CN213117923U - Steel-socket concrete pipeline with special-shaped sealing rubber ring - Google Patents

Steel-socket concrete pipeline with special-shaped sealing rubber ring Download PDF

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Publication number
CN213117923U
CN213117923U CN202021793769.0U CN202021793769U CN213117923U CN 213117923 U CN213117923 U CN 213117923U CN 202021793769 U CN202021793769 U CN 202021793769U CN 213117923 U CN213117923 U CN 213117923U
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China
Prior art keywords
straight line
arc
rubber ring
sealing rubber
special
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CN202021793769.0U
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Inventor
李成春
邢兵兵
蔡范军
乔云武
孙芹先
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SHANDONG LONGQUAN PIPELINE ENGINEERING Co.,Ltd.
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Shandong Longquan Pipeline Engineering Co ltd
Shandong Zequan Scientific Engineering Industrial Technology Research Institute Co ltd
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Abstract

The utility model discloses a steel socket concrete pipeline with dysmorphism sealing rubber ring, including body, socket end, two rings of annular groove have still been seted up on the outside wall of socket end, be provided with special-shaped sealing rubber ring in the annular groove. The axial cross-section of the profiled annular member comprises: the first side of straight line, sharp second limit, sharp third limit, pitch arc fourth edge, pitch arc fifth limit, sharp sixth limit, the annular cavity has still been seted up to dysmorphism annular component inside. The annular cavity and the fourth arc line limit that special-shaped sealing rubber ring had make spigot end and female end easier when butt joint installation, and the installation is accomplished the back, and the annular cavity and the fourth arc line limit that compressed special-shaped sealing rubber ring had have the trend that resets, have bigger sliding resistance between spigot end and the female end, and the difficult axial displacement that takes place of pipeline has strengthened pipeline kneck connection sealing performance's stability and durability.

