CN210152906U

CN210152906U - Centrifugal pump with plastic long-handle impeller

Info

Publication number: CN210152906U
Application number: CN201921089891.7U
Authority: CN
Inventors: 蒋龙福; 蒋凌超; 郭丹枫; 夏鹏飞; 蒋列锋
Original assignee: Yixing Zhous Pump Industry Co Ltd
Current assignee: Yixing Zhous Pump Industry Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-03-17
Anticipated expiration: 2029-07-12

Abstract

The utility model discloses a take centrifugal pump of plastics long handle impeller, including installing pump case, the pump cover on the base, set up the long handle impeller in the pump case, install and be used for on the long handle impeller long handle with the pump cover mounting hole with the sealed outer dress formula mechanical seal of impeller long handle, main shaft one end is cup jointed with the impeller long handle is coaxial, the installing support is worn to locate by the other end, the end is worn out the installing support and is passed through the shaft coupling and be connected with the motor, the long handle of impeller includes the periphery plastic layer and pre-buried in the metal built-in fitting of the long handle of impeller, outer dress formula mechanical seal dress is on the periphery plastic layer of the long handle of. The utility model discloses effectively prevent that the quiet ring department of long handle installation of impeller high temperature from leading to the concave ring of plastic deformation production to prevent not hard up and the liquid that leaks between rotating ring and the impeller handle, extension long handle impeller life.

Description

Centrifugal pump with plastic long-handle impeller

Technical Field

The utility model relates to a field centrifugal pump preparation field especially relates to plastics or lining plastic's anticorrosive centrifugal pump.

Background

The plastic anti-corrosion pump sold in the existing market is a common pump in the environmental protection and chemical industry, the pump has all-plastic type and lining plastic type, and the shaft seal generally adopts mechanical seal.

Referring to fig. 1 and 2, in the conventional technology, in order to prevent the fluid in the pump cavity from corroding pump components such as a pump spindle and the like, a long-handle impeller 1 is often adopted, a metal core of the impeller arranged in the pump cavity is completely wrapped by plastic, so that the fluid in the pump cavity cannot penetrate into the core of the impeller, a mechanical seal 2 is sleeved on a plastic-wrapped layer 1.1 of the long handle of the impeller, and the mechanical seal is cooled by the fluid in the pump cavity.

The anti-corrosion pump has good internal leakage resistance, but the external leakage resistance has structural defects: because the pump of the long-handle impeller structure cannot be provided with the built-in mechanical seal and can only be provided with the built-out mechanical seal, the moving ring of the built-out mechanical seal is sleeved and fastened outside the plastic layer 1.1 of the impeller handle, the heat energy generated by the motion friction of the moving ring and the static ring is accumulated at the positions of the moving ring and the static ring, the temperature of the position of the moving ring and the static ring is higher than that of other positions by 20-30 ℃, the plastic layer of the long-handle impeller is just positioned at the position of the region, and the plastic layer is softened and deformed after being heated, so that the part of the impeller handle is in annular concave, and further the moving ring and the impeller handle are loosened to leak liquid. The liquid in the pump cavity is subjected to the resistance action of the liquid ring generated when the impeller handle rotates, so that the temperature of the mechanical seal part cannot be reduced. The above situation causes the easy leakage of the plastic anti-corrosion pump shaft seal of the long-handle impeller, and affects the service life and the anti-leakage safety performance of the pump, so that further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at effectively preventing the long handle installation of impeller quiet ring department high temperature of leading to the concave ring of plastic deformation production to prevent not hard up and the liquid that leaks between rotating ring and the impeller handle, prolong long handle impeller life's take the centrifugal pump of long handle impeller of plastics.

In order to realize the purpose of the utility model, the technical proposal of the utility model is that: the utility model provides a take centrifugal pump of plastics long handle impeller, is including installing pump case, the pump cover on the base, set up the long handle impeller in the pump case, install and be used for on the long handle impeller long handle with the pump cover mounting hole with the sealed outer dress formula mechanical seal of long handle of impeller, main shaft one end and the coaxial cup joint of long handle of impeller, the installing support of wearing to locate of the other end, the end is worn out the installing support and is passed through the shaft coupling and be connected with the motor, its characterized in that long handle of impeller includes the periphery plastic layer and pre-buried in the metal embedded part in the long handle of impeller, outer dress formula mechanical seal dress is on the periphery plastic layer.

