A pipe joint stop device

Abstract

The present invention belongs to the field of supporting equipment for tunnel and pipe well excavation equipment, and particularly relates to a pipe joint anti-retreat device, which comprises an anti-retreat platform, which comprises a fixed part and a rotating part, and the rotating part is provided with more than two latches for inserting into grouting holes of the pipe joint to be stopped and cooperating with each other to hold the pipe joint, and each of the latches extends along the radial direction of the rotating part; or, the anti-retreat platform has only a fixed part, and a latch group is provided on the fixed part, and the number and relative position of the latch groups meet the requirement that when the pipe joint to be stopped is arranged at different angles, at least one latch of the latch group can be directly opposite to the grouting hole of the pipe joint to be stopped, and because the latch is inserted into the grouting hole of the pipe joint, no radial force is applied to the pipe joint, thereby not affecting the structural strength of the pipe joint, and at the same time, because the pipe joint generally has a grouting hole, the pipe joint anti-retreat device has higher versatility.

Description

Technical Field

[0001] The invention belongs to the field of supporting equipment for tunnel and pipe well excavation equipment, and in particular relates to a pipe joint retreat prevention device. Background Art

[0002] In the process of civil engineering construction, vertical shaft excavation is often involved, such as the excavation of municipal drainage channels. At present, the commonly used mechanized construction method of vertical shaft is the jacking method of excavation from bottom to top. During the construction process, the jacking method uses a jack to lift the vertical shaft pipe section upward, and the vertical shaft pipe section pushes the tunnel boring machine upward to dig upward, while achieving the reinforcement and protection of the shaft wall.

[0003] In specific operations, after completing the lifting of one pipe section, the jack needs to be retracted downward to place and lift the next pipe section on the jack. During the retraction of the jack, the pipe section in the shaft must be prevented from retreating. To achieve this purpose, the prior art will use corresponding pipe section anti-retraction devices to cooperate with the pipe jacking machine. For example, a Chinese utility model patent with authorization announcement number CN211821011U and authorization announcement date October 30, 2020 discloses a vertical jacking anti-retraction device for a riser. The anti-retraction device has a pair of clamps suspended at the wellhead of the shaft. The clamps clamp the pipe section tightly and apply a vertical upward friction force to the outer surface of the pipe section to prevent the shaft pipe section from retreating. In addition, a Chinese utility model patent with authorization announcement number CN210266161U and authorization announcement date April 7, 2020 discloses a vertical jacking device in a horizontal steel jacking pipe, which prevents the pipe section from retreating through a temporary stop mechanism. Specifically, the temporary stop mechanism includes a round steel as a latch, and the round steel cooperates with the end stop fixing ring at the lower part of the pipe section. The round steel is inserted into the end stop fixing ring along the radial direction of the pipe section to drag the pipe section to prevent the pipe section from retreating.

[0004] For the above-mentioned vertical jacking and anti-retraction device for the riser that prevents the pipe joint from retreating by applying friction force through clamping, the reliability of its operation depends on the magnitude of the clamping force applied to the pipe joint. The greater the clamping force, the more reliable the anti-retraction can be achieved. However, the clamping force is a harmful force to the structure of the pipe joint itself. The greater the clamping force, the greater the impact on the structural strength of the pipe joint. In severe cases, the pipe joint may even be fractured. That is, although the anti-retraction device with such working principle has high versatility, it has the risk of destroying the strength of the pipe joint. For the above-mentioned vertical jacking device in the horizontal steel jacking pipe, its anti-retraction mechanism relies on the cooperation with the annular groove-shaped end anti-retraction fixing ring at the bottom of the pipe joint, which is special and cannot be applied to the pipe joint without an annular groove-shaped end anti-retraction fixing ring at the bottom. That is, although such an anti-retraction device will not cause damage to the pipe joint, it has the technical problem of poor versatility. In summary, the pipe joint anti-retraction device in the prior art cannot simultaneously meet the requirements of low damage to the pipe joint and high versatility. Summary of the invention

[0005] The object of the present invention is to provide a pipe joint anti-retraction device to solve the technical problem that the pipe joint anti-retraction device in the prior art cannot simultaneously meet the requirements of low damage to the pipe joint structure strength and high versatility.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the pipe joint anti-retraction device provided by the present invention is:

