CN109653195A

CN109653195A - A kind of mechanical splice

Info

Publication number: CN109653195A
Application number: CN201910020327.8A
Authority: CN
Inventors: 袁雪峰
Original assignee: Individual
Current assignee: Tianhai Steel Bar Zhangjiagang Co ltd
Priority date: 2019-01-09
Filing date: 2019-01-09
Publication date: 2019-04-19

Abstract

The invention discloses a kind of mechanical splices, including connecting kelly, accommodate limit sleeve, key, spring and plug, it accommodates and is equipped with accommodation space inside limit sleeve, the inner wall for accommodating limit sleeve is equipped with sliding slot, the direction of sliding slot is parallel with the axis direction of limit sleeve is accommodated, there is guiding sliding surface close to connection kelly insertion side in sliding slot, key and spring are placed in sliding slot, key is equipped with the first sliding surface with guiding sliding face contact, the first card access surface contacted with connection kelly and the first end face contacted with spring, it connects kelly and key contact position is the second card access surface, plug, which is placed in, accommodates one end opposite with connection kelly insertion side on limit sleeve, spring one end is abutted with key, the other end is abutted with plug, connection kelly can be inserted into accommodation space and key is pushed between guiding sliding surface and the second card access surface by recoil of spring Realize that connection kelly is connect with limit sleeve is accommodated, the mechanical splice is convenient with grafting, the reliable advantage of switching performance.

Description

A kind of mechanical splice

Technical field

The present invention relates to a kind of concrete component connection structures, and in particular to a kind of mechanical splice.

Background technique

In construction, the docking of precast concrete main reinforcement is essential process, conventional concrete stake docking Mode is the welding of steel plate, and steel part is exposed, causes the problem of corrosion resistance difference, and not can solve and seal between spliced pile head The problem of, while the docking of existing building industry requirement precast concrete main reinforcement requires quickly, securely, and use welding manner It can not achieve the requirement.

In the prior art, for the ease of can be realized the quick connection of precast concrete pile, usually in precast concrete pile Both ends are equipped with mechanical splice, are as shown in figure 27 a kind of mechanical splice disclosed in the prior art prior art, including connection card Bar 1 accommodates limit sleeve 2, intermediate nut 9, key 3 and spring 4, and the connection kelly that intermediate nut is mounted on receiving limit sleeve is inserted Enter end, the side far from connection kelly insertion end is equipped with sliding surface in intermediate nut, and connection kelly is equipped with card access surface, and key is The ring structure being made of the latch of multiple fissions, key and spring, which are placed in, to be accommodated in limit sleeve, passes through centre in connection kelly When nut insertion is accommodated in limit sleeve, spring can push key to enter between sliding surface and card access surface, to realize connection card Bar and the connection for accommodating limit sleeve.

Existing mechanical splice has the following problems, as shown in figure 27, connects kelly in order to prevent and accommodates limit inserting The phenomenon of existing skew is picked out, connection kelly is equipped with the first circular conical surface 92, and intermediate nut is equipped with the second circular conical surface 90, connection card After bar and receiving limit sleeve grafting, the first circular conical surface and the second circular conical surface are matched to be corrected to grafting, avoid connection card There is crooked phenomenon in both bar and receiving limit sleeve.However, as shown in Figure 27 and Figure 28 a, due to the first circular conical surface and the second circle The length of the conical surface is longer so that connection kelly during insertion, between the first circular conical surface and the second circular conical surface can exist compared with Big gap, the central axis x-x and central axis y-y for accommodating limit sleeve that will lead to connection kelly is not coaxial, outer when applying Power makes to connect kelly to during accommodating limit sleeve grafting, key elder generation and Plug contact close to connection card rod axis side, and With Plug contact after key far from plug connector axis side, in Figure 27, the key of downside is first with Plug contact and slotting Compressed spring under the action of head, after the key of upside with Plug contact, accordingly, it is possible to two kinds of situations, the first feelings occur Condition, as shown in figure 28 a, during connecting kelly insertion, there are two fortune for tool under the promotion of connection kelly for the key of downside Dynamic, one is moving (downward side direction movement in figure) far from central axis direction in the radial direction along receiving limit sleeve, another A edge accommodates guide sleeve axial direction compressed spring (side direction moves to the right in figure), and the key of upside is in the beginning rank of grafting Duan Buhui with connection kelly contact, cause the key deflection of two sides so that spring two sides unbalance stress and occur skewed State, when plug is further inserted into, as shown in figure 28 a, due to smaller with the inner wall spacing of receiving limit sleeve on the downside of plug, because Key on the downside of this further compressed spring and can limit the company of cannot be introduced by plug ends always under the promotion of plug It connects between kelly and intermediate nut, and it is larger with the inner wall spacing of receiving limit sleeve on the upside of plug, therefore the key of upside is in bullet It is introduced under the promotion of spring between connection kelly and intermediate nut, when removing external force, the work of key and connection kelly in spring With lower rebound, since the key of upside has entered between connection kelly and intermediate nut, and the key of downside does not enter connection card Between bar and intermediate nut, therefore it will cause and be not connected firmly by even connection failure.Second situation, as shown in figure 27, due to Connect kelly and accommodate the axis of limit sleeve there are deviation, when connecting kelly insertion, the key of downside first with Plug contact simultaneously And compressed spring under the action of plug, with Plug contact after the key of upside, in the stage that is initially inserted into, the key of lower end is squeezed Spring causes spring to tilt (state of spring in Figure 28 a), and the key that inclined spring will push upside is introduced into connection kelly Between intermediate nut and it is inserted into biggish depth, as depicted in fig. 28b, during connection kelly continues into, spring can be pushed away Remaining key is moved to enter between connection kelly and intermediate nut, still, the key entered afterwards and the clamping position for connecting kelly Be at the different location of plug with the key that is introduced into the position for connecting kelly clamping, the depth that the wedge card insertion of upside enters compared with Greatly, the depth that the wedge card insertion of downside enters is smaller, at this point, the key stress of downside, and the key of upside does not stress, and therefore, can make It is reduced at the extraction-resistant behavior of the mechanical splice.

