Feed inlet structure of screw pump

Abstract

The utility model discloses a feed port structure of a screw pump. The feed port structure of the screw pump comprises a pump body, a feed cylinder, a driving unit and two groups of symmetrically arranged material conveying and mixing units, the feeding cylinder is driven by the pneumatic motor to rotate through the gear transmission mechanism, the conveying mixing units on the two sides are connected with the medicine injection opening, the blade plates on the conveying belt are preliminarily mixed with the medicine in the fluid conveying process, and it is guaranteed that the fluid and the medicine are fully mixed before entering the pump body. The spiral raised lines and the sawteeth in the feeding cylinder further improve the mixing effect, and the device is suitable for treating high-viscosity fluid and fluid transmission scenes in which chemicals need to be added. And the blade plates are made of wear-resistant and corrosion-resistant materials and are suitable for corrosive environments such as industrial wastewater treatment, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of fluid conveying equipment, in particular to a feed port structure of a screw pump. Background Art

[0002] The earliest prototype and principle of screw pumps is the Archimedean screw proposed by Archimedes. Screw pumps use the rotation of the screw to transport fluid media. They are rotor-type positive displacement pumps and are suitable for conveying high-viscosity fluids, solid suspensions, and highly abrasive slurries.

[0003] When screw pumps are used to transport fluids, they often require pretreatment. For example, in water purification, chemicals such as flocculants, coagulants, or disinfectants are often added to optimize treatment effectiveness. Traditionally, these chemicals have been injected directly into the fluid pipeline during the pump's transport process. However, this method of addition can easily lead to uneven mixing of the chemicals and the fluid, compromising treatment effectiveness.

[0004] Therefore, it is urgent to design a screw pump feed port structure. Utility Model Content

[0005] The purpose of the utility model is to provide a screw pump feed port structure, which can fully mix the medicine and the fluid and prevent the occurrence of uneven mixing of the chemical medicines.

[0006] The technical solution adopted by the present invention to solve the above problems is: a screw pump feed port structure, including a pump body, a feed barrel is rotatably arranged on the pump body and a driving unit for driving the feed barrel to rotate is provided, two groups of feeding and mixing units are symmetrically arranged on both sides of the feed barrel, and a medicine injection port is provided above the feeding and mixing unit.

[0007] Preferably, the driving unit adopts a pneumatic motor, which drives the feed barrel to rotate through a gear transmission mechanism.

[0008] Preferably, the gear transmission mechanism includes a driving gear axially connected to the pneumatic motor and an outer gear ring arranged at the lower end of the feed barrel, and the driving gear is meshed with the outer gear ring.

[0009] Preferably, the feeding and mixing unit comprises a vertically arranged conveyor belt, with two sets of transmission wheels provided at the upper and lower ends of the conveyor belt, and the transmission wheel shaft at the upper end is connected to a driving motor for driving the rotation thereof, and a plurality of sets of blades are arranged at equal intervals on the outer side of the conveyor belt.

[0010] Preferably, the feeding and mixing unit further comprises a shell arranged outside the conveyor belt, the inner wall surface of the shell is tangent to the outer edge of the blade on the conveyor belt when the conveyor belt is running, and the shell is open toward the inner side surface of the feed barrel.

[0011] Preferably, the inner wall surface of the feed barrel is provided with a spiral ridge, and the outer surface of the spiral ridge is arranged with a plurality of groups of saw teeth.

[0012] Preferably, the blades are made of wear-resistant and corrosion-resistant materials.

[0013] Compared with the prior art, the present invention has the following advantages and effects:

[0014] The utility model provides feeding and mixing units on both sides of the feed barrel, so that the medicine can be preliminarily mixed before entering the pump body, ensuring the uniform dispersion of the medicine. At the same time, the conveyor belt and blade design in the feeding and mixing unit continuously stir the fluid and medicine during the conveying process, making the mixing more complete. The feed barrel is driven to rotate by the driving unit, and the spiral ribs and serrations inside it cooperate to enhance the mixing effect of the fluid and the medicine. This structure is suitable for processing high-viscosity fluids and adding chemical agents such as flocculants, coagulants, disinfectants, etc., which improves the pretreatment efficiency of processes such as water purification and chemical agent addition. In addition, the blades are made of wear-resistant and corrosion-resistant materials, which adapt to the processing needs of various corrosive agents and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of a screw pump feed port structure according to an embodiment of the present utility model.

