Cast iron impeller back clearance self-deslagging structure of anti-blocking pump

Abstract

The utility model relates to the technical field of water pumps, in particular to an anti-blocking pump cast iron impeller back clearance self-deslagging structure which comprises a water pump, the bottom of the water pump is fixedly connected with a lower connecting ring, the bottom of the lower connecting ring is fixedly connected with a cast iron cavity, the water pump is provided with a transmission shaft, the transmission shaft is fixedly connected with an impeller, and the impeller is fixedly connected with the cast iron cavity. A cleaning mechanism is arranged on the transmission shaft and comprises a connecting pipe. The cleaning mechanism is arranged, liquid is sprayed out through the oblique output pipe, and when the oblique output pipe outputs the sprayed liquid, the oblique output pipe bears a reverse acting force, so that the hollow disc block rotates under the circumferential acting force, and the sprayed liquid output by the oblique output pipe is rotationally sprayed out; and the jet water flow forms a rotary cleaning effect, and sundries or sediments in the back clearance can be discharged in a rotary jet manner, so that the anti-blocking effect is achieved, and the impurities at the back clearance of the impeller are washed more efficiently.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, specifically to a self-draining slag structure for the back clearance of an anti-clogging cast iron impeller in a pump. Background Technology

[0002] The back clearance of the cast iron impeller in an anti-clogging pump refers to the gap between the impeller back cover plate and the pump body or back cover. It is usually used to balance axial forces, reduce the impact of the medium inside the pump on the bearings, and reduce energy loss.

[0003] Impeller back clearance refers to the gap between the impeller and the pump body. Fluid flow is weaker in this area; compared to the high-speed rotating main flow zone, the flow velocity in the back clearance region is lower, and local eddies may even form. When fluid containing solid particles enters the pump chamber, most particles are discharged through the impeller outlet with the main flow. However, some smaller or denser particles are trapped by eddies in the back clearance region, lose kinetic energy, and gradually deposit. These deposits accumulate continuously with pump operation, and under the influence of fluid scouring and pressure changes, they further agglomerate or form denser sludge. Furthermore, some media contain soluble salts or colloidal substances, which enhance the adhesion between solid particles, making them more prone to aggregation in the back clearance region. Once these debris or sludge reaches a certain level, it leads to a decrease in pump efficiency, impeller obstruction, and even mechanical failure.

[0004] In view of this, we propose a self-draining slag structure for the back clearance of an anti-clogging pump cast iron impeller. Utility Model Content

[0005] The purpose of this utility model is to provide a self-draining slag structure for the back clearance of an anti-clogging pump cast iron impeller. This self-draining slag structure for the back clearance of an anti-clogging pump cast iron impeller solves the problem of long-term slag accumulation in the impeller back clearance leading to decreased pump efficiency, impeller obstruction, or even failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A self-draining slag structure for a cast iron impeller in an anti-clogging pump includes a water pump. A lower connecting ring is fixedly connected to the bottom of the water pump, and a cast iron cavity is fixedly connected to the bottom of the lower connecting ring. A drive shaft is mounted on the water pump, and an impeller is fixedly connected to the drive shaft. A cleaning mechanism is also mounted on the drive shaft. The cleaning mechanism includes: a connecting pipe fixedly connected to the inner wall of the drive shaft; a hollow hemispherical block fixedly connected to one end of the connecting pipe; a hollow disc block rotatably connected to the other end of the connecting pipe; an oblique output pipe fixedly connected to the inner wall of the hollow disc block; the hollow disc block and the hollow hemispherical block communicating through the connecting pipe; and a filter screen fixedly connected to the outer wall of the hollow hemispherical block. A crushing mechanism is mounted on the lower connecting ring and the impeller, and the crushing mechanism is used to cut entangled objects.

[0008] Preferably, the drive shaft is rotatably connected to the inner wall of the lower connecting ring, and a sealing device is provided between the drive shaft and the lower connecting ring.

[0009] Preferably, the drive shaft is rotatably connected to the inner wall of the cast iron cavity, and a sealing device is provided between the drive shaft and the cast iron cavity.

[0010] Preferably, the cleaning mechanism is provided in two sets, and the two sets of cleaning mechanisms are arranged in a circumferential array on the drive shaft.

[0011] Preferably, the crushing mechanism includes a connecting seat, which is fixedly connected to the impeller, and a cutting blade is fixedly connected to the outer wall of the connecting seat.

[0012] Preferably, a second connecting seat is fixedly connected to the bottom of the lower connecting ring, and a second cutting blade is fixedly connected to the outer wall of the second connecting seat.

[0013] Preferably, the second cutting blade is tangent to the first cutting blade, and the crushing mechanism is symmetrically arranged in two sets.

[0014] By employing the above technical solution, this utility model provides a self-slag discharge structure for the back clearance of an anti-clogging cast iron impeller in a pump. It possesses at least the following beneficial effects:

[0015] 1. This utility model incorporates a cleaning mechanism that sprays liquid through an angled output pipe. When the liquid is sprayed through the angled output pipe, it is subjected to a reverse force, causing the hollow disc block to rotate under circumferential force. This causes the liquid sprayed through the angled output pipe to rotate and be sprayed out, creating a rotating cleaning effect. This method can remove debris or sediment from the back gap by rotating the spray, thereby achieving an anti-clogging effect and more efficiently flushing impurities from the impeller back gap.

