High-precision pressure stabilizing device for industrial gas meter

Abstract

The utility model provides industrial gas metering table high accuracy voltage stabilizing device relates to gas voltage stabilizing technical field, including main valve body, upper pressure module and middle lift valve stem, the upper portion fixed connection of main valve body has upper pressure module, the middle part of main valve body is connected with the middle lift valve stem and has the sliding, the middle part of main valve body is provided with middle valve seat, both sides of middle valve seat all are seted up with side valve seat, the both sides of main valve body are seted up with inflow port and outflow port respectively, the inboard bottom of main valve body is fixedly connected with bottom limit block. The scanner need not to install, only need to open the buckle cover to use when using, the rough adjustment of middle valve seat big flow, the supplementary fine adjustment of side valve seat to small flow, realize the accurate regulation of flow and pressure, solved single valve core big diameter when the regulation lag of big flow, single valve core big diameter small flow is easy to cause pressure oscillation, pressure fluctuation is big, and single valve core small diameter under the condition of big flow will appear the problem of gas supply shortage and pressure sudden drop.

Description

Technical Field

[0001] This utility model relates to the field of gas pressure stabilization equipment technology, and in particular to a high-precision pressure stabilization device for industrial gas meters. Background Technology

[0002] The pressure stabilizing device, connected in series with the front end of the meter, stabilizes the fluctuating gas pressure in the upstream pipeline within the rated pressure range that is compatible with the meter and downstream gas-consuming equipment, ensuring metering accuracy, equipment safety, and gas supply stability.

[0003] Existing pressure stabilizing devices cannot simultaneously adapt to high flow rates and fine-tune low flow rates with a single valve core. A single valve core with a large diameter will cause lag in adjustment at high flow rates, while a single valve core with a large diameter will cause large pressure fluctuations at low flow rates, which can easily lead to pressure oscillations. On the other hand, a single valve core with a small diameter will cause insufficient gas supply and sudden pressure drops under high flow conditions. Summary of the Invention

[0004] This utility model provides a high-precision pressure stabilizing device for industrial gas meters. The middle valve seat and the side valve seat are responsible for regulating different flow ranges. The middle valve seat is used for coarse adjustment of large flow, and the side valve seat is used for fine adjustment of small flow, so as to realize precise regulation of flow and pressure, improve the stability of gas pressure, and reduce pressure overshoot and oscillation.

[0005] This utility model provides a high-precision pressure stabilizing device for industrial gas meters, specifically including a main valve body, an upper pressure module, and a middle lifting valve stem. The upper pressure module is fixedly connected to the upper part of the main valve body, and the middle lifting valve stem is slidably connected through the middle of the main valve body and is provided with sealing packing. A middle valve seat is provided in the middle of the main valve body. The middle valve seat adopts a large-diameter flow design and is specifically responsible for the coarse adjustment of the main flow rate, quickly responding to the instantaneous large flow demand of sudden changes in upstream pressure and the start-up of downstream equipment. Side valve seats are provided on both sides of the middle valve seat. An inlet port and an outlet port are respectively provided on both sides of the main valve body. The inlet port is used to connect to upstream gas, and the outlet port is used to output stable pressure gas to the meter. A bottom limit block is fixedly connected to the bottom inner side of the main valve body.

[0006] Furthermore, the lower part of the upper pressure module is fixedly connected to a side connecting pipe, and a middle diaphragm is fixedly connected to the inner side of the middle part of the upper pressure module. The middle diaphragm is made of deformable rubber material. When the middle diaphragm is pulled by pressure, the lifting valve rod moves up and down. An upper support spring is fixedly connected to the top of the middle diaphragm. The upper support spring provides the pre-tightening force for pressure regulation and sets the target stable pressure value. The upper end of the upper support spring is fixedly connected to the upper connecting plate, and an upper threaded rod is threadedly connected to the upper part of the upper pressure module.

[0007] Furthermore, the lower end of the upper threaded rod is rotatably connected to the upper connecting plate. The upper threaded rod pushes the upper connecting plate to move axially to adjust the preload of the upper support spring. The side connecting pipe is located below the middle diaphragm, so that the outlet pressure acts directly on the bottom of the middle diaphragm. When the pressure at the outlet port is lower than the set value, the pressure at the bottom of the middle diaphragm is less than the preload of the top upper support spring. The upper support spring pushes the diaphragm to move downward, causing the middle lifting valve rod to move downward synchronously.

