A type of antifreeze centrifugal pump
By designing a drain outlet structure with sealing bolts and sealing rings in the centrifugal pump and implementing insulation measures with thermal insulation cotton, the problem of freezing and cracking of the centrifugal pump at low temperatures has been solved, enabling convenient liquid discharge and equipment protection, and improving service life and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIASHAN JIANGNAN MACHINERY & ELECTRICAL INSTR LTD
- Filing Date
- 2025-09-04
- Publication Date
- 2026-06-30
AI Technical Summary
In cold winters or low-temperature environments, after a centrifugal pump stops working, the residual medium inside the pump body is prone to freezing and expansion, which can cause components to freeze and crack, affecting service life and increasing maintenance costs and downtime. Existing manual drainage methods are cumbersome and incomplete, and pose a risk of freezing and cracking.
An antifreeze centrifugal pump was designed. By setting a drain port structure with sealing bolts and sealing rings in the pump body, combined with heat insulation cotton, residual liquid is ensured to be discharged, and heat insulation cotton is added to the outside of the shaft to prevent freezing and cracking.
It enables simple and effective drainage of residual liquid inside the pump, preventing freezing and cracking, improving the service life and reliability of the centrifugal pump, and reducing maintenance costs.
Smart Images
Figure CN224432821U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of centrifugal pump technology, and in particular to an antifreeze centrifugal pump. Background Technology
[0002] Centrifugal pumps operate by using the rotation of an impeller to cause water to move at a centrifugal speed. They are widely used in industries such as power, metallurgy, coal, and building materials. In cold winters or low-temperature environments, when a centrifugal pump stops working, a certain amount of medium remains inside the pump body. This residual medium is prone to freezing at low temperatures. Because water expands when it freezes, it may cause the pump body, impeller, and other components to crack, affecting the service life of the centrifugal pump, increasing equipment maintenance costs and downtime, and causing inconvenience to production. To prevent centrifugal pumps from freezing and cracking, the usual method is to manually empty the residual medium inside the pump body after it stops working. However, this method is cumbersome, time-consuming, and labor-intensive, and it is difficult to completely empty the residual medium inside the pump body, still posing a risk of freezing and cracking. Therefore, we propose an antifreeze centrifugal pump. Utility Model Content
[0003] To address the aforementioned problems, this invention provides an antifreeze centrifugal pump. This invention solves the problem that residual media easily freezes at low temperatures. Since water expands when it freezes, it can cause cracks in components such as the pump body and impeller, affecting the pump's lifespan, increasing maintenance costs and downtime, and causing inconvenience to production. To prevent freezing and cracking, the common method is to manually empty the residual media from the pump after it stops working. However, this method is cumbersome, time-consuming, and labor-intensive, and it is difficult to completely empty the residual media from the pump, still posing a risk of freezing and cracking.
[0004] This utility model discloses an antifreeze centrifugal pump, comprising a base, a motor fixedly mounted on one side of the upper part of the base, the output end of the motor being fixedly connected to a coupling, the coupling being fixedly connected to a shaft on the side away from the motor, a protective sleeve being provided on the outer side of the shaft, the protective sleeve being fixedly connected to a housing on the side away from the motor, the shaft being fixedly connected to an impeller on the side away from the motor, an inlet pipe being provided on the side of the housing away from the protective sleeve, an outlet pipe being provided in the upper middle part of the housing, a drain port being provided in the lower middle part of the housing, a sealing bolt being provided in the drain port, a sealing block being provided above the sealing bolt, and an internal thread matching the sealing bolt being provided on the inner wall of the drain port.
[0005] In the above scheme, the sealing bolt is located below the housing and is fitted with a sealing ring.
[0006] In the above scheme, the end of the sealing bolt head is provided with an internal hexagonal countersunk groove.
[0007] In the above scheme, the protective sleeve is fixedly connected to the base via a first support frame.
