Control valve and pneumatic device with same

Abstract

The utility model relates to the field of pneumatics, in particular to a control valve with higher stability and a pneumatic device with the control valve, the control valve is located on a valve body through a second exhaust port, and the flow area of a first exhaust port is larger than that of the second exhaust port. Compared with the prior art, the flow rate of the medium passing through the first exhaust port is larger than that of the medium passing through the second exhaust port, the flow area of the second exhaust port is more stable, and the stability of the control valve is higher; the pneumatic device comprises the control valve and an air cylinder, the containing cavity and the working channel are communicated through the air channel, the second exhaust port is directly formed in the valve body, and compared with the background technology, the circulation area of the second exhaust port is more stable, the stability of the control valve is higher, and the speed of the piston head in the reciprocating movement process is more stable.

Description

Technical Field

[0001] The utility model relates to the field of pneumatics, in particular to a control valve and a pneumatic device having the same. Background Art

[0002] refer to Figure 10 In the field of pneumatics, valves serve as control elements, providing the gas required for the actuator to move. For example, the actuator is usually a cylinder 1'. The valve controls the on-off of the gas circuit, thereby controlling the movement of the piston of the cylinder 1', thereby driving the movement of other components.

[0003] A control valve 2' of the related technology includes a valve cavity 023' and a valve stem 021', the valve stem 021' is located in the valve cavity 023', and the control valve 2' also includes two working holes 022', two exhaust holes 024' and an air source hole. The working holes 022' are connected to the air path of the actuator, and the exhaust holes 024' are connected to the atmospheric environment outside the control valve 2'. The gas enters the valve cavity 023' through the air source hole, and is located in different positions after moving through the valve stem 021', controlling the on-off between the working holes 022', the exhaust holes 024' and the air source hole, thereby controlling the movement direction of the actuator.

[0004] However, in some operating conditions, it is necessary to control the flow rate of gas discharged from the two exhaust holes 024' to be different. To do this, a single plug 5' is inserted into each exhaust hole 024', utilizing the gap between the wall of the exhaust hole 024' and the plug 5' to throttle the flow, reducing the corresponding flow area. This results in the control valve 2' discharging gas at different speeds from the different exhaust holes 024'. The plug 5' is made of rubber, which is easily deformed. This affects the size of the gap between the wall of the exhaust hole 024' and the plug 5', affecting the corresponding flow area. Therefore, the stability of the control valve 2' needs to be improved. Utility Model Content

[0005] The utility model provides a control valve that solves the above problems:

[0006] A control valve includes a valve body and a valve stem. The control valve also includes a valve cavity. The valve stem is located in the valve cavity. The control valve includes a working channel. The working channel includes an exhaust channel. The exhaust channel is connected to the outside of the control valve. The exhaust channel has a first exhaust port and a second exhaust port. The second exhaust port is located in the valve body. The flow area of ​​the first exhaust port is greater than the flow area of ​​the second exhaust port.

[0007] Such a control valve is located in the valve body through the second exhaust port, and the flow area of ​​the first exhaust port is larger than the flow area of ​​the second exhaust port, so that the flow rate of the medium passing through the first exhaust port is greater than the flow rate of the medium passing through the second exhaust port. The flow area of ​​the second exhaust port is more stable and the stability of the control valve is higher.

[0008] The utility model provides a pneumatic device to solve the above problems:

[0009] The control valve including the above technical solution, the pneumatic device also includes a cylinder, the cylinder includes a cylinder body and a piston assembly, the cylinder includes a accommodating chamber, the piston assembly includes a piston head, the piston head is located in the accommodating chamber, the pneumatic device includes an air path channel, the air path channel connects the accommodating chamber and the working channel.

[0010] Such a pneumatic device is located in the valve body through the second exhaust port, and the flow area of ​​the first exhaust port is larger than the flow area of ​​the second exhaust port, so that the flow rate of the medium passing through the first exhaust port is greater than the flow rate of the medium passing through the second exhaust port. The pneumatic device includes an air path channel, which connects the accommodating chamber and the working channel, that is, the second exhaust port is directly set on the valve body. Compared with the background technology, the flow area of ​​the second exhaust port is more stable, and the stability of the control valve is higher, so that the speed of the piston head during the reciprocating movement is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG1 is a cross-sectional schematic diagram of a control valve when the valve stem is in a first position according to an embodiment;

[0012] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle;

