Novel control mold for preventing prefabricated concrete U-shaped groove from deforming

Abstract

The invention belongs to the technical field of concrete forming, and particularly relates to a novel control mold for preventing prefabricated concrete U-shaped groove deformation, the novel control mold comprises a lower mold and an upper mold matched with the lower mold, a thermoplastic film sleeve is laid on the inner wall of the lower mold, and a heating cavity is formed in the lower mold; a heat conducting sheet with the outer wall extending into the heating cavity is fixedly embedded in the inner wall of the lower mold, a heat supply mechanism for heating the interior of the heating cavity is arranged on the lower mold, and the heat supply mechanism comprises a boiler for generating hot steam. The thermoplastic film sleeve is arranged between the U-shaped groove and the inner wall of the mold, adhesion between the U-shaped groove and the inner wall of the mold is isolated, the thermoplastic film sleeve is softened and deformed through heating, attachment between the thermoplastic film sleeve and the inner wall of the mold is automatically relieved, jacking of the U-shaped groove is more convenient, damage to the U-shaped groove caused by direct jacking during adhesion is avoided, and the service life of the U-shaped groove is prolonged. And water vapor of a heating source is recycled to heat the water body and inflate the air bag, so that energy is recycled, and energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of concrete molding, and in particular to a novel control mold for preventing deformation of a prefabricated concrete U-shaped groove. Background Art

[0002] Concrete U-shaped trough is a common engineering structure, widely used in water conservancy, road and bridge construction. The current concrete U-shaped trough is mainly energy-saving concrete U-shaped trough. The energy-saving concrete U-shaped trough is produced in a prefabricated manner, and the bottom is lined with plastic film, which greatly increases the ability to prevent water penetration and shows significant advantages in farmland water conservancy irrigation.

[0003] The prefabrication method of concrete U-shaped trough includes pouring the mixed concrete into the mold, vibrating and compacting it, then standing and curing it to the initial setting state, removing the mold after reaching a certain strength, and continuing natural or steam curing to enhance the hardness. The traditional U-shaped trough is mainly demolded by: water washing and immersion demolding, knocking demolding, but the water washing and immersion method requires transportation and is time-consuming, and the knocking demolding method is prone to damage to the U-shaped trough. Therefore, how to quickly demold without damage is a problem that needs to be solved urgently.

[0004] In order to solve the above problems, we proposed a new control mold to prevent the deformation of precast concrete U-shaped groove. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the background technology and to propose a new control mold for preventing the deformation of precast concrete U-shaped grooves.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a new control mold for preventing deformation of a precast concrete U-shaped groove, comprising a lower mold and an upper mold matched with the lower mold, the inner wall of the lower mold is paved with a thermoplastic film sleeve, a heating cavity is opened in the lower mold, the inner wall of the lower mold is fixedly embedded with a heat-conducting sheet whose outer wall extends into the heating cavity, a heating mechanism for heating the interior of the heating cavity is arranged on the lower mold, the heating mechanism comprises a boiler for generating hot steam, a recess is arranged on the inner bottom of the lower mold, an air bag is fixed in the recess, a liquid bag is fixed on the surface of the air bag, the liquid bag is filled with electrorheological fluid, a heating wire is arranged on the surface of the liquid bag, and an air supply mechanism connected to the air bag is arranged on the outer wall of the lower mold; When demolding after the U-shaped groove is formed, the heat conducting sheet is heated by hot steam, and the heating wire is energized for heating. Under the action of heat, the thermoplastic film sleeve softens and falls off. At the same time, the air supply mechanism supplies air to the airbag, causing the airbag to expand and lift the formed U-shaped groove upward.

[0007] In the above-mentioned novel control mold for preventing deformation of precast concrete U-shaped grooves, an outer wall of the lower mold is provided with an installation opening connected to the heating chamber, and the boiler is installed in the installation opening.

[0008] In the above-mentioned new control mold for preventing deformation of precast concrete U-shaped grooves, the air supply mechanism includes a support plate and a guide plate fixed to the outer wall of the lower mold, a piston tube is fixed at the end of the support plate, a piston is slidably arranged in the piston tube, a piston column is fixed to the outer wall of the piston, a push plate is fixed to the end of the piston column, an air supply pipe is connected between the outer wall of the piston tube and the airbag, a one-way air inlet valve is arranged on the outer wall of the piston tube, a one-way air outlet valve is arranged on the outer wall of the air supply pipe, and a reciprocating mechanism for pushing the push plate to reciprocate and inflate the airbag is also arranged on the outer wall of the lower mold.

