Pneumatic actuator capable of being opened and closed stably

Abstract

The utility model discloses a pneumatic actuator capable of being opened and closed stably, which comprises a pneumatic actuator main body, a pneumatic actuator upper cover, a diaphragm, a push rod and an air delivery pipe, the pneumatic actuator upper cover is arranged at the top end of the pneumatic actuator main body, the diaphragm is arranged inside the pneumatic actuator upper cover, the push rod is fixed below the diaphragm, and the air delivery pipe is arranged on the pneumatic actuator main body. Springs are arranged at the positions, on the two sides of the push rod, in the pneumatic actuator body, the air conveying pipe is installed at the position, above the diaphragm, of the top of the pneumatic actuator upper cover, air outlet holes are formed in the bottom end of the air conveying pipe at equal intervals, a guide sleeve is installed on the outer wall of the bottom of the push rod, and guide wheels are installed at the two ends in the guide sleeve; and guide rods are fixed in the pneumatic actuator main body at the positions of the guide sleeves. The internal structure is optimized, uniform thrust can be applied to the diaphragm, the push rod can be guided and limited, vertical stretching and retracting of the spring can be guaranteed, and therefore the stability of opening and closing of the valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic actuators, in particular to a stable opening and closing type pneumatic actuator. Background Art

[0002] Pneumatic actuators are actuators that use air pressure to drive the opening, closing or regulating of valves. They are also called pneumatic actuators or pneumatic devices. The actuators and regulating mechanisms of pneumatic actuators are a unified whole. The actuators include diaphragm type, piston type, scotch fork type and gear rack type. Among them, diaphragm actuators are commonly used. They can be used as a driving device for general control valves to form pneumatic diaphragm actuators. The signal pressure of the pneumatic diaphragm actuator acts on the diaphragm, causing it to deform, driving the push rod on the diaphragm to move, causing the valve core to shift, thereby changing the opening of the valve. It has a simple structure, low price, easy maintenance, and is widely used.

[0003] When the opening and closing of a valve is controlled by a pneumatic actuator, the gas input into the pneumatic actuator is often concentrated, making it difficult for the diaphragm to drive the push rod to move smoothly. In addition, the push rod lacks effective guidance, and is not stable and reliable when moving, resulting in the valve opening and closing being not stable enough. Therefore, improvement is urgently needed. Utility Model Content

[0004] The purpose of the utility model is to provide a smooth opening and closing pneumatic actuator to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a smooth opening and closing pneumatic actuator, comprising a pneumatic actuator body, a pneumatic actuator upper cover, a diaphragm, a push rod and an air pipe, the pneumatic actuator upper cover is arranged at the top of the pneumatic actuator body, the diaphragm is installed inside the pneumatic actuator upper cover, the push rod is fixed below the diaphragm, springs are arranged inside the pneumatic actuator body on both sides of the push rod, the air pipe is installed on the top of the pneumatic actuator upper cover above the diaphragm, and the bottom end of the air pipe is provided with air outlet holes with equal spacing, a guide sleeve is installed on the outer wall of the bottom of the push rod, and guide wheels are installed at both ends of the guide sleeve, and guide rods are fixed inside the pneumatic actuator body at the position of the guide sleeve.

[0006] Preferably, lower mounting plates are fixed on both outer walls of the pneumatic actuator body, and an upper mounting plate is fixed on the outer wall of the pneumatic actuator upper cover at the position of the lower mounting plate, and the internal threads of the upper mounting plate and the lower mounting plate are connected by bolts for disassembly and assembly of the pneumatic actuator.

[0007] Preferably, a sealing groove is provided at the edge position of the top of the pneumatic actuator body, and a sealing ring is adhered to the bottom end of the pneumatic actuator upper cover at the position of the sealing groove, and the sealing ring fits tightly with the sealing groove, thereby improving the sealing between the pneumatic actuator body and the pneumatic actuator upper cover.

[0008] Preferably, an air inlet pipe is installed at the top end of the air supply pipe, and the top end of the air inlet pipe extends to above the upper cover of the pneumatic actuator, so as to introduce gas into the air supply pipe.

[0009] Preferably, a lower sleeve is mounted on the bottom of the spring, and an upper sleeve is mounted on the top of the spring, the bottom end of the upper sleeve extends into the interior of the lower sleeve, the top and bottom ends of the spring are fixedly connected to the upper sleeve and the lower sleeve respectively, and the spring can be limited to allow it to extend and retract vertically.

[0010] Preferably, both ends of the guide sleeve are slidably connected to the guide rod.

[0011] Preferably, a guide groove is provided on the outer wall of the guide rod on one side close to the push rod, and the guide groove cooperates with the guide wheel to guide the guide wheel.

