Gas pressure reducing valve
By designing multiple sealing rings and a gas guiding mechanism in the gas pressure reducing valve, and utilizing the combination of narrow gaps and small holes, the problem of poor pressure reducing effect of existing pressure reducing valves is solved, and a highly efficient gas pressure reducing effect is achieved.
Patent Information
- Application Number
- CN202520382734.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Existing gas pressure reducing valves have complex structures and limited orifice or slit positions, resulting in poor pressure reduction performance.
By designing a multi-layered sealing ring and gas guiding mechanism, including a sleeve, upper push rod, lower push rod, first elastic element and bottom cylinder, multiple narrow gaps and small holes are formed to achieve efficient gas decompression.
It effectively reduces gas pressure, improves system efficiency, reduces energy consumption, and achieves efficient pressure reduction.
Smart Images
Figure CN223662586U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pressure reducing device technical field especially relates to a pressure reducing valve for gas delivery. BACKGROUND
[0002] The gas pressure reducing valve is a kind of equipment widely used in industrial field, its function is to reduce the high-pressure gas to the low pressure level required. Gas pressure reducing valve is widely used in industry, petroleum, chemical industry, natural gas delivery, construction and other fields. The pressure reducing valve changes the throttling area of the gas inlet, so that the flow rate and the kinetic energy of fluid change to cause different pressure losses, so as to achieve the purpose of pressure reduction, specifically, after gas enters, it flows through a small hole or slit, the flow of gas through this narrow channel makes the gas flow rate increase, the pressure reduces, thereby realizing the reduction of overall pressure.
[0003] The existing gas pressure reducing valve structure is relatively complex, but the position of the small hole or slit is limited, the pressure reducing effect is limited, which leads to poor actual use effect. UTILITY MODEL CONTENT
[0004] The utility model discloses a gas pressure reducing valve, the gas circulating through the gas containing area passes through the narrow gap of the gas guide mechanism inner flow channel and the narrow gap between the outer side wall of bottom cylinder and the inner side wall of lower cavity and flows out through the outlet, and the cooperation of multiple narrow gaps and small holes can effectively reduce the pressure of gas.
[0005] To achieve the above object, the utility model adopts the technical scheme of a gas pressure reducing valve, comprising:
[0006] An outer shell is formed with an upper cavity and a lower cavity in communication, and the outer shell is provided with an inlet and an outlet in communication with the upper cavity and the lower cavity respectively,
[0007] An adjusting mechanism is arranged on the outer shell and extends into the upper cavity,
[0008] A gas guide mechanism is arranged in the lower cavity below the adjusting mechanism, comprising a sleeve, an upper jack, a guide sleeve, a lower jack, a first elastic member and a bottom cylinder, the bottom cylinder is arranged in the lower cavity and is provided with an outlet hole in communication with the lower cavity, the sleeve is arranged on the bottom cylinder and is in communication with the bottom cylinder, the guide sleeve is arranged on the sleeve and has a gas guide hole penetrating the body, the upper jack is arranged in the gas guide hole with a horizontal gap, and the upper end abuts against the adjusting mechanism, the lower jack is arranged in the sleeve, the lower end abuts against the bottom cylinder through the first elastic member, the upper end blocks the lower end of the gas guide hole and abuts against the lower end of the upper jack.
[0009] As a further optimization, the bottom cylinder is provided with a support step on its surrounding side wall. The lower part of the sleeve is fitted onto the bottom cylinder and abuts against the support step, which can achieve precise positioning and installation of the sleeve with the bottom cylinder.
[0010] As a further optimization, the upper rod includes a thick rod and a thin rod disposed at the lower end of the thick rod, and the air guide hole includes a connected thick hole and a narrow hole, with the thin rod extending into the narrow hole.
[0011] As a further optimization, the lower push rod includes a blocking rod and a limiting rod disposed at the lower end of the blocking rod. The blocking rod abuts against the lower end of the guide sleeve and blocks the air vent. One end of the first elastic element is sleeved on the limiting rod.
