Novel double-seal water pump

Abstract

The invention discloses a double-sealed novel water pump which comprises a pump body and a pump shell, the pump shell is matched with the pump body, a motor is installed at the bottom end of the pump body, an impeller is installed at the top end of the pump body, the output end of the motor is fixedly connected with the impeller, an internal sealing ring is installed on the pump body, and a plurality of annular reserved cavities which are annularly arranged at equal intervals are formed in the pump body. According to the scheme, the cross section of the internal sealing ring is arranged to be in the L shape, the contact area between the internal sealing ring and the pump body and the contact area between the internal sealing ring and the pump shell are increased, and the service life of the internal sealing ring is prolonged; a gap generated between the inner sealing ring and the pump shell can be filled in time in a vibration environment through the arrangement of the annular expansion bag, second-layer sealing is achieved through the arrangement of the outer sealing assembly, the stability of the mounting hole is enhanced, leaked liquid is absorbed through the water absorption ring, and the threaded connection position between the extrusion ring and the pump shell is blocked.

Description

Technical Field

[0001] The present invention relates to the technical field of water pump sealing, and more particularly to a novel water pump with double sealing. Background Art

[0002] A centrifugal pump is a common power pump used to transport liquids. It works based on the principle of centrifugal force, sucking liquid from the inlet and pushing it to the outlet through centrifugal force. The working principle of a centrifugal pump is that when the motor drives the pump shaft to rotate, the impeller will also rotate. Due to the rotation of the impeller, the liquid is pushed to the outer edge of the impeller by centrifugal force, forming a high-pressure area. At the same time, a low-pressure area is formed in the center of the impeller. This pressure difference drives the liquid to be sucked in from the inlet, flows through the pump body, and is finally pushed to the outlet.

[0003] Centrifugal pumps are widely used in industries, construction, agriculture, water supply and drainage systems, etc. to transport liquids such as water, petroleum, chemical liquids, etc. They are efficient, stable, reliable, and suitable for applications with various flow and head requirements.

[0004] In an existing centrifugal pump, a sealing ring is usually provided between the pump body and the pump casing. The function of the sealing ring is to prevent liquid from leaking from the connection between the pump casing and the pump body. The sealing ring is filled in the flange connection and achieves sealing through compression and deformation. However, the sealing effect of the sealing ring alone is not ideal, because during long-term use, the sealing ring itself will gradually age. In addition, the centrifugal pump is affected by the rotation of the impeller and is in a vibrating environment for a long time. The screws used to connect the pump body and the pump casing may become loose, which will also cause the gap between the sealing ring and the pump casing to become larger, causing liquid leakage.

[0005] Therefore, in response to the above-mentioned technical problems, it is necessary to provide a new type of water pump with double sealing. Summary of the invention

[0006] The purpose of the present invention is to provide a new type of water pump with double sealing. In this scheme, the cross-section of the internal sealing ring is set to be L-shaped, which increases the contact area between the internal sealing ring and the pump body and the pump casing, and prolongs the service life of the internal sealing ring. Through the setting of the magnet, one end of the internal sealing ring is made to be close to the inner wall of the pump casing. Through the setting of the annular expansion bag, the gap between the internal sealing ring and the pump casing can be filled in time in a vibration environment. Through the setting of the external sealing component, the second layer of sealing is realized, and the stability of the mounting hole is enhanced. The leaked liquid is absorbed by the water absorption ring, and the threaded connection between the extrusion ring and the pump casing is blocked.

[0007] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows: A new type of double-sealed water pump comprises a pump body and a pump casing, the pump casing matches the pump body, a motor is installed at the bottom end of the pump body, and an impeller is installed at the top end of the pump body, the output end of the motor is fixedly connected to the impeller, an internal sealing ring is installed on the pump body, and a plurality of annular reserved cavities arranged in an annular shape and equidistant therefrom are provided on the pump body, the annular reserved cavities are located on the outside of the internal sealing ring, a plurality of screws matching the annular reserved cavities are provided on the pump casing, and the screws are provided with threads connected to the annular reserved cavities, an inlet pipe and an outlet pipe connected to the inner cavity are respectively integrally formed on the pump casing, and an external sealing assembly is provided on the outside of the pump casing, the cross-section of the internal sealing ring is set to be L-shaped, and the interior of the internal sealing ring is provided with a plurality of magnets provided in the inner cavity, and an annular expansion bag is installed inside the internal sealing ring.

