CN219606157U - Pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation - Google Patents
Pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation Download PDFInfo
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- CN219606157U CN219606157U CN202223253208.3U CN202223253208U CN219606157U CN 219606157 U CN219606157 U CN 219606157U CN 202223253208 U CN202223253208 U CN 202223253208U CN 219606157 U CN219606157 U CN 219606157U
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- valve
- spring
- pressure
- pressure reducing
- sleeve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The utility model discloses a pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation, which comprises a pressure reducing valve main valve, wherein the pressure reducing valve main valve is provided with a control cavity, the pressure reducing valve main valve is fixedly connected with a pilot valve, the inlet end of the pressure reducing valve main valve is respectively connected with a first interface of the control cavity and the pilot valve after passing through an adjustable throttle valve, and the outlet end of the pressure reducing valve main valve is connected with a second interface of the pilot valve through a stop valve. The utility model uses the change of the opening of the main valve opening when the flow changes to control the opening of the valve opening of the pilot valve, so that the output pressure of the main valve of the pressure reducing valve is in forward fluctuation along with the output flow, the risks of water leakage and pipe explosion of the pipeline are reduced, and the resource waste and the maintenance cost are saved.
Description
Technical Field
The utility model relates to the technical field of pressure reducing valves, in particular to a pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation.
Background
When the fluid is depressurized through a conventional pressure relief valve, its output pressure is substantially unchanged, which is necessary in many cases, but is undesirable in some situations; for example, when a common pressure reducing valve is used, the output pressure after pressure reduction must be equal to or greater than the water pressure at the time of water peak, but in practice, such high water pressure is not required at the time of water valley, but the output pressure of the pressure reducing valve is not changed by flow fluctuation, so that the whole water supply pipeline, especially the bottom pipeline, still needs to bear high pressure at the time of water valley, the pipeline leakage and pipe explosion risks are increased, resources are wasted, and maintenance cost is increased.
Disclosure of Invention
The utility model solves the problem that the output pressure of a common pressure reducing valve cannot positively fluctuate along with the fluctuation of output flow, so that a water supply pipeline still needs to bear high pressure when water is low, and provides the pressure reducing valve with the positively fluctuating output pressure along with the fluctuation of output flow.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a relief pressure valve that output pressure is forward fluctuation along with output flow fluctuation, includes the relief pressure valve main valve, the relief pressure valve main valve is equipped with the control chamber, the fixedly connected with pilot valve in relief pressure valve main valve top, the entrance point of relief pressure valve main valve is through adjustable throttle valve back with the first interface connection of control chamber and pilot valve respectively, the exit end of relief pressure valve main valve is through the second interface connection of stop valve and pilot valve.
In the utility model, the interface of the main valve of the pressure reducing valve is connected with the interface of the pilot valve through a pipeline, so that the effect that the output pressure of the main valve of the pressure reducing valve positively fluctuates along with the output flow is realized; specifically, the inlet end of the main valve of the pressure reducing valve is connected with the control cavity of the pressure reducing valve and the first interface of the pilot valve respectively after passing through the adjustable throttle valve through corresponding pipelines, and the outlet end of the main valve of the pressure reducing valve is connected with the second interface of the pilot valve after passing through the stop valve through corresponding pipelines.
Preferably, the main valve of the pressure reducing valve further comprises a valve rod, a push rod is arranged above the valve rod, an O-shaped sealing ring is arranged on the outer diameter of the push rod, a gasket is sleeved above the push rod, and a check ring for positioning is arranged above the gasket.
In the utility model, the top of the push rod is provided with a small stepped shaft, the small stepped shaft is used for sleeving a gasket, and after sleeving, a check ring is used for positioning.
Preferably, the pilot valve comprises a lower valve body and a sleeve arranged in a valve cavity of the lower valve body, an outer convex ring is arranged at the bottom of the sleeve, a long groove is arranged at the position, above the outer convex ring, of the sleeve, and a through hole is formed in the top of the sleeve.
In the utility model, the sleeve is of a structure with an outer convex ring at the bottom, the outer convex ring supports the first spring, and the spring head of the second spring is inserted into the long groove to prevent the second spring from rotating.
Preferably, a second spring and a plunger are arranged in the inner cavity of the sleeve, one end of the second spring is abutted with the gasket, and a spring head of the second spring is inserted into the long groove; the plunger is arranged above the inner cavity of the sleeve and is abutted to the top surface of the sleeve, an inner hexagonal blind hole is formed in the top end of the plunger, the plunger is movably connected with the inner cavity of the sleeve, and the other end of the second spring is screwed with the spiral groove on the surface of the plunger.
