Cooling water system of shield pump and shield pump comprising cooling water system

Abstract

The utility model relates to a cooling water system of a shield pump and the shield pump comprising the cooling water system. The shield pump comprises a cooling water jacket, a cooling water inlet and a water outlet are formed in the bottom of the cooling water jacket, and the cooling water system comprises a first water inlet pipe, a water inlet hose, a second water inlet pipe, a first water outlet pipe, a water outlet hose and a second water outlet pipe. The first water inlet pipe is sequentially connected with the water inlet hose and the other end of the second water inlet pipe to form a water inlet passage; the first water outlet pipe is sequentially connected with the water outlet hose and the other end of the second water outlet pipe to form a water drainage channel; the first water inlet pipe is lower than the second water inlet pipe, and the first water outlet pipe is lower than the second water outlet pipe. Compared with the prior art, the water inlet hose and the water outlet hose have the hose flexibility, when the shield pump is stopped for drainage, drainage is easy, the risk of frost crack of the cooling jacket is avoided after rapid drainage, and normal operation of the shield pump is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of canned motor pump technology, and more specifically, to a cooling water system for a canned motor pump and a canned motor pump including the cooling water system. Background Technology

[0002] There are two existing methods for cooling the motor surface of canned motor pumps: air cooling and water cooling. Air cooling involves directly dissipating heat from the motor surface into the air, but this is ineffective, especially in high ambient temperatures and when there is no wind. Water cooling involves installing a cooling water jacket on the motor surface, through which water flows to cool the motor surface. This method provides better cooling and can better meet user requirements, but requires an additional cooling water system.

[0003] The cooling water system is connected to the cooling water jacket by rigid pipes. The two rigid pipes with different heights are connected by a right-angle bend. When the canned motor pump is stopped and drainage is carried out, the water is prone to freezing in the low temperature of winter, which makes drainage difficult and the cooling jacket is at risk of freezing and cracking, which is not conducive to the normal operation of the canned motor pump. The removal of the conventional rigid pipe joint flange is cumbersome and time-consuming, which affects work efficiency. Summary of the Invention

[0004] The technical problem this invention aims to solve is that when two rigid pipes with different heights are connected by a right-angle bend, the water is prone to freezing in the low winter temperatures when the canned motor pump is shut down, causing drainage difficulties and posing a risk of the cooling jacket freezing and cracking, which is detrimental to the normal operation of the canned motor pump.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, a cooling water system for a shielded pump is provided. The shielded pump includes a cooling water jacket disposed on the surface of the pump body. A cooling water inlet and a drain outlet are provided at the bottom of the cooling water jacket. The cooling water system includes a first inlet pipe, an inlet hose, a second inlet pipe, a first outlet pipe, an outlet hose, and a second outlet pipe. One end of the second inlet pipe is connected to the cooling water inlet. The first inlet pipe is sequentially connected to the other end of the inlet hose and the second inlet pipe to form an inlet passage.

[0006] One end of the first water outlet pipe is connected to the drain outlet, and the first water outlet pipe is connected in sequence to the other end of the water outlet hose and the second water outlet pipe to form a drainage passage;

[0007] The first inlet pipe is lower than the second inlet pipe, and the first outlet pipe is lower than the second outlet pipe.

[0008] Preferably, both the inlet hose and the outlet hose are metal hoses.

[0009] Preferably, it also includes a quick-connect flange, wherein the end of the water inlet hose that connects to the second water inlet pipe is a quick connector, and the second water inlet pipe and the water inlet hose are connected through the quick-connect flange.

[0010] Preferably, there are two quick-connect flanges, and the end of the water outlet hose that connects to the first water outlet pipe is also a quick connector. The first water outlet pipe and the water outlet hose are also connected through the quick-connect flanges.

[0011] Preferably, it also includes a branch pipe, through which the first inlet pipe and the second outlet pipe are connected to form a circulation loop.

[0012] Preferably, a valve is installed on the branch pipe.

[0013] Preferably, it also includes a heat exchanger, with the other end of the first inlet pipe away from the cooling water jacket connected to the heat exchanger.

[0014] According to another aspect of the present invention, a shielded pump is provided, comprising any of the above-described cooling water systems.

[0015] Preferably, it also includes a base and a pump body, the pump body being mounted on the base.

[0016] Preferably, the pump also includes a stator and a rotor, the pump body includes a drive chamber, the stator is fixedly installed inside the drive chamber, and the rotor is located inside the stator.

