Diaphragm type mute pressure reducing valve

Abstract

The utility model provides a diaphragm type silent pressure reducing valve, and relates to the technical field of pressure reducing valves, the diaphragm type silent pressure reducing valve comprises a pressure valve shell, a valve core sleeve and a valve rod, a plurality of water outlet holes are machined in the valve core sleeve, the valve rod comprises a valve core rod, a fixed rod head is machined at one end of the valve core rod, and a guide boss and a turbulence preventing structure are connected to the outer portion of the valve core rod in a sleeving mode; an assembly rod head is arranged at the other end of the valve element rod, the bottom surface of the guide boss is machined into an arc face, and a positioning sleeve is machined on the top surface of the guide boss. A filling sleeve piece is connected to the exterior of the positioning sleeve in a sleeving mode, the turbulence prevention structure comprises a limiting sleeve, and a plurality of speed reduction strips are machined on the outer wall of the limiting sleeve; according to the technical scheme, the guide boss and the valve element rod are designed to be detachable, in the process that the valve rod is installed in the valve element sleeve, the guide boss can be arranged in the valve element sleeve firstly, then the valve element rod penetrates through the top of the valve element sleeve and is connected with the guide boss, efficient assembling work is facilitated, and limitation is small.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a diaphragm type silent pressure reducing valve. Background Art

[0002] The pressure reducing valve reduces the inlet pressure to a certain required outlet pressure by adjusting the inlet pressure, and automatically keeps the outlet pressure stable by relying on the energy of the medium itself. From the perspective of fluid mechanics, the pressure reducing valve is a throttling element with variable local resistance, that is, by changing the throttling area, the flow velocity and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of reducing pressure. Pressure reducing valves are widely used in high-rise buildings, areas with excessively high water pressure in urban water supply networks, mines and other occasions to ensure that each water point in the water supply system obtains appropriate service water pressure and flow. Given that the water loss rate and waste degree are almost proportional to the water pressure of the water supply system, the pressure reducing valve has the effect of improving the operating conditions of the system and potentially saving water.

[0003] The patent document with publication number CN104534134B discloses a high-precision diaphragm silent pressure reducing valve. The water flow hole of the valve core sleeve is provided with a serrated anti-turbulence structure, and a boss 2 is provided on the circumference of the outer wall of the valve core. As a preferred configuration, the cross-section of boss 2 is a circular arc surface. The circular arc surface can be further preferably a semicircular arc surface. When the medium passes through, the flow velocity is reduced, the fluid flows in layers without mixing, the medium laminar flow will not be destroyed, and the energy loss is small, thereby ensuring the stability of the medium flow and improving the pressure regulation accuracy of the pressure reducing valve. At the same time, the anti-turbulence structural design avoids the occurrence of turbulence and the generation of corresponding noise.

[0004] However, in the process of implementing the above technical solution, it is found that the above technical solution has the following technical problems:

[0005] The existing high-precision diaphragm silent pressure reducing valve processes a boss on the outside of the valve core and a serrated anti-turbulence structure on the valve core sleeve to reduce the flow velocity of the medium during flow, thereby reducing the noise generated during the turbulence of the medium. However, in the actual production process, the boss on the outside of the valve core is fixed and easily affected by the internal structure of the valve core sleeve, making it difficult to install. Utility Model Content

[0006] In order to overcome the shortcomings of the existing high-precision diaphragm silent pressure reducing valve in the actual production process, the boss on the outside of the valve core is fixedly set, which is easily affected by the internal structure of the valve core sleeve, resulting in it being difficult to install, and the anti-turbulence structure is processed inside the valve core sleeve, which makes the processing difficult, an embodiment of the present application provides a diaphragm silent pressure reducing valve, by designing the guide boss and the valve core rod to be detachable, in the process of installing the valve stem into the interior of the valve core sleeve, the guide boss can be placed inside the valve core sleeve first, and then the valve core rod can be passed through the top of the valve core sleeve to connect with the guide boss, which is conducive to efficient assembly work when the internal structure of the valve core sleeve is complex.

[0007] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0008] A diaphragm type silent pressure reducing valve comprises a pressure reducing valve housing, a valve core sleeve and a valve stem, wherein the valve core sleeve is assembled and connected inside the pressure reducing valve housing;

[0009] The valve stem is arranged on the inner side of the pressure reducing valve housing;

[0010] Among them, the interior of the valve core sleeve is processed with multiple water outlet holes, the valve stem includes a valve core rod, one end of the valve core rod is processed with a fixed rod head, the outside of the valve core rod is sleeve-connected with a guide boss and an anti-turbulence structure, and the other end of the valve core rod is provided with an assembly rod head, and the assembly rod head is assembled and fixed to the valve core rod by bolts.

