阅读说明：本技术 用于热镀作业的抽液泵及其使用方法 (Liquid pump for hot-dip operation and use method thereof ) 是由 向忠文 于 2019-09-30 设计创作，主要内容包括：本发明涉及用锌或镉或以其为基的合金熔融态覆层材料且不影响形状的热浸镀工艺其所用的设备领域,具体为一种用于热镀作业的抽液泵及其使用方法。一种用于热镀作业的抽液泵,包括泵壳(1)和叶轮(2),其特征是：还包括过滤腔体(3)、支撑架(4)、轴承座(5)、起吊架(6)、电机(7)、联轴器(8)和传动轴(9),泵壳(1)的底部连接过滤腔体(3)；电机(7)的输出轴通过联轴器(8)连接传动轴(9)的顶端,传动轴(9)的底端连接叶轮(2)。一种用于热镀作业的抽液泵的使用方法,其特征是：按如下步骤依次实施：①抽液；②过滤。本发明使用寿命长,适用范围广,生产效率高。(The invention relates to the field of hot dip coating technology which uses zinc or cadmium or alloy molten state cladding material based on the zinc or cadmium and does not influence the shape and equipment used by the hot dip coating technology, in particular to a liquid suction pump for hot dip coating operation and a using method thereof. A liquid pump for hot dipping operation comprises a pump shell (1) and an impeller (2), and is characterized in that: the device also comprises a filtering cavity (3), a support frame (4), a bearing seat (5), a lifting frame (6), a motor (7), a coupler (8) and a transmission shaft (9), wherein the bottom of the pump shell (1) is connected with the filtering cavity (3); the output shaft of the motor (7) is connected with the top end of the transmission shaft (9) through the coupler (8), and the bottom end of the transmission shaft (9) is connected with the impeller (2). A use method of a liquid pump for hot dipping operation is characterized in that: the method is implemented in sequence according to the following steps: firstly, extracting liquid; filtering. The invention has long service life, wide application range and high production efficiency.)

1. The utility model provides a drawing liquid pump for hot dipping operation, includes pump case (1) and impeller (2), and impeller (2) are located in pump case (1), characterized by: also comprises a filtering cavity (3), a supporting frame (4), a bearing seat (5), a lifting frame (6), a motor (7), a coupling (8) and a transmission shaft (9),

the bottom of the pump shell (1) is connected with a filtering cavity (3) through a pump shell flange (11), a filtering hole (31) is arranged in the filtering cavity (3), and the side surface of the pump shell (1) is connected with a transfusion tube (12);

the bottom mounting of support frame (4) is on the top of pump case (1), the bottom mounting of bearing frame (5) is on the top of support frame (4), be equipped with end bearing (51) in bearing frame (5), play gallows (6) and fix the top in bearing frame (5), motor (7) are located in gallows (6), the output shaft of motor (7) passes through the top that shaft coupling (8) connect transmission shaft (9), the upper portion in transmission shaft (9) is established to end bearing (51) hoop, support frame (4) are worn to locate in transmission shaft (9), impeller (2) is connected to the bottom of transmission shaft (9).

The liquid pump for hot-dip operation is characterized in that: the support frame (4) is formed by sequentially splicing at least two sections of support units (41) through support flanges (42), a support bearing (43) is arranged at the joint of the two adjacent sections of support units (41), the outer ring of the support bearing (43) is hooped in the flange necks of the two support flanges (42), the inner ring of the support bearing (43) is hooped on the transmission shaft (9), two end faces of the support bearing (43) are respectively covered by an annular pressure plate (44), and the two pressure plates (44) are respectively connected with one support flange (42) through bolt-nut assemblies.

2. The liquid suction pump for hot dipping work according to claim 1, wherein:

the pump shell (1), the impeller (2) and the filtering cavity (3) are all made of 316L stainless steel, and the aperture of the filtering hole (31) in the filtering cavity (3) is not more than 12 mm;

the end bearing (51) and the middle bearing (43) are both ceramic bearings;

a soft starter is arranged on the motor (7).

