Pipe jacking pouring mold, top cover and method for using pipe jacking pouring mold and top cover

Abstract

The invention relates to the field of pipe jacking pouring, and discloses a pipe jacking pouring mold, a top cover and a method for using the pipe jacking pouring mold and the top cover. The pipe jacking pouring mold comprises a mold body (1) and a plurality of discharging channels (2) communicating with the mold body (1), and the mold body (1) and a workpiece are coaxially arranged; the discharging channel (2) comprises an opening and a material guide plate connected with the die body (1), the opening abuts against the outer side of a flange piece of the workpiece, the opening and the flange piece jointly form a concrete inlet, and the connecting position of the upper end of the material guide plate and the die body (1) is not lower than the lower end face of the flange piece. And the concrete flows into the space between the mold body (1) and the workpiece along the material guide plate. The discharging channel of the pipe jacking pouring mold can be used for pouring concrete, and the flange piece does not need to be holed.

Description

Technical Field

[0001] The invention relates to the field of pipe jacking casting, in particular to a pipe jacking casting mould and a top cover and a method for using the pipe jacking casting mould and the top cover. Background Art

[0002] Pipe jacking refers to pouring concrete into the pipe jacking. Usually, a one-piece mold is used for pouring. The flange is provided with pouring holes. The size of the pouring holes varies according to the pipe type. Since the flange surface of the pipe jacking is the main stress-bearing part, the pouring hole is generally required to be no larger than 60mm*100mm.

[0003] During pouring, concrete enters between the mold and the workpiece through these pouring holes. However, due to the large amount of concrete poured and the small pouring holes, the concrete feeding speed is slow and the pouring time is long during the actual pouring process. At the same time, for the jacking pipe produced using this pouring method, the pouring holes set on the flange surface will affect the overall strength of the flange. When the jacking flange fails, the failure position is located near the pouring holes.

[0004] Therefore, when this method of setting the pouring holes on the flange is adopted, the top pipe pouring not only takes a long time to pour, but also limits the strength of the flange, affecting the core quality of the product. Summary of the invention

[0005] In order to overcome the problem in the prior art that a method of setting a feed opening on a flange is used to implement jacking pipe casting, which not only takes a long time to cast, but also limits the strength of the flange hole and affects product quality, the present invention provides a jacking pipe casting mold and a top cover and a method for using the jacking pipe casting mold and the top cover. The feed opening of the jacking pipe casting mold can be used for casting concrete, and there is no need to drill holes in the flange.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a top pipe casting mold, which includes a mold body and a plurality of material discharge channels connected to the mold body, the mold body is placed coaxially with the workpiece, the material discharge channel includes an opening and a material guide plate connected to the mold body, the opening is against the outer side of the flange of the workpiece and forms an inlet for concrete together with the flange, the upper end of the material guide plate is connected to the mold body at a position not lower than the lower end surface of the flange, and the concrete flows along the material guide plate between the mold body and the workpiece.

[0007] Preferably, the material discharge channel comprises a diversion bin arranged at the lower part and a storage bin located at the upper part, and a slope for diverting concrete is arranged in the diversion bin.

[0008] The present invention also provides a top cover arranged on the top pipe casting mold, the top cover comprises a top cover body and a feed hole arranged on the edge of the top cover body, the top cover body covers the upper end of the top pipe casting mold, and the feed hole corresponds one-to-one with the feed channel.

[0009] Preferably, a limiting plate is provided on a side of the feed hole close to the flange, and the limiting plate is sleeved on the outer side of the mold body.

[0010] Preferably, the material discharge hole further includes a material discharge side plate, and the material discharge side plate and the limiting plate enclose the material discharge hole.

[0011] Preferably, a panel is provided on the outer edge of the top cover, the lower part of the panel is connected to the outer edge of the discharge hole, the panel is inclined, and the radius of the panel increases gradually from bottom to top;

[0012] The top cover body is tilted at the position of the discharge hole to facilitate the material to enter the discharge hole.