Summary of the invention

The it is proposed of the present invention in view of the above problems, and a kind of mechanical splice of researching and designing, the technological means that the present invention uses It is as follows:

A kind of mechanical splice, including connection kelly, receiving limit sleeve, key, spring and plug；The receiving limit sleeve one End is connection kelly insertion end, and the other end is plug fixing end, is equipped with inside the receiving limit sleeve for being inserted into connection kelly Accommodation space, the inner wall for accommodating limit sleeve is equipped with more than one sliding slot, inserted in the sliding slot close to connection kelly Enter the guiding sliding surface that end has taper；The key and spring are placed in the sliding slot, and the key is equipped with to be slided with guiding First sliding surface of dynamic face contact, the first card access surface contacted with connection kelly and the first end face contacted with spring, it is described It connects kelly and key contact position is the second card access surface, the plug is placed in the plug fixing end for accommodating limit sleeve, the spring One end is abutted with key, and the other end is abutted with plug, and the connection kelly can be inserted into accommodation space and pass through recoil of spring for wedge Between piece push-in guiding sliding surface and the second card access surface and then realize that connection kelly is connect with limit sleeve is accommodated.

Further, the connection kelly includes the guide part of pedestal, plug and the connection pedestal and plug, described to insert The second transition face of taper is equipped between head and guide part, the internal diameter of the connection kelly insertion end for accommodating limit sleeve is equipped with First inclined-plane of taper, when connecting kelly insertion receiving limit sleeve, second transition face is abutted with the first inclined-plane.

Further, the connection kelly further includes the guide part for connecting pedestal and plug, the plug and guide part it Between be equipped with taper the second transition face, it is described accommodate limit sleeve connection kelly insertion end internal diameter be equipped with taper first tiltedly Face, when connecting kelly insertion receiving limit sleeve, second transition face is abutted with the first inclined-plane.

Further, the inner wall of the accommodation space is equipped with the first internal screw thread.

Further, the accommodation space includes directed cavity and plug correction chamber, and the directed cavity is set to connection kelly and inserts Enter and hold side, the internal diameter of the plug correction chamber is less than the internal diameter of directed cavity, is equipped between the directed cavity and plug correction chamber First Transition face, the inner wall of the directed cavity are equipped with the second internal screw thread, and the connection kelly includes pedestal, plug and connection bottom The guide part of seat and plug is equipped with the second transition face of taper between the plug and guide part, when connection kelly insertion accommodates When limit sleeve, second transition face is abutted with First Transition face.

Further, at least one face in first card access surface, the second card access surface, the first sliding surface and guiding sliding surface On be machined with anti-skid structure.

Further, the anti-skid structure is taper thread or latch.

Further, first card access surface is conical surface or elliptic conic shape face, in the plugged state, first card Junction and the second card access surface are face contact, solid wire contact or single-contact, and first sliding surface and guiding sliding surface are two The contact of root line or face contact.

Further, the first external screw thread is provided on the outer wall for accommodating limit sleeve.

A kind of precast concrete pile, including location nut and mechanical splice disclosed by the invention, the location nut and appearance Limit sleeve of receiving is individually fixed in the both ends of precast concrete pile, and one end of the location nut and the main reinforcement of pre-value concrete-pile connect It connects, the other end and the connection kelly connect, and different precast concrete piles can be connected with each other by the mechanical splice.

A kind of precast concrete pile, including first end plate, the second end plate and mechanical splice disclosed by the invention, described first End plate and the second end plate are separately fixed at the both ends of precast concrete pile, are equipped with receiving on the first end plate and the second end plate Limit sleeve fixation hole, main reinforcement fixation hole and connection kelly fixation hole, the connection kelly are mounted on the connection kelly of first end plate In fixation hole, the receiving limit sleeve is threaded in the receiving limit sleeve fixation hole of the second end plate, the precast concrete The main reinforcement of stake is mounted in main ribs fixation hole, and different precast concrete piles can be connected with each other by the mechanical splice.

Compared with the prior art, mechanical splice of the present invention has the advantages that the 1, mechanical splice includes Connect kelly, accommodate limit sleeve, key, spring and plug, accommodate limit sleeve inner wall and be equipped with sliding slot, be equipped in sliding slot key and Spring realizes the quick connection of precast concrete pile so that connection kelly can be convenient accurately insertion and accommodate in limit sleeve；2, First card access surface is conical surface or elliptic conic shape face, and in the plugged state, first card access surface and the second card access surface are face Contact, solid wire contact or single-contact, first sliding surface is contacted with guiding sliding surface for both threads or face contact, so that The inside and outside stress of key not can be concentrated on a point, avoids deforming and damaging caused by excessively concentrating because of stress, improve entire The extraction-resistant behavior of mechanical splice；3, the second transition face for being equipped with taper between the plug and guide part of kelly is connected, limit is accommodated The internal diameter of the connection kelly insertion end of set is equipped with the first inclined-plane of taper, when connecting kelly insertion receiving limit sleeve, second Transition face is abutted with the first inclined-plane, and the first inclined-plane has downlink limit function to connection kelly, is avoided connection kelly from crossing insertion, is made Gap is generated at concrete-pile；4, it is oriented at least one face of sliding surface, the first card access surface, the second card access surface and the first sliding surface On be provided with anti-skid structure, the stronger of mechanical splice grafting can be made, improve the extraction-resistant behavior of concrete-pile；5, it accommodates The internal diameter of the plug correction chamber in space is less than the internal diameter of directed cavity, so that plug corrects chamber pair in connection kelly insertion process Connection kelly is corrected, and guarantees the accuracy of grafting.

