An opening sealing device for a concrete casting mold and a method of use

Abstract

The application relates to the technical field of concrete member prefabrication, and discloses an opening sealing device of a concrete casting mold and a use method, a sealing assembly comprises a sealing seat mechanism and a pressing mechanism, the sealing seat mechanism comprises an opening sealing seat, the pressing mechanism comprises a threaded pressing seat and a sliding clamping seat, the bottom of the opening sealing seat is provided with a plugging head, the opening sealing seat is connected to the opening of the mold through the plugging head, an inverted conical groove is formed in the inner side of the plugging head, the sliding clamping seat is movably connected to the inner side of the inverted conical groove, and the preset reinforcing steel bars are fixed to the inner side of the opening of the mold through the sliding clamping seat. The device is different from the original device, adopts a combined mounting structure, and cooperates with a contact extrusion mode to complete the mounting and fixing of the device itself and the preset reinforcing steel bars. When operating, only the sealing seat mechanism needs to be screwed, the mounting is more convenient and fast, the device does not need to be matched with specific mounting hole positions, can be used in cooperation with various molds, and has high use universality.

Description

Technical Field

[0001] This invention relates to the field of precast concrete components, specifically to an opening sealing device for a concrete casting mold and its usage method. Background Technology

[0002] In the field of wind power generation, many wind turbine towers are constructed using precast concrete components. During the construction process, the tower is mostly made up of multiple complete ring-shaped components stacked together. These ring-shaped components are typically assembled from two or more precast concrete components. When assembling two or more precast concrete components into a complete ring-shaped component, the ends of the precast concrete components need to have an overlapping structure. The fabrication of this structure requires openings in the molds used for casting the precast concrete components to install them. To ensure accurate installation of the reinforced concrete components and to seal the openings at the top of the molds, a sealing device for the concrete casting mold openings is required.

[0003] Patent No. CN104742227A discloses a sealing device for the opening of a concrete casting mold and its usage method. It uses a first driving mechanism and a second driving mechanism to drive the first sealing component and the second sealing component to move respectively, and the first sealing component and the second sealing component together seal the opening of the concrete casting mold. While sealing the opening of the concrete casting mold, it can also fix the pre-placed steel bars on the upper part of the mold. Its design is reasonable, its structure is simple, it can reduce sealing costs, and it is easy to demold, thereby improving work efficiency.

[0004] The opening sealing device of this concrete casting mold has the following drawbacks: The opening sealing device supports and fixes the reinforcing bars through a clamping structure composed of a first sealing component and a second sealing component. The sealing component is adjusted via bolts on the first and second driving mechanisms. Both fixing and disassembling the sealing component require tightening the bolts, and the adjustment of the two sealing components is independent. This necessitates repeated alternating tightening of the bolts on both sides, making it very inconvenient to use. Furthermore, due to the large number of pre-reinforced steel components on the wind turbine foundation, a significant amount of installation and disassembly time is required, affecting the overall construction speed. Moreover, the installation of this opening sealing device requires specific holes on the upper part of the mold to provide fixing points for the bolts, limiting its applicability and versatility. Summary of the Invention

[0005] The purpose of this invention is to provide an opening sealing device and method for using a concrete casting mold, in order to solve the problems mentioned in the background art. The original opening sealing device supports and fixes the reinforcing bars through a clamping structure composed of a first sealing component and a second sealing component, and adjusts the sealing component through bolt structures on the first and second driving mechanisms. When fixing and disassembling the sealing component, the bolt structure needs to be tightened. Moreover, the adjustment of the two sealing components is set independently, and the bolt structures on both sides need to be tightened repeatedly during the process, which is very inconvenient. In addition, since there are many pre-reinforced steel components on the wind turbine foundation, a lot of installation and disassembly time is required, which will affect the overall construction speed. Furthermore, the installation of this opening sealing device requires specific holes on the upper part of the mold to provide fixing points for the bolt structure, and it can only be used with specific casting molds, which greatly limits the applicability of the device and has low versatility.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an opening sealing device for a concrete casting mold, comprising a sealing assembly for connecting pre-placed reinforcing bars, wherein the sealing assembly comprises a sealing seat mechanism and a pressing mechanism, the pressing mechanism being disposed on the upper part of the sealing seat mechanism;

