Actuating mechanism

Abstract

The utility model relates to the field of fire fighting, in particular to an actuating mechanism with higher fire extinguishing efficiency, which is characterized in that a plug body component and a rod body are connected or integrated, the plug body component can slide along the inner wall of a shell, a medium channel and a cavity are isolated, a medium outlet of the medium channel is positioned on the rod body and positioned outside the cavity, and in the moving process of the plug body, the plug body component can slide along the inner wall of the shell. The plug body drives the rod body to move, the position of the medium outlet can be closer to the center area where fire breaks out, and the efficiency of fire extinguishing operation is improved.

Description

Technical Field

[0001] This utility model relates to the field of fire protection, and in particular to an actuator. Background Technology

[0002] During firefighting operations, firefighters need to spray fire extinguishing agents onto the fire site to put it out. In cases where the fire is large, firefighters need to spray the fire extinguishing agents onto the fire site as soon as they arrive at the scene in order to control the fire as quickly as possible.

[0003] In one technology, for example, the firefighting medium can be water. Firefighters need to hold water guns and spray water to designated locations to carry out firefighting operations. However, when the fire is large, firefighters holding water guns need to start firefighting from the periphery of the fire area. The nozzles of the water guns cannot reach the central area of ​​the large fire in time, and the efficiency of the operation needs to be improved. Utility Model Content

[0004] This utility model provides an actuator to solve the above problems:

[0005] An actuator includes a housing and a moving component. The moving component includes a plug assembly and a rod, which are connected or integrally formed. The actuator includes a cavity and a medium channel. The wall of the cavity includes a portion of the inner wall of the housing and a portion of the wall of the moving component. The plug assembly is slidable along the inner wall of the housing. The medium channel and the cavity are isolated from each other. The medium outlet of the medium channel is located on the rod and outside the cavity.

[0006] Such an actuator, with a plug assembly and a rod connected or integrated, allows the plug assembly to slide along the inner wall of the housing. The medium channel and the cavity are isolated. The medium outlet of the medium channel is located on the rod and outside the cavity. During the movement of the plug, the plug drives the rod to move, so that the position of the medium outlet can be moved away from the housing, that is, the position of the medium outlet can be closer to the center of the fire, thus improving the efficiency of fire extinguishing operations. Attached Figure Description

[0007] Figure 1 This is a schematic cross-sectional view of the actuator in one embodiment;

[0008] Figure 2 for Figure 1 An enlarged view of area A in the overall schematic diagram of the central actuator;

[0009] Figure 3 for Figure 1 An enlarged view of area B in the overall schematic diagram of the central actuator;

[0010] Figure 4This is a schematic cross-sectional view of the actuator in another embodiment.

[0011] Figure label:

[0012] The shell 1, main body 11, first end portion 12, fourth hole 121, mating portion 122, first end portion 1221, second end portion 1222, second end portion 13, and third hole 131;

[0013] Moving component 2, plug assembly 21, piston head 20, first sealing part 011, first hole 211, rod 22, fifth hole 221, fifth end 222, sixth end 223, second hole 225, impact part 226;

[0014] Cavity 3; First channel 4; Second channel 5; Medium channel 6, First port 61, Second port 62;

[0015] Conveying section 7, third channel 71, first trough 72, second trough 73, third end 74, fourth end 75;

[0016] First retaining ring 8, second retaining ring 9, support sleeve 010, hole 012, connecting channel 013. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] The technical solution of the specific embodiments is described below with reference to the accompanying drawings:

[0019] In this utility model, see Figures 1-3 The actuator includes a housing 1 and a moving component 2. The moving component 2 includes a plug component 21 and a rod 22. The plug component 21 and the rod 22 are connected or are an integral structure. The actuator includes a cavity 3. The wall of the cavity 3 includes a portion of the inner wall of the housing 1 and a portion of the wall of the moving component 2. The plug component 21 can slide along the inner wall of the housing 1.

