Sewage treatment pump of a nursing robot

Abstract

The present invention discloses a sewage treatment pump for a nursing robot, which comprises an upper pump housing and a lower pump housing. The upper pump housing and the lower pump housing are assembled and connected through a cover plate. A pump inner cavity is assembled and arranged in the inner cavity of the lower pump housing. A flexible impeller is installed in the pump inner cavity. A reamer is rotatably connected to the upper end of the cover plate. A plurality of material passing holes are formed in one side of the upper end of the cover plate. A feed pipe head is fixedly connected to the middle of the upper end of the upper pump housing. A driving motor is fixedly connected to the lower end of the lower pump housing. An output end of the driving motor is fixedly connected to a transmission rod. The transmission rod is rotatably connected to the cover plate and the bottom of the pump inner cavity through bearings. The transmission rod is fixedly connected to both the impeller and the reamer. A discharge pipe head is fixedly connected to one side of the lower part of the lower pump housing. A discharge hole is formed in one side of the lower end of the pump inner cavity. In the present invention, the connecting rod and the blade make a reciprocating rotational motion along with the outer cylinder, so as to repeatedly cut the medium blocked in the material passing holes.

Description

Technical Field

[0001] The present invention relates to the technical field of nursing robots, and specifically to a sewage treatment pump for a nursing robot. Background Art

[0002] The sewage treatment pump combines self-priming and non-clogging sewage discharge. It can, like a general clear water self-priming pump, not require a foot valve and priming water, and can also suction large particle solid blocks, fibrous dirt, sediment waste ore impurities, fecal treatment, and all engineering sewage. During the operation of existing self-priming pumps, sundries and impurities in the water will be brought into the interior of the self-priming pump. These sundries and impurities are likely to clog the impeller of the self-priming pump, seriously affecting the normal operation of the self-priming pump and reducing the service life of the self-priming pump.

[0003] For example, Chinese Patent Publication No. CN215719550U discloses an anti-clogging and corrosion-resistant sewage self-priming pump, which includes a self-priming pump main body. The water inlet end of the self-priming pump main body is connected with a treatment box through bolts. The left and right sides of the treatment box are symmetrically provided with chutes. One end of the treatment box away from the self-priming pump main body is provided with a crushing mechanism. The port of the treatment box is connected with a connecting part through bolts. A filtering mechanism is arranged in the treatment box. The filter plate in the filtering mechanism is slidably connected with the treatment box. The left and right sides of the filtering mechanism are symmetrically provided with a shaking mechanism. The cam in the shaking mechanism is rotationally connected with the treatment box through a pin rod. The bottom end of the treatment box is provided with a sewage discharge port through which. The beneficial effect of this utility model is that by using the provided crushing mechanism, sewage enters the treatment box through the connecting part, and through the cooperation between the upper crushing knife roller, the lower crushing knife roller and the fixed knife group, the sundries in the sewage are crushed, reducing the volume of the sundries, thereby reducing the probability of the sundries clogging the self-priming pump.

[0004] In this scheme, the size of the material passing channel from the crushing part to the self-priming bin is relatively large, resulting in the final discharged dirt passing through the self-priming bin without sufficient crushing; due to unreasonable design, the material passing channel is too large and located on the side wall, and when the flexed impeller passes by, it suddenly deforms and expands and impacts the side wall, generating very large vibrations and noises. Summary of the Invention

[0005] The purpose of the present invention is to provide a sewage treatment pump for a nursing robot to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The sewage treatment pump of the nursing robot includes an upper pump body shell and a lower pump body shell. The upper pump body shell and the lower pump body shell are assembled and connected through a cover plate. A pump inner cavity is assembled in the inner cavity of the lower pump body shell. A flexible impeller is installed in the pump inner cavity. A reamer is rotatably connected to the upper end of the cover plate. A plurality of material passing holes are opened on one side of the upper end of the cover plate. The middle part of the upper end of the upper pump body shell is fixedly connected with a feed pipe head. The lower end of the lower pump body shell is fixedly connected with a driving motor. The output end of the driving motor is fixedly connected with a transmission rod. The transmission rod is rotatably connected to the cover plate and the bottom of the pump inner cavity through bearings. The transmission rod is fixedly connected to both the impeller and the reamer. One side of the lower part of the lower pump body shell is fixedly connected with a discharge pipe head. A discharge hole is opened on one side of the lower end of the pump inner cavity.

