Pneumatic control device and injector

Abstract

The invention provides an air control device which comprises an air storage tank, a switch assembly and a control assembly, compressed air is stored in the air storage tank, and an air outlet is formed in the air storage tank; the switch assembly is arranged on the air storage tank and is opposite to the air outlet; the control assembly is connected with the switch assembly and controls the working state of the switch assembly in a timing mode, and therefore the compressed gas is controlled to be discharged outwards from the gas outlet. According to the pneumatic control device provided by the invention, the switch assembly and the control assembly which are matched with each other are arranged on the gas storage tank, so that compressed gas can be released in a timed and quantitative manner, and thus balanced and stable output is provided. The invention further provides an injector.

Description

[Technical field]

[0001] The invention relates to the field of automatic control technology, and in particular to a gas control device and an injector. [Background technology]

[0002] Compressed gas is often used in both industrial production and daily life. For example, in daily life, there are gas tanks, hydrogen tanks for blowing balloons, and oxygen tanks for breathing. In industrial production, there are a large number of mechanical equipment that require pressure to push. By releasing the compressed gas in the high-pressure gas tank, force transmission is achieved. Among them, the injector is a more common example of using compressed gas to push. By releasing the gas to push the injection, the potential energy is converted into kinetic energy, and the material in the injector is pushed outward.

[0003] The existing technology mainly releases compressed gas by setting a fixed switch through manual or electric control. When it needs to be closed, it needs to be operated again. The speed and volume of the release cannot be accurately controlled. In addition, the manual control method is very inconvenient and requires operators to pay attention at all times and control multiple times, which increases labor costs. [Summary of the invention]

[0004] The present invention provides an air control device and an injector for solving the above-mentioned problems of inconvenient operation and difficult control.

[0005] The present invention provides a gas control device, comprising a gas storage tank, a switch assembly and a control assembly, wherein the gas storage tank stores compressed gas and is provided with a gas outlet; the switch assembly is arranged on the gas storage tank and is arranged relative to the gas outlet; the control assembly is connected to the switch assembly and controls the working state of the switch assembly at a fixed time, thereby controlling the compressed gas to be discharged outward from the gas outlet.

[0006] The present invention also provides an injector, comprising a shell, a movable component, and an air control device, wherein a discharge port is opened on one side of the shell; the movable component is arranged in the shell and is sealed against the inner wall of the shell, and a storage cavity and an air control cavity are respectively arranged on both sides of the movable component; the air control device is arranged in the air control cavity in the shell, and comprises an air storage tank, a switch assembly and a control assembly, the air storage tank stores compressed gas and is provided with an air outlet; the switch assembly is arranged on the air storage tank and is arranged relative to the air outlet; the control assembly is connected to the switch assembly, and controls the working state of the switch assembly at a regular time, thereby controlling the compressed gas to be discharged outward from the air outlet.

[0007] Compared with the prior art, the gas control device provided by the present invention can realize the timed and quantitative release of compressed gas by setting the switch component and the control component that cooperate with each other on the gas storage tank, thereby providing a balanced and stable output. The injector adopts the gas control device, which can effectively convert the stored high-pressure potential energy into kinetic energy to promote the discharge of the material stored in the shell. The operator can set the control component as needed to accurately control the discharge of the material, and there is no need to pay attention all the time. The operation is simple, and one operator can easily set up multiple injectors, reducing labor costs.

Brief Description of the Drawings

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of the injector provided by the present invention;

[0010] Figure 2 It is a three-dimensional structural exploded diagram of the injector provided by the present invention;

[0011] Figure 3 is a cross-sectional view of the injector provided by the present invention;

[0012] Figure 4 is a cross-sectional view of a first embodiment of the air control device described in a first embodiment of the injector provided by the present invention;

[0013] Figure 5 is a cross-sectional view of the air control device in the second embodiment of the injector provided by the present invention;

[0014] Figure 6 is a cross-sectional view of the air control device in the third embodiment of the injector provided by the present invention;

[0015] Figure 7 is a cross-sectional view of the air control device in the fourth embodiment of the injector provided by the present invention;

[0016] Figure 8 is a cross-sectional view of the air control device in the fifth embodiment of the injector provided by the present invention; and

[0017] Fig. 9 It is a cross-sectional view of the air control device described in the sixth embodiment of the injector provided by the present invention. [Specific implementation method]

