Water-saving seal for water pump for conveying large particles and crystalline medium

Abstract

The utility model discloses a kind of water-saving type pump seals for conveying large particle and crystallization medium water pump, including main shaft, pump cover and cooling cover, the cooling cover is fixed on pump cover, the main shaft is installed in pump cover and cooling cover, pump cavity is formed between main shaft and pump cover, the cooling cover is installed with cooling water inlet pipe, but not set cooling water outlet pipe, cold water that cooling water inlet pipe enters is transferred from cooling cover to pump cavity in pump cover, with the flow of large particle and crystallization medium conveyed in pump cavity. The technical scheme of the device only sets up cooling water inlet pipe, and does not need to set cooling water outlet pipe, cooling water that cooling water inlet pipe enters not only plays the heat generated by cooling bulk type seal and the heat generated by wear-resistant filler and shaft sleeve, but also lubricates wear-resistant filler and shaft sleeve, and cooling water also does not need to be discharged to sewage pool again, two birds with one stone, structure is clever and reasonable.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical seal structure for pumps, specifically a water-saving pump seal for pumps used to transport large particles and crystalline media. Background Technology

[0002] In existing pump mechanical seals, when conveying media with large particles or easily crystallizing media, a mechanical seal structure with cooling water is selected. Regardless of the type of mechanical seal in the existing technology, an external cooling water supply is required, with one inlet and one outlet. This external cooling water carries away the heat generated by the frictional side effects of the seal and simultaneously lubricates the end faces of the moving and stationary rings. The specific structure is as follows... Figure 1 As shown, there are many structural arrangements for introducing and discharging cooling water in the prior art. For example, in the prior art, the "Handheld Pump and its Water Outlet Structure and Water Inlet Mechanism" disclosed in Publication (Announcement) No.: CN220667839U; the "Double Inlet and Double Outlet Water Supply Pump" disclosed in Publication (Announcement) No.: CN216241258U; and the "Industrial Pump Head with Good Sealing Performance" disclosed in Publication (Announcement) No.: CN109029858A, all of which are designed with inlet pipes and outlet pipes.

[0003] The existing technical structure requires the used cooling water to be either returned or discharged into a wastewater tank. Furthermore, the current sealing method demands a continuous supply of a fixed amount of cooling water, leading to high cooling water consumption by the pump. Given modern environmental and energy-saving practices, the used cooling water is considered wastewater and cannot be directly discharged; it must be piped to a wastewater tank for further treatment. This design increases costs and imposes higher environmental requirements. Additionally, the existing pump seal design is inadequate. Even when cooling water is directly injected into the pump body, the design for this injection is often flawed, especially since the water is pressurized upon entry. This can easily cause internal structural problems, leading to excessive pressure that damages the internal structure, shortens service life, and compromises the seal. Therefore, the existing structural design is insufficient.

[0004] Therefore, in order to solve the above problems, it is necessary to develop a water-saving pump seal that has a reasonable structure, saves water resources, and does not require cooling water treatment for pumps that transport large particles and crystalline media. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a water-saving pump seal for pumps used in conveying large particles and crystalline media; the technical solution is as follows:

[0006] A water-saving pump seal for conveying large particles and crystalline media includes a main shaft, a pump cover, and a cooling shroud. The cooling shroud is fixed on the pump cover, and the main shaft is installed inside the pump cover and the cooling shroud, forming a pump chamber between the main shaft and the pump cover. A cooling water inlet pipe is installed on the cooling shroud, but no cooling water outlet pipe is provided. The cold water entering through the cooling water inlet pipe is transferred from the cooling shroud to the pump chamber in the pump cover and flows away with the large particles and crystalline media conveyed in the pump chamber.

[0007] Furthermore, a round nut for positioning and fixing is installed on the right end of the spindle, and a transmission sleeve is installed on the left side of the round nut, which is fitted onto the spindle.

