Submersible sewage pump sealing ring structure easy to mount and dismount

Abstract

The utility model relates to a submersible sewage pump sealing ring structure easy to assemble and disassemble, which comprises a sealing ring, the sealing ring is positioned between a pump body and an impeller, the sealing ring is in clearance fit with the pump body, the sealing ring is in clearance fit with the impeller, and a sealing groove and an external thread are arranged on the outer diameter of the sealing ring. An arc-shaped transition section for guiding liquid to uniformly flow to the inlet of the impeller is arranged on the inner diameter of the sealing ring; and a pump body internal thread matched with the external thread of the sealing ring is arranged on the pump body. The submersible sewage pump has the advantages of cost saving, convenience in maintenance and the like, the sealing ring can be easily mounted and dismounted, the sealing performance is reliable, the maintenance efficiency is improved, and the stable operation of the submersible sewage pump is ensured.

Description

Technical Field

[0001] The utility model relates to a sealing ring structure for a submersible sewage pump, in particular to a sealing ring structure for a submersible sewage pump which can be easily installed and disassembled, has reliable sealing performance, improves maintenance efficiency, and ensures stable operation of the submersible sewage pump. Background Art

[0002] Submersible sewage pumps are suitable for conveying sewage containing impurities such as sand, mud, fiber, etc., and are widely used in sewage treatment plants, water diversion projects, integrated pumping stations, petrochemicals and other fields.

[0003] Figure 1 The schematic diagram of the original submersible sewage pump sealing ring structure is as follows: Figure 1 As shown: There is a sealing ring between the pump body and the impeller of the existing submersible sewage pump for dynamic and static sealing: a certain gap is left between the sealing ring and the impeller in the radial direction for dynamic sealing; the sealing ring and the pump body are interference fit, and the sealing ring is pressed into the pump body by the tooling for static sealing to block the leakage of liquid from the joint surface between the pump body and the sealing ring. Due to the interference fit, the deformation of the sealing ring caused by the extrusion of the pump body during the installation process will affect the radial gap size between the impeller and the impeller. If the deformation is serious, it will also cause the parts to jam, thereby affecting the performance of the submersible sewage pump. In addition, when disassembling and replacing the sealing ring, the sealing ring can only be pushed out of the pump body through the nail hole on the pump body, which is time-consuming and labor-intensive, and it is easy to cause the inner hole of the pump body to be strained, affecting the sealing effect of the new sealing ring.

[0004] Therefore, in order to facilitate the installation and disassembly of the sealing ring and ensure the stable operation of the submersible sewage pump, it is necessary to optimize the sealing ring structure of the submersible sewage pump. Utility Model Content

[0005] In view of the above problems, the main purpose of the utility model is to provide a submersible sewage pump sealing ring structure that is easy to install and disassemble, which can easily install and disassemble the sealing ring, has reliable sealing performance, improves maintenance efficiency, and ensures the stable operation of the submersible sewage pump.

[0006] The utility model solves the above technical problems through the following technical solutions: a sealing ring structure of a submersible sewage pump that is easy to install and disassemble, the sealing ring structure of the submersible sewage pump that is easy to install and disassemble comprises: a sealing ring, the sealing ring is located between a pump body and an impeller, the sealing ring and the pump body are clearance-matched, the sealing ring and the impeller are clearance-matched, a sealing groove and an external thread are arranged on the outer diameter of the sealing ring, an arc-shaped transition section for guiding liquid to flow evenly to the impeller inlet is arranged on the inner diameter of the sealing ring, and a pump body internal thread used in conjunction with the external thread of the sealing ring is arranged on the pump body.

[0007] In a specific implementation example of the present utility model, the sealing ring and the pump body are connected by threaded connection.

[0008] In a specific implementation example of the utility model, a plurality of threaded holes for installing and removing the sealing ring are arranged on the end surface of the sealing ring away from the impeller, and the threaded holes are evenly distributed along the circumferential direction.

[0009] In a specific implementation example of the present utility model, the number of threaded holes ranges from 3 to 8.

[0010] In a specific implementation example of the utility model, the inner thread of the pump body is a wedge thread.

[0011] In a specific implementation example of the utility model, the inner thread of the pump body is a 30° wedge thread.

[0012] In a specific implementation example of the utility model, an "O"-shaped sealing ring is installed in a sealing groove arranged on the outer diameter of the sealing ring.

[0013] The positive progress effect of the utility model is that the submersible sewage pump sealing ring structure device which is easy to install and disassemble provided by the utility model has the following advantages:

[0014] The utility model realizes self-locking of the thread and ensures the reliability of the thread connection.

[0015] The sealing ring and the pump body of the utility model are matched with each other in the radial direction with a clearance, and an O-ring seal is arranged on the outer diameter of the sealing ring to block the leakage of liquid from the radial matching surface of the pump body and the sealing ring.

[0016] The sealing ring of the utility model is provided with an arc-shaped transition section to guide the liquid to flow evenly to the impeller inlet, thereby improving the performance of the submersible sewage pump.

[0017] The utility model has the advantages of cost saving, convenient maintenance, etc. The utility model can easily install and disassemble the sealing ring, has reliable sealing performance, improves maintenance efficiency, and ensures the stable operation of the submersible sewage pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the original submersible sewage pump sealing ring structure.

[0019] Figure 2 The utility model is a schematic diagram of the sealing ring structure of the submersible sewage pump.

[0020] Figure 3 for Figure 2 A partial enlarged view of .

[0021] Figure 4 It is a schematic diagram of the threaded connection between the sealing ring and the pump body in the utility model.

