CN207813627U - A kind of shield segment assembling location lug set - Google Patents

Abstract

A kind of shield segment assembling location lug set, the utility model has abandoned the complicated shield duct piece design for using locating bar or concave-convex tongue-and-groove in the prior art, in shield duct piece side（Joint face）The position of prefabricated positioning groove; location lug set is installed between two panels section of jurisdiction additional for installing limit; it can be effectively protected arc again while ensure that section of jurisdiction construction assembling spacing requirement and connect bolt; make punching block design processing technology optimization; steel bushing insertion production is also added inside location lug set, pipe sheet assembling cyclization construction quality is effectively ensured.

Description

A kind of shield segment assembling location lug set

Technical field

The utility model is related to a kind of shield segment assembling location lug sets.

Background technology

There is " faulting of slab ends " phenomenon when constructing assembled in shield duct piece when to prevent assembly, influence construction assembly, structure stress State, waterproof effect, serious entail dangers to safety for tunnel engineering.As shown in Fig. 1-1,1-2, when initial shield duct piece designs, Blocking surface（Joint face）The concave-convex tongue-and-groove of design, limits when ensureing pipe sheet assembling, though the design facilitates construction assembly, to knot Structure designs and cost of manufacture brings adverse effect.It is influenced to reduce this respect, as shown in Fig. 2-1,2-2, when Segment design takes Disappeared the design of rebate, increases locating bar

It is limited, which is that semi-circular recesses are preset on blocking surface, locating bar is arranged when assembled in groove, this side Formula is slightly promoted compared with initial design, but which increase segment die cost of manufacture, and arc connection bolt also cannot get effective protection.

Utility model content

The purpose of this utility model is the deficiency for above-mentioned existing pipe sheet assembling technology, preferably to reduce shield duct piece Mold Making cost, effective protection arc connect bolt, provide a kind of shield segment assembling location lug set.In blocking surface（Pipe The joint face of piece）The prefabricated positioning groove in arc link bolt hole position, and nylon location lug is set in assembly and is covered for assembly When limit, internal is that arc connects bolt, and being effectively protected arc while positioning connects bolt, avoids because external force is excessive The case where leading to bolt fracture.

The technical solution of the utility model is as follows：A kind of shield segment assembling location lug set, characterized in that the location lug set Identical by two bottom surfaces and overlap the round platform of connection and constitute, the taper of two round platforms is different, and location lug set is axially arranged with connection Chamber；The location lug covers injection molding, including following each component is prepared：Polyhexamethylene adipamide, synergistic fire retardant, intumescent Fire retardant, compatilizer, glass fibre.

Further, the mass percent of each component is in the location lug set：Polyhexamethylene adipamide 60%, collaboration resistance Fire agent 13%, expansion type flame retardant 3%, compatilizer 2%, glass fibre 22%.

Further, the synergistic fire retardant is zinc borate.

Further, the location lug set is internal is embedded with steel bushing.

Further, one of round platform lateral surface is equipped with several annular bonding agent conduits.

Further, the round platform lateral surface smaller in taper is arranged in the annular bonding agent conduit, another taper is larger Round platform, lateral surface is made of the outside conical surface, the inside conical surface, and the taper of the inside conical surface is more than the taper of the outside conical surface.

Further, the location lug set connecting cavity is made of the tubaeform chamber of the cylinder chamber at middle part and both sides.

Above-mentioned location lug is sleeved on the application in shield segment assembling, characterized in that includes the following steps：

1）Prefabricated shield duct piece：Mould for shielding pipe piece, production shield duct piece are made according to construction requirement, shield duct piece makes When, arc link bolt hole is respectively set at the joint face of its both sides, arc link bolt hole is in shield duct piece joint face Positioning groove is arranged in one end, and being equipped with bolt in the inside cambered surface of shield duct piece installs counterbore, the counterbore and arc link bolt hole The other end communicate；The madial wall of the positioning groove is the cone structure to match with round platform lateral surface, two neighboring shield The junction of section of jurisdiction, the positioning groove of one of joint face, cross section are round, the positioning groove of another joint face, Its cross section elongated hole-shape in a ring；

2）Prepare location lug set：1. making mold, design taper cut-off rule is die parting line, by uniformly arrangement four from top to bottom A cavity；

