Safety valve of boiler
By using the tangential contact between the sealing ring and the rounded transition surface, along with the cooperation of the spring, the problem of poor sealing in traditional safety valves is solved, achieving higher sealing performance and energy efficiency.
Patent Information
- Application Number
- CN202520271857.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-02-18
AI Technical Summary
In traditional safety valves, the sealing effect between the valve disc and the valve seat is poor due to the bending of the sealing gasket, resulting in air leakage, which affects energy utilization efficiency and increases production costs.
The sealing ring's mating curved surface makes tangential contact with the valve seat's rounded transition surface, and the spring's elasticity continuously presses the valve disc downwards, ensuring uniform contact between the sealing ring and the sealing seat. This gradually transforms the contact from line contact to surface contact, increasing frictional resistance and improving sealing performance.
It improves the fit between the sealing ring and the sealing seat, prevents gaps, enhances sealing performance, and reduces energy waste and production costs.
Smart Images
Figure CN223677095U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pipeline valve technical field, especially a boiler safety valve. BACKGROUND
[0002] Safety valve is also called cut-off valve, and belongs to forced sealing type valve, when the valve is closed, pressure must be applied to the valve clack to force the sealing surface not to leak, the combination surface of the valve clack and the valve seat of the traditional safety valve is two planes, and the sealing gasket is installed on the plane of the valve clack, but the traditional flat gasket sealing gasket will be bent after long time use, so that complete plane lamination cannot be realized, air leakage occurs, the valve clack of the safety valve leaks, so that the substances in the valve body leak out when not needed, energy is wasted, the energy utilization efficiency of the system is reduced, and energy consumption and production cost are increased. SUMMARY
[0003] The utility model wants to reach the purpose is to provide a kind of boiler safety valve, solve the problem that traditional valve clack and valve seat cannot be completely plane laminated, so that sealing effect is not good.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: a kind of boiler safety valve, including valve body, valve seat and valve clack, the valve seat is fixed in the valve body, the valve clack is connected with the valve body by spring, and sealing surface is formed with the valve seat, the valve clack is provided with the convex ring extending downward, the convex ring is provided with sealing ring, the upper end of the valve seat is provided with sealing seat, the inner side wall between the top end face of the sealing seat is provided with round corner transition surface, the outer surface of sealing ring is provided with matching curve surface, when the valve clack and the valve seat abut, the matching curve surface and the round corner transition surface abut.
[0005] Further, the matching curve surface of the sealing ring is circular.
[0006] Further, the opening direction of the round corner transition surface is towards the inner side of valve seat, and the top end face of the opening of the round corner transition surface is parallel with the inner side wall of the valve seat.
[0007] Further, the radius of the sealing ring is r, the radius of the sealing ring is R, r=Rx3 / 1.
[0008] Further, the sealing seat is screw connected with the valve seat, the sealing seat has clamping groove, and the clamping groove is clamped in the upper end of the valve seat.
[0009] Further, the upper end outer surface of the valve seat has external thread, and the side of the sealing seat with the clamping groove has internal thread matched with the external thread.
[0010] Further, a guide base is arranged between the valve body and the valve disc.
[0011] Further, an annular groove is arranged on the outer periphery of the convex ring for positioning the sealing ring.
[0012] Further, the sealing ring is embedded in the annular groove and a part of the surface is attached to the inner wall of the annular groove.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] The matching curved surface of the sealing ring is tangent to the fillet transition surface, and the contact is started in a linear contact mode, so that the uniformity of the contact between the matching curved surface and the fillet transition surface is better, which is beneficial to improving the fit of the matching curved surface with the fillet transition surface in the subsequent deformation process. BRIEF DESCRIPTION OF DRAWINGS
[0015] The utility model will be further described below in combination with the drawings:
[0016] Figure 1 It is a sectional view of the boiler safety valve of the utility model;
[0017] Figure 2 It is Figure 1 It is an enlarged schematic view of A in the middle;
[0018] Figure 3 It is a schematic view of the overall structure of the valve body of the utility model.