[0013] Figure 3 for Figure 1 A magnified schematic diagram of area B in the middle;

[0014] Figure 4 for Figure 1 A cross-sectional schematic diagram of the middle control valve when the valve stem is in the second position;

[0015] Figure 5 for Figure 4 A magnified schematic diagram of area A in the middle;

[0016] Figure 6 for Figure 4 A magnified schematic diagram of area B in the middle;

[0017] Figure 7 for Figure 1 Bottom view of the middle control valve;

[0018] Figure 8 FIG1 is a cross-sectional schematic diagram of a pneumatic device with a valve stem of a control valve in a first position according to an embodiment;

[0019] Figure 9 for Figure 8 A schematic cross-sectional view of the pneumatic device when the valve stem of the middle control valve is in the second position;

[0020] Figure 10A cross-sectional schematic diagram of background technology.

[0021] Reference numerals:

[0022] Cylinder 1, cylinder body 11, platform portion 12, first outer wall portion 121, air passage 13, first air passage 131, second air passage 132, inner port 130, outer port 133, cylinder body sidewall 15, piston assembly 17, piston head 171, accommodating chamber 18;

[0023] Control valve 2, valve body 020, main body inner wall 0201, second protrusion 0202, valve outer wall 0203, valve stem 021, main body 0211, first protrusion 0212, valve cavity 023, working channel 20, exhaust channel 21, second branch 211, third section 2111, fourth section 2112, first exhaust port 0021, first branch 212, first section 2121, second section 2122, second exhaust port 0022, valve working port 23, first working port 231, second working port 232; first muffler 24, second muffler 25, sealing portion 26;

[0024] Control valve 2' valve cavity 023', valve stem 021', working hole 022', exhaust hole 024';

[0025] Cylinder 1';

[0026] Air path plate 3', air path channel 30', silencer nut 4', nut 41', silencer plate 411', screw rod 42', first hole 421', plug body 5'. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The technical solutions of the specific implementation methods are described below with reference to the accompanying drawings:

[0029] refer to Figure 1-Figure 3A control valve 2 includes a valve body 020 and a valve stem 021. The control valve 2 includes a valve cavity 023. The valve stem 021 is located in the valve cavity 023. The control valve 2 includes a working channel 20. The working channel 20 includes an exhaust channel 21. The exhaust channel 21 is connected to the outside of the control valve 2. The exhaust channel 21 has a first exhaust port 0021 and a second exhaust port 0022. The working channel 20 also has a valve working port 23 and an air source port. The valve working port 23 includes a first working port 231, a second working port 232 and an air source port (not shown in the figure). The first position (not shown in the figure) and the second position (not shown in the figure) are defined as the positions of the control valve 2 when the control valve 2 is working. The two positions of the corresponding valve stem 021; when the valve stem 021 is in the first position, the gas enters the working channel 20 through the gas source port, the first working port 231 and the first exhaust port 0021 are disconnected, the first working port 231 and the gas source port are connected, the gas source port and the second working port 232 are disconnected, and the second working port 232 and the second exhaust port 0022 are connected; when the valve stem 021 is in the second position, the gas enters the working channel 20 through the gas source port, the second working port 232 and the second exhaust port 0022 are disconnected, the second working port 232 and the gas source port are connected, the gas source port and the first working port 231 are disconnected, and the first working port 231 and the first exhaust port 0021 are connected.

[0030] Under special working conditions, the flow area of ​​the first exhaust port 0021 is larger than the flow area of ​​the second exhaust port 0022; when the control valve 2 rod is in the first position and the second position, that is, the control valve 2 is in different states, the flow rate of the medium through the first exhaust port 0021 and the second exhaust port 0022 is different.

[0031] Specifically, the second exhaust port 0022 is located in the valve body 020 , and the flow area of ​​the second exhaust port 0022 is the minimum flow area of ​​the working channel 20 .

[0032] In such a control valve 2, the second exhaust port 0022 is located in the valve body 020, and the flow area of ​​the first exhaust port 0021 is larger than the flow area of ​​the second exhaust port 0022, so that the flow rate of the medium passing through the first exhaust port is greater than the flow rate of the medium passing through the second exhaust port. Compared with the background technology, the flow area of ​​the second exhaust port 0022 is more stable, and the stability of the control valve 2 is higher.

[0033] It should be noted that the flow area of ​​the first exhaust port refers to the area of ​​the first exhaust port, and the flow area of ​​the second exhaust port refers to the area of ​​the second exhaust port.

