Coupling and sealing structure of submersible sewage pump

Abstract

The utility model belongs to the technical field of submersible sewage pumps, and particularly relates to a submersible sewage pump coupling sealing structure which comprises a coupling device and a submersible sewage pump. A matching flange is mounted between the coupling device and the submersible sewage pump; the matching flange is connected with the submersible sewage pump through a flange; grooves are formed in the two sides of the top of the matching flange. A sealing rubber pad is mounted in the groove; four groups of bosses are fixedly connected to the surface of the matching flange; the bosses are arranged on the matching flange in a circumferential array mode, during working, the four sets of bosses are arranged on the planes where the matching flange and the coupling device are close to each other, the bosses can make contact with the matching face ends of the matching flange, the contact area is reduced, and gaps caused by fine particles are reduced; the two sides of the matching flange are respectively provided with a groove, the sealing rubber mat is installed in the grooves, the sealing rubber mat is arranged in an I shape, meanwhile, the other end of the sealing rubber mat is matched with the outlet position of the submersible sewage pump, and the sealing effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible sewage pumps, and specifically relates to a coupling sealing structure of a submersible sewage pump. Background Technique

[0002] A submersible sewage pump is a pump product with an integrated motor and pump that operates underwater. It has the advantages of a compact structure, convenient installation and maintenance, etc. It is widely used in the fields of conveying various domestic sewage, industrial wastewater, building drainage, etc., and plays a very important role in industries such as municipal engineering, industry, and construction.

[0003] There are two types of installations for submersible sewage pumps: elbow type and coupling type. The elbow type is applied to low-power and mobile places, and the coupling type is installed in fixed places. The coupling structure installs a mating flange at the pump outlet and slides down along two vertical guide rods installed on the coupling base. Through the cooperation of the inclined planes on the guide frame and the coupling base, the pump outlet is aligned with the coupling inlet to ensure the normal operation of the pump.

[0004] Normally, the seal between the mating flange and the coupling device uses an O-ring or a sealing strip, which is installed in the groove of the sealing plane of the mating flange and protrudes above the sealing plane. It plays a sealing role through the compression deformation of the self-weight of the pump. Since the coupling base is fixedly installed at the bottom of the water tank and is completely submerged underwater during normal operation and cannot be directly observed, when the pump and the mating flange assembly slide down along the guide rod and contact the mating surface of the coupling device, the O-ring or the sealing strip is extremely easy to fall off, resulting in a gap between the outlet of the pump and the mating flange assembly and the sealing surface of the coupling inlet. The particles between the sealing surfaces of the pump will also cause a gap in the sealing surface, leading to leakage, causing the pump to deviate from the operating point, resulting in a reduction in operating reliability and operating efficiency, and even not meeting the use requirements, affecting the normal operation of the pump system.

[0005] Therefore, the utility model provides a coupling sealing structure of a submersible sewage pump. Content of the Utility Model

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background technique.

[0007] The technical solution adopted by the present utility model to solve its technical problems is as follows: A submersible sewage pump coupling sealing structure described in the present utility model includes a coupling device and a submersible sewage pump; a mating flange is installed between the coupling device and the submersible sewage pump; the mating flange and the submersible sewage pump are connected by a flange; grooves are provided on both sides of the top of the mating flange; a sealing gasket is installed inside the grooves; four groups of convex platforms are fixedly connected to the surface of the mating flange; the convex platforms are arranged in a circumferential array on the mating flange; the convex platforms are arranged on the side wall of the mating flange close to the coupling device. Through the above structure, four groups of convex platforms are provided on the plane where the mating flange and the coupling device approach each other, which can make the end surfaces of the convex platforms and the mating flange in contact, reduce the contact area, and reduce the gaps caused by fine particles.

[0008] Preferably, a guide rod is installed in the middle of the coupling device; a guiding frame is installed in the middle of the guide rod. Through the above structure, the ports of the coupling device and the submersible sewage pump are more easily aligned, and the installation of the coupling device and the submersible sewage pump is more convenient.

