Full-bore hard sealing semi-ball valve for heat supply pipeline

Abstract

The utility model discloses a heat supply pipeline full-bore hard sealing half ball valve, which relates to the technical field of half ball valves, and comprises a valve body, a half ball valve core, an annular sealing ring and an annular valve seat, the sealing ring is sleeved outside an annular step, a plurality of inserting blocks are arranged on the periphery of the annular step, a plurality of connecting grooves are arranged on the outer surface of the sealing ring, and the inserting blocks are inserted into the connecting grooves. A plurality of through grooves are formed in the inner surface, located at the end of the connecting groove, of the sealing ring, a second screw connected with the semi-spherical valve element is arranged on the sealing ring, a first air bag ring is arranged on one side face of the annular step, the outer circle face of the annular step is sleeved with a second air bag ring, and the second air bag ring is communicated with the first air bag ring. According to the utility model, the purpose of quickly disassembling and assembling the sealing ring can be realized, and the convenience of disassembling and assembling the sealing ring can be greatly improved, so that the later disassembling and assembling maintenance work can be more convenient, quick and time-saving and labor-saving, meanwhile, multiple sealing between the semi-spherical valve core and the sealing ring can be realized, and the sealing property between the semi-spherical valve core and the sealing ring can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hemispherical valves, in particular to a full-diameter hard-sealed hemispherical valve for a heating pipeline. Background Art

[0002] The eccentric semi-ball valve is a relatively new type of ball valve. Its unique structural advantages include frictionless opening and closing, wear-resistant seals, and low opening and closing torque, which reduces the size of the actuator required. Equipped with a multi-turn electric actuator, it enables both regulation and tight shutoff of the media. It is widely used in applications requiring strict shutoff in the petroleum, chemical, urban water supply and drainage, and urban heating systems.

[0003] The prior art CN 215293674 U discloses an eccentric hemispherical valve with a hard seal, comprising a valve body, a flange, a ball, a spherical crown, a sealing ring and a valve seat. Although the utility model has a hard seal structure, the valve body only needs to have a slot on the flange, and only an annular step needs to be processed on the spherical crown. Its casting mold can be the same as that of the soft seal, that is, there is no need to develop a new mold to adjust from a soft seal to a hard seal, which reduces costs and is simple to process. However, the stainless steel sealing ring in the hemispherical valve is installed on the hemispherical valve core by multiple screws. Although this installation method is stable and reliable, it is bound to make the disassembly and assembly of the stainless steel sealing ring inconvenient, which brings certain troubles to the subsequent replacement and maintenance work. In addition, there is a lack of a reliable sealing structure between the stainless steel sealing ring and the hemispherical valve core, and the medium being transported may still penetrate the gap between the two, resulting in its sealing performance being still average. Therefore, there is still room for improvement. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a full-diameter hard-sealed hemispherical valve for a heating pipeline, which solves the problems raised in the above-mentioned background technology.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a full-diameter hard-sealed hemispherical valve for a heating pipe, comprising a valve body, a hemispherical valve core, an annular sealing ring and an annular valve seat, an annular step is provided on the outside of the hemispherical valve core, the sealing ring is sleeved on the outside of the annular step, and a plurality of plugs are provided on the outer periphery of the annular step, a plurality of connecting grooves are provided on the outer surface of the sealing ring, the connecting grooves are connected to the inner surface of the sealing ring, a plurality of through grooves are provided on the inner surface of the sealing ring at the end of the connecting grooves, a second screw connected to the hemispherical valve core is provided on the sealing ring, a first airbag ring is provided on one side surface of the annular step, a second airbag ring is sleeved on the outer circumference of the annular step, the second airbag ring is connected to the first airbag ring, and the second airbag ring and the first airbag ring are both in contact with the sealing ring.

[0008] Optionally, a valve cavity is provided inside the valve body, the hemispherical valve core is arranged inside the valve cavity, and a valve stem is provided outside the hemispherical valve core.

[0009] Optionally, the valve seat is arranged at one side opening of the valve cavity, and one side of the valve seat abuts the outer surface of the sealing ring. A pressure cover is provided at one side opening of the valve cavity, the pressure cover abuts against a side of the valve seat away from the sealing ring, and a first screw is provided between the pressure cover and the valve body.

