Pressure reducing and stabilizing valve

Abstract

The utility model discloses a kind of pressure-reducing pressure stabilizing valves, including base, upper cover, metal diaphragm, installation groove, flow-limiting seat, flow-limiting needle, flow-limiting spring, air inlet, air outlet, small fixed disc, large fixed disc and pressure applying module.Upper cover is located at the top of base;Metal diaphragm is fixed between the two, and is enclosed with base to form sealed space;Installation groove is located in base and is communicated with sealed space;Flow-limiting seat is located on installation groove, with flow-limiting hole;Flow-limiting needle top is inserted into flow-limiting hole, bottom has annular flow-limiting piece;Flow-limiting spring is supported between installation groove bottom wall and flow-limiting needle bottom;Air inlet, air outlet are respectively communicated installation groove and sealed space;Small, large fixed disc is separately arranged below and above metal diaphragm, small fixed disc top end passes through diaphragm and connects large fixed disc, bottom end contacts flow-limiting needle;Pressure applying module is installed on upper cover, and predetermined pressure is applied to large fixed disc, diaphragm and small fixed disc.Metal diaphragm is used, with good corrosion resistance, high elasticity, long service life, good sealing.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing and stabilizing valve technology, and in particular to a pressure reducing and stabilizing valve. Background Technology

[0002] Pressure reducing and stabilizing valves are key equipment in gas delivery systems, used to stably reduce the pressure of high-pressure gas sources and provide safe and constant gas to downstream equipment.

[0003] However, existing pressure reducing valves have significant shortcomings in high-end applications: Poor sealing reliability: Traditional valves use non-metallic sealing materials such as rubber, which are prone to aging and wear, leading to gas leakage and affecting purity and safety.

[0004] Micro-flow control is difficult: existing regulating mechanisms are crude and cannot accurately and stably control extremely low flow rates (such as below 100 ml / min), making it difficult to meet the requirements of high-precision processes. Summary of the Invention

[0005] According to an embodiment of the present utility model, a pressure reducing and stabilizing valve is provided, comprising: a base, a top cover, a metal diaphragm, a mounting groove, a flow limiting seat, a flow limiting needle, a flow limiting spring, an air inlet, an air outlet, a small fixed plate, a large fixed plate, and a pressure application module. The top cover is placed on top of the base; A metal diaphragm is fixed between the base and the top cover, forming a sealed space with the base; The mounting slot is located inside the base and is connected to the sealed space. The flow-limiting seat is set on the mounting groove. The flow-limiting seat is provided with a flow-limiting hole and an air outlet hole. The air outlet hole is connected to the flow-limiting hole. The top of the flow-limiting needle passes through the flow-limiting hole, and the bottom of the flow-limiting needle is provided with an annular flow-limiting element; The current-limiting spring is located between the bottom inner wall of the mounting groove and the bottom of the current-limiting needle; The air inlet and air outlet are located on the base. The air inlet is connected to the mounting groove, and the air outlet is connected to the sealed space. The small fixed plate and the large fixed plate are respectively set at the bottom and top of the metal diaphragm. The top of the small fixed plate passes through the metal diaphragm and is connected to the large fixed plate. The bottom of the small fixed plate is in contact with the top of the flow-limiting needle. The pressure module is located on the top cover and applies a preset pressure to the large fixed plate, the metal diaphragm, and the small fixed plate.

[0006] Furthermore, it also includes: grooves and O-rings; The groove is formed at the top of the base; The O-ring is placed inside the groove.

[0007] Furthermore, the pressure application module includes: a threaded seat, a nut, a screw, and a first spring; The top of the threaded seat penetrates through the top cover, and both the outer and inner walls of the threaded seat are threaded. The nut is threaded onto the outer wall of the threaded seat, locking the threaded seat onto the top cover; The screw is threaded onto the inner wall of the threaded seat; The first spring is positioned between the screw and the large fixed plate.

[0008] Furthermore, it also includes: a first channel and a second channel; The first channel is located inside the base, connecting the mounting slot and the air inlet; The second channel is located inside the base, connecting the sealed space and the air outlet.

[0009] Furthermore, a sealing ring is provided between the current-limiting seat and the mounting groove.

[0010] Furthermore, the top cover and the base are secured together with four screws.

[0011] A pressure reducing and stabilizing valve according to an embodiment of the present utility model has the following beneficial effects: 1. It adopts a metal diaphragm, which has the characteristics of corrosion resistance, high elasticity and long service life, ensuring sealing performance.

[0012] 2. The flow rate can be adjusted by controlling the distance between the annular flow limiting element on the bottom periphery of the flow limiting needle and the flow limiting seat. This allows for micro-flow adjustment of 0-100ml / min with an accuracy of 0.01ml.