[0008] As a further scheme of the present invention: The reamer blade has serrations and is arranged in three layers. There is a tiny gap between the bottom layer blade and the cover plate.

[0009] As a further scheme of the present invention: A cutting mechanism for reciprocally cutting the side of the material passing hole away from the pump inner cavity is arranged in the pump inner cavity. The cutting mechanism includes a blade. The lower end of the blade is fixedly connected with a connecting rod. One end of the connecting rod is slidably connected to the pump inner cavity. A balance groove for cooperating with the connecting rod is opened on one side of the upper end of the pump inner cavity. A reciprocating structure for driving the blade to rotate is arranged at the end of the connecting rod away from the balance groove.

[0010] As a further scheme of the present invention: The number of the blades corresponds to the number of the material passing holes. A plurality of chutes for cooperating with the blades are opened in the middle of the material passing holes. A plurality of material passing holes with the same distance from the center position of the cover plate are penetrated by one chute.

[0011] As a further scheme of the present invention: The reciprocating mechanism includes an inner cylinder. An inclined circular groove is opened on the outer wall of the inner cylinder. An outer cylinder is sleeved on the outer wall of the inner cylinder. The connecting rod is fixedly connected with one side of the upper part of the outer cylinder. The outer cylinder is attached to the lower end face of the cover plate. The outer cylinder is rotatably connected to the inner cylinder. The outer wall of the outer cylinder is rotatably connected with a housing. An arc groove is opened on the outer wall of the outer cylinder. The arc groove is aligned with one side of the inclined circular groove. A driven key is slidably connected to the arc groove and the inclined circular groove together. A transmission mechanism for driving the outer cylinder and the inner cylinder to rotate is arranged at the bottom of the inner cavity of the housing.

[0012] As a further scheme of the present invention: The driven key is composed of an inclined round rod and a slider. A guide groove for cooperating with the slider is opened on the side wall of the inner cavity of the housing. The guide groove is a groove in the vertical direction. The end of the inclined round rod away from the slider passes through the arc groove and fits with the inclined circular groove.

[0013] As a further solution of the present invention: symmetric fixing rods are fixedly connected to the upper part of the inner cavity of the pump body, one end of the outer wall of the housing away from the side wall of the inner cavity of the pump body is fixedly connected to the fixing rods, a transmission rod is rotatably connected to the middle of the lower end of the housing, and the housing is arranged between the cover plate and the flexible impeller.

[0014] As a further solution of the present invention: the transmission mechanism includes a first gear fixedly connected to the outer wall of the transmission rod, a second gear is meshed and connected to one side of the first gear, a rotating rod is rotatably connected to the middle of the upper end of the second gear, one end of the rotating rod away from the second gear is fixedly connected to the bottom of the inner cavity of the housing, a toothed ring is meshed and connected to the side of the second gear away from the first gear, the toothed ring is rotatably connected to the bottom of the inner cavity of the housing, and the toothed ring is fixedly connected to the bottom of the inner cylinder.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The inner cavity of the pump body adopts a cylindrical cavity. By eccentrically installing with the flexible impeller, the impeller can smoothly flex and deform. During the entire rotation period, the blades are in the deformation process, which prolongs the deformation process, can effectively reduce the fatigue of the blades, and extend the service life of the impeller. And the feed hole and the discharge hole are respectively arranged at the upper and lower parts of the inner cavity of the pump body, preventing the impact during the deformation of the blades, greatly reducing the vibration and noise, and the inner cavity of the pump body is easy to manufacture, reducing the manufacturing cost.

