Two-stage angle valve with exhaust mitigation function

Abstract

Provides a two-stage angle valve with exhaust mitigation function. [Solution] The two-stage angle valve with exhaust mitigation function is composed of a valve body, a drive cylinder, a main piston, a gas propulsion passage, a sub-piston, a sub-spring, a valve stem, a main valve and a main spring. The valve body has an intake port and an exhaust port. The drive cylinder is overlapped on the valve body and connected to the valve body. The main piston has a sub-cylinder tube inside. The sub-piston is mounted in the sub-cylinder tube so that it can move up and down when driven by a driving force. The valve stem is fixed to the sub-piston and has a sub-valve. The main valve has a storage chamber, an exhaust mitigation passage and an exhaust mitigation hole. The valve stem is inserted into the main valve and can move the sub-valve up and down in the storage chamber. One end of the exhaust mitigation passage is connected to the storage chamber and the other end, i.e., an opening on the side of the main valve, is connected to the exhaust port. The exhaust mitigation hole is connected to the intake port.

Description

[Technical field]

[0001] The present invention relates to an angle valve, and more particularly to a two-stage angle valve with an exhaust mitigation function. [Background technology]

[0002] The two-stage angle valve disclosed in Patent Document 1 defines a relatively small first distance and a relatively large second distance in a first pipeline by controlling the stroke of an airtight valve, and subsequently controls the gas flow rate by the relatively small first distance and the relatively large second distance. In actual use, even if the stroke of the airtight valve is controlled, the difference between the gas flow rate corresponding to the first distance and the gas flow rate corresponding to the second distance is not very significant. This is because the open area of ​​the airtight valve is the same even if the strokes of the first interval and the second interval are different. That is, when the airtight valve is opened to the first distance, the gas flow rate is large enough, so even if the airtight valve is subsequently opened to the second distance, the difference in the gas flow rate does not change much.

[0003] The two-stage angle valve disclosed in Patent Document 2 improves on the above-mentioned technical problems, and controls the opening and closing of the main intake port and the auxiliary intake port by opening and closing the main valve and the sub-valve, with the diameter of the auxiliary intake port being smaller than the diameter of the main intake port. In actual use, the intake mitigation effect can be achieved by opening the auxiliary intake port to reduce the gas flow rate, and then opening the main intake port to increase the gas flow rate. However, the problem is that the main valve stem and the sub-valve stem must be operated by separate drive mechanisms; that is, the main valve stem must be driven by the main piston, and the sub-valve stem must be driven by the sub-piston. To adopt the above-mentioned drive system, it is necessary to attach a sub-valve stem inside the main valve stem and operate the two separately and smoothly while also sealing them with gaskets to keep them airtight, which makes the structure relatively complicated and the assembly work very difficult. In actual use, not only are component failures common, but gas may flow into the sub-valve during operation, causing a reaction in the sub-elastic return unit. In particular, if the gas is corrosive, the secondary elastic return unit may be damaged and broken down due to corrosion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Taiwan Patent No. I551797 [Patent Document 2] China CN 116817003A Publication Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT EMBODIMENT The main object of the present invention is to provide a two-stage angle valve with an exhaust mitigation function that can mitigate exhaust.

[0006] Another object of the present invention is to provide a two-stage angle valve with exhaust mitigation function that can simplify the structure and assembly work compared to the prior art by driving the sub-valve and the main valve with only one valve stem, thereby reducing component failures. [Means for solving the problem]