[0034] In one embodiment, reference Figure 1-Figure 7The exhaust channel 21 includes a first branch 212, the first branch 212 has a second exhaust port 0022, the first branch 212 includes a first section 2121 and a second section 2122, the second exhaust port 0022 is located in the first section 2121, a port of the first section is connected to a port of the second section, and the first section and the second section extend in the same direction, a flow area of ​​the first section 2121 is smaller than a flow area of ​​the second section 2122, the valve body 020 has a valve outer wall portion 0203, and a port of the second section 2122 is located at the valve outer wall portion 0203.

[0035] In this control valve 2, the second exhaust port 0022 is located in the first section 2121. The flow area of ​​the first section 2121 is smaller than that of the second section 2122. One port of the second section 2122 is located on the valve outer wall 0203. Under special operating conditions, the flow area corresponding to the second exhaust port 0022 is smaller, such as when the wall thickness is thick, which is not conducive to machining. The flow area of ​​the second section 2122 is larger than that of the first section 2121, making the second section 2122 easier to machine than the first section 2121. The second section 2122 with a larger flow area can be machined first, followed by the first section 2121. Compared to machining the first section 2121 directly on the valve body 020, in this embodiment, the wall thickness corresponding to the first section 2121 is thinner, which is more convenient for machining the first section 2121, i.e., the second exhaust port 0022. More specifically, the first branch 212 can be a stepped hole, and the aperture corresponding to the second exhaust port 0022 is between 0.5 mm and 2.5 mm.

[0036] More specifically, the control valve 2 includes a first silencer 24, which is located in the second section 2122. The first silencer 24 has a plurality of flow gaps (not shown in the figure), and the sum of the flow areas of the plurality of flow gaps is greater than the flow area of ​​the second exhaust port 0022. More specifically, the first silencer 24 can be or approximately be a cylinder, the height of the cylinder is greater than 0.5 mm, and the diameter of the cylinder is between 5 mm and 15 mm. The first silencer 24 is formed by bonding a plurality of copper particles, and there are flow gaps between the copper particles. The sum of the flow areas of the plurality of flow gaps is greater than the flow area of ​​the second exhaust port 0022, ensuring that the gas discharged from the control valve 2 from the first branch 212 is throttled through the second exhaust port 0022. Compared with the current existing technology, the flow area of ​​the second exhaust port 0022 of this solution is more stable and the throttling effect is better. For example, referring to Figure 10In the prior art, a control valve 2' includes a silencer nut 4', which is spirally arranged on the wall portion corresponding to the exhaust hole 024'. The silencer nut 4' includes a nut 41' and a screw 42'. The nut 41' has a silencer plate, and the screw 42' has a first hole 421'. The control valve 2' also includes a plug 5', at least a portion of which is located in the first hole 421'. The first hole 421' extends along the extension direction of the screw 42'. Throttling is achieved through the gap between the plug 5' and the wall portion corresponding to the screw 42'. With long-term use, the plug ages. Moreover, the plug is usually made of rubber, which is easily deformed. That is, the gap between the plug and the wall portion corresponding to the screw is unstable, affecting the stability of the control valve 2'. In this embodiment, more specifically, the first silencer 24 and the wall portion corresponding to the second section 2122 abut against each other, realizing the position limiting setting of the wall portion corresponding to the first silencer 24 and the second section 2122. Compared with the background art, the throttling and silencer structures are simpler.

[0037] Of course, as other embodiments, the exhaust channel 21 includes a first branch 212, the first branch 212 has a second exhaust port 0022, the valve body 020 has a valve outer wall portion 0203, the second exhaust port 0022 is located at the valve outer wall portion 0203, the first branch 212 can be a through hole with the same diameter in its extension direction, and the diameter of the through hole is the diameter corresponding to the second exhaust port 0022. In this way, the structure of the control valve 2 is simpler.

[0038] In one embodiment, reference Figure 1-Figure 7 The exhaust channel 21 includes a second branch 211, which has a first exhaust port 0021. The flow area of ​​the first exhaust port 0021 is larger than the flow area of ​​the second exhaust port 0022, ensuring that the exhaust velocities through the first exhaust port 0021 and the second exhaust port 0022 are different when the control valve 2 is in different states. The second branch 211 includes a third section 2111 and a fourth section 2112. One port of the third section is connected to one port of the fourth section, and the third and fourth sections extend in the same direction. The first exhaust port 0021 is located in the third section 2111. The flow area of ​​the third section 2111 is smaller than that of the fourth section 2112. The valve body 020 has a valve outer wall portion 0203, and one port of the fourth section 2112 is located on the valve outer wall portion 0203.

