Leak-proof roots vacuum pump

Abstract

The utility model discloses a leakproof Roots vacuum pump which comprises a main body, an oil cup is arranged at the upper left corner of the main body, a mounting seat is arranged at the oil cup of the main body, a protective cover is movably arranged above the mounting seat, a base is arranged in the mounting seat, and a round hole penetrating through the outer wall is formed in the middle of the base. The oil cup is sleeved with the protection cover, the bent block is inserted into the arc-shaped hole, the transverse block enters the arc-shaped hole and presses the protection cover downwards, the spring deforms, the annular piece moves downwards, after the transverse block moves to the position below the annular cover, the protection cover is properly rotated, and when the vertical block abuts against the inner wall of the arc-shaped hole, rotation of the protection cover is stopped; the protection cover moves upwards under the action of the spring, the limiting block is clamped into the groove to achieve installation of the protection cover, the oil cup is protected through the protection cover, oil leakage caused by damage to the oil cup is avoided, and the condition that the condition that shaft seal failure is judged through the oil level in the oil cup is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of Roots vacuum pumps, in particular to a leakage-proof Roots vacuum pump. Background Art

[0002] Roots vacuum pump, referred to as Roots pump, refers to a variable displacement vacuum pump with two blade-shaped rotors rotating synchronously in opposite directions, with a small gap between the rotors and between the rotors and the inner wall of the pump casing, and without contact with each other. It relies on the pushing action of a pair of blade-shaped rotors rotating synchronously and in opposite directions in the pump cavity to move gas and realize vacuum pumping. Roots vacuum pump has been tested for long-term operation in devices such as petroleum, chemical industry, plastics, pesticides, dynamic balancing of steam turbine rotors, and aerospace space simulation, so it should be vigorously promoted and applied in China. It is also widely used in industries such as petroleum, chemical industry, metallurgy, and textiles. By observing whether the oil level in the oil cup of the Roots vacuum pump drops, it can be identified whether there is a sign of shaft seal failure.

[0003] However, the oil cup of the current Roots vacuum pump is generally made of plastic. The oil cup is installed vertically on one side of the vacuum pump, and there is no protective device installed on it. As a result, the vacuum pump may be damaged by foreign objects during use, causing internal oil leakage, which affects the sign of shaft seal failure determined by the oil level in the oil cup. Utility Model Content

[0004] The utility model aims to provide a leakage-proof Roots vacuum pump to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a leakage-proof Roots vacuum pump, comprising a main body, an oil cup is installed in the upper left corner of the main body, a mounting seat is provided on the main body where the oil cup is located, a protective cover is movably installed above the mounting seat, a base is provided in the mounting seat, a circular hole penetrating the outer wall is provided in the middle of the base, and an annular groove recessed inwardly is provided on the inner side of the base, a guide groove is provided at the edge of the outer wall above the base, a cylinder is installed at the bottom of the annular groove, an annular sheet is movably installed in the annular groove, a spring is installed on the bottom outer wall of the annular sheet, an annular cover is installed above the base, an arc hole is provided on the outer wall of the annular cover, a guide column is installed at the edge of the outer wall of the lower side of the annular cover, a limiting block is installed on the inner side of the outer wall below the annular cover, a penetration is provided at the bottom of the protective cover, a bending block is installed at the bottom edge of the protective cover, a vertical block and a horizontal block are provided in the bending block, and a groove is provided on the horizontal block.

[0006] Preferably, the oil cup is inserted into the mounting seat, the size of the oil cup is smaller than the round hole, and the protective cover is located outside the oil cup.

[0007] Preferably, the oil cup is smaller than the penetration point, and the penetration point and the circular hole have the same diameter.

[0008] Preferably, the cylinder is fixedly installed in the annular groove, and the height of the cylinder is lower than the annular groove.

[0009] Preferably, the size of the annular sheet is smaller than the annular groove, and one end of the spring is fixedly connected to the annular sheet, and the other end of the spring is sleeved on the outside of the cylinder.

[0010] Preferably, the mounting seat and the annular cover have the same size, the guide column has a smaller size than the guide groove, and the positions and numbers of the guide column and the guide groove correspond to each other.

[0011] Preferably, the limiting block is directly facing the location of the annular groove, and the annular sheet is located between the limiting block and the circular hole.