Description

Steel-socket concrete pipeline with special-shaped sealing rubber ring
Technical Field
The utility model relates to a concrete pipe technical field, concretely says so and relates to a steel holds a mouthful concrete pipe with dysmorphism sealing rubber ring.
Background
The production of the reinforced concrete pipe and the application history of the reinforced concrete pipe in drainage engineering are long, the technology is mature, the common concrete pipe comprises a rigid connector and a flexible connector, the rigid connector comprises a pipe-shaped plain end and a tongue-and-groove, the flexible connector comprises a pipe-shaped socket and spigot, and the steel collar connector. Wherein, socket pipe type has the advantage that the leakproofness is good, simple to operate and is used widely.
The socket pipe is divided into the following types according to the difference of the socket and the socket material: 1. a concrete bell mouth and a concrete spigot; 2. a rigid socket and a concrete socket; 3. steel bellmouth and steel socket. The butt joint between the bell and spigot is sealed usually to rely on the rubber seal who installs at the mouth of pipe tip to realize the sealing of intraductal fluid, and the sealing rubber ring that uses usually is easy to assemble and the better O shape of sealing performance or wedge shape rubber ring, because need during the installation with the socket to the bellmouth top advance, the degree of difficulty that this kind of rubber ring compressed can increase the top advance to, easily produce the ascending relative slip of axial between two pipelines after the installation is accomplished, current rubber ring does not have good limiting action to pipeline in the ascending slip of axial.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of above-mentioned prior art, provide a steel bell and spigot concrete pipeline with dysmorphism sealing rubber ring, this dysmorphism sealing rubber ring makes and has bigger sliding resistance between socket end and the bell and spigot end, and the difficult axial displacement that takes place of pipeline has strengthened pipeline kneck and has connected sealing performance's stability and durability.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a steel bell mouth concrete pipe with dysmorphism sealing rubber ring, includes the body, sets up at the socket end of body one end, sets up the socket end at the body other end, still set up two rings of annular grooves that are parallel to each other and size of a dimension on the outside wall of socket end, two rings of annular grooves are respectively for being close to the first annular groove of socket end tip and keeping away from the second annular groove of socket end tip for first annular groove. The first annular groove and the second annular groove are parallel to each other and have the same size, and a special-shaped sealing rubber ring is arranged in the annular groove.
The utility model discloses in, respectively be provided with a dysmorphism sealing rubber ring in the two rings of annular grooves respectively, compare in traditional offer round annular groove on socket end outside wall to be provided with sealing rubber ring in this round annular groove, the utility model discloses well two rings of dysmorphism sealing rubber ring's setting has ensured that connection performance and sealing performance between socket end and the socket end are more stable more durable.
The special-shaped sealing rubber ring is a special-shaped annular component, the axial section of the special-shaped annular component is a first irregular shape formed by surrounding six edges in the same plane, and the first irregular shape comprises:
a linear first side;
the first end of the first side of the straight line is connected with the first end of the second side of the straight line;
the third side of the straight line is parallel to the first side of the straight line, the third side of the straight line and the first side of the straight line are both positioned at the same side of the second side of the straight line, the first end of the third side of the straight line is connected with the second end of the second side of the straight line, and the third side of the straight line and the first side of the straight line have the same length;
the arc protrusion of the arc fourth edge faces the direction of the first edge of the straight line, and the first end of the arc fourth edge is connected with the second end of the third edge of the straight line;
the arc protrusion of the fifth side of the arc line faces the direction of the third side of the straight line, the first end of the fifth side of the arc line is connected with the second end of the fourth side of the arc line, and the arc length of the fifth side of the arc line is smaller than that of the fourth side of the arc line;
the first end of the first side of the straight line is connected with the second end of the fifth side of the arc line, and the second end of the second side of the straight line is connected with the second end of the first side of the straight line.
