CN211191645U

CN211191645U - Packing forming mould

Info

Publication number: CN211191645U
Application number: CN201921119485.0U
Authority: CN
Inventors: 康卫红; 饶红兵; 赵品钢; 孙博; 马素林; 耿建平; 张兵; 顾明; 郭勇; 石娜; 郭隆刚; 王占河; 崔海岩
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-08-07
Anticipated expiration: 2029-07-17

Abstract

The utility model provides a packing shaping mould. The utility model provides a packing filler shaping mould, including mounting, sleeve and stamping workpiece, the mounting includes fixing base and the fixed axle of perpendicular connection, and stamping workpiece and sleeve are established in proper order and are established on the fixed axle, and the packing filler is located between sleeve tip and the fixing base surface, and the stamping workpiece is used for supporting under the exogenic action and pushes away the sleeve and make it remove towards the fixing base to shaping packing filler. The utility model provides a packing filler shaping mould simple structure, the shaping effect is better, and fashioned packing filler leakproofness is good, difficult the leakage.

Description

Packing forming mould

Technical Field

The utility model relates to a packing filler shaping technical field especially relates to a packing filler shaping mould.

Background

The valve in the oil refining device is widely used, and the valve needs to be opened frequently in practical use, so that the sealing performance requirement on the position of the valve is higher, and the condition that crude oil or other grease and the like in the device are leaked from the valve to cause environmental pollution or other damages is avoided.

The valve is usually provided with a valve stuffing box, packing stuffing is arranged in the valve stuffing box, and the packing stuffing is extruded at a gap on the outer wall of the valve through the valve stuffing box so as to seal the valve. Packing filler need change after using a period of time, can directly adopt fashioned packing filler to replace, nevertheless because the variety of valve is various and not of uniform size, if whole purchase shaping product, then the packing filler kind that needs to purchase is numerous and diverse, the expense is high, and has the possibility that the size of the packing filler of purchase does not accord with actual demand. Therefore, during on-site maintenance, most of the packing fillers are replaced in an on-site cutting mode, the cut packing fillers are overlapped, then the packing fillers are manually adjusted into a circular ring shape and are installed in the valve stuffing box, and the packing fillers are pressed and formed through the packing gland of the valve stuffing box.

However, the packing filler cut on site and formed manually often has the problems that the lap joint of the lap joint part cannot be compacted or the effective sealing area is not enough due to poor forming, and the like, which can cause that the sealing performance of the packing filler cannot meet the requirement, and the valve leaks.

SUMMERY OF THE UTILITY MODEL

The utility model provides a packing shaping mould, simple structure, the shaping effect is better, and fashioned packing leakproofness is good, difficult the leakage.

The utility model provides a packing shaping mould for shaping packing, including mounting, sleeve and stamping workpiece, the mounting includes fixing base and the fixed axle of perpendicular connection, and stamping workpiece and sleeve are established in proper order and are established on the fixed axle, and packing is located between sleeve tip and the fixing base surface, and the stamping workpiece is used for supporting under the exogenic action and pushes away the sleeve and make it remove towards the fixing base, packs with shaping packing.

In a possible embodiment, the stamping part comprises a head part and a hollow connecting part, the connecting part is located on one side of the head part, the inner wall and the outer wall of the connecting part are respectively abutted with the outer wall of the fixed shaft and the inner wall of the sleeve, and the other side of the head part is used for bearing external force.

In one possible embodiment, a gap is provided between the end of the connecting part connected to the head part and the end of the fixed shaft.

In a possible embodiment, an annular groove is provided on the fixing base, the packing is located in the annular groove, and the end of the sleeve extends into the annular groove.

In one possible embodiment, the outer wall of the sleeve and the inner wall of the annular groove abut.

In a possible embodiment, the sleeve end is provided with an annular groove, the packing is located in the annular groove, and the surface of the fixing seat is provided with an annular boss which extends into the annular groove.

In one possible embodiment, the outer wall of the annular boss abuts the inner wall of the annular groove.

In a possible implementation mode, the end part of the sleeve is provided with an inwards concave annular step, an annular groove is formed between the annular step and the outer wall of the connecting part, the packing is located in the annular groove, and the surface of the fixing seat is provided with an annular boss which extends into the annular groove.