[0012] As a further optimization, the upper end face of the lower push rod has an arc-shaped structure, which is beneficial for sealing the lower end of the air guide hole.
[0013] As a further optimization, the inlet includes a horizontal opening and a vertical opening. One end of the vertical opening is connected to the horizontal opening, and the other end is connected to the upper cavity and is located below the adjustment mechanism. The cooperation of the horizontal opening and the vertical opening can, on the one hand, extend upward to connect with the gas containing area, and on the other hand, the bent path is conducive to depressurization of the gas.
[0014] As a further optimization, the adjustment mechanism includes an adjustment rod screw, an adjustment block, a guide ring, and a second elastic element. The adjustment rod is rotatably mounted on the outer shell, the guide ring is fixed in the upper cavity, the adjustment block is movable up and down in the guide ring, and its upper end is connected to the adjustment screw through the second elastic element. The upper push rod abuts against the lower end of the adjustment block.
[0015] As a further optimization, the upper and lower parts of the upper cavity sidewall are respectively provided with a first limiting step and a second limiting step. The lower end of the guide ring abuts against the second limiting step, and its upper end is provided with a pressure ring. The upper end of the pressure ring abuts against the lower end of the first limiting step, so as to fix the guide ring in the upper cavity.
[0016] As a further optimization, a sealing ring is provided between the adjusting block and the guide ring.
[0017] As a further optimization, a sealing ring is provided between the adjustment mechanism and the side wall of the upper cavity, and / or between the sleeve and the side wall of the lower cavity.
[0018] The above-mentioned method of adding multiple layers of sealing rings can reduce pressure loss in pipelines, improve system efficiency, and reduce energy consumption.
[0019] As a further optimization, the outer shell is provided with a test port for connecting pressure testing equipment, which communicates with the lower cavity.
[0020] Compared with the prior art, the present invention has the following beneficial effects: the gas circulating in the gas containing area flows out through the narrow gap in the flow channel of the gas guiding mechanism and the narrow gap between the outer wall of the bottom cylinder and the inner wall of the lower cavity through the outlet. The combination of multiple narrow gaps and small holes can effectively reduce the gas pressure and achieve efficient pressure reduction. Attached Figure Description
[0021] Figure 1 This is a structural diagram of the present invention.
[0022] Figure 2 This is a cross-sectional view of the present invention.
[0023] Figure 3 This is a schematic diagram of the connection between the adjustment mechanism and the air guiding mechanism of this utility model.
[0024] Figure 4 This is a structural diagram of the air guiding mechanism of this utility model.
[0025] Figure 5 This is an exploded view of the gas guiding mechanism of this utility model.
[0026] Figure 6 This is a structural diagram of the bottom cylinder of this utility model.
[0027] Figure 7 This is a schematic diagram of the lower shell of this utility model.
[0028] Figure 8 This is a schematic diagram of gas flow when this invention is applied. Detailed Implementation
[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0030] like Figures 1 to 6As shown, a gas pressure reducing valve includes a housing 10, an adjusting mechanism 20, and a gas guiding mechanism 30. The housing 10 is formed by connecting a lower housing 11 and an upper housing 12. After the connection, an upper cavity 10a and a lower cavity 10b are formed inside the housing 10. The upper cavity 10a extends from inside the upper housing 12 to inside the lower housing 11, and the lower cavity 10b is located in the lower part of the lower housing 11. The housing 10 (specifically the lower housing 11) is provided with an inlet 101 and an outlet 102 that are respectively connected to the upper cavity 10a and the lower cavity 10b. Located at the lower part of the lower shell 11, it has a bent shape and connects to the lower part of the upper cavity 10a. The outlet 102 is located at the lower part of the lower shell 11 and has a horizontal shape, connecting to the lower part of the lower cavity 10b. The adjusting mechanism 20 is disposed on the outer shell 10, and its lower end extends into the upper cavity 10a to the lower part of the upper cavity 10a. The air guiding mechanism 30 is disposed in the lower cavity 10b and is located below the