Sealing device of gas compressor

Abstract

The utility model discloses a sealing device of a gas compressor, which comprises a sealing cover detachably mounted on a cylinder of the gas compressor, a piston rod is movably connected onto the cylinder, one end of the piston rod movably penetrates out of one end of the sealing cover, and a first sealing component and a second sealing component are mounted inside the sealing cover. The first sealing component and the second sealing component are both connected with the piston rod. The use effect of the first sealing ring can be improved through the left conical sealing ferrule and the right conical sealing ferrule, secondary sealing is formed on the left side and the right side of the first sealing ring, when the piston rod stretches out and draws back, the piston rod can drive the sealing cover to movably turn over leftwards and rightwards, the joint of the piston rod and the second sealing ring is in a fixed state, abrasion and air leakage are avoided, and the service life is prolonged. And through cooperative use of the first sealing ring and the movable cover, the service life of the sealing device is prolonged on the premise that the sealing effect of the gas compressor is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas compressor equipment, and in particular relates to a sealing device for a gas compressor. Background Art

[0002] A gas compressor is a power device that converts mechanical energy into gas pressure energy and is often used to provide gas power for pneumatic tools.

[0003] The patent with publication number CN213088192U discloses a sealing device for a gas compressor, including a cylinder, a piston rod movably connected in the middle of the cylinder, a base is arranged on the top of the cylinder, bolts are arranged on both sides of the base, a sealing ring 1 is arranged at the bottom of the bolt, a shell is fixedly connected to the top of the base, a fixed block is fixedly connected in the middle of the piston rod, a spring is fixedly connected at the bottom of the fixed block, a clamping ring is fixedly connected at the bottom of the spring, an air pressure tube is slidably connected on both sides of the fixed block, an air outlet is opened on the top of the air pressure tube near the piston rod, a ferrule is movably connected to the inner side of the air outlet, a sealing ring 2 is arranged on the inner side of the ferrule, a top cover is fixedly connected to the top of the shell, a pressure plate is arranged on the top of the top cover, positioning piles are arranged on both sides of the pressure plate, nuts are arranged on the top of the positioning piles, U-shaped rods are arranged on both sides of the fixed block, and one side of the U-shaped rod passes through the inner wall of the air pressure tube and is fixedly connected to the piston.

[0004] The above-mentioned sealing device is sealed only by the sealing ring 2, and the friction between the piston and the sealing ring 2 is inevitable. Long-term use will cause a gap leakage between the piston and the sealing ring 2, thereby reducing the sealing performance. At this time, the sealing ring 2 needs to be replaced, which is relatively complicated. Utility Model Content

[0005] The utility model aims to provide a sealing device for a gas compressor to solve the technical defect that the existing sealing device is sealed only by the second sealing ring during use, and the friction between the piston and the second sealing ring is prone to cause gap leakage after long-term use, resulting in low sealing.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing device for a gas compressor, comprising a sealing cover detachably mounted on a gas compressor cylinder, a piston rod movably connected to the cylinder, one end of the piston rod movably extending out from one end of the sealing cover, a first sealing component and a second sealing component being mounted inside the sealing cover, and both the first sealing component and the second sealing component being connected to the piston rod.

[0007] As a further solution of the utility model, a groove is provided on the cylinder, the cover edge of the sealing cover is clamped in the inside of the groove, a sealing gasket is installed between the groove and the cover edge of the sealing cover, and the cover edge of the sealing cover is fixedly connected to the cylinder by bolts.

[0008] As a further solution of the utility model, the first sealing component includes a first fixing ring fixedly mounted on the inner wall of the sealing cover, a first sealing ring being fixedly mounted in the inner ring of the first fixing ring, the piston rod being movably inserted into the interior of the first sealing ring, and conical sealing rings being integrally formed at the left and right ends of the first sealing ring, respectively, and the narrower end of the conical sealing ring being movably sleeved on the piston rod.

[0009] As a preferred solution of the utility model, a circular pressing edge is integrally formed at the contact portion between the conical sealing ring and the piston rod, and the circular pressing edge is seal-crimped on the piston rod.

[0010] As a preferred solution of the utility model, the second sealing component includes a second fixed ring fixedly mounted on the inner wall of the sealing cover, a movable cover is installed in the inner ring of the second fixed ring, a second sealing ring is fixedly mounted at one end of the movable cover, the piston rod is fixedly mounted in the inner ring of the second sealing ring, and the piston rod passes through the interior of the movable cover.