[0009] In the above-mentioned new control mold for preventing deformation of precast concrete U-shaped grooves, the reciprocating mechanism includes a connecting cylinder fixed on the outer wall of the lower mold, a horizontally arranged rotating shaft is installed on the connecting cylinder, and a support plate is also connected between the lower mold and the rotating shaft, a fan blade located in the connecting cylinder is fixed on the outer wall of the rotating shaft, a steam pipe with one end inserted into the heating chamber is fixed on the connecting cylinder, and the other end of the steam pipe is arranged toward the fan blade, a connecting plate is fixed at the end of the rotating shaft, a pushing column is fixed on the outer wall of the connecting plate, a reciprocating column is slidably inserted on the guide plate, one end of the reciprocating column is fixedly connected to the outer wall of the pushing plate, and the other end of the reciprocating column is fixedly provided with a slot with a notch on the upper side wall, and the outer wall of the reciprocating column is sleeved with a telescopic spring, and the two ends of the telescopic spring are respectively fixedly connected to the guide plate and the outer wall of the reciprocating column.

[0010] In the above-mentioned new control mold for preventing deformation of precast concrete U-shaped grooves, the outer wall of the lower mold is fixed with a magnet ring sleeved on the outer wall of the rotating shaft, and the outer wall of the rotating shaft is fixed with a coil located in the magnet ring and moving to cut magnetic flux lines.

[0011] In the above-mentioned new control mold for preventing deformation of precast concrete U-shaped grooves, a water tank is fixed to the outer wall of the lower mold through a top support plate, and a drainage pipe with an end extending into the connecting tube is connected to the lower side wall of the water tank, and a water supply pipe is connected between the outer wall of the connecting tube and the boiler, and the end of the drainage pipe is arranged toward the fan blades, and a vertically arranged heat-conducting pipe is fixedly inserted into the upper side wall of the connecting tube, and the lower end of the heat-conducting pipe contacts the inner wall of the connecting tube, and an opening is opened on the outer wall of the heat-conducting pipe, and the upper end of the heat-conducting pipe extends into the water tank, and the middle part of the heat-conducting pipe is provided with multiple sections and continuous bends.

[0012] Compared with the existing technology, the advantages of the new control mold for preventing deformation of precast concrete U-shaped grooves are: 1. A boiler, a heat conducting sheet and a thermoplastic film sleeve are provided. The thermoplastic film sleeve separates the U-shaped groove from the inner wall of the lower mold to prevent the U-shaped groove from sticking to the inner wall of the lower mold. When the U-shaped groove is shaped and demolded, the heat conducting sheet is heated by the steam generated by the boiler. The heat conducting sheet transfers the heat in the steam to the thermoplastic film sleeve to heat the thermoplastic film sleeve, soften and deform it, and separate from the lower mold, thereby facilitating the demolding of the U-shaped groove; 2. Set up a liquid bag and an air bag. The liquid bag is filled with electrorheological fluid, which can be electrified and solidified to support the U-shaped groove. When the U-shaped groove is demolded, the electrorheological fluid is transformed into a liquid state. When it contacts the U-shaped groove, the electrorheological fluid is squeezed and the gas in the air bag flows, automatically balancing the pressure to ensure that the pressure at each position is equal and the stress is balanced; 3. An air supply mechanism and a reciprocating mechanism are set up. Through the water vapor injection and the contact between the water flow and the fan blades, the fan blades are driven to rotate, so that the push column drives the piston to move left and right, and the external air is pushed into the air bag to make the air bag bulge, and the U-shaped groove is pushed up to loosen the U-shaped groove, which is convenient for subsequent lifting or lifting. At the same time, the excess water vapor can heat the water in the water tank and the connecting tube, reducing the energy consumption of the subsequent boiler for heating the water; In summary, the present invention sets a thermoplastic film sleeve between the U-shaped groove and the inner wall of the mold to isolate the adhesion between the U-shaped groove and the inner wall of the mold, and softens and deforms the thermoplastic film sleeve by heating to automatically release the adhesion with the inner wall of the mold, making it more convenient to lift the U-shaped groove, avoiding damage to the U-shaped groove caused by direct lifting during adhesion, and recovering the water vapor from the heating source to heat the water body and inflate the airbag, thereby recovering energy and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the external structure of a new control mold for preventing deformation of a precast concrete U-shaped groove proposed by the present invention; Figure 2 This is a schematic diagram of the structure of the middle and lower molds and the thermoplastic film sleeve of a new control mold for preventing the deformation of the precast concrete U-shaped groove proposed by the present invention; Figure 3 This is a schematic structural diagram of a new type of control mold for preventing deformation of a precast concrete U-shaped groove proposed by the present invention; Figure 4 A schematic diagram of the longitudinal section structure of the lower mold in a new control mold for preventing deformation of a precast concrete U-shaped groove proposed by the present invention; Figure 5 This is a schematic diagram of the structure of the connection between the connecting cylinder and the rotating shaft in a new control mold for preventing deformation of a precast concrete U-shaped groove proposed by the present invention; Figure 6This is a schematic structural diagram of the connection between the reciprocating mechanism and the air supply mechanism in a new control mold for preventing deformation of a precast concrete U-shaped groove proposed by the present invention; Figure 7 The present invention provides a schematic diagram of the internal structure of a connecting tube in a new control mold for preventing deformation of a precast concrete U-shaped groove.