[0007] A pipe joint stop retreat device, comprising a stop retreat platform, the stop retreat platform comprising a fixed part and a rotating part, the stop retreat platform can be coaxially arranged in the pipe joint to be stopped, or provided with a center hole so as to be able to be sleeved outside the pipe joint to be stopped, the fixed part comprises a bracket for supporting on the ground or wall foundation or a hanger for hanging at the hole where the pipe joint to be stopped is located, the rotating part is provided with more than two grouting holes for inserting into the pipe joint to be stopped and the pins for cooperating with each other to hold the pipe joint, each of the pins extending along the radial direction of the rotating part; or the stop retreat platform has only a fixed part The anti-retreat platform can be arranged in the pipe section to be stopped, or be provided with a center hole so that it can be ring-circled outside the pipe section to be stopped, or be a split structure that is partially arranged in the pipe section to be stopped and partially arranged outside the pipe section to be stopped. A pin group is arranged on the fixed part, and the pin group includes more than two pins extending along the radial direction of the pipe section to be stopped for inserting into the grouting holes of the pipe section to be stopped and cooperating with each other to support the pipe section. The number and relative positions of the pin groups meet the requirement that when the pipe section to be stopped is arranged at different angles, at least one pin of the pin group can be directly opposite to the grouting hole of the pipe section to be stopped.

[0008] The beneficial effect is: a latch is arranged on the anti-retreat platform and cooperates with the grouting hole on the pipe section to be stopped to hold the pipe section to be stopped, thereby preventing the pipe section from retreating. Since the latch is inserted in the grouting hole of the pipe section, no radial force is applied to the pipe section, thereby not affecting the structural strength of the pipe section. At the same time, since the pipe sections generally have grouting holes, a latch is arranged on the anti-retreat platform and cooperates with the grouting hole to utilize the grouting hole of the pipe section to achieve the anti-retreat of the pipe section, making the pipe section anti-retreat device more versatile. Since the splicing seams of two adjacent pipe sections need to be staggered along the circumference of the pipe section when arranging, the latch is correspondingly arranged on the rotatable part of the anti-retreat platform or multiple groups of latches are arranged so that the anti-retreat platform can cooperate with pipe sections with different grouting holes facing different directions, thereby ensuring that the pipe section anti-retreat device can continue to work without adjusting the installation position.

[0009] As a further improvement, the anti-retreat platform includes a fixed part and a rotating part, and the positions of the pins on the rotation axis of the rotating part are the same; or, the anti-retreat platform has only a fixed part, and the pins of each pin group are in the same axial position of the pipe section to be prevented from retreating.

[0010] The beneficial effect is that in actual engineering, the grouting holes on the pipe joints are mostly located at the same height. The pins on the anti-retreat platform are unified in elevation so that the pipe joint anti-retreat device can be adapted to most types of pipe joints, ensuring that the pipe joint anti-retreat device has good versatility.

[0011] As a further improvement, each of the latches is transmission-connected to a latch driving device for driving the latch to reciprocate so as to be inserted into or pulled out of the corresponding grouting hole.

[0012] The beneficial effects are: a driving device is provided to drive the action of the latch, thereby improving the degree of automation of the pipe joint anti-retraction device, eliminating the need for operators to manually insert and remove the latch, reducing the labor intensity of operators, and improving the convenience of using the pipe joint anti-retraction device.

[0013] As a further improvement, the latch driving device is a telescopic oil cylinder or a telescopic air cylinder.

[0014] The beneficial effects are: the telescopic oil cylinder and the telescopic air cylinder are easy to arrange and can output a stable driving force.

[0015] As a further improvement, one end of each of the bolts connected to the bolt driving device is respectively provided with a connecting body extending along its radial direction, and two or more of the bolt driving devices are connected via the connecting body, and each of the bolt driving devices is arranged around the circumference of the corresponding bolt.

[0016] The beneficial effect is that more than two latch driving devices are provided for one latch, which can provide sufficient driving force for the latch. At the same time, the circumferential arrangement of the latch driving devices around the latch ensures that the resultant force of the latch driving devices coincides with the axis of the latch, thereby preventing the latch from being deflected by force and causing poor movement or jamming.

[0017] As a further improvement, the retreat-stopping platform includes a fixed part and a rotating part, the rotating part includes a top plate, a bottom plate and a rib plate arranged between the top plate and the bottom plate, and the rib plate is provided with a guide sleeve corresponding to each of the pins; or, the retreat-stopping platform has only a fixed part, the fixed part includes a fixed top plate, a fixed bottom plate and a rib plate arranged between the fixed top plate and the fixed bottom plate, and the rib plate is provided with a guide sleeve corresponding to each of the pins.