In a possible embodiment, the outer wall of the annular boss abuts against the side wall of the annular step and the outer wall of the connecting part.

In a possible embodiment, the cross section of the side of the head part that receives the external force is curved.

The utility model provides a packing filler shaping mould, be used for shaping packing to pack, mainly by the mounting, sleeve and stamping workpiece are constituteed, the mounting includes fixing base and the fixed axle of perpendicular connection on the fixing base surface, stamping workpiece and sleeve are established in proper order and are established on the fixed axle, through placing packing between sleeve terminal surface and fixing base surface, exert slight hitting power on the stamping workpiece, the stamping workpiece can produce the removal towards the fixing base, frictional force between stamping workpiece and the sleeve can drive the sleeve and produce the small removal towards the fixing base, distance between sleeve tip and the fixing base surface reduces, sleeve tip and the inward extrusion of fixing base surface are located the packing filler between the two, the lap joint extrusion that makes the packing filler is closely knit, the packing filler shaping is closely knit degree, the packing filler that sealing performance meets the requirements is packed. The utility model discloses a packing filler shaping mould, simple structure, the shaping effect is better, and fashioned packing filler leakproofness is good, difficult the leakage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural view of a packing forming mold according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a fixing member according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a sleeve according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a stamping part according to an embodiment of the present invention;

fig. 5 is a schematic structural view of another packing filler forming mold according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a third packing filler forming mold according to an embodiment of the present invention.

Description of reference numerals:

1-a fixing piece; 11-a fixed seat; 12-a fixed shaft; 2-a sleeve; 3-stamping parts; 31-an end head portion; 32-a connecting portion; 4-packing filler; 5-an annular groove; 6-annular boss; 7-annular step.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Fig. 1 is a schematic structural view of a packing forming mold according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a fixing member according to an embodiment of the present invention; fig. 3 is a schematic structural view of a sleeve according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a stamping part according to an embodiment of the present invention; fig. 5 is a schematic structural view of another packing filler forming mold according to an embodiment of the present invention; fig. 6 is a schematic structural diagram of a third packing filler forming mold according to an embodiment of the present invention.

As shown in fig. 1 to 6, the present embodiment provides a packing 4 molding clamping fixture for molding packing 4, including a fixing member 1, a sleeve 2 and a stamping part 3, where the fixing member 1 includes a fixing seat 11 and a fixing shaft 12 that are vertically connected, the stamping part 3 and the sleeve 2 are sequentially sleeved on the fixing shaft 12, the packing 4 is located between an end of the sleeve 2 and a surface of the fixing seat 11, and the stamping part 3 is used for pushing the sleeve 2 to move toward the fixing seat 11 under an external force, so as to mold the packing 4.

The 4 shaping moulds of packing that this embodiment provided are used for shaping packing 4, and the valve packing 4 that mainly used shaping refining chemical plant valve used (packing 4 for short hereafter), to the packing 4 that uses in other devices and the valve packing 4 that 4 structures of packing and size are similar, the 4 shaping moulds of packing of this embodiment also can carry out the shaping to it, and it is no longer repeated here.

Specifically, 4 shaping moulds of packing filler comprises mounting 1, sleeve 2 and stamping workpiece 3, and mounting 1 includes fixing base 11 and fixed axle 12, and fixed axle 12 is connected perpendicularly on one side surface of fixing base 11, for making mounting 1 have better mechanical strength, and fixed axle 12 and fixing base 11 can be integrated into one piece spare to fixed axle 12 is located the central point of fixing base 11, and the structural symmetry of mounting 1 is good like this, and the atress is effectual. The stamping part 3 and the sleeve 2 are sleeved on the fixed shaft 12 of the fixing part 1, wherein the stamping part 3 is sleeved on the outer wall of the fixed shaft 12, and the sleeve 2 is sleeved on the outer wall of the stamping part 3.