2. poly- adipoyl hexamethylene diamine, glass fibre are put into 110 DEG C of vacuum drying chamber and are dried in vacuo, after the completion Synergistic fire retardant, expansion type flame retardant, compatilizer is added uniformly to be mixed；

3. installing location lug mold in screw injection molding machine, adjustment screw barrel temperature：Back segment temperature is 260-300 DEG C, stage casing temperature be 265-295 DEG C, front-end temperature is 260-290 DEG C, nozzle temperature be 250-270 DEG C, mold temperature 30- 80 DEG C, injection pressure 75-130MPa, screw speed 70-110r/min, location lug set is finally made in a mould four；

3）Assembled shield duct piece is covered using location lug：When section of jurisdiction cyclization is assembled, in the annular bonding agent conduit of location lug set Interior addition bonding agent screws in one end of location lug cuff bonding agent in the round positioning groove of shield duct piece, assembled after the completion Next piece of shield duct piece；Next piece of section of jurisdiction makes the other end that location lug covers slow by the tangential direction rotation of location lug set center line Slow-motion enters in the block section of jurisdiction annular elongated hole-shape positioning groove；After the completion, two shield duct pieces are passed through using arc connection bolt The connecting cavity of arc link bolt hole and location lug set, carries out adjacent two pieces of shield duct pieces to be bolted fixation, location lug Also effective protection arc connection bolt while being sleeved on positioning；It is circumferential assembled with hold, shield duct piece spelling identical to assembling method It is had to when dress using annular elongated hole-shape positioning groove adjustment good position, then the tangential direction along location lug set center line, which allows, determines Position tenon set enters in next piece of section of jurisdiction positioning groove, carries out successively assembled.

Further, step 2）In, when injection molding after die sinking by steel bushing location and installation in mold cavity, then mold, add Pay attention to adjustment shot after entering steel bushing, prevent that overlap is closed in excessive salivation, eventually forms the internal location lug for being embedded with steel bushing Set.

Further, step 1）In, arch screw bolt is set in mould for shielding pipe piece and shapes plug, positioning mold insert, arc Bolt forming plug one end is connect with mold core, and the other end is connect with positioning mold insert, and positioning mold insert is installed on section of jurisdiction mould by bolt In the location hole for having side form, positioning mold insert is internally provided with vestibule；After shield duct piece is made, removes arch screw bolt and shape plug, shape At link bolt hole, positioning mold insert is removed, positioning groove is formed.

Location lug set in the utility model uses nylon66 fiber for major ingredient, and nylon66 fiber quality is lighter, is readily transported and installs, Using injection molding, fabrication cycle is short, high mechanical strength, good toughness, has higher tension, compression strength, specific tensile strength high It is strong to the absorbability for impacting, answering force vibration in metal, it is not easy to break.Nylon66 fiber also has preferable heat-resisting, wear-resisting, corrosion resistant Corrosion energy, after glass fiber reinforcement, mechanical strength, rigidity, heat resistance, creep resistant and endurance life significantly carry It is high.

In the utility model, location lug set uses the frustum cone structure of two different tapers, and outside the smaller round platform of taper The annular bonding agent conduit of side setting, the round platform of different tapers, which is conducive to distinguish when mounted, cuts plumage side and near coal-mine side.Location lug It is placed in the locating slot of shield duct piece, tenon set in position additionally uses bonding agent with shield duct piece and connect, with tapered round platform knot Structure increases the contact area of both sides, keeps connection more secured with tapered positioning slot structure.Location lug set is divided into compared with conelet The round platform of the round platform of degree and larger taper, the round platform of larger taper are designed to the lateral surface of two different tapers again, in this way can be with Disperse stress, prevents stress from concentrating and bringing fracture.It is embedded with a circle steel bushing in location lug set, further enhances location lug The intensity of set prevents its fracture, improves the protection that bolt is connected to arc.

The utility model has abandoned the complicated shield duct piece design for using locating bar or concave-convex tongue-and-groove in the prior art, in shield Structure section of jurisdiction side（Joint face）The position of prefabricated positioning groove, installs location lug set between two panels section of jurisdiction additional for installing limit, Arc connection bolt can be effectively protected while ensure that section of jurisdiction construction assembling spacing requirement again, punching block is made to design processing technology Steel bushing insertion production is also added inside location lug set, pipe sheet assembling cyclization construction quality is effectively ensured for optimization.

