Bidirectional pressing and rotating ball valve

Abstract

The utility model discloses a two-way pressing and rotating ball valve which comprises a valve body, a valve rod, a valve plate and a valve seat, the valve rod penetrates through the upper portion of the valve body and extends into the valve body to be in linkage connection with the valve plate, and the valve seat is installed in the valve body and used for being matched with the valve plate in a sealing mode when the valve is closed. A mounting groove is formed in the inner wall of the valve body in the medium flowing direction, the valve seat is arranged in the mounting groove in a sliding mode, a floating gap is formed between the inner end of the mounting groove and the inner end of the valve seat, and a positioning groove is formed in the position, corresponding to the outer end of the mounting groove, in the valve body. The mounting ring is mounted in the positioning groove through a plurality of positioning screws, the elastic assemblies are distributed on the mounting ring in a circumferential array mode, and the inner ends of the elastic assemblies abut against the outer end face of the valve seat. A floatable valve seat structure is adopted, a gap generated by abrasion between the valve plate and the valve seat can be compensated, and the reliable sealing performance between the valve plate and the valve seat is guaranteed when the valve is closed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a two-way pressure-rotation ball valve. Background Art

[0002] The rotary ball valve is a new type of combination of a butterfly valve and a semi-ball valve with a bidirectional metal hard seal. It has the functions and advantages of a butterfly valve and a semi-ball valve, and has many advantages such as small size, light weight, easy transportation, installation, and maintenance, reliable operation, and bidirectional sealing and zero leakage. However, when the rotary ball valve is frequently opened and closed and the medium is impacted for a long time, the sealing surface will wear, which will cause the medium to leak and affect the sealing effect. Therefore, designing a bidirectional pressure rotary ball valve with better sealing performance to solve the above problems has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0003] The utility model aims to provide a bidirectional pressure-rotating ball valve. The utility model adopts a floating valve seat structure, which can compensate for the gap between the valve plate and the valve seat caused by wear and tear, and ensure reliable sealing performance between the valve plate and the valve seat when the valve is closed.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a two-way pressure-rotating ball valve, including a valve body, a valve stem, a valve plate and a valve seat, the valve stem passes through the upper part of the valve body and extends into the interior of the valve body to be linked to the valve plate, the valve seat is installed in the valve body for sealing with the valve plate when the valve is closed; it also includes a mounting ring and multiple groups of elastic components, a mounting groove is provided on the inner wall of the valve body along the flow direction of the medium, the valve seat is slidably arranged in the mounting groove, and a floating gap is provided between the inner end of the mounting groove and the inner end of the valve seat, a positioning groove is provided at a position corresponding to the outer end of the mounting groove in the valve body, the mounting ring is installed in the positioning groove by multiple positioning screws, multiple groups of elastic components are distributed on the mounting ring in a circular array, and the inner ends of the multiple groups of elastic components are all tightly pressed against the outer end surface of the valve seat.

[0005] By adopting the above technical solution, the valve seat is set to a floating structure, and multiple groups of elastic components act evenly on the valve seat. When the valve is closed, the multiple groups of elastic components press the valve seat against the sealing surface of the valve plate so that the two can always fit closely. This structure can compensate for the gap between the valve plate and the valve seat caused by wear, thereby ensuring reliable sealing performance between the valve plate and the valve seat when the valve is closed.

[0006] The utility model is further configured as follows: the elastic component includes a base, a pressure ring and a return spring, the base is mounted on a mounting ring, a spring groove is provided at one end of the base close to the valve plate, the return spring is arranged in the spring groove, a plurality of guide rods corresponding to the elastic component are distributed in a circular array on the pressure ring, the guide rods extend into the corresponding spring grooves and are tightly pressed against the return spring, and the end of the pressure ring away from the guide rods is tightly pressed against the valve seat.

[0007] By adopting the above technical solution, the return spring applies spring force to the guide rod, so that the pressure ring is subjected to a force in the direction of the valve seat, and then the pressure ring pushes the valve seat to slide in the installation groove, so that when the valve is closed, it fits tightly with the sealing surface of the valve plate to prevent leakage.