Detailed description of the invention

Fig. 1 a is the first structure chart of mechanical splice disclosed by the invention；

Fig. 1 b is cross-sectional view at A-A in Fig. 1 a；

Fig. 2 a is the structure chart of the receiving limit sleeve of the first mechanical splice；

Fig. 2 b is the right view of Fig. 2 a；

Fig. 2 c is the left view of Fig. 2 a；

Fig. 3 is the structure chart for connecting kelly；

Fig. 4 a is the structure chart of plug；

Fig. 4 b is the right view of Fig. 4 a；

Fig. 5 a is the structure chart of spring；

Fig. 5 b is the top view of Fig. 5 a；

Fig. 6 a is the structure chart of key；

Fig. 6 b is sectional view at B-B in Fig. 6 a；

Fig. 7 is the schematic diagram connected when kelly just starts to contact with key；

Fig. 8 a is the schematic diagram that the first card access surface has taper thread；

Fig. 8 b is the enlarged drawing in Fig. 8 a at C；

Fig. 9 a is the structure chart of the connection kelly with taper thread structure；

Fig. 9 b is enlarged drawing at D in Fig. 9 a；

Figure 10 a is when all having taper thread in the first card access surface and the second card access surface, and key enters slide-and-guide face and the Schematic diagram when two card access surfaces, at this point, the tooth top of the taper thread of the first card access surface and the second card access surface mutually abuts；

Figure 10 b be Figure 10 a in when key with connect kelly clamping after schematic diagram, at this point, key be oriented to sliding surface it Between generate gap；

Figure 10 c be only in the second card access surface have taper thread when, key with connect kelly be clamped schematic diagram；

Figure 11 a is the structure chart for being oriented to sliding surface and being equipped with latch；

Figure 11 b is enlarged drawing at K in Figure 11 a；

When Figure 11 c is that guiding sliding surface is equipped with latch, the interactively of key and guiding sliding surface；

Figure 11 d is the schematic diagram on the first sliding surface with latch；

Figure 11 e is the enlarged drawing in Figure 11 d at P；

When Figure 11 f is that the first sliding surface is equipped with latch, the interactively of the first sliding surface and guiding sliding surface；

Figure 12 a be wedge card the first card access surface taper it is identical as the second card access surface taper of connection guide when, wedge card with Connect the clamping schematic diagram of kelly；

Figure 12 b is the first card access surface when being tapered surface or elliptic conic shape face connection kelly, key and accommodate guide sleeve Force analysis figure；

Figure 12 c is the enlarged drawing in Figure 12 b in dotted portion frame；

Figure 13 is the structure chart of second of mechanical splice disclosed by the invention；

Figure 14 a is the structure chart of the receiving limit sleeve of the mechanical splice of second of structure；

Figure 14 b is the right view of Figure 14 a；

Figure 14 c is the left view of Figure 14 a；

Figure 15 is the structure chart that kelly is connected in second of mechanical splice；

Figure 16 is the schematic diagram that the mechanical splice with second of structure is used to connect prestressed-concrete pile；

Figure 17 is the mechanical splice with second of structure for connecting prestressed-concrete pile and non-prestressed concrete The schematic diagram of stake；

Figure 18 is the schematic diagram that the mechanical splice with second of structure is used to connect non-prestressed concrete stake；

Figure 19 is the structure chart of the third mechanical splice disclosed by the invention；

Figure 20 a is the structure chart of the receiving limit sleeve of the mechanical splice of the third structure；

Figure 20 b is the right view of Figure 20 a；

Figure 20 c is the left view of Figure 20 a；

Figure 21 is the structure chart that kelly is connected in the third mechanical splice；

Figure 22 a is the structure chart of the receiving limit sleeve of the mechanical splice of the 4th kind of structure；

Figure 22 b is that the mechanical splice of the 5th kind of structure increases reinforcing bar on plug that is, on the basis of the 4th kind of mechanical splice Fixation hole；

Figure 23 is the precast concrete pile of the mechanical splice with the 4th kind of structure；

Figure 24 is that H goes out enlarged drawing in Figure 23；

Figure 25 is the structure chart of end plate；

Figure 26 is the precast concrete pile with the mechanical splice of structure in the 5th；

Figure 27 is the structure chart of the mechanical splice of the prior art；

Figure 28 a is the central axis for connecting kelly and intermediate nut of the mechanical splice of the prior art there are when deviation, is connected Kelly is connect to cause part key to cannot be introduced into intermediate nut and connect the schematic diagram between kelly；

Figure 28 b be the mechanical splice of the prior art connection kelly and intermediate nut central axis there are when deviation, wedge After piece enters connection kelly and intermediate nut, the schematic diagrames different from the clamping position of connection kelly of multiple keies；

Figure 29 is when being equipped with the precast concrete pile end of the mechanical splice of the prior art to tilt, and concrete-pile is inserted The schematic diagram connect；

Figure 30 be the prior art mechanical splice occurred during grafting insertion schematic diagram, that is, in Figure 29 on Schematic diagram when the mechanical splice grafting of side；

Figure 31 is the schematic diagram in Figure 30 after mechanical splice clamping.

In figure: 1, connection kelly, the 10, second card access surface, 11, taper thread, 12, pedestal, 13, plug, 14, guide part, 15, the second transition face, 16, plug guide surface, 17, arc-shaped transitional surface, 2, receiving limit sleeve, 20, accommodation space, 21, sliding slot, 22, sliding surface, 23, directed cavity, 24, plug correction chamber, 25, First Transition face, 26, connection kelly insertion end, 27, plug are oriented to Fixing end, the 28, first inclined-plane, 29, plug installation cavity, 201 first internal screw threads, the 202, second internal screw thread, the 203, first external screw thread, 3, key, the 30, first sliding surface, the 31, first card access surface, 32, first end face, the 33, first guide surface, 34, the outside of key Face, 4, spring, 40, spring-loaded pawl, 5, plug, 50, steel holding holes, 51, clamping part, 70, main reinforcement, 71, location nut, 80, First end plate, the 81, second end plate, 82, accommodate limit sleeve fixation hole, 83, connection kelly fixation hole, 84, main reinforcement fixation hole, 9, in Between nut, the 90, second circular conical surface, the 92, first circular conical surface.

