TWI829495B - Improved pneumatic drive structure - Google Patents

Abstract

An improvement in the structure of a pneumatic driver, mainly in that the individual shaft cores of the pneumatic driver and a connected signal transmitter are merged into one; the upper part of the body of the pneumatic driver is located at an axis corresponding to the shaft core. There is an assembly slot integrally formed with the body for the signal transmitter to be arranged in the assembly slot; the bottom of the assembly slot is provided with an axis hole corresponding to the position of the axis, and the axis penetrates the pneumatic driver through the axis hole. The main body and the inside of the assembly slot; the assembly slot is covered with a cover; through these settings, the signal transmitter and the pneumatic driver are originally separated and integrated into one, so as to ensure the axis of the two The verticality and concentricity are consistent, and the combination between the signal transmitter and the pneumatic actuator requires fewer assembly parts and more labor-saving assembly.

Description

Improved pneumatic drive structure

The invention relates to an improvement in the structure of a pneumatic driver. In particular, it refers to the integration of a signal transmitter and a pneumatic driver, which were originally independently separated, to ensure the concentricity and verticality of the movements of the pneumatic driver and the signal transmitter, and to integrate the pneumatic driver and the signal transmitter. The pneumatic driver has fewer parts and is more labor-saving to assemble.

According to manufacturing plants, various pipelines are installed to transport liquid or gaseous raw materials. The pipelines are equipped with relevant industrial valves at each transport point. The opening or closing of the valves is controlled to execute the pipeline's transport instructions. The manufacturing plant is huge, and the fluid control system must be able to strictly and closely execute instructions and be effectively controlled. To meet this requirement, a complete and effective central control system must be in place to maintain production efficiency and prevent industrial safety accidents.

Among them, the pneumatic actuator is one of the important components of the fluid control system. It receives external power source and converts it into axial torque, thereby turning the valve linked to the actuator to open or close the pipeline. The signal transmitter is also an important component of the fluid control system. The built-in sensor of the signal transmitter detects the position of the driver and instantly outputs a signal feedback current to the upper control loop, so that the real-time status of the fluid system can be controlled.

As shown in Figures 1 and 2, the conventional pneumatic driver 1 (accordingly, the power source of the driver is divided into two types: pneumatic and electric, and the present invention mainly uses the pneumatic driver) and the signal transmitter 2 are two independent components. The pneumatic driver 1 and the signal transmitter 2 are assembled and connected by a steel plate bracket 3, screws 30, washers 31 and nuts. It is known from practical experience that this assembly model has the following obvious deficiencies.

1. The pneumatic driver 1 (whether pneumatic or electric) and the signal transmitter 2 belong to different industrial fields. The user needs to purchase them separately and assemble them according to the assembly instructions. There are many screws 30, washers 31 and other fasteners during assembly. It is time-consuming and labor-intensive and not easy. During assembly, special attention must be paid to maintaining the concentricity and verticality between the two axes 10 and 20 of the pneumatic driver 1 and the signal transmitter 2. A little carelessness may cause damage to the operation. There is a potential risk of eccentric rotation of the two axes 10 and 20.

2. When the fluid in the pipeline 4 is pushed by huge pressure, the pipeline 4 will inevitably vibrate to a certain extent. This vibration will cause the screws 30 and nuts to loosen for a long time, thereby falling off and losing their fixing function.

3. The pneumatic driver 1 and the signal transmitter 2 are meshed and linked by a shaft core 10 and 20 respectively. When the two shaft cores 10 and 20 become loose due to shock, the two shaft cores 10 and 20 will inevitably be damaged and deflected. This causes the built-in sensor of the signal transmitter 2 to detect the position of the pneumatic actuator 1 inaccurately.

In view of the above-mentioned shortcomings in the application of the conventional combination between the pneumatic driver and the signal transmitter, the inventor made design improvements and thus came up with the present invention.

However, the main purpose of the present invention is to provide a method that integrates the signal transmitter and the pneumatic actuator into one body by integrating them separately and integrating the respective axes of the signal transmitter and the pneumatic actuator into one. This ensures consistent verticality and concentricity of the mandrel, and saves the assembly of the signal transmitter on the pneumatic actuator and the assembly time of the pneumatic actuator.

