Piping structure of pressure reducing valve
By introducing a one-way needle valve and a Y-type filter into the piping structure of the pressure reducing valve, the problems of large pressure fluctuations and cross-pressure within the valve cover are solved, achieving more stable pressure control and rapid response, and improving the service life and accuracy of the pressure reducing valve.
Patent Information
- Application Number
- CN202520713777.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-04-16
AI Technical Summary
The pressure fluctuations within the valve cover of existing pressure reducing valves are large, resulting in high operating frequency of the pilot valve, affecting its service life and working accuracy, slow dynamic pressure response speed, and short-term cross pressure between the valve and its upstream and downstream.
The design employs a one-way needle valve, with only one pressure tap on the valve cover. The one-way needle valve limits the fluid outflow velocity, and the Y-type filter facilitates impurity removal, thus optimizing the piping structure of the pressure reducing valve.
It improves the valve's static pressure stabilization capability and dynamic response speed, reduces short-term pressure surges before and after the valve, and enhances the dynamic pressure reduction performance and stability of the pressure reducing valve.
Smart Images
Figure CN223881799U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pressure reducing valve equipment technical field especially relates to a pressure reducing valve piping structure. BACKGROUND
[0002] In prior art, the pressure reducing valve generally has two pressure taps, one of which is used as a front pressure tap and connected with a needle valve, and the other is used as a rear pressure tap and connected with a pilot valve. When liquid flows through the pilot valve of the pressure reducing valve, the pressure drops to a set value. At this time, a dynamic balance is formed among the pressure of the liquid in the valve cover on the diaphragm (slightly lower than the pressure before the valve), the pressure of the liquid after the valve on the diaphragm (the pressure set by the pressure reducing pilot valve) and the pressure of the liquid before the valve on the valve disc, and the opening degree is determined by the flow.
[0003] This piping mode is prone to cause large pressure fluctuation in the valve cover because liquid flows in and out, which in turn leads to high operation frequency of the pilot valve, and the service life and working accuracy of the valve are greatly affected.
[0004] In addition, because there are two pressure taps, the dynamic response speed of the pressure reducing valve is slow, the dynamic fluctuation amplitude of the pressure after the valve is large, and the time is long.
[0005] In addition, after the pump is restarted after stopping in front of the valve, the problem of short-time pressure stringing before and after the valve is prone to occur. SUMMARY
[0006] The pressure reducing valve piping structure provided by the embodiments of the present application has only one pressure tap, the pressure in the valve cover is more stable, the static pressure stabilizing capacity of the valve can be effectively improved, and when the pressure before the valve fluctuates, the pressure rising speed in the valve cover is also obviously increased, so that the dynamic response speed of the valve can be improved, and the problem of short-time pressure stringing before and after the valve is not prone to occur.
[0007] The pressure reducing valve piping structure provided by the embodiments of the present application is used for a pressure reducing valve, wherein the pressure reducing valve is provided with a valve cover and a valve body, the valve body is provided with a front liquid hole and a rear liquid hole, the front liquid hole is connected with a three-way adapter valve through a first ball valve and a filter in sequence, the three-way adapter valve further has a second interface and a third interface, the three-way adapter valve is connected with a one-way needle valve through the second interface, the one-way needle valve is connected with a pressure tap of the valve cover through a second ball valve, the three-way adapter valve is connected with a pressure reducing pilot valve through the third interface, and the other end of the pressure reducing pilot valve is connected with the rear liquid hole through a third ball valve.
[0008] In a possible implementation manner, the filter is a Y-shaped filter, and the bottom of the filter is provided with a detachable filter cartridge.
[0009] In a possible implementation, the first ball valve is connected with a first socket joint, the first socket joint is connected with a second socket joint through a seamless steel pipe, and the other end of the second socket joint is connected with the inlet of the filter.
[0010] In a possible implementation, the pressure reducing guide valve is connected with the third ball valve through a third socket joint, and a seamless steel pipe is connected between the pressure reducing guide valve and the third socket joint.
[0011] In a possible implementation, the first socket joint, the second socket joint, and the third socket joint are all 90° socket joints.
[0012] Beneficial effects: compared with the prior art, the pressure reducing valve pipe structure provided in the application only sets one pressure tapping on the valve cover, breaks the conventional setting of two pressure tapings, and slows down the speed of liquid flowing out of the valve cover through the reverse flow limiting action of the one-way needle valve, that is, the speed at which the pressure in the valve cover becomes smaller, so as to slow down the running speed of the valve disc, effectively improve the dynamic pressure reducing performance of the pilot type pressure reducing valve, and especially when the rear end flow fluctuates, the pressure after the valve can still be kept stable, in addition, since only the pressure out of the valve cover is limited, and the pressure into the valve cover is not limited, the problem of short-time pressure connection before and after the valve is not prone to occur.
[0013] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 The structure of the pressure reducing valve pipe structure of the application is shown. DETAILED DESCRIPTION
[0015] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only used as examples, and other obvious modifications can be thought by those skilled in the art. The basic principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.
[0016] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the above terms cannot be understood as a limitation on the present application.
[0017] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.