[0007] In order to solve the above problems, the two-stage angle valve with exhaust mitigation function of the present invention is composed of a valve body, a drive cylinder, a main piston, a gas thrust passage, a sub piston, a sub spring, a valve stem, a secondary gas thrust passage, a main valve and a main spring. The valve body has a lower intake port and a side exhaust port. The drive cylinder is placed on top of the valve body and is connected to the valve body. The main piston is mounted in the drive cylinder so that it can move up and down by receiving a driving force, and has a sub-cylinder tube formed with a recess at the top. A gas impingement passage is disposed in the drive cylinder leading to the interior of the drive cylinder and is simultaneously connected to an external controlled air source. The sub-piston is mounted in the sub-cylinder tube so that it can move up and down by receiving a driving force. The sub-spring is mounted in the drive cylinder, with both ends abutting against the drive cylinder and the sub-piston, respectively, and forcibly lowers the sub-piston by its elastic restoring force. The valve stem is fixed to the sub-piston at its top and has a sub-valve at its bottom. The valve stem extends downward a predetermined length and is mounted within the valve body so that it can move up and down through the main piston and drive cylinder together with the sub-piston. The auxiliary gas propelling passage is formed by connecting the auxiliary passage penetrating the drive cylinder, the gap between the valve stem and the drive cylinder, and the gas propelling passage disposed within the valve stem. The gas propelling passage of the valve stem is connected to the inside of the sub-cylinder tube, and the secondary passage is connected to an external secondary controlled air source device. The main valve has a storage chamber, an exhaust mitigation passage, upper and lower abutment portions located above and below the storage chamber, and an exhaust mitigation hole disposed in the lower abutment portion. The valve stem is inserted into the main valve and can move the sub-valve up and down inside the storage chamber. The exhaust relief passage is connected at one end to the storage chamber and at the other end, i.e. the opening on the side of the main valve, to the exhaust port. The exhaust relief hole is connected to the intake port. The main spring is disposed within the valve body and covering the valve stem, with both ends abutting the drive cylinder and the main valve separately, and forcibly lowering the main valve by its elastic restoring force. The sub-valve moves together with the valve stem in accordance with the up and down movement of the sub-piston. The valve stem moves between the lowest and highest positions in accordance with the movement of the sub-piston and the main piston. When the valve stem is set to the lowest position, the sub-valve abuts against the lower abutment portion of the storage chamber to close the exhaust relief hole. The main valve abuts against the valve body to close the intake port. That means there is no connection between the intake and exhaust ports. When the valve stem rises from the lowest position, separating the sub-valve from the lower abutment portion and moving to the upper abutment portion, the exhaust port communicates with the intake port via the exhaust mitigation passage, the storage chamber and the exhaust mitigation hole. When the valve stem is set to the highest position, the sub-valve abuts against the upper abutment portion of the storage chamber and then lifts the main valve to open the intake port, and at the same time connects the intake port and exhaust port to each other.

[0008] Due to the above-mentioned technical features, the present invention not only has an exhaust mitigation effect, but also allows the sub-valve and main valve to be driven by only one valve stem, which simplifies the structure and assembly work compared to the prior art and reduces component defects. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view showing a two-stage angle valve with an exhaust mitigation function according to one embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view taken along dashed line 2-2 in FIG. [Diagram 3] 3 is a cross-sectional view taken along dashed line 3-3 in FIG. [Figure 4] FIG. 4 is an enlarged view showing a portion of FIG. [Diagram 5] FIG. 2 is a schematic diagram showing an operating state of a two-stage angle valve with an exhaust mitigation function according to one embodiment of the present invention. [Figure 6] FIG. 6 is an enlarged view showing a portion of FIG. 5. [Figure 7] FIG. 2 is a schematic diagram showing another operating state of the two-stage angle valve with exhaust mitigation function according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a two-stage angle valve with an exhaust mitigation function according to the present invention will be described with reference to the drawings.

[0011] (One embodiment) 1 to 7, a two-stage angle valve 10 with an exhaust mitigation function according to one embodiment of the present invention is composed of a valve body 11, a drive cylinder 15, a main piston 21, a gas thrust passage 25, a sub-piston 31, a sub-spring 35, a valve stem 41, a sub-gas thrust passage 45, a main valve 51, and a main spring 55.

[0012] The valve body 11 has an intake port 12 on the lower side and an exhaust port 13 on the side.

[0013] The drive cylinder 15 overlaps the valve body 11 and is coupled to the valve body 11. For ease of manufacturing, the drive cylinder 15 is constructed by combining a cylinder lower part 151 and a cylinder upper part 152, and has a cylinder tube 153. The cylinder tube 153 is formed between the cylinder upper part 152 and the cylinder lower part 151. The valve body 11 is disposed in the cylinder lower part 151.

[0014] The main piston 21 is mounted in the drive cylinder 15 so as to be movable up and down by receiving a driving force, and has a sub-cylinder tube 213 formed in a recessed position at the top.

[0015] The gas propulsion passage 25 is disposed in the drive cylinder 15 so as to communicate with the interior of the drive cylinder 15 and is simultaneously connected to an external controlled air source device 91 . In this embodiment, the gas propelling passage 25 is disposed in the lower cylinder portion 151 .