[0012] Preferably, the vertical block and the horizontal block are installed vertically, and the outer contour of the horizontal block is arc-shaped. The size of the groove is larger than the limiting block, and the horizontal block is inserted into the arc-shaped hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model installs the oil cup on the vacuum pump, sleeves the protective cover on the outside of the oil cup, inserts the bent block at the bottom of the protective cover into the arc hole, and the horizontal block enters the arc hole to press the protective cover downward, so that the spring deforms and compresses the annular piece to move downward. When the horizontal block moves to the bottom of the annular cover, the protective cover is rotated appropriately to allow the vertical block to move along the arc hole. When the vertical block abuts against the inner wall of the arc hole, the rotation of the protective cover is stopped. Under the action of the spring, the protective cover moves upward, so that the limit block is stuck in the groove to realize the installation of the protective cover. The protective cover protects the oil cup, avoids oil leakage caused by damage to the oil cup, and avoids affecting the signs of shaft seal failure judged by the oil level in the oil cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an exploded schematic diagram of the mounting seat in the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the arc-shaped hole in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the protective cover in the utility model;

[0019] Figure 5 It is a structural schematic diagram of the bending block in the utility model.

[0020] In the figure: 1. main body; 11. oil cup; 2. mounting seat; 3. protective cover; 31. penetration point; 32. bending block; 4. base; 41. round hole; 42. annular groove; 43. guide groove; 44. cylinder; 5. annular sheet; 51. spring; 6. annular cover; 61. arc hole; 62. guide column; 63. limit block; 7. vertical block; 71. horizontal block; 72. groove. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-5 The utility model provides a technical solution: a leak-proof Roots vacuum pump, comprising a main body 1, an oil cup 11 is installed at the upper left corner of the main body 1, a mounting seat 2 is provided at the location of the oil cup 11 of the main body 1, a protective cover 3 is movably installed above the mounting seat 2, a base 4 is provided in the mounting seat 2, a circular hole 41 penetrating the outer wall is provided in the middle of the base 4, and an annular groove 42 concave inwardly is provided on the inner side of the base 4, a guide groove 43 is provided at the edge of the outer wall above the base 4, a cylinder 44 is installed at the bottom of the annular groove 42, and the An annular sheet 5 is movably installed in the annular groove 42, and a spring 51 is installed on the bottom outer wall of the annular sheet 5. An annular cover 6 is installed above the base 4, and an arc hole 61 is provided on the outer wall of the annular cover 6. At the same time, a guide column 62 is installed at the edge of the lower outer wall of the annular cover 6, and a limiting block 63 is installed on the inner side of the lower outer wall of the annular cover 6. A penetration point 31 is provided at the bottom of the protective cover 3, and a bending block 32 is installed at the bottom edge of the protective cover 3. A vertical block 7 and a horizontal block 71 are provided in the bending block 32, and a groove 72 is provided on the horizontal block 71.

[0023] The oil cup 11 is inserted into the mounting seat 2, the size of the oil cup 11 is smaller than the circular hole 41, and the protective cover 3 is located outside the oil cup 11. The number and position of the guide column 62 and the spring 51 correspond, and the number and position of the arc hole 61 and the bending block 32 correspond.

[0024] The oil cup 11 is smaller than the through-hole 31 , and the through-hole 31 and the circular hole 41 have the same diameter.

[0025] The cylinder 44 is fixedly installed in the annular groove 42 , and the height of the cylinder 44 is lower than the annular groove 42 .

[0026] The size of the annular sheet 5 is smaller than the annular groove 42 . Meanwhile, one end of the spring 51 is fixedly connected to the annular sheet 5 , and the other end of the spring 51 is sleeved on the outside of the cylinder 44 .

[0027] The mounting seat 2 and the annular cover 6 have the same size, the guide column 62 has a smaller size than the guide groove 43 , and the positions and quantities of the guide column 62 and the guide groove 43 correspond to each other.

[0028] The limiting block 63 is directly facing the location of the annular groove 42 , and the annular sheet 5 is located between the limiting block 63 and the circular hole 41 .

[0029] The vertical block 7 and the horizontal block 71 are installed vertically, and the outer contour of the horizontal block 71 is arc-shaped. The size of the groove 72 is larger than the limit block 63, and the horizontal block 71 is inserted into the arc-shaped hole 61. The arc-shaped horizontal block 71 allows it to move normally along the annular groove 42 when the protective cover 3 rotates. At the same time, when the vertical block 7 abuts against the inner wall of the arc-shaped hole 61, the limit block 63 is stuck in the groove 72.

