CN211547705U - Clamping type sleeve, connecting piece and prefabricated part assembly - Google Patents

Abstract

The utility model discloses a joint formula sleeve, include: the inner wall surrounds the central axis at a certain distance from the inserting inlet to form a circle of cylinder body of a sliding cavity and more than two movable clamping pieces annularly distributed in the sliding cavity; the movable clamping and stopping piece comprises at least part of an arc-shaped clamping block arranged in the sliding cavity and a first elastic piece arranged in the sliding cavity and used for pushing the arc-shaped clamping block towards the central axis direction of the cylinder body; the contact point of the sliding end face, which is in contact with the cavity wall of the sliding cavity farthest from the inserting inlet and is closest to the central axis, is P1, the axial end point of the back face, which is farthest from the P1, is P2, and the shortest straight-line distance L1 between the contact point P1 and the end point P2 is larger than the axial width h1 at the opening of the sliding cavity. The connecting piece comprises a first connecting component and a second connecting component which are oppositely arranged; the prefabricated part assembly comprises two or more than two prefabricated parts which are sequentially butted along one direction. It can solve the problem that the arc-shaped clamping block is easy to topple over and leads to unable effective connection.

Description

Clamping type sleeve, connecting piece and prefabricated part assembly

Technical Field

The utility model relates to a building element technical field especially relates to a joint formula sleeve, connecting piece and prefab assembly.

Background

In recent years, precast prestressed concrete piles are developed rapidly because the quality stability of the cast-in-place pile is relatively poor, and concrete prestressed concrete piles of various lengths are selected according to different requirements in the piling process, and piles are connected with one another through prefabricated parts to form a pile body of a longer length.

In addition, in the fields of bridges, water pipe connections, culvert buildings and the like, the connection is also required through prefabricated parts, and methods such as splicing, cement paste connection, steel bar connection and the like are generally adopted, but the connection is inconvenient by the methods, and the construction progress is influenced.

The two ends of the existing prefabricated member are provided with steel plates, and the pile bodies are connected through mutual welding between the steel plates. After the pile body after connection is pressed into the ground during pile pressing, salt, especially chloride, contained in the soil can corrode a steel plate exposed in the soil, so that the connection between the piles is broken, and the connection piles are disconnected. In addition, the manner of connection by welding of steel plates is relatively complicated, and connection is inconvenient.

Now, a method for joining endless plates using a joining member has been invented, by which the joining speed and strength between the preforms can be greatly improved and the preforms can be prevented from being corroded, and thus the technique of the endless plate preform is an innovative technique in the preform industry.

For example, in patent document No. 201810292028.5, it appears that the connection of multiple prefabricated members is realized by a connector, but there is a risk that some arc-shaped fixture blocks in the connection nut may topple over during the insertion process, and in the case of only a small number of arc-shaped fixture block devices having reverse locking action, when a large axial pulling force is applied, the insertion rod cannot be clamped effectively and reliably, so that the connection strength of two connection nuts is not ideal, and further, the mutual connection of two prefabricated members is unreliable, which is absolutely not allowed for the construction field with extremely high safety requirements.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a clamping type sleeve which can solve the problem that the arc-shaped clamping block is easy to topple and the inserted rod can not be effectively and reliably clamped;

the second purpose of the utility model is to provide a connecting piece;

the third object of the present invention is to provide a prefabricated member assembly.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

a snap-fit sleeve, comprising: the inner wall surrounds the central axis at a certain distance from the inserting inlet to form a circle of cylinder body of a sliding cavity and more than two movable clamping pieces annularly distributed in the sliding cavity;

the movable clamping and stopping piece comprises at least part of an arc-shaped clamping block arranged in the sliding cavity and a first elastic piece arranged in the sliding cavity and used for pushing the arc-shaped clamping block towards the central axis direction of the cylinder body;

the arc-shaped clamping block is provided with a back surface back to the central axis of the cylinder and a clamping surface at least part of which protrudes out of the sliding cavity and faces the central axis of the cylinder, a sliding end surface is formed between the back surface and the clamping surface, and the back surface is fully positioned in the sliding cavity;

in the axial section of the clamping type sleeve, a contact point P1 which is in contact with the cavity wall of the sliding cavity farthest from the inserting inlet and is closest to the central axis is arranged on the sliding end face, an axial end point P2 which is farthest from the P1 is arranged on the back face, and the shortest straight-line distance L1 between the contact point P1 and the end point P2 is larger than the axial width h1 at the opening of the sliding cavity.