3. The use method of the liquid suction pump for hot dipping work according to claim 1 or 2, wherein: the method is implemented in sequence according to the following steps:

liquid extraction: the filtering cavity (3) is immersed in a metal pot for containing liquid metal and is arranged below the liquid level of the liquid metal, a motor (7) is started, the motor (7) drives a transmission shaft (9) to rotate through a coupler (8) so as to drive an impeller (2) to rotate, and the impeller (2) rotates to generate suction to suck the liquid metal;

filtering: the sucked liquid metal is filtered by the filtering holes (31) of the filtering cavity (3), the metal slag mixed in the liquid metal is blocked outside the filtering cavity (3) by the filtering holes (31), and the filtered liquid metal flows through the filtering cavity (3) and the pump shell (1) in sequence and then is output from the infusion tube (12).

Technical Field

The invention relates to the field of hot dip coating technology which uses zinc or cadmium or alloy molten state cladding material based on the zinc or cadmium and does not influence the shape and equipment used by the hot dip coating technology, in particular to a liquid suction pump for hot dip coating operation and a using method thereof.

Background

Steel is a metal material which is currently most widely used in the world, but steel is easily corroded in air, water or soil, so that corrosion prevention treatment of steel is required. There are many methods for preventing corrosion of steel, among which the method for coating a protective layer on the surface of steel is the most common method, and since zinc and aluminum have good corrosion resistance in the atmosphere and are relatively cheap, the zinc layer and the zinc-aluminum layer are used to protect steel with low cost and good effect, which promotes the development of hot-dip coating industry.

The hot dipping operation is performed in a metal pot, liquid plating metal such as zinc liquid and zinc-aluminum liquid is contained in the metal pot, and after a period of operation, more bottom slag and scum are generated in the metal pot, so that the metal pot needs to be maintained at intervals to remove the bottom slag. When the bottom slag or the leakage of the metal pot is removed, the high-temperature liquid metal in the metal pot needs to be scooped out completely, and then the bottom slag and the leakage are removed by using a tool. If the whole high-temperature liquid metal is scooped out from the metal pot by a manual method, the time and the labor are consumed, and the danger coefficient is high. Therefore, the use of an infusion pump is a time and labor saving approach. Taking hot galvanizing operation as an example, the total mass of zinc in one pot (200 tons) is only needed for 3 hours or more according to the flow of a liquid pump of 60 tons/hour, so that time and labor are saved, the labor intensity of workers is reduced, and the injury to the workers caused by high temperature and splashing of zinc liquid is also avoided.

However, the liquid metal is easily condensed due to the high temperature in the metal pot, resulting in more metal slag. When a common centrifugal pump is used for pumping liquid metal, the centrifugal pump usually works for about half an hour, and the phenomenon that an impeller is blocked or a bearing expands to be dead can occur, so that the centrifugal pump cannot work normally.

Disclosure of Invention

The invention discloses a liquid pump for hot dipping operation and a using method thereof, aiming at overcoming the defects of the prior art and providing high hot dipping equipment with long service life, wide application range and high production efficiency.

The invention achieves the purpose by the following technical scheme:

the utility model provides a drawing liquid pump for hot dipping operation, includes pump case and impeller, and the impeller is located in the pump case, characterized by: also comprises a filtering cavity, a supporting frame, a bearing seat, a lifting frame, a motor, a coupling and a transmission shaft,

the bottom of the pump shell is connected with a filtering cavity through a pump shell flange, a filtering hole is formed in the filtering cavity, and the side surface of the pump shell is connected with a transfusion tube;

the bottom mounting of support frame is on the top of pump case, and the bottom mounting of bearing frame is on the top of support frame, is equipped with the end bearing in the bearing frame, plays the gallows to fix on the top of bearing frame, and in the gallows was located to the motor, the output shaft of motor passed through the top of coupling joint transmission shaft, and the end bearing hooped on the upper portion at the transmission shaft, and in the support frame was worn to locate by the transmission shaft, the impeller was connected to the bottom.