[0010] Optionally, the connecting groove is arc-shaped, and is divided into an inclined section and a flat section from one end close to the through groove to the other end. The inner side wall of the inclined section is inclined, and the inclined surface of the inner side wall of the inclined section gradually tilts toward the direction of the hemispherical valve core from the flat section to the through groove. The inner side wall of the flat section is planar, and the plug is in contact with the inner side wall of the flat section.

[0011] Optionally, a countersunk hole adapted to the second screw is provided on the outer surface of the sealing ring, a threaded hole is provided on the outer surface of the hemispherical valve core, and the second screw is connected to the threaded hole by passing through the countersunk hole.

[0012] Optionally, a first sealing groove adapted to the first airbag ring is opened on one side surface of the annular step, and the first airbag ring is arranged in the first sealing groove; a second sealing groove adapted to the second airbag ring is opened on the outer circular surface of the annular step, and the second airbag ring is arranged in the second sealing groove.

[0013] Optionally, a catheter is connected between the first airbag ring and the second airbag ring, and a groove adapted to the catheter is provided on the outer surface of the annular step, and the catheter is located in the groove.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The sealing ring can be disassembled and assembled, and a second screw is provided between the sealing ring and the hemispherical valve core, so that it is no longer necessary to disassemble and assemble multiple bolts during disassembly and assembly, thereby greatly improving the convenience of disassembly and assembly of the sealing ring, thereby making the subsequent disassembly and maintenance work more convenient, fast, time-saving and labor-saving. Moreover, during installation, the multiple plug-in blocks on the periphery can limit the extrusion of the sealing ring, so that each part of the sealing ring can be more tightly and reliably connected to the hemispherical valve core, while ensuring the uniformity of the force applied to each part of the sealing ring during installation, thereby ensuring the quality of the sealing ring installation;

[0017] 2. It can realize multiple seals between the hemispherical valve core and the sealing ring. Combined with the close fit between the hemispherical valve core and the sealing ring, the sealing between the two can be improved, which can effectively prevent the transported medium from penetrating the gap between the hemispherical valve core and the sealing ring, ensuring the normal use of the hemispherical valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of a partial cross-sectional structure of a hemispherical valve core of the utility model;

[0020] Figure 3 For this utility model Figure 2 A in the middle is an enlarged structural diagram;

[0021] Figure 4 This is a side view of the three-dimensional structure of the hemispherical valve core and the sealing ring of the utility model;

[0022] Figure 5 This is a schematic diagram of the exploded three-dimensional structure of the hemispherical valve core and the sealing ring of the utility model;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of the hemispherical valve core of the utility model from a side view;

[0024] Figure 7 This is a schematic side view of the three-dimensional structure of the sealing ring of the utility model.

[0025] In the figure: 1. valve body; 2. hemispherical valve core; 201. first sealing groove; 202. second sealing groove; 203. groove; 3. sealing ring; 4. gland; 5. first screw; 6. first airbag ring; 7. second airbag ring; 8. conduit; 9. connecting groove; 901. inclined section; 902. flat section; 10. through groove; 11. plug-in block; 12. second screw; 13. threaded hole; 14. countersunk hole; 15. valve seat; 16. valve stem; 17. annular step. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The utility model provides Figures 1 to 7 1 and 1 , and a pair of spherical valves are provided on the outside of the valve body 1 . The spherical valve core 2 is provided with a valve stem 16 and a valve seat 15 ... The inner surface of the sealing ring 3 is provided with six through grooves 10 at the end of the connecting groove 9. The six plugs 11, the six connecting grooves 9 and the six through grooves 10 are distributed in a circular array along the axis of the sealing ring 3. The connecting groove 9 is arc-shaped, and the connecting groove 9 is divided into an inclined section 901 and a flat section 902 from one end close to the through groove 10 to the other end. The inner side wall of the inclined section 901 is inclined, and the inclined surface of the inner side wall of the inclined section 901 gradually inclines toward the direction of the hemispherical valve core 2 from the flat section 902 to the through groove 10. The inner side wall of the flat section 902 is planar, and the plug 11 abuts against the inner side wall of the flat section 902. A second screw 12 connected to the hemispherical valve core 2 is provided on the sealing ring 3, and a countersunk hole 14 compatible with the second screw 12 is provided on the outer surface of the sealing ring 3. A threaded hole 13 is provided on the outer surface of the hemispherical valve core 2, and the second screw 12 is connected to the threaded hole 13 by passing through the countersunk hole 14.