[0022] Figure 5 It is a schematic diagram of the sealing ring of the utility model.

[0023] The following are the names corresponding to the label numbers in this utility model:

[0024] Pump body 1, impeller 2, pump shaft 3, pump cover 4, sealing ring 5, pump body internal thread 101, "O"-shaped sealing ring 6, sealing groove 501, external thread 502, arc-shaped transition section 503, threaded hole 504. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0026] Figure 2 This is a schematic diagram of the sealing ring structure of the submersible sewage pump proposed by the utility model. Figure 3 for Figure 2 A partial enlarged view of Figure 2 and 3 As shown: the utility model provides a sealing ring structure of a submersible sewage pump that is easy to install and disassemble, and the sealing ring structure of the submersible sewage pump that is easy to install and disassemble includes: a sealing ring 5, which is located between a pump body 1 and an impeller 2, and the sealing ring 5 and the pump body 1 are clearance-matched, and the sealing ring 5 and the impeller 2 are clearance-matched, a sealing groove 501 and an external thread 502 are provided on the outer diameter of the sealing ring 5, and an arc-shaped transition section 503 for guiding the liquid to flow evenly to the inlet of the impeller 2 is provided on the inner diameter of the sealing ring 5, a pump body inner thread 101 used in conjunction with the external thread 502 of the sealing ring 5 is provided on the pump body 1, and the sealing ring 5 and the pump body 1 are connected by a threaded connection.

[0027] Figure 5 Schematic diagram of the sealing ring of the utility model, such as Figure 5 The end surface of the sealing ring 5 away from the impeller 2 is provided with a plurality of threaded holes 504 for installing and removing the sealing ring 5 , the threaded holes 504 are evenly distributed along the circumferential direction, and the number of the threaded holes 504 ranges from 3 to 8, and is generally 4 to 6.

[0028] The inner thread of the pump body 1 is a wedge thread. In the specific implementation process, the inner thread 101 of the pump body in the utility model is a wedge thread with a wedge thread of 30°. Figure 4 .

[0029] An O-shaped sealing ring 6 is installed in the sealing groove 501 arranged on the outer diameter of the sealing ring.

[0030] The sealing ring and pump body are connected by threads. The outer diameter of the sealing ring is provided with ordinary metric threads, and the inner hole of the pump body is provided with 30° wedge threads to achieve thread self-locking and ensure the reliability of the thread connection.

[0031] The following is a specific implementation example: Figure 2-4As shown: the sealing ring and the pump body are connected by threads. The outer diameter of the sealing ring is provided with ordinary metric threads, and the pump body is provided with 30° wedge threads to achieve thread self-locking and ensure the reliability of the thread connection.

[0032] like Figure 2-4 As shown: the sealing ring and the pump body are radially matched with clearance, and an O-ring seal is arranged on the sealing ring to prevent liquid from leaking from the radial matching surface of the pump body and the sealing ring.

[0033] like Figure 5 As shown: The right end face of the sealing ring is provided with threaded holes for installation and removal. The threaded holes are evenly distributed along the circumference, with a number of 3 to 8. The figure shows 4, and the size can be adjusted according to actual needs. When the sealing ring needs to be replaced, bolts of corresponding sizes are screwed into the threaded holes. Two of the bolts that are in the same straight line as the axis are used as fulcrums, and the sealing ring can be disassembled and assembled with the help of tooling, saving costs and improving maintenance efficiency.

[0034] like Figure 4 As shown: An arc-shaped transition section is provided on the sealing ring to guide the liquid to flow evenly to the impeller inlet, thereby improving the performance of the submersible sewage pump.

[0035] Through the above design, the utility model has the advantages of cost saving, convenient maintenance, etc. The utility model can easily install and disassemble the sealing ring, has reliable sealing performance, improves maintenance efficiency, and ensures the stable operation of the submersible sewage pump.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sealing ring structure of a submersible sewage pump that is easy to install and disassemble, characterized in that: The sealing ring structure of the submersible sewage pump which is easy to install and disassemble comprises: a sealing ring, wherein the sealing ring is located between the pump body and the impeller, the sealing ring and the pump body are clearance matched, the sealing ring and the impeller are clearance matched, a sealing groove and an external thread are arranged on the outer diameter of the sealing ring, an arc-shaped transition section for guiding the liquid to flow evenly to the impeller inlet is arranged on the inner diameter of the sealing ring, and a pump body inner thread which cooperates with the external thread of the sealing ring is arranged on the pump body.

2. The easily installed and disassembled submersible sewage pump sealing ring structure according to claim 1 is characterized in that: The sealing ring and the pump body are connected by threaded connection.

3. The easily installed and disassembled submersible sewage pump sealing ring structure according to claim 1 is characterized in that: The end surface of the sealing ring away from the impeller is provided with a plurality of threaded holes for installing and removing the sealing ring, and the threaded holes are evenly distributed along the circumferential direction.

4. The easily installed and disassembled submersible sewage pump sealing ring structure according to claim 3 is characterized in that: The number of threaded holes ranges from 3 to 8.

5. The easily installed and disassembled submersible sewage pump sealing ring structure according to claim 1 is characterized in that: The inner thread of the pump body is a wedge thread.

6. The easily installed and disassembled submersible sewage pump sealing ring structure according to claim 1 is characterized in that: The inner thread of the pump body is a 30° wedge thread.

7. The easily installed and disassembled submersible sewage pump sealing ring structure according to claim 1 is characterized in that: An "O"-shaped sealing ring is installed in the sealing groove arranged on the outer diameter of the sealing ring.

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