The liquid pump for hot-dip operation is characterized in that: the supporting frame is formed by splicing at least two sections of supporting units in sequence through supporting flanges, a supporting bearing is arranged at the joint of two adjacent sections of supporting units, the outer ring of the supporting bearing is hooped in the flange necks of the two supporting flanges, the inner ring of the supporting bearing is hooped on the transmission shaft, two end faces of the supporting bearing are respectively covered by an annular pressing plate, and the two pressing plates are respectively connected with one supporting flange through a bolt-nut assembly.

The liquid pump for hot-dip operation is characterized in that:

the pump shell, the impeller and the filtering cavity are made of 316L stainless steel, and the aperture of the filtering hole in the filtering cavity is not more than 12 mm;

the end bearing and the middle bearing are both ceramic bearings;

the motor is provided with a soft starter.

The use method of the liquid pump for hot dipping operation is characterized in that: the method is implemented in sequence according to the following steps:

liquid extraction: immersing the filtering cavity in a metal pot for containing liquid metal and arranged below the liquid level of the liquid metal, starting a motor, driving a transmission shaft to rotate by the motor through a coupler so as to drive an impeller to rotate, and generating suction force to suck the liquid metal by the rotation of the impeller;

filtering: the liquid metal is filtered by the filtering holes of the filtering cavity, the metal slag mixed in the liquid metal is blocked outside the filtering cavity by the filtering holes, and the filtered liquid metal flows through the filtering cavity and the pump shell in sequence and then is output from the infusion tube.

The pump of traditional structure is when sucking liquid metal that aluminium zinc liquid etc. is used for the hot dip coating, can appear the phenomenon of changeing often, and the leading reason has two points: firstly, a large amount of scum and bottom slag are in the metal pot, and the scum enters the pump shell along with the pumping of the pump, so that the impeller is blocked. According to the invention, the filtering cavity is additionally arranged at the bottom, so that metal slag is prevented from entering the pump shell to block the impeller;

the temperature in the metal pot can reach 600-650 ℃, and under the high-temperature environment, if the bearing made of common carbon steel is adopted, the bearing can be expanded and damaged after long-term use, and the condition can be avoided by adopting the ceramic shaft sleeve. The ceramic shaft sleeve is high in hardness, wear-resistant and self-lubricating, and when the temperature changes, the ceramic bearing has good dimensional stability due to small thermal expansion coefficient, and the ceramic shaft sleeve cannot expand or clamp when being heated and expanded in a high-temperature environment.

The two ends of the supporting bearing are covered and fixed by the pressing plate, so that the supporting bearing is prevented from moving up and down along the shaft.

The pump shell, the impeller and the filtering cavity are made of L stainless steel, and the surfaces of the pump shell, the impeller and the filtering cavity can be coated with a high-temperature-resistant coating; the motor is provided with a soft starter, the motor adopts low rotating speed when being started, and normal rotating speed and rated flow are reused when the motor rotates normally after a period of time.

The invention has the following beneficial effects: the service life of the liquid pump is prolonged, reliable technical guarantee is provided for smoothly pumping high-temperature liquid metal, the application range is wide, and the production efficiency is high.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a front view of a filter chamber according to the present invention;

FIG. 4 is a bottom view of the filter housing of the present invention;

fig. 5 is a partially enlarged view of a portion a in fig. 1.

Detailed Description

The invention is further illustrated by the following specific examples.