adjusting mechanism 20. The air guiding mechanism 30 includes a sleeve 31, an upper push rod 32, a guide sleeve 33, a lower push rod 34, a first elastic element 35, and a bottom cylinder 36. The bottom cylinder 36 is disposed within the lower cavity 10b, and has a recess 360 and an outlet 361 communicating with the lower cavity 10b. The outlet 361 connects the recess and the lower cavity 10b. A sleeve 31 is disposed on the bottom cylinder 36, and the two are connected. The sleeve 31 has a receiving cavity 310 penetrating its body, which communicates with the recess 360. A guide sleeve 33 is disposed on the sleeve 31 and has a vent hole 330 penetrating its body. The lower part of the guide sleeve 33 extends into the receiving cavity 310, and its upper end connects with the adjusting mechanism. A gas-containing area 100 is formed between the lower ends of the adjustment mechanism 20. The upper push rod 32 is set in the air guide hole 330 with a horizontal gap. The horizontal gap between the two forms a flow channel 300 through which gas can pass. The upper end of the upper push rod 32 abuts against the lower end of the adjustment mechanism 20. The lower push rod 34 is located in the sleeve 31. Its lower end abuts against the bottom cylinder 36 through the first elastic member 35. The first elastic member 35 can be a spring. The upper end of the lower push rod blocks the lower end of the air guide hole 330 and abuts against the lower end of the upper push rod 32.
[0031] In this invention, the lower end of the adjusting mechanism 20 abuts against the upper end of the upper push rod 32. The upper push rod 32 extends into the air guide hole 330 and abuts against the upper end of the lower push rod 34. The lower push rod 34 is supported by the first elastic member 35, so that its upper end simultaneously blocks the lower end of the air guide hole 330. Based on the above structure, the following path for gas flow is formed in the lower shell 11: gas enters the inlet 101, flows to the gas receiving area 100, enters the air guide hole 330 (i.e., the flow channel 300), flows out of the flow channel 300 after being moved down by the lower push rod 34, enters the receiving cavity 310, enters the groove 360, and flows out of the bottom cylinder 36 through the outlet hole 361, or enters the lower cavity 10b and flows out through the outlet 102, or flows out directly through the outlet 102. Figure 8As shown, based on the gas flow path described above, when using this utility model, the upper push rod 32 is driven to move down by the adjusting mechanism 20, which in turn drives the lower push rod 34 to move down. The upper end of the lower push rod 34 disengages from the gas guide hole 330, thereby opening the flow channel 300 and connecting the gas receiving area 100 and the receiving cavity 310. During the flow process, the gas flows through a small hole or slit (such as the flow channel 300). The flow area of the small hole or slit is relatively small. When the gas flows through this narrow channel, the flow velocity increases. The increase in flow velocity causes the local pressure to decrease. Therefore, the gas pressure will decrease in this local area (gas guide mechanism 30), thereby achieving a reduction in the overall pressure.
[0032] In this invention, the gas enters the gas-containing area 100 in the upper cavity 10a through the inlet 101, and flows out through the outlet 102 through the narrow gap (slit) formed by the flow channel 300 in the gas guiding mechanism 30 and the narrow gap (slit) between the outer wall of the bottom cylinder 36 and the inner wall of the lower cavity 10b. The combination of multiple narrow gaps (slits) and small holes can effectively reduce the gas pressure and achieve efficient pressure reduction.
[0033] like Figure 6 As shown, a support step 362 is provided on the side wall of the bottom cylinder 36. The lower part of the sleeve 31 is fitted onto the bottom cylinder 36 and abuts against the support step 362. This facilitates the positioning and engagement between the sleeve 31 and the bottom cylinder 36, and also ensures the sealing effect between them.
[0034] The upper rod 32 includes a thick rod 321 and a thin rod 322 disposed at the lower end of the thick rod 321. The air guide hole 330 includes a coarse hole and a narrow hole (not shown) that are connected to each other. The thick rod 321 moves in the coarse hole, and there is a gap between the side walls of the two. The thin rod 322 extends into the narrow hole, and there is also a gap between the side walls of the two. The above gaps form a flow channel 300. Due to the setting of the narrow hole, the thick rod 321 cannot extend into the narrow hole, and the downward position of the thick rod 321 can be limited.