Preferably, the metal embedded part and the long handle of the impeller are coaxially arranged and are in a sleeve shape, one end of the metal embedded part is provided with an anchoring part connected with the impeller, and the other end of the metal embedded part is provided with a connecting hole connected with one end of the main shaft in a matching mode. The wall thickness of periphery plastic layer is thinner, and the urceolus diameter of metal embedded part slightly is less than the diameter of the long handle of impeller to effectual support intensity that provides prevents that the periphery plastic layer warp because of the high temperature, and the wall thickness of periphery plastic layer is about 5~10 mm.

Preferably, the external mechanical seal comprises a static ring and a dynamic ring in contact seal with the static ring, the static ring is fixedly connected to the pump cover through a static ring gland, and the dynamic ring is sleeved on a plastic layer of the long handle of the impeller and rotates along with the rotation of the impeller. Other configurations of the externally mounted mechanical seal are consistent with the prior art, such as springs, and will not be discussed herein.

Preferably, the outer side of the movable ring is provided with a heat-radiating wind wheel which is sleeved on the long handle of the impeller.

Preferably, the stationary ring gland includes a base body and a heat dissipation portion provided on the base body, and the heat dissipation portion is one or a combination of a hole, a projection, and a ring.

Preferably, the wind wheel is a wheel body with radiating fins. When the pump is operated, the wind wheel rotates along with the rotation of the main shaft, so that air flow (wind) is generated, and the air flow cools the moving ring, the static ring and the long handle of the impeller, so that the temperature of the components is reduced.

Most preferably, the wheel body of the wind wheel is split into two symmetrical encircling type base bodies, the hoops are arranged on the same side of each encircling type base body, connecting holes used for connecting and encircling are correspondingly formed in the hoops, and bolts are arranged in the connecting holes for fastening.

For realizing the utility model discloses the purpose provides another kind of technical scheme: the utility model provides a take centrifugal pump of plastics long handle impeller, is including installing pump case, the pump cover on the base, sets up the long handle impeller in the pump case, install on the long handle impeller long handle be used for with the pump cover on the mounting hole with the sealed outer dress formula mechanical seal of the long handle of impeller, motor output main shaft one end cup joints with the impeller long handle is coaxial, its characterized in that impeller long handle includes the periphery plastic layer and pre-buried in the metal embedded part in the long handle of impeller, outer dress formula mechanical seal dress is on the periphery plastic layer of the long handle of impeller.

Preferably, the metal embedded part and the long handle of the impeller are coaxially arranged and are in a sleeve shape, one end of the metal embedded part is provided with an anchoring part connected with the impeller, and the other end of the metal embedded part is provided with a connecting hole connected with one end of the main shaft in a matching mode.

Preferably, the outer side of the movable ring is provided with a heat-radiating wind wheel which is sleeved on the long handle of the impeller. The utility model has the advantages that: the utility model discloses set up the wind wheel on the long handle of long handle impeller, can effectual reduction seal assembly's temperature, the range of reduction is generally between 15~40 ℃, what of cooling, need according to the temperature of carrying liquid and decide, carry liquid under the 50 ℃ temperature generally and can cool down 10~15 ℃, and carry liquid temperature high more, the cooling range at sealing position is just big more, the plastic layer of parcel on the long handle impeller just can not be because of being heated and soft deformation, mechanical seal's rotating ring just can with the long handle of impeller between global driving fit, the fluid leakage at this position has been prevented, the stability of pump shaft seal has been improved.

Drawings

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

Fig. 2 is a schematic structural view of a long-shank impeller.

Fig. 3 is a schematic structural view of embodiment 1.

Fig. 4 is a front view of the stationary cover plate of fig. 1.

Fig. 5 is a left side view of fig. 4.

Fig. 6 is another schematic view of the stationary cover plate of fig. 1.

Figure 7 is an isometric view of the wind rotor of figure 3.

Fig. 8 is a schematic structural view of embodiment 2.

Fig. 9 is another schematic structural view of embodiment 1.

Fig. 10 is a schematic view of a wrap-around base of a wind wheel.

Fig. 11 is a schematic view of a wind wheel wrap-around installation.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Example 1: as shown in fig. 2-7 and 9, a centrifugal pump with a plastic long-handle impeller comprises a pump case 3 and a pump cover 4 which are installed on a base, a long-handle impeller 1 which is arranged in the pump case 3 and an external mechanical seal 2 which is installed on a long handle of the long-handle impeller 1 and used for sealing a mounting hole in the pump cover 4 with the long handle 1 of the impeller, wherein one end of a main shaft 8 is coaxially sleeved with the long handle of the impeller, the other end of the main shaft penetrates through a mounting support 5, the tail end of the main shaft penetrates out of the mounting support 5 and is connected with a motor 10 through a coupler, the long handle of the impeller comprises an external plastic layer 1.1 and a metal embedded part 1.2 which is embedded in the long handle of the impeller, and the external mechanical seal.