[0008] As a further improvement of the present invention, the plurality of magnets are arranged in a ring shape with equal distances, and the plurality of magnets are all mounted on the inner wall close to one side of the pump casing.

[0009] As a further improvement of the present invention, the inner cavity of the annular expansion bladder is provided with a plurality of friction components, and the plurality of friction components are arranged in an annular shape and at equal intervals.

[0010] As a further improvement of the present invention, the friction assembly comprises a plurality of first support blocks and a plurality of second support blocks respectively, and the plurality of first support blocks and the plurality of second support blocks are arranged at equal distances and staggered with each other.

[0011] As a further improvement of the present invention, the first support block is installed at the top end of the inner wall of the annular expansion bladder, and the second support block is installed at the bottom end of the inner wall of the annular expansion bladder. The adjacent first support blocks and second support blocks abut against each other, and the adjacent first support blocks and second support blocks are fixedly connected with multiple friction blocks near one end.

[0012] As a further improvement of the present invention, a plurality of heat conductive wires are provided on one side of the first support block and the second support block connected to the annular expansion bladder, one end of the heat conductive wire extends to the interior of the annular expansion bladder, and the other end of the heat conductive wire extends to the interior of the first support block and the second support block respectively.

[0013] As a further improvement of the present invention, the external sealing assembly includes an extrusion ring, which is threadedly connected to the outer end of the pump housing, and the bottom end of the extrusion ring and the top end of the pump body are both installed with matching external sealing rings.

[0014] As a further improvement of the present invention, a handle is fixedly connected to the top of the extrusion ring, and a pair of mutually symmetrical positioning blocks are fixedly connected to the outer end of the extrusion ring, and positioning columns are inserted into the positioning blocks.

[0015] As a further improvement of the present invention, the pump body is provided with a plurality of positioning holes which are arranged in an annular shape and at equal intervals, and the positioning holes match the positioning posts.

[0016] As a further improvement of the present invention, a water absorption ring is installed at the bottom end of the extrusion ring, and the water absorption ring is located at the edge of the inner side of the extrusion ring.

[0017] Compared with the prior art, the advantages of the present invention are: (1) In this solution, the cross-section of the internal sealing ring is set to be L-shaped, so that the internal sealing ring has two sealing surfaces and the contact area between the pump body and the pump casing is larger, which can more effectively prevent liquid leakage. At the same time, the internal sealing ring thus set can better resist pressure, tension and torsion, thereby reducing the wear and damage of the internal sealing ring and extending its service life.

[0018] (2) In this scheme, a magnet is arranged inside the internal sealing ring. The magnet will be attracted by the inner wall of the pump casing, so that the multiple magnets drive the internal sealing ring to deform, so that one end of the internal sealing ring is pressed against the inner wall of the pump casing, and the contact between the internal sealing ring and the inner wall of the pump casing is made tighter, thereby reducing the possible gap between the internal sealing ring and the inner wall of the pump casing and enhancing the sealing effect.

[0019] (3) In this scheme, an annular expansion bag is arranged inside the internal sealing ring, and multiple friction components are arranged inside the annular expansion bag. When the centrifugal pump is affected by vibration and a gap appears between the pump body and the pump casing, the friction component will quickly release heat due to the vibration, and cause the annular expansion bag to expand, thereby driving the internal sealing ring to expand. This expansion can cause the top end of the internal sealing ring to abut against the bottom end of the pump casing, thereby filling the existing gap, so that the pump casing and the internal sealing ring are always in close contact, thereby enhancing the sealing effect of the internal sealing ring and reducing the impact of vibration on the sealing performance.

[0020] (4) This solution can achieve a second layer of sealing based on the internal sealing ring through a pair of external sealing rings. Even if the liquid leaks through the internal sealing ring, the external sealing ring can block the liquid. At the same time, the torque force applied to the pump casing by the extrusion ring can enhance the abutment strength between the inner wall of the mounting hole and the screw, thereby reducing the shaking degree of the screw and slowing down its loosening speed in the vibration environment of the centrifugal pump.