[0035] The lower push rod 34 includes a blocking rod 341 and a limiting rod 342 disposed at the lower end of the blocking rod 341. The blocking rod 341 abuts against the lower end of the guide sleeve 33 and blocks the air vent 330, and can abut against the upper push rod 32 (i.e. the thin rod 322). The first elastic element 35 can be a spring, one end of which is sleeved on the limiting rod 342 and can abut against the lower end of the blocking rod 341. When the adjustment mechanism 20 is adjusted so that the upper push rod 32 is moved downward under force, the lower push rod 34 is pressed down through the force transmission and displacement, causing it to disengage from the air guide hole 330 and opening the flow channel 300. At this time, the lower push rod 34 is pressed down, causing the first elastic element 35 to compress. When the adjustment mechanism 20 is readjusted and reset, the downward pressure decreases and gradually disappears. The elastic recovery of the first elastic element 35 pushes the lower push rod 34 and the upper push rod 32 upward, eventually causing the upper end of the lower push rod 34 to block the air guide hole 330 and close the flow channel 300. At this time, the upper end of the lower push rod 34 and the lower end of the upper push rod 32 are still in contact.
[0036] Preferably, the upper end face of the lower push rod 34 (i.e., the sealing rod 341) has an arc-shaped structure, specifically an upwardly convex arc surface, which can better achieve the sealing of the lower end of the air guide hole 330.
[0037] like Figure 7 As shown, the inlet 101 includes a horizontal opening 1011 and a vertical opening 1012. One end (lower end) of the vertical opening 1012 is connected to the horizontal opening 1011, and the other end (upper end) is connected to the upper cavity 10a, that is, connected to the gas containing area 100, and is located below the regulating mechanism 20.
[0038] The adjustment mechanism 30 includes an adjustment rod screw 21, an adjustment block 22, a guide ring 23, and a second elastic element 24. The adjustment rod 21 is rotatably mounted on the upper shell 12, the guide ring 23 is fixed in the upper cavity 10a, and the adjustment block 22 is movable within the guide ring 23. Its upper end is connected to the adjustment rod 21 via the second elastic element 24, which can be a spring. The upper end of the upper push rod 32 abuts against the lower end of the adjustment block 22. When operation is required, rotating the adjustment screw 21 compresses the second elastic element 24. The compression and force transmission of the second elastic element 24 press down on the adjustment block 22, causing it to move downwards and drive the upper push rod 32 downwards to open the flow channel 300. When the adjustment screw 21 is rotated in the opposite direction, the second elastic element 24 tends to return to its original shape, and the adjustment block 22 moves upwards and resets under the action of the first elastic element 35.
[0039] The upper end of the adjusting block 22 is connected to the top block 221, and the lower end of the second elastic element 24 is sleeved on the top block 221; the guide ring 23 needs to be fixedly installed, and its installation method is as follows: the upper and lower parts of the side wall of the upper cavity 10a are respectively provided with a first limiting step 121 and a second limiting step 111, that is, the first limiting step 121 is set in the upper shell 12, the second limiting step 111 is set in the lower shell 11, and the lower end of the guide ring 23 abuts against the second limiting step 111. The upper end is provided with a pressure ring 13, the upper end of which abuts against the lower end of the first limiting step 121. Through the joint abutment and support of the pressure ring 13 and the two limiting steps, the guide ring 23 can be stably installed in the upper cavity 10a. Furthermore, an auxiliary step 112 can be provided in the upper cavity 10a above the second limiting step 111. The outer side of the lower end of the pressure ring 13 abuts against the auxiliary step 112, and the inner side of the lower end of the pressure ring 13 presses down on the upper end of the guide ring 23.
