JP2840202B2 - Mounting method and packing jig for plunger packing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a packing used in a seal portion of a plunger in a plunger type pump or compressor for pumping a high-pressure fluid, and to an assembling jig.

[0002]

2. Description of the Related Art Generally, in a plunger type pump which pressurizes and pumps a liquid to a high pressure or a plunger type compressor which pressurizes and pumps a gas to a high pressure, the plunger is reciprocated by a driving device provided outside a cylinder. A seal portion shown in FIG. 6 is provided at a portion where the plunger passes through the cylinder. The plunger type pump or the plunger type compressor has a vertical type and a horizontal type, but unless otherwise indicated in the following description, it relates to matters common to both. In FIG. 6, reference numeral 1 denotes a cylinder of a plunger type pump or a plunger type compressor. A plunger 2 is inserted through a through hole 1a of the cylinder 1 so as to be able to reciprocate. Outside the through hole 1a of the cylinder 1, a high-pressure fluid that leaks to the outside through the gap A between the through hole 1a and the plunger 2 from inside the cylinder 1 while reciprocating the plunger 2. A packing structure 3 for preventing leakage of the gas is inserted through the plunger 2 so as to be able to reciprocate. That is, the plunger 2 linearly penetrates the through hole 1 a and the packing structure 3 from the inside of the cylinder 1 and protrudes outside the cylinder 1. The packing structure 3 includes a hollow disk-shaped packing (three-piece packing) 4 having circular inner holes 4 a, 5 a, 6 a, and 7 a for penetrating the plunger 2 in the axial direction, and a seal ring 5. , The seal support ring 6 and the packing case 7 as one set, and a plurality of sets (five sets in FIG. 6) are provided so as to be stacked in the axial direction of the plunger 2. As shown in FIGS. 7 and 8, the packing 4 is divided into three equal parts by an oblique straight cut surface 4c from the circular inner hole 4a to the outer periphery 4b. In the packing member 4d, a communication groove 4e communicating from the circular inner hole 4a to the outer periphery 4b is radially provided substantially in the center of one of the planes perpendicular to the axis, and the outer periphery 4b of the three packing members 4d is circled. To form an annular groove 4f,
An annular coil spring 4g is mounted in the annular groove 4f. That is, each packing member 4d is tightened in the direction of the circular inner hole 4a by the coil spring 4g.
Are mutually slid on the cut surface 4c to reduce the circular inner hole 4a as shown in FIG.
That is, in the case of the packing 4 alone, each packing member 4d
A sharp point 4h on the side of the inner hole 4a along the cut surface 4c protrudes into the inner hole 4a. The packing 4 is made of a material having a good sliding property with respect to the surface of the plunger 2. The seal ring 5 is for reducing the resistance when the packing 4 moves in the direction perpendicular to the axis along the cut surface 4c, and for maintaining the sealing performance of the contact surface. , For example, a synthetic resin material. The seal support ring 6 is a reinforcing member that supports the seal ring 5, and is made of a highly rigid material. The packing case 7 accommodates and holds the packing 4, the seal ring 5, and the seal support ring 6, and has an axial width equal to or greater than the thickness of the stack of the packing 4, the seal ring 5, and the seal support ring 6. A chamber B is formed concentrically with the circular inner hole 7a in the axial direction from one axial end face, and the packing 4, the seal ring 5, and the seal support ring 6 are housed in the chamber B. That is, the packing structure 3 is
A plurality of sets of the packing case 7 accommodating the packing 4, the seal ring 5, and the seal support ring 6 in order from the back side in the chamber B, and a plate-shaped member having the same circular inner hole 8a as the packing case 7. One holding plate 8 is provided so that the end surface of the packing case 7 on the side of the chamber B is opposite to the end surface of the next packing case 7 on the side opposite the chamber B, and the end surface of the last packing case 7 on the side of the chamber B is the holding plate 8.