During the use, respectively overlap in first annular groove and the annular groove of second and inlay a dysmorphism sealing rubber ring, dysmorphism sealing rubber ring syntropy sets up in two annular grooves, the utility model discloses well dysmorphism sealing rubber ring arrangement mode on annular groove is: the arc-shaped convex direction of the fourth arc line edge is consistent with the jacking direction of the socket end, namely the first edge of the straight line is closer to the end face of the socket end relative to the third edge of the straight line. This sealed rubber ring sharp second limit is laminated mutually with the tank bottom of cyclic annular recess, advances to the socket end with the socket end, and the straight line sixth limit is laminated mutually with the interior lateral wall face of socket end, because the arc arch of pitch arc fourth side is protruding towards the direction at the first limit place of straight line, the sunken cavity of arc that this arc protruding department can form so, this cavity makes sealed rubber ring compressed easily, so, it is easier when advancing the socket end into the socket end, greatly reduced the degree of difficulty of butt joint installation. And, this dysmorphism sealing rubber ring has beneficial effect on the arrangement mode on the annular groove: because the sixth edge of the straight line has a certain inclination angle during jacking installation, the compressed distance of the sealing rubber ring in the radial direction is increased along with the jacking process, and the jacking installation is easier.
The manner in which the outer surface of the barrel is provided with the annular groove is known in the art and will not be described further herein. The annular groove may be formed on the outer wall surface of the socket end during production, processing and manufacturing, or may be formed on the outer wall surface of the socket end by a grooving machine or a grooving tool, and the grooving mode is the prior art in the field and is not described herein again.
An annular cavity is further formed in the special-shaped annular component. The utility model discloses in, this annular cavity's axial section can be regular shape, such as circular, triangle-shaped, trapezoidal, rectangle etc. and this annular cavity's axial section can also be irregularly shaped's dysmorphism, for example this shape is: the middle of the rectangular body is rectangular, two sides of the rectangular body are respectively connected with two semi-circular shapes, and the two semi-circular arc-shaped protrusions are arranged back to back.
The utility model provides a special-shaped shape as follows:
the axial section of the annular cavity is a second irregular shape formed by enclosing four sides in the same plane, and the second irregular shape comprises:
a first straight edge;
a second arc edge, wherein a first end of the second arc edge is connected with a first end of the first straight edge;
the third straight line edge is parallel to the first straight line edge in length, and the first end of the third straight line edge is connected with the second end of the second arc line edge;
a fourth arc edge, the arc length of which is equal to the arc length of the second arc edge, the first end of the fourth arc edge being connected to the second end of the third straight edge, the second end of the fourth arc edge being connected to the second end of the first straight edge;
the arc-shaped protrusion on the second arc line edge and the arc-shaped protrusion on the fourth arc line edge are arranged in a back-to-back mode.
The setting of annular cavity makes the sealing rubber ring compressed easily, so, it is easier when in the pipeline top advance that has great size end with the pipeline that has less size end, greatly reduced the degree of difficulty of butt joint installation.
The arc sunken cavity that the arc arch of ring cavity and pitch arc fourth side department formed makes special-shaped sealing rubber ring easier when compressed, and ring cavity and arc sunken cavity all are in by the compression state, and, because the sharp sixth limit has certain inclination when advancing in the top, and the socket end top advances the socket end process easier.
After the butt joint of the two pipelines is completed, because the special-shaped sealing rubber ring is made of elastic materials, the compressed arc fourth edge and the annular cavity on the special-shaped rubber ring have the resetting trend, namely, the compressed special-shaped sealing rubber ring has reaction force to the socket end and the socket end which are contacted with the special-shaped sealing rubber ring, and the reaction force acts on the inner side wall surfaces of the bottom of the annular groove and the socket end, so that the sliding resistance between the socket end and the socket end is larger, and the special-shaped sealing rubber ring has better limiting effect on the sliding of the pipelines in the axial direction. The connecting pipeline is not easy to be influenced by factors such as uneven foundation settlement, pressure change in the pipeline and the like to generate relative sliding in the axial direction, and the stability of pipeline connection is greatly improved.
The utility model discloses in, according to the difference of socket end or socket end material, the socket end or the socket end at same pipeline both ends have following several kinds of combination forms:
the female end and the female end are both made of concrete.
The female end is made of steel, and the female end is made of concrete.
The female end and the socket end are made of steel.
The utility model has the advantages that,
1. the utility model discloses in, respectively overlap in first annular groove and the second annular groove and inlay a dysmorphism sealing rubber ring, arc cavity and the annular cavity that the protruding department of arc on dysmorphism sealing rubber ring fourth pitch arc limit formed make sealing rubber ring compressed, and it is easier during socket end top entry socket end, has reduced the degree of difficulty of butt joint installation.
2. The utility model discloses in, two circles of annular recesses have been seted up to socket end outside wall, respectively are provided with a dysmorphism sealing rubber ring in two circles of annular recesses respectively, have ensured that connection performance and sealing performance between socket end and the socket end are more stable more durable.