The metal embedded part 1.2 is coaxially arranged with the long handle of the impeller and is in a sleeve shape, one end of the metal embedded part is provided with an anchoring part with the impeller, and the other end of the metal embedded part is provided with a connecting hole which is matched and connected with one end of the main shaft 8. The external mechanical seal 2 comprises a static ring 2.2 and a movable ring 2.1 in contact seal with the static ring 2.2, the static ring 2.2 is fixedly connected to the pump cover 4 through a static ring gland 7, and the movable ring 2.1 is sleeved on a plastic layer 1.1 of the long handle of the impeller and rotates along with the rotation of the impeller. The outer side of the moving ring 2.1 is provided with a heat-dissipating wind wheel 6, and the heat-dissipating wind wheel 6 is sleeved on the long handle of the impeller. The wind wheel 6 is a wheel body with radiating fins, and the working principle and the structure are similar to fan blades of a fan.

The stationary ring gland 7 comprises a base body and a heat dissipation part 7.1 arranged on the base body, wherein the heat dissipation part 7.1 is a combination of a hole, a bump and a ring.

In this embodiment, the material is polypropylene, and each part of the centrifugal pump is manufactured by injection molding or hot die casting, and can be installed after machining meets the requirement. When in installation, the pump shell 3, the impeller 1 and the pump cover 4 are assembled together according to the requirements of a conventional centrifugal pump, the pump cover 4 is provided with the static ring 2.2 of the external mechanical seal, the static ring is fixedly pressed by the static ring gland 7, and the long handle of the long-handle impeller 1 is further sleeved with the movable ring 2.1 and the wind wheel 6 of the mechanical seal. Then the above-mentioned components are combined and mounted together with pump body connecting support 5, main shaft 8 and bearing 9, after mounting upper base plate 11 and motor 10, the specific pressure between the shaft seal dynamic ring and static ring (2.1 and 2.2) is regulated to proper extent, and the dynamic ring 2.1 is fixed by fastening screw of dynamic ring 2.1, and then the wind wheel 6 is fixed on the long handle of blade wheel by means of screw. After the pump machine is debugged according to the conventional debugging method, the plastic centrifugal pump with the wind cooling system on the long-handle impeller, the long handle of the impeller being not thermally deformed due to temperature rise and reliable shaft seal can be obtained.

In this embodiment, both the pump housing 3 and the pump cover 4 are provided with metal embedded parts 3.1 and 4.1, so as to increase the mechanical strength.

This embodiment can also be seen in fig. 9: the pump casing is made into a centrifugal pump with a metal pump body 3.1 and a plastic lining 3.2.

The preparation method aims to save the consumption of precious plastics, such as fluoroplastic with high price and good corrosion resistance, and achieve the purpose of saving the preparation cost.

Example 2: as shown in fig. 8, a centrifugal pump with a plastic long-handle impeller comprises a pump case 3 and a pump cover 4 which are mounted on a base, a long-handle impeller 1 arranged in the pump case 3, and an external mechanical seal 2 which is mounted on a long handle of the long-handle impeller 1 and used for sealing a mounting hole on the pump cover 4 with the long handle 1 of the impeller, wherein one end of a main shaft 8 is coaxially sleeved with the long handle of the impeller, the long handle of the impeller comprises a peripheral plastic layer 1.1 and a metal embedded part 1.2 which is embedded in the long handle of the impeller, and the external mechanical seal 2 is sleeved on the peripheral plastic layer 1.1 of the long handle of the impeller. The metal embedded part 1.2 is coaxially arranged with the long handle of the impeller and is in a sleeve shape, one end of the metal embedded part is provided with an anchoring part with the impeller, and the other end of the metal embedded part is provided with a connecting hole which is matched and connected with one end of the main shaft 8. The external mechanical seal 2 comprises a static ring 2.2 and a movable ring 2.1 in contact seal with the static ring 2.2, the static ring 2.2 is fixedly connected to the pump cover 4 through a static ring gland 7, and the movable ring 2.1 is sleeved on a plastic layer 1.1 of the long handle of the impeller and rotates along with the rotation of the impeller. The outer side of the moving ring 2.1 is provided with a heat-dissipating wind wheel 6, and the heat-dissipating wind wheel 6 is sleeved on the long handle of the impeller. The wind wheel 6 is a wheel body with radiating fins, and the working principle and the structure are similar to fan blades of a fan.

