Cooling structure for pneumatic actuating mechanism

Abstract

The utility model relates to a cooling structure for a pneumatic actuating mechanism. The device comprises a mounting body which is arranged on the end face of a cylinder cover; the air inlet cavity is arranged in the mounting body and is annularly arranged, the air inlet cavity is provided with an air inlet for introducing cooling air and a plurality of air spray holes surrounding the push rod, and the air inlet extends in the axial direction of the push rod; the penetrating channel penetrates through the mounting body, one end of the penetrating channel is tightly attached to the end face of the cylinder cover and allows the push rod to penetrate through, and an air outlet is formed between the penetrating channel and the push rod; the gas spraying hole is communicated with the gas inlet cavity and the gas outlet, and cooling gas introduced through the gas inlet can be blown to the surface of the push rod through the gas spraying hole and then is discharged from the gas outlet. According to the utility model, real-time temperature detection can be carried out on key components, such as a push rod of a pneumatic actuating mechanism, which are easily influenced by temperature rise due to heat conduction, effective temperature control and cooling adjustment can be realized, and the structure is compact on the premise of keeping the performance.

Description

Technical Field

[0001] This utility model relates to the field of instrumentation technology for the control valve industry, and in particular to a cooling structure for pneumatic actuators. Background Technology

[0002] In industrial automation control systems, pneumatic actuators, as one of the important driving devices for control valves, are widely used in petrochemical, coal chemical, and steel smelting industries. The normal operation of pneumatic actuators directly affects the safe and stable operation of valves and the entire control system. However, in practical applications, the medium transported by the valve often causes localized heat transfer, leading to a rapid increase in temperature in localized areas. When temperature-sensitive components such as rubber seals are present in the pneumatic actuator, the high-temperature environment can severely affect the durability of the seals and the overall reliability of the system, and may even lead to device failure.

[0003] Currently, to address this issue of localized temperature rise, some traditional designs employ structural extensions or the addition of isolation devices to mitigate the temperature increase. However, these improvements often significantly increase the volume and overall size of the pneumatic actuator, thus affecting the flexibility of installation and spatial layout. Furthermore, this structural complexity makes it difficult to guarantee the pneumatic actuator's stable and reliable operation under long-term high-temperature conditions, thereby limiting its application range in high-temperature or highly thermally conductive environments. Summary of the Invention

[0004] Therefore, this utility model provides a cooling structure for pneumatic actuators, which can not only detect the temperature of key components such as push rods of pneumatic actuators that are easily affected by temperature rise due to heat conduction in real time, but also achieve effective temperature control and cooling regulation, while achieving a compact structure while maintaining performance.

[0005] To solve the above-mentioned technical problems, this utility model provides a cooling structure for a pneumatic actuator, the pneumatic actuator including a cylinder head and a push rod that passes through and extends and retracts along the cylinder head, the cooling structure including:

[0006] The mounting body is disposed on the end face of the cylinder head;

[0007] An air intake chamber is provided in the mounting body and is arranged in a ring shape. The air intake chamber is provided with an air inlet for cooling gas to enter and a plurality of gas nozzles surrounding the push rod. The air inlet extends along the axial direction of the push rod.

[0008] A through-channel extends through the mounting body, with one end of the through-channel tightly attached to the end face of the cylinder head and through which the push rod passes, forming an air outlet between the through-channel and the push rod;

[0009] The gas nozzle is connected to the air inlet and the air outlet. Cooling gas introduced through the air inlet can be blown onto the surface of the push rod through the gas nozzle and then discharged from the air outlet.

[0010] In one embodiment of this utility model, the gas nozzle is tilted toward the exhaust direction of the gas outlet.

[0011] In one embodiment of this utility model, the plurality of gas nozzles are evenly distributed circumferentially along the central axis of the push rod.

[0012] In one embodiment of this utility model, it further includes a bracket, a control device, and an air source. The bracket is mounted on the cylinder head, and the control device and the air source are respectively mounted on the bracket. The air source is connected to the air inlet by an air pipe, and a solenoid valve is connected between the control device and the air source.

[0013] In one embodiment of the present invention, a first temperature sensor electrically connected to the control device is further included. The first temperature sensor is installed between the cylinder head and the bracket and is used to detect the temperature of the cylinder head.

[0014] In one embodiment of this utility model, a second temperature sensor electrically connected to the control device is further included. The second temperature sensor is mounted on the mounting body and is used to detect the temperature of the push rod.