Specific embodiment

As illustrated in figs. 1A and ib it is the first structure of mechanical splice disclosed by the invention, including connection kelly 1, accommodates Limit sleeve 2, key 3, spring 4 and plug 5.As shown in Fig. 2 a, Fig. 2 b and Fig. 2 c, described 2 one end of receiving limit sleeve is connection card Bar insertion end 26, the other end are plug fixing end 27, described to accommodate the appearance being equipped with inside limit sleeve 2 for being inserted into connection kelly 1 Receive space 20, the inner wall for accommodating limit sleeve 2 is equipped with the sliding slot 21 of more than one (including one), sliding in the present embodiment The quantity of slot is 3, and sliding slot 21 is circumferentially uniformly distributed on the inner wall for accommodating limit sleeve 2, and the section of sliding slot is sector structure, preferably Ground, the direction of the sliding slot 21 is parallel with the axis direction of limit sleeve 2 is accommodated, close to connection kelly insertion side in the sliding slot 21 Guiding sliding surface 22 with taper, guiding sliding surface and the angle a for the inner wall that guide sleeve is accommodated in sliding slot are greater than 90 °, preferably Ground, guiding sliding surface and the angle a for the inner wall that guide sleeve is accommodated in sliding slot are more than or equal to 135 °, and the plug for accommodating limit sleeve 2 is solid Fixed end 27 is equipped with plug installation cavity 29.The key 3 and spring 4 are placed in sliding slot 21, as shown in figure 5 a and 5b, in this reality It applies in example, spring is the spring for the strip being bent to form by spring wire, and the length direction along spring is seen, there are two spring tools Outward spring-loaded pawl 40, when spring is placed in sliding slot, spring-loaded pawl 40 can be contacted with the two sides inner wall of sliding slot, Spring is avoided to skid off from sliding slot, spring 4 is also possible to the elastic construction formed by combinations of materials such as spring wire and rubber.Such as figure Shown in 6a and Fig. 6 b, the key 3 is equipped with the first sliding surface 30 contacted with guiding sliding surface 22, contacts with connection kelly 1 The first card access surface 31 and the first end face 32 that is contacted with spring 4, in the present embodiment, key 3 include the first sliding surface 30, Lateral surface 34, first end face 32, the first card access surface 31 and the first guide surface 33 of key, first sliding surface 30, key It is pentagonal configuration that lateral surface 34, first end face 32, the first card access surface 31 and the first guide surface 33, which are sequentially connected and surround cross section,. As shown in figure 3, connection kelly 1 includes pedestal 12 and plug 13, the pedestal 12 is equipped with external screw thread, the connection kelly 1 and 3 contact position of key is the second card access surface 10, and the plug 5 is installed in plug lock chamber 29, in the present embodiment, such as Fig. 4 a and Shown in Fig. 4 b, plug is cylindrical structure, and external screw thread is machined on the outer diameter of plug, is machined with internal screw thread in plug lock chamber, Plug is threaded in plug lock chamber, and for the ease of installation, plug is equipped with clamp structure, in the present embodiment, clamping Structure is two holding holes, and clamp structure is also possible to the boss structure of polygon.Described 4 one end of spring and the first of key 3 End face 32 abuts, and the other end is abutted with plug 5, and the connection kelly 1 can be inserted into accommodation space 20 and will by the rebound of spring 4 Between the push-in of key 3 guiding sliding surface 22 and the second card access surface 10 and then realizes connection kelly and accommodate the connection of limit sleeve.

The mechanical splice course of work disclosed by the invention is as follows, when connection kelly receive calmly positioning sleeve connection kelly insertion When end insertion is accommodated in positioning sleeve, the plug for connecting kelly contacts with key and pushes key along the guiding sliding surface in sliding slot Sliding, when key is moved along guiding sliding surface comprising it is moved along radial and axial two kind for accommodating guide sleeve, key Radial motion enters in the space that key surrounds so that the internal diameter between multiple keies increases in order to connect the plug of kelly, The axial movement of key, so that key compressed spring, enables spring that key is pushed to enter the guiding sliding for accommodating guide sleeve Between face and the second card access surface for connecting kelly and then realizes connection kelly and accommodate the connection of limit sleeve.Machine disclosed by the invention Tool connector, due to being machined with sliding slot on accommodating limit sleeve, key and spring are placed in sliding slot, so that accommodating the minimum of limit sleeve Gap Z2 between internal diameter and the maximum outside diameter of plug (under normal circumstances, accommodates the minimum diameter of limit sleeve and the maximum of plug Gap between outer diameter is 0.1mm to 0.3mm) much smaller than between the outer diameter of internal diameter and plug for accommodating guide sleeve in the prior art Gap Z3, can to avoid connection card bar and accommodate limit sleeve axis runout it is excessive and to occur in the prior art part key first Into guiding sliding surface and the second card access surface between, and part key due to plug barrier effect and cannot be introduced into guiding sliding Between face and the second card access surface, so that there is the problem of grafting failure, simultaneously as multiple sliding slots are mutually indepedent, so that each The movement of wedge card and spring in sliding slot is also relatively independent, will not interfere with each other, and ensure that the reliability of grafting.

It can be the end of truncated cone-shaped, billiard table shape in the end of the plug 13 of connection kelly disclosed by the invention, it is preferable that Plug includes the second card access surface 10, plug guide surface 16 and arc-shaped transitional surface 17, and second card access surface 10 and plug are oriented to Face 16 is taper face, and the bigger diameter end of two taper faces is connected by arc-shaped arc-shaped transitional surface.As shown in fig. 7, working as this kind The plug of structure is when insertion accommodates in limit sleeve, first the first guide face contacts with key of plug guide surface meeting, plug guiding Play the role of guiding in face of the first guide surface in order to which key can smoothly enter guiding sliding under the action of the spring Between face and the second card access surface, it is preferable that plug guide surface and the first guide face contacts position are the midline position in two faces, can Sliding cutting is carried out to mutual contact surface to avoid the wedge angle edge of key or plug, causes the abrasion of working face.