The main feature of the present invention is that the signal transmitter and the pneumatic actuator are integrally formed with their respective shaft cores; an integrally formed assembly groove is separated on the upper part of the pneumatic driver body and located at the axis corresponding to the shaft core. The signal transmitter is installed and configured in the assembly groove; the bottom of the assembly groove is provided with an axis hole corresponding to the position of the axis core, so that the assembly groove is communicated with the inside of the body, and the top of the axis core can penetrate the body and the assembly groove through the axis hole inside; the assembly notch is covered by a cover plate. Through these settings, the signal The transmitter and the pneumatic driver were originally separated and integrated into one to ensure that the verticality and concentricity of the axis of the pneumatic driver and the signal transmitter are consistent and will not cause loosening caused by the vibration of the fluid flowing in the pipeline. Potential risks are affected, and the assembly process can be eliminated, reducing the user's burden, eliminating potential risks caused by assembly errors, reducing procurement, and assembling fewer parts, making assembly more labor-saving.

The technical means and structures adopted by the present invention to achieve the above objects and effects are described below with reference to the following embodiments and drawings.

1:Pneumatic driver

10, 20: Axis core

2: Signal transmitter

3: Bracket

30:Screw

31:Wasi

4. 4a: Pipeline

5. 5a: Pneumatic driver

50, 50a: Ontology

501:Side cover

51, 51a: Shaft core

510: engaging hole

52, 52a: Cam

520: middle hole

521, 521a: embedded slot

53, 53a: piston

530, 530a: connecting rod

531, 531a: Cam ring

54:Spring set

55, 55a: airtight space

56, 56a, 56b: pipe joint

57:Assembly slot

570:Shaft hole

571:Cover

572:Screws

6: Signal transmitter

60:Magnetic sensor

61:Magnet

Figure 1 shows a three-dimensional reference diagram of a conventional pneumatic driver and signal transmitter installed on a pipeline.

Figure 2 shows an exploded view of a conventional pneumatic driver and signal transmitter.

Figure 3 shows a three-dimensional view of the combination of a single-action pneumatic driver and a signal transmitter according to an embodiment of the present invention.

Figure 4 shows an exploded view of the single-acting pneumatic driver and signal transmitter according to the embodiment of the present invention.

Figure 5 shows a cross-sectional front view of the single-acting pneumatic driver and signal transmitter under normal conditions according to the embodiment of the present invention.

Figure 6 shows a cross-sectional top view of the single-acting pneumatic actuator under normal conditions according to the embodiment of the present invention.

FIG. 7 is a cross-sectional top view of the signal transmitter under normal conditions according to the embodiment of the present invention.

Figure 8 shows a cross-sectional front view of the single-acting pneumatic driver and signal transmitter in a reverse operating state according to the embodiment of the present invention.

Figure 9 is a cross-sectional top view of the single-acting pneumatic actuator in a reverse operating state according to the embodiment of the present invention.

FIG. 10 is a cross-sectional top view of the signal transmitter in a reverse operating state according to the embodiment of the present invention.

Figure 11 is a perspective view of the single-acting pneumatic driver and signal transmitter installed on the pipeline according to the embodiment of the present invention.

Figures 12 and 13 show a top view of the action of the double-action pneumatic actuator inputting compressed air from the forward and reverse air ports respectively according to the embodiment of the present invention.

Referring to Figures 3 to 7, the pneumatic actuator 5 shown in the embodiment of the present invention is taken as an example of a single-acting pneumatic actuator. It has a hollow body 50, and an axis core 51 is arranged vertically in the middle of the body 50 and is restricted to only rotate in place. The middle section of the axis core 51 is connected and fixed with the middle hole 520 of a cam 52. , so that the cam 52 and the shaft core 51 can be integrally linked, and the left and right ends of the cam 52 are each provided with an embedding groove 521. There is a piston 53 on the left and right sides of the shaft core 51 and two spring groups 54 respectively located on the back sides of the two pistons 53 . Wherein, the two ends of the piston 53 facing the cam 52 are each connected with a cam ring 531 by a connecting rod 530. The cam ring 531 can be embedded in the embedding groove 521 for positioning and pivoting. One end of the spring group 54 is in contact with the side cover 501 locked on the outside of the body 50, and the other end is in contact with the piston 53, so that the two spring groups 54 have the force to push the two pistons 53 toward the axis core 51, and at the same time The two pistons 53 have synchronous deflection angle displacement of the traction axis core 51 (as shown in Figures 6 and 9). The bottom end of the shaft core 51 is provided with a meshing hole 510 (as shown in Figure 5) to connect with the valve shaft in a pipeline 4a (see Figure 11) that controls fluid circulation. When the shaft core 51 rotates at an angle, the valve The rotating shaft is also driven by the rotation angle to open or close the valve and control the fluid flow state in the pipeline 4a. There is an airtight space 55 inside the body 50 between the two pistons 53 (as shown in Figures 5, 6, 8, and 9). The airtight space 55 is located outside the body 50 and is provided with a pipe joint 56 for external compression. The gas enters the airtight space 55 or the compressed air in the airtight space 55 is released.