[0015] In one embodiment of the present invention, the mounting body includes a base connected to the cylinder head and a nozzle body installed between the base and the cylinder head;

[0016] The base includes a first disc body and a stepped groove is formed along the axial direction of the first disc body, and the stepped groove has a first step;

[0017] The nozzle body includes a second disc, a boss extending axially along the second disc, and a second step formed between the boss and the disc. The second disc has a through channel in the middle. An annular groove is formed at the junction between the second disc and the boss. The nozzle body extends into the stepped groove. The first step and the second step abut against each other to close the annular groove and form the air inlet. The air inlet is axially disposed on the first disc.

[0018] In one embodiment of the present invention, the first step includes a first axial contact surface and a first radial contact surface, and the second step includes a second axial contact surface and a second radial contact surface corresponding to the first axial contact surface and the first radial contact surface. A first sealing ring is provided between the first axial contact surface and the second axial contact surface, and a second sealing ring is provided between the first radial contact surface and the second radial contact surface. The first sealing ring and the second sealing ring are disposed adjacent to the air intake cavity.

[0019] In one embodiment of this utility model, a mounting groove is provided on the axial end face of the second disc near the through channel, a mounting hole is provided on the mounting groove, a thermal sensor is mounted on the mounting groove, a fixing screw for fixing the thermal sensor is installed in the mounting hole, and the detection end of the thermal sensor extends into the through channel and faces the push rod.

[0020] In one embodiment of this utility model, each of the gas nozzles is disposed through the common wall between the annular groove and the through channel.

[0021] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0022] This utility model discloses a cooling structure for pneumatic actuators. Cooling control is achieved by installing a mounting body (including a base and a nozzle body) at the end of the cylinder head, along with a bracket, control device, and air source. The overall size is compact, minimizing disruption to existing spatial layouts and facilitating adaptation in industrial settings. By adding a compact cooling structure to the cylinder head end face, combined with a temperature sensor, control device, and compressed gas cooling, efficient cooling of key components of the pneumatic actuator is achieved. This allows for real-time monitoring and precise control while maintaining a compact structure and ease of maintenance, demonstrating broad industrial application prospects.

[0023] The intake chamber of this invention is arranged in a ring shape, with multiple gas nozzles distributed around the push rod, allowing compressed air to be evenly sprayed onto the push rod surface from all sides, achieving rapid and effective cooling. A first temperature sensor and a second temperature sensor are installed at key components such as the cylinder head and push rod to monitor the temperature of the actuator in real time. When the temperature reaches or exceeds a preset threshold, the control device immediately takes cooling measures, effectively avoiding problems such as aging, performance degradation, or even failure of seals due to localized overheating. Attached Figure Description

[0024] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the cooling structure of the present invention used in pneumatic actuators.

[0026] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0027] Figure 3 This is a schematic diagram of the nozzle body of this utility model.

[0028] Figure 4 This is a structural schematic diagram of the base of this utility model.

[0029] Explanation of reference numerals in the instruction manual:

[0030] 1. Pneumatic actuator; 11. Cylinder head; 12. Push rod;

[0031] 2. Mounting body; 21. Air inlet chamber; 211. Air inlet; 22. Gas nozzle;

[0032] 3. Bracket;

[0033] 4. Control device; 41. First temperature sensor; 42. Second temperature sensor; 43. Gas source; 44. Gas pipe; 45. Solenoid valve; 46. Wire;

[0034] 5. Base; 51. First disc; 511. Stepped groove; 512. First step; 512a. First axial contact surface; 512b. First radial contact surface;

[0035] 6. Nozzle body; 61. Second disc body; 611. Mounting groove; 612. Fixing screw; 613. Mounting hole; 62. Boss; 63. Second step; 63a. Second axial contact surface; 63b. Second radial contact surface; 64. Through channel; 641. Air outlet; 65. Annular groove; 66. First sealing ring; 67. Second sealing ring. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0037] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0038] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0039] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0040] Reference Figure 1 , Figure 2 As shown, this utility model discloses a cooling structure for a pneumatic actuator 1. The pneumatic actuator 1 includes a cylinder head 11 and a push rod 12 that passes through and extends and retracts along the cylinder head 11. The cooling structure includes:

[0041] Mounting body 2 is disposed on the end face of the cylinder head 11;

[0042] An air intake chamber 21 is disposed within the mounting body 2 and is arranged in a ring shape. The air intake chamber 21 is provided with an air inlet 211 for cooling gas to enter and a plurality of gas nozzles 22 surrounding the push rod 12. The air inlet 211 extends along the axial direction of the push rod 12.

[0043] A through-channel 64 extends through the mounting body 2. One end of the through-channel 64 is close to the end face of the cylinder head 11 and allows the push rod 12 to pass through. An air outlet 641 is formed between the through-channel 64 and the push rod 12.