It further, can be in first card access surface 31 and the second clamping as shown in Fig. 8 a, Fig. 8 b, Fig. 9 a and Fig. 9 b The anti-skid structures such as taper thread 11 or latch are provided on face 10, for the ease of processing to reduce cost priority selection taper thread, After precast concrete pile is connected by mechanical splice, outside pulling capacity can be generated between concrete-pile, key is slided in guiding Under the action of dynamic face, key can generate opposite sliding with kelly is connect, therefore can reduce the withdrawal resistance of mechanical splice, and the Anti-skid structure is set in one card access surface and the second card access surface, key can be increased and connects the resistance to sliding between kelly, that is, is mentioned The high withdrawal resistance of mechanical splice.

Further, taper thread 11 or latch are only processed in the second card access surface.As shown in Figure 10 a, when the first card access surface When with all having taper thread (latch) in the second card access surface, after key enters guiding sliding surface and the second card access surface, the first card The tooth top of junction and the taper thread in the second card access surface first contacts with each other, as shown in fig. lob, when connection kelly is by outside drawing When pull out force, the taper thread in the first card access surface and the second card access surface is mutually clamped, at this point, the first sliding surface of key and receiving limit The high gap Z1 of a tooth can be generated between the guiding sliding surface of position set, therefore, connection kelly is will cause and accommodates limit sleeve Be not connected firmly by and and be axially moved gap.As shown in figure l0c, spiral shell is bored to be only equipped in the second card access surface of connection kelly Therefore line enters between guiding sliding surface and the second card access surface when in key, the first sliding surface is abutted with guiding sliding surface, the One card access surface is abutted with the tooth top of the taper thread in the second card access surface, will not generate the gap in Figure 10 b, ensure that the jail of clamping Solidity energy.

Figure 11 a and Figure 11 b show the anti-skid structure that reciprocal latch structure is machined on slide-and-guide face, it is preferred that along appearance Receive limit sleeve accommodation space to accommodate limit sleeve outer diameter direction on, the tooth height of latch gradually increases, that is, such as Figure 11 c institute The tooth height of the latch shown is gradually increased beyond the height of dotted line in figure.The latch gradually increased is processed on guiding sliding surface, such as Shown in Figure 11 b and Figure 11 c, after key enters between guiding sliding surface and plug, the lateral surface of key connects with adjacent latch Touching, and then can prevent key from sliding between guiding sliding surface and plug, it ensure that the clamping of mechanical splice is secured.

Figure 11 d and Figure 11 e show the anti-skid structure that reciprocal latch structure is machined on the first sliding surface of wedge card, such as scheme Shown in 11f, after wedge card enters between guiding sliding surface and connection kelly, the front end of wedge card can partially exceed guiding sliding surface, When being machined with latch on the first sliding surface, the inner wall shape of the connection guide direction of insertion of guiding sliding surface and receiving limit sleeve At side be connected on a flank of tooth of latch, and then limit wedge card and accommodate limit sleeve relative motion, improve connection Kelly and the bonding strength for accommodating limit sleeve, and then extraction-resistant behavior is improved, in such an embodiment, it is preferable guiding sliding surface It is greater than the first sliding surface of wedge card with the angle r1 for accommodating limit sleeve central axis and accommodates the angle r2 of limit sleeve central axis, In this way, guiding sliding surface and accommodate limit sleeve connection guide direction of insertion the side that is formed of inner wall can be convenient snap onto the In latch on one sliding surface.

The foregoing describe in the first card access surface and the second card access surface, the second card access surface, guiding sliding surface and the first sliding Latch is processed on face or taper thread is used to limit wedge and is stuck in four kinds of anti-Slipped Clove Hitch for accommodating guide sleeve and connecting the movement between kelly Structure, but be not limited to above-mentioned four kinds of forms, anti-skid structure can be in the first card access surface, the second card access surface, guiding sliding surface and the It processes on one or more faces in one sliding surface, herein, no longer other form processings is described.

Since the second card access surface of connection kelly is tapered surface, when the first card access surface of wedge card is and the second card access surface taper When identical tapered surface, since wedge card and the clamping position for connecting kelly are uncertain, it is clamped in wedge card with kelly is connect When, the first card access surface and the second card access surface will not be fully mated.As figure 12 a shows, in figure Q1 to Q5 curve indicate second clamping Section radius curve at the different location of face, J curve indicates the section radius curve at a certain position of wedge card in figure, in figure Shown, when J curve is in the position Q1, J curve is bonded completely with Q1, when J curve is in Q2 to Q5, J curve and Q curve Gap gradually increase, that is to say, that when wedge card is in the different location of connection kelly, wedge card and the clamped condition for connecting kelly Difference, i.e., it cannot be guaranteed that the first card access surface is bonded completely with the second card access surface.

Preferably, the first card access surface 31 of mechanical splice disclosed by the invention is conical surface or elliptic conic shape face, is being inserted It connecing under state, first card access surface 31 and the second card access surface 10 are face contact, solid wire contacts or single-contact, described first Sliding surface 30 is contacted with guiding sliding surface 22 for both threads or face contact.

That is, as shown in Figure 12 b and Figure 12 c, when the first card access surface is cone, in the plugged state, first The diameter of card access surface is greater than the diameter of the second card access surface corresponding position, and the diameter of first sliding surface is greater than guiding sliding surface pair The diameter of position is answered, line contact is formed, at this time if the taper of the first card access surface is slightly more or less than the taper of the second card access surface, The two is then point contact；When the first card access surface is elliptic conic shape face, also to need about the symmetrical ellipse arc conical surface of short axle The first card access surface and the second card access surface for meeting the ellipse arc conical surface are that line contact or point contact specifically can be set to The diameter of second card access surface is equal to the minor axis length of the first card access surface, naturally it is also possible to be set as other values, connect as long as meeting line The requirement of touching, if the taper at this moment meeting the first card access surface is slightly more or less than the taper of the second card access surface, if the two For point contact, for guiding sliding surface and the first sliding surface, it may be possible to the both ends of the first sliding surface and guiding sliding face contact, It could also be possible that both ends slightly inside is some, determined according to the specification of elliptic arc.Due in actual production process, being difficult to control wedge Piece and guiding sliding surface and the first sliding surface be face contact, in this way since, be set as line contact, in the circumferential, key it is interior Side is intermediate stress (power F1 in figure), and the outside of key is both ends stress (the power F2 in figure), forms triangularity force structure, So that the inside and outside stress of key not can be concentrated on a point, avoids deforming and damaging caused by excessively concentrating because of stress, improve The extraction-resistant behavior of entire mechanical splice.

