Silencing device of screw blower

Abstract

The utility model discloses a noise elimination device for a screw blower, belongs to the technical field of screw blowers, and aims to solve the problems that in the operation process of the screw blower, the flow rate of airflow at an exhaust port is suddenly increased, gas is violently collided and collides with the inner wall of a ventilation pipeline to shake, so that large noise can be generated, and the noise is reduced. The screw air blower comprises a screw air blower body, the surface of one side of the screw air blower body is fixedly connected with an exhaust pipe, the upper end and the lower end of the outer circumferential face of the exhaust pipe are sleeved with silencing sleeves, and silencing cotton is glued to the inner circumferential face of each silencing sleeve; the swinging amplitude of the exhaust pipe can be reduced through the hindering effect of the resilience force of the spring, noise generated when airflow is exhausted at the exhaust pipe can be reduced in cooperation with the silencing cotton, and therefore the application range of the device is widened, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw blowers, and in particular relates to a silencing device for a screw blower. Background Art

[0002] Screw blower is an electromechanical equipment frequently used in industrial production. It mainly relies on a pair of mutually meshing yin and yang spiral rotors to rotate driven by a motor, sucking air from the air inlet end, compressing it, and then discharging it from the exhaust end. There is no lubricating oil in the compression chamber, and the yin and yang rotors are ensured not to contact each other by synchronous gears.

[0003] During the operation of the screw blower in the prior art, the velocity of the air flow at the exhaust port will suddenly increase, the gas itself will collide violently and collide with the inner wall of the ventilation duct to produce shaking, thereby generating a large amount of noise, thereby causing noise impact on the operators and people around them, so that the use of the device has certain limitations and is not conducive to use.

[0004] Therefore, a screw blower silencer is needed to solve the problem in the prior art that during the operation of the screw blower, the flow rate of the air flow at the exhaust port suddenly increases, the gas itself collides violently and collides with the inner wall of the ventilation duct to cause shaking, thereby generating loud noise and causing noise impact on the operators and people around them. Utility Model Content

[0005] The purpose of the utility model is to provide a screw blower silencer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a screw blower silencer, comprising a screw blower body, a surface on one side of the screw blower body fixedly connected with an exhaust pipe, upper and lower ends of the outer circumference of the exhaust pipe are sleeved with silencer sleeves, the inner circumference of the silencer sleeve is glued with silencer cotton, a fixed block is fixed on the surface of one side of the screw blower body at a position at one end of the silencer sleeve, a fixed shaft is fixed on the surface of one end of the fixed block, a movable cylinder is arranged at one end of the fixed shaft, a limiting groove is provided inside the movable cylinder, the fixed shaft and the inner cavity of the limiting groove at the adjacent position are slidingly connected, a spring is sleeved on the outer circumference of the fixed shaft, one end of the spring is fixed to the surface of the adjacent fixed block, and the other end of the spring is fixed to the surface of the adjacent movable cylinder, a thread groove is provided on the surface of the movable cylinder near one end of the exhaust pipe, a first bolt is threadedly connected to the inner thread of the thread groove, a sleeve block is fixedly sleeved on the outer circumference of the first bolt, three slots are provided on the outer circumference of the silencer sleeve, and the bottom of the first bolt extends to the inside of the slot at the adjacent position.

[0007] It should be noted in the solution that a plurality of T-shaped block grooves are evenly opened on the surfaces of both ends of the silencer sleeve, and I-shaped embedded blocks are inserted into the inside of the block grooves at two adjacent positions.

[0008] It is further worth mentioning that a movable shaft is rotatably connected to the surfaces of both ends of one of the exhaust pipes at a position on one side of the block groove, and a sleeve plate is fixedly sleeved on the outer circumference of the movable shaft.

[0009] It should be further explained that a second bolt is threadedly connected through the surface of the sleeve plate, a positioning hole is opened on the surface of one end of the insert, and one end of the second bolt extends to the inside of the positioning hole at an adjacent position.

[0010] As a preferred embodiment, symmetrically distributed positioning grooves are provided at both ends of the bottom surface of one of the silencer sleeves, positioning strips are inserted into the positioning grooves, and the bottom of the positioning strips passes through the adjacent positioning grooves and is fixed to the surface of the other silencer sleeve.

[0011] As a preferred embodiment, the hole diameter at one end of the inner cavity of the limiting groove is larger than the hole diameter at the other end of the inner cavity, and the diameter at one end of the outer circumference of the fixed shaft is larger than the diameter at the other end of the outer circumference.

