阅读说明：本技术 一种化工高温泵耐腐蚀泵 (Chemical high-temperature pump corrosion-resistant pump ) 是由 彭赞阳 王川 彭灏 卢展雄 彭旦阳 赵长江 于 2020-08-18 设计创作，主要内容包括：本发明涉及一种化工高温泵耐腐蚀泵,包括泵体以及设置于泵体内的叶轮,泵体上设有贯通的泵体进口、泵体出口,叶轮位于泵体进口、泵体出口之间的泵体内；泵体上设有泵盖、机封压盖,泵体内设有泵轴,叶轮通过叶轮螺母和泵盖轴向定位；叶轮螺母螺纹旋紧连接在泵轴上；泵盖、机封压盖上均设置有贯穿冷却孔；侧板紧贴在泵体内侧上,侧板通过螺栓固定于泵体内；侧板内表面涂覆涂布有硅橡胶基体材料；叶轮表面均涂覆涂布有硅橡胶基体材料。通过本发明,长期磨损下,只需更换侧板,无需更换泵体。泵的叶轮螺母外轮廓斜面与轴线呈30°角,为了减少进水流态水力冲撞损失以及涡流。而且侧板内表面和叶轮表面涂覆耐腐蚀涂层,减少了后期的维护费用。(The invention relates to a chemical high-temperature pump corrosion-resistant pump, which comprises a pump body and an impeller arranged in the pump body, wherein the pump body is provided with a pump body inlet and a pump body outlet which are communicated, and the impeller is positioned in the pump body between the pump body inlet and the pump body outlet; the pump body is provided with a pump cover and a mechanical seal gland, a pump shaft is arranged in the pump body, and the impeller is axially positioned with the pump cover through an impeller nut; the impeller nut is screwed and connected on the pump shaft; the pump cover and the machine seal pressing cover are both provided with through cooling holes; the side plate is tightly attached to the inner side of the pump body and is fixed in the pump body through a bolt; the inner surface of the side plate is coated with a silicon rubber base material; the surfaces of the impellers are coated with silicon rubber base materials. By the invention, only the side plate needs to be replaced and the pump body does not need to be replaced under long-term abrasion. The outer contour inclined plane of the impeller nut of the pump forms an angle of 30 degrees with the axis, and the hydraulic impact loss and the vortex in the water inlet flow state are reduced. And the corrosion-resistant coating is coated on the inner surface of the side plate and the surface of the impeller, so that the later maintenance cost is reduced.)

1. A chemical high-temperature pump corrosion-resistant pump comprises a pump body (7) and an impeller (1) arranged in the pump body (7), wherein the pump body (7) is provided with a pump body inlet and a pump body outlet which are communicated, and the impeller (1) is positioned in the pump body (7) between the pump body inlet and the pump body outlet; the pump body (7) is provided with a pump cover (3) and a mechanical seal gland (4), a pump shaft (8) is arranged in the pump body (7), the impeller (1) is axially positioned with the pump cover (3) through an impeller nut (2), and power is transmitted by the pump shaft (8); the impeller nut (2) is screwed and connected to the pump shaft (8) in a threaded manner, and the impeller (1) is screwed and fixed on the pump shaft (8) through the impeller nut (2); the pump cover (3) is connected with the mechanical seal gland (4) through a bolt;

the method is characterized in that: the pump cover (3) and the mechanical seal gland (4) are both provided with through cooling holes, the two cooling holes are communicated to form a circulating cooling system, and cooling liquid enters from one cooling hole and exits from the other cooling hole; the pump is also provided with a side plate (5), the side plate (5) is tightly attached to the inner side of the pump body (7), and the side plate (5) is fixed in the pump body (7) through a bolt (6);

the inner surface of the side plate (5) is coated with a silicon rubber base material to form a side plate silicon rubber base material coating; the surface of the impeller (1) is coated with a silicon rubber base material to form an impeller silicon rubber base material coating; the silicon rubber base material is graphene with the mass ratio of 3% -5%.

2. The chemical high-temperature pump corrosion-resistant pump of claim 1, which is characterized in that: when the inner surface of the side plate (5) is coated with the silicon rubber base material, the side plate (5) is dried after the silicon rubber base material is coated, and is sintered and molded at the temperature of 200-300 ℃.