Furthermore, the barrel is of a split structure and comprises an outer nut sleeve with a socket channel and an inner support body which is in threaded connection with the outer nut sleeve and is provided with a jack, the socket channel and the jack jointly form a bearing jack, one surface, close to the movable clamping and stopping piece, of the outer nut sleeve serves as a first sliding surface in sliding fit with the arc-shaped clamping block, one surface, close to the movable clamping and stopping piece, of the inner support body serves as a second sliding surface in sliding fit with the arc-shaped clamping block, and a sliding cavity communicated with the bearing jack is formed between the first sliding surface and the second sliding surface.

Further, in the direction close to the central axis of the cylinder, the axial width of the sliding cavity is gradually reduced, and when the axial width h1 at the opening of the sliding cavity is greater than the axial dimension h2 of the arc-shaped fixture block close to one end of the central axis of the cylinder and is less than the maximum axial dimension h3 of the arc-shaped fixture block, the length of the first elastic element is greater than or equal to the radial depth of the sliding cavity;

when the axial width h1 at the opening of the sliding cavity is greater than the axial dimension h2 of one end of the arc-shaped fixture block close to the central axis of the cylinder body and is equal to the maximum axial dimension h3 of the arc-shaped fixture block, the length of the first elastic piece is less than the radial depth of the sliding cavity.

Furthermore, a through hole which is coaxially communicated with the socket hole and is communicated with the socket hole is formed in one end, far away from the inserting inlet, of the inner support body, and a stop clamping table is arranged on one side, close to the inserting inlet, of the through hole.

Further, the barrel formula structure as an organic whole, the lateral wall of sliding cavity with set up between the arc fixture block and be favorable to the installation the clearance of arc fixture block.

Furthermore, one surface of the arc-shaped fixture block, which is at least far away from the insertion inlet, is in sliding fit with the sliding cavity.

Furthermore, the arc-shaped fixture block is provided with a guide surface convenient for insertion;

in the direction from the inserting inlet to the sliding cavity, the axial contour generatrix of the guide surface is gradually close to the central axis of the cylinder body, and the axial contour generatrix of the clamping surface is gradually far away from the central axis of the cylinder body or is parallel to the central axis of the cylinder body.

The second purpose of the utility model is realized by adopting the following technical scheme:

a connecting piece comprises a first connecting component and a second connecting component which are axially arranged oppositely, wherein the first connecting component comprises an inserting rod and a fixing sleeve connected with the inserting rod, and a plug-in connector is arranged at one end, far away from the fixing sleeve, of the inserting rod; the second connecting assembly comprises any one of the clamping type sleeves, and after the plug connector is inserted into the clamping type sleeve, the arc-shaped clamping block axially clamps the plug connector.

Furthermore, at least one reverse clamping stop table is arranged on the clamping surface of the arc-shaped clamping block along the direction of the contour generatrix, and at least one lug boss which is abutted against the reverse clamping stop table is arranged on the peripheral wall corresponding to the plug-in connector of the plug rod.