[0008] Furthermore, a bushing fitted on the main shaft is provided on the left side of the transmission sleeve, and a cartridge mechanical seal is installed on the outside of the bushing; the cooling cover is fitted on the bushing and the cartridge mechanical seal respectively, and a sealing cavity is provided inside the cooling cover, which is connected to the cooling water inlet pipe.

[0009] Furthermore, the left end of the cooling cover is installed on the pump cover by fasteners, and a wear-resistant ring is provided inside the pump cover. The wear-resistant ring is fitted onto the bushing and fixed on the pump cover. The bushing is fixed on the main shaft and rotates with the main shaft. There is a gap between the wear-resistant ring and the bushing. The sealing cavity is located on the right side of the wear-resistant ring. After the sealing cavity is filled with cooling water, the cooling water enters the left side area of ​​the wear-resistant ring through the gap.

[0010] The technical solution of this device mainly uses the cooperation of wear-resistant rings and bushings to separate the pump chamber and the sealing chamber. The left side is the pump chamber and the right side is the sealing chamber. Then, the heat exchange of cold water is achieved through the cooperation of wear-resistant rings and bushings. The structure is reasonable.

[0011] Furthermore, wear-resistant filler is also provided inside the wear-resistant ring; in order to effectively increase the service life of the wear-resistant ring and the bushing, wear-resistant filler is provided inside the wear-resistant ring accordingly.

[0012] Furthermore, a back vane is also installed on the main shaft. The back vane is located inside the pump chamber and to the left of the bushing and wear ring. After the back vane rotates with the main shaft, a negative pressure is generated in the right area, which causes the cooling water in the sealed cavity to enter the pump chamber. The setting of the back vane on the main shaft in this device is quite important because it is necessary to generate negative pressure through this mechanism to facilitate the operation of introducing cooling water into the pump chamber. The structure is reasonable.

[0013] Furthermore, the inner wall of the pump cover is also provided with an inner wall layer, and a flow gap is provided between the inner wall layer and the back blade. The left side of the flow gap is connected to the pump cavity, and the right side is connected to the wear ring.

[0014] Beneficial effects: This utility model has the following beneficial effects:

[0015] 1) The technical solution of this device only has a cooling water inlet pipe and does not need to be set up with a cooling water outlet pipe. The cooling water entering through the cooling water inlet pipe not only cools the heat generated by the cartridge seal and the heat generated by the wear-resistant packing and bushing, but also lubricates the wear-resistant packing and bushing. In addition, the cooling water does not need to be discharged into the sewage tank, which achieves two goals at once. The structure is ingenious and reasonable.

[0016] 2) The device has a reasonable arrangement of the positional relationship between the bushing, wear-resistant packing, cartridge mechanical seal and sealing cavity. The sealing cavity in the cooling cover is connected to the cooling water inlet pipe, so that the incoming cooling water can cool the interior and can enter the pump cavity from the gap between the bushing and the wear ring. The structure is reasonable.

[0017] 3) The device also has a back blade on the main shaft. The back blade can generate negative pressure in the right area. The negative pressure and the clearance between the bushing and the wear ring allow the cold water in the sealing cavity to enter the sealing cavity more smoothly. The structure is reasonable. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present utility model;

[0019] Figure 2 This is a partial enlarged view of the present invention;

[0020] Figure 3 Diagram of existing technology structure;

[0021] Among them, the main shaft is 1, the pump cover is 2, the cooling cover is 3, the pump chamber is 4, the cooling water inlet pipe is 5, the round nut is 6, the transmission sleeve is 7, the shaft sleeve is 8, the cartridge mechanical seal is 9, the sealing cavity is 10, the fastener is 11, the wear ring is 12, the wear packing is 13, the back blade is 14, the inner wall layer is 15, and the flow gap is 16. Detailed Implementation

[0022] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0023] like Figure 1 and Figure 2 As shown, a water-saving pump seal for a water pump used to transport large particles and crystalline media includes a main shaft 1, a pump cover 2, and a cooling cover 3. The cooling cover 3 is fixed on the pump cover 2. The main shaft 1 is installed inside the pump cover 2 and the cooling cover 3, forming a pump chamber 4 between the main shaft 1 and the pump cover 2. A cooling water inlet pipe 5 is installed on the cooling cover 3, but no cooling water outlet pipe is provided. The cold water entering through the cooling water inlet pipe 5 is transferred from the cooling cover 3 to the pump chamber 4 in the pump cover 2 and flows away with the large particles and crystalline media transported in the pump chamber 4.