[0009] Preferably, a pair of sealing water lines are provided on the surface of the sealing gasket; the sealing water lines are arranged as semi-circular protrusions. Through the above structure, it preferably solves the problem that when the submersible sewage pump and the mating flange slide down along the guide rod and contact the mating surface of the mating flange, the sealing gasket falls off, resulting in gaps in the sealing between the mating outlet position of the submersible sewage pump and the mating flange and the inlet port of the coupling device.

[0010] Preferably, the height of a pair of the sealing water lines is set between 1 - 1.5 mm; the interval between a pair of the sealing water lines is set between 10 - 15 mm.

[0011] Preferably, the compression amount of the sealing gasket is set between 21% - 28%; the height of the convex platform is set between 1.5 - 2.5 mm.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. For a submersible sewage pump coupling sealing structure described in the present utility model, by using a sealing gasket to replace the original O-ring or sealing strip, and cooperating with the positioning convex platform, the end surfaces of the mating flange and the coupling device are in contact, reducing the contact area and reducing the gaps formed by particles.

[0014] 2. The submersible sewage pump coupling seal structure of the present utility model is provided with two semicircular raised sealing water lines at the mating end of the sealing gasket and the coupling device, which can better compensate for the change in the compression amount of the sealing gasket caused by manufacturing errors, and solve the problem that when the submersible sewage pump and the mating flange assembly slide down along the guide rod and contact the mating surface of the coupling device, the O-ring or sealing strip falls off, resulting in a gap between the outlet of the submersible sewage pump and the mating flange assembly and the inlet sealing surface of the coupling device, and the leakage problem caused by the particles between the sealing surfaces also causing a gap in the sealing surface, thereby reducing the operation of the submersible sewage pump deviating from the operating point, resulting in a decrease in operation reliability and operation efficiency, and even the problem that the use requirements cannot be met; the submersible sewage pump coupling seal and positioning device reduces leakage and ensures the stable and reliable operation of the pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below with reference to the accompanying drawings.

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 is a schematic structural view of the mating flange in the present utility model;

[0018] Figure 3 is a front view of the present utility model;

[0019] Figure 4 is Figure 3 an enlarged view of part A of

[0020] Figure 5 is a schematic structural view of the sealing water line in the present utility model;

[0021] Figure 6 is a schematic structural view of the mating structure of the boss and the mating flange in the present utility model;

[0022] Figure 7 is a side view of the mating flange in the present utility model;

[0023] In the figure: 1, coupling device; 2, guiding frame; 3, guide rod; 4, mating flange; 5, submersible sewage pump; 6, sealing gasket; 7, sealing water line; 8, boss. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] Such as Figures 1 to 7As shown in the figure, a submersible sewage pump coupling sealing structure according to an embodiment of the present utility model includes a coupling device 1 and a submersible sewage pump 5; a mating flange 4 is installed between the coupling device 1 and the submersible sewage pump 5; the mating flange 4 and the submersible sewage pump 5 are connected by a flange; grooves are formed on both sides of the top of the mating flange 4; a sealing gasket 6 is installed inside the grooves; four sets of bosses 8 are fixedly connected to the surface of the mating flange 4; the bosses 8 are arranged in a circumferential array on the mating flange 4; the bosses 8 are arranged on the side wall of the mating flange 4 close to the coupling device 1. During operation, by arranging four sets of bosses 8 on the mutually approaching planes of the mating flange 4 and the coupling device 1, the end surfaces of the bosses 8 and the mating flange 4 can be in contact, reducing the contact area and reducing the gaps caused by fine particles; a groove is machined on each side of the mating flange 4, and the sealing gasket 6 is installed inside the groove, making the sealing gasket 6 arranged in an "I" shape, and at the same time making the other end of the sealing gasket 6 cooperate with the outlet position of the submersible sewage pump 5 to achieve a sealing effect.

[0026] As Figure 3 shown in the figure, a guide rod 3 is installed in the middle of the coupling device 1; a guiding frame 2 is installed in the middle of the guide rod 3. During operation, first, the mating flange 4 and the submersible sewage pump 5 are installed and connected, and then the guiding frame 2 and the mating flange 4 are fixed by positioning bolts. At this time, by sliding the guiding frame 2 downward along the surface of the guide rod 3, the mating flange 4 and the submersible sewage pump 5 are driven to move towards the position close to the end face of the coupling device 1. When the guiding frame 2 moves to the set position, the mating outlet position of the mating flange 4 and the submersible sewage pump 5 is aligned with the inlet end face of the coupling device 1. At this time, the submersible sewage pump 5 and the coupling device 1 are connected and fixed, making the ports of the coupling device 1 and the submersible sewage pump 5 easier to align and making the installation of the coupling device 1 and the submersible sewage pump 5 more convenient.