[0016] Figure 2 This is a front view of a screw pump feed port structure according to an embodiment of the present utility model.

[0017] Figure 3 It is a cross-sectional view of a screw pump feed port structure according to an embodiment of the present invention.

[0018] Figure numbers: pump body 11, feed barrel 12, drive unit 13, material feeding and mixing unit 14, injection port 15, gear transmission mechanism 21, drive gear 22, outer ring gear 23, conveyor belt 31, transmission wheel 32, drive motor 33, blade 34, shell 35, spiral rib 41, serration 42. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0020] Example: See Figure 1 - Figure 3This embodiment relates to a screw pump feed port structure, specifically used for efficient mixing and uniform delivery of pharmaceuticals during fluid delivery. It is primarily used in water purification, chemical addition, and the delivery of high-viscosity fluids. Specifically, it includes a pump body 11, on which a feed barrel 12 is rotatably mounted, and a drive unit 13 is provided for driving the feed barrel 12. Two sets of feeding and mixing units 14 are symmetrically disposed on either side of the feed barrel 12, and a drug injection port 15 is provided above each feeding and mixing unit 14.

[0021] Specifically, in this embodiment, two groups of feeding and mixing units 14 are symmetrically arranged on both sides of the feeding barrel 12, and an injection port 15 is configured above the feeding and mixing unit 14. During the fluid transportation process, chemical agents (such as flocculants, coagulants or disinfectants) enter from the injection port 15 and are preliminarily mixed with the fluid, so that the agents can begin to disperse before the fluid enters the pump body 11. After the chemical agents are input, the feeding barrel 12 is driven to rotate by the drive unit 13, and the continuous rotation of the feeding barrel 12 causes the added chemical agents to mix with the fluid. In this structure, the chemical agents added through the injection port 15 are mixed with the fluid through the feeding and mixing unit 14 and the rotation of the feeding barrel 12, avoiding the uneven mixing caused by directly injecting the agent into the fluid pipeline in the traditional method. In this embodiment, the drive unit 13 adopts an air motor, which is mainly used to drive the rotation of the feeding barrel 12. Specifically, the air motor drives the feeding barrel 12 to rotate through the gear transmission mechanism 21. The pneumatic motor is connected to the drive gear 22 in the gear transmission mechanism 21 by a shaft connection, and the drive gear 22 is engaged with the outer ring gear 23 provided at the lower end of the feed barrel 12. When the pneumatic motor is started, its rotational motion is transmitted to the outer ring gear 23 through the gear transmission mechanism 21, thereby driving the entire feed barrel 12 to rotate.

[0022] See also Figure 3 The feeding and mixing unit 14 includes a vertically arranged conveyor belt 31. Two sets of drive wheels 32 are installed at the upper and lower ends of the conveyor belt 31. The upper drive wheel 32 is connected to a drive motor 33 to drive its rotation. Several sets of paddles 34 are evenly spaced on the outer side of the conveyor belt 31. Specifically, the chemical enters the feeding and mixing unit 14 through the injection port 15. The drive wheels 32, driven by the drive motor 33, drive the conveyor belt 31 to circulate and mix. The paddles 34 on the conveyor belt 31 also provide stirring during the chemical conveying process. As the conveyor belt 31 moves, the paddles 34 continuously stir the fluid and chemical, allowing them to contact and mix during conveyance. The paddles 34 are evenly spaced. The chemical is injected through the upper injection port 15. After the chemical and fluid are initially mixed, they are pushed by the paddles 34 in multiple streams. The initial mixed liquid is then sequentially fed into the feed barrel 12, where it is then rotated and mixed. This improves the mixing effect and effectively prevents the accumulation of chemical at the bottom of the feed barrel 12.