[0017] By setting the combined use of the cutting mechanism and the transmission mechanism, it can effectively prevent some media that are not completely cut by the reamer from being blocked in the material passing hole due to suction. The rotation speed of the transmission rod is reduced through the cooperation of the first gear, the second gear and the toothed ring, so that the device runs more smoothly. At the same time, the inclined circular groove on the inner cylinder and the arc-shaped groove on the outer cylinder cooperate with the driven key to make the connecting rod and the blade make a reciprocating rotational motion along with the outer cylinder, so as to repeatedly cut the media blocked in the material passing hole, effectively reducing the possibility of the material passing hole being blocked by the media. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic sectional structure diagram of the whole in the present invention.

[0020] Figure 3 It is a schematic exploded structure diagram of the present invention.

[0021] Figure 4 It is a schematic structure diagram of the crushing bin in the present invention.

[0022] Figure 5 It is a schematic structure diagram of the impeller in the present invention.

[0023] Figure 6This is a schematic cross-sectional structure diagram of the inner cavity of the pump in the present invention.

[0024] Figure 7 This is a schematic structure diagram of the cutting mechanism in the present invention.

[0025] Figure 8 This is a schematic structure diagram of the cover plate in the present invention.

[0026] Figure 9 This is a schematic cross-sectional structure diagram of the cutting mechanism in the present invention.

[0027] Figure 10 This is a schematic explosion structure diagram of the reciprocating structure in the present invention.

[0028] Figure 11 This is a schematic diagram of the connection relationship between the inner cylinder and the tooth ring in the present invention.

[0029] Figure 12 This is a schematic structure diagram of the transmission mechanism in the present invention.

[0030] In the figure: 1. Upper shell of the pump body; 2. Reamer; 3. Cover plate; 31. Material passing hole; 32. Slide groove; 4. Inner cavity of the pump body; 41. Discharge hole; 42. Balance groove; 43. Fixed rod; 5. Impeller; 6. Lower shell of the pump body; 61. Discharge pipe head; 7. Driving motor; 8. Bearing; 9. Transmission rod; 10. Cutting mechanism; 101. Outer shell; 102. Guide groove; 103. Driven key; 104. Outer cylinder; 105. Inner cylinder; 106. Arc groove; 107. Oblique circular groove; 108. Connecting rod; 109. Blade; 11. Feed pipe head; 12. Transmission mechanism; 121. First gear; 122. Second gear; 123. Rotating rod; 124. Tooth ring. Embodiment

[0031] Please refer to Figures 1-5, in the embodiment of the present invention, the sewage treatment pump of the nursing robot includes a pump body upper shell 1 and a pump body lower shell 6. The pump body upper shell 1 and the pump body lower shell 6 are assembled and connected through a cover plate 3. Flanges are provided at the corresponding openings of the pump body upper shell 1 and the pump body lower shell 6, and they are assembled and connected through bolts. A pump body inner cavity 4 is assembled in the inner cavity of the pump body lower shell 6. A flexible impeller 5 is installed in the pump body inner cavity 4. In this embodiment, the space between the inner cavity of the pump body upper shell 1 and the upper end face of the cover plate 3 together forms a crushing chamber. A reamer 2 is rotatably connected to the upper end of the cover plate 3. Preferably, the structure of the reamer 2 is a three-layer eight-leaf three-dimensional serrated knife. A number of material passing holes 31 are opened on one side of the upper end of the cover plate 3. The pump body upper shell 1 communicates with the pump body inner cavity 4 through the material passing holes 31. The cover plate 3 is integrally formed by stainless steel stamping. The aperture of the material passing holes 31 can be customized according to the use environment. Only the medium smaller than the aperture can pass through the material passing holes 31 and be discharged after being crushed. A feed pipe head 11 is fixedly connected to the middle of the upper end of the pump body upper shell 1. The feed pipe head 11 is a part of the pipe section of the pump body upper shell 1. The feed pipe head 11 is connected to a water source (such as a sewage tank). A driving motor 7 is fixedly connected to the lower end of the pump body lower shell 6. There are tiny gaps between the two end faces of the impeller 5 and the bottom surface of the pump body inner cavity 4 and the cover plate 3. There are two seals between the pump body inner cavity 4 and the driving motor 7. The connection between the pump body inner cavity 4 and the driving motor 7 is sealed through a sealing ring. The output end of the driving motor 7 is fixedly connected to a transmission rod 9. The transmission rod 9 is rotatably connected to the cover plate 3 and the bottom of the pump body inner cavity 4 through bearings 8. The transmission rod 9 is fixedly connected to both the impeller 5 and the reamer 2. A discharge pipe head 61 is fixedly connected to one side of the lower part of the pump body lower shell 6. The discharge pipe head 61 is a part of the pipe section of the pump body lower shell 6. The discharge pipe head 61 is connected to a sewer. The space between the lower end faces of the pump body lower shell 6 and the cover plate 3 forms a self-priming chamber. A discharge hole 41 is opened on one side of the lower end of the pump body inner cavity 4. Among them, the material passing holes 31 are located on the cover plate 3 above the pump body inner cavity 4. The pump body inner cavity 4 is integrally formed by stainless steel stamping. Its cylindrical cavity is eccentrically installed with the flexible impeller 5.