The third purpose of the utility model is realized by adopting the following technical scheme:

a preform assembly, characterized by: the prefabricated member comprises two or more than two prefabricated members which are sequentially butted along one direction, and the adjacent prefabricated members are butted through the connecting piece of any one of the above parts;

preferably, each prefabricated part comprises a concrete body with a built-in rigid framework, and the rigid framework is provided with a plurality of stress bars distributed in an array;

in two adjacent prefab, at least some atress muscle of quantity respectively rigid coupling one in a prefab in an one tip fixed sleeve, and/or at least some atress muscle of quantity respectively rigid coupling one in another prefab in butt joint one the joint formula sleeve.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a joint formula sleeve, connecting piece and prefab assembly is through setting up joint formula sleeve and activity clamping part, wherein activity clamping part contains radially movable arc fixture block and places in slide chamber and supports the first elastic component who pushes away arc fixture block to barrel axis direction, and in the axial section of joint formula sleeve, the shortest straight-line distance L1 between contact point P1 on the activity clamping part and extreme point P2 is greater than the axial width h1 of slide chamber opening part, therefore the arc fixture block receives slide chamber radial spacing, can guarantee that the arc fixture block is located the slide chamber all the time relatively the part of keeping away from the barrel axis on P1P2 line and does not take off, then can prevent that the arc fixture block from toppling over; in addition, the first elastic piece can apply elasticity to the central axis of the cylinder body to the arc-shaped clamping block, so that the arc-shaped clamping block is matched with the plug connector more stably.

Drawings

FIG. 1 is a cross-sectional view of a bayonet type socket having a plurality of reverse locking stops in example 1;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a cross-sectional view of the bayonet type socket with a reverse locking abutment in embodiment 1;

FIG. 4 is a cross-sectional view of the arcuate latch of the snap-fit sleeve of embodiment 1;

FIG. 5 is a sectional view of the joint member in embodiment 1;

fig. 6 is an exploded sectional view of the connecting member in example 1;

fig. 7 is a schematic view illustrating connection between an arc-shaped fixture block and a plug of the connector in embodiment 1;

FIG. 8 is a schematic view of a snap-fit sleeve provided with a second elastic member according to embodiment 1;

FIG. 9 is a partial cross-sectional view of the preform assembly of example 1;

FIG. 10 is an enlarged view of the structure at B in FIG. 9;

FIG. 11 is a schematic view showing the structure of a preform assembly with connectors according to example 1;

FIG. 12 is a partial exploded sectional view of a connector in example 2;

FIG. 13 is an enlarged view of the structure of FIG. 12 at C;

FIG. 14 is a sectional view of the clip-on sleeve according to embodiment 3;

in the figure: 1. a clamping type sleeve; 10. an insertion inlet; 11. a barrel; 111. a socket hole; 111a, a plug inlet; 112. an inner support body; 113. an outer nut sleeve; 114. a socket channel; 115. a jack; 116. A first slide surface; 117. a second sliding surface; 118. a second elastic member; 12. a movable fastener; 121. an arc-shaped fixture block; 121a, a clamping surface; 121b, a back side; 121c, reverse blocking stop table; 121d, guide surface; 122. A slide chamber; 123. a first elastic member; 13. perforating; 131. a stop clamping table; 2. a connecting member; 21. inserting a rod; 211. a plug-in connector; 212. a plug end; 213. a convex ring; 214. a boss; 22. fixing the sleeve; 221. An accommodating cavity; 222. a clamping part; 223. clamping a platform; 3. a preform assembly; 31. a prefabricated member; 311. a concrete body; 312. a stress rib; 313. a large part.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

in the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "horizontal", "longitudinal", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1-4, the utility model discloses a joint formula sleeve 1, include: a barrel 11 and two or more movable grips 12. Specifically, a circle of sliding cavity 122 is formed around the central axis at a certain distance from the insertion inlet 10 on the inner wall of the cylinder 11, and more than two movable clamping-stopping pieces 12 are annularly distributed in the sliding cavity 122. In this embodiment, the sliding cavity 122 is preferably located in the middle of the barrel 11 and at least 0.5 cm above the insertion inlet. The movable locking member 12 includes at least a part of an arc-shaped locking block 121 disposed in the sliding cavity and a first elastic member 123 disposed in the sliding cavity 122 and pushing the arc-shaped locking block 121 toward the central axis of the barrel 11; the arc-shaped fixture block 121 has a back surface 121b facing the central axis of the cylinder and a clamping surface 121a at least partially protruding out of the sliding cavity 122 and facing the central axis of the cylinder 11, a sliding end surface is formed between the back surface 121b and the clamping surface 121a, and the back surface is located in the sliding cavity 122.