[0016] The sub-piston 31 is mounted in the sub-cylinder tube 213 so as to be movable up and down by receiving a driving force.

[0017] The sub-spring 35 is mounted in the cylinder tube 153 of the drive cylinder 15, with both ends abutting against the cylinder upper portion 152 and the sub-piston 31, respectively, and forcibly lowering the sub-piston 31 by means of its elastic restoring force.

[0018] The valve stem 41 has its top fixed to the sub-piston 31 and has a sub-valve 42 at its bottom. The valve stem 41 extends downward to a predetermined length to pass through the cylinder lower part 151 and is mounted within the valve body 11 so as to be able to move up and down through the main piston 21 and the drive cylinder 15 together with the sub-piston 31.

[0019] The auxiliary gas propelling passage 45 is formed by connecting a sub-passage 451 penetrating the drive cylinder 15, a gap G between the valve stem 41 and the drive cylinder 15, and a gas propelling passage 411 arranged within the valve stem 41. The gas propelling passage 411 of the valve stem 41 is connected to the inside of the sub-cylinder tube 213 . The secondary passage 451 is connected to an external secondary controlled air source device 92 . In this embodiment, the bypass passage 451 is disposed in the cylinder lower portion 151 as an example.

[0020] The main valve 51 has a storage chamber 52, an exhaust mitigation passage 53, an upper abutment portion 511 and a lower abutment portion 512 located above and below the storage chamber 52, and an exhaust mitigation hole 513 arranged in the lower abutment portion 512. The valve stem 41 is inserted into the main valve 51 and can move the sub-valve 42 up and down within the storage chamber 52. One end of the exhaust relaxation passage 53 is connected to the storage chamber 52, and the other end, i.e., an opening on the side of the main valve 51, is connected to the exhaust port 13. The exhaust relaxation hole 513 is connected to the intake port 12. In this embodiment, the diameter of the exhaust relaxation passage 53 is smaller than the diameter of the intake port 12 . The diameter of the exhaust relaxation hole 513 is smaller than the diameter of the intake port 12 . In other words, since the diameter of the exhaust mitigation passage 53 and the exhaust mitigation hole 513 in the present invention is not large, the pressure difference between the intake port 12 and the exhaust port 13 can be mitigated by allowing only a small amount of working gas to pass per unit time.

[0021] The main spring 55 is disposed within the valve body 11 and covering the valve stem 41, with both ends abutting against the drive cylinder 15 and the main valve 51, respectively, and forcibly lowering the main valve 51 by its elastic restoring force. If the working gas is corrosive, an elastic sealing tube 56 can be added to prevent the main spring 55 from being eroded by the working gas. The elastic sealing tube 56 has both ends connected separately to the main valve 51 and the valve body 11 and covers the valve stem 41 and the main spring 55, thereby protecting them from contact with the external working gas.

[0022] The sub-valve 42 moves together with the valve stem 41 in accordance with the up and down movement of the sub-piston 31 . In this embodiment, the lower cylinder section 151 has an upper seal ring S1 and a lower seal ring S2. The upper seal ring S1 and the lower seal ring S2 are disposed so as to slidably cover the valve stem 41. Regardless of the operation of the valve stem 41, the connection position between the sub-passage 451 and the gap G is maintained between the upper seal ring S1 and the lower seal ring S2. The connecting position between the gas propelling passage 411 of the valve stem 41 and the gap G is maintained between the upper seal ring S1 and the lower seal ring S2.

[0023] The valve stem 41 moves between the lowest position LP and the highest position HP in accordance with the movement of the sub-piston 31 and the main piston 21. When the valve stem 41 is set at the lowest position LP, the sub-valve 42 abuts against the lower abutment portion 512 of the storage chamber 52 to close the exhaust relaxation hole 513 . The main valve 51 abuts against the valve body 11 to close the intake port 12 . In other words, the intake port 12 and the exhaust port 13 are not connected. When the valve stem 41 rises from the lowest position LP, separating the sub-valve 42 from the lower abutment portion 512 and moving it to the upper abutment portion 511, the exhaust port 13 connects to the intake port 12 via the exhaust mitigation passage 53, the storage chamber 52 and the exhaust mitigation hole 513. When the valve stem 41 is set to the highest position HP, the sub-valve 42 abuts against the upper abutment portion 511 of the storage chamber 52, lifts the main valve 51, opens the intake port 12, and at the same time connects the intake port 12 and the exhaust port 13 to each other.