[0012] Compared with the prior art, the screw blower silencer provided by the utility model has at least the following beneficial effects:

[0013] (1) The exhaust pipe can be wrapped by two silencer sleeves, and the silencer sleeves are shaken by the collision of the airflow with the inner wall of the exhaust pipe, so that the amplitude of the exhaust pipe shaking can be reduced by the hindering effect of the spring rebound force, and the noise generated when the airflow is discharged from the exhaust pipe can be reduced in combination with the silencer cotton, thereby improving the application range of the device and thus improving the practicability of the device.

[0014] (2) After wrapping the outer circumference of the exhaust pipe with two silencer sleeves, inserting the insert block into the cavity formed by the two adjacent block grooves and limiting it with the second bolt, it is convenient for the user to quickly wrap the two silencer sleeves around the exhaust pipe and fix them, and it is also convenient to disassemble the two silencer sleeves, thereby improving the convenience of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model in the front view direction;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of a local structure of the utility model;

[0017] Figure 3 It is a three-dimensional structural cross-sectional schematic diagram of a local structure of the utility model;

[0018] Figure 4 For the utility model Figure 3 A schematic diagram of the structure enlargement at the center A;

[0019] Figure 5 For the utility model Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0020] In the figure: 1. screw blower body; 2. exhaust pipe; 3. silencer sleeve; 4. silencer cotton; 5. positioning groove; 6. positioning strip; 7. fixed block; 8. movable cylinder; 9. limit groove; 10. fixed shaft; 11. spring; 12. thread groove; 13. first bolt; 14. sleeve block; 15. slot; 16. block groove; 17. embedded block; 18. movable shaft; 19. sleeve plate; 20. second bolt; 21. positioning hole. DETAILED DESCRIPTION

[0021] See also Figure 1-5 The utility model provides a screw blower silencer, comprising a screw blower body 1, an exhaust pipe 2 is fixedly connected to the surface of one side of the screw blower body 1, a silencer sleeve 3 is sleeved on the upper and lower ends of the outer circumference of the exhaust pipe 2, and a silencer cotton 4 is glued to the inner circumference of the silencer sleeve 3, a fixed block 7 is fixed to the surface of one side of the screw blower body 1 at one end of the silencer sleeve 3, a fixed shaft 10 is fixed to the surface of one end of the fixed block 7, a movable cylinder 8 is arranged at one end of the fixed shaft 10, a limiting groove 9 is arranged inside the movable cylinder 8, the fixed shaft 10 is slidingly connected to the inner cavity of the limiting groove 9 at the adjacent position, a spring 11 is sleeved on the outer circumference of the fixed shaft 10, one end of the spring 11 is fixed to the surface of the fixed block 7 at the adjacent position, and the spring 11 The other end is fixed to the surface of the movable cylinder 8 at the adjacent position, and a thread groove 12 is provided on the surface of the movable cylinder 8 near one end of the exhaust pipe 2, and the internal thread of the thread groove 12 is connected to a first bolt 13, and a sleeve block 14 is fixed on the outer circumference of the first bolt 13, and three slots 15 are provided on the outer circumference of the silencer sleeve 3, and the bottom of the first bolt 13 extends to the inside of the slots 15 at the adjacent position, and the exhaust pipe 2 can be wrapped by the two silencer sleeves 3, and the silencer sleeve 3 is subjected to the airflow and collides with the inner wall of the exhaust pipe 2 to produce shaking, so that the shaking amplitude of the exhaust pipe 2 can be reduced by the hindering effect of the rebound force of the spring 11, and the noise generated when the airflow is discharged from the exhaust pipe 2 can be reduced in cooperation with the silencer cotton 4, thereby improving the scope of application of the device.

[0022] Further as Figure 3 , Figure 4 and 5As shown, it is worth explaining in detail that a plurality of T-shaped block grooves 16 are evenly provided on the surfaces of both ends of the silencer sleeve 3, and an I-shaped embedded block 17 is inserted into the interior of two adjacent block grooves 16. After the two silencer sleeves 3 fit and wrap the outer peripheral surface of the exhaust pipe 2, the two adjacent block grooves 16 will form an I-shaped opening, and the I-shaped embedded block 17 is inserted into the cavity formed by the two block grooves 16, so as to limit the two silencer sleeves 3, thereby preventing the two silencer sleeves 3 from separating from each other under the interference between the embedded block 17 and the block groove 16.