[0021] (5) This scheme can absorb the liquid leaked from the centrifugal pump through the internal sealing ring through the water absorption ring, and block the threaded connection between the extrusion ring and the pump casing, thereby preventing the liquid from leaking out through the threaded connection. This arrangement provides an additional sealing structure between the external sealing ring and the internal sealing ring, further preventing liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the partial explosion structure of the present invention; Figure 3 It is a partial front cross-sectional structural schematic diagram of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A in the middle; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at C in the middle; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at D in the middle; Figure 7 For the present invention Figure 3 Schematic diagram of the structure at point B in the middle.

[0023] Description of the numbers in the figure: 1. Pump body; 2. Motor; 3. Pump casing; 4. Import pipeline; 5. Export pipeline; 6. Impeller; 7. Internal sealing ring; 8. External sealing assembly; 801. Extrusion ring; 802. External sealing ring; 803. Positioning block; 804. Positioning column; 805. Water absorption ring; 806. Handle; 9. Magnet; 10. Annular expansion bladder; 11. Friction assembly; 1101. First support block; 1102. Second support block; 1103. Friction block; 1104. Heat conducting wire; 12. Positioning hole; 13. Mounting hole; 14. Threaded hole; 15. Screw; 16. Annular reserved cavity. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0025] Example:

[0026] See also Figure 1-2 A new type of double-sealed water pump comprises a pump body 1 and a pump casing 3, the pump casing 3 is matched with the pump body 1, a motor 2 is installed at the bottom end of the pump body 1, and an impeller 6 is installed at the top end of the pump body 1, the output end of the motor 2 is fixedly connected to the impeller 6, an internal sealing ring 7 is installed on the pump body 1, and a plurality of annular reserved cavities 16 arranged in an annular shape and equidistantly are opened on the pump body 1, the annular reserved cavity 16 is located on the outer side of the internal sealing ring 7, a plurality of screws 15 matching the annular reserved cavity 16 are opened on the pump casing 3, 17 is arranged in the screw 15, 17 is threadedly connected with the annular reserved cavity 16, an inlet pipe 4 and an outlet pipe 5 connected with the inner cavity are respectively integrally formed on the pump casing 3, and an external sealing component 8 is arranged on the outer side of the pump casing 3, the cross section of the internal sealing ring 7 is set to be L-shaped, and 18 is opened inside the internal sealing ring 7, the inner cavity of 18 is provided with a plurality of magnets 9, and an annular expansion bag 10 is installed inside the internal sealing ring 7.

[0027] A centrifugal pump is a common power pump used to transport liquids. It works based on the principle of centrifugal force, sucking liquid from the inlet pipe 4 and pushing it to the outlet pipe 5 through centrifugal force. The working principle of the centrifugal pump is that when the motor 2 drives the impeller 6 to rotate, due to the rotation of the impeller 6, the liquid is pushed to the outer edge of the impeller 6 by the centrifugal force, forming a high-pressure area. At the same time, a low-pressure area is formed in the center of the impeller 6. This pressure difference drives the liquid to be sucked in from the inlet pipe 4, flows through the pump body, and is finally pushed to the outlet pipe 5.

[0028] Existing centrifugal pumps usually have a sealing ring between the pump body and the pump casing. The sealing ring is used to prevent liquid from leaking from the connection between the pump casing and the pump body. It is filled in the flange connection and achieves sealing through compression and deformation. However, the sealing effect achieved by the sealing ring alone is not ideal, because the sealing ring itself will gradually age during long-term use.