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] Please also see Figures 1 to 3, an injector 100 includes a shell 1, a movable component 3 and an air control device 5. A discharge port 101 is provided on one side of the shell 1, the movable component 3 is arranged in the shell 1, and is sealed against the inner wall of the shell 1, and a storage cavity 103 and an air control cavity 105 are respectively provided on both sides of the movable component 3. The air control device 5 is arranged in the air control cavity 105 in the shell 1, and controls the state change of the movable component 3 by controlling the release of the stored compressed gas (not shown), thereby reducing the volume of the storage cavity 103. The injector 100 can realize the push-out of the material (not shown) through the air control device 5, without the need for human operation, and the air control device 5 can be set in advance, which is efficient and labor-saving, and can accurately control the volume change of the storage cavity 103 to achieve accurate output of the material.

[0024] It should be noted that the material can be lubricating grease, liquid, or other soft materials or solutions, such as drugs for injection into animals or humans, various oil materials required for mechanical processing, and mixed animal bait, food or drinking water, etc. In the injection use scenario that requires unmanned real-time operation and monitoring, the injector 100 can be used to complete the injection, and the injection parameters can be adjusted by the air control device 5.

[0025] The specific structure and material of the housing 1 and the movable component 3 are not limited here, and can be set according to different usage scenarios. In the usage scenario with anti-static or explosion-proof, the housing 1 can be made of metal material; for the usage scenario where the internal situation needs to be observed or wireless communication is required, the housing 1 can be made of transparent plastic material, or set to a double-layer structure, with a transparent interior and a metal housing 1 with an observation window on the outside.

[0026] When setting the movable component 3, the main consideration is that the internal space of the shell 1 can be divided into the storage chamber 103 and the air control chamber 105, and the structure can be movable relative to the shell 1 to adjust the size of the storage chamber 103. In this embodiment, the movable component 3 is a piston structure, which can slide relative to the shell 1, thereby reducing the space of the storage chamber 103 and squeezing the material. Of course, in another embodiment, it can also be set as an elastic airbag structure for storing the high-pressure gas released by the air control device 5, thereby increasing the volume of the movable component 3 and also reducing the space size of the storage chamber 3. In another embodiment, the movable component 3 can also be set as a structure with an internal space, through the cooperation of the piston and the partition, a pressure-containing space is formed to accommodate the high-pressure gas released by the air control device 5, and then the piston is pushed to reduce the space of the storage chamber 3. The specific settings of the movable component 3 will not be repeated here one by one, as long as it can cooperate with the air control device 5 to achieve the effect of compressing the space of the storage chamber 3.

[0027] Please continue reading Figure 4 , Figure 4 The gas control device 5 in the first embodiment of the injector 100 provided by the present invention. To realize automatic control, the gas control device 5 includes a gas tank 51, a switch assembly 53 and a control assembly 55. The gas tank 51 stores compressed gas and is provided with a gas outlet 501. The switch assembly 53 is arranged on the gas tank 51 and is arranged relative to the gas outlet 501. The control assembly 55 is connected to the switch assembly 53 to control the working state of the switch assembly 53 at a fixed time, thereby controlling the compressed gas to be discharged outward from the gas outlet 501. The gas control device 5 can realize the timed and quantitative release of compressed gas by arranging the switch assembly 53 and the control assembly 55 that cooperate with each other on the gas tank 51, thereby providing a balanced and stable output.

[0028] The switch assembly 53 includes a drive motor 531 and a transmission mechanism 533. The transmission mechanism 533 is connected to the drive motor 531 and is arranged near the gas outlet 501. The drive motor 531 drives the transmission mechanism 533 to move, open or block the gas outlet 501, and realize the switching of the working state of the switch assembly 53. The rotation of the drive motor 531 will drive the transmission mechanism 533 to rotate or linearly move, and according to the rotation speed of the drive motor 531 and the rotation ratio between the drive motor 531 and the transmission mechanism 533, the progress of the transmission mechanism 533 and the rotation relationship of the drive motor 531 can be accurately calculated, and then the rotation of the drive motor 531 is controlled by the control assembly 55, so as to realize the automatic control of the relative movement of the transmission mechanism 533 relative to the gas storage tank 51.

[0029] This setting is simple and efficient, and has low requirements for the drive motor 531. It only needs to be rotated and controlled to release and close the compressed gas without being subjected to other forces. The drive motor 531 has low power and does not need to be in a working state all the time. It can be switched according to the setting of the control component 55, effectively reducing the consumption of electric energy, saving energy, and increasing the service life of the gas control device 5.

