A valve packing gland bolt anti-break protector

Abstract

The embodiment of the present invention discloses a valve packing gland bolt anti-break protector, comprising a fixing part for fixed installation on the valve packing, on which a parallel telescopic device for squeezing the gland of the valve packing to displace it is installed through a bracket; the parallel telescopic device comprises a threaded barrel fixedly installed on the bracket, in which a resistance body for squeezing the gland of the valve packing is installed through a linear slide rail, and a movable screw disk is installed on the surface of the threaded barrel through thread engagement and rotation, and the movable screw disk is installed with a driving lever through a one-way driving mechanism. The present invention uses the lever principle to make the driving lever rotate the movable screw disk, thereby achieving the purpose of labor saving, and the movable screw disk undergoes longitudinal displacement under the action of the thread, and when the displacement occurs, the resistance body is squeezed so that the resistance body presses it down from the center of the gland.

Description

Technical Field

[0001] The embodiment of the present invention relates to the technical field of fastening tools, and in particular to a valve packing gland bolt anti-break protector. Background Art

[0002] Packing, also known as sealing filler, is usually woven from softer threads, usually with square, rectangular or round cross-sectional areas, and filled in a sealed cavity. Valve packing is the seal of the valve, which is generally tightened by bolts and nuts. When a high-temperature and high-pressure valve packing leaks in industrial production, it is necessary to tighten the packing gland nut while maintaining the high temperature and high pressure in the pipeline system, and tighten the pressure plate through the nut. Since there are multiple nuts evenly arranged circumferentially on the pressure plate, the staff can only operate one nut at a time. When the staff only tightens the nut on one side, the pressure plate will shift to one side. This shift will cause squeezing between the various components, resulting in rupture or damage to the various components, seriously endangering personal safety.

[0003] Operators generally use wire to temporarily tie the gland, which has poor safety, stability, and reliability, and is inconvenient for maintenance work. For high-temperature and high-pressure valves, the strength of the wire is insufficient, and the safety risk is high. In the prior art, an extrusion screw can be used to pre-press the gland to the target position, but the center of the gland is occupied by the limit rod, and the extrusion screw cannot squeeze the center of the gland, which will also cause the gland to deflect, and the extrusion screw is laborious to rotate, which is not conducive to the operation of the staff. Summary of the invention

[0004] To this end, an embodiment of the present invention provides a valve packing gland bolt anti-break protector to solve the problem in the prior art that the extrusion screw cannot squeeze the center of the gland, still causing its deflection and difficulty in screw rotation due to the use of an extrusion screw.

[0005] In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

[0006] A valve packing gland bolt breakage preventer comprises a fixing piece for fixing on the valve packing, on which a parallel telescopic device for squeezing the gland of the valve packing to displace it is installed through a bracket;

[0007] The parallel telescopic device includes a threaded barrel fixedly mounted on the bracket, a resisting body of a gland for squeezing the valve packing is installed in the threaded barrel via a linear slide rail, a movable screw disk is installed on the surface of the threaded barrel via thread engagement and rotation, and a driving lever is installed on the movable screw disk via a one-way driving mechanism.

[0008] Furthermore, the one-way driving mechanism comprises a driving ring sleeved on the movable screw disk, the driving lever is fixedly connected to the driving ring, and a driving groove is provided on the inner wall of the driving ring;

[0009] A linkage tooth meshing with the driving groove is arranged on the circumference of the surface of the movable screw disk, and the middle part of one end of the linkage tooth is connected to the movable screw disk through a hinge point.

[0010] Furthermore, a receiving groove for receiving the linkage tooth is provided at a position of the movable screw disk opposite to the hinge point.

[0011] Furthermore, the bottom of the receiving groove is connected to the linkage tooth through a return spring.

[0012] Furthermore, there is a gap between the driving ring and the movable screw disk.

[0013] The embodiments of the present invention have the following advantages:

[0014] The present invention uses the lever principle to make the driving lever rotate the movable screw disk, thereby achieving the purpose of labor saving. The movable screw disk is longitudinally displaced under the action of the thread. When the displacement occurs, the abutment body is squeezed so that the abutment body presses it down from the center of the gland, so that the gland is pre-tightened before the nut is tightened. At this time, tightening the nut on the gland will not cause the gland to deflect, so as to avoid the gland, the screw rod and the nut thereon from being damaged and broken due to extrusion caused by deflection. Through the one-way driving mechanism, the driving lever can drive the movable screw disk to rotate when it rotates counterclockwise, and the position of the movable screw disk remains unchanged when the driving lever rotates clockwise, so that the driving lever can rotate the movable screw disk in one direction by reversing and resetting between the two screw rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the one-way driving mechanism in an embodiment of the present invention.

[0019] In the figure:

[0020] 1-fixing part; 2-bracket; 3-parallel telescopic device; 4-valve; 5-pressure cover; 6-limit rod; 7-valve packing;

[0021] 31-threaded cylinder; 32-linear slide rail; 33-movable screw disk; 34-one-way driving mechanism; 35-driving lever; 36-contact body;

[0022] 341 - driving ring; 342 - driving groove; 343 - linkage tooth; 344 - hinge point; 345 - storage groove; 346 - return spring. DETAILED DESCRIPTION