[0024] The above is a description of the construction of this embodiment. The operating method of this embodiment proceeds in the order of closing, softening opening, and full opening. The gas within the inlet 12 of the valve body 11 is defined as the working gas. The operation of this embodiment will be described below.

[0025] As shown in FIGS. 2 and 3, when the valve stem 41 is set at the lowest position LP and maintained in a closed state, the main valve 51 closes the intake port 12. The sub-valve 42 closes the exhaust relief hole 513 .

[0026] As shown in FIG. 5, when the intake port 12 and the exhaust mitigation hole 513 are gradually opened under a closed state, air from the sub-control air source device 92 flows from the sub-gas propelling passage 45 into the sub-cylinder tube 213, causing the sub-piston 31 to rise relative to the main piston 21, so that the valve stem 41 rises together with the sub-piston 31 and at the same time raises the sub-valve 42, gradually opening the exhaust mitigation hole 513. As shown in FIG. 6, the working gas in the intake port 12 of the valve body 11 flows into the storage chamber 52 through the exhaust relaxation hole 513 and then flows through the exhaust relaxation passage 53 to the exhaust port 13 . Since the diameters of the exhaust relaxation passage 53 and the exhaust relaxation hole 513 are smaller than the diameter of the intake port 12 , only a small amount of working gas flows from the intake port 12 to the exhaust port 13 .

[0027] As shown in FIG. 7, when the intake port 12 and the exhaust relief hole 513 are continuously opened to the fully open state, the sub-piston 31 is raised to a predetermined height, and then air from the controlled air source device 91 (see FIG. 5) is sent from the gas propulsion passage 25 to the cylinder tube 153, so that the main piston 21 rises relative to the drive cylinder 15. The sub-piston 31 rises together with the main piston 21, and at the same time, causes the valve stem 41 and the sub-valve 42 to rise. When the sub-valve 42 abuts against the upper abutment portion 511 as shown in FIG. 6 and the main valve 51 is lifted to open the intake port 12 , the working gas flows smoothly from the intake port 12 to the exhaust port 13 .

[0028] As shown in FIG. 3, when the controlled air source device 91 and the sub-controlled air source device 92 suck in gas and return to the closed state, the elastic restoring forces of the main spring 55 and the sub spring 35 forcibly lower the main valve 51 and the sub valve 42, which also lower the main piston 21 and the sub piston 31, returning them to the closed state.

[0029] To sum up the above description, this embodiment can effectively ease exhaust from the stage where exhaust is eased to the stage where exhaust is completely released at the time of start-up. In addition, since the present invention can drive the sub-valve 42 and the main valve 51 separately by aligning only one valve stem 41 with both the sub-valve 42 and the main valve 51 at a time, the structure and assembly work are simpler than in the prior art, and malfunctions of parts that drive the main valve stem and sub-valve stem separately, as in the prior art, are reduced.

[0030] In the present invention, the structural relationship is not limited to that shown in the drawings, and the arrangement positions may be reversed up and down or horizontally.

[0031] As described above, the present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit of the invention. [Explanation of symbols]

[0032] 10: Two-stage angle valve with exhaust mitigation function 11: Valve body 12: Air intake 13: Exhaust port 15: Drive cylinder 151: Lower cylinder 152: Upper part of cylinder 153: Cylinder tube 21: Main piston 213: Sub-cylinder tube 25: Gas propulsion passage 31: Sub piston 35: Sub-spring 41: Valve stem 411: Gas propulsion passage 42: Sub valve 45: Secondary gas propulsion passage 451:Sub-passage 51: Main valve 511: Upper contact part 512: Lower contact part 513: Exhaust relief hole 52: Storage Room 53: Exhaust relief passage 55: Main spring 56: Elastic sealed tube 91: Controlled air source device 92: Secondary control air source unit G: Gap HP: Highest rank LP:Lowest S1: Upper seal ring S2: Lower seal ring