In the axial section of the snap-fit sleeve 1, a contact point on the sliding end surface, which is in contact with the cavity wall of the sliding cavity 122 farthest from the plug-in inlet 10 and closest to the central axis, is P1, an axial end point on the back surface 121b farthest from P1 is P2, and the shortest straight-line distance L1 between the contact point P1 and the end point P2 is greater than the axial width h1 at the opening of the sliding cavity 122.

In the above embodiment, the barrel 11 is at least provided with one sliding cavity 122 and one movable locking member 12, if there are a plurality of sliding cavities 123 and movable locking members 121, the plurality of sliding cavities 123 and movable locking members 121 are uniformly and annularly distributed in the receiving hole 111, the sliding cavity 122 surrounds a central axis to form a circle, and the arc-shaped locking block 121 is slidably connected to the sliding cavity 122 through the first elastic member 123. Referring to fig. 2 in conjunction with fig. 5 again, when a plug rod 21 passes through the plug inlet 10 and is inserted between the arc-shaped latches 121, because the shortest linear distance L1 between the contact point P1 on the movable locking member and the end point P2 is greater than the axial width h1 of the opening of the sliding cavity in the axial section of the snap-fit sleeve, the arc-shaped latches are radially limited by the sliding cavity, so that the arc-shaped latches are always disposed in the sliding cavity at the left side of the line P1P2, and the arc-shaped latches 121 are limited by the first elastic member 123, so that the arc-shaped latches 121 are prevented from falling down due to gravity or extrusion, and the plug rod 21 and the arc-shaped latches 121 are connected more stably. In the inserting process, the arc-shaped latch 121 is driven by the inserting rod 21 to move in the inserting direction, so as to provide a supporting force for the arc-shaped latch 121 to prevent the arc-shaped latch 121 from falling.

Preferably, the arc-shaped fixture block 121 is slidably engaged with the sliding cavity 122 at least on the surface far away from the insertion inlet 10. In order to stabilize the arc-shaped block 121, the two surfaces of the arc-shaped block 121 along the central axis of the cylinder 10 are both in sliding fit with the sliding cavity 122.

The first elastic member 123 is preferably a spring, and the spring can apply an elastic force to the arc-shaped latch 121 toward the insertion rod 21, so that the insertion rod 21 and the arc-shaped latch 121 are clamped more stably.

Furthermore, referring to fig. 3, the barrel 11 is a split structure, and includes an outer nut socket 113 having a socket channel 114 and an inner support 112 having a socket 115 and being in threaded connection with the outer nut socket 113, the socket channel 114 and the socket 115 together form a bearing socket 111, one surface of the outer nut socket 113 close to the movable latching member 12 serves as a first sliding surface 116 in sliding fit with the arc-shaped latching block 121, one surface of the inner support 112 close to the movable latching member 12 serves as a second sliding surface 117 in sliding fit with the arc-shaped latching block 121, and a sliding cavity 122 communicating with the socket 111 is formed between the first sliding surface 116 and the second sliding surface 117.

In this embodiment, the first slide surface 116 may serve as an upper end surface of the slide chamber 123, and the second slide surface 117 may serve as a lower end surface of the slide chamber 123. The arc-shaped fixture block 121 slides along the first sliding surface 116 or the second picture 117, and the outer nut sleeve 113 is in threaded connection with the inner support 112 to form the sliding cavity 122, so that the movable clamping member 12 can be conveniently installed, and the size of the sliding cavity 122 can be adjusted.