[0018] Reference Figure 1 The embodiment of the present application provides a pressure reducing valve pipe structure for a pressure reducing valve 10, wherein the pressure reducing valve 10 is provided with a valve cover 11 and a valve body 12, wherein the valve body 12 is provided with a valve front liquid hole and a valve rear liquid hole, and the valve front liquid hole is connected with a three-way switching valve 23 through a first ball valve 21 and a filter 22 in sequence, wherein the three-way switching valve 23 is also provided with a second interface and a third interface, wherein the three-way switching valve 23 is connected with a one-way needle valve 24 through the second interface, and the one-way needle valve 24 is connected with a pressure tapping (i.e. a pressure inlet and outlet) of the valve cover 11 through a second ball valve 25, wherein the three-way switching valve 23 is connected with a pressure reducing pilot valve 26 through the third interface, and the other end of the pressure reducing pilot valve 26 is connected with the valve rear liquid hole through a third ball valve 27.
[0019] In a conventional pilot pressure reducing valve pipe structure, the valve cover has two pressure taps, one in and one out, one connected with a needle valve in front of the valve, and the other connected with a pilot valve behind the valve. When liquid flows through the pressure reducing pilot valve, the pressure is reduced to a set value, and a dynamic balance is formed among the pressure of the liquid in the valve cover on the diaphragm, the pressure of the liquid behind the valve on the diaphragm, and the pressure of the valve front on the valve flap. Because the pilot pressure reducing valve is a dynamic control valve, it is a wavy line type pressure reduction along the set value, and it is very sensitive to pressure conversion. The pressure fluctuation in the valve cover chamber is large, and because the valve cover pressure affects the operation of the valve flap, and the operation of the valve flap has a certain inertia, it cannot limit the up and down operation of the valve flap, so that the amplitude of the up and down operation of the valve flap is large, and the frequency is high, which directly leads to the increase of the fluctuation of the pressure behind the valve.
[0020] After optimization, the pressure reducing valve pipe structure provided by the present application can play a one-way limiting flow role through the one-way needle valve 24, that is, the liquid flowing from the valve front liquid hole can normally flow to the valve cover 11 through the one-way needle valve 24, and the liquid in the valve cover 11 will be limited when flowing back, that is, the one-way needle valve 24 will slow down the outflow speed of the liquid in the valve cover 11, that is, reduce the speed of the pressure reduction in the valve cover 11, and thus can slow down the speed of the valve flap operation, so as to effectively improve the dynamic pressure reducing performance of the pilot pressure reducing valve, especially when the flow fluctuates at the rear end (behind the valve), the pressure behind the valve can still be kept stable, and when the pressure fluctuates in front of the valve, the pressure rising speed in the valve cover will increase obviously, thereby the dynamic response speed of the valve can be improved.
[0021] When the pump before the pressure reducing valve is maintained or restarted after an accident, the pressure in the valve cover is slower than the pressure before the valve, and the overall valve will be opened, which is very easy to cause the problem of short-time same pressure before and after the valve, which may damage the rear-end equipment and pipeline, and the optimized piping mode limits the pressure out of the valve cover 11 based on the action of the one-way needle valve 24, and does not limit the pressure into the valve cover 11, so the problem of pressure before and after the valve does not occur.
[0022] In one embodiment, the filter 22 is a Y-type filter, and the bottom of the filter 22 is provided with a detachable filter cartridge 221. When impurities are blocked by the filter screen in the filter 22, the impurities can be quickly cleaned by removing the filter cartridge 221, and then reinstalling it, which is convenient to use.
[0023] In one embodiment, the first ball valve 21 is connected with a first socket joint 211, wherein the first socket joint 211 is connected with a second socket joint 213 through a seamless steel pipe 212, and the other end of the second socket joint 213 is connected with the inlet of the filter 22.
[0024] In one embodiment, the pressure reducing pilot valve 26 is connected with the third ball valve 27 through a third socket joint 261, and a seamless steel pipe 262 is connected between the pressure reducing pilot valve 26 and the third socket joint 261.
[0025] In one embodiment, the first socket joint 211, the second socket joint 213 and the third socket joint 261 are all 90° socket joints.
[0026] It should be noted that the terms "first", "second" and "third" in the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance, and these terms can be interpreted as names.
[0027] It should be understood by those skilled in the art that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The advantages of the utility model have been fully and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be any deformation or modification without departing from the principle.
Claims
1. A pressure reducing valve piping structure for a pressure reducing valve, wherein the pressure reducing valve is provided with a valve cover and a valve body, the valve body being provided with a liquid hole before the valve and a liquid hole after the valve, characterized in that, The valve front liquid hole is connected with a three-way switching valve in sequence through a first ball valve and a filter, wherein the three-way switching valve is further provided with a second interface and a third interface, the three-way switching valve is connected with a one-way needle valve through the second interface, the one-way needle valve is connected with a pressure tapping of the valve cover through a second ball valve, the three-way switching valve is connected with a pressure reducing pilot valve through the third interface, and the other end of the pressure reducing pilot valve is connected with the valve rear liquid hole through a third ball valve.
2. The pressure reducing valve piping structure according to claim 1, wherein The filter is a Y-type filter, and a detachable filter cartridge is arranged at the bottom of the filter.
3. The pressure reducing valve piping structure according to claim 2, wherein The first ball valve is connected with a first sleeve joint, the first sleeve joint is connected with a second sleeve joint through a seamless steel pipe, and the other end of the second sleeve joint is connected with the inlet of the filter.
4. The pressure reducing valve piping structure according to claim 3, wherein The pressure reducing pilot valve is connected with the third ball valve through a third sleeve joint, and a seamless steel pipe is arranged between the pressure reducing pilot valve and the third sleeve joint.
5. The pressure reducing valve piping structure according to claim 4, wherein The first sleeve joint, the second sleeve joint and the third sleeve joint are all 90° sleeve joints.