Mould for ductile cast iron pipe jacking outside concrete

Abstract

The utility model relates to a kind of mould for ductile cast iron pipe jacking outer package concrete, comprising: steel bucket mould, barrel-shaped metal mould with linear opening is set to natural state side;And, self-locking assembly is arranged on the linear opening, the self-locking assembly includes: first support part, for the rigid protrusion fixedly arranged in the linear opening side;Second support part, for the rigid protrusion fixedly arranged in the linear opening other side;The first support part and second support part are respectively provided with the platform parallel to the tangent line at linear opening;On the platform of the first support part and second support part, there is self-locking connecting rod that can be automatically locked by mutual cooperation, beneficial effect is: by the characteristics of half-open bucket mould, linear driving self-locking assembly is set at linear opening, the automatic shaping and form removal of mould required for ductile cast iron pipe jacking outer wall cement pouring are realized.

Description

Technical Field

[0001] This utility model belongs to the field of ductile iron pipe jacking technology, specifically relating to a mold for encasing concrete in ductile iron pipe jacking. Background Technology

[0002] Ductile iron pipe jacking typically refers to the process of using socket-joint or tongue-and-groove ductile iron pipes, welding flanges to the outer walls of the ends, welding supporting ribs to the pipe body, then attaching a circumferential metal mesh, and finally using a mold to apply a cement layer to the outer wall of the ductile iron pipe. The attached cement layer improves the overall strength of the pipe body, transmits the jacking force, and resolves the "uneven" issue caused by the socket joint on the outer wall cross-section, resulting in a pipe with a uniform outer diameter after the cement layer is applied.

[0003] Therefore, the production of ductile iron pipe jacking requires the use of molds, followed by the pouring of cement, typically fine-grained concrete or high-strength mortar. When the cement has hardened to a point where the mold can be removed, the outer mold needs to be dismantled for natural or professional curing. The inventors, in their research of existing technologies, discovered that traditional mold removal is time-consuming and labor-intensive, and can easily damage the relatively thin cement layer adhering to the outer wall of the ductile iron pipe. Furthermore, mold shaping requires manual fixing or shaping using bolts, resulting in a relatively low level of automation and hindering automated production.

[0004] Therefore, there is an urgent need for a mold for encasing concrete in ductile iron pipe jacking that can assist in automated production. Summary of the Invention

[0005] In order to overcome the problems of high manual labor intensity and low automation in the assembly and disassembly of ductile iron pipe jacking molds in the existing technology, the inventors used a non-circular metal mold in its natural state and set a self-locking component at the opening position. The assembly and disassembly of the mold were completed with the help of a driving device, thereby reducing the manual labor.

[0006] The technical solution adopted in this utility model is: a mold for encasing concrete around a ductile iron pipe jacking pipe, comprising:

[0007] A steel barrel mold is a barrel-shaped metal mold with a linear opening on one side in its natural state.

[0008] And, a self-locking assembly disposed on the linear opening, the self-locking assembly comprising:

[0009] The first support part is a rigid protrusion fixedly disposed on one side of the linear opening;

[0010] The second support is a rigid protrusion fixedly disposed on the other side of the linear opening;

[0011] The first support portion and the second support portion are respectively provided with platforms parallel to the tangent at the linear opening relative to the steel barrel mold;

[0012] On the platforms of the first and second support parts, there are self-locking linkages that cooperate with each other and can be automatically locked.

[0013] Furthermore, the self-locking linkage includes:

[0014] The fourth support is fixedly connected to the first support or a steel barrel mold on one side of the first support, and is a rigid protrusion protruding from the platform of the first support.

[0015] The lever is a C-shaped, L-shaped, or L-shaped arc lever, with one end hinged to the first support part, and can be flipped toward the other side of the steel barrel mold;

[0016] The engaging portion is a hinge shaft that protrudes from the second support platform and is parallel to the linear opening direction;

[0017] The rotating rod is a C-shaped, L-shaped, or L-shaped arc rod, with one end fixed to the engaging part, and can rotate toward the other side of the steel barrel mold;

[0018] A linear telescopic device, with its fixed end hinged to the fourth support and its telescopic end hinged to the rotating rod;

[0019] The linear telescopic device drives the rotating rod to rotate;

[0020] The end of the clamping rod facing the other side of the steel barrel mold is hinged between the linear telescopic device and the hinge point of the rotating rod and the engaging part;

[0021] When the rotary rod rotates, it drives the locking rod to rotate. The locking rod bends and hangs on the locking part, forming a clamping force to close the linear opening, and is locked by the locking rod and the locking part.