[0013] Preferably, the material discharge hole is located above the material discharge channel, and a gap is provided between the material discharge hole and the material discharge channel.

[0014] The present invention also provides a method of use, wherein the method of use uses the jacking pipe casting mold and the top cover, and the method of use comprises:

[0015] Step 1: sleeve the jacking pipe casting mold outside the workpiece, and cover the top cover on the jacking pipe casting mold;

[0016] Step 2: align the concrete pouring pipe with the feed hole and inject concrete into the feed hole;

[0017] Step 3: When the concrete overflows from the upper part of the discharge channel, the pouring is stopped.

[0018] Preferably, a vibration base is provided on the jacking pipe casting mold. In step 2, the jacking pipe casting mold is vibrated by the vibration base so that concrete can be filled into all spaces between the jacking pipe casting mold and the workpiece.

[0019] Preferably, there is a gap between the farthest point of the feeding hole and the farthest point of the feeding channel, and in step 2, it is possible to observe through the gap whether the liquid level of the concrete reaches the position of the feeding channel;

[0020] If the liquid level of the concrete has reached the storage bin, the pouring speed of the concrete needs to be slowed down. Summary of the invention

[0022] According to the above technical solution, the mold body is sleeved outside the workpiece and placed coaxially with the workpiece, the flange is located above the workpiece and sleeved in the mold body, and a cavity for pouring concrete is formed between the mold body and the workpiece. After the concrete enters the cavity, it will be filled between the mold body and the workpiece, and the height of the concrete is limited by the height of the flange. After the pouring is completed, the concrete, the workpiece and the flange are solidified into a whole. The top pipe casting mold of the present invention allows the concrete to enter the cavity through the feed channel, which can avoid opening a hole on the flange for pouring, and can effectively improve the strength of the flange. In addition, since there is no need to open a hole in the flange, the feed channel can be set to a larger size as needed, which can also effectively improve the efficiency of concrete pouring.

[0023] Providing multiple material discharge channels can realize pouring between the mold body and the workpiece through multiple material discharge channels at the same time, which not only improves the efficiency of pouring, but also is more conducive to the effective flow of concrete in the cavity, so that all spaces in the cavity can be filled with concrete.

[0024] In order to ensure that the height of the concrete can be connected with the flange surface after pouring and avoid the situation where the concrete pouring height is insufficient, the height of the material guide plate needs to be set to be no lower than the height of the bottom surface of the flange, so that there is sufficient height of concrete to achieve a fixed connection with the flange during pouring.

[0025] Preferably, the connection between the material guide plate and the mold body needs to be lower than the upper end surface of the flange to prevent excess concrete from contaminating the end surface of the flange when excessive concrete is poured. When the height of the connection between the material guide plate and the mold body is lower than the upper end surface of the flange, excess concrete will overflow over the material guide plate, so that the height of the poured concrete will not be higher than the height of the flange.

[0026] Preferably, a detachable baffle is provided at the opening position of the material discharge channel so as to effectively control the shape of the concrete layer at the opening position of the material discharge channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of a pipe jacking casting mold;

[0028] Figure 2 yes Figure 1 A top view of

[0029] Figure 3 This is a front view of another type of pipe jacking casting mold;

[0030] Figure 4 yes Figure 3 A top view of

[0031] Figure 5 It is a schematic diagram of the structure of a top cover;

[0032] Figure 6 It is a schematic diagram of the state of cooperation between the top pipe casting mold and the top cover.

[0033] Description of Reference Numerals

[0034] 1 mold body 21 guide chamber

[0035] 31 top cover body 32 feeding hole

[0036] 33 limit plate 34 blanking side plate

[0037] 35 enclosure 22 vibration base

[0038] 2 unloading channel 23 storage bin

[0039] 24 Slope DETAILED DESCRIPTION

[0040] In the present invention, unless otherwise specified, the directional words used, such as "coaxial, outside, below, between, lower part, upper part, edge, upper end, close to, outside" generally refer to the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0041] See also Figure 1-4 The described jacking pipe casting mold includes a mold body 1 and multiple material discharge channels 2 connected to the mold body 1. The mold body 1 is placed coaxially with the workpiece. The material discharge channel 2 includes an opening and a material guide plate connected to the mold body 1. The opening is against the outer side of the flange and forms an inlet for concrete together with the flange. The upper end of the material guide plate is connected to the mold body 1 at a level not lower than the lower end surface of the flange. Concrete flows along the material guide plate between the mold body 1 and the workpiece.