[0023] Further as Figure 5 As shown, it is worth explaining in detail that the two end surfaces of one of the exhaust pipes 2 are rotatably connected to a movable shaft 18 at a position located on one side of the block groove 16, and a sleeve plate 19 is fixedly sleeved on the outer circumference of the movable shaft 18. A second bolt 20 is threadedly connected to the surface of the sleeve plate 19, and a positioning hole 21 is opened on the surface of one end of the insert 17, and one end of the second bolt 20 extends to the inside of the positioning hole 21 at an adjacent position. The sleeve plate 19 is rotated to the position of one end of the insert 17 at an adjacent position by adjusting the angle of the sleeve plate 19, and then the second bolt 20 is rotated to extend to the inside of the positioning hole 21 at the adjacent position through the cooperation with the threaded structure of the sleeve plate 19 and to interfere with the hole wall of the positioning hole 21, thereby preventing the insert 17 from detaching from the inside of the two block grooves 16.

[0024] Further as Figure 4 As shown, it is worth explaining in detail that symmetrically distributed positioning grooves 5 are opened at the positions of the two ends of the bottom surface of one of the silencer sleeves 3, and positioning strips 6 are inserted into the interior of the positioning grooves 5. The bottom of the positioning strip 6 passes through the positioning grooves 5 at the adjacent position and is fixed to the surface of the other silencer sleeve 3. When the two silencer sleeves 3 wrap the outer peripheral surface of the exhaust pipe 2, the positioning grooves 5 can be extended to the interior of the positioning strips 6 at the adjacent position, thereby playing a positioning role for the two silencer sleeves 3.

[0025] This solution has the following working process: in actual use, when it is necessary to install the silencer structure on the surface of the exhaust pipe 2, first, the two silencer sleeves 3 are placed in contact with the outer circumference of the exhaust pipe 2. After the two silencer sleeves 3 are in contact with and wrap the outer circumference of the exhaust pipe 2, the two adjacent block grooves 16 will form an opening in the shape of an I, and the I-shaped insert 17 is inserted into the cavity formed by the two block grooves 16, so as to limit the two silencer sleeves 3, thereby preventing the two silencer sleeves 3 from separating from each other under the interference between the insert 17 and the block groove 16, and then the second bolt 20 is rotated to extend to the inside of the adjacent positioning hole 21 through the cooperation with the threaded structure of the sleeve plate 19 and interfere with the hole wall of the positioning hole 21, so as to prevent the insert 17 from detaching from the inside of the two block grooves 16, so as to limit the two silencer sleeves 3. It plays a reinforcing role when wrapping the outer circumference of the exhaust pipe 2, and then the first bolt 13 is rotated by holding the sleeve block 14 with a wrench, so that the first bolt 13 can move in the direction close to the silencer sleeve 3 in cooperation with the threaded structure of the thread groove 12 at the adjacent position until one end thereof contacts the inner wall of the hole of the slot 15, and the silencer cotton 4 glued inside the silencer sleeve 3 can weaken the noise generated when the airflow is transported inside the exhaust pipe 2, and when the exhaust pipe 2 shakes under the action of the airflow, it contacts the movable cylinder 8 so that the movable cylinder 8 can contact the spring 11 to deform it, and can limit the movement trajectory of the movable cylinder 8 under the action of the conflict between the inner wall of the limit groove 9 and the fixed shaft 10, so that the shaking amplitude of the exhaust pipe 2 can be reduced under the action of the rebound force of the spring 11, thereby further reducing the noise generated by the airflow in the exhaust pipe 2 and playing a silencing role.

[0026] According to the above working process, it can be known that the exhaust pipe 2 can be wrapped by the two silencer sleeves 3, and the silencer sleeves 3 are subjected to the airflow and collide with the inner wall of the exhaust pipe 2 to produce shaking, so that the amplitude of the exhaust pipe 2 shaking can be reduced by the hindering effect of the rebound force of the spring 11, and the noise generated when the airflow is discharged from the exhaust pipe 2 can be reduced in cooperation with the silencer cotton 4, thereby improving the scope of application of the device, thereby improving the practicality of the device, by wrapping the outer peripheral surface of the exhaust pipe 2 with the two silencer sleeves 3, and then inserting the embedded block 17 into the cavity formed by the two adjacent position block grooves 16 and limiting it with the second bolt 20, so that it is convenient for the user to quickly wrap the two silencer sleeves 3 around the exhaust pipe 2 and fix them, and it is also convenient to disassemble the two silencer sleeves 3, thereby improving the convenience of use of the device.

[0027] Further as Figure 4As shown, it is worth explaining in detail that the hole diameter at one end of the inner cavity of the limiting groove 9 is larger than the hole diameter at the other end of the inner cavity, and the diameter at one end of the outer circumference of the fixed shaft 10 is larger than the other end of the outer circumference. Due to the shape setting of the inner cavity of the limiting groove 9 and the fixed shaft 10, the fixed shaft 10 can be prevented from detaching from the inside of the movable cylinder 8 at the adjacent position under the interference between the surface of the limiting groove 9 at one end close to the exhaust pipe 2 and the position of the inner cavity of the limiting groove 9 away from the end of the exhaust pipe 2, thereby improving the stability of the device.

