Leakage-free double-screw pump

Abstract

The utility model belongs to the technical field of double-screw pumps, and discloses a leakage-free double-screw pump which comprises a shell body, driving shafts, sealing sleeves and an adjusting assembly, the driving shafts are symmetrically installed on the inner wall of the shell body, the sealing sleeves are fixedly connected to the ends of the driving shafts in a sleeved mode, and the adjusting assembly comprises a connecting pipe and an opening and closing structure. The connecting pipe, the sealing block, the lifting plate and the like are arranged, in the using process, the internal pressure of equipment is gradually increased, and when the pressure is larger than the repulsive force between the magnet and the magnetic strip, the lifting plate is pushed to move downwards under the action of the pressure, so that the magnetic strip is driven to rotate, and the magnetic strip is driven to rotate. The sealing block is forced to be separated from the interior of the water inlet, then the connecting pipe is opened, liquid is conveyed back to the input end of the driving shaft, the purpose of reducing the internal pressure is achieved, and the problem of leakage caused by the fact that an existing double-screw pump cannot automatically adjust the internal pressure is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of twin-screw pumps, and in particular relates to a leakage-free twin-screw pump. Background Art

[0002] At present, when a twin-screw pump is in operation, its internal pressure is relatively high and the equipment itself cannot reduce the pressure. If the internal pressure of the equipment continues to rise, the sealing gasket is forced to operate in a high-pressure environment for a long time, which can easily cause the gap between it and the pump body to become larger and cause leakage. Therefore, a leak-free twin-screw pump is designed to solve the problem that the current twin-screw pump cannot adjust the internal pressure by itself, thus causing leakage. Utility Model Content

[0003] The utility model aims to provide a leakage-free twin-screw pump to solve the problem in the above background technology that the current twin-screw pump cannot adjust the internal pressure by itself, thus causing leakage.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a leakage-free twin-screw pump comprises a shell body, a driving shaft, a sealing sleeve and an adjustment assembly, the driving shaft is symmetrically installed on the inner wall of the shell body, and the ends of the driving shaft are both sleeved and fixed with sealing sleeves, the adjustment assembly comprises a connecting pipe and an opening and closing structure, the connecting pipe is arranged inside the shell body and is located below the driving shaft, the connecting pipe is a U-shaped pipe, and the ports on both sides of the connecting pipe are respectively located on both sides of the driving shaft, the opening and closing structure is installed at the port of the connecting pipe, and the opening and closing structure is used to control the opening and closing of the connecting pipe.

[0005] Preferably, the adjustment assembly also includes a connecting tube, a lifting plate, a sealing block and a water inlet, a connecting tube is installed at the end of the connecting pipe and between the sealing sleeve and the driving shaft, the diameter of the connecting tube is larger than the diameter of the connecting pipe, and a water inlet is opened on the top of the connecting tube, the lifting plate is slidably arranged inside the connecting tube, and a sealing block is arranged on the upper end surface of the lifting plate, and the sealing block is embedded in the water inlet.

[0006] Preferably, magnets are symmetrically installed on both sides of the lifting plate, sliding holes are symmetrically opened inside the shell body and below the lifting plate, and magnetic strips are arranged inside the sliding holes.

[0007] Preferably, a sliding plate is slidably arranged inside the sliding hole, and rubber blocks are symmetrically installed at the ports on both sides of the inner wall of the sliding hole. A groove is opened in the middle of the surface of the sliding plate, and the side wall of the sliding plate is in contact with the rubber block, and the magnetic strip is arranged inside the groove.

[0008] Preferably, the thickness of the sealing block is smaller than the depth of the water inlet, a filter screen is provided on the top of the inner wall of the water inlet, and the top of the filter screen is flush with the top of the connecting tube.

