Shear pin device of separated demolding structure

Abstract

The utility model discloses a shear pin device of a separating type demoulding structure, which comprises a shear pin, a mounting sleeve, a flange piece, a screw rod, a spacing ring, a baffle plate, a gasket, a spring, a hexagon bolt head, a protective plate and a spring pin, the shear pin is used for forming a positioning hole when a duct piece is prefabricated, and is detachably connected with the mounting sleeve through the positioning pin; by means of the detachable structure of the shear pin and the side plate, the problem that in a hinge type opening and closing mold, the long shear pin cannot be directly demolded is solved, and the problem that the long shear pin cannot be directly demolded when the shear pin is fastened by a robot can also be solved. And the screw needs to be kept horizontal.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a shear pin device for a detachable demolding structure. Background Technology

[0002] Tunnel boring machine (TBM) segments are the main assembly components in TBM construction, forming the innermost barrier of the tunnel and bearing the responsibility of resisting soil pressure, groundwater pressure, and other special loads. TBM segment production typically uses high-strength, impermeable concrete to ensure reliable load-bearing capacity and waterproofing. Production mainly utilizes precast segment molds, which are formed after the concrete is poured into a sealed container. The segment molds are made of mold steel and consist of a bottom mold, four side plates, and two cover plates; they are specialized precast concrete molds used for tunnel segment production. Some project segments are designed with positioning holes for assembly. Therefore, shear pins are installed on the side plates of the mold. After the segments are cast, positioning holes are formed on the segments. However, some segments have deeper positioning holes, so the shear pins on the mold are also longer. When the mold side plates have a hinged opening and closing structure, the longer shear pins cannot be directly removed from the segments when the segments are demolded. Therefore, a shear pin device with a separate demolding structure needs to be designed on the mold. With this separate structure, the shear pins will separate from the mold when the mold side plates are opened during the demolding of the segments. The shear pins remain in the segments and are demolded together with the segments. Finally, the shear pins are removed from the segments.

[0003] Currently, for domestic segment molds with long shear pins, the opening and closing of the mold side plates are all done using a flat-push structure, which allows for direct demolding. However, for hinged molds, long shear pins cannot be demolded directly. Therefore, in order to solve the demolding problem of shear pins in hinged molds and to solve the problem of keeping the screw horizontal when the robot is tightening the screw, a shear pin device with a separate demolding structure is proposed. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this application proposes a shear pin device for a split demolding structure to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A shear pin device with a detachable demolding structure includes a shear pin, a mounting sleeve, a flange, a screw, a spacer ring, a baffle, a gasket, a spring, a hexagonal bolt head, a protective plate, and a spring pin. The shear pin is used to form positioning holes during segment prefabrication and is detachably connected to the mounting sleeve via the positioning pin. The mounting sleeve is welded and fixed to the mold side plate and has a positioning hole inside that mates with the shear pin. A central hole for the screw to pass through is also provided in the center of the mounting sleeve. The flange is detachably connected to the mounting sleeve via bolts and has a through hole in its center coaxial with the central hole of the mounting sleeve. The screw passes through the central holes of the mounting sleeve and the flange, and one end is fixed to the shear pin. The connection is made at one end and at the other end to the hexagonal bolt head. A spacer ring is fitted onto the screw rod and welded to the flange to define the installation position of the baffle. The baffle is fitted onto the screw rod and welded to the spacer ring to limit the spring. A washer is fitted onto the screw rod and located between the baffle and the spring to limit the spring on the screw rod. The spring is fitted onto the screw rod, with one end abutting against the washer and the other end abutting against the hexagonal bolt head. The hexagonal bolt head is connected to the screw rod via a flat key and fixed to the screw rod via a spring pin to drive the screw rod to rotate. The guard plate is welded to the flange.

[0007] As a further technical solution of this utility model: the shear pin and the mounting sleeve are circumferentially positioned by a positioning pin, the positioning pin is arranged along the axial direction of the shear pin, and one end of the positioning pin is embedded in the positioning groove of the shear pin, and the other end is embedded in the positioning hole of the mounting sleeve.

[0008] As a further technical solution of this utility model: the mounting sleeve is welded to the mold side plate by a fillet weld, and the axis of the mounting sleeve is perpendicular to the surface of the mold side plate.

[0009] As a further technical solution of this utility model: the flange and the mounting sleeve are connected by at least two bolts, the bolts are evenly distributed along the circumference of the mounting sleeve, and the edge of the through hole of the flange is provided with a guide chamfer that cooperates with the screw.

[0010] As a further technical solution of this utility model: the screw and the shear pin are connected by a thread, the thread is a fine thread with a pitch of 0.5mm to 1.0mm, and the axis of the screw coincides with the axis of the shear pin.