[0039] In this control valve 2, the first exhaust port 0021 is located in the third section 2111. The flow area of ​​the third section 2111 is smaller than that of the fourth section 2112, and one port of the fourth section 2112 is located on the valve outer wall 0203. Specifically, the second branch 211 controls the flow through the first exhaust port 0021 corresponding to the third section 2111. The flow area corresponding to the first exhaust port 0021 is smaller, which, if the wall thickness is thick, is not conducive to machining. The flow area of ​​the fourth section 2112 is larger than that of the third section 2111, making it easier to machine than the third section 2111. The fourth section 2112, with its larger flow area, can be machined first, followed by the third section 2111. Compared to machining the third section 2111 directly on the valve body 020, in this embodiment, the wall thickness corresponding to the third section 2111 is thinner, making machining of the third section 2111, i.e., the first exhaust port 0021, more convenient.

[0040] More specifically, the shape of any one of the first exhaust port 0021, the second exhaust port 0022, the first working port 231 and the second working port 232 is in the length direction along the radial extension direction of the valve stem 021, and the shape of any one of the first exhaust port 0021, the second exhaust port 0022, the first working port 231 and the second working port 232 is in the width direction along the axial extension direction of the valve stem 021. The minimum dimension of the first exhaust port 0021 in the width direction is smaller than the minimum dimension of the first exhaust port 0021 in the length direction, and / or the minimum dimension of the second exhaust port 0022 in the width direction is smaller than the minimum dimension of the second exhaust port 0022 in the length direction, and / or the minimum dimension of the first working port 231 in the width direction is smaller than the minimum dimension of the first working port 231 in the length direction, and / or the minimum dimension of the second working port 232 in the width direction is smaller than the minimum dimension of the second working port 232 in the length direction. The shape of any one of the first exhaust port 0021 , the second exhaust port 0022 , the first working port 231 and the second working port 232 may be or approximately be a long strip or an ellipse.

[0041] Such a control valve 2 can increase its size in the length direction to meet the requirement of larger flow rate by making the minimum size of the first exhaust port 0021 in the width direction smaller than the minimum size of the first exhaust port 0021 in the length direction, and / or the minimum size of the second exhaust port 0022 in the width direction smaller than the minimum size of the second exhaust port 0022 in the length direction, and / or the minimum size of the first working port 231 in the width direction smaller than the minimum size of the first working port 231 in the length direction, and / or the minimum size of the second working port 232 in the width direction smaller than the minimum size of the second working port 232 in the length direction.

[0042] More specifically, the valve stem 021 includes a main body 0211 and a first protrusion 0212, the first protrusion 0212 protrudes radially from the main body 0211, the control valve 2 includes a sealing portion 26, the sealing portion 26 is located on the circumferential side of the valve stem 021, and the sealing portion 26 is limited to the first protrusion 0212, the valve body 020 includes a main body inner wall 0201 and a second protrusion 0202, the second protrusion 0202 protrudes radially from the main body inner wall 0201 of the valve stem 021, when the valve stem 021 is in the first position and the second position, the sealing portion 26 and the second protrusion 0202 cooperate to realize the connection and disconnection of the cavity on both sides of the axial direction of the valve stem 021 at the first protrusion 0212. When the first protrusion 0212 is disconnected from the cavity on both sides of the axial direction of the valve stem 021, the sealing part 26 and the second protrusion 0202 abut against each other, and the width direction of the second protrusion 0202 is the axial direction of the valve stem 021. In order to increase the flow rate of any one of the first exhaust port 0021, the second exhaust port 0022, the first working port 231 and the second working port 232, and expand the width direction size of any one of the first exhaust port 0021, the second exhaust port 0022, the first working port 231 and the second working port 232, the width size of the second protrusion 0202 will be reduced, affecting the fit between the sealing part 26 and the second protrusion 0202.