[0012] Preferably, the lower sleeve is fixedly connected to the pneumatic actuator body, and the upper sleeve is fixedly connected to the diaphragm.

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

[0014] The gas enters the gas transmission pipe through the air inlet pipe and is evenly discharged through the air outlet, so that the gas applies a uniform pushing force to the diaphragm, and the diaphragm drives the push rod to move downward, and the push rod controls the valve to open. In the process of the push rod moving downward, the push rod compresses the spring, and the upper sleeve retracts into the interior of the lower sleeve. The lower sleeve and the upper sleeve cooperate with each other to limit the spring, so that it can expand and contract vertically; the push rod drives the guide sleeve to move downward along the guide rod, and the guide sleeve drives the guide wheel to roll along the guide groove, guiding and limiting the movement of the push rod, thereby improving the stability of the push rod movement, and then improving the stability of the opening and closing of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0016] Figure 2 It is a partial cross-sectional enlarged structural schematic diagram of the utility model;

[0017] Figure 3 This is a three-dimensional enlarged structural diagram of the gas transmission pipe of the utility model;

[0018] Figure 4 It is a schematic diagram of the spring enlargement structure of the utility model;

[0019] Figure 5 For the utility model Figure 1 Enlarged structural diagram at A in the middle.

[0020] In the figure: 1. pneumatic actuator body; 2. pneumatic actuator upper cover; 3. diaphragm; 4. push rod; 5. air pipe; 501, air outlet; 6. spring; 7. guide sleeve; 701, guide wheel; 8. guide rod; 801, guide groove; 9. air inlet pipe; 10. lower sleeve; 11. upper sleeve; 12. sealing groove; 13. sealing ring; 14. upper mounting plate; 15. lower mounting plate; 16. bolt. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the utility model shall fall within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides an embodiment: a smooth opening and closing pneumatic actuator, comprising a pneumatic actuator body 1, a pneumatic actuator upper cover 2, a diaphragm 3, a push rod 4 and an air pipe 5, the pneumatic actuator upper cover 2 is arranged on the top of the pneumatic actuator body 1, the diaphragm 3 is installed inside the pneumatic actuator upper cover 2, the push rod 4 is fixed below the diaphragm 3, and springs 6 are arranged inside the pneumatic actuator body 1 on both sides of the push rod 4;

[0024] The air delivery pipe 5 is installed on the top of the pneumatic actuator cover 2 above the diaphragm 3, and the bottom end of the air delivery pipe 5 is provided with air outlet holes 501 at equal intervals;

[0025] A guide sleeve 7 is installed on the outer wall of the bottom of the push rod 4, and guide wheels 701 are installed at both ends of the guide sleeve 7. A guide rod 8 is fixed inside the pneumatic actuator body 1 at the position of the guide sleeve 7.

[0026] The two outer walls of the pneumatic actuator body 1 are fixed with lower mounting plates 15, and the outer wall of the pneumatic actuator upper cover 2 at the position of the lower mounting plates 15 is fixed with an upper mounting plate 14, and the internal threads of the upper mounting plate 14 and the lower mounting plate 15 are connected with bolts 16;

[0027] A sealing groove 12 is provided at the edge of the top of the pneumatic actuator body 1, and a sealing ring 13 is adhered to the bottom of the pneumatic actuator upper cover 2 at the position of the sealing groove 12, and the sealing ring 13 fits tightly with the sealing groove 12;

[0028] An air inlet pipe 9 is installed at the top of the air delivery pipe 5, and the top of the air inlet pipe 9 extends to the top of the pneumatic actuator upper cover 2;

[0029] Specifically, the gas enters the gas delivery pipe 5 through the gas inlet pipe 9 and is evenly discharged through the gas outlet 501. This design enables the gas to exert a uniform driving force on the diaphragm 3;

[0030] The bottom of the spring 6 is sleeved with a lower sleeve 10, and the top of the spring 6 is sleeved with an upper sleeve 11, the bottom end of the upper sleeve 11 extends into the interior of the lower sleeve 10, and the top and bottom ends of the spring 6 are fixedly connected to the upper sleeve 11 and the lower sleeve 10 respectively;

[0031] Specifically, during the downward movement of the push rod 4, the push rod 4 compresses the spring 6. At this time, the upper sleeve 11 is retracted into the lower sleeve 10. The lower sleeve 10 and the upper sleeve 11 cooperate with each other to limit the spring 6, so that it can be vertically extended and retracted.