[0011] As a further technical solution of this utility model: the spacer ring is a circular ring structure, the inner diameter is in clearance fit with the outer diameter of the screw, the outer diameter is consistent with the outer diameter of the flange, and the welding position of the spacer ring and the flange is located at the edge of the flange.

[0012] As a further technical solution of this utility model: the baffle is a circular flat plate with a through hole in the middle that cooperates with the screw, and the diameter of the baffle is larger than the outer diameter of the spring, so as to completely cover the end of the spring.

[0013] As a further technical solution of this utility model: the gasket is a flat gasket, made of stainless steel or carbon steel, with a thickness of 1mm to 3mm, and the inner diameter of the gasket is clearance-fitted with the screw, while the outer diameter is larger than the inner diameter of the spring.

[0014] As a further technical solution of this utility model: the inner side of the hexagonal bolt head is provided with a keyway that mates with the flat key. The flat key is a rectangular flat key with cross-sectional dimensions conforming to GB / T1096 standard, and the spring pin is a cylindrical pin with a diameter of Φ8mm.

[0015] As a further technical solution of this utility model: the protective plate is an arc-shaped plate that covers the outer side of the spring and the washer, and the two ends of the protective plate are welded to the flange to form a protective cavity for the spring.

[0016] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0017] This invention solves the problem of long shear pins not being able to be directly demolded in hinged molds by using a separable structure of shear pins and side plates. It also solves the problem of keeping the screw horizontal when the robot is tightening the shear pin. Attached Figure Description

[0018] Figure 1 This is a diagram showing the locking state of the shear pin device for a split demolding structure during segment casting.

[0019] Figure 2 This is a diagram showing the loosened state of the shear pin device in a split demolding structure during segment demolding.

[0020] Figure 3 This is a shear pin device for a detachable demolding structure. The diagram shows the state of the shear pin after the mold is opened.

[0021] Figure 4 This is a schematic diagram of the overall structure of the shear pin device for a split demolding structure.

[0022] In the diagram: 1. Shear pin; 2. Mounting sleeve; 3. Flange; 4. Screw; 5. Spacer ring; 6. Baffle; 7. Gasket; 8. Spring; 9. Hex bolt head; 10. Protective plate; 11. Flat washer; 12. Spring pin. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example 1, as Figure 1-4 As shown, a shear pin device with a detachable demolding structure is used to solve the problem of demolding long shear pins on hinged opening and closing molds, and also to solve the problem of keeping the screw horizontal when the robot is tightening the screw.

[0025] The shear pin device with a split demolding structure not only solves the problem of demolding long shear pins on hinged opening and closing molds, but also solves the problem of keeping the screw horizontal when the robot is tightening the screw.

[0026] The shear pin device of the split demolding structure includes a shear pin, a mounting sleeve, a flange, a screw, a spacer ring, a baffle, a gasket, a spring, a hexagonal bolt head, a protective plate, and a spring pin. The shear pin is installed with the mounting sleeve via a locating pin. The mounting sleeve is welded to the mold side plate. The flange is bolted to the mounting sleeve. The screw is connected to the shear pin through the center holes of the mounting sleeve and the flange. The spacer ring passes through the screw and is welded to the flange. The baffle passes through the screw and is welded to the spacer ring. The gasket passes through the screw and limits the spring. The hexagonal bolt head is connected to the screw via a flat key. The spring pin fixes the hexagonal bolt head to the screw. The protective plate is welded to the flange.

[0027] Shear pin 1 is installed and connected to mounting sleeve 2. Mounting sleeve 2 is welded to the mold side plate. Flange 3 is bolted to mounting sleeve 2. Screw 4 is connected to shear pin 1 through the center holes of mounting sleeve 2 and flange 3. Spacer ring 5 passes through screw 4 and is welded to flange 3. Baffle 6 passes through screw 4 and is welded to spacer ring 5. Gasket 7 passes through screw 4 and limits spring 8. Hex bolt head 9 is connected to screw 4 through flat key 11. Spring pin 12 fixes hex bolt head 11 to screw 4. Protective plate 10 is welded to flange 3. The shear pin device with a split demolding structure not only solves the problem of demolding long shear pins on hinged opening and closing molds, but also solves the problem of keeping the screw horizontal when the robot tightens the screw.

