Anti-jamming high-stability ball valve

Abstract

The anti-jamming high-stability ball valve comprises a valve body, a long-neck valve cover, a valve rod and a ball body, the long-neck valve cover is installed on the upper portion of the valve body, the valve rod penetrates through the long-neck valve cover and extends into the valve body, the inner end of the valve rod is in linkage connection with the ball body, and valve seats are installed at the positions, corresponding to the two ends of the ball body, of the inner wall of the valve body. A heating assembly is arranged on the long-neck valve cover and comprises a heating wire, the long-neck valve cover comprises a bottom cover, an inner shell, an outer shell and an upper cover, the inner shell and the outer shell are of a sleeve structure and are concentrically arranged, the upper cover is installed at the top ends of the inner shell and the outer shell, and the bottom cover is installed at the bottom ends of the inner shell and the outer shell, so that an annular heating cavity is formed between the inner shell and the outer shell; the heating wire is spirally wound in the annular heating cavity, and the side upper portion and the side lower portion of the shell are each provided with an outer through hole allowing the two ends of the heating wire to stretch out and be connected with an external wire. The anti-jamming valve has the anti-jamming function, is good in structural stability and reliable in work, and can be normally used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-jamming and highly stable ball valve. Background Art

[0002] The molten salt technology for solar thermal power generation is a new trough technology that directly uses molten salt as the heat absorption, heat transfer, and heat storage working medium. It is a new solar thermal power generation technology different from the traditional heat transfer oil heat transfer and molten salt heat storage. The tower technology, dish technology, and Fresnel solar thermal power generation technology routes all use binary molten salt as the heat storage medium. The molten salt ball valve is mainly applied to the molten salt conveying pipeline of molten salt power generation enterprises, playing the role of cutting off or connecting the pipeline medium.

[0003] Since the high-temperature molten salt is a high-temperature fluid, in order to ensure that the temperature of the upper end of the valve stem and the valve cover will not be too high, the valve cover and the valve stem are usually lengthened. Among them, the valve cover is a long-neck valve cover. However, this design also has other defects. For example, the temperature inside the long-neck valve cover is lower at positions farther away from the valve body. Therefore, during daily use, the molten salt is very likely to crystallize at the position near the upper end inside the long-neck valve cover of this type of ball valve, resulting in the situation of valve stem jamming, and its structural stability is poor, which easily affects the normal use of the valve. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an anti-jamming and highly stable ball valve. The utility model has the function of anti-jamming, good structural stability, reliable operation, and can ensure the long-term normal use of the valve.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an anti-jamming and highly stable ball valve, including a valve body, a long-neck valve cover, a valve stem, and a ball. The long-neck valve cover is installed on the upper part of the valve body. The valve stem penetrates through the long-neck valve cover and extends into the valve body. And the inner end of the valve stem is linked with the ball arranged inside the valve body to drive the ball to rotate. Valve seats for forming a sealing fit with the ball when the valve is closed are respectively installed at positions on the inner wall of the valve body corresponding to both ends of the ball. A heating component is arranged on the long-neck valve cover. The heating component includes a heating wire. The long-neck valve cover includes a bottom cover, an inner shell, an outer shell, and an upper cover. The inner shell and the outer shell are in a sleeve structure, and the inner shell and the outer shell are concentrically arranged. The upper cover is installed at the top of the inner shell and the outer shell. The bottom cover is installed at the bottom of the inner shell and the outer shell, so that an annular heating cavity coaxial with the valve stem is formed between the inner shell and the outer shell. The heating wire is spirally wound in the annular heating cavity. And an outer through hole for the two ends of the heating wire to extend out and be connected with external wires is respectively opened in the upper part and the lower part of the side of the outer shell.

[0006] By adopting the above technical solution, a heating component is arranged on the outer periphery of the long-neck valve cover. When the heating wire of the heating component is energized, the heating wire compensates and conveys heat to the long-neck valve cover, which can effectively prevent the molten salt inside from crystallizing due to the low temperature at the upper end of the long-neck valve cover, has the function of preventing jamming, has good structural stability, reliable operation, and can ensure the long-term normal use of the valve.

[0007] The present utility model is further arranged such that a heat-conducting silicone grease is filled in the annular heating cavity.