[0030] In order to stably control the release of the compressed gas in the gas storage tank 51, the transmission mechanism 533 includes a stabilizing block 5331 and a transmission rod 5333. The gas storage tank 51 is arranged on the stabilizing block 5331, and the transmission rod 5333 is directly or indirectly connected to the driving motor 531 and is movably arranged relative to the stabilizing block 5331. The driving motor 531 controls the movement of the transmission rod 5333 relative to the stabilizing block 5331. The transmission mechanism 533 relatively fixes the relative position of the gas storage tank 51 and the transmission mechanism 533 through the stabilizing block 5331, so that the transmission rod 5333 can stably abut or move away from the gas outlet 501 during the movement without deviation.

[0031] In addition, the transmission mechanism 533 can cooperate with the air outlet 501 through the relative movement of the transmission rod 5333 and the stabilizing block 5331, and control the switch of the air outlet 501 to release compressed gas. The structure is simple and ingenious, and the manufacturing cost is low.

[0032] In the first embodiment, the transmission rod 5333 includes a first contact surface 53331 and a second contact surface 53333, wherein the first contact surface 53331 is set as an arc surface; the second contact surface 53333 is arranged opposite to the first contact surface 53331, and is set as a plane or an arc surface with a smaller arc than the first contact surface 53331, and is located at the side of the transmission rod 5333 close to the gas outlet 501. The first contact surface 53331 is used to block the compressed gas from being discharged outward from the gas outlet 501, and the second contact surface 53333 is used to open the gas outlet 501 to release the compressed gas.

[0033] It should be noted that the second contact surface 53333 needs to be set to have a certain difference from the curvature of the first contact surface 53331, and the difference is mainly relative to the air outlet 501 or the stabilizing block 5331. In the first embodiment, the switch is mainly achieved by the drive motor 531 driving the transmission rod 5333 to rotate, and the switching method is that the first contact surface 53331 and the second contact surface 53333 have different degrees of cooperation with the air outlet 501. The first contact surface 53331 is set as an arc surface, and the air outlet 501 is set with a matching arc surface. The transmission rod 5333 fits exactly with the air outlet 501. When the transmission rod 5333 rotates to the point where the first contact surface 53331 is opposite to the air outlet 501, the transmission rod 5333 just blocks the air outlet 501, so that the gas tank 51 cannot release compressed gas; and the second contact surface 53333 is set as a plane structure. When the transmission rod 5333 rotates to the point where the second contact surface 53333 is opposite to the air outlet 501, there is a certain gap between the transmission rod 5333 and the air outlet 501, so that the gas tank 51 releases compressed gas. Of course, the second contact surface 53333 can also be set to an arc surface. The arc surface with a smaller curvature than the first contact surface 53331 means that when the transmission rod 5333 rotates to the point where the second contact surface 53333 is relative to the air outlet 501, there is a gap for releasing the compressed gas, just like the case where it is set to a plane. The specific curvature is not limited here.

[0034] Please continue reading Figure 5 , Figure 5 The gas control device 5 in the second embodiment of the injector 100 provided by the present invention. In the second embodiment, the gas outlet 501 and the transmission rod 5333 are not directly matched, but the matching of the transmission rod 5333 and the gas outlet 501 is realized through the stabilizing block 5331. The stabilizing block 5331 is provided with a gas outlet channel 5301 relative to the gas outlet 501, one end of the gas outlet channel 5301 is connected to the gas storage tank 51, and the other end of the gas outlet channel 5301 is matched with the transmission rod 5333. The first contact surface 53331 in the transmission rod 5333 fits exactly with the stabilizing block 5331, blocking the port of the gas outlet channel 5301, which is equivalent to indirectly blocking the gas outlet 501, so that the gas storage tank 51 cannot release compressed gas, and there is a gap between the second contact surface 53333 and the stabilizing block 5331 for releasing compressed gas.

[0035] Compared with the first embodiment, this arrangement realizes the coordination between the air outlet 501 and the transmission rod 5333 through the stabilizing block 5331. The stabilizing block 5331 can play a supporting role for the transmission rod 5333, and can make it easier for the transmission rod 5333 to switch between blocking and opening the air outlet channel 5301 and interacting with the outside world. In addition, there is no additional requirement for one end of the air outlet 501, and when the air tank 51 needs to be disassembled and replaced, the coordination between the stabilizing block 5331 and the transmission rod 5333 will not be easily affected, so that the sealing effect is maintained well in the closed state.