3. The utility model discloses in, dysmorphism sealing rubber ring makes for the elasticity material, and the back is accomplished in the butt joint, because pitch arc fourth edge and the annular cavity that receive the compression on the dysmorphism rubber ring all have the trend of resetting, dysmorphism sealing rubber ring all has the reaction force to socket end and socket end, has bigger sliding resistance between socket end and the socket end, and this sliding resistance effectively prevents that the pipeline from sliding on the axial, has improved the stability of pipe connection.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention in any way. In the drawings:
FIG. 1 is a schematic view of the overall structure of a steel bell concrete pipeline with a special-shaped sealing rubber ring according to an embodiment of the present invention;
fig. 2 is a schematic axial sectional structure diagram of the special-shaped sealing rubber ring in the embodiment of the present invention;
FIG. 3 is a schematic axial sectional view of the annular cavity of FIG. 2 at location A on the shaped sealing rubber ring;
the sealing rubber ring comprises a 1-straight line first edge, a 2-straight line second edge, a 3-straight line third edge, a 4-curved line fourth edge, a 5-curved line fifth edge, a 6-straight line sixth edge, a 7-annular cavity, an 8-first straight line edge, a 9-second curved line edge, a 10-third straight line edge, an 11-fourth curved line edge, a 12-pipe body, a 13-spigot end, a 14-socket end, a 15-annular groove and a 16-special-shaped sealing rubber ring.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Referring to fig. 1-3, a steel bell concrete pipe with a special-shaped sealing rubber ring includes a pipe body 12, a socket end 13 disposed at one end of the pipe body, and a bell end 14 disposed at the other end of the pipe body, wherein two rings of parallel annular grooves 15 with different sizes are further disposed on an outer side wall surface of the socket end 13, and the two rings of annular grooves 15 are respectively a first annular groove close to an end portion of the socket end and a second annular groove far away from the end portion of the socket end relative to the first annular groove. A special-shaped sealing rubber ring 16 is arranged in the annular groove 15.
The utility model discloses in, respectively be provided with a dysmorphism sealing rubber ring 16 in two rings of annular grooves 15 respectively, compare in traditional offer round annular groove on socket end outside wall to be provided with sealing rubber ring in this round annular groove, the utility model discloses well two rings of dysmorphism sealing rubber ring's setting has ensured that connection performance and sealing performance between socket end and the socket end are more stable more durable.
The special-shaped sealing rubber ring 16 is a special-shaped annular component, the axial section of the special-shaped annular component is a first irregular shape formed by surrounding six edges in the same plane, and the first irregular shape comprises:
a linear first side 1;
the second side 2 of the straight line is perpendicular to the first side 1 of the straight line, the first end of the second side 2 of the straight line is connected with the first end of the first side 1 of the straight line;
the straight line third edge 3 is arranged in parallel with the straight line first edge 1, the straight line third edge 3 and the straight line first edge 1 are both positioned at the same side of the straight line second edge 2, the first end of the straight line third edge 3 is connected with the second end of the straight line second edge 2, and the length of the straight line third edge is the same as that of the straight line first edge;
the arc-shaped bulge of the arc-shaped fourth side 4 faces the direction of the first side 1 of the straight line, and the first end of the arc-shaped fourth side 4 is connected with the second end of the third side 3 of the straight line;
a fifth arc edge 5, wherein the arc-shaped bulge of the fifth arc edge 5 faces the direction of the third straight edge 3, the first end of the fifth arc edge 5 is connected with the second end of the fourth arc edge 4, and the arc length of the fifth arc edge 5 is smaller than that of the fourth arc edge 4; and the straight line sixth edge 6 is obliquely arranged with the straight line second edge 2, the first end of the straight line sixth edge 6 is connected with the second end of the arc line fifth edge 5, and the second end of the straight line sixth edge 6 is connected with the second end of the straight line first edge 1.
During the use, respectively overlap in first annular groove and the annular groove of second and inlay a dysmorphism sealing rubber ring 16, dysmorphism sealing rubber ring 16 syntropy sets up in two annular grooves 15, the utility model discloses well dysmorphism sealing rubber ring 16 arrangement mode on annular groove 15 is: the arc-shaped convex direction of the fourth arc-shaped side 4 is consistent with the jacking direction of the socket end 13, namely the first side 1 of the straight line is closer to the end surface of the socket end 13 relative to the third side 3 of the straight line. This sealed rubber ring sharp second limit 2 laminates with the tank bottom of annular groove 15 mutually, carry the spigot end 13 to the female end 14 top, the interior lateral wall face of sharp sixth limit 6 and female end 14 laminates mutually, because the arc arch of pitch arc fourth side 4 is protruding towards the direction at the first limit 1 place of straight line, the sunken cavity of arc that this arc protruding department can form so, this cavity makes sealed rubber ring compressed easily, so, it is easier when carrying the spigot end 13 top into female end 14, greatly reduced the degree of difficulty of butt joint installation. In addition, the arrangement mode of the special-shaped sealing rubber ring on the annular groove 15 has the advantages that: because the straight line sixth edge 6 has a certain inclination angle during jacking installation, the compressed distance of the sealing rubber ring in the radial direction is increased along with the jacking process, and the jacking installation is easier.