3. The chemical high-temperature pump corrosion-resistant pump of claim 1, which is characterized in that: the outer contour inclined plane of the impeller nut (2) forms an angle of 30 degrees with the axis of the impeller nut (2).

4. The chemical high-temperature pump corrosion-resistant pump of claim 1, which is characterized in that: the silicon rubber base material is coated on the impeller (1), and the coating process is thermal spraying.

5. The chemical high-temperature pump corrosion-resistant pump of claim 1, which is characterized in that: the thickness of the coating of the silicon rubber base material of the side plate on the inner surface of the side plate (5) is 1-5 mm, and the thickness of the coating of the silicon rubber base material of the impeller on the surface of the impeller (1) is 0.5-2 mm.

6. The chemical high-temperature pump corrosion-resistant pump of claim 1, which is characterized in that: be equipped with the curb plate screw hole on curb plate (5), be equipped with pump body screw hole in pump body (7), bolt (6) are revolved in curb plate screw hole, pump body screw hole in proper order and are screwed and be fixed in pump body screw hole for curb plate (5) are fixed in pump body (7) through bolt (6).

7. The chemical high-temperature pump corrosion-resistant pump of claim 6, which is characterized in that: the number of the side plate threaded holes in the side plate (5) is a plurality, and the side plate threaded holes are uniformly distributed in the side plate (5); the number of the pump body threaded holes in the pump body (7) is a plurality, the pump body threaded holes are uniformly distributed on the side plate (5), the number of the pump body threaded holes is the same as that of the side plate threaded holes, and the pump body threaded holes correspond to the side plate threaded holes one by one; the number of the bolts (6) is a plurality of, and the bolts (6) are respectively screwed in the corresponding side plate threaded holes and the corresponding pump body threaded holes in sequence and are screwed and fixed in the corresponding pump body threaded holes, so that the side plates (5) are fixed in the pump body (7) through the uniformly distributed bolts (6).

Technical Field

The invention relates to a chemical high-temperature pump corrosion-resistant pump, and belongs to the technical field of chemical pumps.

Background

With the rapid development of economic construction in China, the petroleum and chemical industries are also developed vigorously. As an important power equipment for providing energy in the petroleum and chemical industry, i.e., a chemical pump, China already realizes the localization.

The invention relates to a chemical pump, which is characterized in that a chemical pump is required to work under high-temperature, low-temperature, high-pressure, inflammable, explosive, toxic and strong-corrosion media in chemical or petrochemical production, and has higher performance requirements, and the chemical pump can work under the conditions of high inlet pressure, high viscosity, small flow and high cavitation erosion, so that the performance requirements of the chemical pump are higher.

The existing chemical process alkali liquor circulating pump comprises: the pump body, impeller, bearing frame, pump shaft, suspension bracket, the inboard of the pump body install wear-resisting welt through elastic element and anti-rotation locating pin, bearing frame one end be fixed with the bearing gland through bolted connection, the other end is fixed with the bearing box through locking screw, the bearing box on still be provided with adjusting screw, adjusting screw's tail end and bearing box tip extrusion laminating. The device structure is complicated, and if blockking up inconvenient clearance, the part that overflows do not do high corrosion-resistant high abrasion resistance and handle, later maintenance cost are higher.

The back of CNP pump is equipped with bearing box, and the bearing box is equipped with adjusting bolt and locking bolt, the interior of bearing box is embedded with high-temperature bearing, and the high-temperature bearing and pump shaft adopt interference fit method, so that the gap between impeller and pump cover can be effectively regulated, and the pump can produce negative pressure when running, so that the service life of mechanical seal can be effectively prolonged. The device structure is simple, convenient operation, if the pump body wearing and tearing corrode seriously, it is big to change the pump body cost, and the part that overflows does not do high corrosion-resistant high abrasion and corrosion-resistant processing moreover.

Disclosure of Invention

The invention aims to provide a corrosion-resistant pump of a chemical high-temperature pump aiming at the phenomena of long-term working abrasion, corrosion and serious gasification of a pump body and lower corrosion resistance of an impeller, wherein a replaceable side guard plate is adopted at a suction inlet of the pump body, and only a side plate needs to be replaced under the long-term abrasion without replacing the pump body; the side plates and the impellers can be coated simultaneously, and the service lives of the side plates and the impellers are prolonged.