[0032] During use, the driving motor 7 drives the flexible impeller 5 to rotate, so that the blades generate periodic flexure, creating a vacuum in the pump body inner cavity 4 to suck in the medium. The medium of the water source enters the pump body upper shell 1 through the feed pipe head 11 and is crushed by the reamer 2 in the inner cavity of the pump body upper shell 1. After passing through the material passing holes 31 on the cover plate 3 and entering the pump body inner cavity 4, it enters the discharge pipe head 61 through the discharge hole 41 and flows into the sewer to discharge the medium.

[0033] Please refer to Figures 6-8, a cutting mechanism 10 for reciprocally cutting the side of the material passing hole 31 away from the inner cavity 4 of the pump body is arranged in the inner cavity 4 of the pump body. The cutting mechanism 10 includes a blade 109. The lower end of the blade 109 is fixedly connected with a connecting rod 108. One end of the connecting rod 108 is slidably connected with the inner cavity 4 of the pump body. A balance groove 42 for cooperating with the connecting rod 108 is opened on one side of the upper end of the inner cavity 4 of the pump body. One end of the connecting rod 108 away from the balance groove 42 is provided with a reciprocating structure for driving the blade 109 to rotate. The number of the blades 109 corresponds to that of the material passing holes 31. A plurality of chutes 32 for cooperating with the blades 109 are opened in the middle of the material passing holes 31. A plurality of material passing holes 31 with the same distance to the center position of the cover plate 3 are penetrated by one chute 32. That is, when the connecting rod 108 rotates along with the reciprocating mechanism, the balance groove 42 can provide stable support for the end of the connecting rod 108 away from the outer cylinder 104, so that the connecting rod 108 rotates more smoothly. The blade 109 reciprocates along with the connecting rod 108, so that the blade 109 can continuously reciprocate in the chute 32 and cut the blocked medium in the material passing hole 31, thereby facilitating the medium to pass through the material passing hole 31.

[0034] Please refer to Figures 9-11 , the reciprocating mechanism includes an inner cylinder 105. An inclined circular groove 107 is opened on the outer wall of the inner cylinder 105. An outer cylinder 104 is sleeved on the outer wall of the inner cylinder 105. The connecting rod 108 is fixedly connected with one side of the upper part of the outer cylinder 104. The outer cylinder 104 is attached to the lower end surface of the cover plate 3. The outer cylinder 104 is rotatably connected with the inner cylinder 105. The outer wall of the outer cylinder 104 is rotatably connected with a housing 101. An arc groove 106 is opened on the outer wall of the outer cylinder 104. The arc groove 106 is aligned with one side of the inclined circular groove 107. A driven key 103 is slidably connected with the arc groove 106 and the inclined circular groove 107 together. When the device is not running, the driven key 103 is located at the bottom end of the inclined circular groove 107, that is, the end of the arc groove 106. The driven key 103 is composed of an inclined round rod and a slider. A guide groove 102 for cooperating with the slider is opened on the side wall of the inner cavity of the housing 101. The guide groove 102 is a groove in the vertical direction. One end of the inclined round rod away from the slider passes through the arc groove 106 and fits with the inclined circular groove 107.