The manner in which the outer surface of the barrel is provided with the annular groove is known in the art and will not be described further herein. The annular groove may be formed on the outer wall surface of the socket end during production, processing and manufacturing, or may be formed on the outer wall surface of the socket end by a grooving machine or a grooving tool, and the grooving mode is the prior art in the field and is not described herein again.
An annular cavity 7 is also arranged in the special-shaped annular component. The utility model discloses in, this annular cavity 7's axial section can be regular shape, such as circular, triangle-shaped, trapezoidal, rectangle etc. and this annular cavity 7's axial section can also be irregularly shaped's dysmorphism, for example this shape is: the middle of the rectangular body is rectangular, two sides of the rectangular body are respectively connected with two semi-circular shapes, and the two semi-circular arc-shaped protrusions are arranged back to back.
The shape of one profile in this embodiment is as follows: the axial section of the annular cavity 7 is a second irregular shape which is formed by enclosing four sides in the same plane, and the second irregular shape comprises:
a first straight edge 8; a second arc-shaped edge 9, wherein a first end of the second arc-shaped edge 9 is connected with a first end of the first straight line edge 8;
a third straight line edge 10 which has the same length as the first straight line edge 8 and is arranged in parallel, wherein the first end of the third straight line edge 10 is connected with the second end of the second arc line edge 9;
a fourth arc side 11, the arc length of the fourth arc side 11 is equal to that of the second arc side 9, the first end of the fourth arc side 11 is connected with the second end of the third straight side 10, and the second end of the fourth arc side 11 is connected with the second end of the first straight side 8;
wherein, the arc-shaped protrusion of the second arc line edge 9 is arranged opposite to the arc-shaped protrusion of the fourth arc line edge 11.
The arrangement of the annular cavity 7 enables the sealing rubber ring to be easily compressed, so that the pipeline with the smaller-size end is more easily jacked into the pipeline with the larger-size end, and the difficulty of butt joint installation is greatly reduced.
The utility model discloses when using, the spigot end 13 of a steel bellmouth concrete pipe is pegged graft to another steel bellmouth concrete pipe's bell end 14's working process does: with spigot end 13 to spigot end 14 top advance, the sharp sixth limit 6 of dysmorphism sealing rubber ring at first contacts with the 14 inside wall faces of spigot end, and along with advancing the process and going on, sealing rubber ring is radial ascending compressed distance increases along with advancing the process along with the top, annular cavity 7 and the arc sunken cavity that the arc arch of pitch arc fourth edge 4 department formed make special-shaped sealing rubber ring easier when compressed, annular cavity 7 and arc sunken cavity all are in by the compression state, and, because the sharp sixth limit 6 has certain inclination when advancing, spigot end 13 top into spigot end 14's process is easier.
The utility model discloses when using, after two pipeline docks are accomplished, because this dysmorphism sealing rubber ring is made for the elasticity material, the pitch arc fourth edge 4 that is compressed on the dysmorphism rubber ring and annular cavity 7 all have the trend of reseing, the dysmorphism sealing rubber ring that is compressed promptly has the reaction force to socket end 13 and the socket end 14 rather than contacting, this reaction force is used in the interior lateral wall face of annular groove tank bottom and socket end, make and have bigger sliding resistance between socket end 13 and the socket end 14, have better limiting action to the pipeline at the ascending slip of axial. The connecting pipeline is not easy to be influenced by factors such as uneven foundation settlement, pressure change in the pipeline and the like to generate relative sliding in the axial direction, and the stability of pipeline connection is greatly improved.
In this embodiment, the female end 13 or the female end 14 at two ends of the same pipe has the following combination forms according to the material of the female end or the female end:
the female end 13 and the female end 14 are both made of concrete; or, the female end 13 is made of steel, and the female end 14 is made of concrete; alternatively, the female end 13 and the female end 14 are both made of steel.
The utility model discloses an annular cavity 7 and fourth pitch arc limit 4 that dysmorphism sealing rubber ring 16 had make the socket end easier with the socket end when butt joint installation, all are provided with special-shaped sealing rubber ring in two rings of annular recess 15, and sealed effect is better. And after the installation is finished, the annular cavity 7 and the fourth arc edge 4 of the compressed special-shaped sealing rubber ring 16 have the tendency of resetting, the sliding resistance between the socket end 13 and the socket end 14 is larger, the pipeline is not easy to move axially, and the connection stability of the pipeline is greatly improved.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (7)