[0042] Through the implementation of the above technical solution, the mold body 1 is sleeved outside the workpiece and placed coaxially with the workpiece, the flange is located above the workpiece and sleeved inside the mold body 1, and a cavity for pouring concrete is formed between the mold body 1 and the workpiece. After the concrete enters the cavity, it will be filled between the mold body 1 and the workpiece, and the height of the concrete is limited by the height of the flange. After the pouring is completed, the concrete, the workpiece and the flange are solidified into a whole. The use of the top pipe casting mold of the present invention allows the concrete to enter the cavity through the feed channel 2, which can avoid opening a hole on the flange for pouring, and can effectively improve the strength of the flange. In addition, since there is no need to open a hole in the flange, the feed channel 2 can be set to a larger size as needed, which can also effectively improve the efficiency of concrete pouring.

[0043] Arranging multiple material discharge channels 2 can realize pouring between the mold body 1 and the workpiece through multiple material discharge channels 2 at the same time, which can not only improve the efficiency of pouring, but also be more conducive to the effective flow of concrete in the cavity, so that all spaces in the cavity can be filled with concrete.

[0044] In order to ensure that the height of the concrete can be connected with the flange surface after pouring and avoid the situation where the concrete pouring height is insufficient, the height of the material guide plate needs to be set to be no lower than the height of the bottom surface of the flange, so that there is sufficient height of concrete to achieve a fixed connection with the flange during pouring.

[0045] Preferably, the connection between the material guide plate and the mold body 1 needs to be lower than the upper end surface of the flange to prevent excess concrete from contaminating the end surface of the flange when excessive concrete is poured. When the height of the connection between the material guide plate and the mold body 1 is lower than the upper end surface of the flange, excess concrete will overflow over the material guide plate, so that the height of the poured concrete will not be higher than the height of the flange.

[0046] Preferably, a detachable baffle is provided at the opening position of the material discharge channel 2 so as to effectively control the shape of the concrete layer at the opening position of the material discharge channel 2 .

[0047] In one embodiment, the shape of the baffle is set to be an arc surface consistent with the curvature of the surface of the mold body 1 at this position, and the baffle and the mold body 1 can cooperate to make the mold body 1 a complete cylindrical surface. When pouring begins, the baffle is not installed, and concrete can enter the cavity through the entrance formed by the opening and the flange for pouring. After the pouring is completed, the baffle is installed to a degree of cooperation with the mold body 1. On the one hand, it can block excess concrete from outside, so that the shape of the concrete after solidification is the required cylindrical surface. On the other hand, after the baffle is installed, it can also effectively prevent the concrete from sinking under the action of its own weight, ensuring the reliability of the connection between the concrete and the flange.

[0048] In this embodiment, preferably, the material discharge channel 2 includes a guide bin 21 arranged at the lower part and a storage bin 23 located at the upper part, and a slope 24 for guiding concrete is arranged in the guide bin 21 .

[0049] In order to improve the efficiency of concrete pouring, the discharge channel 2 includes a guide bin 21 arranged at the lower part and a storage bin 23 located at the upper part. When the speed at which concrete flows into the discharge channel 2 is greater than the speed at which concrete flows into the mold body 1, concrete will accumulate in the discharge channel 2. When having the same height, the volume of the storage bin 23 is larger than that of the guide bin 21, so it has a storage function for concrete.

[0050] A slope 24 is provided in the guide chamber 21, so that after the concrete falls on the slope 24, it can slide along the slope 24 for a distance, and enter the cavity between the mold body 1 and the workpiece after obtaining an initial downward velocity, which makes the concrete filling efficiency higher.