[0023] In this embodiment, the feeding and mixing unit 14 further includes a housing 35 disposed outside the conveyor belt 31. The housing 35 is designed to closely match the blades 34 of the conveyor belt 31. The inner wall of the housing 35 is tangent to the outer edge of the blades 34 when the conveyor belt 31 is in operation, forming a plurality of enclosed spaces, which effectively prevents the chemical agent from overflowing into the feed barrel 12 without mixing. The housing 35 is open to the inner side of the feed barrel 12, and the fluid and chemical agent enter the feed barrel 12 only after mixing.

[0024] The inner wall surface of the feed barrel 12 is provided with a spiral rib 41, and the outer surface of the spiral rib 41 is arranged with several groups of serrations 42. When the feed barrel 12 is driven to rotate by the driving unit 13, the fluid and the medicine enter the inside of the feed barrel 12 from the feeding and mixing unit 14, and the fluid moves forward along the path of the spiral rib 41. The feed barrel 12 rotates, so that the fluid moves along the barrel wall in a rotating and ascending motion trajectory, thereby increasing the flow rate of the fluid. In addition, the serrations 42 arranged on the outer surface of the spiral rib 41 play a role in further stirring and dispersing. When the feed barrel 12 rotates, the fluid inside it collides with the contact rib under the action of centrifugal force. At this time, the fluid is subjected to tiny cutting and disturbance by the serrations 42, thereby aggravating the turbulence inside the fluid and making the fluid and the medicine more strongly mixed in the local area. In addition, since some of the chemical agents added during the pretreatment process are corrosive to a certain extent, for example, when treating industrial wastewater, acidic additives (such as sulfuric acid and hydrochloric acid) need to be injected for the acidification process in the chemical reaction or for cleaning the scale in the pipeline. After the treatment, alkaline additives (such as sodium hydroxide and ammonia water) need to be injected to neutralize the acidic waste liquid. The above treatment process tests the durability of the feeding and mixing unit 14. In this embodiment, the blade 34 is made of wear-resistant and corrosion-resistant materials, such as a ceramic coating on the outer surface of stainless steel. The blade 34 has good wear resistance and corrosion resistance as a whole, and can effectively alleviate the debris generated by wear during the stirring process of the blade 34 from mixing into the fluid.

[0025] The above contents described in this specification are merely examples of the present invention. Those skilled in the art of the present invention may make various modifications, additions, or substitute similar methods to the specific embodiments described, as long as they do not deviate from the contents of this specification or exceed the scope defined by the claims, and shall fall within the scope of protection of the present invention.

Claims

1. A screw pump feed inlet structure, characterized in that: It comprises a pump body, on which a feed barrel is rotatably mounted and a driving unit for driving the feed barrel to rotate is provided. Two groups of feeding and mixing units are symmetrically arranged on both sides of the feed barrel, and a drug injection port is provided above the feeding and mixing units.

2. A screw pump feed port structure according to claim 1, characterized in that: The driving unit adopts an air motor, which drives the feed barrel to rotate through a gear transmission mechanism.

3. A screw pump feed port structure according to claim 2, characterized in that: The gear transmission mechanism comprises a driving gear axially connected to the pneumatic motor and an outer gear ring arranged at the lower end of the feed barrel, and the driving gear is meshed with the outer gear ring.

4. The feed port structure of a screw pump according to claim 1, characterized in that: The feeding and mixing unit includes a vertically arranged conveyor belt, with two sets of transmission wheels at the upper and lower ends of the conveyor belt, and the transmission wheel shaft at the upper end is connected to a driving motor for driving it to rotate, and several sets of blades are arranged at equal intervals on the outside of the conveyor belt.

5. The feed port structure of a screw pump according to claim 4, characterized in that: The feeding and mixing unit further comprises a shell arranged outside the conveyor belt, the inner wall of the shell is tangent to the outer edge of the blade on the conveyor belt when the conveyor belt is running, and the shell is open toward the inner side of the feed barrel.

6. The feed port structure of a screw pump according to claim 1, characterized in that: The inner wall surface of the feeding barrel is provided with a spiral convex strip, and the outer surface of the spiral convex strip is arranged with a plurality of groups of saw teeth.

7. The feed port structure of a screw pump according to claim 5, characterized in that: The blades are made of wear-resistant and corrosion-resistant materials.

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