The invention aims to realize the corrosion-resistant pump of the chemical high-temperature pump, which comprises a pump body and an impeller arranged in the pump body, wherein the pump body is provided with a pump body inlet and a pump body outlet which are communicated, and the impeller is positioned in the pump body between the pump body inlet and the pump body outlet; the pump body is provided with a pump cover and a mechanical seal gland, a pump shaft is arranged in the pump body, the impeller is axially positioned through an impeller nut and the pump cover, and power is transmitted by the pump shaft; the impeller nut is screwed and connected to the pump shaft, and the impeller is screwed and fixed on the pump shaft through the impeller nut; the pump cover is connected with the mechanical seal gland through a bolt;

the method is characterized in that: the pump cover and the machine seal pressure cover are both provided with through cooling holes, the two cooling holes are communicated to form a circulating cooling system, and cooling liquid enters from one cooling hole and exits from the other cooling hole;

the side plate is tightly attached to the inner side of the pump body and is fixed in the pump body through bolts;

the inner surface of the side plate is coated with a silicon rubber base material to form a side plate silicon rubber base material coating; the surface of the impeller is coated with a silicon rubber base material to form an impeller silicon rubber base material coating; the silicon rubber base material is graphene with the mass ratio of 3% -5%.

When the inner surface of the side plate is coated with the silicon rubber base material, the side plate is dried after being coated with the silicon rubber base material, and is sintered and molded at the temperature of 200-300 ℃.

The outer contour inclined plane of the impeller nut forms an angle of 30 degrees with the axis of the impeller nut.

The silicon rubber base material is coated on the impeller by a thermal spraying process.

The thickness of the silicon rubber base material coating of the side plate on the inner surface of the side plate is 1-5 mm, and the thickness of the silicon rubber base material coating of the impeller on the surface of the impeller is 0.5-2 mm.

Be equipped with the curb plate screw hole on the curb plate, be equipped with pump body screw hole in the pump body, the bolt is revolved in curb plate screw hole, pump body screw hole in proper order and is screwed and be fixed in pump body screw hole for the curb plate passes through the bolt fastening in the pump body.

The number of the side plate threaded holes in the side plate is a plurality, and the plurality of side plate threaded holes are uniformly distributed in the side plate; the number of the pump body threaded holes in the pump body is a plurality, the pump body threaded holes are uniformly distributed on the side plate, the number of the pump body threaded holes is the same as that of the side plate threaded holes, and the pump body threaded holes correspond to the side plate threaded holes one by one; the quantity of bolt is a plurality of, and a plurality of bolt is revolved in proper order respectively in the curb plate screw hole that corresponds, the pump body screw hole that corresponds and is screwed and be fixed in the pump body screw hole that corresponds for the curb plate is fixed in the pump body through the equipartition bolt.

The chemical high-temperature pump corrosion-resistant pump mainly comprises an impeller, an impeller nut, a pump cover, a mechanical seal gland and a side plate, wherein the pump cover and the mechanical seal gland are provided with cooling holes for cooling mechanical seal through cooling liquid. The curb plate of pump is under long-term wearing and tearing and corruption, and the curb plate of removable pump increases the life of pump, reduces the later maintenance cost. The outer contour inclined plane of the impeller nut of the pump forms an angle of 30 degrees with the axis, and the hydraulic impact loss in the water inlet flow state and the vortex are reduced. And surface pretreatment is carried out before coating of the impeller and the side plate. The technical steps comprise: degreasing by using a cleaning agent, rinsing by using clear water and drying. The coating on the surface of the side plate is made of a silicon rubber base material (RTV-2), the base material contains 3-5% of graphene by mass, the coating process is a spraying method, and the thickness of the inner surface coating is 1-5 mm. After coating, drying, sintering and forming at the temperature of 200-300 ℃, wherein the surface has strong wear resistance and corrosion resistance after sintering, and the service life of the side plate is prolonged.