[0008] By adopting the above technical solution, it has good heat-conducting effect and can evenly and effectively conduct the heat generated by the heating wire to the long-neck valve cover.

[0009] The present utility model is further arranged such that a heat-insulating foam is arranged on the inner side of the outer shell.

[0010] By adopting the above technical solution, it can effectively prevent the internal heat from being conducted to the air along the outer wall of the outer shell and being lost, so that more heat is conducted along the inner circumference, upper and lower sides of the long-neck valve cover.

[0011] The present utility model is further arranged such that the bottom cover, the inner shell, the outer shell and the upper cover are connected together by welding.

[0012] By adopting the above technical solution, it is not only beneficial to the preliminary assembly, but also has good structural firmness.

[0013] The present utility model is further arranged such that a connector for the outer end of the heating wire to pass through is respectively installed at the positions corresponding to the outer ends of the two outer through holes on the outer shell, and a plurality of locking protrusions for abutting against the outer side of the heating wire are uniformly arranged along the circumferential direction on the inner side of the connector.

[0014] By adopting the above technical solution, setting the connector can make the heating wire extend in a specific direction, which is beneficial to wiring, and the locking protrusions arranged on the inner side of the connector abut against the heating wire, which can ensure the firmness of the heating wire installation structure and prevent it from loosening.

[0015] The present utility model is further arranged such that an installation groove is respectively arranged at the positions corresponding to both ends of the sphere on the inner wall of the valve body, the valve seat is arranged in the corresponding installation groove, and a plurality of springs are arranged in a circumferential array between the inner end of the valve seat and the installation groove.

[0016] By adopting the above technical solution, setting the floating valve seat can avoid problems such as poor sealing performance caused by thermal expansion and contraction or jamming between the valve seat and the sphere. At the same time, when the sealing surface of the valve seat is worn, the valve seat can also be always abutted against the surface of the sphere by the action of the spring, ensuring good sealing performance when the valve is closed.

[0017] The utility model is further configured such that an extension portion extending in the circumferential direction is provided on the inner circumference of the valve seat, and the extension portion is in contact with the inner wall of the valve body, so that a floating chamber is formed between the valve seat and the mounting groove. The spring is arranged in the floating chamber. A first sealing ring for sealing cooperation with the inner circular surface of the mounting groove is installed on the inner circular surface of the valve seat, and a second sealing ring for sealing cooperation with the inner wall of the valve body is installed on the inner circular surface of the extension portion. The first sealing ring and the second sealing ring are respectively arranged on both sides of the floating chamber.

[0018] By adopting the above technical solution, not only can the sealing performance between the valve seat and the mounting groove be ensured, but also the intrusion of molten salt into the floating chamber can be avoided, thereby affecting the service performance of the spring.

[0019] The utility model is further configured such that a support ring is also slidably arranged in the mounting groove. The inner circular surface of the support ring is in contact with the outer circular surface of the extension portion, the outer circular surface of the support ring is in contact with the inner circular surface of the mounting groove, one end of the support ring abuts against the valve seat, and a plurality of positioning grooves equivalent in number to the springs are arranged at the other end of the support ring. The end of the spring close to the valve seat is embedded in the corresponding positioning groove.

[0020] By adopting the above technical solution, the support ring can equalize the spring forces of multiple springs, so that the spring forces of multiple springs are evenly applied to the valve seat. At the same time, the setting of the support ring can also reduce the thickness of the valve seat, and the cost is lower when replacing the valve seat in the later stage.

[0021] The utility model is further configured such that a lower hole is also provided at the bottom of the valve body, and an end cover is installed at the position corresponding to the outer end of the lower hole at the bottom of the valve body. A support shaft is arranged in the lower hole, the support shaft is coaxial with the valve stem, the lower end of the support shaft abuts against the inner end of the end cover, the upper end of the support shaft is arranged inside the valve body, and a circular groove matching with the upper end of the support shaft is provided at the lower end of the sphere.