Meanwhile power is wrapped up in order to increase the receiving limit sleeve and embracing for concrete-pile, the outer wall for accommodating limit sleeve is preferentially selected Polygonized structure, accommodating limit sleeve outer wall in the present embodiment is dodecagon structure.

As shown in figure 13 it is second of structure of mechanical splice disclosed by the invention, including connects kelly 1, receiving limit sleeve 2, Key 3, spring 4 and plug 5.As shown in Figure 14 a, Figure 14 b and Figure 14 c, described 2 one end of receiving limit sleeve is connection kelly insertion End 26, the other end are plug fixing end 27, described to accommodate the accommodation space being equipped with inside limit sleeve 2 for being inserted into connection kelly 1 20, the inner wall for accommodating limit sleeve 2 is equipped with the sliding slot 21 of more than one (including one), in the present embodiment, the number of sliding slot Amount is 3, and sliding slot 21 is circumferentially uniformly distributed on the inner wall for accommodating limit sleeve 2, and the section of sliding slot is sector structure, it is preferable that institute The direction for stating sliding slot 21 is parallel with the axis direction of limit sleeve 2 is accommodated, and has in the sliding slot 21 close to connection kelly insertion side The guiding sliding surface 22 of taper, the plug fixing end 27 for accommodating limit sleeve 2 are equipped with plug installation cavity 29, the key 3 and spring 4 It is placed in sliding slot 21, this part-structure is identical as the first structure.The difference lies in that in this configuration, it is as shown in figure 15, described Connect the guide part 14 that kelly 1 includes pedestal 12, plug 13 and the connection pedestal 12 and plug 13, the plug 13 with lead To the second transition face 15 for being equipped with taper between portion 14, as shown in figures 14a, the connection kelly insertion end for accommodating limit sleeve 2 26 internal diameter is equipped with the first inclined-plane 28 of taper, when connecting kelly insertion and accommodating limit sleeve, second transition face 15 with First inclined-plane 28 abuts.The structure can further reduce the outer diameter of plug and accommodate the gap Z2 (receiving of limit sleeve internal diameter The minimum diameter of limit sleeve can be matched with the maximum outside diameter of plug), that is, reduce the central axis x-x of connection kelly With the possible offset distance of central axis y-y for accommodating limit sleeve, reduces and connect kelly and receiving limit sleeve in grafting process Axis offset distance (amount of exercise in the direction m-m), i.e. accommodation space plays corrective action to connection kelly, and guarantee grafting can By property.

Further, as shown in figures 14a, the inner wall of the accommodation space 20 is equipped with the first internal screw thread 201, concrete Native stake is divided into prestressed-concrete pile and non-prestressed concrete stake, and prestressed-concrete pile is needed when being poured to master Muscle applies prestressing force.In the mechanical splice of the structure, due on the inner wall of entire accommodation space for accommodating limit sleeve ontology It is all machined with the first internal screw thread 201, therefore can be connect simultaneously by bolt with the first internal screw thread 201 when concrete-pile is poured Apply prestressing force to it, then poured, can be obtained prestressed-concrete pile.Simultaneously as accommodating the inner wall of limit sleeve On be machined with the first internal screw thread, and in concrete-pile connection, need to inject epoxide-resin glues, the epoxy of injection two end faces Resin glue can be entered along the gap of the first internal screw thread to be accommodated in limit sleeve, the further connectivity for increasing mechanical splice Can, guarantee being reliably connected for concrete-pile.

As Figure 16, Figure 17 and Figure 18 are shown the mechanical splice with second of structure connects for precast concrete pile Structure chart, as shown, the pedestal 12 of connection kelly 1 is connect by external screw thread with location nut 71,71 other end of location nut It is connected with main reinforcement 70, steel holding holes 50 are provided on plug 5, main reinforcement 70 is connected on steel holding holes.Location nut and appearance Limit sleeve of receiving is separately fixed at the both ends of precast concrete pile, can quickly realize inserting for concrete-pile by the mechanical splice It connects.The pier nose chuck connecting with PC rod iron, the steel holding holes 50 on plug 5 are provided in location nut shown in Figure 16 For the pier nose chuck connecting with PC rod iron, the fast of prestressed-concrete pile and prestressed-concrete pile may be implemented with this configuration Speed connection.

The threaded hole connecting with screw-thread steel, the steel holding holes on plug 5 are provided in Figure 17 in location nut 50 also to be provided with the threaded hole connecting with screw-thread steel, the structure may be implemented with non-prestressed concrete stake with it is non-prestressed The quick grafting of concrete-pile.

The pier nose chuck connecting with PC rod iron is provided in Figure 18 in location nut, the steel holding holes 50 on plug 5 are The threaded hole connecting with screw-thread steel, which may be implemented prestressed-concrete pile and the quick of non-prestressed concrete stake inserts It connects.The structure connecting with reinforcing rib in location nut and plug, can according to need and chosen, and be not limited to described above Three kinds of situations.