[0018] The beneficial effect is that the structure of the top plate, bottom plate and rib plate has reliable structural strength, which ensures that the backstop has reliable bearing capacity while providing a high structural strength installation base for the latch. Specifically, the guide sleeve can ensure smooth movement of the latch.

[0019] As a further improvement, the rib plate includes an annular rib plate and a radial rib plate which are sleeved around the axis of the pipe section to be stopped, and the guide sleeve is fixed on the annular rib plate.

[0020] The beneficial effect is that annular ribs and radial ribs are simultaneously arranged between the top plate and the bottom plate to form a criss-cross reinforcement structure between the top plate and the bottom plate, ensuring that the structure composed of the top plate, the bottom plate and the ribs has sufficient structural strength both radially and axially.

[0021] As a further improvement, the retreat-stopping platform includes a fixed part and a rotating part, the fixed part includes a support plate, and a bearing structure is formed between the base plate and the support plate or a bearing is provided.

[0022] The beneficial effect is: a bearing structure or a bearing is directly arranged between the base plate of the rotating part and the fixed part, so that the bearing or the bearing structure can fully support the rotating part, and there is a larger force matching area between the rotating part and the bearing or the bearing structure, thereby ensuring that the retreat stop table has a higher load-bearing capacity.

[0023] As a further improvement, at least one of the bottom plate and the support plate is provided with a flange that cooperates with the other to form a roller cavity, and a roller is provided in the roller cavity so that the bottom plate and the support plate form the bearing structure.

[0024] The beneficial effect is that compared with additionally setting bearings, the anti-retraction platform has a simpler structure by setting flanges on the bottom plate and / or the support plate to enclose a roller cavity and by setting rollers in the roller cavity to form a bearing structure.

[0025] As a further improvement, one end of the latch pin for inserting into the grouting hole of the pipe section to be withdrawn has a chamfered structure.

[0026] The beneficial effect is that a chamfered structure is provided on one end of the plug for inserting into the grouting hole of the pipe section to be stopped, which can guide the insertion of the plug into the grouting hole and improve the convenience of using the pipe section stop retreat device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a diagram showing the use status of the pipe segment anti-retraction device embodiment 1 of the present invention;

[0028] Figure 2 It is a top view of a cross section of the pipe segment anti-retraction device embodiment 1 of the present invention in the use state;

[0029] Figure 3 It is a schematic structural diagram of the matching between the latch and the connector of the pipe section anti-retraction device in Embodiment 1 of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the bearing structure of the pipe section anti-retraction device embodiment 1 of the present invention;

[0031] Figure 5 This is a state diagram of the jack retreating when the pipe section stop device embodiment 1 of the present invention is used;

[0032] Figure 6 This is a diagram showing the use state of a subsequent pipe segment when the pipe segment anti-retraction device embodiment 1 of the present invention is in use and the subsequent pipe segment is placed on the jack;

[0033] Figure 7 This is a state diagram of the bolt after the pipe section retreat prevention device embodiment 1 of the present invention has retreated;

[0034] Figure 8 A state diagram showing that the latch pin of the pipe segment anti-retraction device embodiment 1 of the present invention is aligned with the grouting hole of the subsequent pipe segment;

[0035] Fig. 9 This is a diagram showing the use status of the pipe segment anti-retraction device embodiment 2 of the present invention;

[0036] Fig.10 This is a diagram of the split type of the pipe joint anti-retraction device embodiment 3 of the present invention in use;

[0037] Fig.11 It is a structural schematic diagram of the bearing structure of the pipe segment anti-retraction device embodiment 7 of the present invention;

[0038] Fig.12 This is a diagram showing the use status of the pipe segment anti-retraction device embodiment 8 of the present invention;

[0039] Fig.13 This is a diagram showing the use status of the pipe segment anti-retraction device embodiment 9 of the present invention;

[0040] Description of reference numerals:

[0041] 1. Fixed part; 2. Rotating part; 3. Pipe joint; 4. Support plate; 5. Bracket; 6. Bottom plate; 7. Top plate; 8. Annular rib plate; 9. Radial rib plate; 10. Latch; 11. Grouting hole; 12. Guide sleeve; 13. Telescopic cylinder; 14. Connector; 15. Chamfered structure; 16. Roller; 17. Jack; 18. Joint; 19. Lining plate; 21. Fixed part; 22. Rotating part; 31. Outer part; 32. Inner part; 33. Fixed top plate; 34. Fixed bottom plate; 35. Fixed rib plate; 41. Support plate; 42. Bottom plate; 51. Mounting frame. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0044] It should be noted that relational terms such as "first" and "second" that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, elements defined by the sentence "including a...", etc., do not exclude the process or method that includes the elements.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The present invention is further described in detail below in conjunction with embodiments.

[0048] The specific embodiment 1 of the pipe joint anti-retraction device provided by the present invention, in this embodiment, the structure and usage of the pipe joint anti-retraction device in the present invention are introduced by taking the use in conjunction with the pipe jacking machine for excavating a vertical shaft as an example, as follows:

[0049] like Figure 1 As shown, the pipe joint anti-retraction device includes an anti-retraction platform, which includes a fixed part 1 and a rotating part 2. Figure 2As shown, the stop platform is annular in shape, and the middle part is a central hole for avoiding the pipe section 3 to be stopped. When in use, the rotation axis of the rotating part 2 is coaxially arranged with the pipe section 3 to be stopped or the axis of the excavated shaft. Figure 1 As shown, it includes a support plate 4 and a bracket 5 fixed on the lower side of the support plate 4. When in use, the bracket 5 is supported on the tunnel floor to realize the arrangement of the retreat-stopping platform at the corresponding working position.

[0050] The rotating part 2 specifically includes a bottom plate 6, a top plate 7 and a rib plate fixedly connected between the bottom plate 6 and the top plate 7. In this embodiment, a lining plate 19 is further provided on the bottom plate 6, and the rib plate is specifically connected to the lining plate 19. Regarding the structure of the rib plate, as shown in FIG. Figure 1 and Figure 2 As shown, the ribs specifically include annular ribs 8 and radial ribs 9. The annular ribs 8 are arranged around the rotation axis of the rotating part 2, and the radial ribs 9 are arranged along the radial direction of the rotating part 2. In this embodiment, two circles of annular ribs 8 are nested inside and outside. In order to cooperate with the pipe section 3 to be stopped, the rotating part 2 is provided with a plug 10 extending along the radial direction of the rotating part 2. Regarding the number of the plugs 10, in this embodiment, based on the six grouting holes 11 on the pipe section 3 to be stopped, six plugs 10 are provided on the rotating part 2. Like the arrangement of the six grouting holes 11, the six plugs 10 are arranged at equal intervals along the circumference of the rotating part 2, and the angle between two adjacent plugs 10 is 60°. The provision of the lining plate 19 can strengthen the structure of the bottom plate 6. In other embodiments, when the structural strength of the bottom plate meets the requirements, the lining plate may not be provided.

[0051] In this embodiment, the latch 10 is arranged on the annular rib 8 along the radial direction of the rotating part 2. To ensure that the latch 10 can smoothly reciprocate, a guide sleeve 12 is arranged on the annular rib 8, and the latch 10 is inserted into the guide sleeve 12. As for the positional relationship of each latch 10 in the extension direction of the rotation axis of the rotating part 2, in this embodiment, the positions of each grouting hole 11 of the pipe section 3 to be stopped in the axial direction of the pipe section 3 are consistent, and the positions of each latch 10 in the extension direction of the rotation axis of the rotating part 2 are the same. As for the number of latches, in other embodiments, combined with the actual structure of the pipe section, it can be adaptively increased or decreased. Specifically, the number of latches can be less than the number of grouting holes on the pipe section to be stopped. At the same time, since multiple latches are required to cooperate when stopping the withdrawal of the pipe section, the number of latches should not be less than two. In other embodiments, there can also be only annular ribs or radial ribs between the bottom plate and the top plate. As for the arrangement of the latch, a base for installing the latch can be specially arranged in the space between the top plate and the bottom plate.