[0007] The sealing mechanism includes an open sealing seat, and the pressing mechanism includes a threaded pressure seat and a sliding clamp seat. The top of the open sealing seat is provided with a threaded connection seat, and the bottom of the open sealing seat is provided with a sealing head. The open sealing seat is connected to the opening of the mold through the sealing head. The inner side of the sealing head is provided with an inverted conical groove. The sliding clamp seat is movably connected to the inner side of the inverted conical groove. The threaded pressure seat contacts and presses against the top side of the sliding clamp seat. The pre-placed reinforcing bar is fixed to the inner side of the opening of the mold through the sliding clamp seat.

[0008] Preferably, the sealing head is made of rubber, the outer circumference of the sealing head is complete and without gaps, and an annular gasket is fixedly provided at the bottom of the opening seat. The sealing head and the annular gasket are an integral structure.

[0009] Preferably, the sealing head is made of plastic, and four second slots are symmetrically opened on the circumferential side of the sealing head. Four first slots are symmetrically opened on the circumferential side of the conical clamp, and an annular gasket is fixedly provided at the bottom of the opening seal.

[0010] Preferably, the bottom of the sliding clamp is provided with a conical clamp, which is adapted to the inverted conical slot, and the sliding clamp is fitted into the inner side of the inverted conical slot through the conical clamp.

[0011] Preferably, the threaded connector has a threaded hole at the top, with the upper part of the threaded hole being a threaded section and the lower part being a sliding section.

[0012] Preferably, the top of the sliding clamp is provided with a guide slip ring, which is adapted to the sliding hole section at the bottom of the threaded hole. The guide slip ring is slidably connected to the lower inner side of the threaded hole. A steel bar fixing hole is opened in the middle of the sliding clamp, and the pre-placed steel bar is inserted into the inner side of the steel bar fixing hole.

[0013] Preferably, the outer circumference of the guide ring is symmetrically provided with two positioning sliders, and the inner layer of the threaded hole is provided with a positioning groove that matches the positioning slider, and the positioning slider is slidably connected to the inner side of the positioning groove.

[0014] Preferably, the bottom of the threaded pressure seat is provided with a threaded cylinder, which is adapted to the threaded section of the threaded hole. The threaded cylinder is threadedly connected to the inside of the threaded hole, and the bottom of the threaded cylinder contacts and presses against the top of the guide slip ring.

[0015] Preferably, the top of the threaded pressure seat is fixed with a tightening seat, and the upper part of the tightening seat is evenly provided with four finger slots, and the top center of the tightening seat is provided with a rebar insertion hole.

[0016] The present invention also provides a method for using an opening sealing device for a concrete casting mold, comprising the following steps:

[0017] S1. Sealing installation: When installing the opening sealing seat, first clean the outside of the upper opening of the concrete casting mold to ensure that there are no large dust particles remaining on the plate surface of the upper opening of the concrete casting mold. Then, align the sealing head set at the bottom of the threaded pressure seat with the upper opening of the concrete casting mold and insert it. Ensure that the annular gasket at the bottom of the threaded connection seat is in tight contact with the top of the concrete casting mold to complete the sealing of the upper opening of the concrete casting mold and complete the installation of the opening sealing seat.

[0018] S2. Install the clamp. When installing the sliding clamp, insert the pre-placed steel bar into the inner layer of the steel bar fixing hole opened at the top of the sliding clamp. Then, place the pre-placed steel bar and the sliding clamp as a whole into the inner side of the threaded hole. When placing it in, ensure that the positioning slider at the top of the guide ring is aligned with the positioning groove in the threaded hole and engages in place. Slowly lower it so that the tapered clamp at the bottom of the sliding clamp contacts and engages with the inner wall of the inverted tapered groove in the sealing head, thus completing the installation of the sliding clamp.