[0023] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0024] like Figure 1 and Figure 2As shown, the present invention provides a valve packing gland bolt anti-break protector, comprising a fixing member 1 for fixedly mounted on the valve packing, on which a parallel telescopic device 3 for squeezing the gland of the valve packing to displace it is installed through a bracket 2; the parallel telescopic device 3 comprises a threaded barrel 31 fixedly mounted on the bracket 2, in which a resisting body 36 for squeezing the gland of the valve packing is installed through a linear slide rail 32, a movable screw disc 33 is installed on the surface of the threaded barrel 31 through threaded engagement and rotation, and the movable screw disc 33 is installed with a driving lever 35 through a one-way driving mechanism 34. The one-way driving mechanism 34 includes a driving ring 341 sleeved on the moving screw disk 33, the driving lever 35 is fixedly connected to the driving ring 341, and a driving groove 342 is provided on the inner wall of the driving ring 341; a linkage tooth 343 meshing with the driving groove 342 is arranged circumferentially on the surface of the moving screw disk 33, and the middle part of one end of the linkage tooth 343 is connected to the moving screw disk 33 through a hinge point 344. A receiving groove 345 for receiving the linkage tooth 343 is provided at a position on the side of the moving screw disk 33 opposite to the hinge point 344. The bottom of the receiving groove 345 is connected to the linkage tooth 343 through a reset spring 346. There is a gap between the driving ring 341 and the moving screw disk 33.

[0025] The core idea of ​​the present invention is to use the lever principle to make the driving lever 35 rotate the movable screw disk 33, so that the movable screw disk 33 is longitudinally displaced under the action of the thread. When the displacement occurs, the abutment 36 is squeezed so that the abutment 36 presses down the gland 5 from the center thereof, so that the gland 5 is pre-tightened before the nut is tightened. At this time, tightening the nut on the gland 5 will not cause the gland 5 to deflect, thereby avoiding damage and rupture of the gland 5, and the screw and nut thereon due to extrusion caused by deflection.

[0026] In this embodiment, a through hole is generally provided at the center of the gland 5, and a limit rod 6 is fixedly installed at the center of the valve 4. The gland 5 and the valve packing 7 can be longitudinally slidably mounted thereon, wherein the fixing member 1 and the threaded cylinder 31 are both spliced ​​structures, and can be directly fixedly mounted on the limit rod 6 from the outside, wherein the bottom of the abutment 36 is evenly distributed on the edge of the limit rod 6, thereby ensuring that the abutment 36 squeezes the gland 5, so that it moves parallel to its original position to avoid deflection.

[0027] The present invention saves effort by driving the lever 35 and utilizes the hinge point 344 to movably install the linkage tooth 343, so that when the driving lever 35 drives the driving ring 341 to rotate clockwise, the driving groove 342 and the inner wall of the driving ring 341 squeeze the outer side of the linkage tooth 343, so that the linkage tooth 343 deflects toward the receiving groove 345. The linkage tooth 343 deflected toward the receiving groove 345 cannot drive the movable screw disk 33 to rotate at this time. When the driving ring 341 rotates counterclockwise, the linkage tooth 343 cannot deflect in the counterclockwise direction. Therefore, the driving groove 342 drives the linkage tooth 343 to rotate counterclockwise, and the linkage tooth 343 drives the movable screw disk 33 to rotate and move it downward.

[0028] The above scheme can solve the problem of the screw on the pressure cover 5 blocking the rotation of the driving lever 35. Since adjusting the movable screw disk 33 requires a large number of rotations, and the higher screw will block the driving lever 35 from rotating into a circle, the above scheme is used so that when the driving lever 35 rotates counterclockwise, the movable screw disk 33 can be driven to rotate, and when the driving lever 35 rotates clockwise, the position of the movable screw disk 33 remains unchanged, so that the driving lever 35 can rotate the movable screw disk 33 unidirectionally by reversing and resetting between the two screws.

[0029] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A valve packing gland bolt anti-break protector, characterized in that: It comprises a fixing member (1) for fixing on a valve packing, wherein a parallel telescopic device (3) for squeezing a gland of the valve packing to move the gland of the valve packing is installed on the fixing member (1) via a bracket (2); The parallel telescopic device (3) comprises a threaded barrel (31) fixedly mounted on the bracket (2), a resisting body (36) for squeezing a gland of the valve packing being mounted in the threaded barrel (31) via a linear slide rail (32), a movable screw disc (33) being rotatably mounted on the surface of the threaded barrel (31) via a threaded engagement, and a driving lever (35) being mounted on the movable screw disc (33) via a one-way driving mechanism (34); The one-way driving mechanism (34) comprises a driving ring (341) sleeved on the movable screw disk (33); the driving lever (35) is fixedly connected to the driving ring (341); and a driving groove (342) is provided on the inner wall of the driving ring (341); A linkage tooth (343) meshing with the driving groove (342) is provided on the circumference of the surface of the movable screw disk (33); the middle portion of one end of the linkage tooth (343) is connected to the movable screw disk (33) via a hinge point (344); A through hole is provided at the center of the gland (5), and a limit rod (6) is fixedly mounted at the center of the valve (4). The gland (5) and the valve packing (7) can be longitudinally slidably sleeved on the limit rod (6); wherein the fixing member (1) and the threaded cylinder (31) are both spliced ​​structures and can be directly fixedly sleeved on the limit rod (6) from the outside, so that the bottom of the abutment body (36) is evenly distributed on the edge of the limit rod (6).

2. A valve packing gland bolt anti-break protector according to claim 1, characterized in that: A receiving groove (345) for receiving the linkage tooth (343) is provided at a position on a side of the movable screw disk (33) directly opposite to the hinge point (344).

3. A valve packing gland bolt anti-break protector according to claim 2, characterized in that: The bottom of the receiving groove (345) is connected to the linkage tooth (343) via a return spring (346).

4. A valve packing gland bolt anti-break protector according to claim 2, characterized in that: There is a gap between the driving ring (341) and the moving screw disk (33).

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