Pneumatic regulation and control device for air volume of Roots blower

Abstract

The utility model belongs to the field of mechanical engineering, particularly relates to a pneumatic regulating and controlling device for the air volume of a Roots blower, and aims to solve the problems of complicated structure, high maintenance cost and the like caused by the fact that a mechanical regulating valve and the like are generally adopted to realize the air volume regulation in the prior art, the following scheme is provided: the pneumatic regulating and controlling device comprises a Roots blower main body; the regulation and control assembly is used for regulating the air volume of the Roots blower main body, the regulation and control assembly is arranged at the air outlet end of the Roots blower main body, the regulation and control assembly comprises an outer cylinder and an inner cavity formed in the outer cylinder, and an air inlet pipe and an air outlet pipe which communicate with the inner cavity are arranged at the two ends of the outer cylinder correspondingly; during use, after the nut is rotated to be separated from the circular-truncated-cone-shaped plastic barrel, gas can be filled into the first gas conveying pipe or the second gas conveying pipe according to actual requirements, so that the plugging block is moved to different positions to control the circulation area, finally, the air volume is adjusted, and finally, the nut is rotated back to the original position to fix the plugging block. The structure is simple and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, in particular to a pneumatic control device for the air volume of a Roots blower. Background Technique

[0002] A Roots blower compresses and transports gas by using two three-lobe or two-lobe rotors moving relative to each other in a cylinder. This type of blower has a simple structure and is easy to manufacture, and is widely used in industries such as metallurgy, chemical industry, chemical fertilizer, petrochemical, instrument, and building materials;

[0003] In the traditional regulation of the air volume of a Roots blower, mechanical regulating valves and other methods are usually used to achieve the regulation of the air volume. However, these methods have problems such as complex structure and high maintenance costs. Therefore, a new type of Roots blower air volume control device with a simple structure is needed to reduce costs and facilitate later maintenance and other operations. Content of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages of using mechanical regulating valves and other methods to regulate the air volume in the prior art, such as complex structure and high maintenance costs, and to propose a pneumatic control device for the air volume of a Roots blower.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A pneumatic control device for the air volume of a Roots blower includes a Roots blower main body;

[0007] A control component for regulating the air volume of the Roots blower main body. The control component is arranged at the air outlet end of the Roots blower main body. The control component includes an outer cylinder and an inner cavity opened inside the outer cylinder. The two ends of the outer cylinder are respectively provided with an air inlet pipe and an air outlet pipe communicated with the inner cavity. Flange rings are arranged on both the air inlet pipe and the air outlet pipe of the outer cylinder. A blocking block is arranged inside the inner cavity, and the top inside the inner cavity is in a frustum shape.

[0008] In a possible design, the control component further includes a plurality of first air pipes. A plurality of the first air pipes are all located above the inside of the inner cavity. One ends of the plurality of first air pipes are fixedly penetrated to the outside of the outer cylinder, and a plurality of first circular cavities are opened inside the blocking block. The other ends of the plurality of first air pipes respectively slide through to the inside of the plurality of first circular cavities.

[0009] In a possible design, a first rubber ring is fixedly sleeved on the outer wall of the first air pipe, and the first rubber ring is located inside the first circular cavity.

[0010] In a possible design, the regulating component further includes a plurality of second air pipes, and the plurality of second air pipes are all located below the interior of the inner cavity. One end of each of the plurality of second air pipes is fixedly penetrated to the outside of the outer cylinder. A plurality of second circular cavities are formed inside the plug block, and one end of each of the plurality of second air pipes respectively slides through the inside of the plurality of second circular cavities.

[0011] In a possible design, a second rubber ring is fixedly sleeved on the outer wall of the second air pipe, and the second rubber ring is located inside the second circular cavity.

[0012] In a possible design, the regulating component further includes a fixing rod. One end of the fixing rod is fixedly arranged on the top of the plug block, and the other end of the fixing rod slides through the outside of the outer cylinder. A cylinder is fixedly arranged on the top of the outer cylinder, and a frustum-shaped plastic cylinder is fixedly arranged on the top of the cylinder. Both the cylinder and the frustum-shaped plastic cylinder are sleeved on the outer wall of the fixing rod. Side holes are formed in the outer wall of the frustum-shaped plastic cylinder, and a nut is threadedly sleeved on the outer wall of the cylinder, and the nut is matched with the outer wall of the frustum-shaped plastic cylinder.