[0020] Specifically, the plug assembly includes a piston head and a first sealing part 011. The first sealing part and the piston head are positioned to limit each other, and the first sealing part is located between the wall of the piston head and the inner wall of the housing. The actuator includes a first channel 4 and a second channel 5, which are respectively connected to the cavity 3. The first channel 4 and the second channel 5 can be air passages. During the movement of the plug assembly 21, the first sealing part 011 slides against the inner wall of the housing 1 to seal the gap between the piston head and the inner wall of the housing 1. The first sealing part 011 isolates the first channel connected to the cavity 3. 4 and second channel 5; defined, the first direction is the direction in which the length of the rod 22 extending out of the shell 1 gradually increases during the movement of the plug assembly 21; gas enters the cavity 3 through the first channel 4, acts on one side of the plug assembly 21, and pushes the plug assembly 21 to move in the first direction, while the gas on the other side of the plug assembly 21 is discharged out of the cavity 3 through the second channel 5; gas enters the cavity 3 through the second channel 5, acts on one side of the plug assembly 21, and pushes the plug assembly 21 to move in the opposite direction of the first direction, while the gas on the other side of the plug assembly 21 is discharged out of the cavity 3 through the first channel 4.

[0021] It should be noted that: cavity 3 is a region enclosed by multiple walls. The walls corresponding to cavity 3 include the inner wall of housing 1 and the wall of moving component 2. The sealing between cavity 3 and the outside of housing is achieved by a sealing component.

[0022] An actuator includes a housing and a moving component. The moving component includes a plug assembly and a rod, which are connected or integrally formed. The actuator includes a cavity and a medium channel. The wall of the cavity includes a portion of the inner wall of the housing and a portion of the wall of the moving component. The plug assembly is slidable along the inner wall of the housing. The medium channel and the cavity are isolated from each other. The medium outlet of the medium channel is located on the rod and outside the cavity.

[0023] Such an actuator, with a plug assembly and a rod connected or integrated, allows the plug assembly to slide along the inner wall of the housing. The medium channel and cavity are isolated, and the medium outlet of the medium channel is located on the rod and outside the cavity. During the movement of the plug, the plug drives the rod to move. Compared with the prior art, this allows the medium outlet to be located closer to the center of the fire, improving the efficiency of firefighting operations.

[0024] In one embodiment, reference Figures 1-3 The housing 1 includes a main body 11, the inner wall of which extends along the extending direction of the plug assembly 21. The plug assembly 21 is located inside the main body 11 and is slidable along the inner wall of the housing 1. The portion of the wall corresponding to the medium channel 6 is located inside the main body 11. This facilitates the miniaturization of the actuator.

[0025] Specifically, the housing 1 includes a main body 11, the inner wall of the main body 11 extends along the moving direction of the plug assembly 21, the plug assembly 21 is located inside the main body 11, the plug assembly 21 includes a piston head and a first sealing part 011, the first sealing part and the piston head are limited and positioned, along the radial direction of the plug assembly 21, the first sealing part is located between the wall of the piston head and the inner wall of the main body 11, during the movement of the plug assembly 21, the first sealing part 011 and the inner wall of the main body 11 slide together to seal the gap between the piston head and the main body 11, the first sealing part 011 isolates the first channel 4 and the second channel 5 that are respectively connected to the cavity 3.

[0026] The housing 1 also includes a first end 12 and a second end 13, which can be covers. In the moving direction of the plug assembly 21, they are located at both ends of the main body 11, respectively. Specifically, the second end 13 is located in the first direction of the first end 12. Along the moving direction of the plug assembly 21, the plug assembly 21 can move closer to or away from the first end 12, and the plug assembly 21 can move closer to or away from the second end 13. In this embodiment, the first end 12 and the main body 11 are separate structures, and the second end 13 and the main body 11 are separate structures. The first end 12 and the main body 11 are limited or fixed, and the second end 13 and the main body 11 are limited or fixed. In other embodiments, one of the first end 12 and the second end 13 is integral with the main body 11, and the other of the first end 12 and the second end 13 is a separate mechanism from the main body 11. This will not be elaborated here.

[0027] The second end 13 has a third hole 131. Along the extension direction of the rod 22, one end of the rod 22 is connected to or integrally formed with the plug assembly 21. A portion of the rod 22 is located in the third hole 131, and the wall portion corresponding to the third hole 131 provides support for the rod 22. The wall portion corresponding to the third hole 131 and the rod 22 can be in direct contact, i.e., the wall portion corresponding to the third hole 131 provides support for the rod 22; or the wall portion corresponding to the third hole 131 and the rod 22 can be in indirect contact. For example, the actuator includes a support sleeve 010, which is located between the outer wall of the rod 22 and the inner wall of the third hole 131. In this case, the inner wall of the third hole 131 indirectly provides support for the rod 22.