An integrally formed assembly groove 57 is separated from the upper part of the body 50 (as shown in Figures 3 to 5). The assembly groove 57 and the body 50 are made of stainless steel and are integrally formed by investment casting. For the signal transmitter 6 to be installed and configured therein. The bottom of the assembly groove 57 is provided with an axis hole 570 corresponding to the position of the axis core 51 (as shown in Figures 4 and 5). The axis core 51 can penetrate the body 50 and the interior of the assembly groove 57 through the axis hole 570 (as shown in Figure 5). ); the opening of the assembly slot 57 is covered by a cover plate 571 and locked with screws 572 . The signal transmitter 6 of this embodiment is a proximity sensor. It is located in the assembly groove 57 and is located on the left and right sides of the upper end of the shaft core 51. A magnetic sensor 60 is fixed on each side, and a magnet 61 is connected to the shaft core 51 (as shown in Figure 3 , 4), the magnet 61 is arranged perpendicularly to the axis core 51 and is located on the same horizontal plane as the two magnetic sensors 60 . The magnet 61 is located between the two magnetic sensors 60 . When used, the magnet 61 deflects in conjunction with the shaft core 51 (as shown in Figures 7 and 10). When the magnet 61 is in close proximity to one of the two magnetic sensors 60, the approached magnetic sensor 60 emits a signal due to electromagnetic induction and outputs it to upper control loop. Therefore, due to the proximity of the magnet 61 to one of the two magnetic sensors 60 and the feedback of different electrical signals, the remote monitoring personnel can know whether the valve in the pipeline 4a is indeed opened or closed.

According to the above, in the initial state (as shown in Figures 5 to 7), there is no air pressure in the airtight space 55 of the pneumatic driver 5. The two pistons 53 are thrust by the spring group 54 and move toward the center of the body 50, so that the two pistons 53 drive the cam. 52 rotates a quarter turn (90 degrees) counterclockwise, and the cam 52 receives this linear thrust and converts it into axial torsion, thereby rotating the shaft core 51, causing the shaft core 51 to synchronously rotate the valve in the pipeline 4a below. At the same time, the magnet 61 of the signal transmitter 6 also deflects in conjunction with the shaft core 51. When the magnet 61 is in close proximity to one of the two magnetic sensors 60, the magnetic sensor 60 emits an electromagnetic signal due to induction and outputs it to the upper control circuit. When compressed air enters through the pipe joint 56, as shown in Figures 8-9, the pressure of the air pushes the spring groups 54 corresponding to the individual compression of the two pistons 53 and retreats, causing the piston 53 to pull the cam 52 to move linearly and convert it into axial torque, driving the shaft. The core 51 rotates about 90 degrees clockwise, causing the shaft core 51 to synchronously rotate the valve in the pipeline 4a below, so that the pipeline 4a becomes open or closed.

In addition, please refer to Figures 12 and 13. The pneumatic actuator 5a is a double-acting pneumatic actuator and does not have the spring group shown in the single-acting pneumatic actuator. That is, when used, the forward and reverse tubes of the body 50a The joints 56a and 56b input compressed air individually, so that the compressed air can push the two pistons 53a to move linearly, and then control the cam 52a to convert axial torque to drive the shaft core 51a to rotate. Its action principle and action process are similar to those of single-acting pneumatic actuators. 5 is similar, and the linkage with signal transmitter 6 is also the same. The pneumatic driver 5a is mainly connected and fixed with a cam 52a in the middle section of the shaft core 51a in the body 50a, so that the cam 52a and the shaft core 51a can be integrally linked, and the left and right ends of the cam 52a are each provided with a cam 52a. The embedding groove 521a; the left and right sides of the shaft core 51a are each provided with a piston 53a; the two ends of the piston 53a facing the cam 52a are each connected to a cam ring 531a with a connecting rod 530a, and the cam ring 531a can be embedded in the embedding groove 521a is positioned and pivotable; an airtight space 55a is arranged inside the body 50a between the two pistons 53a. The airtight space 55a is connected to the body 50a by a forward pipe joint 56a and a reverse pipe joint 56b. The outside is connected and serves as a path for compressed air to enter and exit the pneumatic driver 5a, and the forward pipe joint 56a and the reverse pipe joint 56b can input compressed air individually to drive the two pistons 53a to perform reverse linear displacements that approach or deviate from each other. .

By providing an integral assembly groove 57 on the upper part of the body 50 of the pneumatic driver 5 and an axis hole 570 communicating between the body 50 and the assembly groove 57, the pneumatic driver 5 and the shaft core 51 of the signal transmitter 6 can be integrally formed. There is no need to install an additional conventional bracket 3 for mounting connection between them. The signal transmitter 6 and the pneumatic driver 5 are integrated into one body, which ensures that the verticality and concentricity of the axes of the pneumatic driver 5 and the signal transmitter 6 are consistent. It will not be affected by the vibration of the liquid flowing in the pipeline 4a, and has fewer assembly parts, making the assembly more labor-saving.