[0029] In this solution, the cross-section of the internal sealing ring 7 is set to be L-shaped, and the user buckles the pump casing 3 on the upper end of the pump body 1, and tightens a plurality of screws 15 so that the screws 15 pass through the mounting holes 13 and are threadedly connected to the threaded holes 14, so that the pump casing 3 is tightly abutted against the upper end of the pump body 1, and the internal sealing ring 7 is squeezed. The internal sealing ring 7 with an L-shaped cross-section can be filled in the bottom and inner end areas of the pump casing 3 at the same time. It has two sealing surfaces, and the contact area between the pump body 1 and the pump casing 3 is larger, which can more effectively prevent liquid leakage. At the same time, the internal sealing ring 7 set in this way can better resist pressure, tension and torque, thereby reducing the wear and damage of the internal sealing ring 7 and extending its service life.

[0030] See also Figure 3-4 , multiple magnets 9 are arranged in a ring shape with equal distances, and multiple magnets 9 are installed on the inner wall 18 close to the side of the pump housing 3.

[0031] In this solution, the pump casing 3 is made of metal, which means that when the pump casing 3 is installed on the top of the pump body 1, the magnet 9 will be attracted by the inner wall of the pump casing 3. With this arrangement, multiple magnets 9 can move in the annular reserved cavity 16 and drive the internal sealing ring 7 to deform, so that one end of the internal sealing ring 7 is close to the inner wall of the pump casing 3. With this arrangement, the contact between the internal sealing ring 7 and the inner wall of the pump casing 3 can be made closer, thereby reducing the possible gap between the internal sealing ring 7 and the inner wall of the pump casing 3 and enhancing the sealing effect.

[0032] See also Figure 3-6 The inner cavity of the annular expansion bladder 10 is provided with a plurality of friction components 11, and the plurality of friction components 11 are arranged in an annular manner with equal distances. The friction components 11 respectively include a plurality of first support blocks 1101 and a plurality of second support blocks 1102, and the plurality of first support blocks 1101 and the plurality of second support blocks 1102 are arranged in an equal distance and staggered with each other. The first support blocks 1101 are installed at the top end of the inner wall of the annular expansion bladder 10, and the second support blocks 1102 are installed at the bottom end of the inner wall of the annular expansion bladder 10. The adjacent first support blocks 1101 The first support block 1101 and the second support block 1102 are abutted against each other, and the adjacent first support block 1101 and the second support block 1102 are fixedly connected with a plurality of friction blocks 1103 at one end close to each other, and a plurality of heat conductive wires 1104 are arranged on the side where the first support block 1101 and the second support block 1102 are connected to the annular expansion bag 10, one end of the heat conductive wire 1104 extends to the interior of the annular expansion bag 10, and the other end of the heat conductive wire 1104 extends to the interior of the first support block 1101 and the second support block 1102 respectively.

[0033] The centrifugal pump is affected by the rotation of the impeller 6 and is in a vibrating environment for a long time. The screw 15 used to connect the pump body 1 and the pump casing 3 may become loose during the vibration, which will cause the gap between the external sealing component 8 and the pump casing 3 to become larger, resulting in liquid leakage.

[0034] In this solution, when the pump casing 3 is installed on the pump body 1, the bottom end of the pump casing 3 tightly squeezes the internal sealing ring 7, thereby squeezing the annular expansion bag 10 inside the internal sealing ring 7, so that the upper and lower ends of the multiple first support blocks 1101 and the multiple second support blocks 1102 are in contact with the inner wall of the annular expansion bag 10, forming support for the annular expansion bag 10. Once the screw 15 becomes loose, a gap will appear between the pump casing 3 and the internal sealing ring 7, and the internal sealing ring 7 will become loose. At this time, a gap will also appear between the first support block 1101 and the second support block 1102 and the inner wall of the annular expansion bag 10. Since the centrifugal pump is in a vibrating environment, the vibration will cause continuous friction between the first support block 1101 and the second support block 1102.

[0035] The first support block 1101 and the second support block 1102 can be set as a ceramic-based composite material. The ceramic-based friction material is usually composed of a ceramic matrix and an added friction agent. The ceramic matrix usually adopts high-temperature ceramic materials, such as aluminum oxide, silicon nitride, etc. The friction agent is a material added to the ceramic matrix, and has a high friction coefficient and thermal conductivity. During the friction process, the friction agent of the ceramic-based friction material rubs against the corresponding friction surface, which will generate a large amount of heat. Since the ceramic material has excellent thermal conductivity, it can quickly conduct the heat generated by friction to the surrounding environment to achieve rapid heat release. At the same time, the ceramic material itself has high strength and hardness, and can provide good durability and wear resistance. The heat released by the first support block 1101 and the second support block 1102 will be absorbed by the annular expansion bag 10.