[0028] The working principle is as follows: when the sealing ring 3 needs to be disassembled, first unscrew the second screw 12 from the hemispherical valve core 2 and the sealing ring 3, then twist the sealing ring 3 to rotate the sealing ring 3 along its own axis and make the flat section 902 of the connecting groove 9 separate from the plug 11 on the hemispherical valve core 2, until the sealing ring 3 rotates until the through groove 10 is aligned with the plug 11, then the sealing ring 3 can be pulled outward, at this time the through groove 10 on the sealing ring 3 slides past the outside of the plug 11, until the sealing ring 3 is completely separated from the hemispherical valve core 2, and the disassembly is completed;

[0029] When installing the sealing ring 3, align the through groove 10 on the sealing ring 3 with the plug 11, and then put the sealing ring 3 on the annular step 17. At this time, the through groove 10 slides over the plug 11, so that the plug 11 is located at one end of the connecting groove 9 on the sealing ring 3, that is, one end of the inclined surface section 901. Then, twist the sealing ring 3 to make the inclined surface section 901 slide over the plug 11. In this process, the plug 11 contacts the inclined surface of the inclined surface section 901. Under the action of the inclined surface of the inclined surface section 901, the plug 11 can apply an extrusion force toward the hemispherical valve core 2 to the sealing ring 3, so that the inner surface of the sealing ring 3 is in contact with the annular step on the hemispherical valve core 2. The ladder 17 fits tightly until it is screwed until the connecting groove 9 is located in the flat section 902. At this time, the countersunk hole 14 on the sealing ring 3 is just aligned with the threaded hole 13 on the hemispherical valve core 2. Then the second screw 12 is passed through the countersunk hole 14 and screwed into the threaded hole 13 to fix the sealing ring 3 on the hemispherical valve core 2, thereby achieving the purpose of installing and fixing the sealing ring 3. In combination with the extrusion limiting effect of multiple peripheral plug-in blocks 11 on the sealing ring 3, each part of the sealing ring 3 can be more tightly and reliably connected to the hemispherical valve core 2, while ensuring the uniformity of the installation force of each part of the sealing ring 3.

[0030] The utility model provides Figures 1 to 3 The second embodiment of the full-diameter hard-sealed hemispherical valve for the heating pipeline is shown as follows: a first airbag ring 6 is provided on one side of the annular step 17, and a first sealing groove 201 adapted to the first airbag ring 6 is opened on one side of the annular step 17, and the first airbag ring 6 is arranged in the first sealing groove 201. The outer cylindrical surface of the annular step 17 is sleeved with a second airbag ring 7, and the outer cylindrical surface of the annular step 17 is provided with a second sealing groove 202 adapted to the second airbag ring 7, and the second airbag ring 7 is arranged in the second sealing groove 202. A conduit 8 is connected between the first airbag ring 6 and the second airbag ring 7, and a groove 203 adapted to the conduit 8 is opened on the outer surface of the annular step 17. The conduit 8 is located in the groove 203, and the second airbag ring 7 and the first airbag ring 6 are both in contact with the sealing ring 3.