Example 1

A liquid pump for hot dip operation comprises a pump shell 1, an impeller 2, a filter cavity 3, a support frame 4, a bearing seat 5, a lifting frame 6, a motor 7, a coupler 8 and a transmission shaft 9, and has the specific structure as shown in figures 1-5:

the impeller 2 is arranged in the pump shell 1, the bottom of the pump shell 1 is connected with the filtering cavity 3 through a pump shell flange 11, and the filtering cavity 3 is shown in figures 3 and 4: a filtering hole 31 is arranged in the filtering cavity 3, and the side surface of the pump shell 1 is connected with the infusion tube 12;

the bottom mounting of support frame 4 is on the top of pump case 1, the bottom mounting of bearing frame 5 is on the top of support frame 4, be equipped with end bearing 51 in the bearing frame 5, play gallows 6 and fix on the top of bearing frame 5, motor 7 is located in gallows 6, the output shaft of motor 7 passes through the top that shaft coupling 8 connects transmission shaft 9, end bearing 51 hoops and establishes on the upper portion of transmission shaft 9, transmission shaft 9 wears to locate in support frame 4, impeller 2 is connected to the bottom of transmission shaft 9.

In this embodiment: the supporting frame 4 is formed by splicing at least two sections of supporting units 41 in sequence through supporting flanges 42, and a supporting bearing 43 is arranged at the joint of two adjacent sections of supporting units 41, as shown in fig. 5: the outer ring of the support bearing 43 is clamped in the flange necks of the two support flanges 42, the inner ring of the support bearing 43 is clamped on the transmission shaft 9, the two end faces of the support bearing 43 are respectively covered by an annular pressure plate 44, and the two pressure plates 44 are respectively connected with one support flange 42 by a bolt-nut assembly.

In this embodiment:

the pump shell 1, the impeller 2 and the filtering cavity 3 are all made of 316L stainless steel, and the aperture of the filtering hole 31 in the filtering cavity 3 is not more than 12 mm;

the end bearing 51 and the intermediate bearing 43 are both ceramic bearings;

a soft starter is arranged on the motor 7.

When the method is used, the steps are implemented in sequence as follows:

liquid extraction: immersing the filtering cavity 3 in a metal pot for containing liquid metal and arranged below the liquid level of the liquid metal, starting the motor 7, driving the transmission shaft 9 to rotate by the motor 7 through the coupling 8 so as to drive the impeller 2 to rotate, and generating suction force to suck the liquid metal by the rotation of the impeller 2;

filtering: the sucked liquid metal is firstly filtered by the filtering holes 31 of the filtering cavity 3, the metal slag mixed in the liquid metal is blocked outside the filtering cavity 3 by the filtering holes 31, and the filtered liquid metal flows through the filtering cavity 3 and the pump shell 1 in sequence and then is output from the infusion tube 12.

The pump of traditional structure is when sucking liquid metal that aluminium zinc liquid etc. is used for the hot dip coating, can appear the phenomenon of changeing often, and the leading reason has two points: firstly, a large amount of scum and bottom slag are in the metal pot, and the scum enters the pump shell along with the pumping of the pump, so that the impeller is blocked. In the embodiment, the filtering cavity 3 is additionally arranged at the bottom, so that the metal slag is prevented from entering the pump shell 1 to block the impeller 2;

the temperature in the metal pot can reach 600-650 ℃, under the high-temperature environment, if the bearing made of common carbon steel is adopted, the bearing can be expanded and damaged after long-term use, and the end bearing 51 and the support bearing 43 can be avoided by adopting ceramic shaft sleeves. The ceramic shaft sleeve is high in hardness, wear-resistant and self-lubricating, and when the temperature changes, the ceramic bearing has good dimensional stability due to small thermal expansion coefficient, and the ceramic shaft sleeve cannot expand or clamp when being heated and expanded in a high-temperature environment.

Both ends of the support bearing 43 are covered and fixed by the pressing plate 44, so that the support bearing 43 is prevented from moving up and down along the shaft.

The pump shell 1, the impeller 2 and the filtering cavity 3 are all made of 316L stainless steel, and high-temperature resistant coatings can be coated on the surfaces of the stainless steel; the motor 7 is provided with a soft starter, adopts low rotating speed when starting, and reuses normal rotating speed and rated flow when rotating normally after a period of time.