[0013] In a possible design, the plurality of second air pipes and the plurality of first air pipes are all arranged in a ring shape, and the plurality of second air pipes and the plurality of first air pipes are arranged in a cross manner.

[0014] In this application, during specific use, both the first air pipe and the second air pipe are connected to corresponding air pumps through pipes. When the air volume needs to be adjusted, first rotate the nut to the outer wall of the cylinder, and then the air pump can be used to inflate the first air pipe or the second air pipe. When inflating into the first air pipe, the gas will enter the inside of the first circular cavity through the first air pipe, thereby pushing the plug block downward, so that the plug block moves away from the frustum end of the inner cavity to increase the flow area and increase the air volume. On the contrary, when inflating into the second air pipe and deflating the first air pipe, the gas inside the second air pipe will enter the inside of the second circular cavity, thereby pushing the plug block upward, so that the plug block approaches the frustum end of the inner cavity to reduce the flow area and reduce the air volume. When the adjustment is completed, rotate the nut in the reverse direction and rotate the nut to the surface of the frustum-shaped plastic cylinder. Since the upper diameter of the frustum-shaped plastic cylinder is larger than the lower diameter, when the nut rotates towards the frustum-shaped plastic cylinder, the frustum-shaped plastic cylinder will be gradually squeezed, thereby clamping and fixing the internal fixing rod, and finally fixing the plug block to ensure stability.

[0015] In the present utility model, for the pneumatic air volume control device of a Roots blower, by means of the first air delivery pipe and the second air delivery pipe of the control assembly, it is possible to control the displacement of the plug block by filling gas into the first air delivery pipe or the second air delivery pipe, thereby moving the plug block to different positions to control the internal flow area of the inner cavity, and finally achieving the effect of air volume control.

[0016] In the present utility model, for the pneumatic air volume control device of a Roots blower, by means of the fixing rod of the control assembly, after the air volume is adjusted by controlling the movement of the plug block, the nut can be rotated to displace, and then the fixing rod can be clamped by the frustum-shaped plastic cylinder, finally fixing the plug block to ensure the stability of the device.

[0017] In the present utility model, during use, first rotate the nut to disengage it from the frustum-shaped plastic cylinder, then fill gas into the first air delivery pipe or the second air delivery pipe according to actual needs, thereby moving the plug block to different positions to control the flow area, and finally achieving the adjustment of the air volume. Finally, rotate the nut back to its original position to fix the plug block. The structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the main structure of a pneumatic air volume control device for a Roots blower proposed by the present utility model;

[0019] Figure 2 is a front view sectional structure schematic diagram of a pneumatic air volume control device for a Roots blower proposed by the present utility model;

[0020] Figure 3 is a side view sectional structure schematic diagram of a pneumatic air volume control device for a Roots blower proposed by the present utility model;

[0021] Figure 4 is a three-dimensional structure schematic diagram of the control assembly of a pneumatic air volume control device for a Roots blower proposed by the present utility model.

[0022] In the figure: 1, Roots blower main body; 2, outer cylinder; 3, flange ring; 4, first air delivery pipe; 5, inner cavity; 6, plug block; 7, first rubber ring; 8, first circular cavity; 9, second air delivery pipe; 10, fixing rod; 11, second circular cavity; 12, second rubber ring; 13, side hole; 14, frustum-shaped plastic cylinder; 15, cylinder; 16, nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Embodiment

[0024] Referring to Figure 1-2 , a pneumatic air volume control device for a Roots blower, which is applied in the field of mechanical engineering, includes: a Roots blower main body 1 and a control component. The Roots blower main body 1 serves as an air source to provide stable air flow. The control component is used to adjust the air volume of the Roots blower main body 1 and is arranged at the air outlet end of the Roots blower main body 1. The control component includes an outer cylinder 2 and an inner cavity 5 opened inside the outer cylinder 2. Both ends of the outer cylinder 2 are respectively provided with an air inlet pipe and an air outlet pipe communicated with the inner cavity 5, and both the air inlet pipe and the air outlet pipe are connected to other pipes or the air outlet end of the Roots blower main body 1 through flange rings 3.