[0016] 2. This utility model incorporates a crushing mechanism. When the impeller rotates, it drives the connecting seat and the first cutting blade to rotate as well. The first cutting blade cuts impurities that are entangled or close to the impeller, preventing them from obstructing rotation or causing blockages. The second cutting blade is tangential to the first cutting blade, acting similarly to scissors to cut impurities entangled on both blades, effectively improving crushing capacity. This also prevents impurities from accumulating in the impeller back clearance, further enhancing the cleaning effect in the impeller back clearance. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2This is a schematic diagram of the lower connecting ring in this utility model;

[0020] Figure 3 This is a schematic diagram of the transmission shaft in this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A;

[0022] Figure 5 This is a schematic diagram of the crushing mechanism in this utility model;

[0023] Figure 6 This is a schematic diagram of the cleaning mechanism in this utility model;

[0024] Figure 7 This is a schematic diagram of the oblique output tube in this utility model;

[0025] Figure 8 This is a schematic diagram of the hollow hemispherical block in this utility model.

[0026] In the diagram: 1. Water pump; 2. Lower connecting ring; 3. Cast iron cavity; 4. Drive shaft; 5. Impeller; 6. Cleaning mechanism; 61. Connecting pipe; 62. Hollow hemispherical block; 63. Hollow disc block; 64. Inclined output pipe; 65. Filter screen; 7. Crushing mechanism; 71. Connecting seat one; 72. Cutting blade one; 73. Connecting seat two; 74. Cutting blade two. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1 - Figure 8As shown, this utility model provides a technical solution: a self-draining slag structure for the back clearance of a cast iron impeller in an anti-clogging pump, comprising a water pump 1, a lower connecting ring 2 fixedly connected to the bottom of the water pump 1, a cast iron cavity 3 fixedly connected to the bottom of the lower connecting ring 2, a drive shaft 4 mounted on the water pump 1, an impeller 5 fixedly connected to the drive shaft 4, and a cleaning mechanism 6 mounted on the drive shaft 4. The cleaning mechanism 6 includes a connecting pipe 61 fixedly connected to the inner wall of the drive shaft 4, and a hollow hemispherical part fixedly connected to one end of the connecting pipe 61. Block 62, with a hollow disc block 63 rotatably connected to the other end of the connecting pipe 61, has an inclined output pipe 64 fixedly connected to the inner wall of the hollow disc block 63. The inclined output pipe 64 is located in the back clearance of the impeller 5 between the lower connecting ring 2 and the impeller 5. When the drive shaft 4 rotates, it drives the cleaning mechanism 6 to rotate. At this time, during the rotation of the open side of the hollow hemispherical block 62, liquid is input into the hollow disc block 63 through the connecting pipe 61 and then sprayed out through the inclined output pipe 64, forming a self-rotating spray cleaning system. The system can discharge debris or deposits in the back gap using a rotating jet, thus achieving an anti-clogging effect. When the inclined output pipe 64 outputs the jetted liquid, the inclined output pipe 64 will be subjected to a reverse force, causing the hollow disc block 63 to rotate under circumferential force. This causes the liquid output from the inclined output pipe 64 to be sprayed out in a rotating manner, creating a rotating cleaning effect and more efficiently flushing impurities in the back gap of the impeller 5. The hollow disc block 63 and the hollow hemispherical block 62 are connected by a connecting pipe 61. A filter screen 65 is fixedly connected to the outer wall of the hemispherical block 62. The filter screen 65 plays a filtering role, and during the rotation, impurities on the surface are also thrown out, which can prevent large particles of impurities from entering the cleaning mechanism 6. At the same time, it throws out the attached debris during rotation, which has self-cleaning ability. A crushing mechanism 7 is provided on the lower connecting ring 2 and the impeller 5. The crushing mechanism 7 is used to cut the tangled objects. It can cut or shred flexible debris such as plastic bags, grass leaves, and fibers tangled on the impeller 5 or pump body, further preventing blockage.

[0029] The drive shaft 4 is rotatably connected to the inner wall of the lower connecting ring 2. A sealing device is provided between the drive shaft 4 and the lower connecting ring 2 to prevent liquid leakage and improve the overall stability and reliability of the water pump 1. The drive shaft 4 is rotatably connected to the inner wall of the cast iron cavity 3. A sealing device is provided between the drive shaft 4 and the cast iron cavity 3 to improve the internal sealing of the pump body, prevent liquid from seeping out from the rotating shaft, and ensure the safe and reliable operation of the whole machine. Two sets of cleaning mechanisms 6 are provided. The two sets of cleaning mechanisms 6 are arranged in a circumferential array on the drive shaft 4 to avoid the center of gravity from deflection due to unilateral force during the rotation of the drive shaft 4, improve rotational stability, ensure uniform spray direction, and enhance slag discharge effect.