1. The utility model provides a steel bell mouth concrete pipe with dysmorphism sealing rubber ring, its characterized in that, includes the body, sets up at the socket end of body one end, sets up the socket end at the body other end, annular groove has still been seted up on the outside wall of socket end, be provided with special-shaped sealing rubber ring in the annular groove, special-shaped sealing rubber ring is special-shaped annular member, the axial profile of special-shaped annular member is for enclosing the first irregular shape that forms by six limits in the coplanar, first irregular shape includes:
a linear first side;
the first end of the first side of the straight line is connected with the first end of the second side of the straight line;
the third side of the straight line is parallel to the first side of the straight line, the third side of the straight line and the first side of the straight line are both positioned at the same side of the second side of the straight line, the first end of the third side of the straight line is connected with the second end of the second side of the straight line, and the third side of the straight line and the first side of the straight line have the same length;
the arc protrusion of the arc fourth edge faces the direction of the first edge of the straight line, and the first end of the arc fourth edge is connected with the second end of the third edge of the straight line;
the arc protrusion of the fifth side of the arc line faces the direction of the third side of the straight line, the first end of the fifth side of the arc line is connected with the second end of the fourth side of the arc line, and the arc length of the fifth side of the arc line is smaller than that of the fourth side of the arc line; and the number of the first and second groups,
the first end of the first side of the straight line is connected with the second end of the fifth side of the arc line, and the second end of the second side of the straight line is connected with the second end of the first side of the straight line.
2. The steel bell concrete pipe having a shaped packing rubber ring of claim 1, wherein the annular grooves comprise a first annular groove near the end of the spigot end and a second annular groove far from the end of the spigot end relative to the first annular groove, the first and second annular grooves being parallel to each other and equal in size.
3. The steel bell mouth concrete pipe with the special-shaped sealing rubber ring as claimed in claim 1, wherein an annular cavity is further formed in the special-shaped annular member.
4. The steel bell concrete pipe with the profiled bead seal of claim 3 wherein the annular cavity has an axial cross-section of: the middle of the rectangular body is rectangular, two sides of the rectangular body are respectively connected with two semi-circular shapes, and the two semi-circular arc-shaped protrusions are arranged back to back.
5. The steel bell concrete pipe with the profiled sealing rubber ring as claimed in claim 1, wherein the bell end and the spigot end are both made of concrete.
6. The steel bell concrete pipe with the shaped packing rubber ring of claim 1, wherein the bell end is steel and the spigot end is concrete.
7. The steel bell concrete pipe with profiled bead seal of claim 1 wherein the bell end and spigot end are both steel.
CN202021793769.0U 2020-08-25 2020-08-25 Steel-socket concrete pipeline with special-shaped sealing rubber ring Active CN213117923U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021793769.0U CN213117923U (en) 2020-08-25 2020-08-25 Steel-socket concrete pipeline with special-shaped sealing rubber ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021793769.0U CN213117923U (en) 2020-08-25 2020-08-25 Steel-socket concrete pipeline with special-shaped sealing rubber ring

Publications (1)

Publication Number Publication Date
CN213117923U true CN213117923U (en) 2021-05-04

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ID=75657280

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021793769.0U Active CN213117923U (en) 2020-08-25 2020-08-25 Steel-socket concrete pipeline with special-shaped sealing rubber ring

Country Status (1)

Country Link
CN (1) CN213117923U (en)

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TR01 Transfer of patent right

Effective date of registration: 20210805

Address after: 255200 No. 333, West Outer Ring Road, Boshan District, Zibo City, Shandong Province

Patentee after: SHANDONG LONGQUAN PIPELINE ENGINEERING Co.,Ltd.

Address before: 255000 room 2035, No.1, yanjiefang, Jinxin Yindu garden, no.348, Liuquan Road, high tech Zone, Zibo City, Shandong Province

Patentee before: Shandong Zequan scientific engineering Industrial Technology Research Institute Co.,Ltd.

Patentee before: SHANDONG LONGQUAN PIPELINE ENGINEERING Co.,Ltd.

TR01 Transfer of patent right