Example 3: referring to embodiment 1 or 2, the wheel body of the wind wheel 6 is cut into two symmetrical encircling type base bodies (6.1 and 6.2), the same side of each encircling type base body (6.1 and 6.2) is provided with a hoop 6.3, the hoop 6.3 is correspondingly provided with a connecting hole 6.4 for connecting and clasping, and a screw 12 is arranged in the connecting hole 6.4 for fastening.

In embodiment 1 or 2, the movable ring may be made of a material with good thermal conductivity, such as metal alloy, graphite, plastic alloy, etc.

The wind wheel can be made of metal or plastic.

The wind wheel can be fixed on a long handle of the impeller by screws, and screw holes can be processed on the wind wheel and the impeller handle and fixed by concave-convex screw holes.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. The utility model provides a take centrifugal pump of plastics long handle impeller, is including installing pump case, the pump cover on the base, set up the long handle impeller in the pump case, install and be used for on the long handle impeller long handle with the pump cover mounting hole with the sealed outer dress formula mechanical seal of long handle of impeller, main shaft one end and the coaxial cup joint of long handle of impeller, the installing support of wearing to locate of the other end, the end is worn out the installing support and is passed through the shaft coupling and be connected with the motor, its characterized in that long handle of impeller includes the periphery plastic layer and pre-buried in the metal embedded part in the long handle of impeller, outer dress formula mechanical seal dress is on the periphery plastic layer.

2. The centrifugal pump with the plastic long-handle impeller as claimed in claim 1, wherein the metal embedded part is coaxially arranged with the long handle of the impeller and is sleeve-shaped, one end of the metal embedded part is provided with an anchoring part for the impeller, and the other end of the metal embedded part is provided with a connecting hole for being matched and connected with one end of the main shaft.

3. A centrifugal pump with long-handle plastic impeller as claimed in claim 1, wherein the external mechanical seal includes a stationary ring and a moving ring in contact with the stationary ring for sealing, the stationary ring is fixed to the pump cover via a stationary ring gland, and the moving ring is sleeved on the plastic layer of the long handle of the impeller and rotates with the rotation of the impeller.

4. The centrifugal pump with the plastic long-handle impeller according to claim 1, wherein a heat-dissipating wind wheel is arranged outside the rotating ring and sleeved on the long handle of the impeller.

5. The centrifugal pump with the plastic long-handle impeller as claimed in claim 1, wherein the stationary ring gland comprises a base body, and a heat dissipation part arranged on the base body, wherein the heat dissipation part is one or a combination of a hole, a bump and a ring.

6. The centrifugal pump with the plastic long-handle impeller according to claim 1, wherein the wind wheel is a wheel body with heat radiating fins.

7. The centrifugal pump with the plastic long-handle impeller according to claim 1, wherein the wheel body of the wind wheel is split into two symmetrical encircling type base bodies, the same side of each encircling type base body is provided with a hoop, the hoop is correspondingly provided with connecting holes for connecting and clasping, and the connecting holes are internally provided with bolts for fastening.

8. The utility model provides a take centrifugal pump of plastics long handle impeller, is including installing pump case, the pump cover on the base, sets up the long handle impeller in the pump case, install on the long handle impeller long handle be used for with the pump cover on the mounting hole with the sealed outer dress formula mechanical seal of the long handle of impeller, motor output main shaft one end cup joints with the impeller long handle is coaxial, its characterized in that impeller long handle includes the periphery plastic layer and pre-buried in the metal embedded part in the long handle of impeller, outer dress formula mechanical seal dress is on the periphery plastic layer of the long handle of impeller.

9. The centrifugal pump with the plastic long-handle impeller as claimed in claim 8, wherein the metal embedded part is coaxially arranged with the long handle of the impeller and is sleeve-shaped, one end of the metal embedded part is provided with an anchoring part for the impeller, and the other end of the metal embedded part is provided with a connecting hole for being matched and connected with one end of the main shaft.

10. A centrifugal pump with long-handled plastic impeller as claimed in claim 8, wherein the external mechanical seal includes a stationary ring and a moving ring in contact with the stationary ring for sealing, the stationary ring is fixed to the pump cover through a stationary ring cover, and the moving ring is sleeved on the plastic layer of the long handle of the impeller and rotates with the rotation of the impeller.

11. The centrifugal pump with the plastic long-handle impeller according to claim 8, wherein a heat-dissipating wind wheel is arranged outside the rotating ring and sleeved on the long handle of the impeller.