[0014] In the figure: 1 lower mold, 2 thermoplastic film sleeve, 3 upper mold, 4 top support plate, 5 water tank, 6 heat pipe, 7 drainage pipe, 8 connecting tube, 9 water supply pipe, 10 boiler, 11 fan blade, 12 support plate, 13 rotating shaft, 14 steam pipe, 15 bend, 16 coil, 17 magnet ring, 18 heating chamber, 19 heat conductive sheet, 20 air bag, 21 liquid bag, 22 push plate, 23 guide plate, 24 reciprocating column, 25 slot, 26 push column, 27 telescopic spring, 28 one-way air inlet valve, 29 air supply pipe, 30 one-way air outlet valve, 31 installation port, 32 connecting plate, 33 piston tube. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] Reference Figure 1-Figure 7 A new control mold for preventing deformation of a precast concrete U-shaped groove comprises a lower mold 1 and an upper mold 3 matched with the lower mold 1, the inner wall of the lower mold 1 is paved with a thermoplastic film sleeve 2, a heating chamber 18 is provided in the lower mold 1, a heat conducting sheet 19 extending from the outer wall to the heating chamber 18 is fixedly embedded in the inner wall of the lower mold 1, a heating mechanism for heating the interior of the heating chamber 18 is provided on the lower mold 1, the heating mechanism comprises a boiler 10 for generating hot steam, an installation port 31 communicating with the heating chamber 18 is provided on the outer wall of the lower mold 1, and the boiler 1 0 is installed in the installation opening 31, a notch is provided at the inner bottom of the lower mold 1, an air bag 20 is fixed in the notch, a liquid bag 21 is fixed on the surface of the air bag 20, the liquid bag 21 is filled with electrorheological fluid, a heating wire is provided on the surface of the liquid bag 21, and an air supply mechanism connected to the air bag 20 is provided on the outer wall of the lower mold 1. Before pouring the concrete U-shaped groove into the lower mold 1, the thermoplastic film sleeve 2 is first placed in the lower mold 1, and then the mixed concrete is poured into the thermoplastic film sleeve 2, followed by vibrating and compacting, and then compacting and shaping; The heat conducting sheet 19 is usually made of a material with good thermal conductivity (such as aluminum, copper, graphite, etc.), and transfers heat through heat conduction. It can be used to guide the heat generated by the heat source from the high temperature area to the low temperature area. When the U-shaped groove is demoulded later, the boiler 10 is started to generate high temperature steam to enter the heating chamber 18, and the heat in the high temperature steam is transferred to the thermoplastic film sleeve 2 through the heat conducting sheet 19. The thermoplastic film sleeve 2 can play a role in heat preservation and moisture retention in the early stage of concrete U-shaped groove forming, and can accelerate the hydration process of concrete. When the U-shaped groove is demoulded in the later stage of forming, the thermoplastic film sleeve 2 will soften and deform under the high temperature transferred by the heat conducting sheet 19, and break away from the bonding with the inner wall of the lower mold 1. The formed U-shaped groove can be directly lifted or hoisted later, which solves the problem that the traditional U-shaped groove is not easy to be disconnected and demoulded from the inner wall of the lower mold 1, and realizes fast and damage-free U-shaped groove demoulding; Furthermore, a condensed water collection tank is provided at the bottom of the heating chamber 18, and the condensed water can be pumped out for reuse later.