[0052] In order to drive the bolt 10 to reciprocate, a bolt driving device is provided for each bolt 10. In this embodiment, Figure 1As shown, the bolt driving device provided for the bolt 10 is specifically a telescopic oil cylinder 13. In this embodiment, in order to ensure that sufficient driving force can be provided for the bolt 10, two telescopic oil cylinders 13 are provided for each bolt 10. Specifically, Figure 1 and Figure 3 As shown, a rigid connector 14 is fixed to one end of the latch 10 facing away from the pipe section 3 to be stopped, and the connector 14 cooperates with the latch 10 to form a structure with a T-shaped cross-section. Two telescopic cylinders 13 are arranged at intervals along the circumference of the latch 10 and are connected to the connector 14 through a push rod to jointly drive the latch 10 to move. In this embodiment, in order to ensure that the structure of the stop platform is as simple as possible, the cylinder body of the telescopic cylinder 13 is fixed on the annular rib plate 8, and the annular rib plate 8 is used as the mounting base of the telescopic cylinder 13. As for the number of telescopic cylinders, it can be greater than two in other embodiments. In addition, in order to ensure that the latch 10 can be smoothly inserted into the grouting hole 11 of the pipe section 3 to be stopped, as shown in FIG. Figure 3 As shown, a chamfered structure 15 is provided at one end of the plug 10 for inserting into the grouting hole 11 .

[0053] In order to enable the rotating part 2 to rotate relative to the fixed part 1, in this embodiment, as shown in FIG. Figure 4 As shown, the inner and outer edges of the annular support plate 4 of the fixed part 1 are turned up, and correspondingly, the inner and outer edges of the annular bottom plate 6 of the rotating part 2 are turned down, and the bottom plate 6 is buckled on the support plate 4 to enclose a roller cavity, and a roller 16 is arranged in the roller cavity. The bottom plate 6, the support plate 4 and the roller 16 cooperate to form a bearing structure, so that the rotating part 2 can rotate relative to the fixed part 1.

[0054] When used specifically, Figure 1 As shown, in cooperation with the pipe jacking machine, after the jack 17 pushes the pipe section 3 to the set position, the telescopic cylinder 13 is operated to drive the pin 10 to be inserted into the grouting hole of the pipe section 3 to support the pipe section 3 to prevent the pipe section 3 from retreating when the jack 17 retreats. Before the pin 10 is inserted into the grouting hole 11, if the pin 10 is not aligned with the grouting hole 11 on the pipe section 3, the rotating part 2 is rotated to adjust the positional relationship between the pin 10 and the grouting hole 11 of the pipe section 3 until they are aligned. Then as shown in FIG. Figure 5 As shown in the figure, the jack 17 is retracted. After the jack 17 is retracted into place, Figure 6As shown, the next pipe section is assembled and placed on the jack, and this pipe section is defined as the subsequent pipe section. As for the operation method of placing the pipe section on the jack, the pipe section can be placed on the jack by assembling the pipe segments into the pipe section on the jack, so that the size requirement of the distance between the two adjacent brackets 5 on the lower side of the support plate 4 is lower. Of course, since the stop-retreat platform in this embodiment is sleeved outside the pipe section, the outer diameter of the stop-retreat platform can be designed to be relatively large. Naturally, the distance between the two adjacent brackets 5 on the lower side of the support plate 4 can be designed to be larger than the outer diameter of the pipe section, so that the pipe segments can be assembled into the pipe section first and then the pipe section can be moved to the jack 17 through the gap between the two adjacent legs.

[0055] Since the pipe segment 3 is assembled from pipe segments, it has the following characteristics: Figure 2 As shown in the splicing seam 18, the splicing seams of two adjacent pipe sections 3 need to be staggered in the circumferential direction of the pipe section 3. Therefore, the splicing seam 18 of the subsequent pipe section and the splicing seam 18 of the pipe section 3 stopped by the bolt 10 are staggered in the circumferential direction of the pipe section 3. Naturally, the grouting holes 11 of the subsequent pipe section and the grouting holes 11 of the pipe section 3 stopped by the bolt 10 are staggered in the circumferential direction of the pipe section 3. Push the subsequent pipe section upward until its upper end presses against the lower end of the pipe section 3 stopped by the bolt 10. Figure 7 As shown, the telescopic cylinder 13 is operated to drive the latch 10 to be pulled out from the grouting hole 11 of the pipe section 3, and the jack 17 pushes the subsequent pipe section into the shaft, and then, as shown in FIG. Figure 8 As shown, the rotating part 2 is rotated to align the latch 10 with the grouting hole 11 of the subsequent pipe segment, and the above operation is repeated to complete the insertion of each pipe segment 3 into the shaft until the shaft construction is completed. When the latch 10 is inserted into the grouting hole 11 of the pipe segment 3, it can be determined whether the pipe segment is tilted according to the matching condition of the latch 10 and the grouting hole 11, so as to adjust the posture of the pipe segment 3 in time.