[0022] By adopting the above technical solution, the setting of the support shaft to support the sphere can further improve the stability of the sphere rotation, thereby ensuring the stability of the valve opening and closing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the whole of the utility model;

[0024] Figure 2 is Figure 1 an enlarged structural diagram of part A in

[0025] Figure 3 is Figure 1 an enlarged structural diagram of part B in

[0026] In the figure: 1, valve body; 2, long-neck valve cover; 3, valve stem; 4, ball; 5, valve seat; 6, heating wire; 7, bottom cover; 8, inner shell; 9, outer shell; 10, upper cover; 11, annular heating chamber; 12, outer through hole; 13, thermal conductive silicone grease; 14, heat insulation foam; 15, joint; 16, locking protrusion; 17, installation groove; 18, spring; 19, extension part; 20, floating chamber; 21, first sealing ring; 22, second sealing ring; 23, support ring; 24, positioning groove; 25, lower hole; 26, end cover; 27, support shaft; 28, circular groove. Detailed implementation manner

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment: As shown in the attached Figures 1 to 3 The anti-jamming and highly stable ball valve shown includes a valve body 1, a long-neck valve cover 2, a valve stem 3 and a ball 4. The long-neck valve cover 2 is installed on the upper part of the valve body 1. The valve stem 3 passes through the long-neck valve cover 2 and extends into the interior of the valve body 1. And the inner end of the valve stem 3 is linked with the ball 4 arranged inside the valve body 1 for driving the ball 4 to rotate. Valve seats 5 for forming a sealing fit with the ball 4 when the valve is closed are respectively installed at positions corresponding to both ends of the ball 4 on the inner wall of the valve body 1; a heating assembly is provided on the long-neck valve cover 2. The heating assembly includes a heating wire 6. The long-neck valve cover 2 includes a bottom cover 7, an inner shell 8, an outer shell 9 and an upper cover 10. The inner shell 8 and the outer shell 9 are in a sleeve structure, and the inner shell 8 and the outer shell 9 are concentrically arranged. The upper cover 10 is installed at the top of the inner shell 8 and the outer shell 9, and the bottom cover 7 is installed at the bottom of the inner shell 8 and the outer shell 9, so that an annular heating chamber 11 coaxial with the valve stem 3 is formed between the inner shell 8 and the outer shell 9. The heating wire 6 is spirally wound in the annular heating chamber 11, and outer through holes 12 for allowing both ends of the heating wire 6 to extend out and be connected to external wires are respectively opened in the upper part and the lower part on the side of the outer shell 9. A heating assembly is arranged on the outer periphery of the long-neck valve cover 2. When the heating wire 6 of the heating assembly is energized, the heating wire 6 compensates and conveys heat to the long-neck valve cover 2, which can effectively prevent the molten salt inside from crystallizing due to the low temperature at the upper end of the long-neck valve cover 2, has the function of anti-jamming, has good structural stability, reliable operation, and can ensure the long-term normal use of the valve.

[0029] As shown in the attached Figure 1 shown, the annular heating chamber 11 is filled with thermal conductive silicone grease 13. It has good heat conduction effect and can evenly and effectively conduct the heat generated by the heating wire 6 to the long-neck valve cover 2.

[0030] As shown in the attached Figure 1 figure, a heat insulation foam 14 is provided on the inner side of the outer shell 9. It can effectively prevent the internal heat from being conducted to the air along the outer wall of the outer shell 9 and being lost, so that more heat is conducted along the inner circumference and the upper and lower sides of the long-neck valve cover 2.

[0031] As shown in the attached Figure 2 figure, the bottom cover 7, the inner shell 8, the outer shell 9 and the upper cover 10 are connected together by welding. This connection method is not only conducive to the pre-assembly, but also has good structural firmness.

[0032] As shown in the attached Figure 1 and the attached Figure 2 figure, at the positions corresponding to the outer ends of the two outer through holes 12 on the outer shell 9, a joint 15 for the outer end of the heating wire 6 to pass through is respectively installed. The joint 15 can be welded on the outer shell 9 or installed on the outer shell 9 by means of threaded connection. A plurality of locking protrusions 16 for tightly abutting against the outer side of the heating wire 6 are uniformly arranged along the circumference on the inner side of the joint 15. The setting of the joint 15 can make the heating wire 6 extend in a specific direction, which is conducive to wiring. And the locking protrusions 16 arranged on the inner side of the joint 15 tightly abut against the heating wire 6, which can ensure the firmness of the installation structure of the heating wire 6 and prevent it from loosening.

