Improved long shaft sleeve for connecting mechanical seal and impeller of chemical pump

Abstract

The utility model discloses a modified long shaft sleeve for connecting a mechanical seal and an impeller of a chemical pump, a first sealing ring mounting groove and a second sealing ring mounting groove are respectively arranged inside two ends of the long shaft sleeve, a mechanical seal shaft sleeve and an impeller shaft sleeve are changed into an integral long shaft sleeve, one end of the long shaft sleeve is used for being connected with the impeller, and the other end of the long shaft sleeve is used for being connected with the impeller. One end of the long shaft sleeve is used for sealing connection, the other end of the long shaft sleeve is used for mechanical sealing connection, the first sealing ring installation groove and the second sealing ring installation groove are used for installing corresponding O-shaped rings, and after the long shaft sleeve is arranged on the shaft in a sleeved mode, the O-shaped rings can seal the two ends of the long shaft sleeve. Due to the fact that disassembly is strenuous after the long shaft sleeve is matched with the shaft, a groove is formed in the end, close to the end connected with the impeller, of the long shaft sleeve, and disassembly of the long shaft sleeve can be conveniently achieved by being matched with a puller subsequently; therefore, the long shaft sleeve is convenient to disassemble on the basis of improving the sealing performance and the corrosion resistance.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical pump seals, and in particular relates to a modified long shaft sleeve used for connecting a mechanical seal and an impeller of a chemical pump. Background Art

[0002] Chemical pumps play an important role in the field of hydrometallurgy and are the most important equipment for solution transportation. Therefore, the stable and long-term use of chemical pumps directly affects economic benefits. At present, the mechanical seal sleeve 7 of the chemical pump is connected to the impeller sleeve 9 by a sealing gasket 8. The temperature of the transported solution in the hydrometallurgy process is high and the corrosiveness is large. In addition, high-speed and high-lift chemical pumps are selected. The sealing gasket is easy to wear or corrode, and the solution enters the sealing component from the shaft end, causing the chemical pump to be paralyzed and unable to be used stably, which seriously affects the economic benefits. Therefore, a modified long sleeve with good sealing, corrosion resistance and easy disassembly is designed to solve the above-mentioned problems. Utility Model Content

[0003] (1) Technical problem to be solved: In view of the defects in the prior art that the mechanical seal sleeve of a chemical pump and the impeller sleeve are connected by a sealing gasket, which is easily worn or corroded, and the solution enters the sealing component from the shaft end, causing the chemical pump to be paralyzed and unable to be used stably, the utility model provides a modified long sleeve for connecting the mechanical seal and the impeller of a chemical pump, which ensures that the long sleeve is easy to disassemble on the basis of improving the sealing performance and corrosion resistance.

[0004] (2) The technical solution adopted by the utility model is as follows:

[0005] A modified long shaft sleeve for connecting the mechanical seal and impeller of a chemical pump, one end of the long shaft sleeve is used to connect with the impeller, and the other end is used to connect with the mechanical seal, a sealing ring installation groove 1 and a sealing ring installation groove 2 are respectively arranged inside the two ends of the long shaft sleeve, and a groove is arranged on the end of the long shaft sleeve close to the end connected with the impeller.

[0006] A further technical solution is that the second sealing ring installation groove close to the connecting end of the long shaft sleeve and the impeller includes two.

[0007] A further technical solution is that the material of the long shaft sleeve is titanium.

[0008] A further technical solution is that a sealing ring installation groove near the long shaft sleeve and the mechanical seal is a φ36×3mm O-ring groove for installing a φ36×2.65mm O-ring, and the O-ring groove is 7mm away from the near end of the shaft sleeve.

[0009] A further technical solution is that the sealing ring installation groove 2 is an O-ring groove 2 of φ42.3×4.5mm, which is used to install an O-ring 2 of φ36×3.5mm. The two O-ring grooves are 9.5mm apart, and the sealing ring installation groove 2 near the connection end of the long sleeve and the impeller is 4.5mm away from the near end of the sleeve.

[0010] A further technical solution is that the groove is a U-shaped groove of φ55×40 mm.

[0011] A further technical solution is that the total length of the long shaft sleeve is 212 mm.

[0012] (3) Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] Seal ring installation groove 1 and seal ring installation groove 2 are respectively arranged inside the two ends of the long shaft sleeve. By changing the mechanical seal sleeve and the impeller sleeve into an integral long shaft sleeve, one end of the long shaft sleeve is used to connect with the impeller, and the other end is used for mechanical seal connection. Seal ring installation groove 1 and seal ring installation groove 2 are used to install corresponding O-rings. After the long shaft sleeve is sleeved on the shaft, the O-ring can seal the two ends of the long shaft sleeve. Since the long shaft sleeve is adopted, there is no need for the sealing gasket originally located between the mechanical seal sleeve and the impeller sleeve, and the sealing and internal corrosion are further improved. Since it is difficult to disassemble the long shaft sleeve after it is matched with the shaft, a groove is arranged on the long shaft sleeve near the end where it is connected to the impeller, so that it is convenient to disassemble the long shaft sleeve in cooperation with a puller, thereby ensuring that the long shaft sleeve is easy to disassemble on the basis of improving the sealing and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a half-section schematic diagram of the long shaft sleeve of the utility model;

[0015] Figure 2 It is a half-section stereoscopic view of the long shaft sleeve of the utility model;

[0016] Figure 3 It is a schematic diagram of the connection method between the mechanical seal sleeve and the impeller sleeve in the prior art;

[0017] Figure 4 It is an exploded view of the connection method between the mechanical seal sleeve and the impeller sleeve in the prior art. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1-Figure 4A modified long shaft sleeve 1 for connecting the mechanical seal of a chemical pump with an impeller, one end of the long shaft sleeve 1 is used for connecting with the impeller, and the other end is used for mechanical seal connection, a sealing ring installation groove 1 2 and a sealing ring installation groove 2 3 are respectively arranged inside the two ends of the long shaft sleeve 1, and a groove 4 is arranged on the end of the long shaft sleeve 1 near the end connected with the impeller.