[0011] As a further preferred solution of the utility model, a slot is provided on the inner wall of the second fixed ring, and the cover edge of the movable cover is fixedly inserted in the slot.

[0012] As a further preferred solution of the utility model, the sealing pad, the first sealing ring, the movable cover and the second sealing ring are all rubber structures.

[0013] Compared with the prior art, the sealing device of a gas compressor provided by the utility model has the following beneficial effects:

[0014] 1. The utility model can seal the piston movement of the piston rod through the first sealing ring, and the left and right two conical sealing rings can increase the use effect of the first sealing ring. Through the elastic advantage of the left and right two conical sealing rings themselves, the conical sealing rings can effectively fit and seal with the piston rod, forming a secondary seal on the left and right sides of the first sealing ring. When the piston rod is extended and retracted, the piston rod can drive the sealing cover to move and turn over left and right, which does not affect the normal extension and retraction of the piston rod when sealing, and the connection between the piston rod and the second sealing ring is in a fixed state, and no wear and leakage will occur. Through the coordinated use of the first sealing ring and the movable cover, the service life of the sealing device is improved while further improving the sealing effect of the gas compressor.

[0015] 2. The utility model can effectively press on the piston rod through the circular pressing edge. In addition, the setting of the circular pressing edge facilitates the smooth output of the piston rod.

[0016] 2. The utility model installs the sealing cover and the cylinder by bolts, which is convenient for disassembly, assembly, inspection and maintenance of the sealing cover. The groove and the sealing gasket further increase the sealing performance of the connection between the sealing cover and the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only examples of the embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic cross-sectional view of the sealing cover in the embodiment of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0020] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle.

[0021] Reference numerals:

[0022] 1. Cylinder; 11. Piston rod; 2. Sealing cover; 21. Bolt; 22. Sealing gasket; 3. First fixing ring; 4. First sealing ring; 41. Conical sealing ring; 42. Circular pressure edge; 5. Second fixing ring; 51. Slot; 6. Movable cover; 7. Second sealing ring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0026] Embodiment 1:

[0027] See attached Figure 1-Figure 3 As shown, an embodiment of the utility model is a sealing device for a gas compressor, comprising a sealing cover 2 detachably mounted on a gas compressor cylinder 1, a piston rod 11 movably connected to the cylinder 1, one end of the piston rod 11 movably passes through one end of the sealing cover 2, a first sealing component and a second sealing component are installed inside the sealing cover 2, and both the first sealing component and the second sealing component are connected to the piston rod 11.

[0028] The coordinated use of the first sealing ring 4 and the movable cover 6 further improves the sealing effect of the gas compressor, thereby increasing the service life of the sealing device and reducing maintenance and overhaul.

[0029] Embodiment 2:

[0030] See attached Figure 1-Figure 3 As shown, an improved solution is provided based on the first embodiment:

[0031] A groove is provided on the cylinder 1 , and the cover edge of the sealing cover 2 is clamped in the groove. A sealing gasket 22 is installed between the groove and the cover edge of the sealing cover 2 . The cover edge of the sealing cover 2 is fixedly connected to the cylinder 1 by bolts 21 .

[0032] The bolts 21 are used to install the sealing cover 2 and the cylinder 1 , which facilitates the disassembly, assembly, inspection and maintenance of the sealing cover 2 . The grooves and the sealing gaskets 22 further increase the sealing performance of the connection between the sealing cover 2 and the cylinder 1 .

[0033] The first sealing component includes a first fixing ring 3 fixedly mounted on the inner wall of the sealing cover 2, a first sealing ring 4 is fixedly mounted in the inner ring of the first fixing ring 3, the piston rod 11 is movably inserted into the interior of the first sealing ring 4, and a conical sealing ring 41 is integrally formed at the left and right ends of the first sealing ring 4, and the narrower end of the conical sealing ring 41 is movably sleeved on the piston rod 11.

[0034] The two left and right conical sealing rings 41 can increase the use effect of the first sealing ring 4. The elastic advantage of the two conical sealing rings 41 themselves enables the conical sealing rings 41 to effectively fit and seal with the piston rod 11, forming a secondary seal on the left and right sides of the first sealing ring 4.

[0035] The contact part between the conical sealing ring 41 and the piston rod 11 is integrally formed with a circular pressing edge 42, and the circular pressing edge 42 is sealed and pressed on the piston rod 11. The circular pressing edge 42 can be effectively pressed on the piston rod 11, and at the same time facilitates the smooth output of the piston rod 11.