[0008] The utility model is further configured that the installation ring is provided with a plurality of screw holes whose number is equal to that of the base, and the base is threadedly connected to the corresponding screw holes.

[0009] By adopting the above technical solution, the installation structure is simple and reliable, and the assembly and disassembly is very convenient.

[0010] The utility model is further configured that an inner hexagonal groove is provided at one end of the base away from the valve plate.

[0011] By adopting the above technical solution, the hexagonal groove can be used for tools to be inserted and rotate the base, which is more convenient for disassembly and assembly operations.

[0012] The utility model is further configured such that the elastic component also includes a locking nut, the locking nut is threadedly connected in the corresponding screw hole, and the locking nut is tightly abutted against one end of the base having an internal hexagonal groove, the locking nut is provided with an internal hexagonal hole, and the area of ​​the internal hexagonal hole is larger than the area of ​​the internal hexagonal groove.

[0013] By adopting the above technical solution, when the anti-loosening nut is pressed against the base, the thread friction between the base and the screw hole can be increased, thereby increasing the firmness of the base installation.

[0014] The utility model is further configured that a pressure relief hole communicating with the spring groove and the inner hexagonal groove is provided in the base.

[0015] By adopting the above technical solution, the provision of the pressure relief hole can ensure that the guide rod can slide smoothly in the spring groove.

[0016] The utility model is further configured that a plurality of positioning grooves are provided on the inner end surface of the positioning groove, a connecting block is inserted into the positioning groove, and the connecting block is welded to the positioning groove, and a threaded groove for screwing the positioning screw is provided on the connecting block.

[0017] By adopting the above technical solution, the valve body can be directly cast, the thread groove is set on the connecting block, and then the connecting block is welded to the valve body, which makes processing more convenient.

[0018] The utility model is further configured that the outer end of the installation ring is provided with a recessed portion for embedding the nut of the positioning screw.

[0019] By adopting the above technical solution, it is possible to prevent the nut of the positioning screw from protruding from the end surface of the mounting ring, making it easier to install the valve.

[0020] The utility model is further configured that a sealing ring is installed on the outer periphery of the valve seat for forming a sealing fit with the inner wall of the installation groove.

[0021] By adopting the above technical solution, the sealing performance between the outer periphery of the valve seat and the inner wall of the installation groove can be ensured, and the leakage of the medium from the gap between the two can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0024] In the figure: 1. valve body; 2. valve stem; 3. valve plate; 4. valve seat; 5. mounting ring; 6. elastic component; 7. mounting groove; 8. floating gap; 9. positioning groove; 10. positioning screw; 11. base; 12. pressure ring; 13. return spring; 14. spring groove; 15. guide rod; 16. screw hole; 17. hexagon socket groove; 18. anti-loosening nut; 19. hexagon socket hole; 20. pressure relief hole; 21. positioning groove; 22. connecting block; 23. threaded groove; 24. recess; 25. sealing ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example: As attached Figure 1 and attached Figure 2A two-way pressure-rotating ball valve shown in the figure comprises a valve body 1, a valve stem 2, a valve plate 3 and a valve seat 4, wherein the valve stem 2 penetrates the upper part of the valve body 1 and extends into the interior of the valve body 1 to be linked with the valve plate 3, and the valve seat 4 is installed in the valve body 1 for sealing with the valve plate 3 when the valve is closed; the rotating ball valve also comprises a mounting ring 5 and a plurality of groups of elastic components 6, a mounting groove 7 is provided on the inner wall of the valve body 1 along the flow direction of the medium, the valve seat 4 is slidably arranged in the mounting groove 7, and a floating gap 8 is provided between the inner end of the mounting groove 7 and the inner end of the valve seat 4, a positioning groove 9 is provided in the valve body 1 at a position corresponding to the outer end of the mounting groove 7, the mounting ring 5 is installed in the positioning groove 9 by a plurality of positioning screws 10, and the positioning screws 10 are hexagon socket screws, the plurality of groups of elastic components 6 are distributed on the mounting ring 5 in a circular array, and the inner ends of the plurality of groups of elastic components 6 are all tightly pressed against the outer end surface of the valve seat 4. The valve seat 4 is set to a floating structure, and multiple groups of elastic components 6 act evenly on the valve seat 4. When the valve is closed, the multiple groups of elastic components 6 press the valve seat 4 against the sealing surface of the valve plate 3 so that the two can always fit closely. This structure can compensate for the gap between the valve plate 3 and the valve seat 4 caused by wear, thereby ensuring reliable sealing performance between the valve plate 3 and the valve seat 4 when the valve is closed.

