Valve packing pre-tightening structure and valve

Abstract

The utility model discloses a valve filler pre-tightening structure and a valve, and relates to the technical field of valves. The valve comprises a valve seat, the two ends of the valve seat are communicated with connecting pipes, a valve cover is installed on the outer wall of the valve seat, a valve rod is connected to the top of the valve cover in a penetrating and rotating mode, a rotating handle is fixedly arranged on the outer wall of the valve rod in a sleeved mode, and the bottom end of the valve rod penetrates through the outer wall of the valve seat and extends into the valve seat. A valve ball is fixedly connected to the bottom end of the valve rod, the inner wall of the valve seat is attached to the outer wall of the valve ball in a sealed mode, and a plurality of springs are arranged on the inner wall of the top of the valve deck in an annular array mode. The pressing plate is pressed down through the elastic force of the springs to press the valve packing so as to prevent the valve packing from loosening, and the first limiting disc and the second limiting disc can fix the valve packing in the middle to fix the valve packing again. The two arc-shaped clamping plates can be driven to be close to each other to be attached to the outer wall of the valve rod by rotating the driving screw to slow down the rotating speed of the valve rod for finer adjustment.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, in particular to a valve packing pre-tightening structure and a valve. Background Art

[0002] Valves are control components in fluid delivery systems with functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. The valve is composed of valve packing, also known as valve seat packing or sealing packing, which is a material used to fill the space around the rotating shaft or sliding part of the valve. Its main function is to enhance the sealing performance of the valve and prevent medium leakage. Valve packing is usually located at the contact point between the valve stem and the valve body, playing the role of isolation and sealing.

[0003] The valves in the prior art adopt a relatively loose design, which will cause the valve packing to be relatively loose when placed in the valve. The loosened packing will reduce the sealing performance of the valve, causing leakage and shortening the service life. To this end, we provide a valve packing pre-tightening structure and a valve to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a valve packing pre-tightening structure and a valve, which solves the problem of leakage in the prior art due to the loose design of the valve through the cooperation of a spring and a pressure plate.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model discloses a valve packing pre-tightening structure and a valve, comprising a valve seat, both ends of the valve seat are connected with connecting pipes, a valve cover is installed on the outer wall of the valve seat, the top of the valve cover is penetrated and rotatably connected to a valve stem, a rotating handle is fixedly sleeved on the outer wall of the valve stem, the bottom end of the valve stem penetrates the outer wall of the valve seat and extends into the valve seat, the bottom end of the valve stem is fixedly connected to a valve ball, the inner wall of the valve seat and the outer wall of the valve ball are sealingly fitted, a plurality of springs are provided in an annular array on the inner wall of the top of the valve cover, the bottom ends of the plurality of springs are fixedly connected to the same pressure plate, the outer wall of the valve stem is sleeved with valve packing, and the top of the valve packing and the bottom of the pressure plate are in close contact with each other.

[0007] The utility model is further configured such that a first limiting plate and a second limiting plate are fixedly sleeved on the outer wall of the valve stem, and the top and bottom of the valve packing are respectively fitted with the bottom of the first limiting plate and the top of the second limiting plate.

[0008] The utility model is further configured such that the top of the valve cover is slidably connected to two arc-shaped clamping plates, one side of the two arc-shaped clamping plates is threadedly connected to the same driving screw, the top of the valve cover is fixedly connected to a rectangular plate, one side of the rectangular plate is rotatably connected to one end of the driving screw.

[0009] The utility model is further configured such that the inner walls of the two arc-shaped clamping plates are in contact with the outer wall of the valve stem, and anti-slip grooves are provided on the inner walls of the two arc-shaped clamping plates.

[0010] The utility model is further configured such that a mounting groove is provided on the outer wall of the valve seat, the valve cover has a mounting groove sealing cover disposed therein, the valve packing is located in the mounting groove, and the bottom of the valve cover fits the top of the valve packing.