[0022] Furthermore, it also includes:

[0023] The third support is a rectangular metal cavity that is fixed inside the platform of the first support.

[0024] The third support section is equipped with a fastening spring that is parallel to the tangent at the linear opening.

[0025] The third support portion is provided with positioning holes on both sides perpendicular to the linear opening direction;

[0026] The positioning channel is a long strip-shaped hole that penetrates the side wall of the third support part, and its direction on the third support part is parallel to the tangent at the linear opening;

[0027] The positioning channel is provided with a movable part, the two ends of which are engaged in the positioning channel and can translate and rotate within the positioning channel;

[0028] The lever is fixed to the movable part and hinged relative to the first support part by means of the movable part;

[0029] One end of the fastening spring is fixed inside the third support part, and the other end is fixed on the movable part. When the rotating rod drives the locking rod to engage with the locking part, it provides a clamping force to pull the locking rod.

[0030] Furthermore,

[0031] When the steel barrel mold is in the closed state, a closing part is provided between the first support part and the second support part;

[0032] The closing part is a closed surface that is respectively provided on the first support part and the second support part and is mutually concave and convex. When the steel barrel mold is closed, the closing part is fitted.

[0033] Furthermore,

[0034] The closing part consists of protrusions fixed on the steel barrel mold on both sides of the linear opening;

[0035] The closed portion is provided with a surface that can fit against the first support portion and the second support portion. When the first support portion and the second support portion approach each other with the help of the self-locking component to close the linear opening, the clamping force generated by the approach of the first support portion and the second support portion directly acts on the closed portion.

[0036] Furthermore,

[0037] The number of self-locking components provided on the linear opening is not less than four.

[0038] Furthermore,

[0039] The opening and closing directions of the two adjacent sets of self-locking components are opposite.

[0040] Furthermore,

[0041] The linear telescopic device is a cylinder.

[0042] The advantages of this utility model over the prior art are as follows: by utilizing the characteristics of a semi-open barrel mold, a linearly driven self-locking component is set at the linear opening to realize the automatic shaping and demolding of the mold required for cement pouring on the outer wall of the ductile iron pipe jacking. Attached Figure Description

[0043] Figure 1 This is a partial enlarged view of the self-locking component according to a specific embodiment of the present invention;

[0044] Figure 2 This is a cross-sectional view of the self-locking component according to a specific embodiment of the present invention;

[0045] Figure 3 This is a top view of the mold according to a specific embodiment of the present utility model;

[0046] Figure 4 This is a front view of the mold according to a specific embodiment of the present utility model;

[0047] The annotation is represented as follows:

[0048] 100 - Steel barrel mold; 110 - First support part; 120 - Second support part;

[0049] 130 - Third support part; 131 - Fastening spring; 132 - Positioning channel; 133 - Movable part;

[0050] 140-Clamping part; 150-Clamping rod; 160-Rotating rod; 170-Fourth support part; 180-Linear telescopic device; 190-Closing part. Detailed Implementation

[0051] The technical solutions in the embodiments are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] To overcome the problems of high manual labor intensity and low automation in the assembly and disassembly of ductile iron pipe jacking molds in existing technologies, the inventors utilized a non-circular metal mold in its natural state, incorporating a self-locking component at the opening. A drive device was then used to complete the assembly and disassembly of the mold, thereby reducing manual labor. Please refer to [link / reference]. Figures 1 to 4 The specific implementation method is as follows: a mold for encasing concrete around a ductile iron pipe jacking pipe, comprising:

[0053] Steel barrel mold 100 is a barrel-shaped metal mold with a linear opening on one side in its natural state;

[0054] To clearly understand the technical solution, the steel barrel mold 100 is explained in detail. In this technical solution, the steel barrel mold 100 refers to a circular barrel-shaped structure in its natural state, but on one side, that is, an arc that is not closed. When it needs to be used as a mold, this open arc needs to be closed. When it is not needed, it will return to the open state by means of the metal's spring modulus, that is, metal memory. This return will automatically complete demolding by means of metal springback, so as to achieve processing more efficiently.