[0019] S3. Tightening and fixing the reinforcing bars: When tightening and fixing the pre-placed reinforcing bars, the threaded pressure seat is sleeved on the top of the pre-placed reinforcing bar and the threaded cylinder at the bottom of the threaded pressure seat is connected to the inside of the threaded hole. Adjust the height of the pre-placed reinforcing bar, and then tighten the threaded pressure seat by tightening the top of the threaded pressure seat. The threaded cylinder slowly moves down and contacts and presses against the top of the guide slip ring. Under the pushing pressure of the threaded cylinder, the conical clamp contacts and presses against the inverted conical groove, causing the conical clamp to deform and contract inward to clamp and fix the pre-placed reinforcing bar. At the same time, the sealing head expands and deforms outward to contact and press against the inner wall of the mold opening, and snaps and fixes the opening sealing seat, completing the installation of the device. Similarly, simply turn the threaded pressure seat in the opposite direction to move the conical clamp back up and reset it, so that the pre-placed reinforcing bar and the mold lose the compressive force, completing the disassembly of the device.

[0020] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects:

[0021] This sealing device differs from the original device by adopting a modular installation structure and using contact compression to fix the device itself and the pre-placed reinforcing bars. The main structure of this device is divided into a sealing mechanism and a clamping mechanism. The sealing mechanism is used to close the opening of the concrete casting mold, and the clamping mechanism uses clamping force to fix the pre-placed reinforcing bars and the sealing mechanism. During installation, the threaded pressure seat is used as the structure for applying the compressing force. It works in conjunction with the sealing head at the bottom of the opening sealing seat and the conical clamp at the bottom of the sliding clamp. The contact compression between the conical clamp and the inverted conical groove causes the conical clamp to contract inward and the sealing head to expand outward, thereby locking and fixing the pre-placed reinforcing bars and the sealing mechanism respectively.

[0022] During operation, only the sealing mechanism needs to be turned, making installation more convenient and quick, saving a lot of construction time. Compared with the original device, this device has a simpler structure and lower cost. Furthermore, the fixing structure of this device only needs to match the opening on the mold, without the need for specific mounting holes, and can be used with various molds, making it highly versatile. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall installation structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall assembly structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the overall lower structure of the present invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the threaded pressure seat of the present invention;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the sliding clamp of the present invention;

[0029] Figure 6 This is a schematic diagram of the upper structure of the threaded connector with a plastic sealing head according to the present invention;

[0030] Figure 7 This is a schematic diagram of the lower structure of the threaded connector with a plastic sealing head according to the present invention;

[0031] Figure 8 This is a schematic diagram of the lower structure of the threaded connector with a rubber sealing head according to the present invention.

[0032] Explanation of reference numerals in the attached drawings: 1. Pre-placed reinforcing bar; 2. Sealing mechanism; 3. Clamping mechanism; 4. Threaded pressure seat; 5. Sliding clamp seat; 6. Open sealing seat; 7. Tightening seat; 8. Finger groove; 9. Reinforcing bar insertion hole; 10. Threaded cylinder; 11. Guide slip ring; 12. Conical clamp seat; 13. Reinforcing bar fixing hole; 14. First groove; 15. Positioning slider; 16. Threaded connection seat; 17. Sealing plug; 18. Threaded hole; 19. Positioning groove; 20. Annular gasket; 21. Second groove; 22. Inverted conical groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0035] Example 1

[0036] Please see Figure 1-7The present invention provides a technical solution: a sealing device for the opening of a concrete casting mold, comprising a sealing component for connecting a pre-placed reinforcing bar 1, wherein the pre-placed reinforcing bar 1 is a steel stud used for connecting and installing a wind turbine, the sealing component comprising a sealing seat mechanism 2 and a pressing mechanism 3, the pressing mechanism 3 being disposed on the upper part of the sealing seat mechanism 2, the sealing seat mechanism 2 being used to close the opening of the concrete casting mold, and the pressing mechanism 3 using pressing force to fix the pre-placed reinforcing bar 1 to the sealing seat mechanism 2, the main body of the device being made of composite plastic material.

[0037] The sealing mechanism 2 includes an open sealing seat 6, with a sealing head 17 at the bottom of the open sealing seat 6. The open sealing seat 6 is connected to the opening of the mold through the sealing head 17. The sealing head 17 is made of plastic. Four second slots 21 are symmetrically opened on the circumference of the sealing head 17. The second slots 21 can reduce the stress resistance of the sealing head 17 and facilitate its outward expansion when the sealing head 17 is under force. An inverted conical slot 22 is opened on the inner side of the sealing head 17. An annular gasket 20 is fixedly installed at the bottom of the open sealing seat 6. The annular gasket 20 is made of rubber and can increase the sealing performance of the open sealing seat 6 for the opening.