[0044] The gas nozzle 22 is connected to the air inlet 21 and the air outlet 641. Cooling gas (compressed gas) introduced through the air inlet 211 can be blown onto the surface of the push rod 12 through the gas nozzle 22 and then discharged from the air outlet 641.

[0045] In one embodiment, the gas nozzle 22 is tilted toward the exhaust direction of the gas outlet 641, which optimizes the airflow channel and reduces energy consumption and gas waste while ensuring the cooling effect.

[0046] In one embodiment, a plurality of gas nozzles 22 are evenly distributed circumferentially along the central axis of the push rod 12. It should be noted that the number of gas nozzles 22, the air inlet 211, and the size of the gas nozzles 22 can also be designed and changed according to actual conditions. The air inlet chamber 21 is arranged in a ring shape, and a plurality of gas nozzles 22 are distributed around the push rod 12, thereby enabling compressed air to be evenly sprayed onto the surface of the push rod 12 from all sides, achieving rapid and effective cooling.

[0047] In one embodiment, refer to Figure 1 As shown, it also includes a bracket 3, a control device 4, and an air source 43. The bracket 3 is mounted on the cylinder head 11. The control device 4 and the air source 43 are respectively mounted on the bracket 3. The air source 43 is connected to the air inlet 211 by an air pipe 44. A solenoid valve 45 is connected between the control device 4 and the air source 43.

[0048] Specifically, it also includes a first temperature sensor 41 electrically connected to the control device 4. The first temperature sensor 41 is installed between the cylinder head 11 and the bracket 3 and is used to detect the temperature of the cylinder head 11.

[0049] It also includes a second temperature sensor 42 electrically connected to the control device 4. The second temperature sensor 42 is mounted on the mounting body 2 and is used to detect the temperature of the push rod 12.

[0050] The first temperature sensor 41 and the second temperature sensor 42 are both connected to the control device 4 via wires 46.

[0051] The first temperature sensor 41 and the second temperature sensor 42 are both thermistors. The first temperature sensor 41 is installed between the cylinder head 11 and the bracket 3, which makes the temperature acquisition more accurate. It does not occupy extra space when installed between the bracket 3 and the cylinder head 11, and it is not exposed to the external environment, which also provides a certain degree of protection for the thermistor.

[0052] For example, the air source 43 is a compressed air tank. After receiving the relevant signal, the control device 4 controls the on / off state of the compressed air delivery switch by transmitting a control signal to the solenoid valve 45. The control device 4 includes a small control box, which can be magnetically or bolted to the bracket 3, and the material can be plastic or stainless steel. The control box is equipped with a display screen to display the temperature at the push rod 12 (and cylinder head 11) in real time, and determines whether compressed air needs to be injected based on the current temperature. At the same time, a manual device (such as a button) is also provided so that the user can manually start the injection of compressed air when needed; in addition, the data of the control box can be interconnected with a mobile phone to realize remote control function. In the specific operation process, the real-time temperature of the cylinder head 11 is collected by the first temperature sensor 41, and the real-time temperature of the push rod 12 is collected by the second temperature sensor 42. The temperature data collected by both are transmitted to the control device 4 via the wire 46. The control device 4 displays the received temperature data on the screen in real time. If the current temperature reaches the corresponding preset threshold, the control device 4 sends a signal to the solenoid valve 45, so that compressed air is delivered through the air inlet 211 of the base 5 and sprayed out through the gas nozzle 22 to directly cool the push rod 12.

[0053] By arranging a first temperature sensor 41 and a second temperature sensor 42 at key components such as the cylinder head 11 and push rod 12, the temperature of the actuator can be monitored in real time. When the temperature reaches or exceeds a preset threshold, the control device 4 immediately takes cooling measures to effectively avoid problems such as aging, performance degradation, or even failure of seals caused by local overheating.

[0054] In one embodiment, refer to Figure 3 , Figure 4 As shown, the mounting body 2 includes a base 5 that is bolted to the cylinder head 11 and a nozzle body 6 that is mounted between the base 5 and the cylinder head 11.

[0055] The base 5 includes a first disc 51 and a stepped groove 511 is formed along the axial direction of the first disc 51. The stepped groove 511 has a first step 512.

[0056] The nozzle body 6 includes a second disc 61, a boss 62 extending axially along the second disc 61, and a second step 63 formed between the boss 62 and the disc. The second disc 61 has a through channel 64 in the middle. An annular groove 65 is formed at the junction between the second disc 61 and the boss 62. The nozzle body 6 extends into the stepped groove 511. The first step 512 and the second step 63 abut against each other to close the annular groove 65 and form the air inlet 21. The air inlet 211 is axially disposed on the first disc 51.