[0036] The annular expansion bladder 10 can be configured as a thermal expansion particle composite material. When the thermal expansion particle composite material is heated, the thermal expansion particles inside it will expand rapidly. Due to the bonding force between the thermal expansion particles and the matrix material, the overall material will also expand accordingly. As the annular expansion bladder 10 expands, the internal sealing ring 7 can expand. This expansion can cause the top end of the internal sealing ring 7 to abut against the bottom end of the pump casing 3, thereby filling the existing gap, so that the pump casing 3 and the internal sealing ring 7 always maintain close abutment, thereby enhancing the sealing effect of the internal sealing ring 7.

[0037] The heat conductive wire 1104 can be set to copper. Copper wire has good thermal conductivity and can realize heat conduction in flexible applications. It has high strength and flexibility and is suitable for use in situations where heat conduction is required. The setting of the heat conductive wire 1104 can help the heat released by the first support block 1101 and the second support block 1102 to be quickly introduced into the interior of the annular expansion bag 10, thereby accelerating the expansion speed of the annular expansion bag 10 and avoiding liquid leakage. The setting of multiple friction blocks 1103 can enhance the friction between the first support block 1101 and the second support block 1102, so that they can quickly generate heat during friction.

[0038] See also Figure 1-3 and 7, the external sealing assembly 8 includes an extrusion ring 801, which is threadedly connected to the outer end of the pump housing 3, and the bottom end of the extrusion ring 801 and the top end of the pump body 1 are both equipped with matching external sealing rings 802, a handle 806 is fixedly connected to the top end of the extrusion ring 801, and a pair of mutually symmetrical positioning blocks 803 are fixedly connected to the outer end of the extrusion ring 801, and a positioning column 804 is inserted in the positioning block 803, and a plurality of positioning holes 12 arranged equidistantly in a ring shape are opened on the pump body 1, and the positioning holes 12 match the positioning columns 804.

[0039] After the user installs the pump housing 3 on the pump body 1, the user can drive the extrusion ring 801 to rotate on the outer end of the pump housing 3 by turning the handle 806, so that the extrusion ring 801 moves downward until a pair of external sealing rings 802 fit tightly. Then the user can insert a pair of positioning columns 804 into the positioning blocks 803 and the corresponding positioning holes 12 respectively, to limit the current position of the extrusion ring 801, prevent the extrusion ring 801 from rotating, and maintain the close contact of the pair of external sealing rings 802, so as to realize the second layer of sealing based on the present scheme outside the internal sealing ring 7 through the pair of external sealing rings 802. Even if the liquid leaks through the internal sealing ring 7, the liquid can be blocked by the external sealing ring 802.

[0040] At the same time, the torque force applied to the pump housing 3 by the extrusion ring 801 can enhance the abutment strength between the inner wall of the mounting hole 13 and the screw 15, thereby reducing the shaking degree of the screw 15 in the vibration environment of the centrifugal pump and slowing down its loosening speed.

[0041] See also Figure 7 A water absorption ring 805 is installed at the bottom end of the extrusion ring 801 , and the water absorption ring 805 is located at the edge of the inner side of the extrusion ring 801 .