As shown in fig. 4, in order to prevent the arc-shaped latch 121 from slipping out of the slide cavity 122, the axial width of the slide cavity 122 is gradually reduced in a direction approaching the central axis of the cylinder 11. When the axial width h1 at the opening of the sliding cavity 122 is greater than the axial dimension h2 of the arc-shaped latch 121 near the central axis of the cylinder 11 and is less than the maximum axial dimension h3 of the arc-shaped latch 121, the length of the first elastic element 123 is greater than or equal to the radial depth of the sliding cavity 123. This structure can let arc fixture block 121 be close to the joint face 121a roll-off of barrel 11 axis slide cavity 122, and with the inserted bar 21 joint, just first elastic component 123 can give arc fixture block 121 applys the elasticity to barrel 1 axis, and makes arc fixture block 121 and more firm of inserted bar 21 joint, can let arc fixture block 121 keep away from the one end of barrel 11 axis can not the roll-off slide cavity 122 reaches and prevents the effect of arc fixture block 121 slippage. Of course, the length of the first elastic member 123 may be selected to be smaller than the radial depth of the sliding chamber 123.

When the axial width h1 at the opening of the sliding cavity 122 is greater than the axial dimension h2 of the arc-shaped latch 121 near the central axis of the cylinder and is equal to the maximum axial dimension h3 of the arc-shaped latch 121, the length of the first elastic element 123 is less than the radial depth of the sliding cavity 122. In this structure, since the length of the first elastic member 123 is smaller than the radial depth of the sliding cavity 122, when the arc-shaped latch 121 is about to slide out of the sliding cavity 122, the first elastic member 123 applies a force to the arc-shaped latch 121, which is away from the central axis of the cylinder 1, so as to prevent the arc-shaped latch 121 from sliding out of the sliding cavity 122.

The length of the first elastic member 123 is a natural length of the first elastic member 123 without any external force except gravity.

As shown in fig. 5-6, the utility model also discloses a connecting piece 2, which comprises a first connecting component and a second connecting component which are axially arranged oppositely, wherein the first connecting component comprises an inserting rod 21 and a fixing sleeve 22 connected with the inserting rod 21, and the end of the inserting rod 21 far away from the fixing sleeve 22 is a plug 211; the second connecting assembly comprises the clamping type sleeve 1, and when the plug-in connector 21 is inserted between the arc-shaped clamping blocks 121, the arc-shaped clamping blocks 121 axially clamp the plug-in connector 211.

In the above embodiment, the inserting rod 21 is a rod-shaped body to facilitate the insertion of the first connecting assembly into the barrel 11, the inserting head 211 can be clamped with the arc-shaped clamping block 121 to facilitate the clamping and clamping of the first connecting assembly with the clamping sleeve 1 for clamping and stopping, and the fixing sleeve 22 has a clamping portion 222 for connecting the first connecting assembly with an outer member, which can be a stress rib 312 on a prefabricated member.

Specifically, as shown in fig. 7, at least one reverse blocking stop 121c is disposed on the clamping surface 121a of the arc-shaped clamping block 121 along the direction of the contour generatrix, and at least one boss 214 abutting against the reverse blocking stop 121c is disposed on the outer peripheral wall of the plug 211 of the corresponding plug rod 21.

Preferably, the reverse clamping stop table 121c and the boss 214 are uniformly arranged at intervals, and the structure can realize reverse clamping after the arc-shaped clamping block 121 is clamped with the plug 211, so that the anti-pulling effect is achieved.

In a preferred embodiment, the reverse locking stopper 121c is a ratchet having a tooth tip inclined in the insertion direction of the plunger 21, the projection 214 is a ratchet having a tooth tip inclined in the extraction direction of the plunger 21 and engageable with the reverse locking stopper 121c, and the projection 214 is engaged with the reverse locking stopper 121c and stabilized when the bayonet 211 is inserted into the arc-shaped latch 121. In addition, the plug 211 can only move along the insertion direction, so as to achieve the anti-dropping and anti-pulling effects. It will be appreciated that the boss 214 and the reverse latch stop 121c may also be helical teeth.