[0057] It should be noted that the split design of the mounting body 2 improves the overall durability and stability of the structure, reduces the complexity of the structure, and facilitates installation and subsequent maintenance.

[0058] In one embodiment, the first step 512 includes a first axial contact surface 512a and a first radial contact surface 512b, and the second step 63 includes a second axial contact surface 63a and a second radial contact surface 63b corresponding to the first axial contact surface 512a and the first radial contact surface 512b. A first sealing ring 66 is provided between the first axial contact surface 512a and the second axial contact surface 63a, and a second sealing ring 67 is provided between the first radial contact surface 512b and the second radial contact surface 63b. The first sealing ring 66 and the second sealing ring 67 are disposed adjacent to the air intake chamber 21.

[0059] Between the first step 512 and the second step 63 at the junction of the base 5 and the nozzle body 6, the first sealing ring 66 and the second sealing ring 67 achieve a good seal for the air intake chamber 21, preventing compressed air leakage and ensuring efficient cooling of the compressed air. This not only greatly improves gas utilization efficiency but also creates a stable cooling airflow channel inside, reducing the risks and costs associated with air leakage.

[0060] Specifically, a mounting groove 611 is provided on the axial end face of the second disc 61 near the through channel 64. A mounting hole 613 is provided on the mounting groove 611, and a thermal sensor (i.e., the second temperature sensor 42) is mounted on the mounting groove 611. A fixing screw 612 for fixing the thermal sensor is installed in the mounting hole 613. The detection end of the thermal sensor extends into the through channel 64 and faces the push rod 12. The proximity of the second temperature sensor 42 to the push rod 12 of the actuator facilitates accurate measurement of the temperature of the push rod 12 and timely signal feedback.

[0061] In one embodiment, refer to Figure 3 As shown, each of the gas nozzles 22 is disposed through the common wall between the annular groove 65 and the through channel 64.

[0062] The above setup simplifies the structure for temperature detection and cooling. The temperature of the push rod 12 can be accurately determined through the feedback from the thermal sensor. It is easy to operate, requires little installation space, and has a compact overall size. It will not significantly affect the original spatial layout, and it is easy to adapt to industrial scenarios. It is also easy to replace, has relatively low design and manufacturing costs, and can greatly improve the service life of the seal.

[0063] The cooling structure is mainly installed on the end face of the cylinder head 11 of the pneumatic actuator 1. The first temperature sensor 41 (installed between the cylinder head 11 and the bracket 3) is used to detect the temperature of the cylinder head 11; the second temperature sensor 42 (installed on the nozzle body 6 and facing the push rod 12) is used to detect the temperature of the push rod 12. In industrial settings, after the pneumatic actuator 1 starts working, if the temperature of the conveyed medium is high or it is operating in a high-temperature environment, the temperature of the cylinder head 11 and the push rod 12 will gradually rise.

[0064] The first temperature sensor 41 and the second temperature sensor 42 collect the temperature data of the cylinder head 11 and push rod 12 in real time and transmit the signal to the control device 4.

[0065] The control device 4 receives and processes temperature data from the sensor, displays it in real time on the control box screen, and compares it with the set temperature threshold.

[0066] When the temperature at one (or two) locations exceeds a preset threshold, the control device 4 will send an opening signal to the solenoid valve 45, causing it to connect the compressed air pipe 44.

[0067] After the solenoid valve 45 is opened, the air source 43 delivers compressed air through the air pipe 44 to the air inlet 211 on the base 5.

[0068] Compressed air is injected from all sides toward the push rod 12 through the gas nozzle 22, which rapidly cools the surface of the push rod 12. The cooled hot air is then discharged from the outlet 641 between the through channel 64 and the push rod 12.

[0069] With continuous injection of compressed air, the temperature of pushrod 12 (and cylinder head 11) will gradually decrease. At this time, the sensor continues to feed back the current temperature information to the control device 4.

[0070] If the temperature drops to a safe range or below the temperature threshold, the control device 4 will send a shut-off signal to the solenoid valve 45 to stop the input of compressed air, thereby achieving automated and energy-saving cooling control.

[0071] If the temperature still does not reach the ideal range, the control device 4 will continue to keep the solenoid valve 45 open, extending the injection time until the temperature drops below the set value and then stops the injection.