[0025] A blocking block 6 is arranged inside the inner cavity 5 to adjust the flow-through area of the inner cavity 5, thereby realizing the control of the air volume. The top inside the inner cavity 5 is designed as a frustum of a cone, and this design enables the blocking block 6 to uniformly change the flow-through area when moving up and down.

[0026] Furthermore, the control component further includes a plurality of first air pipes 4. The plurality of first air pipes 4 are all located above the inside of the inner cavity 5, and one end of each of them is fixedly penetrated to the outside of the outer cylinder 2 for connecting an external pneumatic control device. A plurality of first circular cavities 8 are opened inside the blocking block 6, and the other ends of the plurality of first air pipes 4 respectively slide through to the inside of the plurality of first circular cavities 8. When the pneumatic control device inflates or exhausts air into the first circular cavities 8 through the first air pipes 4, the blocking block 6 can be pushed to move up and down to realize the control of the air volume.

[0027] In order to enhance the sealing performance between the first air pipes 4 and the blocking block 6, a first rubber ring 7 is fixedly sleeved on the outer wall of the first air pipes 4, and the first rubber ring 7 is located inside the first circular cavities 8. The first rubber ring 7 can prevent gas from leaking through the gap between the first air pipes 4 and the first circular cavities 8, ensuring the stability and accuracy of pneumatic control.

[0028] Referring to Figure 3 , in addition, the control component further includes a plurality of second air pipes 9. The plurality of second air pipes 9 are all located below the inside of the inner cavity 5, and one end of each of them is fixedly penetrated to the outside of the outer cylinder 2, also for connecting an external pneumatic control device. A plurality of second circular cavities 11 are opened inside the blocking block 6, and one ends of the plurality of second air pipes 9 respectively slide through to the inside of the plurality of second circular cavities 11. By inflating or exhausting air into the second circular cavities 11 through the second air pipes 9, the position of the blocking block 6 can be further adjusted to realize a more refined control of the air volume.

[0029] Similarly, in order to enhance the sealing performance between the second gas pipeline 9 and the plugging block 6, a second rubber ring 12 is fixedly sleeved on the outer wall of the second gas pipeline 9, and the second rubber ring 12 is located inside the second circular cavity 11. The second rubber ring 12 can prevent gas from leaking through the gap between the second gas pipeline 9 and the second circular cavity 11, ensuring the stability and accuracy of pneumatic control. Embodiment

[0030] Reference Figure 4 , on the basis of Embodiment 1, an improvement is made: in order to fix the position of the plugging block 6, the regulating assembly further includes a fixing rod 10. One end of the fixing rod 10 is fixedly arranged at the top of the plugging block 6, and the other end slides through to the outside of the outer cylinder 2. A cylinder 15 and a frustum-shaped plastic cylinder 14 are fixedly arranged at the top of the outer cylinder 2, and both the cylinder 15 and the frustum-shaped plastic cylinder 14 are sleeved on the outer wall of the fixing rod 10. Side holes 13 are formed in the outer wall of the frustum-shaped plastic cylinder 14 to cooperate with the deformation of the cylinder 14. A nut 16 is threadedly sleeved on the outer wall of the cylinder 15, and the nut 16 cooperates with the outer wall of the frustum-shaped plastic cylinder 14. By rotating the nut 16, the pressing degree of the nut 16 on the frustum-shaped plastic cylinder 14 can be adjusted, thereby realizing the fixation of the fixing rod 10 and the plugging block 6.

