Pressure reducing valve with rated pressure
By introducing a limiting groove and a limiting head structure into the pressure reducing valve, the downward movement of the valve core is limited. Combined with the elastic seal and return spring design, the problems of filter screen deformation and poor gas flow caused by excessive downward movement of the valve core are solved, achieving stable pressure reduction effect and safety.
Patent Information
- Application Number
- CN202520662682.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-09
AI Technical Summary
In traditional pressure reducing valves, the valve core moves downwards without restriction under high pressure, which can cause the filter screen to deform or be damaged, affecting the pressure reduction effect. Furthermore, the return spring is tightly compressed, preventing gas from flowing and posing a safety hazard.
A pressure reducing valve with rated pressure is designed. The valve core's downward movement is limited by the limiting groove and the limiting head. Combined with the elastic sealing structure and the return spring design, the valve core is ensured to work normally under rated pressure, avoiding excessive compression of the filter screen, and maintaining gas flow during reset.
Effective control of the valve core's downward movement ensures stable pressure reduction, prevents filter screen deformation or damage, ensures safe gas flow, and improves equipment reliability.
Smart Images
Figure CN223953364U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a pressure reducing valve, in particular to a pressure reducing valve with rated pressure. BACKGROUND
[0002] The pressure reducing valve is used for reducing high-pressure gas into low-pressure gas and keeping the stability of gas pressure and flow, and is applied to beer machines, coke machines and other devices needing gas supply.
[0003] The pressure reducing valve mainly moves up and down to open and close the valve core inside, controls the discharge of gas, thereby controls the pressure inside the device, and the upper end of the valve core of the traditional pressure reducing valve does not have any limiting structure, therefore when the pressure inside the device is too high, the pressure will make the valve core move down, at this time the stroke of the valve core moving down is not limited, and under the condition of high pressure, the pressure acting on the valve core will extrude the filter screen arranged at the bottom of the pressure reducing valve valve body downward, causes the deformation of the filter screen, and seriously, the filter screen will even be poked by the valve core, influences the normal use of the pressure reducing valve, and under the condition of excessive movement of the valve core, the gas discharge flow is extremely large, and finally will influence the actual pressure reducing effect.
[0004] At the same time, in order to facilitate the automatic reset of the valve core after pressure reduction, a reset spring will be arranged between the valve core and the filter screen, if the valve core moves excessively, the reset spring will be tightly compressed, causes the gas to be unable to flow in and out of the reset spring, and the reset spring encloses most of the filter holes on the filter screen, once the reset spring is tightly compressed, the filter holes will not be ventilated, influences the exhaust flow, thereby influences the pressure reducing effect, and has certain safety hidden danger. SUMMARY
[0005] The utility model solves the prior art problems, provides a pressure reducing valve with rated pressure, it can effectively limit the stroke of the valve core moving down, guarantees the release of the pressure inside the device under the condition of maintaining the rated pressure value, guarantees the pressure reducing effect, simultaneously avoids the overcompression of the reset spring and the filter screen under the condition of the valve core moving down.
[0006] The utility model solves the above technical problems by the technical scheme that:
[0007] The utility model discloses a pressure reducing valve with rated pressure, including the valve body, the outer thread of being located the upper outer wall of valve body and being located the filter screen of valve body lower extreme, the valve body upper end surface center is equipped with a limit groove, the limit groove groove bottom center is equipped with an upper movable hole, the valve body lower surface center is equipped with an assembly hole, the assembly hole hole bottom center is equipped with a lower movable hole with the upper movable hole intercommunication, the valve body upper end outer wall is equipped with a plurality of pressure reducing holes with the upper movable hole intercommunication, the assembly hole lower end orifice is equipped with the filter screen that is matched with it in, the filter screen is equipped with a plurality of evenly distributed filter holes on, the assembly hole is equipped with an inner tube with the matching in, the inner tube has the valve core with the same axis in, the valve core lower extreme with filter screen between is equipped with a reset spring, the valve core outer wall with inner tube inner wall has a ventilation gap between, the valve core upper end surface center is equipped with a limit rod, the limit rod upper end passes through lower movable hole, upper movable hole and is equipped with a limit head upwards in turn, the limit head lower surface with limit groove groove bottom between has a lower displacement interval, the inner tube upper end one with limit rod matched elastic sealing structure.