[0055] In this technical solution, the linear opening refers to the arc-shaped segment of the opening of the steel barrel mold 100 in its natural state. Since this opening is usually a straight line, it is defined as a linear opening. Therefore, it can be understood that the steel barrel mold 100 has two forms: one is a barrel shape with a non-complete circular cross-section, and the other is a barrel shape with a closed linear opening.

[0056] And, see the self-locking assembly arranged on the linear opening, please refer to Figure 1 The self-locking component includes:

[0057] The first support part 110 is a rigid protrusion fixedly disposed on one side of the linear opening;

[0058] The second support part 120 is a rigid protrusion fixedly disposed on the other side of the linear opening;

[0059] The first support part 110 and the second support part 120 are respectively provided with platforms parallel to the tangent at the linear opening relative to the steel barrel mold 100; the tangent at the linear opening can be understood as the tangent of the arc at the opening in the non-closed barrel shape, or it can be understood as the tangent at a point of the closing line when it is closed. Regardless of the type of tangent, it does not affect the implementation.

[0060] On the platforms of the first support portion 110 and the second support portion 120, self-locking linkages that cooperate with each other for automatic locking are provided. There are many ways to implement the self-locking linkage; for example, locking can be achieved by rotating a cylinder to lock the relative platforms. This embodiment provides an inventive concept for achieving automatic locking using a steel barrel mold 100.

[0061] In some embodiments, preferably, please refer to Figure 1 and Figure 2 The self-locking linkage includes:

[0062] The fourth support part 170 is fixedly connected to the first support part 110 or the steel barrel mold 100 on one side of the first support part 110, and protrudes from the rigid protrusion of the platform of the first support part 110; the function of the fourth support part 170 is to raise the position of the linear telescopic device 180 so that the connecting rod can be flipped.

[0063] The lever 150 is a C-shaped, L-shaped or L-shaped arc lever, with one end hinged to the first support part 110, and can be flipped toward the other side of the steel barrel mold 100;

[0064] The engaging portion 140 is a hinge axis that protrudes from the platform of the second support portion 120 and is parallel to the linear opening direction;

[0065] The rotating rod 160 is a C-shaped, L-shaped or L-shaped arc rod, one end of which is fixed to the engaging part 140 and can rotate toward the other side of the steel barrel mold 100;

[0066] The linear telescopic device 180 has its fixed end hinged to the fourth support part 170 and its telescopic end hinged to the swivel rod 160.

[0067] The linear telescopic device 180 drives the rotating rod 160 to rotate;

[0068] The end of the clamping rod 150 facing the other side of the steel barrel mold 100 is hinged between the hinge point of the linear telescopic device 180 and the rotating rod 160 and the engaging part 140.

[0069] When the rotating rod 160 rotates, it drives the locking rod 150 to rotate. The locking rod 150 bends and hangs on the engaging part 140, forming a clamping force to close the linear opening, and is locked by means of the locking rod 150 and the engaging part 140. In this embodiment, a technical solution is provided to achieve locking by using the locking rod 150 in cooperation with the engaging part 140 under the drive of the rotating rod 160.

[0070] In other embodiments, to optimize the adaptive capability of the locking component, please refer to [link to relevant documentation]. Figure 2 It also includes:

[0071] The third support part 130 is a rectangular metal cavity that is fixed inside the platform of the first support part 110;

[0072] The third support portion 130 is provided with a fastening spring 131 that is parallel to the tangent of the linear opening.

[0073] The third support portion 130 is provided with positioning channels 132 on both sides perpendicular to the linear opening direction;

[0074] The positioning channel 132 is a long strip-shaped hole that penetrates the side wall of the third support part 130, and its direction on the third support part 130 is parallel to the tangent at the linear opening.

[0075] The positioning channel 132 is provided with a movable part 133, the two ends of which are engaged in the positioning channel 132 and can translate and rotate within the positioning channel 132.