[0036] Please continue reading Figure 6 , Figure 6 The air control device 5 in the third embodiment of the injector 100 provided by the present invention. In the third embodiment, the transmission mechanism 533 further includes a sealing member 5335, which is arranged on the transmission rod 5333, and abuts against or moves away from the gas storage tank 51 as the transmission rod 5333 moves. Compared with the first and second embodiments, the transmission rod 5333 is arranged horizontally to realize the switching of the gas outlet 501 by rotational motion, and the transmission rod 5333 in the third embodiment is arranged longitudinally to realize the switching of the gas outlet 501 by linear motion.

[0037] A specific implementation method is to use the driving motor 531 to drive the transmission rod 5333 to perform linear motion relative to the gas storage tank 51 , and use the sealing member 5335 to seal and open the gas outlet 501 .

[0038] The longitudinal setting method is conducive to reducing the overall lateral volume of the air control device 5, and can avoid errors caused by friction loss. In the first embodiment and the second embodiment, the cooperation between the transmission rod 5333 and the air outlet 501 or the stabilizing block 5331 is achieved by rotation. Even if the first contact surface 53331 fits very well, long-term rotation may cause loss, resulting in a gap, which leads to errors of leaking compressed gas. However, there is no friction in the rotation direction between the seal 5335 and the air outlet 501, only pressure in the vertical direction, which has a better sealing effect.

[0039] Of course, the sealing member 5335 can be disposed in a variety of ways, and can be directly disposed at a position close to the air outlet 501, such as Figure 6 It can also be set at a position close to the stabilizing block 5331, such as Figure 7 As shown, Figure 7The air control device 5 in the fourth embodiment of the injector 100 provided by the present invention. In the fourth embodiment, the seal 5335 is arranged on the transmission rod 5333. When the transmission rod 5333 moves linearly, the seal 5335 abuts against or moves away from the stabilizing block 5331, thereby realizing the switch function. This setting method can not only solve the wear problem, but also, like the second embodiment, there is no additional setting requirement for one end of the air outlet 501. When the air tank 51 needs to be disassembled and replaced, it will not easily affect the coordination between the stabilizing block 5331, the transmission rod 5333 and the seal 5335, so that in the closed state, the sealing effect is maintained well, and the disassembly and replacement of the air tank 51 is convenient.

[0040] Of course, the sealing member 5335 may also be disposed in the air outlet channel 5301 in the stabilizing block 5331, such as Figure 6 As shown. The seal 5335 is arranged on the transmission rod 5333. Both the transmission rod 5333 and the seal 5335 enter the air outlet channel 5301 and move linearly along the air outlet channel 5301. Among them, the stabilizing block 5331 is provided with a protrusion 53311 in the air outlet channel 5301 to cooperate with the seal 5335. The overall size of the seal 5335 is smaller than the air outlet channel 5301, but larger than the space limited by the protrusion 53311 and the size of the air outlet 501. The size of the transmission rod 5333 is smaller than the space limited by the protrusion 53311, so that the transmission rod 5333 can move freely, while the seal 5335 cannot leave the air outlet channel 5301, but can block the air outlet 501 or the air outlet channel 5301 to achieve the switching of the switch.

[0041] The driving motor 531 controls the transmission rod 5333 to drive the sealing member 5335 to move in the gas outlet channel 5301. This arrangement can increase the switch control method, can be used for backup, and improve the reliability of the gas control device 5. The sealing member 5335 is divided into two contact surfaces. When there is a problem with the matching of the contact surface with the gas outlet 501, resulting in the release of compressed gas in the closed state, the control method of the control component 55 can be modified, and the sealing member 5335 and the stabilizing block 5331 can be used to cooperate with the switch switching mode, so as to achieve stable control of the release of compressed gas in the gas storage tank 51.

[0042] It should be noted that the seal 5335 described in the third and fourth embodiments can be made of a flexible material or a rigid material, and combined with a soft sealing ring. The sealing ring cooperates with the stabilizing block 5331 or the air outlet 501. The seal 5335 made of a rigid material can be integrated with the transmission rod 5333, which is convenient for processing and use.