[0011] The utility model is further configured such that a valve cavity is opened in the valve seat, the valve ball is located in the valve cavity, two sealing sleeves are fixedly connected to the outer wall of the valve ball, and the outer wall of the sealing sleeve is tightly fitted with the inner wall of the valve cavity.

[0012] The utility model is further configured such that a collar is sleeved on the outer wall of the valve stem, and the collar passes through and is fixedly connected to the top of the valve cover.

[0013] The utility model is further configured such that a sealing ring is inserted and sealed through one end of the two connecting pipes away from each other, and the inner walls of the two connecting pipes are both threaded walls.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model is connected to other pipelines through the threaded wall thread. The sealing sleeve can be attached to the inner wall of the valve cavity in the valve seat to seal, which increases the sealing performance of the valve ball. The first limit plate and the second limit plate can clamp the valve packing in the middle to fix it. Multiple springs will always drive the pressure plate to descend through elastic force. The pressure plate will tightly adhere to the top of the valve packing to prevent the valve packing from loosening. At this time, the bottom of the valve packing will tightly adhere to the top of the second limit plate to press it. A ring is provided on the valve stem to reduce friction when rotating to reduce the wear of the valve stem.

[0016] 2. The utility model uses the elastic force of multiple springs to press the pressure plate to tighten the valve packing to prevent the valve packing from loosening. The first limit plate and the second limit plate can fix the valve packing in the middle to fix the valve packing again. Rotating the drive screw can drive the two arc-shaped clamping plates to approach each other and stick to the outer wall of the valve stem to slow down the valve stem rotation speed for more precise adjustment.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0019] Figure 1 It is a three-dimensional schematic diagram of a valve packing pre-tightening structure and a valve;

[0020] Figure 2 It is a first exploded three-dimensional schematic diagram of a valve packing pre-tightening structure and a valve;

[0021] Figure 3 A second exploded three-dimensional schematic diagram of a valve packing pre-tightening structure and a valve;

[0022] Figure 4 It is a partial cross-sectional diagram of a valve packing pre-tightening structure and a valve;

[0023] Figure 5 It is a three-dimensional schematic diagram of a valve packing pre-tightening structure and a valve cover in a valve;

[0024] Figure 6 The present invention is a cross-sectional schematic diagram of a valve packing pre-tightening structure and a valve seat in a valve.

[0025] In the accompanying drawings: 1. Valve seat; 2. Connecting pipe; 3. Threaded wall; 4. Valve cover; 5. Arc-shaped clamping plate; 6. Turning handle; 7. Sealing ring; 8. Drive screw; 9. Rectangular plate; 10. Valve stem; 11. Ring; 12. First limit plate; 13. Second limit plate; 14. Spring; 15. Pressure plate; 16. Valve packing; 17. Sealing sleeve; 18. Valve ball; 19. Mounting groove; 20. Valve cavity. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] For specific embodiment 1, please refer to Figures 1-6The utility model is a valve packing pre-tightening structure and a valve, a valve seat 1, both ends of the valve seat 1 are connected with a connecting pipe 2, a valve cover 4 is installed on the outer wall of the valve seat 1, the top of the valve cover 4 is rotatably connected to the valve stem 10, the outer wall of the valve stem 10 is fixedly sleeved with a turning handle 6, the bottom end of the valve stem 10 passes through the outer wall of the valve seat 1 and extends into the valve seat 1, the bottom end of the valve stem 10 is fixedly connected to the valve ball 18, the inner wall of the valve seat 1 and the outer wall of the valve ball 18 are sealed together, a plurality of springs 14 are provided in an annular array on the inner wall of the top of the valve cover 4, and the bottom ends of the plurality of springs 14 are fixedly connected to the same pressure plate 15, The outer wall of the valve stem 10 is sleeved with a valve packing 16, and the top of the valve packing 16 is tightly in contact with the bottom of the pressure plate 15. The outer wall of the valve stem 10 is fixedly sleeved with a first limit plate 12 and a second limit plate 13. The top and bottom of the valve packing 16 are respectively fitted with the bottom of the first limit plate 12 and the top of the second limit plate 13. The top of the valve cover 4 is slidingly connected to two arc-shaped splints 5, and one side of the two arc-shaped splints 5 is threadedly connected to the same drive screw 8. The top of the valve cover 4 is fixedly connected to a rectangular plate 9, and one side of the rectangular plate 9 is rotatably connected to one end of the drive screw 8.