The circular inner holes 7a and 8a are overlapped with each other through a ring-shaped sealing material 9 provided between the joining surfaces so as to surround the outer periphery of the chamber B. , 8a and the axis of the through hole 1a of the cylinder 1 are made straight, and the end face of the packing case 7 and the end face of the through hole 1a of the cylinder 1 which are opposite to the holding plate 8 are penetrated. A plurality of gaskets extending from the holding plate 8 to the end face of the cylinder 1 through the seal members 9 and 10 of the packing cases 7 through shaft seal members 10 provided around the holes 1a. Are fastened and fixed by the assembling bolts 11. The packing 4 is provided with the communication groove 4.
e is housed in the chamber B such that the plane provided with e is on the opposite side of the seal ring 5, that is, on the cylinder 1 side. The plunger 2 has a cylindrical shape, and the packing member 3 and the through hole 1a of the cylinder 1
And a connecting portion 2c formed through a tapered portion 2b which projects outside the packing structure 3 and a pressurizing portion 2a, ie, a large-diameter first cylindrical portion, which operates in the cylinder 1
That is, it is constituted by the second cylindrical portion having a small diameter. In the connecting portion 2c, a cylindrical notch portion 2d having a smaller diameter is formed in an intermediate portion. In the plunger 2 and the packing assembly 3 configured as described above, a reciprocating drive (not shown) is connected to the connection portion 2c, and the plunger 2 is pulled out from the state shown in FIG. Rarely reciprocated. Meanwhile, in the packing structure 3, the packing 4 applies the tightening force of the coil spring 4 g and the cylinder 1 to the outer peripheral surface of the pressurizing portion 2 a of the plunger 2 that slides back and forth.
The pressure applied to the outer periphery 4b of the fluid leaking through the through hole 1a makes the circular inner hole 4a tightly contact with the seal ring 5 and the seal support ring 6 to prevent the plunger 2 from leaking fluid in the reciprocating direction. The packing 4, the seal ring 5, and the seal support ring 6 divide the high-pressure fluid leakage in a stepwise manner. That is, packing 4
Is worn due to the circular inner hole 4a always sliding with the plunger 2, and the divided packing member 4d is
At the same time, the circular inner hole 4a maintains a circular shape while reducing the outer shape, and is always in close contact with the plunger 2. Therefore, when the wear amount of the packing 4 reaches the limit, it is necessary to replace the packing 4 with a new one. The operation of the plunger type pump or the plunger type compressor is stopped, the required part is disassembled, and the worn packing 4 is removed. New packing 4
Is assembled, and the disassembled part is assembled. At the time of disassembly, first, as shown in FIG. 6, the reciprocating drive device is separated from the connecting portion 2c while the plunger 2 is pushed.
In the case of the horizontal type, the assembling bolt 11 is then disassembled, and the holding plate 8 and the plurality of packing cases 7 are sequentially pulled from the outside toward the end of the connecting portion 2c of the plunger 2. In the case of the vertical type, next, the upper part of the cylinder 1 is disassembled, the plunger 2 is hung, the tip of the connecting portion 2c is pulled up until it is delivered into the cylinder 1 and pulled out from the packing structure 3, and then the holding plate 8 The assembly bolt 11 is disassembled with the lower side appropriately supported, and the packing structure 3 is disassembled. When assembling after disassembly, first, as shown in FIG.
Makes the plunger 2 protrude from the cylinder 1 by a length sufficient to penetrate the packing structure 3. In the case of the horizontal type, the packing case 7, the packing 4, the seal ring 5, and the seal support ring 6 are sequentially mounted in this order from the tip of the connection portion 2 c, and finally, the holding plate 8 is mounted, and then the packing structure is formed by the assembling bolts 11. The body 3 is mounted on the cylinder 1. In the case of the vertical type, the plunger 2 is suspended at the upper end of the cylinder 1, and then the packing case 7, the packing 4, the seal ring 5, and the seal support ring 6 are mounted in the same order as in the case of the horizontal type. While appropriately supporting the assembled parts from the lower side, they are sequentially mounted from the front end of the connecting portion 2c, and finally the holding plate 8 is mounted, and then the packing structure 3 is mounted on the cylinder 1 with the mounting bolts 11. Thereafter, the connecting portion 2c is connected to the reciprocating drive.