When the packing 4 is molded, the length of the packing 4 matched with the diameter of a valve rod in a valve is measured and calculated usually according to the diameter of the valve rod, the packing 4 with proper length is cut by a cutter of the packing 4 of the valve, and then two ends of the packing 4 are lapped together, so that the packing 4 forms a circular ring shape. Before placing packing 4, sleeve 2 has the clearance towards the tip of the one end of fixing base 11 and fixing base 11 between the surface, and the packing 4 of ring shape is placed in this clearance promptly, after placing, and 2 tip of sleeve and 11 surfaces of fixing base fix packing 4 between the two, and there is not the clearance mutual butt between the three, or packing 4 because of the action of gravity laminating on 11 surfaces of fixing base, and can have little clearance between 2 tip of sleeve and the packing 4.

Then the packing filler 4 is placed on the surface of the fixed seat 11, the sleeve 2 is sleeved on the fixed shaft 12, and after the end part of the sleeve 2 corresponds to the packing filler 4, the stamping part 3 is sleeved in a gap between the fixed shaft 12 and the sleeve 2, the stamping part 3 generates displacement towards the fixed seat 11 along the axial direction of the fixed shaft 12 by applying an external force towards the fixed seat 11 to the stamping part 3, the sleeve 2 is sleeved on the outer side of the stamping part 3, when the stamping part 3 moves towards the fixed seat 11, the friction force between the stamping part 3 and the sleeve 2 can drive the sleeve 2 to move towards the fixed seat 11, the distance between the end part of the sleeve 2 and the surface of the fixed seat 11 is reduced, so the packing filler 4 between the end part of the sleeve 2 and the surface of the fixed seat 11 is tightly attached to the sleeve and the fixed seat, and the packing filler 4 is pressed inwards by the, the lap joints at the two ends of the packing filler 4 are tightly jointed, so that the packing filler 4 with good compactness and meeting the requirement of sealing performance can be formed.

After the packing filler 4 is formed, the stamping part 3 and the sleeve 2 are deviated from the fixing seat 11 to move on the fixing shaft 12 of the fixing part 1, the gap between the end part of the sleeve 2 and the fixing seat 11 is enlarged, the packing filler 4 can move on the fixing shaft 12, finally the stamping part 3 and the sleeve 2 are taken down from the fixing part 1, the packing filler 4 can be taken out from the end part of the fixing shaft 12 of the fixing part 1, and then the packing filler 4 in the annular shape formed by stamping is filled into a valve filler box on a valve rod. Through the fashioned packing of the 4 shaping moulds of packing filler 4 of this embodiment, the lap joint degree of compaction is good, and the shaping is effectual, has sufficient effective seal area, can be inseparable with the valve rod laminating, and is good to the sealing performance of valve rod, and the valve is difficult for leaking.

It should be noted that, for the stamping part 3 and the sleeve 2 sleeved on the fixed shaft 12 of the fixing part 1, the fixed shaft 12, the stamping part 3 and the sleeve 2 should be tightly attached to each other, so that when an external force is applied to the stamping part 3, the stamping part 3 does not shake on the fixed shaft 12, the effect of transferring an acting force is good, and the stamping part 3 and the fixed shaft 12 are not damaged due to uneven distribution and unstable connection of the acting force; and the effort that stamping workpiece 3 received can effectively transmit rather than being connected inseparable sleeve 2, can make sleeve 2 produce the small displacement towards fixing base 11, just so can make sleeve 2 and fixing base 11 can produce better squeezing action to packing filler 4 to guarantee the shaping effect of packing filler 4.

In addition, when external force is applied to the stamping part 3, a hand hammer and other tools can be adopted to lightly knock the stamping part 3, so that the stamping part 3 can drive the sleeve 2 to generate small displacement on the fixed shaft 12 towards the fixed seat 11, and the packing filler 4 is extruded and formed; meanwhile, the knocking force should not be too large, so that the sleeve 2 is prevented from moving too much on the fixing seat 11, the extrusion force generated on the packing filler 4 is too large, the packing filler 4 is damaged or cannot meet the use requirement, the structural integrity of the packing filler 4 forming mould can be protected, and the phenomena that cracks or local damage occur to the stamping part 3, the sleeve 2 and the fixing part 1 and the like due to the too large knocking force in the long-term use process are avoided, so that the strength of the packing filler 4 forming mould is reduced, the stability of the packing filler 4 forming mould is influenced, and the service life of the packing filler is further shortened.