[0011] In a possible implementation, the bottom surface of the guide boss is processed into an arc surface, and the top surface of the guide boss is processed with a positioning sleeve, the positioning sleeve is sleeved on the outside of the valve core rod, and one end of the positioning sleeve is supported on the bottom of the fixed rod head, and the multiple water outlet holes are evenly spaced around the center of the valve core sleeve, and the guide boss is located at the center of the multiple water outlet holes.

[0012] In one possible implementation, the positioning sleeve is externally sleeve-connected with a filling kit, the outer diameter of the filling kit is the same as the bottom diameter of the fixed rod head, the top surface of the filling kit fits with the surface of the fixed rod head, and the bottom surface of the filling kit fits with the top surface of the guide boss.

[0013] In one possible implementation, the anti-turbulence structure includes a limit sleeve, and the outer wall of the limit sleeve is processed with a plurality of speed reduction strips, the cross-sections of the plurality of speed reduction strips are all triangular, and the hypotenuses away from the limit sleeve are processed into rounded corners, and the plurality of speed reduction strips are evenly spaced around the center of the limit sleeve.

[0014] In a possible implementation, the outer diameter of the limiting sleeve is the same as the bottom outer diameter of the guide boss, the top end surface of the limiting sleeve fits the bottom surface of the guide boss, and the bottom end surface of the limiting sleeve fits the top surface of the assembly rod head.

[0015] In one possible implementation, one side of the pressure reducing valve housing is assembled with a water inlet pipe head, the other side of the pressure reducing valve housing is assembled with a water outlet pipe head, the top of the center of the pressure reducing valve housing is assembled with a pressure regulator, the bottom of the center of the pressure reducing valve housing is assembled with a collector, a pressure gauge is provided between the water inlet pipe head and the pressure regulator, and the bottom of the pressure gauge is assembled and fixed to the pressure reducing valve housing.

[0016] In a possible implementation, a diaphragm is provided on the top of the valve core sleeve, the valve core rod passes through the inside of the diaphragm from the top to the bottom, and the fixed rod head is located on the top of the diaphragm and connected to one end of the pressure regulator.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects:

[0018] 1. By designing the guide boss and the valve core rod to be detachable, when installing the valve stem into the valve core sleeve, the guide boss can be placed inside the valve core sleeve first, and then the valve core rod can pass through the top of the valve core sleeve and connect with the guide boss, which is conducive to efficient assembly work when the internal structure of the valve core sleeve is complex;

[0019] 2. By arranging an anti-turbulence structure on the outside of the valve core rod, the anti-turbulence structure is supported between the guide boss and the assembly rod head, limiting the sliding of the guide boss on the outside of the valve core rod. When the medium flows from the outside to the inside of the bottom of the valve core sleeve, the contact surface between the limit sleeve and the medium can be increased through multiple speed reduction strips, thereby increasing the loss of internal energy of the flowing medium. In cooperation with the arc surface at the bottom of the guide boss, the medium can flow more easily to the inside of the water outlet, which is conducive to achieving a good noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a cross-sectional view of the housing of the pressure reducing valve of the utility model;

[0022] Figure 3 It is a cross-sectional view of the valve core sleeve of the utility model;

[0023] Figure 4 It is an exploded view of the valve stem of the utility model.

[0024] Description of the drawings: 1. Pressure gauge; 2. Water inlet pipe head; 3. Pressure regulator; 4. Water outlet pipe head; 5. Collector; 6. Pressure reducing valve housing; 7. Diaphragm; 8. Valve stem; 801. Fixed rod head; 802. Filling kit; 803. Anti-turbulence structure; 8031. Speed ​​​​reduction strip; 8032. Limit sleeve; 804. Assembly rod head; 805. Guide boss; 806. Valve core rod; 807. Positioning sleeve; 9. Valve core sleeve; 10. Water outlet hole. DETAILED DESCRIPTION

[0025] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0026] Embodiment 1:

[0027] This embodiment introduces a specific structure of a diaphragm type silent pressure reducing valve. Figure 1-Figure 4 As shown, it includes a pressure reducing valve housing 6, a valve core sleeve 9 assembled and connected inside the pressure reducing valve housing 6, and a valve stem 8 arranged on the inner side of the pressure reducing valve housing 6, one side of the pressure reducing valve housing 6 is assembled and connected with a water inlet pipe head 2, the other side of the pressure reducing valve housing 6 is assembled and connected with a water outlet pipe head 4, the top of the center of the pressure reducing valve housing 6 is assembled and connected with a pressure regulator 3, the bottom of the center of the pressure reducing valve housing 6 is assembled and connected with a collector 5, a pressure gauge 1 is arranged between the water inlet pipe head 2 and the pressure regulator 3, and the bottom of the pressure gauge 1 is assembled and fixed to the pressure reducing valve housing 6;