[0038] The top of the opening seal 6 is provided with a threaded connection seat 16, and the top of the threaded connection seat 16 is provided with a threaded hole 18. The upper part of the threaded hole 18 is a threaded section, and the lower part of the threaded hole 18 is a sliding hole section, which are used to connect the threaded cylinder 10 and the guide slip ring 11 respectively.

[0039] The clamping mechanism 3 includes a threaded pressure seat 4 and a sliding clamp seat 5. The sliding clamp seat 5 is movably connected to the inner side of the inverted conical slot 22. The threaded pressure seat 4 contacts and presses against the top side of the sliding clamp seat 5. The pre-placed steel bar 1 is fixed to the inner side of the mold opening through the sliding clamp seat 5. During the pressing, the conical clamp seat 12 at the bottom of the sliding clamp seat 5 is deformed and contracted inward under force, which can clamp and fix the pre-placed steel bar 1.

[0040] The bottom of the sliding clamp 5 is provided with a conical clamp 12, which is adapted to the inverted conical slot 22. The sliding clamp 5 is fitted and connected to the inner side of the inverted conical slot 22 through the conical clamp 12. The circumferential side of the conical clamp 12 is symmetrically provided with four first slots 14. The first slots 14 can reduce the stress resistance of the conical clamp 12 and facilitate its inward contraction when the conical clamp 12 is under force.

[0041] A guide slip ring 11 is provided on the top of the sliding clamp 5. The guide slip ring 11 is adapted to the sliding hole section at the bottom of the threaded hole 18. Two positioning sliders 15 are symmetrically arranged on the outer circumference of the guide slip ring 11. The inner layer of the threaded hole 18 is provided with a positioning groove 19 adapted to the positioning slider 15. The positioning slider 15 is slidably connected to the inner side of the positioning groove 19. Through the cooperation of the positioning slider 15 and the positioning groove 19, the installation angle of the sliding clamp 5 can be limited. After installation, the sealing head 17 can be better covered in the gap of the first groove 14, which can improve the sealing performance after the opening is closed. The guide slip ring 11 is slidably connected to the lower inner side of the threaded hole 18. A steel bar fixing hole 13 is opened in the middle of the sliding clamp 5. The pre-placed steel bar 1 is inserted into the inner side of the steel bar fixing hole 13.

[0042] The bottom of the threaded pressure seat 4 is provided with a threaded cylinder 10, which is adapted to the threaded section of the threaded hole 18. The threaded cylinder 10 is threadedly connected to the inner side of the threaded hole 18. The bottom of the threaded cylinder 10 contacts and presses against the top of the guide slip ring 11. The threaded pressure seat 4 is used as a structure for applying extrusion force. It works in conjunction with the sealing head 17 at the bottom of the opening sealing seat 6 and the conical clamp 12 at the bottom of the sliding clamp 5. By utilizing the contact extrusion between the conical clamp 12 and the inverted conical slot 22, the conical clamp 12 contracts inward and the sealing head 17 expands outward, thereby locking and fixing the pre-placed steel bar 1 and the sealing mechanism 2 respectively.

[0043] The top of the threaded pressure seat 4 is fixed with a tightening seat 7. The upper part of the tightening seat 7 is evenly provided with four finger slots 8. The finger slots 8 can be engaged with the user's fingers, which makes it easy for the user to rotate and tighten the tightening seat 7. A steel bar insertion hole 9 is provided at the center of the top of the tightening seat 7.

[0044] Working principle or structural principle: When using it, first install the opening seal 6. First, clean the outside of the upper opening of the concrete casting mold to ensure that there are no large dust particles left on the plate surface of the upper opening of the concrete casting mold. Then, align the sealing head 17 set at the bottom of the threaded pressure seat 4 with the upper opening of the concrete casting mold and insert it. Ensure that the annular gasket 20 at the bottom of the threaded connection seat 16 is in tight contact with the top of the concrete casting mold to complete the sealing of the upper opening of the concrete casting mold and complete the installation of the opening seal 6.