[0030] Working principle: When the utility model is used, the bottom of the spring 51 is sleeved on the outside of the cylinder 44, so that the annular sheet 5 is installed in the annular groove 42. At this time, the distance between the annular sheet 5 and the upper edge of the annular groove 42 is small, and then the guide column 62 at the bottom of the annular cover 6 is aligned with the guide groove 43 and inserted into it, and then the oil cup 11 is installed normally on the main body 1, and then the penetration 31 of the protective cover 3 is aligned with the oil cup 11, and it is installed on the outside of the oil cup 11 from top to bottom. When the bending block 32 at the bottom of the protective cover 3 and the annular cover 6 are in contact, , properly rotate the protective cover 3 to allow the bending block 32 to move to the location of the arc hole 61, and then press the protective cover 3 downward appropriately, the internal spring 51 deforms and compresses the annular sheet 5 to move downward, and when the horizontal block 71 moves to the lower side of the annular cover 6, the rotating protective cover 3 allows the vertical block 7 to move along the arc hole 61. When the vertical block 7 presses against the inner wall of the arc hole 61, stop pressing and rotating the protective cover 3, and push the annular sheet 5 upward under the action of the spring 51. The annular sheet 5 presses against the protective cover 3 upward, so that the limit block 63 is stuck in the groove 72, and the installation of the protective cover 3 is completed.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] 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-proof Roots vacuum pump, comprising a main body (1), characterized in that: An oil cup (11) is installed at the upper left corner of the main body (1), and a mounting seat (2) is provided on the main body (1) where the oil cup (11) is located. A protective cover (3) is movably installed above the mounting seat (2). A base (4) is provided in the mounting seat (2), and a circular hole (41) penetrating the outer wall is provided in the middle of the base (4). An inwardly recessed annular groove (42) is provided on the inner side of the base (4). A guide groove (43) is provided at the edge of the outer wall above the base (4). A cylinder (44) is installed at the bottom of the annular groove (42), and an annular sheet (5) is movably installed in the annular groove (42). A spring (51) is installed on the bottom outer wall of the annular sheet (5); an annular cover (6) is installed above the base (4); an arc-shaped hole (61) is provided on the outer wall of the annular cover (6); a guide column (62) is installed at the edge of the lower outer wall of the annular cover (6); a limit block (63) is installed on the inner side of the lower outer wall of the annular cover (6); a through portion (31) is provided at the bottom of the protective cover (3); a bending block (32) is installed at the bottom edge of the protective cover (3); a vertical block (7) and a horizontal block (71) are provided in the bending block (32); and a groove (72) is provided on the horizontal block (71).

2. The anti-leakage Roots vacuum pump according to claim 1, characterized in that: The oil cup (11) is inserted into the mounting seat (2), the size of the oil cup (11) is smaller than the circular hole (41), and the protective cover (3) is located outside the oil cup (11).

3. The anti-leakage Roots vacuum pump according to claim 2, characterized in that: The size of the oil cup (11) is smaller than the penetration point (31), and the diameters of the penetration point (31) and the circular hole (41) are the same.

4. The anti-leakage Roots vacuum pump according to claim 3, characterized in that: The cylindrical body (44) is fixedly installed in the annular groove (42), and the height of the cylindrical body (44) is lower than that of the annular groove (42).

5. The anti-leakage Roots vacuum pump according to claim 4, characterized in that: The size of the annular plate (5) is smaller than the annular groove (42), and one end of the spring (51) is fixedly connected to the annular plate (5), and the other end of the spring (51) is sleeved on the outside of the cylinder (44).

6. The anti-leakage Roots vacuum pump according to claim 5, characterized in that: The mounting seat (2) and the annular cover (6) have the same size, the guide column (62) has a smaller size than the guide groove (43), and the positions and quantities of the guide column (62) and the guide groove (43) correspond.

7. The anti-leakage Roots vacuum pump according to claim 6, characterized in that: The limiting block (63) is oriented directly toward the location of the annular groove (42), and the annular sheet (5) is located between the limiting block (63) and the circular hole (41).

8. The anti-leakage Roots vacuum pump according to claim 7, characterized in that: The vertical block (7) and the horizontal block (71) are vertically installed, and the outer contour of the horizontal block (71) is arc-shaped. The size of the groove (72) is larger than the limit block (63), and the horizontal block (71) is inserted into the arc-shaped hole (61).

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