[0027] As attached Figure 1 and attached Figure 2 As shown, the elastic component 6 includes a base 11, a pressure ring 12 and a return spring 13. The base 11 is installed on the mounting ring 5. The base 11 is cylindrical in shape. A spring groove 14 is provided at one end of the base 11 close to the valve plate 3. The cross-section of the spring groove 14 is circular. The return spring 13 is arranged in the spring groove 14. The inner end of the return spring 13 abuts against the inner end of the spring groove 14. A plurality of guide rods 15 corresponding to the elastic component 6 are distributed in a circular array on the pressure ring 12. The outer diameter of the guide rod 15 is equivalent to the inner diameter of the spring groove 14. The guide rod 15 extends into the corresponding spring groove 14 and abuts against the return spring 13. The end of the pressure ring 12 away from the guide rod 15 abuts against the valve seat 4. The return spring 13 applies spring force to the guide rod 15, so that the pressure ring 12 is subjected to a force in the direction of the valve seat 4, and then the pressure ring 12 pushes the valve seat 4 to slide in the mounting groove 7, so that when the valve is closed, it fits tightly with the sealing surface of the valve plate 3 to prevent leakage.

[0028] As attached Figure 2 As shown, the mounting ring 5 is provided with a plurality of screw holes 16, the number of which is equal to that of the base 11, and the base 11 is threadedly connected to the corresponding screw holes 16, that is, the outer periphery of the base 11 has external threads that match the screw holes 16. The mounting structure of this design is simple and reliable, and is very convenient to disassemble and assemble. Moreover, the spring preload force can be adjusted by adjusting the axial position of the base 11.

[0029] As attached Figure 2 As shown, the end of the base 11 away from the valve plate 3 is provided with a hexagonal groove 17. The hexagonal groove 17 can be used for tools to be inserted and rotate the base 11, which is more conducive to its disassembly and assembly operation.

[0030] As attached Figure 2 As shown, the elastic component 6 also includes a locking nut 18, which is threadedly connected to the corresponding screw hole 16, and the locking nut 18 is tightly pressed against one end of the base 11 provided with the inner hexagonal groove 17, and the locking nut 18 is provided with an inner hexagonal hole 19, and the area of ​​the inner hexagonal hole 19 is larger than the area of ​​the inner hexagonal groove 17. When the locking nut 18 is pressed against the base 11, the thread friction between the base 11 and the screw hole 16 can be increased, thereby increasing the firmness of the installation of the base 11. In addition, since the area of ​​the inner hexagonal hole 19 is larger than the area of ​​the inner hexagonal groove 17, the locking nut 18 can be loosened first, then the base 11 is adjusted, and finally the locking nut 18 is tightened.

[0031] As attached Figure 2 As shown, a pressure relief hole 20 is provided in the base 11 to connect the spring slot 14 and the inner hexagonal slot 17. The provision of the pressure relief hole 20 can ensure that the guide rod 15 can slide smoothly in the spring slot 14.

[0032] As attached Figure 2 As shown, a plurality of positioning grooves 21 are provided on the inner end surface of the positioning groove 9, a connecting block 22 is inserted into the positioning groove 21, and the connecting block 22 is welded to the positioning groove 21, and a thread groove 23 for screwing the positioning screw 10 is provided on the connecting block 22. The valve body 1 can be directly cast, the thread groove 23 is provided on the connecting block 22, and then the connecting block 22 is welded to the valve body 1, which is more convenient for processing.