[0017] Compared with the prior art, the technical solution provided by the embodiments of this utility model can achieve at least the following beneficial effects:

[0018] First, the inlet hose and outlet hose have the flexibility of hoses. They are set between the cooling water jacket inlet / outlet pipe and the external inlet / outlet pipe, which facilitates the connection and disassembly between the two pipes with different heights. When the canned pump is stopped, drainage is easy and quick, avoiding the risk of the cooling jacket freezing and cracking, and ensuring the normal operation of the canned pump.

[0019] Secondly, flexible hoses have a certain degree of flexibility, and the connection between two pipes with different heights is almost straight, which saves more on the consumption of fittings and pipe materials.

[0020] Third, the system operates smoothly, reducing pump failure rates and maintenance costs.

[0021] Fourth, reduce load reductions caused by pump and motor failures to ensure production output.

[0022] Fifth, it is simple and convenient to operate when draining water.

[0023] Sixth, the inlet and outlet hoses are equipped with quick connectors at one end, which are connected via quick-connect flanges, making disassembly and reassembly simpler and faster, saving time and improving work efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0025] Figure 1 This is a schematic diagram of the cooling water system structure of a canned pump provided in Example 1;

[0026] Figure 2 This is a schematic diagram of the canned pump structure described in Example 1;

[0027] Figure 3 This is a schematic diagram of the cooling water system structure of another canned pump provided in Example 2. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0030] Example 1

[0031] See Figure 2 This embodiment provides a shielded pump 31, including:

[0032] Base 1;

[0033] Pump body 2 is mounted on base 1. Pump body 2 includes impeller chamber 102 and drive chamber 103.

[0034] Stator 3 is fixedly installed inside drive cavity 103;

[0035] The rotor 4 is located inside the stator 3. The rotor 4 is fixed inside the drive cavity 103 through the front bearing housing 12 and the rear bearing housing 13. The rotor 4 and the stator 3 are separated by the isolation sleeve 14. The front end of the rotor 4 extends into the impeller cavity 102 and connects to the impeller 15.

[0036] The pump body 2 is provided with a suction port 21 and a discharge port 22 at the impeller cavity 102. The material enters from the suction port 21 and is discharged from the discharge port 22.

[0037] A cooling water jacket 5 surrounds the outside of the drive chamber 103 corresponding to the pump body 2. The cooling water jacket has an inlet 6 and an outlet 7 at its bottom. The inlet 6 is the cooling water inlet and the outlet 7 is the drain outlet. Cooling water flows into the cooling water jacket 5 through the inlet 6 and cools the surface of the pump body 2.

[0038] refer to Figure 1 The cooling water system of the shielded pump 31 includes a first inlet pipe 32, an inlet hose 33, a second inlet pipe 34, a first outlet pipe 35, an outlet hose 36, and a second outlet pipe 37. One end of the second inlet pipe 21 is connected to the inlet port 6, and the first inlet pipe 32 is connected to the other end of the inlet hose 33 and the second inlet pipe 34 in sequence to form an inlet passage.

[0039] One end of the first water outlet pipe 35 is connected to the outlet 7, and the first water outlet pipe 35 is connected in sequence to the other end of the water outlet hose 36 and the second water outlet pipe 37 to form a drainage passage.

[0040] The first inlet pipe 32 is lower than the second inlet pipe 34, and the first outlet pipe 35 is lower than the second outlet pipe 37. The first inlet pipe 32 is connected to an external water source and is room temperature water. The second outlet pipe 37 is connected to an external drainage pipe. The water flow direction of the cooling water system is as follows: the external water source enters the first inlet pipe 32, then passes through the inlet hose 33 and the second inlet pipe 34 in sequence, and is then guided into the cooling water jacket 5 through the inlet port 6. The water cooling the surface of the pump body 2 of the shielded pump 31 is then discharged through the outlet port 7 to the first outlet pipe 35, and then discharged through the outlet hose 36 and the second outlet pipe 37 in sequence to the external drainage pipe.

[0041] The inlet hose 33 and outlet hose 36 have the flexibility of hoses and are set between the cooling water jacket inlet / outlet pipe and the external inlet / outlet pipe, which facilitates the connection and disassembly between the two pipes with different heights. When the shielded pump 31 is stopped, drainage is easy and quick, avoiding the risk of the cooling jacket freezing and cracking, and ensuring the normal operation of the shielded pump 31.