[0008] The limit head lower surface center is equipped with a screw seat, the screw seat lower end surface center is equipped with a screw hole, and the limit rod upper end is screwed in the screw hole, the interval between the screw seat lower end surface and the upper movable hole hole bottom is greater than the lower displacement interval, and the screw seat outer wall and the upper movable hole inner wall have an auxiliary gap between.
[0009] The elastic sealing structure includes a clamping groove on the inner tube upper end pipe orifice inner wall, and the clamping groove is annular, a elastic diaphragm is arranged in the clamping groove, and the elastic diaphragm is located between the assembly hole hole bottom and the lower side groove wall of the clamping groove, a sealing hole is arranged in the center of the elastic diaphragm, a sealing cone surface that is narrow at the top and wide at the bottom is arranged on the upper end outer wall of the valve core, and the sealing cone surface is attached to the inner edge of the sealing hole hole bottom.
[0010] An annular elastic force enhancing groove is arranged on the upper surface of the elastic diaphragm, and the groove width of the elastic force enhancing groove gradually decreases from top to bottom.
[0011] An annular lower pressing step is arranged on the outer wall of the middle part of the valve core.
[0012] A spring hole is arranged in the center of the lower end surface of the valve core, and the reset spring is located between the spring hole hole bottom and the upper surface of the filter screen, and the inner tube lower end surface and the upper surface of the filter screen have an air inlet gap between.
[0013] The depth of the spring hole is greater than one half of the original length of the reset spring, and the interval between the lower end surface of the valve core and the upper surface of the filter screen is greater than the lower displacement interval.
[0014] The valve body lower end is stamped to form an annular limit flange, and the upper surface of the limit flange is attached to the outer edge of the lower surface of the filter screen.
[0015] The outer wall of the upper end of the valve body is provided with a rotating head above the pressure reducing hole; the outer wall of the rotating head is provided with a plurality of anti-skid grooves uniformly distributed in a circle.
[0016] The utility model has the advantages of:
[0017] Compared with the prior art, when the equipment pressure is too large, the valve core of the pressure reducing valve with rated pressure adopting the utility model structure will move downward to open the sealing hole, thereby completing the pressure reducing work by using the pressure reducing hole; when the valve core moves downward, the limiting head will move downward synchronously; with the downward movement of the limiting head, the downward movement distance gradually decreases; when the downward movement distance is zero, the limiting groove bottom will limit the limiting head from moving downward continuously, thereby limiting the valve core from moving downward continuously, effectively controlling the stroke of the valve core moving downward, enabling the pressure reducing hole to maintain the rated pressure value when releasing gas for pressure reduction, and ensuring stable pressure reduction effect; at the same time, with the stroke of the valve core moving downward being limited, the situation that the filter screen is deformed or damaged due to excessive extrusion of the valve core can be effectively avoided. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a sectional view of the pressure reducing valve with rated pressure of the utility model;
[0019] Figure 2 is a structural schematic view of the pressure reducing valve with rated pressure of the utility model. DETAILED DESCRIPTION
[0020] The application will be further described in detail in combination with the drawings and specific embodiments:
[0021] Please refer to Figure 1 , Figure 2The utility model provides a pressure reducing valve with rated pressure, including valve body 1, the outer thread 2 of being located valve body 1 upper portion outer wall and the filter screen 3 of being located valve body 1 lower end, valve body 1 upper end face center is equipped with a limit groove 4, limit groove 4 groove bottom center is equipped with an upper movable hole 5, valve body 1 lower surface center is equipped with an assembly hole 6, assembly hole 6 hole bottom center is equipped with a lower movable hole 7 with upper movable hole 5 intercommunication, valve body 1 upper end outer wall is equipped with a plurality of pressure reducing hole 8 with upper movable hole 5 intercommunication, the filter screen 3 that is matched with is equipped in assembly hole 6 lower end orifice, the filter screen 3 is equipped with a plurality of evenly distributed filter hole 9 on, the inner tube 10 that is matched with is equipped in assembly hole 6, the inner tube 10 has the valve core 11 with its same axle in, the reset spring 12 is equipped between valve core 11 lower end and filter screen 3, valve core 11 outer wall and inner tube 10 inner wall have a ventilation gap 13 between, valve core 11 upper end face center is equipped with a limit rod 14, limit rod 14 upper end passes through lower movable hole 7, upper movable hole 5 in proper order and is equipped with a limit head 15, limit head 15 lower surface and limit groove 4 groove bottom have a lower displacement interval 16 between, the elastic sealing structure that is matched with is equipped on inner tube 10 upper end.