Location lug set in the utility model is made of injection molding manner, product high mechanical strength, because of its crystallinity Height, therefore its rigidity, heat resistance are all higher, can meet the requirement of shield-tunneling construction well, and design a mould four, in location lug Set is internal to add steel bushing, and the injection molding production technology of dual reinforcement, production is efficient, significantly reduces fabrication cycle and cost.This Utility model method is simple, reasonable science, and when making is internally embedded the location lug set of steel bushing, and indices can be obviously improved, Pipe sheet assembling positioning and effective protection connection bolt is effectively ensured；Same this method can be widely used for various construction class nylon guidees Production, improve subsequent construction quality, performance and service life.

Description of the drawings

Fig. 1-1 is in background technology using the shield duct piece schematic diagram of concave-convex tongue-and-groove；

Fig. 1-2 is A direction views in Fig. 1-1；

Fig. 2-1 is the shield duct piece schematic diagram that locating bar is used in background technology；

Fig. 2-2 is A direction views in Fig. 2-1；

Fig. 3-1 is the schematic diagram of shield duct piece in the utility model；

Fig. 3-2 is shield duct piece inside cambered surface schematic diagram in the utility model；

Fig. 4 is the connection diagram that arch screw bolt shapes plug, positions mold insert in mould for shielding pipe piece in the utility model；

Fig. 5-1 is the cover half schematic diagram of location lug mold in the utility model（Including cavity, sliding block push plate, mandril, leading Column, bottom plate, limited block etc.）；

Fig. 5-2 is the dynamic model of location lug mold in the utility model（Cavity plate）（Including cavity, inclined guide pillar, guide sleeve, bottom Plate, limited block etc.）；

Fig. 6-1 is the sectional view that location lug covers in the utility model；

Fig. 6-2 is the stereogram that location lug covers in the utility model；

Fig. 6-3 is the sectional view that location lug covers in the utility model；

Fig. 6-4 is the side view that location lug covers in the utility model；

Fig. 6-5 is sectional view along A-A in Fig. 6-4；

Fig. 6-6 is the stereogram that location lug covers in the utility model；

In figure：The connecting cavity of 1 location lug set, the steel bushing in 2 location lugs set, 3 annular bonding agent conduits, 4 tapers are smaller The inside conical surface in the larger round platform of the outside conical surface, 7 tapers in the larger round platform of the larger round platform of round platform, 5 tapers, 6 tapers, The cylinder chamber at 8 location lugs set middle part, the tubaeform chamber of 9 location lugs set both sides, 10 arc link bolt hole, the installation of 11 bolts are heavy Hole, 12 round positioning grooves, 13 annular elongated hole-shape positioning grooves, 14 arch screw bolts forming plug, 15 positioning mold inserts, 16 section of jurisdiction moulds Has side form, 17 arcs connect bolt.

Specific implementation mode

The utility model feature and other correlated characteristics are described further below in conjunction with attached drawing.

As shown in Fig. 6-1 to 6-6, a kind of shield segment assembling location lug set is identical by two bottom surfaces and overlap connection Round platform constitute, location lug set is internal to be embedded with steel bushing 2, and location lug set is axially arranged with connecting cavity 1, connecting cavity by middle part cylinder chamber 8 and both sides tubaeform chamber 9 constitute.

The taper of two round platforms is different, and one of round platform lateral surface is equipped with several annular bonding agent conduits 3, annular bonding Agent conduit is arranged round platform 4 lateral surface smaller in taper, the larger round platform 5 of another taper, lateral surface by the outside conical surface 6, The inside conical surface 7 is constituted, and the taper of the inside conical surface is more than the taper of the outside conical surface.

The location lug covers injection molding, including following each component is prepared：Polyhexamethylene adipamide, synergistic fire retardant （Zinc borate）, expansion type flame retardant, compatilizer, glass fibre, the mass percent of each component is：Polyhexamethylene adipamide 60%, Synergistic fire retardant 13%, expansion type flame retardant 3%, compatilizer 2%, glass fibre 22%.