The invention is further set that the coating on the surface of the impeller is made of silicon rubber base material (RTV-2), the base material contains 3-5% of graphene by mass ratio, the coating process is thermal spraying, and the thickness of the coating is 0.5-2 mm. The base material has certain elasticity and relatively large thermal expansion coefficient, and cannot be broken or fall off under the conditions of temperature, external force or vibration. And the used matrix material contains graphene, the graphene has good chemical stability and extremely strong acid and alkali corrosion resistance, and the binding force is firmer and more uniform by using a thermal spraying process.

The invention further improves the operation efficiency and the stability of the pump by improving the related structure and the surface treatment method of the pump, thereby greatly prolonging the service life of the pump and reducing the overhaul period. The chemical high-temperature pump is suitable for transporting high-temperature and corrosive fluids, so that the application range of the chemical high-temperature pump is very wide.

Compared with the prior art, the invention has the beneficial effects that:

1. the pump cover and the mechanical seal gland are provided with cooling holes, and the side plates used by the pump body can be replaced periodically by cooling liquid cooling mechanical seals, so that the later maintenance cost is reduced.

2. The inner surface of the side plate and the surface coating of the impeller contain graphene, the graphene has good chemical stability and strong acid and alkali corrosion resistance, the impeller adopts a thermal spraying process, the binding force is firmer, the spraying is more uniform, and a good drag reduction effect is achieved.

3. The outer contour inclined plane of the impeller nut of the pump forms an angle of 30 degrees with the axis, so that hydraulic collision loss, vortex and gasification can be reduced, and the service efficiency of the pump is improved.

In summary, the invention provides a chemical high-temperature pump corrosion-resistant pump, which comprises an impeller, an impeller nut, a pump cover, a mechanical seal gland and a side plate, wherein the pump cover and the mechanical seal gland are provided with cooling holes for cooling mechanical seal through cooling liquid. And under long-term wear, only the side plate needs to be replaced, and the pump body does not need to be replaced. The outer contour inclined plane of the impeller nut of the pump forms an angle of 30 degrees with the axis, and the hydraulic impact loss and the vortex in the water inlet flow state are reduced. And the inner surface of the side plate and the surface of the impeller are coated with the corrosion-resistant coating, and the coating material contains 3-5% of graphene by mass ratio, so that the service lives of the side plate and the impeller are prolonged, and the later maintenance cost is reduced.

Drawings

Fig. 1 is a partial structural schematic diagram of the present invention.

Fig. 2 is a partial schematic view of the impeller nut of the present invention.

In the figure: impeller 1, impeller nut 2, pump cover 3, machine seal gland 4, 5 curb plates, 6 bolts, 7 pump bodies, 8 pump shafts.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and detailed description, but the scope of the present invention is not limited thereto.

A chemical high-temperature pump corrosion-resistant pump comprises a pump body 7 and an impeller 1 arranged in the pump body 7, wherein the pump body 7 is provided with a pump body inlet and a pump body outlet which are communicated, and the impeller 1 is arranged in the pump body 7 between the pump body inlet and the pump body outlet; the pump body 7 is provided with a pump cover 3 and a mechanical seal gland 4, the pump body 7 is internally provided with a pump shaft 8, the impeller 1 is axially positioned through the impeller nut 2 and the pump cover 3, and power is transmitted by the pump shaft 8; the impeller nut 2 is screwed and connected to the pump shaft 8 through threads, and the impeller 1 is screwed and fixed on the pump shaft 8 through the impeller nut 2; the pump cover 3 is connected with the mechanical seal gland 4 through a bolt; through cooling holes are formed in the pump cover 3 and the mechanical seal pressing cover 4, the two cooling holes are communicated to form a circulating cooling system, cooling liquid enters from one cooling hole, and cooling liquid exits from the other cooling hole; the pump is also provided with a side plate 5, the side plate 5 is tightly attached to the inner side of the pump body 7, and the side plate 5 is fixed in the pump body 7 through a bolt 6; coating a silicon rubber base material on the inner surface of the side plate 5 to form a side plate silicon rubber base material coating; the surface of the impeller 1 is coated with a silicon rubber base material to form an impeller silicon rubber base material coating; the silicon rubber base material is graphene with the mass ratio of 3% -5%.

