Gas buffer cavity structure

Abstract

The invention discloses a gas buffer cavity structure which comprises an inner plug arranged in a cavity of a valve body, the inner plug is provided with a through hole, a first main gas channel and a first secondary gas channel, a first sealing piece and a second sealing piece are arranged in the through hole, and the through hole and the first secondary gas channel are arranged in a spaced mode; the through hole and the first main gas channel form a first gas path, and the first secondary gas channel and the first main gas channel form a second gas path; the outer plug is arranged in the cavity, a piston cavity is formed between the outer plug and the inner plug, a blind hole, a second main gas channel and a second secondary gas channel are formed in the outer plug, a third sealing piece is arranged in the blind hole, the blind hole and the second secondary gas channel are arranged at an interval, and a third gas path is formed by the blind hole and the second main gas channel; the second secondary gas channel and the second main gas channel form a fourth gas path; therefore, the technical problems that the noise is relatively large and the service life is shortened are solved.

Description

Technical Field

[0001] This invention relates to the field of cylinder technology for valves, specifically a gas buffer chamber structure. Background Technology

[0002] A cylinder is a component that converts the pressure energy of compressed air into mechanical energy. It is an important part of a valve and is used to generate driving force to open or close the valve plate. A cylinder generally includes: cylinder barrel, cylinder head, piston, and piston rod; the cylinder head is connected to the end of the cylinder barrel; the piston is located inside the cylinder barrel; one end of the piston rod is connected to the piston, and the other end passes through the cylinder head; the outer wall of the cylinder barrel has two air ports, one of which is for compressed air to enter while the other is for exhaust, thus causing the piston to move linearly inside the cylinder barrel. In existing technology, the two air ports are generally round holes with quick-connect nozzles. Both ports are the same size and specifications. When the piston moves in a straight line along the cylinder, there is no cushioning. The piston has a relatively large impact force on the cylinder head, which not only results in relatively high noise but also reduces service life. Summary of the Invention

[0003] In view of the above-mentioned shortcomings in the related technologies, the purpose is to provide a gas buffer chamber structure to solve the technical problems of relatively high noise and reduced service life in the related technologies; The technical solution to achieve the objective is: a gas buffer chamber structure, comprising: An inner plug is disposed in a cavity on the valve body. The inner plug has a through hole, a first main air passage and a first air passage. A first sealing element and a second sealing element are disposed in the through hole. The through hole and the first air passage are spaced apart. The through hole and the first main air passage form a first air path. The first air passage and the first main air passage form a second air path. An outer plug is provided in the cavity, forming a piston chamber with the inner plug. The outer plug has a blind hole, a second main air passage, and a second air passage. A third sealing element is provided in the blind hole. The blind hole and the second air passage are spaced apart. The blind hole and the second main air passage form a third air passage. The second air passage and the second main air passage form a fourth air passage. When pressurized gas enters the first main gas passage, the pressurized gas pushes the piston and piston rod to move downward along the piston chamber. At this time, the pressurized gas is discharged from the third gas passage and the fourth gas passage. When the piston rod contacts the third seal, the blind hole is blocked by the piston rod, and the third gas passage is blocked and closed. At this time, the pressurized gas can only be discharged from the fourth gas passage, forming a buffer, and the moving speed of the piston and piston rod is slowed down. When pressurized gas enters the second main gas passage, the pressurized gas pushes the piston and piston rod to move upward along the piston chamber. At this time, the pressurized gas is discharged from the first gas passage and the second gas passage. When the piston rod contacts the second seal, the through hole is blocked by the piston rod, and the first gas passage is blocked and closed. At this time, the pressurized gas can only be discharged from the second gas passage, forming a buffer, and the moving speed of the piston and piston rod is slowed down.

[0004] Furthermore: the inner plug includes: a first plug body having the through hole, the first main air channel and the first air channel, connecting the first sealing element and the second sealing element, and two first grooves are provided at intervals on the outer wall of the first plug body; And two fourth seals, one-to-one disposed in the first groove, forming a seal between the first plug body and the valve body.

[0005] Furthermore: the first main air channel or the first air passage is a cylindrical channel.

[0006] Furthermore, the inner diameter of the first main air channel is larger than the inner diameter of the first air channel.

[0007] Furthermore: the outer plug includes: a second plug body having the blind hole, the second main air channel and the second air channel, connected to the third sealing element, and two second grooves are provided at intervals on the outer wall of the second plug body; And two fifth seals, one-to-one disposed in the second groove, forming a seal between the second plug body and the valve body.

[0008] Furthermore: the second main air channel or the second air channel is a cylindrical channel.