For the valve rods with different sizes, the packing fillers 4 with different diameters and thicknesses correspond to each other, so the specific sizes of each part of the packing filler 4 forming mould need to be designed according to the packing fillers 4 with corresponding specifications required by the different valve rods, which will be described in detail below and will not be described again.

Because packing 4 is linear packing 4 that one section of cutting accords with the length requirement, the cutting end at its both ends makes packing 4 shaping be closely knit annular packing 4 in the forming process overlap joint together, can connect closely when the overlap joint in order to make the cutting end at both ends, in this embodiment, packing 4 both ends can be cut for 45 jiaos, when receiving

sleeve

2 and 11 extrusion of fixing base and overlap joint, the ductility of such overlap joint end structure is better, can ensure that the overlap joint position of packing 4 connects closely.

As shown in fig. 1 and 4, in a possible embodiment, the stamping part 3 may include an end head part 31 and a hollow connecting part 32, the connecting part 32 is located on one side of the end head part 31, the inner wall and the outer wall of the connecting part 32 are respectively abutted with the outer wall of the fixed shaft 12 and the inner wall of the sleeve 2, and the other side of the end head part 31 is used for receiving external force.

Because the stamping part 3 is sleeved on the fixed shaft 12 of the fixing part 1 and abutted against the sleeve 2, and the stamping part 3 is also directly subjected to impact force, the stamping part 3 of the embodiment is composed of the end part 31 and the connecting part 32, the connecting part 32 is connected to one side of the end part 31, the connecting part 32 is of a hollow structure and is sleeved on the fixed shaft 12 of the fixing part 1, and therefore the inner diameter of the connecting part 32 is matched with the outer diameter of the fixing part 1; the end part 31 is located the whole outside of packing 4 shaping mould, and end part 31 opposite side is the outside, and this side is the position of accepting external force, and the operator can hand the hand hammer and correspond this side of knocking end part 31, makes stamping workpiece 3 produce the displacement to fixing base 11 to drive sleeve 2 and remove towards fixing base 11.

The end portion 31 of the stamping part 3 is a bearing portion for receiving the knocking force, specifically, the outermost side surface of the end portion 31, as shown in fig. 4, in one embodiment, the cross section of the side of the end portion 31 receiving the external force may be an arc shape. The bearing surface of the outermost side of the end part 31 for bearing external force is an arc-shaped surface, the highest point of the arc-shaped surface is located on the axis of the fixed shaft 12 of the fixing part 1, when external force is applied to the arc-shaped surface of the end part 31, the action point of the external force is mainly concentrated on the highest point of the arc-shaped surface, the external force is uniformly dispersed to other parts of the arc-shaped surface through the highest point of the arc-shaped surface, the external force is uniformly transmitted to the outer wall of the hollow connecting part 32 through the end part 31, the connecting part 32 can move forwards along the fixed shaft 12 in a balanced manner, the action force transmitted to the sleeve 2 by the connecting part 32 is uniformly dispersed in the radial direction, the sleeve 2 can move towards the fixed seat 11 in a balanced manner, and the action force of the sleeve 2 to all parts of the packing 4 is balanced, so that the packing.

In another embodiment, the cross section of the side of the end portion 31 receiving the external force may also be a plane, so that the bearing surface formed by the end portion 31 is a plane, when an operator uses a tool such as a hand hammer to strike the plane of the end portion 31, the contact area between the hand hammer and the end portion 31 is large, the striking accuracy is correspondingly improved, and the external force acts on the plane, the acting force is vertically towards the connecting portion 32, the acting force direction is along the axial direction of the connecting portion 32, and the connecting portion 32 receives a large axial force, so that the connecting portion moves towards the fixing base 11.

In order to allow the stamping part 3 to move the sleeve 2 toward the fixing seat 11 during the application of the external force to the end head part 31, optionally, a gap may be formed between the end of the connecting part 32 connected with the end head part 31 and the end of the fixing shaft 12. Through the inner wall that makes connecting portion 32 tip, the one end of connecting portion 32 being connected with tip 31 has the space with between the fixed axle 12 tip promptly, when knocking tip 31 like this, because the existence in this space, fixed axle 12 does not contact with tip 31, therefore it can pass through the more transmission of tip 31 to connecting portion 32 to beat effort accessible, connecting portion 32 is also great to sleeve 2's effort, therefore sleeve 2 has stronger squeezing action to packing filler 4, can ensure that packing filler 4 extrudees closely knit, the shaping is sealing performance good, packing filler 4 that accords with operation requirement.