When the inner surface of the side plate 5 is coated with the silicon rubber base material, the side plate 5 is dried after being coated with the silicon rubber base material, and is sintered and molded at the temperature of 200-300 ℃. The outer contour inclined plane of the impeller nut 2 forms an angle of 30 degrees with the axis of the impeller nut 2. Coating a silicon rubber matrix material on the impeller 1 by using a thermal spraying process; the thickness of the coating of the silicon rubber base material of the side plate on the inner surface of the side plate 5 is 1-5 mm, and the thickness of the coating of the silicon rubber base material of the impeller on the surface of the impeller 1 is 0.5-2 mm. Set up the curb plate screw hole on curb plate 5, set up pump body screw hole in the pump body 7, bolt 6 revolves in curb plate screw hole, pump body screw hole in proper order and screws and be fixed in pump body screw hole for curb plate 5 is fixed in pump body 7 through bolt 6. The number of the side plate threaded holes in the side plate 5 is a plurality, and the plurality of side plate threaded holes are uniformly distributed in the side plate 5; the number of the pump body threaded holes in the pump body 7 is a plurality, the pump body threaded holes are uniformly distributed on the side plate 5, the number of the pump body threaded holes is the same as that of the side plate threaded holes, and the pump body threaded holes correspond to the side plate threaded holes one by one; the number of the bolts 6 is a plurality of, and the bolts 6 are respectively screwed in the corresponding side plate threaded holes and the corresponding pump body threaded holes in sequence and screwed in the corresponding pump body threaded holes, so that the side plates 5 are fixed in the pump body 7 through the uniformly distributed bolts 6.

As shown in fig. 1, the impeller 1 is positioned inside the pump body 7, and is axially positioned through the impeller nut 2 and the pump cover 3, the key is circumferentially positioned and fixed on the pump shaft 8, the left side of the key is adjacent to the side plate 5, the size of the key is controlled to be 1-2mm, and the pump shaft 8 rotates to drive the impeller 1 to rotate to transmit power; the impeller nut 2 is connected to the pump shaft by means of internal thread action, fluid enters the pump through the outer surface of the impeller nut 2, and the outer contour inclined plane of the impeller nut forms an angle of 30 degrees with the axis, so that energy loss is effectively reduced; the pump cover 3 and the mechanical seal gland 4 are provided with through cooling holes, one cooling hole enters the pump cover 3, the other cooling hole exits the pump cover, the mechanical seal can be effectively cooled, a seal ring is placed between the pump cover 3 and the pump body, the seal ring is connected through bolts, the seal effect is effectively achieved, and leakage of fluid is reduced. The pump cover 3 is connected with the mechanical seal gland 4 through a bolt, and the pump body is supported by a bracket; the side plate 5 of the pump is tightly attached to the inner side of the pump body and fixed by evenly distributed bolts 6.

The impeller 1 and the side plate 5 are subjected to surface pretreatment before coating. The technical steps comprise: degreasing by using a cleaning agent, rinsing by using clear water and drying. The coating on the surface of the side plate 5 is made of a silicon rubber base material (RTV-2), the base material contains 3-5% of graphene by mass, the coating process is a spraying method, and the thickness of the inner surface coating is 1-5 mm. After coating, drying, and sintering and molding at 200-300 ℃. The coating on the surface of the impeller 1 is made of a silicon rubber base material (RTV-2), the base material contains 3-5% of graphene by mass, the coating process is thermal spraying, and the thickness of the coating is 0.5-2 mm.

As shown in fig. 2, the outer contour bevel of the impeller nut 2 of the pump forms an angle of 30 degrees with the axis.

The working principle of the invention is as follows:

when fluid enters the suction inlet of the pump body, only the side plate 5 needs to be replaced under long-term abrasion, and the pump body does not need to be replaced. And the side plate 5 is provided with the corrosion-resistant coating, and the surface of the impeller 1 is also subjected to thermal spraying treatment, so that the service lives of the side plate 5 and the impeller 1 are prolonged. Cooling liquid is injected by arranging cooling holes on the pump cover 3 and the mechanical seal gland 4 of the pump, so that the purpose of cooling the mechanical seal is achieved. In order to reduce the hydraulic collision loss of the water inlet flow state and reduce the vortex, the outer contour inclined plane of the impeller nut 2 of the pump forms an angle of 30 degrees with the axis.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.