[0017] Furthermore, a heating wire is provided on the surface of the liquid capsule 21 , and the heating wire is energized to generate heat to heat the bottom of the thermoplastic film sleeve 2 to soften and deform it.

[0018] Furthermore, the thermoplastic film sleeve 2 may be made of a PLA film. The PLA material has the characteristics of a low melting point (about 100° C.) but high strength, can be easily softened and deformed, and can ensure a supporting effect during the U-groove forming process.

[0019] Furthermore, the electrorheological fluid is a suspension system formed by dispersing solid particles with a high dielectric constant in a liquid matrix with a low dielectric constant. Under the action of an electric field, its rheological properties will undergo a significant reversible change, thereby realizing a transition from liquid to solid. In the initial stage of forming the U-shaped groove, the airbag 20 is in a contracted state, and the electrorheological fluid in the liquid bag 21 is energized and converted into a solid state to fill the recess, thereby providing preliminary support for the concrete. After the U-shaped groove is finalized, the electrorheological fluid is powered off to convert the solid state into a liquid state. At this time, the airbag 20 and the liquid bag 21 are in a flexible form, so they can both be adaptively deformed. When the airbag 20 expands, it pushes the liquid bag 21 to move upward. When the liquid bag 21 contacts the U-shaped groove, it will adapt to the shape of the U-shaped groove. At the same time, the liquid bag 21 has the ability to contract and deform, and will automatically balance the pressure when in contact with the U-shaped groove to ensure that the pressure at each position is equal.

[0020] Furthermore, the main function of the airbag 20 is to push the formed U-shaped groove to loosen it so that the U-shaped groove can be demolded later by means of a ejector pin or hoisting. In order to better inflate the airbag 20, the airbag 20 can also be connected to an external air pump or other air supply equipment.

[0021] To further explain, there is high-temperature steam in the heating chamber 18 , and under the action of the high temperature, the air in the airbag 20 will expand to a certain extent, thereby increasing the thrust of the airbag 20 .

[0022] The air supply mechanism includes a support plate and a guide plate 23 fixed to the outer wall of the lower mold 1, a piston tube 33 is fixed at the end of the support plate, a piston is slidably arranged in the piston tube 33, a piston column is fixed to the outer wall of the piston, a push plate 22 is fixed to the end of the piston column, an air supply pipe 29 is connected between the outer wall of the piston tube 33 and the air bag 20, a one-way air inlet valve 28 is arranged on the outer wall of the piston tube 33, and a one-way air outlet valve 30 is arranged on the outer wall of the air supply pipe 29, the one-way air inlet valve 28 is used to suck external air into the piston tube 33 without exhausting it, and the one-way air outlet valve 30 is used to squeeze the air sleeve air supply pipe 29 in the piston tube 33 into the air bag 20 without sucking out the air in the air bag 20; The outer wall of the lower mold 1 is also provided with a reciprocating mechanism for pushing the push plate 22 to reciprocate and inflate the airbag 20. The reciprocating mechanism includes a connecting tube 8 fixed on the outer wall of the lower mold 1, and a horizontally arranged rotating shaft 13 is installed on the connecting tube 8. A supporting disk 12 is also connected between the lower mold 1 and the rotating shaft 13. A fan blade 11 located in the connecting tube 8 is fixed on the outer wall of the rotating shaft 13. A steam pipe 14 with one end inserted into the heating chamber 18 is fixed on the connecting tube 8, and the other end of the steam pipe 14 is arranged toward the fan blade 11. A connecting plate 32 is fixed to the end of the rotating shaft 13, a pushing column 26 is fixed to the outer wall of the connecting plate 32, a reciprocating column 24 is slidably inserted on the guide plate 23, one end of the reciprocating column 24 is fixedly connected to the outer wall of the pushing plate 22, and the other end of the reciprocating column 24 is fixedly provided with a slot 25 with a notch in the upper side wall, and a telescopic spring 27 is sleeved on the outer wall of the reciprocating column 24, and the two ends of the telescopic spring 27 are respectively fixedly connected to the outer wall of the guide plate 23 and the reciprocating column 24, and the water vapor in the heating chamber 18 is heated to the heat conducting sheet After heating, as the boiler continuously generates water vapor, the pressure inside the heating chamber 18 increases, and the excess water vapor is ejected through the steam pipe 14 and contacts the fan blade 11. When the steam is ejected onto the fan blade 11, the kinetic energy and thermal energy of the steam will be transferred to the fan blade 11, causing the fan blade 11 to rotate, pushing the fan blade 11 and the rotating shaft 13 to rotate, and the end of the rotating shaft 13 drives the connecting plate 32 and the driving column 26 to rotate, and the driving column 26 rotates into the notch of the card slot 25, pushing the card slot 25 and The reciprocating column 24 moves to the right, and the piston moves to the right at this time. The piston tube 33 performs an exhaust motion, and the push column 26 rotates upward to disengage from the slot 25. Under the reverse elastic force of the telescopic spring 27, the reciprocating column 24, the slot 25, and the push plate 22 move to the left. At this time, the piston moves to the left, and the piston tube 33 performs an exhaust motion, and the air sucked into the piston tube 33 is discharged into the airbag 20, so that the airbag 20 gradually expands and pushes the U-shaped groove upward, thereby promoting the loosening of the U-shaped groove after forming; Furthermore, in order to ensure the kinetic energy of the water vapor ejected from the steam pipe 14, a steam pressure relief valve may be provided at the end of the steam pipe 14 to ensure that the pressure of the ejected water vapor is maintained within a certain range.