Specifically, a gap may be formed between the end portion of the stamping part 3 and the fixed seat 11, so that when the end head portion 31 is knocked, a gap between one end of the connecting portion 32 connected with the end head portion 31 and the end portion of the fixed shaft 12 is reduced, a gap between the other end of the connecting portion 32 and the fixed seat 11 is reduced, the connecting portion 32 moves towards the fixed seat 11, the sleeve 2 is driven to move towards the fixed seat 11, and the sleeve 2 and the fixed seat 11 are enabled to extrude the packing 4; or, the end of the stamping part 3 abuts against the surface of the fixed seat 11, and no gap exists between the end of the stamping part and the fixed seat 11, so that the vibration acting force generated by knocking the end head 31 can be transmitted to the sleeve 2, and the sleeve 2 can also move towards the fixed seat 11 under the acting force, so that the sleeve 2 and the fixed seat 11 can press the packing 4.

In order to make the packing 4 between the end of the sleeve 2 and the surface of the fixed seat 11 be extruded into the packing 4 with the required structural dimension, as shown in fig. 1 and 2, in a possible embodiment, an annular groove 5 may be provided on the fixed seat 11, the packing 4 is located in the annular groove 5, and the end of the sleeve 2 extends into the annular groove 5.

Through set up annular groove 5 on fixing base 11, sleeve 2 corresponds annular groove 5's position and size and sets up to make sleeve 2's tip can stretch into in annular groove 5, can place packing 4 in annular groove 5 like this, packing 4's length and annular groove 5's girth looks adaptation, so that place packing 4 new city ring shape in annular groove 5, and packing 4 both ends can be in the same place in the overlap joint. Sleeve 2 stretches into in the annular groove 5 of fixing base 11, when knocking stamping workpiece 3, stamping workpiece 3 can make sleeve 2 produce small displacement towards the tank bottom of annular groove 5 to sleeve 2's effort, 2 tip extrusion of sleeve are located the packing filler 4 of annular groove 5, packing filler 4 receives extrusion deformation and closely laminates with the lateral wall and the diapire of annular groove 5, the both ends of packing filler 4 are also the overlap joint together, can make the shaping of packing filler 4 be the ring shape packing filler 4 that matches with the 5 shapes of annular groove like this.

In particular, the outer wall of the sleeve 2 may abut against the inner wall of the annular groove 5. Even if sleeve 2 produces small removal in annular groove 5 like this, the outer wall of sleeve 2 receives the effect of blockking of 5 inner walls of annular groove, and sleeve 2 can not produce rocking in radial direction, therefore can not be owing to rock and produce the unbalanced effort in the week to packing 4, can ensure that fashioned packing 4 is the packing 4 that the structure is even, closely knit degree is even.

It should be noted that the position and size of the annular groove 5 on the surface of the fixed seat 11 can be determined according to the size specification of the packing 4 to be adapted to the valve stems with different diameters, the diameter and thickness of the sleeve 2 corresponding to the position and width of the annular groove 5 are designed correspondingly, and the diameter and wall thickness of the connecting portion 32 of the stamping part 3 are designed according to the diameter of the fixed shaft 12 and the width of the gap between the inner wall of the sleeve 2 and the outer wall of the fixed shaft 12.

For example, the fixing element 1, the sleeve 2 and the stamping 3 may be made of 45 # steel through modulation processing, for a valve with a valve stem diameter of 20mm, the diameter D1 of the fixing shaft 12 of the fixing element 1 corresponds to 20mm, the inner diameter of the formed packing 4 may be 30mm, and the outer diameter may be 50mm, so the inner diameter D2 of the annular groove 5 corresponding to the fixing element 11 on the fixing base 11 is 30mm, the outer diameter D3 is 50mm, and the thickness of the packing 4 may be 5mm, so the height of the annular groove 5 should be greater than 5mm, for example, the height of the annular groove 5 may be 8mm, the distance L1 from the groove bottom of the annular groove 5 to the outer surface of the fixing base 11, that is, the thickness of the thinnest part of the fixing base 11 may be 7mm, the length L2 of the fixing shaft 12 may be 40mm, the overall length L3 of the fixing element 1 may be 55mm, and the outer diameter D4 of the fixing base.

