Locking type angular travel actuator

Abstract

The utility model discloses a locking type angular travel actuator. The locking type angular travel actuator comprises a main oil cylinder, a main piston, a rack, a gear, a locking oil cylinder, a locking piston, a locking piece and a locking shaft, wherein the main oil cylinder and the main piston are arranged in pairs; the locking shaft axially moves along with the locking piston and has two states of being locked with the locking piece and being separated from the locking piece, and when the locking shaft and the locking piece are locked, the main piston is locked. The angular travel actuator has a position locking function, the locking shaft and the locking piece are coordinated through the locking oil cylinder and the locking piston, it can be ensured that the main piston is firmly locked when the angular travel actuator is in a full-open position or a full-closed position, misoperation is prevented, and therefore safety and stability of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a locking type angular travel actuator. Background Art

[0002] An angular-turn actuator is an actuator used to control the rotation or turning of a mechanical device to a specific angle. It is usually driven by an electric, pneumatic or hydraulic system to control the opening, closing or adjustment of valves, gates, doors and windows. An angular-turn actuator has precise angle control capabilities and can achieve accurate movement within a given angle range. It is widely used in various valve control devices.

[0003] However, in some application scenarios, there is a risk of malfunction of the angular-turn actuator, which may cause the valve to open or close unexpectedly, thus affecting the safety and stability of the equipment. Therefore, for some angular-turn actuators with special requirements, a position locking function needs to be set. Utility Model Content

[0004] In order to improve the safety and stability of the angular travel actuator, the utility model provides a locking type angular travel actuator.

[0005] The technical solution adopted by the utility model is as follows: a locking type angular stroke actuator, comprising: a main oil cylinder and a main piston arranged in pairs, the main oil cylinder having a first oil inlet and a first oil return port; a rack fixed to the rod body of the main piston; a gear, which cooperates with the rack in transmission and serves as an external execution component; a locking oil cylinder and a locking piston arranged in pairs, the locking oil cylinder having a second oil inlet and a second oil return port; a locking member and a locking shaft, which are respectively fixed to the main piston and the rod body of the locking piston; the locking shaft moves axially with the locking piston, and has two states of being locked and separated from the locking member. When the locking shaft is locked with the locking member, the main piston is locked.

[0006] Preferably, the main piston and the locking piston are arranged at an angle of 90°.

[0007] Preferably, when the main piston is locked, it is located in the fully open position or the fully closed position.

[0008] Preferably, it also includes: a main box body, which serves as an installation space for the main piston, the rack and the gear; and a guide seat, which is installed on the main box body and cooperates with the axial guide groove of the rod body of the main piston.

[0009] Preferably, it also includes: a cam, which rotates coaxially with the gear; and a first position switch, which is installed on the main box body and cooperates with the cam to obtain the angular position signal of the gear.

[0010] Preferably, it further comprises: a locking box body, which serves as an installation space for the locking piston and the locking shaft; and a limiting rod, which is positionally adjustable and mounted on the locking box body, and abuts against the end of the locking member to serve as an ultimate limit.

[0011] Preferably, it also includes: a stroke slider, which slides linearly with the locking piston; a second position switch, which is installed on the locking box and cooperates with the stroke slider to obtain the position signal of the locking piston.

[0012] Preferably, the locking piece is detachably mounted on the end of the main piston, and comprises: a mounting section having an internal thread assembled with the main piston; a limiting section having an external thread, a diameter smaller than that of the mounting section, and a step surface; a locking nut mounted on the limiting section; the gap between the inner end surface of the locking nut and the step surface forms an insertion space for the locking shaft.

[0013] The utility model has the following beneficial effects: the angular stroke actuator of the utility model has a position locking function. By locking the oil cylinder and the locking piston, the locking shaft and the locking piece work in coordination to ensure that the main piston is firmly locked when the angular stroke actuator is in the fully open position or the fully closed position, preventing the occurrence of malfunctions, thereby improving the safety and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model (fully closed position).

[0015] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the utility model (fully open position).

[0016] Figure 3 It is a cross-sectional schematic diagram at CC in an embodiment of the present utility model.

[0017] Figure 4 Schematic diagram of the locking member in the embodiment of the present utility model.

[0018] Main oil cylinder 1; main piston 2; rack 3; gear 4; locking oil cylinder 5; locking piston 6; locking member 7, mounting section 701, limiting section 702, step surface 703, locking nut 704; locking shaft 8; main housing 9; guide seat 10; cam 11; first position switch 12; locking housing 13; limiting rod 14; travel slider 15; second position switch 16.

[0019] The first oil inlet A1; the first oil return port B1; the second oil inlet A2; the second oil return port B2. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the embodiments and drawings.