[0056] In this embodiment, the structure and use method of the pipe segment anti-retreat device in the present invention are introduced by taking the excavation of a vertical well as an example. Based on its structure and working principle, the pipe segment anti-retreat device can also be used in conjunction with a pipe jacking machine for excavating wells in other axial extension directions, such as horizontal wells and inclined wells.

[0057] As for the method of driving the rotating part 2 to rotate relative to the fixed part 1, manual drive can be used. Of course, a mechanical drive mechanism can also be set between the rotating part 2 and the fixed part 1 to drive the rotating part to rotate. For example, an arc-shaped rack is set on the outer peripheral surface of the bottom plate 6 of the rotating part 2, a motor is fixed on the fixed part, and a gear meshing with the arc-shaped rack is fixed on the power output shaft of the motor.

[0058] The specific embodiment 2 of the pipe joint anti-retraction device provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the anti-retraction platform has a central hole for avoiding the pipe joint, so the anti-retraction platform is sleeved outside the anti-retraction pipe joint. Fig. 9 As shown, the stop platform includes a fixed part 21 and a rotating part 22, and the radial dimensions of the fixed part 21 and the rotating part 22 are smaller than the inner diameter of the pipe segment 3 to be stopped, so that the rotation axis of the stop platform rotating part 22 is coaxially arranged with the axis of the pipe segment 3 to be stopped in the pipe segment 3. Of course, based on the function of the pipe segment stop device in the present invention to prevent the pipe segment from retreating, the pipe segment stop device in the present invention can be applied to any other construction that needs to prevent the pipe segment from retreating, such as in the construction of a vertical shaft excavated by a shield machine. After the excavation is completed, the negative ring pipe segment between the vertical shaft and the main tunnel used to support the shield machine during the excavation process needs to be removed. Since the excavation process will arrange pipe segments in the vertical shaft on the basis of the negative ring pipe segment as the shield machine advances, therefore, when removing the negative ring pipe segment, it is necessary to prevent the pipe segments arranged in the vertical shaft from retreating. At this time, the pipe segment stop device is lowered into the well, and the pipe segments on the well wall are supported by the pipe segment stop device before the negative ring pipe segment is removed. After the pipe joint stop device is lowered into the well, if the latch pin 10 is not aligned with the grouting hole on the pipe joint to be supported, the latch pin 10 can be aligned with the grouting hole on the pipe joint to be supported by rotating the rotating part 22 .

[0059] The specific embodiment 3 of the pipe joint anti-retreat device provided by the present invention is different from the above-mentioned embodiments 1 and 2 mainly in that: in embodiments 1 and 2, in order to adapt to the staggered arrangement of the grouting holes of two adjacent pipe joints in the circumferential direction of the pipe joint, the anti-retreat platform is divided into a fixed part and a rotating part, and the pin is set on the rotating part, and the rotation of the rotating part can adapt the grouting holes to different pipe joints in the circumferential direction of the pipe joint. In this embodiment, the anti-retreat platform only has a fixed part, and the fixed part has the same structure as the rotating part in the above embodiment. The pins are arranged on the fixed part. In order to adapt to the multi-angle arrangement of the pipe section due to the staggered seams, a pin group is arranged on the fixed part. The number of the pin groups and the relative positions in the circumferential direction of the pipe section to be stopped in retreat satisfy that no matter how the pipe section is arranged, there is at least one pin group that can cooperate with the grouting holes of the pipe section to be stopped in retreat. For example, two groups of pin groups can be set, each group of pin groups has two pins, the two pins of one group of pins are arranged at the six o'clock and twelve o'clock directions, and the two pins of the other group of pin groups are arranged at the three o'clock and nine o'clock directions, so that the two groups of pin groups can cooperate with the pipe section whose joints are arranged in a 90° staggered arrangement along the circumference of the pipe section. Based on this working method, the anti-retreat platform can be sleeved outside the anti-retreat pipe section, can be set inside the anti-retreat pipe section, or can be Fig.10The split structure shown includes an outer portion 31 located outside the pipe section 3 to be stopped and an inner portion 32 located inside the stop pipe section 3. Both the outer portion 31 and the inner portion 32 are annular structures, which ensure that the stop platform can apply uniform force to the pipe section to be stopped, and both the outer portion 31 and the inner portion 32 include a fixed top plate 33 and a fixed bottom plate 34. A fixed rib plate 35 is provided between the fixed top plate 33 and the fixed bottom plate 34, and a telescopic cylinder 13 is provided corresponding to each latch 10.