[0019] In the drawing: 1 valve body, 2 valve seat, 21 sealing seat, 22 fillet transition surface, 23 clamping groove, 24 internal thread, 25 external thread, 3 valve disc, 31 convex ring, 32 sealing ring, 33 matching curved surface, 34 guide base, 35 annular groove, 4 spring, DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.
[0021] The technical scheme of the utility model is described in detail below with specific examples. The following specific examples can be combined or replaced according to actual conditions, and the same or similar concepts or processes can not be described in some examples.
[0022] As shown in Figures 1 to 3 The utility model provides a boiler safety valve, including valve body 1, valve seat 2 and valve clack 3, valve seat 2 is fixed in valve body 1, valve clack 3 is connected with valve body 1 through spring 4, and with valve seat 2 forms sealed fit surface, valve clack 3 is equipped with the convex ring 31 of downward extension, the convex ring 31 is equipped with sealing washer 32, the upper end of valve seat 2 is equipped with sealing seat 21, the inner side wall of sealing seat 21 to top end surface is equipped with round corner transition surface 22, the outer surface of sealing washer 32 is equipped with cooperation curved surface 33, when valve clack 3 with valve seat 2 abuts, cooperation curved surface 33 with round corner transition surface 22 abuts.
[0023] Valve body 1 is the existing conventional valve body 1, and valve seat 2 is usually fixed on the pressure outlet pipeline of equipment and is a passage for medium outflow; valve clack 3 is tightly attached to valve seat 2 and plays a sealing role; the rear end of valve clack 3 is provided with a valve rod, the valve rod is in sliding connection with valve body 1, and spring 4 is arranged on the valve rod; under normal working conditions, the pressure in the system is within the design allowable range. At this time, the pre-tightening force of spring 4 tightly presses valve clack 3, so that valve clack 3 maintains airtight sealing with valve seat 2, and the medium cannot leak out of the safety valve; once the system is abnormal, the pressure rapidly rises and exceeds the preset safety value, the excessively high pressure acts on the bottom of valve clack 3, generating an upward thrust. When the thrust is sufficient to overcome the pre-tightening force of spring 4, valve clack 3 starts to lift upward and gradually leaves valve seat 2, and the medium enclosed in the system instantly finds a release passage and rapidly discharges outward along the gap between valve seat 2 and valve clack 3, thereby avoiding disastrous consequences such as pipeline rupture and container explosion caused by continuous high pressure.
[0024] On the side of the valve disc 3 towards the valve seat 2, a downwardly extending convex ring 31 is provided, the convex ring 31 is a cylinder, a sealing ring 32 is sleeved on the cylinder, a sealing seat 21 is provided at the upper end of the valve seat 2, a fillet transition surface 22 is provided between the inner side wall of the sealing seat 21 to the top end surface, the outer surface of the sealing ring 32 is provided with a matching curved surface 33, when the valve disc 3 abuts against the valve seat 2, the matching curved surface 33 abuts against the fillet transition surface 22, the matching curved surface 33 of the sealing ring 32 is in tangential contact with the fillet transition surface 22, so that the contact between the matching curved surface 33 and the fillet transition surface 22 is better in uniformity, which is beneficial to improve the fit of the matching curved surface 33 with the fillet transition surface 22 in the subsequent deformation process, the valve disc 3 is continuously pressed downward by the elasticity of the spring 4, the matching curved surface 33 will gradually deform, that is, the contact between the matching curved surface 33 and the fillet transition surface 22 will change from linear contact to surface contact, which ensures that there is no gap between the sealing ring 32 and the sealing seat 21, and again, due to the deformation of the matching curved surface 33, pressure is generated on the fillet transition surface 22, so that a certain frictional resistance is generated between the two, which can ensure that the sealing ring 32 cannot easily separate, thereby improving the sealing performance of the sealing ring 32.
[0025] The cross section of the sealing ring 32 is circular, that is, the sealing ring 32 adopts an O-shaped sealing ring, which ensures that the contact with the fillet transition surface 22 can gradually change from linear contact to surface contact.