[0021] In the embodiment, Figures 1 to 4 As shown, it is an angular stroke actuator dedicated to hydraulic control valves and having a locking function in the fully closed position, comprising: a main oil cylinder 1 and a main piston 2 arranged in pairs, the main oil cylinder 1 having a first oil inlet A1 and a first oil return port B1; a rack 3, fixed to the rod body of the main piston 2; a gear 4, drivingly matched with the rack 3, as an external execution component; a locking oil cylinder 5 and a locking piston 6 arranged in pairs, the locking oil cylinder 5 having a second oil inlet A2 and a second oil return port B2; a locking member 7 and a locking shaft 8, respectively fixed to the rod bodies of the main piston 2 and the locking piston 6; the locking shaft 8 moves axially with the locking piston 6, and has two states of locking and separation with the locking member 7. When the locking shaft 8 is locked with the locking member 7, the main piston 2 is locked. The angular stroke actuator of this embodiment has a position locking function. By locking the oil cylinder 5 and the locking piston 6, the locking shaft 8 and the locking member 7 work in coordination, which can ensure that the main piston 2 is firmly locked when the angular stroke actuator is in the fully closed position, preventing the occurrence of malfunctions, thereby improving the safety and stability of the equipment.

[0022] In the embodiment, Figure 1 , 2 As shown, the main piston 2 and the locking piston 6 are arranged at an angle of 90°. This structural design can effectively improve the matching accuracy between the locking shaft 8 and the locking member 7, and ensure that the locking shaft 8 is stably locked.

[0023] In the embodiment, Figures 1 to 3 As shown, it also includes: a main box body 9, which serves as an installation space for the main piston 2, the rack 3 and the gear 4; a guide seat 10, which is installed on the main box body 9 and cooperates with the axial guide groove of the rod body of the main piston 2. The guide seat 10 of this embodiment limits the main piston 2 and the rack 3 in the circumferential direction, ensuring that the two can accurately achieve axial sliding and avoid movement in other directions.

[0024] In the embodiment, Figure 3 As shown, it also includes: a cam 11, which rotates coaxially with the gear 4; a first position switch 12, which is installed on the main box 9 and cooperates with the cam 11 to obtain the angular position signal of the gear 4. The first position switch 12 adopts a travel switch, and through the inductive linkage of the cam 11 and the travel switch, the angular position of the gear 4 is accurately detected, so that the operator can obtain the working status information of the actuator in time, and improve the monitoring and management efficiency of the equipment.

[0025] In the embodiment, Figures 1 to 3As shown, it also includes: a locking box 13, which serves as an installation space for the locking piston 6 and the locking shaft 8; a limiting rod 14, which is installed on the locking box 13 with an adjustable position, and abuts against the end of the locking member 7 to limit the position. The limiting rod 14 plays a role of safety and limiting the locking member 7, i.e., the main piston 2, and can also share part of the force on the locking shaft 8, so as to avoid deformation and leakage caused by excessive radial force on the locking piston 6.

[0026] In the embodiment, Figure 1 , 2 As shown, it also includes: a travel slider 15, which moves linearly with the locking piston 6; a second position switch 16, which is installed on the locking box 13 and cooperates with the travel slider 15 to obtain the position signal of the locking piston 6. The second position switch 16 adopts a proximity switch, and with the cooperation of the proximity switch and the travel slider 15, the position signal of the locking piston 6 can be accurately obtained, which further enhances the monitoring and control capabilities of the actuator position and ensures the normal operation and safe operation of the equipment.

[0027] In the embodiment, Figure 4 As shown, the locking member 7 is detachably mounted on the end of the main piston 2, and includes: a mounting section 701, which has an internal thread assembled with the main piston 2; a limiting section 702, which has an external thread, a diameter smaller than the mounting section 701, and a step surface 703; a locking nut 704, which is mounted on the limiting section 702; the gap between the inner end surface of the locking nut 704 and the step surface 703 forms a plug-in space for the locking shaft 8. This type of locking member 7 has the advantages of easy installation and debugging, and is also convenient for later inspection and maintenance.

[0028] Next, combine Figure 1 , 2 , the operating processes of this embodiment are described as follows.