[0060] The specific embodiment 4 of the pipe joint stop device provided by the present invention is different from the above embodiments mainly in that: in the above embodiments, the latch driving device is a telescopic oil cylinder, while in this embodiment, the latch driving device is a telescopic air cylinder. In other embodiments, the latch driving device can be any other mechanized driving device that can replace manual labor, such as an electric push rod, a nut screw mechanism, etc.

[0061] The specific embodiment 5 of the pipe joint stop device provided by the present invention is different from the embodiment 1 mainly in that: in this embodiment, a bearing is provided between the rotating part and the fixed part to realize the rotation of the rotating part relative to the fixed part. Of course, in other embodiments, other structures can be used between the rotating part and the fixed part to realize the rotation of the rotating part relative to the fixed part, such as providing an annular track on the fixed part and providing a deformable roller on the rotating part that cooperates with the track.

[0062] Specific embodiment 6 of the pipe joint stopping device provided by the present invention is mainly different from embodiment 1 in that: in embodiment 1, the stopping platform matched with the pipe joint sleeve to be stopped is a circumferentially closed ring, and naturally, the center hole of the pipe joint to be stopped is a circumferentially closed hole, while in the present embodiment, the stopping platform matched with the pipe joint sleeve to be stopped is a circumferentially open C-shaped structure, and naturally, the center hole of the stopping platform used to avoid the pipe joint to be stopped is a circumferentially open hole.

[0063] The specific embodiment 7 of the pipe joint anti-retraction device provided by the present invention is different from the embodiment 1 mainly in that: in this embodiment, Fig.11 As shown, the inner and outer edges of the annular support plate 41 of the fixed part are turned up, and the annular bottom plate 42 of the rotating part is no longer provided with a turning edge structure. The bottom plate 42 covers the notch of the support plate 41 to enclose a roller cavity, and a roller 16 is arranged in the roller cavity. The bottom plate 42, the support plate 41 and the roller 16 cooperate to form a bearing structure, so that the rotating part can rotate relative to the fixed part. Of course, in other embodiments, only the inner and outer edges of the bottom plate can be provided with a downward turning edge, and the support plate is no longer provided with a turning edge, and the notch of the bottom plate is covered by the support plate to enclose the roller cavity.

[0064] The specific embodiment 8 of the pipe joint anti-retraction device provided by the present invention is different from the embodiment 1 mainly in that: in this embodiment, Fig.12 As shown, only one telescopic cylinder 13 is provided for each latch 10, and correspondingly, the connector and the latch are arranged in an L-shaped structure. In this embodiment, the telescopic cylinder 13 is still installed with the annular rib plate 8 as the installation base.

[0065] The specific embodiment 9 of the pipe joint anti-retraction device provided by the present invention is different from the embodiment 1 mainly in that: in this embodiment, Fig.13 As shown, only one telescopic cylinder 13 is provided for each latch 10. The push rod of the telescopic cylinder 13 is connected to the latch. In order to install the telescopic cylinder 13, an L-shaped mounting frame 51 is provided, the horizontal part of the L-shaped mounting frame 51 is fixed on the annular rib plate 8, and the cylinder body of the telescopic cylinder 13 is fixed on the vertical part of the L-shaped mounting frame 51.

[0066] The specific embodiment 10 of the pipe joint anti-retraction device provided by the present invention is different from the embodiment 1 mainly in that: in this embodiment, the fixed part is supported by a bracket and the wall foundation of the tunnel to realize the setting of the anti-retraction platform at the shaft opening. In other embodiments, the anti-retraction platform can also be hoisted at the shaft opening by a hoisting structure.