[0022] Limit head 15 lower surface center is equipped with a screw seat 17, screw seat 17 lower end face center is equipped with a threaded hole 18, and limit rod 14 upper end is screwed in threaded hole 18, and the interval between screw seat 17 lower end face and upper movable hole 5 hole bottom is greater than lower displacement interval 16, and screw seat 17 outer wall and upper movable hole 5 inner wall have auxiliary gap 19 between.
[0023] The elastic sealing structure includes a clamping groove 20 provided on the inner wall of the upper end of the inner tube 10, and the clamping groove 20 is annular; the clamping groove 20 is provided with an elastic diaphragm 21, and the elastic diaphragm 21 is located between the hole bottom of the assembly hole 6 and the lower side groove wall of the clamping groove 20; the center of the elastic diaphragm 21 is provided with a sealing hole 22; the upper end outer wall of the valve core 11 is provided with a sealing cone surface 23 which is narrow at the top and wide at the bottom, and the sealing cone surface 23 is in close contact with the inner edge of the hole bottom of the sealing hole 22.
[0024] The upper surface of the elastic diaphragm 21 is provided with an annular elastic force enhancing groove 24, and the groove width of the elastic force enhancing groove 24 gradually decreases from top to bottom.
[0025] The outer wall of the middle part of the valve core 11 is provided with an annular downward pressing step 25.
[0026] The center of the lower end surface of the valve core 11 is provided with a spring hole 26, and the reset spring 12 is located between the hole bottom of the spring hole 26 and the upper surface of the filter screen 3; the lower end surface of the inner tube 10 and the upper surface of the filter screen 3 have an air inlet gap 27 therebetween.
[0027] The spring hole 26 is deeper than one half of the original length of the return spring 12; the distance between the lower end surface of the valve core 11 and the upper surface of the filter screen 3 is greater than the downward distance 16.
[0028] The valve body 1 is formed with a limiting flange 28 at the lower end, which is annular; the upper surface of the limiting flange 28 is in contact with the outer edge of the lower surface of the filter screen 3.
[0029] The upper end of the valve body 1 is provided with a rotating head 29 above the pressure relief hole 8; the outer wall of the rotating head 29 is provided with a plurality of anti-skid grooves 30 distributed uniformly in a circle.
[0030] The use method of the utility model is as follows:
[0031] The valve body 1 can be screwed and fixed on the equipment through the external thread 2 on the outer wall of the valve body 1; when the internal air pressure of the equipment is too high, the gas will flow into the filter hole 9 through the lower end hole of the filter hole 9, and then flow out from the upper end hole of the filter hole 9; when the gas flows through the filter hole 9, the filter hole 9 can retain the impurities in the gas below the filter screen 3 through the hole diameter, thereby achieving the filtering effect; the filtered gas will be divided into two parts, one part flows into the air inlet gap between the lower end surface of the inner tube 10 and the upper surface of the filter screen 3, and the other part enters the return spring 12 and flows out to the outside of the return spring 12 through the gap of the return spring 12; finally, the two parts of gas flow into the air gap 13 between the inner wall of the inner tube 10 and the outer wall of the valve core 11 through the lower end tube of the inner tube 10, and then flow below the elastic diaphragm 21; at this time, the lower end hole of the sealing hole 22 in the center of the elastic diaphragm 21 is blocked by the sealing cone surface 23; at this time, the gas pressure pushes down the sealing cone surface 23, and at the same time, the downward step 25 is also pushed down; the existence of the downward step 25 can effectively increase the pressure area of the gas, thereby facilitating the downward movement of the valve core 11; when the valve core 11 moves downward, the lower end hole of the sealing hole 22 is opened, and the gas will enter the pressure relief hole 8 through the sealing hole 22, the lower movable hole 7 and the upper movable hole 5 in turn, and finally be discharged to the outside through the pressure relief hole 8, thereby achieving the pressure relief effect; when the pressure returns to normal, the return spring 12 pressed by the valve core 11 will move upward to reset through the elastic force generated by itself, thereby blocking and sealing the sealing hole 22 again.