[0028] Of course, the support sleeve 010 can also reduce friction and improve wear resistance. For example, in the field of fire protection, to meet performance requirements, the rod 22 needs to extend a considerable distance from the housing 1 during the movement of the plug assembly 21, resulting in a larger wear area for the rod 22 and necessitating improved wear resistance. For instance, the support sleeve 010 and the wall corresponding to the third hole 131 are designed to limit the movement of the rod 22 through the support sleeve 010. During the movement of the plug assembly 21, the inner wall of the support sleeve 010 and the rod 22 slide against each other. More specifically, the support sleeve 010 is made of wear-resistant materials, such as graphite, which contacts the outer wall of the rod 22, thus improving wear resistance.

[0029] The first end portion 12 has a fourth hole 121. The actuator includes a conveying part 7, a portion of which is located in the fourth hole 121. The wall portion corresponding to the fourth hole 121 provides support for the conveying part 7. Specifically, the first end portion 12 includes a mating part 122, with the fourth hole 121 located within it. The conveying part 7 and the mating part 122 are mutually restrictive. More specifically, the fourth hole 121 is a through hole. The mating part 122 includes a first end portion 1221. Along the moving direction of the plug assembly 21, the first end portion 1221 is located on the side of the mating part 122 away from the plug assembly 21. The conveying part 7 has a first groove 72. The actuator includes a first retaining spring 8, which is located within the first groove 72 and abuts against the first end portion 1221. This restricts the degree of freedom of the conveying part 7 in one direction of the moving direction of the plug assembly 21. More specifically, the mating part 122 includes a second end portion 1222 located on the side of the mating part 122 closer to the plug assembly 21. The conveying part 7 has a second groove 73. The actuator includes a second retaining ring 9, which is located in the second groove 73 and abuts against the second end portion 1222. Along the moving direction of the plug assembly 21, at least a portion of the mating part 122 is located between the first retaining ring 8 and the second retaining ring 9. This restricts the degree of freedom of the conveying part 7 in another direction of the moving direction of the plug assembly 21, thus achieving a limiting setting between the conveying part 7 and the first end portion 12. A seal (not shown in the figure) is provided between the conveying part 7 and the wall portion corresponding to the fourth hole 121. This achieves a static seal between the first end portion 12 and the conveying part 7, resulting in a better sealing effect between the cavity 3 and the external space of the housing.

[0030] The moving component 2 includes a hole 012, at least a portion of which corresponds to the inner wall of the hole 012 extends along the moving direction of the plug assembly 21. At least a portion of the conveying part 7 is located in the hole corresponding to the hole 012 and extends along the moving direction of the plug assembly 21. At least a portion of the conveying part 7 and the inner wall corresponding to the hole 012 provide support and cooperation. Thus, the conveying part 7 provides support for the inner wall of the hole 012, i.e., the conveying part 7 provides support for the plug assembly 21. The conveying part 7 has a third channel 71, which is connected to the hole corresponding to the hole 012. The medium channel 6 includes the portion of the third channel 71 and the hole corresponding to the hole 012. The medium in the medium channel 6 passes through the medium channel 6, i.e., at least a portion of the third channel 71 and the hole corresponding to the hole 012. Thus, at least a portion of the wall corresponding to the medium channel 6 is located inside the main body 11, which is beneficial for miniaturization of the actuator.

[0031] In the direction of movement of the plug assembly 21, there are a first stroke position and a second stroke position. The dimension of the extension direction of the rod 22 is the length dimension. It is defined that when the rod 22 is in the first stroke position, the length dimension of the part of the rod 22 outside the cavity 3 is the largest, and when the rod 22 is in the second stroke position, the length dimension of the rod 22 outside the cavity 3 is the smallest. The holes corresponding to the orifice include a first hole 211 and a second hole 225. The inner walls of the first hole 211 and the second hole 225 extend along the moving direction of the plug assembly 21. The first hole 211 is located in the plug assembly 21, and the second hole 225 is located in the rod 22. The first hole 211 and the second hole 225 are connected. More specifically, the first hole 211 is a through hole. The conveying part 7 passes through the first hole 211. When the rod 22 is in the second stroke position, part of the conveying part 7 is located in the second hole 225. Along the moving direction of the plug assembly 21, one end of the conveying part 7 is located in the second hole 225. The conveying part 7 provides support for part of the rod 22. If the length dimension of the rod 22 is too large, the rod 22 will deform under the action of gravity. The conveying part 7 provides support for the rod 22, reduces the deformation of the rod 22, and improves the smoothness of the moving assembly 2 during the movement process.