Claims

1. It is composed of a valve body, a drive cylinder, a main piston, a gas thrust passage, a sub-piston, a sub-spring, a valve stem, a sub-gas thrust passage, a main valve and a main spring. The valve body has a lower intake port and a side exhaust port, the drive cylinder overlaps the valve body and is coupled to the valve body; The main piston is mounted in the drive cylinder so as to be movable up and down by receiving a driving force, and has a sub-cylinder tube formed with a recess at the top thereof, The gas driving passage is disposed in the drive cylinder so as to communicate with the interior of the drive cylinder, and is simultaneously connected to an external controlled air source device; The sub-piston is mounted in the sub-cylinder tube so as to be movable up and down by receiving a driving force, the sub-spring is mounted in the drive cylinder, both ends of which are in contact with the drive cylinder and the sub-piston, respectively, and forcibly moves the sub-piston downward by an elastic restoring force; the valve stem is fixed to the sub-piston at its top and has a sub-valve at its bottom, the valve stem extends downward to a predetermined length, and is mounted within the valve body so as to be movable up and down through the main piston and the drive cylinder together with the sub-piston; the auxiliary gas thrust passage is formed by connecting a sub-passage penetrating the drive cylinder, a gap between the valve stem and the drive cylinder, and a gas thrust passage disposed within the valve stem; The gas propelling passage of the valve stem is connected to the inside of the sub-cylinder tube, and the secondary passage is connected to an external secondary controlled air source device; the main valve has a storage chamber, an exhaust mitigation passage, an upper contact portion and a lower contact portion located above and below the storage chamber, and an exhaust mitigation hole disposed in the lower contact portion, The valve stem is inserted into the main valve and can move the sub-valve up and down in the storage chamber; one end of the exhaust relaxation passage is connected to the storage chamber, and the other end, i.e., an opening on a side surface of the main valve, is connected to the exhaust port, and the exhaust relaxation hole is connected to the intake port, the main spring is disposed in the valve body and over the valve stem, with both ends abutting the drive cylinder and the main valve separately, and forcibly lowering the main valve by elastic restoring force; The sub-valve moves together with the valve stem in accordance with the up and down movement of the sub-piston, the valve stem moves between a lowest position and a highest position in accordance with the movement of the sub-piston and the main piston; When the valve stem is set to the lowest position, the sub-valve abuts against the lower abutment portion of the storage chamber to close the exhaust relaxation hole, and the main valve abuts against the valve body to close the intake port, so that the intake port and the exhaust port are maintained in a state where they are not in communication with each other, when the valve stem rises from the lowest position, separates the sub-valve from the lower contact portion, and moves to the upper contact portion, the exhaust port communicates with the intake port via the exhaust mitigation passage, the storage chamber, and the exhaust mitigation hole, A two-stage angle valve with exhaust mitigation function, characterized in that when the valve stem is installed in the highest position, the sub-valve abuts against the upper abutment portion of the storage chamber, lifts the main valve to open the intake port, and at the same time connects the intake port and the exhaust port to each other.

2. 2. The two-stage angle valve with exhaust mitigation function according to claim 1, wherein the diameter of the exhaust mitigation passage is smaller than the diameter of the intake port.

3. 2. The two-stage angle valve with exhaust mitigation function according to claim 1, wherein the diameter of the exhaust mitigation hole is smaller than the diameter of the intake port.

4. Further comprising an elastic sealing tube; 2. The two-stage angle valve with exhaust mitigation function according to claim 1, wherein the elastic sealing tube has both ends connected to the main valve and the valve body separately, and covers the valve stem and the main spring.

5. The drive cylinder is constructed by combining a lower cylinder portion and an upper cylinder portion, and has a cylinder tube, and the cylinder tube is formed between the upper cylinder portion and the lower cylinder portion; The valve body is disposed at a lower portion of the cylinder, the main piston and the sub-spring are mounted within the cylinder tube; 2. The two-stage angle valve with exhaust mitigation function according to claim 1, wherein the valve stem passes through the lower part of the cylinder.

6. 6. The two-stage angle valve with exhaust mitigation function as claimed in claim 5, wherein the gas propelling passage and the sub-passage are disposed in the lower part of the cylinder.

7. the cylinder lower portion has an upper seal ring and a lower seal ring, the upper seal ring and the lower seal ring being slidably disposed over the valve stem; a connecting position between the sub-passage and the gap is maintained between the upper seal ring and the lower seal ring, 7. The two-stage angle valve with exhaust mitigation function as described in claim 6, wherein a connecting position between the gas thrust passage of the valve stem and the gap is maintained between the upper seal ring and the lower seal ring.

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