Three-layer sealing structure of piston rod of clay delivery pump

Abstract

The utility model discloses a clay delivery pump piston rod three-layer sealing structure, and relates to the technical field of cylinder rod sealing, the clay delivery pump piston rod three-layer sealing structure comprises an outer sleeve, one side of the outer sleeve is provided with an air outlet end in a penetrating manner, the bottom end of the outer sleeve is connected with an air guide base, and the outer sleeve is internally provided with a sealing mechanism; the sealing mechanism seals a gap in the connecting position of the outer sleeve and the air cylinder rod, external clay is prevented from entering the outer sleeve in the displacement process of the air cylinder rod, a telescopic mechanism is arranged in the outer sleeve, and the telescopic mechanism conducts air pressure stretching and retracting on the bottom end of the air cylinder rod. And the telescopic size of the air cylinder rod is adjusted and controlled. The flexible U-shaped sealing gasket, the labyrinth sealing sleeve and the rigid annular blade are combined and jointly act on the air cylinder rod, the double-protection sealing effect is achieved, and meanwhile the connecting tightness of the outer side of the air cylinder rod is improved through the flexible U-shaped sealing gasket and the labyrinth sealing sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder rod seals, in particular to a three-layer sealing structure of a piston rod of a clay delivery pump. Background Art

[0002] The cylinder rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements. When the cylinder rod is used normally, the cylinder rod must withstand alternating loads and the surface must be rubbed back and forth. Therefore, the cylinder rod is required to have both high hardness and wear resistance. The structure of the cylinder rod is relatively simple.

[0003] Under high-pressure application requirements and frequent reciprocating motion conditions, excessive friction hinders the high-speed response of the cylinder output movement, and the wear of the seal is aggravated, causing the seal ring to lose its sealing function prematurely, resulting in air leakage and gas escape in the cylinder, thereby affecting the working performance and operation quality of the hydraulic cylinder, and even causing serious accidents. Summary of the invention

[0004] The purpose of the utility model is to provide a three-layer sealing structure for a piston rod of a clay conveying pump to solve the above-mentioned defects caused by the prior art.

[0005] The three-layer sealing structure of the piston rod of the clay conveying pump includes an outer sleeve, one side of the outer sleeve is penetrated by an air outlet, the bottom end of the outer sleeve is connected to an air guide base, a sealing mechanism is arranged inside the outer sleeve, the sealing mechanism seals the gap at the connection between the outer sleeve and the cylinder rod to prevent external clay from entering the inside of the outer sleeve during the displacement of the cylinder rod, and a telescopic mechanism is arranged inside the outer sleeve, the telescopic mechanism performs pneumatic telescoping on the bottom end of the cylinder rod, and then adjusts and controls the telescopic size of the cylinder rod.

[0006] Preferably, the sealing mechanism includes an outer sleeve, an air guide base, an annular blade and a positioning hole, the bottom end of the outer sleeve is provided with an air guide base, the top end of the air guide base is provided with an outer sleeve, the outer side of the cylinder rod is connected to a labyrinth sealing sleeve, a U-shaped sealing gasket is provided directly below the labyrinth sealing sleeve, an annular blade is provided directly above the U-shaped sealing gasket, the annular blade is provided inside the outer sleeve, and an internal stress hole is opened inside the U-shaped sealing gasket.

[0007] Preferably, the labyrinth sealing sleeve is connected to the inner end of the cylinder rod through a positioning hole opened through the top end.

[0008] Preferably, the telescopic mechanism includes an outer sleeve, an air guide base, a cylinder rod, a piston pad and a threaded rod. An air inlet end is opened through one side of the air guide base, a piston pad is arranged inside the air guide base, a threaded rod is arranged on the top of the piston pad, and the outer side of the threaded rod is connected to the cylinder rod.

[0009] Preferably, the cylinder rod is connected to the inside of the outer sleeve via a piston pad arranged at the bottom end.

[0010] Preferably, a flange is connected directly above the outer sleeve.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The flexible U-shaped gasket and the labyrinth sealing sleeve are combined with the hard annular blade to act on the cylinder rod together to play a double protective sealing role. At the same time, the flexible U-shaped gasket and the labyrinth sealing sleeve are used to increase the connection tightness of the outer side of the cylinder rod, blocking the high-temperature and high-pressure liquid and clay from advancing along the cylinder rod, thereby preventing clay and liquid from directly entering the inner part of the outer sleeve, and improving the stability of the operation of the cylinder rod and the outer sleeve.