When mechanical splice is connected for concrete-pile, need that circumferentially multiple machinery connect in the end of concrete-pile Head, when precast concrete pours, the case where inclination there are concrete end face and concrete-pile axis, due to connection kelly be Concrete-pile is mounted on concrete-pile end face after pouring, therefore can be by measuring the plug that can guarantee to connect kelly End is in same plane, and accommodating limit sleeve is to be cast in concrete-pile, after concrete-pile pours, accommodates the position of limit sleeve It sets and is defined.Therefore, as shown in figure 29, when the end face of concrete-pile tilts, in the figure, the stake of connection guide is installed End face is vertical with stake axis (expression passes through precise measurement, it is ensured that the end face of plug is consistent at a distance from stake end face), installation There is the stake end slope for accommodating limit sleeve, when two stakes are attached by form shown in Figure 29, upside in Figure 29 Connection kelly insertion in mechanical splice will appear the state of insertion when accommodating in limit sleeve, i.e., as shown in Figure 30, when even After connecing in kelly insertion receiving limit sleeve, connects the second card access surface on kelly and accommodate between the guiding sliding surface on limit sleeve Distance it is excessive so that the first sliding surface of key and the first card access surface can not connect with guiding sliding surface and the second card access surface simultaneously Touching, so that occurring gap (Z5 in figure) between the first card access surface and the second card access surface, that is, key can not be by connection card at this time Bar and receiving limit sleeve clamping after connection kelly insertion accommodates in limit sleeve, need outside to kelly is connected as shown in figure 31 Carry out drawing, in order to key will connect kelly and accommodate limit sleeve clamping, when will connect kelly be pulled outwardly pull out when, two dock Concrete-pile end face can generate gap Z4 of corresponding size (connection kelly be pulled outwardly the distance pulled out), cause concrete-pile to connect It is not firm.

In second of structure, the connection kelly 1 includes pedestal 12, plug 13 and the connection pedestal 12 and plug 13 guide part 14 is equipped with the second transition face 15 of taper between the plug 13 and guide part 14, the receiving limit sleeve 2 The internal diameter for connecting kelly insertion end 26 is equipped with the first inclined-plane 28 of taper, described when connecting kelly insertion receiving limit sleeve Second transition face 15 is abutted with the first inclined-plane 28.That is, when connecting in kelly insertion receiving limit sleeve, the first inclined-plane pair Connection kelly plays the role of downlink limit, can prevent connection kelly from crossing and be inserted into receiving limit sleeve and generate above-mentioned connection Guide rod crosses insertion and an end face is caused the problem of gap occur.

Further, the end of the plug of the connection kelly in the mechanical splice of the structure can be truncated cone-shaped, billiard table shape End, it is preferable that plug include the second card access surface, plug guide surface and arc-shaped transitional surface, second card access surface and insert Head guide surface is taper face, and the bigger diameter end of two taper faces is connected by arc-shaped arc-shaped transitional surface, and the of mechanical splice One card access surface is conical surface or elliptic conic shape face, and in the plugged state, first card access surface connects with the second card access surface for face Touching, solid wire contact or single-contact, first sliding surface is contacted with guiding sliding surface for both threads or face contact.First card It is provided with taper thread or latch in junction and the second card access surface, alternatively, only processing taper thread or latch in the second card access surface. These structures are identical with the first mechanical splice, are not described in detail herein.

Such as the third structure that Figure 19 is mechanical splice disclosed by the invention, including connection kelly 1, limit sleeve 2, wedge are accommodated Piece 3, spring 4 and plug 5.As shown in Figure 20 a, Figure 20 b and Figure 20 c, it is equipped with inside the receiving limit sleeve 2 for being inserted into connection The accommodation space 20 of kelly 1, the accommodation space 20 includes directed cavity 23 and plug corrects chamber 24, the plug correction chamber 24 Internal diameter is less than the internal diameter of directed cavity 23, and the inner wall of the plug correction chamber 24 is equipped with sliding slot 21, the directed cavity 23 and plug It corrects and is equipped with First Transition face 25 between chamber 24, be machined with the second internal screw thread on the inner wall of directed cavity 23.In the present embodiment, sliding slot Quantity be 3, and sliding slot 21 is circumferentially uniformly distributed on the inner wall of plug correction chamber 24, and the direction of the sliding slot 21 and accommodating limits The axis direction of set 2 is parallel, has the guiding sliding surface 22 of taper, the wedge in the sliding slot 21 close to connection kelly insertion side Piece 3 and spring 4 are placed in sliding slot 21.In the present embodiment, the structure of spring and key is identical with the first structure, herein, no Repeated description.As shown in figure 21, connection kelly 1 includes the guiding of pedestal 12, plug 13 and the connection pedestal 12 and plug 13 Portion 14 is equipped with the second transition face 15 of taper between the plug 13 and guide part 14, when connection kelly insertion accommodates limit sleeve When, second transition face 15 is abutted with First Transition face 25.The mechanical splice of the structure on accommodating limit sleeve due to processing There is directed cavity, the internal diameter of directed cavity is greater than plug and corrects chamber, and therefore, in grafting starting process, directed cavity is to connection kelly Plug play the guiding role, and when plug enters plug correction chamber, plug correction chamber plays the role of correction (plug school to plug Gap between the positive internal diameter of chamber and the outer diameter of plug is smaller), meanwhile, the second transition face plays downlink limit to connection kelly Effect, can to avoid connection card bar cross insertion and cause the gap between two concrete-pile end faces.In the inner wall of directed cavity The second internal screw thread of upper processing can be connect in casting concrete stake with bolt with the second internal screw thread in order to accommodate guiding Set is fixed, and can pour non-prestressed concrete stake with this configuration.

The end of the plug of connection kelly in the mechanical splice of the structure can be the end of truncated cone-shaped, billiard table shape, excellent Selection of land, plug include the second card access surface, plug guide surface and arc-shaped transitional surface, and second card access surface and plug guide surface are equal Bigger diameter end for taper face, two taper faces is connected by arc-shaped arc-shaped transitional surface, and the first card access surface of mechanical splice is Conical surface or elliptic conic shape face, in the plugged state, first card access surface and the second card access surface are that face contact, solid wire connect Touching or single-contact, first sliding surface is contacted with guiding sliding surface for both threads or face contact.First card access surface and second Taper thread or latch are provided in card access surface, alternatively, only processing taper thread or latch in the second card access surface.These structures are equal It is identical with the first mechanical splice, it is not described in detail herein.

As shown in Figure 22 a it is the 4th kind of structure of mechanical splice disclosed by the invention, including connection kelly 1, accommodates limit Set 2, key 3, spring 4 and plug 5.The mechanical splice of the structure and second structure the difference lies in that the receiving of the structure The first external screw thread 203 is machined on the outer wall of limit sleeve, plug is that a cylindrical structure is mounted in plug installation cavity.