[0032] When the valve core 11 moves downward, the limiting rod 14 drives the limiting head 15 to move downward synchronously, and after the limiting head 15 moves downward by a certain stroke, the lower surface of the limiting head 15 is attached to the groove bottom of the limiting groove 4, at this time, the groove bottom of the limiting groove 4 can effectively limit the limiting head 15 from continuing to move downward, thereby limiting the valve core 11 from continuing to move downward, effectively controlling the stroke of the valve core 11 moving downward, and the depth of the spring hole 26 is greater than one-half of the original length of the return spring 12, the spacing between the lower end surface of the valve core 11 and the upper surface of the filter screen 3 is greater than the downward moving spacing 16, so that the limitation of the stroke of the valve core 11 moving downward can avoid the situation that the return spring 12 is tightly compressed and the inside and outside of the return spring 12 cannot be ventilated, and the depth of the spring hole 26 can ensure the stability of the return spring 12 when being compressed.
[0033] As can be seen from the above, when the equipment pressure is too large, the valve core 11 will move downward to open the sealing hole 22, thereby completing the pressure reduction work by the pressure relief hole 8, when the valve core 11 moves downward, the limiting head 15 will move downward synchronously, with the limiting head 15 moving downward, the downward moving spacing 16 gradually decreases, when the downward moving spacing is zero, the limiting groove 4 groove bottom will limit the limiting head 15 from continuing to move downward, thereby limiting the valve core 11 from continuing to move downward, effectively controlling the stroke of the valve core 11 moving downward, so that the pressure relief hole 8 can maintain the rated pressure value when releasing gas for pressure reduction, ensuring stable pressure reduction effect, at the same time, with the stroke of the valve core 11 moving downward being limited, the situation that the valve core 11 excessively extrudes the filter screen 3 to cause the deformation or damage of the filter screen 3 can be effectively avoided.
[0034] A threaded seat 17 is arranged at the center of the lower surface of the limiting head 15, a threaded hole 18 is arranged at the center of the lower end surface of the threaded seat 17, and the upper end of the limiting rod 14 is screwed into the threaded hole 18, so that the limiting head 15 and the limiting rod 14 can be easily disassembled and assembled, thereby facilitating the replacement of the limiting head 15, and the stroke of the valve core 11 moving downward can be adjusted by changing the thickness of the limiting head 15.
[0035] The spacing between the lower end surface of the threaded seat 17 and the hole bottom of the upper movable hole 5 is greater than the downward moving spacing 16, and the auxiliary gap 19 is arranged between the outer wall of the threaded seat 17 and the inner wall of the upper movable hole, so that the threaded seat 17 cannot be attached to the hole bottom of the upper movable hole 5, thereby avoiding the situation that the gas cannot be discharged from the pressure relief hole 8.
[0036] An elastic diaphragm 21 is arranged on the upper surface of the filter screen 3, and an annular elastic enhancement groove 24 is arranged on the upper surface of the elastic diaphragm 21, the groove width of the elastic enhancement groove 24 gradually decreases from top to bottom, the existence of the elastic diaphragm 21 can play a buffering effect when the valve core 11 moves upward, thereby avoiding the situation that the sealing cone surface 23 is long-term collided with the inner edge of the lower end hole of the sealing hole 22 to cause abrasion, and the existence of the elastic enhancement groove 24 can effectively improve the deformation degree of the elastic diaphragm 21, thereby improving the buffering effect of the elastic diaphragm 21.
[0037] The lower end of the valve body 1 is stamped to form a limiting flange 28 in the shape of a ring. The upper surface of the limiting flange 28 is in contact with the outer edge of the lower surface of the filter screen 3. The limiting flange 28 can effectively limit the downward movement of the filter screen 3, ensuring the stability of the filter screen 3. When the limiting flange 28 is stamped, the lower end of the valve body 1 can be narrowed. Thus, the inner tube 10 can be firmly fixed in the assembly hole 6 by narrowing the lower end of the assembly hole 6. At the same time, the inner tube 10 can also be fixed in the assembly hole 6 by interference fit. Of course, other fixing methods can also be used.