[0009] Furthermore, the inner diameter of the second main air channel is larger than the inner diameter of the second air channel.

[0010] Furthermore, it also includes: an embedded hollow component disposed within the first air passage and the second air passage.

[0011] Furthermore: the embedded hollow component is a brass tube; The length of the embedded hollow component is less than the length of either the first air channel or the second air channel.

[0012] Furthermore, the length of the embedded hollow component is 5mm, and the inner diameter is 0.2mm or 0.3mm.

[0013] The above technical solution has the following beneficial effects: a gas buffer chamber structure, compared with related technologies, is provided with an inner plug and an outer plug; The inner plug is located in a cavity on the valve body. The inner plug has a through hole, a first main air passage and a first air passage. A first sealing element and a second sealing element are installed in the through hole. The outer plug is set in the cavity, and a piston cavity is formed between the outer plug and the inner plug. The outer plug has a blind hole, a second main air passage and a second air passage, and a third sealing element is set in the blind hole. When pressurized gas enters the first main gas passage, the pressurized gas pushes the piston and piston rod to move downward along the piston chamber. At this time, the pressurized gas is discharged through the blind hole, the second gas passage, and the second main gas passage. When the piston rod contacts the third seal, the blind hole is blocked by the piston rod. At this time, the pressurized gas can only be discharged through the second gas passage and the second main gas passage, forming a buffer and slowing down the movement speed of the piston and piston rod. When pressurized gas enters the second main gas passage, the pressurized gas pushes the piston and piston rod to move upward along the piston chamber. At this time, the pressurized gas is discharged through the through hole, the first gas passage and the first main gas passage. When the piston rod contacts the second seal, the through hole is blocked by the piston rod. At this time, the pressurized gas can only be discharged through the first gas passage and the first main gas passage, forming a buffer and slowing down the movement speed of the piston and piston rod. This prevents the piston from colliding with the outer or inner plug, reducing noise and extending service life. This overcomes the technical problems of relatively high noise and reduced service life, achieving the technical effect of reducing noise and extending service life, and is practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall assembly structure; Figure 2 This is a partial sectional view of the inner plug; Figure 3 This is a partial sectional view of the outer plug; Figure 4 A schematic diagram of the piston and piston rod; Figure 5 This is a structural schematic diagram of the piston rod, inner plug, first seal, and second seal. In the diagram: 10. Inner plug, 11. Through hole, 12. First main air passage, 13. First air passage, 10-1. First seal, 10-2. Second seal, 10-3. First plug body, 10-31. First groove, 10-4. Fourth seal, 20. Outer plug, 21. Blind hole, 22. Second main air passage, 23. Second air passage, 20-1. Third seal, 20-2. Second plug body, 20-21. Second groove, 20-3. Fifth seal, 30. Embedded hollow part, 100. Valve body, 101. Cavity, 102. Piston chamber, 200. Piston, 300. Piston rod, 301. Small diameter shaft section, 302. Large diameter shaft section. Detailed Implementation

[0015] To make the content easier to understand, the following detailed description is provided with reference to specific embodiments and accompanying drawings; A gas buffer chamber structure solves the technical problems of relatively high noise and reduced service life in related technologies. It can be manufactured and used, achieving the positive effects of reducing noise and extending service life. The overall concept is as follows: Implementation