[0028] like Figures 2 to 4 As shown, the valve core sleeve 9 is internally processed with a plurality of water outlet holes 10, and the plurality of water outlet holes 10 are equally spaced around the center of the valve core sleeve 9. The valve stem 8 includes a valve core rod 806, one end of which is processed with a fixed rod head 801, the valve core rod 806 is externally sleeve-connected with a guide boss 805 and an anti-turbulence structure 803, and the other end of the valve core rod 806 is provided with an assembly rod head 804;

[0029] Among them, a diaphragm 7 is arranged at the top of the valve core sleeve 9. When the valve core rod 806 passes through the inside of the diaphragm 7 from the top to the bottom, the fixed rod head 801 is located at the top of the diaphragm 7 and connected to one end of the pressure regulator 3. The assembly rod head 804 is assembled at one end of the valve core rod 806 by bolts, and the valve stem 8 can be pulled toward the top with the help of the diaphragm 7, so that the surface of the assembly rod head 804 fits with the bottom opening of the valve core sleeve 9;

[0030] Secondly, in order to enable the guide boss 805 to guide the flow of the medium inside the valve core sleeve 9 and reduce the noise generated by the medium hitting the inner wall of the valve core sleeve 9, as shown in FIG. Figure 3As shown, the bottom surface of the guide boss 805 is processed into an arc surface, and the top surface of the guide boss 805 is processed with a positioning sleeve 807. By sleeve-connecting the positioning sleeve 807 to the outside of the valve core rod 806, one end of the positioning sleeve is supported on the bottom of the fixed rod head 801, and the guide boss 805 is located at the center of the plurality of water outlet holes 10. When the valve stem 8 moves from the top to the bottom inside the valve core sleeve 9, the assembly rod head 804 is disconnected from the valve core sleeve 9, and the medium flows from the outside of the bottom of the valve core sleeve 9 to the inside and is guided by the guide boss 805 to be discharged to the surroundings and flow to the inside of the water outlet hole 10;

[0031] Furthermore, in order to prevent the medium from passing over the surroundings of the guide boss 805, a turbulent flow is formed at the top of the guide boss 805, such as Figure 3 and Figure 4 As shown, the outer sleeve of the positioning sleeve 807 is connected to the filling kit 802 in a sleeve-type manner. By making the outer diameter of the filling kit 802 the same as the bottom diameter of the fixed rod head 801, after the top surface of the filling kit 802 fits with the surface of the fixed rod head 801, and the bottom surface of the filling kit 802 fits with the top surface of the guide boss 805, a smooth transition between the guide boss 805 and the fixed rod head 801 can be ensured, thereby guiding the medium to flow in a laminar state.

[0032] By adopting the above technical solution:

[0033] The above design is that the guide boss 805 is sleeved on the outside of the valve core rod 806, and the filling kit 802 is sleeved on the outside of the positioning sleeve 807 on the top of the guide boss 805, so that the filling kit 802 is filled between the fixed rod head 801 and the guide boss 805. When the medium flows from the outside of the bottom of the valve core sleeve 9 to the inside, and is guided by the guide boss 805 to be discharged to the surroundings and flows to the inside of the water outlet 10, it can avoid the medium from forming turbulence and maintain laminar flow, thereby reducing the noise of water flowing through the inside of the pressure reducing valve housing 6;

[0034] Because the guide boss 805 and the valve core rod 806 are of detachable design, when installing the valve stem 8 into the interior of the valve core sleeve 9, the guide boss 805 can be placed inside the valve core sleeve 9 first, and then the valve core rod 806 can be passed through the top of the valve core sleeve 9 and connected to the guide boss 805. This is beneficial for assembly work when the internal structure of the valve core sleeve 9 is complex.

[0035] Embodiment 2:

[0036] Based on Example 1, this example introduces the specific structure of the valve stem 8. The anti-turbulence structure 803 includes a limit sleeve 8032, and the outer wall of the limit sleeve 8032 is processed with a plurality of speed reduction strips 8031.

[0037] Among them, by setting the cross-sections of the plurality of speed reduction strips 8031 ​​to be triangular, and processing the beveled sides of the speed reduction strips 8031 ​​away from the limiting sleeve 8032 into rounded corners, when the medium flows from the outside to the inside of the bottom of the valve core sleeve 9, the plurality of speed reduction strips 8031 ​​equally spaced around the center of the limiting sleeve 8032 guide the medium, and the contact surface between the limiting sleeve 8032 and the medium is increased, thereby increasing the friction force, increasing the loss of the internal energy of the flowing medium, and reducing the flow rate of the medium, so that the medium can flow more easily to the inside of the water outlet 10;

[0038] Secondly, in order to avoid the formation of steps between the guide boss 805 and the limit sleeve 8032, which would cause turbulence in the process of medium flow, such as Figure 4 As shown, the outer diameter of the limit sleeve 8032 is the same as the bottom outer diameter of the guide boss 805. By making the top end face of the limit sleeve 8032 fit with the bottom surface of the guide boss 805, and the bottom end face of the limit sleeve 8032 fit with the top surface of the assembly rod head 804, the guide boss 805 can be restricted from sliding outside the valve core rod 806 and cooperate with the guide boss 805 to guide the medium.