[0040] Furthermore, to ensure overall sealing, a first sealing ring 201 is provided between the adjusting block 22 and the guide ring 23, and a second sealing ring 202 is provided between the adjusting mechanism 20 (i.e., the guide ring 23) and the side wall of the upper cavity 10a. This can ensure the sealing of the gas containing area 100 and the lower cavity 10b. A third sealing ring (not shown) is provided between the sleeve 31 and the side wall of the lower cavity 10b. This can ensure the sealing of the lower cavity 10b and the gas guiding mechanism 30.
[0041] Additionally, a test port 103 for connecting a pressure testing device can be provided on the lower shell 11 and connected to the lower cavity 10b. When the gas flows out through the gas guiding mechanism 20, that is, after it flows out through the outlet 361 on the bottom cylinder 36, the gas flows in the narrow gap between the side wall of the bottom cylinder 36 and the side wall of the lower cavity 10b. The pressure of the gas after depressurization is monitored by the pressure testing device on the test port 103 connected to the narrow gap.
[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A gas pressure reducing valve, characterized in that, include: The outer shell has an internally formed upper cavity and a lower cavity that are connected to each other, and the outer shell is provided with an inlet and an outlet that are respectively connected to the upper cavity and the lower cavity. The adjustment mechanism is located on the outer casing, with its lower end extending into the upper cavity. An air guiding mechanism is disposed in the lower cavity and located below the adjusting mechanism. The air guiding mechanism includes a sleeve, an upper push rod, a guide sleeve, a lower push rod, a first elastic element, and a bottom cylinder. The bottom cylinder is disposed in the lower cavity and has an outlet hole communicating with the lower cavity. The sleeve is disposed on the bottom cylinder and the two are connected. The guide sleeve is disposed on the sleeve and has an air guiding hole penetrating its body. The upper push rod is disposed in the air guiding hole with a horizontal gap, and its upper end abuts against the adjusting mechanism. The lower push rod is located in the sleeve, and its lower end abuts against the bottom cylinder through the first elastic element. Its upper end blocks the lower end of the air guiding hole and abuts against the lower end of the upper push rod.
2. The gas pressure reducing valve according to claim 1, characterized in that, The bottom cylinder has a supporting step on its side wall, and the lower part of the sleeve is fitted onto the bottom cylinder and abuts against the supporting step.
3. The gas pressure reducing valve according to claim 1, characterized in that, The upper rod includes a thick rod and a thin rod disposed at the lower end of the thick rod. The air guide hole includes a thick hole and a narrow hole that are connected to each other, and the thin rod extends into the narrow hole.
4. The gas pressure reducing valve according to claim 1 or 3, characterized in that, The lower push rod includes a sealing rod and a limiting rod disposed at the lower end of the sealing rod. The sealing rod abuts against the lower end of the guide sleeve and blocks the air vent. One end of the first elastic element is sleeved on the limiting rod.
5. The gas pressure reducing valve according to claim 4, characterized in that, The upper end face of the lower push rod has an arc-shaped structure.
6. The gas pressure reducing valve according to claim 1, characterized in that, The inlet includes a horizontal opening and a vertical opening. One end of the vertical opening is connected to the horizontal opening, and the other end is connected to the upper cavity, and it is located below the adjustment mechanism.
7. The gas pressure reducing valve according to claim 1, characterized in that, The adjustment mechanism includes an adjustment rod screw, an adjustment block, a guide ring, and a second elastic element. The adjustment rod is rotatably mounted on the outer shell, the guide ring is fixed in the upper cavity, the adjustment block is movable up and down in the guide ring, and its upper end is connected to the adjustment screw through the second elastic element. The upper push rod abuts against the lower end of the adjustment block.
8. The gas pressure reducing valve according to claim 7, characterized in that, A sealing ring is provided between the adjusting block and the guide ring.
9. The gas pressure reducing valve according to claim 1 or 8, characterized in that, A sealing ring is provided between the adjustment mechanism and the side wall of the upper cavity, and / or between the sleeve and the side wall of the lower cavity.
10. The gas pressure reducing valve according to claim 1, characterized in that, The outer shell is provided with a test port that communicates with the lower cavity for connecting pressure testing equipment.