[0033] As attached Figure 2 As shown, the outer end of the mounting ring 5 is provided with a recessed portion 24 for embedding the nut of the positioning screw 10. This design can prevent the nut of the positioning screw 10 from protruding from the end surface of the mounting ring 5, making it easier to install the valve.

[0034] As attached Figure 2 As shown, the outer periphery of the valve seat 4 is provided with a sealing ring 25 for forming a sealing match with the inner wall of the mounting groove 7. This design can ensure the sealing performance between the outer periphery of the valve seat 4 and the inner wall of the mounting groove 7, and prevent the medium from leaking from the gap between the two.

Claims

1. A two-way pressure-rotating ball valve, comprising a valve body (1), a valve stem (2), a valve plate (3) and a valve seat (4), wherein the valve stem (2) passes through the upper part of the valve body (1) and extends into the interior of the valve body (1) to be linked with the valve plate (3), and the valve seat (4) is installed in the valve body (1) to cooperate with the valve plate (3) in a sealing manner when the valve is closed; characterized in that: It also includes a mounting ring (5) and a plurality of elastic components (6). A mounting groove (7) is provided on the inner wall of the valve body (1) along the flow direction of the medium. The valve seat (4) is slidably arranged in the mounting groove (7), and a floating gap (8) is provided between the inner end of the mounting groove (7) and the inner end of the valve seat (4). A positioning groove (9) is provided in the valve body (1) at a position corresponding to the outer end of the mounting groove (7). The mounting ring (5) is installed in the positioning groove (9) by means of a plurality of positioning screws (10). The plurality of elastic components (6) are distributed in a circular array on the mounting ring (5), and the inner ends of the plurality of elastic components (6) are tightly pressed against the outer end surface of the valve seat (4).

2. A two-way pressure-spin ball valve according to claim 1, characterized in that: The elastic component (6) comprises a base (11), a pressure ring (12) and a return spring (13); the base (11) is mounted on the mounting ring (5); a spring groove (14) is provided at one end of the base (11) close to the valve plate (3); the return spring (13) is arranged in the spring groove (14); a plurality of guide rods (15) whose number is equivalent to that of the elastic component (6) are distributed in a circular array on the pressure ring (12); the guide rods (15) extend into corresponding spring grooves (14) and are pressed against the return spring (13); and the end of the pressure ring (12) away from the guide rods (15) is pressed against the valve seat (4).

3. A two-way pressure-spin ball valve according to claim 2, characterized in that: The mounting ring (5) is provided with a plurality of screw holes (16) whose number is equal to that of the base (11), and the base (11) is threadedly connected to the corresponding screw holes (16).

4. A two-way pressure-spin ball valve according to claim 3, characterized in that: An end of the base (11) away from the valve plate (3) is provided with a hexagonal socket (17).

5. A two-way pressure-spin ball valve according to claim 4, characterized in that: The elastic component (6) also includes a locking nut (18), the locking nut (18) is threadedly connected to the corresponding screw hole (16), and the locking nut (18) is tightly abutted against one end of the base (11) provided with a hexagonal inner groove (17), and the locking nut (18) is provided with a hexagonal inner hole (19) through it, and the area of ​​the hexagonal inner hole (19) is larger than the area of ​​the hexagonal inner groove (17).

6. A two-way pressure-spin ball valve according to claim 4, characterized in that: The base (11) is provided with a pressure relief hole (20) communicating with the spring groove (14) and the hexagonal inner groove (17).

7. A two-way pressure-spin ball valve according to claim 1, characterized in that: A plurality of positioning grooves (21) are provided on the inner end surface of the positioning groove (9), a connecting block (22) is inserted into the positioning groove (21), and the connecting block (22) is welded to the positioning groove (21), and a thread groove (23) for screwing the positioning screw (10) is provided on the connecting block (22).

8. A two-way pressure-spin ball valve according to claim 7, characterized in that: The outer end of the installation ring (5) is provided with a recessed portion (24) for inserting the nut of the positioning screw (10).

9. A two-way pressure-spin ball valve according to claim 1, characterized in that: A sealing ring (25) is installed on the outer periphery of the valve seat (4) for forming a sealing fit with the inner wall of the installation groove (7).

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