[0028] In summary: the exhaust pipe 2 can be wrapped by two silencer sleeves 3, and the silencer sleeve 3 is subjected to the airflow and collides with the inner wall of the exhaust pipe 2 to produce shaking, so that the amplitude of the shaking of the exhaust pipe 2 can be reduced by the hindering effect of the rebound force of the spring 11, and the noise generated when the exhaust pipe 2 discharges the airflow can be reduced in cooperation with the silencer cotton 4, thereby improving the scope of application of the device, thereby improving the practicality of the device, by wrapping the outer peripheral surface of the exhaust pipe 2 with the two silencer sleeves 3, inserting the insert block 17 into the cavity formed by the two adjacent block grooves 16 and limiting it with the second bolt 20, so that it is convenient for the user to quickly wrap the two silencer sleeves 3 around the exhaust pipe 2 and fix it, and thus it is also convenient to disassemble the two silencer sleeves 3, thereby improving the convenience of use of the device, due to the shape setting of the inner cavity of the limiting groove 9 and the fixed shaft 10, it is possible to prevent the fixed shaft 10 from detaching from the inside of the adjacent movable cylinder 8 under the interference between the limiting groove 9 close to the surface of one end of the exhaust pipe 2 and the inner cavity of the limiting groove 9 away from the position of the end of the exhaust pipe 2, thereby improving the stability of use of the device.

Claims

1. A screw blower silencer, comprising a screw blower body (1), characterized in that: An exhaust pipe (2) is fixedly connected to the surface of one side of the screw blower body (1); silencer sleeves (3) are sleeved on the upper and lower ends of the outer circumference of the exhaust pipe (2); silencer cotton (4) is glued to the inner circumference of the silencer sleeve (3); a fixed block (7) is fixed to the surface of one side of the screw blower body (1) at the position of one end of the silencer sleeve (3); a fixed shaft (10) is fixed to the surface of one end of the fixed block (7); a movable cylinder (8) is arranged at one end of the fixed shaft (10); a limiting groove (9) is provided inside the movable cylinder (8); the fixed shaft (10) and the inner cavity of the limiting groove (9) at the adjacent position are slidably connected. The outer circumference of the fixed shaft (10) is sleeved with a spring (11), one end of the spring (11) is fixed to the surface of a fixed block (7) at an adjacent position, and the other end of the spring (11) is fixed to the surface of a movable cylinder (8) at an adjacent position. A thread groove (12) is provided on the surface of the movable cylinder (8) near one end of the exhaust pipe (2), and a first bolt (13) is connected to the internal thread of the thread groove (12). A sleeve block (14) is fixedly sleeved on the outer circumference of the first bolt (13), and three slots (15) are provided on the outer circumference of the silencer sleeve (3), and the bottom of the first bolt (13) extends to the inside of the slot (15) at the adjacent position.

2. A screw blower silencer according to claim 1, characterized in that: The surfaces of both ends of the silencer sleeve (3) are evenly provided with a plurality of T-shaped block grooves (16), and insert blocks (17) arranged in an I-shape are inserted into the interiors of the block grooves (16) at two adjacent positions.

3. A screw blower silencer according to claim 2, characterized in that: A movable shaft (18) is rotatably connected to the surfaces of both ends of one of the exhaust pipes (2) at a position on one side of the block groove (16), and a sleeve plate (19) is fixedly sleeved on the outer peripheral surface of the movable shaft (18).

4. A screw blower silencer according to claim 3, characterized in that: A second bolt (20) is threadedly connected through the surface of the sleeve plate (19), a positioning hole (21) is opened on the surface of one end of the insert block (17), and one end of the second bolt (20) extends to the inside of the adjacent positioning hole (21).

5. The screw blower silencer according to claim 1, characterized in that: Positioning grooves (5) are symmetrically distributed at both ends of the bottom surface of one of the silencer sleeves (3), and positioning strips (6) are inserted into the interior of the positioning grooves (5). The bottom of the positioning strip (6) passes through the adjacent positioning groove (5) and is fixed to the surface of the other silencer sleeve (3).

6. A screw blower silencer according to claim 1, characterized in that: The diameter of the hole at one end of the inner cavity of the limiting groove (9) is larger than the diameter of the hole at the other end of the inner cavity, and the diameter of one end of the outer circumference of the fixed shaft (10) is larger than the diameter of the other end of the outer circumference.

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