[0045] Next, the sliding clamp 5 is installed. The pre-placed steel bar 1 is inserted into the inner layer of the steel bar fixing hole 13 opened on the upper part of the sliding clamp 5. Then, the pre-placed steel bar 1 and the sliding clamp 5 are placed into the inner side of the threaded hole 18. When placing it in, it should be ensured that the positioning slider 15 on the upper part of the guide slip ring 11 and the positioning groove 19 in the threaded hole 18 are aligned and locked in place. Slowly lower it so that the conical clamp 12 at the bottom of the sliding clamp 5 contacts and engages with the inner wall of the inverted conical groove 22 in the sealing head 17, thus completing the installation of the sliding clamp 5.

[0046] Finally, the pre-placed reinforcing bar 1 is pressed and fixed. The threaded pressure seat 4 is sleeved on the top of the pre-placed reinforcing bar 1 and the threaded cylinder 10 at the bottom of the threaded pressure seat 4 is connected to the inside of the threaded hole 18. The height of the pre-placed reinforcing bar 1 is adjusted. Then, the threaded pressure seat 4 is turned by the tightening seat 7 at the top of the threaded pressure seat 4, so that the threaded cylinder 10 slowly moves down and contacts and presses against the top of the guide slip ring 11. Under the pushing of the threaded cylinder 10, the conical clamp 12 contacts and presses against the inverted conical slot 22, so that the conical clamp 12 deforms and contracts inward to clamp and fix the pre-placed reinforcing bar 1. At the same time, the sealing head 17 expands and deforms outward to contact and press against the inner wall of the mold opening, and clamps and fixes the opening sealing seat 6, thus completing the installation of the device. Similarly, the conical clamp 12 can be moved up and reset by simply turning the threaded pressure seat 4 in the opposite direction, so that the pre-placed reinforcing bar 1 and the mold lose the pressing force, thus completing the disassembly of the device.

[0047] Example 2

[0048] Please see Figure 8 Unlike Embodiment 1, the sealing head 17 is made of rubber. Both the sealing head 17 and the annular gasket 20 are made of hard composite rubber. The outer circumference of the sealing head 17 is complete and without gaps. The inner side of the sealing head 17 is provided with an inverted conical groove 22. The inner surface of the inverted conical groove 22 is treated with a smooth coating, which has a small coefficient of friction. The bottom of the opening sealing seat 6 is fixedly provided with an annular gasket 20. The sealing head 17 and the annular gasket 20 are an integral structure. The sealing head 17 is fixedly connected to the threaded connection seat 16 through the annular gasket 20.

[0049] The working principle or structural principle of Embodiment 2 is the same as that of Embodiment 1, except that the material and connection method of the sealing head 17 are different.

[0050] In summary, this sealing device differs from the original device by adopting a modular installation structure and using contact compression to fix the device itself and the pre-placed reinforcing bar 1. The main structure of this device is divided into a sealing seat mechanism 2 and a pressing mechanism 3. The sealing seat mechanism 2 is used to close the opening of the concrete casting mold, and the pressing mechanism 3 uses the pressing force to fix the pre-placed reinforcing bar 1 and the sealing seat mechanism 2. During installation, the threaded pressure seat 4 is used as the structure for applying the compressive force. It works in conjunction with the sealing head 17 at the bottom of the opening sealing seat 6 and the conical clamp 12 at the bottom of the sliding clamp 5. The contact compression between the conical clamp 12 and the inverted conical groove 22 causes the conical clamp 12 to contract inward and the sealing head 17 to expand outward, thereby locking and fixing the pre-placed reinforcing bar 1 and the sealing seat mechanism 2 respectively. During operation, only the sealing mechanism 2 needs to be turned, making installation more convenient and quick, saving a lot of construction time. Compared with the original device, this device has a simpler structure and lower cost. Furthermore, the fixing structure of this device only needs to match the opening on the mold, without the need for specific mounting holes, and can be used with various molds, making it highly versatile.

[0051] The present invention also provides a method for using a printing device for the surface of a packaging bag, comprising the following steps:

[0052] S1. Sealing installation: When installing the opening sealing seat 6, first clean the outside of the upper opening of the concrete casting mold to ensure that there are no large dust particles remaining on the plate surface of the upper opening of the concrete casting mold. Then, align the sealing head 17 set at the bottom of the threaded pressure seat 4 with the upper opening of the concrete casting mold and insert it to ensure that the annular gasket 20 at the bottom of the threaded connection seat 16 is in tight contact with the top of the concrete casting mold, thereby completing the sealing of the upper opening of the concrete casting mold and completing the installation of the opening sealing seat 6.