[0024] A round nut 6 for positioning and fixing is installed on the right end of the spindle 1, and a transmission sleeve 7 is installed on the left side of the round nut 6, which is fitted onto the spindle 1.

[0025] A bushing 8 is provided on the left side of the transmission sleeve 7 and is fitted onto the main shaft 1. A cartridge mechanical seal 9 is installed on the outside of the bushing 8. The cooling cover 3 is fitted onto the bushing 8 and the cartridge mechanical seal 9 respectively, and a sealing cavity 10 is provided inside the cooling cover 3. The sealing cavity 10 is connected to the cooling water inlet pipe 5.

[0026] The left side of the cooling cover 3 is mounted on the pump cover 2 by fasteners 11. A wear-resistant ring 12 is provided inside the pump cover 2. The wear-resistant ring 12 is fitted onto the bushing 8. The wear-resistant ring 12 is fixed on the pump cover 2, while the bushing 8 is fixed on the main shaft 1 and rotates with the main shaft 1. There is a gap between the wear-resistant ring 12 and the bushing 8. The sealing cavity 10 is located on the right side of the wear-resistant ring 12. After the sealing cavity 10 is filled with cooling water, the cooling water enters the left side area of ​​the wear-resistant ring 12 through the gap.

[0027] Wear-resistant packing 13 is also provided inside the wear-resistant ring 12; a back blade 14 is also installed on the main shaft 1. The back blade 14 is located in the pump chamber 4 and is located on the left side of the bushing 8 and the wear-resistant ring 12. After the back blade 14 rotates with the main shaft 1, a negative pressure is generated in the right area, which causes the cooling water in the sealing chamber 10 to enter the pump chamber 4.

[0028] The inner wall of the pump cover 2 is also provided with an inner wall layer 15. A flow gap 16 is provided between the inner wall layer 15 and the back blade 14. The left side of the flow gap 16 is connected to the pump chamber 4, and the right side is connected to the wear ring 12.

[0029] like Figure 1As shown, the main structure of this device includes a back blade 14, a wear-resistant ring 12, a cooling cover 3, a cooling water inlet pipe, a cartridge mechanical seal 9, wear-resistant packing 13, a bushing 8, a drive shaft, and a round nut 6. The sealing structure of this device only requires a cooling water inlet pipe 5; a return outlet pipe is not needed. During operation, the back blade 14 on the main shaft 1 is crucial. As the back blade 14 rotates with the main shaft 1, it generates a corresponding negative pressure on the right-side positive area. At this time, cooling water is injected into the sealing cavity 10 of the cooling cover 3 through the cooling water inlet pipe 5. The wear-resistant ring 12 correspondingly separates the pump cavity 4 from the sealing cavity 10. Wear-resistant packing 13 is installed on the wear-resistant ring 12 and works with the bushing 8 to prevent the medium from entering the sealing cavity 10. However, there is a corresponding rotational gap between the sealing cavity 10 and the main shaft 1. When the cooling water enters the sealing cavity 10, since there is only a cooling water inlet pipe 5 and no outlet pipe, the cooling water is under pressure after entering the sealing cavity 10. Under the pressure of the cooling water inlet pipe 5 itself and the negative pressure generated by the back blade 14 on the left, a small amount of cooling water is forced into the pump cavity 4 through the gap between the wear-resistant packing 13 and the bushing 8, and then pumped out of the pump body together with the conveyed medium. With this design, the cooling water not only cools the heat generated by the cartridge seal and the heat generated by the wear-resistant packing 13 and the bushing 8, but also lubricates the wear-resistant packing 13 and the bushing 8. Moreover, the cooling water does not need to be discharged into the sewage tank. It achieves two goals at once, and the structural design is very ingenious.