[0027] As Figure 5 shown in the figure, a pair of sealing water lines 7 are formed on the surface of the sealing gasket 6; the sealing water lines 7 are arranged as semi-circular protrusions. During operation, by forming a pair of sealing water lines 7 on the surface of the sealing gasket 6, the change in the compression amount of the sealing gasket 6 caused by manufacturing errors can be compensated well, and the problem that when the submersible sewage pump 5 and the mating flange 4 slide down along the guide rod 3 and come into contact with the mating surface of the mating flange 4, the sealing gasket 6 falls off, resulting in gaps in the sealing between the mating outlet position of the submersible sewage pump 5 and the mating flange 4 and the inlet port of the coupling device 1 can be solved well.

[0028] The height of a pair of the sealing water lines 7 is set between 1 - 1.5 mm; the interval between a pair of the sealing water lines 7 is set between 10 - 15 mm.

[0029] The compression amount of the sealing gasket 6 is set between 21% - 28%; the height of the boss 8 is set between 1.5 - 2.5 mm.

[0030] Working principle: This device uses a sealing gasket 6 to replace the original O-ring or sealing strip. In cooperation with the positioning boss 8, it contacts the mating surface end of the coupling device 1, reducing the contact area and the gaps formed by particles. On both sides of the mating flange 4, a groove step is machined, and the sealing gasket 6 is installed on the mating flange 4. The mating end of the sealing gasket 6 and the coupling device 1 is provided with two semicircular raised sealing water lines 7, which can better compensate for the change in the compression amount of the sealing gasket 6 caused by manufacturing errors. When the submersible pump 5 and the mating flange 4 assembly slide down along the guide rod 3 and contact the mating surface of the coupling device 1, the O-ring or sealing strip may fall off, resulting in a gap between the outlet of the combination of the submersible pump 5 and the mating flange 4 and the inlet sealing surface of the coupling device 1. The particles between the sealing surfaces also cause gaps in the sealing surfaces, leading to leakage problems. Thus, it reduces the operation of the submersible pump 5 deviating from the operating point, which may cause a decrease in operation reliability and efficiency, or even fail to meet the usage requirements. The coupling seal and positioning device of the submersible pump 5 reduces leakage and ensures the stable and reliable operation of the pump system.

[0031] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A submersible sewage pump coupling seal structure, comprising a coupling device (1) and a submersible sewage pump (5); characterized in that: A matching flange (4) is installed between the coupling device (1) and the submersible sewage pump (5); the matching flange (4) and the submersible sewage pump (5) are connected via a flange; grooves are provided on both sides of the top of the matching flange (4); a sealing rubber pad (6) is installed inside the groove; four groups of bosses (8) are fixedly connected to the surface of the matching flange (4); the bosses (8) are arranged in a circular array on the matching flange (4); and the bosses (8) are arranged on a side wall of the matching flange (4) close to the coupling device (1).

2. A submersible sewage pump coupling seal structure according to claim 1, characterized in that: A guide rod (3) is installed in the middle of the coupling device (1); and a guide frame (2) is installed in the middle of the guide rod (3).

3. A submersible sewage pump coupling seal structure according to claim 2, characterized in that: A pair of sealing water lines (7) are provided on the surface of the sealing rubber pad (6); the sealing water lines (7) are arranged in the form of semicircular protrusions.

4. A submersible sewage pump coupling seal structure according to claim 3, characterized in that: The height of the pair of sealing water lines (7) is set between 1 and 1.5 mm; and the interval between the pair of sealing water lines (7) is set between 10 and 15 mm.

5. A submersible sewage pump coupling seal structure according to claim 4, characterized in that: The compression amount of the sealing rubber pad (6) is set between 21% and 28%; and the height of the boss (8) is set between 1.5 and 2.5 mm.

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