Further, as shown in fig. 7, in order to prevent the insertion rod 115 from impacting the arc-shaped latches 121 due to excessive gravity, a second elastic member 118 is disposed in the insertion hole 116, and when the insertion head 211 is inserted between the arc-shaped latches 121, the bottom end of the insertion head 211 abuts against the second elastic member 118. At this time, the second elastic element 118 can provide a supporting force for the plug 211, so as to play a role of buffering. Wherein the second elastic member 118 is preferably a rigid spring.

As shown in fig. 9-10, the present invention also discloses a prefabricated component assembly 3, which comprises two or more prefabricated components 31 that are butt-jointed in sequence along a direction, and the adjacent prefabricated components are butt-jointed through the connecting member 2; preferably, each prefabricated member 31 includes a concrete body 311 with a built-in rigid frame having a plurality of stress bars 312 distributed in an array; in two adjacent prefabricated members 31, at least a part of the stress ribs 312 in one prefabricated member 31 are fixedly connected with one fixing sleeve 22 at one end respectively, and/or at least a part of the stress ribs 312 in the other prefabricated member 31 are fixedly connected with one clamping type sleeve 1 at the opposite end respectively.

In the above embodiment, as shown in fig. 10 to 11, the connection of adjacent prefabricated members is realized by a plurality of connecting members 2, and the first connecting assembly and the second connecting assembly in the connecting members 2 are arranged in the concrete body 311 after being connected, so that the corrosion caused by exposure to soil can be avoided, the service life is prolonged, and the connection of adjacent prefabricated members 31 can be more stable.

As shown in fig. 10, in order to facilitate the fixing sleeve 22 to connect the stress rib 312 on the prefabricated member 31, the upper end of the fixing sleeve 22 is provided with a clamping portion 222 for connecting the stress rib 312. Joint portion 222 includes interconnect's link and stretch-draw end be equipped with the internal thread on the link inner wall, stretch-draw end with the link is inside to have the through-hole of intercommunication each other, just the inner wall aperture of stretch-draw end is less than the inner wall aperture of link, thereby makes stretch-draw end inner wall with the junction of link inner wall forms the card platform 223 that can block expansion portion 313 on the atress muscle 312.

Wherein, the outer surface of the clamping platform 223 is formed by at least two supporting surfaces which are not on the same plane and connected with each other. The expanded part of the stress rib 312 and the plurality of supporting surfaces of the clamping platform 223 form a multi-stage support, so that the contact area is increased, the tensile tension of the clamping platform 223 on the fixing sleeve 22 is improved, and the stress rib 312 is prevented from being pulled off. The load bar 312 is typically made of steel.

Example 2

In this embodiment, it is different from embodiment 1 in that, as shown in fig. 12, the cylinder 11 is an integral structure, and a gap facilitating installation of the arc-shaped latch 121 is provided between the side wall of the sliding cavity 122 and the arc-shaped latch 121.

Specifically, a gap is formed between the sliding surface of the sliding cavity 122 and the arc-shaped latch 121, so that when the movable clamping and stopping member 12 is installed, one end of the first elastic member 123 can be fixed to the arc-shaped latch 121, and then the other end of the first elastic member 123 is welded or hung on the inner wall of the sliding cavity 122.

In the above embodiment, in order to facilitate installation of the arc-shaped fixture block 121, the minimum axial distance h1 between the slide cavity 122 and the end close to the central axis of the receptacle 111 should be greater than the maximum axial dimension h3 of the arc-shaped fixture block 121, so that at least part of or even all of the arc-shaped fixture block 121 can be installed in the slide cavity 122; in addition, in order to ensure that the arc-shaped latch 121 is not ejected out of the sliding cavity 122 by the first elastic member 123, at least a portion of the arc-shaped latch 121 is still in the sliding cavity 122 under the natural length of the first elastic member 123.