The sleeve 2 is located in the annular groove 5, and the inner wall and the outer wall of the sleeve 2 are respectively abutted with the side walls of the two sides of the annular groove 5, so that for the valve with the valve rod diameter of 20mm, the inner diameter D5 of the sleeve 2 can be 30mm, the outer diameter D6 can be 50mm, and the height L4 of the sleeve 2 is 40 mm.

Connecting portion 32 of stamping 3 is fitted over the outer wall of stationary shaft 12, and the outer wall of connecting portion 32 abuts against the inner wall of sleeve 2, so inner diameter D7 of connecting portion 32 of stamping 3 may be 20mm, and outer diameter D8 may be 30mm, as described above, a gap may be provided between the end of connecting portion 32 connected to tip portion 31 and the end of stationary shaft 12, so length L5 of connecting portion 32 may be greater than 40mm, for example, length L5 of connecting portion 32 is 55mm, and tip portion 31 of stamping 3 may be a hemispherical surface with a radius of 20mm, so that overall length L6 of stamping 3 is 75 mm.

TABLE 1

Valve rod outside diameter (mm)	Packing stuffing 4 thickness (mm)	D1(mm)	D2(mm)	D3(mm)	D4(mm)
						Φ15	4	15	23	43	53
Φ20	5	20	30	50	60
						Φ25	6	25	37	57	67
Φ30	8	30	46	66	76
						Φ35	10	35	55	75	85
Φ40	12	40	64	84	94
						Φ45	14	45	73	93	103

TABLE 2

Valve rod outside diameter (mm)	Packing stuffing 4 thickness (mm)	D5(mm)	D6(mm)
				Φ15	4	23	43
Φ20	5	30	50
				Φ25	6	37	57
Φ30	8	46	66
				Φ35	10	55	75
Φ40	12	64	84
				Φ45	14	73	93

TABLE 3

Valve rod outside diameter (mm)	Packing stuffing 4 thickness (mm)	D7(mm)	D8(mm)
				Φ15	4	15	23
Φ20	5	20	30
				Φ25	6	25	37
Φ30	8	30	46
				Φ35	10	35	55
Φ40	12	40	64
				Φ45	14	45	73

For valves with valve stems of other sizes, the packing 4 molding mold of the embodiment can also design the corresponding size specifications of the fixing piece 1, the sleeve 2 and the stamping piece 3 according to the specific size of the valve stem. Specifically, as shown in fig. 2 to 4, the present embodiment lists dimensions of the fixing member 1, the sleeve 2 and the stamping member 3 corresponding to several conventional valve stems, as shown in the above table 1, table 2 and table 3, where table 1 is a machining dimension table of the fixing member corresponding to several conventional valve stem dimensions, table 2 is a machining dimension table of the sleeve corresponding to several conventional valve stem dimensions, and table 3 is a machining dimension table of the stamping member corresponding to several conventional valve stem dimensions. Wherein, table 1, table 2 and table 3 include the specific size of each part of packing 4 shaping mould that the diameter is 20 mm's valve rod corresponds.

As shown in fig. 5, besides the way of providing the annular groove 5 on the fixing seat 11 and making the end of the sleeve 2 extend into the annular groove 5, in another specific embodiment, the end of the sleeve 2 may be provided with the annular groove 5, the packing 4 is located in the annular groove 5, the surface of the fixing seat 11 may be provided with the annular boss 6, and the annular boss 6 extends into the annular groove 5.

So, through setting up annular groove 5 at 2 tip of sleeve, packing 4 is located this annular groove 5, sets up annular boss 6 on fixing base 11 correspondingly, and annular boss 6 stretches into in annular groove 5, can utilize annular groove 5 and annular boss 6 to packing 4's extrusion equally, and shaping packing 4 is no longer repeated here. Specifically, the outer wall of the annular boss 6 can abut against the inner wall of the annular groove 5.