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown; a gas buffer chamber structure, comprising: An inner plug 10 is disposed in a cavity 101 on a valve body 100. The inner plug 10 has a through hole 11, a first main air passage 12, and a first air passage 13. A first sealing element 10-1 and a second sealing element 10-2 are disposed in the through hole 11. The through hole 11 and the first air passage 13 are spaced apart. The through hole 11 and the first main air passage 12 form a first air passage, and the first air passage 13 and the first main air passage 12 form a second air passage. An outer plug 20 is disposed in the cavity 101, forming a piston cavity 102 between it and the inner plug 10. The outer plug 20 has a blind hole 21, a second main air passage 22, and a second air passage 23. A third sealing element 20-1 is disposed in the blind hole 21. The blind hole 21 and the second air passage 23 are spaced apart. The blind hole 21 and the second main air passage 22 form a third air passage, and the second air passage 23 and the second main air passage 22 form a fourth air passage. When pressurized gas enters the first main gas passage 12, the pressurized gas pushes the piston 200 and piston rod 300 to move downward along the piston chamber 102. At this time, the pressurized gas is discharged from the third gas passage and the fourth gas passage. When the piston rod 300 contacts the third seal 20-1, the blind hole 21 is blocked by the piston rod 300, and the third gas passage is blocked and closed. At this time, the pressurized gas can only be discharged from the fourth gas passage, forming a buffer, and the moving speed of the piston 200 and piston rod 300 is slowed down. When pressurized gas enters the second main gas passage 22, the pressurized gas pushes the piston 200 and the piston rod 300 to move upward along the piston chamber 102. At this time, the pressurized gas is discharged from the first gas passage and the second gas passage. When the piston rod 300 contacts the second seal 10-2, the through hole 11 is blocked by the piston rod 300, and the first gas passage is blocked and closed. At this time, the pressurized gas can only be discharged from the second gas passage, forming a buffer, and the moving speed of the piston 200 and the piston rod 300 is slowed down. When the pressurized gas is discharged from the third and fourth gas passages, it is changed to be discharged only from the fourth gas passage; or when the pressurized gas is discharged from the first and second gas passages, it is changed to be discharged only from the second gas passage. Because the amount of pressurized gas discharged is reduced, a buffer is formed, the moving speed of piston 200 is slowed down, and piston 200 will not collide when it contacts the outer plug 20 or the inner plug 10, thus achieving the purpose of reducing noise and extending service life. Another implementation method: like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown; in implementation, the inner plug 10 includes: a first plug body 10-3 having the through hole 11, the first main air passage 12 and the first air passage 13, connecting the first sealing member 10-1 and the second sealing member 10-2, and two first grooves 10-31 are spaced apart on the outer wall of the first plug body 10-3; and two fourth sealing members 10-4, which are disposed one-to-one in the first grooves 10-31 to form a seal between the first plug body 10-3 and the valve body 100; The through hole 11 is a stepped through hole, which is beneficial for setting the first seal 10-1 and the second seal 10-2, and will not affect the protrusion of one end of the piston rod 300; The first sealing element 10-1 is a commonly used structure in the prior art, such as a V-shaped sealing ring, which is used to encircle the small-diameter shaft section 301 on the piston rod 300 to ensure sealing and prevent gas leakage. The second seal 10-2 is a common structure in the prior art, such as an oil seal, used to encircle the large-diameter shaft section 302 on the piston rod 300. When the large-diameter shaft section 302 is encircled by the second seal 10-2, the through hole 11 is blocked by the piston rod 300, the first air passage is blocked and closed, and the pressurized gas can only be discharged through the second air passage, which slows down the movement speed of the piston 200 and forms a buffering effect. Moreover, when the second seal 10-2 is not in contact with the large-diameter shaft section 302, there will be a gap between the second seal 10-2 and the small-diameter shaft section 301, which will not affect the flow of pressurized gas through the first air passage. The first main gas channel 12 or the first gas channel 13 is a cylindrical channel, which is relatively easy to process and manufacture, and has relatively low frictional resistance with pressurized gas, which is conducive to the smooth flow of pressurized gas. The inner diameter of the first main air passage 12 is larger than that of the first air passage 13. By controlling the diameter, when the first air passage is blocked, pressurized gas enters the first air passage 13. Since the inner diameter of the first air passage 13 is relatively small, the speed of pressurized gas flow is slowed down, which slows down the movement speed of the piston 200, thus creating a buffering effect. Moreover, the inner diameter of the first main air passage 12 is larger than that of the first air passage 13, which also facilitates the continuous flow of pressurized gas and reduces the chance of jamming. The first plug body 10-3 is roughly cylindrical in shape, is located in the cavity 101, and is connected to the valve body 100, making assembly relatively convenient; The fourth sealing element 10-4 is an O-ring, which is set in the first groove 10-31 to form a seal between the first plug body 10-3 and the valve body 100, ensuring the sealing performance. This ensures that when pressurized gas enters or exits from the first main gas channel 12, it will not enter the cavity 101, but will flow through the air port (air nozzle) on the valve body 100. Another implementation method: like Figure 1 , Figure 3 , Figure 4 As shown; in implementation, the outer plug 20 includes: a second plug body 20-2 having the blind hole 21, the second main air passage 22 and the second air passage 23, connected to the third sealing member 20-1, and two second grooves 20-21 are spaced apart on the outer wall of the second plug body 20-2; and two fifth sealing members 20-3, one-to-one disposed in the second grooves 20-21, forming a seal between the second plug body 20-2 and the valve body 100; The blind hole 21 is a stepped hole, which is conducive to setting the third seal 20-1 and will not affect the end of the piston rod 300 to pass through. The piston rod 300 will not collide with the second plug body 20-2. The third seal 20-1 is a common structure in the prior art, such as an oil seal, used to encircle the large diameter shaft section 302 on the piston rod 300. When the large diameter shaft section 302 is encircled by the third seal 20-1, the blind hole 21 is blocked by the piston rod 300, the third air passage is blocked and closed, and the pressurized gas can only be discharged through