[0003]

Since the conventional packing mounting method is configured as described above, there are the following problems. That is, first, the packing is easily damaged when the packing is assembled. As shown in FIG. 8, the packing 4 has a state in which the sharp-pointed tip 4h of the circular inner hole 4a protrudes along the cut surface 4c of the packing member 4d before assembly, and resists the tightening force of the coil spring 4g. When the plunger 2 is mounted on the plunger 2 while being pushed and spread, the tip 4h may be damaged by hitting the tip 4h against the surface of the plunger 2. Secondly, the workability for assembling the packing is poor and difficult. Disassembly for assembling the packing, which is performed while the operation is temporarily stopped, to replace the packing worn out by the operation, is a minimum required disassembly and assembly operation. The packing replacement operation is performed by inserting a hand through a work hole of the frame. In the case of the horizontal type, each part of the packing structure is mounted on a plunger that protrudes horizontally, so that each part is supported by the plunger and can be easily disassembled and assembled. Attachment of the packing to the plunger is difficult work, and the packing is easily damaged. In the case of a vertical type, each part of the packing structure is mounted on a plunger vertically projecting downward from the cylinder, so that each part is not supported by the plunger, and each part is manually or using a tool. It is necessary to support, and it becomes very difficult work such as re-supporting each time one part is mounted, and mounting the packing in such a state is more difficult work than the horizontal type, The potential for damage is increased. In addition, if the plunger pump or plunger compressor is used in a dangerous atmosphere,
For example, if the product is used in a high temperature, dangerous or harmful or toxic atmosphere, the working time is limited to a short time, so it is necessary to change the packing quickly, which is a very difficult task. Becomes

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a packing installation method and a mounting jig which can be easily replaced in a short time without damaging the packing. Things.

[0005]

A method for assembling a packing for a plunger according to the present invention is a flat plate having a circular inner hole at a protruding portion of a plunger protruding from a cylinder of a plunger pump or a plunger compressor. The inner peripheral portion of the circular inner hole has a chamber concentrically cut from one end surface, and the chamber houses a circular flat plate-shaped packing, a seal ring, and a seal support ring each having a circular inner hole. A plurality of packing cases and a flat plate-shaped pressing plate having a circular inner hole, the pressing plate being the outermost, and the chamber-side end surface of the packing case being sequentially stacked with the pressing plate side as the pressing plate side,
In the packing structure, which is formed by dividing the packing into three parts and biasing the circular inner hole in a direction to reduce the circular inner hole, the plunger is passed through each of the circular inner holes with the holding plate side opposite to the cylinder. A method for assembling a plunger packing in which the packing structure is assembled to the cylinder, wherein an outer diameter is equal to a large-diameter pressurizing portion of the plunger, and an inner diameter is a small-diameter connection of the plunger. The center axis is a packing guide cylinder large enough to insert the part,
In advance, the circular inner holes are passed through the packing guide cylinder to assemble the packing structure including the unused packing, and then the plunger in a state where the packing structure is disassembled and removed is at a maximum. It is pulled into the cylinder until only the small-diameter connection portion projects, and then the packing assembly assembled to the packing guide cylinder is attached to the cylinder, and then the plunger is protruded from the cylinder. The configuration is as described above.

More specifically, after the packing structure assembled to the packing guide cylinder is assembled to the cylinder, the plunger is pressed until the large-diameter pressurizing portion abuts against the tip of the packing guide cylinder. With the plunger protruding, the packing guide tube is connected to the plunger, and then the plunger is protruded from the cylinder.

A plunger projecting from a cylinder of a plunger pump or a plunger compressor has a flat plate shape having a circular inner hole, and the inner peripheral portion of the circular inner hole is notched concentrically from one end face of the circular inner hole. In addition to having a chamber, the chamber has a circular flat plate-shaped packing having a circular inner hole, a plurality of packing cases in which a seal ring and a seal support ring are housed, and a flat plate-shaped holding plate having a circular inner hole. , The pressing plate being the outermost, the chamber side end face of the packing case is sequentially stacked with the pressing plate side, and the packing is divided into three parts and urged in a direction to reduce the circular inner hole. In the packing structure, the plunger is passed through each of the circular inner holes with the holding plate side opposite to the cylinder, The serial packing structure a built jig plunger packing assembled to the cylinder,
The overall shape is a cylindrical shape, the outer diameter of the cylindrical shape is the same as the large-diameter pressurizing portion of the plunger, and the inner diameter of the cylindrical shape is large enough to insert the small-diameter connecting portion of the plunger. The length of the cylindrical shape is at least the length from the outer end surface of the holding plate of the packing structure to the length of the packing member that exceeds the packing housed in the packing case at the end opposite to the holding plate. This is a configuration consisting of a packing guide cylinder.