[0043] More specifically, the second branch 211 can be a stepped hole; the control valve 2 includes a second silencer 25, which is located in the fourth section 2112. The second silencer 25 has a plurality of flow gaps (not shown in the figure), and the total flow area of ​​the plurality of flow gaps is greater than the flow area of ​​the first exhaust port 0021. More specifically, the second silencer 25 can be or approximately be a cylinder, with a height greater than 0.5 mm and a diameter between 5 mm and 15 mm. The second silencer 25 is formed by bonding a plurality of copper particles, with flow gaps between the copper particles. The total flow area of ​​the plurality of flow gaps is greater than the flow area of ​​the first exhaust port 0021, ensuring that the first exhaust port 0021 in the second branch 211 has the function of controlling the flow. Compared with the current existing technology, the flow area of ​​the first exhaust port 0021 in this solution is more stable and has a better effect in controlling the flow. The second muffler 25 and the wall portion corresponding to the fourth section 2112 are in contact with each other. More specifically, the second muffler 25 and the wall portion corresponding to the fourth section 2112 are interference fit. In this way, the position limit setting of the second muffler 25 and the valve body 020 is achieved. Compared with the background technology, this solution is less expensive. For example, referring to Figure 10 The existing technology is that the control valve 2' includes a silencer nut 4', the silencer nut 4' and the wall corresponding to the exhaust hole 024' are spirally arranged, the silencer nut 4' includes a nut 41' and a screw 42', and the nut 41' has a silencer plate. The assembly cost of this solution is relatively high.

[0044] refer to Figure 8-Figure 9 A pneumatic device includes a control valve 2 and a cylinder 1 of the above-mentioned technical solution, the cylinder 1 includes a cylinder body 11 and a piston assembly 17, the cylinder 1 includes an accommodating chamber 18, the piston assembly 17 includes a piston head 171, the piston head 171 is located in the accommodating chamber 18, the pneumatic device includes an air path channel 13, the air path channel 13 connects the accommodating chamber 18 and the working channel 20.

[0045] Such a pneumatic device is located in the valve body 020 through the second exhaust port 0022, the flow area of ​​the first exhaust port 0021 is larger than the flow area of ​​the second exhaust port 0022, and the flow area of ​​the second exhaust port 0022 is the minimum flow area of ​​the working channel 20. The pneumatic device includes an air path channel 13, which connects the accommodating chamber 18 and the working channel 20, that is, the second exhaust port 0022 is directly set on the valve body 020. Compared with the background technology, the flow area of ​​the second exhaust port 0022 is more stable, and the stability of the control valve 2 is higher, so that the speed of the piston head 171 during the reciprocating movement is more stable.

[0046] It should be noted that the flow area of ​​the first exhaust port refers to the area of ​​the first exhaust port, and the flow area of ​​the second exhaust port refers to the area of ​​the second exhaust port.

[0047] More specifically, the gas path includes a first gas path 131 and a second gas path 132, the first gas path 131 connects the first working port 231 and the accommodating chamber, and the second gas path 132 connects the second working port 232 and the accommodating chamber; a first direction is defined, and the gas entering the accommodating chamber through the second gas path 132 and the second working port 232 acts on one side of the piston head 171, causing the piston head 171 to move toward the first direction; a second direction is defined, and the gas entering the accommodating chamber 18 through the first gas path 131 and the first working port 231 acts on one side of the piston head 171, causing the piston head 171 to move toward the second direction. When the valve stem 021 is in the second position, the gas enters the working channel 20 through the gas source port, the second working port 232 and the second exhaust port 0022 are disconnected, the second working port 232 and the gas source port are connected, the gas source port and the first working port 231 are disconnected, the first working port 231 and the first exhaust port 0021 are connected, the second gas path connects the second working port 232 and the accommodating chamber, the gas enters the accommodating chamber 18 through the second working port 232 and the second gas path 132, acts on one side of the piston head 171, so that the piston head 171 moves toward the first direction, and the gas on the other side of the piston head 171 is discharged through the first gas path 131, the first working port 231 and the first exhaust port 0021. Valve 2; when the valve stem 021 is in the first position, the gas enters the working channel 20 through the gas source port, the first working port 231 and the first exhaust port 0021 are disconnected, the first working port 231 and the gas source port are connected, the gas source port and the second working port 232 are disconnected, and the second working port 232 and the second exhaust port 0022 are connected; the first gas path 131 connects the first working port 231 and the accommodating chamber, and the gas enters the accommodating chamber through the first working port 231 and the first gas path 131, acts on one side of the piston, causing the piston head to move toward the second direction, and the gas on the other side of the piston head 171 is discharged from the control valve 2 through the second gas path 132, the second working port 232 and the second exhaust port 0022.