[0035] Symmetric fixing rods 43 are fixedly connected to the upper part of the inner cavity 4 of the pump body. The outer wall of the housing 101 is fixedly connected with the end of the fixing rod 43 away from the side wall of the inner cavity 4 of the pump body. A transmission rod 9 is rotatably connected to the middle of the lower end of the housing 101. The housing 101 is arranged between the cover plate 3 and the flexible impeller 5. A transmission mechanism 12 for driving the outer cylinder 104 and the inner cylinder 105 to rotate is arranged at the bottom of the inner cavity of the housing 101.

[0036] Please refer to Figure 12, The transmission mechanism 12 includes a first gear 121. The first gear 121 is fixedly connected to the outer wall of the transmission rod 9. One side of the first gear 121 is meshed with a second gear 122. The middle of the upper end of the second gear 122 is rotatably connected to a rotating rod 123. One end of the rotating rod 123 away from the second gear 122 is fixedly connected to the bottom of the inner cavity of the housing 101. The side of the second gear 122 away from the first gear 121 is meshed with a toothed ring 124. The toothed ring 124 is rotatably connected to the bottom of the inner cavity of the housing 101. The upper end of the toothed ring 124 is fixedly connected to an inner cylinder 105. By indirectly driving the toothed ring 124 to rotate through the second gear 122, the rotation speed of the transmission rod 9 can be effectively reduced, avoiding the too high rotation frequency caused by directly driving the inner cylinder 105 through the first gear 121, thus preventing the unstable operation of the device.

[0037] That is, when the transmission rod 9 drives the first gear 121 to rotate clockwise, the first gear 121 will drive the second gear 122 to rotate counterclockwise around the rotating rod 123, and the second gear 122 will drive the toothed ring 124 to rotate counterclockwise. The toothed ring 124 will drive the inner cylinder 105 to rotate counterclockwise. At this time, a relative movement occurs between the inclined circular groove 107 and the follower. Under the action of the guiding groove 102, the driven key 103 only moves in the vertical direction. During its movement, the vertical rise of the inclined circular rod will drive the outer cylinder 104 to rotate clockwise around the inner cylinder 105 through the arc-shaped groove 106. During the process of the inner cylinder 105 and the outer cylinder 104 rotating in opposite directions respectively, the driven key 103 also continuously rises until the slider moves to the top of the guiding groove 102. At this time, the inclined circular rod also moves to the top of the inclined circular groove 107, and the head end of the arc-shaped groove 106 coincides with the top of the inclined circular groove 107. At this time, both the inner cylinder 105 and the outer cylinder 104 have rotated half a circle, and at this time the arc-shaped groove 106 and the inclined circular groove 107 are fitted and aligned. As the transmission rod 9 continues to rotate, the inner cylinder 105 also continues to rotate counterclockwise. At this time, the driven key 103 makes a descending movement from the top to the bottom in the inclined circular groove 107. Since the arc-shaped groove 106 is aligned with one side of the inclined circular groove 107, during the vertical descent of the driven key 103, the outer cylinder 104 rotates counterclockwise along with the inner cylinder 105 until the inclined circular rod moves back to the bottom of the inclined circular groove 107 and continuously rotates back and forth as the transmission rod 9 rotates.