[0013] 2. Since the labyrinth seal sleeve is designed to be serrated to increase the sealing pressure ratio, the error and wear caused by the ambient temperature are compensated by the spring, and the leakage of the gas in the cylinder can be prevented, ensuring the stability of the movement under the cylinder working condition. The piston pad is positioned by the threaded rod, and the piston pad is positioned to the bottom end of the cylinder rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0015] Figure 2 It is a schematic diagram of a partial front section structure of the outer sleeve in the utility model.

[0016] Figure 3 It is a schematic diagram of the front section structure of the U-shaped sealing gasket in the utility model.

[0017] Figure 4 It is a schematic diagram of the structure of the labyrinth sealing sleeve in the utility model.

[0018] Figure 5 It is a schematic diagram of the connection structure between the cylinder rod and the piston pad in the utility model.

[0019] in:

[0020] 1. Outer sleeve; 2. Air outlet; 3. Air inlet; 4. Flange; 5. Air guide base; 6. Cylinder rod; 7. Annular blade; 8. Labyrinth sealing sleeve; 9. U-shaped sealing gasket; 10. Sealing mechanism; 11. Internal stress hole; 12. Positioning hole; 13. Piston gasket; 14. Threaded rod; 15. Telescopic mechanism. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1 to 5 As shown, the three-layer sealing structure of the piston rod of the clay conveying pump includes an outer sleeve 1, one side of the outer sleeve 1 is penetrated by an air outlet end 2, the bottom end of the outer sleeve 1 is connected to an air guide base 5, and the inner part of the outer sleeve 1 is provided with a sealing mechanism 10, the sealing mechanism 10 seals the gap at the connection between the outer sleeve 1 and the cylinder rod 6 to prevent the external clay from entering the inner part of the outer sleeve 1 during the displacement of the cylinder rod 6, and the inner part of the outer sleeve 1 is provided with a telescopic mechanism 15, the telescopic mechanism 15 performs air pressure telescoping on the bottom end of the cylinder rod 6, and then adjusts and controls the telescopic size of the cylinder rod 6.

[0023] In this embodiment, the sealing mechanism 10 includes an outer sleeve 1, an air guide base 5, an annular blade 7 and a positioning hole 12. The bottom end of the outer sleeve 1 is provided with an air guide base 5, and the top of the air guide base 5 is provided with an outer sleeve 1. The outer side of the cylinder rod 6 is connected with a labyrinth sealing sleeve 8, and a U-shaped sealing gasket 9 is provided directly below the labyrinth sealing sleeve 8. An annular blade 7 is provided directly above the U-shaped sealing gasket 9. The annular blade 7 is arranged inside the outer sleeve 1, and an internal stress hole 11 is opened inside the U-shaped sealing gasket 9. The structural strength of the U-shaped sealing gasket 9 is increased by the internal stress hole 11 to avoid deformation of the U-shaped sealing gasket 9.

[0024] In this embodiment, the labyrinth sealing sleeve 8 is connected to the inner end of the cylinder rod 6 through a positioning hole 12 opened through the top, the bottom end of the annular blade 7 is supported by the labyrinth sealing sleeve 8, and the cylinder rod 6 is sealed by hard and flexible materials.

[0025] In this embodiment, the telescopic mechanism 15 includes an outer sleeve 1, an air guide base 5, a cylinder rod 6, a piston pad 13 and a threaded rod 14. An air inlet end 3 is opened through one side of the air guide base 5, and a piston pad 13 is arranged inside the air guide base 5. A threaded rod 14 is arranged at the top of the piston pad 13, and the outer side of the threaded rod 14 is connected to the cylinder rod 6. The top of the piston pad 13 is positioned by the threaded rod 14, which facilitates the disassembly and replacement of the piston pad 13.

[0026] In this embodiment, the cylinder rod 6 is connected to the inside of the outer sleeve 1 through a piston pad 13 arranged at the bottom end. The bottom end of the cylinder rod 6 is pushed by the piston pad 13, and the tail end of the cylinder rod 6 is pushed to be extended and retracted.

[0027] In this embodiment, a flange 4 is connected directly above the outer sleeve 1 , and the flange 4 is used to position the external device and control the cylinder rod 6 .