[0033] As shown in the attached Figure 1 and the attached Figure 3 figure, at the positions corresponding to both ends of the sphere 4 on the inner wall of the valve body 1, an installation groove 17 is respectively provided. The valve seat 5 is arranged in the corresponding installation groove 17, and a plurality of springs 18 are circumferentially and arrayedly distributed between the valve seat 5 and the inner end of the installation groove 17. The springs 18 are heat-resistant springs 18. The setting of the floating valve seat 5 can avoid the problems of poor sealing performance caused by thermal expansion and contraction or jamming between the valve seat 5 and the sphere 4. At the same time, when the sealing surface of the valve seat 5 is worn, the valve seat 5 can also be always tightly abutted against the surface of the sphere 4 through the action of the springs 18 to ensure good sealing performance when the valve is closed.

[0034] As shown in the attached Figure 1 and the attached Figure 3As shown, an extension portion 19 extending circumferentially is provided on the inner circumference of the valve seat 5. The extension portion 19 is in contact with the inner wall of the valve body 1, so that a floating chamber 20 is formed between the valve seat 5 and the mounting groove 17. The spring 18 is arranged in the floating chamber 20. A first sealing ring 21 for sealing cooperation with the inner circular surface of the mounting groove 17 is installed on the inner circular surface of the valve seat 5. A second sealing ring 22 for sealing cooperation with the inner wall of the valve body 1 is installed on the inner circular surface of the extension portion 19. The first sealing ring 21 and the second sealing ring 22 are respectively arranged on both sides of the floating chamber 20. This design can not only ensure the sealing performance between the valve seat 5 and the mounting groove 17, but also prevent molten salt from invading into the floating chamber 20 and affecting the service performance of the spring 18.

[0035] As shown in the attached Figure 1 and the attached Figure 3 As shown, a support ring 23 is also slidably arranged in the mounting groove 17. The inner circular surface of the support ring 23 is in contact with the outer circular surface of the extension portion 19. The outer circular surface of the support ring 23 is in contact with the inner circular surface of the mounting groove 17. One end of the support ring 23 abuts against the valve seat 5. A plurality of positioning grooves 24 equivalent in number to the spring 18 are provided at the other end of the support ring 23. The end of the spring 18 close to the valve seat 5 is embedded in the corresponding positioning groove 24. The support ring 23 can evenly distribute the spring force of the plurality of springs 18, so that the spring force of the plurality of springs 18 is evenly applied to the valve seat 5. At the same time, the setting of the support ring 23 can also reduce the thickness of the valve seat 5, and the cost is lower when replacing the valve seat 5 later.

[0036] As shown in the attached Figure 1 As shown, a lower hole 25 is further provided at the bottom of the valve body 1. And a end cover 26 is installed at the position corresponding to the outer end of the lower hole 25 at the bottom of the valve body 1. The end cover 26 can be connected to the valve body 1 by screws or installed at the bottom of the valve body 1 by means of threaded connection. A support shaft 27 is arranged in the lower hole 25. The support shaft 27 is coaxial with the valve stem 3. The lower end of the support shaft 27 abuts against the inner end of the end cover 26. The upper end of the support shaft 27 extends into the valve body 1. A circular groove 28 that fits with the upper end of the support shaft 27 is provided at the lower end of the sphere 4. The setting of the support shaft 27 to support the sphere 4 can further improve the stability of the rotation of the sphere 4, thus ensuring the stability of the valve opening and closing process.