Claims

1. The sewage treatment pump of a nursing robot, comprising an upper pump body shell and a lower pump body shell, characterized in that, the upper pump body shell and the lower pump body shell are assembled and connected through a cover plate. A pump inner cavity is assembled and arranged in the inner cavity of the lower pump body shell. A flexible impeller is installed in the pump inner cavity. A reamer is rotatably connected to the upper end of the cover plate. A plurality of material passing holes are formed in one side of the upper end of the cover plate. A feed pipe head is fixedly connected to the middle of the upper end of the upper pump body shell. A driving motor is fixedly connected to the lower end of the lower pump body shell. A transmission rod is fixedly connected to the output end of the driving motor. The transmission rod is rotatably connected to the cover plate and the bottom of the pump inner cavity through bearings. The transmission rod is fixedly connected to both the impeller and the reamer. A discharge pipe head is fixedly connected to one side of the lower part of the lower pump body shell. A discharge hole is formed in one side of the lower end of the pump inner cavity; a cutting mechanism for reciprocally cutting the side of the material passing hole away from the pump inner cavity is arranged in the pump inner cavity. The cutting mechanism comprises a blade. A connecting rod is fixedly connected to the lower end of the blade. One end of the connecting rod is slidably connected to the pump inner cavity. A balance groove for cooperating with the connecting rod is formed in one side of the upper end of the pump inner cavity. A reciprocating mechanism for driving the blade to rotate is arranged at the end of the connecting rod away from the balance groove; the reciprocating mechanism comprises an inner cylinder. An inclined circular groove is formed in the outer wall of the inner cylinder. An outer cylinder is sleeved on the outer wall of the inner cylinder. The connecting rod is fixedly connected to one side of the upper part of the outer cylinder. The outer cylinder is in contact with the lower end surface of the cover plate. The outer cylinder is rotatably connected to the inner cylinder. An outer shell is rotatably connected to the outer wall of the outer cylinder. An arc groove is formed in the outer wall of the outer cylinder. The arc groove is aligned with one side of the inclined circular groove. A driven key is slidably connected to the arc groove and the inclined circular groove together. A transmission mechanism for driving the outer cylinder and the inner cylinder to rotate is arranged at the bottom of the inner cavity of the outer shell; the driven key is composed of an inclined circular rod and a slider. A guide groove for cooperating with the slider is formed in the side wall of the inner cavity of the outer shell. The guide groove is a groove in the vertical direction. The end of the inclined circular rod away from the slider passes through the arc groove and fits with the inclined circular groove.

2. The sewage treatment pump of a nursing robot according to claim 1, characterized in that, the blade of the reamer is serrated and arranged in three layers. There is a tiny gap between the bottommost blade and the cover plate.

3. The sewage treatment pump of a nursing robot according to claim 1, characterized in that, the number of the blades corresponds to the number of the material passing holes. A plurality of chutes for cooperating with the blades are formed in the middle of the material passing holes. A plurality of the material passing holes at the same distance from the center position of the cover plate are penetrated by one chute.

4. The sewage treatment pump of a nursing robot according to claim 1, characterized in that, symmetric fixing rods are fixedly connected to the upper part of the pump inner cavity. The outer wall of the outer shell is fixedly connected to the end of the fixing rod away from the side wall of the pump inner cavity. A transmission rod is rotatably connected to the middle of the lower end of the outer shell. The outer shell is arranged between the cover plate and the flexible impeller.

5. The sewage treatment pump of a nursing robot according to claim 4, characterized in that, The transmission mechanism includes a first gear, the first gear is fixedly connected to the outer wall of the transmission rod, a second gear is meshed and connected to one side of the first gear, a rotating rod is rotatably connected to the middle of the upper end of the second gear, the end of the rotating rod away from the second gear is fixedly connected to the bottom of the inner cavity of the housing, a toothed ring is meshed and connected to the side of the second gear away from the first gear, the toothed ring is rotatably connected to the bottom of the inner cavity of the housing, and the toothed ring is fixedly connected to the bottom of the inner cylinder.

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