[0028] The three-layer sealing structure of the piston rod of the clay delivery pump includes the following work contents in practical application:

[0029] Step 1: The operator first aligns the bottom end of the cylinder rod 6 with the piston pad 13, connects the threaded rod 14 at the top of the piston pad 13 with the bottom end of the cylinder rod 6, fills the piston pad 13 into the inside of the outer sleeve 1, and lubricates the surface of the piston pad 13 by filling lubricating oil to reduce the friction of the cylinder rod 6 during the lifting process, and seals the top of the outer sleeve 1 through the flange 4, and locks the flange 4 and the top of the outer sleeve 1 with bolts;

[0030] Step 2: The operator can nest the U-shaped sealing gasket 9 on the outside of the cylinder rod 6, and then connect the positioning hole 12 opened on the top of the labyrinth sealing sleeve 8 with the cylinder rod 6, and connect the outside of the cylinder rod 6 through the annular blade 7, and lift the bottom end of the annular blade 7 through the labyrinth sealing sleeve 8 to prevent the annular blade 7 from being displaced during the vertical lifting of the cylinder rod 6;

[0031] Step 3: When the cylinder rod 6 moves, the cylinder rod 6 moves in the labyrinth sealing sleeve 8 and the U-shaped sealing gasket 9, and oil can be applied to the surface of the cylinder rod 6 to lubricate the surface of the cylinder rod 6. The annular blade 7 scrapes away the dirt attached to the outer side of the cylinder rod 6 to prevent dirt or liquid from penetrating into the inner side of the outer sleeve 1, thereby reducing the wear of the surface of the cylinder rod 6 and the oil seal;

[0032] Step 4: The operator can inject pressurized gas directly into the interior of the outer sleeve 1 through the air inlet end 3, inject pressurized gas into the interior of the outer sleeve 1, push the bottom end of the piston pad 13, use the piston pad 13 to push the bottom end of the cylinder rod 6, adjust the expanded size of the cylinder rod 6, and release the output gas through the air outlet end 2 set on one side, so that the cylinder rod 6 returns to the interior of the outer sleeve 1.

[0033] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. The three-layer sealing structure of the piston rod of the clay delivery pump is characterized by: The invention comprises an outer sleeve (1), one side of the outer sleeve (1) is provided with an air outlet (2), the bottom end of the outer sleeve (1) is connected to an air guide base (5), a sealing mechanism (10) is arranged inside the outer sleeve (1), the sealing mechanism (10) seals the gap at the connection between the outer sleeve (1) and the cylinder rod (6), so as to prevent clay from entering the inside of the outer sleeve (1) along the displacement process of the cylinder rod (6), and a telescopic mechanism (15) is arranged inside the outer sleeve (1), the telescopic mechanism (15) performs air pressure telescoping on the bottom end of the cylinder rod (6), thereby adjusting and controlling the telescopic size of the cylinder rod (6).

2. The three-layer sealing structure of the piston rod of the clay delivery pump according to claim 1 is characterized in that: The sealing mechanism (10) comprises an outer sleeve (1), an air guide base (5), an annular blade (7) and a positioning hole (12); the bottom end of the outer sleeve (1) is provided with the air guide base (5); the top end of the air guide base (5) is provided with the outer sleeve (1); the outer side of the cylinder rod (6) is connected with a labyrinth sealing sleeve (8); a U-shaped sealing gasket (9) is provided directly below the labyrinth sealing sleeve (8); an annular blade (7) is provided directly above the U-shaped sealing gasket (9); the annular blade (7) is provided inside the outer sleeve (1); and an internal stress hole (11) is provided inside the U-shaped sealing gasket (9).

3. The three-layer sealing structure of the piston rod of the clay delivery pump according to claim 2 is characterized in that: The labyrinth sealing sleeve (8) is connected to the inner end of the cylinder rod (6) via a positioning hole (12) penetrating through the top end.

4. The three-layer sealing structure of the piston rod of the clay delivery pump according to claim 1 is characterized in that: The telescopic mechanism (15) comprises an outer sleeve (1), an air guide base (5), a cylinder rod (6), a piston pad (13) and a threaded rod (14); an air inlet end (3) is provided through one side of the air guide base (5); a piston pad (13) is provided inside the air guide base (5); a threaded rod (14) is provided at the top end of the piston pad (13); and the outer side of the threaded rod (14) is connected to the cylinder rod (6).

5. The three-layer sealing structure of the piston rod of the clay delivery pump according to claim 4 is characterized in that: The cylinder rod (6) is connected to the interior of the outer sleeve (1) via a piston pad (13) arranged at the bottom end.

6. The three-layer sealing structure of the piston rod of the clay delivery pump according to claim 1 is characterized in that: A flange (4) is connected directly above the outer sleeve (1).

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