[0032] Both ends of the guide sleeve 7 are slidably sleeved with the guide rod 8;

[0033] A guide groove 801 is provided on the outer wall of the guide rod 8 near the push rod 4, and the guide groove 801 cooperates with the guide wheel 701;

[0034] Specifically, the push rod 4 drives the guide sleeve 7 to move downward along the guide rod 8, and the guide sleeve 7 drives the guide wheel 701 to roll along the guide groove 801, thereby guiding and limiting the movement of the push rod 4, thereby improving the stability of the movement of the push rod 4;

[0035] The lower sleeve 10 is fixedly connected to the pneumatic actuator body 1 , and the upper sleeve 11 is fixedly connected to the diaphragm 3 .

[0036] When the embodiment of the present application is in use: first, the gas enters the gas delivery pipe 5 through the air inlet pipe 9, and then is evenly discharged through the air outlet 501. This design allows the gas to apply a uniform pushing force to the diaphragm 3, and the diaphragm 3 drives the push rod 4 to move downward, and the push rod 4 controls the valve to open. In the process of the push rod 4 moving downward, the push rod 4 compresses the spring 6. At this time, the upper sleeve 11 retracts into the interior of the lower sleeve 10, and the lower sleeve 10 and the upper sleeve 11 cooperate with each other to limit the spring 6 to make it vertically expand and contract. At the same time, the push rod 4 drives the guide sleeve 7 to move downward along the guide rod 8, and the guide sleeve 7 drives the guide wheel 701 to roll along the guide groove 801, guiding and limiting the movement of the push rod 4, thereby improving the stability of the movement of the push rod 4. The pneumatic actuator optimizes the internal structure, can apply a uniform thrust to the diaphragm 3, can guide and limit the push rod 4, and can also ensure the vertical expansion and contraction of the spring 6, thereby improving the stability of the valve opening and closing.

[0037] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A smooth opening and closing pneumatic actuator, characterized in that: The invention comprises a pneumatic actuator body (1), a pneumatic actuator upper cover (2), a diaphragm (3), a push rod (4) and an air supply pipe (5), wherein the pneumatic actuator upper cover (2) is arranged at the top of the pneumatic actuator body (1), the diaphragm (3) is installed inside the pneumatic actuator upper cover (2), the push rod (4) is fixed below the diaphragm (3), springs (6) are arranged inside the pneumatic actuator body (1) on both sides of the push rod (4), the air supply pipe (5) is installed on the top of the pneumatic actuator upper cover (2) above the diaphragm (3), and the bottom end of the air supply pipe (5) is provided with air outlet holes (501) at equal intervals, a guide sleeve (7) is installed on the outer wall of the bottom of the push rod (4), and guide wheels (701) are installed at both ends of the guide sleeve (7), and a guide rod (8) is fixed inside the pneumatic actuator body (1) at the position of the guide sleeve (7).

2. A smooth opening and closing pneumatic actuator according to claim 1, characterized in that: A lower mounting plate (15) is fixed on both outer walls of the pneumatic actuator body (1), an upper mounting plate (14) is fixed on the outer wall of the pneumatic actuator upper cover (2) at the position of the lower mounting plate (15), and bolts (16) are connected to the internal threads of the upper mounting plate (14) and the lower mounting plate (15).

3. A smooth opening and closing pneumatic actuator according to claim 1, characterized in that: A sealing groove (12) is provided at the edge of the top of the pneumatic actuator body (1), and a sealing ring (13) is adhered to the bottom of the pneumatic actuator upper cover (2) at the position of the sealing groove (12), and the sealing ring (13) is tightly fitted to the sealing groove (12).

4. A smooth opening and closing pneumatic actuator according to claim 1, characterized in that: An air inlet pipe (9) is installed at the top end of the air delivery pipe (5), and the top end of the air inlet pipe (9) extends to the top of the upper cover (2) of the pneumatic actuator.

5. A smooth opening and closing pneumatic actuator according to claim 1, characterized in that: The bottom of the spring (6) is sleeved with a lower sleeve (10), and the top of the spring (6) is sleeved with an upper sleeve (11), the bottom end of the upper sleeve (11) extends into the interior of the lower sleeve (10), and the top and bottom ends of the spring (6) are fixedly connected to the upper sleeve (11) and the lower sleeve (10) respectively.

6. A smooth opening and closing pneumatic actuator according to claim 1, characterized in that: Both ends of the guide sleeve (7) are slidably sleeved with the guide rod (8).

7. A smooth opening and closing pneumatic actuator according to claim 1, characterized in that: A guide groove (801) is provided on the outer wall of the guide rod (8) on the side close to the push rod (4), and the guide groove (801) cooperates with the guide wheel (701).

8. The smooth opening and closing pneumatic actuator according to claim 5, characterized in that: The lower sleeve (10) is fixedly connected to the pneumatic actuator body (1), and the upper sleeve (11) is fixedly connected to the diaphragm (3).

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