[0042] The water absorption ring 805 can be set as a hydrogel. Hydrogel is a polymer compound with extremely high water absorption capacity. It can absorb water tens to hundreds of times its own weight and form a gel-like substance. After the gel is formed, the water is locked in the polymer network and is not easily released. When the hydrogel comes into contact with water, its molecular structure will expand. Therefore, once the liquid in the centrifugal pump leaks out through the internal sealing ring 7, it will first contact the water absorption ring 805 before contacting the external sealing ring 802 and be absorbed by the water absorption ring 805. The expansion of the water absorption ring 805 can block the threaded connection between the extrusion ring 801 and the pump housing 3, thereby preventing the liquid from leaking out through the threaded connection. With this arrangement, there is another sealing structure between the external sealing ring 802 and the internal sealing ring 7, thereby further preventing liquid leakage.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A new type of double-sealed water pump, comprising a pump body (1) and a pump casing (3), characterized in that: The pump housing (3) matches the pump body (1); a motor (2) is mounted on the bottom end of the pump body (1); an impeller (6) is mounted on the top end of the pump body (1); an output end of the motor (2) is fixedly connected to the impeller (6); an internal sealing ring (7) is mounted on the pump body (1); and the pump body (1) is provided with a plurality of threaded holes (14) arranged in an annular pattern and at equal intervals; the threaded holes (14) are located on the outside of the internal sealing ring (7); and the pump housing (3) is provided with a plurality of mounting holes (13) matching the threaded holes (14); the mounting holes (13) A screw rod (15) is provided inside, and the screw rod (15) is threadedly connected to the threaded hole (14); an inlet pipe (4) and an outlet pipe (5) which are connected to the inner cavity are formed integrally on the pump housing (3), and an external sealing component (8) is provided on the outer side of the pump housing (3); the cross section of the internal sealing ring (7) is set to be L-shaped, and an annular reserved cavity (16) is opened inside the internal sealing ring (7); a plurality of magnets (9) are provided in the inner cavity of the annular reserved cavity (16); and an annular expansion bag (10) is installed inside the internal sealing ring (7).

2. A new type of double-sealed water pump according to claim 1, characterized in that: The plurality of magnets (9) are arranged in a ring-shaped manner at equal intervals, and the plurality of magnets (9) are all mounted on the inner wall of (18) close to the side of the pump casing (3).

3. A new type of double-sealed water pump according to claim 1, characterized in that: The inner cavity of the annular expansion bag (10) is provided with a plurality of friction components (11), and the plurality of friction components (11) are arranged in an annular shape and at equal intervals.

4. A new type of double-sealed water pump according to claim 3, characterized in that: The friction assembly (11) comprises a plurality of first support blocks (1101) and a plurality of second support blocks (1102), respectively; the plurality of first support blocks (1101) and the plurality of second support blocks (1102) are arranged at equal distances and staggered with each other.

5. A new type of double-sealed water pump according to claim 4, characterized in that: The first support block (1101) is installed at the top end of the inner wall of the annular expansion bag (10), and the second support block (1102) is installed at the bottom end of the inner wall of the annular expansion bag (10). Adjacent first support blocks (1101) and second support blocks (1102) abut against each other, and adjacent first support blocks (1101) and second support blocks (1102) are fixedly connected with a plurality of friction blocks (1103) at one end close to each other.

6. A new type of double-sealed water pump according to claim 4, characterized in that: A plurality of heat-conducting wires (1104) are provided on one side of the first support block (1101) and the second support block (1102) connected to the annular expansion bag (10), one end of the heat-conducting wire (1104) extends into the interior of the annular expansion bag (10), and the other end of the heat-conducting wire (1104) extends into the interior of the first support block (1101) and the second support block (1102), respectively.

7. A new type of double-sealed water pump according to claim 1, characterized in that: The external sealing assembly (8) comprises an extrusion ring (801), wherein the extrusion ring (801) is threadedly connected to the outer end of the pump housing (3), and a matching external sealing ring (802) is installed at the bottom end of the extrusion ring (801) and the top end of the pump body (1).

8. A new type of double-sealed water pump according to claim 7, characterized in that: A handle (806) is fixedly connected to the top of the extrusion ring (801), and a pair of mutually symmetrical positioning blocks (803) are fixedly connected to the outer end of the extrusion ring (801), wherein positioning columns (804) are inserted into the positioning blocks (803).

9. A new type of double-sealed water pump according to claim 8, characterized in that: The pump body (1) is provided with a plurality of positioning holes (12) arranged in an annular shape and at equal intervals, and the positioning holes (12) match the positioning columns (804).

10. A new type of double-sealed water pump according to claim 7, characterized in that: A water absorption ring (805) is installed at the bottom end of the extrusion ring (801), and the water absorption ring (805) is located at the edge of the inner side of the extrusion ring (801).

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