[0008] Furthermore, the tail end of the side connecting pipe is connected to the outlet port, and the side connecting pipe transmits the stable pressure signal from the outlet port to the inside of the upper pressure module. The bottom of the middle diaphragm and the upper end of the middle lifting valve rod are fixedly connected. The upper support spring pushes the middle diaphragm to move downward, and the middle lifting valve rod moves downward synchronously, thus driving the middle lifting valve rod to move downward synchronously.

[0009] Furthermore, a central sealing block is axially slidably connected to the lower end of the central lifting valve stem, and side sealing blocks are fixedly connected to both sides of the bottom of the central lifting valve stem, with a bottom sealing plate fixedly connected to the bottom of the side sealing blocks.

[0010] Furthermore, the central sealing block is located inside the central valve seat, and the outer edge sealing gasket of the central sealing block and the inner sealing ring of the central valve seat are fitted together to achieve sealing. The bottom limiting block is located below the central sealing block, and the side sealing block is located inside the side valve seat. The side sealing block and the bottom sealing plate move downward away from the side valve seat to increase the main flow cross-sectional area.

[0011] Furthermore, the outer edge of the side sealing block and the inner wall of the side valve seat are spaced apart, the side sealing block is located inside the side valve seat to reduce the flow rate, the top of the bottom sealing plate is aligned with the bottom of the side valve seat, and the bottom sealing plate and the bottom of the side valve seat are fitted together to achieve a seal. The side valve seat adopts a small-diameter flow design to supplement and finely adjust the flow rate.

[0012] This utility model provides a high-precision pressure stabilizing device for industrial gas meters, which has the following beneficial effects: The middle valve seat and the side valve seat are responsible for regulating different flow ranges. The middle valve seat is used for coarse adjustment of large flow rates, while the side valve seat is used for fine adjustment of small flow rates. This achieves more precise regulation of flow and pressure, improves the stability of gas pressure, reduces pressure overshoot and oscillation, extends the service life of downstream industrial equipment, reduces maintenance costs, avoids the situation where a single valve core cannot simultaneously adapt to large flow rates and fine adjust small flow rates, and prevents large pressure fluctuations. This avoids metering deviations caused by pressure fluctuations and ensures fair metering for both supply and demand sides. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0014] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0015] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2 This invention provides a schematic diagram showing a partial cross-section of the main valve body and the upper pressure module. Figure 3 A schematic diagram of the diaphragm structure of this application is shown; Figure 4 A schematic diagram of the bottom limit block structure of this application is shown; Figure 5 A schematic diagram of the structure of the valve seat in this application is shown; Figure 6 A schematic diagram of the structure of the lifting valve stem in this application is shown; Figure label: 1. Main valve body; 101. Middle valve seat; 102. Side valve seat; 103. Inlet port; 104. Outlet port; 105. Bottom limit block; 2. Upper pressure module; 201. Side connecting pipe; 202. Middle diaphragm; 203. Upper support spring; 204. Upper connecting plate; 205. Upper threaded rod; 3. Middle lifting valve stem; 301. Middle sealing block; 302. Side sealing block; 303. Bottom sealing plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] Example 1: Please refer to Figures 1 to 6 : This utility model proposes a high-precision pressure stabilizing device for industrial gas meters, including a main valve body 1, an upper pressure module 2, and a middle lifting valve stem 3. A middle valve seat 101 is located in the middle of the main valve body 1. The middle valve seat 101 adopts a large-diameter flow design, specifically designed for coarse adjustment of the main flow rate, quickly responding to sudden changes in upstream pressure and the instantaneous high flow rate demand of downstream equipment startup. Side valve seats 102 are provided on both sides of the middle valve seat 101. An inlet port 103 and an outlet port 104 are respectively provided on both sides of the main valve body 1. The inlet port 103 is used to connect to the upstream gas pipeline, and the outlet port 104 is used to output stable pressure gas to the meter. A bottom limit block 105 is fixedly connected to the inner bottom of the valve body 1. An upper pressure module 2 is fixedly connected to the upper part of the main valve body 1. A side connecting pipe 201 is fixedly connected to the lower part of the upper pressure module 2. A middle diaphragm 202 is fixedly connected to the inner side of the middle part of the upper pressure module 2. The middle diaphragm 202 is made of deformable rubber. When the middle diaphragm 202 is pulled by pressure, the lifting valve rod 3 moves up and down. An upper support spring 203 is fixedly connected to the top of the middle diaphragm 202. The upper support spring 203 provides the pre-tightening force for pressure regulation and sets the target stable pressure value. The upper end of the upper support spring 203 is fixedly connected to the upper connecting plate 204. The upper part of block 2 is threadedly connected to an upper threaded rod 205. The lower end of the upper threaded rod 205 is rotatably connected to the upper connecting plate 204. The upper threaded rod 205 pushes the upper connecting plate 204 to move axially to adjust the preload of the upper support spring 203. The side connecting pipe 201 is located below the middle diaphragm 202, so that the outlet pressure acts directly on the bottom of the middle diaphragm 202. When the pressure at the outlet port 104 is lower than the set value, the pressure at the bottom of the middle diaphragm 202 is less than the preload of the top upper support spring 203. The upper support spring 203 pushes the diaphragm downward, causing the middle lifting valve rod 3 to move downward synchronously. The middle part of the main valve body 1 is slidably connected to the middle support spring 203. The lifting valve stem 3 is equipped with sealing packing. The lower end of the lifting valve stem 3 is axially slidably connected to a central sealing block 301. Side sealing blocks 302 are fixedly connected to both sides of the bottom of the lifting valve stem 3. A bottom sealing plate 303 is fixedly connected to the bottom of the side sealing blocks 302. The central sealing block 301 is located inside the central valve seat 101. The outer edge sealing gasket of the central sealing block 301 and the inner sealing ring of the central valve seat 101 are fitted together to achieve sealing. The bottom limit block 105 is located below the central sealing block 301. The side sealing blocks 302 are located inside the side valve seat 102. The side sealing blocks 302 and the bottom sealing plate 303 move downward away from the side valve seat 102 to increase the cross-sectional area of ​​the main flow.