[0009] Preferably, a one-way valve is installed on the end of the connecting pipe away from the sealing sleeve.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) The utility model is provided with a connecting pipe, a sealing block and a lifting plate. When in use, the internal pressure of the equipment gradually increases. When the pressure is greater than the repulsive force between the magnet and the magnetic strip, the lifting plate is pushed downward by the pressure, forcing the sealing block to separate from the inside of the water inlet, thereby opening the connecting pipe and transporting the liquid back to the input end of the driving shaft, thereby achieving the purpose of reducing the internal pressure and solving the problem that the current twin-screw pump cannot adjust the internal pressure by itself, thus causing leakage.

[0012] (2) The utility model is provided with a sliding plate, a sliding hole and a rubber block, etc., and while coping with different conveying pressures, the sliding plate can be pushed to force its end to move to the outside of the sliding hole after squeezing the rubber block, and the magnetic strip inside the groove can be replaced, thereby adjusting the repulsive force between the magnetic strip and the magnet, and then adjusting the opening standard of the connecting pipe, thereby achieving the effect of coping with different conveying pressures. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 for Figure 1 A in the enlarged view;

[0016] In the figure: 1. sealing sleeve; 2. driving shaft; 3. connecting pipe; 4. one-way valve; 5. shell body; 6. filter screen; 7. rubber block; 8. sliding plate; 9. magnetic strip; 10. sliding hole; 11. water inlet; 12. connecting tube; 13. magnet; 14. sealing block; 15. lifting plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-Figure 3As shown, the utility model provides the following technical solutions: a leak-free twin-screw pump includes a shell body 5, a driving shaft 2, a sealing sleeve 1 and an adjustment component. The driving shaft 2 is symmetrically installed on the inner wall of the shell body 5, and the ends of the driving shaft 2 are sleeved and fixed with sealing sleeves 1. The adjustment component includes a connecting pipe 3 and an opening and closing structure. The connecting pipe 3 is arranged inside the shell body 5 and is located below the driving shaft 2. The connecting pipe 3 is a U-shaped pipe, and the ports on both sides of the connecting pipe 3 are respectively located on both sides of the driving shaft 2. The opening and closing structure is installed at the port of the connecting pipe 3, and the opening and closing structure is used to control the opening and closing of the connecting pipe 3. The adjustment component also includes a connecting tube 12, a lifting plate 15, a sealing block 14 and a water inlet 11, a connecting tube 12 is installed at the end of the connecting pipe 3 and between the sealing sleeve 1 and the driving shaft 2, the diameter of the connecting tube 12 is larger than the diameter of the connecting pipe 3, and a water inlet 11 is opened on the top of the connecting tube 12, the lifting plate 15 is slidably arranged inside the connecting tube 12, and a sealing block 14 is arranged on the upper end surface of the lifting plate 15, and the sealing block 14 is embedded in the water inlet 11, magnets 13 are symmetrically installed on both sides of the lifting plate 15, and sliding holes 10 are symmetrically opened inside the shell body 5 and below the lifting plate 15, and a magnetic strip 9 is arranged inside the sliding hole 10.

[0019] Through the above technical solution: when in use, the internal pressure of the equipment gradually increases. When the pressure is greater than the repulsive force between the magnet 13 and the magnetic strip 9, the lifting plate 15 is pushed downward inside the connecting tube 12 under the action of pressure, forcing the sealing block 14 to separate from the water inlet 11, and then opening the connecting pipe 3. The liquid enters the connecting pipe 3 through the connecting tube 12 under the action of pressure, and is transported back to the input end of the driving shaft 2 through the connecting pipe 3. At this time, the pressure inside the equipment gradually decreases with the transportation of the liquid. When the repulsive force is greater than the pressure, under the action of the repulsive force, the lifting plate 15 drives the sealing block 14 to reset and close the connecting pipe 3, thereby achieving the purpose of reducing the internal pressure, solving the problem that the current twin-screw pump cannot adjust the internal pressure by itself, thereby causing leakage.