[0008] In the above scheme, the lower part of the shell is fixedly connected to the base by a second support frame.
[0009] In the above scheme, a protective cover is provided on the outside of the coupling, and the lower part of the protective cover is fixedly connected to the base.
[0010] In the above solution, the outer side of the protective cover is provided with heat insulation cotton.
[0011] In the above solution, mounting blocks are provided at both ends of the base, and mounting holes are provided on the mounting blocks.
[0012] The advantages and beneficial effects of this utility model are as follows: This utility model provides an antifreeze centrifugal pump. The motor drives the coupling to rotate, and through the transmission of the coupling, the shaft also rotates. When the shaft drives the impeller to rotate, liquid can enter the housing through the inlet pipe and be discharged through the outlet pipe. The liquid remaining inside the housing can be discharged through the drain port. When the sealing bolt is located inside the drain port, the sealing block can seal the drain port, and the sealing ring can seal the contact surface between the sealing bolt and the housing. Insulation cotton is wrapped around the outside of the protective sleeve, which can insulate the shaft. This centrifugal pump has a simple structure, good insulation effect, and facilitates the discharge of liquid remaining inside the pump body, avoiding damage to the centrifugal pump caused by low temperature and improving the service life of the centrifugal pump. Attached Figure Description
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a cross-sectional view of the present invention;
[0016] Figure 3 This is a schematic diagram of part A of the present invention.
[0017] In the diagram: 1. Base; 2. Motor; 3. Coupling; 4. Shaft; 5. Protective sleeve; 6. Housing; 7. Impeller; 8. Inlet pipe; 9. Outlet pipe; 10. Drain port; 11. Sealing bolt; 12. Sealing block; 13. Internal thread; 14. Sealing ring; 15. Hexagonal recess; 16. First support frame; 17. Second support frame; 18. Protective cover; 19. Insulation cotton; 20. Mounting block; 21. Mounting hole. Detailed Implementation
[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.
[0019] like Figure 1-3 As shown, this utility model is an antifreeze centrifugal pump, including a base 1. A motor 2 is fixedly installed on one side of the upper part of the base 1. The output end of the motor 2 is fixedly connected to a coupling 3. The side of the coupling 3 away from the motor 2 is fixedly connected to a shaft 4. A protective sleeve 5 is provided on the outer side of the shaft 4. The shaft 4 and the protective sleeve 5 are movably connected by a bearing. The end of the protective sleeve 5 away from the motor 2 is fixedly connected to a housing 6. The end of the shaft 4 away from the motor 2 is fixedly connected to an impeller 7. An inlet pipe 8 is provided on the side of the housing 6 away from the protective sleeve 5. An outlet pipe 9 is provided in the middle of the upper part of the housing 6. When the motor 2 is working, the motor 2 drives the coupling 3 to rotate. Through the transmission of the coupling 3, the shaft 4 also rotates accordingly. When the shaft 4 rotates, driving the impeller 7 to rotate, liquid can enter the housing 6 through the inlet pipe 8 and be discharged through the outlet pipe 9. A drain port 10 is provided in the middle of the lower end of the housing 6. A sealing bolt 11 is provided in the drain port 10. A sealing block 12 is provided above the sealing bolt 11. An internal thread 13 matching the sealing bolt 11 is provided on the inner wall of the drain port 10. Liquid remaining inside the housing 6 can be discharged through the drain port 10. The sealing bolt 11 and the housing 6 are threadedly connected by the internal thread 13 on the housing 6. The upper end of the sealing block 12 is provided with a downward inclined surface. When the sealing bolt 11 is located inside the drain port 10, the sealing block 12 can seal the drain port 10.
[0020] The sealing bolt 11 is located below the housing 6 and is fitted with a sealing ring 14, which can seal the contact surface between the sealing bolt 11 and the housing 6.