the fourth air passage, which slows down the movement speed of the piston 200 and forms a buffering effect. The second main gas channel 22 or the second gas channel 23 is a cylindrical channel, which is relatively easy to process and manufacture, and has relatively low frictional resistance with pressurized gas, which is conducive to the smooth flow of pressurized gas. The inner diameter of the second main air passage 22 is larger than that of the second air passage 23. By controlling the diameter, when the third air passage is blocked, pressurized gas enters the second air passage 23. Since the inner diameter of the second air passage 23 is relatively small, the speed of pressurized gas flow is slowed down, which slows down the movement speed of the piston 200, thus creating a buffering effect. Moreover, the inner diameter of the second main air passage 22 is larger than that of the second air passage 23, which also facilitates the continuous flow of pressurized gas and reduces the chance of jamming. The second plug body 20-2 is roughly cylindrical in shape, is located in the cavity 101, and is connected to the valve body 100, making assembly relatively convenient. The fifth sealing element 20-3 is an O-ring, which is set in the second groove 20-21 to form a seal between the second plug body 20-2 and the valve body 100, ensuring the sealing performance. This ensures that when pressurized gas enters or exits through the second main gas channel 22, it will not enter the cavity 101, but will flow through the air port (air nozzle) on the valve body 100. Another implementation method: like Figure 1 , Figure 2 As shown; in practice, it also includes: an embedded hollow component 30, disposed within the first air passage 13 and the second air passage 23; The embedded hollow component 30 is a brass tube; The length of the embedded hollow component 30 is smaller than the length of the first air channel 13 or the second air channel 23. For example, the length of the embedded hollow component 30 is 5mm and the inner diameter is 0.2mm or 0.3mm, which is beneficial for the embedded hollow component 30 to be inserted into the first air channel 13 or the second air channel 23. The embedded hollow component 30 reduces the inner diameter of the first air passage 13 or the second air passage 23, slows down the flow of pressurized gas, and slows down the movement speed of the piston 200, thus creating a buffering effect. Regarding valve body 100, piston 200, and piston rod 300: See Figure 1 , Figure 4 , Figure 5 The valve body 100, piston 200, and piston rod 300 are common structures in the prior art. The cavity 101 is generally a stepped through hole, and the piston cavity 102 is a cylindrical cavity. These are not the inventive points of this invention, but are only used to better describe this invention and facilitate understanding of the technical solution of this invention. Those skilled in the art can directly and without doubt know how to set it up after seeing the disclosed content, without needing to expend creative labor or conduct excessive experiments. The working principle is as follows: When pressurized gas enters the first main gas passage 12, the pressurized gas first enters the piston chamber 102 through the first gas passage 13, pushing the piston 200 and piston rod 300 downwards along the piston chamber 102. At this time, the first seal 10-1 surrounds the small-diameter shaft section 301 on the piston rod 300, and the second seal 10-2 surrounds the large-diameter shaft section 302 on the piston rod 300, until the large-diameter shaft section 302 disengages from the second seal 10-2. The pressurized gas then enters the piston chamber 102 simultaneously through the first gas passage 13 and the through hole 11 (at this time, the first and second gas passages are simultaneously intake). 2. Accelerate the movement of piston 200 and piston rod 300. Pressurized gas is discharged through blind hole 21, second air passage 23 and second main air passage 22 (at this time, the third and fourth air passages exhaust gas simultaneously) until the large diameter shaft section 302 is contacted and surrounded by the third seal 20-1 (at this time, the distance between piston 200 and the second plug body 20-2 is about 7.15mm). The blind hole 21 is blocked by the large diameter shaft section 302. At this time, the pressurized gas can only be discharged through the second air passage 23 and the second main air passage 22, forming a buffer. The downward movement speed of piston 200 and piston rod 300 is slowed down. When pressurized gas enters through the second main gas passage 22, it first enters the piston chamber 102 through the second gas passage 23, pushing the piston 200 and piston rod 300 upwards along the piston chamber 102. The piston rod 300 also moves upwards along the third seal 20-1 and the first seal 10-1 until the large-diameter shaft section 302 disengages from the third seal 20-1. At this point, the small-diameter shaft section 301 remains surrounded by the first seal 10-1. Pressurized gas then enters the piston chamber 102 through the second gas passage 23 and the blind hole 21 (at this time, the third and fourth gas passages are simultaneously receiving gas), accelerating the movement of the piston 200 and piston rod 300. As the piston rod 300 moves, pressurized gas is discharged from the through hole 11, the first air passage 13, and the first main air passage 12 (at this time, the first and second air passages exhaust gas simultaneously) until the large-diameter shaft section 302 contacts the second seal 10-2. The second seal 10-2 surrounds the large-diameter shaft section 302 (at this time, the distance between the piston 200 and the first plug body 10-3 is about 7.15mm). The through hole 11 is blocked by the large-diameter shaft section 302. At this time, the pressurized gas can only be discharged from the first air passage 13 and the first main air passage 12, forming a buffer. The upward movement speed of the piston 200 and the piston rod 300 slows down. Because the piston 200 moves at a slower speed, it will not collide with the outer plug 20 or the inner plug 10 when it comes into contact (it will only slowly come into contact), which reduces noise and extends service life. In the description, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, and are only for the convenience or simplification of the description, rather than indicating a specific orientation that must be present; the operation process described in the embodiments is not an absolute usage step, and corresponding adjustments can be made in actual use; Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art; the words “first,” “second,” and similar terms used in the specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components, and similarly, the words “a” or “a” and similar terms do not determine a quantity limitation, but rather indicate the presence of at least one, as determined by the content of the embodiments; The above description is only a preferred embodiment, but the scope of protection is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the disclosed technology, based on the technical solution and inventive concept, should be included within the scope of protection.