[0030] The crushing mechanism 7 includes a connecting seat 71, which is fixedly connected to the impeller 5. A cutting blade 72 is fixedly connected to the outer wall of the connecting seat 71 to cut impurities that are wrapped around or close to the impeller 5, preventing them from causing rotational obstruction or blockage. A connecting seat 73 is fixedly connected to the bottom of the lower connecting ring 2, and a cutting blade 74 is fixedly connected to the outer wall of the connecting seat 73. The cutting blade 74 is tangent to the cutting blade 72, acting like scissors to cut impurities wrapped around the cutting blade 74 and the cutting blade 72, effectively improving the crushing capacity. The crushing mechanism 7 is symmetrically arranged in two sets to enhance the symmetry of the structure and the cutting coverage, avoid uneven stress on the structure caused by unilateral cutting, and improve the stability of system operation.

[0031] In use, the self-draining slag structure of the cast iron impeller back gap of the anti-clogging pump of this utility model has an inclined output pipe 64 located in the back gap of the impeller 5 between the lower connecting ring 2 and the impeller 5. When the drive shaft 4 rotates, the drive shaft 4 drives the cleaning mechanism 6 to rotate. At this time, during the rotation of the open side of the hollow hemispherical block 62, the liquid is input into the hollow disc block 63 through the connecting pipe 61, and then sprayed out through the inclined output pipe 64, forming a self-rotating spray cleaning system. It can discharge the debris or deposits in the back gap by rotating spray, thereby achieving the anti-clogging effect. When the inclined output pipe 64 outputs the sprayed liquid, the inclined output pipe 64 will be subjected to a reverse force, causing the hollow disc block 63 to be subjected to circumferential force and rotate, so that the liquid output by the inclined output pipe 64 is sprayed out in a rotating manner, so that the sprayed water flow forms a rotating cleaning effect, which more efficiently washes away the impurities in the back gap of the impeller 5.

[0032] When the impeller 5 rotates, it drives the connecting seat 71 and the cutting blade 72 to rotate. The cutting blade 72 cuts the impurities that are wrapped around or close to the impeller 5, preventing the impurities from getting tangled and causing rotational obstruction or blockage. The cutting blade 74 is tangent to the cutting blade 72 and acts like scissors, cutting the impurities wrapped around the cutting blade 74 and the cutting blade 72, effectively improving the crushing capacity.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A back gap slag self-discharge structure for preventing clogging of a pump cast iron impeller, comprising a water pump (1), characterized in that: The bottom of the water pump (1) is fixedly connected to a lower connecting ring (2), and the bottom of the lower connecting ring (2) is fixedly connected to a cast iron cavity (3). A drive shaft (4) is provided on the water pump (1), and an impeller (5) is fixedly connected on the drive shaft (4). A cleaning mechanism (6) is provided on the drive shaft (4), and the cleaning mechanism (6) includes: A connecting pipe (61) is fixedly connected to the inner wall of the drive shaft (4). A hollow hemispherical block (62) is fixedly connected to one end of the connecting pipe (61), and a hollow disc block (63) is rotatably connected to the other end of the connecting pipe (61). An oblique output pipe (64) is fixedly connected to the inner wall of the hollow disc block (63). The hollow disc block (63) and the hollow hemispherical block (62) are connected through the connecting pipe (61). A filter screen (65) is fixedly connected to the outer wall of the hollow hemispherical block (62). The lower connecting ring (2) and the impeller (5) are provided with a crushing mechanism (7), which is used to cut the entangled object.

2. The anti-clogging pump cast iron impeller back gap slag self-discharging structure according to claim 1, characterized in that: The drive shaft (4) is rotatably connected to the inner wall of the lower connecting ring (2), and a sealing device is provided between the drive shaft (4) and the lower connecting ring (2).

3. The anti-clogging pump cast iron impeller back gap slag self-discharging structure according to claim 1, characterized in that: The drive shaft (4) is rotatably connected to the inner wall of the cast iron cavity (3), and a sealing device is provided between the drive shaft (4) and the cast iron cavity (3).

4. The anti-clogging pump cast iron impeller back gap slag self-discharging structure according to claim 1, characterized in that: The cleaning mechanism (6) is provided in two sets, and the two sets of cleaning mechanisms (6) are arranged in a circumferential array on the drive shaft (4).

5. The anti-clogging pump cast iron impeller back gap slag self-discharging structure according to claim 1, characterized in that: The crushing mechanism (7) includes a connecting seat (71), which is fixedly connected to the impeller (5), and a cutting blade (72) is fixedly connected to the outer wall of the connecting seat (71).

6. The anti-clogging pump cast iron impeller back gap slag self-discharging structure according to claim 5, characterized in that: The bottom of the lower connecting ring (2) is fixedly connected to a connecting seat two (73), and the outer wall of the connecting seat two (73) is fixedly connected to a cutting blade two (74).

7. The anti-clogging pump cast iron impeller back gap slag self-discharging structure according to claim 6, characterized in that: The second cutting blade (74) is tangent to the first cutting blade (72), and the crushing mechanism (7) is symmetrically arranged in two sets.

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