[0072] Users can also manually turn the cooling spray on or off using the buttons on the control box to handle emergencies or take emergency measures. The control box can also be interconnected with mobile phones or other remote control terminals, allowing users to view the temperature data of the actuator in real time and control the spray switch remotely, further improving the level of industrial automation and intelligence.

[0073] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cooling structure for a pneumatic actuator, said pneumatic actuator (1) comprising a cylinder head (11) and a push rod (12) extending through and along said cylinder head (11), characterized in that, The cooling structure comprises: a mounting body (2) arranged on an end surface of the cylinder cover (11); an air inlet cavity (21) arranged in the mounting body (2) and in a ring shape, the air inlet cavity (21) being provided with an air inlet (211) for cooling gas to pass in and a plurality of gas injection holes (22) surrounding the push rod (12), the air inlet (211) extending along an axial direction of the push rod (12); a through channel (64) penetrating through the mounting body (2), one end of the through channel (64) being close to the end surface of the cylinder cover (11) and for the push rod (12) to pass through, an air outlet (641) being formed between the through channel (64) and the push rod (12); wherein the gas injection holes (22) are communicated between the air inlet cavity (21) and the air outlet (641), the cooling gas passing in through the air inlet (211) being capable of being blown to the surface of the push rod (12) through the gas injection holes (22) and then being discharged from the air outlet (641).

2. The cooling structure for a pneumatic actuator according to claim 1, wherein The gas injection holes (22) are inclined towards the exhaust direction of the air outlet (641).

3. The cooling structure for a pneumatic actuator according to claim 1, wherein The plurality of gas injection holes (22) are uniformly distributed along the circumferential direction of the central axis of the push rod (12).

4. The cooling structure for a pneumatic actuator according to claim 1, wherein Further comprising a bracket (3), a control device (4) and a gas source (43), the bracket (3) being mounted on the cylinder cover (11), the control device (4) and the gas source (43) being respectively mounted on the bracket (3), the gas source (43) being connected with a gas pipe (44) of the air inlet (211), and the control device (4) being connected with the gas source (43) through an electromagnetic valve (45).

5. The cooling structure for a pneumatic actuator according to claim 4, wherein Further comprising a first temperature sensor (41) electrically connected with the control device (4), the first temperature sensor (41) being mounted between the cylinder cover (11) and the bracket (3) and used for detecting the temperature of the cylinder cover (11).

6. The cooling structure for a pneumatic actuator according to claim 4, wherein Further comprising a second temperature sensor (42) electrically connected with the control device (4), the second temperature sensor (42) being mounted on the mounting body (2) and used for detecting the temperature of the push rod (12).

7. The cooling structure for a pneumatic actuator according to claim 1, wherein The mounting body (2) comprises a base (5) connected with the cylinder cover (11) and a nozzle body (6) mounted between the base (5) and the cylinder cover (11); the base (5) comprises a first disc body (51) and a stepped groove (511) axially arranged on the first disc body (51), the stepped groove (511) having a first step (512); The nozzle body (6) comprises a second disc body (61), a boss (62) extending axially along the second disc body (61), and a second step (63) formed between the boss (62) and the disc body, a through channel (64) is formed in the middle of the second disc body (61), an annular groove (65) is formed at the joint between the second disc body (61) and the boss (62), the nozzle body (6) extends into the stepped groove (511), the first step (512) and the second step (63) abut to close the annular groove (65) and form the air inlet cavity (21), and the air inlet (211) is arranged axially on the first disc body (51).

8. The cooling structure for a pneumatic actuator according to claim 7, wherein The first step (512) comprises a first axial contact surface (512a) and a first radial contact surface (512b), the second step (63) comprises a second axial contact surface (63a) and a second radial contact surface (63b) corresponding to the first axial contact surface (512a) and the first radial contact surface (512b), a first sealing ring (66) is arranged between the first axial contact surface (512a) and the second axial contact surface (63a), a second sealing ring (67) is arranged between the first radial contact surface (512b) and the second radial contact surface (63b), and the first sealing ring (66) and the second sealing ring (67) are arranged adjacent to the air inlet cavity (21).

9. The cooling structure for a pneumatic actuator according to claim 7, wherein An installation groove (611) is arranged on the second disc body (61) adjacent to the axial end face of the through channel (64), an installation hole (613) is arranged on the installation groove (611), a thermal sensor is installed on the installation groove (611), a fixing screw (612) for fixing the thermal sensor is installed on the installation hole (613), and a detection end of the thermal sensor extends into the through channel (64) and faces the push rod (12).

10. The cooling structure for a pneumatic actuator according to claim 7, wherein Each gas injection hole (22) is arranged through a common wall between the annular groove (65) and the through channel (64).

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