[0023] The outer wall of the lower mold 1 is fixed with a magnet ring 17 which is sleeved on the outer wall of the rotating shaft 13. The outer wall of the rotating shaft 13 is fixed with a coil 16 which is located in the magnet ring 17 and moves to cut the magnetic flux lines. During the rotation of the rotating shaft 13, the coil 16 is driven to move in the magnet ring 17 to cut the magnetic flux lines, so that current is generated in the coil 16. The current is collected and can be used for collecting kinetic energy for operations such as energizing the heating wire, thereby reducing energy consumption.

[0024] The outer wall of the lower mold 1 is fixed with a water tank 5 through a top support plate 4, and the lower side wall of the water tank 5 is connected with a drainage pipe 7 whose end extends into the connecting tube 8. A water supply pipe 9 is connected between the outer wall of the connecting tube 8 and the boiler 10, and the end of the drainage pipe 7 is arranged toward the fan blade 11. A vertically arranged heat conducting pipe 6 is fixedly inserted into the upper side wall of the connecting tube 8, and the lower end of the heat conducting pipe 6 contacts the inner wall of the connecting tube 8. An opening is opened on the outer wall of the heat conducting pipe 6, and the upper end of the heat conducting pipe 6 extends into the water tank 5. The middle part of the heat conducting pipe 6 is provided with multiple sections and continuous bends 15. The height of the water tank 5 is increased by the top support plate 4, and the water body is discharged downward. Kinetic energy, the water is discharged from the drain pipe 7 and contacts the fan blades 11, pushing the fan blades 11 to rotate, and then the water gathers at the bottom of the connecting tube 8 and is discharged from the water supply pipe 9 to the boiler 10. Since the heat pipe 6 is arranged in the connecting tube 8, the water vapor entering the connecting tube 8 will be absorbed by the heat pipe 6 to heat the water at the bottom of the connecting tube 8, thereby improving the problem of the water entering the boiler 10, so that the water in the boiler 10 can be quickly heated to generate water vapor, and the excess water vapor enters the heat pipe 6 from the opening, and the water vapor is spirally condensed through the multiple bends 15, and the condensed water falls to the bottom of the connecting tube 8; Furthermore, the upper end of the heat pipe 6 should be higher than the height of the water in the water tank 5, so that the excess uncondensed water vapor enters the water tank 5 and condenses the water vapor through contact with the surface of the water, which can also increase the temperature of the water in the water tank 5 and reduce the energy consumption required for subsequent heating by the boiler 10; To further illustrate, the steam pipe 14 blows the left side of the fan blade 11 to rotate upward, and the water body pushes the right side of the fan blade 11 to rotate downward. The combined kinetic energy of the two is greater, and the rotation of the fan blade 11 is more effective.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel control mold for preventing deformation of a precast concrete U-shaped groove, comprising a lower mold (1) and an upper mold (3) matching the lower mold (1), characterized in that: The inner wall of the lower mold (1) is paved with a thermoplastic film sleeve (2), a heating chamber (18) is provided in the lower mold (1), a heat conducting sheet (19) is fixedly embedded in the inner wall of the lower mold (1) and the outer wall extends into the heating chamber (18), a heating mechanism for heating the interior of the heating chamber (18) is provided on the lower mold (1), the heating mechanism comprises a boiler (10) for generating hot steam, a recess is provided on the inner bottom of the lower mold (1), an air bag (20) is fixed in the recess, a liquid bag (21) is fixed on the surface of the air bag (20), the liquid bag (21) is filled with electrorheological fluid, a heating wire is provided on the surface of the liquid bag (21), and an air supply mechanism connected to the air bag (20) is provided on the outer wall of the lower mold (1); When the U-shaped groove is demoulded after being formed, the heat conducting sheet (19) is heated by hot steam, and the heating wire is energized for heating. Under the action of heat, the thermoplastic film sleeve (2) softens and falls off. At the same time, the air supply mechanism supplies air to the airbag (20), so that the airbag (20) expands and lifts the formed U-shaped groove upward.