[0076] The lever 150 is fixed to the movable part 133 and is hinged relative to the first support part 110 by means of the movable part 133;

[0077] One end of the fastening spring 131 is fixed inside the third support portion 130, and the other end is fixed to the movable portion 133. When the rotating rod 160 drives the locking rod 150 to engage with the engaging portion 140, it provides a clamping force to pull the locking rod 150. In this embodiment, the cooperation between the fastening spring 131 and the movable portion 133 achieves the effect of prestress. With the help of the fastening spring 131 pulling the movable portion 133, the locking rod 150 is pulled to one side, and the traction force of the fastening spring 131 indirectly forms a clamping force, achieving a more secure locking.

[0078] In other embodiments, please refer to Figure 1 ,

[0079] When the steel barrel mold 100 is in the closed state, a closing part 190 is provided between the first support part 110 and the second support part 120;

[0080] The closing part 190 is a closing surface that is respectively provided on the first support part 110 and the second support part 120 and is mutually concave and convex. When the steel barrel mold 100 is closed, the closing part 190 is in contact.

[0081] The function of the closing portion 190 is to form a closed surface. In this embodiment, since the cement is fluid, it will overflow from the gaps after the model is positioned. To prevent overflow, the closing portion 190 is used to form one or more closed surfaces. For example, please refer to... Figure 1 The attached diagram shows two sections of convex-concave fit, and the overflowing cement grout from the first layer will flow inside and outside the cavity between the two sections of closure without affecting the locking component.

[0082] In other embodiments,

[0083] The closing part 190 is a protrusion fixed on the steel barrel mold 100 on both sides of the linear opening;

[0084] The closing portion 190 is provided with a surface that can fit with the first support portion 110 and the second support portion 120. When the first support portion 110 and the second support portion 120 approach each other with the help of the self-locking component to close the linear opening, the clamping force generated by the approach of the first support portion 110 and the second support portion 120 directly acts on the closing portion 190.

[0085] In this embodiment, the closing part 190 distributes the clamping force. In other embodiments, the clamping force acts directly on the contact surface of the first support part 110 and the second support part 120. In this embodiment, in order to improve the effect of the closing part 190, the clamping force generated by the first support part 110 and the second support part 120 acts on the closing part 190. In this embodiment, there is a gap between the closing part 190 and the first support part 110 and the second support part 120, and the locking is achieved by utilizing the elasticity of the metal.

[0086] In some embodiments, to improve the locking effect

[0087] The number of self-locking components provided on the linear opening is not less than four.

[0088] In other embodiments, to further increase the displacement of the steel barrel mold 100 during the closing process,

[0089] The opening and closing directions of adjacent sets of self-locking components are opposite. Although not shown in the accompanying drawings, synchronous movement on both sides can be achieved by using self-locking components with opposite directions of movement.

[0090] In other embodiments, preferably,

[0091] The linear telescopic device 180 is a cylinder.

[0092] In specific operation: The steel barrel mold 100 is initially in a naturally open state. In this state, the diameter of the steel barrel mold 100 is large, which facilitates the hoisting of the ductile iron pipe. With the help of a hoisting tool, the ductile iron pipe with welded flanges and stiffening plates on the outer wall is hoisted into the steel barrel mold 100 with the socket facing down. The self-locking linkage is activated to lock the steel barrel mold 100. In the preferred technical solution, the linear telescopic device 180 drives the rotating rod 160 to rotate. Under the action of the rotating rod 160, the locking rod 150 gradually flips towards the locking part 140. Since the locking rod 150 is not straight, there must be a curved part. This curved part overlaps on the locking part 140, forming a clamping force that hinders the opening of the steel barrel mold 100. At this point, multiple self-locking components lock in place, and cement material is poured between the ductile iron pipe and the steel drum mold 100. When the cement material hardens to the point where demolding is possible, the self-locking components open in the opposite direction. Under the action of the metal's rebound force, the inner wall of the steel drum mold 100 separates from the shaped cement surface, achieving demolding. Then, the ductile iron pipe is hoisted into the curing or maintenance station. Utilizing the characteristics of the semi-open drum mold, a linearly driven self-locking component is installed at the linear opening to achieve automatic shaping and demolding of the mold required for cement pouring on the outer wall of the ductile iron pipe jacking.