[0039] By adopting the above technical solution:

[0040] The above-mentioned design sets an anti-turbulence structure 803 on the outside of the valve core rod 806, so that the anti-turbulence structure 803 is supported between the guide boss 805 and the assembly rod head 804, thereby limiting the sliding of the guide boss 805 on the outside of the valve core rod 806. When the medium flows from the outside to the inside of the bottom of the valve core sleeve 9, the contact surface between the limit sleeve 8032 and the medium can be increased through multiple speed reduction strips 8031, thereby increasing the friction between the medium and the valve core rod 806, increasing the loss of internal energy of the flowing medium, reducing the flow rate of the medium, and making it easier for the medium to flow to the inside of the water outlet 10, thereby reducing noise.

[0041] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A diaphragm type silent pressure reducing valve, characterized in that: include: Pressure reducing valve housing (6); A valve core sleeve (9) is assembled and connected inside the pressure reducing valve housing (6); A valve stem (8) disposed inside the pressure reducing valve housing (6); The valve core sleeve (9) is internally processed with a plurality of water outlet holes (10), the valve stem (8) comprises a valve core rod (806), one end of the valve core rod (806) is processed with a fixed rod head (801), the valve core rod (806) is externally sleeve-connected with a guide boss (805) and an anti-turbulence structure (803), the other end of the valve core rod (806) is provided with an assembly rod head (804), and the assembly rod head (804) is assembled and fixed to the valve core rod (806) by bolts.

2. A diaphragm type silent pressure reducing valve according to claim 1, characterized in that: The bottom surface of the guide boss (805) is processed into an arc surface, and the top surface of the guide boss (805) is processed with a positioning sleeve (807); The positioning sleeve (807) is sleeved on the outside of the valve core rod (806), and one end of the positioning sleeve is supported on the bottom of the fixed rod head (801). The plurality of water outlet holes (10) are evenly spaced around the center of the valve core sleeve (9), and the guide boss (805) is located at the center of the plurality of water outlet holes (10).

3. A diaphragm type silent pressure reducing valve according to claim 2, characterized in that: The outer portion of the positioning sleeve (807) is sleeve-connected with a filling sleeve (802), and the outer diameter of the filling sleeve (802) is the same as the bottom diameter of the fixed rod head (801); The top surface of the filling kit (802) fits with the surface of the fixed rod head (801), and the bottom surface of the filling kit (802) fits with the top surface of the guide boss (805).

4. A diaphragm type silent pressure reducing valve according to claim 1, characterized in that: The anti-turbulence structure (803) comprises a limiting sleeve (8032), the outer wall of the limiting sleeve (8032) is processed with a plurality of speed reduction strips (8031), the cross-sections of the plurality of speed reduction strips (8031) are all triangular, and the beveled edges away from the limiting sleeve (8032) are processed into rounded corners; Wherein, a plurality of the speed reduction strips (8031) are evenly spaced around the center of the limiting sleeve (8032).

5. A diaphragm type silent pressure reducing valve as claimed in claim 4, characterized in that: The outer diameter of the limiting sleeve (8032) is the same as the outer diameter of the bottom of the guide boss (805), the top end surface of the limiting sleeve (8032) fits with the bottom surface of the guide boss (805), and the bottom end surface of the limiting sleeve (8032) fits with the top surface of the assembly rod head (804).

6. A diaphragm type silent pressure reducing valve according to claim 1, characterized in that: One side of the pressure reducing valve housing (6) is assembled and connected to a water inlet pipe head (2), the other side of the pressure reducing valve housing (6) is assembled and connected to a water outlet pipe head (4), the top of the center of the pressure reducing valve housing (6) is assembled and connected to a pressure regulator (3), the bottom of the center of the pressure reducing valve housing (6) is assembled and connected to a collector (5), a pressure gauge (1) is provided between the water inlet pipe head (2) and the pressure regulator (3), and the bottom of the pressure gauge (1) is assembled and fixed to the pressure reducing valve housing (6).

7. A diaphragm type silent pressure reducing valve according to claim 6, characterized in that: A diaphragm (7) is arranged on the top of the valve core sleeve (9), the valve core rod (806) passes through the inside of the diaphragm (7) from the top to the bottom, and the fixed rod head (801) is located on the top of the diaphragm (7) and is connected to one end of the pressure regulator (3).

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