In location lug set, whole length 91mm, the shared basal diameter of two round platforms is 86.8mm；The smaller round platform of taper The length of 4, end face diameter 75.8mm, round platform 4 are 45.5mm；The end face of the larger round platform 5 of taper, the outside conical surface 6 is straight Diameter is 75.8mm, which is 35.5mm, and the minimum diameter of the inside conical surface 7 is 82.8mm, which is 10mm；Connection In chamber, the internal diameter of cylinder chamber 8 is 51.8mm, and the depth of cylinder chamber is 61mm, and the maximum inner diameter of horn chamber is 54.9mm, horn chamber Depth be 15mm.It is optimum state, location lug that location lug set under the size, which connects section of jurisdiction and connect the protection of bolt, Cover too small, protection is inadequate, and location lug set is excessive, increases production cost and transportation cost.

As shown in Fig. 3-1,3-2, when shield duct piece designs, the Design Orientation groove at joint face, the section of jurisdiction sides Qie Yu are circle Shape positioning groove 12 is fixed convenient for positioning sleeve installation, and near coal-mine side is circumferential slot hole positioning groove 13, is positioned convenient for assembled adjustment, The positioning groove of the junction of i.e. two neighboring shield duct piece, one of joint face is circle 12, another joint face is determined Position groove elongated hole-shape 13 in a ring.As shown in figure 4, arch screw bolt is arranged in mould for shielding pipe piece shapes plug 14, positioning edge Part 15, arch screw bolt forming plug one end are connect with mold core, and the other end is connect with positioning mold insert, and positioning mold insert is installed by bolt In in the location hole of segment die side form 16, positioning mold insert is internally provided with vestibule；After shield duct piece is made, remove arch screw bolt at Shape plug forms link bolt hole, removes positioning mold insert, forms positioning groove.

Positioning nylon tenon Analysis of Nested Design considers positioning sleeve work progress stress, when pipe sheet assembling between section of jurisdiction and section of jurisdiction there are Certain shearing force is to ensure positioning sleeve intensity, and material selection enhances nylon；First the fixation of assembly side is set location lug set using surface Count out storage bonding agent conduit 3, be effectively kept bonding agent reinforce it is firm with shield duct piece.Specific practice is as follows：

1. making mold, design taper cut-off rule is die parting line, by four cavities of uniformly arranging from top to bottom；

2. poly- adipoyl hexamethylene diamine, glass fibre are put into 110 DEG C of vacuum drying chamber and are dried in vacuo, after the completion Synergistic fire retardant, expansion type flame retardant, compatilizer is added uniformly to be mixed；

3. installing location lug mold in screw injection molding machine, adjustment screw barrel temperature：Back segment temperature is 260-300 DEG C, stage casing temperature be 265-295 DEG C, front-end temperature is 260-290 DEG C, nozzle temperature be 250-270 DEG C, mold temperature 30- 80 DEG C, injection pressure 75-130MPa, screw speed 70-110r/min, location lug set is finally made in a mould four.

Notice that shield duct piece is near coal-mine when pipe sheet assembling and cut plumage direction, when section of jurisdiction cyclization is assembled, in the annular of location lug set Bonding agent is added in bonding agent conduit, one end of location lug cuff bonding agent is screwed in the round positioning groove of shield duct piece, Assembled next piece of shield duct piece after the completion；Next piece of section of jurisdiction allows location lug set by the tangential direction rotation of location lug set center line The other end slowly enter in the block section of jurisdiction annular elongated hole-shape positioning groove；After the completion, two are passed through using arc connection bolt 17 The connecting cavity of arc link bolt hole and the location lug set of a shield duct piece, adjacent two pieces of shield duct pieces are bolted It is fixed, also effective protection arc connection bolt while location lug is sleeved on positioning；It is circumferential assembled with hold it is identical to assembling method, It has to, using annular elongated hole-shape positioning groove adjustment good position, then cover cutting for center line along location lug when shield segment assembling Line direction allows location lug set to enter in next piece of section of jurisdiction positioning groove, carries out successively assembled.

Location lug set notes also when preparing：

1. location lug mold designs tapered cut-off rule as die parting line, uniformly four cavities of arrangement are pressed from top to bottom, One mould four, and location lug surface conduit, dynamic model are shaped and molded using slide block movement（Cavity plate）For whole circular cone cavity.Such as figure 5-1 is cover half（Including cavity, sliding block push plate, mandril, guide post, bottom plate, limited block etc.）, Fig. 5-2 is dynamic model（Cavity plate）（Including type Chamber, inclined guide pillar, guide sleeve, bottom plate, limited block etc.）.