[0051] See also Figure 5 The top cover is arranged on the top pipe casting mold, and the top cover includes a top cover body 31 and a discharge hole 32 arranged on the edge of the top cover body 31. The top cover body 31 covers the upper end of the top pipe casting mold, and the discharge hole 32 corresponds to the discharge channel 2 one by one.

[0052] Through the implementation of the above technical solution, by setting the top cover on the top pipe casting mold, it is possible to protect the upper end surface of the top pipe casting mold and prevent concrete from contaminating the flange and the upper end of the workpiece.

[0053] like Figure 6 As shown, while protecting the workpiece, the top cover is also provided with discharge holes 32 corresponding to the discharge channel 2 one by one, and concrete can enter the discharge channel 2 through the discharge holes 32, that is, when pouring concrete, concrete can enter through the discharge holes 32, and the purpose of pouring the top pipe can still be achieved.

[0054] In this embodiment, preferably, a limiting plate 33 is provided on one side of the feed hole 32 close to the flange, and the limiting plate 33 is sleeved on the outer side of the mold body 1 .

[0055] A limiting plate 33 is provided on one side of the feed hole 32 close to the flange. The limiting plate 33 is sleeved on the outer side of the mold body 1 to determine the relative position of the top cover and the top pipe casting mold.

[0056] In this embodiment, preferably, the material discharge hole 32 further includes a material discharge side plate 34 , and the material discharge side plate 34 and the limiting plate 33 enclose the material discharge hole 32 .

[0057] like Figure 5 As shown, the discharge hole 32 is enclosed by the discharge side plate 34 and the limiting plate 33, which can achieve the limiting and diversion effects on the concrete poured through the discharge hole 32, thereby preventing the concrete from flowing into or splashing to the position that needs to be protected, and protecting the workpiece during the concrete pouring process.

[0058] like Figure 6 As shown, the upper end surface of the mold body 1 is sleeved on the lower part of the top cover, and the limit plate 33 abuts against the outer surface of the upper end of the mold body 1, so that the upper end surface of the mold body 1 is completely covered by the top cover body 31, thereby achieving effective protection of the flange and workpiece in the mold body 1.

[0059] In this embodiment, preferably, a panel 35 is provided at the outer edge of the top cover, the lower portion of the panel 35 is connected to the outer edge of the discharge hole 32, the panel 35 is inclined, and the radius of the panel 35 gradually increases from bottom to top;

[0060] The top cover body 31 is tilted at the position of the discharge hole 32 to facilitate the material to enter the discharge hole 32 .

[0061] The inclined enclosure 35 makes the upper end opening of the discharge hole 32 relatively large, which is convenient for filling concrete. Figure 5 As shown, the enclosure 35 and the top cover body 31 are inclined toward the upper end of the discharge hole 32. If concrete falls on the top cover, it can also be received by the top cover body 31 and the enclosure 35, thereby realizing reliable management of the concrete during the pouring process.

[0062] In this embodiment, preferably, the feeding hole 32 is located above the feeding channel 2 , and a gap is provided between the feeding hole 32 and the feeding channel 2 .

[0063] A gap is provided between the discharge hole 32 and the discharge channel 2, so that if excessive concrete flows in during the pouring process, it can still overflow over the discharge channel 2. Avoid the concrete pouring height being higher than the flange position.

[0064] A method of use, which uses a top pipe casting mold and a top cover, and the method of use comprises:

[0065] Step 1: Sleeve the top pipe casting mold outside the workpiece, and cover the top cover on the top pipe casting mold;

[0066] Step 2: Align the concrete pouring pipe with the feed hole 32 and inject concrete into the feed hole 32;

[0067] Step 3: When the concrete overflows from the upper part of the discharge channel 2, the pouring is stopped.

[0068] By implementing the above technical solution, after the top pipe casting mold is sleeved outside the workpiece and the top cover is placed on the top pipe casting mold, the top pipe can be cast. At this time, the feed hole 32 is aligned with the feed channel 2, and the upper end surface of the top pipe casting mold has been protected.