[0020] When in use, the design of the long shaft sleeve 1 and the O-rings at both ends of the long shaft sleeve 1 greatly ensure the sealing of the chemical pump, and the design of the groove 4 greatly increases the practicality of the long shaft sleeve 1, solves the problem that the long shaft sleeve 1 is not easy to disassemble when the chemical pump runs for a long time, and prevents the solution from entering the sealing component from the shaft end, which greatly improves the stability and service life of the chemical pump. When the chemical pump runs for a long time, the long shaft sleeve 1 and the shaft bite each other, which is difficult to disassemble. A special clamp is installed at the groove 4, and a puller is used to easily disassemble the long shaft sleeve 1, which is convenient for the maintenance of the chemical pump sealing component.

[0021] There are two sealing ring installation grooves 23 near the connection end of the long shaft sleeve 1 and the impeller. The sealing ring installation groove 23 is an O-ring groove 2 of φ42.3×4.5mm, which is used to install the O-ring 26 of φ36×3.5mm. The distance between the two O-ring grooves 2 is 9.5mm, and the sealing ring installation groove 23 near the connection end of the long shaft sleeve 1 and the impeller is 4.5mm away from the near end of the sleeve. There are two φ36×3.5mm O-rings 26, which fully avoids the impeller and the pump shaft of the chemical pump being loosely fastened, or the backflow of liquid in the liquid outlet pipe causing the impeller to flip and cause leakage, and prevents the leaked liquid from entering the gap between the pump shaft and the sleeve, causing damage to the mechanical seal, sleeve, and pump shaft.

[0022] The material of the long shaft sleeve 1 is titanium, which has good corrosion resistance.

[0023] The seal ring installation groove 2 near the long shaft sleeve 1 connected to the mechanical seal is a φ36×3mm O-ring groove 1, which is used to install a φ36×2.65mm O-ring 5. The distance between the O-ring groove 1 and the near end of the shaft sleeve is 7mm. This solves the problem of sealing between the mechanical seal and the external environment, preventing external solutions from entering the mechanical seal and causing damage to the mechanical seal, and ensuring the normal operation of the mechanical seal.

[0024] The groove 4 is a U-shaped groove of φ55×40 mm, which ensures that the long shaft sleeve 1 is easy to disassemble and install when it is disassembled and repaired.

[0025] The total length of the long sleeve 1 is 212 mm. After the mechanical seal sleeve and the impeller sleeve are integrated, the sealing end surface of the connection is reduced, and the material is TA2 to ensure that the mechanical seal and the sleeve are not corroded.

[0026] The above are only preferred embodiments of the present invention.

Claims

1. A modified long sleeve for connecting the mechanical seal and impeller of a chemical pump, characterized in that: One end of the long shaft sleeve (1) is used for connecting with the impeller, and the other end is used for mechanical sealing connection. A sealing ring installation groove 1 (2) and a sealing ring installation groove 2 (3) are respectively arranged inside the two ends of the long shaft sleeve (1). A groove (4) is arranged on the long shaft sleeve (1) near the end thereof connected with the impeller.

2. A modified long sleeve for connecting a mechanical seal and an impeller of a chemical pump according to claim 1, characterized in that: The sealing ring installation groove 2 (3) near the connection end between the long shaft sleeve (1) and the impeller includes two.

3. A modified long sleeve for connecting a mechanical seal and an impeller of a chemical pump according to claim 1, characterized in that: The material of the long shaft sleeve (1) is titanium.

4. A modified long sleeve for connecting a mechanical seal and an impeller of a chemical pump according to claim 1, characterized in that: The sealing ring installation groove 1 (2) near the long shaft sleeve (1) connected with the mechanical seal is a φ36×3mm O-ring groove 1 for installing a φ36×2.65mm O-ring 1. The distance between the O-ring groove 1 and the near end of the shaft sleeve is 7mm.

5. A modified long sleeve for connecting a mechanical seal and an impeller of a chemical pump according to claim 2, characterized in that: The sealing ring installation groove 2 (3) is an O-ring groove 2 of φ42.3×4.5 mm, which is used to install an O-ring 2 of φ36×3.5 mm. The distance between the two O-ring grooves is 9.5 mm. The sealing ring installation groove 2 (3) close to the connection end of the long shaft sleeve (1) and the impeller is 4.5 mm away from the near end of the shaft sleeve.

6. A modified long sleeve for connecting a mechanical seal and an impeller of a chemical pump according to claim 1, characterized in that: The groove (4) is a U-shaped groove of φ55×40 mm.

7. A modified long sleeve for connecting a mechanical seal and an impeller of a chemical pump according to any one of claims 1 to 6, characterized in that: The total length of the long shaft sleeve (1) is 212 mm.

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