[0032] When the piston head 20 and the rod 22 are separate structures, a seal (not shown in the figure) is required between the piston head and the rod, and a seal (not shown in the figure) is required between the piston head and the conveying part. If so, the sealing between the medium channel and the cavity 3 is guaranteed.

[0033] Furthermore, when the rod 22 is in the second stroke position, part of the conveying part 7 is located inside the second hole 225. Part of the rod 22 and part of the conveying part 7 are stacked in the thickness direction of the rod 22. The conveying part 7 and the housing 1 are limited. Part of the conveying part 7 is located outside the second hole 225. The conveying part 7 and the housing 1 are limited. During the movement of the rod 22 from the second stroke position to the first stroke position, the rod 22 and the conveying part 7 move relative to each other in the moving direction of the plug assembly 21. The length dimension of the rod 22 outside the cavity 3 increases, and the length dimension of the stacked part of the rod 22 and the conveying part 7 in the thickness direction of the rod 22 decreases. The length dimension of the medium channel 6 increases, and the medium has a longer medium channel, making it easier to transport the fire-fighting medium to the center of the fire area and more conducive to transporting the medium to the designated location.

[0034] The medium channel 6 includes a first port 61 and a second port 62, which are interconnected. The first port 61 is located in the conveying section 7, and the second port 62 is located in the rod body 22 and outside the cavity 3. Specifically, the second hole 225 is a through hole, and the wall corresponding to the second hole 225 extends along the moving direction of the plug assembly 21. The rod body 22 is a hollow tube. The conveying section 7 has a third channel 71, which is a through hole. The first port 61 and the second port 62 are the ports of the medium channel 6. Specifically, the second port is the medium outlet. The medium enters the medium channel 6 from the first port 61 and flows out of the medium channel 6 from the second port 62. Along the moving direction of the plug assembly 21, the conveying part 7 has a third end 74 and a fourth end 75. The fourth end 75 is closer to the sixth end 223 than the third end 74. The sixth end 223 is located in the first direction of the fifth end 222, and the fourth end 75 is located in the first direction of the third end 74. The first port 61 is located at the third end 74, and the second port 62 is located at the sixth end 223. This maximizes the utilization of the wall portion corresponding to the third channel on the rod 22.

[0035] More specifically, the moving component includes an impact portion. Along the moving direction of the plug assembly 21, the rod has a fifth end 222 and a sixth end 223. The plug assembly 21 and the fifth end 222 are connected or integrally formed. The impact portion 226 and the sixth end 223 are connected or integrally formed. The impact portion includes a fifth hole 221, which communicates with the outside of the actuator. The fifth hole 221 is connected to a second port 62. Thus, after the impact portion 226 breaks through the obstruction, the medium passes through the medium channel 6 and the fifth hole 221 to the outside of the actuator.

[0036] Such an actuator, through the connection or integral structure of the impact part and the sixth end, and the connection or integral structure of the plug assembly and the fifth end, the plug assembly can slide along the inner wall of the shell, so that the plug assembly drives the rod and the impact part to move. The impact part is located outside the cavity, so that the impact part can destroy distant obstacles. Furthermore, through the actuator including the medium channel, at least a part of the wall corresponding to the medium channel is limited or fixed to the shell. Compared with the prior art, this reduces the operation of handheld water gun operators, improves the personnel utilization rate of fire scene operations, and improves fire extinguishing efficiency.

[0037] Furthermore, through the connection or integral structure of the impact part 226 and the sixth end 223, the second port 62 is located at the sixth end 223. The second port is a port of the third channel. During the process of the plug assembly moving from the second stroke position to the first stroke position, the impact part destroys the obstruction in the process. When the plug assembly is in the first stroke position, the impact part is closer to the fire source, and the port of the third channel is closer to the fire source. At this time, by maintaining the position of the plug assembly, the medium passes through the third channel and directly enters the space corresponding to the impact part. It then passes through the fifth hole to the outside of the actuator to carry out the operation, which can better ensure that the medium is sprayed to the designated location and realize the fire fighting operation.

