel 4. The cutting disc 2 is pressed and fixed on the bottom surface of the guide ring 4a. The lower end of the impeller 3 extends into the inner hole of the guide ring 4a and is arranged close to the cutting disc 2, and the inner side of the guide ring 4a is in an arc shape that matches the impeller 3. A strip-shaped chip removal groove 4b is provided on the top surface of the guide ring 4a, and the two ends of the chip removal groove 4b extend to the inner side and outer side of the guide ring 4a respectively.
[0031] When the sewage pump is running, the impeller 3 rotates at a high speed to form a negative pressure in the pump chamber 1c, and the sewage enters from the liquid inlet channel 1a, enters the pump chamber 1c through the guide barrel 4, and finally enters the liquid outlet channel 1b for discharge; wherein, the impeller 3, the cutting blade 2 and the guide ring 4a cooperate to chop the dirt in the sewage, and the chopped dirt is mainly discharged from the inner hole of the guide ring 4a through the chip discharge groove 4b. Preferably, the chip discharge groove 4b is spiral so that the chopped dirt can be thrown out more quickly.
[0032] The guide barrel 4 is connected to the pump chamber 1c by means of a guide ring 4a, and the lower end of the impeller 3 is arranged to extend into the inner hole of the guide ring 4a, and the inner side surface of the guide ring 4a is in an arc shape that matches the impeller 3, so that the fluid flows upward in a spiral manner at the guide ring 4a and fully contacts the blade on the cutting disc 2, thereby effectively improving the cutting effect, avoiding the pump chamber 1c from being blocked by dirt, reducing the maintenance frequency of the sewage pump, and facilitating use.
[0033] In this embodiment,
[0034] like Figure 2 , Figure 3 and Figure 4 As shown, the connection between the liquid inlet channel 1a and the guide barrel 4 is as follows: the guide barrel 4 is closed at the bottom and has an opening 4e on one side, a sealing surface 1d matching the outer side of the guide barrel 4 is formed in the pump housing 1, the sealing surface 1d is tightly attached to the side of the guide barrel 4 with the opening 4e, the liquid outlet is arranged on the sealing surface 1d and is arranged directly opposite to the opening 4e, so that the liquid inlet channel 1a and the guide barrel 4 are stably connected, with the advantages of simple structure and convenient assembly, etc. Preferably, the guide barrel 4 is in the shape of a cylinder, and the sealing surface 1d is an arc surface matching the guide barrel 4, so that a more reliable seal is formed between the guide barrel 4 and the sealing surface 1d.
[0035] The installation method of the guide barrel 4 is as follows: a through hole 1e arranged opposite to the guide barrel 4 is vertically penetrated through the bottom of the pump casing 1, and the guide barrel 4 can extend into or out of the pump casing 1 with the help of the through hole 1e. The lower end of the guide barrel 4 is inserted into the through hole 1e, and a seal is formed between the outer wall of the lower end of the guide barrel 4 and the through hole 1e. The lower end of the guide barrel 4 is detachably connected to the pump casing 1 through a connecting structure, and the connecting structure can be operated outside the pump casing 1 to connect or separate the guide barrel 4 from the pump casing 1. With the cooperation of the through hole 1e and the connecting structure, the guide barrel 4 can be taken out of the pump casing 1 separately to clean the guide ring 4a and the cutting disc 2, so as to effectively reduce the number and steps of disassembling parts, and further facilitate subsequent maintenance.
[0036] To further explain, a ring-shaped limit seat 4c is integrally formed on the outer wall of the lower end of the guide barrel 4. The limit seat 4c is coaxially arranged with the guide barrel 4, and the limit seat 4c is tightly pressed against the bottom wall of the pump casing 1, and is used to limit the installation position of the guide barrel 4, so that the guide barrel 4 can be installed in place at one time, which is convenient for assembly.
[0037] in,
[0038] The connection structure includes the above-mentioned limit seat 4c, which is an annular flange, and the annular flange is detachably fixed to the pump housing 1 through a circle of bolts, and has the advantages of simple structure and stable structure.
[0039] The guide barrel 4 forms a seal with the through hole 1e by using the annular sealing gasket 5 to strengthen the sealing effect and prevent leakage, thereby ensuring the stable operation of the sewage pump. Specifically, an annular step is provided on the inner wall of the lower end of the through hole 1e, and the annular sealing gasket 5 is sleeved on the guide barrel 4 and is located in the annular step, and the two end surfaces of the annular sealing gasket 5 are respectively in contact with the bottom surface of the annular step and the limit seat 4c for sealing.
[0040] like Figure 2 and Figure 4As shown, the guide barrel 4 is composed of a barrel body 4d and a ring body pressed tightly on the top surface of the barrel body 4d. The ring body and the barrel body 4d are coaxially arranged, and the ring body and the barrel body 4d are detachably connected. Among them, the opening 4e and the limit seat 4c are both arranged on the barrel body 4d, and the barrel body 4d is in contact with the sealing surface 1d; the ring body is the above-mentioned guide ring 4a. With the above-mentioned design, the guide ring 4a and the cutting disc 2 can be removed separately for easy cleaning. Further explanation, the cutting disc 2 and the guide ring 4a are detachably connected, so that the two can be separated independently for easy cleaning.