[0008] More specifically, the packing guide cylinder includes:
A first connecting member for connecting the packing guide tube and the packing structure at the one end of the cylinder, and connecting the packing guide tube and the plunger inserted into the packing guide tube at the flange portion; This is a configuration in which a second connection member that connects the first and second parts is provided.

[0009]

In the method and the jig for assembling the packing for the plunger according to the present invention, the packing structure for previously containing unused packing is set around the packing guide cylinder whose outer diameter is equal to the pressing portion of the plunger. By assembling the body, it is possible to safely and reliably assemble the body in a posture that is easy to work and with sufficient time. Next, the packing structure assembled in the packing guide cylinder is used in a state where the used packing structure is disassembled and removed, and the plunger is retracted into the cylinder until only the long-diameter connection portion protrudes. By assembling the plunger into the cylinder, the small-diameter connection part of the plunger is inserted at the longest into the packing guide cylinder having an inner diameter capable of inserting the connection part of the plunger. Next, by projecting the plunger from the cylinder, the large-diameter pressurized portion of the plunger hits the tip of the packing guide cylinder, and the large-diameter pressurized portion of the plunger is extended by the packing guide cylinder, so that the packing guide cylinder is extended. Is pushed out, and the large-diameter pressurizing portion of the plunger is inserted into the packing structure instead of the packing guide cylinder. In the above operation, the force for tightening the packing guide tube by the force urged in the direction to reduce the circular inner hole of the packing is weak, and the packing guide tube is easily pushed out, and the large-diameter pressurizing portion of the plunger is pressed. Easy to insert. In the case of a horizontal pump or compressor, the plunger is arranged horizontally, so that the packing guide tube is supported by the connection portion of the inserted plunger, and the packing guide tube is pushed out of the packing structure as the plunger is protruded. . However, in the case of a vertical pump or compressor, the plunger is arranged vertically, so that the packing guide tube is vertical when the packing structure is assembled, and there is no support, and the plunger is inserted before the plunger is inserted. The packing guide tube comes off due to its own weight. Therefore, after assembling the packing assembly assembled to the packing guide cylinder to the cylinder, the packing guide cylinder is in a state where the plunger is protruded until the large-diameter pressurizing portion of the plunger abuts against the tip of the packing guide cylinder. By connecting the plunger to the plunger, the large-diameter pressurizing portion of the plunger is extended by the packing guide tube, and the packing guide tube does not fall off by its own weight alone, and by further projecting the plunger, A large-diameter pressurizing portion of the plunger is inserted into the packing structure instead of the packing guide tube. In the jig for assembling a packing for a plunger according to the present invention, the outer diameter of the packing guide cylinder is the same as the large-diameter pressurizing portion of the plunger, and the inner diameter is such that the small-diameter connecting portion of the plunger can be inserted. The cylindrical shape makes it possible to assemble the packing structure under the same conditions as the pressurizing part of the plunger with the packing guide cylinder as the central axis, and insert the connecting part of the plunger into the packing guide cylinder to guide the packing. By abutting the tip of the cylinder with the pressurizing portion of the plunger, the packing guide tube becomes an extension of the pressurizing portion of the plunger, and the pressurizing portion of the plunger is easily inserted into the packing structure. Since the length of the cylinder of the packing guide cylinder is shorter than the outer end surface of the holding plate of the packing structure and exceeds the packing stored in the packing case at the end opposite to the holding plate, a plurality of All the packings of the packing structure in which the packings are stacked and included are assembled in advance with the cylinder of the packing guide cylinder as the central axis. Furthermore, in the case of a vertical pump or compressor, a flange portion is provided at one end of the cylinder of the packing guide tube, and the first connecting member that connects the packing guide tube and the packing structure at the flange portion is provided. Thereby, the packing guide cylinder in which the cylinder is vertical when the packing structure is assembled to the cylinder is connected to the packing structure. In addition, by providing the second connecting member for connecting the packing guide tube and the connecting portion of the plunger inserted into the packing guide tube, when the first connecting member is removed and the plunger is protruded, the packing is provided. The guide cylinder projects integrally with the plunger.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method for assembling a packing for a plunger and an assembling jig according to the present invention will be described in detail with reference to the drawings. The same or the same parts as those in the conventional example will be described with the same reference numerals. FIG. 1 is a cross-sectional view showing the entire configuration of the assembled state of the plunger packing according to the present invention. In FIG. 1, reference numeral 1 denotes a cylinder of a plunger type pump or a plunger type compressor, and a plunger 2 is inserted through a through hole 1a of the cylinder 1 so as to be able to reciprocate. Outside the through hole 1a of the cylinder 1, a high-pressure fluid that leaks to the outside through the gap A between the through hole 1a and the plunger 2 from inside the cylinder 1 while reciprocating the plunger 2. Packing structure 3 for preventing leakage of
When assembled using the packing guide cylinder 12 of the mounting jig, a plurality of mounting bolts 1 are mounted on the opposing surface of the end surface of the cylinder 1 and the packing structure 3 via a ring-shaped sealing material 10.
1 is assembled.