[0093] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mold for encasing ductile iron pipe in concrete, characterized in that, include: Steel barrel mold (100) is a barrel-shaped metal mold with a linear opening on one side in its natural state; And, a self-locking assembly disposed on the linear opening, the self-locking assembly comprising: The first support part (110) is a rigid protrusion fixedly disposed on one side of the linear opening; The second support (120) is a rigid protrusion fixedly disposed on the other side of the linear opening; The first support part (110) and the second support part (120) are respectively provided with platforms parallel to the tangent at the linear opening relative to the steel barrel mold (100); On the platforms of the first support (110) and the second support (120), there are self-locking linkages that cooperate with each other and can be automatically locked.

2. The mold for encasing ductile iron pipe in concrete as described in claim 1, characterized in that, The self-locking linkage includes: The fourth support part (170) is fixedly connected to the first support part (110) or the steel barrel mold (100) on one side of the first support part (110), and protrudes from the rigid protrusion of the platform of the first support part (110); The lever (150) is a C-shaped, L-shaped or L-shaped arc rod, with one end hinged to the first support part (110), and can be flipped toward the other side of the steel barrel mold (100); The engaging portion (140) is a hinge axis that protrudes from the platform of the second support portion (120) and is parallel to the linear opening direction; The rotating rod (160) is a C-shaped, L-shaped or L-shaped arc rod, with one end fixed to the engaging part (140), and can rotate toward the other side of the steel barrel mold (100); The linear telescopic device (180) has its fixed end hinged to the fourth support part (170) and its telescopic end hinged to the rotating rod (160). The linear telescopic device (180) drives the rotary rod (160) to rotate; The end of the clamping rod (150) facing the other side of the steel barrel mold (100) is hinged between the hinge point of the linear telescopic device (180) and the rotating rod (160) and the engaging part (140); When the rotating rod (160) rotates, it drives the locking rod (150) to rotate. The locking rod (150) bends and hangs on the locking part (140), forming a clamping force to close the linear opening, and is locked by means of the locking rod (150) and the locking part (140).

3. The mold for encasing ductile iron pipe in concrete as described in claim 2, characterized in that, Also includes: The third support part (130) is a rectangular metal cavity that is fixed inside the platform of the first support part (110); The third support part (130) is provided with a fastening spring (131) that is parallel to the tangent at the linear opening. The third support (130) is provided with positioning channels (132) on both sides perpendicular to the linear opening direction. The positioning channel (132) is a long strip-shaped hole that penetrates the side wall of the third support part (130), and its direction on the third support part (130) is parallel to the tangent at the linear opening; The positioning channel (132) is provided with a movable part (133), the two ends of the movable part (133) are engaged in the positioning channel (132), and can translate and rotate within the positioning channel (132); The lever (150) is fixed to the movable part (133) and hinged relative to the first support part (110) by means of the movable part (133); One end of the fastening spring (131) is fixed inside the third support part (130), and the other end is fixed on the movable part (133). When the rotating rod (160) drives the locking rod (150) to engage with the engaging part (140), it provides a clamping force to pull the locking rod (150).

4. The mold for encasing concrete around a ductile iron pipe jacking tube according to any one of claims 1-3, characterized in that, When the steel barrel mold (100) is in the closed state, a closing part (190) is provided between the first support part (110) and the second support part (120). The closing part (190) is a closed surface that is respectively provided on the first support part (110) and the second support part (120) and fits together with each other. When the steel barrel mold (100) is closed, the closing part (190) fits together.

5. The mold for encasing concrete around a ductile iron pipe jacking tube according to claim 4, characterized in that, The closing part (190) is a protrusion fixed on the steel barrel mold (100) on both sides of the linear opening; The closing part (190) is provided with a surface that can fit with the first support part (110) and the second support part (120). When the first support part (110) and the second support part (120) approach each other with the help of the self-locking component to close the linear opening, the clamping force generated by the approach of the first support part (110) and the second support part (120) directly acts on the closing part (190).

6. The mold for encasing concrete around a ductile iron pipe jacking pipe according to any one of claims 1-3, characterized in that, The number of self-locking components provided on the linear opening is not less than four.

7. The mold for encasing concrete around a ductile iron pipe jacking tube according to claim 6, characterized in that, The opening and closing directions of the two adjacent sets of self-locking components are opposite.

8. The mold for encasing concrete around a ductile iron pipe jacking tube according to any one of claims 2-3, characterized in that, The linear telescopic device (180) is a cylinder.

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