In addition, in order to enable the fixing sleeve 22 to be connected with the insert rod 21 more firmly, the lower end of the fixing sleeve 22 is provided with an accommodating cavity 221, the accommodating cavity 221 is communicated with the clamping portion 222, the upper end of the insert rod 21 is provided with an insertion end 212, and the insertion end 212 is in threaded connection with the accommodating cavity 221. At this time, the insertion rod 21 is provided with a convex ring 213, and the convex ring 213 facilitates an inner hexagonal wrench or an octagonal wrench to tighten the insertion end 212 and the accommodation cavity 221. It is understood that the plug end 212 and the receiving cavity 221 can be fixed together by clipping or riveting.

Preferably, as shown in fig. 13, in order to facilitate the connection between the insertion rod 21 and the arc-shaped latch 121, a guide surface 121d for facilitating the insertion of the insertion rod 21 is provided on the arc-shaped latch 121; in the direction from the plug inlet 10 to the sliding cavity 122, the axial contour generatrix of the guide surface 121d gradually approaches the central axis of the barrel 11, and the axial contour generatrix of the snap-in surface 121a gradually moves away from the central axis of the barrel 11 or is parallel to the central axis of the barrel.

Example 3

In this embodiment, it is different from embodiments 1 and 2 in that, as shown in fig. 14, a through hole 13 coaxially communicating with and penetrating through the receptacle hole 111 is provided at one end of the cylinder 11 far from the female port of the receptacle hole 111, and a stopper boss 131 is provided at one side of the through hole 13 near the plug inlet 10. The stopper boss 131 is used to abut against the expanded portion 313 of the stress-receiving rib 312 to transmit stress.

In addition, some technical implementations of embodiments 1 to 3 may be combined or replaced.

In summary, the clamping type sleeve, the connecting member and the prefabricated member assembly provided by the present invention is provided with the sliding cavity 122 and the movable clamping and stopping member 12, wherein the movable clamping and stopping member 12 comprises the radially movable arc-shaped clamping block 121 and the first elastic member 123 which is arranged in the sliding cavity 122 and pushes the arc-shaped clamping block 121 toward the central axis direction of the barrel 11, and in the axial section of the clamping type sleeve 1, the shortest straight line distance L1 between the contact point P1 on the movable clamping and stopping member 12 and the end point P2 is greater than the axial width h1 of the opening of the sliding cavity 122, so that the arc-shaped clamping block 121 is radially limited by the sliding cavity 122, and the part of the arc-shaped clamping block 121, which is relatively far away from the central axis of the barrel 11 on the P1P2 connection line, can be ensured to be; in addition, the first elastic element 123 can apply elastic force to the arc-shaped fixture block 121 towards the central axis of the socket hole 111, so that the arc-shaped fixture block 121 is clamped with the plug 211 more stably.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims (10)

1. A snap-fit sleeve, comprising: the inner wall surrounds the central axis at a certain distance from the inserting inlet to form a circle of cylinder body of a sliding cavity and more than two movable clamping pieces annularly distributed in the sliding cavity;

the movable clamping and stopping piece comprises at least part of an arc-shaped clamping block arranged in the sliding cavity and a first elastic piece arranged in the sliding cavity and used for pushing the arc-shaped clamping block towards the central axis direction of the cylinder body;

the arc-shaped clamping block is provided with a back surface back to the central axis of the cylinder and a clamping surface at least part of which protrudes out of the sliding cavity and faces the central axis of the cylinder, a sliding end surface is formed between the back surface and the clamping surface, and the back surface is fully positioned in the sliding cavity;

in the axial section of the clamping type sleeve, a contact point P1 which is in contact with the cavity wall of the sliding cavity farthest from the inserting inlet and is closest to the central axis is arranged on the sliding end face, an axial end point P2 which is farthest from the P1 is arranged on the back face, and the shortest straight-line distance L1 between the contact point P1 and the end point P2 is larger than the axial width h1 at the opening of the sliding cavity.