[0028] Specifically: rotate the handle 6 to drive the valve stem 10 and the valve ball 18 to rotate simultaneously to control the circulation of the liquid in the valve seat 1. The sealing ring 7 can be fitted on the connection between the connecting pipe 2 and other pipelines for sealing. The threaded wall 3 is used to threadedly connect other pipelines. The sealing sleeve 17 can be attached to the inner wall of the valve cavity 20 in the valve seat 1 to seal, thereby increasing the sealing performance of the valve ball 18. The first limit plate 12 and the second limit plate 13 can clamp the valve packing 16 in the middle for fixing. Multiple springs 14 will always drive the pressure plate 15 to descend through elastic force. The pressure plate 15 will tightly adhere to the top of the valve packing 16 to press and prevent the valve packing 16 from loosening.

[0029] For specific embodiment 2, please refer to Figures 1-6 On the basis of the specific embodiment 1, the inner walls of the two arc-shaped splints 5 are fitted with the outer wall of the valve stem 10, and the inner walls of the two arc-shaped splints 5 are provided with anti-slip grooves. A mounting groove 19 is provided on the outer wall of the valve seat 1, and the valve cover 4 sets a sealing cover for the mounting groove 19 inside. The valve packing 16 is located in the mounting groove 19, and the bottom of the valve cover 4 and the top of the valve packing 16 are fitted together. A valve cavity 20 is provided in the valve seat 1, and the valve ball 18 is located in the valve cavity 20. Two sealing sleeves 17 are fixedly connected to the outer wall of the valve ball 18, and the outer wall of the sealing sleeve 17 is tightly fitted with the inner wall of the valve cavity 20. A collar 11 is sleeved on the outer wall of the valve stem 10, and the collar 11 is fixedly connected to the top of the valve cover 4. The ends of the two connecting pipes 2 away from each other are sealed and penetrated with a sealing ring 7, and the inner walls of the two connecting pipes 2 are both threaded walls 3.

[0030] Specifically: A collar 11 is provided on the valve stem 10 to reduce friction during rotation to reduce the wear of the valve stem 10. Rotating the drive screw 8 can drive the two arc-shaped splints 5 to approach each other and stick to the outer wall of the valve stem 10. Anti-slip grooves are provided on the inner wall of the arc-shaped splint 5, which contact the outer wall of the valve stem 10 to increase friction and slow down the rotation speed of the valve stem 10. The first limit plate 12 and the second limit plate 13 can fix the valve packing 16 in the middle to fix the valve packing 16 again. Rotating the drive screw 8 can drive the two arc-shaped splints 5 to approach each other and stick to the outer wall of the valve stem 10 to slow down the rotation speed of the valve stem 10 for more precise adjustment.

[0031] The working principle of the present utility model is as follows: the turning handle 6 is rotated to drive the valve stem 10 and the valve ball 18 to rotate simultaneously to control the circulation of the liquid in the valve seat 1; the sealing ring 7 can be fitted on the connection between the connecting pipe 2 and other pipelines for sealing; the threaded wall 3 is used for threaded connection to other pipelines; the sealing sleeve 17 can be fitted on the inner wall of the valve cavity 20 in the valve seat 1 for sealing, thereby increasing the sealing performance of the valve ball 18; the first limiting plate 12 and the second limiting plate 13 can clamp the valve packing 16 in the middle for fixing.