[0030] Furthermore, during the specific installation of this device, first screw the round nut 6 onto the main shaft 1, install the transmission sleeve 7 and the cartridge mechanical seal 9 onto the cooling cover 3, press the wear-resistant ring 12 into the pump chamber 4 and the sealing connection, then press the cooling cover 3 assembly onto the pump cover 2 and connect it, then put the pump cover 2 and the cooling cover 3 assembly onto the main shaft 1, then press the shaft sleeve 8 into the wear-resistant ring 12, lock the impeller, and finally lock the round nut 6. The structure is reasonable.

[0031] The above-described specific embodiments are merely preferred embodiments of this utility model and are not intended to limit the implementation of this utility model or the scope of the claims. All equivalent changes and modifications made in accordance with the scope of protection of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A water-saving pump seal for pumps used to convey large particles and crystalline media, characterized in that: The device includes a main shaft (1), a pump cover (2), and a cooling cover (3). The cooling cover (3) is fixed on the pump cover (2). The main shaft (1) is installed inside the pump cover (2) and the cooling cover (3). A pump chamber (4) is formed between the main shaft (1) and the pump cover (2). A cooling water inlet pipe (5) is installed on the cooling cover (3), but no cooling water outlet pipe is provided. The cold water entering through the cooling water inlet pipe (5) is transferred from the cooling cover (3) to the pump chamber (4) in the pump cover (2) and flows away with the large particles and crystallizing media transported in the pump chamber (4).

2. The water-saving pump seal for conveying large particles and crystalline media according to claim 1, characterized in that: A round nut (6) for positioning and fixing is installed on the right end of the main shaft (1), and a transmission sleeve (7) is installed on the left side of the round nut (6), which is fitted onto the main shaft (1).

3. A water-saving pump seal for conveying large particles and crystalline media according to claim 2, characterized in that: The transmission sleeve (7) has a bushing (8) fitted on the main shaft (1) on its left side, and a cartridge mechanical seal (9) is installed on the outside of the bushing (8); the cooling cover (3) is fitted on the bushing (8) and the cartridge mechanical seal (9), and a sealing cavity (10) is provided inside the cooling cover (3), which is connected to the cooling water inlet pipe (5).

4. A water-saving pump seal for conveying large particles and crystalline media according to claim 3, characterized in that: The left end of the cooling cover (3) is installed on the pump cover (2) by fasteners (11), and a wear-resistant ring (12) is provided inside the pump cover (2). The wear-resistant ring (12) is fitted onto the bushing (8). The wear-resistant ring (12) is fixed on the pump cover (2), while the bushing (8) is fixed on the main shaft (1) and rotates with the main shaft (1). There is a gap between the wear-resistant ring (12) and the bushing (8). The sealing cavity (10) is located on the right side of the wear-resistant ring (12). After the sealing cavity (10) is filled with cooling water, the cooling water enters the left side area of ​​the wear-resistant ring (12) through the gap.

5. A water-saving pump seal for a pump used to convey large particles and crystalline media according to claim 4, characterized in that: The wear-resistant ring (12) is also provided with wear-resistant filler (13).

6. A water-saving pump seal for conveying large particles and crystalline media according to claim 4, characterized in that: The main shaft (1) is also equipped with a back blade (14), which is located in the pump chamber (4) and on the left side of the bushing (8) and the wear ring (12). After the back blade (14) rotates with the main shaft (1), a negative pressure is generated in the right side area, which causes the cooling water in the sealing cavity (10) to enter the pump chamber (4).

7. A water-saving pump seal for a pump used to convey large particles and crystalline media according to claim 6, characterized in that: The inner wall of the pump cover (2) is also provided with an inner wall layer (15), and a flow gap (16) is provided between the inner wall layer (15) and the back blade (14). The flow gap (16) is connected to the pump chamber (4) on the left and connected to the wear ring (12) on the right.

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