In the utility model, a plunger arranged in a sleeve can rotate, and specifically, the pitch and the depth of a bolt groove are respectively matched with the pitch and the wire diameter of a second spring; the plunger is rotated to enable a portion of the number of turns of the second spring to enter or exit the helical groove, thereby changing the effective number of turns of the second spring to change the stiffness of the second spring.
Preferably, the sleeve further comprises a first spring arranged above the outer convex ring of the sleeve, the first spring is sleeved on the outer surface of the sleeve, and the end face of the first spring abuts against the outer convex ring of the sleeve.
Preferably, a boss is arranged at the top end of an upper valve cover of the main valve of the pressure reducing valve, the boss is in threaded connection with a lower valve body of the pilot valve, an inner thread is arranged in an inner hole of the boss, and an outer thread is arranged at the bottom of the lower valve body of the pilot valve.
In the utility model, after the boss at the top end of the upper valve cover of the main valve of the pressure reducing valve is connected with the lower valve body of the pilot valve, the vertical center line of the main valve of the pressure reducing valve is consistent with the vertical center line of the pilot valve.
Preferably, the stiffness of the first spring is larger than that of the second spring, and the wire diameter of the second spring is matched with the width of the long groove.
In the utility model, the stiffness of the first spring is larger than that of the second spring, so that the force acting on the first spring is relatively smaller, and the change of the opening of the valve port of the pilot valve is smaller than that of the main valve.
The beneficial effects of the utility model are as follows: the utility model relates to a pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation, which controls the opening of a valve port of a pilot valve by utilizing the change of the opening of a main valve when the flow is changed, so that the output pressure of a main valve of the pressure reducing valve positively fluctuates along with the output flow, and the risks of water leakage and pipe explosion of a pipeline are reduced; in addition, a great deal of resources and maintenance cost can be saved.
Drawings
FIG. 1 is a schematic diagram of a pressure reducing valve with output pressure positively fluctuating with output flow fluctuation;
FIG. 2 is a schematic diagram of a pressure reducing valve with output pressure in a forward direction along with output flow fluctuation, which relates to a pilot valve;
wherein, 1, a main valve of the pressure reducing valve, 2, a main valve core, 3, a valve rod, 4, a push rod, 5, a pilot valve, 6, an adjustable throttle valve, 7, an O-shaped sealing ring, 8, a boss, 9, a nut, 10, a lower valve body, 11, a sleeve, 12, a plunger, 13 and a first spring, 14, a second spring, 15, a retainer ring, 16, a gasket, 17, a stop valve, a spring head of the second spring, B, a long groove, a first interface of a pilot valve, B, a second interface of the pilot valve, G, a control cavity, V, a main valve port, V0 and a pilot valve port.
Detailed Description
Examples:
the embodiment provides a pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation, referring to fig. 1 and 2, the pressure reducing valve comprises a pressure reducing valve main valve 1, a pilot valve 5, an adjustable throttle valve 6 and a stop valve 17, a control cavity G is arranged at the upper part of the pressure reducing valve main valve 1, the pressure reducing valve main valve 1 is fixedly connected with the pilot valve 5, the inlet end of the pressure reducing valve main valve 1 is respectively connected with a first interface A of the control cavity G and the pilot valve 5 after passing through the adjustable throttle valve 6, and the outlet end of the pressure reducing valve main valve 1 is connected with a second interface B of the pilot valve 5 after passing through the stop valve 17 through the corresponding pipeline.
Referring to fig. 1 and 2, the main valve 1 of the pressure reducing valve further comprises a valve rod 3, a push rod 4 is arranged above the valve rod 3, an O-shaped sealing ring 7 is arranged on the outer diameter of the push rod 4, a gasket 16 is sleeved above the push rod 4, and a check ring 15 for positioning is arranged above the gasket 16. In this embodiment, the main valve 1 of the pressure reducing valve is mainly different from the 200X type pressure reducing valve in that a push rod 4 is provided above a valve rod 3, an O-ring 7 is provided on the outer diameter of the push rod 4, a gasket 16 is sleeved above the push rod 4, and the gasket is positioned by a retainer ring 15.