[0029] 1. The actuator switches from the fully closed position to the fully open position:

[0030] Step 1.1: Before the main oil cylinder 1 is actuated, the locking oil cylinder 5 is first locked and exited, that is, the second oil return port B2 of the locking oil cylinder 5 is supplied with oil, and the second oil inlet port A2 is returned with oil. At this time, the locking piston 6 is retracted, driving the travel slider 15 to move. When the travel slider 15 moves to the second position, the "exit switch" in the switch 16 is closed, and the main oil cylinder 1 can be actuated;

[0031] Step 1.2: Oil enters the first oil return port B1 of the master cylinder 1, and oil returns to the first oil inlet A1. The master piston 2 retracts, and the rod of the master piston 2 drives the rack 3, driving the gear 4 to make a counterclockwise rotation until the master piston 2 retracts to its position and presses the first position switch 12 to send a fully open signal, that is, the actuator is in Figure 1 Fully open position shown;

[0032] 2. The actuator switches from fully open to fully closed:

[0033] Step 2.1: When the main oil cylinder 1 extends, the locking oil cylinder 5 must also be locked and withdrawn first, that is, the second oil return port B2 of the locking oil cylinder 5 is supplied with oil, and the second oil inlet port A2 is returned with oil. At this time, the locking piston 6 retreats, driving the travel slider 15 to move. When the travel slider 15 moves to the second position, the "withdrawal switch" in the switch 16 is closed, and the main oil cylinder 1 can then move;

[0034] Step 2.2: Oil enters the first oil inlet A1 of the master cylinder 1, and oil returns from the first oil return port B1. The master cylinder 1 extends, and the rod of the master piston 2 drives the rack 3, driving the gear 4 to rotate clockwise until the master piston 2 extends to the position, and presses the first position switch 12 to send a full-close signal;

[0035] Step 2.3: The second oil inlet A2 of the locking cylinder 5 is supplied with oil, and the second oil return port B2 is used to return oil. The locking cylinder 5 is put into motion, driving the travel slider 15 to move. When the travel slider 15 moves to the second position, the "put-in switch" in the switch 16 is closed, and the main cylinder 1 and the locking cylinder 5 both move to the position and stop, that is, the actuator is in Figure 2 The fully closed position shown ensures that the actuator is safe and reliable in the fully closed position, avoids false operation, and ensures safe operation of the valve.

[0036] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A locking type angular stroke actuator, characterized in that: include: A master oil cylinder (1) and a master piston (2) are arranged in pairs, wherein the master oil cylinder (1) has a first oil inlet (A1) and a first oil return port (B1); A rack (3) fixed to the rod body of the main piston (2); A gear (4) is coupled with the rack (3) in transmission and serves as an external execution component; A locking oil cylinder (5) and a locking piston (6) arranged in pairs, wherein the locking oil cylinder (5) has a second oil inlet (A2) and a second oil return port (B2); The locking member (7) and the locking shaft (8) are respectively fixed to the main piston (2) and the rod body of the locking piston (6); The locking shaft (8) moves axially with the locking piston (6) and has two states: locked with the locking member (7) and separated. When the locking shaft (8) is locked with the locking member (7), the main piston (2) is locked.

2. The locking type angular stroke actuator according to claim 1, characterized in that: The main piston (2) and the locking piston (6) are arranged at an angle of 90°.

3. The locking type angular stroke actuator according to claim 1, characterized in that: When the main piston (2) is locked, it is in a fully open position or a fully closed position.

4. The locking type angular stroke actuator according to claim 1, characterized in that: Also includes: A main box (9) serving as a mounting space for the main piston (2), the rack (3) and the gear (4); The guide seat (10) is mounted on the main box body (9) and cooperates with the axial guide groove of the rod body of the main piston (2).

5. The locking type angular stroke actuator according to claim 4, characterized in that: Also includes: A cam (11) is coaxially rotated with the gear (4); A first position switch (12) is mounted on the main housing (9) and cooperates with the cam (11) to obtain a rotation angle position signal of the gear (4).

6. The locking type angular stroke actuator according to claim 1, characterized in that: Also includes: A locking box (13) serving as an installation space for the locking piston (6) and the locking shaft (8); A limit rod (14) is mounted on the locking box (13) in an adjustable position and abuts against the end of the locking member (7) to provide an ultimate limit.

7. The locking type angular stroke actuator according to claim 6, characterized in that: Also includes: A travel slider (15) is linked with the locking piston (6) in a linear sliding motion; A second position switch (16) is mounted on the locking box (13) and cooperates with the travel slider (15) to obtain a position signal of the locking piston (6).

8. The locking type angular stroke actuator according to claim 1, characterized in that: The locking member (7) is detachably mounted on the end of the main piston (2), and comprises: A mounting section (701) having an internal thread for assembly with the main piston (2); The limiting section (702) has an external thread, a diameter smaller than that of the installation section (701), and is provided with a step surface (703); A locking nut (704) mounted on the limiting section (702); The gap between the inner end surface of the locking nut (704) and the step surface (703) forms an insertion space for the locking shaft (8).

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