[0032] Multiple springs 14 will always drive the pressure plate 15 to descend through elastic force, and the pressure plate 15 will be tightly attached to the top of the valve packing 16 for compression. At this time, the bottom of the valve packing 16 will be tightly attached to the top of the second limit plate 13 for compression. A collar 11 is provided on the valve stem 10 to reduce friction during rotation to reduce the wear of the valve stem 10. Rotating the drive screw 8 can drive the two arc-shaped splints 5 to approach each other and adhere to the outer wall of the valve stem 10. Anti-slip grooves are provided on the inner wall of the arc-shaped splint 5, which contacts the outer wall of the valve stem 10 to increase friction and slow down the rotation speed of the valve stem 10, thereby controlling the valve ball 18 to rotate more finely to adjust the flow in the valve seat 1.

[0033] The standard parts used in the present invention can all be purchased from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. The control method is automatically controlled by a control unit. The control circuit of the control unit can be implemented by simple programming by technicians in this field, which is common knowledge in this field. Therefore, the control method and circuit connection are no longer explained in detail in the present invention.

[0034] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to only the specific implementation methods described. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can better understand and utilize the present invention.

Claims

1. A valve packing pre-tightening structure and a valve, comprising a valve seat (1), characterized in that: Both ends of the valve seat (1) are connected to a connecting pipe (2), a valve cover (4) is installed on the outer wall of the valve seat (1), the top of the valve cover (4) is rotatably connected to a valve stem (10), a rotating handle (6) is fixedly sleeved on the outer wall of the valve stem (10), the bottom end of the valve stem (10) passes through the outer wall of the valve seat (1) and extends into the valve seat (1), the bottom end of the valve stem (10) is fixedly connected to a valve ball (18), and the inner wall of the valve seat (1) and the outer wall of the valve ball (18) are sealed and fitted; A plurality of springs (14) are provided in an annular array on the inner wall of the top of the valve cover (4), and the bottom ends of the plurality of springs (14) are fixedly connected to the same pressure plate (15). A valve packing (16) is sleeved on the outer wall of the valve stem (10), and the top of the valve packing (16) and the bottom of the pressure plate (15) are in close contact with each other.

2. A valve packing pre-tightening structure and valve according to claim 1, characterized in that: A first limiting plate (12) and a second limiting plate (13) are fixedly sleeved on the outer wall of the valve stem (10), and the top and bottom of the valve packing (16) are respectively fitted with the bottom of the first limiting plate (12) and the top of the second limiting plate (13).

3. The valve packing pre-tightening structure and valve according to claim 1, characterized in that: The top of the valve cover (4) is slidably connected to two arc-shaped clamping plates (5), one side of the two arc-shaped clamping plates (5) is threadedly connected to the same driving screw (8), and the top of the valve cover (4) is fixedly connected to a rectangular plate (9), one side of the rectangular plate (9) is rotatably connected to one end of the driving screw (8).

4. A valve packing pre-tightening structure and valve according to claim 3, characterized in that: The inner walls of the two arc-shaped clamping plates (5) are in contact with the outer wall of the valve stem (10), and anti-slip grooves are provided on the inner walls of the two arc-shaped clamping plates (5).

5. The valve packing pre-tightening structure and valve according to claim 1, characterized in that: An installation groove (19) is provided on the outer wall of the valve seat (1), a sealing cover of the installation groove (19) is arranged inside the valve cover (4), the valve packing (16) is located in the installation groove (19), and the bottom of the valve cover (4) and the top of the valve packing (16) are in contact with each other.

6. The valve packing pre-tightening structure and valve according to claim 1, characterized in that: A valve cavity (20) is defined in the valve seat (1), and the valve ball (18) is located in the valve cavity (20). Two sealing sleeves (17) are fixedly connected to the outer wall of the valve ball (18), and the outer wall of the sealing sleeve (17) is tightly fitted to the inner wall of the valve cavity (20).

7. The valve packing pre-tightening structure and valve according to claim 1, characterized in that: A collar (11) is sleeved on the outer wall of the valve stem (10), and the collar (11) passes through and is fixedly connected to the top of the valve cover (4).

8. The valve packing pre-tightening structure and valve according to claim 1, characterized in that: The ends of the two connecting pipes (2) that are away from each other are both sealed and penetrated by a sealing ring (7), and the inner walls of the two connecting pipes (2) are both threaded walls (3).

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