[0069] After the concrete is injected into the discharge hole 32, it falls into the discharge channel 2 below, and under the guiding effect of the slope 24, it flows into the cavity between the mold body 1 and the workpiece. The simultaneous operation of multiple discharge holes 32 can improve the efficiency of pouring, and at the same time, it can also avoid the concrete flowing too far, the resistance in the process and other factors that cause the concrete to be unable to effectively fill all the space in the cavity, resulting in voids in the concrete layer after solidification, affecting the structural strength of the jacking pipe.

[0070] As the pouring process continues, the amount of concrete in the cavity between the mold body and the workpiece gradually increases, and the liquid level of the concrete will continue to rise. When the liquid level of the concrete rises to the flange, it indicates that a sufficient amount of concrete has been poured. In fact, since the flange and the top pipe casting mold are already covered by the top cover, it is not convenient to observe. Therefore, the height of the upper edge of the discharge channel 2 is set to be the same as the height of the flange. Then, when the concrete is poured to the height of the flange, if the concrete continues to be poured, the excess concrete will overflow over the upper edge of the discharge channel 2.

[0071] Preferably, in order to ensure the reliability of the connection between the concrete and the flange, the height of the upper edge of the discharge channel 2 should be set to be slightly higher than the height of the flange, so that the concrete can fully fill the lower end surface of the flange, so that a reliable connection with the flange can be obtained after the concrete solidifies.

[0072] In this embodiment, preferably, a vibration base 22 is provided on the jacking pipe casting mold. In step 2, the jacking pipe casting mold is vibrated by installing a pneumatic vibrator on the vibration base 22, so that the concrete can fill all the spaces between the jacking pipe casting mold and the workpiece.

[0073] In the narrow space between the mold body 1 and the workpiece, concrete may have voids during the pouring process due to reasons such as the flow of concrete being blocked. In order to ensure that the concrete can fill all the spaces between the top pipe casting mold and the workpiece, during the pouring process, the concrete in the mold body 1 can be vibrated to have better downward fluidity. During the vibration process, the concrete overcomes the static friction with the surrounding materials, and at the same time, relying on its own gravity, the concrete will have a tendency to move downward. When there are gaps below some concrete, the concrete will fall into the gaps below under the action of gravity, making the concrete filling more effective and avoiding the appearance of voids in the concrete layer.

[0074] Preferably, during the pouring process, the mold body 1 is continuously vibrated, so that the concrete can be vibrated to be more compact, thereby increasing the structural strength of the concrete layer and improving the outer surface quality of the concrete layer.

[0075] In this embodiment, preferably, there is a gap between the farthest point of the feeding hole 32 and the farthest point of the feeding channel 2. In step 2, the gap can be used to observe whether the liquid level of the concrete reaches the position of the feeding channel 2.

[0076] If the liquid level of the concrete has reached the storage bin 23, the pouring speed of the concrete needs to be slowed down.

[0077] There is a gap between the farthest point of the discharge hole 32 and the farthest point of the discharge channel 2, and the gap can be used as an observation hole for the concrete. During the pouring process, the staff can observe the concrete in the discharge channel 2 through the gap. During normal pouring, the concrete can quickly enter the discharge channel 2 from the discharge hole 32, and enter the mold body 1 under the guidance of the slope 24. Therefore, there will be no stagnant concrete in the discharge channel 2, that is, the concrete in the discharge channel 2 is always in a flowing state. When the concrete pouring is nearing the end, the concrete in the mold body 1 is already high enough. The concrete that enters the mold body 1 from the discharge channel 2 cannot flow to a place farther away from the discharge channel 2 in time, which will cause the concrete to accumulate near the discharge channel 2, and finally cause the concrete to accumulate in the discharge channel 2. At this time, it is necessary to reduce the speed of concrete pouring so that the concrete entering the mold body 1 has enough flow time, so that the concrete can be evenly distributed in all spaces of the cavity.