[0043] In the third embodiment, the transmission rod 5333 and the stabilizing block 5331 may be provided with mutually matching threads at positions relative to the transmission rod 5333, and the driving motor 531 directly controls the rotation of the transmission rod 5333, and the transmission rod 5333 performs linear motion while rotating relative to the stabilizing block 5331. Threads are provided at the contact position between the stabilizing block 5331 and the transmission rod 5333 to convert the rotational motion into linear motion. The setting of the sealing member 5335 may refer to various situations of the third embodiment and the fourth embodiment, and will not be described in detail here. In this setting mode, the driving motor 531 can be directly connected to the transmission rod 5333 without setting other transmission structures, thereby improving the reliability of the switch assembly 53. Moreover, the transmission rod 5333 can fully contact with the stabilizing bar, thereby improving the stability of the movement of the transmission rod 5333.

[0044] Please continue to refer to Figure 8 , Figure 8 The gas control device 5 in the fifth embodiment of the injector 100 provided by the present invention. The stabilizing block 5331 is provided with an air outlet channel 5301 relative to the air outlet 501 and the transmission rod 5333. The transmission mechanism 533 also includes an air needle valve 5337 and a return spring 5339, both of which are arranged in the air outlet channel 5301, and the two ends of the return spring 5339 are respectively abutted against the air storage tank 51 and the air needle valve 5337, and the return spring 5339 pushes the air needle valve 5337 to abut against the transmission rod 5333. When the transmission rod 5333 moves relative to the stabilizing block 5331, it drives the air needle valve 5337 to move in the air outlet channel 5301.

[0045] In the fifth embodiment, the arrangement of the transmission rod 5333 is the same as that of the first embodiment, and will not be described in detail here. The transmission rod 5333 is arranged horizontally and the switch is switched by rotation. The air needle valve 5337 includes a main body 53371 and an abutment portion 53373. The main body 53371 is provided with a groove 5302. One end of the return spring 5339 is arranged in the groove 5302 to stabilize the position of the return spring 5339. The abutment portion 53373 is arranged on one side of the main body 53371 close to the transmission rod 5333. The abutment portion 53373 is an inverted cone structure with a certain curvature, and its size gradually decreases from the main body 53371 to the outside, ensuring that the abutment portion 53373 can extend from the air outlet channel 5301 in the stabilizing block 5331, while the main body 53371 will be restricted by the protruding portion 53311 of the stabilizing block 5331, and cannot extend out of the air outlet channel 5301 together with the abutment portion 53373, and can help block the air outlet channel 5301.

[0046] The transmission rod 5333 switches the surface that abuts against the abutment portion 53373 by rotation. When the first contact surface 53331 abuts against the abutment portion 53373, the transmission rod 5333 will push the abutment portion 53373 to move along the air outlet channel 5301 toward the air outlet 501, thereby releasing the compressed gas; when the second contact surface 53333 abuts against the abutment portion 53373, the return spring 5339 will push the abutment portion 53373 to move along the air outlet channel 5301 toward the direction of the transmission rod 5333, and maintain abutment with the transmission rod 5333 until the air needle valve 5337 abuts against the protrusion 53311, blocking the air outlet channel 5301. This arrangement effectively avoids the problem of leakage caused by rotational wear between the transmission rod 5333 and the stabilizing block 5331 by adding the air needle valve 5337 and the return spring 5339 to cooperate with the transmission rod 5333. If the abutment portion 53373 and the transmission rod 5333 are worn, the return spring 5339 pushes the air needle valve 5337 to fit more closely with the stabilizing block 5331, thereby enhancing the sealing effect.

[0047] In order to further enhance the sealing effect, an installation groove 5303 is provided between the abutment portion 53373 and the main body 53371, and a sealing rubber ring 53375 is installed in the installation groove 5303. The transmission mechanism 533 achieves sealing by providing the sealing rubber ring 53375 to cooperate and abut with the stabilizing block 5331. Moreover, the sealing rubber ring 53375 may have a certain elasticity. When wear occurs between the transmission rod 5333 and the abutment portion 53373, the sealing rubber ring 53375 may be squeezed to enhance the sealing effect. Of course, the air needle valve 5337 itself may also be made of soft rubber, and achieve sealing by cooperating with the stabilizing block 5331, which is not limited here.

[0048] In addition, in the above embodiment, in the scheme of using the stabilizing block 5331 in cooperation with the transmission rod 5333, a sealing arrangement is also required between the stabilizing block 5331 and the gas storage tank 51 to ensure that the gas outlet 501 can only release compressed gas to the outside through the gas outlet channel 5301. The specific setting method of the connection between the stabilizing block 5331 and the gas storage tank 51 is not limited here.