[0053] S2. Install the clamp. When installing the sliding clamp 5, insert the pre-placed steel bar 1 into the inner layer of the steel bar fixing hole 13 opened on the upper part of the sliding clamp 5. Then, place the pre-placed steel bar 1 and the sliding clamp 5 together into the inner side of the threaded hole 18. When placing it in, ensure that the positioning slider 15 on the upper part of the guide slip ring 11 and the positioning groove 19 in the threaded hole 18 are aligned and engaged. Slowly lower it so that the conical clamp 12 at the bottom of the sliding clamp 5 contacts and engages with the inner wall of the inverted conical groove 22 in the sealing head 17, thus completing the installation of the sliding clamp 5.

[0054] S3. Tighten and fix the reinforcing bar. When tightening and fixing the pre-placed reinforcing bar 1, the threaded pressure seat 4 is sleeved on the top of the pre-placed reinforcing bar 1 and the threaded cylinder 10 at the bottom of the threaded pressure seat 4 is connected to the inside of the threaded hole 18. Adjust the height of the pre-placed reinforcing bar 1. Then, the threaded pressure seat 4 is turned by the tightening seat 7 at the top of the threaded pressure seat 4, so that the threaded cylinder 10 slowly moves down and contacts and presses against the top of the guide slip ring 11. Under the pushing of the threaded cylinder 10, the conical clamp 12 contacts and presses against the inverted conical slot 22, so that the conical clamp 12 deforms and contracts inward to clamp and fix the pre-placed reinforcing bar 1. At the same time, the sealing head 17 expands and deforms outward to contact and press against the inner wall of the mold opening, and clamps and fixes the opening sealing seat 6, thus completing the installation of the device. Similarly, the conical clamp 12 can be moved up and reset by simply turning the threaded pressure seat 4 in the opposite direction, so that the pre-placed reinforcing bar 1 and the mold lose the pressing force, thus completing the disassembly of the device.

[0055] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the components described above are not limited to the various specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0056] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing device for the opening of a concrete casting mold, comprising a sealing assembly for connecting pre-placed reinforcing bars (1), characterized in that: The sealing assembly includes a sealing mechanism (2) and a pressing mechanism (3), wherein the pressing mechanism (3) is disposed on the upper part of the sealing mechanism (2); The sealing mechanism (2) includes an open sealing seat (6), and the pressing mechanism (3) includes a threaded pressure seat (4) and a sliding clamp seat (5). The top of the open sealing seat (6) is provided with a threaded connection seat (16), and the bottom of the open sealing seat (6) is provided with a sealing head (17). The open sealing seat (6) is connected to the opening of the mold through the sealing head (17). The inner side of the sealing head (17) is provided with an inverted conical slot (22). The sliding clamp seat (5) is movably connected to the inner side of the inverted conical slot (22). The threaded pressure seat (4) contacts and presses against the top side of the sliding clamp seat (5). The pre-placed steel bar (1) is fixed to the inner side of the mold opening through the sliding clamp seat (5). The bottom of the sliding clamp (5) is provided with a conical clamp (12), which is adapted to the inverted conical slot (22). The sliding clamp (5) is fitted and connected to the inside of the inverted conical slot (22) through the conical clamp (12).

2. The opening sealing device for a concrete casting mold according to claim 1, characterized in that: The sealing head (17) is made of rubber. The outer circumference of the sealing head (17) is complete and without gaps. An annular gasket (20) is fixedly provided at the bottom of the opening sealing seat (6). The sealing head (17) and the annular gasket (20) are an integral structure.

3. The opening sealing device for a concrete casting mold according to claim 1, characterized in that: The sealing head (17) is made of plastic. The circumferential side of the sealing head (17) is symmetrically provided with four second slots (21). The circumferential side of the conical clamp (12) is symmetrically provided with four first slots (14). The bottom of the opening sealing seat (6) is fixedly provided with an annular gasket (20).