[0028] The working principle is as follows:

[0029] This detachable demolding structure uses a shear pin device to fix the shear pin to the mold side plate via a screw. After the tunnel segment is cast, the robot loosens the shear pin by rotating the hexagonal bolt head. The compression force of the spring keeps the screw and hexagonal bolt head horizontal, facilitating the robot's alignment of the hexagonal bolt head. Then, after the mold side plate opens, the shear pin separates from the side plate, remaining inside the tunnel segment and being demolded together with it. Finally, the shear pin is removed from the tunnel segment. This detachable demolding structure's shear pin device not only solves the problem of demolding long shear pins on hinged molds but also solves the problem of keeping the screw horizontal when the robot tightens it.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment have been appropriately combined to form other embodiments that are easy for those skilled in the art to understand.

Claims

1. A shear pin device for a split mold release structure comprising a shear pin, a mounting sleeve, a flange, a screw, a spacer ring, a baffle, a washer, a spring, a hex head, a shield, and a spring pin, characterized in that: The shear pin is used for forming a positioning hole when a segment is prefabricated, and is detachably connected with the mounting sleeve through a positioning pin, the mounting sleeve is welded and fixed on a side plate of a mold, and is internally provided with a positioning hole matched with the shear pin, and a central hole is formed in the middle of the mounting sleeve for the screw rod to pass through, a flange piece is detachably connected with the mounting sleeve through bolts, a through hole coaxial with the central hole of the mounting sleeve is formed in the middle of the flange piece, the screw rod passes through the central holes of the mounting sleeve and the flange piece, one end of the screw rod is fixedly connected with the shear pin, the other end of the screw rod is connected with the hexagonal bolt head, a spacing ring is sleeved on the screw rod and is welded and fixed with the flange piece, and is used for limiting the installation position of the baffle, a baffle is sleeved on the screw rod and is welded and fixed with the spacing ring, and is used for limiting the spring, a gasket is sleeved on the screw rod and is located between the baffle and the spring, and is used for limiting the spring on the screw rod, a spring is sleeved on the screw rod, one end of the spring abuts against the gasket, and the other end of the spring abuts against the hexagonal bolt head, the hexagonal bolt head is connected with the screw rod through a flat key and is fixed on the screw rod through the spring pin, and is used for driving the screw rod to rotate, and a guard plate is welded and fixed with the flange piece.

2. A shear pin device for a split mold release structure according to claim 1, wherein, The shear pin and the mounting sleeve are circumferentially positioned through the positioning pin, the positioning pin is arranged along the axial direction of the shear pin, one end of the positioning pin is embedded into a positioning groove of the shear pin, and the other end of the positioning pin is embedded into a positioning hole of the mounting sleeve.

3. The knock-out shear pin apparatus of claim 1, wherein, The mounting sleeve and the side plate of the mold are welded through a fillet weld, and the axis of the mounting sleeve is perpendicular to the surface of the side plate of the mold.

4. The knock-out shear pin arrangement of claim 1, wherein, The flange piece and the mounting sleeve are connected through at least two bolts, the bolts are uniformly distributed along the circumferential direction of the mounting sleeve, and the edge of the through hole of the flange piece is provided with a guide chamfer matched with the screw rod.

5. The knock-out shear pin arrangement of claim 1, wherein, The screw rod and the shear pin are connected through threads, the threads are fine threads, the pitch is 0.5mm-1.0mm, and the axis of the screw rod is coincident with the axis of the shear pin.

6. The knock-out shear pin arrangement of claim 1, wherein, The spacing ring is a circular ring structure, the inner diameter of the spacing ring is gap-matched with the outer diameter of the screw rod, the outer diameter of the spacing ring is consistent with the outer diameter of the flange piece, and the welding position of the spacing ring and the flange piece is located at the edge of the flange piece.

7. The knock-out shear pin arrangement of claim 1, wherein, The baffle is a circular flat plate, a through hole matched with the screw rod is formed in the middle of the baffle, and the diameter of the baffle is greater than the outer diameter of the spring, so that the end of the spring is completely covered.

8. The knock-out shear pin arrangement of claim 1, wherein, The gasket is a flat gasket, the material of the gasket is stainless steel or carbon steel, the thickness of the gasket is 1mm-3mm, the inner diameter of the gasket is gap-matched with the screw rod, and the outer diameter of the gasket is greater than the inner diameter of the spring.

9. The knock-out shear pin arrangement of claim 1, wherein, The inner side of the hexagonal bolt head is provided with a key groove matched with the flat key, the flat key is a rectangular flat key, the cross-sectional dimension meets the GB / T1096 standard, and the spring pin is a cylindrical pin with a diameter of Φ8mm.

10. The knock-out shear pin arrangement of claim 1, wherein, The guard plate is an arc-shaped plate, covers the outer side of the spring and the gasket, and the two ends of the guard plate are welded with the flange piece to form a protection cavity for the spring.

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