[0020] See also Figure 1-Figure 3 As shown, a sliding plate 8 is slidably arranged inside the sliding hole 10, and rubber blocks 7 are symmetrically installed at the ports on both sides of the inner wall of the sliding hole 10, a groove is opened in the middle of the surface of the sliding plate 8, and the side wall of the sliding plate 8 is in contact with the rubber block 7, the magnetic strip 9 is arranged inside the groove, the thickness of the sealing block 14 is less than the depth of the water inlet 11, a filter screen 6 is arranged on the top of the inner wall of the water inlet 11, and the top of the filter screen 6 is flush with the top of the connecting tube 12, and a one-way valve 4 is installed on the connecting pipe 3 and on the end of one side away from the sealing sleeve 1.

[0021] Through the above technical solution: while coping with different delivery pressures, the sliding plate 8 can be pushed to force its end to move to the outside of the sliding hole 10 after squeezing the rubber block 7, and the magnetic strip 9 inside the groove can be replaced, thereby adjusting the repulsive force between the magnetic strip 9 and the magnet 13, and then adjusting the opening standard of the connecting pipe 3 to achieve the effect of coping with different delivery pressures. When conveying liquid with particles, the filter screen 6 can be used to prevent the particles from entering the inside of the connecting pipe 3, thereby reducing the problem of clogging of the connecting pipe 3, and the installation of the one-way valve limits the flow direction of the connecting pipe 3, thereby eliminating the possible backflow problem of the connecting pipe 3.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak-free twin-screw pump, characterized in that: The invention comprises a housing body (5), a driving shaft (2), a sealing sleeve (1) and an adjustment component. The driving shaft (2) is symmetrically mounted on the inner wall of the housing body (5). The ends of the driving shaft (2) are sleeved and fixed with sealing sleeves (1). The adjustment component comprises a connecting pipe (3) and an opening and closing structure. The connecting pipe (3) is arranged inside the housing body (5) and below the driving shaft (2). The connecting pipe (3) is a U-shaped pipe, and ports on both sides of the connecting pipe (3) are respectively located on both sides of the driving shaft (2). The opening and closing structure is mounted at the port of the connecting pipe (3), and the opening and closing structure is used to control the opening and closing of the connecting pipe (3).

2. A leak-free twin-screw pump according to claim 1, characterized in that: The adjustment assembly further comprises a connecting tube (12), a lifting plate (15), a sealing block (14) and a water inlet (11); the connecting tube (12) is installed at the end of the connecting tube (3) and between the sealing sleeve (1) and the driving shaft (2); the diameter of the connecting tube (12) is larger than the diameter of the connecting tube (3); the top of the connecting tube (12) is provided with a water inlet (11); the lifting plate (15) is slidably arranged inside the connecting tube (12); the sealing block (14) is arranged on the upper end surface of the lifting plate (15); and the sealing block (14) is embedded in the water inlet (11).

3. A leak-free twin-screw pump according to claim 2, characterized in that: Magnets (13) are symmetrically installed on both sides of the lifting plate (15), and sliding holes (10) are symmetrically opened inside the shell body (5) and below the lifting plate (15), and magnetic strips (9) are arranged inside the sliding holes (10).

4. A leak-free twin-screw pump according to claim 3, characterized in that: A sliding plate (8) is slidably arranged inside the sliding hole (10), and rubber blocks (7) are symmetrically installed at the ports on both sides of the inner wall of the sliding hole (10), a groove is opened in the middle of the surface of the sliding plate (8), and the side wall of the sliding plate (8) is in contact with the rubber block (7), and the magnetic strip (9) is arranged inside the groove.

5. A leak-free twin-screw pump according to claim 3, characterized in that: The thickness of the sealing block (14) is smaller than the depth of the water inlet (11); a filter screen (6) is provided at the top of the inner wall of the water inlet (11); and the top of the filter screen (6) is flush with the top of the connecting tube (12).

6. A leak-free twin-screw pump according to claim 3, characterized in that: A one-way valve (4) is installed on the end of the connecting pipe (3) which is away from the sealing sleeve (1).

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