[0013] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a pressure reducing and stabilizing valve according to an embodiment of the present utility model.

[0015] Figure 2 This is a cross-sectional view of a pressure reducing and stabilizing valve according to an embodiment of the present invention.

[0016] Figure 3 This is an exploded structural diagram of the flow-limiting seat and flow-limiting needle in a pressure-reducing and pressure-stabilizing valve according to an embodiment of the present invention.

[0017] Figure 4 This is a cross-sectional view of the flow-limiting seat and flow-limiting needle in a pressure-reducing and pressure-stabilizing valve according to an embodiment of the present invention. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0019] First, combine Figures 1-4 This invention describes a pressure reducing and stabilizing valve according to an embodiment of the present invention, which is used to reduce and stabilize the pressure of gas and has a wide range of applications.

[0020] like Figures 1-4 As shown, a pressure reducing and stabilizing valve according to an embodiment of the present invention has a base 1, a top cover 2, a metal diaphragm 3, a mounting groove 4, a flow limiting seat 5, a flow limiting needle 6, a flow limiting spring 7, an air inlet 8, an air outlet 9, a small fixed plate 10, a large fixed plate 11, and a pressure application module.

[0021] Specifically, such as Figures 1-2 As shown, the top cover 2 is placed on top of the base 1.

[0022] Specifically, such as Figure 2 As shown, the metal diaphragm 3 is fixed between the base 1 and the top cover 2, forming a sealed space 301 with the base 1. Using a metal diaphragm can improve service life and ensure sealing performance.

[0023] Specifically, such as Figure 2 As shown, the mounting groove 4 is opened inside the base 1, and the mounting groove 4 is connected to the sealing space 301.

[0024] Specifically, such as Figures 2-4 As shown, the flow limiting seat 5 is installed on the mounting groove 4. The flow limiting seat 5 is provided with a flow limiting hole 501 and an air outlet 502. The air outlet 502 is connected to the flow limiting hole 501. The gas passing through the flow limiting hole 501 is transported to the sealed space 301 through the air outlet 502.

[0025] Specifically, such as Figures 2-4 As shown, the top of the flow limiting needle 6 passes through the flow limiting hole 501, and the bottom periphery of the flow limiting needle 6 is provided with an annular flow limiting element 601.

[0026] Specifically, such as Figure 2 As shown, the flow-limiting spring 7 is disposed between the bottom inner wall of the mounting groove 4 and the bottom of the flow-limiting needle 6, and is used to apply elastic force to the flow-limiting needle 6.

[0027] Specifically, such as Figure 2 As shown, the air inlet 8 and the air outlet 9 are located on the base 1. The air inlet 8 is connected to the mounting groove 4, and the air outlet 9 is connected to the sealing space 301. The air inlet 8 and the air outlet 9 are used for air intake and air exhaust, respectively.

[0028] Specifically, such as Figure 2As shown, the small fixed plate 10 and the large fixed plate 11 are respectively disposed at the bottom and top of the metal diaphragm 3. The top end of the small fixed plate 10 passes through the metal diaphragm 3 and is connected to the large fixed plate 11. The bottom end of the small fixed plate 10 contacts the top end of the flow limiting needle 6.

[0029] Specifically, such as Figure 2 As shown, a pressure-applying module is mounted on the upper cover 2 and applies a preset pressure to the large fixed plate 11, the metal diaphragm 3, and the small fixed plate 10. The pressure-applying module includes a threaded seat 121, a nut 122, a screw 123, and a first spring 124. The top of the threaded seat 121 penetrates the upper cover 2, and both its outer and inner walls are threaded. The nut 122 is threaded onto the outer wall of the threaded seat 121, locking it to the upper cover 2. The screw 123 is threaded onto the inner wall of the threaded seat 121. The first spring 124 is positioned between the screw 123 and the large fixed plate 11. During assembly, the threaded seat 121 is installed from the inside of the upper cover 2 towards the outside, and then locked from the outside by the nut 122. By turning the screw 123, the first spring 124 can be compressed, thereby causing the large fixed plate 11, the metal diaphragm 3 and the small fixed plate 10 to be pressed down together, which in turn drives the flow limiting needle 6 to be pressed down, thus adjusting the position of the flow limiting needle 6.

[0030] Furthermore, such as Figures 1-2 As shown, a pressure reducing and stabilizing valve according to an embodiment of the present invention further includes: a groove 13 and an O-ring 14. The groove 13 is formed on the top of the base 1, and the groove 13 is used to install the O-ring 14; the O-ring 14 is disposed in the groove 13 to ensure sealing performance.