Claims

1. An anti-jamming high-stability ball valve, comprising a valve body (1), a long-necked valve cover (2), a valve stem (3) and a ball (4), wherein the long-necked valve cover (2) is mounted on the upper part of the valve body (1), the valve stem (3) penetrates the long-necked valve cover (2) and extends into the interior of the valve body (1), and the inner end of the valve stem (3) is linked to a ball (4) arranged inside the valve body (1) for driving the ball (4) to rotate, and valve seats (5) for forming a sealing fit with the ball (4) when the valve is closed are respectively mounted on the inner wall of the valve body (1) at positions corresponding to the two ends of the ball (4); the valve seats are characterized in that: The long-necked valve cover (2) is provided with a heating component, the heating component comprising a heating wire (6), the long-necked valve cover (2) comprising a bottom cover (7), an inner shell (8), an outer shell (9) and an upper cover (10), the inner shell (8) and the outer shell (9) being of a sleeve structure, and the inner shell (8) and the outer shell (9) being arranged concentrically, the upper cover (10) being mounted on the top ends of the inner shell (8) and the outer shell (9), the bottom cover (7) being mounted on the bottom ends of the inner shell (8) and the outer shell (9), so that an annular heating chamber (11) coaxial with the valve stem (3) is formed between the inner shell (8) and the outer shell (9), the heating wire (6) being spirally wound in the annular heating chamber (11), and an outer through hole (12) for allowing both ends of the heating wire (6) to extend out and be connected to an external wire is respectively provided on the upper and lower sides of the outer shell (9).

2. The anti-stuck high-stability ball valve according to claim 1, characterized in that: The annular heating chamber (11) is filled with heat-conducting silicone grease (13).

3. The anti-stuck high-stability ball valve according to claim 1, characterized in that: A heat-insulating foam (14) is provided on the inner side of the outer shell (9).

4. The anti-sticking high-stability ball valve according to claim 1, characterized in that: The bottom cover (7), the inner shell (8), the outer shell (9) and the upper cover (10) are connected together by welding.

5. The anti-sticking high-stability ball valve according to claim 1, characterized in that: A connector (15) for the outer end of the heating wire (6) to pass through is installed at the position corresponding to the outer ends of the two outer through holes (12) on the outer shell (9), and a plurality of locking protrusions (16) for abutting against the outer side of the heating wire (6) are evenly arranged on the inner side of the connector (15) along the circumferential direction.

6. The anti-sticking high-stability ball valve according to claim 1, characterized in that: A mounting groove (17) is respectively arranged on the inner wall of the valve body (1) at positions corresponding to the two ends of the spherical body (4); the valve seat (5) is arranged in the corresponding mounting groove (17); and a plurality of springs (18) are distributed in a circular array between the valve seat (5) and the inner end of the mounting groove (17).

7. The anti-sticking high-stability ball valve according to claim 6, characterized in that: The inner periphery of the valve seat (5) is provided with an extension portion (19) extending in the circumferential direction, and the extension portion (19) is fitted with the inner wall of the valve body (1), so that a floating chamber (20) is formed between the valve seat (5) and the mounting groove (17), and the spring (18) is arranged in the floating chamber (20). The inner circular surface of the valve seat (5) is provided with a first sealing ring (21) for forming a sealing fit with the inner circular surface of the mounting groove (17), and the inner circular surface of the extension portion (19) is provided with a second sealing ring (22) for forming a sealing fit with the inner wall of the valve body (1), and the first sealing ring (21) and the second sealing ring (22) are respectively arranged on both sides of the floating chamber (20).

8. The anti-sticking high-stability ball valve according to claim 7, characterized in that: A support ring (23) is also slidably arranged in the installation groove (17), the inner circular surface of the support ring (23) is in contact with the outer circular surface of the extension portion (19), the outer circular surface of the support ring (23) is in contact with the inner circular surface of the installation groove (17), one end of the support ring (23) is tightly pressed against the valve seat (5), and the other end of the support ring (23) is provided with a plurality of positioning grooves (24) whose number is equivalent to that of the spring (18), and one end of the spring (18) close to the valve seat (5) is embedded in the corresponding positioning groove (24).

9. The anti-sticking high-stability ball valve according to claim 1, characterized in that: The bottom of the valve body (1) is also provided with a lower hole (25), and an end cover (26) is installed at a position on the bottom of the valve body (1) corresponding to the outer end of the lower hole (25). A support shaft (27) is provided in the lower hole (25), and the support shaft (27) is coaxial with the valve stem (3). The lower end of the support shaft (27) is tightly abutted against the inner end of the end cover (26), and the upper end of the support shaft (27) is arranged inside the valve body (1). The lower end of the ball (4) is provided with a circular groove (28) that fits with the upper end of the support shaft (27).

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