The packing structure 3 includes a plurality of sets (five sets in FIG. 1) of a packing case 7 in which the packing 4, the seal ring 5, and the seal support ring 6 are inserted, and a holding plate 8. . As shown in FIG. 7, the packing 4 has a hollow disk-like shape in which a cylindrical inner hole 4a into which the pressurizing portion 2a of the plunger 2 can be inserted and a coil spring 4g for tightening is provided on the outer periphery. It is a three-part packing. The seal ring 5 and the seal support ring 6 are hollow disks formed with circular inner holes 5a and 6a into which the pressurizing portion 2a of the plunger 2 can be inserted.
The packing case 7 is provided with the pressing portion 2 of the plunger 2.
a flat plate having a thickness greater than or equal to the thickness of one packing 4, seal ring 5, and seal support ring 6 formed therein. A chamber B capable of accommodating and storing the packing 4, the seal ring 5, and the seal support ring 6 one by one concentrically is formed along 7a.
The holding plate 8 is a flat plate having a circular inner hole 8a into which the pressing portion 2a of the plunger 2 can be inserted. That is, the packing structure 3 includes a plurality of packing cases 7 in which the packing 4, the seal ring 5, and the seal support ring 6 are stacked and inserted in this order from the back side into the chamber B. The presser plate 8 is superimposed on the side where the chamber B is opened with the axial center coincident, and a ring-shaped sealing material 9 surrounding the chamber B is placed between the opposing surfaces of the packing case 7 and the presser plate 8. It is provided and configured.

The packing guide tube 12 has a cylindrical shape, and the outer diameter of the packing guide tube 12 is a portion of the plunger 2 which reciprocates the packing 4, ie, a large-diameter pressurizing portion 2a.
The inner diameter of the packing guide cylinder 12 is large enough to insert an end formed into a small diameter from the pressurizing portion 2a of the plunger 2 via the taper portion 2b, that is, the connecting portion 2c. The front end portion 12b of this inner diameter is formed in a tapered shape in accordance with the tapered portion 2b of the plunger 2, and the rear end portion 12c is formed to have substantially the same diameter as the connecting portion 2c of the plunger 2. The length is at least a length extending over the packing 4 at both ends of the packing structure 3, preferably opposite to the pressing plate (8) from the outer end face of the pressing plate (8) of the packing structure (3). It is formed to have a length extending beyond the packing (4) housed in the packing case (7) at the side end.

In the above configuration, when the plunger 2 protrudes from the cylinder 1, the connecting portion 2c and the tapered portion 2b are inserted into the packing guide tube 12, and the tapered portion 2b of the plunger 2 is inserted into the front end portion 12b of the packing guide tube 12. , The outer periphery of the packing guide cylinder 12 is continuous with the pressing portion 2a of the plunger 2 with the same outer diameter (the state shown in FIG. 1). When the plunger 2 is further protruded from this state, the packing guide tube 12 is pushed by the plunger 2 and is pushed out of the packing structure 3 to be in a state shown in FIG. 3 and the packing 4 is assembled. During this time, the circular inner hole 4
a, which is in close contact with the outer periphery of the packing guide tube 12, presses the pressing portion 2 of the plunger 2 from the packing guide tube 12.
It slides and moves smoothly while keeping close contact with a. Thereafter, the packing guide cylinder 12 is connected to the connecting portion 2c of the plunger 2.
Can be easily removed from