In a third specific embodiment, as shown in fig. 6, the end of the sleeve 2 may have a concave annular step 7, an annular groove 5 may be formed between the annular step 7 and the outer wall of the connecting portion 32, the packing 4 is located in the annular groove 5, and an annular boss 6 may be provided on the surface of the fixing seat 11, and the annular boss 6 extends into the annular groove 5.

In this embodiment, 2 tip of sleeve and fixing base 11 form the inside packing 4's of annular space extrusion structure, still can be for setting up annular step 7 at 2 tip of sleeve, and this annular step 7 is sunken to the inner wall by the outer wall, and 3 connecting portion 32 outer walls of stamping workpiece and 2 inner wall butts of sleeve, and connecting portion 32 outer walls and 7 inner walls of annular step form annular groove 5 altogether, set up annular boss 6 on 11 surfaces of fixing base equally, make annular boss 6 stretch into in the annular groove 5. Packing 4 is located annular groove 5, and annular boss 6 and annular groove 5 inwards extrude packing 4, shaping packing 4. Specifically, the outer wall of the annular boss 6 can abut against the side wall of the annular step 7 and the outer wall of the connecting part 32.

It should be noted that, for the two structural forms, the sizes such as the wall thickness of the sleeve 2 need to be correspondingly adjusted to fit the size of the required packing 4, and details are not repeated.

The packing filler shaping mould that this embodiment provided, be used for shaping packing, mainly by the mounting, sleeve and stamping workpiece are constituteed, the mounting includes fixing base and the fixed axle of vertical connection on the fixing base surface, stamping workpiece and sleeve are established in proper order and are established on the fixed axle, place between sleeve terminal surface and fixing base surface through packing, exert slight hitting power on the stamping workpiece, the stamping workpiece can produce the removal towards the fixing base, frictional force between stamping workpiece and the sleeve can drive the sleeve and produce the small removal towards the fixing base, distance between sleeve tip and the fixing base surface reduces, sleeve tip and the inward extrusion of fixing base surface are located the packing filler between the two, make the overlap joint extrusion of packing filler closely knit packing, the packing shaping is closely knit degree good, sealing performance accords with the packing filler of requirement. The utility model discloses a packing filler shaping mould, simple structure, the shaping effect is better, and fashioned packing filler leakproofness is good, difficult the leakage.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a packing shaping mould for shaping packing, a serial communication port, including mounting, sleeve and stamping workpiece, the mounting includes fixing base and the fixed axle of perpendicular connection, the stamping workpiece with the sleeve is established in proper order the cover is established on the fixed axle, packing is located the sleeve tip with between the fixing base surface, the stamping workpiece is used for supporting under the exogenic action and pushes away the sleeve makes its orientation the fixing base removes, with the shaping packing.

2. The packing forming mold according to claim 1, wherein the stamping part includes a head portion and a hollow connecting portion, the connecting portion is located on one side of the head portion, an inner wall and an outer wall of the connecting portion are respectively abutted against the outer wall of the fixed shaft and the inner wall of the sleeve, and the other side of the head portion is used for bearing external force.

3. The packing forming mold according to claim 2, wherein a gap is formed between an end of the connecting portion connected to the end portion and the end portion of the fixing shaft.

4. The packing forming jig according to any one of claims 1 to 3, wherein an annular groove is provided on the fixing base, the packing is located in the annular groove, and the end portion of the sleeve extends into the annular groove.

5. The packing forming mold according to claim 4, wherein the outer wall of the sleeve abuts against the inner wall of the annular groove.

6. The packing forming jig according to any one of claims 1 to 3, wherein an annular groove is formed in an end portion of the sleeve, the packing is located in the annular groove, and an annular boss is formed on a surface of the fixing seat and extends into the annular groove.

7. The packing forming mold according to claim 6, wherein the outer wall of the annular boss abuts against the inner wall of the annular groove.

8. The packing forming mold according to claim 2, wherein the sleeve end portion has an inwardly concave annular step, an annular groove is formed between the annular step and the outer wall of the connecting portion, the packing is located in the annular groove, and an annular boss is provided on the surface of the fixing seat and extends into the annular groove.

9. The packing forming mold according to claim 8, wherein the outer wall of the annular boss abuts against the side wall of the annular step and the outer wall of the connecting portion.

10. The packing forming mold according to claim 2, wherein a cross section of a side of the end portion receiving the external force is arc-shaped.