[0026] The opening direction of the fillet transition surface 22 is towards the inside of the valve seat 2, and the top end surface of the opening of the fillet transition surface 22 is parallel to the inner side wall of the valve seat 2; the inward opening ensures that the sealing ring 32 sleeved on the convex ring 31 can be in contact, and the top end of the opening of the fillet transition surface 22 is parallel to the inner side wall of the valve seat 2, which ensures that the sealing ring 32 can better cut into the fillet transition surface 22.
[0027] The radius of the sealing ring 32 is the same as the radius of the sealing ring 32; it ensures that the matching curved surface 33 of the sealing ring 32 can completely fit the fillet transition surface 22, thereby improving the sealing performance.
[0028] The sealing seat 21 is threadedly connected with the valve seat 2, the sealing seat 21 has a clamping groove 23, and the clamping groove 23 is clamped on the upper end of the valve seat 2; the sealing seat 21 can be disassembled from the valve seat 2, which facilitates disassembly of the sealing seat 21 and the fillet transition surface 22 for sealing, and positioning is achieved through the clamping groove 23, so that the installation of the sealing seat 21 is more accurate.
[0029] The upper end of the valve seat 2 has an external thread 25, and the side of the sealing seat 21 located in the clamping groove 23 has an internal thread 24 matched with the external thread 25; the threaded connection is convenient for disassembly and has good sealing performance.
[0030] The valve body 1 and the valve disc 3 are further provided with a guide base 34, and the valve disc 3 is in sliding connection with the guide base 34, so that the stability of the movement of the valve disc 3 is ensured, and the service life of the safety valve is prolonged.
[0031] The outer periphery of the convex ring 31 is provided with an annular groove 35 for positioning the sealing ring 32; the annular groove is arranged on the outer periphery of the convex ring 31, the sealing ring 32 is clamped into the annular groove 35, the sealing ring 32 is ensured from sliding on the convex ring 31, and the sealing property of the sealing ring 32 is ensured.
[0032] The sealing ring 32 is embedded in the annular groove 35 and a part of the surface is in abutment with the inner wall of the annular groove 35; a part of the surface can be in abutment with the round corner transition surface 22, and a sealing surface is formed.
[0033] In addition to the preferred embodiments, the utility model also has other implementation manners, and all other embodiments obtained by the person skilled in the art based on the embodiments in the utility model without creative labor belong to the range of the utility model claimed.
Claims
1. A boiler safety valve comprising a valve body, a valve seat fixed in the valve body, and a valve disc connected to the valve body by a spring and forming a sealing surface with the valve seat, characterized in that The valve disc is provided with a convex ring extending downward, the convex ring is provided with a sealing ring, the upper end of the valve seat is provided with a sealing seat, the inner side wall of the sealing seat to the top end surface is provided with a round corner transition surface, the outer surface of the sealing ring is provided with a matching curved surface, and the matching curved surface is in abutment with the round corner transition surface when the valve disc is in abutment with the valve seat.
2. A boiler safety valve according to claim 1, characterised in that The matching curved surface of the sealing ring is circular.
3. The boiler safety valve according to claim 1, wherein The opening direction of the round corner transition surface is towards the inner side of the valve seat, and the top end surface of the opening of the round corner transition surface is parallel to the inner side wall of the valve seat.
4. The boiler safety valve according to claim 1, wherein The radius of the sealing ring is the same as the radius of the sealing ring.
5. The boiler safety valve according to claim 1, wherein The sealing seat is threadedly connected with the valve seat, the sealing seat is provided with a clamping groove, and the clamping groove is clamped at the upper end of the valve seat.
6. A boiler safety valve according to claim 5, characterised in that The upper end of the valve seat is provided with an outer thread, and the sealing seat located on one side of the clamping groove is provided with an inner thread matched with the outer thread.
7. The boiler safety valve according to claim 1, wherein A guide base is further arranged between the valve body and the valve disc, and the valve disc is in sliding connection with the guide base.
8. The boiler safety valve according to claim 1, wherein The outer periphery of the convex ring is provided with an annular groove for positioning the sealing ring.
9. A boiler safety valve according to claim 8, characterised in that The sealing ring is embedded in the annular groove and a part of the surface is in abutment with the inner wall of the annular groove.