[0031] Specifically, both the first gas pipeline 4 and the second gas pipeline 9 are connected to the corresponding air pumps through pipelines. When the air volume needs to be adjusted, first rotate the nut 16 to the outer wall of the cylinder 15, and then the air pump can be used to inflate the first gas pipeline 4 or the second gas pipeline 9. When inflating into the first gas pipeline 4, the gas will enter the inside of the first circular cavity 8 through the first gas pipeline 4, thereby pushing the plugging block 6 downward, so that the plugging block 6 moves away from the frustum end of the inner cavity 5 to increase the flow area and the air volume. On the contrary, when inflating into the second gas pipeline 9 and deflating the first gas pipeline 4, the gas inside the second gas pipeline 9 will enter the inside of the second circular cavity 11, thereby pushing the plugging block 6 upward, so that the plugging block 6 approaches the frustum end of the inner cavity 5 to reduce the flow area and the air volume. When the adjustment is completed, rotate the nut 16 in the reverse direction and rotate the nut 16 to the surface of the frustum-shaped plastic cylinder 14. Since the upper diameter of the frustum-shaped plastic cylinder 14 is larger than the lower diameter, when the nut 16 rotates towards the frustum-shaped plastic cylinder 14, the frustum-shaped plastic cylinder 14 will be gradually squeezed, thereby clamping and fixing the internal fixing rod 10, and finally fixing the plugging block 6 to ensure stability. The structure is simple and the operation is convenient.

[0032] However, as is well known to those skilled in the art, the working principle and wiring method of the Roots blower main body 1 are common knowledge, and they all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0033] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A pneumatic control device for the air volume of a Roots blower, characterized in that, Including: Roots blower main body (1); A regulating component for regulating the air volume of the Roots blower main body (1), the regulating component is arranged at the air outlet end of the Roots blower main body (1), the regulating component includes an outer cylinder (2) and an inner cavity (5) opened inside the outer cylinder (2), both ends of the outer cylinder (2) are respectively provided with an air inlet pipe and an air outlet pipe communicated with the inner cavity (5), flange rings (3) are arranged on both the air inlet pipe and the air outlet pipe of the outer cylinder (2), a blocking block (6) is arranged inside the inner cavity (5), and the top inside the inner cavity (5) is set to be frustum-shaped.

2. The air volume pneumatic control device of a Roots blower according to claim 1, characterized in that, The regulating component further includes a plurality of first air pipes (4), and a plurality of the first air pipes (4) are all located above the inside of the inner cavity (5), one ends of the plurality of the first air pipes (4) are all fixedly penetrated to the outside of the outer cylinder (2), a plurality of first circular cavities (8) are opened inside the blocking block (6), and the other ends of the plurality of the first air pipes (4) respectively slide and penetrate into the inside of the plurality of first circular cavities (8).

3. The pneumatic air volume control device for a Roots blower according to claim 2, wherein A first rubber ring (7) is fixedly sleeved on the outer wall of the first air pipe (4), and the first rubber ring (7) is located inside the first circular cavity (8).

4. The air volume pneumatic control device of a Roots blower according to claim 3, characterized in that, The regulating component further includes a plurality of second air pipes (9), and a plurality of the second air pipes (9) are all located below the inside of the inner cavity (5), one ends of the plurality of the second air pipes (9) are all fixedly penetrated to the outside of the outer cylinder (2), a plurality of second circular cavities (11) are opened inside the blocking block (6), and one ends of the plurality of the second air pipes (9) respectively slide and penetrate into the inside of the plurality of second circular cavities (11).

5. The air volume pneumatic control device of a Roots blower according to claim 4, characterized in that, A second rubber ring (12) is fixedly sleeved on the outer wall of the second air pipe (9), and the second rubber ring (12) is located inside the second circular cavity (11).

6. The air volume pneumatic control device of a Roots blower according to claim 5, characterized in that The regulating component further includes a fixing rod (10), one end of the fixing rod (10) is fixedly arranged on the top of the blocking block (6), the other end of the fixing rod (10) slides and penetrates to the outside of the outer cylinder (2), a cylinder (15) is fixedly arranged on the top of the outer cylinder (2), a frustum-shaped plastic cylinder (14) is fixedly arranged on the top of the cylinder (15), both the cylinder (15) and the frustum-shaped plastic cylinder (14) are sleeved on the outer wall of the fixing rod (10), side holes (13) are opened on the outer wall of the frustum-shaped plastic cylinder (14), and a nut (16) is threadedly sleeved on the outer wall of the cylinder (15), and the nut (16) is matched with the outer wall of the frustum-shaped plastic cylinder (14).

7. The air volume pneumatic control device of a Roots blower according to claim 4, characterized in that, The plurality of the second air pipes (9) and the plurality of the first air pipes (4) are all arranged in a circular array, and the plurality of the second air pipes (9) and the plurality of the first air pipes (4) are arranged in a cross manner.

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