[0036] The second sealing component includes a second fixed ring 5 fixedly mounted on the inner wall of the sealing cover 2, a movable cover 6 is mounted in the inner ring of the second fixed ring 5, a second sealing ring 7 is fixedly mounted at one end of the movable cover 6, a piston rod 11 is fixedly mounted in the inner ring of the second sealing ring 7, and the piston rod 11 passes through the inside of the movable cover 6.

[0037] The sealing cover 2 is a bowl-shaped structure. When the piston rod 11 is extended or retracted, the sealing cover 2 can be driven to turn over left and right to achieve effective sealing. The connection with the piston rod 11 is not prone to wear and leakage, further improving the sealing effect of the gas compressor.

[0038] A slot 51 is provided on the inner wall of the second fixed ring 5, and the cover edge of the movable cover 6 is fixedly inserted in the slot 51. This improves the sealing performance of the connection between the second fixed ring 5 and the movable cover 6, and increases the stability of the connection.

[0039] The sealing pad 22, the first sealing ring 4, the movable cover 6 and the second sealing ring 7 are all made of rubber, which is convenient for the piston rod 11 to drive the left and right flipping.

[0040] The working principle of the embodiment of the utility model: the first sealing ring 4 can seal the piston movement of the piston rod 11, and the left and right two conical sealing rings 41 can increase the use effect of the first sealing ring 4. The elastic advantage of the left and right two conical sealing rings 41 themselves enables the conical sealing rings 41 to effectively fit and seal with the piston rod 11, forming a secondary seal on the left and right sides of the first sealing ring 4. When the piston rod 11 is extended and retracted, the piston rod 11 can drive the sealing cover 2 to move and turn over left and right, and does not affect the normal extension and retraction of the piston rod 11 when sealing, and the connection between the piston rod 11 and the second sealing ring 7 is in a fixed state, and no wear and leakage will occur. When the first sealing ring 4 is worn, the movable cover 6 can also provide a sealing effect, thereby increasing the service life of the sealing device. The coordinated use of the first sealing ring 4 and the movable cover 6 increases the service life of the sealing device while further improving the sealing effect of the gas compressor.

[0041] The above shows and describes the basic principles of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only intended to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing device for a gas compressor, characterized in that: The invention comprises a sealing cover (2) which is detachably mounted on a gas compressor cylinder (1); a piston rod (11) is movably connected to the cylinder (1); one end of the piston rod (11) movably passes through one end of the sealing cover (2); a first sealing component and a second sealing component are mounted inside the sealing cover (2); the first sealing component and the second sealing component are both connected to the piston rod (11); The cylinder (1) is provided with a groove, the cover edge of the sealing cover (2) is clamped inside the groove, a sealing gasket (22) is installed between the groove and the cover edge of the sealing cover (2), and the cover edge of the sealing cover (2) is fixedly connected to the cylinder (1) by bolts (21); The first sealing component comprises a first fixing ring (3) fixedly mounted on the inner wall of the sealing cover (2), a first sealing ring (4) fixedly mounted in the inner ring of the first fixing ring (3), the piston rod (11) movably inserted into the interior of the first sealing ring (4), the left and right ends of the first sealing ring (4) are respectively integrally formed with a conical sealing ring (41), and the narrower end of the conical sealing ring (41) is movably sleeved on the piston rod (11); A circular pressing edge (42) is integrally formed at the contact portion between the conical sealing ring (41) and the piston rod (11), and the circular pressing edge (42) is sealingly pressed onto the piston rod (11).

2. A sealing device for a gas compressor according to claim 1, characterized in that: The second sealing component comprises a second fixed ring (5) fixedly mounted on the inner wall of the sealing cover (2); a movable cover (6) is mounted in the inner ring of the second fixed ring (5); a second sealing ring (7) is fixedly mounted at one end of the movable cover (6); the piston rod (11) is fixedly mounted in the inner ring of the second sealing ring (7), and the piston rod (11) passes through the interior of the movable cover (6).

3. A sealing device for a gas compressor according to claim 2, characterized in that: A slot (51) is provided on the inner wall of the second fixed ring (5), and a cover edge of the movable cover (6) is fixedly inserted into the interior of the slot (51).

4. A sealing device for a gas compressor according to claim 3, characterized in that: The sealing pad (22), the first sealing ring (4), the movable cover (6) and the second sealing ring (7) are all rubber structures.

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