[0031] The working principle is as follows: when the sealing ring 3 is not installed, the thickness of the first airbag ring 6 is greater than the thickness of the first sealing groove 201, and the outer diameter of the second airbag ring 7 is smaller than the outer diameter of the annular second sealing groove 202. Then, when the sealing ring 3 is installed on the annular step 17 on the hemispherical valve core 2, when the sealing ring 3 is twisted, under the cooperation of the inclined surface section 901 and the plug 11, the plug 11 can squeeze the sealing ring 3 toward the hemispherical valve core 2 through the inclined surface section 901, and thereby gradually fit the sealing ring 3 tightly with the annular step 17. In this process, the inner surface of the sealing ring 3 will first squeeze the first airbag ring 6, and causes the first airbag ring 6 to undergo elastic deformation with reduced thickness. At this time, the internal space of the first airbag ring 6 is reduced due to extrusion, and the internal air is discharged into the second airbag ring 7 through the conduit 8, which can cause the second airbag ring 7 to expand and deform, thereby increasing the outer diameter of the second airbag ring 7 and closely clinging to the inner surface of the sealing ring 3. At this time, the first airbag ring 6 and the second airbag ring 7 are both closely clinging to the inner surface of the sealing ring 3, which can achieve multiple seals between the hemispherical valve core 2 and the sealing ring 3, and the close fit between the hemispherical valve core 2 and the sealing ring 3 itself can improve the sealing between the two.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A full-diameter hard-sealed hemispherical valve for a heating pipe, comprising a valve body (1), a hemispherical valve core (2), an annular sealing ring (3) and an annular valve seat (15), characterized in that: The outer portion of the hemispherical valve core (2) is provided with an annular step (17), the sealing ring (3) is sleeved on the outer portion of the annular step (17), and a plurality of plug-in blocks (11) are provided on the outer periphery of the annular step (17), the outer surface of the sealing ring (3) is provided with a plurality of connecting grooves (9), the connecting grooves (9) are communicated with the inner surface of the sealing ring (3), the inner surface of the sealing ring (3) is provided with a plurality of through grooves (10) at the end of the connecting grooves (9), the sealing ring (3) is provided with a second screw (12) connected to the hemispherical valve core (2), a side surface of the annular step (17) is provided with a first airbag ring (6), the outer circumferential surface of the annular step (17) is sleeved with a second airbag ring (7), the second airbag ring (7) is communicated with the first airbag ring (6), and the second airbag ring (7) and the first airbag ring (6) are both in contact with the sealing ring (3).

2. The full-diameter hard-sealed hemispherical valve for heating pipes according to claim 1, characterized in that: A valve cavity is provided inside the valve body (1), the hemispherical valve core (2) is arranged inside the valve cavity, and a valve stem (16) is provided outside the hemispherical valve core (2).

3. The full-diameter hard-sealed hemispherical valve for heating pipes according to claim 2, characterized in that: The valve seat (15) is arranged at one side opening of the valve cavity, and one side of the valve seat (15) abuts against the outer surface of the sealing ring (3). A pressure cover (4) is provided at one side opening of the valve cavity, and the pressure cover (4) abuts against a side of the valve seat (15) away from the sealing ring (3), and a first screw (5) is provided between the pressure cover (4) and the valve body (1).

4. The full-diameter hard-sealed hemispherical valve for heating pipes according to claim 1, characterized in that: The connecting groove (9) is arc-shaped, and the connecting groove (9) is divided into an inclined section (901) and a flat section (902) from one end close to the through groove (10) to the other end. The inner side wall of the inclined section (901) is inclined, and the inclined surface of the inner side wall of the inclined section (901) gradually tilts toward the direction of the hemispherical valve core (2) from the flat section (902) to the through groove (10). The inner side wall of the flat section (902) is plane-shaped, and the plug (11) abuts against the inner side wall of the flat section (902).

5. The full-diameter hard-sealed hemispherical valve for heating pipes according to claim 1, characterized in that: The outer surface of the sealing ring (3) is provided with a countersunk hole (14) adapted to the second screw (12), and the outer surface of the hemispherical valve core (2) is provided with a threaded hole (13), and the second screw (12) is connected to the threaded hole (13) by passing through the countersunk hole (14).

6. The full-diameter hard-sealed hemispherical valve for heating pipes according to claim 1, characterized in that: A first sealing groove (201) adapted to the first airbag ring (6) is provided on one side surface of the annular step (17), and the first airbag ring (6) is arranged in the first sealing groove (201). A second sealing groove (202) adapted to the second airbag ring (7) is provided on the outer circumferential surface of the annular step (17), and the second airbag ring (7) is arranged in the second sealing groove (202).

7. The full-diameter hard-sealed hemispherical valve for heating pipes according to claim 6, characterized in that: A catheter (8) is connected between the first airbag ring (6) and the second airbag ring (7), and a groove (203) adapted to the catheter (8) is provided on the outer surface of the annular step (17), and the catheter (8) is located in the groove (203).

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