[0031] Furthermore, such as Figures 1-2 As shown, a pressure reducing and stabilizing valve according to an embodiment of the present invention further includes: a first channel 15 and a second channel 16; the first channel 15 is opened inside the base 1 and connects the mounting groove 4 and the air inlet 8; the second channel 16 is opened inside the base 1 and connects the sealing space 301 and the air outlet 9.

[0032] Furthermore, such as Figures 1-2 As shown, a sealing ring (not shown in the figure) is provided between the flow-limiting seat 5 and the mounting groove 4 to ensure sealing performance.

[0033] Furthermore, such as Figures 1-2 As shown, the top cover 2 and the base 1 are fixed together by four screws 17, which facilitates disassembly and assembly.

[0034] It should be noted that the pressure reducing and stabilizing valve mainly relies on the distance between the annular flow limiting element 601 on the bottom periphery and the flow limiting seat 5. The bottom of the flow limiting needle 6 is equipped with an annular flow limiting element 601, which is similar to a double-layer cylindrical structure.

[0035] When the pressure reducing and stabilizing valve is in the closed state, the flow limiting spring 7 will cause the annular flow limiting element 601 on the bottom periphery of the flow limiting needle 6 to be tightly attached to the bottom of the base 1 of the flow limiting needle 6, thereby closing the pressure reducing and stabilizing valve.

[0036] When flow rate adjustment is required, rotating screw 123 compresses the first spring 124, causing the large fixed plate 11, metal diaphragm 3, and small fixed plate 10 to be pressed down together, which in turn presses down the flow-limiting needle 6, adjusting the position of the flow-limiting needle 6. That is, adjusting the distance between the annular flow-limiting element 601 on the bottom periphery of the flow-limiting needle 6 and the base 1 of the flow-limiting needle 6 adjusts the flow rate.

[0037] Above, refer to Figures 1-4 A pressure reducing and regulating valve according to an embodiment of the present invention is described, which has the following beneficial effects: 1. The metal diaphragm 3 is used, which has the characteristics of corrosion resistance, high elasticity and long service life, ensuring sealing performance.

[0038] 2. The flow rate can be adjusted by controlling the distance between the annular flow limiting element 601 on the bottom periphery of the flow limiting needle 6 and the flow limiting seat 5. The flow rate can be adjusted from 0 to 100 ml / min with an accuracy of 0.01 ml.

[0039] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A pressure reducing and regulating valve, characterized in that, Includes: base, top cover, metal diaphragm, mounting slot, flow limiting seat, flow limiting pin, flow limiting spring, air inlet, air outlet, small fixing plate, large fixing plate, and pressure application module; The upper cover is provided on top of the base; The metal diaphragm is fixed between the base and the upper cover, forming a sealed space with the base; The mounting groove is formed inside the base and communicates with the sealed space. The flow-limiting seat is disposed on the mounting groove, and the flow-limiting seat is provided with a flow-limiting hole and an air outlet hole, the air outlet hole being connected to the flow-limiting hole; The top of the flow-limiting needle passes through the flow-limiting hole, and an annular flow-limiting element is provided on the bottom periphery of the flow-limiting needle; The current-limiting spring is disposed between the bottom inner wall of the mounting groove and the bottom of the current-limiting needle; The air inlet and the air outlet are located on the base. The air inlet is connected to the mounting groove, and the air outlet is connected to the sealed space. The small fixing plate and the large fixing plate are respectively disposed at the bottom and top of the metal diaphragm. The top end of the small fixing plate passes through the metal diaphragm and is connected to the large fixing plate. The bottom end of the small fixing plate contacts the top end of the flow-limiting needle. The pressure application module is mounted on the upper cover and applies a preset pressure to the large fixed plate, the metal diaphragm, and the small fixed plate.

2. The pressure reducing and regulating valve as described in claim 1, characterized in that, It also includes: grooves and O-rings; The groove is formed on the top of the base; The O-ring is disposed within the groove.

3. The pressure reducing and regulating valve as described in claim 1, characterized in that, The pressure application module includes: a threaded seat, a nut, a screw, and a first spring; The top end of the threaded seat penetrates the upper cover, and both the outer and inner walls of the threaded seat are provided with threads; The nut is threaded onto the outer wall of the threaded seat, locking the threaded seat onto the upper cover; The screw is threaded onto the inner wall of the threaded seat; The first spring is disposed between the screw and the large fixed plate.

4. The pressure reducing and regulating valve as described in claim 1, characterized in that, It also includes: the first channel and the second channel; The first channel is formed inside the base and connects the mounting slot and the air inlet; The second channel is formed inside the base, connecting the sealed space and the air outlet.

5. The pressure reducing and regulating valve as described in claim 1, characterized in that, A sealing ring is provided between the current limiting seat and the mounting groove.

6. The pressure reducing and regulating valve as described in claim 1, characterized in that, The top cover and the base are fixed together by four screws.

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