As Figure 23, Figure 24 and Figure 25 show the precast concrete pile with the construction machine connector, including first end plate 80, the second end plate 81, the first end plate 80 and the second end plate 81 are separately fixed at the both ends of precast concrete pile, and described first It is equipped on end plate and the second end plate and accommodates limit sleeve fixation hole 82, main reinforcement fixation hole 84 and connection kelly fixation hole 83, accommodated Limit sleeve fixation hole and main reinforcement fixation hole, which are interconnected, forms calabash shaped structure, the connection card of the connection kelly and first end plate Bar fixation hole is threadedly coupled, and the receiving limit sleeve is threaded in the receiving limit sleeve fixation hole of the second end plate, described pre- The main reinforcement of concrete-pile processed is mounted in main ribs fixation hole.Mechanical splice with this configuration may be implemented with end plate Precast concrete pile quick connection.Similarly, the first structure and mechanical splice disclosed in the third structure can also fit For this structure, i.e., only need the outer spiral shell of processing on the outer wall of receiving limit sleeve disclosed in the first structure and the third structure The connection for the precast concrete pile with end plate had both may be implemented in line.

It is the mechanical splice of structure in the 5th, according to actual requirement of engineering, at the 4th kind as shown in Figure 22 b and Figure 26 On the basis of mechanical splice, increase steel holding holes on plug, increases the intensity of precast concrete pile for connecting anchor rib.

Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.

Claims

1. a kind of mechanical splice, it is characterised in that: including connection kelly (1), accommodate limit sleeve (2), key (3), spring (4) and Plug (5)；

The receiving limit sleeve (2) one end is connection kelly insertion end (26), and the other end is plug fixing end (27), the receiving The accommodation space (20) for being inserted into connection kelly is equipped with inside limit sleeve (2), the inner wall for accommodating limit sleeve (2) is equipped with More than one sliding slot (21) has guiding sliding surface of taper in the sliding slot (21) close to connection kelly insertion end (26) (22)；

The key (3) and spring (4) are placed in the sliding slot (21), and the key (3) is equipped with and guiding sliding surface (22) The first sliding surface (30) of contact, the first card access surface (31) contacted with connection kelly (1) and contacted with spring (4) first End face (32), the connection kelly (1) and key (3) contact position are the second card access surface (10), and the plug (5) is placed in receiving limit The plug fixing end (27) of position set (2), described spring (4) one end are abutted with key (3), and the other end is abutted with plug (5), described Connection kelly (1) can be inserted into accommodation space (20) and key (3) are pushed into guiding sliding surface (22) and the by spring (4) rebound Between two card access surfaces (10) and then realize that connection kelly (1) is connect with limit sleeve (2) are accommodated.

2. mechanical splice according to claim 1, it is characterised in that: the connection kelly (1) includes pedestal (12), plug (13) and the guide part (14) of the connection pedestal (12) and plug (13) the of taper, is equipped between the plug and guide part The internal diameter of two transition faces (15), the connection kelly insertion end for accommodating limit sleeve (2) is equipped with the first inclined-plane (28) of taper, When connecting kelly insertion receiving limit sleeve, second transition face (15) abuts with the first inclined-plane (28).

3. mechanical splice according to claim 2, it is characterised in that: the inner wall of the accommodation space (20) is equipped with first Internal screw thread (201).

4. mechanical splice according to claim 1, it is characterised in that: the accommodation space (20) include directed cavity (23) and Plug corrects chamber (24), and the directed cavity (23) is set to connection kelly insertion end (26) side, plug correction chamber (24) Internal diameter is less than the internal diameter of directed cavity (23), and First Transition face is equipped between the directed cavity (23) and plug correction chamber (24) (25), the inner wall of the directed cavity (23) is equipped with the second internal screw thread (202), and the connection kelly (1) includes pedestal (12), inserts Head (13) and the guide part (14) for connecting pedestal (12) and plug (13), are equipped with cone between the plug (13) and guide part (14) The second transition face (15) of shape, when connecting kelly insertion receiving limit sleeve, second transition face (15) and First Transition face (25) it abuts.

5. mechanical splice as claimed in any of claims 1 to 4, it is characterised in that: first card access surface (31), Anti-skid structure is machined at least one face in second card access surface (10), the first sliding surface (30) and guiding sliding surface (22).

6. mechanical splice according to claim 5, it is characterised in that: the anti-skid structure is taper thread or latch.

7. mechanical splice according to claim 6, it is characterised in that: first card access surface (31) is conical surface or ellipse Conical surface, in the plugged state, first card access surface (31) and the second card access surface (10) be face contact, solid wire contact or Single-contact, first sliding surface (30) contacts with guiding sliding surface (22) for both threads or face contact.

8. mechanical splice according to claim 1, it is characterised in that: be provided on the outer wall for accommodating limit sleeve (2) First external screw thread.

9. a kind of precast concrete pile, it is characterised in that: including described in any one of location nut and claim 1 to 7 Mechanical splice, the location nut (71) and receiving limit sleeve (2) are individually fixed in the both ends of precast concrete pile, the positioning One end of nut is connect with the main reinforcement of pre-value concrete-pile, and the other end and the connection kelly connect, different precast concrete piles It can be connected with each other by the mechanical splice.

10. a kind of precast concrete pile, it is characterised in that: including machine described in first end plate, the second end plate and claim 8 Tool connector, the first end plate and the second end plate are separately fixed at the both ends of precast concrete pile, the first end plate and second It is equipped on end plate and accommodates limit sleeve fixation hole, main reinforcement fixation hole and connection kelly fixation hole, the connection kelly and be mounted on the In the connection kelly fixation hole of end plate, the receiving limit sleeve fixation hole for accommodating limit sleeve and being threaded in the second end plate In, the main reinforcement of the precast concrete pile is mounted in main ribs fixation hole, and different precast concrete piles can pass through the machine Tool connector is connected with each other.