[0042] Meanwhile, the flexible hose has a certain degree of elasticity, and the connection between two pipes with different heights is almost straight, which further saves on the consumption of fittings and pipe materials. Because the canned pump 31 operates normally, the system runs smoothly, reducing load reduction due to pump failure and ensuring output; it also reduces the pump failure rate and maintenance costs; and drainage is simple and convenient to operate.

[0043] Preferably, both the inlet hose 33 and the outlet hose 36 are metal hoses.

[0044] To facilitate quick disassembly of the metal hose, save time, and improve work efficiency, the cooling water system of the shielded pump 31 also includes a quick-connect flange 38. The end of the water inlet hose 33 that connects to the second water inlet pipe 34 is a quick connector, and the second water inlet pipe 34 and the water inlet hose 34 are connected through the quick-connect flange 38.

[0045] More preferably, there are two quick-connect flanges 38, and the end of the water outlet hose 36 that connects to the first water outlet pipe 35 is also a quick connector. The first water outlet pipe 35 and the water outlet hose 36 are also connected through the quick-connect flanges 38.

[0046] Valvees are preferably installed at the pipe connection points to facilitate timely inspection and maintenance. The pipe size and material are selected according to actual needs.

[0047] Example 2

[0048] This embodiment provides another cooling water system for a shielded pump, the structural diagram of which is shown below. Figure 3 As shown, this is an improvement based on Embodiment 1. To save water resources, the cooling water system of the shielded pump also includes a branch pipe 40. The first inlet pipe 32 and the second outlet pipe 37 are connected through the branch pipe 40 to form a circulation loop, maximizing water reuse. A valve is installed on the branch pipe 40, and when the circulating water temperature is too high, the amount of circulating return water reused can be adjusted through the valve.

[0049] Example 3

[0050] This embodiment provides a third type of cooling water system for a shielded pump. The difference from embodiment 1 is that it includes a heat exchanger. The other end of the first inlet pipe 32, away from the cooling water jacket 5, is connected to the heat exchanger. A heat exchanger is connected before the first inlet pipe 32 to cool the water at room temperature for use in applications requiring lower temperature cooling.

[0051] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A cooling water system for a canned motor pump, the canned motor pump comprising a cooling water jacket disposed on the surface of the pump body, wherein a cooling water inlet and a drain outlet are disposed at the bottom of the cooling water jacket, characterized in that, It includes a first water inlet pipe, a water inlet hose, a second water inlet pipe, a first water outlet pipe, a water outlet hose, and a second water outlet pipe. One end of the second water inlet pipe is connected to the cooling water inlet. The first water inlet pipe is connected to the other end of the water inlet hose and the second water inlet pipe in sequence to form a water inlet passage. One end of the first water outlet pipe is connected to the drain outlet, and the first water outlet pipe is connected in sequence to the other end of the water outlet hose and the second water outlet pipe to form a drainage passage; The first inlet pipe is lower than the second inlet pipe, and the first outlet pipe is lower than the second outlet pipe.

2. The cooling water system according to claim 1, characterized in that, Both the inlet hose and the outlet hose are metal hoses.

3. The cooling water system according to claim 1, characterized in that, It also includes a quick-connect flange, wherein one end of the water inlet hose that connects to the second water inlet pipe is a quick connector, and the second water inlet pipe and the water inlet hose are connected through the quick-connect flange.

4. The cooling water system according to claim 3, characterized in that, There are two quick-connect flanges, and the end of the water outlet hose that connects to the first water outlet pipe is also a quick connector. The first water outlet pipe and the water outlet hose are also connected through the quick-connect flanges.

5. The cooling water system according to claim 1, characterized in that, It also includes branch pipes, through which the first inlet pipe and the second outlet pipe are connected to form a circulation loop.

6. The cooling water system according to claim 5, characterized in that, A valve is installed on the branch pipe.

7. The cooling water system according to claim 1, characterized in that, It also includes a heat exchanger, with the other end of the first inlet pipe away from the cooling water jacket connected to the heat exchanger.

8. A canned pump, characterized in that, Includes the cooling water system as described in any one of claims 1 to 7.

9. The shielded pump according to claim 8, characterized in that, It also includes a base and a pump body, the pump body being mounted on the base.

10. The shielded pump according to claim 9, characterized in that, It also includes a stator and a rotor. The pump body includes a drive chamber, the stator is fixedly installed inside the drive chamber, and the rotor is located inside the stator.

Images