[0067] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipe joint stop device, Its characteristics are: It includes a stop-retreat platform, which includes a fixed part and a rotating part. The stop-retreat platform can be coaxially arranged in the pipe section to be stopped, or be provided with a center hole so that it can be looped around the outside of the pipe section to be stopped. The fixed part includes a bracket for supporting on the ground or wall foundation or a hanger for hoisting at the opening of the pipe section to be stopped. The fixed part also includes a support plate. The rotating part is provided with more than two pins for inserting grouting holes of the pipe section to be stopped and cooperating with each other to hold the pipe section, and each of the pins extends radially along the rotating part; the rotating part includes a top plate, a bottom plate and a rib plate arranged between the top plate and the bottom plate, a bearing structure is formed between the bottom plate and the support plate or a bearing is provided, the rib plate is provided with a guide sleeve corresponding to each of the pins, the rib plate includes an annular rib plate and a radial rib plate looped around the axis of the pipe section to be stopped, and the guide sleeve is fixed to the annular rib plate.

2. The pipe joint anti-retraction device according to claim 1, Its characteristics are: The positions of the latches on the rotation axis of the rotating part are the same.

3. The pipe joint anti-retraction device according to claim 1 or 2, Its characteristics are: Each of the latches is transmission-connected with a latch driving device for driving the latch to reciprocate so as to be inserted into or pulled out of the corresponding grouting hole.

4. The pipe joint anti-retraction device according to claim 3, Its characteristics are: The latch driving device is a telescopic oil cylinder or a telescopic air cylinder.

5. The pipe joint anti-retraction device according to claim 4, Its characteristics are: One end of each of the bolts connected to the bolt driving device is respectively provided with a connecting body extending along its radial direction, and two or more of the bolt driving devices are connected via the connecting body, and each of the bolt driving devices is arranged around the circumference of the corresponding bolt.

6. The pipe joint anti-retraction device according to claim 1, Its characteristics are: At least one of the bottom plate and the support plate is provided with a flange which cooperates with the other to form a roller cavity. A roller is provided in the roller cavity so that the bottom plate and the support plate form the bearing structure.

7. The pipe joint anti-retraction device according to claim 1 or 2, Its characteristics are: One end of the latch pin used for inserting into the grouting hole of the pipe section to be withdrawn has a chamfered structure.

8. A pipe joint stop device, Its characteristics are: The invention comprises a stop-retreat platform, which has only a fixed part, and the fixed part comprises a fixed top plate, a fixed bottom plate and a rib plate arranged between the fixed top plate and the fixed bottom plate, and the rib plate is provided with a guide sleeve corresponding to each latch pin, and the stop-retreat platform can be arranged in the pipe section to be stopped, or be provided with a center hole so as to be able to be ring-circled outside the pipe section to be stopped, or be a split structure which is partially arranged in the pipe section to be stopped and partially arranged outside the pipe section to be stopped, and a latch pin group is arranged on the fixed part, and the latch pin group comprises more than two latch pins which extend along the radial direction of the pipe section to be stopped so as to be inserted into the grouting holes of the pipe section to be stopped and cooperate with each other to hold the pipe section, and the number and relative positions of the latch pin groups meet the requirement that when the pipe section to be stopped is arranged at different angles, the latch pins of at least one latch pin group can be directly opposite to the grouting holes of the pipe section to be stopped.

9. The pipe joint anti-retraction device according to claim 8, Its characteristics are: The positions of the pins of each pin group in the axial direction of the pipe section to be stopped are the same.

10. The pipe joint anti-retraction device according to claim 8 or 9, Its characteristics are: Each of the latches is transmission-connected with a latch driving device for driving the latch to reciprocate so as to be inserted into or pulled out of the corresponding grouting hole.

11. The pipe joint anti-retraction device according to claim 10, Its characteristics are: The latch driving device is a telescopic oil cylinder or a telescopic air cylinder.

12. The pipe joint anti-retraction device according to claim 11, Its characteristics are: One end of each of the bolts connected to the bolt driving device is respectively provided with a connecting body extending along its radial direction, and two or more of the bolt driving devices are connected via the connecting body, and each of the bolt driving devices is arranged around the circumference of the corresponding bolt.

13. The pipe joint anti-retraction device according to claim 8, Its characteristics are: The rib plate comprises an annular rib plate and a radial rib plate which are sleeved around the axis of the pipe section to be stopped, and the guide sleeve is fixed on the annular rib plate.

14. The pipe joint anti-retraction device according to claim 8 or 9, Its characteristics are: One end of the latch pin used for inserting into the grouting hole of the pipe section to be withdrawn has a chamfered structure.

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