Referring to fig. 2, for the construction of the pilot valve, the pilot valve 5 includes a lower valve body 10 and a sleeve 11 disposed in a valve cavity of the lower valve body 10, an outer convex ring is disposed at the bottom of the sleeve 11, a long groove b is disposed at a position above the outer convex ring of the sleeve 11, and a through hole is formed at the top of the sleeve 11. A second spring 14 and a plunger 12 are arranged in the inner cavity of the sleeve 11, one end of the second spring 14 is in abutting connection with a gasket 16, and a spring head a of the second spring 14 is inserted into the long groove b; the plunger 12 is arranged above the inner cavity of the sleeve 11, the plunger 12 is movably connected with the inner cavity of the sleeve 11, the other end of the second spring 14 is screwed with a spiral groove on the surface of the plunger 12, and a plurality of spring rings of the second spring 14 are screwed in the spiral groove on the surface of the plunger 12. The sleeve 11 is characterized by further comprising a first spring 13 arranged above the outer convex ring of the sleeve 11, wherein the first spring 13 is sleeved on the outer surface of the sleeve 11, and the end face of the first spring 13 abuts against the outer convex ring of the sleeve 11.
Referring to fig. 2, a boss 8 is provided at the top end of the upper valve cover of the main valve 1 of the pressure reducing valve, the boss 8 is in threaded connection with the lower valve body 10 of the pilot valve 5, an internal thread is provided in the inner hole of the boss 8, and an external thread is provided at the bottom of the lower valve body 10 of the pilot valve 5. In this embodiment, after the boss 8 at the top end of the upper valve cover of the main valve 1 of the pressure reducing valve is screwed with the lower valve body 10, the vertical center line of the main valve 1 of the pressure reducing valve is identical to the vertical center line of the pilot valve 5.
Referring to fig. 2, the stiffness of the first spring 13 is greater than the stiffness of the second spring 14, and the wire diameter of the second spring 14 is adapted to the width of the long groove b. The plunger 12 is abutted with the top surface of the sleeve 11, and an inner hexagonal blind hole is formed in the top end of the plunger 12. In the present embodiment, the stiffness of the first spring 13 is greater than that of the second spring 14, so that the force acting on the first spring 13 is relatively small, resulting in a small variation in the valve opening V0 of the pilot valve. In addition, the plunger 12 abuts against the top surface of the sleeve 11, and rotating the plunger 12 can cause a portion of the number of turns of the second spring 14 to enter or exit the helical groove, thereby changing the effective number of turns of the second spring 14 to change the stiffness of the second spring 14.
In this embodiment, specifically, the inlet end of the main valve 1 of the pressure reducing valve is connected to the control chamber G thereof and the first port a of the pilot valve 5 through the adjustable throttle valve 6, respectively, and the outlet end of the main valve 1 of the pressure reducing valve is connected to the second port B of the pilot valve 5 through the stop valve 17.
In the embodiment, a small stepped shaft is arranged at the top of the push rod 4, a gasket 16 is sleeved on the small stepped shaft, and after the sleeve is completed, a check ring 15 is used for positioning; furthermore, the push rod 4 is provided with an O-ring 7.
In this embodiment, the sleeve 11 has a structure with an outer convex ring at the bottom, the outer convex ring supports the first spring 13, and the long groove b is disposed below the sleeve 11, so as to fix the spring head a of the second spring 14 and prevent the second spring 14 from rotating.
In this embodiment, the plunger 12 disposed in the sleeve 11 can rotate, and the pitch and depth of the bolt groove on the surface of the plunger 12 are respectively adapted to the pitch and the wire diameter of the second spring 14.
In this embodiment, the first spring 13 abuts against the outer collar of the sleeve 11, and the first spring 13 is disposed on the outer surface of the sleeve 11.
For the specific principles of the present utility model, detailed herein: when the flow passing through the main valve 1 of the pressure reducing valve is increased, the opening of the main valve port V tends to be increased by means of the kinetic energy of a medium, so that the main valve core 2 pushes the valve rod 3 and the push rod 4 to move upwards, a gasket 16 above the push rod 4 compresses a second spring 14 on the valve rod, the opening of the pilot valve port V0 is increased by applying force to a first spring 13 through an outer convex ring of the sleeve 11, the flow of the medium flowing out of the pilot valve 5 is increased, the pressure in the control cavity G is released, the pressure is reduced, the main valve core 2 is lifted under the action of pressure difference, the opening of the main valve port V is increased, and the output pressure P2 of the main valve 1 of the pressure reducing valve is lifted; conversely, when the flow rate through the pressure reducing valve main valve 1 decreases, the opening degree of the main valve port V decreases, and the output pressure P2 decreases, so that the output pressure P2 fluctuates in the forward direction with the output flow rate.