To assemble the packing member 3 when assembling the packing 4, first, the packing guide tube 12 is arranged vertically on the work table with the front end 12 b downward, and then the chamber B is placed on the upper side. The packing case 7 is lowered onto the workbench through the circular inner hole 7a with the packing guide cylinder 12 as a center axis, and then the packing 4 in the state shown in FIG. 8 is pressed against the tightening force of the coil spring 4g. While expanding the circular inner hole 4a, it is housed in the chamber B of the packing case 7 through the packing guide tube 12 as a center axis, and then the seal ring 5 and the seal support ring 6 are sequentially arranged with the packing guide tube 12 as the center axis. It is housed in the chamber B through the circular inner holes 5a and 6a, and then the second packing case 7 is similarly stacked on the first packing case 7 via the ring-shaped sealing material 9, Under Similarly gasket 4, the seal ring 5, sequentially stacked seal support ring 6, finally a packing structure 3 the retainer plate 8 stacked assemble. If necessary, the packing structure 3 is integrated with a plurality of assembly bolts (not shown) that penetrate the intermediate packing case 7 and tighten the outermost packing case 7 and the holding plate 8.

The packing assembly 3 assembled in this manner
Is that the plunger type pump or compressor is stopped for packing replacement, the packing assembly 3 including the used packing 4 is disassembled and removed, and only the connecting portion 2c having a small diameter even if the plunger 2 is long is protruded from the cylinder 1. In this state, the cylinder 1 is assembled to the end face of the cylinder 1 with a plurality of assembly bolts 11 (the state shown in FIG. 1). As mentioned above,
The method in which the packing structure 3 is assembled around the packing guide tube 12 as a central axis and incorporated into the cylinder 1 is easily applied to a horizontal pump or a compressor, but in the case of a vertical pump or a compressor, The tightening force of the coil spring 4g of the packing 4 is weak, and the packing
8, the packing 4 shrinks the circular inner hole 4a as shown in FIG. 8, and the pressing part 2a of the plunger 2 cannot be inserted smoothly. It is not impossible to perform the assembling work while supporting the packing guide tube 12 to be pulled out by hand or the like, but it is an unstable and less reliable work.

In FIG. 3, the packing guide cylinder 13 is provided with a flange 13d at the rear end, and the rear end of the packing guide cylinder 13 is closed. A plurality of through holes 13e through which the assembling bolts 11 for assembling the packing structure 3 to the cylinder 1 are passed, and a first connecting member that connects the flange portion 13d to the pressing plate 8 in the flange portion 13d. A bolt hole 13f through which the bolt 14 is passed is formed. A screw hole 8a for the bolt 14 is formed in the holding plate 8 corresponding to the bolt hole 13f. Further, in the end of the connecting portion 2c of the plunger 2 in the cylinder of the packing guide cylinder 13, a cap divided at least in the axial direction and including a tip portion from a notch portion 2d having a smaller diameter. A coupling 15 is provided, and a screw portion 15 formed on the outer periphery of the tip is provided.
In a, the nut 16 is integrated. A screw hole 15b is formed at the center of the screw portion 15a, and a through hole 13 formed at a closed center portion of the flange portion 13d.
The flange 13 d, that is, the packing guide cylinder 13 and the coupling 15 are connected by a bolt 17 through the g. The coupling 15 is provided with the notch 2d.
The packing guide tube 13 is connected to the plunger 2 via the bolt 17 and the coupling 15 by being connected to the plunger 2 by using the above. The coupling 15, the nut 16, and the bolt 17 form a second connecting member.

In the above configuration, first, the bolt 14 is removed, and the connection between the packing structure 3 and the packing guide cylinder 13 is released. In this state, the packing guide cylinder 13 is connected to the plunger 2 via the second connecting member in a state where the packing guide cylinder 13 completely includes the tapered portion 2b and the connecting portion 2c of the plunger 2. Next, when the plunger 2 is protruded from the cylinder 1, the packing guide cylinder 13 is pushed by the plunger 2 and is pushed out of the packing structure 3, and the pressurizing portion 2 a of the plunger 2 penetrates the packing structure 3, 4 is incorporated. Thereafter, by removing the bolt 17 and the nut 16, the packing guide cylinder 13 and the second
The coupling 15 as the connecting member can be easily removed from the connecting portion 2c of the plunger 2. In order to assemble the packing member 3 when assembling the packing 4, first, the packing guide tube 13 is vertically arranged on the work table with the flange portion 13d downward, and then the holding plate 8 is inserted into the circular inner hole. 8a and overlaid on the flange portion 13d, and the bolts 14 are used to hold down the holding plate 8 and the flange portion 1
3d. Next, the seal supporting ring 6, the seal ring 5, the packing 4, the annular sealing material 9, and the packing case 7 with the chamber B on the lower side are stacked on the holding plate 8, and this stacking is repeated by a required number to form a packing structure. 3
Assemble Further, if necessary, the outer packing case 7 and the holding plate 8 may be inserted through the intermediate packing case 7.
The packing structure can also be integrated by a plurality of assembly bolts (not shown) for tightening.