[0038] In one embodiment, see Figure 4 The housing 1 includes a main body 11, the inner wall of the main body 11 extends along the moving direction of the plug assembly 21, the plug assembly 21 is located inside the main body 11 and the plug assembly 21 is slidable along the inner wall of the main body 11, and at least a portion of the wall corresponding to the medium channel 6 is located outside the main body 11.

[0039] The portion of the wall corresponding to the medium channel 6 is placed inside the main body 11. A sealing component must be provided between the wall corresponding to the medium channel 6 and the wall corresponding to the cavity 3 to achieve isolation between the medium channel 6 and the cavity 3. In this embodiment, the portion of the wall corresponding to the medium channel 6 is located outside the main body 11, eliminating the risk of leakage between the medium channel 6 and the cavity 3, and making the structure more stable.

[0040] More specifically, the wall of the medium channel 6 can be tubular, and the outlet of the medium channel 6 is located on the rod outside the cavity. The wall of the medium channel and the rod can be fixed or limited, such as by welding or threaded connection. During the movement of the plug assembly, the wall of the medium channel can be driven by the rod to move to a position close to the center of the fire source, thereby improving work efficiency.

[0041] The moving component includes an impact part 226, which is connected to or integrally formed with a sixth end 223. Along the moving direction of the plug assembly 21, the rod has a fifth end 222 and a sixth end 223. The plug assembly 21 and the fifth end 222 are connected to or integrally formed with each other. The impact part 226 and the sixth end 223 are connected to or integrally formed with each other. The impact part includes a fifth hole 221, which is externally connected to the actuator and to the medium outlet of the medium channel. Specifically, the medium outlet of the medium channel and the fifth hole are connected through a connecting channel on the rod. One port of the connecting channel 013 is located at the sixth end 223. The impact part destroys the obstructing object, so that the position of the medium outlet can be closer to the center of the fire, thereby improving the efficiency of the fire extinguishing operation.

Claims

1. An actuator, characterized by The actuating mechanism comprises a housing (1) and a moving assembly (2), the moving assembly (2) comprises a plug assembly (21) and a rod (22), the plug assembly (21) and the rod (22) are connected or integrated, the actuating mechanism comprises a cavity (3) and a medium channel (6), the corresponding wall of the cavity (3) comprises part of the inner wall of the housing (1) and part of the wall of the moving assembly (2), the plug assembly (21) can slide along the inner wall of the housing (1), the medium channel (6) and the cavity (3) are isolated, the medium outlet of the medium channel (6) is located at the rod (22) and outside the cavity (3).

2. The actuator of claim 1, wherein, The housing (1) comprises a main body (11), the inner wall of the main body (11) extends along the moving direction of the plug assembly (21), the plug assembly (21) is located inside the main body (11), and the plug assembly (21) can slide along the inner wall of the main body (11), at least part of the corresponding wall of the medium channel (6) is located inside the main body (11).

3. An actuator according to claim 1 or 2, c h a r a c t e r i z e d in that The moving assembly (2) comprises a hole part (012), at least part of the corresponding inner wall of the hole part (012) extends along the moving direction of the plug assembly (21), the actuating mechanism comprises a conveying part (7), part of the conveying part (7) is located in the corresponding hole of the hole part (012) and extends along the moving direction of the plug assembly (21), the conveying part (7) has a third channel (71), the third channel (71) and the corresponding hole of the hole part (012) are in communication, the medium channel (6) comprises part of the third channel (71) and the corresponding hole of the hole part (012).

4. The actuator of claim 3, wherein, The medium channel (6) comprises a first port (61) and a second port (62), the first port (61) and the second port (62) are two ports of the medium channel (6), the first port (61) is located at the conveying part (7), the second port (62) is located at the rod (22), and the second port (62) is located outside the cavity (3).

5. The actuator of claim 4, wherein, The conveying part (7) extends along the moving direction of the plug assembly (21), the conveying part (7) has a third end (74) and a fourth end (75), the rod has a sixth end (223), the fourth end (75) is closer to the sixth end (223) relative to the third end (74), the first port (61) is located at the third end (74), and the second port (62) is located at the sixth end (223).