[0021] The sealing bolt 11 has an internal hexagonal countersunk groove 15 at the screw head end, which makes it easier for workers to rotate the sealing bolt 11 using tools.
[0022] The protective sleeve 5 is fixedly connected to the base 1 via the first support frame 16.
[0023] The housing 6 is fixedly connected to the base 1 via a second support frame 17 at its lower part.
[0024] The coupling 3 is provided with a protective cover 18 on its outer side. The lower part of the protective cover 18 is fixedly connected to the base 1. The protective cover 18 can protect the coupling 3.
[0025] The protective sleeve 5 is provided with thermal insulation cotton 19 on the outside. The thermal insulation cotton 19 wraps around the outside of the protective sleeve 5 and can keep the shaft 4 warm.
[0026] The base 1 is provided with mounting blocks 20 on both sides, and mounting holes 21 are provided on the mounting blocks 20. The base 1 can be fixedly installed through the mounting holes 21 on the mounting blocks 20.
[0027] Specifically, in this utility model, when the motor 2 is working, the motor 2 drives the coupling 3 to rotate. Through the transmission of the coupling 3, the shaft 4 also rotates. When the shaft 4 drives the impeller 7 to rotate, the liquid can enter the housing 6 through the inlet pipe 8 and be discharged through the outlet pipe 9. The liquid remaining inside the housing 6 can be discharged through the drain port 10. The sealing bolt 11 is threadedly connected to the housing 6 through the internal thread 13 on the housing 6. The upper end of the sealing block 12 is provided with a downward inclined surface. When the sealing bolt 11 is located inside the drain port 10, the sealing block 12 can seal the drain port 10. The sealing ring 14 can seal the contact surface between the sealing bolt 11 and the housing 6. The heat insulation cotton 19 is wrapped around the outside of the protective sleeve 5, and the heat insulation cotton 19 can keep the shaft 4 warm.
[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A frost-protected centrifugal pump comprising a base (1), characterized in that, A motor (2) is fixedly installed on one side above the base (1). The output end of the motor (2) is fixedly connected to the coupling (3). The side of the coupling (3) away from the motor (2) is fixedly connected to the shaft (4). A protective sleeve (5) is provided on the outside of the shaft (4). The end of the protective sleeve (5) away from the motor (2) is fixedly connected to the housing (6). The end of the shaft (4) away from the motor (2) is fixedly connected to the impeller (7). An inlet pipe (8) is provided on the side of the housing (6) away from the protective sleeve (5). An outlet pipe (9) is provided in the middle of the upper part of the housing (6). A drain port (10) is opened in the middle of the lower end of the housing (6). A sealing bolt (11) is provided in the drain port (10). A sealing block (12) is provided above the sealing bolt (11). An internal thread (13) matching the sealing bolt (11) is opened on the inner wall of the drain port (10).
2. A freeze-proof centrifugal pump according to claim 1, characterized in that The sealing bolt (11) is located below the housing (6) and is fitted with a sealing ring (14).
3. The freeze-proof centrifugal pump according to claim 1, wherein The sealing bolt (11) has an internal hexagonal countersunk groove (15) at the screw head end.
4. The freeze-proof centrifugal pump according to claim 1, wherein The protective sleeve (5) is fixedly connected to the base (1) via the first support frame (16) below.
5. The freeze-proof centrifugal pump according to claim 1, wherein The housing (6) is fixedly connected to the base (1) via a second support frame (17) below.
6. The freeze-proof centrifugal pump according to claim 1, wherein The coupling (3) is provided with a protective cover (18) on the outside, and the lower part of the protective cover (18) is fixedly connected to the base (1).
7. The freeze-proof centrifugal pump according to claim 1, wherein The protective sleeve (5) is provided with thermal insulation cotton (19) on the outside.
8. The freeze-proof centrifugal pump according to claim 1, wherein The base (1) has mounting blocks (20) on both sides, and mounting holes (21) are provided on the mounting blocks (20).