2. The clamp-on sleeve of claim 1, wherein: the barrel is of a split structure and comprises an outer nut sleeve with a socket channel and an inner support body which is in threaded connection with the outer nut sleeve and is provided with a jack, the socket channel and the jack jointly form a bearing jack, one surface, close to the movable clamping and stopping piece, of the outer nut sleeve serves as a first sliding surface in sliding fit with the arc-shaped fixture block, one surface, close to the movable clamping and stopping piece, of the inner support body serves as a second sliding surface in sliding fit with the arc-shaped fixture block, and a sliding cavity communicated with the bearing jack is formed between the first sliding surface and the second sliding surface.

3. The snap-fit sleeve of claim 2, wherein: in the direction close to the central axis of the cylinder body, the axial width of the sliding cavity is gradually reduced, and when the axial width h1 at the opening of the sliding cavity is greater than the axial dimension h2 of one end, close to the central axis of the cylinder body, of the arc-shaped fixture block and is less than the maximum axial dimension h3 of the arc-shaped fixture block, the length of the first elastic piece is greater than or equal to the radial depth of the sliding cavity;

when the axial width h1 at the opening of the sliding cavity is greater than the axial dimension h2 of one end of the arc-shaped fixture block close to the central axis of the cylinder body and is equal to the maximum axial dimension h3 of the arc-shaped fixture block, the length of the first elastic piece is less than the radial depth of the sliding cavity.

4. The snap-fit sleeve of claim 2, wherein: and one end of the inner support body, which is far away from the inserting inlet, is provided with a through hole which is coaxially communicated with the socket hole and is communicated with the socket hole, and one side of the through hole, which is close to the inserting inlet, is provided with a stop clamping table.

5. The clamp-on sleeve of claim 1, wherein: the barrel is of an integrated structure, and a gap which is favorable for installation of the arc-shaped clamping block is formed between the side wall of the sliding cavity and the arc-shaped clamping block.

6. The clamp-on sleeve of claim 1, wherein: and at least one surface of the arc-shaped clamping block, which is far away from the inserting inlet, is in sliding fit with the sliding cavity.

7. The snap-fit sleeve of any one of claims 1-6, wherein: the arc-shaped fixture block is provided with a guide surface convenient for insertion;

in the direction from the inserting inlet to the sliding cavity, the axial contour generatrix of the guide surface is gradually close to the central axis of the cylinder body, and the axial contour generatrix of the clamping surface is gradually far away from the central axis of the cylinder body or is parallel to the central axis of the cylinder body.

8. A connector, characterized by: the connecting device comprises a first connecting assembly and a second connecting assembly which are axially arranged oppositely, wherein the first connecting assembly comprises an inserting rod and a fixing sleeve connected with the inserting rod, and one end of the inserting rod, which is far away from the fixing sleeve, is provided with a plug-in connector; the second connecting component comprises the clamping-type sleeve as claimed in any one of claims 1 to 7, and the arc-shaped clamping blocks axially clamp the plug-in connector after the plug-in connector is inserted into the clamping-type sleeve.

9. The connector of claim 8, wherein: at least one reverse blocking stop table is arranged on the blocking surface of the arc-shaped clamping block along the direction of the contour generatrix, and at least one lug boss which is abutted against the reverse blocking stop table is arranged on the peripheral wall corresponding to the plug-in connector of the plug rod.

10. A preform assembly, characterized by: comprising two or more prefabricated members which are butted in sequence in a direction, and the adjacent prefabricated members are butted by the connecting member as claimed in any one of claims 8 to 9;

each prefabricated part comprises a concrete body internally provided with a rigid framework, and the rigid framework is provided with a plurality of stress bars distributed in an array;

in two adjacent prefab, at least some atress muscle of quantity respectively rigid coupling one in a prefab in an one tip fixed sleeve, and/or at least some atress muscle of quantity respectively rigid coupling one in another prefab in butt joint one the joint formula sleeve.

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