Claims

1. A gas buffer chamber structure, characterized by, The valve comprises: an inner plug arranged in a cavity on a valve body, the inner plug having a through hole, a first main gas passage and a first secondary gas passage, the through hole being provided with a first seal and a second seal, the through hole being spaced apart from the first secondary gas passage, the through hole and the first main gas passage forming a first gas path, and the first secondary gas passage and the first main gas passage forming a second gas path; and an outer plug arranged in the cavity and forming a piston cavity with the inner plug, the outer plug having a blind hole, a second main gas passage and a second secondary gas passage, the blind hole being provided with a third seal, the blind hole being spaced apart from the second secondary gas passage, the blind hole and the second main gas passage forming a third gas path, and the second secondary gas passage and the second main gas passage forming a fourth gas path; when the first main gas passage is entered by pressurized gas, the pressurized gas pushes the piston and the piston rod to move downwards along the piston cavity, at this time, the pressurized gas is discharged from the third gas path and the fourth gas path, when the piston rod contacts the third seal, the blind hole is blocked by the piston rod, the third gas path is blocked and closed, at this time, the pressurized gas can only be discharged from the fourth gas path, forming a buffer, and the moving speed of the piston and the piston rod is slowed down; when the second main gas passage is entered by pressurized gas, the pressurized gas pushes the piston and the piston rod to move upwards along the piston cavity, at this time, the pressurized gas is discharged from the first gas path and the second gas path, when the piston rod contacts the second seal, the through hole is blocked by the piston rod, the first gas path is blocked and closed, at this time, the pressurized gas can only be discharged from the second gas path, forming a buffer, and the moving speed of the piston and the piston rod is slowed down.

2. The gas buffer chamber structure according to claim 1, wherein: The inner plug comprises: a first plug body having the through hole, the first main gas passage and the first secondary gas passage, connecting the first seal and the second seal, and the outer wall of the first plug body being spaced apart by two first grooves; and two fourth seals arranged in the first grooves one by one to form a seal between the first plug body and the valve body.

3. A gas buffer chamber structure according to claim 2, wherein: The first main gas passage or the first secondary gas passage is a cylindrical passage.

4. The gas buffer chamber structure according to claim 3, wherein: The inner diameter size of the first main gas passage is larger than that of the first secondary gas passage.

5. The gas buffer chamber structure according to claim 1, wherein: The outer plug comprises: a second plug body having the blind hole, the second main gas passage and the second secondary gas passage, connecting the third seal, and the outer wall of the second plug body being spaced apart by two second grooves; and two fifth seals arranged in the second grooves one by one to form a seal between the second plug body and the valve body.

6. A gas buffer chamber structure according to claim 5, wherein: The second main gas passage or the second secondary gas passage is a cylindrical passage.

7. A gas buffer chamber structure according to claim 6, wherein: The inner diameter size of the second main gas passage is larger than that of the second secondary gas passage.

8. A gas buffer chamber structure according to claim 4 or 7, characterized in that: Further comprising: an inner embedded hollow member arranged in the first secondary gas passage and the second secondary gas passage.

9. A gas buffer chamber structure according to claim 8, wherein: The inner embedded hollow member is a brass tube; The length dimension of the embedded hollow member is less than the length dimension of the first air passage or the second air passage.

10. A gas buffer chamber structure according to claim 9, wherein: The length dimension of the embedded hollow member is 5mm, and the inner diameter dimension is 0.2mm or 0.3mm.

Images