The packing assembly 3 thus assembled
As shown in FIG. 4, first, the packing structure 3 including the used packing 4 is disassembled and removed, and the plunger 2 is connected to the connecting portion 2 as shown in FIG.
The coupling 15 is assembled with the nut 16 to the distal end of the connecting portion 2c of the plunger 2 while the distal end of the plunger c is pulled into the cylinder 1 to a position where the distal end slightly protrudes. Next, the packing structure 3 is assembled to the end surface of the cylinder 1 by a plurality of assembling bolts 11. Next, the plunger 2 is made to protrude, and temporarily stopped when the tapered portion 2b comes into contact with the tip of the packing guide tube 13, and the packing guide tube 13 is stopped.
The bolt 17 inserted from the through portion 13g at the center of the flange portion 13d is screwed into the screw hole 15b of the coupling 15 to be in the state shown in FIG.

FIG. 5 shows another embodiment in the case of a vertical plunger type pump or compressor. In this embodiment, the connecting portion 2c of the plunger 2 is
The case where it is longer than the axial center length is shown. The packing guide cylinder 18 is provided with a flange portion 18d at the rear end, and the rear end of the packing guide cylinder 18 is formed in a penetrating shape.
A plurality of through holes 18e for passing the assembling bolts 11 for assembling the packing structure 3 to the cylinder 1 and a first connecting member for connecting the flange portion 18d to the holding plate 8 in the flange portion 18d. Bolt hole 1
A bolt hole 18f through which the bolt 4 passes is formed. A second connecting member 19 is inserted between the end surface of the notch 2d of the plunger 2 and the outer surface of the flange 18d so as to surround the notch 2d at most in a semicircle in the circumferential direction of the notch 2d. ing. These first connecting member 14 and second connecting member 19 operate in the same manner as the embodiment shown in FIG.
In each of the above-described embodiments, the packing component 3 may be disassembled and assembled when the packing 4 is replaced with a component mounted on the pump or the compressor. May be.

[0020]

The method for assembling the packing for a plunger and the assembling jig according to the present invention are configured as described above, so that the following effects can be obtained. (1) Since the packing structure including the packing is assembled independently at an arbitrary place such as on a work table outside the plunger type pump or the compressor using the packing guide tube which is an installation jig, the packing Sufficient time is taken before the replacement, care is taken in an easy position and the possibility of damaging the packing is very low. (2) A packing structure is assembled by replacing the plunger with a packing guide cylinder having the same outer diameter as the pressurizing portion of the plunger to which the packing is mounted, and the packing structure is assembled to the cylinder. Since the packing is assembled by projecting the plunger in a state where the pressure and the outer diameter of the pressurizing portion of the plunger are continuous, the operation can be performed easily and easily. (3) Packing replacement, which is the most time-consuming and time-consuming process for replacing the packing, is prepared beforehand by assembling the packing structure with a mounting jig before replacement. It is easy to perform and works in a dangerous atmosphere in a short time.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment using an assembly jig according to the present invention.

FIG. 2 is an operation diagram of FIG. 1;

FIG. 3 is a sectional view showing a second embodiment using the assembly jig according to the present invention.

FIG. 4 is an operation diagram of FIG. 3;

FIG. 5 is a sectional view showing a third embodiment using the assembly jig according to the present invention.

FIG. 6 is a sectional view showing an assembled state of the packing for the plunger.

FIG. 7 is a plan view (normal state) of the packing.