[0018] In this embodiment, the tail end of the side connecting pipe 201 is connected to the outlet port 104. The side connecting pipe 201 transmits the stable pressure signal from the outlet port 104 to the inside of the upper pressure module 2. The bottom of the middle diaphragm 202 is fixedly connected to the upper end of the middle lifting valve stem 3. The upper support spring 203 pushes the middle diaphragm 202 to move downward. The upper support spring 203 pushes the middle diaphragm 202 to move downward, causing the middle lifting valve stem 3 to move downward synchronously.

[0019] In this embodiment, the outer edge of the side sealing block 302 and the inner wall of the side valve seat 102 are spaced apart. The side sealing block 302 is located inside the side valve seat 102 to reduce the flow rate. The top of the bottom sealing plate 303 is aligned with the bottom of the side valve seat 102. The bottom sealing plate 303 and the bottom of the side valve seat 102 are fitted together to achieve a seal. The side valve seat 102 adopts a small-diameter flow design to supplement and finely adjust the flow rate. The side valve seat 102 compensates for the pressure deviation after the coarse adjustment of the middle valve seat 101, so as to achieve more precise regulation of flow rate and pressure, improve the stability of gas pressure, and reduce pressure overshoot and oscillation.

[0020] In this second embodiment, based on the first embodiment, the number of side valve seats 102 can be adjusted as needed. The number of side sealing blocks 302 and bottom sealing plates 303 are matched with the number of side valve seats 102. The instantaneous flow rate is increased by increasing the number of side valve seats 102 to meet different flow requirements.