4. The opening sealing device for a concrete casting mold according to claim 3, characterized in that: The threaded connector (16) has a threaded hole (18) at the top. The upper part of the threaded hole (18) is a threaded section, and the lower part of the threaded hole (18) is a sliding section.

5. The opening sealing device for a concrete casting mold according to claim 4, characterized in that: The top of the sliding clamp (5) is provided with a guide slip ring (11), which is adapted to the sliding hole section at the bottom of the threaded hole (18). The guide slip ring (11) is slidably connected to the lower inner side of the threaded hole (18). The middle part of the sliding clamp (5) is provided with a steel bar fixing hole (13), and the pre-placed steel bar (1) is inserted into the inner side of the steel bar fixing hole (13).

6. The opening sealing device for a concrete casting mold according to claim 5, characterized in that: The outer circumference of the guide slip ring (11) is symmetrically provided with two positioning sliders (15), and the inner layer of the threaded hole (18) is provided with a positioning groove (19) that is adapted to the positioning slider (15). The positioning slider (15) is slidably connected to the inner side of the positioning groove (19).

7. The opening sealing device for a concrete casting mold according to claim 6, characterized in that: The bottom of the threaded pressure seat (4) is provided with a threaded cylinder (10), which is adapted to the threaded section of the threaded hole (18). The threaded cylinder (10) is threadedly connected to the inner side of the threaded hole (18), and the bottom of the threaded cylinder (10) is pressed against the top of the guide slip ring (11).

8. The opening sealing device for a concrete casting mold according to claim 7, characterized in that: The top of the threaded pressure seat (4) is fixed with a tightening seat (7), and the upper part of the tightening seat (7) is evenly provided with four finger slots (8), and the center of the top of the tightening seat (7) is provided with a steel bar insertion hole (9).

9. The method of using the opening sealing device of a concrete casting mold according to claim 8, characterized in that, Includes the following steps: S1. Sealing installation: When installing the opening sealing seat (6), first clean the outside of the upper opening of the concrete casting mold to ensure that there are no large dust particles left on the plate surface of the upper opening of the concrete casting mold. Then, align the sealing head (17) set at the bottom of the threaded pressure seat (4) with the upper opening of the concrete casting mold and insert it to ensure that the annular gasket (20) at the bottom of the threaded connection seat (16) is in tight contact with the top of the concrete casting mold, and complete the sealing of the upper opening of the concrete casting mold, thus completing the installation of the opening sealing seat (6). S2. Install the clamp. When installing the sliding clamp (5), insert the pre-placed steel bar (1) into the inner layer of the steel bar fixing hole (13) opened on the upper part of the sliding clamp (5). Then, put the pre-placed steel bar (1) and the sliding clamp (5) into the inner side of the threaded hole (18). When putting it in, make sure that the positioning slider (15) on the upper part of the guide ring (11) and the positioning groove (19) in the threaded hole (18) are aligned and locked in place. Slowly lower it so that the conical clamp (12) at the bottom of the sliding clamp (5) contacts and fits into the inner wall of the inverted conical groove (22) in the sealing head (17) to complete the installation of the sliding clamp (5). S3. Tighten and fix the reinforcing bar. When tightening and fixing the pre-placed reinforcing bar (1), put the threaded pressure seat (4) on the top of the pre-placed reinforcing bar (1) and connect the threaded cylinder (10) at the bottom of the threaded pressure seat (4) to the inside of the threaded hole (18). Adjust the height of the pre-placed reinforcing bar (1). Then, turn the threaded pressure seat (4) by tightening the screw seat (7) at the top of the threaded pressure seat (4) so ​​that the threaded cylinder (10) slowly moves down and contacts and presses against the top of the guide slip ring (11). Under the pressure of the threaded cylinder (10) The lower conical clamp (12) contacts and squeezes the inverted conical slot (22), causing the conical clamp (12) to deform and shrink inward to clamp and fix the pre-placed steel bar (1). At the same time, the sealing head (17) expands and deforms outward to contact and squeeze the inner wall of the mold opening, and clamps and fixes the opening sealing seat (6), thus completing the installation of the device. Similarly, by simply turning the threaded pressure seat (4) in the opposite direction, the conical clamp (12) can be moved upward and reset, so that the pre-placed steel bar (1) and the mold lose the squeezing force, thus completing the disassembly operation of the device.

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