Therefore, the present invention has the following advantages and effects in application.

1. Integrate the signal transmitter 6 and the pneumatic driver 5 into one body after they were originally separated separately to ensure that the verticality and concentricity of the axes of the pneumatic driver 5 and the signal transmitter 6 are consistent, and there is no concentricity or verticality. It will not be affected by the vibration of the fluid flowing in the pipeline, and reduces the potential risks caused by the loosening of screws, nuts, brackets, etc. caused by pipeline vibration.

2. The combination of the signal transmitter 6 and the pneumatic actuator 5 requires fewer assembly parts, making the assembly more labor-saving, eliminating and reducing the burden on the user during the assembly process, and eliminating potential risks caused by assembly errors.

3. The signal transmitter 6 and the pneumatic driver 5 do not need to be purchased separately, which can reduce the purchase and get it done at once.

To sum up, this invention is not only novel but also has industrial applicability. It is very convenient to apply for an invention patent in accordance with the law. I sincerely request your approval.

5:Pneumatic driver

50:Ontology

501:Side cover

51: Shaft core

510: engaging hole

52:Cam

520: middle hole

521: Embedded slot

53:Piston

530:Connecting rod

531: Cam ring

54:Spring set

56:Pipe joint

57:Assembly slot

570:Shaft hole

571:Cover

572:Screws

6: Signal transmitter

60:Magnetic sensor

61:Magnet

Claims (6)

An improved structure of a pneumatic driver, characterized by: the pneumatic driver and a connected signal transmitter, the shaft core between the two is integrally formed; the upper part of the body of the pneumatic driver is located at the axis corresponding to the shaft core, There is an assembly slot integrally formed with the body, for the signal transmitter to be installed in the assembly slot; the bottom of the assembly slot is provided with an axis hole corresponding to the position of the axis, and the axis can pass through the axis hole Passed through the interior of the body and the assembly groove; the assembly groove is covered with a cover; through these arrangements, the signal transmitter and the pneumatic driver are integrated into one body to ensure the verticality and stability of the axis Concentricity is consistent. The structural improvement of the pneumatic actuator as described in claim 1, wherein the bottom end of the shaft core is provided with a meshing hole to connect with the valve shaft in a pipeline that controls fluid circulation. The structural improvement of the pneumatic driver as described in claim 1, wherein the pneumatic driver is a single-acting pneumatic driver, and the middle section of the shaft core in the body is connected and fixed with a cam, so that the cam and the shaft core are connected It can be integrated and linked, and the left and right ends of the cam are each provided with an embedding groove; the left and right sides of the shaft core are each provided with a piston and two spring groups respectively located on the back sides of the two pistons; wherein, the two pistons face the cam A connecting rod is connected to a cam ring at each end, and the cam ring can be embedded in the embedding groove, positioned and pivoted; one end of the spring group is in contact with the side cover locked on the outside of the body, and the other end is in contact with the side cover locked on the outside of the body. The pistons are in contact; there is an airtight space inside the body between the two pistons. The airtight space is connected with the outside of the body through a pipe joint and serves as a passage for compressed air to enter and exit the pneumatic driver. The structural improvement of the pneumatic driver as described in claim 1, wherein the pneumatic driver is a double-acting pneumatic driver, and the middle section of the shaft core in the body is connected and fixed with a cam, so that the cam and the shaft core are connected It can be integrated and linked, and the left and right ends of the cam are each provided with an embedded groove; the left and right sides of the shaft core are each provided with a piston; the two pistons facing the cam end are each connected to a cam ring with a connecting rod. The cam ring system can be embedded in the embedded groove, positioned and pivoted; there is an airtight space inside the body between the two pistons, and the airtight space is connected with the outside of the body through two pipe joints. Compressed air enters and exits the passage of the pneumatic driver, and the two pipe joints can input compressed air individually to drive the two pistons to perform linear displacements that approach or deviate from each other. The structural improvement of the pneumatic driver as described in claim 1, wherein the signal transmitter is a proximity sensor with two magnetic sensors located on the left and right sides of the shaft core and a magnet fixedly connected to the shaft core. It is arranged perpendicularly to the axis and is located on the same horizontal plane as the two magnetic sensors. The magnet is located between the two magnetic sensors. The structural improvement of the pneumatic driver as described in claim 1, wherein the assembly groove and the system are made of stainless steel and are integrally formed by casting.