[0021] The working principle of this embodiment: Upstream gas enters the main valve body 1 from the inlet port 103, passes through the gap between the middle valve seat 101 and the middle sealing block 301, and the gap between the side valve seat 102 and the side sealing block 302 and the bottom sealing plate 303, and is then output to the industrial gas meter from the outlet port 104; by rotating the upper threaded rod 205, the upper connecting plate 204 is pushed up and down, adjusting the preload of the upper support spring 203 and setting the outlet target stable pressure value; when the pressure at the outlet port 104 is lower than the set value, the pressure at the bottom of the middle diaphragm 202 is less than the preload of the top upper support spring 203, and the upper support spring 203 pushes the middle diaphragm 202 downward, causing the middle lifting valve rod 3 to move down synchronously, the middle sealing block 301 moves downward away from the middle valve seat 101, and the side sealing block 301 moves away from the middle valve seat 102. 2. The bottom sealing plate 303 moves downward away from the side valve seat 102, increasing the cross-sectional area of ​​the main flow and causing the outlet pressure to rise rapidly. When the pressure approaches the set value, the middle sealing block 301 and the bottom limit block 105 stop and cannot continue to move. The side sealing block 302 and the bottom sealing plate 303 continue to move downward away from the side valve seat 102. The side sealing block 302 and the bottom sealing plate 303 further fine-tune the change in the cross-sectional area of ​​the side valve seat 102. When the outlet pressure is higher than the set value, the pressure acts on the bottom of the middle diaphragm 202 through the side connecting pipe 201, pushing the middle diaphragm 202 to move upward, which drives the middle lifting valve stem 3 to move upward synchronously. First, the side sealing block 302 and the bottom sealing plate 303 are moved for coarse adjustment, and then the middle sealing block 301 is moved for coarse adjustment to reduce the pressure, so as to achieve a rapid pressure drop. The central valve seat 101 adopts a large-diameter flow design, specifically designed for coarse adjustment of the main flow rate. It quickly responds to sudden changes in upstream pressure and the instantaneous high flow rate demand of downstream equipment startup, avoiding the problems of insufficient gas supply and sudden pressure drop under high flow conditions caused by traditional single-valve-core small-diameter designs. The side valve seat 102 adopts a small-diameter flow design for supplementary fine adjustment of the flow rate, compensating for the pressure deviation after coarse adjustment of the central valve seat 101. This achieves more precise regulation of flow rate and pressure, improves the stability of gas pressure, reduces pressure overshoot and oscillation, extends the service life of downstream industrial equipment, reduces maintenance costs, and avoids the inability of a single valve core to simultaneously adapt to large flow rates and fine adjust small flow rates, resulting in large pressure fluctuations. It also avoids metering deviations caused by pressure fluctuations, ensuring fair metering for both supply and demand. Stable pressure output can prevent the flame from fluctuating in intensity during gas combustion, improving the thermal efficiency of downstream burners, kilns, and other equipment. The dual-valve-seat architecture reduces the adjustment load of a single valve core, reduces wear on the valve core and seat, extends the service life of the device itself, and further reduces the operation and maintenance costs of the industrial gas system.

[0022] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only involve structures relevant to the embodiments disclosed herein; other structures may refer to general designs.

[0023] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0024] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. High-precision pressure stabilizing device for industrial gas meters, including: The main valve body (1), the upper pressure module (2), and the middle lifting valve stem (3) are characterized in that the upper pressure module (2) is fixedly connected to the upper part of the main valve body (1), the middle lifting valve stem (3) is slidably connected through the middle part of the main valve body (1), the middle valve seat (101) is provided in the middle part of the main valve body (1), the side valve seats (102) are provided on both sides of the middle valve seat (101), the inflow port (103) and the outflow port (104) are respectively provided on both sides of the main valve body (1), and the bottom limit block (105) is fixedly connected to the bottom of the inner side of the main valve body (1).

2. The high-precision pressure stabilizing device for industrial gas meters according to claim 1, characterized in that, The lower part of the upper pressure module (2) is fixedly connected to a side connecting pipe (201), the middle inner side of the upper pressure module (2) is fixedly connected to a middle diaphragm (202), the top of the middle diaphragm (202) is fixedly connected to an upper support spring (203), the upper end of the upper support spring (203) is fixedly connected to an upper connecting plate (204), and the upper part of the upper pressure module (2) is threadedly connected to an upper threaded rod (205).

3. The high-precision pressure stabilizing device for industrial gas meters according to claim 2, characterized in that, The lower end of the upper threaded rod (205) is rotatably connected to the upper connecting plate (204), and the side connecting pipe (201) is located below the middle diaphragm (202).

4. The high-precision pressure stabilizing device for industrial gas meters according to claim 3, characterized in that, The tail end of the side connecting pipe (201) is connected to the outlet port (104), and the bottom of the middle diaphragm (202) is fixedly connected to the upper end of the middle lifting valve stem (3).

5. The high-precision pressure stabilizing device for industrial gas meters according to claim 1, characterized in that, The lower end of the middle lifting valve stem (3) is axially slidably connected to a middle sealing block (301), and both sides of the bottom of the middle lifting valve stem (3) are fixedly connected to side sealing blocks (302), and the bottom of the side sealing blocks (302) is fixedly connected to a bottom sealing plate (303).

6. The high-precision pressure stabilizing device for industrial gas meters according to claim 5, characterized in that, The central sealing block (301) is located inside the central valve seat (101), the bottom limiting block (105) is located below the central sealing block (301), and the side sealing block (302) is located inside the side valve seat (102).

7. The high-precision pressure stabilizing device for industrial gas meters according to claim 6, characterized in that, The outer edge of the side sealing block (302) and the inner wall of the side valve seat (102) are spaced apart, and the top of the bottom sealing plate (303) and the bottom of the side valve seat (102) are aligned.

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