2. A new control mold for preventing deformation of precast concrete U-shaped grooves according to claim 1, characterized in that: The outer wall of the lower mold (1) is provided with a mounting opening (31) which is in communication with the heating chamber (18), and the boiler (10) is mounted in the mounting opening (31).

3. A new control mold for preventing deformation of precast concrete U-shaped grooves according to claim 1, characterized in that: The air supply mechanism comprises a support plate and a guide plate (23) fixed to the outer wall of the lower mold (1); a piston tube (33) is fixed to the end of the support plate; a piston is slidably arranged in the piston tube (33); a piston column is fixed to the outer wall of the piston; a push plate (22) is fixed to the end of the piston column; an air supply pipe (29) is connected between the outer wall of the piston tube (33) and the air bag (20); a one-way air inlet valve (28) is arranged on the outer wall of the piston tube (33); a one-way air outlet valve (30) is arranged on the outer wall of the air supply pipe (29); and a reciprocating mechanism for pushing the push plate (22) to move back and forth to inflate the air bag (20) is also arranged on the outer wall of the lower mold (1).

4. A new control mold for preventing deformation of precast concrete U-shaped grooves according to claim 3, characterized in that: The reciprocating mechanism comprises a connecting tube (8) fixed to the outer wall of the lower mold (1), a horizontally arranged rotating shaft (13) being mounted on the connecting tube (8), a supporting plate (12) being connected between the lower mold (1) and the rotating shaft (13), a fan blade (11) located in the connecting tube (8) being fixed to the outer wall of the rotating shaft (13), a steam pipe (14) having one end inserted into the heating chamber (18) being fixed to the connecting tube (8), the other end of the steam pipe (14) being arranged toward the fan blade (11), and an end of the rotating shaft (13) being arranged to extend toward the fan blade (11). A connecting plate (32) is fixed, a pushing column (26) is fixed to the outer wall of the connecting plate (32), a reciprocating column (24) is slidably inserted on the guide plate (23), one end of the reciprocating column (24) is fixedly connected to the outer wall of the pushing plate (22), and the other end of the reciprocating column (24) is fixedly connected to a slot (25) with a notch on the upper side wall, and a telescopic spring (27) is sleeved on the outer wall of the reciprocating column (24), and the two ends of the telescopic spring (27) are respectively fixedly connected to the guide plate (23) and the outer wall of the reciprocating column (24).

5. A new control mold for preventing deformation of precast concrete U-shaped grooves according to claim 4, characterized in that: A magnet ring (17) sleeved on the outer wall of the rotating shaft (13) is fixed to the outer wall of the lower die (1), and a coil (16) located inside the magnet ring (17) and moving to cut magnetic flux lines is fixed to the outer wall of the rotating shaft (13).

6. A new control mold for preventing deformation of precast concrete U-shaped grooves according to claim 4, characterized in that: A water tank (5) is fixed to the outer wall of the lower mold (1) via a top support plate (4); a drainage pipe (7) whose end extends into the connecting tube (8) is connected to the lower side wall of the water tank (5); a water supply pipe (9) is connected between the outer wall of the connecting tube (8) and the boiler (10); the end of the drainage pipe (7) is arranged toward the fan blade (11); a vertically arranged heat conducting pipe (6) is fixedly inserted into the upper side wall of the connecting tube (8); the lower end of the heat conducting pipe (6) contacts the inner wall of the connecting tube (8); an opening is provided on the outer wall of the heat conducting pipe (6); the upper end of the heat conducting pipe (6) extends into the water tank (5); and a plurality of continuous bends (15) are provided in the middle of the heat conducting pipe (6).

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