2. location lug mold is mounted in screw injection molding machine, adjustment mold clamping force, opening speed, opening stroke etc..Lock Mould：Quickly → middling speed → low pressure → high pressure, fast mode locking fast speed, when using general quick, speed is set to 55-75%, pressure Power is set in 50-75%, and position section presses the length dimension of location lug, to mold the 1/3 of width.Middling speed section, after quick fraction It is converted into middling speed, the position of middling speed is usually to be closed until one piece to template, and specific length should regard template plate interval, speed one As be arranged between 30%-50%, pressure is then between 20%-45%.Low pressure is set, and low speed setting is usually a flash in template contacts Between, specific location is just located at subject to the number in a flash that board display screen is shown, using this point as standard, i.e., in putting then this not High pressure, higher than this point it is then big, play high pressure easily；The speed of setting is usually 15%-25%, depending on depending on different machines, pressure one As be set in 1-2%, some machines can then be set to 5-15%, and depend on different machines different.High pressure set, the board by and Speech, locations of high pressure board have all set in manufacture, comparatively, cannot at will change, for example the male machine of shake exists 50P, speed relatively low pressure is slightly higher, about in 30-35% or so, and depending on pressure then depends on mold, can value be in 55-85% It can.

3. melten gel uses middling speed, be set as 45%-75%, melten gel it is important simultaneously be back pressure use, Product Precision wants Ask bigger, the use of back pressure then bigger, structure is closer between back pressure can make raw molecule, and then size is more steady for the product molded Fixed, appearance is better.But back pressure is too big, then will produce salivation, so the use of back pressure fully considers formed product；Melten gel process is another One important link is exactly that pine moves back, and pine moves back a point preceding pine and moves back to move back with rear pine, it acts as preventing from salivating and reel off raw silk from cocoons, set point speed And pressure, all between 20%-50%, for the stroke of setting generally between 2-5cm, too long of stroke may make storage inside barrel empty Gas can cause next mould to will appear more bubble.

4. carry out cast filling after the completion of colloidal sol, injection time when filling, the dwell time, cooling time is according to mold temperature It is adjusted.

5. product is then there are one the process molded after cooling and shaping, die sinking is substantially the inverse process die sinkings of molding Latter end is then there are one being arranged at a slow speed, after the completion of die sinking, process that product must eject：

1）Before top:Qian Fenliangge classes are pushed up, the first stage is divided into middle pressure at a slow speed, is that product is gently ejected a part, Followed by middle pressure middling speed top, middle pressure middling speed is generally referred to as 35%-55%, and low speed is then possible to as low as 5%, and ejection stroke is set It is that ejection length is slightly bigger 1-2cm than product vertical depth；Mandril rollback includes two processes and the process basic one of roof fall It causing, the space of 1-3cm should be reserved by pushing up the terminal moved back, to protect thimble oil pipe not to be damaged, the ejection of thimble mode single；

2）Material path part is trimmed after ejection, when trimming notices that trimming prevents product the defect caused by trimming.

6. nylon location lug set is internal plus steel bushing, steel bushing of first sizing out positions steel bushing after die sinking when injection molding It in cavity, then molds, pays attention to adjustment shot after steel bushing is added, prevent that overlap is closed in excessive salivation.

7., need to be by nylon because interiors of products residual stress need to be eliminated and use in wet area after the completion of nylon location lug set Tenon set carries out heat treatment and damping moisture absorption processing, and packaging is shipped to construction site after nylon location lug set completes.

Claims (4)

1. a kind of shield segment assembling location lug set, characterized in that the location lug set is identical by two bottom surfaces and overlaps connection Round platform constitute, the taper of two round platforms is different, and location lug set is axially arranged with connecting cavity（1）, the location lug set is internal to be embedded with Steel bushing（2）.

2. a kind of shield segment assembling location lug set according to claim 1, characterized in that one of round platform lateral surface Equipped with several annular bonding agent conduits（3）.

3. a kind of shield segment assembling location lug set according to claim 2, characterized in that the annular bonding agent conduit The round platform smaller in taper is set（4）Lateral surface, the larger round platform of another taper（5）, lateral surface is by the outside conical surface（6）、 The inside conical surface（7）It constitutes, the taper of the inside conical surface is more than the taper of the outside conical surface.

4. a kind of shield segment assembling location lug set according to claim 1, characterized in that the location lug covers connecting cavity By the cylinder chamber at middle part（8）With the tubaeform chamber of both sides（9）It constitutes.