[0048] Such a pneumatic device is located in the valve body through the second exhaust port, and the flow area of ​​the first exhaust port 0021 is larger than the flow area of ​​the second exhaust port 0022, so that the flow rate of the medium passing through the first exhaust port is greater than the flow rate of the medium passing through the second exhaust port. The flow area of ​​the second exhaust port is more stable, and the stability of the control valve is higher, so that the movement speed of the piston head when moving along the first direction and the second direction is different, meeting the requirements of different working conditions.

[0049] In one embodiment, the cylinder 1 includes a cylinder body 11 , the cylinder body 11 has a first outer wall portion 121 , the control valve 2 is limitedly disposed or fixed to the first outer wall portion 121 , and the cylinder body 11 has an air passage 13 .

[0050] Such a pneumatic device has a first outer wall portion 121 of the cylinder body 11, the control valve 2 is limited or fixed to the first outer wall portion 121, and the cylinder body 11 has an air passage 13, that is, the cylinder body 11 is an integrated structure, which avoids the assembly of other intermediate parts compared to the prior art, and is simple to assemble; for example, referring to Figure 10 The air path plate 3' has an air path channel 30'. The air path plate 3' is installed with the cylinder 1' and the control valve 2'. The installation process is relatively simple.

[0051] It should be noted that the limiting setting between the control valve 2 and the first outer wall portion 121 can be understood as a limiting setting between the control valve 2 and the first outer wall portion 121, and the control valve 2 and the first outer wall portion 121 are detachable, for example, the control valve 2 and the first outer wall portion 121 are limited by bolts, or other detachable limiting methods; the control valve 2 and the first outer wall portion 121 are fixed, which can be understood as the control valve 2 and the first outer wall portion 121 are non-detachable, for example, the control valve 2 and the first outer wall portion 121 are welded and fixed, or fixed by other non-detachable implementation methods.

[0052] Specifically, the air path channel 13 includes an inner port 130 and an outer port 133. The inner port 130 is located on the inner wall corresponding to the accommodating chamber 18, and the outer port 133 is located on the first outer wall portion 121. The working channel 20 has a valve working port 23, and the outer port 133 is connected to the valve working port 23. In this way, the accommodating chamber 18 and the working channel 20 are connected through the air path channel 13 corresponding to the cylinder body 11. Compared with the background technology, the assembly of other intermediate parts is avoided, such as the installation of the air path plate 3', the cylinder 1' and the control valve 2', and the installation process is relatively simple.

[0053] In one embodiment, reference Figure 8-Figure 9 The cylinder body 11 includes a cylinder side wall 15, at least part of which extends along the moving direction of the piston head 171, and the cylinder side wall 15 and the piston head 171 are slidably fitted together. The cylinder body 11 includes a platform portion 12, which protrudes from the cylinder side wall 15, and the first outer wall portion 121 is at least part of the platform portion 12. The first outer wall portion 121 is set away from the cylinder side wall 15.

[0054] Such a pneumatic device has a platform portion 12 protruding from the cylinder side wall 15, and the first outer wall portion 121 is at least a part of the platform portion 12. The first outer wall portion 121 is set away from the cylinder side wall 15, which reduces the material cost compared with other implementations; for example, the outer surface of the cylinder 11 is made into a square cross-section shape, and the wall portion corresponding to one surface of the square and the control valve are fixed or limited. Although it can also meet the assembly requirements of the cylinder and the control valve, the material cost is higher than that of this embodiment.

[0055] It should be noted that: although this specification has described the utility model in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that technicians in the relevant technical field can still modify, combine or replace the utility model, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A control valve, the control valve (2) comprising a valve body (020) and a valve stem (021), the control valve (2) further comprising a valve cavity (023), the valve stem (021) being located in the valve cavity (023), characterized in that: The control valve (2) includes a working channel (20), the working channel (20) includes an exhaust channel (21), the exhaust channel (21) is in communication with the outside of the control valve (2), the exhaust channel (21) has a first exhaust port (0021) and a second exhaust port (0022), the second exhaust port (0022) is located in the valve body (020), and the flow area of ​​the first exhaust port (0021) is larger than the flow area of ​​the second exhaust port (0022).