[0038] The upper end of the valve body 1 is provided with a rotating head 29 above the pressure relief hole 8. The outer wall of the rotating head 29 is provided with a plurality of anti-skid grooves 30 uniformly distributed in a circle. The presence of the anti-skid grooves 30 can effectively increase the friction between the hand and the rotating head 29, making it easier to apply force to the rotating head 29 and to rotate the valve body 1 through the rotating head 29. This facilitates the installation and fixation of the valve body 1.
[0039] In actual operation, the thickness of the filter screen 3 can be increased to effectively improve the strength of the filter screen 3, further preventing the filter screen 3 from being deformed or damaged by the valve core 11.
Claims
1. A pressure reducing valve with a rated pressure, comprising a valve body, an external thread provided on an outer wall of an upper portion of the valve body, and a filter screen provided in an inner portion of a lower end of the valve body, characterized in that: The upper end face of the valve body is provided with a limiting groove in the center; the bottom of the limiting groove is provided with an upper movable hole in the center; the lower surface of the valve body is provided with an assembly hole in the center; the bottom of the assembly hole is provided with a lower movable hole which is in communication with the upper movable hole; the outer wall of the upper end of the valve body is provided with a plurality of pressure reduction holes which are in communication with the upper movable hole; the lower end of the assembly hole is provided with a filter screen which is matched with the assembly hole; the filter screen is provided with a plurality of evenly distributed filter holes; the assembly hole is provided with an inner tube which is matched with the assembly hole; the inner tube is provided with a valve core which is coaxial with the inner tube; a return spring is arranged between the lower end of the valve core and the filter screen; the outer wall of the valve core and the inner wall of the inner tube have an air gap; the upper end face of the valve core is provided with a limiting rod in the center; the upper end of the limiting rod passes through the lower movable hole and the upper movable hole in sequence and is provided with a limiting head; the lower surface of the limiting head and the bottom of the limiting groove have a downward movement interval; the upper end of the inner tube is provided with an elastic sealing structure which is matched with the limiting rod.
2. The pressure reducing valve having a rated pressure according to claim 1, characterized in that: The lower surface of the limiting head is provided with a threaded seat in the center; the lower end face of the threaded seat is provided with a threaded hole in the center, and the upper end of the limiting rod is screwed into the threaded hole; the interval between the lower end face of the threaded seat and the bottom of the upper movable hole is greater than the downward movement interval; the threaded seat has an auxiliary gap between the outer wall and the inner wall of the upper movable hole.
3. The pressure reducing valve with a rated pressure according to claim 1, characterized in that: The elastic sealing structure includes a clamping groove arranged on the inner wall of the upper end of the inner tube, and the clamping groove is annular; the clamping groove is provided with an elastic diaphragm, and the elastic diaphragm is located between the bottom of the assembly hole and the lower side wall of the clamping groove; the center of the elastic diaphragm is provided with a sealing hole; the outer wall of the upper end of the valve core is provided with a sealing cone surface which is narrow at the top and wide at the bottom, and the sealing cone surface is in close contact with the inner edge of the bottom of the sealing hole.
4. The pressure reducing valve having a rated pressure according to claim 3, characterized in that: The upper surface of the elastic diaphragm is provided with an annular elastic force enhancing groove, and the groove width of the elastic force enhancing groove gradually decreases from top to bottom.
5. The pressure reducing valve having a pressure rating according to claim 3, wherein: The outer wall of the middle part of the valve core is provided with an annular downward pressing step.
6. The pressure reducing valve having a pressure rating according to claim 1, wherein: The center of the lower end face of the valve core is provided with a spring hole, and the return spring is located between the bottom of the spring hole and the upper surface of the filter screen; the inner tube has an air inlet gap between the lower end face and the upper surface of the filter screen.
7. A pressure reducing valve having a pressure rating according to claim 6, characterized in that: The depth of the spring hole is greater than one half of the original length of the return spring; the interval between the lower end face of the valve core and the upper surface of the filter screen is greater than the downward movement interval.
8. The pressure reducing valve having a pressure rating according to claim 1, wherein: The lower end of the valve body is stamped to form a limiting flange which is annular; the upper surface of the limiting flange is in close contact with the outer edge of the lower surface of the filter screen.
9. The pressure reducing valve having a pressure rating according to claim 1, wherein: The outer wall of the valve body is provided with a rotating head above the pressure reduction hole; the outer wall of the rotating head is provided with a plurality of circumferentially evenly distributed anti-skid grooves.