[0049] Please continue to refer to Fig. 9 , Fig. 9 The air control device 5 in the sixth embodiment of the injector 100 provided by the present invention. In the sixth embodiment, the main body 53373 may be provided with a protrusion 53377 to cooperate with the return spring 5339, and the protrusion 53377 extends into the return spring 5339, which can also stabilize the position of the return spring 5339.

[0050] Compared with the prior art, the gas control device 5 provided by the present invention realizes automatic control of the release switch of compressed gas by setting the switch assembly 53 and the control assembly 55 on the gas storage tank 51, accurately controls the release, and reduces the cost of human monitoring operation. The driving motor 531 cooperates with the transmission mechanism 533 to convert the control signal into a calculable transmission control, and the transmission mechanism 533 only needs to set the stabilizing block 5331 and the transmission rod 5333 to relatively fix the relative position of the gas storage tank 51 and the transmission mechanism 533, and realize the control of the release of compressed gas from the gas storage tank 51, which has a simple and ingenious structure and low cost.

[0051] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A gas control device, arranged in an injector, for controlling the output of materials, characterized in that: include: A gas storage tank, wherein the gas storage tank stores compressed gas and is provided with a gas outlet; A switch assembly, the switch assembly is arranged on the gas storage tank and is arranged relative to the gas outlet; and A control component is connected to the switch component to control the working state of the switch component at a fixed time, thereby controlling the compressed gas to be discharged outwardly from the gas outlet.

2. The gas control device according to claim 1, characterized in that: The switch assembly comprises: drive motor; and The transmission mechanism is connected to the drive motor and is arranged close to the air outlet. The drive motor drives the transmission mechanism to move, open or block the air outlet, and realize the switching of the working state of the switch component.

3. The gas control device according to claim 2, characterized in that: The transmission mechanism comprises: a stabilizing block, on which the gas storage tank is disposed; and A transmission rod is directly or indirectly connected to the driving motor and is movably arranged relative to the stabilizing block. The driving motor controls the transmission rod to move relative to the stabilizing block.

4. The gas control device according to claim 3, characterized in that: The transmission mechanism further comprises a sealing member, which is arranged on the transmission rod and moves closer to or farther away from the gas storage tank as the transmission rod moves.

5. The gas control device according to claim 4, characterized in that: The transmission rod and the stabilizing block are provided with mutually matching threads at positions relative to the transmission rod. The driving motor directly controls the rotation of the transmission rod, and the transmission rod performs linear motion while rotating relative to the stabilizing block.

6. The gas control device according to claim 3, characterized in that: The transmission rod comprises: A first contact surface, wherein the first contact surface is configured as a curved surface; and a second contact surface, the second contact surface being arranged opposite to the first contact surface, being a plane or an arc surface having a smaller arc than the first contact surface, and being located on a side of the transmission rod close to the air outlet; The first contact surface is used to block the compressed gas from being discharged outward from the gas outlet, and the second contact surface is used to open the gas outlet to release the compressed gas.

7. The gas control device according to claim 3, characterized in that: The stabilizing block is provided with an air outlet passage relative to the air outlet and the transmission rod; The transmission mechanism further includes an air needle valve and a return spring, both of which are arranged in the air outlet passage, and both ends of the return spring are respectively in contact with the air storage tank and the air needle valve, and the return spring pushes the air needle valve to contact the transmission rod; When the transmission rod moves relative to the stabilizing block, the air needle valve is driven to move in the air outlet channel.

8. The gas control device according to claim 7, characterized in that: The gas needle valve comprises: A main body, wherein a groove or a protrusion is provided on the main body, and one end of the return spring is engaged with the groove or the protrusion to stabilize the position of the return spring; and The abutment portion is arranged on a side of the main body close to the transmission rod, and the abutment portion is an inverted cone structure.

9. The gas control device according to claim 8, characterized in that: A mounting groove is provided between the abutting portion and the main body portion, and a sealing rubber ring is installed in the mounting groove.

10. An injector, characterized in that: include: A shell, wherein a discharge port is provided on one side of the shell; A movable component, the movable component is arranged in the shell and is sealed against the inner wall of the shell, and a material storage cavity and an air control cavity are respectively provided on two sides of the movable component; and According to any one of claims 1 to 9, the air control device is arranged in the air control cavity in the shell.

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