2. The control valve according to claim 1, characterized in that The working channel (20) has a valve working port (23), and the valve working port (23) includes a first working port (231) and a second working port (232). The shape of any one of the first exhaust port (0021), the second exhaust port (0022), the first working port (231), and the second working port (232) is in the longitudinal direction along the radial extension direction of the valve stem (021). The shape of any one of the first exhaust port (0021), the second exhaust port (0022), the first working port (231), and the second working port (232) is in the axial direction along the valve stem (021). The extension direction is the width direction; the minimum dimension of the first exhaust port (0021) in the width direction is smaller than the minimum dimension of the first exhaust port (0021) in the length direction, and / or the minimum dimension of the second exhaust port (0022) in the width direction is smaller than the minimum dimension of the second exhaust port (0022) in the length direction, and / or the minimum dimension of the first working port (231) in the width direction is smaller than the minimum dimension of the first working port (231) in the length direction, and / or the minimum dimension of the second working port (232) in the width direction is smaller than the minimum dimension of the second working port (232) in the length direction.

3. The control valve according to claim 1, wherein: The exhaust channel (21) includes a first branch (212), the first branch (212) has a second exhaust port (0022), the first branch (212) includes a first section (2121) and a second section (2122), a port of the first section is connected to a port of the second section, and the first section and the second section extend in the same direction, the second exhaust port (0022) is located in the first section (2121), the flow area of ​​the first section (2121) is smaller than the flow area of ​​the second section (2122), and the valve body (020) has a valve outer wall portion (0203), and a port of the second section (2122) is located in the valve outer wall portion (0203).

4. The control valve according to claim 3, characterized in that The control valve (2) includes a first silencer (24), the first silencer (24) is located in the second section (2122), the first silencer (24) has a plurality of flow gaps, and the sum of the flow areas of the plurality of flow gaps is greater than the flow area of ​​the second exhaust port (0022).

5. The control valve according to claim 1, wherein: The exhaust channel (21) comprises a first branch (212), the first branch (212) has a second exhaust port (0022), the valve body (020) has a valve outer wall portion (0203), and the second exhaust port (0022) is located on the valve outer wall portion (0203).

6. The control valve according to any one of claims 1 to 5, characterized in that: The exhaust channel (21) includes a second branch (211), the second branch (211) has a first exhaust port (0021), the second branch (211) includes a third section (2111) and a fourth section (2112), a port of the third section is connected to a port of the fourth section, and the third section and the fourth section extend in the same direction, the first exhaust port (0021) is located in the third section (2111), the flow area of ​​the third section (2111) is smaller than the flow area of ​​the fourth section (2112), the valve body (020) has a valve outer wall portion (0203), a port of the fourth section (2112) is located in the valve outer wall portion (0203), the control valve (2) includes a second silencer (25), the second silencer (25) is located in the fourth section (2112), the second silencer (25) has a plurality of flow gaps, and the sum of the flow areas of the plurality of flow gaps is greater than the flow area of ​​the first exhaust port (0021).

7. A pneumatic device comprising the control valve according to any one of claims 1 to 6, characterized in that: The pneumatic device comprises a cylinder, wherein the cylinder (1) comprises a cylinder body (11) and a piston assembly (17), wherein the cylinder (1) comprises an accommodating chamber (18), wherein the piston assembly (17) comprises a piston head (171), wherein the piston head (171) is located in the accommodating chamber (18), and wherein the pneumatic device comprises an air passage (13), wherein the air passage connects the accommodating chamber (18) and the working passage (20).

8. The pneumatic device according to claim 7, characterized in that: The cylinder body (11) has a first outer wall portion (121), the control valve (2) and the first outer wall portion (121) are position-limited or fixed, and the cylinder body (11) has an air passage (13).

9. The pneumatic device according to claim 8, characterized in that The air passage (13) comprises an inner port (130) and an outer port (133), wherein the inner port (130) is located on an inner wall corresponding to the accommodating cavity (18), and the outer port (133) is located on the first outer wall portion (121). The working channel (20) has a valve working port (23), and the outer port (133) is in communication with the valve working port (23).

10. The pneumatic device according to claim 9, characterized in that: The cylinder body (11) includes a cylinder body side wall (15), at least a portion of the cylinder body side wall (15) extends along the moving direction of the piston head (171), the cylinder body side wall (15) and the piston head (171) are slidably matched, the cylinder body (11) includes a platform portion (12), the platform portion (12) protrudes from the cylinder body side wall (15), the first outer wall portion (121) is at least a portion of the platform portion (12), and the first outer wall portion (121) is arranged away from the cylinder body side wall (15).

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