[0078] Preferably, it is also necessary to observe the concrete in multiple discharge channels 2, determine the speed of concrete pouring according to the situation of retained concrete, and ensure that the concrete in the discharge channel 2 will not overflow from the storage bin 23, until the concrete pouring continues to the final stage, the concrete in the storage bin 23 has begun to overflow and no longer flows into the mold body 1, at which time the concrete pouring is completed.

[0079] Preferably, a baffle plate that matches the opening of the material discharge channel can be installed at the opening position, and the baffle plate closes the opening of the material discharge channel. The use of the baffle plate can make the appearance of the poured concrete layer consistent and more beautiful. On the other hand, after the use of the baffle plate, the volume and shape of the cavity between the mold body 1 and the workpiece and the flange are determined, so that the concrete located therein cannot sink and can only maintain the current shape until solidification, thereby ensuring the reliability of the connection between the flange and the concrete.

[0080] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0081] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0082] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A pipe jacking casting mold, characterized in that: The jacking pipe casting mold comprises a mold body (1) and a plurality of material discharge channels (2) connected to the mold body (1); the mold body (1) is placed coaxially with the workpiece; the material discharge channel (2) comprises an opening and a material guide plate connected to the mold body (1); the opening abuts against the outer side of a flange of the workpiece and forms an inlet for concrete together with the flange; the upper end of the material guide plate is connected to the mold body (1) at a position not lower than the lower end surface of the flange; the concrete flows along the material guide plate into between the mold body (1) and the workpiece.

2. The jacking pipe casting mold according to claim 1, characterized in that: The material discharge channel (2) comprises a diversion bin (21) arranged at the lower part and a storage bin (23) located at the upper part, and a slope (24) for diverting concrete is arranged in the diversion bin (21).

3. A top cover provided on the top pipe casting mold according to claim 2, characterized in that: The top cover comprises a top cover body (31) and a feed hole (32) arranged at the edge of the top cover body (31); the top cover body (31) covers the upper end of the top pipe casting mold; and the feed hole (32) corresponds one-to-one to the feed channel (2).

4. The top cover according to claim 3, characterized in that: A limiting plate (33) is provided on one side of the material discharge hole (32) close to the flange, and the limiting plate (33) is sleeved on the outer side of the mold body (1).

5. The top cover according to claim 4, characterized in that: The material discharge hole (32) further comprises a material discharge side plate (34), and the material discharge side plate (34) and the limiting plate (33) enclose the material discharge hole (32).

6. The top cover according to claim 5, characterized in that: The outer edge of the top cover is provided with a panel (35), the lower part of the panel (35) is connected to the outer edge of the discharge hole (32), the panel (35) is inclined, and the radius of the panel (35) gradually increases from bottom to top; The top cover body (31) is arranged obliquely at the position of the material discharge hole (32) to facilitate the material to enter the material discharge hole (32).

7. The top cover according to claim 6, characterized in that: The material discharge hole (32) is located above the material discharge channel (2), and a gap is provided between the material discharge hole (32) and the material discharge channel (2).

8. A method of use, characterized in that: The method of use uses the top pipe casting mold according to claim 2 and the top cover according to any one of claims 3 to 8, and the method of use includes: Step 1: sleeve the jacking pipe casting mold outside the workpiece, and cover the top cover on the jacking pipe casting mold; Step 2: align the concrete pouring pipe with the feed hole (32), and inject concrete into the feed hole (32); Step 3: When the concrete overflows from the upper part of the discharge channel (2), the pouring is stopped.

9. The method of use according to claim 8, characterized in that: The jacking pipe casting mold is provided with a vibration base (22). In step 2, the jacking pipe casting mold is vibrated by the vibration base (22) so that concrete can be filled into all spaces between the jacking pipe casting mold and the workpiece.

10. The method of use according to claim 8, characterized in that: There is a gap between the farthest point of the feeding hole (32) and the farthest point of the feeding channel (2), and in step 2, it is possible to observe through the gap whether the liquid level of the concrete reaches the position of the feeding channel (2); If the liquid level of the concrete has reached the storage bin (23), the pouring speed of the concrete needs to be slowed down.

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