6. An actuator according to claim 4 or 5, wherein, The moving assembly includes an impact part, the rod body has a fifth end (222) and a sixth end (223) along the moving direction of the plug body assembly (21), the plug body assembly (21) and the fifth end (222) are connected or integrated, the impact part (226) and the sixth end (223) are connected or integrated, the impact part (226) includes a fifth hole (221), the fifth hole (221) and the outside of the actuating mechanism are communicated, and the fifth hole (221) and the second hole (62) are communicated.

7. The actuator of claim 3, wherein, The shell (1) includes a first end (12), the plug body assembly (21) can be close to or away from the first end (12) along the moving direction of the plug body assembly (21), the first end (12) has a fourth hole (121), part of the conveying part (7) is located in the fourth hole (121), and the first end (12) and the conveying part (7) are limitingly arranged.

8. The actuator of claim 4, wherein, The shell (1) includes a first end (12), the plug body assembly (21) can be close to or away from the first end (12) along the moving direction of the plug body assembly (21), the first end (12) has a fourth hole (121), part of the conveying part (7) is located in the fourth hole (121), and the first end (12) and the conveying part (7) are limitingly arranged.

9. The actuator of claim 7, wherein, The first end (12) includes a matching part (122), the fourth hole (121) is located in the matching part (122), the conveying part (7) and the matching part (122) are limitingly arranged, the matching part (122) includes a first end face part (1221), the first end face part (1221) is located on the side, away from the plug body assembly (21), of the matching part (122) along the moving direction of the plug body assembly (21), the conveying part (7) has a first groove part (72), the actuating mechanism includes a first snap spring (8), the first snap spring (8) is limitingly arranged in the first groove part (72), and the first snap spring (8) and the first end face part (1221) are in abutment.

10. The actuator of claim 3, wherein, The hole part (012) corresponds to a hole including a first hole (211) and a second hole (225), the first hole (211) and the second hole (225) correspond to the inner wall extending along the moving direction of the plug body assembly (21), the first hole (211) is located in the plug body assembly (21), and the second hole (225) is located in the rod body (22); when the rod body (22) is located at the second stroke position, part of the delivery part (7) is located in the second hole (225), the part of the rod body (22) and the part of the delivery part (7) are arranged in a telescopic manner in the thickness direction of the rod body (22), and the delivery part (7) and the shell (1) are limitingly arranged.

11. The actuator of claim 6, wherein, The hole part (012) corresponds to a hole including a first hole (211) and a second hole (225), the first hole (211) and the second hole (225) correspond to the inner wall extending along the moving direction of the plug body assembly (21), the first hole (211) is located in the plug body assembly (21), and the second hole (225) is located in the rod body (22); when the rod body (22) is located at the second stroke position, part of the delivery part (7) is located in the second hole (225), the part of the rod body (22) and the part of the delivery part (7) are arranged in a telescopic manner in the thickness direction of the rod body (22), and the delivery part (7) and the shell (1) are limitingly arranged.

12. An actuator according to any one of claims 4 to 5, 7 to 9, wherein, The plug body assembly (21) has a first stroke position and a second stroke position along the moving direction of the plug body assembly (21), the moving direction of the plug body assembly (21) is the length direction, when the rod body (22) is located at the second stroke position, the length direction size of the part of the rod body (22) located outside the cavity (3) is the smallest, when the rod body (22) is located at the first stroke position, the length size of the part of the rod body (22) located outside the cavity (3) is the largest, the hole part (012) corresponds to a hole, the hole includes a first hole (211) and a second hole (225), the inner walls corresponding to the first hole (211) and the second hole (225) extend along the moving direction of the plug body assembly (21), the first hole (211) is located at the plug body assembly (21), the second hole (225) is located at the rod body (22), when the rod body (22) is located at the second stroke position, the part of the conveying part (7) is located at the second hole (225), the part of the rod body (22) and the part of the conveying part (7) are arranged in a telescopic manner in the thickness direction of the rod body (22), and the conveying part (7) and the shell (1) are limitingly arranged.

13. The actuator of claim 1, wherein, The shell (1) includes a main body part (11), the inner wall of the main body part (11) extends along the extension direction of the plug body assembly (21), the plug body assembly (21) is located at the inner side of the main body part (11), and the plug body assembly (21) can slide along the inner wall of the main body part (11), and the wall part corresponding to the medium channel (6) is located at the outer side of the main body part (11).

Images