FIG. 8 is a plan view of the packing (in a storage state).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Plunger 3 Packing structure 4 Packing 5 Seal ring 6 Seal support ring 7 Packing case 7a Circular inner hole 8a Circular inner hole 8 Holding plate 11 Assembly bolt 12 Packing guide cylinder 13 Packing guide cylinder 14 Bolt (first connecting member) 15 Coupling (second connection member) 16 Nut (second connection member) 17 Bolt (second connection member) 18 Packing guide cylinder 19 Second connection member

Claims (4)

(57) [Claims] A protruding portion of a plunger (2) protruding from a cylinder (1) of a plunger type pump or a plunger type compressor has a flat plate shape having a circular inner hole (7a).
The inner peripheral portion of a) has a chamber (B) concentrically cut away from one end face, and the chamber (B) has a circular plate-shaped packing having circular inner holes (4a, 5a, 6a).
(4), a plurality of packing cases (7) containing the seal ring (5) and the seal support ring (6), and a circular inner hole (8
a) a flat plate-shaped holding plate (8) having:
(8) as the outermost part, and the chamber of the packing case (7)
(B) The packing structure is formed by sequentially stacking the side end surfaces as the holding plate (8) side, and the packing (4) is divided into three and urged in a direction to reduce the circular inner hole (4a) ( 3)
The plunger (2) is passed through each of the circular inner holes (7a, 4a, 5a, 6a, 8a) with the holding plate (8) side opposite to the cylinder (1), and the packing structure (3) Is mounted on the cylinder (1), wherein the outer diameter is equal to the large-diameter pressurizing portion (2a) of the plunger (2), and the inner diameter is equal to the plunger. (2c) small diameter connection part (2c)
With the packing guide cylinder (12, 13, 18) of a size that can be inserted as a central axis, the circular inner holes (7a, 4a, 5a, 6a, 8a) are previously inserted through the packing guide cylinder (12, 13, 13). 18) to assemble the packing structure (3) including the unused packing (4), and then assemble the plunger (2) in a state where the packing structure (3) is disassembled and removed. It is pulled into the cylinder (1) until only the connection part (2c) having a long diameter at least is protruded,
Next, the packing component (3) assembled to the packing guide cylinder (12, 13, 18) is assembled to the cylinder (1), and then the plunger (2) is removed from the cylinder (1). A method for assembling a packing for a plunger characterized by protruding. 2. After the packing component (3) assembled to the packing guide cylinder (13, 18) is assembled to the cylinder (1), a large-diameter pressurizing portion ( With the plunger (2) protruding until the packing guide tube (13, 18) abuts on the tip of the packing guide tube (13, 18), the packing guide tube (1
3. The method of assembling a packing for a plunger according to claim 1, wherein the plunger (2) is connected to the plunger (2) and then the plunger (2) is protruded from the cylinder. 3. A protruding portion of a plunger (2) projecting from a cylinder (1) of a plunger pump or a plunger compressor has a flat plate shape having a circular inner hole (7a).
The inner peripheral portion of a) has a chamber (B) concentrically cut away from one end face, and the chamber (B) has a circular plate-shaped packing having circular inner holes (4a, 5a, 6a).
(4), a plurality of packing cases (7) containing the seal ring (5) and the seal support ring (6), and a circular inner hole (8
a) a flat plate-shaped holding plate (8) having:
(8) as the outermost part, and the chamber of the packing case (7)
(B) The packing structure is formed by sequentially stacking the side end surfaces as the holding plate (8) side, and the packing (4) is divided into three and urged in a direction to reduce the circular inner hole (4a) ( 3)
The plunger (2) is passed through each of the circular inner holes (7a, 4a, 5a, 6a, 8a) with the holding plate (8) side opposite to the cylinder (1), and the packing structure (3) A plunger packing assembling jig for assembling the plunger into the cylinder (1), wherein the overall shape is a cylindrical shape, and the outer diameter of the cylindrical shape is a large-diameter pressing portion (2a) of the plunger (2). ), The inner diameter of the cylindrical shape is a small-diameter connection portion (2c) of the plunger (2).
The packing at the end opposite to the holding plate (8) even if the length of the cylindrical shape is shorter than the outer end surface of the holding plate (8) of the packing structure (3). A jig for assembling a packing for a plunger, comprising a packing guide cylinder (13, 18) having a length extending beyond the packing (4) stored in a case (7). 4. The packing guide cylinder (13, 18) has a flange portion (13d, 18d) at one end of the cylinder, and the flange portion (13d, 18d).
18d), a first connecting member (14) for connecting the packing guide tube (13, 18) and the packing structure (3), the packing guide tube (13, 18), and the packing guide tube (13, 18). The plunger according to claim 3, characterized in that a second connecting member (15, 16, 17, 19) for connecting the plunger (2) inserted into the connecting part (2c) inserted into the plunger (2) is provided. Jig for assembling packing.