Further, the output pressure and the output flow rate of the pressure reducing valve of each specification are in one-to-one correspondence, and a small change in the opening degree of the pilot valve port V0 causes a large change in the output pressure P2. If the push rod 4 directly pushes the first spring 13, the change value of the opening of the valve port V0 of the pilot valve is necessarily consistent with the change value of the opening of the main valve port V, so that the output pressure P2 greatly fluctuates, and the output pressure P2 is not matched with the output flow; in order to match the two, the push rod 4 acts on the second spring 14 through the gasket 16 and then acts on the first spring 13 through the outer convex ring of the sleeve 11, and the opening change of the pilot valve port V0 is smaller because the rigidity of the second spring 14 is smaller than that of the first spring 13, so that the force acting on the first spring 13 is smaller.
To achieve a more accurate match, the stiffness of the second spring 14 can be adjusted to adjust the force acting on the first spring 13, rotating the plunger 12 to bring a portion of the number of turns of the second spring 14 into or out of the helical groove, and increasing or decreasing the effective number of turns of the second spring 14 to change the stiffness of the second spring 14.
Claims (7)
1. The utility model provides a relief pressure valve that output pressure is forward fluctuation along with output flow fluctuation, its characterized in that, including relief pressure valve main valve (1), relief pressure valve main valve (1) are equipped with the control chamber, relief pressure valve main valve (1) top fixedly connected with pilot valve (5), the entrance point of relief pressure valve main valve (1) is through first interface connection with control chamber and pilot valve (5) respectively behind adjustable throttle valve (6), the exit end of relief pressure valve main valve (1) is through the second interface connection of stop valve (17) with pilot valve (5).
2. The pressure reducing valve with the forward fluctuation of output pressure along with the fluctuation of output flow according to claim 1, wherein the pressure reducing valve main valve (1) further comprises a valve rod (3), a push rod (4) is arranged above the valve rod (3), an O-shaped sealing ring (7) is arranged on the outer diameter of the push rod (4), a gasket (16) is sleeved above the push rod (4), and a check ring (15) for positioning is arranged above the gasket (16).
3. The pressure reducing valve with the forward fluctuation of output pressure along with the fluctuation of output flow according to claim 1, wherein the pilot valve (5) comprises a lower valve body (10) and a sleeve (11) arranged in a valve cavity of the lower valve body (10), an outer convex ring is arranged at the bottom of the sleeve (11), a long groove is arranged at the position, above the outer convex ring, of the sleeve (11), and a through hole is formed in the top of the sleeve (11).
4. A pressure reducing valve with output pressure positively fluctuating with output flow fluctuation according to claim 3, characterized in that a second spring (14) and a plunger (12) are arranged in the inner cavity of the sleeve (11), one end of the second spring (14) is abutted with a gasket (16), and a spring head of the second spring (14) is inserted into a long groove; the plunger (12) is arranged above the inner cavity of the sleeve (11) and is in butt joint with the top surface of the sleeve (11), an inner hexagonal blind hole is formed in the top end of the plunger (12), the plunger (12) is movably connected with the inner cavity of the sleeve (11), and the other end of the second spring (14) is screwed with a spiral groove on the surface of the plunger (12).
5. A pressure reducing valve with output pressure positively fluctuating with output flow fluctuation according to claim 3 or 4, characterized by further comprising a first spring (13) arranged above the outer convex ring of the sleeve (11), the first spring (13) being sleeved on the outer surface of the sleeve (11), the end face of the first spring (13) being abutted against the outer convex ring of the sleeve (11).
6. A pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation according to claim 3, characterized in that the top end of the upper valve cover of the main valve (1) of the pressure reducing valve is provided with a boss (8), the boss (8) is in threaded connection with the lower valve body (10) of the pilot valve (5), an inner thread is arranged in the inner hole of the boss (8), and the lower valve body (10) of the pilot valve (5) is provided with an outer thread.
7. The pressure reducing valve with the output pressure positively fluctuating with the fluctuation of the output flow according to claim 5, characterized in that the rigidity of the first spring (13) is larger than that of the second spring (14), and the line diameter of the second spring (14) is matched with the width of the long groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223253208.3U CN219606157U (en) | 2022-12-06 | 2022-12-06 | Pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223253208.3U CN219606157U (en) | 2022-12-06 | 2022-12-06 | Pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219606157U true CN219606157U (en) | 2023-08-29 |
Family
ID=87752280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223253208.3U Active CN219606157U (en) | 2022-12-06 | 2022-12-06 | Pressure reducing valve with output pressure positively fluctuating along with output flow fluctuation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219606157U (en) |
-
2022
- 2022-12-06 CN CN202223253208.3U patent/CN219606157U/en active Active
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