[0041] In the actual product, the guide ring 4a is detachably connected to the barrel body 4d by a vertically arranged first screw, and the head of the first screw is arranged upward, which is convenient for the guide ring 4a and the barrel body 4d to be disassembled and assembled. The cutting disc 2 is detachably connected to the guide ring 4a by a circle of second screws, and the head of the second screw is arranged downward, which is convenient for the cutting disc 2 to be disassembled and assembled with the guide ring 4a. Embodiment 2
[0042] The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that the connection structure includes an external thread arranged on the outer wall of the guide barrel 4 and an internal thread arranged on the inner wall of the through hole 1e, and the internal thread and the external thread are meshed.
[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A self-priming sewage pump body, comprising a pump housing (1), a cutting blade (2) and an impeller (3) matched with the cutting blade (2), wherein a liquid inlet channel (1a), a liquid outlet channel (1b) and a pump chamber (1c) for horizontally placing the impeller (3) are formed in the pump housing (1), an outlet connected to the liquid outlet channel (1b) is provided on one side of the pump chamber (1c), an inlet is provided on the bottom wall of the pump chamber (1c), the cutting blade (2) and the impeller (3) are coaxially arranged, and the pump chamber (1c) is characterized in that: A guide barrel (4) coaxially arranged with the impeller (3) is also fixed in the pump housing (1); the upper end of the guide barrel (4) is a guide ring (4a) matching the inlet; the guide ring (4a) is inserted into the inlet, and the liquid inlet channel (1a) is connected to the pump chamber (1c) through the guide barrel (4); the cutting disc (2) is pressed and fixed on the bottom surface of the guide ring (4a); the lower end of the impeller (3) extends into the inner hole of the guide ring (4a) and is arranged close to the cutting disc (2); and the inner side surface of the guide ring (4a) is in the shape of an arc that matches the impeller (3); a strip-shaped chip removal groove (4b) is provided on the top surface of the guide ring (4a), and the two ends of the chip removal groove (4b) extend to the inner side surface and the outer side surface of the guide ring (4a) respectively.
2. The self-priming sewage pump body according to claim 1, characterized in that: The guide barrel (4) is closed at the bottom and has an opening (4e) on one side. A sealing surface (1d) matching the outer side of the guide barrel (4) is formed inside the pump housing (1). The sealing surface (1d) is tightly attached to the side of the guide barrel (4) having the opening (4e). The two ends of the liquid inlet channel (1a) are respectively a liquid discharge port and a liquid inlet port. The liquid discharge port is arranged on the sealing surface (1d) and is arranged directly opposite to the opening (4e).
3. The self-priming sewage pump body according to claim 2, characterized in that: The guide barrel (4) is composed of a barrel body (4d) and a ring body tightly pressed against the top surface of the barrel body (4d); the ring body and the barrel body (4d) are detachably fixedly connected; the opening (4e) is arranged on the barrel body (4d), and the ring body is the guide ring (4a) mentioned above.
4. The self-priming sewage pump body according to claim 3, characterized in that: The cutting blade disc (2) and the guide ring (4a) are detachably connected.
5. The self-priming sewage pump body according to claim 1, 2, 3 or 4, characterized in that: A through hole (1e) is vertically penetrated through the bottom of the pump casing (1) and is arranged opposite to the guide barrel (4), and the guide barrel (4) can extend into or out of the pump casing (1) by means of the through hole (1e); the lower end of the guide barrel (4) is inserted into the through hole (1e), and a seal is formed between the outer wall of the lower end of the guide barrel (4) and the through hole (1e); the lower end of the guide barrel (4) is detachably fixedly connected to the pump casing (1) via a connecting structure, and the connecting structure can be operated outside the pump casing (1) to connect or separate the guide barrel (4) from the pump casing (1).
6. The self-priming sewage pump body according to claim 5, characterized in that: An annular limit seat (4c) is formed on the outer wall of the lower end of the guide barrel (4); the limit seat (4c) is coaxially arranged with the guide barrel (4), and the limit seat (4c) is tightly pressed against the bottom wall of the pump casing (1).
7. The self-priming sewage pump body according to claim 6, characterized in that: The connection structure comprises the above-mentioned limiting seat (4c), the limiting seat (4c) is of an annular flange type, and the annular flange is detachably fixedly connected to the pump casing (1) via a circle of bolts.
8. The self-priming sewage pump body according to claim 5, characterized in that: The connection structure comprises an external thread arranged on the outer wall of the guide barrel (4) and an internal thread arranged on the inner wall of the through hole (1e), and the internal thread and the external thread are meshed with each other.
9. The self-priming sewage pump body according to claim 5, characterized in that: The guide barrel (4) forms a seal with the through hole (1e) by using the annular sealing gasket (5).
10. The self-priming sewage pump body according to claim 3, characterized in that: The guide ring (4a) is detachably fixedly connected to the barrel body (4d) via a vertically arranged first screw, and the head of the first screw is arranged upward.